summaryrefslogtreecommitdiff
path: root/clang/lib/Rewrite
diff options
context:
space:
mode:
Diffstat (limited to 'clang/lib/Rewrite')
-rw-r--r--clang/lib/Rewrite/CMakeLists.txt22
-rw-r--r--clang/lib/Rewrite/DeltaTree.cpp467
-rw-r--r--clang/lib/Rewrite/FixItRewriter.cpp205
-rw-r--r--clang/lib/Rewrite/FrontendActions.cpp183
-rw-r--r--clang/lib/Rewrite/HTMLPrint.cpp94
-rw-r--r--clang/lib/Rewrite/HTMLRewrite.cpp576
-rw-r--r--clang/lib/Rewrite/Makefile18
-rw-r--r--clang/lib/Rewrite/RewriteMacros.cpp217
-rw-r--r--clang/lib/Rewrite/RewriteModernObjC.cpp7245
-rw-r--r--clang/lib/Rewrite/RewriteObjC.cpp6018
-rw-r--r--clang/lib/Rewrite/RewriteRope.cpp811
-rw-r--r--clang/lib/Rewrite/RewriteTest.cpp39
-rw-r--r--clang/lib/Rewrite/Rewriter.cpp414
-rw-r--r--clang/lib/Rewrite/TokenRewriter.cpp99
14 files changed, 16408 insertions, 0 deletions
diff --git a/clang/lib/Rewrite/CMakeLists.txt b/clang/lib/Rewrite/CMakeLists.txt
new file mode 100644
index 0000000..2a05040
--- /dev/null
+++ b/clang/lib/Rewrite/CMakeLists.txt
@@ -0,0 +1,22 @@
+set(LLVM_USED_LIBS clangBasic clangAST clangParse clangFrontend)
+
+add_clang_library(clangRewrite
+ DeltaTree.cpp
+ FixItRewriter.cpp
+ FrontendActions.cpp
+ HTMLPrint.cpp
+ HTMLRewrite.cpp
+ RewriteMacros.cpp
+ RewriteModernObjC.cpp
+ RewriteObjC.cpp
+ RewriteRope.cpp
+ RewriteTest.cpp
+ Rewriter.cpp
+ TokenRewriter.cpp
+ )
+
+add_dependencies(clangRewrite
+ ClangAttrClasses
+ ClangAttrList
+ ClangDeclNodes
+ ClangStmtNodes)
diff --git a/clang/lib/Rewrite/DeltaTree.cpp b/clang/lib/Rewrite/DeltaTree.cpp
new file mode 100644
index 0000000..4297dc8
--- /dev/null
+++ b/clang/lib/Rewrite/DeltaTree.cpp
@@ -0,0 +1,467 @@
+//===--- DeltaTree.cpp - B-Tree for Rewrite Delta tracking ----------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the DeltaTree and related classes.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/DeltaTree.h"
+#include "clang/Basic/LLVM.h"
+#include <cstring>
+#include <cstdio>
+using namespace clang;
+
+/// The DeltaTree class is a multiway search tree (BTree) structure with some
+/// fancy features. B-Trees are generally more memory and cache efficient
+/// than binary trees, because they store multiple keys/values in each node.
+///
+/// DeltaTree implements a key/value mapping from FileIndex to Delta, allowing
+/// fast lookup by FileIndex. However, an added (important) bonus is that it
+/// can also efficiently tell us the full accumulated delta for a specific
+/// file offset as well, without traversing the whole tree.
+///
+/// The nodes of the tree are made up of instances of two classes:
+/// DeltaTreeNode and DeltaTreeInteriorNode. The later subclasses the
+/// former and adds children pointers. Each node knows the full delta of all
+/// entries (recursively) contained inside of it, which allows us to get the
+/// full delta implied by a whole subtree in constant time.
+
+namespace {
+ /// SourceDelta - As code in the original input buffer is added and deleted,
+ /// SourceDelta records are used to keep track of how the input SourceLocation
+ /// object is mapped into the output buffer.
+ struct SourceDelta {
+ unsigned FileLoc;
+ int Delta;
+
+ static SourceDelta get(unsigned Loc, int D) {
+ SourceDelta Delta;
+ Delta.FileLoc = Loc;
+ Delta.Delta = D;
+ return Delta;
+ }
+ };
+
+ /// DeltaTreeNode - The common part of all nodes.
+ ///
+ class DeltaTreeNode {
+ public:
+ struct InsertResult {
+ DeltaTreeNode *LHS, *RHS;
+ SourceDelta Split;
+ };
+
+ private:
+ friend class DeltaTreeInteriorNode;
+
+ /// WidthFactor - This controls the number of K/V slots held in the BTree:
+ /// how wide it is. Each level of the BTree is guaranteed to have at least
+ /// WidthFactor-1 K/V pairs (except the root) and may have at most
+ /// 2*WidthFactor-1 K/V pairs.
+ enum { WidthFactor = 8 };
+
+ /// Values - This tracks the SourceDelta's currently in this node.
+ ///
+ SourceDelta Values[2*WidthFactor-1];
+
+ /// NumValuesUsed - This tracks the number of values this node currently
+ /// holds.
+ unsigned char NumValuesUsed;
+
+ /// IsLeaf - This is true if this is a leaf of the btree. If false, this is
+ /// an interior node, and is actually an instance of DeltaTreeInteriorNode.
+ bool IsLeaf;
+
+ /// FullDelta - This is the full delta of all the values in this node and
+ /// all children nodes.
+ int FullDelta;
+ public:
+ DeltaTreeNode(bool isLeaf = true)
+ : NumValuesUsed(0), IsLeaf(isLeaf), FullDelta(0) {}
+
+ bool isLeaf() const { return IsLeaf; }
+ int getFullDelta() const { return FullDelta; }
+ bool isFull() const { return NumValuesUsed == 2*WidthFactor-1; }
+
+ unsigned getNumValuesUsed() const { return NumValuesUsed; }
+ const SourceDelta &getValue(unsigned i) const {
+ assert(i < NumValuesUsed && "Invalid value #");
+ return Values[i];
+ }
+ SourceDelta &getValue(unsigned i) {
+ assert(i < NumValuesUsed && "Invalid value #");
+ return Values[i];
+ }
+
+ /// DoInsertion - Do an insertion of the specified FileIndex/Delta pair into
+ /// this node. If insertion is easy, do it and return false. Otherwise,
+ /// split the node, populate InsertRes with info about the split, and return
+ /// true.
+ bool DoInsertion(unsigned FileIndex, int Delta, InsertResult *InsertRes);
+
+ void DoSplit(InsertResult &InsertRes);
+
+
+ /// RecomputeFullDeltaLocally - Recompute the FullDelta field by doing a
+ /// local walk over our contained deltas.
+ void RecomputeFullDeltaLocally();
+
+ void Destroy();
+
+ //static inline bool classof(const DeltaTreeNode *) { return true; }
+ };
+} // end anonymous namespace
+
+namespace {
+ /// DeltaTreeInteriorNode - When isLeaf = false, a node has child pointers.
+ /// This class tracks them.
+ class DeltaTreeInteriorNode : public DeltaTreeNode {
+ DeltaTreeNode *Children[2*WidthFactor];
+ ~DeltaTreeInteriorNode() {
+ for (unsigned i = 0, e = NumValuesUsed+1; i != e; ++i)
+ Children[i]->Destroy();
+ }
+ friend class DeltaTreeNode;
+ public:
+ DeltaTreeInteriorNode() : DeltaTreeNode(false /*nonleaf*/) {}
+
+ DeltaTreeInteriorNode(const InsertResult &IR)
+ : DeltaTreeNode(false /*nonleaf*/) {
+ Children[0] = IR.LHS;
+ Children[1] = IR.RHS;
+ Values[0] = IR.Split;
+ FullDelta = IR.LHS->getFullDelta()+IR.RHS->getFullDelta()+IR.Split.Delta;
+ NumValuesUsed = 1;
+ }
+
+ const DeltaTreeNode *getChild(unsigned i) const {
+ assert(i < getNumValuesUsed()+1 && "Invalid child");
+ return Children[i];
+ }
+ DeltaTreeNode *getChild(unsigned i) {
+ assert(i < getNumValuesUsed()+1 && "Invalid child");
+ return Children[i];
+ }
+
+ //static inline bool classof(const DeltaTreeInteriorNode *) { return true; }
+ static inline bool classof(const DeltaTreeNode *N) { return !N->isLeaf(); }
+ };
+}
+
+
+/// Destroy - A 'virtual' destructor.
+void DeltaTreeNode::Destroy() {
+ if (isLeaf())
+ delete this;
+ else
+ delete cast<DeltaTreeInteriorNode>(this);
+}
+
+/// RecomputeFullDeltaLocally - Recompute the FullDelta field by doing a
+/// local walk over our contained deltas.
+void DeltaTreeNode::RecomputeFullDeltaLocally() {
+ int NewFullDelta = 0;
+ for (unsigned i = 0, e = getNumValuesUsed(); i != e; ++i)
+ NewFullDelta += Values[i].Delta;
+ if (DeltaTreeInteriorNode *IN = dyn_cast<DeltaTreeInteriorNode>(this))
+ for (unsigned i = 0, e = getNumValuesUsed()+1; i != e; ++i)
+ NewFullDelta += IN->getChild(i)->getFullDelta();
+ FullDelta = NewFullDelta;
+}
+
+/// DoInsertion - Do an insertion of the specified FileIndex/Delta pair into
+/// this node. If insertion is easy, do it and return false. Otherwise,
+/// split the node, populate InsertRes with info about the split, and return
+/// true.
+bool DeltaTreeNode::DoInsertion(unsigned FileIndex, int Delta,
+ InsertResult *InsertRes) {
+ // Maintain full delta for this node.
+ FullDelta += Delta;
+
+ // Find the insertion point, the first delta whose index is >= FileIndex.
+ unsigned i = 0, e = getNumValuesUsed();
+ while (i != e && FileIndex > getValue(i).FileLoc)
+ ++i;
+
+ // If we found an a record for exactly this file index, just merge this
+ // value into the pre-existing record and finish early.
+ if (i != e && getValue(i).FileLoc == FileIndex) {
+ // NOTE: Delta could drop to zero here. This means that the delta entry is
+ // useless and could be removed. Supporting erases is more complex than
+ // leaving an entry with Delta=0, so we just leave an entry with Delta=0 in
+ // the tree.
+ Values[i].Delta += Delta;
+ return false;
+ }
+
+ // Otherwise, we found an insertion point, and we know that the value at the
+ // specified index is > FileIndex. Handle the leaf case first.
+ if (isLeaf()) {
+ if (!isFull()) {
+ // For an insertion into a non-full leaf node, just insert the value in
+ // its sorted position. This requires moving later values over.
+ if (i != e)
+ memmove(&Values[i+1], &Values[i], sizeof(Values[0])*(e-i));
+ Values[i] = SourceDelta::get(FileIndex, Delta);
+ ++NumValuesUsed;
+ return false;
+ }
+
+ // Otherwise, if this is leaf is full, split the node at its median, insert
+ // the value into one of the children, and return the result.
+ assert(InsertRes && "No result location specified");
+ DoSplit(*InsertRes);
+
+ if (InsertRes->Split.FileLoc > FileIndex)
+ InsertRes->LHS->DoInsertion(FileIndex, Delta, 0 /*can't fail*/);
+ else
+ InsertRes->RHS->DoInsertion(FileIndex, Delta, 0 /*can't fail*/);
+ return true;
+ }
+
+ // Otherwise, this is an interior node. Send the request down the tree.
+ DeltaTreeInteriorNode *IN = cast<DeltaTreeInteriorNode>(this);
+ if (!IN->Children[i]->DoInsertion(FileIndex, Delta, InsertRes))
+ return false; // If there was space in the child, just return.
+
+ // Okay, this split the subtree, producing a new value and two children to
+ // insert here. If this node is non-full, we can just insert it directly.
+ if (!isFull()) {
+ // Now that we have two nodes and a new element, insert the perclated value
+ // into ourself by moving all the later values/children down, then inserting
+ // the new one.
+ if (i != e)
+ memmove(&IN->Children[i+2], &IN->Children[i+1],
+ (e-i)*sizeof(IN->Children[0]));
+ IN->Children[i] = InsertRes->LHS;
+ IN->Children[i+1] = InsertRes->RHS;
+
+ if (e != i)
+ memmove(&Values[i+1], &Values[i], (e-i)*sizeof(Values[0]));
+ Values[i] = InsertRes->Split;
+ ++NumValuesUsed;
+ return false;
+ }
+
+ // Finally, if this interior node was full and a node is percolated up, split
+ // ourself and return that up the chain. Start by saving all our info to
+ // avoid having the split clobber it.
+ IN->Children[i] = InsertRes->LHS;
+ DeltaTreeNode *SubRHS = InsertRes->RHS;
+ SourceDelta SubSplit = InsertRes->Split;
+
+ // Do the split.
+ DoSplit(*InsertRes);
+
+ // Figure out where to insert SubRHS/NewSplit.
+ DeltaTreeInteriorNode *InsertSide;
+ if (SubSplit.FileLoc < InsertRes->Split.FileLoc)
+ InsertSide = cast<DeltaTreeInteriorNode>(InsertRes->LHS);
+ else
+ InsertSide = cast<DeltaTreeInteriorNode>(InsertRes->RHS);
+
+ // We now have a non-empty interior node 'InsertSide' to insert
+ // SubRHS/SubSplit into. Find out where to insert SubSplit.
+
+ // Find the insertion point, the first delta whose index is >SubSplit.FileLoc.
+ i = 0; e = InsertSide->getNumValuesUsed();
+ while (i != e && SubSplit.FileLoc > InsertSide->getValue(i).FileLoc)
+ ++i;
+
+ // Now we know that i is the place to insert the split value into. Insert it
+ // and the child right after it.
+ if (i != e)
+ memmove(&InsertSide->Children[i+2], &InsertSide->Children[i+1],
+ (e-i)*sizeof(IN->Children[0]));
+ InsertSide->Children[i+1] = SubRHS;
+
+ if (e != i)
+ memmove(&InsertSide->Values[i+1], &InsertSide->Values[i],
+ (e-i)*sizeof(Values[0]));
+ InsertSide->Values[i] = SubSplit;
+ ++InsertSide->NumValuesUsed;
+ InsertSide->FullDelta += SubSplit.Delta + SubRHS->getFullDelta();
+ return true;
+}
+
+/// DoSplit - Split the currently full node (which has 2*WidthFactor-1 values)
+/// into two subtrees each with "WidthFactor-1" values and a pivot value.
+/// Return the pieces in InsertRes.
+void DeltaTreeNode::DoSplit(InsertResult &InsertRes) {
+ assert(isFull() && "Why split a non-full node?");
+
+ // Since this node is full, it contains 2*WidthFactor-1 values. We move
+ // the first 'WidthFactor-1' values to the LHS child (which we leave in this
+ // node), propagate one value up, and move the last 'WidthFactor-1' values
+ // into the RHS child.
+
+ // Create the new child node.
+ DeltaTreeNode *NewNode;
+ if (DeltaTreeInteriorNode *IN = dyn_cast<DeltaTreeInteriorNode>(this)) {
+ // If this is an interior node, also move over 'WidthFactor' children
+ // into the new node.
+ DeltaTreeInteriorNode *New = new DeltaTreeInteriorNode();
+ memcpy(&New->Children[0], &IN->Children[WidthFactor],
+ WidthFactor*sizeof(IN->Children[0]));
+ NewNode = New;
+ } else {
+ // Just create the new leaf node.
+ NewNode = new DeltaTreeNode();
+ }
+
+ // Move over the last 'WidthFactor-1' values from here to NewNode.
+ memcpy(&NewNode->Values[0], &Values[WidthFactor],
+ (WidthFactor-1)*sizeof(Values[0]));
+
+ // Decrease the number of values in the two nodes.
+ NewNode->NumValuesUsed = NumValuesUsed = WidthFactor-1;
+
+ // Recompute the two nodes' full delta.
+ NewNode->RecomputeFullDeltaLocally();
+ RecomputeFullDeltaLocally();
+
+ InsertRes.LHS = this;
+ InsertRes.RHS = NewNode;
+ InsertRes.Split = Values[WidthFactor-1];
+}
+
+
+
+//===----------------------------------------------------------------------===//
+// DeltaTree Implementation
+//===----------------------------------------------------------------------===//
+
+//#define VERIFY_TREE
+
+#ifdef VERIFY_TREE
+/// VerifyTree - Walk the btree performing assertions on various properties to
+/// verify consistency. This is useful for debugging new changes to the tree.
+static void VerifyTree(const DeltaTreeNode *N) {
+ const DeltaTreeInteriorNode *IN = dyn_cast<DeltaTreeInteriorNode>(N);
+ if (IN == 0) {
+ // Verify leaves, just ensure that FullDelta matches up and the elements
+ // are in proper order.
+ int FullDelta = 0;
+ for (unsigned i = 0, e = N->getNumValuesUsed(); i != e; ++i) {
+ if (i)
+ assert(N->getValue(i-1).FileLoc < N->getValue(i).FileLoc);
+ FullDelta += N->getValue(i).Delta;
+ }
+ assert(FullDelta == N->getFullDelta());
+ return;
+ }
+
+ // Verify interior nodes: Ensure that FullDelta matches up and the
+ // elements are in proper order and the children are in proper order.
+ int FullDelta = 0;
+ for (unsigned i = 0, e = IN->getNumValuesUsed(); i != e; ++i) {
+ const SourceDelta &IVal = N->getValue(i);
+ const DeltaTreeNode *IChild = IN->getChild(i);
+ if (i)
+ assert(IN->getValue(i-1).FileLoc < IVal.FileLoc);
+ FullDelta += IVal.Delta;
+ FullDelta += IChild->getFullDelta();
+
+ // The largest value in child #i should be smaller than FileLoc.
+ assert(IChild->getValue(IChild->getNumValuesUsed()-1).FileLoc <
+ IVal.FileLoc);
+
+ // The smallest value in child #i+1 should be larger than FileLoc.
+ assert(IN->getChild(i+1)->getValue(0).FileLoc > IVal.FileLoc);
+ VerifyTree(IChild);
+ }
+
+ FullDelta += IN->getChild(IN->getNumValuesUsed())->getFullDelta();
+
+ assert(FullDelta == N->getFullDelta());
+}
+#endif // VERIFY_TREE
+
+static DeltaTreeNode *getRoot(void *Root) {
+ return (DeltaTreeNode*)Root;
+}
+
+DeltaTree::DeltaTree() {
+ Root = new DeltaTreeNode();
+}
+DeltaTree::DeltaTree(const DeltaTree &RHS) {
+ // Currently we only support copying when the RHS is empty.
+ assert(getRoot(RHS.Root)->getNumValuesUsed() == 0 &&
+ "Can only copy empty tree");
+ Root = new DeltaTreeNode();
+}
+
+DeltaTree::~DeltaTree() {
+ getRoot(Root)->Destroy();
+}
+
+/// getDeltaAt - Return the accumulated delta at the specified file offset.
+/// This includes all insertions or delections that occurred *before* the
+/// specified file index.
+int DeltaTree::getDeltaAt(unsigned FileIndex) const {
+ const DeltaTreeNode *Node = getRoot(Root);
+
+ int Result = 0;
+
+ // Walk down the tree.
+ while (1) {
+ // For all nodes, include any local deltas before the specified file
+ // index by summing them up directly. Keep track of how many were
+ // included.
+ unsigned NumValsGreater = 0;
+ for (unsigned e = Node->getNumValuesUsed(); NumValsGreater != e;
+ ++NumValsGreater) {
+ const SourceDelta &Val = Node->getValue(NumValsGreater);
+
+ if (Val.FileLoc >= FileIndex)
+ break;
+ Result += Val.Delta;
+ }
+
+ // If we have an interior node, include information about children and
+ // recurse. Otherwise, if we have a leaf, we're done.
+ const DeltaTreeInteriorNode *IN = dyn_cast<DeltaTreeInteriorNode>(Node);
+ if (!IN) return Result;
+
+ // Include any children to the left of the values we skipped, all of
+ // their deltas should be included as well.
+ for (unsigned i = 0; i != NumValsGreater; ++i)
+ Result += IN->getChild(i)->getFullDelta();
+
+ // If we found exactly the value we were looking for, break off the
+ // search early. There is no need to search the RHS of the value for
+ // partial results.
+ if (NumValsGreater != Node->getNumValuesUsed() &&
+ Node->getValue(NumValsGreater).FileLoc == FileIndex)
+ return Result+IN->getChild(NumValsGreater)->getFullDelta();
+
+ // Otherwise, traverse down the tree. The selected subtree may be
+ // partially included in the range.
+ Node = IN->getChild(NumValsGreater);
+ }
+ // NOT REACHED.
+}
+
+/// AddDelta - When a change is made that shifts around the text buffer,
+/// this method is used to record that info. It inserts a delta of 'Delta'
+/// into the current DeltaTree at offset FileIndex.
+void DeltaTree::AddDelta(unsigned FileIndex, int Delta) {
+ assert(Delta && "Adding a noop?");
+ DeltaTreeNode *MyRoot = getRoot(Root);
+
+ DeltaTreeNode::InsertResult InsertRes;
+ if (MyRoot->DoInsertion(FileIndex, Delta, &InsertRes)) {
+ Root = MyRoot = new DeltaTreeInteriorNode(InsertRes);
+ }
+
+#ifdef VERIFY_TREE
+ VerifyTree(MyRoot);
+#endif
+}
+
diff --git a/clang/lib/Rewrite/FixItRewriter.cpp b/clang/lib/Rewrite/FixItRewriter.cpp
new file mode 100644
index 0000000..3863adb
--- /dev/null
+++ b/clang/lib/Rewrite/FixItRewriter.cpp
@@ -0,0 +1,205 @@
+//===--- FixItRewriter.cpp - Fix-It Rewriter Diagnostic Client --*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This is a diagnostic client adaptor that performs rewrites as
+// suggested by code modification hints attached to diagnostics. It
+// then forwards any diagnostics to the adapted diagnostic client.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/FixItRewriter.h"
+#include "clang/Edit/Commit.h"
+#include "clang/Edit/EditsReceiver.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Path.h"
+#include "llvm/ADT/OwningPtr.h"
+#include <cstdio>
+
+using namespace clang;
+
+FixItRewriter::FixItRewriter(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
+ const LangOptions &LangOpts,
+ FixItOptions *FixItOpts)
+ : Diags(Diags),
+ Editor(SourceMgr, LangOpts),
+ Rewrite(SourceMgr, LangOpts),
+ FixItOpts(FixItOpts),
+ NumFailures(0),
+ PrevDiagSilenced(false) {
+ OwnsClient = Diags.ownsClient();
+ Client = Diags.takeClient();
+ Diags.setClient(this);
+}
+
+FixItRewriter::~FixItRewriter() {
+ Diags.takeClient();
+ Diags.setClient(Client, OwnsClient);
+}
+
+bool FixItRewriter::WriteFixedFile(FileID ID, raw_ostream &OS) {
+ const RewriteBuffer *RewriteBuf = Rewrite.getRewriteBufferFor(ID);
+ if (!RewriteBuf) return true;
+ RewriteBuf->write(OS);
+ OS.flush();
+ return false;
+}
+
+namespace {
+
+class RewritesReceiver : public edit::EditsReceiver {
+ Rewriter &Rewrite;
+
+public:
+ RewritesReceiver(Rewriter &Rewrite) : Rewrite(Rewrite) { }
+
+ virtual void insert(SourceLocation loc, StringRef text) {
+ Rewrite.InsertText(loc, text);
+ }
+ virtual void replace(CharSourceRange range, StringRef text) {
+ Rewrite.ReplaceText(range.getBegin(), Rewrite.getRangeSize(range), text);
+ }
+};
+
+}
+
+bool FixItRewriter::WriteFixedFiles(
+ std::vector<std::pair<std::string, std::string> > *RewrittenFiles) {
+ if (NumFailures > 0 && !FixItOpts->FixWhatYouCan) {
+ Diag(FullSourceLoc(), diag::warn_fixit_no_changes);
+ return true;
+ }
+
+ RewritesReceiver Rec(Rewrite);
+ Editor.applyRewrites(Rec);
+
+ for (iterator I = buffer_begin(), E = buffer_end(); I != E; ++I) {
+ const FileEntry *Entry = Rewrite.getSourceMgr().getFileEntryForID(I->first);
+ int fd;
+ std::string Filename = FixItOpts->RewriteFilename(Entry->getName(), fd);
+ std::string Err;
+ OwningPtr<llvm::raw_fd_ostream> OS;
+ if (fd != -1) {
+ OS.reset(new llvm::raw_fd_ostream(fd, /*shouldClose=*/true));
+ } else {
+ OS.reset(new llvm::raw_fd_ostream(Filename.c_str(), Err,
+ llvm::raw_fd_ostream::F_Binary));
+ }
+ if (!Err.empty()) {
+ Diags.Report(clang::diag::err_fe_unable_to_open_output)
+ << Filename << Err;
+ continue;
+ }
+ RewriteBuffer &RewriteBuf = I->second;
+ RewriteBuf.write(*OS);
+ OS->flush();
+
+ if (RewrittenFiles)
+ RewrittenFiles->push_back(std::make_pair(Entry->getName(), Filename));
+ }
+
+ return false;
+}
+
+bool FixItRewriter::IncludeInDiagnosticCounts() const {
+ return Client ? Client->IncludeInDiagnosticCounts() : true;
+}
+
+void FixItRewriter::HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
+ const Diagnostic &Info) {
+ // Default implementation (Warnings/errors count).
+ DiagnosticConsumer::HandleDiagnostic(DiagLevel, Info);
+
+ if (!FixItOpts->Silent ||
+ DiagLevel >= DiagnosticsEngine::Error ||
+ (DiagLevel == DiagnosticsEngine::Note && !PrevDiagSilenced) ||
+ (DiagLevel > DiagnosticsEngine::Note && Info.getNumFixItHints())) {
+ Client->HandleDiagnostic(DiagLevel, Info);
+ PrevDiagSilenced = false;
+ } else {
+ PrevDiagSilenced = true;
+ }
+
+ // Skip over any diagnostics that are ignored or notes.
+ if (DiagLevel <= DiagnosticsEngine::Note)
+ return;
+ // Skip over errors if we are only fixing warnings.
+ if (DiagLevel >= DiagnosticsEngine::Error && FixItOpts->FixOnlyWarnings) {
+ ++NumFailures;
+ return;
+ }
+
+ // Make sure that we can perform all of the modifications we
+ // in this diagnostic.
+ edit::Commit commit(Editor);
+ for (unsigned Idx = 0, Last = Info.getNumFixItHints();
+ Idx < Last; ++Idx) {
+ const FixItHint &Hint = Info.getFixItHint(Idx);
+
+ if (Hint.CodeToInsert.empty()) {
+ if (Hint.InsertFromRange.isValid())
+ commit.insertFromRange(Hint.RemoveRange.getBegin(),
+ Hint.InsertFromRange, /*afterToken=*/false,
+ Hint.BeforePreviousInsertions);
+ else
+ commit.remove(Hint.RemoveRange);
+ } else {
+ if (Hint.RemoveRange.isTokenRange() ||
+ Hint.RemoveRange.getBegin() != Hint.RemoveRange.getEnd())
+ commit.replace(Hint.RemoveRange, Hint.CodeToInsert);
+ else
+ commit.insert(Hint.RemoveRange.getBegin(), Hint.CodeToInsert,
+ /*afterToken=*/false, Hint.BeforePreviousInsertions);
+ }
+ }
+ bool CanRewrite = Info.getNumFixItHints() > 0 && commit.isCommitable();
+
+ if (!CanRewrite) {
+ if (Info.getNumFixItHints() > 0)
+ Diag(Info.getLocation(), diag::note_fixit_in_macro);
+
+ // If this was an error, refuse to perform any rewriting.
+ if (DiagLevel >= DiagnosticsEngine::Error) {
+ if (++NumFailures == 1)
+ Diag(Info.getLocation(), diag::note_fixit_unfixed_error);
+ }
+ return;
+ }
+
+ if (!Editor.commit(commit)) {
+ ++NumFailures;
+ Diag(Info.getLocation(), diag::note_fixit_failed);
+ return;
+ }
+
+ Diag(Info.getLocation(), diag::note_fixit_applied);
+}
+
+/// \brief Emit a diagnostic via the adapted diagnostic client.
+void FixItRewriter::Diag(SourceLocation Loc, unsigned DiagID) {
+ // When producing this diagnostic, we temporarily bypass ourselves,
+ // clear out any current diagnostic, and let the downstream client
+ // format the diagnostic.
+ Diags.takeClient();
+ Diags.setClient(Client);
+ Diags.Clear();
+ Diags.Report(Loc, DiagID);
+ Diags.takeClient();
+ Diags.setClient(this);
+}
+
+DiagnosticConsumer *FixItRewriter::clone(DiagnosticsEngine &Diags) const {
+ return new FixItRewriter(Diags, Diags.getSourceManager(),
+ Rewrite.getLangOpts(), FixItOpts);
+}
+
+FixItOptions::~FixItOptions() {}
diff --git a/clang/lib/Rewrite/FrontendActions.cpp b/clang/lib/Rewrite/FrontendActions.cpp
new file mode 100644
index 0000000..1753325
--- /dev/null
+++ b/clang/lib/Rewrite/FrontendActions.cpp
@@ -0,0 +1,183 @@
+//===--- FrontendActions.cpp ----------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/FrontendActions.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Parse/Parser.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Frontend/FrontendActions.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
+#include "clang/Frontend/Utils.h"
+#include "clang/Rewrite/ASTConsumers.h"
+#include "clang/Rewrite/FixItRewriter.h"
+#include "clang/Rewrite/Rewriters.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/FileSystem.h"
+
+using namespace clang;
+
+//===----------------------------------------------------------------------===//
+// AST Consumer Actions
+//===----------------------------------------------------------------------===//
+
+ASTConsumer *HTMLPrintAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
+ return CreateHTMLPrinter(OS, CI.getPreprocessor());
+ return 0;
+}
+
+FixItAction::FixItAction() {}
+FixItAction::~FixItAction() {}
+
+ASTConsumer *FixItAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ return new ASTConsumer();
+}
+
+namespace {
+class FixItRewriteInPlace : public FixItOptions {
+public:
+ std::string RewriteFilename(const std::string &Filename, int &fd) {
+ fd = -1;
+ return Filename;
+ }
+};
+
+class FixItActionSuffixInserter : public FixItOptions {
+ std::string NewSuffix;
+
+public:
+ FixItActionSuffixInserter(std::string NewSuffix, bool FixWhatYouCan)
+ : NewSuffix(NewSuffix) {
+ this->FixWhatYouCan = FixWhatYouCan;
+ }
+
+ std::string RewriteFilename(const std::string &Filename, int &fd) {
+ fd = -1;
+ SmallString<128> Path(Filename);
+ llvm::sys::path::replace_extension(Path,
+ NewSuffix + llvm::sys::path::extension(Path));
+ return Path.str();
+ }
+};
+
+class FixItRewriteToTemp : public FixItOptions {
+public:
+ std::string RewriteFilename(const std::string &Filename, int &fd) {
+ SmallString<128> Path;
+ Path = llvm::sys::path::filename(Filename);
+ Path += "-%%%%%%%%";
+ Path += llvm::sys::path::extension(Filename);
+ SmallString<128> NewPath;
+ llvm::sys::fs::unique_file(Path.str(), fd, NewPath);
+ return NewPath.str();
+ }
+};
+} // end anonymous namespace
+
+bool FixItAction::BeginSourceFileAction(CompilerInstance &CI,
+ StringRef Filename) {
+ const FrontendOptions &FEOpts = getCompilerInstance().getFrontendOpts();
+ if (!FEOpts.FixItSuffix.empty()) {
+ FixItOpts.reset(new FixItActionSuffixInserter(FEOpts.FixItSuffix,
+ FEOpts.FixWhatYouCan));
+ } else {
+ FixItOpts.reset(new FixItRewriteInPlace);
+ FixItOpts->FixWhatYouCan = FEOpts.FixWhatYouCan;
+ }
+ Rewriter.reset(new FixItRewriter(CI.getDiagnostics(), CI.getSourceManager(),
+ CI.getLangOpts(), FixItOpts.get()));
+ return true;
+}
+
+void FixItAction::EndSourceFileAction() {
+ // Otherwise rewrite all files.
+ Rewriter->WriteFixedFiles();
+}
+
+bool FixItRecompile::BeginInvocation(CompilerInstance &CI) {
+
+ std::vector<std::pair<std::string, std::string> > RewrittenFiles;
+ bool err = false;
+ {
+ const FrontendOptions &FEOpts = CI.getFrontendOpts();
+ OwningPtr<FrontendAction> FixAction(new SyntaxOnlyAction());
+ if (FixAction->BeginSourceFile(CI, FEOpts.Inputs[0])) {
+ OwningPtr<FixItOptions> FixItOpts;
+ if (FEOpts.FixToTemporaries)
+ FixItOpts.reset(new FixItRewriteToTemp());
+ else
+ FixItOpts.reset(new FixItRewriteInPlace());
+ FixItOpts->Silent = true;
+ FixItOpts->FixWhatYouCan = FEOpts.FixWhatYouCan;
+ FixItOpts->FixOnlyWarnings = FEOpts.FixOnlyWarnings;
+ FixItRewriter Rewriter(CI.getDiagnostics(), CI.getSourceManager(),
+ CI.getLangOpts(), FixItOpts.get());
+ FixAction->Execute();
+
+ err = Rewriter.WriteFixedFiles(&RewrittenFiles);
+
+ FixAction->EndSourceFile();
+ CI.setSourceManager(0);
+ CI.setFileManager(0);
+ } else {
+ err = true;
+ }
+ }
+ if (err)
+ return false;
+ CI.getDiagnosticClient().clear();
+ CI.getDiagnostics().Reset();
+
+ PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
+ PPOpts.RemappedFiles.insert(PPOpts.RemappedFiles.end(),
+ RewrittenFiles.begin(), RewrittenFiles.end());
+ PPOpts.RemappedFilesKeepOriginalName = false;
+
+ return true;
+}
+
+//===----------------------------------------------------------------------===//
+// Preprocessor Actions
+//===----------------------------------------------------------------------===//
+
+ASTConsumer *RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "cpp")) {
+ if (CI.getLangOpts().ObjCNonFragileABI)
+ return CreateModernObjCRewriter(InFile, OS,
+ CI.getDiagnostics(), CI.getLangOpts(),
+ CI.getDiagnosticOpts().NoRewriteMacros);
+ return CreateObjCRewriter(InFile, OS,
+ CI.getDiagnostics(), CI.getLangOpts(),
+ CI.getDiagnosticOpts().NoRewriteMacros);
+ }
+ return 0;
+}
+
+void RewriteMacrosAction::ExecuteAction() {
+ CompilerInstance &CI = getCompilerInstance();
+ raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
+ if (!OS) return;
+
+ RewriteMacrosInInput(CI.getPreprocessor(), OS);
+}
+
+void RewriteTestAction::ExecuteAction() {
+ CompilerInstance &CI = getCompilerInstance();
+ raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
+ if (!OS) return;
+
+ DoRewriteTest(CI.getPreprocessor(), OS);
+}
diff --git a/clang/lib/Rewrite/HTMLPrint.cpp b/clang/lib/Rewrite/HTMLPrint.cpp
new file mode 100644
index 0000000..3d190ab
--- /dev/null
+++ b/clang/lib/Rewrite/HTMLPrint.cpp
@@ -0,0 +1,94 @@
+//===--- HTMLPrint.cpp - Source code -> HTML pretty-printing --------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Pretty-printing of source code to HTML.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/ASTConsumers.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Decl.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Rewrite/HTMLRewrite.h"
+#include "clang/Rewrite/Rewriter.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace clang;
+
+//===----------------------------------------------------------------------===//
+// Functional HTML pretty-printing.
+//===----------------------------------------------------------------------===//
+
+namespace {
+ class HTMLPrinter : public ASTConsumer {
+ Rewriter R;
+ raw_ostream *Out;
+ Preprocessor &PP;
+ bool SyntaxHighlight, HighlightMacros;
+
+ public:
+ HTMLPrinter(raw_ostream *OS, Preprocessor &pp,
+ bool _SyntaxHighlight, bool _HighlightMacros)
+ : Out(OS), PP(pp), SyntaxHighlight(_SyntaxHighlight),
+ HighlightMacros(_HighlightMacros) {}
+
+ void Initialize(ASTContext &context);
+ void HandleTranslationUnit(ASTContext &Ctx);
+ };
+}
+
+ASTConsumer* clang::CreateHTMLPrinter(raw_ostream *OS,
+ Preprocessor &PP,
+ bool SyntaxHighlight,
+ bool HighlightMacros) {
+ return new HTMLPrinter(OS, PP, SyntaxHighlight, HighlightMacros);
+}
+
+void HTMLPrinter::Initialize(ASTContext &context) {
+ R.setSourceMgr(context.getSourceManager(), context.getLangOpts());
+}
+
+void HTMLPrinter::HandleTranslationUnit(ASTContext &Ctx) {
+ if (PP.getDiagnostics().hasErrorOccurred())
+ return;
+
+ // Format the file.
+ FileID FID = R.getSourceMgr().getMainFileID();
+ const FileEntry* Entry = R.getSourceMgr().getFileEntryForID(FID);
+ const char* Name;
+ // In some cases, in particular the case where the input is from stdin,
+ // there is no entry. Fall back to the memory buffer for a name in those
+ // cases.
+ if (Entry)
+ Name = Entry->getName();
+ else
+ Name = R.getSourceMgr().getBuffer(FID)->getBufferIdentifier();
+
+ html::AddLineNumbers(R, FID);
+ html::AddHeaderFooterInternalBuiltinCSS(R, FID, Name);
+
+ // If we have a preprocessor, relex the file and syntax highlight.
+ // We might not have a preprocessor if we come from a deserialized AST file,
+ // for example.
+
+ if (SyntaxHighlight) html::SyntaxHighlight(R, FID, PP);
+ if (HighlightMacros) html::HighlightMacros(R, FID, PP);
+ html::EscapeText(R, FID, false, true);
+
+ // Emit the HTML.
+ const RewriteBuffer &RewriteBuf = R.getEditBuffer(FID);
+ char *Buffer = (char*)malloc(RewriteBuf.size());
+ std::copy(RewriteBuf.begin(), RewriteBuf.end(), Buffer);
+ Out->write(Buffer, RewriteBuf.size());
+ free(Buffer);
+}
diff --git a/clang/lib/Rewrite/HTMLRewrite.cpp b/clang/lib/Rewrite/HTMLRewrite.cpp
new file mode 100644
index 0000000..dc39dde
--- /dev/null
+++ b/clang/lib/Rewrite/HTMLRewrite.cpp
@@ -0,0 +1,576 @@
+//== HTMLRewrite.cpp - Translate source code into prettified HTML --*- C++ -*-//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the HTMLRewriter clas, which is used to translate the
+// text of a source file into prettified HTML.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Rewrite/Rewriter.h"
+#include "clang/Rewrite/HTMLRewrite.h"
+#include "clang/Lex/TokenConcatenation.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Basic/SourceManager.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace clang;
+
+
+/// HighlightRange - Highlight a range in the source code with the specified
+/// start/end tags. B/E must be in the same file. This ensures that
+/// start/end tags are placed at the start/end of each line if the range is
+/// multiline.
+void html::HighlightRange(Rewriter &R, SourceLocation B, SourceLocation E,
+ const char *StartTag, const char *EndTag) {
+ SourceManager &SM = R.getSourceMgr();
+ B = SM.getExpansionLoc(B);
+ E = SM.getExpansionLoc(E);
+ FileID FID = SM.getFileID(B);
+ assert(SM.getFileID(E) == FID && "B/E not in the same file!");
+
+ unsigned BOffset = SM.getFileOffset(B);
+ unsigned EOffset = SM.getFileOffset(E);
+
+ // Include the whole end token in the range.
+ EOffset += Lexer::MeasureTokenLength(E, R.getSourceMgr(), R.getLangOpts());
+
+ bool Invalid = false;
+ const char *BufferStart = SM.getBufferData(FID, &Invalid).data();
+ if (Invalid)
+ return;
+
+ HighlightRange(R.getEditBuffer(FID), BOffset, EOffset,
+ BufferStart, StartTag, EndTag);
+}
+
+/// HighlightRange - This is the same as the above method, but takes
+/// decomposed file locations.
+void html::HighlightRange(RewriteBuffer &RB, unsigned B, unsigned E,
+ const char *BufferStart,
+ const char *StartTag, const char *EndTag) {
+ // Insert the tag at the absolute start/end of the range.
+ RB.InsertTextAfter(B, StartTag);
+ RB.InsertTextBefore(E, EndTag);
+
+ // Scan the range to see if there is a \r or \n. If so, and if the line is
+ // not blank, insert tags on that line as well.
+ bool HadOpenTag = true;
+
+ unsigned LastNonWhiteSpace = B;
+ for (unsigned i = B; i != E; ++i) {
+ switch (BufferStart[i]) {
+ case '\r':
+ case '\n':
+ // Okay, we found a newline in the range. If we have an open tag, we need
+ // to insert a close tag at the first non-whitespace before the newline.
+ if (HadOpenTag)
+ RB.InsertTextBefore(LastNonWhiteSpace+1, EndTag);
+
+ // Instead of inserting an open tag immediately after the newline, we
+ // wait until we see a non-whitespace character. This prevents us from
+ // inserting tags around blank lines, and also allows the open tag to
+ // be put *after* whitespace on a non-blank line.
+ HadOpenTag = false;
+ break;
+ case '\0':
+ case ' ':
+ case '\t':
+ case '\f':
+ case '\v':
+ // Ignore whitespace.
+ break;
+
+ default:
+ // If there is no tag open, do it now.
+ if (!HadOpenTag) {
+ RB.InsertTextAfter(i, StartTag);
+ HadOpenTag = true;
+ }
+
+ // Remember this character.
+ LastNonWhiteSpace = i;
+ break;
+ }
+ }
+}
+
+void html::EscapeText(Rewriter &R, FileID FID,
+ bool EscapeSpaces, bool ReplaceTabs) {
+
+ const llvm::MemoryBuffer *Buf = R.getSourceMgr().getBuffer(FID);
+ const char* C = Buf->getBufferStart();
+ const char* FileEnd = Buf->getBufferEnd();
+
+ assert (C <= FileEnd);
+
+ RewriteBuffer &RB = R.getEditBuffer(FID);
+
+ unsigned ColNo = 0;
+ for (unsigned FilePos = 0; C != FileEnd ; ++C, ++FilePos) {
+ switch (*C) {
+ default: ++ColNo; break;
+ case '\n':
+ case '\r':
+ ColNo = 0;
+ break;
+
+ case ' ':
+ if (EscapeSpaces)
+ RB.ReplaceText(FilePos, 1, "&nbsp;");
+ ++ColNo;
+ break;
+ case '\f':
+ RB.ReplaceText(FilePos, 1, "<hr>");
+ ColNo = 0;
+ break;
+
+ case '\t': {
+ if (!ReplaceTabs)
+ break;
+ unsigned NumSpaces = 8-(ColNo&7);
+ if (EscapeSpaces)
+ RB.ReplaceText(FilePos, 1,
+ StringRef("&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"
+ "&nbsp;&nbsp;&nbsp;", 6*NumSpaces));
+ else
+ RB.ReplaceText(FilePos, 1, StringRef(" ", NumSpaces));
+ ColNo += NumSpaces;
+ break;
+ }
+ case '<':
+ RB.ReplaceText(FilePos, 1, "&lt;");
+ ++ColNo;
+ break;
+
+ case '>':
+ RB.ReplaceText(FilePos, 1, "&gt;");
+ ++ColNo;
+ break;
+
+ case '&':
+ RB.ReplaceText(FilePos, 1, "&amp;");
+ ++ColNo;
+ break;
+ }
+ }
+}
+
+std::string html::EscapeText(const std::string& s, bool EscapeSpaces,
+ bool ReplaceTabs) {
+
+ unsigned len = s.size();
+ std::string Str;
+ llvm::raw_string_ostream os(Str);
+
+ for (unsigned i = 0 ; i < len; ++i) {
+
+ char c = s[i];
+ switch (c) {
+ default:
+ os << c; break;
+
+ case ' ':
+ if (EscapeSpaces) os << "&nbsp;";
+ else os << ' ';
+ break;
+
+ case '\t':
+ if (ReplaceTabs) {
+ if (EscapeSpaces)
+ for (unsigned i = 0; i < 4; ++i)
+ os << "&nbsp;";
+ else
+ for (unsigned i = 0; i < 4; ++i)
+ os << " ";
+ }
+ else
+ os << c;
+
+ break;
+
+ case '<': os << "&lt;"; break;
+ case '>': os << "&gt;"; break;
+ case '&': os << "&amp;"; break;
+ }
+ }
+
+ return os.str();
+}
+
+static void AddLineNumber(RewriteBuffer &RB, unsigned LineNo,
+ unsigned B, unsigned E) {
+ SmallString<256> Str;
+ llvm::raw_svector_ostream OS(Str);
+
+ OS << "<tr><td class=\"num\" id=\"LN"
+ << LineNo << "\">"
+ << LineNo << "</td><td class=\"line\">";
+
+ if (B == E) { // Handle empty lines.
+ OS << " </td></tr>";
+ RB.InsertTextBefore(B, OS.str());
+ } else {
+ RB.InsertTextBefore(B, OS.str());
+ RB.InsertTextBefore(E, "</td></tr>");
+ }
+}
+
+void html::AddLineNumbers(Rewriter& R, FileID FID) {
+
+ const llvm::MemoryBuffer *Buf = R.getSourceMgr().getBuffer(FID);
+ const char* FileBeg = Buf->getBufferStart();
+ const char* FileEnd = Buf->getBufferEnd();
+ const char* C = FileBeg;
+ RewriteBuffer &RB = R.getEditBuffer(FID);
+
+ assert (C <= FileEnd);
+
+ unsigned LineNo = 0;
+ unsigned FilePos = 0;
+
+ while (C != FileEnd) {
+
+ ++LineNo;
+ unsigned LineStartPos = FilePos;
+ unsigned LineEndPos = FileEnd - FileBeg;
+
+ assert (FilePos <= LineEndPos);
+ assert (C < FileEnd);
+
+ // Scan until the newline (or end-of-file).
+
+ while (C != FileEnd) {
+ char c = *C;
+ ++C;
+
+ if (c == '\n') {
+ LineEndPos = FilePos++;
+ break;
+ }
+
+ ++FilePos;
+ }
+
+ AddLineNumber(RB, LineNo, LineStartPos, LineEndPos);
+ }
+
+ // Add one big table tag that surrounds all of the code.
+ RB.InsertTextBefore(0, "<table class=\"code\">\n");
+ RB.InsertTextAfter(FileEnd - FileBeg, "</table>");
+}
+
+void html::AddHeaderFooterInternalBuiltinCSS(Rewriter& R, FileID FID,
+ const char *title) {
+
+ const llvm::MemoryBuffer *Buf = R.getSourceMgr().getBuffer(FID);
+ const char* FileStart = Buf->getBufferStart();
+ const char* FileEnd = Buf->getBufferEnd();
+
+ SourceLocation StartLoc = R.getSourceMgr().getLocForStartOfFile(FID);
+ SourceLocation EndLoc = StartLoc.getLocWithOffset(FileEnd-FileStart);
+
+ std::string s;
+ llvm::raw_string_ostream os(s);
+ os << "<!doctype html>\n" // Use HTML 5 doctype
+ "<html>\n<head>\n";
+
+ if (title)
+ os << "<title>" << html::EscapeText(title) << "</title>\n";
+
+ os << "<style type=\"text/css\">\n"
+ " body { color:#000000; background-color:#ffffff }\n"
+ " body { font-family:Helvetica, sans-serif; font-size:10pt }\n"
+ " h1 { font-size:14pt }\n"
+ " .code { border-collapse:collapse; width:100%; }\n"
+ " .code { font-family: \"Monospace\", monospace; font-size:10pt }\n"
+ " .code { line-height: 1.2em }\n"
+ " .comment { color: green; font-style: oblique }\n"
+ " .keyword { color: blue }\n"
+ " .string_literal { color: red }\n"
+ " .directive { color: darkmagenta }\n"
+ // Macro expansions.
+ " .expansion { display: none; }\n"
+ " .macro:hover .expansion { display: block; border: 2px solid #FF0000; "
+ "padding: 2px; background-color:#FFF0F0; font-weight: normal; "
+ " -webkit-border-radius:5px; -webkit-box-shadow:1px 1px 7px #000; "
+ "position: absolute; top: -1em; left:10em; z-index: 1 } \n"
+ " .macro { color: darkmagenta; background-color:LemonChiffon;"
+ // Macros are position: relative to provide base for expansions.
+ " position: relative }\n"
+ " .num { width:2.5em; padding-right:2ex; background-color:#eeeeee }\n"
+ " .num { text-align:right; font-size:8pt }\n"
+ " .num { color:#444444 }\n"
+ " .line { padding-left: 1ex; border-left: 3px solid #ccc }\n"
+ " .line { white-space: pre }\n"
+ " .msg { -webkit-box-shadow:1px 1px 7px #000 }\n"
+ " .msg { -webkit-border-radius:5px }\n"
+ " .msg { font-family:Helvetica, sans-serif; font-size:8pt }\n"
+ " .msg { float:left }\n"
+ " .msg { padding:0.25em 1ex 0.25em 1ex }\n"
+ " .msg { margin-top:10px; margin-bottom:10px }\n"
+ " .msg { font-weight:bold }\n"
+ " .msg { max-width:60em; word-wrap: break-word; white-space: pre-wrap }\n"
+ " .msgT { padding:0x; spacing:0x }\n"
+ " .msgEvent { background-color:#fff8b4; color:#000000 }\n"
+ " .msgControl { background-color:#bbbbbb; color:#000000 }\n"
+ " .mrange { background-color:#dfddf3 }\n"
+ " .mrange { border-bottom:1px solid #6F9DBE }\n"
+ " .PathIndex { font-weight: bold; padding:0px 5px 0px 5px; "
+ "margin-right:5px; }\n"
+ " .PathIndex { -webkit-border-radius:8px }\n"
+ " .PathIndexEvent { background-color:#bfba87 }\n"
+ " .PathIndexControl { background-color:#8c8c8c }\n"
+ " .CodeInsertionHint { font-weight: bold; background-color: #10dd10 }\n"
+ " .CodeRemovalHint { background-color:#de1010 }\n"
+ " .CodeRemovalHint { border-bottom:1px solid #6F9DBE }\n"
+ " table.simpletable {\n"
+ " padding: 5px;\n"
+ " font-size:12pt;\n"
+ " margin:20px;\n"
+ " border-collapse: collapse; border-spacing: 0px;\n"
+ " }\n"
+ " td.rowname {\n"
+ " text-align:right; font-weight:bold; color:#444444;\n"
+ " padding-right:2ex; }\n"
+ "</style>\n</head>\n<body>";
+
+ // Generate header
+ R.InsertTextBefore(StartLoc, os.str());
+ // Generate footer
+
+ R.InsertTextAfter(EndLoc, "</body></html>\n");
+}
+
+/// SyntaxHighlight - Relex the specified FileID and annotate the HTML with
+/// information about keywords, macro expansions etc. This uses the macro
+/// table state from the end of the file, so it won't be perfectly perfect,
+/// but it will be reasonably close.
+void html::SyntaxHighlight(Rewriter &R, FileID FID, const Preprocessor &PP) {
+ RewriteBuffer &RB = R.getEditBuffer(FID);
+
+ const SourceManager &SM = PP.getSourceManager();
+ const llvm::MemoryBuffer *FromFile = SM.getBuffer(FID);
+ Lexer L(FID, FromFile, SM, PP.getLangOpts());
+ const char *BufferStart = L.getBufferStart();
+
+ // Inform the preprocessor that we want to retain comments as tokens, so we
+ // can highlight them.
+ L.SetCommentRetentionState(true);
+
+ // Lex all the tokens in raw mode, to avoid entering #includes or expanding
+ // macros.
+ Token Tok;
+ L.LexFromRawLexer(Tok);
+
+ while (Tok.isNot(tok::eof)) {
+ // Since we are lexing unexpanded tokens, all tokens are from the main
+ // FileID.
+ unsigned TokOffs = SM.getFileOffset(Tok.getLocation());
+ unsigned TokLen = Tok.getLength();
+ switch (Tok.getKind()) {
+ default: break;
+ case tok::identifier:
+ llvm_unreachable("tok::identifier in raw lexing mode!");
+ case tok::raw_identifier: {
+ // Fill in Result.IdentifierInfo and update the token kind,
+ // looking up the identifier in the identifier table.
+ PP.LookUpIdentifierInfo(Tok);
+
+ // If this is a pp-identifier, for a keyword, highlight it as such.
+ if (Tok.isNot(tok::identifier))
+ HighlightRange(RB, TokOffs, TokOffs+TokLen, BufferStart,
+ "<span class='keyword'>", "</span>");
+ break;
+ }
+ case tok::comment:
+ HighlightRange(RB, TokOffs, TokOffs+TokLen, BufferStart,
+ "<span class='comment'>", "</span>");
+ break;
+ case tok::utf8_string_literal:
+ // Chop off the u part of u8 prefix
+ ++TokOffs;
+ --TokLen;
+ // FALL THROUGH to chop the 8
+ case tok::wide_string_literal:
+ case tok::utf16_string_literal:
+ case tok::utf32_string_literal:
+ // Chop off the L, u, U or 8 prefix
+ ++TokOffs;
+ --TokLen;
+ // FALL THROUGH.
+ case tok::string_literal:
+ // FIXME: Exclude the optional ud-suffix from the highlighted range.
+ HighlightRange(RB, TokOffs, TokOffs+TokLen, BufferStart,
+ "<span class='string_literal'>", "</span>");
+ break;
+ case tok::hash: {
+ // If this is a preprocessor directive, all tokens to end of line are too.
+ if (!Tok.isAtStartOfLine())
+ break;
+
+ // Eat all of the tokens until we get to the next one at the start of
+ // line.
+ unsigned TokEnd = TokOffs+TokLen;
+ L.LexFromRawLexer(Tok);
+ while (!Tok.isAtStartOfLine() && Tok.isNot(tok::eof)) {
+ TokEnd = SM.getFileOffset(Tok.getLocation())+Tok.getLength();
+ L.LexFromRawLexer(Tok);
+ }
+
+ // Find end of line. This is a hack.
+ HighlightRange(RB, TokOffs, TokEnd, BufferStart,
+ "<span class='directive'>", "</span>");
+
+ // Don't skip the next token.
+ continue;
+ }
+ }
+
+ L.LexFromRawLexer(Tok);
+ }
+}
+
+/// HighlightMacros - This uses the macro table state from the end of the
+/// file, to re-expand macros and insert (into the HTML) information about the
+/// macro expansions. This won't be perfectly perfect, but it will be
+/// reasonably close.
+void html::HighlightMacros(Rewriter &R, FileID FID, const Preprocessor& PP) {
+ // Re-lex the raw token stream into a token buffer.
+ const SourceManager &SM = PP.getSourceManager();
+ std::vector<Token> TokenStream;
+
+ const llvm::MemoryBuffer *FromFile = SM.getBuffer(FID);
+ Lexer L(FID, FromFile, SM, PP.getLangOpts());
+
+ // Lex all the tokens in raw mode, to avoid entering #includes or expanding
+ // macros.
+ while (1) {
+ Token Tok;
+ L.LexFromRawLexer(Tok);
+
+ // If this is a # at the start of a line, discard it from the token stream.
+ // We don't want the re-preprocess step to see #defines, #includes or other
+ // preprocessor directives.
+ if (Tok.is(tok::hash) && Tok.isAtStartOfLine())
+ continue;
+
+ // If this is a ## token, change its kind to unknown so that repreprocessing
+ // it will not produce an error.
+ if (Tok.is(tok::hashhash))
+ Tok.setKind(tok::unknown);
+
+ // If this raw token is an identifier, the raw lexer won't have looked up
+ // the corresponding identifier info for it. Do this now so that it will be
+ // macro expanded when we re-preprocess it.
+ if (Tok.is(tok::raw_identifier))
+ PP.LookUpIdentifierInfo(Tok);
+
+ TokenStream.push_back(Tok);
+
+ if (Tok.is(tok::eof)) break;
+ }
+
+ // Temporarily change the diagnostics object so that we ignore any generated
+ // diagnostics from this pass.
+ DiagnosticsEngine TmpDiags(PP.getDiagnostics().getDiagnosticIDs(),
+ new IgnoringDiagConsumer);
+
+ // FIXME: This is a huge hack; we reuse the input preprocessor because we want
+ // its state, but we aren't actually changing it (we hope). This should really
+ // construct a copy of the preprocessor.
+ Preprocessor &TmpPP = const_cast<Preprocessor&>(PP);
+ DiagnosticsEngine *OldDiags = &TmpPP.getDiagnostics();
+ TmpPP.setDiagnostics(TmpDiags);
+
+ // Inform the preprocessor that we don't want comments.
+ TmpPP.SetCommentRetentionState(false, false);
+
+ // Enter the tokens we just lexed. This will cause them to be macro expanded
+ // but won't enter sub-files (because we removed #'s).
+ TmpPP.EnterTokenStream(&TokenStream[0], TokenStream.size(), false, false);
+
+ TokenConcatenation ConcatInfo(TmpPP);
+
+ // Lex all the tokens.
+ Token Tok;
+ TmpPP.Lex(Tok);
+ while (Tok.isNot(tok::eof)) {
+ // Ignore non-macro tokens.
+ if (!Tok.getLocation().isMacroID()) {
+ TmpPP.Lex(Tok);
+ continue;
+ }
+
+ // Okay, we have the first token of a macro expansion: highlight the
+ // expansion by inserting a start tag before the macro expansion and
+ // end tag after it.
+ std::pair<SourceLocation, SourceLocation> LLoc =
+ SM.getExpansionRange(Tok.getLocation());
+
+ // Ignore tokens whose instantiation location was not the main file.
+ if (SM.getFileID(LLoc.first) != FID) {
+ TmpPP.Lex(Tok);
+ continue;
+ }
+
+ assert(SM.getFileID(LLoc.second) == FID &&
+ "Start and end of expansion must be in the same ultimate file!");
+
+ std::string Expansion = EscapeText(TmpPP.getSpelling(Tok));
+ unsigned LineLen = Expansion.size();
+
+ Token PrevPrevTok;
+ Token PrevTok = Tok;
+ // Okay, eat this token, getting the next one.
+ TmpPP.Lex(Tok);
+
+ // Skip all the rest of the tokens that are part of this macro
+ // instantiation. It would be really nice to pop up a window with all the
+ // spelling of the tokens or something.
+ while (!Tok.is(tok::eof) &&
+ SM.getExpansionLoc(Tok.getLocation()) == LLoc.first) {
+ // Insert a newline if the macro expansion is getting large.
+ if (LineLen > 60) {
+ Expansion += "<br>";
+ LineLen = 0;
+ }
+
+ LineLen -= Expansion.size();
+
+ // If the tokens were already space separated, or if they must be to avoid
+ // them being implicitly pasted, add a space between them.
+ if (Tok.hasLeadingSpace() ||
+ ConcatInfo.AvoidConcat(PrevPrevTok, PrevTok, Tok))
+ Expansion += ' ';
+
+ // Escape any special characters in the token text.
+ Expansion += EscapeText(TmpPP.getSpelling(Tok));
+ LineLen += Expansion.size();
+
+ PrevPrevTok = PrevTok;
+ PrevTok = Tok;
+ TmpPP.Lex(Tok);
+ }
+
+
+ // Insert the expansion as the end tag, so that multi-line macros all get
+ // highlighted.
+ Expansion = "<span class='expansion'>" + Expansion + "</span></span>";
+
+ HighlightRange(R, LLoc.first, LLoc.second,
+ "<span class='macro'>", Expansion.c_str());
+ }
+
+ // Restore diagnostics object back to its own thing.
+ TmpPP.setDiagnostics(*OldDiags);
+}
diff --git a/clang/lib/Rewrite/Makefile b/clang/lib/Rewrite/Makefile
new file mode 100644
index 0000000..5fef9b2
--- /dev/null
+++ b/clang/lib/Rewrite/Makefile
@@ -0,0 +1,18 @@
+##===- clang/lib/Rewrite/Makefile --------------------------*- Makefile -*-===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+#
+# This implements code transformation / rewriting facilities.
+#
+##===----------------------------------------------------------------------===##
+
+CLANG_LEVEL := ../..
+LIBRARYNAME := clangRewrite
+
+include $(CLANG_LEVEL)/Makefile
+
diff --git a/clang/lib/Rewrite/RewriteMacros.cpp b/clang/lib/Rewrite/RewriteMacros.cpp
new file mode 100644
index 0000000..3fa0bdb
--- /dev/null
+++ b/clang/lib/Rewrite/RewriteMacros.cpp
@@ -0,0 +1,217 @@
+//===--- RewriteMacros.cpp - Rewrite macros into their expansions ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This code rewrites macro invocations into their expansions. This gives you
+// a macro expanded file that retains comments and #includes.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/Rewriters.h"
+#include "clang/Rewrite/Rewriter.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Basic/SourceManager.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Path.h"
+#include "llvm/ADT/OwningPtr.h"
+#include <cstdio>
+
+using namespace clang;
+
+/// isSameToken - Return true if the two specified tokens start have the same
+/// content.
+static bool isSameToken(Token &RawTok, Token &PPTok) {
+ // If two tokens have the same kind and the same identifier info, they are
+ // obviously the same.
+ if (PPTok.getKind() == RawTok.getKind() &&
+ PPTok.getIdentifierInfo() == RawTok.getIdentifierInfo())
+ return true;
+
+ // Otherwise, if they are different but have the same identifier info, they
+ // are also considered to be the same. This allows keywords and raw lexed
+ // identifiers with the same name to be treated the same.
+ if (PPTok.getIdentifierInfo() &&
+ PPTok.getIdentifierInfo() == RawTok.getIdentifierInfo())
+ return true;
+
+ return false;
+}
+
+
+/// GetNextRawTok - Return the next raw token in the stream, skipping over
+/// comments if ReturnComment is false.
+static const Token &GetNextRawTok(const std::vector<Token> &RawTokens,
+ unsigned &CurTok, bool ReturnComment) {
+ assert(CurTok < RawTokens.size() && "Overran eof!");
+
+ // If the client doesn't want comments and we have one, skip it.
+ if (!ReturnComment && RawTokens[CurTok].is(tok::comment))
+ ++CurTok;
+
+ return RawTokens[CurTok++];
+}
+
+
+/// LexRawTokensFromMainFile - Lets all the raw tokens from the main file into
+/// the specified vector.
+static void LexRawTokensFromMainFile(Preprocessor &PP,
+ std::vector<Token> &RawTokens) {
+ SourceManager &SM = PP.getSourceManager();
+
+ // Create a lexer to lex all the tokens of the main file in raw mode. Even
+ // though it is in raw mode, it will not return comments.
+ const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
+ Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOpts());
+
+ // Switch on comment lexing because we really do want them.
+ RawLex.SetCommentRetentionState(true);
+
+ Token RawTok;
+ do {
+ RawLex.LexFromRawLexer(RawTok);
+
+ // If we have an identifier with no identifier info for our raw token, look
+ // up the indentifier info. This is important for equality comparison of
+ // identifier tokens.
+ if (RawTok.is(tok::raw_identifier))
+ PP.LookUpIdentifierInfo(RawTok);
+
+ RawTokens.push_back(RawTok);
+ } while (RawTok.isNot(tok::eof));
+}
+
+
+/// RewriteMacrosInInput - Implement -rewrite-macros mode.
+void clang::RewriteMacrosInInput(Preprocessor &PP, raw_ostream *OS) {
+ SourceManager &SM = PP.getSourceManager();
+
+ Rewriter Rewrite;
+ Rewrite.setSourceMgr(SM, PP.getLangOpts());
+ RewriteBuffer &RB = Rewrite.getEditBuffer(SM.getMainFileID());
+
+ std::vector<Token> RawTokens;
+ LexRawTokensFromMainFile(PP, RawTokens);
+ unsigned CurRawTok = 0;
+ Token RawTok = GetNextRawTok(RawTokens, CurRawTok, false);
+
+
+ // Get the first preprocessing token.
+ PP.EnterMainSourceFile();
+ Token PPTok;
+ PP.Lex(PPTok);
+
+ // Preprocess the input file in parallel with raw lexing the main file. Ignore
+ // all tokens that are preprocessed from a file other than the main file (e.g.
+ // a header). If we see tokens that are in the preprocessed file but not the
+ // lexed file, we have a macro expansion. If we see tokens in the lexed file
+ // that aren't in the preprocessed view, we have macros that expand to no
+ // tokens, or macro arguments etc.
+ while (RawTok.isNot(tok::eof) || PPTok.isNot(tok::eof)) {
+ SourceLocation PPLoc = SM.getExpansionLoc(PPTok.getLocation());
+
+ // If PPTok is from a different source file, ignore it.
+ if (!SM.isFromMainFile(PPLoc)) {
+ PP.Lex(PPTok);
+ continue;
+ }
+
+ // If the raw file hits a preprocessor directive, they will be extra tokens
+ // in the raw file that don't exist in the preprocsesed file. However, we
+ // choose to preserve them in the output file and otherwise handle them
+ // specially.
+ if (RawTok.is(tok::hash) && RawTok.isAtStartOfLine()) {
+ // If this is a #warning directive or #pragma mark (GNU extensions),
+ // comment the line out.
+ if (RawTokens[CurRawTok].is(tok::identifier)) {
+ const IdentifierInfo *II = RawTokens[CurRawTok].getIdentifierInfo();
+ if (II->getName() == "warning") {
+ // Comment out #warning.
+ RB.InsertTextAfter(SM.getFileOffset(RawTok.getLocation()), "//");
+ } else if (II->getName() == "pragma" &&
+ RawTokens[CurRawTok+1].is(tok::identifier) &&
+ (RawTokens[CurRawTok+1].getIdentifierInfo()->getName() ==
+ "mark")) {
+ // Comment out #pragma mark.
+ RB.InsertTextAfter(SM.getFileOffset(RawTok.getLocation()), "//");
+ }
+ }
+
+ // Otherwise, if this is a #include or some other directive, just leave it
+ // in the file by skipping over the line.
+ RawTok = GetNextRawTok(RawTokens, CurRawTok, false);
+ while (!RawTok.isAtStartOfLine() && RawTok.isNot(tok::eof))
+ RawTok = GetNextRawTok(RawTokens, CurRawTok, false);
+ continue;
+ }
+
+ // Okay, both tokens are from the same file. Get their offsets from the
+ // start of the file.
+ unsigned PPOffs = SM.getFileOffset(PPLoc);
+ unsigned RawOffs = SM.getFileOffset(RawTok.getLocation());
+
+ // If the offsets are the same and the token kind is the same, ignore them.
+ if (PPOffs == RawOffs && isSameToken(RawTok, PPTok)) {
+ RawTok = GetNextRawTok(RawTokens, CurRawTok, false);
+ PP.Lex(PPTok);
+ continue;
+ }
+
+ // If the PP token is farther along than the raw token, something was
+ // deleted. Comment out the raw token.
+ if (RawOffs <= PPOffs) {
+ // Comment out a whole run of tokens instead of bracketing each one with
+ // comments. Add a leading space if RawTok didn't have one.
+ bool HasSpace = RawTok.hasLeadingSpace();
+ RB.InsertTextAfter(RawOffs, &" /*"[HasSpace]);
+ unsigned EndPos;
+
+ do {
+ EndPos = RawOffs+RawTok.getLength();
+
+ RawTok = GetNextRawTok(RawTokens, CurRawTok, true);
+ RawOffs = SM.getFileOffset(RawTok.getLocation());
+
+ if (RawTok.is(tok::comment)) {
+ // Skip past the comment.
+ RawTok = GetNextRawTok(RawTokens, CurRawTok, false);
+ break;
+ }
+
+ } while (RawOffs <= PPOffs && !RawTok.isAtStartOfLine() &&
+ (PPOffs != RawOffs || !isSameToken(RawTok, PPTok)));
+
+ RB.InsertTextBefore(EndPos, "*/");
+ continue;
+ }
+
+ // Otherwise, there was a replacement an expansion. Insert the new token
+ // in the output buffer. Insert the whole run of new tokens at once to get
+ // them in the right order.
+ unsigned InsertPos = PPOffs;
+ std::string Expansion;
+ while (PPOffs < RawOffs) {
+ Expansion += ' ' + PP.getSpelling(PPTok);
+ PP.Lex(PPTok);
+ PPLoc = SM.getExpansionLoc(PPTok.getLocation());
+ PPOffs = SM.getFileOffset(PPLoc);
+ }
+ Expansion += ' ';
+ RB.InsertTextBefore(InsertPos, Expansion);
+ }
+
+ // Get the buffer corresponding to MainFileID. If we haven't changed it, then
+ // we are done.
+ if (const RewriteBuffer *RewriteBuf =
+ Rewrite.getRewriteBufferFor(SM.getMainFileID())) {
+ //printf("Changed:\n");
+ *OS << std::string(RewriteBuf->begin(), RewriteBuf->end());
+ } else {
+ fprintf(stderr, "No changes\n");
+ }
+ OS->flush();
+}
diff --git a/clang/lib/Rewrite/RewriteModernObjC.cpp b/clang/lib/Rewrite/RewriteModernObjC.cpp
new file mode 100644
index 0000000..94fba64
--- /dev/null
+++ b/clang/lib/Rewrite/RewriteModernObjC.cpp
@@ -0,0 +1,7245 @@
+//===--- RewriteObjC.cpp - Playground for the code rewriter ---------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Hacks and fun related to the code rewriter.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/ASTConsumers.h"
+#include "clang/Rewrite/Rewriter.h"
+#include "clang/AST/AST.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/AST/ParentMap.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/IdentifierTable.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Lex/Lexer.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/DenseSet.h"
+
+using namespace clang;
+using llvm::utostr;
+
+namespace {
+ class RewriteModernObjC : public ASTConsumer {
+ protected:
+
+ enum {
+ BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)),
+ block, ... */
+ BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */
+ BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the
+ __block variable */
+ BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy
+ helpers */
+ BLOCK_BYREF_CALLER = 128, /* called from __block (byref) copy/dispose
+ support routines */
+ BLOCK_BYREF_CURRENT_MAX = 256
+ };
+
+ enum {
+ BLOCK_NEEDS_FREE = (1 << 24),
+ BLOCK_HAS_COPY_DISPOSE = (1 << 25),
+ BLOCK_HAS_CXX_OBJ = (1 << 26),
+ BLOCK_IS_GC = (1 << 27),
+ BLOCK_IS_GLOBAL = (1 << 28),
+ BLOCK_HAS_DESCRIPTOR = (1 << 29)
+ };
+ static const int OBJC_ABI_VERSION = 7;
+
+ Rewriter Rewrite;
+ DiagnosticsEngine &Diags;
+ const LangOptions &LangOpts;
+ ASTContext *Context;
+ SourceManager *SM;
+ TranslationUnitDecl *TUDecl;
+ FileID MainFileID;
+ const char *MainFileStart, *MainFileEnd;
+ Stmt *CurrentBody;
+ ParentMap *PropParentMap; // created lazily.
+ std::string InFileName;
+ raw_ostream* OutFile;
+ std::string Preamble;
+
+ TypeDecl *ProtocolTypeDecl;
+ VarDecl *GlobalVarDecl;
+ Expr *GlobalConstructionExp;
+ unsigned RewriteFailedDiag;
+ unsigned GlobalBlockRewriteFailedDiag;
+ // ObjC string constant support.
+ unsigned NumObjCStringLiterals;
+ VarDecl *ConstantStringClassReference;
+ RecordDecl *NSStringRecord;
+
+ // ObjC foreach break/continue generation support.
+ int BcLabelCount;
+
+ unsigned TryFinallyContainsReturnDiag;
+ // Needed for super.
+ ObjCMethodDecl *CurMethodDef;
+ RecordDecl *SuperStructDecl;
+ RecordDecl *ConstantStringDecl;
+
+ FunctionDecl *MsgSendFunctionDecl;
+ FunctionDecl *MsgSendSuperFunctionDecl;
+ FunctionDecl *MsgSendStretFunctionDecl;
+ FunctionDecl *MsgSendSuperStretFunctionDecl;
+ FunctionDecl *MsgSendFpretFunctionDecl;
+ FunctionDecl *GetClassFunctionDecl;
+ FunctionDecl *GetMetaClassFunctionDecl;
+ FunctionDecl *GetSuperClassFunctionDecl;
+ FunctionDecl *SelGetUidFunctionDecl;
+ FunctionDecl *CFStringFunctionDecl;
+ FunctionDecl *SuperContructorFunctionDecl;
+ FunctionDecl *CurFunctionDef;
+ FunctionDecl *CurFunctionDeclToDeclareForBlock;
+
+ /* Misc. containers needed for meta-data rewrite. */
+ SmallVector<ObjCImplementationDecl *, 8> ClassImplementation;
+ SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation;
+ llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs;
+ llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols;
+ llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCWrittenInterfaces;
+ llvm::SmallPtrSet<TagDecl*, 8> TagsDefinedInIvarDecls;
+ SmallVector<ObjCInterfaceDecl*, 32> ObjCInterfacesSeen;
+ /// DefinedNonLazyClasses - List of defined "non-lazy" classes.
+ SmallVector<ObjCInterfaceDecl*, 8> DefinedNonLazyClasses;
+
+ /// DefinedNonLazyCategories - List of defined "non-lazy" categories.
+ llvm::SmallVector<ObjCCategoryDecl*, 8> DefinedNonLazyCategories;
+
+ SmallVector<Stmt *, 32> Stmts;
+ SmallVector<int, 8> ObjCBcLabelNo;
+ // Remember all the @protocol(<expr>) expressions.
+ llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
+
+ llvm::DenseSet<uint64_t> CopyDestroyCache;
+
+ // Block expressions.
+ SmallVector<BlockExpr *, 32> Blocks;
+ SmallVector<int, 32> InnerDeclRefsCount;
+ SmallVector<DeclRefExpr *, 32> InnerDeclRefs;
+
+ SmallVector<DeclRefExpr *, 32> BlockDeclRefs;
+
+ // Block related declarations.
+ SmallVector<ValueDecl *, 8> BlockByCopyDecls;
+ llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
+ SmallVector<ValueDecl *, 8> BlockByRefDecls;
+ llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
+ llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
+ llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
+ llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
+
+ llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
+ llvm::DenseMap<ObjCInterfaceDecl *,
+ llvm::SmallPtrSet<ObjCIvarDecl *, 8> > ReferencedIvars;
+
+ // This maps an original source AST to it's rewritten form. This allows
+ // us to avoid rewriting the same node twice (which is very uncommon).
+ // This is needed to support some of the exotic property rewriting.
+ llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
+
+ // Needed for header files being rewritten
+ bool IsHeader;
+ bool SilenceRewriteMacroWarning;
+ bool objc_impl_method;
+
+ bool DisableReplaceStmt;
+ class DisableReplaceStmtScope {
+ RewriteModernObjC &R;
+ bool SavedValue;
+
+ public:
+ DisableReplaceStmtScope(RewriteModernObjC &R)
+ : R(R), SavedValue(R.DisableReplaceStmt) {
+ R.DisableReplaceStmt = true;
+ }
+ ~DisableReplaceStmtScope() {
+ R.DisableReplaceStmt = SavedValue;
+ }
+ };
+ void InitializeCommon(ASTContext &context);
+
+ public:
+ llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
+ // Top Level Driver code.
+ virtual bool HandleTopLevelDecl(DeclGroupRef D) {
+ for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
+ if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(*I)) {
+ if (!Class->isThisDeclarationADefinition()) {
+ RewriteForwardClassDecl(D);
+ break;
+ } else {
+ // Keep track of all interface declarations seen.
+ ObjCInterfacesSeen.push_back(Class);
+ break;
+ }
+ }
+
+ if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(*I)) {
+ if (!Proto->isThisDeclarationADefinition()) {
+ RewriteForwardProtocolDecl(D);
+ break;
+ }
+ }
+
+ HandleTopLevelSingleDecl(*I);
+ }
+ return true;
+ }
+ void HandleTopLevelSingleDecl(Decl *D);
+ void HandleDeclInMainFile(Decl *D);
+ RewriteModernObjC(std::string inFile, raw_ostream *OS,
+ DiagnosticsEngine &D, const LangOptions &LOpts,
+ bool silenceMacroWarn);
+
+ ~RewriteModernObjC() {}
+
+ virtual void HandleTranslationUnit(ASTContext &C);
+
+ void ReplaceStmt(Stmt *Old, Stmt *New) {
+ Stmt *ReplacingStmt = ReplacedNodes[Old];
+
+ if (ReplacingStmt)
+ return; // We can't rewrite the same node twice.
+
+ if (DisableReplaceStmt)
+ return;
+
+ // If replacement succeeded or warning disabled return with no warning.
+ if (!Rewrite.ReplaceStmt(Old, New)) {
+ ReplacedNodes[Old] = New;
+ return;
+ }
+ if (SilenceRewriteMacroWarning)
+ return;
+ Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
+ << Old->getSourceRange();
+ }
+
+ void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
+ if (DisableReplaceStmt)
+ return;
+
+ // Measure the old text.
+ int Size = Rewrite.getRangeSize(SrcRange);
+ if (Size == -1) {
+ Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
+ << Old->getSourceRange();
+ return;
+ }
+ // Get the new text.
+ std::string SStr;
+ llvm::raw_string_ostream S(SStr);
+ New->printPretty(S, *Context, 0, PrintingPolicy(LangOpts));
+ const std::string &Str = S.str();
+
+ // If replacement succeeded or warning disabled return with no warning.
+ if (!Rewrite.ReplaceText(SrcRange.getBegin(), Size, Str)) {
+ ReplacedNodes[Old] = New;
+ return;
+ }
+ if (SilenceRewriteMacroWarning)
+ return;
+ Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
+ << Old->getSourceRange();
+ }
+
+ void InsertText(SourceLocation Loc, StringRef Str,
+ bool InsertAfter = true) {
+ // If insertion succeeded or warning disabled return with no warning.
+ if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
+ SilenceRewriteMacroWarning)
+ return;
+
+ Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag);
+ }
+
+ void ReplaceText(SourceLocation Start, unsigned OrigLength,
+ StringRef Str) {
+ // If removal succeeded or warning disabled return with no warning.
+ if (!Rewrite.ReplaceText(Start, OrigLength, Str) ||
+ SilenceRewriteMacroWarning)
+ return;
+
+ Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag);
+ }
+
+ // Syntactic Rewriting.
+ void RewriteRecordBody(RecordDecl *RD);
+ void RewriteInclude();
+ void RewriteForwardClassDecl(DeclGroupRef D);
+ void RewriteForwardClassDecl(const llvm::SmallVector<Decl*, 8> &DG);
+ void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
+ const std::string &typedefString);
+ void RewriteImplementations();
+ void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
+ ObjCImplementationDecl *IMD,
+ ObjCCategoryImplDecl *CID);
+ void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
+ void RewriteImplementationDecl(Decl *Dcl);
+ void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
+ ObjCMethodDecl *MDecl, std::string &ResultStr);
+ void RewriteTypeIntoString(QualType T, std::string &ResultStr,
+ const FunctionType *&FPRetType);
+ void RewriteByRefString(std::string &ResultStr, const std::string &Name,
+ ValueDecl *VD, bool def=false);
+ void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
+ void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
+ void RewriteForwardProtocolDecl(DeclGroupRef D);
+ void RewriteForwardProtocolDecl(const llvm::SmallVector<Decl*, 8> &DG);
+ void RewriteMethodDeclaration(ObjCMethodDecl *Method);
+ void RewriteProperty(ObjCPropertyDecl *prop);
+ void RewriteFunctionDecl(FunctionDecl *FD);
+ void RewriteBlockPointerType(std::string& Str, QualType Type);
+ void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
+ void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
+ void RewriteTypeOfDecl(VarDecl *VD);
+ void RewriteObjCQualifiedInterfaceTypes(Expr *E);
+
+ // Expression Rewriting.
+ Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
+ Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
+ Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
+ Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
+ Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
+ Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
+ Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
+ Stmt *RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp);
+ Stmt *RewriteObjCNumericLiteralExpr(ObjCNumericLiteral *Exp);
+ Stmt *RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp);
+ Stmt *RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp);
+ Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
+ Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
+ Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
+ Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
+ Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
+ SourceLocation OrigEnd);
+ Stmt *RewriteBreakStmt(BreakStmt *S);
+ Stmt *RewriteContinueStmt(ContinueStmt *S);
+ void RewriteCastExpr(CStyleCastExpr *CE);
+ void RewriteImplicitCastObjCExpr(CastExpr *IE);
+ void RewriteLinkageSpec(LinkageSpecDecl *LSD);
+
+ // Block rewriting.
+ void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
+
+ // Block specific rewrite rules.
+ void RewriteBlockPointerDecl(NamedDecl *VD);
+ void RewriteByRefVar(VarDecl *VD);
+ Stmt *RewriteBlockDeclRefExpr(DeclRefExpr *VD);
+ Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
+ void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
+
+ void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
+ std::string &Result);
+
+ void RewriteObjCFieldDecl(FieldDecl *fieldDecl, std::string &Result);
+
+ bool RewriteObjCFieldDeclType(QualType &Type, std::string &Result);
+
+ void RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
+ std::string &Result);
+
+ virtual void Initialize(ASTContext &context);
+
+ // Misc. AST transformation routines. Somtimes they end up calling
+ // rewriting routines on the new ASTs.
+ CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
+ Expr **args, unsigned nargs,
+ SourceLocation StartLoc=SourceLocation(),
+ SourceLocation EndLoc=SourceLocation());
+
+ Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
+ SourceLocation StartLoc=SourceLocation(),
+ SourceLocation EndLoc=SourceLocation());
+
+ void SynthCountByEnumWithState(std::string &buf);
+ void SynthMsgSendFunctionDecl();
+ void SynthMsgSendSuperFunctionDecl();
+ void SynthMsgSendStretFunctionDecl();
+ void SynthMsgSendFpretFunctionDecl();
+ void SynthMsgSendSuperStretFunctionDecl();
+ void SynthGetClassFunctionDecl();
+ void SynthGetMetaClassFunctionDecl();
+ void SynthGetSuperClassFunctionDecl();
+ void SynthSelGetUidFunctionDecl();
+ void SynthSuperContructorFunctionDecl();
+
+ // Rewriting metadata
+ template<typename MethodIterator>
+ void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
+ MethodIterator MethodEnd,
+ bool IsInstanceMethod,
+ StringRef prefix,
+ StringRef ClassName,
+ std::string &Result);
+ void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
+ std::string &Result);
+ virtual void RewriteObjCProtocolListMetaData(
+ const ObjCList<ObjCProtocolDecl> &Prots,
+ StringRef prefix, StringRef ClassName, std::string &Result);
+ virtual void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
+ std::string &Result);
+ virtual void RewriteClassSetupInitHook(std::string &Result);
+
+ virtual void RewriteMetaDataIntoBuffer(std::string &Result);
+ virtual void WriteImageInfo(std::string &Result);
+ virtual void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
+ std::string &Result);
+ virtual void RewriteCategorySetupInitHook(std::string &Result);
+
+ // Rewriting ivar
+ virtual void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
+ std::string &Result);
+ virtual Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV);
+
+
+ std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
+ std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
+ StringRef funcName, std::string Tag);
+ std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
+ StringRef funcName, std::string Tag);
+ std::string SynthesizeBlockImpl(BlockExpr *CE,
+ std::string Tag, std::string Desc);
+ std::string SynthesizeBlockDescriptor(std::string DescTag,
+ std::string ImplTag,
+ int i, StringRef funcName,
+ unsigned hasCopy);
+ Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
+ void SynthesizeBlockLiterals(SourceLocation FunLocStart,
+ StringRef FunName);
+ FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
+ Stmt *SynthBlockInitExpr(BlockExpr *Exp,
+ const SmallVector<DeclRefExpr *, 8> &InnerBlockDeclRefs);
+
+ // Misc. helper routines.
+ QualType getProtocolType();
+ void WarnAboutReturnGotoStmts(Stmt *S);
+ void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
+ void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
+ void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
+
+ bool IsDeclStmtInForeachHeader(DeclStmt *DS);
+ void CollectBlockDeclRefInfo(BlockExpr *Exp);
+ void GetBlockDeclRefExprs(Stmt *S);
+ void GetInnerBlockDeclRefExprs(Stmt *S,
+ SmallVector<DeclRefExpr *, 8> &InnerBlockDeclRefs,
+ llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts);
+
+ // We avoid calling Type::isBlockPointerType(), since it operates on the
+ // canonical type. We only care if the top-level type is a closure pointer.
+ bool isTopLevelBlockPointerType(QualType T) {
+ return isa<BlockPointerType>(T);
+ }
+
+ /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
+ /// to a function pointer type and upon success, returns true; false
+ /// otherwise.
+ bool convertBlockPointerToFunctionPointer(QualType &T) {
+ if (isTopLevelBlockPointerType(T)) {
+ const BlockPointerType *BPT = T->getAs<BlockPointerType>();
+ T = Context->getPointerType(BPT->getPointeeType());
+ return true;
+ }
+ return false;
+ }
+
+ bool convertObjCTypeToCStyleType(QualType &T);
+
+ bool needToScanForQualifiers(QualType T);
+ QualType getSuperStructType();
+ QualType getConstantStringStructType();
+ QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
+ bool BufferContainsPPDirectives(const char *startBuf, const char *endBuf);
+
+ void convertToUnqualifiedObjCType(QualType &T) {
+ if (T->isObjCQualifiedIdType()) {
+ bool isConst = T.isConstQualified();
+ T = isConst ? Context->getObjCIdType().withConst()
+ : Context->getObjCIdType();
+ }
+ else if (T->isObjCQualifiedClassType())
+ T = Context->getObjCClassType();
+ else if (T->isObjCObjectPointerType() &&
+ T->getPointeeType()->isObjCQualifiedInterfaceType()) {
+ if (const ObjCObjectPointerType * OBJPT =
+ T->getAsObjCInterfacePointerType()) {
+ const ObjCInterfaceType *IFaceT = OBJPT->getInterfaceType();
+ T = QualType(IFaceT, 0);
+ T = Context->getPointerType(T);
+ }
+ }
+ }
+
+ // FIXME: This predicate seems like it would be useful to add to ASTContext.
+ bool isObjCType(QualType T) {
+ if (!LangOpts.ObjC1 && !LangOpts.ObjC2)
+ return false;
+
+ QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
+
+ if (OCT == Context->getCanonicalType(Context->getObjCIdType()) ||
+ OCT == Context->getCanonicalType(Context->getObjCClassType()))
+ return true;
+
+ if (const PointerType *PT = OCT->getAs<PointerType>()) {
+ if (isa<ObjCInterfaceType>(PT->getPointeeType()) ||
+ PT->getPointeeType()->isObjCQualifiedIdType())
+ return true;
+ }
+ return false;
+ }
+ bool PointerTypeTakesAnyBlockArguments(QualType QT);
+ bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
+ void GetExtentOfArgList(const char *Name, const char *&LParen,
+ const char *&RParen);
+
+ void QuoteDoublequotes(std::string &From, std::string &To) {
+ for (unsigned i = 0; i < From.length(); i++) {
+ if (From[i] == '"')
+ To += "\\\"";
+ else
+ To += From[i];
+ }
+ }
+
+ QualType getSimpleFunctionType(QualType result,
+ const QualType *args,
+ unsigned numArgs,
+ bool variadic = false) {
+ if (result == Context->getObjCInstanceType())
+ result = Context->getObjCIdType();
+ FunctionProtoType::ExtProtoInfo fpi;
+ fpi.Variadic = variadic;
+ return Context->getFunctionType(result, args, numArgs, fpi);
+ }
+
+ // Helper function: create a CStyleCastExpr with trivial type source info.
+ CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
+ CastKind Kind, Expr *E) {
+ TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(Ty, SourceLocation());
+ return CStyleCastExpr::Create(*Ctx, Ty, VK_RValue, Kind, E, 0, TInfo,
+ SourceLocation(), SourceLocation());
+ }
+
+ bool ImplementationIsNonLazy(const ObjCImplDecl *OD) const {
+ IdentifierInfo* II = &Context->Idents.get("load");
+ Selector LoadSel = Context->Selectors.getSelector(0, &II);
+ return OD->getClassMethod(LoadSel) != 0;
+ }
+ };
+
+}
+
+void RewriteModernObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
+ NamedDecl *D) {
+ if (const FunctionProtoType *fproto
+ = dyn_cast<FunctionProtoType>(funcType.IgnoreParens())) {
+ for (FunctionProtoType::arg_type_iterator I = fproto->arg_type_begin(),
+ E = fproto->arg_type_end(); I && (I != E); ++I)
+ if (isTopLevelBlockPointerType(*I)) {
+ // All the args are checked/rewritten. Don't call twice!
+ RewriteBlockPointerDecl(D);
+ break;
+ }
+ }
+}
+
+void RewriteModernObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
+ const PointerType *PT = funcType->getAs<PointerType>();
+ if (PT && PointerTypeTakesAnyBlockArguments(funcType))
+ RewriteBlocksInFunctionProtoType(PT->getPointeeType(), ND);
+}
+
+static bool IsHeaderFile(const std::string &Filename) {
+ std::string::size_type DotPos = Filename.rfind('.');
+
+ if (DotPos == std::string::npos) {
+ // no file extension
+ return false;
+ }
+
+ std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
+ // C header: .h
+ // C++ header: .hh or .H;
+ return Ext == "h" || Ext == "hh" || Ext == "H";
+}
+
+RewriteModernObjC::RewriteModernObjC(std::string inFile, raw_ostream* OS,
+ DiagnosticsEngine &D, const LangOptions &LOpts,
+ bool silenceMacroWarn)
+ : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(OS),
+ SilenceRewriteMacroWarning(silenceMacroWarn) {
+ IsHeader = IsHeaderFile(inFile);
+ RewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
+ "rewriting sub-expression within a macro (may not be correct)");
+ // FIXME. This should be an error. But if block is not called, it is OK. And it
+ // may break including some headers.
+ GlobalBlockRewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
+ "rewriting block literal declared in global scope is not implemented");
+
+ TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
+ DiagnosticsEngine::Warning,
+ "rewriter doesn't support user-specified control flow semantics "
+ "for @try/@finally (code may not execute properly)");
+}
+
+ASTConsumer *clang::CreateModernObjCRewriter(const std::string& InFile,
+ raw_ostream* OS,
+ DiagnosticsEngine &Diags,
+ const LangOptions &LOpts,
+ bool SilenceRewriteMacroWarning) {
+ return new RewriteModernObjC(InFile, OS, Diags, LOpts, SilenceRewriteMacroWarning);
+}
+
+void RewriteModernObjC::InitializeCommon(ASTContext &context) {
+ Context = &context;
+ SM = &Context->getSourceManager();
+ TUDecl = Context->getTranslationUnitDecl();
+ MsgSendFunctionDecl = 0;
+ MsgSendSuperFunctionDecl = 0;
+ MsgSendStretFunctionDecl = 0;
+ MsgSendSuperStretFunctionDecl = 0;
+ MsgSendFpretFunctionDecl = 0;
+ GetClassFunctionDecl = 0;
+ GetMetaClassFunctionDecl = 0;
+ GetSuperClassFunctionDecl = 0;
+ SelGetUidFunctionDecl = 0;
+ CFStringFunctionDecl = 0;
+ ConstantStringClassReference = 0;
+ NSStringRecord = 0;
+ CurMethodDef = 0;
+ CurFunctionDef = 0;
+ CurFunctionDeclToDeclareForBlock = 0;
+ GlobalVarDecl = 0;
+ GlobalConstructionExp = 0;
+ SuperStructDecl = 0;
+ ProtocolTypeDecl = 0;
+ ConstantStringDecl = 0;
+ BcLabelCount = 0;
+ SuperContructorFunctionDecl = 0;
+ NumObjCStringLiterals = 0;
+ PropParentMap = 0;
+ CurrentBody = 0;
+ DisableReplaceStmt = false;
+ objc_impl_method = false;
+
+ // Get the ID and start/end of the main file.
+ MainFileID = SM->getMainFileID();
+ const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID);
+ MainFileStart = MainBuf->getBufferStart();
+ MainFileEnd = MainBuf->getBufferEnd();
+
+ Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOpts());
+}
+
+//===----------------------------------------------------------------------===//
+// Top Level Driver Code
+//===----------------------------------------------------------------------===//
+
+void RewriteModernObjC::HandleTopLevelSingleDecl(Decl *D) {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ // Two cases: either the decl could be in the main file, or it could be in a
+ // #included file. If the former, rewrite it now. If the later, check to see
+ // if we rewrote the #include/#import.
+ SourceLocation Loc = D->getLocation();
+ Loc = SM->getExpansionLoc(Loc);
+
+ // If this is for a builtin, ignore it.
+ if (Loc.isInvalid()) return;
+
+ // Look for built-in declarations that we need to refer during the rewrite.
+ if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
+ RewriteFunctionDecl(FD);
+ } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) {
+ // declared in <Foundation/NSString.h>
+ if (FVD->getName() == "_NSConstantStringClassReference") {
+ ConstantStringClassReference = FVD;
+ return;
+ }
+ } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) {
+ RewriteCategoryDecl(CD);
+ } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) {
+ if (PD->isThisDeclarationADefinition())
+ RewriteProtocolDecl(PD);
+ } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
+ // FIXME. This will not work in all situations and leaving it out
+ // is harmless.
+ // RewriteLinkageSpec(LSD);
+
+ // Recurse into linkage specifications
+ for (DeclContext::decl_iterator DI = LSD->decls_begin(),
+ DIEnd = LSD->decls_end();
+ DI != DIEnd; ) {
+ if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>((*DI))) {
+ if (!IFace->isThisDeclarationADefinition()) {
+ SmallVector<Decl *, 8> DG;
+ SourceLocation StartLoc = IFace->getLocStart();
+ do {
+ if (isa<ObjCInterfaceDecl>(*DI) &&
+ !cast<ObjCInterfaceDecl>(*DI)->isThisDeclarationADefinition() &&
+ StartLoc == (*DI)->getLocStart())
+ DG.push_back(*DI);
+ else
+ break;
+
+ ++DI;
+ } while (DI != DIEnd);
+ RewriteForwardClassDecl(DG);
+ continue;
+ }
+ else {
+ // Keep track of all interface declarations seen.
+ ObjCInterfacesSeen.push_back(IFace);
+ ++DI;
+ continue;
+ }
+ }
+
+ if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>((*DI))) {
+ if (!Proto->isThisDeclarationADefinition()) {
+ SmallVector<Decl *, 8> DG;
+ SourceLocation StartLoc = Proto->getLocStart();
+ do {
+ if (isa<ObjCProtocolDecl>(*DI) &&
+ !cast<ObjCProtocolDecl>(*DI)->isThisDeclarationADefinition() &&
+ StartLoc == (*DI)->getLocStart())
+ DG.push_back(*DI);
+ else
+ break;
+
+ ++DI;
+ } while (DI != DIEnd);
+ RewriteForwardProtocolDecl(DG);
+ continue;
+ }
+ }
+
+ HandleTopLevelSingleDecl(*DI);
+ ++DI;
+ }
+ }
+ // If we have a decl in the main file, see if we should rewrite it.
+ if (SM->isFromMainFile(Loc))
+ return HandleDeclInMainFile(D);
+}
+
+//===----------------------------------------------------------------------===//
+// Syntactic (non-AST) Rewriting Code
+//===----------------------------------------------------------------------===//
+
+void RewriteModernObjC::RewriteInclude() {
+ SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
+ StringRef MainBuf = SM->getBufferData(MainFileID);
+ const char *MainBufStart = MainBuf.begin();
+ const char *MainBufEnd = MainBuf.end();
+ size_t ImportLen = strlen("import");
+
+ // Loop over the whole file, looking for includes.
+ for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) {
+ if (*BufPtr == '#') {
+ if (++BufPtr == MainBufEnd)
+ return;
+ while (*BufPtr == ' ' || *BufPtr == '\t')
+ if (++BufPtr == MainBufEnd)
+ return;
+ if (!strncmp(BufPtr, "import", ImportLen)) {
+ // replace import with include
+ SourceLocation ImportLoc =
+ LocStart.getLocWithOffset(BufPtr-MainBufStart);
+ ReplaceText(ImportLoc, ImportLen, "include");
+ BufPtr += ImportLen;
+ }
+ }
+ }
+}
+
+static std::string getIvarAccessString(ObjCIvarDecl *OID) {
+ const ObjCInterfaceDecl *ClassDecl = OID->getContainingInterface();
+ std::string S;
+ S = "((struct ";
+ S += ClassDecl->getIdentifier()->getName();
+ S += "_IMPL *)self)->";
+ S += OID->getName();
+ return S;
+}
+
+void RewriteModernObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
+ ObjCImplementationDecl *IMD,
+ ObjCCategoryImplDecl *CID) {
+ static bool objcGetPropertyDefined = false;
+ static bool objcSetPropertyDefined = false;
+ SourceLocation startLoc = PID->getLocStart();
+ InsertText(startLoc, "// ");
+ const char *startBuf = SM->getCharacterData(startLoc);
+ assert((*startBuf == '@') && "bogus @synthesize location");
+ const char *semiBuf = strchr(startBuf, ';');
+ assert((*semiBuf == ';') && "@synthesize: can't find ';'");
+ SourceLocation onePastSemiLoc =
+ startLoc.getLocWithOffset(semiBuf-startBuf+1);
+
+ if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
+ return; // FIXME: is this correct?
+
+ // Generate the 'getter' function.
+ ObjCPropertyDecl *PD = PID->getPropertyDecl();
+ ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
+
+ if (!OID)
+ return;
+ unsigned Attributes = PD->getPropertyAttributes();
+ if (!PD->getGetterMethodDecl()->isDefined()) {
+ bool GenGetProperty = !(Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) &&
+ (Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
+ ObjCPropertyDecl::OBJC_PR_copy));
+ std::string Getr;
+ if (GenGetProperty && !objcGetPropertyDefined) {
+ objcGetPropertyDefined = true;
+ // FIXME. Is this attribute correct in all cases?
+ Getr = "\nextern \"C\" __declspec(dllimport) "
+ "id objc_getProperty(id, SEL, long, bool);\n";
+ }
+ RewriteObjCMethodDecl(OID->getContainingInterface(),
+ PD->getGetterMethodDecl(), Getr);
+ Getr += "{ ";
+ // Synthesize an explicit cast to gain access to the ivar.
+ // See objc-act.c:objc_synthesize_new_getter() for details.
+ if (GenGetProperty) {
+ // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
+ Getr += "typedef ";
+ const FunctionType *FPRetType = 0;
+ RewriteTypeIntoString(PD->getGetterMethodDecl()->getResultType(), Getr,
+ FPRetType);
+ Getr += " _TYPE";
+ if (FPRetType) {
+ Getr += ")"; // close the precedence "scope" for "*".
+
+ // Now, emit the argument types (if any).
+ if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)){
+ Getr += "(";
+ for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) {
+ if (i) Getr += ", ";
+ std::string ParamStr = FT->getArgType(i).getAsString(
+ Context->getPrintingPolicy());
+ Getr += ParamStr;
+ }
+ if (FT->isVariadic()) {
+ if (FT->getNumArgs()) Getr += ", ";
+ Getr += "...";
+ }
+ Getr += ")";
+ } else
+ Getr += "()";
+ }
+ Getr += ";\n";
+ Getr += "return (_TYPE)";
+ Getr += "objc_getProperty(self, _cmd, ";
+ RewriteIvarOffsetComputation(OID, Getr);
+ Getr += ", 1)";
+ }
+ else
+ Getr += "return " + getIvarAccessString(OID);
+ Getr += "; }";
+ InsertText(onePastSemiLoc, Getr);
+ }
+
+ if (PD->isReadOnly() || PD->getSetterMethodDecl()->isDefined())
+ return;
+
+ // Generate the 'setter' function.
+ std::string Setr;
+ bool GenSetProperty = Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
+ ObjCPropertyDecl::OBJC_PR_copy);
+ if (GenSetProperty && !objcSetPropertyDefined) {
+ objcSetPropertyDefined = true;
+ // FIXME. Is this attribute correct in all cases?
+ Setr = "\nextern \"C\" __declspec(dllimport) "
+ "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
+ }
+
+ RewriteObjCMethodDecl(OID->getContainingInterface(),
+ PD->getSetterMethodDecl(), Setr);
+ Setr += "{ ";
+ // Synthesize an explicit cast to initialize the ivar.
+ // See objc-act.c:objc_synthesize_new_setter() for details.
+ if (GenSetProperty) {
+ Setr += "objc_setProperty (self, _cmd, ";
+ RewriteIvarOffsetComputation(OID, Setr);
+ Setr += ", (id)";
+ Setr += PD->getName();
+ Setr += ", ";
+ if (Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic)
+ Setr += "0, ";
+ else
+ Setr += "1, ";
+ if (Attributes & ObjCPropertyDecl::OBJC_PR_copy)
+ Setr += "1)";
+ else
+ Setr += "0)";
+ }
+ else {
+ Setr += getIvarAccessString(OID) + " = ";
+ Setr += PD->getName();
+ }
+ Setr += "; }";
+ InsertText(onePastSemiLoc, Setr);
+}
+
+static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
+ std::string &typedefString) {
+ typedefString += "#ifndef _REWRITER_typedef_";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += "\n";
+ typedefString += "#define _REWRITER_typedef_";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += "\n";
+ typedefString += "typedef struct objc_object ";
+ typedefString += ForwardDecl->getNameAsString();
+ // typedef struct { } _objc_exc_Classname;
+ typedefString += ";\ntypedef struct {} _objc_exc_";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += ";\n#endif\n";
+}
+
+void RewriteModernObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
+ const std::string &typedefString) {
+ SourceLocation startLoc = ClassDecl->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+ const char *semiPtr = strchr(startBuf, ';');
+ // Replace the @class with typedefs corresponding to the classes.
+ ReplaceText(startLoc, semiPtr-startBuf+1, typedefString);
+}
+
+void RewriteModernObjC::RewriteForwardClassDecl(DeclGroupRef D) {
+ std::string typedefString;
+ for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
+ ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(*I);
+ if (I == D.begin()) {
+ // Translate to typedef's that forward reference structs with the same name
+ // as the class. As a convenience, we include the original declaration
+ // as a comment.
+ typedefString += "// @class ";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += ";\n";
+ }
+ RewriteOneForwardClassDecl(ForwardDecl, typedefString);
+ }
+ DeclGroupRef::iterator I = D.begin();
+ RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(*I), typedefString);
+}
+
+void RewriteModernObjC::RewriteForwardClassDecl(
+ const llvm::SmallVector<Decl*, 8> &D) {
+ std::string typedefString;
+ for (unsigned i = 0; i < D.size(); i++) {
+ ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(D[i]);
+ if (i == 0) {
+ typedefString += "// @class ";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += ";\n";
+ }
+ RewriteOneForwardClassDecl(ForwardDecl, typedefString);
+ }
+ RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(D[0]), typedefString);
+}
+
+void RewriteModernObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
+ // When method is a synthesized one, such as a getter/setter there is
+ // nothing to rewrite.
+ if (Method->isImplicit())
+ return;
+ SourceLocation LocStart = Method->getLocStart();
+ SourceLocation LocEnd = Method->getLocEnd();
+
+ if (SM->getExpansionLineNumber(LocEnd) >
+ SM->getExpansionLineNumber(LocStart)) {
+ InsertText(LocStart, "#if 0\n");
+ ReplaceText(LocEnd, 1, ";\n#endif\n");
+ } else {
+ InsertText(LocStart, "// ");
+ }
+}
+
+void RewriteModernObjC::RewriteProperty(ObjCPropertyDecl *prop) {
+ SourceLocation Loc = prop->getAtLoc();
+
+ ReplaceText(Loc, 0, "// ");
+ // FIXME: handle properties that are declared across multiple lines.
+}
+
+void RewriteModernObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
+ SourceLocation LocStart = CatDecl->getLocStart();
+
+ // FIXME: handle category headers that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+ if (CatDecl->getIvarLBraceLoc().isValid())
+ InsertText(CatDecl->getIvarLBraceLoc(), "// ");
+ for (ObjCCategoryDecl::ivar_iterator
+ I = CatDecl->ivar_begin(), E = CatDecl->ivar_end(); I != E; ++I) {
+ ObjCIvarDecl *Ivar = (*I);
+ SourceLocation LocStart = Ivar->getLocStart();
+ ReplaceText(LocStart, 0, "// ");
+ }
+ if (CatDecl->getIvarRBraceLoc().isValid())
+ InsertText(CatDecl->getIvarRBraceLoc(), "// ");
+
+ for (ObjCCategoryDecl::prop_iterator I = CatDecl->prop_begin(),
+ E = CatDecl->prop_end(); I != E; ++I)
+ RewriteProperty(*I);
+
+ for (ObjCCategoryDecl::instmeth_iterator
+ I = CatDecl->instmeth_begin(), E = CatDecl->instmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+ for (ObjCCategoryDecl::classmeth_iterator
+ I = CatDecl->classmeth_begin(), E = CatDecl->classmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+
+ // Lastly, comment out the @end.
+ ReplaceText(CatDecl->getAtEndRange().getBegin(),
+ strlen("@end"), "/* @end */");
+}
+
+void RewriteModernObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
+ SourceLocation LocStart = PDecl->getLocStart();
+ assert(PDecl->isThisDeclarationADefinition());
+
+ // FIXME: handle protocol headers that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+
+ for (ObjCProtocolDecl::instmeth_iterator
+ I = PDecl->instmeth_begin(), E = PDecl->instmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+ for (ObjCProtocolDecl::classmeth_iterator
+ I = PDecl->classmeth_begin(), E = PDecl->classmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+
+ for (ObjCInterfaceDecl::prop_iterator I = PDecl->prop_begin(),
+ E = PDecl->prop_end(); I != E; ++I)
+ RewriteProperty(*I);
+
+ // Lastly, comment out the @end.
+ SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
+ ReplaceText(LocEnd, strlen("@end"), "/* @end */");
+
+ // Must comment out @optional/@required
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ for (const char *p = startBuf; p < endBuf; p++) {
+ if (*p == '@' && !strncmp(p+1, "optional", strlen("optional"))) {
+ SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
+ ReplaceText(OptionalLoc, strlen("@optional"), "/* @optional */");
+
+ }
+ else if (*p == '@' && !strncmp(p+1, "required", strlen("required"))) {
+ SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
+ ReplaceText(OptionalLoc, strlen("@required"), "/* @required */");
+
+ }
+ }
+}
+
+void RewriteModernObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
+ SourceLocation LocStart = (*D.begin())->getLocStart();
+ if (LocStart.isInvalid())
+ llvm_unreachable("Invalid SourceLocation");
+ // FIXME: handle forward protocol that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+}
+
+void
+RewriteModernObjC::RewriteForwardProtocolDecl(const llvm::SmallVector<Decl*, 8> &DG) {
+ SourceLocation LocStart = DG[0]->getLocStart();
+ if (LocStart.isInvalid())
+ llvm_unreachable("Invalid SourceLocation");
+ // FIXME: handle forward protocol that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+}
+
+void
+RewriteModernObjC::RewriteLinkageSpec(LinkageSpecDecl *LSD) {
+ SourceLocation LocStart = LSD->getExternLoc();
+ if (LocStart.isInvalid())
+ llvm_unreachable("Invalid extern SourceLocation");
+
+ ReplaceText(LocStart, 0, "// ");
+ if (!LSD->hasBraces())
+ return;
+ // FIXME. We don't rewrite well if '{' is not on same line as 'extern'.
+ SourceLocation LocRBrace = LSD->getRBraceLoc();
+ if (LocRBrace.isInvalid())
+ llvm_unreachable("Invalid rbrace SourceLocation");
+ ReplaceText(LocRBrace, 0, "// ");
+}
+
+void RewriteModernObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
+ const FunctionType *&FPRetType) {
+ if (T->isObjCQualifiedIdType())
+ ResultStr += "id";
+ else if (T->isFunctionPointerType() ||
+ T->isBlockPointerType()) {
+ // needs special handling, since pointer-to-functions have special
+ // syntax (where a decaration models use).
+ QualType retType = T;
+ QualType PointeeTy;
+ if (const PointerType* PT = retType->getAs<PointerType>())
+ PointeeTy = PT->getPointeeType();
+ else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
+ PointeeTy = BPT->getPointeeType();
+ if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
+ ResultStr += FPRetType->getResultType().getAsString(
+ Context->getPrintingPolicy());
+ ResultStr += "(*";
+ }
+ } else
+ ResultStr += T.getAsString(Context->getPrintingPolicy());
+}
+
+void RewriteModernObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
+ ObjCMethodDecl *OMD,
+ std::string &ResultStr) {
+ //fprintf(stderr,"In RewriteObjCMethodDecl\n");
+ const FunctionType *FPRetType = 0;
+ ResultStr += "\nstatic ";
+ RewriteTypeIntoString(OMD->getResultType(), ResultStr, FPRetType);
+ ResultStr += " ";
+
+ // Unique method name
+ std::string NameStr;
+
+ if (OMD->isInstanceMethod())
+ NameStr += "_I_";
+ else
+ NameStr += "_C_";
+
+ NameStr += IDecl->getNameAsString();
+ NameStr += "_";
+
+ if (ObjCCategoryImplDecl *CID =
+ dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
+ NameStr += CID->getNameAsString();
+ NameStr += "_";
+ }
+ // Append selector names, replacing ':' with '_'
+ {
+ std::string selString = OMD->getSelector().getAsString();
+ int len = selString.size();
+ for (int i = 0; i < len; i++)
+ if (selString[i] == ':')
+ selString[i] = '_';
+ NameStr += selString;
+ }
+ // Remember this name for metadata emission
+ MethodInternalNames[OMD] = NameStr;
+ ResultStr += NameStr;
+
+ // Rewrite arguments
+ ResultStr += "(";
+
+ // invisible arguments
+ if (OMD->isInstanceMethod()) {
+ QualType selfTy = Context->getObjCInterfaceType(IDecl);
+ selfTy = Context->getPointerType(selfTy);
+ if (!LangOpts.MicrosoftExt) {
+ if (ObjCSynthesizedStructs.count(const_cast<ObjCInterfaceDecl*>(IDecl)))
+ ResultStr += "struct ";
+ }
+ // When rewriting for Microsoft, explicitly omit the structure name.
+ ResultStr += IDecl->getNameAsString();
+ ResultStr += " *";
+ }
+ else
+ ResultStr += Context->getObjCClassType().getAsString(
+ Context->getPrintingPolicy());
+
+ ResultStr += " self, ";
+ ResultStr += Context->getObjCSelType().getAsString(Context->getPrintingPolicy());
+ ResultStr += " _cmd";
+
+ // Method arguments.
+ for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
+ E = OMD->param_end(); PI != E; ++PI) {
+ ParmVarDecl *PDecl = *PI;
+ ResultStr += ", ";
+ if (PDecl->getType()->isObjCQualifiedIdType()) {
+ ResultStr += "id ";
+ ResultStr += PDecl->getNameAsString();
+ } else {
+ std::string Name = PDecl->getNameAsString();
+ QualType QT = PDecl->getType();
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ (void)convertBlockPointerToFunctionPointer(QT);
+ QT.getAsStringInternal(Name, Context->getPrintingPolicy());
+ ResultStr += Name;
+ }
+ }
+ if (OMD->isVariadic())
+ ResultStr += ", ...";
+ ResultStr += ") ";
+
+ if (FPRetType) {
+ ResultStr += ")"; // close the precedence "scope" for "*".
+
+ // Now, emit the argument types (if any).
+ if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)) {
+ ResultStr += "(";
+ for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) {
+ if (i) ResultStr += ", ";
+ std::string ParamStr = FT->getArgType(i).getAsString(
+ Context->getPrintingPolicy());
+ ResultStr += ParamStr;
+ }
+ if (FT->isVariadic()) {
+ if (FT->getNumArgs()) ResultStr += ", ";
+ ResultStr += "...";
+ }
+ ResultStr += ")";
+ } else {
+ ResultStr += "()";
+ }
+ }
+}
+void RewriteModernObjC::RewriteImplementationDecl(Decl *OID) {
+ ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID);
+ ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID);
+
+ if (IMD) {
+ InsertText(IMD->getLocStart(), "// ");
+ if (IMD->getIvarLBraceLoc().isValid())
+ InsertText(IMD->getIvarLBraceLoc(), "// ");
+ for (ObjCImplementationDecl::ivar_iterator
+ I = IMD->ivar_begin(), E = IMD->ivar_end(); I != E; ++I) {
+ ObjCIvarDecl *Ivar = (*I);
+ SourceLocation LocStart = Ivar->getLocStart();
+ ReplaceText(LocStart, 0, "// ");
+ }
+ if (IMD->getIvarRBraceLoc().isValid())
+ InsertText(IMD->getIvarRBraceLoc(), "// ");
+ }
+ else
+ InsertText(CID->getLocStart(), "// ");
+
+ for (ObjCCategoryImplDecl::instmeth_iterator
+ I = IMD ? IMD->instmeth_begin() : CID->instmeth_begin(),
+ E = IMD ? IMD->instmeth_end() : CID->instmeth_end();
+ I != E; ++I) {
+ std::string ResultStr;
+ ObjCMethodDecl *OMD = *I;
+ RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
+ SourceLocation LocStart = OMD->getLocStart();
+ SourceLocation LocEnd = OMD->getCompoundBody()->getLocStart();
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ ReplaceText(LocStart, endBuf-startBuf, ResultStr);
+ }
+
+ for (ObjCCategoryImplDecl::classmeth_iterator
+ I = IMD ? IMD->classmeth_begin() : CID->classmeth_begin(),
+ E = IMD ? IMD->classmeth_end() : CID->classmeth_end();
+ I != E; ++I) {
+ std::string ResultStr;
+ ObjCMethodDecl *OMD = *I;
+ RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
+ SourceLocation LocStart = OMD->getLocStart();
+ SourceLocation LocEnd = OMD->getCompoundBody()->getLocStart();
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ ReplaceText(LocStart, endBuf-startBuf, ResultStr);
+ }
+ for (ObjCCategoryImplDecl::propimpl_iterator
+ I = IMD ? IMD->propimpl_begin() : CID->propimpl_begin(),
+ E = IMD ? IMD->propimpl_end() : CID->propimpl_end();
+ I != E; ++I) {
+ RewritePropertyImplDecl(*I, IMD, CID);
+ }
+
+ InsertText(IMD ? IMD->getLocEnd() : CID->getLocEnd(), "// ");
+}
+
+void RewriteModernObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
+ // Do not synthesize more than once.
+ if (ObjCSynthesizedStructs.count(ClassDecl))
+ return;
+ // Make sure super class's are written before current class is written.
+ ObjCInterfaceDecl *SuperClass = ClassDecl->getSuperClass();
+ while (SuperClass) {
+ RewriteInterfaceDecl(SuperClass);
+ SuperClass = SuperClass->getSuperClass();
+ }
+ std::string ResultStr;
+ if (!ObjCWrittenInterfaces.count(ClassDecl->getCanonicalDecl())) {
+ // we haven't seen a forward decl - generate a typedef.
+ RewriteOneForwardClassDecl(ClassDecl, ResultStr);
+ RewriteIvarOffsetSymbols(ClassDecl, ResultStr);
+
+ RewriteObjCInternalStruct(ClassDecl, ResultStr);
+ // Mark this typedef as having been written into its c++ equivalent.
+ ObjCWrittenInterfaces.insert(ClassDecl->getCanonicalDecl());
+
+ for (ObjCInterfaceDecl::prop_iterator I = ClassDecl->prop_begin(),
+ E = ClassDecl->prop_end(); I != E; ++I)
+ RewriteProperty(*I);
+ for (ObjCInterfaceDecl::instmeth_iterator
+ I = ClassDecl->instmeth_begin(), E = ClassDecl->instmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+ for (ObjCInterfaceDecl::classmeth_iterator
+ I = ClassDecl->classmeth_begin(), E = ClassDecl->classmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+
+ // Lastly, comment out the @end.
+ ReplaceText(ClassDecl->getAtEndRange().getBegin(), strlen("@end"),
+ "/* @end */");
+ }
+}
+
+Stmt *RewriteModernObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
+ SourceRange OldRange = PseudoOp->getSourceRange();
+
+ // We just magically know some things about the structure of this
+ // expression.
+ ObjCMessageExpr *OldMsg =
+ cast<ObjCMessageExpr>(PseudoOp->getSemanticExpr(
+ PseudoOp->getNumSemanticExprs() - 1));
+
+ // Because the rewriter doesn't allow us to rewrite rewritten code,
+ // we need to suppress rewriting the sub-statements.
+ Expr *Base;
+ SmallVector<Expr*, 2> Args;
+ {
+ DisableReplaceStmtScope S(*this);
+
+ // Rebuild the base expression if we have one.
+ Base = 0;
+ if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
+ Base = OldMsg->getInstanceReceiver();
+ Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
+ Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
+ }
+
+ unsigned numArgs = OldMsg->getNumArgs();
+ for (unsigned i = 0; i < numArgs; i++) {
+ Expr *Arg = OldMsg->getArg(i);
+ if (isa<OpaqueValueExpr>(Arg))
+ Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
+ Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
+ Args.push_back(Arg);
+ }
+ }
+
+ // TODO: avoid this copy.
+ SmallVector<SourceLocation, 1> SelLocs;
+ OldMsg->getSelectorLocs(SelLocs);
+
+ ObjCMessageExpr *NewMsg = 0;
+ switch (OldMsg->getReceiverKind()) {
+ case ObjCMessageExpr::Class:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getClassReceiverTypeInfo(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::Instance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ Base,
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::SuperClass:
+ case ObjCMessageExpr::SuperInstance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getSuperLoc(),
+ OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
+ OldMsg->getSuperType(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+ }
+
+ Stmt *Replacement = SynthMessageExpr(NewMsg);
+ ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
+ return Replacement;
+}
+
+Stmt *RewriteModernObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
+ SourceRange OldRange = PseudoOp->getSourceRange();
+
+ // We just magically know some things about the structure of this
+ // expression.
+ ObjCMessageExpr *OldMsg =
+ cast<ObjCMessageExpr>(PseudoOp->getResultExpr()->IgnoreImplicit());
+
+ // Because the rewriter doesn't allow us to rewrite rewritten code,
+ // we need to suppress rewriting the sub-statements.
+ Expr *Base = 0;
+ SmallVector<Expr*, 1> Args;
+ {
+ DisableReplaceStmtScope S(*this);
+ // Rebuild the base expression if we have one.
+ if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
+ Base = OldMsg->getInstanceReceiver();
+ Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
+ Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
+ }
+ unsigned numArgs = OldMsg->getNumArgs();
+ for (unsigned i = 0; i < numArgs; i++) {
+ Expr *Arg = OldMsg->getArg(i);
+ if (isa<OpaqueValueExpr>(Arg))
+ Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
+ Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
+ Args.push_back(Arg);
+ }
+ }
+
+ // Intentionally empty.
+ SmallVector<SourceLocation, 1> SelLocs;
+
+ ObjCMessageExpr *NewMsg = 0;
+ switch (OldMsg->getReceiverKind()) {
+ case ObjCMessageExpr::Class:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getClassReceiverTypeInfo(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::Instance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ Base,
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::SuperClass:
+ case ObjCMessageExpr::SuperInstance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getSuperLoc(),
+ OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
+ OldMsg->getSuperType(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+ }
+
+ Stmt *Replacement = SynthMessageExpr(NewMsg);
+ ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
+ return Replacement;
+}
+
+/// SynthCountByEnumWithState - To print:
+/// ((unsigned int (*)
+/// (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
+/// (void *)objc_msgSend)((id)l_collection,
+/// sel_registerName(
+/// "countByEnumeratingWithState:objects:count:"),
+/// &enumState,
+/// (id *)__rw_items, (unsigned int)16)
+///
+void RewriteModernObjC::SynthCountByEnumWithState(std::string &buf) {
+ buf += "((unsigned int (*) (id, SEL, struct __objcFastEnumerationState *, "
+ "id *, unsigned int))(void *)objc_msgSend)";
+ buf += "\n\t\t";
+ buf += "((id)l_collection,\n\t\t";
+ buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
+ buf += "\n\t\t";
+ buf += "&enumState, "
+ "(id *)__rw_items, (unsigned int)16)";
+}
+
+/// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
+/// statement to exit to its outer synthesized loop.
+///
+Stmt *RewriteModernObjC::RewriteBreakStmt(BreakStmt *S) {
+ if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
+ return S;
+ // replace break with goto __break_label
+ std::string buf;
+
+ SourceLocation startLoc = S->getLocStart();
+ buf = "goto __break_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ ReplaceText(startLoc, strlen("break"), buf);
+
+ return 0;
+}
+
+/// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
+/// statement to continue with its inner synthesized loop.
+///
+Stmt *RewriteModernObjC::RewriteContinueStmt(ContinueStmt *S) {
+ if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
+ return S;
+ // replace continue with goto __continue_label
+ std::string buf;
+
+ SourceLocation startLoc = S->getLocStart();
+ buf = "goto __continue_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ ReplaceText(startLoc, strlen("continue"), buf);
+
+ return 0;
+}
+
+/// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
+/// It rewrites:
+/// for ( type elem in collection) { stmts; }
+
+/// Into:
+/// {
+/// type elem;
+/// struct __objcFastEnumerationState enumState = { 0 };
+/// id __rw_items[16];
+/// id l_collection = (id)collection;
+/// unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
+/// objects:__rw_items count:16];
+/// if (limit) {
+/// unsigned long startMutations = *enumState.mutationsPtr;
+/// do {
+/// unsigned long counter = 0;
+/// do {
+/// if (startMutations != *enumState.mutationsPtr)
+/// objc_enumerationMutation(l_collection);
+/// elem = (type)enumState.itemsPtr[counter++];
+/// stmts;
+/// __continue_label: ;
+/// } while (counter < limit);
+/// } while (limit = [l_collection countByEnumeratingWithState:&enumState
+/// objects:__rw_items count:16]);
+/// elem = nil;
+/// __break_label: ;
+/// }
+/// else
+/// elem = nil;
+/// }
+///
+Stmt *RewriteModernObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
+ SourceLocation OrigEnd) {
+ assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty");
+ assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&
+ "ObjCForCollectionStmt Statement stack mismatch");
+ assert(!ObjCBcLabelNo.empty() &&
+ "ObjCForCollectionStmt - Label No stack empty");
+
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+ StringRef elementName;
+ std::string elementTypeAsString;
+ std::string buf;
+ buf = "\n{\n\t";
+ if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) {
+ // type elem;
+ NamedDecl* D = cast<NamedDecl>(DS->getSingleDecl());
+ QualType ElementType = cast<ValueDecl>(D)->getType();
+ if (ElementType->isObjCQualifiedIdType() ||
+ ElementType->isObjCQualifiedInterfaceType())
+ // Simply use 'id' for all qualified types.
+ elementTypeAsString = "id";
+ else
+ elementTypeAsString = ElementType.getAsString(Context->getPrintingPolicy());
+ buf += elementTypeAsString;
+ buf += " ";
+ elementName = D->getName();
+ buf += elementName;
+ buf += ";\n\t";
+ }
+ else {
+ DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement());
+ elementName = DR->getDecl()->getName();
+ ValueDecl *VD = cast<ValueDecl>(DR->getDecl());
+ if (VD->getType()->isObjCQualifiedIdType() ||
+ VD->getType()->isObjCQualifiedInterfaceType())
+ // Simply use 'id' for all qualified types.
+ elementTypeAsString = "id";
+ else
+ elementTypeAsString = VD->getType().getAsString(Context->getPrintingPolicy());
+ }
+
+ // struct __objcFastEnumerationState enumState = { 0 };
+ buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
+ // id __rw_items[16];
+ buf += "id __rw_items[16];\n\t";
+ // id l_collection = (id)
+ buf += "id l_collection = (id)";
+ // Find start location of 'collection' the hard way!
+ const char *startCollectionBuf = startBuf;
+ startCollectionBuf += 3; // skip 'for'
+ startCollectionBuf = strchr(startCollectionBuf, '(');
+ startCollectionBuf++; // skip '('
+ // find 'in' and skip it.
+ while (*startCollectionBuf != ' ' ||
+ *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' ||
+ (*(startCollectionBuf+3) != ' ' &&
+ *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '('))
+ startCollectionBuf++;
+ startCollectionBuf += 3;
+
+ // Replace: "for (type element in" with string constructed thus far.
+ ReplaceText(startLoc, startCollectionBuf - startBuf, buf);
+ // Replace ')' in for '(' type elem in collection ')' with ';'
+ SourceLocation rightParenLoc = S->getRParenLoc();
+ const char *rparenBuf = SM->getCharacterData(rightParenLoc);
+ SourceLocation lparenLoc = startLoc.getLocWithOffset(rparenBuf-startBuf);
+ buf = ";\n\t";
+
+ // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
+ // objects:__rw_items count:16];
+ // which is synthesized into:
+ // unsigned int limit =
+ // ((unsigned int (*)
+ // (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
+ // (void *)objc_msgSend)((id)l_collection,
+ // sel_registerName(
+ // "countByEnumeratingWithState:objects:count:"),
+ // (struct __objcFastEnumerationState *)&state,
+ // (id *)__rw_items, (unsigned int)16);
+ buf += "unsigned long limit =\n\t\t";
+ SynthCountByEnumWithState(buf);
+ buf += ";\n\t";
+ /// if (limit) {
+ /// unsigned long startMutations = *enumState.mutationsPtr;
+ /// do {
+ /// unsigned long counter = 0;
+ /// do {
+ /// if (startMutations != *enumState.mutationsPtr)
+ /// objc_enumerationMutation(l_collection);
+ /// elem = (type)enumState.itemsPtr[counter++];
+ buf += "if (limit) {\n\t";
+ buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
+ buf += "do {\n\t\t";
+ buf += "unsigned long counter = 0;\n\t\t";
+ buf += "do {\n\t\t\t";
+ buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
+ buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
+ buf += elementName;
+ buf += " = (";
+ buf += elementTypeAsString;
+ buf += ")enumState.itemsPtr[counter++];";
+ // Replace ')' in for '(' type elem in collection ')' with all of these.
+ ReplaceText(lparenLoc, 1, buf);
+
+ /// __continue_label: ;
+ /// } while (counter < limit);
+ /// } while (limit = [l_collection countByEnumeratingWithState:&enumState
+ /// objects:__rw_items count:16]);
+ /// elem = nil;
+ /// __break_label: ;
+ /// }
+ /// else
+ /// elem = nil;
+ /// }
+ ///
+ buf = ";\n\t";
+ buf += "__continue_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ buf += ": ;";
+ buf += "\n\t\t";
+ buf += "} while (counter < limit);\n\t";
+ buf += "} while (limit = ";
+ SynthCountByEnumWithState(buf);
+ buf += ");\n\t";
+ buf += elementName;
+ buf += " = ((";
+ buf += elementTypeAsString;
+ buf += ")0);\n\t";
+ buf += "__break_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ buf += ": ;\n\t";
+ buf += "}\n\t";
+ buf += "else\n\t\t";
+ buf += elementName;
+ buf += " = ((";
+ buf += elementTypeAsString;
+ buf += ")0);\n\t";
+ buf += "}\n";
+
+ // Insert all these *after* the statement body.
+ // FIXME: If this should support Obj-C++, support CXXTryStmt
+ if (isa<CompoundStmt>(S->getBody())) {
+ SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(1);
+ InsertText(endBodyLoc, buf);
+ } else {
+ /* Need to treat single statements specially. For example:
+ *
+ * for (A *a in b) if (stuff()) break;
+ * for (A *a in b) xxxyy;
+ *
+ * The following code simply scans ahead to the semi to find the actual end.
+ */
+ const char *stmtBuf = SM->getCharacterData(OrigEnd);
+ const char *semiBuf = strchr(stmtBuf, ';');
+ assert(semiBuf && "Can't find ';'");
+ SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(semiBuf-stmtBuf+1);
+ InsertText(endBodyLoc, buf);
+ }
+ Stmts.pop_back();
+ ObjCBcLabelNo.pop_back();
+ return 0;
+}
+
+static void Write_RethrowObject(std::string &buf) {
+ buf += "{ struct _FIN { _FIN(id reth) : rethrow(reth) {}\n";
+ buf += "\t~_FIN() { if (rethrow) objc_exception_throw(rethrow); }\n";
+ buf += "\tid rethrow;\n";
+ buf += "\t} _fin_force_rethow(_rethrow);";
+}
+
+/// RewriteObjCSynchronizedStmt -
+/// This routine rewrites @synchronized(expr) stmt;
+/// into:
+/// objc_sync_enter(expr);
+/// @try stmt @finally { objc_sync_exit(expr); }
+///
+Stmt *RewriteModernObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
+ // Get the start location and compute the semi location.
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '@') && "bogus @synchronized location");
+
+ std::string buf;
+ buf = "{ id _rethrow = 0; id _sync_obj = ";
+
+ const char *lparenBuf = startBuf;
+ while (*lparenBuf != '(') lparenBuf++;
+ ReplaceText(startLoc, lparenBuf-startBuf+1, buf);
+
+ buf = "; objc_sync_enter(_sync_obj);\n";
+ buf += "try {\n\tstruct _SYNC_EXIT { _SYNC_EXIT(id arg) : sync_exit(arg) {}";
+ buf += "\n\t~_SYNC_EXIT() {objc_sync_exit(sync_exit);}";
+ buf += "\n\tid sync_exit;";
+ buf += "\n\t} _sync_exit(_sync_obj);\n";
+
+ // We can't use S->getSynchExpr()->getLocEnd() to find the end location, since
+ // the sync expression is typically a message expression that's already
+ // been rewritten! (which implies the SourceLocation's are invalid).
+ SourceLocation RParenExprLoc = S->getSynchBody()->getLocStart();
+ const char *RParenExprLocBuf = SM->getCharacterData(RParenExprLoc);
+ while (*RParenExprLocBuf != ')') RParenExprLocBuf--;
+ RParenExprLoc = startLoc.getLocWithOffset(RParenExprLocBuf-startBuf);
+
+ SourceLocation LBranceLoc = S->getSynchBody()->getLocStart();
+ const char *LBraceLocBuf = SM->getCharacterData(LBranceLoc);
+ assert (*LBraceLocBuf == '{');
+ ReplaceText(RParenExprLoc, (LBraceLocBuf - SM->getCharacterData(RParenExprLoc) + 1), buf);
+
+ SourceLocation startRBraceLoc = S->getSynchBody()->getLocEnd();
+ assert((*SM->getCharacterData(startRBraceLoc) == '}') &&
+ "bogus @synchronized block");
+
+ buf = "} catch (id e) {_rethrow = e;}\n";
+ Write_RethrowObject(buf);
+ buf += "}\n";
+ buf += "}\n";
+
+ ReplaceText(startRBraceLoc, 1, buf);
+
+ return 0;
+}
+
+void RewriteModernObjC::WarnAboutReturnGotoStmts(Stmt *S)
+{
+ // Perform a bottom up traversal of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI)
+ WarnAboutReturnGotoStmts(*CI);
+
+ if (isa<ReturnStmt>(S) || isa<GotoStmt>(S)) {
+ Diags.Report(Context->getFullLoc(S->getLocStart()),
+ TryFinallyContainsReturnDiag);
+ }
+ return;
+}
+
+Stmt *RewriteModernObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
+ ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt();
+ bool noCatch = S->getNumCatchStmts() == 0;
+ std::string buf;
+
+ if (finalStmt) {
+ if (noCatch)
+ buf = "{ id volatile _rethrow = 0;\n";
+ else {
+ buf = "{ id volatile _rethrow = 0;\ntry {\n";
+ }
+ }
+ // Get the start location and compute the semi location.
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '@') && "bogus @try location");
+ if (finalStmt)
+ ReplaceText(startLoc, 1, buf);
+ else
+ // @try -> try
+ ReplaceText(startLoc, 1, "");
+
+ for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I) {
+ ObjCAtCatchStmt *Catch = S->getCatchStmt(I);
+ VarDecl *catchDecl = Catch->getCatchParamDecl();
+
+ startLoc = Catch->getLocStart();
+ bool AtRemoved = false;
+ if (catchDecl) {
+ QualType t = catchDecl->getType();
+ if (const ObjCObjectPointerType *Ptr = t->getAs<ObjCObjectPointerType>()) {
+ // Should be a pointer to a class.
+ ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
+ if (IDecl) {
+ std::string Result;
+ startBuf = SM->getCharacterData(startLoc);
+ assert((*startBuf == '@') && "bogus @catch location");
+ SourceLocation rParenLoc = Catch->getRParenLoc();
+ const char *rParenBuf = SM->getCharacterData(rParenLoc);
+
+ // _objc_exc_Foo *_e as argument to catch.
+ Result = "catch (_objc_exc_"; Result += IDecl->getNameAsString();
+ Result += " *_"; Result += catchDecl->getNameAsString();
+ Result += ")";
+ ReplaceText(startLoc, rParenBuf-startBuf+1, Result);
+ // Foo *e = (Foo *)_e;
+ Result.clear();
+ Result = "{ ";
+ Result += IDecl->getNameAsString();
+ Result += " *"; Result += catchDecl->getNameAsString();
+ Result += " = ("; Result += IDecl->getNameAsString(); Result += "*)";
+ Result += "_"; Result += catchDecl->getNameAsString();
+
+ Result += "; ";
+ SourceLocation lBraceLoc = Catch->getCatchBody()->getLocStart();
+ ReplaceText(lBraceLoc, 1, Result);
+ AtRemoved = true;
+ }
+ }
+ }
+ if (!AtRemoved)
+ // @catch -> catch
+ ReplaceText(startLoc, 1, "");
+
+ }
+ if (finalStmt) {
+ buf.clear();
+ if (noCatch)
+ buf = "catch (id e) {_rethrow = e;}\n";
+ else
+ buf = "}\ncatch (id e) {_rethrow = e;}\n";
+
+ SourceLocation startFinalLoc = finalStmt->getLocStart();
+ ReplaceText(startFinalLoc, 8, buf);
+ Stmt *body = finalStmt->getFinallyBody();
+ SourceLocation startFinalBodyLoc = body->getLocStart();
+ buf.clear();
+ Write_RethrowObject(buf);
+ ReplaceText(startFinalBodyLoc, 1, buf);
+
+ SourceLocation endFinalBodyLoc = body->getLocEnd();
+ ReplaceText(endFinalBodyLoc, 1, "}\n}");
+ // Now check for any return/continue/go statements within the @try.
+ WarnAboutReturnGotoStmts(S->getTryBody());
+ }
+
+ return 0;
+}
+
+// This can't be done with ReplaceStmt(S, ThrowExpr), since
+// the throw expression is typically a message expression that's already
+// been rewritten! (which implies the SourceLocation's are invalid).
+Stmt *RewriteModernObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
+ // Get the start location and compute the semi location.
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '@') && "bogus @throw location");
+
+ std::string buf;
+ /* void objc_exception_throw(id) __attribute__((noreturn)); */
+ if (S->getThrowExpr())
+ buf = "objc_exception_throw(";
+ else
+ buf = "throw";
+
+ // handle "@ throw" correctly.
+ const char *wBuf = strchr(startBuf, 'w');
+ assert((*wBuf == 'w') && "@throw: can't find 'w'");
+ ReplaceText(startLoc, wBuf-startBuf+1, buf);
+
+ const char *semiBuf = strchr(startBuf, ';');
+ assert((*semiBuf == ';') && "@throw: can't find ';'");
+ SourceLocation semiLoc = startLoc.getLocWithOffset(semiBuf-startBuf);
+ if (S->getThrowExpr())
+ ReplaceText(semiLoc, 1, ");");
+ return 0;
+}
+
+Stmt *RewriteModernObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
+ // Create a new string expression.
+ QualType StrType = Context->getPointerType(Context->CharTy);
+ std::string StrEncoding;
+ Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding);
+ Expr *Replacement = StringLiteral::Create(*Context, StrEncoding,
+ StringLiteral::Ascii, false,
+ StrType, SourceLocation());
+ ReplaceStmt(Exp, Replacement);
+
+ // Replace this subexpr in the parent.
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return Replacement;
+}
+
+Stmt *RewriteModernObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
+ if (!SelGetUidFunctionDecl)
+ SynthSelGetUidFunctionDecl();
+ assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl");
+ // Create a call to sel_registerName("selName").
+ SmallVector<Expr*, 8> SelExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ SelExprs.push_back(StringLiteral::Create(*Context,
+ Exp->getSelector().getAsString(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
+ &SelExprs[0], SelExprs.size());
+ ReplaceStmt(Exp, SelExp);
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return SelExp;
+}
+
+CallExpr *RewriteModernObjC::SynthesizeCallToFunctionDecl(
+ FunctionDecl *FD, Expr **args, unsigned nargs, SourceLocation StartLoc,
+ SourceLocation EndLoc) {
+ // Get the type, we will need to reference it in a couple spots.
+ QualType msgSendType = FD->getType();
+
+ // Create a reference to the objc_msgSend() declaration.
+ DeclRefExpr *DRE =
+ new (Context) DeclRefExpr(FD, false, msgSendType, VK_LValue, SourceLocation());
+
+ // Now, we cast the reference to a pointer to the objc_msgSend type.
+ QualType pToFunc = Context->getPointerType(msgSendType);
+ ImplicitCastExpr *ICE =
+ ImplicitCastExpr::Create(*Context, pToFunc, CK_FunctionToPointerDecay,
+ DRE, 0, VK_RValue);
+
+ const FunctionType *FT = msgSendType->getAs<FunctionType>();
+
+ CallExpr *Exp =
+ new (Context) CallExpr(*Context, ICE, args, nargs,
+ FT->getCallResultType(*Context),
+ VK_RValue, EndLoc);
+ return Exp;
+}
+
+static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
+ const char *&startRef, const char *&endRef) {
+ while (startBuf < endBuf) {
+ if (*startBuf == '<')
+ startRef = startBuf; // mark the start.
+ if (*startBuf == '>') {
+ if (startRef && *startRef == '<') {
+ endRef = startBuf; // mark the end.
+ return true;
+ }
+ return false;
+ }
+ startBuf++;
+ }
+ return false;
+}
+
+static void scanToNextArgument(const char *&argRef) {
+ int angle = 0;
+ while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
+ if (*argRef == '<')
+ angle++;
+ else if (*argRef == '>')
+ angle--;
+ argRef++;
+ }
+ assert(angle == 0 && "scanToNextArgument - bad protocol type syntax");
+}
+
+bool RewriteModernObjC::needToScanForQualifiers(QualType T) {
+ if (T->isObjCQualifiedIdType())
+ return true;
+ if (const PointerType *PT = T->getAs<PointerType>()) {
+ if (PT->getPointeeType()->isObjCQualifiedIdType())
+ return true;
+ }
+ if (T->isObjCObjectPointerType()) {
+ T = T->getPointeeType();
+ return T->isObjCQualifiedInterfaceType();
+ }
+ if (T->isArrayType()) {
+ QualType ElemTy = Context->getBaseElementType(T);
+ return needToScanForQualifiers(ElemTy);
+ }
+ return false;
+}
+
+void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
+ QualType Type = E->getType();
+ if (needToScanForQualifiers(Type)) {
+ SourceLocation Loc, EndLoc;
+
+ if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E)) {
+ Loc = ECE->getLParenLoc();
+ EndLoc = ECE->getRParenLoc();
+ } else {
+ Loc = E->getLocStart();
+ EndLoc = E->getLocEnd();
+ }
+ // This will defend against trying to rewrite synthesized expressions.
+ if (Loc.isInvalid() || EndLoc.isInvalid())
+ return;
+
+ const char *startBuf = SM->getCharacterData(Loc);
+ const char *endBuf = SM->getCharacterData(EndLoc);
+ const char *startRef = 0, *endRef = 0;
+ if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
+ // Get the locations of the startRef, endRef.
+ SourceLocation LessLoc = Loc.getLocWithOffset(startRef-startBuf);
+ SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-startBuf+1);
+ // Comment out the protocol references.
+ InsertText(LessLoc, "/*");
+ InsertText(GreaterLoc, "*/");
+ }
+ }
+}
+
+void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
+ SourceLocation Loc;
+ QualType Type;
+ const FunctionProtoType *proto = 0;
+ if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) {
+ Loc = VD->getLocation();
+ Type = VD->getType();
+ }
+ else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) {
+ Loc = FD->getLocation();
+ // Check for ObjC 'id' and class types that have been adorned with protocol
+ // information (id<p>, C<p>*). The protocol references need to be rewritten!
+ const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
+ assert(funcType && "missing function type");
+ proto = dyn_cast<FunctionProtoType>(funcType);
+ if (!proto)
+ return;
+ Type = proto->getResultType();
+ }
+ else if (FieldDecl *FD = dyn_cast<FieldDecl>(Dcl)) {
+ Loc = FD->getLocation();
+ Type = FD->getType();
+ }
+ else
+ return;
+
+ if (needToScanForQualifiers(Type)) {
+ // Since types are unique, we need to scan the buffer.
+
+ const char *endBuf = SM->getCharacterData(Loc);
+ const char *startBuf = endBuf;
+ while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart)
+ startBuf--; // scan backward (from the decl location) for return type.
+ const char *startRef = 0, *endRef = 0;
+ if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
+ // Get the locations of the startRef, endRef.
+ SourceLocation LessLoc = Loc.getLocWithOffset(startRef-endBuf);
+ SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-endBuf+1);
+ // Comment out the protocol references.
+ InsertText(LessLoc, "/*");
+ InsertText(GreaterLoc, "*/");
+ }
+ }
+ if (!proto)
+ return; // most likely, was a variable
+ // Now check arguments.
+ const char *startBuf = SM->getCharacterData(Loc);
+ const char *startFuncBuf = startBuf;
+ for (unsigned i = 0; i < proto->getNumArgs(); i++) {
+ if (needToScanForQualifiers(proto->getArgType(i))) {
+ // Since types are unique, we need to scan the buffer.
+
+ const char *endBuf = startBuf;
+ // scan forward (from the decl location) for argument types.
+ scanToNextArgument(endBuf);
+ const char *startRef = 0, *endRef = 0;
+ if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
+ // Get the locations of the startRef, endRef.
+ SourceLocation LessLoc =
+ Loc.getLocWithOffset(startRef-startFuncBuf);
+ SourceLocation GreaterLoc =
+ Loc.getLocWithOffset(endRef-startFuncBuf+1);
+ // Comment out the protocol references.
+ InsertText(LessLoc, "/*");
+ InsertText(GreaterLoc, "*/");
+ }
+ startBuf = ++endBuf;
+ }
+ else {
+ // If the function name is derived from a macro expansion, then the
+ // argument buffer will not follow the name. Need to speak with Chris.
+ while (*startBuf && *startBuf != ')' && *startBuf != ',')
+ startBuf++; // scan forward (from the decl location) for argument types.
+ startBuf++;
+ }
+ }
+}
+
+void RewriteModernObjC::RewriteTypeOfDecl(VarDecl *ND) {
+ QualType QT = ND->getType();
+ const Type* TypePtr = QT->getAs<Type>();
+ if (!isa<TypeOfExprType>(TypePtr))
+ return;
+ while (isa<TypeOfExprType>(TypePtr)) {
+ const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
+ QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
+ TypePtr = QT->getAs<Type>();
+ }
+ // FIXME. This will not work for multiple declarators; as in:
+ // __typeof__(a) b,c,d;
+ std::string TypeAsString(QT.getAsString(Context->getPrintingPolicy()));
+ SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
+ const char *startBuf = SM->getCharacterData(DeclLoc);
+ if (ND->getInit()) {
+ std::string Name(ND->getNameAsString());
+ TypeAsString += " " + Name + " = ";
+ Expr *E = ND->getInit();
+ SourceLocation startLoc;
+ if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
+ startLoc = ECE->getLParenLoc();
+ else
+ startLoc = E->getLocStart();
+ startLoc = SM->getExpansionLoc(startLoc);
+ const char *endBuf = SM->getCharacterData(startLoc);
+ ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
+ }
+ else {
+ SourceLocation X = ND->getLocEnd();
+ X = SM->getExpansionLoc(X);
+ const char *endBuf = SM->getCharacterData(X);
+ ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
+ }
+}
+
+// SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
+void RewriteModernObjC::SynthSelGetUidFunctionDecl() {
+ IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
+ QualType getFuncType =
+ getSimpleFunctionType(Context->getObjCSelType(), &ArgTys[0], ArgTys.size());
+ SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ SelGetUidIdent, getFuncType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+void RewriteModernObjC::RewriteFunctionDecl(FunctionDecl *FD) {
+ // declared in <objc/objc.h>
+ if (FD->getIdentifier() &&
+ FD->getName() == "sel_registerName") {
+ SelGetUidFunctionDecl = FD;
+ return;
+ }
+ RewriteObjCQualifiedInterfaceTypes(FD);
+}
+
+void RewriteModernObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
+ std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
+ const char *argPtr = TypeString.c_str();
+ if (!strchr(argPtr, '^')) {
+ Str += TypeString;
+ return;
+ }
+ while (*argPtr) {
+ Str += (*argPtr == '^' ? '*' : *argPtr);
+ argPtr++;
+ }
+}
+
+// FIXME. Consolidate this routine with RewriteBlockPointerType.
+void RewriteModernObjC::RewriteBlockPointerTypeVariable(std::string& Str,
+ ValueDecl *VD) {
+ QualType Type = VD->getType();
+ std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
+ const char *argPtr = TypeString.c_str();
+ int paren = 0;
+ while (*argPtr) {
+ switch (*argPtr) {
+ case '(':
+ Str += *argPtr;
+ paren++;
+ break;
+ case ')':
+ Str += *argPtr;
+ paren--;
+ break;
+ case '^':
+ Str += '*';
+ if (paren == 1)
+ Str += VD->getNameAsString();
+ break;
+ default:
+ Str += *argPtr;
+ break;
+ }
+ argPtr++;
+ }
+}
+
+// SynthSuperContructorFunctionDecl - id __rw_objc_super(id obj, id super);
+void RewriteModernObjC::SynthSuperContructorFunctionDecl() {
+ if (SuperContructorFunctionDecl)
+ return;
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("__rw_objc_super");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size());
+ SuperContructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
+void RewriteModernObjC::SynthMsgSendFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(void);
+void RewriteModernObjC::SynthMsgSendSuperFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
+ SmallVector<QualType, 2> ArgTys;
+ ArgTys.push_back(Context->VoidTy);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], 1,
+ true /*isVariadic*/);
+ MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
+void RewriteModernObjC::SynthMsgSendStretFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendSuperStretFunctionDecl -
+// id objc_msgSendSuper_stret(void);
+void RewriteModernObjC::SynthMsgSendSuperStretFunctionDecl() {
+ IdentifierInfo *msgSendIdent =
+ &Context->Idents.get("objc_msgSendSuper_stret");
+ SmallVector<QualType, 2> ArgTys;
+ ArgTys.push_back(Context->VoidTy);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], 1,
+ true /*isVariadic*/);
+ MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
+void RewriteModernObjC::SynthMsgSendFpretFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->DoubleTy,
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthGetClassFunctionDecl - id objc_getClass(const char *name);
+void RewriteModernObjC::SynthGetClassFunctionDecl() {
+ IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
+ QualType getClassType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size());
+ GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ getClassIdent, getClassType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
+void RewriteModernObjC::SynthGetSuperClassFunctionDecl() {
+ IdentifierInfo *getSuperClassIdent =
+ &Context->Idents.get("class_getSuperclass");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getObjCClassType());
+ QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
+ &ArgTys[0], ArgTys.size());
+ GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ getSuperClassIdent,
+ getClassType, 0,
+ SC_Extern,
+ SC_None,
+ false);
+}
+
+// SynthGetMetaClassFunctionDecl - id objc_getMetaClass(const char *name);
+void RewriteModernObjC::SynthGetMetaClassFunctionDecl() {
+ IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
+ QualType getClassType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size());
+ GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ getClassIdent, getClassType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+Stmt *RewriteModernObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
+ QualType strType = getConstantStringStructType();
+
+ std::string S = "__NSConstantStringImpl_";
+
+ std::string tmpName = InFileName;
+ unsigned i;
+ for (i=0; i < tmpName.length(); i++) {
+ char c = tmpName.at(i);
+ // replace any non alphanumeric characters with '_'.
+ if (!isalpha(c) && (c < '0' || c > '9'))
+ tmpName[i] = '_';
+ }
+ S += tmpName;
+ S += "_";
+ S += utostr(NumObjCStringLiterals++);
+
+ Preamble += "static __NSConstantStringImpl " + S;
+ Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
+ Preamble += "0x000007c8,"; // utf8_str
+ // The pretty printer for StringLiteral handles escape characters properly.
+ std::string prettyBufS;
+ llvm::raw_string_ostream prettyBuf(prettyBufS);
+ Exp->getString()->printPretty(prettyBuf, *Context, 0,
+ PrintingPolicy(LangOpts));
+ Preamble += prettyBuf.str();
+ Preamble += ",";
+ Preamble += utostr(Exp->getString()->getByteLength()) + "};\n";
+
+ VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
+ SourceLocation(), &Context->Idents.get(S),
+ strType, 0, SC_Static, SC_None);
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(NewVD, false, strType, VK_LValue,
+ SourceLocation());
+ Expr *Unop = new (Context) UnaryOperator(DRE, UO_AddrOf,
+ Context->getPointerType(DRE->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ // cast to NSConstantString *
+ CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Exp->getType(),
+ CK_CPointerToObjCPointerCast, Unop);
+ ReplaceStmt(Exp, cast);
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return cast;
+}
+
+Stmt *RewriteModernObjC::RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp) {
+ unsigned IntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
+
+ Expr *FlagExp = IntegerLiteral::Create(*Context,
+ llvm::APInt(IntSize, Exp->getValue()),
+ Context->IntTy, Exp->getLocation());
+ CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Context->ObjCBuiltinBoolTy,
+ CK_BitCast, FlagExp);
+ ParenExpr *PE = new (Context) ParenExpr(Exp->getLocation(), Exp->getExprLoc(),
+ cast);
+ ReplaceStmt(Exp, PE);
+ return PE;
+}
+
+Stmt *RewriteModernObjC::RewriteObjCNumericLiteralExpr(ObjCNumericLiteral *Exp) {
+ // synthesize declaration of helper functions needed in this routine.
+ if (!SelGetUidFunctionDecl)
+ SynthSelGetUidFunctionDecl();
+ // use objc_msgSend() for all.
+ if (!MsgSendFunctionDecl)
+ SynthMsgSendFunctionDecl();
+ if (!GetClassFunctionDecl)
+ SynthGetClassFunctionDecl();
+
+ FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
+ SourceLocation StartLoc = Exp->getLocStart();
+ SourceLocation EndLoc = Exp->getLocEnd();
+
+ // Synthesize a call to objc_msgSend().
+ SmallVector<Expr*, 4> MsgExprs;
+ SmallVector<Expr*, 4> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ QualType expType = Exp->getType();
+
+ // Create a call to objc_getClass("NSNumber"). It will be th 1st argument.
+ ObjCInterfaceDecl *Class =
+ expType->getPointeeType()->getAs<ObjCObjectType>()->getInterface();
+
+ IdentifierInfo *clsName = Class->getIdentifier();
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ clsName->getName(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc, EndLoc);
+ MsgExprs.push_back(Cls);
+
+ // Create a call to sel_registerName("numberWithBool:"), etc.
+ // it will be the 2nd argument.
+ SmallVector<Expr*, 4> SelExprs;
+ ObjCMethodDecl *NumericMethod = Exp->getObjCNumericLiteralMethod();
+ SelExprs.push_back(StringLiteral::Create(*Context,
+ NumericMethod->getSelector().getAsString(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
+ &SelExprs[0], SelExprs.size(),
+ StartLoc, EndLoc);
+ MsgExprs.push_back(SelExp);
+
+ // User provided numeric literal is the 3rd, and last, argument.
+ Expr *userExpr = Exp->getNumber();
+ if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
+ QualType type = ICE->getType();
+ const Expr *SubExpr = ICE->IgnoreParenImpCasts();
+ CastKind CK = CK_BitCast;
+ if (SubExpr->getType()->isIntegralType(*Context) && type->isBooleanType())
+ CK = CK_IntegralToBoolean;
+ userExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, userExpr);
+ }
+ MsgExprs.push_back(userExpr);
+
+ SmallVector<QualType, 4> ArgTypes;
+ ArgTypes.push_back(Context->getObjCIdType());
+ ArgTypes.push_back(Context->getObjCSelType());
+ for (ObjCMethodDecl::param_iterator PI = NumericMethod->param_begin(),
+ E = NumericMethod->param_end(); PI != E; ++PI)
+ ArgTypes.push_back((*PI)->getType());
+
+ QualType returnType = Exp->getType();
+ // Get the type, we will need to reference it in a couple spots.
+ QualType msgSendType = MsgSendFlavor->getType();
+
+ // Create a reference to the objc_msgSend() declaration.
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(MsgSendFlavor, false, msgSendType,
+ VK_LValue, SourceLocation());
+
+ CastExpr *cast = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(Context->VoidTy),
+ CK_BitCast, DRE);
+
+ // Now do the "normal" pointer to function cast.
+ QualType castType =
+ getSimpleFunctionType(returnType, &ArgTypes[0], ArgTypes.size(),
+ NumericMethod->isVariadic());
+ castType = Context->getPointerType(castType);
+ cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
+ cast);
+
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
+
+ const FunctionType *FT = msgSendType->getAs<FunctionType>();
+ CallExpr *CE = new (Context) CallExpr(*Context, PE, &MsgExprs[0],
+ MsgExprs.size(),
+ FT->getResultType(), VK_RValue,
+ EndLoc);
+ ReplaceStmt(Exp, CE);
+ return CE;
+}
+
+Stmt *RewriteModernObjC::RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp) {
+ // synthesize declaration of helper functions needed in this routine.
+ if (!SelGetUidFunctionDecl)
+ SynthSelGetUidFunctionDecl();
+ // use objc_msgSend() for all.
+ if (!MsgSendFunctionDecl)
+ SynthMsgSendFunctionDecl();
+ if (!GetClassFunctionDecl)
+ SynthGetClassFunctionDecl();
+
+ FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
+ SourceLocation StartLoc = Exp->getLocStart();
+ SourceLocation EndLoc = Exp->getLocEnd();
+
+ // Build the expression: __NSContainer_literal(int, ...).arr
+ QualType IntQT = Context->IntTy;
+ QualType NSArrayFType =
+ getSimpleFunctionType(Context->VoidTy, &IntQT, 1, true);
+ std::string NSArrayFName("__NSContainer_literal");
+ FunctionDecl *NSArrayFD = SynthBlockInitFunctionDecl(NSArrayFName);
+ DeclRefExpr *NSArrayDRE =
+ new (Context) DeclRefExpr(NSArrayFD, false, NSArrayFType, VK_RValue,
+ SourceLocation());
+
+ SmallVector<Expr*, 16> InitExprs;
+ unsigned NumElements = Exp->getNumElements();
+ unsigned UnsignedIntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
+ Expr *count = IntegerLiteral::Create(*Context,
+ llvm::APInt(UnsignedIntSize, NumElements),
+ Context->UnsignedIntTy, SourceLocation());
+ InitExprs.push_back(count);
+ for (unsigned i = 0; i < NumElements; i++)
+ InitExprs.push_back(Exp->getElement(i));
+ Expr *NSArrayCallExpr =
+ new (Context) CallExpr(*Context, NSArrayDRE, &InitExprs[0], InitExprs.size(),
+ NSArrayFType, VK_LValue, SourceLocation());
+
+ FieldDecl *ARRFD = FieldDecl::Create(*Context, 0, SourceLocation(),
+ SourceLocation(),
+ &Context->Idents.get("arr"),
+ Context->getPointerType(Context->VoidPtrTy), 0,
+ /*BitWidth=*/0, /*Mutable=*/true,
+ /*HasInit=*/false);
+ MemberExpr *ArrayLiteralME =
+ new (Context) MemberExpr(NSArrayCallExpr, false, ARRFD,
+ SourceLocation(),
+ ARRFD->getType(), VK_LValue,
+ OK_Ordinary);
+ QualType ConstIdT = Context->getObjCIdType().withConst();
+ CStyleCastExpr * ArrayLiteralObjects =
+ NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(ConstIdT),
+ CK_BitCast,
+ ArrayLiteralME);
+
+ // Synthesize a call to objc_msgSend().
+ SmallVector<Expr*, 32> MsgExprs;
+ SmallVector<Expr*, 4> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ QualType expType = Exp->getType();
+
+ // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
+ ObjCInterfaceDecl *Class =
+ expType->getPointeeType()->getAs<ObjCObjectType>()->getInterface();
+
+ IdentifierInfo *clsName = Class->getIdentifier();
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ clsName->getName(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc, EndLoc);
+ MsgExprs.push_back(Cls);
+
+ // Create a call to sel_registerName("arrayWithObjects:count:").
+ // it will be the 2nd argument.
+ SmallVector<Expr*, 4> SelExprs;
+ ObjCMethodDecl *ArrayMethod = Exp->getArrayWithObjectsMethod();
+ SelExprs.push_back(StringLiteral::Create(*Context,
+ ArrayMethod->getSelector().getAsString(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
+ &SelExprs[0], SelExprs.size(),
+ StartLoc, EndLoc);
+ MsgExprs.push_back(SelExp);
+
+ // (const id [])objects
+ MsgExprs.push_back(ArrayLiteralObjects);
+
+ // (NSUInteger)cnt
+ Expr *cnt = IntegerLiteral::Create(*Context,
+ llvm::APInt(UnsignedIntSize, NumElements),
+ Context->UnsignedIntTy, SourceLocation());
+ MsgExprs.push_back(cnt);
+
+
+ SmallVector<QualType, 4> ArgTypes;
+ ArgTypes.push_back(Context->getObjCIdType());
+ ArgTypes.push_back(Context->getObjCSelType());
+ for (ObjCMethodDecl::param_iterator PI = ArrayMethod->param_begin(),
+ E = ArrayMethod->param_end(); PI != E; ++PI)
+ ArgTypes.push_back((*PI)->getType());
+
+ QualType returnType = Exp->getType();
+ // Get the type, we will need to reference it in a couple spots.
+ QualType msgSendType = MsgSendFlavor->getType();
+
+ // Create a reference to the objc_msgSend() declaration.
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(MsgSendFlavor, false, msgSendType,
+ VK_LValue, SourceLocation());
+
+ CastExpr *cast = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(Context->VoidTy),
+ CK_BitCast, DRE);
+
+ // Now do the "normal" pointer to function cast.
+ QualType castType =
+ getSimpleFunctionType(returnType, &ArgTypes[0], ArgTypes.size(),
+ ArrayMethod->isVariadic());
+ castType = Context->getPointerType(castType);
+ cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
+ cast);
+
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
+
+ const FunctionType *FT = msgSendType->getAs<FunctionType>();
+ CallExpr *CE = new (Context) CallExpr(*Context, PE, &MsgExprs[0],
+ MsgExprs.size(),
+ FT->getResultType(), VK_RValue,
+ EndLoc);
+ ReplaceStmt(Exp, CE);
+ return CE;
+}
+
+Stmt *RewriteModernObjC::RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp) {
+ // synthesize declaration of helper functions needed in this routine.
+ if (!SelGetUidFunctionDecl)
+ SynthSelGetUidFunctionDecl();
+ // use objc_msgSend() for all.
+ if (!MsgSendFunctionDecl)
+ SynthMsgSendFunctionDecl();
+ if (!GetClassFunctionDecl)
+ SynthGetClassFunctionDecl();
+
+ FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
+ SourceLocation StartLoc = Exp->getLocStart();
+ SourceLocation EndLoc = Exp->getLocEnd();
+
+ // Build the expression: __NSContainer_literal(int, ...).arr
+ QualType IntQT = Context->IntTy;
+ QualType NSDictFType =
+ getSimpleFunctionType(Context->VoidTy, &IntQT, 1, true);
+ std::string NSDictFName("__NSContainer_literal");
+ FunctionDecl *NSDictFD = SynthBlockInitFunctionDecl(NSDictFName);
+ DeclRefExpr *NSDictDRE =
+ new (Context) DeclRefExpr(NSDictFD, false, NSDictFType, VK_RValue,
+ SourceLocation());
+
+ SmallVector<Expr*, 16> KeyExprs;
+ SmallVector<Expr*, 16> ValueExprs;
+
+ unsigned NumElements = Exp->getNumElements();
+ unsigned UnsignedIntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
+ Expr *count = IntegerLiteral::Create(*Context,
+ llvm::APInt(UnsignedIntSize, NumElements),
+ Context->UnsignedIntTy, SourceLocation());
+ KeyExprs.push_back(count);
+ ValueExprs.push_back(count);
+ for (unsigned i = 0; i < NumElements; i++) {
+ ObjCDictionaryElement Element = Exp->getKeyValueElement(i);
+ KeyExprs.push_back(Element.Key);
+ ValueExprs.push_back(Element.Value);
+ }
+
+ // (const id [])objects
+ Expr *NSValueCallExpr =
+ new (Context) CallExpr(*Context, NSDictDRE, &ValueExprs[0], ValueExprs.size(),
+ NSDictFType, VK_LValue, SourceLocation());
+
+ FieldDecl *ARRFD = FieldDecl::Create(*Context, 0, SourceLocation(),
+ SourceLocation(),
+ &Context->Idents.get("arr"),
+ Context->getPointerType(Context->VoidPtrTy), 0,
+ /*BitWidth=*/0, /*Mutable=*/true,
+ /*HasInit=*/false);
+ MemberExpr *DictLiteralValueME =
+ new (Context) MemberExpr(NSValueCallExpr, false, ARRFD,
+ SourceLocation(),
+ ARRFD->getType(), VK_LValue,
+ OK_Ordinary);
+ QualType ConstIdT = Context->getObjCIdType().withConst();
+ CStyleCastExpr * DictValueObjects =
+ NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(ConstIdT),
+ CK_BitCast,
+ DictLiteralValueME);
+ // (const id <NSCopying> [])keys
+ Expr *NSKeyCallExpr =
+ new (Context) CallExpr(*Context, NSDictDRE, &KeyExprs[0], KeyExprs.size(),
+ NSDictFType, VK_LValue, SourceLocation());
+
+ MemberExpr *DictLiteralKeyME =
+ new (Context) MemberExpr(NSKeyCallExpr, false, ARRFD,
+ SourceLocation(),
+ ARRFD->getType(), VK_LValue,
+ OK_Ordinary);
+
+ CStyleCastExpr * DictKeyObjects =
+ NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(ConstIdT),
+ CK_BitCast,
+ DictLiteralKeyME);
+
+
+
+ // Synthesize a call to objc_msgSend().
+ SmallVector<Expr*, 32> MsgExprs;
+ SmallVector<Expr*, 4> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ QualType expType = Exp->getType();
+
+ // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
+ ObjCInterfaceDecl *Class =
+ expType->getPointeeType()->getAs<ObjCObjectType>()->getInterface();
+
+ IdentifierInfo *clsName = Class->getIdentifier();
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ clsName->getName(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc, EndLoc);
+ MsgExprs.push_back(Cls);
+
+ // Create a call to sel_registerName("arrayWithObjects:count:").
+ // it will be the 2nd argument.
+ SmallVector<Expr*, 4> SelExprs;
+ ObjCMethodDecl *DictMethod = Exp->getDictWithObjectsMethod();
+ SelExprs.push_back(StringLiteral::Create(*Context,
+ DictMethod->getSelector().getAsString(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
+ &SelExprs[0], SelExprs.size(),
+ StartLoc, EndLoc);
+ MsgExprs.push_back(SelExp);
+
+ // (const id [])objects
+ MsgExprs.push_back(DictValueObjects);
+
+ // (const id <NSCopying> [])keys
+ MsgExprs.push_back(DictKeyObjects);
+
+ // (NSUInteger)cnt
+ Expr *cnt = IntegerLiteral::Create(*Context,
+ llvm::APInt(UnsignedIntSize, NumElements),
+ Context->UnsignedIntTy, SourceLocation());
+ MsgExprs.push_back(cnt);
+
+
+ SmallVector<QualType, 8> ArgTypes;
+ ArgTypes.push_back(Context->getObjCIdType());
+ ArgTypes.push_back(Context->getObjCSelType());
+ for (ObjCMethodDecl::param_iterator PI = DictMethod->param_begin(),
+ E = DictMethod->param_end(); PI != E; ++PI) {
+ QualType T = (*PI)->getType();
+ if (const PointerType* PT = T->getAs<PointerType>()) {
+ QualType PointeeTy = PT->getPointeeType();
+ convertToUnqualifiedObjCType(PointeeTy);
+ T = Context->getPointerType(PointeeTy);
+ }
+ ArgTypes.push_back(T);
+ }
+
+ QualType returnType = Exp->getType();
+ // Get the type, we will need to reference it in a couple spots.
+ QualType msgSendType = MsgSendFlavor->getType();
+
+ // Create a reference to the objc_msgSend() declaration.
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(MsgSendFlavor, false, msgSendType,
+ VK_LValue, SourceLocation());
+
+ CastExpr *cast = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(Context->VoidTy),
+ CK_BitCast, DRE);
+
+ // Now do the "normal" pointer to function cast.
+ QualType castType =
+ getSimpleFunctionType(returnType, &ArgTypes[0], ArgTypes.size(),
+ DictMethod->isVariadic());
+ castType = Context->getPointerType(castType);
+ cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
+ cast);
+
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
+
+ const FunctionType *FT = msgSendType->getAs<FunctionType>();
+ CallExpr *CE = new (Context) CallExpr(*Context, PE, &MsgExprs[0],
+ MsgExprs.size(),
+ FT->getResultType(), VK_RValue,
+ EndLoc);
+ ReplaceStmt(Exp, CE);
+ return CE;
+}
+
+// struct __rw_objc_super {
+// struct objc_object *object; struct objc_object *superClass;
+// };
+QualType RewriteModernObjC::getSuperStructType() {
+ if (!SuperStructDecl) {
+ SuperStructDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("__rw_objc_super"));
+ QualType FieldTypes[2];
+
+ // struct objc_object *object;
+ FieldTypes[0] = Context->getObjCIdType();
+ // struct objc_object *superClass;
+ FieldTypes[1] = Context->getObjCIdType();
+
+ // Create fields
+ for (unsigned i = 0; i < 2; ++i) {
+ SuperStructDecl->addDecl(FieldDecl::Create(*Context, SuperStructDecl,
+ SourceLocation(),
+ SourceLocation(), 0,
+ FieldTypes[i], 0,
+ /*BitWidth=*/0,
+ /*Mutable=*/false,
+ /*HasInit=*/false));
+ }
+
+ SuperStructDecl->completeDefinition();
+ }
+ return Context->getTagDeclType(SuperStructDecl);
+}
+
+QualType RewriteModernObjC::getConstantStringStructType() {
+ if (!ConstantStringDecl) {
+ ConstantStringDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("__NSConstantStringImpl"));
+ QualType FieldTypes[4];
+
+ // struct objc_object *receiver;
+ FieldTypes[0] = Context->getObjCIdType();
+ // int flags;
+ FieldTypes[1] = Context->IntTy;
+ // char *str;
+ FieldTypes[2] = Context->getPointerType(Context->CharTy);
+ // long length;
+ FieldTypes[3] = Context->LongTy;
+
+ // Create fields
+ for (unsigned i = 0; i < 4; ++i) {
+ ConstantStringDecl->addDecl(FieldDecl::Create(*Context,
+ ConstantStringDecl,
+ SourceLocation(),
+ SourceLocation(), 0,
+ FieldTypes[i], 0,
+ /*BitWidth=*/0,
+ /*Mutable=*/true,
+ /*HasInit=*/false));
+ }
+
+ ConstantStringDecl->completeDefinition();
+ }
+ return Context->getTagDeclType(ConstantStringDecl);
+}
+
+Stmt *RewriteModernObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
+ SourceLocation StartLoc,
+ SourceLocation EndLoc) {
+ if (!SelGetUidFunctionDecl)
+ SynthSelGetUidFunctionDecl();
+ if (!MsgSendFunctionDecl)
+ SynthMsgSendFunctionDecl();
+ if (!MsgSendSuperFunctionDecl)
+ SynthMsgSendSuperFunctionDecl();
+ if (!MsgSendStretFunctionDecl)
+ SynthMsgSendStretFunctionDecl();
+ if (!MsgSendSuperStretFunctionDecl)
+ SynthMsgSendSuperStretFunctionDecl();
+ if (!MsgSendFpretFunctionDecl)
+ SynthMsgSendFpretFunctionDecl();
+ if (!GetClassFunctionDecl)
+ SynthGetClassFunctionDecl();
+ if (!GetSuperClassFunctionDecl)
+ SynthGetSuperClassFunctionDecl();
+ if (!GetMetaClassFunctionDecl)
+ SynthGetMetaClassFunctionDecl();
+
+ // default to objc_msgSend().
+ FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
+ // May need to use objc_msgSend_stret() as well.
+ FunctionDecl *MsgSendStretFlavor = 0;
+ if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
+ QualType resultType = mDecl->getResultType();
+ if (resultType->isRecordType())
+ MsgSendStretFlavor = MsgSendStretFunctionDecl;
+ else if (resultType->isRealFloatingType())
+ MsgSendFlavor = MsgSendFpretFunctionDecl;
+ }
+
+ // Synthesize a call to objc_msgSend().
+ SmallVector<Expr*, 8> MsgExprs;
+ switch (Exp->getReceiverKind()) {
+ case ObjCMessageExpr::SuperClass: {
+ MsgSendFlavor = MsgSendSuperFunctionDecl;
+ if (MsgSendStretFlavor)
+ MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
+ assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
+
+ ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
+
+ SmallVector<Expr*, 4> InitExprs;
+
+ // set the receiver to self, the first argument to all methods.
+ InitExprs.push_back(
+ NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK_BitCast,
+ new (Context) DeclRefExpr(CurMethodDef->getSelfDecl(),
+ false,
+ Context->getObjCIdType(),
+ VK_RValue,
+ SourceLocation()))
+ ); // set the 'receiver'.
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ SmallVector<Expr*, 8> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ ClassDecl->getIdentifier()->getName(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc,
+ EndLoc);
+ // (Class)objc_getClass("CurrentClass")
+ CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
+ Context->getObjCClassType(),
+ CK_BitCast, Cls);
+ ClsExprs.clear();
+ ClsExprs.push_back(ArgExpr);
+ Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl,
+ &ClsExprs[0], ClsExprs.size(),
+ StartLoc, EndLoc);
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ // To turn off a warning, type-cast to 'id'
+ InitExprs.push_back( // set 'super class', using class_getSuperclass().
+ NoTypeInfoCStyleCastExpr(Context,
+ Context->getObjCIdType(),
+ CK_BitCast, Cls));
+ // struct __rw_objc_super
+ QualType superType = getSuperStructType();
+ Expr *SuperRep;
+
+ if (LangOpts.MicrosoftExt) {
+ SynthSuperContructorFunctionDecl();
+ // Simulate a contructor call...
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(SuperContructorFunctionDecl,
+ false, superType, VK_LValue,
+ SourceLocation());
+ SuperRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0],
+ InitExprs.size(),
+ superType, VK_LValue,
+ SourceLocation());
+ // The code for super is a little tricky to prevent collision with
+ // the structure definition in the header. The rewriter has it's own
+ // internal definition (__rw_objc_super) that is uses. This is why
+ // we need the cast below. For example:
+ // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
+ //
+ SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
+ Context->getPointerType(SuperRep->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ SuperRep = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(superType),
+ CK_BitCast, SuperRep);
+ } else {
+ // (struct __rw_objc_super) { <exprs from above> }
+ InitListExpr *ILE =
+ new (Context) InitListExpr(*Context, SourceLocation(),
+ &InitExprs[0], InitExprs.size(),
+ SourceLocation());
+ TypeSourceInfo *superTInfo
+ = Context->getTrivialTypeSourceInfo(superType);
+ SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
+ superType, VK_LValue,
+ ILE, false);
+ // struct __rw_objc_super *
+ SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
+ Context->getPointerType(SuperRep->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ }
+ MsgExprs.push_back(SuperRep);
+ break;
+ }
+
+ case ObjCMessageExpr::Class: {
+ SmallVector<Expr*, 8> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ ObjCInterfaceDecl *Class
+ = Exp->getClassReceiver()->getAs<ObjCObjectType>()->getInterface();
+ IdentifierInfo *clsName = Class->getIdentifier();
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ clsName->getName(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc, EndLoc);
+ MsgExprs.push_back(Cls);
+ break;
+ }
+
+ case ObjCMessageExpr::SuperInstance:{
+ MsgSendFlavor = MsgSendSuperFunctionDecl;
+ if (MsgSendStretFlavor)
+ MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
+ assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
+ ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
+ SmallVector<Expr*, 4> InitExprs;
+
+ InitExprs.push_back(
+ NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK_BitCast,
+ new (Context) DeclRefExpr(CurMethodDef->getSelfDecl(),
+ false,
+ Context->getObjCIdType(),
+ VK_RValue, SourceLocation()))
+ ); // set the 'receiver'.
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ SmallVector<Expr*, 8> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ ClassDecl->getIdentifier()->getName(),
+ StringLiteral::Ascii, false, argType,
+ SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc, EndLoc);
+ // (Class)objc_getClass("CurrentClass")
+ CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
+ Context->getObjCClassType(),
+ CK_BitCast, Cls);
+ ClsExprs.clear();
+ ClsExprs.push_back(ArgExpr);
+ Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl,
+ &ClsExprs[0], ClsExprs.size(),
+ StartLoc, EndLoc);
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ // To turn off a warning, type-cast to 'id'
+ InitExprs.push_back(
+ // set 'super class', using class_getSuperclass().
+ NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK_BitCast, Cls));
+ // struct __rw_objc_super
+ QualType superType = getSuperStructType();
+ Expr *SuperRep;
+
+ if (LangOpts.MicrosoftExt) {
+ SynthSuperContructorFunctionDecl();
+ // Simulate a contructor call...
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(SuperContructorFunctionDecl,
+ false, superType, VK_LValue,
+ SourceLocation());
+ SuperRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0],
+ InitExprs.size(),
+ superType, VK_LValue, SourceLocation());
+ // The code for super is a little tricky to prevent collision with
+ // the structure definition in the header. The rewriter has it's own
+ // internal definition (__rw_objc_super) that is uses. This is why
+ // we need the cast below. For example:
+ // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
+ //
+ SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
+ Context->getPointerType(SuperRep->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ SuperRep = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(superType),
+ CK_BitCast, SuperRep);
+ } else {
+ // (struct __rw_objc_super) { <exprs from above> }
+ InitListExpr *ILE =
+ new (Context) InitListExpr(*Context, SourceLocation(),
+ &InitExprs[0], InitExprs.size(),
+ SourceLocation());
+ TypeSourceInfo *superTInfo
+ = Context->getTrivialTypeSourceInfo(superType);
+ SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
+ superType, VK_RValue, ILE,
+ false);
+ }
+ MsgExprs.push_back(SuperRep);
+ break;
+ }
+
+ case ObjCMessageExpr::Instance: {
+ // Remove all type-casts because it may contain objc-style types; e.g.
+ // Foo<Proto> *.
+ Expr *recExpr = Exp->getInstanceReceiver();
+ while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(recExpr))
+ recExpr = CE->getSubExpr();
+ CastKind CK = recExpr->getType()->isObjCObjectPointerType()
+ ? CK_BitCast : recExpr->getType()->isBlockPointerType()
+ ? CK_BlockPointerToObjCPointerCast
+ : CK_CPointerToObjCPointerCast;
+
+ recExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK, recExpr);
+ MsgExprs.push_back(recExpr);
+ break;
+ }
+ }
+
+ // Create a call to sel_registerName("selName"), it will be the 2nd argument.
+ SmallVector<Expr*, 8> SelExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ SelExprs.push_back(StringLiteral::Create(*Context,
+ Exp->getSelector().getAsString(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
+ &SelExprs[0], SelExprs.size(),
+ StartLoc,
+ EndLoc);
+ MsgExprs.push_back(SelExp);
+
+ // Now push any user supplied arguments.
+ for (unsigned i = 0; i < Exp->getNumArgs(); i++) {
+ Expr *userExpr = Exp->getArg(i);
+ // Make all implicit casts explicit...ICE comes in handy:-)
+ if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
+ // Reuse the ICE type, it is exactly what the doctor ordered.
+ QualType type = ICE->getType();
+ if (needToScanForQualifiers(type))
+ type = Context->getObjCIdType();
+ // Make sure we convert "type (^)(...)" to "type (*)(...)".
+ (void)convertBlockPointerToFunctionPointer(type);
+ const Expr *SubExpr = ICE->IgnoreParenImpCasts();
+ CastKind CK;
+ if (SubExpr->getType()->isIntegralType(*Context) &&
+ type->isBooleanType()) {
+ CK = CK_IntegralToBoolean;
+ } else if (type->isObjCObjectPointerType()) {
+ if (SubExpr->getType()->isBlockPointerType()) {
+ CK = CK_BlockPointerToObjCPointerCast;
+ } else if (SubExpr->getType()->isPointerType()) {
+ CK = CK_CPointerToObjCPointerCast;
+ } else {
+ CK = CK_BitCast;
+ }
+ } else {
+ CK = CK_BitCast;
+ }
+
+ userExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, userExpr);
+ }
+ // Make id<P...> cast into an 'id' cast.
+ else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(userExpr)) {
+ if (CE->getType()->isObjCQualifiedIdType()) {
+ while ((CE = dyn_cast<CStyleCastExpr>(userExpr)))
+ userExpr = CE->getSubExpr();
+ CastKind CK;
+ if (userExpr->getType()->isIntegralType(*Context)) {
+ CK = CK_IntegralToPointer;
+ } else if (userExpr->getType()->isBlockPointerType()) {
+ CK = CK_BlockPointerToObjCPointerCast;
+ } else if (userExpr->getType()->isPointerType()) {
+ CK = CK_CPointerToObjCPointerCast;
+ } else {
+ CK = CK_BitCast;
+ }
+ userExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK, userExpr);
+ }
+ }
+ MsgExprs.push_back(userExpr);
+ // We've transferred the ownership to MsgExprs. For now, we *don't* null
+ // out the argument in the original expression (since we aren't deleting
+ // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
+ //Exp->setArg(i, 0);
+ }
+ // Generate the funky cast.
+ CastExpr *cast;
+ SmallVector<QualType, 8> ArgTypes;
+ QualType returnType;
+
+ // Push 'id' and 'SEL', the 2 implicit arguments.
+ if (MsgSendFlavor == MsgSendSuperFunctionDecl)
+ ArgTypes.push_back(Context->getPointerType(getSuperStructType()));
+ else
+ ArgTypes.push_back(Context->getObjCIdType());
+ ArgTypes.push_back(Context->getObjCSelType());
+ if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
+ // Push any user argument types.
+ for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
+ E = OMD->param_end(); PI != E; ++PI) {
+ QualType t = (*PI)->getType()->isObjCQualifiedIdType()
+ ? Context->getObjCIdType()
+ : (*PI)->getType();
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ (void)convertBlockPointerToFunctionPointer(t);
+ ArgTypes.push_back(t);
+ }
+ returnType = Exp->getType();
+ convertToUnqualifiedObjCType(returnType);
+ (void)convertBlockPointerToFunctionPointer(returnType);
+ } else {
+ returnType = Context->getObjCIdType();
+ }
+ // Get the type, we will need to reference it in a couple spots.
+ QualType msgSendType = MsgSendFlavor->getType();
+
+ // Create a reference to the objc_msgSend() declaration.
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(MsgSendFlavor, false, msgSendType,
+ VK_LValue, SourceLocation());
+
+ // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
+ // If we don't do this cast, we get the following bizarre warning/note:
+ // xx.m:13: warning: function called through a non-compatible type
+ // xx.m:13: note: if this code is reached, the program will abort
+ cast = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(Context->VoidTy),
+ CK_BitCast, DRE);
+
+ // Now do the "normal" pointer to function cast.
+ QualType castType =
+ getSimpleFunctionType(returnType, &ArgTypes[0], ArgTypes.size(),
+ // If we don't have a method decl, force a variadic cast.
+ Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : true);
+ castType = Context->getPointerType(castType);
+ cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
+ cast);
+
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
+
+ const FunctionType *FT = msgSendType->getAs<FunctionType>();
+ CallExpr *CE = new (Context) CallExpr(*Context, PE, &MsgExprs[0],
+ MsgExprs.size(),
+ FT->getResultType(), VK_RValue,
+ EndLoc);
+ Stmt *ReplacingStmt = CE;
+ if (MsgSendStretFlavor) {
+ // We have the method which returns a struct/union. Must also generate
+ // call to objc_msgSend_stret and hang both varieties on a conditional
+ // expression which dictate which one to envoke depending on size of
+ // method's return type.
+
+ // Create a reference to the objc_msgSend_stret() declaration.
+ DeclRefExpr *STDRE = new (Context) DeclRefExpr(MsgSendStretFlavor,
+ false, msgSendType,
+ VK_LValue, SourceLocation());
+ // Need to cast objc_msgSend_stret to "void *" (see above comment).
+ cast = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(Context->VoidTy),
+ CK_BitCast, STDRE);
+ // Now do the "normal" pointer to function cast.
+ castType = getSimpleFunctionType(returnType, &ArgTypes[0], ArgTypes.size(),
+ Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : false);
+ castType = Context->getPointerType(castType);
+ cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
+ cast);
+
+ // Don't forget the parens to enforce the proper binding.
+ PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), cast);
+
+ FT = msgSendType->getAs<FunctionType>();
+ CallExpr *STCE = new (Context) CallExpr(*Context, PE, &MsgExprs[0],
+ MsgExprs.size(),
+ FT->getResultType(), VK_RValue,
+ SourceLocation());
+
+ // Build sizeof(returnType)
+ UnaryExprOrTypeTraitExpr *sizeofExpr =
+ new (Context) UnaryExprOrTypeTraitExpr(UETT_SizeOf,
+ Context->getTrivialTypeSourceInfo(returnType),
+ Context->getSizeType(), SourceLocation(),
+ SourceLocation());
+ // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
+ // FIXME: Value of 8 is base on ppc32/x86 ABI for the most common cases.
+ // For X86 it is more complicated and some kind of target specific routine
+ // is needed to decide what to do.
+ unsigned IntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
+ IntegerLiteral *limit = IntegerLiteral::Create(*Context,
+ llvm::APInt(IntSize, 8),
+ Context->IntTy,
+ SourceLocation());
+ BinaryOperator *lessThanExpr =
+ new (Context) BinaryOperator(sizeofExpr, limit, BO_LE, Context->IntTy,
+ VK_RValue, OK_Ordinary, SourceLocation());
+ // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
+ ConditionalOperator *CondExpr =
+ new (Context) ConditionalOperator(lessThanExpr,
+ SourceLocation(), CE,
+ SourceLocation(), STCE,
+ returnType, VK_RValue, OK_Ordinary);
+ ReplacingStmt = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
+ CondExpr);
+ }
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return ReplacingStmt;
+}
+
+Stmt *RewriteModernObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
+ Stmt *ReplacingStmt = SynthMessageExpr(Exp, Exp->getLocStart(),
+ Exp->getLocEnd());
+
+ // Now do the actual rewrite.
+ ReplaceStmt(Exp, ReplacingStmt);
+
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return ReplacingStmt;
+}
+
+// typedef struct objc_object Protocol;
+QualType RewriteModernObjC::getProtocolType() {
+ if (!ProtocolTypeDecl) {
+ TypeSourceInfo *TInfo
+ = Context->getTrivialTypeSourceInfo(Context->getObjCIdType());
+ ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("Protocol"),
+ TInfo);
+ }
+ return Context->getTypeDeclType(ProtocolTypeDecl);
+}
+
+/// RewriteObjCProtocolExpr - Rewrite a protocol expression into
+/// a synthesized/forward data reference (to the protocol's metadata).
+/// The forward references (and metadata) are generated in
+/// RewriteModernObjC::HandleTranslationUnit().
+Stmt *RewriteModernObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
+ std::string Name = "_OBJC_PROTOCOL_REFERENCE_$_" +
+ Exp->getProtocol()->getNameAsString();
+ IdentifierInfo *ID = &Context->Idents.get(Name);
+ VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
+ SourceLocation(), ID, getProtocolType(), 0,
+ SC_Extern, SC_None);
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(VD, false, getProtocolType(),
+ VK_LValue, SourceLocation());
+ Expr *DerefExpr = new (Context) UnaryOperator(DRE, UO_AddrOf,
+ Context->getPointerType(DRE->getType()),
+ VK_RValue, OK_Ordinary, SourceLocation());
+ CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, DerefExpr->getType(),
+ CK_BitCast,
+ DerefExpr);
+ ReplaceStmt(Exp, castExpr);
+ ProtocolExprDecls.insert(Exp->getProtocol()->getCanonicalDecl());
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return castExpr;
+
+}
+
+bool RewriteModernObjC::BufferContainsPPDirectives(const char *startBuf,
+ const char *endBuf) {
+ while (startBuf < endBuf) {
+ if (*startBuf == '#') {
+ // Skip whitespace.
+ for (++startBuf; startBuf[0] == ' ' || startBuf[0] == '\t'; ++startBuf)
+ ;
+ if (!strncmp(startBuf, "if", strlen("if")) ||
+ !strncmp(startBuf, "ifdef", strlen("ifdef")) ||
+ !strncmp(startBuf, "ifndef", strlen("ifndef")) ||
+ !strncmp(startBuf, "define", strlen("define")) ||
+ !strncmp(startBuf, "undef", strlen("undef")) ||
+ !strncmp(startBuf, "else", strlen("else")) ||
+ !strncmp(startBuf, "elif", strlen("elif")) ||
+ !strncmp(startBuf, "endif", strlen("endif")) ||
+ !strncmp(startBuf, "pragma", strlen("pragma")) ||
+ !strncmp(startBuf, "include", strlen("include")) ||
+ !strncmp(startBuf, "import", strlen("import")) ||
+ !strncmp(startBuf, "include_next", strlen("include_next")))
+ return true;
+ }
+ startBuf++;
+ }
+ return false;
+}
+
+/// RewriteObjCFieldDeclType - This routine rewrites a type into the buffer.
+/// It handles elaborated types, as well as enum types in the process.
+bool RewriteModernObjC::RewriteObjCFieldDeclType(QualType &Type,
+ std::string &Result) {
+ if (Type->isArrayType()) {
+ QualType ElemTy = Context->getBaseElementType(Type);
+ return RewriteObjCFieldDeclType(ElemTy, Result);
+ }
+ else if (Type->isRecordType()) {
+ RecordDecl *RD = Type->getAs<RecordType>()->getDecl();
+ if (RD->isCompleteDefinition()) {
+ if (RD->isStruct())
+ Result += "\n\tstruct ";
+ else if (RD->isUnion())
+ Result += "\n\tunion ";
+ else
+ assert(false && "class not allowed as an ivar type");
+
+ Result += RD->getName();
+ if (TagsDefinedInIvarDecls.count(RD)) {
+ // This struct is already defined. Do not write its definition again.
+ Result += " ";
+ return true;
+ }
+ TagsDefinedInIvarDecls.insert(RD);
+ Result += " {\n";
+ for (RecordDecl::field_iterator i = RD->field_begin(),
+ e = RD->field_end(); i != e; ++i) {
+ FieldDecl *FD = *i;
+ RewriteObjCFieldDecl(FD, Result);
+ }
+ Result += "\t} ";
+ return true;
+ }
+ }
+ else if (Type->isEnumeralType()) {
+ EnumDecl *ED = Type->getAs<EnumType>()->getDecl();
+ if (ED->isCompleteDefinition()) {
+ Result += "\n\tenum ";
+ Result += ED->getName();
+ if (TagsDefinedInIvarDecls.count(ED)) {
+ // This enum is already defined. Do not write its definition again.
+ Result += " ";
+ return true;
+ }
+ TagsDefinedInIvarDecls.insert(ED);
+
+ Result += " {\n";
+ for (EnumDecl::enumerator_iterator EC = ED->enumerator_begin(),
+ ECEnd = ED->enumerator_end(); EC != ECEnd; ++EC) {
+ Result += "\t"; Result += EC->getName(); Result += " = ";
+ llvm::APSInt Val = EC->getInitVal();
+ Result += Val.toString(10);
+ Result += ",\n";
+ }
+ Result += "\t} ";
+ return true;
+ }
+ }
+
+ Result += "\t";
+ convertObjCTypeToCStyleType(Type);
+ return false;
+}
+
+
+/// RewriteObjCFieldDecl - This routine rewrites a field into the buffer.
+/// It handles elaborated types, as well as enum types in the process.
+void RewriteModernObjC::RewriteObjCFieldDecl(FieldDecl *fieldDecl,
+ std::string &Result) {
+ QualType Type = fieldDecl->getType();
+ std::string Name = fieldDecl->getNameAsString();
+
+ bool EleboratedType = RewriteObjCFieldDeclType(Type, Result);
+ if (!EleboratedType)
+ Type.getAsStringInternal(Name, Context->getPrintingPolicy());
+ Result += Name;
+ if (fieldDecl->isBitField()) {
+ Result += " : "; Result += utostr(fieldDecl->getBitWidthValue(*Context));
+ }
+ else if (EleboratedType && Type->isArrayType()) {
+ CanQualType CType = Context->getCanonicalType(Type);
+ while (isa<ArrayType>(CType)) {
+ if (const ConstantArrayType *CAT = Context->getAsConstantArrayType(CType)) {
+ Result += "[";
+ llvm::APInt Dim = CAT->getSize();
+ Result += utostr(Dim.getZExtValue());
+ Result += "]";
+ }
+ CType = CType->getAs<ArrayType>()->getElementType();
+ }
+ }
+
+ Result += ";\n";
+}
+
+/// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
+/// an objective-c class with ivars.
+void RewriteModernObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
+ std::string &Result) {
+ assert(CDecl && "Class missing in SynthesizeObjCInternalStruct");
+ assert(CDecl->getName() != "" &&
+ "Name missing in SynthesizeObjCInternalStruct");
+ ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
+ SmallVector<ObjCIvarDecl *, 8> IVars;
+ for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
+ IVD; IVD = IVD->getNextIvar())
+ IVars.push_back(IVD);
+
+ SourceLocation LocStart = CDecl->getLocStart();
+ SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+
+ // If no ivars and no root or if its root, directly or indirectly,
+ // have no ivars (thus not synthesized) then no need to synthesize this class.
+ if ((!CDecl->isThisDeclarationADefinition() || IVars.size() == 0) &&
+ (!RCDecl || !ObjCSynthesizedStructs.count(RCDecl))) {
+ endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
+ ReplaceText(LocStart, endBuf-startBuf, Result);
+ return;
+ }
+
+ Result += "\nstruct ";
+ Result += CDecl->getNameAsString();
+ Result += "_IMPL {\n";
+
+ if (RCDecl && ObjCSynthesizedStructs.count(RCDecl)) {
+ Result += "\tstruct "; Result += RCDecl->getNameAsString();
+ Result += "_IMPL "; Result += RCDecl->getNameAsString();
+ Result += "_IVARS;\n";
+ }
+ TagsDefinedInIvarDecls.clear();
+ for (unsigned i = 0, e = IVars.size(); i < e; i++)
+ RewriteObjCFieldDecl(IVars[i], Result);
+
+ Result += "};\n";
+ endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
+ ReplaceText(LocStart, endBuf-startBuf, Result);
+ // Mark this struct as having been generated.
+ if (!ObjCSynthesizedStructs.insert(CDecl))
+ llvm_unreachable("struct already synthesize- RewriteObjCInternalStruct");
+}
+
+static void WriteInternalIvarName(ObjCInterfaceDecl *IDecl,
+ ObjCIvarDecl *IvarDecl, std::string &Result) {
+ Result += "OBJC_IVAR_$_";
+ Result += IDecl->getName();
+ Result += "$";
+ Result += IvarDecl->getName();
+}
+
+/// RewriteIvarOffsetSymbols - Rewrite ivar offset symbols of those ivars which
+/// have been referenced in an ivar access expression.
+void RewriteModernObjC::RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
+ std::string &Result) {
+ // write out ivar offset symbols which have been referenced in an ivar
+ // access expression.
+ llvm::SmallPtrSet<ObjCIvarDecl *, 8> Ivars = ReferencedIvars[CDecl];
+ if (Ivars.empty())
+ return;
+ for (llvm::SmallPtrSet<ObjCIvarDecl *, 8>::iterator i = Ivars.begin(),
+ e = Ivars.end(); i != e; i++) {
+ ObjCIvarDecl *IvarDecl = (*i);
+ Result += "\n";
+ if (LangOpts.MicrosoftExt)
+ Result += "__declspec(allocate(\".objc_ivar$B\")) ";
+ Result += "extern \"C\" ";
+ if (LangOpts.MicrosoftExt &&
+ IvarDecl->getAccessControl() != ObjCIvarDecl::Private &&
+ IvarDecl->getAccessControl() != ObjCIvarDecl::Package)
+ Result += "__declspec(dllimport) ";
+
+ Result += "unsigned long ";
+ WriteInternalIvarName(CDecl, IvarDecl, Result);
+ Result += ";";
+ }
+}
+
+//===----------------------------------------------------------------------===//
+// Meta Data Emission
+//===----------------------------------------------------------------------===//
+
+
+/// RewriteImplementations - This routine rewrites all method implementations
+/// and emits meta-data.
+
+void RewriteModernObjC::RewriteImplementations() {
+ int ClsDefCount = ClassImplementation.size();
+ int CatDefCount = CategoryImplementation.size();
+
+ // Rewrite implemented methods
+ for (int i = 0; i < ClsDefCount; i++) {
+ ObjCImplementationDecl *OIMP = ClassImplementation[i];
+ ObjCInterfaceDecl *CDecl = OIMP->getClassInterface();
+ if (CDecl->isImplicitInterfaceDecl())
+ assert(false &&
+ "Legacy implicit interface rewriting not supported in moder abi");
+ RewriteImplementationDecl(OIMP);
+ }
+
+ for (int i = 0; i < CatDefCount; i++) {
+ ObjCCategoryImplDecl *CIMP = CategoryImplementation[i];
+ ObjCInterfaceDecl *CDecl = CIMP->getClassInterface();
+ if (CDecl->isImplicitInterfaceDecl())
+ assert(false &&
+ "Legacy implicit interface rewriting not supported in moder abi");
+ RewriteImplementationDecl(CIMP);
+ }
+}
+
+void RewriteModernObjC::RewriteByRefString(std::string &ResultStr,
+ const std::string &Name,
+ ValueDecl *VD, bool def) {
+ assert(BlockByRefDeclNo.count(VD) &&
+ "RewriteByRefString: ByRef decl missing");
+ if (def)
+ ResultStr += "struct ";
+ ResultStr += "__Block_byref_" + Name +
+ "_" + utostr(BlockByRefDeclNo[VD]) ;
+}
+
+static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
+ if (VarDecl *Var = dyn_cast<VarDecl>(VD))
+ return (Var->isFunctionOrMethodVarDecl() && !Var->hasLocalStorage());
+ return false;
+}
+
+std::string RewriteModernObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
+ StringRef funcName,
+ std::string Tag) {
+ const FunctionType *AFT = CE->getFunctionType();
+ QualType RT = AFT->getResultType();
+ std::string StructRef = "struct " + Tag;
+ std::string S = "static " + RT.getAsString(Context->getPrintingPolicy()) + " __" +
+ funcName.str() + "_block_func_" + utostr(i);
+
+ BlockDecl *BD = CE->getBlockDecl();
+
+ if (isa<FunctionNoProtoType>(AFT)) {
+ // No user-supplied arguments. Still need to pass in a pointer to the
+ // block (to reference imported block decl refs).
+ S += "(" + StructRef + " *__cself)";
+ } else if (BD->param_empty()) {
+ S += "(" + StructRef + " *__cself)";
+ } else {
+ const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
+ assert(FT && "SynthesizeBlockFunc: No function proto");
+ S += '(';
+ // first add the implicit argument.
+ S += StructRef + " *__cself, ";
+ std::string ParamStr;
+ for (BlockDecl::param_iterator AI = BD->param_begin(),
+ E = BD->param_end(); AI != E; ++AI) {
+ if (AI != BD->param_begin()) S += ", ";
+ ParamStr = (*AI)->getNameAsString();
+ QualType QT = (*AI)->getType();
+ (void)convertBlockPointerToFunctionPointer(QT);
+ QT.getAsStringInternal(ParamStr, Context->getPrintingPolicy());
+ S += ParamStr;
+ }
+ if (FT->isVariadic()) {
+ if (!BD->param_empty()) S += ", ";
+ S += "...";
+ }
+ S += ')';
+ }
+ S += " {\n";
+
+ // Create local declarations to avoid rewriting all closure decl ref exprs.
+ // First, emit a declaration for all "by ref" decls.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ S += " ";
+ std::string Name = (*I)->getNameAsString();
+ std::string TypeString;
+ RewriteByRefString(TypeString, Name, (*I));
+ TypeString += " *";
+ Name = TypeString + Name;
+ S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
+ }
+ // Next, emit a declaration for all "by copy" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
+ E = BlockByCopyDecls.end(); I != E; ++I) {
+ S += " ";
+ // Handle nested closure invocation. For example:
+ //
+ // void (^myImportedClosure)(void);
+ // myImportedClosure = ^(void) { setGlobalInt(x + y); };
+ //
+ // void (^anotherClosure)(void);
+ // anotherClosure = ^(void) {
+ // myImportedClosure(); // import and invoke the closure
+ // };
+ //
+ if (isTopLevelBlockPointerType((*I)->getType())) {
+ RewriteBlockPointerTypeVariable(S, (*I));
+ S += " = (";
+ RewriteBlockPointerType(S, (*I)->getType());
+ S += ")";
+ S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
+ }
+ else {
+ std::string Name = (*I)->getNameAsString();
+ QualType QT = (*I)->getType();
+ if (HasLocalVariableExternalStorage(*I))
+ QT = Context->getPointerType(QT);
+ QT.getAsStringInternal(Name, Context->getPrintingPolicy());
+ S += Name + " = __cself->" +
+ (*I)->getNameAsString() + "; // bound by copy\n";
+ }
+ }
+ std::string RewrittenStr = RewrittenBlockExprs[CE];
+ const char *cstr = RewrittenStr.c_str();
+ while (*cstr++ != '{') ;
+ S += cstr;
+ S += "\n";
+ return S;
+}
+
+std::string RewriteModernObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
+ StringRef funcName,
+ std::string Tag) {
+ std::string StructRef = "struct " + Tag;
+ std::string S = "static void __";
+
+ S += funcName;
+ S += "_block_copy_" + utostr(i);
+ S += "(" + StructRef;
+ S += "*dst, " + StructRef;
+ S += "*src) {";
+ for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
+ E = ImportedBlockDecls.end(); I != E; ++I) {
+ ValueDecl *VD = (*I);
+ S += "_Block_object_assign((void*)&dst->";
+ S += (*I)->getNameAsString();
+ S += ", (void*)src->";
+ S += (*I)->getNameAsString();
+ if (BlockByRefDeclsPtrSet.count((*I)))
+ S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
+ else if (VD->getType()->isBlockPointerType())
+ S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
+ else
+ S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
+ }
+ S += "}\n";
+
+ S += "\nstatic void __";
+ S += funcName;
+ S += "_block_dispose_" + utostr(i);
+ S += "(" + StructRef;
+ S += "*src) {";
+ for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
+ E = ImportedBlockDecls.end(); I != E; ++I) {
+ ValueDecl *VD = (*I);
+ S += "_Block_object_dispose((void*)src->";
+ S += (*I)->getNameAsString();
+ if (BlockByRefDeclsPtrSet.count((*I)))
+ S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
+ else if (VD->getType()->isBlockPointerType())
+ S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
+ else
+ S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
+ }
+ S += "}\n";
+ return S;
+}
+
+std::string RewriteModernObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
+ std::string Desc) {
+ std::string S = "\nstruct " + Tag;
+ std::string Constructor = " " + Tag;
+
+ S += " {\n struct __block_impl impl;\n";
+ S += " struct " + Desc;
+ S += "* Desc;\n";
+
+ Constructor += "(void *fp, "; // Invoke function pointer.
+ Constructor += "struct " + Desc; // Descriptor pointer.
+ Constructor += " *desc";
+
+ if (BlockDeclRefs.size()) {
+ // Output all "by copy" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
+ E = BlockByCopyDecls.end(); I != E; ++I) {
+ S += " ";
+ std::string FieldName = (*I)->getNameAsString();
+ std::string ArgName = "_" + FieldName;
+ // Handle nested closure invocation. For example:
+ //
+ // void (^myImportedBlock)(void);
+ // myImportedBlock = ^(void) { setGlobalInt(x + y); };
+ //
+ // void (^anotherBlock)(void);
+ // anotherBlock = ^(void) {
+ // myImportedBlock(); // import and invoke the closure
+ // };
+ //
+ if (isTopLevelBlockPointerType((*I)->getType())) {
+ S += "struct __block_impl *";
+ Constructor += ", void *" + ArgName;
+ } else {
+ QualType QT = (*I)->getType();
+ if (HasLocalVariableExternalStorage(*I))
+ QT = Context->getPointerType(QT);
+ QT.getAsStringInternal(FieldName, Context->getPrintingPolicy());
+ QT.getAsStringInternal(ArgName, Context->getPrintingPolicy());
+ Constructor += ", " + ArgName;
+ }
+ S += FieldName + ";\n";
+ }
+ // Output all "by ref" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ S += " ";
+ std::string FieldName = (*I)->getNameAsString();
+ std::string ArgName = "_" + FieldName;
+ {
+ std::string TypeString;
+ RewriteByRefString(TypeString, FieldName, (*I));
+ TypeString += " *";
+ FieldName = TypeString + FieldName;
+ ArgName = TypeString + ArgName;
+ Constructor += ", " + ArgName;
+ }
+ S += FieldName + "; // by ref\n";
+ }
+ // Finish writing the constructor.
+ Constructor += ", int flags=0)";
+ // Initialize all "by copy" arguments.
+ bool firsTime = true;
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
+ E = BlockByCopyDecls.end(); I != E; ++I) {
+ std::string Name = (*I)->getNameAsString();
+ if (firsTime) {
+ Constructor += " : ";
+ firsTime = false;
+ }
+ else
+ Constructor += ", ";
+ if (isTopLevelBlockPointerType((*I)->getType()))
+ Constructor += Name + "((struct __block_impl *)_" + Name + ")";
+ else
+ Constructor += Name + "(_" + Name + ")";
+ }
+ // Initialize all "by ref" arguments.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ std::string Name = (*I)->getNameAsString();
+ if (firsTime) {
+ Constructor += " : ";
+ firsTime = false;
+ }
+ else
+ Constructor += ", ";
+ Constructor += Name + "(_" + Name + "->__forwarding)";
+ }
+
+ Constructor += " {\n";
+ if (GlobalVarDecl)
+ Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
+ else
+ Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
+ Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
+
+ Constructor += " Desc = desc;\n";
+ } else {
+ // Finish writing the constructor.
+ Constructor += ", int flags=0) {\n";
+ if (GlobalVarDecl)
+ Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
+ else
+ Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
+ Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
+ Constructor += " Desc = desc;\n";
+ }
+ Constructor += " ";
+ Constructor += "}\n";
+ S += Constructor;
+ S += "};\n";
+ return S;
+}
+
+std::string RewriteModernObjC::SynthesizeBlockDescriptor(std::string DescTag,
+ std::string ImplTag, int i,
+ StringRef FunName,
+ unsigned hasCopy) {
+ std::string S = "\nstatic struct " + DescTag;
+
+ S += " {\n unsigned long reserved;\n";
+ S += " unsigned long Block_size;\n";
+ if (hasCopy) {
+ S += " void (*copy)(struct ";
+ S += ImplTag; S += "*, struct ";
+ S += ImplTag; S += "*);\n";
+
+ S += " void (*dispose)(struct ";
+ S += ImplTag; S += "*);\n";
+ }
+ S += "} ";
+
+ S += DescTag + "_DATA = { 0, sizeof(struct ";
+ S += ImplTag + ")";
+ if (hasCopy) {
+ S += ", __" + FunName.str() + "_block_copy_" + utostr(i);
+ S += ", __" + FunName.str() + "_block_dispose_" + utostr(i);
+ }
+ S += "};\n";
+ return S;
+}
+
+/// getFunctionSourceLocation - returns start location of a function
+/// definition. Complication arises when function has declared as
+/// extern "C" or extern "C" {...}
+static SourceLocation getFunctionSourceLocation (FunctionDecl *FD) {
+ if (!FD->isExternC() || FD->isMain())
+ return FD->getTypeSpecStartLoc();
+ const DeclContext *DC = FD->getDeclContext();
+ if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(DC)) {
+ SourceLocation BodyRBrace = LSD->getRBraceLoc();
+ // if it is extern "C" {...}, return function decl's own location.
+ if (BodyRBrace.isValid())
+ return FD->getTypeSpecStartLoc();
+ return LSD->getExternLoc();
+ }
+ return FD->getTypeSpecStartLoc();
+}
+
+void RewriteModernObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
+ StringRef FunName) {
+ bool RewriteSC = (GlobalVarDecl &&
+ !Blocks.empty() &&
+ GlobalVarDecl->getStorageClass() == SC_Static &&
+ GlobalVarDecl->getType().getCVRQualifiers());
+ if (RewriteSC) {
+ std::string SC(" void __");
+ SC += GlobalVarDecl->getNameAsString();
+ SC += "() {}";
+ InsertText(FunLocStart, SC);
+ }
+
+ // Insert closures that were part of the function.
+ for (unsigned i = 0, count=0; i < Blocks.size(); i++) {
+ CollectBlockDeclRefInfo(Blocks[i]);
+ // Need to copy-in the inner copied-in variables not actually used in this
+ // block.
+ for (int j = 0; j < InnerDeclRefsCount[i]; j++) {
+ DeclRefExpr *Exp = InnerDeclRefs[count++];
+ ValueDecl *VD = Exp->getDecl();
+ BlockDeclRefs.push_back(Exp);
+ if (!VD->hasAttr<BlocksAttr>()) {
+ if (!BlockByCopyDeclsPtrSet.count(VD)) {
+ BlockByCopyDeclsPtrSet.insert(VD);
+ BlockByCopyDecls.push_back(VD);
+ }
+ continue;
+ }
+
+ if (!BlockByRefDeclsPtrSet.count(VD)) {
+ BlockByRefDeclsPtrSet.insert(VD);
+ BlockByRefDecls.push_back(VD);
+ }
+
+ // imported objects in the inner blocks not used in the outer
+ // blocks must be copied/disposed in the outer block as well.
+ if (VD->getType()->isObjCObjectPointerType() ||
+ VD->getType()->isBlockPointerType())
+ ImportedBlockDecls.insert(VD);
+ }
+
+ std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(i);
+ std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(i);
+
+ std::string CI = SynthesizeBlockImpl(Blocks[i], ImplTag, DescTag);
+
+ InsertText(FunLocStart, CI);
+
+ std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, ImplTag);
+
+ InsertText(FunLocStart, CF);
+
+ if (ImportedBlockDecls.size()) {
+ std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, ImplTag);
+ InsertText(FunLocStart, HF);
+ }
+ std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
+ ImportedBlockDecls.size() > 0);
+ InsertText(FunLocStart, BD);
+
+ BlockDeclRefs.clear();
+ BlockByRefDecls.clear();
+ BlockByRefDeclsPtrSet.clear();
+ BlockByCopyDecls.clear();
+ BlockByCopyDeclsPtrSet.clear();
+ ImportedBlockDecls.clear();
+ }
+ if (RewriteSC) {
+ // Must insert any 'const/volatile/static here. Since it has been
+ // removed as result of rewriting of block literals.
+ std::string SC;
+ if (GlobalVarDecl->getStorageClass() == SC_Static)
+ SC = "static ";
+ if (GlobalVarDecl->getType().isConstQualified())
+ SC += "const ";
+ if (GlobalVarDecl->getType().isVolatileQualified())
+ SC += "volatile ";
+ if (GlobalVarDecl->getType().isRestrictQualified())
+ SC += "restrict ";
+ InsertText(FunLocStart, SC);
+ }
+ if (GlobalConstructionExp) {
+ // extra fancy dance for global literal expression.
+
+ // Always the latest block expression on the block stack.
+ std::string Tag = "__";
+ Tag += FunName;
+ Tag += "_block_impl_";
+ Tag += utostr(Blocks.size()-1);
+ std::string globalBuf = "static ";
+ globalBuf += Tag; globalBuf += " ";
+ std::string SStr;
+
+ llvm::raw_string_ostream constructorExprBuf(SStr);
+ GlobalConstructionExp->printPretty(constructorExprBuf, *Context, 0,
+ PrintingPolicy(LangOpts));
+ globalBuf += constructorExprBuf.str();
+ globalBuf += ";\n";
+ InsertText(FunLocStart, globalBuf);
+ GlobalConstructionExp = 0;
+ }
+
+ Blocks.clear();
+ InnerDeclRefsCount.clear();
+ InnerDeclRefs.clear();
+ RewrittenBlockExprs.clear();
+}
+
+void RewriteModernObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
+ SourceLocation FunLocStart = getFunctionSourceLocation(FD);
+ StringRef FuncName = FD->getName();
+
+ SynthesizeBlockLiterals(FunLocStart, FuncName);
+}
+
+static void BuildUniqueMethodName(std::string &Name,
+ ObjCMethodDecl *MD) {
+ ObjCInterfaceDecl *IFace = MD->getClassInterface();
+ Name = IFace->getName();
+ Name += "__" + MD->getSelector().getAsString();
+ // Convert colons to underscores.
+ std::string::size_type loc = 0;
+ while ((loc = Name.find(":", loc)) != std::string::npos)
+ Name.replace(loc, 1, "_");
+}
+
+void RewriteModernObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
+ //fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
+ //SourceLocation FunLocStart = MD->getLocStart();
+ SourceLocation FunLocStart = MD->getLocStart();
+ std::string FuncName;
+ BuildUniqueMethodName(FuncName, MD);
+ SynthesizeBlockLiterals(FunLocStart, FuncName);
+}
+
+void RewriteModernObjC::GetBlockDeclRefExprs(Stmt *S) {
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI))
+ GetBlockDeclRefExprs(CBE->getBody());
+ else
+ GetBlockDeclRefExprs(*CI);
+ }
+ // Handle specific things.
+ if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
+ if (DRE->refersToEnclosingLocal()) {
+ // FIXME: Handle enums.
+ if (!isa<FunctionDecl>(DRE->getDecl()))
+ BlockDeclRefs.push_back(DRE);
+ if (HasLocalVariableExternalStorage(DRE->getDecl()))
+ BlockDeclRefs.push_back(DRE);
+ }
+ }
+
+ return;
+}
+
+void RewriteModernObjC::GetInnerBlockDeclRefExprs(Stmt *S,
+ SmallVector<DeclRefExpr *, 8> &InnerBlockDeclRefs,
+ llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts) {
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI)) {
+ InnerContexts.insert(cast<DeclContext>(CBE->getBlockDecl()));
+ GetInnerBlockDeclRefExprs(CBE->getBody(),
+ InnerBlockDeclRefs,
+ InnerContexts);
+ }
+ else
+ GetInnerBlockDeclRefExprs(*CI,
+ InnerBlockDeclRefs,
+ InnerContexts);
+
+ }
+ // Handle specific things.
+ if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
+ if (DRE->refersToEnclosingLocal()) {
+ if (!isa<FunctionDecl>(DRE->getDecl()) &&
+ !InnerContexts.count(DRE->getDecl()->getDeclContext()))
+ InnerBlockDeclRefs.push_back(DRE);
+ if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl()))
+ if (Var->isFunctionOrMethodVarDecl())
+ ImportedLocalExternalDecls.insert(Var);
+ }
+ }
+
+ return;
+}
+
+/// convertObjCTypeToCStyleType - This routine converts such objc types
+/// as qualified objects, and blocks to their closest c/c++ types that
+/// it can. It returns true if input type was modified.
+bool RewriteModernObjC::convertObjCTypeToCStyleType(QualType &T) {
+ QualType oldT = T;
+ convertBlockPointerToFunctionPointer(T);
+ if (T->isFunctionPointerType()) {
+ QualType PointeeTy;
+ if (const PointerType* PT = T->getAs<PointerType>()) {
+ PointeeTy = PT->getPointeeType();
+ if (const FunctionType *FT = PointeeTy->getAs<FunctionType>()) {
+ T = convertFunctionTypeOfBlocks(FT);
+ T = Context->getPointerType(T);
+ }
+ }
+ }
+
+ convertToUnqualifiedObjCType(T);
+ return T != oldT;
+}
+
+/// convertFunctionTypeOfBlocks - This routine converts a function type
+/// whose result type may be a block pointer or whose argument type(s)
+/// might be block pointers to an equivalent function type replacing
+/// all block pointers to function pointers.
+QualType RewriteModernObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
+ const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
+ // FTP will be null for closures that don't take arguments.
+ // Generate a funky cast.
+ SmallVector<QualType, 8> ArgTypes;
+ QualType Res = FT->getResultType();
+ bool modified = convertObjCTypeToCStyleType(Res);
+
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I && (I != E); ++I) {
+ QualType t = *I;
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ if (convertObjCTypeToCStyleType(t))
+ modified = true;
+ ArgTypes.push_back(t);
+ }
+ }
+ QualType FuncType;
+ if (modified)
+ FuncType = getSimpleFunctionType(Res, &ArgTypes[0], ArgTypes.size());
+ else FuncType = QualType(FT, 0);
+ return FuncType;
+}
+
+Stmt *RewriteModernObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
+ // Navigate to relevant type information.
+ const BlockPointerType *CPT = 0;
+
+ if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BlockExp)) {
+ CPT = DRE->getType()->getAs<BlockPointerType>();
+ } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(BlockExp)) {
+ CPT = MExpr->getType()->getAs<BlockPointerType>();
+ }
+ else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(BlockExp)) {
+ return SynthesizeBlockCall(Exp, PRE->getSubExpr());
+ }
+ else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(BlockExp))
+ CPT = IEXPR->getType()->getAs<BlockPointerType>();
+ else if (const ConditionalOperator *CEXPR =
+ dyn_cast<ConditionalOperator>(BlockExp)) {
+ Expr *LHSExp = CEXPR->getLHS();
+ Stmt *LHSStmt = SynthesizeBlockCall(Exp, LHSExp);
+ Expr *RHSExp = CEXPR->getRHS();
+ Stmt *RHSStmt = SynthesizeBlockCall(Exp, RHSExp);
+ Expr *CONDExp = CEXPR->getCond();
+ ConditionalOperator *CondExpr =
+ new (Context) ConditionalOperator(CONDExp,
+ SourceLocation(), cast<Expr>(LHSStmt),
+ SourceLocation(), cast<Expr>(RHSStmt),
+ Exp->getType(), VK_RValue, OK_Ordinary);
+ return CondExpr;
+ } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(BlockExp)) {
+ CPT = IRE->getType()->getAs<BlockPointerType>();
+ } else if (const PseudoObjectExpr *POE
+ = dyn_cast<PseudoObjectExpr>(BlockExp)) {
+ CPT = POE->getType()->castAs<BlockPointerType>();
+ } else {
+ assert(1 && "RewriteBlockClass: Bad type");
+ }
+ assert(CPT && "RewriteBlockClass: Bad type");
+ const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
+ assert(FT && "RewriteBlockClass: Bad type");
+ const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
+ // FTP will be null for closures that don't take arguments.
+
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("__block_impl"));
+ QualType PtrBlock = Context->getPointerType(Context->getTagDeclType(RD));
+
+ // Generate a funky cast.
+ SmallVector<QualType, 8> ArgTypes;
+
+ // Push the block argument type.
+ ArgTypes.push_back(PtrBlock);
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I && (I != E); ++I) {
+ QualType t = *I;
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ if (!convertBlockPointerToFunctionPointer(t))
+ convertToUnqualifiedObjCType(t);
+ ArgTypes.push_back(t);
+ }
+ }
+ // Now do the pointer to function cast.
+ QualType PtrToFuncCastType
+ = getSimpleFunctionType(Exp->getType(), &ArgTypes[0], ArgTypes.size());
+
+ PtrToFuncCastType = Context->getPointerType(PtrToFuncCastType);
+
+ CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Context, PtrBlock,
+ CK_BitCast,
+ const_cast<Expr*>(BlockExp));
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
+ BlkCast);
+ //PE->dump();
+
+ FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
+ SourceLocation(),
+ &Context->Idents.get("FuncPtr"),
+ Context->VoidPtrTy, 0,
+ /*BitWidth=*/0, /*Mutable=*/true,
+ /*HasInit=*/false);
+ MemberExpr *ME = new (Context) MemberExpr(PE, true, FD, SourceLocation(),
+ FD->getType(), VK_LValue,
+ OK_Ordinary);
+
+
+ CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
+ CK_BitCast, ME);
+ PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
+
+ SmallVector<Expr*, 8> BlkExprs;
+ // Add the implicit argument.
+ BlkExprs.push_back(BlkCast);
+ // Add the user arguments.
+ for (CallExpr::arg_iterator I = Exp->arg_begin(),
+ E = Exp->arg_end(); I != E; ++I) {
+ BlkExprs.push_back(*I);
+ }
+ CallExpr *CE = new (Context) CallExpr(*Context, PE, &BlkExprs[0],
+ BlkExprs.size(),
+ Exp->getType(), VK_RValue,
+ SourceLocation());
+ return CE;
+}
+
+// We need to return the rewritten expression to handle cases where the
+// DeclRefExpr is embedded in another expression being rewritten.
+// For example:
+//
+// int main() {
+// __block Foo *f;
+// __block int i;
+//
+// void (^myblock)() = ^() {
+// [f test]; // f is a DeclRefExpr embedded in a message (which is being rewritten).
+// i = 77;
+// };
+//}
+Stmt *RewriteModernObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
+ // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
+ // for each DeclRefExp where BYREFVAR is name of the variable.
+ ValueDecl *VD = DeclRefExp->getDecl();
+ bool isArrow = DeclRefExp->refersToEnclosingLocal();
+
+ FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
+ SourceLocation(),
+ &Context->Idents.get("__forwarding"),
+ Context->VoidPtrTy, 0,
+ /*BitWidth=*/0, /*Mutable=*/true,
+ /*HasInit=*/false);
+ MemberExpr *ME = new (Context) MemberExpr(DeclRefExp, isArrow,
+ FD, SourceLocation(),
+ FD->getType(), VK_LValue,
+ OK_Ordinary);
+
+ StringRef Name = VD->getName();
+ FD = FieldDecl::Create(*Context, 0, SourceLocation(), SourceLocation(),
+ &Context->Idents.get(Name),
+ Context->VoidPtrTy, 0,
+ /*BitWidth=*/0, /*Mutable=*/true,
+ /*HasInit=*/false);
+ ME = new (Context) MemberExpr(ME, true, FD, SourceLocation(),
+ DeclRefExp->getType(), VK_LValue, OK_Ordinary);
+
+
+
+ // Need parens to enforce precedence.
+ ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
+ DeclRefExp->getExprLoc(),
+ ME);
+ ReplaceStmt(DeclRefExp, PE);
+ return PE;
+}
+
+// Rewrites the imported local variable V with external storage
+// (static, extern, etc.) as *V
+//
+Stmt *RewriteModernObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
+ ValueDecl *VD = DRE->getDecl();
+ if (VarDecl *Var = dyn_cast<VarDecl>(VD))
+ if (!ImportedLocalExternalDecls.count(Var))
+ return DRE;
+ Expr *Exp = new (Context) UnaryOperator(DRE, UO_Deref, DRE->getType(),
+ VK_LValue, OK_Ordinary,
+ DRE->getLocation());
+ // Need parens to enforce precedence.
+ ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
+ Exp);
+ ReplaceStmt(DRE, PE);
+ return PE;
+}
+
+void RewriteModernObjC::RewriteCastExpr(CStyleCastExpr *CE) {
+ SourceLocation LocStart = CE->getLParenLoc();
+ SourceLocation LocEnd = CE->getRParenLoc();
+
+ // Need to avoid trying to rewrite synthesized casts.
+ if (LocStart.isInvalid())
+ return;
+ // Need to avoid trying to rewrite casts contained in macros.
+ if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd))
+ return;
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ QualType QT = CE->getType();
+ const Type* TypePtr = QT->getAs<Type>();
+ if (isa<TypeOfExprType>(TypePtr)) {
+ const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
+ QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
+ std::string TypeAsString = "(";
+ RewriteBlockPointerType(TypeAsString, QT);
+ TypeAsString += ")";
+ ReplaceText(LocStart, endBuf-startBuf+1, TypeAsString);
+ return;
+ }
+ // advance the location to startArgList.
+ const char *argPtr = startBuf;
+
+ while (*argPtr++ && (argPtr < endBuf)) {
+ switch (*argPtr) {
+ case '^':
+ // Replace the '^' with '*'.
+ LocStart = LocStart.getLocWithOffset(argPtr-startBuf);
+ ReplaceText(LocStart, 1, "*");
+ break;
+ }
+ }
+ return;
+}
+
+void RewriteModernObjC::RewriteImplicitCastObjCExpr(CastExpr *IC) {
+ CastKind CastKind = IC->getCastKind();
+ if (CastKind != CK_BlockPointerToObjCPointerCast &&
+ CastKind != CK_AnyPointerToBlockPointerCast)
+ return;
+
+ QualType QT = IC->getType();
+ (void)convertBlockPointerToFunctionPointer(QT);
+ std::string TypeString(QT.getAsString(Context->getPrintingPolicy()));
+ std::string Str = "(";
+ Str += TypeString;
+ Str += ")";
+ InsertText(IC->getSubExpr()->getLocStart(), &Str[0], Str.size());
+
+ return;
+}
+
+void RewriteModernObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
+ SourceLocation DeclLoc = FD->getLocation();
+ unsigned parenCount = 0;
+
+ // We have 1 or more arguments that have closure pointers.
+ const char *startBuf = SM->getCharacterData(DeclLoc);
+ const char *startArgList = strchr(startBuf, '(');
+
+ assert((*startArgList == '(') && "Rewriter fuzzy parser confused");
+
+ parenCount++;
+ // advance the location to startArgList.
+ DeclLoc = DeclLoc.getLocWithOffset(startArgList-startBuf);
+ assert((DeclLoc.isValid()) && "Invalid DeclLoc");
+
+ const char *argPtr = startArgList;
+
+ while (*argPtr++ && parenCount) {
+ switch (*argPtr) {
+ case '^':
+ // Replace the '^' with '*'.
+ DeclLoc = DeclLoc.getLocWithOffset(argPtr-startArgList);
+ ReplaceText(DeclLoc, 1, "*");
+ break;
+ case '(':
+ parenCount++;
+ break;
+ case ')':
+ parenCount--;
+ break;
+ }
+ }
+ return;
+}
+
+bool RewriteModernObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
+ const FunctionProtoType *FTP;
+ const PointerType *PT = QT->getAs<PointerType>();
+ if (PT) {
+ FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
+ } else {
+ const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
+ assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
+ FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
+ }
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I != E; ++I)
+ if (isTopLevelBlockPointerType(*I))
+ return true;
+ }
+ return false;
+}
+
+bool RewriteModernObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
+ const FunctionProtoType *FTP;
+ const PointerType *PT = QT->getAs<PointerType>();
+ if (PT) {
+ FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
+ } else {
+ const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
+ assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
+ FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
+ }
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I != E; ++I) {
+ if ((*I)->isObjCQualifiedIdType())
+ return true;
+ if ((*I)->isObjCObjectPointerType() &&
+ (*I)->getPointeeType()->isObjCQualifiedInterfaceType())
+ return true;
+ }
+
+ }
+ return false;
+}
+
+void RewriteModernObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
+ const char *&RParen) {
+ const char *argPtr = strchr(Name, '(');
+ assert((*argPtr == '(') && "Rewriter fuzzy parser confused");
+
+ LParen = argPtr; // output the start.
+ argPtr++; // skip past the left paren.
+ unsigned parenCount = 1;
+
+ while (*argPtr && parenCount) {
+ switch (*argPtr) {
+ case '(': parenCount++; break;
+ case ')': parenCount--; break;
+ default: break;
+ }
+ if (parenCount) argPtr++;
+ }
+ assert((*argPtr == ')') && "Rewriter fuzzy parser confused");
+ RParen = argPtr; // output the end
+}
+
+void RewriteModernObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
+ if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
+ RewriteBlockPointerFunctionArgs(FD);
+ return;
+ }
+ // Handle Variables and Typedefs.
+ SourceLocation DeclLoc = ND->getLocation();
+ QualType DeclT;
+ if (VarDecl *VD = dyn_cast<VarDecl>(ND))
+ DeclT = VD->getType();
+ else if (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(ND))
+ DeclT = TDD->getUnderlyingType();
+ else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
+ DeclT = FD->getType();
+ else
+ llvm_unreachable("RewriteBlockPointerDecl(): Decl type not yet handled");
+
+ const char *startBuf = SM->getCharacterData(DeclLoc);
+ const char *endBuf = startBuf;
+ // scan backward (from the decl location) for the end of the previous decl.
+ while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart)
+ startBuf--;
+ SourceLocation Start = DeclLoc.getLocWithOffset(startBuf-endBuf);
+ std::string buf;
+ unsigned OrigLength=0;
+ // *startBuf != '^' if we are dealing with a pointer to function that
+ // may take block argument types (which will be handled below).
+ if (*startBuf == '^') {
+ // Replace the '^' with '*', computing a negative offset.
+ buf = '*';
+ startBuf++;
+ OrigLength++;
+ }
+ while (*startBuf != ')') {
+ buf += *startBuf;
+ startBuf++;
+ OrigLength++;
+ }
+ buf += ')';
+ OrigLength++;
+
+ if (PointerTypeTakesAnyBlockArguments(DeclT) ||
+ PointerTypeTakesAnyObjCQualifiedType(DeclT)) {
+ // Replace the '^' with '*' for arguments.
+ // Replace id<P> with id/*<>*/
+ DeclLoc = ND->getLocation();
+ startBuf = SM->getCharacterData(DeclLoc);
+ const char *argListBegin, *argListEnd;
+ GetExtentOfArgList(startBuf, argListBegin, argListEnd);
+ while (argListBegin < argListEnd) {
+ if (*argListBegin == '^')
+ buf += '*';
+ else if (*argListBegin == '<') {
+ buf += "/*";
+ buf += *argListBegin++;
+ OrigLength++;;
+ while (*argListBegin != '>') {
+ buf += *argListBegin++;
+ OrigLength++;
+ }
+ buf += *argListBegin;
+ buf += "*/";
+ }
+ else
+ buf += *argListBegin;
+ argListBegin++;
+ OrigLength++;
+ }
+ buf += ')';
+ OrigLength++;
+ }
+ ReplaceText(Start, OrigLength, buf);
+
+ return;
+}
+
+
+/// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
+/// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
+/// struct Block_byref_id_object *src) {
+/// _Block_object_assign (&_dest->object, _src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
+/// [|BLOCK_FIELD_IS_WEAK]) // object
+/// _Block_object_assign(&_dest->object, _src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
+/// [|BLOCK_FIELD_IS_WEAK]) // block
+/// }
+/// And:
+/// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
+/// _Block_object_dispose(_src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
+/// [|BLOCK_FIELD_IS_WEAK]) // object
+/// _Block_object_dispose(_src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
+/// [|BLOCK_FIELD_IS_WEAK]) // block
+/// }
+
+std::string RewriteModernObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
+ int flag) {
+ std::string S;
+ if (CopyDestroyCache.count(flag))
+ return S;
+ CopyDestroyCache.insert(flag);
+ S = "static void __Block_byref_id_object_copy_";
+ S += utostr(flag);
+ S += "(void *dst, void *src) {\n";
+
+ // offset into the object pointer is computed as:
+ // void * + void* + int + int + void* + void *
+ unsigned IntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
+ unsigned VoidPtrSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
+
+ unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
+ S += " _Block_object_assign((char*)dst + ";
+ S += utostr(offset);
+ S += ", *(void * *) ((char*)src + ";
+ S += utostr(offset);
+ S += "), ";
+ S += utostr(flag);
+ S += ");\n}\n";
+
+ S += "static void __Block_byref_id_object_dispose_";
+ S += utostr(flag);
+ S += "(void *src) {\n";
+ S += " _Block_object_dispose(*(void * *) ((char*)src + ";
+ S += utostr(offset);
+ S += "), ";
+ S += utostr(flag);
+ S += ");\n}\n";
+ return S;
+}
+
+/// RewriteByRefVar - For each __block typex ND variable this routine transforms
+/// the declaration into:
+/// struct __Block_byref_ND {
+/// void *__isa; // NULL for everything except __weak pointers
+/// struct __Block_byref_ND *__forwarding;
+/// int32_t __flags;
+/// int32_t __size;
+/// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
+/// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
+/// typex ND;
+/// };
+///
+/// It then replaces declaration of ND variable with:
+/// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
+/// __size=sizeof(struct __Block_byref_ND),
+/// ND=initializer-if-any};
+///
+///
+void RewriteModernObjC::RewriteByRefVar(VarDecl *ND) {
+ int flag = 0;
+ int isa = 0;
+ SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
+ if (DeclLoc.isInvalid())
+ // If type location is missing, it is because of missing type (a warning).
+ // Use variable's location which is good for this case.
+ DeclLoc = ND->getLocation();
+ const char *startBuf = SM->getCharacterData(DeclLoc);
+ SourceLocation X = ND->getLocEnd();
+ X = SM->getExpansionLoc(X);
+ const char *endBuf = SM->getCharacterData(X);
+ std::string Name(ND->getNameAsString());
+ std::string ByrefType;
+ RewriteByRefString(ByrefType, Name, ND, true);
+ ByrefType += " {\n";
+ ByrefType += " void *__isa;\n";
+ RewriteByRefString(ByrefType, Name, ND);
+ ByrefType += " *__forwarding;\n";
+ ByrefType += " int __flags;\n";
+ ByrefType += " int __size;\n";
+ // Add void *__Block_byref_id_object_copy;
+ // void *__Block_byref_id_object_dispose; if needed.
+ QualType Ty = ND->getType();
+ bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty);
+ if (HasCopyAndDispose) {
+ ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
+ ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
+ }
+
+ QualType T = Ty;
+ (void)convertBlockPointerToFunctionPointer(T);
+ T.getAsStringInternal(Name, Context->getPrintingPolicy());
+
+ ByrefType += " " + Name + ";\n";
+ ByrefType += "};\n";
+ // Insert this type in global scope. It is needed by helper function.
+ SourceLocation FunLocStart;
+ if (CurFunctionDef)
+ FunLocStart = getFunctionSourceLocation(CurFunctionDef);
+ else {
+ assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null");
+ FunLocStart = CurMethodDef->getLocStart();
+ }
+ InsertText(FunLocStart, ByrefType);
+ if (Ty.isObjCGCWeak()) {
+ flag |= BLOCK_FIELD_IS_WEAK;
+ isa = 1;
+ }
+
+ if (HasCopyAndDispose) {
+ flag = BLOCK_BYREF_CALLER;
+ QualType Ty = ND->getType();
+ // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
+ if (Ty->isBlockPointerType())
+ flag |= BLOCK_FIELD_IS_BLOCK;
+ else
+ flag |= BLOCK_FIELD_IS_OBJECT;
+ std::string HF = SynthesizeByrefCopyDestroyHelper(ND, flag);
+ if (!HF.empty())
+ InsertText(FunLocStart, HF);
+ }
+
+ // struct __Block_byref_ND ND =
+ // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
+ // initializer-if-any};
+ bool hasInit = (ND->getInit() != 0);
+ // FIXME. rewriter does not support __block c++ objects which
+ // require construction.
+ if (hasInit && dyn_cast<CXXConstructExpr>(ND->getInit()))
+ hasInit = false;
+ unsigned flags = 0;
+ if (HasCopyAndDispose)
+ flags |= BLOCK_HAS_COPY_DISPOSE;
+ Name = ND->getNameAsString();
+ ByrefType.clear();
+ RewriteByRefString(ByrefType, Name, ND);
+ std::string ForwardingCastType("(");
+ ForwardingCastType += ByrefType + " *)";
+ if (!hasInit) {
+ ByrefType += " " + Name + " = {(void*)";
+ ByrefType += utostr(isa);
+ ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
+ ByrefType += utostr(flags);
+ ByrefType += ", ";
+ ByrefType += "sizeof(";
+ RewriteByRefString(ByrefType, Name, ND);
+ ByrefType += ")";
+ if (HasCopyAndDispose) {
+ ByrefType += ", __Block_byref_id_object_copy_";
+ ByrefType += utostr(flag);
+ ByrefType += ", __Block_byref_id_object_dispose_";
+ ByrefType += utostr(flag);
+ }
+ ByrefType += "};\n";
+ unsigned nameSize = Name.size();
+ // for block or function pointer declaration. Name is aleady
+ // part of the declaration.
+ if (Ty->isBlockPointerType() || Ty->isFunctionPointerType())
+ nameSize = 1;
+ ReplaceText(DeclLoc, endBuf-startBuf+nameSize, ByrefType);
+ }
+ else {
+ SourceLocation startLoc;
+ Expr *E = ND->getInit();
+ if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
+ startLoc = ECE->getLParenLoc();
+ else
+ startLoc = E->getLocStart();
+ startLoc = SM->getExpansionLoc(startLoc);
+ endBuf = SM->getCharacterData(startLoc);
+ ByrefType += " " + Name;
+ ByrefType += " = {(void*)";
+ ByrefType += utostr(isa);
+ ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
+ ByrefType += utostr(flags);
+ ByrefType += ", ";
+ ByrefType += "sizeof(";
+ RewriteByRefString(ByrefType, Name, ND);
+ ByrefType += "), ";
+ if (HasCopyAndDispose) {
+ ByrefType += "__Block_byref_id_object_copy_";
+ ByrefType += utostr(flag);
+ ByrefType += ", __Block_byref_id_object_dispose_";
+ ByrefType += utostr(flag);
+ ByrefType += ", ";
+ }
+ ReplaceText(DeclLoc, endBuf-startBuf, ByrefType);
+
+ // Complete the newly synthesized compound expression by inserting a right
+ // curly brace before the end of the declaration.
+ // FIXME: This approach avoids rewriting the initializer expression. It
+ // also assumes there is only one declarator. For example, the following
+ // isn't currently supported by this routine (in general):
+ //
+ // double __block BYREFVAR = 1.34, BYREFVAR2 = 1.37;
+ //
+ const char *startInitializerBuf = SM->getCharacterData(startLoc);
+ const char *semiBuf = strchr(startInitializerBuf, ';');
+ assert((*semiBuf == ';') && "RewriteByRefVar: can't find ';'");
+ SourceLocation semiLoc =
+ startLoc.getLocWithOffset(semiBuf-startInitializerBuf);
+
+ InsertText(semiLoc, "}");
+ }
+ return;
+}
+
+void RewriteModernObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
+ // Add initializers for any closure decl refs.
+ GetBlockDeclRefExprs(Exp->getBody());
+ if (BlockDeclRefs.size()) {
+ // Unique all "by copy" declarations.
+ for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
+ if (!BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
+ if (!BlockByCopyDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
+ BlockByCopyDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
+ BlockByCopyDecls.push_back(BlockDeclRefs[i]->getDecl());
+ }
+ }
+ // Unique all "by ref" declarations.
+ for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
+ if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
+ if (!BlockByRefDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
+ BlockByRefDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
+ BlockByRefDecls.push_back(BlockDeclRefs[i]->getDecl());
+ }
+ }
+ // Find any imported blocks...they will need special attention.
+ for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
+ if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
+ BlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
+ BlockDeclRefs[i]->getType()->isBlockPointerType())
+ ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl());
+ }
+}
+
+FunctionDecl *RewriteModernObjC::SynthBlockInitFunctionDecl(StringRef name) {
+ IdentifierInfo *ID = &Context->Idents.get(name);
+ QualType FType = Context->getFunctionNoProtoType(Context->VoidPtrTy);
+ return FunctionDecl::Create(*Context, TUDecl, SourceLocation(),
+ SourceLocation(), ID, FType, 0, SC_Extern,
+ SC_None, false, false);
+}
+
+Stmt *RewriteModernObjC::SynthBlockInitExpr(BlockExpr *Exp,
+ const SmallVector<DeclRefExpr *, 8> &InnerBlockDeclRefs) {
+
+ const BlockDecl *block = Exp->getBlockDecl();
+
+ Blocks.push_back(Exp);
+
+ CollectBlockDeclRefInfo(Exp);
+
+ // Add inner imported variables now used in current block.
+ int countOfInnerDecls = 0;
+ if (!InnerBlockDeclRefs.empty()) {
+ for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++) {
+ DeclRefExpr *Exp = InnerBlockDeclRefs[i];
+ ValueDecl *VD = Exp->getDecl();
+ if (!VD->hasAttr<BlocksAttr>() && !BlockByCopyDeclsPtrSet.count(VD)) {
+ // We need to save the copied-in variables in nested
+ // blocks because it is needed at the end for some of the API generations.
+ // See SynthesizeBlockLiterals routine.
+ InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
+ BlockDeclRefs.push_back(Exp);
+ BlockByCopyDeclsPtrSet.insert(VD);
+ BlockByCopyDecls.push_back(VD);
+ }
+ if (VD->hasAttr<BlocksAttr>() && !BlockByRefDeclsPtrSet.count(VD)) {
+ InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
+ BlockDeclRefs.push_back(Exp);
+ BlockByRefDeclsPtrSet.insert(VD);
+ BlockByRefDecls.push_back(VD);
+ }
+ }
+ // Find any imported blocks...they will need special attention.
+ for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++)
+ if (InnerBlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
+ InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
+ InnerBlockDeclRefs[i]->getType()->isBlockPointerType())
+ ImportedBlockDecls.insert(InnerBlockDeclRefs[i]->getDecl());
+ }
+ InnerDeclRefsCount.push_back(countOfInnerDecls);
+
+ std::string FuncName;
+
+ if (CurFunctionDef)
+ FuncName = CurFunctionDef->getNameAsString();
+ else if (CurMethodDef)
+ BuildUniqueMethodName(FuncName, CurMethodDef);
+ else if (GlobalVarDecl)
+ FuncName = std::string(GlobalVarDecl->getNameAsString());
+
+ bool GlobalBlockExpr =
+ block->getDeclContext()->getRedeclContext()->isFileContext();
+
+ if (GlobalBlockExpr && !GlobalVarDecl) {
+ Diags.Report(block->getLocation(), GlobalBlockRewriteFailedDiag);
+ GlobalBlockExpr = false;
+ }
+
+ std::string BlockNumber = utostr(Blocks.size()-1);
+
+ std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
+
+ // Get a pointer to the function type so we can cast appropriately.
+ QualType BFT = convertFunctionTypeOfBlocks(Exp->getFunctionType());
+ QualType FType = Context->getPointerType(BFT);
+
+ FunctionDecl *FD;
+ Expr *NewRep;
+
+ // Simulate a contructor call...
+ std::string Tag;
+
+ if (GlobalBlockExpr)
+ Tag = "__global_";
+ else
+ Tag = "__";
+ Tag += FuncName + "_block_impl_" + BlockNumber;
+
+ FD = SynthBlockInitFunctionDecl(Tag);
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(FD, false, FType, VK_RValue,
+ SourceLocation());
+
+ SmallVector<Expr*, 4> InitExprs;
+
+ // Initialize the block function.
+ FD = SynthBlockInitFunctionDecl(Func);
+ DeclRefExpr *Arg = new (Context) DeclRefExpr(FD, false, FD->getType(),
+ VK_LValue, SourceLocation());
+ CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
+ CK_BitCast, Arg);
+ InitExprs.push_back(castExpr);
+
+ // Initialize the block descriptor.
+ std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
+
+ VarDecl *NewVD = VarDecl::Create(*Context, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get(DescData.c_str()),
+ Context->VoidPtrTy, 0,
+ SC_Static, SC_None);
+ UnaryOperator *DescRefExpr =
+ new (Context) UnaryOperator(new (Context) DeclRefExpr(NewVD, false,
+ Context->VoidPtrTy,
+ VK_LValue,
+ SourceLocation()),
+ UO_AddrOf,
+ Context->getPointerType(Context->VoidPtrTy),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ InitExprs.push_back(DescRefExpr);
+
+ // Add initializers for any closure decl refs.
+ if (BlockDeclRefs.size()) {
+ Expr *Exp;
+ // Output all "by copy" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
+ E = BlockByCopyDecls.end(); I != E; ++I) {
+ if (isObjCType((*I)->getType())) {
+ // FIXME: Conform to ABI ([[obj retain] autorelease]).
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Exp = new (Context) DeclRefExpr(FD, false, FD->getType(),
+ VK_LValue, SourceLocation());
+ if (HasLocalVariableExternalStorage(*I)) {
+ QualType QT = (*I)->getType();
+ QT = Context->getPointerType(QT);
+ Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
+ OK_Ordinary, SourceLocation());
+ }
+ } else if (isTopLevelBlockPointerType((*I)->getType())) {
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Arg = new (Context) DeclRefExpr(FD, false, FD->getType(),
+ VK_LValue, SourceLocation());
+ Exp = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
+ CK_BitCast, Arg);
+ } else {
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Exp = new (Context) DeclRefExpr(FD, false, FD->getType(),
+ VK_LValue, SourceLocation());
+ if (HasLocalVariableExternalStorage(*I)) {
+ QualType QT = (*I)->getType();
+ QT = Context->getPointerType(QT);
+ Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
+ OK_Ordinary, SourceLocation());
+ }
+
+ }
+ InitExprs.push_back(Exp);
+ }
+ // Output all "by ref" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ ValueDecl *ND = (*I);
+ std::string Name(ND->getNameAsString());
+ std::string RecName;
+ RewriteByRefString(RecName, Name, ND, true);
+ IdentifierInfo *II = &Context->Idents.get(RecName.c_str()
+ + sizeof("struct"));
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ II);
+ assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl");
+ QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
+
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Exp = new (Context) DeclRefExpr(FD, false, FD->getType(), VK_LValue,
+ SourceLocation());
+ bool isNestedCapturedVar = false;
+ if (block)
+ for (BlockDecl::capture_const_iterator ci = block->capture_begin(),
+ ce = block->capture_end(); ci != ce; ++ci) {
+ const VarDecl *variable = ci->getVariable();
+ if (variable == ND && ci->isNested()) {
+ assert (ci->isByRef() &&
+ "SynthBlockInitExpr - captured block variable is not byref");
+ isNestedCapturedVar = true;
+ break;
+ }
+ }
+ // captured nested byref variable has its address passed. Do not take
+ // its address again.
+ if (!isNestedCapturedVar)
+ Exp = new (Context) UnaryOperator(Exp, UO_AddrOf,
+ Context->getPointerType(Exp->getType()),
+ VK_RValue, OK_Ordinary, SourceLocation());
+ Exp = NoTypeInfoCStyleCastExpr(Context, castT, CK_BitCast, Exp);
+ InitExprs.push_back(Exp);
+ }
+ }
+ if (ImportedBlockDecls.size()) {
+ // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
+ int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
+ unsigned IntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
+ Expr *FlagExp = IntegerLiteral::Create(*Context, llvm::APInt(IntSize, flag),
+ Context->IntTy, SourceLocation());
+ InitExprs.push_back(FlagExp);
+ }
+ NewRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0], InitExprs.size(),
+ FType, VK_LValue, SourceLocation());
+
+ if (GlobalBlockExpr) {
+ assert (GlobalConstructionExp == 0 &&
+ "SynthBlockInitExpr - GlobalConstructionExp must be null");
+ GlobalConstructionExp = NewRep;
+ NewRep = DRE;
+ }
+
+ NewRep = new (Context) UnaryOperator(NewRep, UO_AddrOf,
+ Context->getPointerType(NewRep->getType()),
+ VK_RValue, OK_Ordinary, SourceLocation());
+ NewRep = NoTypeInfoCStyleCastExpr(Context, FType, CK_BitCast,
+ NewRep);
+ BlockDeclRefs.clear();
+ BlockByRefDecls.clear();
+ BlockByRefDeclsPtrSet.clear();
+ BlockByCopyDecls.clear();
+ BlockByCopyDeclsPtrSet.clear();
+ ImportedBlockDecls.clear();
+ return NewRep;
+}
+
+bool RewriteModernObjC::IsDeclStmtInForeachHeader(DeclStmt *DS) {
+ if (const ObjCForCollectionStmt * CS =
+ dyn_cast<ObjCForCollectionStmt>(Stmts.back()))
+ return CS->getElement() == DS;
+ return false;
+}
+
+//===----------------------------------------------------------------------===//
+// Function Body / Expression rewriting
+//===----------------------------------------------------------------------===//
+
+Stmt *RewriteModernObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
+ if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
+ isa<DoStmt>(S) || isa<ForStmt>(S))
+ Stmts.push_back(S);
+ else if (isa<ObjCForCollectionStmt>(S)) {
+ Stmts.push_back(S);
+ ObjCBcLabelNo.push_back(++BcLabelCount);
+ }
+
+ // Pseudo-object operations and ivar references need special
+ // treatment because we're going to recursively rewrite them.
+ if (PseudoObjectExpr *PseudoOp = dyn_cast<PseudoObjectExpr>(S)) {
+ if (isa<BinaryOperator>(PseudoOp->getSyntacticForm())) {
+ return RewritePropertyOrImplicitSetter(PseudoOp);
+ } else {
+ return RewritePropertyOrImplicitGetter(PseudoOp);
+ }
+ } else if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(S)) {
+ return RewriteObjCIvarRefExpr(IvarRefExpr);
+ }
+
+ SourceRange OrigStmtRange = S->getSourceRange();
+
+ // Perform a bottom up rewrite of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ Stmt *childStmt = (*CI);
+ Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(childStmt);
+ if (newStmt) {
+ *CI = newStmt;
+ }
+ }
+
+ if (BlockExpr *BE = dyn_cast<BlockExpr>(S)) {
+ SmallVector<DeclRefExpr *, 8> InnerBlockDeclRefs;
+ llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
+ InnerContexts.insert(BE->getBlockDecl());
+ ImportedLocalExternalDecls.clear();
+ GetInnerBlockDeclRefExprs(BE->getBody(),
+ InnerBlockDeclRefs, InnerContexts);
+ // Rewrite the block body in place.
+ Stmt *SaveCurrentBody = CurrentBody;
+ CurrentBody = BE->getBody();
+ PropParentMap = 0;
+ // block literal on rhs of a property-dot-sytax assignment
+ // must be replaced by its synthesize ast so getRewrittenText
+ // works as expected. In this case, what actually ends up on RHS
+ // is the blockTranscribed which is the helper function for the
+ // block literal; as in: self.c = ^() {[ace ARR];};
+ bool saveDisableReplaceStmt = DisableReplaceStmt;
+ DisableReplaceStmt = false;
+ RewriteFunctionBodyOrGlobalInitializer(BE->getBody());
+ DisableReplaceStmt = saveDisableReplaceStmt;
+ CurrentBody = SaveCurrentBody;
+ PropParentMap = 0;
+ ImportedLocalExternalDecls.clear();
+ // Now we snarf the rewritten text and stash it away for later use.
+ std::string Str = Rewrite.getRewrittenText(BE->getSourceRange());
+ RewrittenBlockExprs[BE] = Str;
+
+ Stmt *blockTranscribed = SynthBlockInitExpr(BE, InnerBlockDeclRefs);
+
+ //blockTranscribed->dump();
+ ReplaceStmt(S, blockTranscribed);
+ return blockTranscribed;
+ }
+ // Handle specific things.
+ if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(S))
+ return RewriteAtEncode(AtEncode);
+
+ if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(S))
+ return RewriteAtSelector(AtSelector);
+
+ if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(S))
+ return RewriteObjCStringLiteral(AtString);
+
+ if (ObjCBoolLiteralExpr *BoolLitExpr = dyn_cast<ObjCBoolLiteralExpr>(S))
+ return RewriteObjCBoolLiteralExpr(BoolLitExpr);
+
+ if (ObjCNumericLiteral *NumericLitExpr = dyn_cast<ObjCNumericLiteral>(S))
+ return RewriteObjCNumericLiteralExpr(NumericLitExpr);
+
+ if (ObjCArrayLiteral *ArrayLitExpr = dyn_cast<ObjCArrayLiteral>(S))
+ return RewriteObjCArrayLiteralExpr(ArrayLitExpr);
+
+ if (ObjCDictionaryLiteral *DictionaryLitExpr =
+ dyn_cast<ObjCDictionaryLiteral>(S))
+ return RewriteObjCDictionaryLiteralExpr(DictionaryLitExpr);
+
+ if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(S)) {
+#if 0
+ // Before we rewrite it, put the original message expression in a comment.
+ SourceLocation startLoc = MessExpr->getLocStart();
+ SourceLocation endLoc = MessExpr->getLocEnd();
+
+ const char *startBuf = SM->getCharacterData(startLoc);
+ const char *endBuf = SM->getCharacterData(endLoc);
+
+ std::string messString;
+ messString += "// ";
+ messString.append(startBuf, endBuf-startBuf+1);
+ messString += "\n";
+
+ // FIXME: Missing definition of
+ // InsertText(clang::SourceLocation, char const*, unsigned int).
+ // InsertText(startLoc, messString.c_str(), messString.size());
+ // Tried this, but it didn't work either...
+ // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
+#endif
+ return RewriteMessageExpr(MessExpr);
+ }
+
+ if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(S))
+ return RewriteObjCTryStmt(StmtTry);
+
+ if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(S))
+ return RewriteObjCSynchronizedStmt(StmtTry);
+
+ if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(S))
+ return RewriteObjCThrowStmt(StmtThrow);
+
+ if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(S))
+ return RewriteObjCProtocolExpr(ProtocolExp);
+
+ if (ObjCForCollectionStmt *StmtForCollection =
+ dyn_cast<ObjCForCollectionStmt>(S))
+ return RewriteObjCForCollectionStmt(StmtForCollection,
+ OrigStmtRange.getEnd());
+ if (BreakStmt *StmtBreakStmt =
+ dyn_cast<BreakStmt>(S))
+ return RewriteBreakStmt(StmtBreakStmt);
+ if (ContinueStmt *StmtContinueStmt =
+ dyn_cast<ContinueStmt>(S))
+ return RewriteContinueStmt(StmtContinueStmt);
+
+ // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
+ // and cast exprs.
+ if (DeclStmt *DS = dyn_cast<DeclStmt>(S)) {
+ // FIXME: What we're doing here is modifying the type-specifier that
+ // precedes the first Decl. In the future the DeclGroup should have
+ // a separate type-specifier that we can rewrite.
+ // NOTE: We need to avoid rewriting the DeclStmt if it is within
+ // the context of an ObjCForCollectionStmt. For example:
+ // NSArray *someArray;
+ // for (id <FooProtocol> index in someArray) ;
+ // This is because RewriteObjCForCollectionStmt() does textual rewriting
+ // and it depends on the original text locations/positions.
+ if (Stmts.empty() || !IsDeclStmtInForeachHeader(DS))
+ RewriteObjCQualifiedInterfaceTypes(*DS->decl_begin());
+
+ // Blocks rewrite rules.
+ for (DeclStmt::decl_iterator DI = DS->decl_begin(), DE = DS->decl_end();
+ DI != DE; ++DI) {
+ Decl *SD = *DI;
+ if (ValueDecl *ND = dyn_cast<ValueDecl>(SD)) {
+ if (isTopLevelBlockPointerType(ND->getType()))
+ RewriteBlockPointerDecl(ND);
+ else if (ND->getType()->isFunctionPointerType())
+ CheckFunctionPointerDecl(ND->getType(), ND);
+ if (VarDecl *VD = dyn_cast<VarDecl>(SD)) {
+ if (VD->hasAttr<BlocksAttr>()) {
+ static unsigned uniqueByrefDeclCount = 0;
+ assert(!BlockByRefDeclNo.count(ND) &&
+ "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl");
+ BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
+ RewriteByRefVar(VD);
+ }
+ else
+ RewriteTypeOfDecl(VD);
+ }
+ }
+ if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(SD)) {
+ if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
+ RewriteBlockPointerDecl(TD);
+ else if (TD->getUnderlyingType()->isFunctionPointerType())
+ CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
+ }
+ }
+ }
+
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S))
+ RewriteObjCQualifiedInterfaceTypes(CE);
+
+ if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
+ isa<DoStmt>(S) || isa<ForStmt>(S)) {
+ assert(!Stmts.empty() && "Statement stack is empty");
+ assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||
+ isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))
+ && "Statement stack mismatch");
+ Stmts.pop_back();
+ }
+ // Handle blocks rewriting.
+ if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
+ ValueDecl *VD = DRE->getDecl();
+ if (VD->hasAttr<BlocksAttr>())
+ return RewriteBlockDeclRefExpr(DRE);
+ if (HasLocalVariableExternalStorage(VD))
+ return RewriteLocalVariableExternalStorage(DRE);
+ }
+
+ if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
+ if (CE->getCallee()->getType()->isBlockPointerType()) {
+ Stmt *BlockCall = SynthesizeBlockCall(CE, CE->getCallee());
+ ReplaceStmt(S, BlockCall);
+ return BlockCall;
+ }
+ }
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S)) {
+ RewriteCastExpr(CE);
+ }
+ if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
+ RewriteImplicitCastObjCExpr(ICE);
+ }
+#if 0
+
+ if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
+ CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
+ ICE->getSubExpr(),
+ SourceLocation());
+ // Get the new text.
+ std::string SStr;
+ llvm::raw_string_ostream Buf(SStr);
+ Replacement->printPretty(Buf, *Context);
+ const std::string &Str = Buf.str();
+
+ printf("CAST = %s\n", &Str[0]);
+ InsertText(ICE->getSubExpr()->getLocStart(), &Str[0], Str.size());
+ delete S;
+ return Replacement;
+ }
+#endif
+ // Return this stmt unmodified.
+ return S;
+}
+
+void RewriteModernObjC::RewriteRecordBody(RecordDecl *RD) {
+ for (RecordDecl::field_iterator i = RD->field_begin(),
+ e = RD->field_end(); i != e; ++i) {
+ FieldDecl *FD = *i;
+ if (isTopLevelBlockPointerType(FD->getType()))
+ RewriteBlockPointerDecl(FD);
+ if (FD->getType()->isObjCQualifiedIdType() ||
+ FD->getType()->isObjCQualifiedInterfaceType())
+ RewriteObjCQualifiedInterfaceTypes(FD);
+ }
+}
+
+/// HandleDeclInMainFile - This is called for each top-level decl defined in the
+/// main file of the input.
+void RewriteModernObjC::HandleDeclInMainFile(Decl *D) {
+ switch (D->getKind()) {
+ case Decl::Function: {
+ FunctionDecl *FD = cast<FunctionDecl>(D);
+ if (FD->isOverloadedOperator())
+ return;
+
+ // Since function prototypes don't have ParmDecl's, we check the function
+ // prototype. This enables us to rewrite function declarations and
+ // definitions using the same code.
+ RewriteBlocksInFunctionProtoType(FD->getType(), FD);
+
+ if (!FD->isThisDeclarationADefinition())
+ break;
+
+ // FIXME: If this should support Obj-C++, support CXXTryStmt
+ if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(FD->getBody())) {
+ CurFunctionDef = FD;
+ CurFunctionDeclToDeclareForBlock = FD;
+ CurrentBody = Body;
+ Body =
+ cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
+ FD->setBody(Body);
+ CurrentBody = 0;
+ if (PropParentMap) {
+ delete PropParentMap;
+ PropParentMap = 0;
+ }
+ // This synthesizes and inserts the block "impl" struct, invoke function,
+ // and any copy/dispose helper functions.
+ InsertBlockLiteralsWithinFunction(FD);
+ CurFunctionDef = 0;
+ CurFunctionDeclToDeclareForBlock = 0;
+ }
+ break;
+ }
+ case Decl::ObjCMethod: {
+ ObjCMethodDecl *MD = cast<ObjCMethodDecl>(D);
+ if (CompoundStmt *Body = MD->getCompoundBody()) {
+ CurMethodDef = MD;
+ CurrentBody = Body;
+ Body =
+ cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
+ MD->setBody(Body);
+ CurrentBody = 0;
+ if (PropParentMap) {
+ delete PropParentMap;
+ PropParentMap = 0;
+ }
+ InsertBlockLiteralsWithinMethod(MD);
+ CurMethodDef = 0;
+ }
+ break;
+ }
+ case Decl::ObjCImplementation: {
+ ObjCImplementationDecl *CI = cast<ObjCImplementationDecl>(D);
+ ClassImplementation.push_back(CI);
+ break;
+ }
+ case Decl::ObjCCategoryImpl: {
+ ObjCCategoryImplDecl *CI = cast<ObjCCategoryImplDecl>(D);
+ CategoryImplementation.push_back(CI);
+ break;
+ }
+ case Decl::Var: {
+ VarDecl *VD = cast<VarDecl>(D);
+ RewriteObjCQualifiedInterfaceTypes(VD);
+ if (isTopLevelBlockPointerType(VD->getType()))
+ RewriteBlockPointerDecl(VD);
+ else if (VD->getType()->isFunctionPointerType()) {
+ CheckFunctionPointerDecl(VD->getType(), VD);
+ if (VD->getInit()) {
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
+ RewriteCastExpr(CE);
+ }
+ }
+ } else if (VD->getType()->isRecordType()) {
+ RecordDecl *RD = VD->getType()->getAs<RecordType>()->getDecl();
+ if (RD->isCompleteDefinition())
+ RewriteRecordBody(RD);
+ }
+ if (VD->getInit()) {
+ GlobalVarDecl = VD;
+ CurrentBody = VD->getInit();
+ RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
+ CurrentBody = 0;
+ if (PropParentMap) {
+ delete PropParentMap;
+ PropParentMap = 0;
+ }
+ SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(), VD->getName());
+ GlobalVarDecl = 0;
+
+ // This is needed for blocks.
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
+ RewriteCastExpr(CE);
+ }
+ }
+ break;
+ }
+ case Decl::TypeAlias:
+ case Decl::Typedef: {
+ if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
+ if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
+ RewriteBlockPointerDecl(TD);
+ else if (TD->getUnderlyingType()->isFunctionPointerType())
+ CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
+ }
+ break;
+ }
+ case Decl::CXXRecord:
+ case Decl::Record: {
+ RecordDecl *RD = cast<RecordDecl>(D);
+ if (RD->isCompleteDefinition())
+ RewriteRecordBody(RD);
+ break;
+ }
+ default:
+ break;
+ }
+ // Nothing yet.
+}
+
+/// Write_ProtocolExprReferencedMetadata - This routine writer out the
+/// protocol reference symbols in the for of:
+/// struct _protocol_t *PROTOCOL_REF = &PROTOCOL_METADATA.
+static void Write_ProtocolExprReferencedMetadata(ASTContext *Context,
+ ObjCProtocolDecl *PDecl,
+ std::string &Result) {
+ // Also output .objc_protorefs$B section and its meta-data.
+ if (Context->getLangOpts().MicrosoftExt)
+ Result += "__declspec(allocate(\".objc_protorefs$B\")) ";
+ Result += "struct _protocol_t *";
+ Result += "_OBJC_PROTOCOL_REFERENCE_$_";
+ Result += PDecl->getNameAsString();
+ Result += " = &";
+ Result += "_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
+ Result += ";\n";
+}
+
+void RewriteModernObjC::HandleTranslationUnit(ASTContext &C) {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ RewriteInclude();
+
+ // Here's a great place to add any extra declarations that may be needed.
+ // Write out meta data for each @protocol(<expr>).
+ for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
+ E = ProtocolExprDecls.end(); I != E; ++I) {
+ RewriteObjCProtocolMetaData(*I, Preamble);
+ Write_ProtocolExprReferencedMetadata(Context, (*I), Preamble);
+ }
+
+ InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
+ for (unsigned i = 0, e = ObjCInterfacesSeen.size(); i < e; i++) {
+ ObjCInterfaceDecl *CDecl = ObjCInterfacesSeen[i];
+ // Write struct declaration for the class matching its ivar declarations.
+ // Note that for modern abi, this is postponed until the end of TU
+ // because class extensions and the implementation might declare their own
+ // private ivars.
+ RewriteInterfaceDecl(CDecl);
+ }
+
+ if (ClassImplementation.size() || CategoryImplementation.size())
+ RewriteImplementations();
+
+ // Get the buffer corresponding to MainFileID. If we haven't changed it, then
+ // we are done.
+ if (const RewriteBuffer *RewriteBuf =
+ Rewrite.getRewriteBufferFor(MainFileID)) {
+ //printf("Changed:\n");
+ *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
+ } else {
+ llvm::errs() << "No changes\n";
+ }
+
+ if (ClassImplementation.size() || CategoryImplementation.size() ||
+ ProtocolExprDecls.size()) {
+ // Rewrite Objective-c meta data*
+ std::string ResultStr;
+ RewriteMetaDataIntoBuffer(ResultStr);
+ // Emit metadata.
+ *OutFile << ResultStr;
+ }
+ // Emit ImageInfo;
+ {
+ std::string ResultStr;
+ WriteImageInfo(ResultStr);
+ *OutFile << ResultStr;
+ }
+ OutFile->flush();
+}
+
+void RewriteModernObjC::Initialize(ASTContext &context) {
+ InitializeCommon(context);
+
+ Preamble += "#ifndef __OBJC2__\n";
+ Preamble += "#define __OBJC2__\n";
+ Preamble += "#endif\n";
+
+ // declaring objc_selector outside the parameter list removes a silly
+ // scope related warning...
+ if (IsHeader)
+ Preamble = "#pragma once\n";
+ Preamble += "struct objc_selector; struct objc_class;\n";
+ Preamble += "struct __rw_objc_super { \n\tstruct objc_object *object; ";
+ Preamble += "\n\tstruct objc_object *superClass; ";
+ // Add a constructor for creating temporary objects.
+ Preamble += "\n\t__rw_objc_super(struct objc_object *o, struct objc_object *s) ";
+ Preamble += ": object(o), superClass(s) {} ";
+ Preamble += "\n};\n";
+
+ if (LangOpts.MicrosoftExt) {
+ // Define all sections using syntax that makes sense.
+ // These are currently generated.
+ Preamble += "\n#pragma section(\".objc_classlist$B\", long, read, write)\n";
+ Preamble += "#pragma section(\".objc_catlist$B\", long, read, write)\n";
+ Preamble += "#pragma section(\".objc_imageinfo$B\", long, read, write)\n";
+ Preamble += "#pragma section(\".objc_nlclslist$B\", long, read, write)\n";
+ Preamble += "#pragma section(\".objc_nlcatlist$B\", long, read, write)\n";
+ Preamble += "#pragma section(\".objc_protorefs$B\", long, read, write)\n";
+ // These are generated but not necessary for functionality.
+ Preamble += "#pragma section(\".cat_cls_meth$B\", long, read, write)\n";
+ Preamble += "#pragma section(\".inst_meth$B\", long, read, write)\n";
+ Preamble += "#pragma section(\".cls_meth$B\", long, read, write)\n";
+ Preamble += "#pragma section(\".objc_ivar$B\", long, read, write)\n";
+
+ // These need be generated for performance. Currently they are not,
+ // using API calls instead.
+ Preamble += "#pragma section(\".objc_selrefs$B\", long, read, write)\n";
+ Preamble += "#pragma section(\".objc_classrefs$B\", long, read, write)\n";
+ Preamble += "#pragma section(\".objc_superrefs$B\", long, read, write)\n";
+
+ }
+ Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
+ Preamble += "typedef struct objc_object Protocol;\n";
+ Preamble += "#define _REWRITER_typedef_Protocol\n";
+ Preamble += "#endif\n";
+ if (LangOpts.MicrosoftExt) {
+ Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
+ Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
+ }
+ else
+ Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
+
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend(void);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper(void);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_stret(void);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper_stret(void);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_fpret(void);\n";
+
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getClass";
+ Preamble += "(const char *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *class_getSuperclass";
+ Preamble += "(struct objc_class *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getMetaClass";
+ Preamble += "(const char *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw( struct objc_object *);\n";
+ // @synchronized hooks.
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_enter( struct objc_object *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_exit( struct objc_object *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
+ Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
+ Preamble += "struct __objcFastEnumerationState {\n\t";
+ Preamble += "unsigned long state;\n\t";
+ Preamble += "void **itemsPtr;\n\t";
+ Preamble += "unsigned long *mutationsPtr;\n\t";
+ Preamble += "unsigned long extra[5];\n};\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_enumerationMutation(struct objc_object *);\n";
+ Preamble += "#define __FASTENUMERATIONSTATE\n";
+ Preamble += "#endif\n";
+ Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n";
+ Preamble += "struct __NSConstantStringImpl {\n";
+ Preamble += " int *isa;\n";
+ Preamble += " int flags;\n";
+ Preamble += " char *str;\n";
+ Preamble += " long length;\n";
+ Preamble += "};\n";
+ Preamble += "#ifdef CF_EXPORT_CONSTANT_STRING\n";
+ Preamble += "extern \"C\" __declspec(dllexport) int __CFConstantStringClassReference[];\n";
+ Preamble += "#else\n";
+ Preamble += "__OBJC_RW_DLLIMPORT int __CFConstantStringClassReference[];\n";
+ Preamble += "#endif\n";
+ Preamble += "#define __NSCONSTANTSTRINGIMPL\n";
+ Preamble += "#endif\n";
+ // Blocks preamble.
+ Preamble += "#ifndef BLOCK_IMPL\n";
+ Preamble += "#define BLOCK_IMPL\n";
+ Preamble += "struct __block_impl {\n";
+ Preamble += " void *isa;\n";
+ Preamble += " int Flags;\n";
+ Preamble += " int Reserved;\n";
+ Preamble += " void *FuncPtr;\n";
+ Preamble += "};\n";
+ Preamble += "// Runtime copy/destroy helper functions (from Block_private.h)\n";
+ Preamble += "#ifdef __OBJC_EXPORT_BLOCKS\n";
+ Preamble += "extern \"C\" __declspec(dllexport) "
+ "void _Block_object_assign(void *, const void *, const int);\n";
+ Preamble += "extern \"C\" __declspec(dllexport) void _Block_object_dispose(const void *, const int);\n";
+ Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteGlobalBlock[32];\n";
+ Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteStackBlock[32];\n";
+ Preamble += "#else\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_assign(void *, const void *, const int);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_dispose(const void *, const int);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteGlobalBlock[32];\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteStackBlock[32];\n";
+ Preamble += "#endif\n";
+ Preamble += "#endif\n";
+ if (LangOpts.MicrosoftExt) {
+ Preamble += "#undef __OBJC_RW_DLLIMPORT\n";
+ Preamble += "#undef __OBJC_RW_STATICIMPORT\n";
+ Preamble += "#ifndef KEEP_ATTRIBUTES\n"; // We use this for clang tests.
+ Preamble += "#define __attribute__(X)\n";
+ Preamble += "#endif\n";
+ Preamble += "#ifndef __weak\n";
+ Preamble += "#define __weak\n";
+ Preamble += "#endif\n";
+ Preamble += "#ifndef __block\n";
+ Preamble += "#define __block\n";
+ Preamble += "#endif\n";
+ }
+ else {
+ Preamble += "#define __block\n";
+ Preamble += "#define __weak\n";
+ }
+
+ // Declarations required for modern objective-c array and dictionary literals.
+ Preamble += "\n#include <stdarg.h>\n";
+ Preamble += "struct __NSContainer_literal {\n";
+ Preamble += " void * *arr;\n";
+ Preamble += " __NSContainer_literal (unsigned int count, ...) {\n";
+ Preamble += "\tva_list marker;\n";
+ Preamble += "\tva_start(marker, count);\n";
+ Preamble += "\tarr = new void *[count];\n";
+ Preamble += "\tfor (unsigned i = 0; i < count; i++)\n";
+ Preamble += "\t arr[i] = va_arg(marker, void *);\n";
+ Preamble += "\tva_end( marker );\n";
+ Preamble += " };\n";
+ Preamble += " __NSContainer_literal() {\n";
+ Preamble += "\tdelete[] arr;\n";
+ Preamble += " }\n";
+ Preamble += "};\n";
+
+ // NOTE! Windows uses LLP64 for 64bit mode. So, cast pointer to long long
+ // as this avoids warning in any 64bit/32bit compilation model.
+ Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
+}
+
+/// RewriteIvarOffsetComputation - This rutine synthesizes computation of
+/// ivar offset.
+void RewriteModernObjC::RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
+ std::string &Result) {
+ if (ivar->isBitField()) {
+ // FIXME: The hack below doesn't work for bitfields. For now, we simply
+ // place all bitfields at offset 0.
+ Result += "0";
+ } else {
+ Result += "__OFFSETOFIVAR__(struct ";
+ Result += ivar->getContainingInterface()->getNameAsString();
+ if (LangOpts.MicrosoftExt)
+ Result += "_IMPL";
+ Result += ", ";
+ Result += ivar->getNameAsString();
+ Result += ")";
+ }
+}
+
+/// WriteModernMetadataDeclarations - Writes out metadata declarations for modern ABI.
+/// struct _prop_t {
+/// const char *name;
+/// char *attributes;
+/// }
+
+/// struct _prop_list_t {
+/// uint32_t entsize; // sizeof(struct _prop_t)
+/// uint32_t count_of_properties;
+/// struct _prop_t prop_list[count_of_properties];
+/// }
+
+/// struct _protocol_t;
+
+/// struct _protocol_list_t {
+/// long protocol_count; // Note, this is 32/64 bit
+/// struct _protocol_t * protocol_list[protocol_count];
+/// }
+
+/// struct _objc_method {
+/// SEL _cmd;
+/// const char *method_type;
+/// char *_imp;
+/// }
+
+/// struct _method_list_t {
+/// uint32_t entsize; // sizeof(struct _objc_method)
+/// uint32_t method_count;
+/// struct _objc_method method_list[method_count];
+/// }
+
+/// struct _protocol_t {
+/// id isa; // NULL
+/// const char *protocol_name;
+/// const struct _protocol_list_t * protocol_list; // super protocols
+/// const struct method_list_t *instance_methods;
+/// const struct method_list_t *class_methods;
+/// const struct method_list_t *optionalInstanceMethods;
+/// const struct method_list_t *optionalClassMethods;
+/// const struct _prop_list_t * properties;
+/// const uint32_t size; // sizeof(struct _protocol_t)
+/// const uint32_t flags; // = 0
+/// const char ** extendedMethodTypes;
+/// }
+
+/// struct _ivar_t {
+/// unsigned long int *offset; // pointer to ivar offset location
+/// const char *name;
+/// const char *type;
+/// uint32_t alignment;
+/// uint32_t size;
+/// }
+
+/// struct _ivar_list_t {
+/// uint32 entsize; // sizeof(struct _ivar_t)
+/// uint32 count;
+/// struct _ivar_t list[count];
+/// }
+
+/// struct _class_ro_t {
+/// uint32_t flags;
+/// uint32_t instanceStart;
+/// uint32_t instanceSize;
+/// uint32_t reserved; // only when building for 64bit targets
+/// const uint8_t *ivarLayout;
+/// const char *name;
+/// const struct _method_list_t *baseMethods;
+/// const struct _protocol_list_t *baseProtocols;
+/// const struct _ivar_list_t *ivars;
+/// const uint8_t *weakIvarLayout;
+/// const struct _prop_list_t *properties;
+/// }
+
+/// struct _class_t {
+/// struct _class_t *isa;
+/// struct _class_t *superclass;
+/// void *cache;
+/// IMP *vtable;
+/// struct _class_ro_t *ro;
+/// }
+
+/// struct _category_t {
+/// const char *name;
+/// struct _class_t *cls;
+/// const struct _method_list_t *instance_methods;
+/// const struct _method_list_t *class_methods;
+/// const struct _protocol_list_t *protocols;
+/// const struct _prop_list_t *properties;
+/// }
+
+/// MessageRefTy - LLVM for:
+/// struct _message_ref_t {
+/// IMP messenger;
+/// SEL name;
+/// };
+
+/// SuperMessageRefTy - LLVM for:
+/// struct _super_message_ref_t {
+/// SUPER_IMP messenger;
+/// SEL name;
+/// };
+
+static void WriteModernMetadataDeclarations(ASTContext *Context, std::string &Result) {
+ static bool meta_data_declared = false;
+ if (meta_data_declared)
+ return;
+
+ Result += "\nstruct _prop_t {\n";
+ Result += "\tconst char *name;\n";
+ Result += "\tconst char *attributes;\n";
+ Result += "};\n";
+
+ Result += "\nstruct _protocol_t;\n";
+
+ Result += "\nstruct _objc_method {\n";
+ Result += "\tstruct objc_selector * _cmd;\n";
+ Result += "\tconst char *method_type;\n";
+ Result += "\tvoid *_imp;\n";
+ Result += "};\n";
+
+ Result += "\nstruct _protocol_t {\n";
+ Result += "\tvoid * isa; // NULL\n";
+ Result += "\tconst char *protocol_name;\n";
+ Result += "\tconst struct _protocol_list_t * protocol_list; // super protocols\n";
+ Result += "\tconst struct method_list_t *instance_methods;\n";
+ Result += "\tconst struct method_list_t *class_methods;\n";
+ Result += "\tconst struct method_list_t *optionalInstanceMethods;\n";
+ Result += "\tconst struct method_list_t *optionalClassMethods;\n";
+ Result += "\tconst struct _prop_list_t * properties;\n";
+ Result += "\tconst unsigned int size; // sizeof(struct _protocol_t)\n";
+ Result += "\tconst unsigned int flags; // = 0\n";
+ Result += "\tconst char ** extendedMethodTypes;\n";
+ Result += "};\n";
+
+ Result += "\nstruct _ivar_t {\n";
+ Result += "\tunsigned long int *offset; // pointer to ivar offset location\n";
+ Result += "\tconst char *name;\n";
+ Result += "\tconst char *type;\n";
+ Result += "\tunsigned int alignment;\n";
+ Result += "\tunsigned int size;\n";
+ Result += "};\n";
+
+ Result += "\nstruct _class_ro_t {\n";
+ Result += "\tunsigned int flags;\n";
+ Result += "\tunsigned int instanceStart;\n";
+ Result += "\tunsigned int instanceSize;\n";
+ const llvm::Triple &Triple(Context->getTargetInfo().getTriple());
+ if (Triple.getArch() == llvm::Triple::x86_64)
+ Result += "\tunsigned int reserved;\n";
+ Result += "\tconst unsigned char *ivarLayout;\n";
+ Result += "\tconst char *name;\n";
+ Result += "\tconst struct _method_list_t *baseMethods;\n";
+ Result += "\tconst struct _objc_protocol_list *baseProtocols;\n";
+ Result += "\tconst struct _ivar_list_t *ivars;\n";
+ Result += "\tconst unsigned char *weakIvarLayout;\n";
+ Result += "\tconst struct _prop_list_t *properties;\n";
+ Result += "};\n";
+
+ Result += "\nstruct _class_t {\n";
+ Result += "\tstruct _class_t *isa;\n";
+ Result += "\tstruct _class_t *superclass;\n";
+ Result += "\tvoid *cache;\n";
+ Result += "\tvoid *vtable;\n";
+ Result += "\tstruct _class_ro_t *ro;\n";
+ Result += "};\n";
+
+ Result += "\nstruct _category_t {\n";
+ Result += "\tconst char *name;\n";
+ Result += "\tstruct _class_t *cls;\n";
+ Result += "\tconst struct _method_list_t *instance_methods;\n";
+ Result += "\tconst struct _method_list_t *class_methods;\n";
+ Result += "\tconst struct _protocol_list_t *protocols;\n";
+ Result += "\tconst struct _prop_list_t *properties;\n";
+ Result += "};\n";
+
+ Result += "extern \"C\" __declspec(dllimport) struct objc_cache _objc_empty_cache;\n";
+ Result += "#pragma warning(disable:4273)\n";
+ meta_data_declared = true;
+}
+
+static void Write_protocol_list_t_TypeDecl(std::string &Result,
+ long super_protocol_count) {
+ Result += "struct /*_protocol_list_t*/"; Result += " {\n";
+ Result += "\tlong protocol_count; // Note, this is 32/64 bit\n";
+ Result += "\tstruct _protocol_t *super_protocols[";
+ Result += utostr(super_protocol_count); Result += "];\n";
+ Result += "}";
+}
+
+static void Write_method_list_t_TypeDecl(std::string &Result,
+ unsigned int method_count) {
+ Result += "struct /*_method_list_t*/"; Result += " {\n";
+ Result += "\tunsigned int entsize; // sizeof(struct _objc_method)\n";
+ Result += "\tunsigned int method_count;\n";
+ Result += "\tstruct _objc_method method_list[";
+ Result += utostr(method_count); Result += "];\n";
+ Result += "}";
+}
+
+static void Write__prop_list_t_TypeDecl(std::string &Result,
+ unsigned int property_count) {
+ Result += "struct /*_prop_list_t*/"; Result += " {\n";
+ Result += "\tunsigned int entsize; // sizeof(struct _prop_t)\n";
+ Result += "\tunsigned int count_of_properties;\n";
+ Result += "\tstruct _prop_t prop_list[";
+ Result += utostr(property_count); Result += "];\n";
+ Result += "}";
+}
+
+static void Write__ivar_list_t_TypeDecl(std::string &Result,
+ unsigned int ivar_count) {
+ Result += "struct /*_ivar_list_t*/"; Result += " {\n";
+ Result += "\tunsigned int entsize; // sizeof(struct _prop_t)\n";
+ Result += "\tunsigned int count;\n";
+ Result += "\tstruct _ivar_t ivar_list[";
+ Result += utostr(ivar_count); Result += "];\n";
+ Result += "}";
+}
+
+static void Write_protocol_list_initializer(ASTContext *Context, std::string &Result,
+ ArrayRef<ObjCProtocolDecl *> SuperProtocols,
+ StringRef VarName,
+ StringRef ProtocolName) {
+ if (SuperProtocols.size() > 0) {
+ Result += "\nstatic ";
+ Write_protocol_list_t_TypeDecl(Result, SuperProtocols.size());
+ Result += " "; Result += VarName;
+ Result += ProtocolName;
+ Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
+ Result += "\t"; Result += utostr(SuperProtocols.size()); Result += ",\n";
+ for (unsigned i = 0, e = SuperProtocols.size(); i < e; i++) {
+ ObjCProtocolDecl *SuperPD = SuperProtocols[i];
+ Result += "\t&"; Result += "_OBJC_PROTOCOL_";
+ Result += SuperPD->getNameAsString();
+ if (i == e-1)
+ Result += "\n};\n";
+ else
+ Result += ",\n";
+ }
+ }
+}
+
+static void Write_method_list_t_initializer(RewriteModernObjC &RewriteObj,
+ ASTContext *Context, std::string &Result,
+ ArrayRef<ObjCMethodDecl *> Methods,
+ StringRef VarName,
+ StringRef TopLevelDeclName,
+ bool MethodImpl) {
+ if (Methods.size() > 0) {
+ Result += "\nstatic ";
+ Write_method_list_t_TypeDecl(Result, Methods.size());
+ Result += " "; Result += VarName;
+ Result += TopLevelDeclName;
+ Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
+ Result += "\t"; Result += "sizeof(_objc_method)"; Result += ",\n";
+ Result += "\t"; Result += utostr(Methods.size()); Result += ",\n";
+ for (unsigned i = 0, e = Methods.size(); i < e; i++) {
+ ObjCMethodDecl *MD = Methods[i];
+ if (i == 0)
+ Result += "\t{{(struct objc_selector *)\"";
+ else
+ Result += "\t{(struct objc_selector *)\"";
+ Result += (MD)->getSelector().getAsString(); Result += "\"";
+ Result += ", ";
+ std::string MethodTypeString;
+ Context->getObjCEncodingForMethodDecl(MD, MethodTypeString);
+ Result += "\""; Result += MethodTypeString; Result += "\"";
+ Result += ", ";
+ if (!MethodImpl)
+ Result += "0";
+ else {
+ Result += "(void *)";
+ Result += RewriteObj.MethodInternalNames[MD];
+ }
+ if (i == e-1)
+ Result += "}}\n";
+ else
+ Result += "},\n";
+ }
+ Result += "};\n";
+ }
+}
+
+static void Write_prop_list_t_initializer(RewriteModernObjC &RewriteObj,
+ ASTContext *Context, std::string &Result,
+ ArrayRef<ObjCPropertyDecl *> Properties,
+ const Decl *Container,
+ StringRef VarName,
+ StringRef ProtocolName) {
+ if (Properties.size() > 0) {
+ Result += "\nstatic ";
+ Write__prop_list_t_TypeDecl(Result, Properties.size());
+ Result += " "; Result += VarName;
+ Result += ProtocolName;
+ Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
+ Result += "\t"; Result += "sizeof(_prop_t)"; Result += ",\n";
+ Result += "\t"; Result += utostr(Properties.size()); Result += ",\n";
+ for (unsigned i = 0, e = Properties.size(); i < e; i++) {
+ ObjCPropertyDecl *PropDecl = Properties[i];
+ if (i == 0)
+ Result += "\t{{\"";
+ else
+ Result += "\t{\"";
+ Result += PropDecl->getName(); Result += "\",";
+ std::string PropertyTypeString, QuotePropertyTypeString;
+ Context->getObjCEncodingForPropertyDecl(PropDecl, Container, PropertyTypeString);
+ RewriteObj.QuoteDoublequotes(PropertyTypeString, QuotePropertyTypeString);
+ Result += "\""; Result += QuotePropertyTypeString; Result += "\"";
+ if (i == e-1)
+ Result += "}}\n";
+ else
+ Result += "},\n";
+ }
+ Result += "};\n";
+ }
+}
+
+// Metadata flags
+enum MetaDataDlags {
+ CLS = 0x0,
+ CLS_META = 0x1,
+ CLS_ROOT = 0x2,
+ OBJC2_CLS_HIDDEN = 0x10,
+ CLS_EXCEPTION = 0x20,
+
+ /// (Obsolete) ARC-specific: this class has a .release_ivars method
+ CLS_HAS_IVAR_RELEASER = 0x40,
+ /// class was compiled with -fobjc-arr
+ CLS_COMPILED_BY_ARC = 0x80 // (1<<7)
+};
+
+static void Write__class_ro_t_initializer(ASTContext *Context, std::string &Result,
+ unsigned int flags,
+ const std::string &InstanceStart,
+ const std::string &InstanceSize,
+ ArrayRef<ObjCMethodDecl *>baseMethods,
+ ArrayRef<ObjCProtocolDecl *>baseProtocols,
+ ArrayRef<ObjCIvarDecl *>ivars,
+ ArrayRef<ObjCPropertyDecl *>Properties,
+ StringRef VarName,
+ StringRef ClassName) {
+ Result += "\nstatic struct _class_ro_t ";
+ Result += VarName; Result += ClassName;
+ Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
+ Result += "\t";
+ Result += llvm::utostr(flags); Result += ", ";
+ Result += InstanceStart; Result += ", ";
+ Result += InstanceSize; Result += ", \n";
+ Result += "\t";
+ const llvm::Triple &Triple(Context->getTargetInfo().getTriple());
+ if (Triple.getArch() == llvm::Triple::x86_64)
+ // uint32_t const reserved; // only when building for 64bit targets
+ Result += "(unsigned int)0, \n\t";
+ // const uint8_t * const ivarLayout;
+ Result += "0, \n\t";
+ Result += "\""; Result += ClassName; Result += "\",\n\t";
+ bool metaclass = ((flags & CLS_META) != 0);
+ if (baseMethods.size() > 0) {
+ Result += "(const struct _method_list_t *)&";
+ if (metaclass)
+ Result += "_OBJC_$_CLASS_METHODS_";
+ else
+ Result += "_OBJC_$_INSTANCE_METHODS_";
+ Result += ClassName;
+ Result += ",\n\t";
+ }
+ else
+ Result += "0, \n\t";
+
+ if (!metaclass && baseProtocols.size() > 0) {
+ Result += "(const struct _objc_protocol_list *)&";
+ Result += "_OBJC_CLASS_PROTOCOLS_$_"; Result += ClassName;
+ Result += ",\n\t";
+ }
+ else
+ Result += "0, \n\t";
+
+ if (!metaclass && ivars.size() > 0) {
+ Result += "(const struct _ivar_list_t *)&";
+ Result += "_OBJC_$_INSTANCE_VARIABLES_"; Result += ClassName;
+ Result += ",\n\t";
+ }
+ else
+ Result += "0, \n\t";
+
+ // weakIvarLayout
+ Result += "0, \n\t";
+ if (!metaclass && Properties.size() > 0) {
+ Result += "(const struct _prop_list_t *)&";
+ Result += "_OBJC_$_PROP_LIST_"; Result += ClassName;
+ Result += ",\n";
+ }
+ else
+ Result += "0, \n";
+
+ Result += "};\n";
+}
+
+static void Write_class_t(ASTContext *Context, std::string &Result,
+ StringRef VarName,
+ const ObjCInterfaceDecl *CDecl, bool metaclass) {
+ bool rootClass = (!CDecl->getSuperClass());
+ const ObjCInterfaceDecl *RootClass = CDecl;
+
+ if (!rootClass) {
+ // Find the Root class
+ RootClass = CDecl->getSuperClass();
+ while (RootClass->getSuperClass()) {
+ RootClass = RootClass->getSuperClass();
+ }
+ }
+
+ if (metaclass && rootClass) {
+ // Need to handle a case of use of forward declaration.
+ Result += "\n";
+ Result += "extern \"C\" ";
+ if (CDecl->getImplementation())
+ Result += "__declspec(dllexport) ";
+ else
+ Result += "__declspec(dllimport) ";
+
+ Result += "struct _class_t OBJC_CLASS_$_";
+ Result += CDecl->getNameAsString();
+ Result += ";\n";
+ }
+ // Also, for possibility of 'super' metadata class not having been defined yet.
+ if (!rootClass) {
+ ObjCInterfaceDecl *SuperClass = CDecl->getSuperClass();
+ Result += "\n";
+ Result += "extern \"C\" ";
+ if (SuperClass->getImplementation())
+ Result += "__declspec(dllexport) ";
+ else
+ Result += "__declspec(dllimport) ";
+
+ Result += "struct _class_t ";
+ Result += VarName;
+ Result += SuperClass->getNameAsString();
+ Result += ";\n";
+
+ if (metaclass && RootClass != SuperClass) {
+ Result += "extern \"C\" ";
+ if (RootClass->getImplementation())
+ Result += "__declspec(dllexport) ";
+ else
+ Result += "__declspec(dllimport) ";
+
+ Result += "struct _class_t ";
+ Result += VarName;
+ Result += RootClass->getNameAsString();
+ Result += ";\n";
+ }
+ }
+
+ Result += "\nextern \"C\" __declspec(dllexport) struct _class_t ";
+ Result += VarName; Result += CDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__DATA,__objc_data\"))) = {\n";
+ Result += "\t";
+ if (metaclass) {
+ if (!rootClass) {
+ Result += "0, // &"; Result += VarName;
+ Result += RootClass->getNameAsString();
+ Result += ",\n\t";
+ Result += "0, // &"; Result += VarName;
+ Result += CDecl->getSuperClass()->getNameAsString();
+ Result += ",\n\t";
+ }
+ else {
+ Result += "0, // &"; Result += VarName;
+ Result += CDecl->getNameAsString();
+ Result += ",\n\t";
+ Result += "0, // &OBJC_CLASS_$_"; Result += CDecl->getNameAsString();
+ Result += ",\n\t";
+ }
+ }
+ else {
+ Result += "0, // &OBJC_METACLASS_$_";
+ Result += CDecl->getNameAsString();
+ Result += ",\n\t";
+ if (!rootClass) {
+ Result += "0, // &"; Result += VarName;
+ Result += CDecl->getSuperClass()->getNameAsString();
+ Result += ",\n\t";
+ }
+ else
+ Result += "0,\n\t";
+ }
+ Result += "0, // (void *)&_objc_empty_cache,\n\t";
+ Result += "0, // unused, was (void *)&_objc_empty_vtable,\n\t";
+ if (metaclass)
+ Result += "&_OBJC_METACLASS_RO_$_";
+ else
+ Result += "&_OBJC_CLASS_RO_$_";
+ Result += CDecl->getNameAsString();
+ Result += ",\n};\n";
+
+ // Add static function to initialize some of the meta-data fields.
+ // avoid doing it twice.
+ if (metaclass)
+ return;
+
+ const ObjCInterfaceDecl *SuperClass =
+ rootClass ? CDecl : CDecl->getSuperClass();
+
+ Result += "static void OBJC_CLASS_SETUP_$_";
+ Result += CDecl->getNameAsString();
+ Result += "(void ) {\n";
+ Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
+ Result += ".isa = "; Result += "&OBJC_METACLASS_$_";
+ Result += RootClass->getNameAsString(); Result += ";\n";
+
+ Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
+ Result += ".superclass = ";
+ if (rootClass)
+ Result += "&OBJC_CLASS_$_";
+ else
+ Result += "&OBJC_METACLASS_$_";
+
+ Result += SuperClass->getNameAsString(); Result += ";\n";
+
+ Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
+ Result += ".cache = "; Result += "&_objc_empty_cache"; Result += ";\n";
+
+ Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
+ Result += ".isa = "; Result += "&OBJC_METACLASS_$_";
+ Result += CDecl->getNameAsString(); Result += ";\n";
+
+ if (!rootClass) {
+ Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
+ Result += ".superclass = "; Result += "&OBJC_CLASS_$_";
+ Result += SuperClass->getNameAsString(); Result += ";\n";
+ }
+
+ Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
+ Result += ".cache = "; Result += "&_objc_empty_cache"; Result += ";\n";
+ Result += "}\n";
+}
+
+static void Write_category_t(RewriteModernObjC &RewriteObj, ASTContext *Context,
+ std::string &Result,
+ ObjCCategoryDecl *CatDecl,
+ ObjCInterfaceDecl *ClassDecl,
+ ArrayRef<ObjCMethodDecl *> InstanceMethods,
+ ArrayRef<ObjCMethodDecl *> ClassMethods,
+ ArrayRef<ObjCProtocolDecl *> RefedProtocols,
+ ArrayRef<ObjCPropertyDecl *> ClassProperties) {
+ StringRef CatName = CatDecl->getName();
+ StringRef ClassName = ClassDecl->getName();
+ // must declare an extern class object in case this class is not implemented
+ // in this TU.
+ Result += "\n";
+ Result += "extern \"C\" ";
+ if (ClassDecl->getImplementation())
+ Result += "__declspec(dllexport) ";
+ else
+ Result += "__declspec(dllimport) ";
+
+ Result += "struct _class_t ";
+ Result += "OBJC_CLASS_$_"; Result += ClassName;
+ Result += ";\n";
+
+ Result += "\nstatic struct _category_t ";
+ Result += "_OBJC_$_CATEGORY_";
+ Result += ClassName; Result += "_$_"; Result += CatName;
+ Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = \n";
+ Result += "{\n";
+ Result += "\t\""; Result += ClassName; Result += "\",\n";
+ Result += "\t0, // &"; Result += "OBJC_CLASS_$_"; Result += ClassName;
+ Result += ",\n";
+ if (InstanceMethods.size() > 0) {
+ Result += "\t(const struct _method_list_t *)&";
+ Result += "_OBJC_$_CATEGORY_INSTANCE_METHODS_";
+ Result += ClassName; Result += "_$_"; Result += CatName;
+ Result += ",\n";
+ }
+ else
+ Result += "\t0,\n";
+
+ if (ClassMethods.size() > 0) {
+ Result += "\t(const struct _method_list_t *)&";
+ Result += "_OBJC_$_CATEGORY_CLASS_METHODS_";
+ Result += ClassName; Result += "_$_"; Result += CatName;
+ Result += ",\n";
+ }
+ else
+ Result += "\t0,\n";
+
+ if (RefedProtocols.size() > 0) {
+ Result += "\t(const struct _protocol_list_t *)&";
+ Result += "_OBJC_CATEGORY_PROTOCOLS_$_";
+ Result += ClassName; Result += "_$_"; Result += CatName;
+ Result += ",\n";
+ }
+ else
+ Result += "\t0,\n";
+
+ if (ClassProperties.size() > 0) {
+ Result += "\t(const struct _prop_list_t *)&"; Result += "_OBJC_$_PROP_LIST_";
+ Result += ClassName; Result += "_$_"; Result += CatName;
+ Result += ",\n";
+ }
+ else
+ Result += "\t0,\n";
+
+ Result += "};\n";
+
+ // Add static function to initialize the class pointer in the category structure.
+ Result += "static void OBJC_CATEGORY_SETUP_$_";
+ Result += ClassDecl->getNameAsString();
+ Result += "_$_";
+ Result += CatName;
+ Result += "(void ) {\n";
+ Result += "\t_OBJC_$_CATEGORY_";
+ Result += ClassDecl->getNameAsString();
+ Result += "_$_";
+ Result += CatName;
+ Result += ".cls = "; Result += "&OBJC_CLASS_$_"; Result += ClassName;
+ Result += ";\n}\n";
+}
+
+static void Write__extendedMethodTypes_initializer(RewriteModernObjC &RewriteObj,
+ ASTContext *Context, std::string &Result,
+ ArrayRef<ObjCMethodDecl *> Methods,
+ StringRef VarName,
+ StringRef ProtocolName) {
+ if (Methods.size() == 0)
+ return;
+
+ Result += "\nstatic const char *";
+ Result += VarName; Result += ProtocolName;
+ Result += " [] __attribute__ ((used, section (\"__DATA,__objc_const\"))) = \n";
+ Result += "{\n";
+ for (unsigned i = 0, e = Methods.size(); i < e; i++) {
+ ObjCMethodDecl *MD = Methods[i];
+ std::string MethodTypeString, QuoteMethodTypeString;
+ Context->getObjCEncodingForMethodDecl(MD, MethodTypeString, true);
+ RewriteObj.QuoteDoublequotes(MethodTypeString, QuoteMethodTypeString);
+ Result += "\t\""; Result += QuoteMethodTypeString; Result += "\"";
+ if (i == e-1)
+ Result += "\n};\n";
+ else {
+ Result += ",\n";
+ }
+ }
+}
+
+static void Write_IvarOffsetVar(RewriteModernObjC &RewriteObj,
+ ASTContext *Context,
+ std::string &Result,
+ ArrayRef<ObjCIvarDecl *> Ivars,
+ ObjCInterfaceDecl *CDecl) {
+ // FIXME. visibilty of offset symbols may have to be set; for Darwin
+ // this is what happens:
+ /**
+ if (Ivar->getAccessControl() == ObjCIvarDecl::Private ||
+ Ivar->getAccessControl() == ObjCIvarDecl::Package ||
+ Class->getVisibility() == HiddenVisibility)
+ Visibility shoud be: HiddenVisibility;
+ else
+ Visibility shoud be: DefaultVisibility;
+ */
+
+ Result += "\n";
+ for (unsigned i =0, e = Ivars.size(); i < e; i++) {
+ ObjCIvarDecl *IvarDecl = Ivars[i];
+ if (Context->getLangOpts().MicrosoftExt)
+ Result += "__declspec(allocate(\".objc_ivar$B\")) ";
+
+ if (!Context->getLangOpts().MicrosoftExt ||
+ IvarDecl->getAccessControl() == ObjCIvarDecl::Private ||
+ IvarDecl->getAccessControl() == ObjCIvarDecl::Package)
+ Result += "extern \"C\" unsigned long int ";
+ else
+ Result += "extern \"C\" __declspec(dllexport) unsigned long int ";
+ WriteInternalIvarName(CDecl, IvarDecl, Result);
+ Result += " __attribute__ ((used, section (\"__DATA,__objc_ivar\")))";
+ Result += " = ";
+ RewriteObj.RewriteIvarOffsetComputation(IvarDecl, Result);
+ Result += ";\n";
+ }
+}
+
+static void Write__ivar_list_t_initializer(RewriteModernObjC &RewriteObj,
+ ASTContext *Context, std::string &Result,
+ ArrayRef<ObjCIvarDecl *> Ivars,
+ StringRef VarName,
+ ObjCInterfaceDecl *CDecl) {
+ if (Ivars.size() > 0) {
+ Write_IvarOffsetVar(RewriteObj, Context, Result, Ivars, CDecl);
+
+ Result += "\nstatic ";
+ Write__ivar_list_t_TypeDecl(Result, Ivars.size());
+ Result += " "; Result += VarName;
+ Result += CDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
+ Result += "\t"; Result += "sizeof(_ivar_t)"; Result += ",\n";
+ Result += "\t"; Result += utostr(Ivars.size()); Result += ",\n";
+ for (unsigned i =0, e = Ivars.size(); i < e; i++) {
+ ObjCIvarDecl *IvarDecl = Ivars[i];
+ if (i == 0)
+ Result += "\t{{";
+ else
+ Result += "\t {";
+ Result += "(unsigned long int *)&";
+ WriteInternalIvarName(CDecl, IvarDecl, Result);
+ Result += ", ";
+
+ Result += "\""; Result += IvarDecl->getName(); Result += "\", ";
+ std::string IvarTypeString, QuoteIvarTypeString;
+ Context->getObjCEncodingForType(IvarDecl->getType(), IvarTypeString,
+ IvarDecl);
+ RewriteObj.QuoteDoublequotes(IvarTypeString, QuoteIvarTypeString);
+ Result += "\""; Result += QuoteIvarTypeString; Result += "\", ";
+
+ // FIXME. this alignment represents the host alignment and need be changed to
+ // represent the target alignment.
+ unsigned Align = Context->getTypeAlign(IvarDecl->getType())/8;
+ Align = llvm::Log2_32(Align);
+ Result += llvm::utostr(Align); Result += ", ";
+ CharUnits Size = Context->getTypeSizeInChars(IvarDecl->getType());
+ Result += llvm::utostr(Size.getQuantity());
+ if (i == e-1)
+ Result += "}}\n";
+ else
+ Result += "},\n";
+ }
+ Result += "};\n";
+ }
+}
+
+/// RewriteObjCProtocolMetaData - Rewrite protocols meta-data.
+void RewriteModernObjC::RewriteObjCProtocolMetaData(ObjCProtocolDecl *PDecl,
+ std::string &Result) {
+
+ // Do not synthesize the protocol more than once.
+ if (ObjCSynthesizedProtocols.count(PDecl->getCanonicalDecl()))
+ return;
+ WriteModernMetadataDeclarations(Context, Result);
+
+ if (ObjCProtocolDecl *Def = PDecl->getDefinition())
+ PDecl = Def;
+ // Must write out all protocol definitions in current qualifier list,
+ // and in their nested qualifiers before writing out current definition.
+ for (ObjCProtocolDecl::protocol_iterator I = PDecl->protocol_begin(),
+ E = PDecl->protocol_end(); I != E; ++I)
+ RewriteObjCProtocolMetaData(*I, Result);
+
+ // Construct method lists.
+ std::vector<ObjCMethodDecl *> InstanceMethods, ClassMethods;
+ std::vector<ObjCMethodDecl *> OptInstanceMethods, OptClassMethods;
+ for (ObjCProtocolDecl::instmeth_iterator
+ I = PDecl->instmeth_begin(), E = PDecl->instmeth_end();
+ I != E; ++I) {
+ ObjCMethodDecl *MD = *I;
+ if (MD->getImplementationControl() == ObjCMethodDecl::Optional) {
+ OptInstanceMethods.push_back(MD);
+ } else {
+ InstanceMethods.push_back(MD);
+ }
+ }
+
+ for (ObjCProtocolDecl::classmeth_iterator
+ I = PDecl->classmeth_begin(), E = PDecl->classmeth_end();
+ I != E; ++I) {
+ ObjCMethodDecl *MD = *I;
+ if (MD->getImplementationControl() == ObjCMethodDecl::Optional) {
+ OptClassMethods.push_back(MD);
+ } else {
+ ClassMethods.push_back(MD);
+ }
+ }
+ std::vector<ObjCMethodDecl *> AllMethods;
+ for (unsigned i = 0, e = InstanceMethods.size(); i < e; i++)
+ AllMethods.push_back(InstanceMethods[i]);
+ for (unsigned i = 0, e = ClassMethods.size(); i < e; i++)
+ AllMethods.push_back(ClassMethods[i]);
+ for (unsigned i = 0, e = OptInstanceMethods.size(); i < e; i++)
+ AllMethods.push_back(OptInstanceMethods[i]);
+ for (unsigned i = 0, e = OptClassMethods.size(); i < e; i++)
+ AllMethods.push_back(OptClassMethods[i]);
+
+ Write__extendedMethodTypes_initializer(*this, Context, Result,
+ AllMethods,
+ "_OBJC_PROTOCOL_METHOD_TYPES_",
+ PDecl->getNameAsString());
+ // Protocol's super protocol list
+ std::vector<ObjCProtocolDecl *> SuperProtocols;
+ for (ObjCProtocolDecl::protocol_iterator I = PDecl->protocol_begin(),
+ E = PDecl->protocol_end(); I != E; ++I)
+ SuperProtocols.push_back(*I);
+
+ Write_protocol_list_initializer(Context, Result, SuperProtocols,
+ "_OBJC_PROTOCOL_REFS_",
+ PDecl->getNameAsString());
+
+ Write_method_list_t_initializer(*this, Context, Result, InstanceMethods,
+ "_OBJC_PROTOCOL_INSTANCE_METHODS_",
+ PDecl->getNameAsString(), false);
+
+ Write_method_list_t_initializer(*this, Context, Result, ClassMethods,
+ "_OBJC_PROTOCOL_CLASS_METHODS_",
+ PDecl->getNameAsString(), false);
+
+ Write_method_list_t_initializer(*this, Context, Result, OptInstanceMethods,
+ "_OBJC_PROTOCOL_OPT_INSTANCE_METHODS_",
+ PDecl->getNameAsString(), false);
+
+ Write_method_list_t_initializer(*this, Context, Result, OptClassMethods,
+ "_OBJC_PROTOCOL_OPT_CLASS_METHODS_",
+ PDecl->getNameAsString(), false);
+
+ // Protocol's property metadata.
+ std::vector<ObjCPropertyDecl *> ProtocolProperties;
+ for (ObjCContainerDecl::prop_iterator I = PDecl->prop_begin(),
+ E = PDecl->prop_end(); I != E; ++I)
+ ProtocolProperties.push_back(*I);
+
+ Write_prop_list_t_initializer(*this, Context, Result, ProtocolProperties,
+ /* Container */0,
+ "_OBJC_PROTOCOL_PROPERTIES_",
+ PDecl->getNameAsString());
+
+ // Writer out root metadata for current protocol: struct _protocol_t
+ Result += "\n";
+ if (LangOpts.MicrosoftExt)
+ Result += "static ";
+ Result += "struct _protocol_t _OBJC_PROTOCOL_";
+ Result += PDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__DATA,__datacoal_nt,coalesced\"))) = {\n";
+ Result += "\t0,\n"; // id is; is null
+ Result += "\t\""; Result += PDecl->getNameAsString(); Result += "\",\n";
+ if (SuperProtocols.size() > 0) {
+ Result += "\t(const struct _protocol_list_t *)&"; Result += "_OBJC_PROTOCOL_REFS_";
+ Result += PDecl->getNameAsString(); Result += ",\n";
+ }
+ else
+ Result += "\t0,\n";
+ if (InstanceMethods.size() > 0) {
+ Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_INSTANCE_METHODS_";
+ Result += PDecl->getNameAsString(); Result += ",\n";
+ }
+ else
+ Result += "\t0,\n";
+
+ if (ClassMethods.size() > 0) {
+ Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_CLASS_METHODS_";
+ Result += PDecl->getNameAsString(); Result += ",\n";
+ }
+ else
+ Result += "\t0,\n";
+
+ if (OptInstanceMethods.size() > 0) {
+ Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_OPT_INSTANCE_METHODS_";
+ Result += PDecl->getNameAsString(); Result += ",\n";
+ }
+ else
+ Result += "\t0,\n";
+
+ if (OptClassMethods.size() > 0) {
+ Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_OPT_CLASS_METHODS_";
+ Result += PDecl->getNameAsString(); Result += ",\n";
+ }
+ else
+ Result += "\t0,\n";
+
+ if (ProtocolProperties.size() > 0) {
+ Result += "\t(const struct _prop_list_t *)&_OBJC_PROTOCOL_PROPERTIES_";
+ Result += PDecl->getNameAsString(); Result += ",\n";
+ }
+ else
+ Result += "\t0,\n";
+
+ Result += "\t"; Result += "sizeof(_protocol_t)"; Result += ",\n";
+ Result += "\t0,\n";
+
+ if (AllMethods.size() > 0) {
+ Result += "\t(const char **)&"; Result += "_OBJC_PROTOCOL_METHOD_TYPES_";
+ Result += PDecl->getNameAsString();
+ Result += "\n};\n";
+ }
+ else
+ Result += "\t0\n};\n";
+
+ if (LangOpts.MicrosoftExt)
+ Result += "static ";
+ Result += "struct _protocol_t *";
+ Result += "_OBJC_LABEL_PROTOCOL_$_"; Result += PDecl->getNameAsString();
+ Result += " = &_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
+ Result += ";\n";
+
+ // Mark this protocol as having been generated.
+ if (!ObjCSynthesizedProtocols.insert(PDecl->getCanonicalDecl()))
+ llvm_unreachable("protocol already synthesized");
+
+}
+
+void RewriteModernObjC::RewriteObjCProtocolListMetaData(
+ const ObjCList<ObjCProtocolDecl> &Protocols,
+ StringRef prefix, StringRef ClassName,
+ std::string &Result) {
+ if (Protocols.empty()) return;
+
+ for (unsigned i = 0; i != Protocols.size(); i++)
+ RewriteObjCProtocolMetaData(Protocols[i], Result);
+
+ // Output the top lovel protocol meta-data for the class.
+ /* struct _objc_protocol_list {
+ struct _objc_protocol_list *next;
+ int protocol_count;
+ struct _objc_protocol *class_protocols[];
+ }
+ */
+ Result += "\n";
+ if (LangOpts.MicrosoftExt)
+ Result += "__declspec(allocate(\".cat_cls_meth$B\")) ";
+ Result += "static struct {\n";
+ Result += "\tstruct _objc_protocol_list *next;\n";
+ Result += "\tint protocol_count;\n";
+ Result += "\tstruct _objc_protocol *class_protocols[";
+ Result += utostr(Protocols.size());
+ Result += "];\n} _OBJC_";
+ Result += prefix;
+ Result += "_PROTOCOLS_";
+ Result += ClassName;
+ Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= "
+ "{\n\t0, ";
+ Result += utostr(Protocols.size());
+ Result += "\n";
+
+ Result += "\t,{&_OBJC_PROTOCOL_";
+ Result += Protocols[0]->getNameAsString();
+ Result += " \n";
+
+ for (unsigned i = 1; i != Protocols.size(); i++) {
+ Result += "\t ,&_OBJC_PROTOCOL_";
+ Result += Protocols[i]->getNameAsString();
+ Result += "\n";
+ }
+ Result += "\t }\n};\n";
+}
+
+/// hasObjCExceptionAttribute - Return true if this class or any super
+/// class has the __objc_exception__ attribute.
+/// FIXME. Move this to ASTContext.cpp as it is also used for IRGen.
+static bool hasObjCExceptionAttribute(ASTContext &Context,
+ const ObjCInterfaceDecl *OID) {
+ if (OID->hasAttr<ObjCExceptionAttr>())
+ return true;
+ if (const ObjCInterfaceDecl *Super = OID->getSuperClass())
+ return hasObjCExceptionAttribute(Context, Super);
+ return false;
+}
+
+void RewriteModernObjC::RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
+ std::string &Result) {
+ ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
+
+ // Explicitly declared @interface's are already synthesized.
+ if (CDecl->isImplicitInterfaceDecl())
+ assert(false &&
+ "Legacy implicit interface rewriting not supported in moder abi");
+
+ WriteModernMetadataDeclarations(Context, Result);
+ SmallVector<ObjCIvarDecl *, 8> IVars;
+
+ for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
+ IVD; IVD = IVD->getNextIvar()) {
+ // Ignore unnamed bit-fields.
+ if (!IVD->getDeclName())
+ continue;
+ IVars.push_back(IVD);
+ }
+
+ Write__ivar_list_t_initializer(*this, Context, Result, IVars,
+ "_OBJC_$_INSTANCE_VARIABLES_",
+ CDecl);
+
+ // Build _objc_method_list for class's instance methods if needed
+ SmallVector<ObjCMethodDecl *, 32>
+ InstanceMethods(IDecl->instmeth_begin(), IDecl->instmeth_end());
+
+ // If any of our property implementations have associated getters or
+ // setters, produce metadata for them as well.
+ for (ObjCImplDecl::propimpl_iterator Prop = IDecl->propimpl_begin(),
+ PropEnd = IDecl->propimpl_end();
+ Prop != PropEnd; ++Prop) {
+ if ((*Prop)->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
+ continue;
+ if (!(*Prop)->getPropertyIvarDecl())
+ continue;
+ ObjCPropertyDecl *PD = (*Prop)->getPropertyDecl();
+ if (!PD)
+ continue;
+ if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
+ if (!Getter->isDefined())
+ InstanceMethods.push_back(Getter);
+ if (PD->isReadOnly())
+ continue;
+ if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
+ if (!Setter->isDefined())
+ InstanceMethods.push_back(Setter);
+ }
+
+ Write_method_list_t_initializer(*this, Context, Result, InstanceMethods,
+ "_OBJC_$_INSTANCE_METHODS_",
+ IDecl->getNameAsString(), true);
+
+ SmallVector<ObjCMethodDecl *, 32>
+ ClassMethods(IDecl->classmeth_begin(), IDecl->classmeth_end());
+
+ Write_method_list_t_initializer(*this, Context, Result, ClassMethods,
+ "_OBJC_$_CLASS_METHODS_",
+ IDecl->getNameAsString(), true);
+
+ // Protocols referenced in class declaration?
+ // Protocol's super protocol list
+ std::vector<ObjCProtocolDecl *> RefedProtocols;
+ const ObjCList<ObjCProtocolDecl> &Protocols = CDecl->getReferencedProtocols();
+ for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
+ E = Protocols.end();
+ I != E; ++I) {
+ RefedProtocols.push_back(*I);
+ // Must write out all protocol definitions in current qualifier list,
+ // and in their nested qualifiers before writing out current definition.
+ RewriteObjCProtocolMetaData(*I, Result);
+ }
+
+ Write_protocol_list_initializer(Context, Result,
+ RefedProtocols,
+ "_OBJC_CLASS_PROTOCOLS_$_",
+ IDecl->getNameAsString());
+
+ // Protocol's property metadata.
+ std::vector<ObjCPropertyDecl *> ClassProperties;
+ for (ObjCContainerDecl::prop_iterator I = CDecl->prop_begin(),
+ E = CDecl->prop_end(); I != E; ++I)
+ ClassProperties.push_back(*I);
+
+ Write_prop_list_t_initializer(*this, Context, Result, ClassProperties,
+ /* Container */IDecl,
+ "_OBJC_$_PROP_LIST_",
+ CDecl->getNameAsString());
+
+
+ // Data for initializing _class_ro_t metaclass meta-data
+ uint32_t flags = CLS_META;
+ std::string InstanceSize;
+ std::string InstanceStart;
+
+
+ bool classIsHidden = CDecl->getVisibility() == HiddenVisibility;
+ if (classIsHidden)
+ flags |= OBJC2_CLS_HIDDEN;
+
+ if (!CDecl->getSuperClass())
+ // class is root
+ flags |= CLS_ROOT;
+ InstanceSize = "sizeof(struct _class_t)";
+ InstanceStart = InstanceSize;
+ Write__class_ro_t_initializer(Context, Result, flags,
+ InstanceStart, InstanceSize,
+ ClassMethods,
+ 0,
+ 0,
+ 0,
+ "_OBJC_METACLASS_RO_$_",
+ CDecl->getNameAsString());
+
+
+ // Data for initializing _class_ro_t meta-data
+ flags = CLS;
+ if (classIsHidden)
+ flags |= OBJC2_CLS_HIDDEN;
+
+ if (hasObjCExceptionAttribute(*Context, CDecl))
+ flags |= CLS_EXCEPTION;
+
+ if (!CDecl->getSuperClass())
+ // class is root
+ flags |= CLS_ROOT;
+
+ InstanceSize.clear();
+ InstanceStart.clear();
+ if (!ObjCSynthesizedStructs.count(CDecl)) {
+ InstanceSize = "0";
+ InstanceStart = "0";
+ }
+ else {
+ InstanceSize = "sizeof(struct ";
+ InstanceSize += CDecl->getNameAsString();
+ InstanceSize += "_IMPL)";
+
+ ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
+ if (IVD) {
+ RewriteIvarOffsetComputation(IVD, InstanceStart);
+ }
+ else
+ InstanceStart = InstanceSize;
+ }
+ Write__class_ro_t_initializer(Context, Result, flags,
+ InstanceStart, InstanceSize,
+ InstanceMethods,
+ RefedProtocols,
+ IVars,
+ ClassProperties,
+ "_OBJC_CLASS_RO_$_",
+ CDecl->getNameAsString());
+
+ Write_class_t(Context, Result,
+ "OBJC_METACLASS_$_",
+ CDecl, /*metaclass*/true);
+
+ Write_class_t(Context, Result,
+ "OBJC_CLASS_$_",
+ CDecl, /*metaclass*/false);
+
+ if (ImplementationIsNonLazy(IDecl))
+ DefinedNonLazyClasses.push_back(CDecl);
+
+}
+
+void RewriteModernObjC::RewriteClassSetupInitHook(std::string &Result) {
+ int ClsDefCount = ClassImplementation.size();
+ if (!ClsDefCount)
+ return;
+ Result += "#pragma section(\".objc_inithooks$B\", long, read, write)\n";
+ Result += "__declspec(allocate(\".objc_inithooks$B\")) ";
+ Result += "static void *OBJC_CLASS_SETUP[] = {\n";
+ for (int i = 0; i < ClsDefCount; i++) {
+ ObjCImplementationDecl *IDecl = ClassImplementation[i];
+ ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
+ Result += "\t(void *)&OBJC_CLASS_SETUP_$_";
+ Result += CDecl->getName(); Result += ",\n";
+ }
+ Result += "};\n";
+}
+
+void RewriteModernObjC::RewriteMetaDataIntoBuffer(std::string &Result) {
+ int ClsDefCount = ClassImplementation.size();
+ int CatDefCount = CategoryImplementation.size();
+
+ // For each implemented class, write out all its meta data.
+ for (int i = 0; i < ClsDefCount; i++)
+ RewriteObjCClassMetaData(ClassImplementation[i], Result);
+
+ RewriteClassSetupInitHook(Result);
+
+ // For each implemented category, write out all its meta data.
+ for (int i = 0; i < CatDefCount; i++)
+ RewriteObjCCategoryImplDecl(CategoryImplementation[i], Result);
+
+ RewriteCategorySetupInitHook(Result);
+
+ if (ClsDefCount > 0) {
+ if (LangOpts.MicrosoftExt)
+ Result += "__declspec(allocate(\".objc_classlist$B\")) ";
+ Result += "static struct _class_t *L_OBJC_LABEL_CLASS_$ [";
+ Result += llvm::utostr(ClsDefCount); Result += "]";
+ Result +=
+ " __attribute__((used, section (\"__DATA, __objc_classlist,"
+ "regular,no_dead_strip\")))= {\n";
+ for (int i = 0; i < ClsDefCount; i++) {
+ Result += "\t&OBJC_CLASS_$_";
+ Result += ClassImplementation[i]->getNameAsString();
+ Result += ",\n";
+ }
+ Result += "};\n";
+
+ if (!DefinedNonLazyClasses.empty()) {
+ if (LangOpts.MicrosoftExt)
+ Result += "__declspec(allocate(\".objc_nlclslist$B\")) \n";
+ Result += "static struct _class_t *_OBJC_LABEL_NONLAZY_CLASS_$[] = {\n\t";
+ for (unsigned i = 0, e = DefinedNonLazyClasses.size(); i < e; i++) {
+ Result += "\t&OBJC_CLASS_$_"; Result += DefinedNonLazyClasses[i]->getNameAsString();
+ Result += ",\n";
+ }
+ Result += "};\n";
+ }
+ }
+
+ if (CatDefCount > 0) {
+ if (LangOpts.MicrosoftExt)
+ Result += "__declspec(allocate(\".objc_catlist$B\")) ";
+ Result += "static struct _category_t *L_OBJC_LABEL_CATEGORY_$ [";
+ Result += llvm::utostr(CatDefCount); Result += "]";
+ Result +=
+ " __attribute__((used, section (\"__DATA, __objc_catlist,"
+ "regular,no_dead_strip\")))= {\n";
+ for (int i = 0; i < CatDefCount; i++) {
+ Result += "\t&_OBJC_$_CATEGORY_";
+ Result +=
+ CategoryImplementation[i]->getClassInterface()->getNameAsString();
+ Result += "_$_";
+ Result += CategoryImplementation[i]->getNameAsString();
+ Result += ",\n";
+ }
+ Result += "};\n";
+ }
+
+ if (!DefinedNonLazyCategories.empty()) {
+ if (LangOpts.MicrosoftExt)
+ Result += "__declspec(allocate(\".objc_nlcatlist$B\")) \n";
+ Result += "static struct _category_t *_OBJC_LABEL_NONLAZY_CATEGORY_$[] = {\n\t";
+ for (unsigned i = 0, e = DefinedNonLazyCategories.size(); i < e; i++) {
+ Result += "\t&_OBJC_$_CATEGORY_";
+ Result +=
+ DefinedNonLazyCategories[i]->getClassInterface()->getNameAsString();
+ Result += "_$_";
+ Result += DefinedNonLazyCategories[i]->getNameAsString();
+ Result += ",\n";
+ }
+ Result += "};\n";
+ }
+}
+
+void RewriteModernObjC::WriteImageInfo(std::string &Result) {
+ if (LangOpts.MicrosoftExt)
+ Result += "__declspec(allocate(\".objc_imageinfo$B\")) \n";
+
+ Result += "static struct IMAGE_INFO { unsigned version; unsigned flag; } ";
+ // version 0, ObjCABI is 2
+ Result += "_OBJC_IMAGE_INFO = { 0, 2 };\n";
+}
+
+/// RewriteObjCCategoryImplDecl - Rewrite metadata for each category
+/// implementation.
+void RewriteModernObjC::RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *IDecl,
+ std::string &Result) {
+ WriteModernMetadataDeclarations(Context, Result);
+ ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
+ // Find category declaration for this implementation.
+ ObjCCategoryDecl *CDecl=0;
+ for (CDecl = ClassDecl->getCategoryList(); CDecl;
+ CDecl = CDecl->getNextClassCategory())
+ if (CDecl->getIdentifier() == IDecl->getIdentifier())
+ break;
+
+ std::string FullCategoryName = ClassDecl->getNameAsString();
+ FullCategoryName += "_$_";
+ FullCategoryName += CDecl->getNameAsString();
+
+ // Build _objc_method_list for class's instance methods if needed
+ SmallVector<ObjCMethodDecl *, 32>
+ InstanceMethods(IDecl->instmeth_begin(), IDecl->instmeth_end());
+
+ // If any of our property implementations have associated getters or
+ // setters, produce metadata for them as well.
+ for (ObjCImplDecl::propimpl_iterator Prop = IDecl->propimpl_begin(),
+ PropEnd = IDecl->propimpl_end();
+ Prop != PropEnd; ++Prop) {
+ if ((*Prop)->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
+ continue;
+ if (!(*Prop)->getPropertyIvarDecl())
+ continue;
+ ObjCPropertyDecl *PD = (*Prop)->getPropertyDecl();
+ if (!PD)
+ continue;
+ if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
+ InstanceMethods.push_back(Getter);
+ if (PD->isReadOnly())
+ continue;
+ if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
+ InstanceMethods.push_back(Setter);
+ }
+
+ Write_method_list_t_initializer(*this, Context, Result, InstanceMethods,
+ "_OBJC_$_CATEGORY_INSTANCE_METHODS_",
+ FullCategoryName, true);
+
+ SmallVector<ObjCMethodDecl *, 32>
+ ClassMethods(IDecl->classmeth_begin(), IDecl->classmeth_end());
+
+ Write_method_list_t_initializer(*this, Context, Result, ClassMethods,
+ "_OBJC_$_CATEGORY_CLASS_METHODS_",
+ FullCategoryName, true);
+
+ // Protocols referenced in class declaration?
+ // Protocol's super protocol list
+ std::vector<ObjCProtocolDecl *> RefedProtocols;
+ for (ObjCInterfaceDecl::protocol_iterator I = CDecl->protocol_begin(),
+ E = CDecl->protocol_end();
+
+ I != E; ++I) {
+ RefedProtocols.push_back(*I);
+ // Must write out all protocol definitions in current qualifier list,
+ // and in their nested qualifiers before writing out current definition.
+ RewriteObjCProtocolMetaData(*I, Result);
+ }
+
+ Write_protocol_list_initializer(Context, Result,
+ RefedProtocols,
+ "_OBJC_CATEGORY_PROTOCOLS_$_",
+ FullCategoryName);
+
+ // Protocol's property metadata.
+ std::vector<ObjCPropertyDecl *> ClassProperties;
+ for (ObjCContainerDecl::prop_iterator I = CDecl->prop_begin(),
+ E = CDecl->prop_end(); I != E; ++I)
+ ClassProperties.push_back(*I);
+
+ Write_prop_list_t_initializer(*this, Context, Result, ClassProperties,
+ /* Container */0,
+ "_OBJC_$_PROP_LIST_",
+ FullCategoryName);
+
+ Write_category_t(*this, Context, Result,
+ CDecl,
+ ClassDecl,
+ InstanceMethods,
+ ClassMethods,
+ RefedProtocols,
+ ClassProperties);
+
+ // Determine if this category is also "non-lazy".
+ if (ImplementationIsNonLazy(IDecl))
+ DefinedNonLazyCategories.push_back(CDecl);
+
+}
+
+void RewriteModernObjC::RewriteCategorySetupInitHook(std::string &Result) {
+ int CatDefCount = CategoryImplementation.size();
+ if (!CatDefCount)
+ return;
+ Result += "#pragma section(\".objc_inithooks$B\", long, read, write)\n";
+ Result += "__declspec(allocate(\".objc_inithooks$B\")) ";
+ Result += "static void *OBJC_CATEGORY_SETUP[] = {\n";
+ for (int i = 0; i < CatDefCount; i++) {
+ ObjCCategoryImplDecl *IDecl = CategoryImplementation[i];
+ ObjCCategoryDecl *CatDecl= IDecl->getCategoryDecl();
+ ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
+ Result += "\t(void *)&OBJC_CATEGORY_SETUP_$_";
+ Result += ClassDecl->getName();
+ Result += "_$_";
+ Result += CatDecl->getName();
+ Result += ",\n";
+ }
+ Result += "};\n";
+}
+
+// RewriteObjCMethodsMetaData - Rewrite methods metadata for instance or
+/// class methods.
+template<typename MethodIterator>
+void RewriteModernObjC::RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
+ MethodIterator MethodEnd,
+ bool IsInstanceMethod,
+ StringRef prefix,
+ StringRef ClassName,
+ std::string &Result) {
+ if (MethodBegin == MethodEnd) return;
+
+ if (!objc_impl_method) {
+ /* struct _objc_method {
+ SEL _cmd;
+ char *method_types;
+ void *_imp;
+ }
+ */
+ Result += "\nstruct _objc_method {\n";
+ Result += "\tSEL _cmd;\n";
+ Result += "\tchar *method_types;\n";
+ Result += "\tvoid *_imp;\n";
+ Result += "};\n";
+
+ objc_impl_method = true;
+ }
+
+ // Build _objc_method_list for class's methods if needed
+
+ /* struct {
+ struct _objc_method_list *next_method;
+ int method_count;
+ struct _objc_method method_list[];
+ }
+ */
+ unsigned NumMethods = std::distance(MethodBegin, MethodEnd);
+ Result += "\n";
+ if (LangOpts.MicrosoftExt) {
+ if (IsInstanceMethod)
+ Result += "__declspec(allocate(\".inst_meth$B\")) ";
+ else
+ Result += "__declspec(allocate(\".cls_meth$B\")) ";
+ }
+ Result += "static struct {\n";
+ Result += "\tstruct _objc_method_list *next_method;\n";
+ Result += "\tint method_count;\n";
+ Result += "\tstruct _objc_method method_list[";
+ Result += utostr(NumMethods);
+ Result += "];\n} _OBJC_";
+ Result += prefix;
+ Result += IsInstanceMethod ? "INSTANCE" : "CLASS";
+ Result += "_METHODS_";
+ Result += ClassName;
+ Result += " __attribute__ ((used, section (\"__OBJC, __";
+ Result += IsInstanceMethod ? "inst" : "cls";
+ Result += "_meth\")))= ";
+ Result += "{\n\t0, " + utostr(NumMethods) + "\n";
+
+ Result += "\t,{{(SEL)\"";
+ Result += (*MethodBegin)->getSelector().getAsString().c_str();
+ std::string MethodTypeString;
+ Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
+ Result += "\", \"";
+ Result += MethodTypeString;
+ Result += "\", (void *)";
+ Result += MethodInternalNames[*MethodBegin];
+ Result += "}\n";
+ for (++MethodBegin; MethodBegin != MethodEnd; ++MethodBegin) {
+ Result += "\t ,{(SEL)\"";
+ Result += (*MethodBegin)->getSelector().getAsString().c_str();
+ std::string MethodTypeString;
+ Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
+ Result += "\", \"";
+ Result += MethodTypeString;
+ Result += "\", (void *)";
+ Result += MethodInternalNames[*MethodBegin];
+ Result += "}\n";
+ }
+ Result += "\t }\n};\n";
+}
+
+Stmt *RewriteModernObjC::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) {
+ SourceRange OldRange = IV->getSourceRange();
+ Expr *BaseExpr = IV->getBase();
+
+ // Rewrite the base, but without actually doing replaces.
+ {
+ DisableReplaceStmtScope S(*this);
+ BaseExpr = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(BaseExpr));
+ IV->setBase(BaseExpr);
+ }
+
+ ObjCIvarDecl *D = IV->getDecl();
+
+ Expr *Replacement = IV;
+
+ if (BaseExpr->getType()->isObjCObjectPointerType()) {
+ const ObjCInterfaceType *iFaceDecl =
+ dyn_cast<ObjCInterfaceType>(BaseExpr->getType()->getPointeeType());
+ assert(iFaceDecl && "RewriteObjCIvarRefExpr - iFaceDecl is null");
+ // lookup which class implements the instance variable.
+ ObjCInterfaceDecl *clsDeclared = 0;
+ iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
+ clsDeclared);
+ assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
+
+ // Build name of symbol holding ivar offset.
+ std::string IvarOffsetName;
+ WriteInternalIvarName(clsDeclared, D, IvarOffsetName);
+
+ ReferencedIvars[clsDeclared].insert(D);
+
+ // cast offset to "char *".
+ CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(Context->CharTy),
+ CK_BitCast,
+ BaseExpr);
+ VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
+ SourceLocation(), &Context->Idents.get(IvarOffsetName),
+ Context->UnsignedLongTy, 0, SC_Extern, SC_None);
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(NewVD, false,
+ Context->UnsignedLongTy, VK_LValue,
+ SourceLocation());
+ BinaryOperator *addExpr =
+ new (Context) BinaryOperator(castExpr, DRE, BO_Add,
+ Context->getPointerType(Context->CharTy),
+ VK_RValue, OK_Ordinary, SourceLocation());
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(SourceLocation(),
+ SourceLocation(),
+ addExpr);
+ QualType IvarT = D->getType();
+ convertObjCTypeToCStyleType(IvarT);
+ QualType castT = Context->getPointerType(IvarT);
+
+ castExpr = NoTypeInfoCStyleCastExpr(Context,
+ castT,
+ CK_BitCast,
+ PE);
+ Expr *Exp = new (Context) UnaryOperator(castExpr, UO_Deref, IvarT,
+ VK_LValue, OK_Ordinary,
+ SourceLocation());
+ PE = new (Context) ParenExpr(OldRange.getBegin(),
+ OldRange.getEnd(),
+ Exp);
+
+ Replacement = PE;
+ }
+
+ ReplaceStmtWithRange(IV, Replacement, OldRange);
+ return Replacement;
+}
diff --git a/clang/lib/Rewrite/RewriteObjC.cpp b/clang/lib/Rewrite/RewriteObjC.cpp
new file mode 100644
index 0000000..9c0737f
--- /dev/null
+++ b/clang/lib/Rewrite/RewriteObjC.cpp
@@ -0,0 +1,6018 @@
+//===--- RewriteObjC.cpp - Playground for the code rewriter ---------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Hacks and fun related to the code rewriter.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/ASTConsumers.h"
+#include "clang/Rewrite/Rewriter.h"
+#include "clang/AST/AST.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/AST/ParentMap.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/IdentifierTable.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Lex/Lexer.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/DenseSet.h"
+
+using namespace clang;
+using llvm::utostr;
+
+namespace {
+ class RewriteObjC : public ASTConsumer {
+ protected:
+
+ enum {
+ BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)),
+ block, ... */
+ BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */
+ BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the
+ __block variable */
+ BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy
+ helpers */
+ BLOCK_BYREF_CALLER = 128, /* called from __block (byref) copy/dispose
+ support routines */
+ BLOCK_BYREF_CURRENT_MAX = 256
+ };
+
+ enum {
+ BLOCK_NEEDS_FREE = (1 << 24),
+ BLOCK_HAS_COPY_DISPOSE = (1 << 25),
+ BLOCK_HAS_CXX_OBJ = (1 << 26),
+ BLOCK_IS_GC = (1 << 27),
+ BLOCK_IS_GLOBAL = (1 << 28),
+ BLOCK_HAS_DESCRIPTOR = (1 << 29)
+ };
+ static const int OBJC_ABI_VERSION = 7;
+
+ Rewriter Rewrite;
+ DiagnosticsEngine &Diags;
+ const LangOptions &LangOpts;
+ ASTContext *Context;
+ SourceManager *SM;
+ TranslationUnitDecl *TUDecl;
+ FileID MainFileID;
+ const char *MainFileStart, *MainFileEnd;
+ Stmt *CurrentBody;
+ ParentMap *PropParentMap; // created lazily.
+ std::string InFileName;
+ raw_ostream* OutFile;
+ std::string Preamble;
+
+ TypeDecl *ProtocolTypeDecl;
+ VarDecl *GlobalVarDecl;
+ unsigned RewriteFailedDiag;
+ // ObjC string constant support.
+ unsigned NumObjCStringLiterals;
+ VarDecl *ConstantStringClassReference;
+ RecordDecl *NSStringRecord;
+
+ // ObjC foreach break/continue generation support.
+ int BcLabelCount;
+
+ unsigned TryFinallyContainsReturnDiag;
+ // Needed for super.
+ ObjCMethodDecl *CurMethodDef;
+ RecordDecl *SuperStructDecl;
+ RecordDecl *ConstantStringDecl;
+
+ FunctionDecl *MsgSendFunctionDecl;
+ FunctionDecl *MsgSendSuperFunctionDecl;
+ FunctionDecl *MsgSendStretFunctionDecl;
+ FunctionDecl *MsgSendSuperStretFunctionDecl;
+ FunctionDecl *MsgSendFpretFunctionDecl;
+ FunctionDecl *GetClassFunctionDecl;
+ FunctionDecl *GetMetaClassFunctionDecl;
+ FunctionDecl *GetSuperClassFunctionDecl;
+ FunctionDecl *SelGetUidFunctionDecl;
+ FunctionDecl *CFStringFunctionDecl;
+ FunctionDecl *SuperContructorFunctionDecl;
+ FunctionDecl *CurFunctionDef;
+ FunctionDecl *CurFunctionDeclToDeclareForBlock;
+
+ /* Misc. containers needed for meta-data rewrite. */
+ SmallVector<ObjCImplementationDecl *, 8> ClassImplementation;
+ SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation;
+ llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs;
+ llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols;
+ llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCForwardDecls;
+ llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
+ SmallVector<Stmt *, 32> Stmts;
+ SmallVector<int, 8> ObjCBcLabelNo;
+ // Remember all the @protocol(<expr>) expressions.
+ llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
+
+ llvm::DenseSet<uint64_t> CopyDestroyCache;
+
+ // Block expressions.
+ SmallVector<BlockExpr *, 32> Blocks;
+ SmallVector<int, 32> InnerDeclRefsCount;
+ SmallVector<DeclRefExpr *, 32> InnerDeclRefs;
+
+ SmallVector<DeclRefExpr *, 32> BlockDeclRefs;
+
+ // Block related declarations.
+ SmallVector<ValueDecl *, 8> BlockByCopyDecls;
+ llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
+ SmallVector<ValueDecl *, 8> BlockByRefDecls;
+ llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
+ llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
+ llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
+ llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
+
+ llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
+
+ // This maps an original source AST to it's rewritten form. This allows
+ // us to avoid rewriting the same node twice (which is very uncommon).
+ // This is needed to support some of the exotic property rewriting.
+ llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
+
+ // Needed for header files being rewritten
+ bool IsHeader;
+ bool SilenceRewriteMacroWarning;
+ bool objc_impl_method;
+
+ bool DisableReplaceStmt;
+ class DisableReplaceStmtScope {
+ RewriteObjC &R;
+ bool SavedValue;
+
+ public:
+ DisableReplaceStmtScope(RewriteObjC &R)
+ : R(R), SavedValue(R.DisableReplaceStmt) {
+ R.DisableReplaceStmt = true;
+ }
+ ~DisableReplaceStmtScope() {
+ R.DisableReplaceStmt = SavedValue;
+ }
+ };
+ void InitializeCommon(ASTContext &context);
+
+ public:
+
+ // Top Level Driver code.
+ virtual bool HandleTopLevelDecl(DeclGroupRef D) {
+ for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
+ if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(*I)) {
+ if (!Class->isThisDeclarationADefinition()) {
+ RewriteForwardClassDecl(D);
+ break;
+ }
+ }
+
+ if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(*I)) {
+ if (!Proto->isThisDeclarationADefinition()) {
+ RewriteForwardProtocolDecl(D);
+ break;
+ }
+ }
+
+ HandleTopLevelSingleDecl(*I);
+ }
+ return true;
+ }
+ void HandleTopLevelSingleDecl(Decl *D);
+ void HandleDeclInMainFile(Decl *D);
+ RewriteObjC(std::string inFile, raw_ostream *OS,
+ DiagnosticsEngine &D, const LangOptions &LOpts,
+ bool silenceMacroWarn);
+
+ ~RewriteObjC() {}
+
+ virtual void HandleTranslationUnit(ASTContext &C);
+
+ void ReplaceStmt(Stmt *Old, Stmt *New) {
+ Stmt *ReplacingStmt = ReplacedNodes[Old];
+
+ if (ReplacingStmt)
+ return; // We can't rewrite the same node twice.
+
+ if (DisableReplaceStmt)
+ return;
+
+ // If replacement succeeded or warning disabled return with no warning.
+ if (!Rewrite.ReplaceStmt(Old, New)) {
+ ReplacedNodes[Old] = New;
+ return;
+ }
+ if (SilenceRewriteMacroWarning)
+ return;
+ Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
+ << Old->getSourceRange();
+ }
+
+ void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
+ if (DisableReplaceStmt)
+ return;
+
+ // Measure the old text.
+ int Size = Rewrite.getRangeSize(SrcRange);
+ if (Size == -1) {
+ Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
+ << Old->getSourceRange();
+ return;
+ }
+ // Get the new text.
+ std::string SStr;
+ llvm::raw_string_ostream S(SStr);
+ New->printPretty(S, *Context, 0, PrintingPolicy(LangOpts));
+ const std::string &Str = S.str();
+
+ // If replacement succeeded or warning disabled return with no warning.
+ if (!Rewrite.ReplaceText(SrcRange.getBegin(), Size, Str)) {
+ ReplacedNodes[Old] = New;
+ return;
+ }
+ if (SilenceRewriteMacroWarning)
+ return;
+ Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
+ << Old->getSourceRange();
+ }
+
+ void InsertText(SourceLocation Loc, StringRef Str,
+ bool InsertAfter = true) {
+ // If insertion succeeded or warning disabled return with no warning.
+ if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
+ SilenceRewriteMacroWarning)
+ return;
+
+ Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag);
+ }
+
+ void ReplaceText(SourceLocation Start, unsigned OrigLength,
+ StringRef Str) {
+ // If removal succeeded or warning disabled return with no warning.
+ if (!Rewrite.ReplaceText(Start, OrigLength, Str) ||
+ SilenceRewriteMacroWarning)
+ return;
+
+ Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag);
+ }
+
+ // Syntactic Rewriting.
+ void RewriteRecordBody(RecordDecl *RD);
+ void RewriteInclude();
+ void RewriteForwardClassDecl(DeclGroupRef D);
+ void RewriteForwardClassDecl(const llvm::SmallVector<Decl*, 8> &DG);
+ void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
+ const std::string &typedefString);
+ void RewriteImplementations();
+ void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
+ ObjCImplementationDecl *IMD,
+ ObjCCategoryImplDecl *CID);
+ void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
+ void RewriteImplementationDecl(Decl *Dcl);
+ void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
+ ObjCMethodDecl *MDecl, std::string &ResultStr);
+ void RewriteTypeIntoString(QualType T, std::string &ResultStr,
+ const FunctionType *&FPRetType);
+ void RewriteByRefString(std::string &ResultStr, const std::string &Name,
+ ValueDecl *VD, bool def=false);
+ void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
+ void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
+ void RewriteForwardProtocolDecl(DeclGroupRef D);
+ void RewriteForwardProtocolDecl(const llvm::SmallVector<Decl*, 8> &DG);
+ void RewriteMethodDeclaration(ObjCMethodDecl *Method);
+ void RewriteProperty(ObjCPropertyDecl *prop);
+ void RewriteFunctionDecl(FunctionDecl *FD);
+ void RewriteBlockPointerType(std::string& Str, QualType Type);
+ void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
+ void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
+ void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
+ void RewriteTypeOfDecl(VarDecl *VD);
+ void RewriteObjCQualifiedInterfaceTypes(Expr *E);
+
+ // Expression Rewriting.
+ Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
+ Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
+ Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
+ Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
+ Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
+ Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
+ Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
+ Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
+ void RewriteTryReturnStmts(Stmt *S);
+ void RewriteSyncReturnStmts(Stmt *S, std::string buf);
+ Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
+ Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
+ Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
+ Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
+ SourceLocation OrigEnd);
+ Stmt *RewriteBreakStmt(BreakStmt *S);
+ Stmt *RewriteContinueStmt(ContinueStmt *S);
+ void RewriteCastExpr(CStyleCastExpr *CE);
+
+ // Block rewriting.
+ void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
+
+ // Block specific rewrite rules.
+ void RewriteBlockPointerDecl(NamedDecl *VD);
+ void RewriteByRefVar(VarDecl *VD);
+ Stmt *RewriteBlockDeclRefExpr(DeclRefExpr *VD);
+ Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
+ void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
+
+ void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
+ std::string &Result);
+
+ virtual void Initialize(ASTContext &context) = 0;
+
+ // Metadata Rewriting.
+ virtual void RewriteMetaDataIntoBuffer(std::string &Result) = 0;
+ virtual void RewriteObjCProtocolListMetaData(const ObjCList<ObjCProtocolDecl> &Prots,
+ StringRef prefix,
+ StringRef ClassName,
+ std::string &Result) = 0;
+ virtual void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
+ std::string &Result) = 0;
+ virtual void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
+ StringRef prefix,
+ StringRef ClassName,
+ std::string &Result) = 0;
+ virtual void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
+ std::string &Result) = 0;
+
+ // Rewriting ivar access
+ virtual Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) = 0;
+ virtual void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
+ std::string &Result) = 0;
+
+ // Misc. AST transformation routines. Somtimes they end up calling
+ // rewriting routines on the new ASTs.
+ CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
+ Expr **args, unsigned nargs,
+ SourceLocation StartLoc=SourceLocation(),
+ SourceLocation EndLoc=SourceLocation());
+
+ Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
+ SourceLocation StartLoc=SourceLocation(),
+ SourceLocation EndLoc=SourceLocation());
+
+ void SynthCountByEnumWithState(std::string &buf);
+ void SynthMsgSendFunctionDecl();
+ void SynthMsgSendSuperFunctionDecl();
+ void SynthMsgSendStretFunctionDecl();
+ void SynthMsgSendFpretFunctionDecl();
+ void SynthMsgSendSuperStretFunctionDecl();
+ void SynthGetClassFunctionDecl();
+ void SynthGetMetaClassFunctionDecl();
+ void SynthGetSuperClassFunctionDecl();
+ void SynthSelGetUidFunctionDecl();
+ void SynthSuperContructorFunctionDecl();
+
+ std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
+ std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
+ StringRef funcName, std::string Tag);
+ std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
+ StringRef funcName, std::string Tag);
+ std::string SynthesizeBlockImpl(BlockExpr *CE,
+ std::string Tag, std::string Desc);
+ std::string SynthesizeBlockDescriptor(std::string DescTag,
+ std::string ImplTag,
+ int i, StringRef funcName,
+ unsigned hasCopy);
+ Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
+ void SynthesizeBlockLiterals(SourceLocation FunLocStart,
+ StringRef FunName);
+ FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
+ Stmt *SynthBlockInitExpr(BlockExpr *Exp,
+ const SmallVector<DeclRefExpr *, 8> &InnerBlockDeclRefs);
+
+ // Misc. helper routines.
+ QualType getProtocolType();
+ void WarnAboutReturnGotoStmts(Stmt *S);
+ void HasReturnStmts(Stmt *S, bool &hasReturns);
+ void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
+ void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
+ void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
+
+ bool IsDeclStmtInForeachHeader(DeclStmt *DS);
+ void CollectBlockDeclRefInfo(BlockExpr *Exp);
+ void GetBlockDeclRefExprs(Stmt *S);
+ void GetInnerBlockDeclRefExprs(Stmt *S,
+ SmallVector<DeclRefExpr *, 8> &InnerBlockDeclRefs,
+ llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts);
+
+ // We avoid calling Type::isBlockPointerType(), since it operates on the
+ // canonical type. We only care if the top-level type is a closure pointer.
+ bool isTopLevelBlockPointerType(QualType T) {
+ return isa<BlockPointerType>(T);
+ }
+
+ /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
+ /// to a function pointer type and upon success, returns true; false
+ /// otherwise.
+ bool convertBlockPointerToFunctionPointer(QualType &T) {
+ if (isTopLevelBlockPointerType(T)) {
+ const BlockPointerType *BPT = T->getAs<BlockPointerType>();
+ T = Context->getPointerType(BPT->getPointeeType());
+ return true;
+ }
+ return false;
+ }
+
+ bool needToScanForQualifiers(QualType T);
+ QualType getSuperStructType();
+ QualType getConstantStringStructType();
+ QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
+ bool BufferContainsPPDirectives(const char *startBuf, const char *endBuf);
+
+ void convertToUnqualifiedObjCType(QualType &T) {
+ if (T->isObjCQualifiedIdType())
+ T = Context->getObjCIdType();
+ else if (T->isObjCQualifiedClassType())
+ T = Context->getObjCClassType();
+ else if (T->isObjCObjectPointerType() &&
+ T->getPointeeType()->isObjCQualifiedInterfaceType()) {
+ if (const ObjCObjectPointerType * OBJPT =
+ T->getAsObjCInterfacePointerType()) {
+ const ObjCInterfaceType *IFaceT = OBJPT->getInterfaceType();
+ T = QualType(IFaceT, 0);
+ T = Context->getPointerType(T);
+ }
+ }
+ }
+
+ // FIXME: This predicate seems like it would be useful to add to ASTContext.
+ bool isObjCType(QualType T) {
+ if (!LangOpts.ObjC1 && !LangOpts.ObjC2)
+ return false;
+
+ QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
+
+ if (OCT == Context->getCanonicalType(Context->getObjCIdType()) ||
+ OCT == Context->getCanonicalType(Context->getObjCClassType()))
+ return true;
+
+ if (const PointerType *PT = OCT->getAs<PointerType>()) {
+ if (isa<ObjCInterfaceType>(PT->getPointeeType()) ||
+ PT->getPointeeType()->isObjCQualifiedIdType())
+ return true;
+ }
+ return false;
+ }
+ bool PointerTypeTakesAnyBlockArguments(QualType QT);
+ bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
+ void GetExtentOfArgList(const char *Name, const char *&LParen,
+ const char *&RParen);
+
+ void QuoteDoublequotes(std::string &From, std::string &To) {
+ for (unsigned i = 0; i < From.length(); i++) {
+ if (From[i] == '"')
+ To += "\\\"";
+ else
+ To += From[i];
+ }
+ }
+
+ QualType getSimpleFunctionType(QualType result,
+ const QualType *args,
+ unsigned numArgs,
+ bool variadic = false) {
+ if (result == Context->getObjCInstanceType())
+ result = Context->getObjCIdType();
+ FunctionProtoType::ExtProtoInfo fpi;
+ fpi.Variadic = variadic;
+ return Context->getFunctionType(result, args, numArgs, fpi);
+ }
+
+ // Helper function: create a CStyleCastExpr with trivial type source info.
+ CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
+ CastKind Kind, Expr *E) {
+ TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(Ty, SourceLocation());
+ return CStyleCastExpr::Create(*Ctx, Ty, VK_RValue, Kind, E, 0, TInfo,
+ SourceLocation(), SourceLocation());
+ }
+ };
+
+ class RewriteObjCFragileABI : public RewriteObjC {
+ public:
+
+ RewriteObjCFragileABI(std::string inFile, raw_ostream *OS,
+ DiagnosticsEngine &D, const LangOptions &LOpts,
+ bool silenceMacroWarn) : RewriteObjC(inFile, OS,
+ D, LOpts,
+ silenceMacroWarn) {}
+
+ ~RewriteObjCFragileABI() {}
+ virtual void Initialize(ASTContext &context);
+
+ // Rewriting metadata
+ template<typename MethodIterator>
+ void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
+ MethodIterator MethodEnd,
+ bool IsInstanceMethod,
+ StringRef prefix,
+ StringRef ClassName,
+ std::string &Result);
+ virtual void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
+ StringRef prefix,
+ StringRef ClassName,
+ std::string &Result);
+ virtual void RewriteObjCProtocolListMetaData(
+ const ObjCList<ObjCProtocolDecl> &Prots,
+ StringRef prefix, StringRef ClassName, std::string &Result);
+ virtual void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
+ std::string &Result);
+ virtual void RewriteMetaDataIntoBuffer(std::string &Result);
+ virtual void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
+ std::string &Result);
+
+ // Rewriting ivar
+ virtual void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
+ std::string &Result);
+ virtual Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV);
+ };
+}
+
+void RewriteObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
+ NamedDecl *D) {
+ if (const FunctionProtoType *fproto
+ = dyn_cast<FunctionProtoType>(funcType.IgnoreParens())) {
+ for (FunctionProtoType::arg_type_iterator I = fproto->arg_type_begin(),
+ E = fproto->arg_type_end(); I && (I != E); ++I)
+ if (isTopLevelBlockPointerType(*I)) {
+ // All the args are checked/rewritten. Don't call twice!
+ RewriteBlockPointerDecl(D);
+ break;
+ }
+ }
+}
+
+void RewriteObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
+ const PointerType *PT = funcType->getAs<PointerType>();
+ if (PT && PointerTypeTakesAnyBlockArguments(funcType))
+ RewriteBlocksInFunctionProtoType(PT->getPointeeType(), ND);
+}
+
+static bool IsHeaderFile(const std::string &Filename) {
+ std::string::size_type DotPos = Filename.rfind('.');
+
+ if (DotPos == std::string::npos) {
+ // no file extension
+ return false;
+ }
+
+ std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
+ // C header: .h
+ // C++ header: .hh or .H;
+ return Ext == "h" || Ext == "hh" || Ext == "H";
+}
+
+RewriteObjC::RewriteObjC(std::string inFile, raw_ostream* OS,
+ DiagnosticsEngine &D, const LangOptions &LOpts,
+ bool silenceMacroWarn)
+ : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(OS),
+ SilenceRewriteMacroWarning(silenceMacroWarn) {
+ IsHeader = IsHeaderFile(inFile);
+ RewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
+ "rewriting sub-expression within a macro (may not be correct)");
+ TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
+ DiagnosticsEngine::Warning,
+ "rewriter doesn't support user-specified control flow semantics "
+ "for @try/@finally (code may not execute properly)");
+}
+
+ASTConsumer *clang::CreateObjCRewriter(const std::string& InFile,
+ raw_ostream* OS,
+ DiagnosticsEngine &Diags,
+ const LangOptions &LOpts,
+ bool SilenceRewriteMacroWarning) {
+ return new RewriteObjCFragileABI(InFile, OS, Diags, LOpts, SilenceRewriteMacroWarning);
+}
+
+void RewriteObjC::InitializeCommon(ASTContext &context) {
+ Context = &context;
+ SM = &Context->getSourceManager();
+ TUDecl = Context->getTranslationUnitDecl();
+ MsgSendFunctionDecl = 0;
+ MsgSendSuperFunctionDecl = 0;
+ MsgSendStretFunctionDecl = 0;
+ MsgSendSuperStretFunctionDecl = 0;
+ MsgSendFpretFunctionDecl = 0;
+ GetClassFunctionDecl = 0;
+ GetMetaClassFunctionDecl = 0;
+ GetSuperClassFunctionDecl = 0;
+ SelGetUidFunctionDecl = 0;
+ CFStringFunctionDecl = 0;
+ ConstantStringClassReference = 0;
+ NSStringRecord = 0;
+ CurMethodDef = 0;
+ CurFunctionDef = 0;
+ CurFunctionDeclToDeclareForBlock = 0;
+ GlobalVarDecl = 0;
+ SuperStructDecl = 0;
+ ProtocolTypeDecl = 0;
+ ConstantStringDecl = 0;
+ BcLabelCount = 0;
+ SuperContructorFunctionDecl = 0;
+ NumObjCStringLiterals = 0;
+ PropParentMap = 0;
+ CurrentBody = 0;
+ DisableReplaceStmt = false;
+ objc_impl_method = false;
+
+ // Get the ID and start/end of the main file.
+ MainFileID = SM->getMainFileID();
+ const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID);
+ MainFileStart = MainBuf->getBufferStart();
+ MainFileEnd = MainBuf->getBufferEnd();
+
+ Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOpts());
+}
+
+//===----------------------------------------------------------------------===//
+// Top Level Driver Code
+//===----------------------------------------------------------------------===//
+
+void RewriteObjC::HandleTopLevelSingleDecl(Decl *D) {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ // Two cases: either the decl could be in the main file, or it could be in a
+ // #included file. If the former, rewrite it now. If the later, check to see
+ // if we rewrote the #include/#import.
+ SourceLocation Loc = D->getLocation();
+ Loc = SM->getExpansionLoc(Loc);
+
+ // If this is for a builtin, ignore it.
+ if (Loc.isInvalid()) return;
+
+ // Look for built-in declarations that we need to refer during the rewrite.
+ if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
+ RewriteFunctionDecl(FD);
+ } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) {
+ // declared in <Foundation/NSString.h>
+ if (FVD->getName() == "_NSConstantStringClassReference") {
+ ConstantStringClassReference = FVD;
+ return;
+ }
+ } else if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
+ if (ID->isThisDeclarationADefinition())
+ RewriteInterfaceDecl(ID);
+ } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) {
+ RewriteCategoryDecl(CD);
+ } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) {
+ if (PD->isThisDeclarationADefinition())
+ RewriteProtocolDecl(PD);
+ } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
+ // Recurse into linkage specifications
+ for (DeclContext::decl_iterator DI = LSD->decls_begin(),
+ DIEnd = LSD->decls_end();
+ DI != DIEnd; ) {
+ if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>((*DI))) {
+ if (!IFace->isThisDeclarationADefinition()) {
+ SmallVector<Decl *, 8> DG;
+ SourceLocation StartLoc = IFace->getLocStart();
+ do {
+ if (isa<ObjCInterfaceDecl>(*DI) &&
+ !cast<ObjCInterfaceDecl>(*DI)->isThisDeclarationADefinition() &&
+ StartLoc == (*DI)->getLocStart())
+ DG.push_back(*DI);
+ else
+ break;
+
+ ++DI;
+ } while (DI != DIEnd);
+ RewriteForwardClassDecl(DG);
+ continue;
+ }
+ }
+
+ if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>((*DI))) {
+ if (!Proto->isThisDeclarationADefinition()) {
+ SmallVector<Decl *, 8> DG;
+ SourceLocation StartLoc = Proto->getLocStart();
+ do {
+ if (isa<ObjCProtocolDecl>(*DI) &&
+ !cast<ObjCProtocolDecl>(*DI)->isThisDeclarationADefinition() &&
+ StartLoc == (*DI)->getLocStart())
+ DG.push_back(*DI);
+ else
+ break;
+
+ ++DI;
+ } while (DI != DIEnd);
+ RewriteForwardProtocolDecl(DG);
+ continue;
+ }
+ }
+
+ HandleTopLevelSingleDecl(*DI);
+ ++DI;
+ }
+ }
+ // If we have a decl in the main file, see if we should rewrite it.
+ if (SM->isFromMainFile(Loc))
+ return HandleDeclInMainFile(D);
+}
+
+//===----------------------------------------------------------------------===//
+// Syntactic (non-AST) Rewriting Code
+//===----------------------------------------------------------------------===//
+
+void RewriteObjC::RewriteInclude() {
+ SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
+ StringRef MainBuf = SM->getBufferData(MainFileID);
+ const char *MainBufStart = MainBuf.begin();
+ const char *MainBufEnd = MainBuf.end();
+ size_t ImportLen = strlen("import");
+
+ // Loop over the whole file, looking for includes.
+ for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) {
+ if (*BufPtr == '#') {
+ if (++BufPtr == MainBufEnd)
+ return;
+ while (*BufPtr == ' ' || *BufPtr == '\t')
+ if (++BufPtr == MainBufEnd)
+ return;
+ if (!strncmp(BufPtr, "import", ImportLen)) {
+ // replace import with include
+ SourceLocation ImportLoc =
+ LocStart.getLocWithOffset(BufPtr-MainBufStart);
+ ReplaceText(ImportLoc, ImportLen, "include");
+ BufPtr += ImportLen;
+ }
+ }
+ }
+}
+
+static std::string getIvarAccessString(ObjCIvarDecl *OID) {
+ const ObjCInterfaceDecl *ClassDecl = OID->getContainingInterface();
+ std::string S;
+ S = "((struct ";
+ S += ClassDecl->getIdentifier()->getName();
+ S += "_IMPL *)self)->";
+ S += OID->getName();
+ return S;
+}
+
+void RewriteObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
+ ObjCImplementationDecl *IMD,
+ ObjCCategoryImplDecl *CID) {
+ static bool objcGetPropertyDefined = false;
+ static bool objcSetPropertyDefined = false;
+ SourceLocation startLoc = PID->getLocStart();
+ InsertText(startLoc, "// ");
+ const char *startBuf = SM->getCharacterData(startLoc);
+ assert((*startBuf == '@') && "bogus @synthesize location");
+ const char *semiBuf = strchr(startBuf, ';');
+ assert((*semiBuf == ';') && "@synthesize: can't find ';'");
+ SourceLocation onePastSemiLoc =
+ startLoc.getLocWithOffset(semiBuf-startBuf+1);
+
+ if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
+ return; // FIXME: is this correct?
+
+ // Generate the 'getter' function.
+ ObjCPropertyDecl *PD = PID->getPropertyDecl();
+ ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
+
+ if (!OID)
+ return;
+ unsigned Attributes = PD->getPropertyAttributes();
+ if (!PD->getGetterMethodDecl()->isDefined()) {
+ bool GenGetProperty = !(Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) &&
+ (Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
+ ObjCPropertyDecl::OBJC_PR_copy));
+ std::string Getr;
+ if (GenGetProperty && !objcGetPropertyDefined) {
+ objcGetPropertyDefined = true;
+ // FIXME. Is this attribute correct in all cases?
+ Getr = "\nextern \"C\" __declspec(dllimport) "
+ "id objc_getProperty(id, SEL, long, bool);\n";
+ }
+ RewriteObjCMethodDecl(OID->getContainingInterface(),
+ PD->getGetterMethodDecl(), Getr);
+ Getr += "{ ";
+ // Synthesize an explicit cast to gain access to the ivar.
+ // See objc-act.c:objc_synthesize_new_getter() for details.
+ if (GenGetProperty) {
+ // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
+ Getr += "typedef ";
+ const FunctionType *FPRetType = 0;
+ RewriteTypeIntoString(PD->getGetterMethodDecl()->getResultType(), Getr,
+ FPRetType);
+ Getr += " _TYPE";
+ if (FPRetType) {
+ Getr += ")"; // close the precedence "scope" for "*".
+
+ // Now, emit the argument types (if any).
+ if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)){
+ Getr += "(";
+ for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) {
+ if (i) Getr += ", ";
+ std::string ParamStr = FT->getArgType(i).getAsString(
+ Context->getPrintingPolicy());
+ Getr += ParamStr;
+ }
+ if (FT->isVariadic()) {
+ if (FT->getNumArgs()) Getr += ", ";
+ Getr += "...";
+ }
+ Getr += ")";
+ } else
+ Getr += "()";
+ }
+ Getr += ";\n";
+ Getr += "return (_TYPE)";
+ Getr += "objc_getProperty(self, _cmd, ";
+ RewriteIvarOffsetComputation(OID, Getr);
+ Getr += ", 1)";
+ }
+ else
+ Getr += "return " + getIvarAccessString(OID);
+ Getr += "; }";
+ InsertText(onePastSemiLoc, Getr);
+ }
+
+ if (PD->isReadOnly() || PD->getSetterMethodDecl()->isDefined())
+ return;
+
+ // Generate the 'setter' function.
+ std::string Setr;
+ bool GenSetProperty = Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
+ ObjCPropertyDecl::OBJC_PR_copy);
+ if (GenSetProperty && !objcSetPropertyDefined) {
+ objcSetPropertyDefined = true;
+ // FIXME. Is this attribute correct in all cases?
+ Setr = "\nextern \"C\" __declspec(dllimport) "
+ "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
+ }
+
+ RewriteObjCMethodDecl(OID->getContainingInterface(),
+ PD->getSetterMethodDecl(), Setr);
+ Setr += "{ ";
+ // Synthesize an explicit cast to initialize the ivar.
+ // See objc-act.c:objc_synthesize_new_setter() for details.
+ if (GenSetProperty) {
+ Setr += "objc_setProperty (self, _cmd, ";
+ RewriteIvarOffsetComputation(OID, Setr);
+ Setr += ", (id)";
+ Setr += PD->getName();
+ Setr += ", ";
+ if (Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic)
+ Setr += "0, ";
+ else
+ Setr += "1, ";
+ if (Attributes & ObjCPropertyDecl::OBJC_PR_copy)
+ Setr += "1)";
+ else
+ Setr += "0)";
+ }
+ else {
+ Setr += getIvarAccessString(OID) + " = ";
+ Setr += PD->getName();
+ }
+ Setr += "; }";
+ InsertText(onePastSemiLoc, Setr);
+}
+
+static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
+ std::string &typedefString) {
+ typedefString += "#ifndef _REWRITER_typedef_";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += "\n";
+ typedefString += "#define _REWRITER_typedef_";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += "\n";
+ typedefString += "typedef struct objc_object ";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += ";\n#endif\n";
+}
+
+void RewriteObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
+ const std::string &typedefString) {
+ SourceLocation startLoc = ClassDecl->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+ const char *semiPtr = strchr(startBuf, ';');
+ // Replace the @class with typedefs corresponding to the classes.
+ ReplaceText(startLoc, semiPtr-startBuf+1, typedefString);
+}
+
+void RewriteObjC::RewriteForwardClassDecl(DeclGroupRef D) {
+ std::string typedefString;
+ for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
+ ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(*I);
+ if (I == D.begin()) {
+ // Translate to typedef's that forward reference structs with the same name
+ // as the class. As a convenience, we include the original declaration
+ // as a comment.
+ typedefString += "// @class ";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += ";\n";
+ }
+ RewriteOneForwardClassDecl(ForwardDecl, typedefString);
+ }
+ DeclGroupRef::iterator I = D.begin();
+ RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(*I), typedefString);
+}
+
+void RewriteObjC::RewriteForwardClassDecl(
+ const llvm::SmallVector<Decl*, 8> &D) {
+ std::string typedefString;
+ for (unsigned i = 0; i < D.size(); i++) {
+ ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(D[i]);
+ if (i == 0) {
+ typedefString += "// @class ";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += ";\n";
+ }
+ RewriteOneForwardClassDecl(ForwardDecl, typedefString);
+ }
+ RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(D[0]), typedefString);
+}
+
+void RewriteObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
+ // When method is a synthesized one, such as a getter/setter there is
+ // nothing to rewrite.
+ if (Method->isImplicit())
+ return;
+ SourceLocation LocStart = Method->getLocStart();
+ SourceLocation LocEnd = Method->getLocEnd();
+
+ if (SM->getExpansionLineNumber(LocEnd) >
+ SM->getExpansionLineNumber(LocStart)) {
+ InsertText(LocStart, "#if 0\n");
+ ReplaceText(LocEnd, 1, ";\n#endif\n");
+ } else {
+ InsertText(LocStart, "// ");
+ }
+}
+
+void RewriteObjC::RewriteProperty(ObjCPropertyDecl *prop) {
+ SourceLocation Loc = prop->getAtLoc();
+
+ ReplaceText(Loc, 0, "// ");
+ // FIXME: handle properties that are declared across multiple lines.
+}
+
+void RewriteObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
+ SourceLocation LocStart = CatDecl->getLocStart();
+
+ // FIXME: handle category headers that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+
+ for (ObjCCategoryDecl::prop_iterator I = CatDecl->prop_begin(),
+ E = CatDecl->prop_end(); I != E; ++I)
+ RewriteProperty(*I);
+
+ for (ObjCCategoryDecl::instmeth_iterator
+ I = CatDecl->instmeth_begin(), E = CatDecl->instmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+ for (ObjCCategoryDecl::classmeth_iterator
+ I = CatDecl->classmeth_begin(), E = CatDecl->classmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+
+ // Lastly, comment out the @end.
+ ReplaceText(CatDecl->getAtEndRange().getBegin(),
+ strlen("@end"), "/* @end */");
+}
+
+void RewriteObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
+ SourceLocation LocStart = PDecl->getLocStart();
+ assert(PDecl->isThisDeclarationADefinition());
+
+ // FIXME: handle protocol headers that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+
+ for (ObjCProtocolDecl::instmeth_iterator
+ I = PDecl->instmeth_begin(), E = PDecl->instmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+ for (ObjCProtocolDecl::classmeth_iterator
+ I = PDecl->classmeth_begin(), E = PDecl->classmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+
+ for (ObjCInterfaceDecl::prop_iterator I = PDecl->prop_begin(),
+ E = PDecl->prop_end(); I != E; ++I)
+ RewriteProperty(*I);
+
+ // Lastly, comment out the @end.
+ SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
+ ReplaceText(LocEnd, strlen("@end"), "/* @end */");
+
+ // Must comment out @optional/@required
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ for (const char *p = startBuf; p < endBuf; p++) {
+ if (*p == '@' && !strncmp(p+1, "optional", strlen("optional"))) {
+ SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
+ ReplaceText(OptionalLoc, strlen("@optional"), "/* @optional */");
+
+ }
+ else if (*p == '@' && !strncmp(p+1, "required", strlen("required"))) {
+ SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
+ ReplaceText(OptionalLoc, strlen("@required"), "/* @required */");
+
+ }
+ }
+}
+
+void RewriteObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
+ SourceLocation LocStart = (*D.begin())->getLocStart();
+ if (LocStart.isInvalid())
+ llvm_unreachable("Invalid SourceLocation");
+ // FIXME: handle forward protocol that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+}
+
+void
+RewriteObjC::RewriteForwardProtocolDecl(const llvm::SmallVector<Decl*, 8> &DG) {
+ SourceLocation LocStart = DG[0]->getLocStart();
+ if (LocStart.isInvalid())
+ llvm_unreachable("Invalid SourceLocation");
+ // FIXME: handle forward protocol that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+}
+
+void RewriteObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
+ const FunctionType *&FPRetType) {
+ if (T->isObjCQualifiedIdType())
+ ResultStr += "id";
+ else if (T->isFunctionPointerType() ||
+ T->isBlockPointerType()) {
+ // needs special handling, since pointer-to-functions have special
+ // syntax (where a decaration models use).
+ QualType retType = T;
+ QualType PointeeTy;
+ if (const PointerType* PT = retType->getAs<PointerType>())
+ PointeeTy = PT->getPointeeType();
+ else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
+ PointeeTy = BPT->getPointeeType();
+ if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
+ ResultStr += FPRetType->getResultType().getAsString(
+ Context->getPrintingPolicy());
+ ResultStr += "(*";
+ }
+ } else
+ ResultStr += T.getAsString(Context->getPrintingPolicy());
+}
+
+void RewriteObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
+ ObjCMethodDecl *OMD,
+ std::string &ResultStr) {
+ //fprintf(stderr,"In RewriteObjCMethodDecl\n");
+ const FunctionType *FPRetType = 0;
+ ResultStr += "\nstatic ";
+ RewriteTypeIntoString(OMD->getResultType(), ResultStr, FPRetType);
+ ResultStr += " ";
+
+ // Unique method name
+ std::string NameStr;
+
+ if (OMD->isInstanceMethod())
+ NameStr += "_I_";
+ else
+ NameStr += "_C_";
+
+ NameStr += IDecl->getNameAsString();
+ NameStr += "_";
+
+ if (ObjCCategoryImplDecl *CID =
+ dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
+ NameStr += CID->getNameAsString();
+ NameStr += "_";
+ }
+ // Append selector names, replacing ':' with '_'
+ {
+ std::string selString = OMD->getSelector().getAsString();
+ int len = selString.size();
+ for (int i = 0; i < len; i++)
+ if (selString[i] == ':')
+ selString[i] = '_';
+ NameStr += selString;
+ }
+ // Remember this name for metadata emission
+ MethodInternalNames[OMD] = NameStr;
+ ResultStr += NameStr;
+
+ // Rewrite arguments
+ ResultStr += "(";
+
+ // invisible arguments
+ if (OMD->isInstanceMethod()) {
+ QualType selfTy = Context->getObjCInterfaceType(IDecl);
+ selfTy = Context->getPointerType(selfTy);
+ if (!LangOpts.MicrosoftExt) {
+ if (ObjCSynthesizedStructs.count(const_cast<ObjCInterfaceDecl*>(IDecl)))
+ ResultStr += "struct ";
+ }
+ // When rewriting for Microsoft, explicitly omit the structure name.
+ ResultStr += IDecl->getNameAsString();
+ ResultStr += " *";
+ }
+ else
+ ResultStr += Context->getObjCClassType().getAsString(
+ Context->getPrintingPolicy());
+
+ ResultStr += " self, ";
+ ResultStr += Context->getObjCSelType().getAsString(Context->getPrintingPolicy());
+ ResultStr += " _cmd";
+
+ // Method arguments.
+ for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
+ E = OMD->param_end(); PI != E; ++PI) {
+ ParmVarDecl *PDecl = *PI;
+ ResultStr += ", ";
+ if (PDecl->getType()->isObjCQualifiedIdType()) {
+ ResultStr += "id ";
+ ResultStr += PDecl->getNameAsString();
+ } else {
+ std::string Name = PDecl->getNameAsString();
+ QualType QT = PDecl->getType();
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ (void)convertBlockPointerToFunctionPointer(QT);
+ QT.getAsStringInternal(Name, Context->getPrintingPolicy());
+ ResultStr += Name;
+ }
+ }
+ if (OMD->isVariadic())
+ ResultStr += ", ...";
+ ResultStr += ") ";
+
+ if (FPRetType) {
+ ResultStr += ")"; // close the precedence "scope" for "*".
+
+ // Now, emit the argument types (if any).
+ if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)) {
+ ResultStr += "(";
+ for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) {
+ if (i) ResultStr += ", ";
+ std::string ParamStr = FT->getArgType(i).getAsString(
+ Context->getPrintingPolicy());
+ ResultStr += ParamStr;
+ }
+ if (FT->isVariadic()) {
+ if (FT->getNumArgs()) ResultStr += ", ";
+ ResultStr += "...";
+ }
+ ResultStr += ")";
+ } else {
+ ResultStr += "()";
+ }
+ }
+}
+void RewriteObjC::RewriteImplementationDecl(Decl *OID) {
+ ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID);
+ ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID);
+
+ InsertText(IMD ? IMD->getLocStart() : CID->getLocStart(), "// ");
+
+ for (ObjCCategoryImplDecl::instmeth_iterator
+ I = IMD ? IMD->instmeth_begin() : CID->instmeth_begin(),
+ E = IMD ? IMD->instmeth_end() : CID->instmeth_end();
+ I != E; ++I) {
+ std::string ResultStr;
+ ObjCMethodDecl *OMD = *I;
+ RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
+ SourceLocation LocStart = OMD->getLocStart();
+ SourceLocation LocEnd = OMD->getCompoundBody()->getLocStart();
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ ReplaceText(LocStart, endBuf-startBuf, ResultStr);
+ }
+
+ for (ObjCCategoryImplDecl::classmeth_iterator
+ I = IMD ? IMD->classmeth_begin() : CID->classmeth_begin(),
+ E = IMD ? IMD->classmeth_end() : CID->classmeth_end();
+ I != E; ++I) {
+ std::string ResultStr;
+ ObjCMethodDecl *OMD = *I;
+ RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
+ SourceLocation LocStart = OMD->getLocStart();
+ SourceLocation LocEnd = OMD->getCompoundBody()->getLocStart();
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ ReplaceText(LocStart, endBuf-startBuf, ResultStr);
+ }
+ for (ObjCCategoryImplDecl::propimpl_iterator
+ I = IMD ? IMD->propimpl_begin() : CID->propimpl_begin(),
+ E = IMD ? IMD->propimpl_end() : CID->propimpl_end();
+ I != E; ++I) {
+ RewritePropertyImplDecl(*I, IMD, CID);
+ }
+
+ InsertText(IMD ? IMD->getLocEnd() : CID->getLocEnd(), "// ");
+}
+
+void RewriteObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
+ std::string ResultStr;
+ if (!ObjCForwardDecls.count(ClassDecl->getCanonicalDecl())) {
+ // we haven't seen a forward decl - generate a typedef.
+ ResultStr = "#ifndef _REWRITER_typedef_";
+ ResultStr += ClassDecl->getNameAsString();
+ ResultStr += "\n";
+ ResultStr += "#define _REWRITER_typedef_";
+ ResultStr += ClassDecl->getNameAsString();
+ ResultStr += "\n";
+ ResultStr += "typedef struct objc_object ";
+ ResultStr += ClassDecl->getNameAsString();
+ ResultStr += ";\n#endif\n";
+ // Mark this typedef as having been generated.
+ ObjCForwardDecls.insert(ClassDecl->getCanonicalDecl());
+ }
+ RewriteObjCInternalStruct(ClassDecl, ResultStr);
+
+ for (ObjCInterfaceDecl::prop_iterator I = ClassDecl->prop_begin(),
+ E = ClassDecl->prop_end(); I != E; ++I)
+ RewriteProperty(*I);
+ for (ObjCInterfaceDecl::instmeth_iterator
+ I = ClassDecl->instmeth_begin(), E = ClassDecl->instmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+ for (ObjCInterfaceDecl::classmeth_iterator
+ I = ClassDecl->classmeth_begin(), E = ClassDecl->classmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+
+ // Lastly, comment out the @end.
+ ReplaceText(ClassDecl->getAtEndRange().getBegin(), strlen("@end"),
+ "/* @end */");
+}
+
+Stmt *RewriteObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
+ SourceRange OldRange = PseudoOp->getSourceRange();
+
+ // We just magically know some things about the structure of this
+ // expression.
+ ObjCMessageExpr *OldMsg =
+ cast<ObjCMessageExpr>(PseudoOp->getSemanticExpr(
+ PseudoOp->getNumSemanticExprs() - 1));
+
+ // Because the rewriter doesn't allow us to rewrite rewritten code,
+ // we need to suppress rewriting the sub-statements.
+ Expr *Base, *RHS;
+ {
+ DisableReplaceStmtScope S(*this);
+
+ // Rebuild the base expression if we have one.
+ Base = 0;
+ if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
+ Base = OldMsg->getInstanceReceiver();
+ Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
+ Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
+ }
+
+ // Rebuild the RHS.
+ RHS = cast<BinaryOperator>(PseudoOp->getSyntacticForm())->getRHS();
+ RHS = cast<OpaqueValueExpr>(RHS)->getSourceExpr();
+ RHS = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(RHS));
+ }
+
+ // TODO: avoid this copy.
+ SmallVector<SourceLocation, 1> SelLocs;
+ OldMsg->getSelectorLocs(SelLocs);
+
+ ObjCMessageExpr *NewMsg = 0;
+ switch (OldMsg->getReceiverKind()) {
+ case ObjCMessageExpr::Class:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getClassReceiverTypeInfo(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ RHS,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::Instance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ Base,
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ RHS,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::SuperClass:
+ case ObjCMessageExpr::SuperInstance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getSuperLoc(),
+ OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
+ OldMsg->getSuperType(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ RHS,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+ }
+
+ Stmt *Replacement = SynthMessageExpr(NewMsg);
+ ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
+ return Replacement;
+}
+
+Stmt *RewriteObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
+ SourceRange OldRange = PseudoOp->getSourceRange();
+
+ // We just magically know some things about the structure of this
+ // expression.
+ ObjCMessageExpr *OldMsg =
+ cast<ObjCMessageExpr>(PseudoOp->getResultExpr()->IgnoreImplicit());
+
+ // Because the rewriter doesn't allow us to rewrite rewritten code,
+ // we need to suppress rewriting the sub-statements.
+ Expr *Base = 0;
+ {
+ DisableReplaceStmtScope S(*this);
+
+ // Rebuild the base expression if we have one.
+ if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
+ Base = OldMsg->getInstanceReceiver();
+ Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
+ Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
+ }
+ }
+
+ // Intentionally empty.
+ SmallVector<SourceLocation, 1> SelLocs;
+ SmallVector<Expr*, 1> Args;
+
+ ObjCMessageExpr *NewMsg = 0;
+ switch (OldMsg->getReceiverKind()) {
+ case ObjCMessageExpr::Class:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getClassReceiverTypeInfo(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::Instance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ Base,
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::SuperClass:
+ case ObjCMessageExpr::SuperInstance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getSuperLoc(),
+ OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
+ OldMsg->getSuperType(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+ }
+
+ Stmt *Replacement = SynthMessageExpr(NewMsg);
+ ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
+ return Replacement;
+}
+
+/// SynthCountByEnumWithState - To print:
+/// ((unsigned int (*)
+/// (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
+/// (void *)objc_msgSend)((id)l_collection,
+/// sel_registerName(
+/// "countByEnumeratingWithState:objects:count:"),
+/// &enumState,
+/// (id *)__rw_items, (unsigned int)16)
+///
+void RewriteObjC::SynthCountByEnumWithState(std::string &buf) {
+ buf += "((unsigned int (*) (id, SEL, struct __objcFastEnumerationState *, "
+ "id *, unsigned int))(void *)objc_msgSend)";
+ buf += "\n\t\t";
+ buf += "((id)l_collection,\n\t\t";
+ buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
+ buf += "\n\t\t";
+ buf += "&enumState, "
+ "(id *)__rw_items, (unsigned int)16)";
+}
+
+/// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
+/// statement to exit to its outer synthesized loop.
+///
+Stmt *RewriteObjC::RewriteBreakStmt(BreakStmt *S) {
+ if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
+ return S;
+ // replace break with goto __break_label
+ std::string buf;
+
+ SourceLocation startLoc = S->getLocStart();
+ buf = "goto __break_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ ReplaceText(startLoc, strlen("break"), buf);
+
+ return 0;
+}
+
+/// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
+/// statement to continue with its inner synthesized loop.
+///
+Stmt *RewriteObjC::RewriteContinueStmt(ContinueStmt *S) {
+ if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
+ return S;
+ // replace continue with goto __continue_label
+ std::string buf;
+
+ SourceLocation startLoc = S->getLocStart();
+ buf = "goto __continue_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ ReplaceText(startLoc, strlen("continue"), buf);
+
+ return 0;
+}
+
+/// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
+/// It rewrites:
+/// for ( type elem in collection) { stmts; }
+
+/// Into:
+/// {
+/// type elem;
+/// struct __objcFastEnumerationState enumState = { 0 };
+/// id __rw_items[16];
+/// id l_collection = (id)collection;
+/// unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
+/// objects:__rw_items count:16];
+/// if (limit) {
+/// unsigned long startMutations = *enumState.mutationsPtr;
+/// do {
+/// unsigned long counter = 0;
+/// do {
+/// if (startMutations != *enumState.mutationsPtr)
+/// objc_enumerationMutation(l_collection);
+/// elem = (type)enumState.itemsPtr[counter++];
+/// stmts;
+/// __continue_label: ;
+/// } while (counter < limit);
+/// } while (limit = [l_collection countByEnumeratingWithState:&enumState
+/// objects:__rw_items count:16]);
+/// elem = nil;
+/// __break_label: ;
+/// }
+/// else
+/// elem = nil;
+/// }
+///
+Stmt *RewriteObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
+ SourceLocation OrigEnd) {
+ assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty");
+ assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&
+ "ObjCForCollectionStmt Statement stack mismatch");
+ assert(!ObjCBcLabelNo.empty() &&
+ "ObjCForCollectionStmt - Label No stack empty");
+
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+ StringRef elementName;
+ std::string elementTypeAsString;
+ std::string buf;
+ buf = "\n{\n\t";
+ if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) {
+ // type elem;
+ NamedDecl* D = cast<NamedDecl>(DS->getSingleDecl());
+ QualType ElementType = cast<ValueDecl>(D)->getType();
+ if (ElementType->isObjCQualifiedIdType() ||
+ ElementType->isObjCQualifiedInterfaceType())
+ // Simply use 'id' for all qualified types.
+ elementTypeAsString = "id";
+ else
+ elementTypeAsString = ElementType.getAsString(Context->getPrintingPolicy());
+ buf += elementTypeAsString;
+ buf += " ";
+ elementName = D->getName();
+ buf += elementName;
+ buf += ";\n\t";
+ }
+ else {
+ DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement());
+ elementName = DR->getDecl()->getName();
+ ValueDecl *VD = cast<ValueDecl>(DR->getDecl());
+ if (VD->getType()->isObjCQualifiedIdType() ||
+ VD->getType()->isObjCQualifiedInterfaceType())
+ // Simply use 'id' for all qualified types.
+ elementTypeAsString = "id";
+ else
+ elementTypeAsString = VD->getType().getAsString(Context->getPrintingPolicy());
+ }
+
+ // struct __objcFastEnumerationState enumState = { 0 };
+ buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
+ // id __rw_items[16];
+ buf += "id __rw_items[16];\n\t";
+ // id l_collection = (id)
+ buf += "id l_collection = (id)";
+ // Find start location of 'collection' the hard way!
+ const char *startCollectionBuf = startBuf;
+ startCollectionBuf += 3; // skip 'for'
+ startCollectionBuf = strchr(startCollectionBuf, '(');
+ startCollectionBuf++; // skip '('
+ // find 'in' and skip it.
+ while (*startCollectionBuf != ' ' ||
+ *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' ||
+ (*(startCollectionBuf+3) != ' ' &&
+ *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '('))
+ startCollectionBuf++;
+ startCollectionBuf += 3;
+
+ // Replace: "for (type element in" with string constructed thus far.
+ ReplaceText(startLoc, startCollectionBuf - startBuf, buf);
+ // Replace ')' in for '(' type elem in collection ')' with ';'
+ SourceLocation rightParenLoc = S->getRParenLoc();
+ const char *rparenBuf = SM->getCharacterData(rightParenLoc);
+ SourceLocation lparenLoc = startLoc.getLocWithOffset(rparenBuf-startBuf);
+ buf = ";\n\t";
+
+ // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
+ // objects:__rw_items count:16];
+ // which is synthesized into:
+ // unsigned int limit =
+ // ((unsigned int (*)
+ // (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
+ // (void *)objc_msgSend)((id)l_collection,
+ // sel_registerName(
+ // "countByEnumeratingWithState:objects:count:"),
+ // (struct __objcFastEnumerationState *)&state,
+ // (id *)__rw_items, (unsigned int)16);
+ buf += "unsigned long limit =\n\t\t";
+ SynthCountByEnumWithState(buf);
+ buf += ";\n\t";
+ /// if (limit) {
+ /// unsigned long startMutations = *enumState.mutationsPtr;
+ /// do {
+ /// unsigned long counter = 0;
+ /// do {
+ /// if (startMutations != *enumState.mutationsPtr)
+ /// objc_enumerationMutation(l_collection);
+ /// elem = (type)enumState.itemsPtr[counter++];
+ buf += "if (limit) {\n\t";
+ buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
+ buf += "do {\n\t\t";
+ buf += "unsigned long counter = 0;\n\t\t";
+ buf += "do {\n\t\t\t";
+ buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
+ buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
+ buf += elementName;
+ buf += " = (";
+ buf += elementTypeAsString;
+ buf += ")enumState.itemsPtr[counter++];";
+ // Replace ')' in for '(' type elem in collection ')' with all of these.
+ ReplaceText(lparenLoc, 1, buf);
+
+ /// __continue_label: ;
+ /// } while (counter < limit);
+ /// } while (limit = [l_collection countByEnumeratingWithState:&enumState
+ /// objects:__rw_items count:16]);
+ /// elem = nil;
+ /// __break_label: ;
+ /// }
+ /// else
+ /// elem = nil;
+ /// }
+ ///
+ buf = ";\n\t";
+ buf += "__continue_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ buf += ": ;";
+ buf += "\n\t\t";
+ buf += "} while (counter < limit);\n\t";
+ buf += "} while (limit = ";
+ SynthCountByEnumWithState(buf);
+ buf += ");\n\t";
+ buf += elementName;
+ buf += " = ((";
+ buf += elementTypeAsString;
+ buf += ")0);\n\t";
+ buf += "__break_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ buf += ": ;\n\t";
+ buf += "}\n\t";
+ buf += "else\n\t\t";
+ buf += elementName;
+ buf += " = ((";
+ buf += elementTypeAsString;
+ buf += ")0);\n\t";
+ buf += "}\n";
+
+ // Insert all these *after* the statement body.
+ // FIXME: If this should support Obj-C++, support CXXTryStmt
+ if (isa<CompoundStmt>(S->getBody())) {
+ SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(1);
+ InsertText(endBodyLoc, buf);
+ } else {
+ /* Need to treat single statements specially. For example:
+ *
+ * for (A *a in b) if (stuff()) break;
+ * for (A *a in b) xxxyy;
+ *
+ * The following code simply scans ahead to the semi to find the actual end.
+ */
+ const char *stmtBuf = SM->getCharacterData(OrigEnd);
+ const char *semiBuf = strchr(stmtBuf, ';');
+ assert(semiBuf && "Can't find ';'");
+ SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(semiBuf-stmtBuf+1);
+ InsertText(endBodyLoc, buf);
+ }
+ Stmts.pop_back();
+ ObjCBcLabelNo.pop_back();
+ return 0;
+}
+
+/// RewriteObjCSynchronizedStmt -
+/// This routine rewrites @synchronized(expr) stmt;
+/// into:
+/// objc_sync_enter(expr);
+/// @try stmt @finally { objc_sync_exit(expr); }
+///
+Stmt *RewriteObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
+ // Get the start location and compute the semi location.
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '@') && "bogus @synchronized location");
+
+ std::string buf;
+ buf = "objc_sync_enter((id)";
+ const char *lparenBuf = startBuf;
+ while (*lparenBuf != '(') lparenBuf++;
+ ReplaceText(startLoc, lparenBuf-startBuf+1, buf);
+ // We can't use S->getSynchExpr()->getLocEnd() to find the end location, since
+ // the sync expression is typically a message expression that's already
+ // been rewritten! (which implies the SourceLocation's are invalid).
+ SourceLocation endLoc = S->getSynchBody()->getLocStart();
+ const char *endBuf = SM->getCharacterData(endLoc);
+ while (*endBuf != ')') endBuf--;
+ SourceLocation rparenLoc = startLoc.getLocWithOffset(endBuf-startBuf);
+ buf = ");\n";
+ // declare a new scope with two variables, _stack and _rethrow.
+ buf += "/* @try scope begin */ \n{ struct _objc_exception_data {\n";
+ buf += "int buf[18/*32-bit i386*/];\n";
+ buf += "char *pointers[4];} _stack;\n";
+ buf += "id volatile _rethrow = 0;\n";
+ buf += "objc_exception_try_enter(&_stack);\n";
+ buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n";
+ ReplaceText(rparenLoc, 1, buf);
+ startLoc = S->getSynchBody()->getLocEnd();
+ startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '}') && "bogus @synchronized block");
+ SourceLocation lastCurlyLoc = startLoc;
+ buf = "}\nelse {\n";
+ buf += " _rethrow = objc_exception_extract(&_stack);\n";
+ buf += "}\n";
+ buf += "{ /* implicit finally clause */\n";
+ buf += " if (!_rethrow) objc_exception_try_exit(&_stack);\n";
+
+ std::string syncBuf;
+ syncBuf += " objc_sync_exit(";
+
+ Expr *syncExpr = S->getSynchExpr();
+ CastKind CK = syncExpr->getType()->isObjCObjectPointerType()
+ ? CK_BitCast :
+ syncExpr->getType()->isBlockPointerType()
+ ? CK_BlockPointerToObjCPointerCast
+ : CK_CPointerToObjCPointerCast;
+ syncExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK, syncExpr);
+ std::string syncExprBufS;
+ llvm::raw_string_ostream syncExprBuf(syncExprBufS);
+ syncExpr->printPretty(syncExprBuf, *Context, 0,
+ PrintingPolicy(LangOpts));
+ syncBuf += syncExprBuf.str();
+ syncBuf += ");";
+
+ buf += syncBuf;
+ buf += "\n if (_rethrow) objc_exception_throw(_rethrow);\n";
+ buf += "}\n";
+ buf += "}";
+
+ ReplaceText(lastCurlyLoc, 1, buf);
+
+ bool hasReturns = false;
+ HasReturnStmts(S->getSynchBody(), hasReturns);
+ if (hasReturns)
+ RewriteSyncReturnStmts(S->getSynchBody(), syncBuf);
+
+ return 0;
+}
+
+void RewriteObjC::WarnAboutReturnGotoStmts(Stmt *S)
+{
+ // Perform a bottom up traversal of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI)
+ WarnAboutReturnGotoStmts(*CI);
+
+ if (isa<ReturnStmt>(S) || isa<GotoStmt>(S)) {
+ Diags.Report(Context->getFullLoc(S->getLocStart()),
+ TryFinallyContainsReturnDiag);
+ }
+ return;
+}
+
+void RewriteObjC::HasReturnStmts(Stmt *S, bool &hasReturns)
+{
+ // Perform a bottom up traversal of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI)
+ HasReturnStmts(*CI, hasReturns);
+
+ if (isa<ReturnStmt>(S))
+ hasReturns = true;
+ return;
+}
+
+void RewriteObjC::RewriteTryReturnStmts(Stmt *S) {
+ // Perform a bottom up traversal of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ RewriteTryReturnStmts(*CI);
+ }
+ if (isa<ReturnStmt>(S)) {
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ const char *semiBuf = strchr(startBuf, ';');
+ assert((*semiBuf == ';') && "RewriteTryReturnStmts: can't find ';'");
+ SourceLocation onePastSemiLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
+
+ std::string buf;
+ buf = "{ objc_exception_try_exit(&_stack); return";
+
+ ReplaceText(startLoc, 6, buf);
+ InsertText(onePastSemiLoc, "}");
+ }
+ return;
+}
+
+void RewriteObjC::RewriteSyncReturnStmts(Stmt *S, std::string syncExitBuf) {
+ // Perform a bottom up traversal of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ RewriteSyncReturnStmts(*CI, syncExitBuf);
+ }
+ if (isa<ReturnStmt>(S)) {
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ const char *semiBuf = strchr(startBuf, ';');
+ assert((*semiBuf == ';') && "RewriteSyncReturnStmts: can't find ';'");
+ SourceLocation onePastSemiLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
+
+ std::string buf;
+ buf = "{ objc_exception_try_exit(&_stack);";
+ buf += syncExitBuf;
+ buf += " return";
+
+ ReplaceText(startLoc, 6, buf);
+ InsertText(onePastSemiLoc, "}");
+ }
+ return;
+}
+
+Stmt *RewriteObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
+ // Get the start location and compute the semi location.
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '@') && "bogus @try location");
+
+ std::string buf;
+ // declare a new scope with two variables, _stack and _rethrow.
+ buf = "/* @try scope begin */ { struct _objc_exception_data {\n";
+ buf += "int buf[18/*32-bit i386*/];\n";
+ buf += "char *pointers[4];} _stack;\n";
+ buf += "id volatile _rethrow = 0;\n";
+ buf += "objc_exception_try_enter(&_stack);\n";
+ buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n";
+
+ ReplaceText(startLoc, 4, buf);
+
+ startLoc = S->getTryBody()->getLocEnd();
+ startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '}') && "bogus @try block");
+
+ SourceLocation lastCurlyLoc = startLoc;
+ if (S->getNumCatchStmts()) {
+ startLoc = startLoc.getLocWithOffset(1);
+ buf = " /* @catch begin */ else {\n";
+ buf += " id _caught = objc_exception_extract(&_stack);\n";
+ buf += " objc_exception_try_enter (&_stack);\n";
+ buf += " if (_setjmp(_stack.buf))\n";
+ buf += " _rethrow = objc_exception_extract(&_stack);\n";
+ buf += " else { /* @catch continue */";
+
+ InsertText(startLoc, buf);
+ } else { /* no catch list */
+ buf = "}\nelse {\n";
+ buf += " _rethrow = objc_exception_extract(&_stack);\n";
+ buf += "}";
+ ReplaceText(lastCurlyLoc, 1, buf);
+ }
+ Stmt *lastCatchBody = 0;
+ for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I) {
+ ObjCAtCatchStmt *Catch = S->getCatchStmt(I);
+ VarDecl *catchDecl = Catch->getCatchParamDecl();
+
+ if (I == 0)
+ buf = "if ("; // we are generating code for the first catch clause
+ else
+ buf = "else if (";
+ startLoc = Catch->getLocStart();
+ startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '@') && "bogus @catch location");
+
+ const char *lParenLoc = strchr(startBuf, '(');
+
+ if (Catch->hasEllipsis()) {
+ // Now rewrite the body...
+ lastCatchBody = Catch->getCatchBody();
+ SourceLocation bodyLoc = lastCatchBody->getLocStart();
+ const char *bodyBuf = SM->getCharacterData(bodyLoc);
+ assert(*SM->getCharacterData(Catch->getRParenLoc()) == ')' &&
+ "bogus @catch paren location");
+ assert((*bodyBuf == '{') && "bogus @catch body location");
+
+ buf += "1) { id _tmp = _caught;";
+ Rewrite.ReplaceText(startLoc, bodyBuf-startBuf+1, buf);
+ } else if (catchDecl) {
+ QualType t = catchDecl->getType();
+ if (t == Context->getObjCIdType()) {
+ buf += "1) { ";
+ ReplaceText(startLoc, lParenLoc-startBuf+1, buf);
+ } else if (const ObjCObjectPointerType *Ptr =
+ t->getAs<ObjCObjectPointerType>()) {
+ // Should be a pointer to a class.
+ ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
+ if (IDecl) {
+ buf += "objc_exception_match((struct objc_class *)objc_getClass(\"";
+ buf += IDecl->getNameAsString();
+ buf += "\"), (struct objc_object *)_caught)) { ";
+ ReplaceText(startLoc, lParenLoc-startBuf+1, buf);
+ }
+ }
+ // Now rewrite the body...
+ lastCatchBody = Catch->getCatchBody();
+ SourceLocation rParenLoc = Catch->getRParenLoc();
+ SourceLocation bodyLoc = lastCatchBody->getLocStart();
+ const char *bodyBuf = SM->getCharacterData(bodyLoc);
+ const char *rParenBuf = SM->getCharacterData(rParenLoc);
+ assert((*rParenBuf == ')') && "bogus @catch paren location");
+ assert((*bodyBuf == '{') && "bogus @catch body location");
+
+ // Here we replace ") {" with "= _caught;" (which initializes and
+ // declares the @catch parameter).
+ ReplaceText(rParenLoc, bodyBuf-rParenBuf+1, " = _caught;");
+ } else {
+ llvm_unreachable("@catch rewrite bug");
+ }
+ }
+ // Complete the catch list...
+ if (lastCatchBody) {
+ SourceLocation bodyLoc = lastCatchBody->getLocEnd();
+ assert(*SM->getCharacterData(bodyLoc) == '}' &&
+ "bogus @catch body location");
+
+ // Insert the last (implicit) else clause *before* the right curly brace.
+ bodyLoc = bodyLoc.getLocWithOffset(-1);
+ buf = "} /* last catch end */\n";
+ buf += "else {\n";
+ buf += " _rethrow = _caught;\n";
+ buf += " objc_exception_try_exit(&_stack);\n";
+ buf += "} } /* @catch end */\n";
+ if (!S->getFinallyStmt())
+ buf += "}\n";
+ InsertText(bodyLoc, buf);
+
+ // Set lastCurlyLoc
+ lastCurlyLoc = lastCatchBody->getLocEnd();
+ }
+ if (ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt()) {
+ startLoc = finalStmt->getLocStart();
+ startBuf = SM->getCharacterData(startLoc);
+ assert((*startBuf == '@') && "bogus @finally start");
+
+ ReplaceText(startLoc, 8, "/* @finally */");
+
+ Stmt *body = finalStmt->getFinallyBody();
+ SourceLocation startLoc = body->getLocStart();
+ SourceLocation endLoc = body->getLocEnd();
+ assert(*SM->getCharacterData(startLoc) == '{' &&
+ "bogus @finally body location");
+ assert(*SM->getCharacterData(endLoc) == '}' &&
+ "bogus @finally body location");
+
+ startLoc = startLoc.getLocWithOffset(1);
+ InsertText(startLoc, " if (!_rethrow) objc_exception_try_exit(&_stack);\n");
+ endLoc = endLoc.getLocWithOffset(-1);
+ InsertText(endLoc, " if (_rethrow) objc_exception_throw(_rethrow);\n");
+
+ // Set lastCurlyLoc
+ lastCurlyLoc = body->getLocEnd();
+
+ // Now check for any return/continue/go statements within the @try.
+ WarnAboutReturnGotoStmts(S->getTryBody());
+ } else { /* no finally clause - make sure we synthesize an implicit one */
+ buf = "{ /* implicit finally clause */\n";
+ buf += " if (!_rethrow) objc_exception_try_exit(&_stack);\n";
+ buf += " if (_rethrow) objc_exception_throw(_rethrow);\n";
+ buf += "}";
+ ReplaceText(lastCurlyLoc, 1, buf);
+
+ // Now check for any return/continue/go statements within the @try.
+ // The implicit finally clause won't called if the @try contains any
+ // jump statements.
+ bool hasReturns = false;
+ HasReturnStmts(S->getTryBody(), hasReturns);
+ if (hasReturns)
+ RewriteTryReturnStmts(S->getTryBody());
+ }
+ // Now emit the final closing curly brace...
+ lastCurlyLoc = lastCurlyLoc.getLocWithOffset(1);
+ InsertText(lastCurlyLoc, " } /* @try scope end */\n");
+ return 0;
+}
+
+// This can't be done with ReplaceStmt(S, ThrowExpr), since
+// the throw expression is typically a message expression that's already
+// been rewritten! (which implies the SourceLocation's are invalid).
+Stmt *RewriteObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
+ // Get the start location and compute the semi location.
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '@') && "bogus @throw location");
+
+ std::string buf;
+ /* void objc_exception_throw(id) __attribute__((noreturn)); */
+ if (S->getThrowExpr())
+ buf = "objc_exception_throw(";
+ else // add an implicit argument
+ buf = "objc_exception_throw(_caught";
+
+ // handle "@ throw" correctly.
+ const char *wBuf = strchr(startBuf, 'w');
+ assert((*wBuf == 'w') && "@throw: can't find 'w'");
+ ReplaceText(startLoc, wBuf-startBuf+1, buf);
+
+ const char *semiBuf = strchr(startBuf, ';');
+ assert((*semiBuf == ';') && "@throw: can't find ';'");
+ SourceLocation semiLoc = startLoc.getLocWithOffset(semiBuf-startBuf);
+ ReplaceText(semiLoc, 1, ");");
+ return 0;
+}
+
+Stmt *RewriteObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
+ // Create a new string expression.
+ QualType StrType = Context->getPointerType(Context->CharTy);
+ std::string StrEncoding;
+ Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding);
+ Expr *Replacement = StringLiteral::Create(*Context, StrEncoding,
+ StringLiteral::Ascii, false,
+ StrType, SourceLocation());
+ ReplaceStmt(Exp, Replacement);
+
+ // Replace this subexpr in the parent.
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return Replacement;
+}
+
+Stmt *RewriteObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
+ if (!SelGetUidFunctionDecl)
+ SynthSelGetUidFunctionDecl();
+ assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl");
+ // Create a call to sel_registerName("selName").
+ SmallVector<Expr*, 8> SelExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ SelExprs.push_back(StringLiteral::Create(*Context,
+ Exp->getSelector().getAsString(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
+ &SelExprs[0], SelExprs.size());
+ ReplaceStmt(Exp, SelExp);
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return SelExp;
+}
+
+CallExpr *RewriteObjC::SynthesizeCallToFunctionDecl(
+ FunctionDecl *FD, Expr **args, unsigned nargs, SourceLocation StartLoc,
+ SourceLocation EndLoc) {
+ // Get the type, we will need to reference it in a couple spots.
+ QualType msgSendType = FD->getType();
+
+ // Create a reference to the objc_msgSend() declaration.
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(FD, false, msgSendType,
+ VK_LValue, SourceLocation());
+
+ // Now, we cast the reference to a pointer to the objc_msgSend type.
+ QualType pToFunc = Context->getPointerType(msgSendType);
+ ImplicitCastExpr *ICE =
+ ImplicitCastExpr::Create(*Context, pToFunc, CK_FunctionToPointerDecay,
+ DRE, 0, VK_RValue);
+
+ const FunctionType *FT = msgSendType->getAs<FunctionType>();
+
+ CallExpr *Exp =
+ new (Context) CallExpr(*Context, ICE, args, nargs,
+ FT->getCallResultType(*Context),
+ VK_RValue, EndLoc);
+ return Exp;
+}
+
+static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
+ const char *&startRef, const char *&endRef) {
+ while (startBuf < endBuf) {
+ if (*startBuf == '<')
+ startRef = startBuf; // mark the start.
+ if (*startBuf == '>') {
+ if (startRef && *startRef == '<') {
+ endRef = startBuf; // mark the end.
+ return true;
+ }
+ return false;
+ }
+ startBuf++;
+ }
+ return false;
+}
+
+static void scanToNextArgument(const char *&argRef) {
+ int angle = 0;
+ while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
+ if (*argRef == '<')
+ angle++;
+ else if (*argRef == '>')
+ angle--;
+ argRef++;
+ }
+ assert(angle == 0 && "scanToNextArgument - bad protocol type syntax");
+}
+
+bool RewriteObjC::needToScanForQualifiers(QualType T) {
+ if (T->isObjCQualifiedIdType())
+ return true;
+ if (const PointerType *PT = T->getAs<PointerType>()) {
+ if (PT->getPointeeType()->isObjCQualifiedIdType())
+ return true;
+ }
+ if (T->isObjCObjectPointerType()) {
+ T = T->getPointeeType();
+ return T->isObjCQualifiedInterfaceType();
+ }
+ if (T->isArrayType()) {
+ QualType ElemTy = Context->getBaseElementType(T);
+ return needToScanForQualifiers(ElemTy);
+ }
+ return false;
+}
+
+void RewriteObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
+ QualType Type = E->getType();
+ if (needToScanForQualifiers(Type)) {
+ SourceLocation Loc, EndLoc;
+
+ if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E)) {
+ Loc = ECE->getLParenLoc();
+ EndLoc = ECE->getRParenLoc();
+ } else {
+ Loc = E->getLocStart();
+ EndLoc = E->getLocEnd();
+ }
+ // This will defend against trying to rewrite synthesized expressions.
+ if (Loc.isInvalid() || EndLoc.isInvalid())
+ return;
+
+ const char *startBuf = SM->getCharacterData(Loc);
+ const char *endBuf = SM->getCharacterData(EndLoc);
+ const char *startRef = 0, *endRef = 0;
+ if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
+ // Get the locations of the startRef, endRef.
+ SourceLocation LessLoc = Loc.getLocWithOffset(startRef-startBuf);
+ SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-startBuf+1);
+ // Comment out the protocol references.
+ InsertText(LessLoc, "/*");
+ InsertText(GreaterLoc, "*/");
+ }
+ }
+}
+
+void RewriteObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
+ SourceLocation Loc;
+ QualType Type;
+ const FunctionProtoType *proto = 0;
+ if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) {
+ Loc = VD->getLocation();
+ Type = VD->getType();
+ }
+ else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) {
+ Loc = FD->getLocation();
+ // Check for ObjC 'id' and class types that have been adorned with protocol
+ // information (id<p>, C<p>*). The protocol references need to be rewritten!
+ const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
+ assert(funcType && "missing function type");
+ proto = dyn_cast<FunctionProtoType>(funcType);
+ if (!proto)
+ return;
+ Type = proto->getResultType();
+ }
+ else if (FieldDecl *FD = dyn_cast<FieldDecl>(Dcl)) {
+ Loc = FD->getLocation();
+ Type = FD->getType();
+ }
+ else
+ return;
+
+ if (needToScanForQualifiers(Type)) {
+ // Since types are unique, we need to scan the buffer.
+
+ const char *endBuf = SM->getCharacterData(Loc);
+ const char *startBuf = endBuf;
+ while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart)
+ startBuf--; // scan backward (from the decl location) for return type.
+ const char *startRef = 0, *endRef = 0;
+ if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
+ // Get the locations of the startRef, endRef.
+ SourceLocation LessLoc = Loc.getLocWithOffset(startRef-endBuf);
+ SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-endBuf+1);
+ // Comment out the protocol references.
+ InsertText(LessLoc, "/*");
+ InsertText(GreaterLoc, "*/");
+ }
+ }
+ if (!proto)
+ return; // most likely, was a variable
+ // Now check arguments.
+ const char *startBuf = SM->getCharacterData(Loc);
+ const char *startFuncBuf = startBuf;
+ for (unsigned i = 0; i < proto->getNumArgs(); i++) {
+ if (needToScanForQualifiers(proto->getArgType(i))) {
+ // Since types are unique, we need to scan the buffer.
+
+ const char *endBuf = startBuf;
+ // scan forward (from the decl location) for argument types.
+ scanToNextArgument(endBuf);
+ const char *startRef = 0, *endRef = 0;
+ if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
+ // Get the locations of the startRef, endRef.
+ SourceLocation LessLoc =
+ Loc.getLocWithOffset(startRef-startFuncBuf);
+ SourceLocation GreaterLoc =
+ Loc.getLocWithOffset(endRef-startFuncBuf+1);
+ // Comment out the protocol references.
+ InsertText(LessLoc, "/*");
+ InsertText(GreaterLoc, "*/");
+ }
+ startBuf = ++endBuf;
+ }
+ else {
+ // If the function name is derived from a macro expansion, then the
+ // argument buffer will not follow the name. Need to speak with Chris.
+ while (*startBuf && *startBuf != ')' && *startBuf != ',')
+ startBuf++; // scan forward (from the decl location) for argument types.
+ startBuf++;
+ }
+ }
+}
+
+void RewriteObjC::RewriteTypeOfDecl(VarDecl *ND) {
+ QualType QT = ND->getType();
+ const Type* TypePtr = QT->getAs<Type>();
+ if (!isa<TypeOfExprType>(TypePtr))
+ return;
+ while (isa<TypeOfExprType>(TypePtr)) {
+ const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
+ QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
+ TypePtr = QT->getAs<Type>();
+ }
+ // FIXME. This will not work for multiple declarators; as in:
+ // __typeof__(a) b,c,d;
+ std::string TypeAsString(QT.getAsString(Context->getPrintingPolicy()));
+ SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
+ const char *startBuf = SM->getCharacterData(DeclLoc);
+ if (ND->getInit()) {
+ std::string Name(ND->getNameAsString());
+ TypeAsString += " " + Name + " = ";
+ Expr *E = ND->getInit();
+ SourceLocation startLoc;
+ if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
+ startLoc = ECE->getLParenLoc();
+ else
+ startLoc = E->getLocStart();
+ startLoc = SM->getExpansionLoc(startLoc);
+ const char *endBuf = SM->getCharacterData(startLoc);
+ ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
+ }
+ else {
+ SourceLocation X = ND->getLocEnd();
+ X = SM->getExpansionLoc(X);
+ const char *endBuf = SM->getCharacterData(X);
+ ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
+ }
+}
+
+// SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
+void RewriteObjC::SynthSelGetUidFunctionDecl() {
+ IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
+ QualType getFuncType =
+ getSimpleFunctionType(Context->getObjCSelType(), &ArgTys[0], ArgTys.size());
+ SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ SelGetUidIdent, getFuncType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+void RewriteObjC::RewriteFunctionDecl(FunctionDecl *FD) {
+ // declared in <objc/objc.h>
+ if (FD->getIdentifier() &&
+ FD->getName() == "sel_registerName") {
+ SelGetUidFunctionDecl = FD;
+ return;
+ }
+ RewriteObjCQualifiedInterfaceTypes(FD);
+}
+
+void RewriteObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
+ std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
+ const char *argPtr = TypeString.c_str();
+ if (!strchr(argPtr, '^')) {
+ Str += TypeString;
+ return;
+ }
+ while (*argPtr) {
+ Str += (*argPtr == '^' ? '*' : *argPtr);
+ argPtr++;
+ }
+}
+
+// FIXME. Consolidate this routine with RewriteBlockPointerType.
+void RewriteObjC::RewriteBlockPointerTypeVariable(std::string& Str,
+ ValueDecl *VD) {
+ QualType Type = VD->getType();
+ std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
+ const char *argPtr = TypeString.c_str();
+ int paren = 0;
+ while (*argPtr) {
+ switch (*argPtr) {
+ case '(':
+ Str += *argPtr;
+ paren++;
+ break;
+ case ')':
+ Str += *argPtr;
+ paren--;
+ break;
+ case '^':
+ Str += '*';
+ if (paren == 1)
+ Str += VD->getNameAsString();
+ break;
+ default:
+ Str += *argPtr;
+ break;
+ }
+ argPtr++;
+ }
+}
+
+
+void RewriteObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
+ SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
+ const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
+ const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(funcType);
+ if (!proto)
+ return;
+ QualType Type = proto->getResultType();
+ std::string FdStr = Type.getAsString(Context->getPrintingPolicy());
+ FdStr += " ";
+ FdStr += FD->getName();
+ FdStr += "(";
+ unsigned numArgs = proto->getNumArgs();
+ for (unsigned i = 0; i < numArgs; i++) {
+ QualType ArgType = proto->getArgType(i);
+ RewriteBlockPointerType(FdStr, ArgType);
+ if (i+1 < numArgs)
+ FdStr += ", ";
+ }
+ FdStr += ");\n";
+ InsertText(FunLocStart, FdStr);
+ CurFunctionDeclToDeclareForBlock = 0;
+}
+
+// SynthSuperContructorFunctionDecl - id objc_super(id obj, id super);
+void RewriteObjC::SynthSuperContructorFunctionDecl() {
+ if (SuperContructorFunctionDecl)
+ return;
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("__rw_objc_super");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size());
+ SuperContructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
+void RewriteObjC::SynthMsgSendFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(struct objc_super *, SEL op, ...);
+void RewriteObjC::SynthMsgSendSuperFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
+ SmallVector<QualType, 16> ArgTys;
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("objc_super"));
+ QualType argT = Context->getPointerType(Context->getTagDeclType(RD));
+ assert(!argT.isNull() && "Can't build 'struct objc_super *' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
+void RewriteObjC::SynthMsgSendStretFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendSuperStretFunctionDecl -
+// id objc_msgSendSuper_stret(struct objc_super *, SEL op, ...);
+void RewriteObjC::SynthMsgSendSuperStretFunctionDecl() {
+ IdentifierInfo *msgSendIdent =
+ &Context->Idents.get("objc_msgSendSuper_stret");
+ SmallVector<QualType, 16> ArgTys;
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("objc_super"));
+ QualType argT = Context->getPointerType(Context->getTagDeclType(RD));
+ assert(!argT.isNull() && "Can't build 'struct objc_super *' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
+void RewriteObjC::SynthMsgSendFpretFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->DoubleTy,
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthGetClassFunctionDecl - id objc_getClass(const char *name);
+void RewriteObjC::SynthGetClassFunctionDecl() {
+ IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
+ QualType getClassType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size());
+ GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ getClassIdent, getClassType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
+void RewriteObjC::SynthGetSuperClassFunctionDecl() {
+ IdentifierInfo *getSuperClassIdent =
+ &Context->Idents.get("class_getSuperclass");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getObjCClassType());
+ QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
+ &ArgTys[0], ArgTys.size());
+ GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ getSuperClassIdent,
+ getClassType, 0,
+ SC_Extern,
+ SC_None,
+ false);
+}
+
+// SynthGetMetaClassFunctionDecl - id objc_getMetaClass(const char *name);
+void RewriteObjC::SynthGetMetaClassFunctionDecl() {
+ IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
+ QualType getClassType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size());
+ GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ getClassIdent, getClassType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+Stmt *RewriteObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
+ QualType strType = getConstantStringStructType();
+
+ std::string S = "__NSConstantStringImpl_";
+
+ std::string tmpName = InFileName;
+ unsigned i;
+ for (i=0; i < tmpName.length(); i++) {
+ char c = tmpName.at(i);
+ // replace any non alphanumeric characters with '_'.
+ if (!isalpha(c) && (c < '0' || c > '9'))
+ tmpName[i] = '_';
+ }
+ S += tmpName;
+ S += "_";
+ S += utostr(NumObjCStringLiterals++);
+
+ Preamble += "static __NSConstantStringImpl " + S;
+ Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
+ Preamble += "0x000007c8,"; // utf8_str
+ // The pretty printer for StringLiteral handles escape characters properly.
+ std::string prettyBufS;
+ llvm::raw_string_ostream prettyBuf(prettyBufS);
+ Exp->getString()->printPretty(prettyBuf, *Context, 0,
+ PrintingPolicy(LangOpts));
+ Preamble += prettyBuf.str();
+ Preamble += ",";
+ Preamble += utostr(Exp->getString()->getByteLength()) + "};\n";
+
+ VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
+ SourceLocation(), &Context->Idents.get(S),
+ strType, 0, SC_Static, SC_None);
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(NewVD, false, strType, VK_LValue,
+ SourceLocation());
+ Expr *Unop = new (Context) UnaryOperator(DRE, UO_AddrOf,
+ Context->getPointerType(DRE->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ // cast to NSConstantString *
+ CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Exp->getType(),
+ CK_CPointerToObjCPointerCast, Unop);
+ ReplaceStmt(Exp, cast);
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return cast;
+}
+
+// struct objc_super { struct objc_object *receiver; struct objc_class *super; };
+QualType RewriteObjC::getSuperStructType() {
+ if (!SuperStructDecl) {
+ SuperStructDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("objc_super"));
+ QualType FieldTypes[2];
+
+ // struct objc_object *receiver;
+ FieldTypes[0] = Context->getObjCIdType();
+ // struct objc_class *super;
+ FieldTypes[1] = Context->getObjCClassType();
+
+ // Create fields
+ for (unsigned i = 0; i < 2; ++i) {
+ SuperStructDecl->addDecl(FieldDecl::Create(*Context, SuperStructDecl,
+ SourceLocation(),
+ SourceLocation(), 0,
+ FieldTypes[i], 0,
+ /*BitWidth=*/0,
+ /*Mutable=*/false,
+ /*HasInit=*/false));
+ }
+
+ SuperStructDecl->completeDefinition();
+ }
+ return Context->getTagDeclType(SuperStructDecl);
+}
+
+QualType RewriteObjC::getConstantStringStructType() {
+ if (!ConstantStringDecl) {
+ ConstantStringDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("__NSConstantStringImpl"));
+ QualType FieldTypes[4];
+
+ // struct objc_object *receiver;
+ FieldTypes[0] = Context->getObjCIdType();
+ // int flags;
+ FieldTypes[1] = Context->IntTy;
+ // char *str;
+ FieldTypes[2] = Context->getPointerType(Context->CharTy);
+ // long length;
+ FieldTypes[3] = Context->LongTy;
+
+ // Create fields
+ for (unsigned i = 0; i < 4; ++i) {
+ ConstantStringDecl->addDecl(FieldDecl::Create(*Context,
+ ConstantStringDecl,
+ SourceLocation(),
+ SourceLocation(), 0,
+ FieldTypes[i], 0,
+ /*BitWidth=*/0,
+ /*Mutable=*/true,
+ /*HasInit=*/false));
+ }
+
+ ConstantStringDecl->completeDefinition();
+ }
+ return Context->getTagDeclType(ConstantStringDecl);
+}
+
+Stmt *RewriteObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
+ SourceLocation StartLoc,
+ SourceLocation EndLoc) {
+ if (!SelGetUidFunctionDecl)
+ SynthSelGetUidFunctionDecl();
+ if (!MsgSendFunctionDecl)
+ SynthMsgSendFunctionDecl();
+ if (!MsgSendSuperFunctionDecl)
+ SynthMsgSendSuperFunctionDecl();
+ if (!MsgSendStretFunctionDecl)
+ SynthMsgSendStretFunctionDecl();
+ if (!MsgSendSuperStretFunctionDecl)
+ SynthMsgSendSuperStretFunctionDecl();
+ if (!MsgSendFpretFunctionDecl)
+ SynthMsgSendFpretFunctionDecl();
+ if (!GetClassFunctionDecl)
+ SynthGetClassFunctionDecl();
+ if (!GetSuperClassFunctionDecl)
+ SynthGetSuperClassFunctionDecl();
+ if (!GetMetaClassFunctionDecl)
+ SynthGetMetaClassFunctionDecl();
+
+ // default to objc_msgSend().
+ FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
+ // May need to use objc_msgSend_stret() as well.
+ FunctionDecl *MsgSendStretFlavor = 0;
+ if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
+ QualType resultType = mDecl->getResultType();
+ if (resultType->isRecordType())
+ MsgSendStretFlavor = MsgSendStretFunctionDecl;
+ else if (resultType->isRealFloatingType())
+ MsgSendFlavor = MsgSendFpretFunctionDecl;
+ }
+
+ // Synthesize a call to objc_msgSend().
+ SmallVector<Expr*, 8> MsgExprs;
+ switch (Exp->getReceiverKind()) {
+ case ObjCMessageExpr::SuperClass: {
+ MsgSendFlavor = MsgSendSuperFunctionDecl;
+ if (MsgSendStretFlavor)
+ MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
+ assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
+
+ ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
+
+ SmallVector<Expr*, 4> InitExprs;
+
+ // set the receiver to self, the first argument to all methods.
+ InitExprs.push_back(
+ NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK_BitCast,
+ new (Context) DeclRefExpr(CurMethodDef->getSelfDecl(),
+ false,
+ Context->getObjCIdType(),
+ VK_RValue,
+ SourceLocation()))
+ ); // set the 'receiver'.
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ SmallVector<Expr*, 8> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ ClassDecl->getIdentifier()->getName(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc,
+ EndLoc);
+ // (Class)objc_getClass("CurrentClass")
+ CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
+ Context->getObjCClassType(),
+ CK_BitCast, Cls);
+ ClsExprs.clear();
+ ClsExprs.push_back(ArgExpr);
+ Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl,
+ &ClsExprs[0], ClsExprs.size(),
+ StartLoc, EndLoc);
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ // To turn off a warning, type-cast to 'id'
+ InitExprs.push_back( // set 'super class', using class_getSuperclass().
+ NoTypeInfoCStyleCastExpr(Context,
+ Context->getObjCIdType(),
+ CK_BitCast, Cls));
+ // struct objc_super
+ QualType superType = getSuperStructType();
+ Expr *SuperRep;
+
+ if (LangOpts.MicrosoftExt) {
+ SynthSuperContructorFunctionDecl();
+ // Simulate a contructor call...
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(SuperContructorFunctionDecl,
+ false, superType, VK_LValue,
+ SourceLocation());
+ SuperRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0],
+ InitExprs.size(),
+ superType, VK_LValue,
+ SourceLocation());
+ // The code for super is a little tricky to prevent collision with
+ // the structure definition in the header. The rewriter has it's own
+ // internal definition (__rw_objc_super) that is uses. This is why
+ // we need the cast below. For example:
+ // (struct objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
+ //
+ SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
+ Context->getPointerType(SuperRep->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ SuperRep = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(superType),
+ CK_BitCast, SuperRep);
+ } else {
+ // (struct objc_super) { <exprs from above> }
+ InitListExpr *ILE =
+ new (Context) InitListExpr(*Context, SourceLocation(),
+ &InitExprs[0], InitExprs.size(),
+ SourceLocation());
+ TypeSourceInfo *superTInfo
+ = Context->getTrivialTypeSourceInfo(superType);
+ SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
+ superType, VK_LValue,
+ ILE, false);
+ // struct objc_super *
+ SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
+ Context->getPointerType(SuperRep->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ }
+ MsgExprs.push_back(SuperRep);
+ break;
+ }
+
+ case ObjCMessageExpr::Class: {
+ SmallVector<Expr*, 8> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ ObjCInterfaceDecl *Class
+ = Exp->getClassReceiver()->getAs<ObjCObjectType>()->getInterface();
+ IdentifierInfo *clsName = Class->getIdentifier();
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ clsName->getName(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc, EndLoc);
+ MsgExprs.push_back(Cls);
+ break;
+ }
+
+ case ObjCMessageExpr::SuperInstance:{
+ MsgSendFlavor = MsgSendSuperFunctionDecl;
+ if (MsgSendStretFlavor)
+ MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
+ assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
+ ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
+ SmallVector<Expr*, 4> InitExprs;
+
+ InitExprs.push_back(
+ NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK_BitCast,
+ new (Context) DeclRefExpr(CurMethodDef->getSelfDecl(),
+ false,
+ Context->getObjCIdType(),
+ VK_RValue, SourceLocation()))
+ ); // set the 'receiver'.
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ SmallVector<Expr*, 8> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ ClassDecl->getIdentifier()->getName(),
+ StringLiteral::Ascii, false, argType,
+ SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc, EndLoc);
+ // (Class)objc_getClass("CurrentClass")
+ CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
+ Context->getObjCClassType(),
+ CK_BitCast, Cls);
+ ClsExprs.clear();
+ ClsExprs.push_back(ArgExpr);
+ Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl,
+ &ClsExprs[0], ClsExprs.size(),
+ StartLoc, EndLoc);
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ // To turn off a warning, type-cast to 'id'
+ InitExprs.push_back(
+ // set 'super class', using class_getSuperclass().
+ NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK_BitCast, Cls));
+ // struct objc_super
+ QualType superType = getSuperStructType();
+ Expr *SuperRep;
+
+ if (LangOpts.MicrosoftExt) {
+ SynthSuperContructorFunctionDecl();
+ // Simulate a contructor call...
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(SuperContructorFunctionDecl,
+ false, superType, VK_LValue,
+ SourceLocation());
+ SuperRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0],
+ InitExprs.size(),
+ superType, VK_LValue, SourceLocation());
+ // The code for super is a little tricky to prevent collision with
+ // the structure definition in the header. The rewriter has it's own
+ // internal definition (__rw_objc_super) that is uses. This is why
+ // we need the cast below. For example:
+ // (struct objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
+ //
+ SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
+ Context->getPointerType(SuperRep->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ SuperRep = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(superType),
+ CK_BitCast, SuperRep);
+ } else {
+ // (struct objc_super) { <exprs from above> }
+ InitListExpr *ILE =
+ new (Context) InitListExpr(*Context, SourceLocation(),
+ &InitExprs[0], InitExprs.size(),
+ SourceLocation());
+ TypeSourceInfo *superTInfo
+ = Context->getTrivialTypeSourceInfo(superType);
+ SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
+ superType, VK_RValue, ILE,
+ false);
+ }
+ MsgExprs.push_back(SuperRep);
+ break;
+ }
+
+ case ObjCMessageExpr::Instance: {
+ // Remove all type-casts because it may contain objc-style types; e.g.
+ // Foo<Proto> *.
+ Expr *recExpr = Exp->getInstanceReceiver();
+ while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(recExpr))
+ recExpr = CE->getSubExpr();
+ CastKind CK = recExpr->getType()->isObjCObjectPointerType()
+ ? CK_BitCast : recExpr->getType()->isBlockPointerType()
+ ? CK_BlockPointerToObjCPointerCast
+ : CK_CPointerToObjCPointerCast;
+
+ recExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK, recExpr);
+ MsgExprs.push_back(recExpr);
+ break;
+ }
+ }
+
+ // Create a call to sel_registerName("selName"), it will be the 2nd argument.
+ SmallVector<Expr*, 8> SelExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ SelExprs.push_back(StringLiteral::Create(*Context,
+ Exp->getSelector().getAsString(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
+ &SelExprs[0], SelExprs.size(),
+ StartLoc,
+ EndLoc);
+ MsgExprs.push_back(SelExp);
+
+ // Now push any user supplied arguments.
+ for (unsigned i = 0; i < Exp->getNumArgs(); i++) {
+ Expr *userExpr = Exp->getArg(i);
+ // Make all implicit casts explicit...ICE comes in handy:-)
+ if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
+ // Reuse the ICE type, it is exactly what the doctor ordered.
+ QualType type = ICE->getType();
+ if (needToScanForQualifiers(type))
+ type = Context->getObjCIdType();
+ // Make sure we convert "type (^)(...)" to "type (*)(...)".
+ (void)convertBlockPointerToFunctionPointer(type);
+ const Expr *SubExpr = ICE->IgnoreParenImpCasts();
+ CastKind CK;
+ if (SubExpr->getType()->isIntegralType(*Context) &&
+ type->isBooleanType()) {
+ CK = CK_IntegralToBoolean;
+ } else if (type->isObjCObjectPointerType()) {
+ if (SubExpr->getType()->isBlockPointerType()) {
+ CK = CK_BlockPointerToObjCPointerCast;
+ } else if (SubExpr->getType()->isPointerType()) {
+ CK = CK_CPointerToObjCPointerCast;
+ } else {
+ CK = CK_BitCast;
+ }
+ } else {
+ CK = CK_BitCast;
+ }
+
+ userExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, userExpr);
+ }
+ // Make id<P...> cast into an 'id' cast.
+ else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(userExpr)) {
+ if (CE->getType()->isObjCQualifiedIdType()) {
+ while ((CE = dyn_cast<CStyleCastExpr>(userExpr)))
+ userExpr = CE->getSubExpr();
+ CastKind CK;
+ if (userExpr->getType()->isIntegralType(*Context)) {
+ CK = CK_IntegralToPointer;
+ } else if (userExpr->getType()->isBlockPointerType()) {
+ CK = CK_BlockPointerToObjCPointerCast;
+ } else if (userExpr->getType()->isPointerType()) {
+ CK = CK_CPointerToObjCPointerCast;
+ } else {
+ CK = CK_BitCast;
+ }
+ userExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK, userExpr);
+ }
+ }
+ MsgExprs.push_back(userExpr);
+ // We've transferred the ownership to MsgExprs. For now, we *don't* null
+ // out the argument in the original expression (since we aren't deleting
+ // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
+ //Exp->setArg(i, 0);
+ }
+ // Generate the funky cast.
+ CastExpr *cast;
+ SmallVector<QualType, 8> ArgTypes;
+ QualType returnType;
+
+ // Push 'id' and 'SEL', the 2 implicit arguments.
+ if (MsgSendFlavor == MsgSendSuperFunctionDecl)
+ ArgTypes.push_back(Context->getPointerType(getSuperStructType()));
+ else
+ ArgTypes.push_back(Context->getObjCIdType());
+ ArgTypes.push_back(Context->getObjCSelType());
+ if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
+ // Push any user argument types.
+ for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
+ E = OMD->param_end(); PI != E; ++PI) {
+ QualType t = (*PI)->getType()->isObjCQualifiedIdType()
+ ? Context->getObjCIdType()
+ : (*PI)->getType();
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ (void)convertBlockPointerToFunctionPointer(t);
+ ArgTypes.push_back(t);
+ }
+ returnType = Exp->getType();
+ convertToUnqualifiedObjCType(returnType);
+ (void)convertBlockPointerToFunctionPointer(returnType);
+ } else {
+ returnType = Context->getObjCIdType();
+ }
+ // Get the type, we will need to reference it in a couple spots.
+ QualType msgSendType = MsgSendFlavor->getType();
+
+ // Create a reference to the objc_msgSend() declaration.
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(MsgSendFlavor, false, msgSendType,
+ VK_LValue, SourceLocation());
+
+ // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
+ // If we don't do this cast, we get the following bizarre warning/note:
+ // xx.m:13: warning: function called through a non-compatible type
+ // xx.m:13: note: if this code is reached, the program will abort
+ cast = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(Context->VoidTy),
+ CK_BitCast, DRE);
+
+ // Now do the "normal" pointer to function cast.
+ QualType castType =
+ getSimpleFunctionType(returnType, &ArgTypes[0], ArgTypes.size(),
+ // If we don't have a method decl, force a variadic cast.
+ Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : true);
+ castType = Context->getPointerType(castType);
+ cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
+ cast);
+
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
+
+ const FunctionType *FT = msgSendType->getAs<FunctionType>();
+ CallExpr *CE = new (Context) CallExpr(*Context, PE, &MsgExprs[0],
+ MsgExprs.size(),
+ FT->getResultType(), VK_RValue,
+ EndLoc);
+ Stmt *ReplacingStmt = CE;
+ if (MsgSendStretFlavor) {
+ // We have the method which returns a struct/union. Must also generate
+ // call to objc_msgSend_stret and hang both varieties on a conditional
+ // expression which dictate which one to envoke depending on size of
+ // method's return type.
+
+ // Create a reference to the objc_msgSend_stret() declaration.
+ DeclRefExpr *STDRE = new (Context) DeclRefExpr(MsgSendStretFlavor,
+ false, msgSendType,
+ VK_LValue, SourceLocation());
+ // Need to cast objc_msgSend_stret to "void *" (see above comment).
+ cast = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(Context->VoidTy),
+ CK_BitCast, STDRE);
+ // Now do the "normal" pointer to function cast.
+ castType = getSimpleFunctionType(returnType, &ArgTypes[0], ArgTypes.size(),
+ Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : false);
+ castType = Context->getPointerType(castType);
+ cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
+ cast);
+
+ // Don't forget the parens to enforce the proper binding.
+ PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), cast);
+
+ FT = msgSendType->getAs<FunctionType>();
+ CallExpr *STCE = new (Context) CallExpr(*Context, PE, &MsgExprs[0],
+ MsgExprs.size(),
+ FT->getResultType(), VK_RValue,
+ SourceLocation());
+
+ // Build sizeof(returnType)
+ UnaryExprOrTypeTraitExpr *sizeofExpr =
+ new (Context) UnaryExprOrTypeTraitExpr(UETT_SizeOf,
+ Context->getTrivialTypeSourceInfo(returnType),
+ Context->getSizeType(), SourceLocation(),
+ SourceLocation());
+ // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
+ // FIXME: Value of 8 is base on ppc32/x86 ABI for the most common cases.
+ // For X86 it is more complicated and some kind of target specific routine
+ // is needed to decide what to do.
+ unsigned IntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
+ IntegerLiteral *limit = IntegerLiteral::Create(*Context,
+ llvm::APInt(IntSize, 8),
+ Context->IntTy,
+ SourceLocation());
+ BinaryOperator *lessThanExpr =
+ new (Context) BinaryOperator(sizeofExpr, limit, BO_LE, Context->IntTy,
+ VK_RValue, OK_Ordinary, SourceLocation());
+ // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
+ ConditionalOperator *CondExpr =
+ new (Context) ConditionalOperator(lessThanExpr,
+ SourceLocation(), CE,
+ SourceLocation(), STCE,
+ returnType, VK_RValue, OK_Ordinary);
+ ReplacingStmt = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
+ CondExpr);
+ }
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return ReplacingStmt;
+}
+
+Stmt *RewriteObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
+ Stmt *ReplacingStmt = SynthMessageExpr(Exp, Exp->getLocStart(),
+ Exp->getLocEnd());
+
+ // Now do the actual rewrite.
+ ReplaceStmt(Exp, ReplacingStmt);
+
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return ReplacingStmt;
+}
+
+// typedef struct objc_object Protocol;
+QualType RewriteObjC::getProtocolType() {
+ if (!ProtocolTypeDecl) {
+ TypeSourceInfo *TInfo
+ = Context->getTrivialTypeSourceInfo(Context->getObjCIdType());
+ ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("Protocol"),
+ TInfo);
+ }
+ return Context->getTypeDeclType(ProtocolTypeDecl);
+}
+
+/// RewriteObjCProtocolExpr - Rewrite a protocol expression into
+/// a synthesized/forward data reference (to the protocol's metadata).
+/// The forward references (and metadata) are generated in
+/// RewriteObjC::HandleTranslationUnit().
+Stmt *RewriteObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
+ std::string Name = "_OBJC_PROTOCOL_" + Exp->getProtocol()->getNameAsString();
+ IdentifierInfo *ID = &Context->Idents.get(Name);
+ VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
+ SourceLocation(), ID, getProtocolType(), 0,
+ SC_Extern, SC_None);
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(VD, false, getProtocolType(),
+ VK_LValue, SourceLocation());
+ Expr *DerefExpr = new (Context) UnaryOperator(DRE, UO_AddrOf,
+ Context->getPointerType(DRE->getType()),
+ VK_RValue, OK_Ordinary, SourceLocation());
+ CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, DerefExpr->getType(),
+ CK_BitCast,
+ DerefExpr);
+ ReplaceStmt(Exp, castExpr);
+ ProtocolExprDecls.insert(Exp->getProtocol()->getCanonicalDecl());
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return castExpr;
+
+}
+
+bool RewriteObjC::BufferContainsPPDirectives(const char *startBuf,
+ const char *endBuf) {
+ while (startBuf < endBuf) {
+ if (*startBuf == '#') {
+ // Skip whitespace.
+ for (++startBuf; startBuf[0] == ' ' || startBuf[0] == '\t'; ++startBuf)
+ ;
+ if (!strncmp(startBuf, "if", strlen("if")) ||
+ !strncmp(startBuf, "ifdef", strlen("ifdef")) ||
+ !strncmp(startBuf, "ifndef", strlen("ifndef")) ||
+ !strncmp(startBuf, "define", strlen("define")) ||
+ !strncmp(startBuf, "undef", strlen("undef")) ||
+ !strncmp(startBuf, "else", strlen("else")) ||
+ !strncmp(startBuf, "elif", strlen("elif")) ||
+ !strncmp(startBuf, "endif", strlen("endif")) ||
+ !strncmp(startBuf, "pragma", strlen("pragma")) ||
+ !strncmp(startBuf, "include", strlen("include")) ||
+ !strncmp(startBuf, "import", strlen("import")) ||
+ !strncmp(startBuf, "include_next", strlen("include_next")))
+ return true;
+ }
+ startBuf++;
+ }
+ return false;
+}
+
+/// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
+/// an objective-c class with ivars.
+void RewriteObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
+ std::string &Result) {
+ assert(CDecl && "Class missing in SynthesizeObjCInternalStruct");
+ assert(CDecl->getName() != "" &&
+ "Name missing in SynthesizeObjCInternalStruct");
+ // Do not synthesize more than once.
+ if (ObjCSynthesizedStructs.count(CDecl))
+ return;
+ ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
+ int NumIvars = CDecl->ivar_size();
+ SourceLocation LocStart = CDecl->getLocStart();
+ SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+
+ // If no ivars and no root or if its root, directly or indirectly,
+ // have no ivars (thus not synthesized) then no need to synthesize this class.
+ if ((!CDecl->isThisDeclarationADefinition() || NumIvars == 0) &&
+ (!RCDecl || !ObjCSynthesizedStructs.count(RCDecl))) {
+ endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
+ ReplaceText(LocStart, endBuf-startBuf, Result);
+ return;
+ }
+
+ // FIXME: This has potential of causing problem. If
+ // SynthesizeObjCInternalStruct is ever called recursively.
+ Result += "\nstruct ";
+ Result += CDecl->getNameAsString();
+ if (LangOpts.MicrosoftExt)
+ Result += "_IMPL";
+
+ if (NumIvars > 0) {
+ const char *cursor = strchr(startBuf, '{');
+ assert((cursor && endBuf)
+ && "SynthesizeObjCInternalStruct - malformed @interface");
+ // If the buffer contains preprocessor directives, we do more fine-grained
+ // rewrites. This is intended to fix code that looks like (which occurs in
+ // NSURL.h, for example):
+ //
+ // #ifdef XYZ
+ // @interface Foo : NSObject
+ // #else
+ // @interface FooBar : NSObject
+ // #endif
+ // {
+ // int i;
+ // }
+ // @end
+ //
+ // This clause is segregated to avoid breaking the common case.
+ if (BufferContainsPPDirectives(startBuf, cursor)) {
+ SourceLocation L = RCDecl ? CDecl->getSuperClassLoc() :
+ CDecl->getAtStartLoc();
+ const char *endHeader = SM->getCharacterData(L);
+ endHeader += Lexer::MeasureTokenLength(L, *SM, LangOpts);
+
+ if (CDecl->protocol_begin() != CDecl->protocol_end()) {
+ // advance to the end of the referenced protocols.
+ while (endHeader < cursor && *endHeader != '>') endHeader++;
+ endHeader++;
+ }
+ // rewrite the original header
+ ReplaceText(LocStart, endHeader-startBuf, Result);
+ } else {
+ // rewrite the original header *without* disturbing the '{'
+ ReplaceText(LocStart, cursor-startBuf, Result);
+ }
+ if (RCDecl && ObjCSynthesizedStructs.count(RCDecl)) {
+ Result = "\n struct ";
+ Result += RCDecl->getNameAsString();
+ Result += "_IMPL ";
+ Result += RCDecl->getNameAsString();
+ Result += "_IVARS;\n";
+
+ // insert the super class structure definition.
+ SourceLocation OnePastCurly =
+ LocStart.getLocWithOffset(cursor-startBuf+1);
+ InsertText(OnePastCurly, Result);
+ }
+ cursor++; // past '{'
+
+ // Now comment out any visibility specifiers.
+ while (cursor < endBuf) {
+ if (*cursor == '@') {
+ SourceLocation atLoc = LocStart.getLocWithOffset(cursor-startBuf);
+ // Skip whitespace.
+ for (++cursor; cursor[0] == ' ' || cursor[0] == '\t'; ++cursor)
+ /*scan*/;
+
+ // FIXME: presence of @public, etc. inside comment results in
+ // this transformation as well, which is still correct c-code.
+ if (!strncmp(cursor, "public", strlen("public")) ||
+ !strncmp(cursor, "private", strlen("private")) ||
+ !strncmp(cursor, "package", strlen("package")) ||
+ !strncmp(cursor, "protected", strlen("protected")))
+ InsertText(atLoc, "// ");
+ }
+ // FIXME: If there are cases where '<' is used in ivar declaration part
+ // of user code, then scan the ivar list and use needToScanForQualifiers
+ // for type checking.
+ else if (*cursor == '<') {
+ SourceLocation atLoc = LocStart.getLocWithOffset(cursor-startBuf);
+ InsertText(atLoc, "/* ");
+ cursor = strchr(cursor, '>');
+ cursor++;
+ atLoc = LocStart.getLocWithOffset(cursor-startBuf);
+ InsertText(atLoc, " */");
+ } else if (*cursor == '^') { // rewrite block specifier.
+ SourceLocation caretLoc = LocStart.getLocWithOffset(cursor-startBuf);
+ ReplaceText(caretLoc, 1, "*");
+ }
+ cursor++;
+ }
+ // Don't forget to add a ';'!!
+ InsertText(LocEnd.getLocWithOffset(1), ";");
+ } else { // we don't have any instance variables - insert super struct.
+ endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
+ Result += " {\n struct ";
+ Result += RCDecl->getNameAsString();
+ Result += "_IMPL ";
+ Result += RCDecl->getNameAsString();
+ Result += "_IVARS;\n};\n";
+ ReplaceText(LocStart, endBuf-startBuf, Result);
+ }
+ // Mark this struct as having been generated.
+ if (!ObjCSynthesizedStructs.insert(CDecl))
+ llvm_unreachable("struct already synthesize- SynthesizeObjCInternalStruct");
+}
+
+//===----------------------------------------------------------------------===//
+// Meta Data Emission
+//===----------------------------------------------------------------------===//
+
+
+/// RewriteImplementations - This routine rewrites all method implementations
+/// and emits meta-data.
+
+void RewriteObjC::RewriteImplementations() {
+ int ClsDefCount = ClassImplementation.size();
+ int CatDefCount = CategoryImplementation.size();
+
+ // Rewrite implemented methods
+ for (int i = 0; i < ClsDefCount; i++)
+ RewriteImplementationDecl(ClassImplementation[i]);
+
+ for (int i = 0; i < CatDefCount; i++)
+ RewriteImplementationDecl(CategoryImplementation[i]);
+}
+
+void RewriteObjC::RewriteByRefString(std::string &ResultStr,
+ const std::string &Name,
+ ValueDecl *VD, bool def) {
+ assert(BlockByRefDeclNo.count(VD) &&
+ "RewriteByRefString: ByRef decl missing");
+ if (def)
+ ResultStr += "struct ";
+ ResultStr += "__Block_byref_" + Name +
+ "_" + utostr(BlockByRefDeclNo[VD]) ;
+}
+
+static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
+ if (VarDecl *Var = dyn_cast<VarDecl>(VD))
+ return (Var->isFunctionOrMethodVarDecl() && !Var->hasLocalStorage());
+ return false;
+}
+
+std::string RewriteObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
+ StringRef funcName,
+ std::string Tag) {
+ const FunctionType *AFT = CE->getFunctionType();
+ QualType RT = AFT->getResultType();
+ std::string StructRef = "struct " + Tag;
+ std::string S = "static " + RT.getAsString(Context->getPrintingPolicy()) + " __" +
+ funcName.str() + "_" + "block_func_" + utostr(i);
+
+ BlockDecl *BD = CE->getBlockDecl();
+
+ if (isa<FunctionNoProtoType>(AFT)) {
+ // No user-supplied arguments. Still need to pass in a pointer to the
+ // block (to reference imported block decl refs).
+ S += "(" + StructRef + " *__cself)";
+ } else if (BD->param_empty()) {
+ S += "(" + StructRef + " *__cself)";
+ } else {
+ const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
+ assert(FT && "SynthesizeBlockFunc: No function proto");
+ S += '(';
+ // first add the implicit argument.
+ S += StructRef + " *__cself, ";
+ std::string ParamStr;
+ for (BlockDecl::param_iterator AI = BD->param_begin(),
+ E = BD->param_end(); AI != E; ++AI) {
+ if (AI != BD->param_begin()) S += ", ";
+ ParamStr = (*AI)->getNameAsString();
+ QualType QT = (*AI)->getType();
+ (void)convertBlockPointerToFunctionPointer(QT);
+ QT.getAsStringInternal(ParamStr, Context->getPrintingPolicy());
+ S += ParamStr;
+ }
+ if (FT->isVariadic()) {
+ if (!BD->param_empty()) S += ", ";
+ S += "...";
+ }
+ S += ')';
+ }
+ S += " {\n";
+
+ // Create local declarations to avoid rewriting all closure decl ref exprs.
+ // First, emit a declaration for all "by ref" decls.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ S += " ";
+ std::string Name = (*I)->getNameAsString();
+ std::string TypeString;
+ RewriteByRefString(TypeString, Name, (*I));
+ TypeString += " *";
+ Name = TypeString + Name;
+ S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
+ }
+ // Next, emit a declaration for all "by copy" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
+ E = BlockByCopyDecls.end(); I != E; ++I) {
+ S += " ";
+ // Handle nested closure invocation. For example:
+ //
+ // void (^myImportedClosure)(void);
+ // myImportedClosure = ^(void) { setGlobalInt(x + y); };
+ //
+ // void (^anotherClosure)(void);
+ // anotherClosure = ^(void) {
+ // myImportedClosure(); // import and invoke the closure
+ // };
+ //
+ if (isTopLevelBlockPointerType((*I)->getType())) {
+ RewriteBlockPointerTypeVariable(S, (*I));
+ S += " = (";
+ RewriteBlockPointerType(S, (*I)->getType());
+ S += ")";
+ S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
+ }
+ else {
+ std::string Name = (*I)->getNameAsString();
+ QualType QT = (*I)->getType();
+ if (HasLocalVariableExternalStorage(*I))
+ QT = Context->getPointerType(QT);
+ QT.getAsStringInternal(Name, Context->getPrintingPolicy());
+ S += Name + " = __cself->" +
+ (*I)->getNameAsString() + "; // bound by copy\n";
+ }
+ }
+ std::string RewrittenStr = RewrittenBlockExprs[CE];
+ const char *cstr = RewrittenStr.c_str();
+ while (*cstr++ != '{') ;
+ S += cstr;
+ S += "\n";
+ return S;
+}
+
+std::string RewriteObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
+ StringRef funcName,
+ std::string Tag) {
+ std::string StructRef = "struct " + Tag;
+ std::string S = "static void __";
+
+ S += funcName;
+ S += "_block_copy_" + utostr(i);
+ S += "(" + StructRef;
+ S += "*dst, " + StructRef;
+ S += "*src) {";
+ for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
+ E = ImportedBlockDecls.end(); I != E; ++I) {
+ ValueDecl *VD = (*I);
+ S += "_Block_object_assign((void*)&dst->";
+ S += (*I)->getNameAsString();
+ S += ", (void*)src->";
+ S += (*I)->getNameAsString();
+ if (BlockByRefDeclsPtrSet.count((*I)))
+ S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
+ else if (VD->getType()->isBlockPointerType())
+ S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
+ else
+ S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
+ }
+ S += "}\n";
+
+ S += "\nstatic void __";
+ S += funcName;
+ S += "_block_dispose_" + utostr(i);
+ S += "(" + StructRef;
+ S += "*src) {";
+ for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
+ E = ImportedBlockDecls.end(); I != E; ++I) {
+ ValueDecl *VD = (*I);
+ S += "_Block_object_dispose((void*)src->";
+ S += (*I)->getNameAsString();
+ if (BlockByRefDeclsPtrSet.count((*I)))
+ S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
+ else if (VD->getType()->isBlockPointerType())
+ S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
+ else
+ S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
+ }
+ S += "}\n";
+ return S;
+}
+
+std::string RewriteObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
+ std::string Desc) {
+ std::string S = "\nstruct " + Tag;
+ std::string Constructor = " " + Tag;
+
+ S += " {\n struct __block_impl impl;\n";
+ S += " struct " + Desc;
+ S += "* Desc;\n";
+
+ Constructor += "(void *fp, "; // Invoke function pointer.
+ Constructor += "struct " + Desc; // Descriptor pointer.
+ Constructor += " *desc";
+
+ if (BlockDeclRefs.size()) {
+ // Output all "by copy" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
+ E = BlockByCopyDecls.end(); I != E; ++I) {
+ S += " ";
+ std::string FieldName = (*I)->getNameAsString();
+ std::string ArgName = "_" + FieldName;
+ // Handle nested closure invocation. For example:
+ //
+ // void (^myImportedBlock)(void);
+ // myImportedBlock = ^(void) { setGlobalInt(x + y); };
+ //
+ // void (^anotherBlock)(void);
+ // anotherBlock = ^(void) {
+ // myImportedBlock(); // import and invoke the closure
+ // };
+ //
+ if (isTopLevelBlockPointerType((*I)->getType())) {
+ S += "struct __block_impl *";
+ Constructor += ", void *" + ArgName;
+ } else {
+ QualType QT = (*I)->getType();
+ if (HasLocalVariableExternalStorage(*I))
+ QT = Context->getPointerType(QT);
+ QT.getAsStringInternal(FieldName, Context->getPrintingPolicy());
+ QT.getAsStringInternal(ArgName, Context->getPrintingPolicy());
+ Constructor += ", " + ArgName;
+ }
+ S += FieldName + ";\n";
+ }
+ // Output all "by ref" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ S += " ";
+ std::string FieldName = (*I)->getNameAsString();
+ std::string ArgName = "_" + FieldName;
+ {
+ std::string TypeString;
+ RewriteByRefString(TypeString, FieldName, (*I));
+ TypeString += " *";
+ FieldName = TypeString + FieldName;
+ ArgName = TypeString + ArgName;
+ Constructor += ", " + ArgName;
+ }
+ S += FieldName + "; // by ref\n";
+ }
+ // Finish writing the constructor.
+ Constructor += ", int flags=0)";
+ // Initialize all "by copy" arguments.
+ bool firsTime = true;
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
+ E = BlockByCopyDecls.end(); I != E; ++I) {
+ std::string Name = (*I)->getNameAsString();
+ if (firsTime) {
+ Constructor += " : ";
+ firsTime = false;
+ }
+ else
+ Constructor += ", ";
+ if (isTopLevelBlockPointerType((*I)->getType()))
+ Constructor += Name + "((struct __block_impl *)_" + Name + ")";
+ else
+ Constructor += Name + "(_" + Name + ")";
+ }
+ // Initialize all "by ref" arguments.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ std::string Name = (*I)->getNameAsString();
+ if (firsTime) {
+ Constructor += " : ";
+ firsTime = false;
+ }
+ else
+ Constructor += ", ";
+ Constructor += Name + "(_" + Name + "->__forwarding)";
+ }
+
+ Constructor += " {\n";
+ if (GlobalVarDecl)
+ Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
+ else
+ Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
+ Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
+
+ Constructor += " Desc = desc;\n";
+ } else {
+ // Finish writing the constructor.
+ Constructor += ", int flags=0) {\n";
+ if (GlobalVarDecl)
+ Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
+ else
+ Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
+ Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
+ Constructor += " Desc = desc;\n";
+ }
+ Constructor += " ";
+ Constructor += "}\n";
+ S += Constructor;
+ S += "};\n";
+ return S;
+}
+
+std::string RewriteObjC::SynthesizeBlockDescriptor(std::string DescTag,
+ std::string ImplTag, int i,
+ StringRef FunName,
+ unsigned hasCopy) {
+ std::string S = "\nstatic struct " + DescTag;
+
+ S += " {\n unsigned long reserved;\n";
+ S += " unsigned long Block_size;\n";
+ if (hasCopy) {
+ S += " void (*copy)(struct ";
+ S += ImplTag; S += "*, struct ";
+ S += ImplTag; S += "*);\n";
+
+ S += " void (*dispose)(struct ";
+ S += ImplTag; S += "*);\n";
+ }
+ S += "} ";
+
+ S += DescTag + "_DATA = { 0, sizeof(struct ";
+ S += ImplTag + ")";
+ if (hasCopy) {
+ S += ", __" + FunName.str() + "_block_copy_" + utostr(i);
+ S += ", __" + FunName.str() + "_block_dispose_" + utostr(i);
+ }
+ S += "};\n";
+ return S;
+}
+
+void RewriteObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
+ StringRef FunName) {
+ // Insert declaration for the function in which block literal is used.
+ if (CurFunctionDeclToDeclareForBlock && !Blocks.empty())
+ RewriteBlockLiteralFunctionDecl(CurFunctionDeclToDeclareForBlock);
+ bool RewriteSC = (GlobalVarDecl &&
+ !Blocks.empty() &&
+ GlobalVarDecl->getStorageClass() == SC_Static &&
+ GlobalVarDecl->getType().getCVRQualifiers());
+ if (RewriteSC) {
+ std::string SC(" void __");
+ SC += GlobalVarDecl->getNameAsString();
+ SC += "() {}";
+ InsertText(FunLocStart, SC);
+ }
+
+ // Insert closures that were part of the function.
+ for (unsigned i = 0, count=0; i < Blocks.size(); i++) {
+ CollectBlockDeclRefInfo(Blocks[i]);
+ // Need to copy-in the inner copied-in variables not actually used in this
+ // block.
+ for (int j = 0; j < InnerDeclRefsCount[i]; j++) {
+ DeclRefExpr *Exp = InnerDeclRefs[count++];
+ ValueDecl *VD = Exp->getDecl();
+ BlockDeclRefs.push_back(Exp);
+ if (!VD->hasAttr<BlocksAttr>() && !BlockByCopyDeclsPtrSet.count(VD)) {
+ BlockByCopyDeclsPtrSet.insert(VD);
+ BlockByCopyDecls.push_back(VD);
+ }
+ if (VD->hasAttr<BlocksAttr>() && !BlockByRefDeclsPtrSet.count(VD)) {
+ BlockByRefDeclsPtrSet.insert(VD);
+ BlockByRefDecls.push_back(VD);
+ }
+ // imported objects in the inner blocks not used in the outer
+ // blocks must be copied/disposed in the outer block as well.
+ if (VD->hasAttr<BlocksAttr>() ||
+ VD->getType()->isObjCObjectPointerType() ||
+ VD->getType()->isBlockPointerType())
+ ImportedBlockDecls.insert(VD);
+ }
+
+ std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(i);
+ std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(i);
+
+ std::string CI = SynthesizeBlockImpl(Blocks[i], ImplTag, DescTag);
+
+ InsertText(FunLocStart, CI);
+
+ std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, ImplTag);
+
+ InsertText(FunLocStart, CF);
+
+ if (ImportedBlockDecls.size()) {
+ std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, ImplTag);
+ InsertText(FunLocStart, HF);
+ }
+ std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
+ ImportedBlockDecls.size() > 0);
+ InsertText(FunLocStart, BD);
+
+ BlockDeclRefs.clear();
+ BlockByRefDecls.clear();
+ BlockByRefDeclsPtrSet.clear();
+ BlockByCopyDecls.clear();
+ BlockByCopyDeclsPtrSet.clear();
+ ImportedBlockDecls.clear();
+ }
+ if (RewriteSC) {
+ // Must insert any 'const/volatile/static here. Since it has been
+ // removed as result of rewriting of block literals.
+ std::string SC;
+ if (GlobalVarDecl->getStorageClass() == SC_Static)
+ SC = "static ";
+ if (GlobalVarDecl->getType().isConstQualified())
+ SC += "const ";
+ if (GlobalVarDecl->getType().isVolatileQualified())
+ SC += "volatile ";
+ if (GlobalVarDecl->getType().isRestrictQualified())
+ SC += "restrict ";
+ InsertText(FunLocStart, SC);
+ }
+
+ Blocks.clear();
+ InnerDeclRefsCount.clear();
+ InnerDeclRefs.clear();
+ RewrittenBlockExprs.clear();
+}
+
+void RewriteObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
+ SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
+ StringRef FuncName = FD->getName();
+
+ SynthesizeBlockLiterals(FunLocStart, FuncName);
+}
+
+static void BuildUniqueMethodName(std::string &Name,
+ ObjCMethodDecl *MD) {
+ ObjCInterfaceDecl *IFace = MD->getClassInterface();
+ Name = IFace->getName();
+ Name += "__" + MD->getSelector().getAsString();
+ // Convert colons to underscores.
+ std::string::size_type loc = 0;
+ while ((loc = Name.find(":", loc)) != std::string::npos)
+ Name.replace(loc, 1, "_");
+}
+
+void RewriteObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
+ //fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
+ //SourceLocation FunLocStart = MD->getLocStart();
+ SourceLocation FunLocStart = MD->getLocStart();
+ std::string FuncName;
+ BuildUniqueMethodName(FuncName, MD);
+ SynthesizeBlockLiterals(FunLocStart, FuncName);
+}
+
+void RewriteObjC::GetBlockDeclRefExprs(Stmt *S) {
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI))
+ GetBlockDeclRefExprs(CBE->getBody());
+ else
+ GetBlockDeclRefExprs(*CI);
+ }
+ // Handle specific things.
+ if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
+ if (DRE->refersToEnclosingLocal()) {
+ // FIXME: Handle enums.
+ if (!isa<FunctionDecl>(DRE->getDecl()))
+ BlockDeclRefs.push_back(DRE);
+ if (HasLocalVariableExternalStorage(DRE->getDecl()))
+ BlockDeclRefs.push_back(DRE);
+ }
+ }
+
+ return;
+}
+
+void RewriteObjC::GetInnerBlockDeclRefExprs(Stmt *S,
+ SmallVector<DeclRefExpr *, 8> &InnerBlockDeclRefs,
+ llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts) {
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI)) {
+ InnerContexts.insert(cast<DeclContext>(CBE->getBlockDecl()));
+ GetInnerBlockDeclRefExprs(CBE->getBody(),
+ InnerBlockDeclRefs,
+ InnerContexts);
+ }
+ else
+ GetInnerBlockDeclRefExprs(*CI,
+ InnerBlockDeclRefs,
+ InnerContexts);
+
+ }
+ // Handle specific things.
+ if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
+ if (DRE->refersToEnclosingLocal()) {
+ if (!isa<FunctionDecl>(DRE->getDecl()) &&
+ !InnerContexts.count(DRE->getDecl()->getDeclContext()))
+ InnerBlockDeclRefs.push_back(DRE);
+ if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl()))
+ if (Var->isFunctionOrMethodVarDecl())
+ ImportedLocalExternalDecls.insert(Var);
+ }
+ }
+
+ return;
+}
+
+/// convertFunctionTypeOfBlocks - This routine converts a function type
+/// whose result type may be a block pointer or whose argument type(s)
+/// might be block pointers to an equivalent function type replacing
+/// all block pointers to function pointers.
+QualType RewriteObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
+ const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
+ // FTP will be null for closures that don't take arguments.
+ // Generate a funky cast.
+ SmallVector<QualType, 8> ArgTypes;
+ QualType Res = FT->getResultType();
+ bool HasBlockType = convertBlockPointerToFunctionPointer(Res);
+
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I && (I != E); ++I) {
+ QualType t = *I;
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ if (convertBlockPointerToFunctionPointer(t))
+ HasBlockType = true;
+ ArgTypes.push_back(t);
+ }
+ }
+ QualType FuncType;
+ // FIXME. Does this work if block takes no argument but has a return type
+ // which is of block type?
+ if (HasBlockType)
+ FuncType = getSimpleFunctionType(Res, &ArgTypes[0], ArgTypes.size());
+ else FuncType = QualType(FT, 0);
+ return FuncType;
+}
+
+Stmt *RewriteObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
+ // Navigate to relevant type information.
+ const BlockPointerType *CPT = 0;
+
+ if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BlockExp)) {
+ CPT = DRE->getType()->getAs<BlockPointerType>();
+ } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(BlockExp)) {
+ CPT = MExpr->getType()->getAs<BlockPointerType>();
+ }
+ else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(BlockExp)) {
+ return SynthesizeBlockCall(Exp, PRE->getSubExpr());
+ }
+ else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(BlockExp))
+ CPT = IEXPR->getType()->getAs<BlockPointerType>();
+ else if (const ConditionalOperator *CEXPR =
+ dyn_cast<ConditionalOperator>(BlockExp)) {
+ Expr *LHSExp = CEXPR->getLHS();
+ Stmt *LHSStmt = SynthesizeBlockCall(Exp, LHSExp);
+ Expr *RHSExp = CEXPR->getRHS();
+ Stmt *RHSStmt = SynthesizeBlockCall(Exp, RHSExp);
+ Expr *CONDExp = CEXPR->getCond();
+ ConditionalOperator *CondExpr =
+ new (Context) ConditionalOperator(CONDExp,
+ SourceLocation(), cast<Expr>(LHSStmt),
+ SourceLocation(), cast<Expr>(RHSStmt),
+ Exp->getType(), VK_RValue, OK_Ordinary);
+ return CondExpr;
+ } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(BlockExp)) {
+ CPT = IRE->getType()->getAs<BlockPointerType>();
+ } else if (const PseudoObjectExpr *POE
+ = dyn_cast<PseudoObjectExpr>(BlockExp)) {
+ CPT = POE->getType()->castAs<BlockPointerType>();
+ } else {
+ assert(1 && "RewriteBlockClass: Bad type");
+ }
+ assert(CPT && "RewriteBlockClass: Bad type");
+ const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
+ assert(FT && "RewriteBlockClass: Bad type");
+ const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
+ // FTP will be null for closures that don't take arguments.
+
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("__block_impl"));
+ QualType PtrBlock = Context->getPointerType(Context->getTagDeclType(RD));
+
+ // Generate a funky cast.
+ SmallVector<QualType, 8> ArgTypes;
+
+ // Push the block argument type.
+ ArgTypes.push_back(PtrBlock);
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I && (I != E); ++I) {
+ QualType t = *I;
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ if (!convertBlockPointerToFunctionPointer(t))
+ convertToUnqualifiedObjCType(t);
+ ArgTypes.push_back(t);
+ }
+ }
+ // Now do the pointer to function cast.
+ QualType PtrToFuncCastType
+ = getSimpleFunctionType(Exp->getType(), &ArgTypes[0], ArgTypes.size());
+
+ PtrToFuncCastType = Context->getPointerType(PtrToFuncCastType);
+
+ CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Context, PtrBlock,
+ CK_BitCast,
+ const_cast<Expr*>(BlockExp));
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
+ BlkCast);
+ //PE->dump();
+
+ FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
+ SourceLocation(),
+ &Context->Idents.get("FuncPtr"),
+ Context->VoidPtrTy, 0,
+ /*BitWidth=*/0, /*Mutable=*/true,
+ /*HasInit=*/false);
+ MemberExpr *ME = new (Context) MemberExpr(PE, true, FD, SourceLocation(),
+ FD->getType(), VK_LValue,
+ OK_Ordinary);
+
+
+ CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
+ CK_BitCast, ME);
+ PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
+
+ SmallVector<Expr*, 8> BlkExprs;
+ // Add the implicit argument.
+ BlkExprs.push_back(BlkCast);
+ // Add the user arguments.
+ for (CallExpr::arg_iterator I = Exp->arg_begin(),
+ E = Exp->arg_end(); I != E; ++I) {
+ BlkExprs.push_back(*I);
+ }
+ CallExpr *CE = new (Context) CallExpr(*Context, PE, &BlkExprs[0],
+ BlkExprs.size(),
+ Exp->getType(), VK_RValue,
+ SourceLocation());
+ return CE;
+}
+
+// We need to return the rewritten expression to handle cases where the
+// BlockDeclRefExpr is embedded in another expression being rewritten.
+// For example:
+//
+// int main() {
+// __block Foo *f;
+// __block int i;
+//
+// void (^myblock)() = ^() {
+// [f test]; // f is a BlockDeclRefExpr embedded in a message (which is being rewritten).
+// i = 77;
+// };
+//}
+Stmt *RewriteObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
+ // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
+ // for each DeclRefExp where BYREFVAR is name of the variable.
+ ValueDecl *VD = DeclRefExp->getDecl();
+ bool isArrow = DeclRefExp->refersToEnclosingLocal();
+
+ FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
+ SourceLocation(),
+ &Context->Idents.get("__forwarding"),
+ Context->VoidPtrTy, 0,
+ /*BitWidth=*/0, /*Mutable=*/true,
+ /*HasInit=*/false);
+ MemberExpr *ME = new (Context) MemberExpr(DeclRefExp, isArrow,
+ FD, SourceLocation(),
+ FD->getType(), VK_LValue,
+ OK_Ordinary);
+
+ StringRef Name = VD->getName();
+ FD = FieldDecl::Create(*Context, 0, SourceLocation(), SourceLocation(),
+ &Context->Idents.get(Name),
+ Context->VoidPtrTy, 0,
+ /*BitWidth=*/0, /*Mutable=*/true,
+ /*HasInit=*/false);
+ ME = new (Context) MemberExpr(ME, true, FD, SourceLocation(),
+ DeclRefExp->getType(), VK_LValue, OK_Ordinary);
+
+
+
+ // Need parens to enforce precedence.
+ ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
+ DeclRefExp->getExprLoc(),
+ ME);
+ ReplaceStmt(DeclRefExp, PE);
+ return PE;
+}
+
+// Rewrites the imported local variable V with external storage
+// (static, extern, etc.) as *V
+//
+Stmt *RewriteObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
+ ValueDecl *VD = DRE->getDecl();
+ if (VarDecl *Var = dyn_cast<VarDecl>(VD))
+ if (!ImportedLocalExternalDecls.count(Var))
+ return DRE;
+ Expr *Exp = new (Context) UnaryOperator(DRE, UO_Deref, DRE->getType(),
+ VK_LValue, OK_Ordinary,
+ DRE->getLocation());
+ // Need parens to enforce precedence.
+ ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
+ Exp);
+ ReplaceStmt(DRE, PE);
+ return PE;
+}
+
+void RewriteObjC::RewriteCastExpr(CStyleCastExpr *CE) {
+ SourceLocation LocStart = CE->getLParenLoc();
+ SourceLocation LocEnd = CE->getRParenLoc();
+
+ // Need to avoid trying to rewrite synthesized casts.
+ if (LocStart.isInvalid())
+ return;
+ // Need to avoid trying to rewrite casts contained in macros.
+ if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd))
+ return;
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ QualType QT = CE->getType();
+ const Type* TypePtr = QT->getAs<Type>();
+ if (isa<TypeOfExprType>(TypePtr)) {
+ const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
+ QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
+ std::string TypeAsString = "(";
+ RewriteBlockPointerType(TypeAsString, QT);
+ TypeAsString += ")";
+ ReplaceText(LocStart, endBuf-startBuf+1, TypeAsString);
+ return;
+ }
+ // advance the location to startArgList.
+ const char *argPtr = startBuf;
+
+ while (*argPtr++ && (argPtr < endBuf)) {
+ switch (*argPtr) {
+ case '^':
+ // Replace the '^' with '*'.
+ LocStart = LocStart.getLocWithOffset(argPtr-startBuf);
+ ReplaceText(LocStart, 1, "*");
+ break;
+ }
+ }
+ return;
+}
+
+void RewriteObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
+ SourceLocation DeclLoc = FD->getLocation();
+ unsigned parenCount = 0;
+
+ // We have 1 or more arguments that have closure pointers.
+ const char *startBuf = SM->getCharacterData(DeclLoc);
+ const char *startArgList = strchr(startBuf, '(');
+
+ assert((*startArgList == '(') && "Rewriter fuzzy parser confused");
+
+ parenCount++;
+ // advance the location to startArgList.
+ DeclLoc = DeclLoc.getLocWithOffset(startArgList-startBuf);
+ assert((DeclLoc.isValid()) && "Invalid DeclLoc");
+
+ const char *argPtr = startArgList;
+
+ while (*argPtr++ && parenCount) {
+ switch (*argPtr) {
+ case '^':
+ // Replace the '^' with '*'.
+ DeclLoc = DeclLoc.getLocWithOffset(argPtr-startArgList);
+ ReplaceText(DeclLoc, 1, "*");
+ break;
+ case '(':
+ parenCount++;
+ break;
+ case ')':
+ parenCount--;
+ break;
+ }
+ }
+ return;
+}
+
+bool RewriteObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
+ const FunctionProtoType *FTP;
+ const PointerType *PT = QT->getAs<PointerType>();
+ if (PT) {
+ FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
+ } else {
+ const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
+ assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
+ FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
+ }
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I != E; ++I)
+ if (isTopLevelBlockPointerType(*I))
+ return true;
+ }
+ return false;
+}
+
+bool RewriteObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
+ const FunctionProtoType *FTP;
+ const PointerType *PT = QT->getAs<PointerType>();
+ if (PT) {
+ FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
+ } else {
+ const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
+ assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
+ FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
+ }
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I != E; ++I) {
+ if ((*I)->isObjCQualifiedIdType())
+ return true;
+ if ((*I)->isObjCObjectPointerType() &&
+ (*I)->getPointeeType()->isObjCQualifiedInterfaceType())
+ return true;
+ }
+
+ }
+ return false;
+}
+
+void RewriteObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
+ const char *&RParen) {
+ const char *argPtr = strchr(Name, '(');
+ assert((*argPtr == '(') && "Rewriter fuzzy parser confused");
+
+ LParen = argPtr; // output the start.
+ argPtr++; // skip past the left paren.
+ unsigned parenCount = 1;
+
+ while (*argPtr && parenCount) {
+ switch (*argPtr) {
+ case '(': parenCount++; break;
+ case ')': parenCount--; break;
+ default: break;
+ }
+ if (parenCount) argPtr++;
+ }
+ assert((*argPtr == ')') && "Rewriter fuzzy parser confused");
+ RParen = argPtr; // output the end
+}
+
+void RewriteObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
+ if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
+ RewriteBlockPointerFunctionArgs(FD);
+ return;
+ }
+ // Handle Variables and Typedefs.
+ SourceLocation DeclLoc = ND->getLocation();
+ QualType DeclT;
+ if (VarDecl *VD = dyn_cast<VarDecl>(ND))
+ DeclT = VD->getType();
+ else if (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(ND))
+ DeclT = TDD->getUnderlyingType();
+ else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
+ DeclT = FD->getType();
+ else
+ llvm_unreachable("RewriteBlockPointerDecl(): Decl type not yet handled");
+
+ const char *startBuf = SM->getCharacterData(DeclLoc);
+ const char *endBuf = startBuf;
+ // scan backward (from the decl location) for the end of the previous decl.
+ while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart)
+ startBuf--;
+ SourceLocation Start = DeclLoc.getLocWithOffset(startBuf-endBuf);
+ std::string buf;
+ unsigned OrigLength=0;
+ // *startBuf != '^' if we are dealing with a pointer to function that
+ // may take block argument types (which will be handled below).
+ if (*startBuf == '^') {
+ // Replace the '^' with '*', computing a negative offset.
+ buf = '*';
+ startBuf++;
+ OrigLength++;
+ }
+ while (*startBuf != ')') {
+ buf += *startBuf;
+ startBuf++;
+ OrigLength++;
+ }
+ buf += ')';
+ OrigLength++;
+
+ if (PointerTypeTakesAnyBlockArguments(DeclT) ||
+ PointerTypeTakesAnyObjCQualifiedType(DeclT)) {
+ // Replace the '^' with '*' for arguments.
+ // Replace id<P> with id/*<>*/
+ DeclLoc = ND->getLocation();
+ startBuf = SM->getCharacterData(DeclLoc);
+ const char *argListBegin, *argListEnd;
+ GetExtentOfArgList(startBuf, argListBegin, argListEnd);
+ while (argListBegin < argListEnd) {
+ if (*argListBegin == '^')
+ buf += '*';
+ else if (*argListBegin == '<') {
+ buf += "/*";
+ buf += *argListBegin++;
+ OrigLength++;;
+ while (*argListBegin != '>') {
+ buf += *argListBegin++;
+ OrigLength++;
+ }
+ buf += *argListBegin;
+ buf += "*/";
+ }
+ else
+ buf += *argListBegin;
+ argListBegin++;
+ OrigLength++;
+ }
+ buf += ')';
+ OrigLength++;
+ }
+ ReplaceText(Start, OrigLength, buf);
+
+ return;
+}
+
+
+/// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
+/// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
+/// struct Block_byref_id_object *src) {
+/// _Block_object_assign (&_dest->object, _src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
+/// [|BLOCK_FIELD_IS_WEAK]) // object
+/// _Block_object_assign(&_dest->object, _src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
+/// [|BLOCK_FIELD_IS_WEAK]) // block
+/// }
+/// And:
+/// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
+/// _Block_object_dispose(_src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
+/// [|BLOCK_FIELD_IS_WEAK]) // object
+/// _Block_object_dispose(_src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
+/// [|BLOCK_FIELD_IS_WEAK]) // block
+/// }
+
+std::string RewriteObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
+ int flag) {
+ std::string S;
+ if (CopyDestroyCache.count(flag))
+ return S;
+ CopyDestroyCache.insert(flag);
+ S = "static void __Block_byref_id_object_copy_";
+ S += utostr(flag);
+ S += "(void *dst, void *src) {\n";
+
+ // offset into the object pointer is computed as:
+ // void * + void* + int + int + void* + void *
+ unsigned IntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
+ unsigned VoidPtrSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
+
+ unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
+ S += " _Block_object_assign((char*)dst + ";
+ S += utostr(offset);
+ S += ", *(void * *) ((char*)src + ";
+ S += utostr(offset);
+ S += "), ";
+ S += utostr(flag);
+ S += ");\n}\n";
+
+ S += "static void __Block_byref_id_object_dispose_";
+ S += utostr(flag);
+ S += "(void *src) {\n";
+ S += " _Block_object_dispose(*(void * *) ((char*)src + ";
+ S += utostr(offset);
+ S += "), ";
+ S += utostr(flag);
+ S += ");\n}\n";
+ return S;
+}
+
+/// RewriteByRefVar - For each __block typex ND variable this routine transforms
+/// the declaration into:
+/// struct __Block_byref_ND {
+/// void *__isa; // NULL for everything except __weak pointers
+/// struct __Block_byref_ND *__forwarding;
+/// int32_t __flags;
+/// int32_t __size;
+/// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
+/// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
+/// typex ND;
+/// };
+///
+/// It then replaces declaration of ND variable with:
+/// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
+/// __size=sizeof(struct __Block_byref_ND),
+/// ND=initializer-if-any};
+///
+///
+void RewriteObjC::RewriteByRefVar(VarDecl *ND) {
+ // Insert declaration for the function in which block literal is
+ // used.
+ if (CurFunctionDeclToDeclareForBlock)
+ RewriteBlockLiteralFunctionDecl(CurFunctionDeclToDeclareForBlock);
+ int flag = 0;
+ int isa = 0;
+ SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
+ if (DeclLoc.isInvalid())
+ // If type location is missing, it is because of missing type (a warning).
+ // Use variable's location which is good for this case.
+ DeclLoc = ND->getLocation();
+ const char *startBuf = SM->getCharacterData(DeclLoc);
+ SourceLocation X = ND->getLocEnd();
+ X = SM->getExpansionLoc(X);
+ const char *endBuf = SM->getCharacterData(X);
+ std::string Name(ND->getNameAsString());
+ std::string ByrefType;
+ RewriteByRefString(ByrefType, Name, ND, true);
+ ByrefType += " {\n";
+ ByrefType += " void *__isa;\n";
+ RewriteByRefString(ByrefType, Name, ND);
+ ByrefType += " *__forwarding;\n";
+ ByrefType += " int __flags;\n";
+ ByrefType += " int __size;\n";
+ // Add void *__Block_byref_id_object_copy;
+ // void *__Block_byref_id_object_dispose; if needed.
+ QualType Ty = ND->getType();
+ bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty);
+ if (HasCopyAndDispose) {
+ ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
+ ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
+ }
+
+ QualType T = Ty;
+ (void)convertBlockPointerToFunctionPointer(T);
+ T.getAsStringInternal(Name, Context->getPrintingPolicy());
+
+ ByrefType += " " + Name + ";\n";
+ ByrefType += "};\n";
+ // Insert this type in global scope. It is needed by helper function.
+ SourceLocation FunLocStart;
+ if (CurFunctionDef)
+ FunLocStart = CurFunctionDef->getTypeSpecStartLoc();
+ else {
+ assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null");
+ FunLocStart = CurMethodDef->getLocStart();
+ }
+ InsertText(FunLocStart, ByrefType);
+ if (Ty.isObjCGCWeak()) {
+ flag |= BLOCK_FIELD_IS_WEAK;
+ isa = 1;
+ }
+
+ if (HasCopyAndDispose) {
+ flag = BLOCK_BYREF_CALLER;
+ QualType Ty = ND->getType();
+ // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
+ if (Ty->isBlockPointerType())
+ flag |= BLOCK_FIELD_IS_BLOCK;
+ else
+ flag |= BLOCK_FIELD_IS_OBJECT;
+ std::string HF = SynthesizeByrefCopyDestroyHelper(ND, flag);
+ if (!HF.empty())
+ InsertText(FunLocStart, HF);
+ }
+
+ // struct __Block_byref_ND ND =
+ // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
+ // initializer-if-any};
+ bool hasInit = (ND->getInit() != 0);
+ unsigned flags = 0;
+ if (HasCopyAndDispose)
+ flags |= BLOCK_HAS_COPY_DISPOSE;
+ Name = ND->getNameAsString();
+ ByrefType.clear();
+ RewriteByRefString(ByrefType, Name, ND);
+ std::string ForwardingCastType("(");
+ ForwardingCastType += ByrefType + " *)";
+ if (!hasInit) {
+ ByrefType += " " + Name + " = {(void*)";
+ ByrefType += utostr(isa);
+ ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
+ ByrefType += utostr(flags);
+ ByrefType += ", ";
+ ByrefType += "sizeof(";
+ RewriteByRefString(ByrefType, Name, ND);
+ ByrefType += ")";
+ if (HasCopyAndDispose) {
+ ByrefType += ", __Block_byref_id_object_copy_";
+ ByrefType += utostr(flag);
+ ByrefType += ", __Block_byref_id_object_dispose_";
+ ByrefType += utostr(flag);
+ }
+ ByrefType += "};\n";
+ unsigned nameSize = Name.size();
+ // for block or function pointer declaration. Name is aleady
+ // part of the declaration.
+ if (Ty->isBlockPointerType() || Ty->isFunctionPointerType())
+ nameSize = 1;
+ ReplaceText(DeclLoc, endBuf-startBuf+nameSize, ByrefType);
+ }
+ else {
+ SourceLocation startLoc;
+ Expr *E = ND->getInit();
+ if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
+ startLoc = ECE->getLParenLoc();
+ else
+ startLoc = E->getLocStart();
+ startLoc = SM->getExpansionLoc(startLoc);
+ endBuf = SM->getCharacterData(startLoc);
+ ByrefType += " " + Name;
+ ByrefType += " = {(void*)";
+ ByrefType += utostr(isa);
+ ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
+ ByrefType += utostr(flags);
+ ByrefType += ", ";
+ ByrefType += "sizeof(";
+ RewriteByRefString(ByrefType, Name, ND);
+ ByrefType += "), ";
+ if (HasCopyAndDispose) {
+ ByrefType += "__Block_byref_id_object_copy_";
+ ByrefType += utostr(flag);
+ ByrefType += ", __Block_byref_id_object_dispose_";
+ ByrefType += utostr(flag);
+ ByrefType += ", ";
+ }
+ ReplaceText(DeclLoc, endBuf-startBuf, ByrefType);
+
+ // Complete the newly synthesized compound expression by inserting a right
+ // curly brace before the end of the declaration.
+ // FIXME: This approach avoids rewriting the initializer expression. It
+ // also assumes there is only one declarator. For example, the following
+ // isn't currently supported by this routine (in general):
+ //
+ // double __block BYREFVAR = 1.34, BYREFVAR2 = 1.37;
+ //
+ const char *startInitializerBuf = SM->getCharacterData(startLoc);
+ const char *semiBuf = strchr(startInitializerBuf, ';');
+ assert((*semiBuf == ';') && "RewriteByRefVar: can't find ';'");
+ SourceLocation semiLoc =
+ startLoc.getLocWithOffset(semiBuf-startInitializerBuf);
+
+ InsertText(semiLoc, "}");
+ }
+ return;
+}
+
+void RewriteObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
+ // Add initializers for any closure decl refs.
+ GetBlockDeclRefExprs(Exp->getBody());
+ if (BlockDeclRefs.size()) {
+ // Unique all "by copy" declarations.
+ for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
+ if (!BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
+ if (!BlockByCopyDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
+ BlockByCopyDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
+ BlockByCopyDecls.push_back(BlockDeclRefs[i]->getDecl());
+ }
+ }
+ // Unique all "by ref" declarations.
+ for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
+ if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
+ if (!BlockByRefDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
+ BlockByRefDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
+ BlockByRefDecls.push_back(BlockDeclRefs[i]->getDecl());
+ }
+ }
+ // Find any imported blocks...they will need special attention.
+ for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
+ if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
+ BlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
+ BlockDeclRefs[i]->getType()->isBlockPointerType())
+ ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl());
+ }
+}
+
+FunctionDecl *RewriteObjC::SynthBlockInitFunctionDecl(StringRef name) {
+ IdentifierInfo *ID = &Context->Idents.get(name);
+ QualType FType = Context->getFunctionNoProtoType(Context->VoidPtrTy);
+ return FunctionDecl::Create(*Context, TUDecl, SourceLocation(),
+ SourceLocation(), ID, FType, 0, SC_Extern,
+ SC_None, false, false);
+}
+
+Stmt *RewriteObjC::SynthBlockInitExpr(BlockExpr *Exp,
+ const SmallVector<DeclRefExpr *, 8> &InnerBlockDeclRefs) {
+ const BlockDecl *block = Exp->getBlockDecl();
+ Blocks.push_back(Exp);
+
+ CollectBlockDeclRefInfo(Exp);
+
+ // Add inner imported variables now used in current block.
+ int countOfInnerDecls = 0;
+ if (!InnerBlockDeclRefs.empty()) {
+ for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++) {
+ DeclRefExpr *Exp = InnerBlockDeclRefs[i];
+ ValueDecl *VD = Exp->getDecl();
+ if (!VD->hasAttr<BlocksAttr>() && !BlockByCopyDeclsPtrSet.count(VD)) {
+ // We need to save the copied-in variables in nested
+ // blocks because it is needed at the end for some of the API generations.
+ // See SynthesizeBlockLiterals routine.
+ InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
+ BlockDeclRefs.push_back(Exp);
+ BlockByCopyDeclsPtrSet.insert(VD);
+ BlockByCopyDecls.push_back(VD);
+ }
+ if (VD->hasAttr<BlocksAttr>() && !BlockByRefDeclsPtrSet.count(VD)) {
+ InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
+ BlockDeclRefs.push_back(Exp);
+ BlockByRefDeclsPtrSet.insert(VD);
+ BlockByRefDecls.push_back(VD);
+ }
+ }
+ // Find any imported blocks...they will need special attention.
+ for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++)
+ if (InnerBlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
+ InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
+ InnerBlockDeclRefs[i]->getType()->isBlockPointerType())
+ ImportedBlockDecls.insert(InnerBlockDeclRefs[i]->getDecl());
+ }
+ InnerDeclRefsCount.push_back(countOfInnerDecls);
+
+ std::string FuncName;
+
+ if (CurFunctionDef)
+ FuncName = CurFunctionDef->getNameAsString();
+ else if (CurMethodDef)
+ BuildUniqueMethodName(FuncName, CurMethodDef);
+ else if (GlobalVarDecl)
+ FuncName = std::string(GlobalVarDecl->getNameAsString());
+
+ std::string BlockNumber = utostr(Blocks.size()-1);
+
+ std::string Tag = "__" + FuncName + "_block_impl_" + BlockNumber;
+ std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
+
+ // Get a pointer to the function type so we can cast appropriately.
+ QualType BFT = convertFunctionTypeOfBlocks(Exp->getFunctionType());
+ QualType FType = Context->getPointerType(BFT);
+
+ FunctionDecl *FD;
+ Expr *NewRep;
+
+ // Simulate a contructor call...
+ FD = SynthBlockInitFunctionDecl(Tag);
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(FD, false, FType, VK_RValue,
+ SourceLocation());
+
+ SmallVector<Expr*, 4> InitExprs;
+
+ // Initialize the block function.
+ FD = SynthBlockInitFunctionDecl(Func);
+ DeclRefExpr *Arg = new (Context) DeclRefExpr(FD, false, FD->getType(),
+ VK_LValue, SourceLocation());
+ CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
+ CK_BitCast, Arg);
+ InitExprs.push_back(castExpr);
+
+ // Initialize the block descriptor.
+ std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
+
+ VarDecl *NewVD = VarDecl::Create(*Context, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get(DescData.c_str()),
+ Context->VoidPtrTy, 0,
+ SC_Static, SC_None);
+ UnaryOperator *DescRefExpr =
+ new (Context) UnaryOperator(new (Context) DeclRefExpr(NewVD, false,
+ Context->VoidPtrTy,
+ VK_LValue,
+ SourceLocation()),
+ UO_AddrOf,
+ Context->getPointerType(Context->VoidPtrTy),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ InitExprs.push_back(DescRefExpr);
+
+ // Add initializers for any closure decl refs.
+ if (BlockDeclRefs.size()) {
+ Expr *Exp;
+ // Output all "by copy" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
+ E = BlockByCopyDecls.end(); I != E; ++I) {
+ if (isObjCType((*I)->getType())) {
+ // FIXME: Conform to ABI ([[obj retain] autorelease]).
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Exp = new (Context) DeclRefExpr(FD, false, FD->getType(), VK_LValue,
+ SourceLocation());
+ if (HasLocalVariableExternalStorage(*I)) {
+ QualType QT = (*I)->getType();
+ QT = Context->getPointerType(QT);
+ Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
+ OK_Ordinary, SourceLocation());
+ }
+ } else if (isTopLevelBlockPointerType((*I)->getType())) {
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Arg = new (Context) DeclRefExpr(FD, false, FD->getType(), VK_LValue,
+ SourceLocation());
+ Exp = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
+ CK_BitCast, Arg);
+ } else {
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Exp = new (Context) DeclRefExpr(FD, false, FD->getType(), VK_LValue,
+ SourceLocation());
+ if (HasLocalVariableExternalStorage(*I)) {
+ QualType QT = (*I)->getType();
+ QT = Context->getPointerType(QT);
+ Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
+ OK_Ordinary, SourceLocation());
+ }
+
+ }
+ InitExprs.push_back(Exp);
+ }
+ // Output all "by ref" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ ValueDecl *ND = (*I);
+ std::string Name(ND->getNameAsString());
+ std::string RecName;
+ RewriteByRefString(RecName, Name, ND, true);
+ IdentifierInfo *II = &Context->Idents.get(RecName.c_str()
+ + sizeof("struct"));
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ II);
+ assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl");
+ QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
+
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Exp = new (Context) DeclRefExpr(FD, false, FD->getType(), VK_LValue,
+ SourceLocation());
+ bool isNestedCapturedVar = false;
+ if (block)
+ for (BlockDecl::capture_const_iterator ci = block->capture_begin(),
+ ce = block->capture_end(); ci != ce; ++ci) {
+ const VarDecl *variable = ci->getVariable();
+ if (variable == ND && ci->isNested()) {
+ assert (ci->isByRef() &&
+ "SynthBlockInitExpr - captured block variable is not byref");
+ isNestedCapturedVar = true;
+ break;
+ }
+ }
+ // captured nested byref variable has its address passed. Do not take
+ // its address again.
+ if (!isNestedCapturedVar)
+ Exp = new (Context) UnaryOperator(Exp, UO_AddrOf,
+ Context->getPointerType(Exp->getType()),
+ VK_RValue, OK_Ordinary, SourceLocation());
+ Exp = NoTypeInfoCStyleCastExpr(Context, castT, CK_BitCast, Exp);
+ InitExprs.push_back(Exp);
+ }
+ }
+ if (ImportedBlockDecls.size()) {
+ // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
+ int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
+ unsigned IntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
+ Expr *FlagExp = IntegerLiteral::Create(*Context, llvm::APInt(IntSize, flag),
+ Context->IntTy, SourceLocation());
+ InitExprs.push_back(FlagExp);
+ }
+ NewRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0], InitExprs.size(),
+ FType, VK_LValue, SourceLocation());
+ NewRep = new (Context) UnaryOperator(NewRep, UO_AddrOf,
+ Context->getPointerType(NewRep->getType()),
+ VK_RValue, OK_Ordinary, SourceLocation());
+ NewRep = NoTypeInfoCStyleCastExpr(Context, FType, CK_BitCast,
+ NewRep);
+ BlockDeclRefs.clear();
+ BlockByRefDecls.clear();
+ BlockByRefDeclsPtrSet.clear();
+ BlockByCopyDecls.clear();
+ BlockByCopyDeclsPtrSet.clear();
+ ImportedBlockDecls.clear();
+ return NewRep;
+}
+
+bool RewriteObjC::IsDeclStmtInForeachHeader(DeclStmt *DS) {
+ if (const ObjCForCollectionStmt * CS =
+ dyn_cast<ObjCForCollectionStmt>(Stmts.back()))
+ return CS->getElement() == DS;
+ return false;
+}
+
+//===----------------------------------------------------------------------===//
+// Function Body / Expression rewriting
+//===----------------------------------------------------------------------===//
+
+Stmt *RewriteObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
+ if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
+ isa<DoStmt>(S) || isa<ForStmt>(S))
+ Stmts.push_back(S);
+ else if (isa<ObjCForCollectionStmt>(S)) {
+ Stmts.push_back(S);
+ ObjCBcLabelNo.push_back(++BcLabelCount);
+ }
+
+ // Pseudo-object operations and ivar references need special
+ // treatment because we're going to recursively rewrite them.
+ if (PseudoObjectExpr *PseudoOp = dyn_cast<PseudoObjectExpr>(S)) {
+ if (isa<BinaryOperator>(PseudoOp->getSyntacticForm())) {
+ return RewritePropertyOrImplicitSetter(PseudoOp);
+ } else {
+ return RewritePropertyOrImplicitGetter(PseudoOp);
+ }
+ } else if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(S)) {
+ return RewriteObjCIvarRefExpr(IvarRefExpr);
+ }
+
+ SourceRange OrigStmtRange = S->getSourceRange();
+
+ // Perform a bottom up rewrite of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ Stmt *childStmt = (*CI);
+ Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(childStmt);
+ if (newStmt) {
+ *CI = newStmt;
+ }
+ }
+
+ if (BlockExpr *BE = dyn_cast<BlockExpr>(S)) {
+ SmallVector<DeclRefExpr *, 8> InnerBlockDeclRefs;
+ llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
+ InnerContexts.insert(BE->getBlockDecl());
+ ImportedLocalExternalDecls.clear();
+ GetInnerBlockDeclRefExprs(BE->getBody(),
+ InnerBlockDeclRefs, InnerContexts);
+ // Rewrite the block body in place.
+ Stmt *SaveCurrentBody = CurrentBody;
+ CurrentBody = BE->getBody();
+ PropParentMap = 0;
+ // block literal on rhs of a property-dot-sytax assignment
+ // must be replaced by its synthesize ast so getRewrittenText
+ // works as expected. In this case, what actually ends up on RHS
+ // is the blockTranscribed which is the helper function for the
+ // block literal; as in: self.c = ^() {[ace ARR];};
+ bool saveDisableReplaceStmt = DisableReplaceStmt;
+ DisableReplaceStmt = false;
+ RewriteFunctionBodyOrGlobalInitializer(BE->getBody());
+ DisableReplaceStmt = saveDisableReplaceStmt;
+ CurrentBody = SaveCurrentBody;
+ PropParentMap = 0;
+ ImportedLocalExternalDecls.clear();
+ // Now we snarf the rewritten text and stash it away for later use.
+ std::string Str = Rewrite.getRewrittenText(BE->getSourceRange());
+ RewrittenBlockExprs[BE] = Str;
+
+ Stmt *blockTranscribed = SynthBlockInitExpr(BE, InnerBlockDeclRefs);
+
+ //blockTranscribed->dump();
+ ReplaceStmt(S, blockTranscribed);
+ return blockTranscribed;
+ }
+ // Handle specific things.
+ if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(S))
+ return RewriteAtEncode(AtEncode);
+
+ if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(S))
+ return RewriteAtSelector(AtSelector);
+
+ if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(S))
+ return RewriteObjCStringLiteral(AtString);
+
+ if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(S)) {
+#if 0
+ // Before we rewrite it, put the original message expression in a comment.
+ SourceLocation startLoc = MessExpr->getLocStart();
+ SourceLocation endLoc = MessExpr->getLocEnd();
+
+ const char *startBuf = SM->getCharacterData(startLoc);
+ const char *endBuf = SM->getCharacterData(endLoc);
+
+ std::string messString;
+ messString += "// ";
+ messString.append(startBuf, endBuf-startBuf+1);
+ messString += "\n";
+
+ // FIXME: Missing definition of
+ // InsertText(clang::SourceLocation, char const*, unsigned int).
+ // InsertText(startLoc, messString.c_str(), messString.size());
+ // Tried this, but it didn't work either...
+ // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
+#endif
+ return RewriteMessageExpr(MessExpr);
+ }
+
+ if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(S))
+ return RewriteObjCTryStmt(StmtTry);
+
+ if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(S))
+ return RewriteObjCSynchronizedStmt(StmtTry);
+
+ if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(S))
+ return RewriteObjCThrowStmt(StmtThrow);
+
+ if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(S))
+ return RewriteObjCProtocolExpr(ProtocolExp);
+
+ if (ObjCForCollectionStmt *StmtForCollection =
+ dyn_cast<ObjCForCollectionStmt>(S))
+ return RewriteObjCForCollectionStmt(StmtForCollection,
+ OrigStmtRange.getEnd());
+ if (BreakStmt *StmtBreakStmt =
+ dyn_cast<BreakStmt>(S))
+ return RewriteBreakStmt(StmtBreakStmt);
+ if (ContinueStmt *StmtContinueStmt =
+ dyn_cast<ContinueStmt>(S))
+ return RewriteContinueStmt(StmtContinueStmt);
+
+ // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
+ // and cast exprs.
+ if (DeclStmt *DS = dyn_cast<DeclStmt>(S)) {
+ // FIXME: What we're doing here is modifying the type-specifier that
+ // precedes the first Decl. In the future the DeclGroup should have
+ // a separate type-specifier that we can rewrite.
+ // NOTE: We need to avoid rewriting the DeclStmt if it is within
+ // the context of an ObjCForCollectionStmt. For example:
+ // NSArray *someArray;
+ // for (id <FooProtocol> index in someArray) ;
+ // This is because RewriteObjCForCollectionStmt() does textual rewriting
+ // and it depends on the original text locations/positions.
+ if (Stmts.empty() || !IsDeclStmtInForeachHeader(DS))
+ RewriteObjCQualifiedInterfaceTypes(*DS->decl_begin());
+
+ // Blocks rewrite rules.
+ for (DeclStmt::decl_iterator DI = DS->decl_begin(), DE = DS->decl_end();
+ DI != DE; ++DI) {
+ Decl *SD = *DI;
+ if (ValueDecl *ND = dyn_cast<ValueDecl>(SD)) {
+ if (isTopLevelBlockPointerType(ND->getType()))
+ RewriteBlockPointerDecl(ND);
+ else if (ND->getType()->isFunctionPointerType())
+ CheckFunctionPointerDecl(ND->getType(), ND);
+ if (VarDecl *VD = dyn_cast<VarDecl>(SD)) {
+ if (VD->hasAttr<BlocksAttr>()) {
+ static unsigned uniqueByrefDeclCount = 0;
+ assert(!BlockByRefDeclNo.count(ND) &&
+ "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl");
+ BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
+ RewriteByRefVar(VD);
+ }
+ else
+ RewriteTypeOfDecl(VD);
+ }
+ }
+ if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(SD)) {
+ if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
+ RewriteBlockPointerDecl(TD);
+ else if (TD->getUnderlyingType()->isFunctionPointerType())
+ CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
+ }
+ }
+ }
+
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S))
+ RewriteObjCQualifiedInterfaceTypes(CE);
+
+ if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
+ isa<DoStmt>(S) || isa<ForStmt>(S)) {
+ assert(!Stmts.empty() && "Statement stack is empty");
+ assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||
+ isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))
+ && "Statement stack mismatch");
+ Stmts.pop_back();
+ }
+ // Handle blocks rewriting.
+ if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
+ ValueDecl *VD = DRE->getDecl();
+ if (VD->hasAttr<BlocksAttr>())
+ return RewriteBlockDeclRefExpr(DRE);
+ if (HasLocalVariableExternalStorage(VD))
+ return RewriteLocalVariableExternalStorage(DRE);
+ }
+
+ if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
+ if (CE->getCallee()->getType()->isBlockPointerType()) {
+ Stmt *BlockCall = SynthesizeBlockCall(CE, CE->getCallee());
+ ReplaceStmt(S, BlockCall);
+ return BlockCall;
+ }
+ }
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S)) {
+ RewriteCastExpr(CE);
+ }
+#if 0
+ if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
+ CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
+ ICE->getSubExpr(),
+ SourceLocation());
+ // Get the new text.
+ std::string SStr;
+ llvm::raw_string_ostream Buf(SStr);
+ Replacement->printPretty(Buf, *Context);
+ const std::string &Str = Buf.str();
+
+ printf("CAST = %s\n", &Str[0]);
+ InsertText(ICE->getSubExpr()->getLocStart(), &Str[0], Str.size());
+ delete S;
+ return Replacement;
+ }
+#endif
+ // Return this stmt unmodified.
+ return S;
+}
+
+void RewriteObjC::RewriteRecordBody(RecordDecl *RD) {
+ for (RecordDecl::field_iterator i = RD->field_begin(),
+ e = RD->field_end(); i != e; ++i) {
+ FieldDecl *FD = *i;
+ if (isTopLevelBlockPointerType(FD->getType()))
+ RewriteBlockPointerDecl(FD);
+ if (FD->getType()->isObjCQualifiedIdType() ||
+ FD->getType()->isObjCQualifiedInterfaceType())
+ RewriteObjCQualifiedInterfaceTypes(FD);
+ }
+}
+
+/// HandleDeclInMainFile - This is called for each top-level decl defined in the
+/// main file of the input.
+void RewriteObjC::HandleDeclInMainFile(Decl *D) {
+ switch (D->getKind()) {
+ case Decl::Function: {
+ FunctionDecl *FD = cast<FunctionDecl>(D);
+ if (FD->isOverloadedOperator())
+ return;
+
+ // Since function prototypes don't have ParmDecl's, we check the function
+ // prototype. This enables us to rewrite function declarations and
+ // definitions using the same code.
+ RewriteBlocksInFunctionProtoType(FD->getType(), FD);
+
+ if (!FD->isThisDeclarationADefinition())
+ break;
+
+ // FIXME: If this should support Obj-C++, support CXXTryStmt
+ if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(FD->getBody())) {
+ CurFunctionDef = FD;
+ CurFunctionDeclToDeclareForBlock = FD;
+ CurrentBody = Body;
+ Body =
+ cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
+ FD->setBody(Body);
+ CurrentBody = 0;
+ if (PropParentMap) {
+ delete PropParentMap;
+ PropParentMap = 0;
+ }
+ // This synthesizes and inserts the block "impl" struct, invoke function,
+ // and any copy/dispose helper functions.
+ InsertBlockLiteralsWithinFunction(FD);
+ CurFunctionDef = 0;
+ CurFunctionDeclToDeclareForBlock = 0;
+ }
+ break;
+ }
+ case Decl::ObjCMethod: {
+ ObjCMethodDecl *MD = cast<ObjCMethodDecl>(D);
+ if (CompoundStmt *Body = MD->getCompoundBody()) {
+ CurMethodDef = MD;
+ CurrentBody = Body;
+ Body =
+ cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
+ MD->setBody(Body);
+ CurrentBody = 0;
+ if (PropParentMap) {
+ delete PropParentMap;
+ PropParentMap = 0;
+ }
+ InsertBlockLiteralsWithinMethod(MD);
+ CurMethodDef = 0;
+ }
+ break;
+ }
+ case Decl::ObjCImplementation: {
+ ObjCImplementationDecl *CI = cast<ObjCImplementationDecl>(D);
+ ClassImplementation.push_back(CI);
+ break;
+ }
+ case Decl::ObjCCategoryImpl: {
+ ObjCCategoryImplDecl *CI = cast<ObjCCategoryImplDecl>(D);
+ CategoryImplementation.push_back(CI);
+ break;
+ }
+ case Decl::Var: {
+ VarDecl *VD = cast<VarDecl>(D);
+ RewriteObjCQualifiedInterfaceTypes(VD);
+ if (isTopLevelBlockPointerType(VD->getType()))
+ RewriteBlockPointerDecl(VD);
+ else if (VD->getType()->isFunctionPointerType()) {
+ CheckFunctionPointerDecl(VD->getType(), VD);
+ if (VD->getInit()) {
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
+ RewriteCastExpr(CE);
+ }
+ }
+ } else if (VD->getType()->isRecordType()) {
+ RecordDecl *RD = VD->getType()->getAs<RecordType>()->getDecl();
+ if (RD->isCompleteDefinition())
+ RewriteRecordBody(RD);
+ }
+ if (VD->getInit()) {
+ GlobalVarDecl = VD;
+ CurrentBody = VD->getInit();
+ RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
+ CurrentBody = 0;
+ if (PropParentMap) {
+ delete PropParentMap;
+ PropParentMap = 0;
+ }
+ SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(), VD->getName());
+ GlobalVarDecl = 0;
+
+ // This is needed for blocks.
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
+ RewriteCastExpr(CE);
+ }
+ }
+ break;
+ }
+ case Decl::TypeAlias:
+ case Decl::Typedef: {
+ if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
+ if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
+ RewriteBlockPointerDecl(TD);
+ else if (TD->getUnderlyingType()->isFunctionPointerType())
+ CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
+ }
+ break;
+ }
+ case Decl::CXXRecord:
+ case Decl::Record: {
+ RecordDecl *RD = cast<RecordDecl>(D);
+ if (RD->isCompleteDefinition())
+ RewriteRecordBody(RD);
+ break;
+ }
+ default:
+ break;
+ }
+ // Nothing yet.
+}
+
+void RewriteObjC::HandleTranslationUnit(ASTContext &C) {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ RewriteInclude();
+
+ // Here's a great place to add any extra declarations that may be needed.
+ // Write out meta data for each @protocol(<expr>).
+ for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
+ E = ProtocolExprDecls.end(); I != E; ++I)
+ RewriteObjCProtocolMetaData(*I, "", "", Preamble);
+
+ InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
+ if (ClassImplementation.size() || CategoryImplementation.size())
+ RewriteImplementations();
+
+ // Get the buffer corresponding to MainFileID. If we haven't changed it, then
+ // we are done.
+ if (const RewriteBuffer *RewriteBuf =
+ Rewrite.getRewriteBufferFor(MainFileID)) {
+ //printf("Changed:\n");
+ *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
+ } else {
+ llvm::errs() << "No changes\n";
+ }
+
+ if (ClassImplementation.size() || CategoryImplementation.size() ||
+ ProtocolExprDecls.size()) {
+ // Rewrite Objective-c meta data*
+ std::string ResultStr;
+ RewriteMetaDataIntoBuffer(ResultStr);
+ // Emit metadata.
+ *OutFile << ResultStr;
+ }
+ OutFile->flush();
+}
+
+void RewriteObjCFragileABI::Initialize(ASTContext &context) {
+ InitializeCommon(context);
+
+ // declaring objc_selector outside the parameter list removes a silly
+ // scope related warning...
+ if (IsHeader)
+ Preamble = "#pragma once\n";
+ Preamble += "struct objc_selector; struct objc_class;\n";
+ Preamble += "struct __rw_objc_super { struct objc_object *object; ";
+ Preamble += "struct objc_object *superClass; ";
+ if (LangOpts.MicrosoftExt) {
+ // Add a constructor for creating temporary objects.
+ Preamble += "__rw_objc_super(struct objc_object *o, struct objc_object *s) "
+ ": ";
+ Preamble += "object(o), superClass(s) {} ";
+ }
+ Preamble += "};\n";
+ Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
+ Preamble += "typedef struct objc_object Protocol;\n";
+ Preamble += "#define _REWRITER_typedef_Protocol\n";
+ Preamble += "#endif\n";
+ if (LangOpts.MicrosoftExt) {
+ Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
+ Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
+ } else
+ Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSend";
+ Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSendSuper";
+ Preamble += "(struct objc_super *, struct objc_selector *, ...);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object* objc_msgSend_stret";
+ Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object* objc_msgSendSuper_stret";
+ Preamble += "(struct objc_super *, struct objc_selector *, ...);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT double objc_msgSend_fpret";
+ Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getClass";
+ Preamble += "(const char *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *class_getSuperclass";
+ Preamble += "(struct objc_class *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getMetaClass";
+ Preamble += "(const char *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw(struct objc_object *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_enter(void *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_exit(void *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_exception_extract(void *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT int objc_exception_match";
+ Preamble += "(struct objc_class *, struct objc_object *);\n";
+ // @synchronized hooks.
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_enter(struct objc_object *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_exit(struct objc_object *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
+ Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
+ Preamble += "struct __objcFastEnumerationState {\n\t";
+ Preamble += "unsigned long state;\n\t";
+ Preamble += "void **itemsPtr;\n\t";
+ Preamble += "unsigned long *mutationsPtr;\n\t";
+ Preamble += "unsigned long extra[5];\n};\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_enumerationMutation(struct objc_object *);\n";
+ Preamble += "#define __FASTENUMERATIONSTATE\n";
+ Preamble += "#endif\n";
+ Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n";
+ Preamble += "struct __NSConstantStringImpl {\n";
+ Preamble += " int *isa;\n";
+ Preamble += " int flags;\n";
+ Preamble += " char *str;\n";
+ Preamble += " long length;\n";
+ Preamble += "};\n";
+ Preamble += "#ifdef CF_EXPORT_CONSTANT_STRING\n";
+ Preamble += "extern \"C\" __declspec(dllexport) int __CFConstantStringClassReference[];\n";
+ Preamble += "#else\n";
+ Preamble += "__OBJC_RW_DLLIMPORT int __CFConstantStringClassReference[];\n";
+ Preamble += "#endif\n";
+ Preamble += "#define __NSCONSTANTSTRINGIMPL\n";
+ Preamble += "#endif\n";
+ // Blocks preamble.
+ Preamble += "#ifndef BLOCK_IMPL\n";
+ Preamble += "#define BLOCK_IMPL\n";
+ Preamble += "struct __block_impl {\n";
+ Preamble += " void *isa;\n";
+ Preamble += " int Flags;\n";
+ Preamble += " int Reserved;\n";
+ Preamble += " void *FuncPtr;\n";
+ Preamble += "};\n";
+ Preamble += "// Runtime copy/destroy helper functions (from Block_private.h)\n";
+ Preamble += "#ifdef __OBJC_EXPORT_BLOCKS\n";
+ Preamble += "extern \"C\" __declspec(dllexport) "
+ "void _Block_object_assign(void *, const void *, const int);\n";
+ Preamble += "extern \"C\" __declspec(dllexport) void _Block_object_dispose(const void *, const int);\n";
+ Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteGlobalBlock[32];\n";
+ Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteStackBlock[32];\n";
+ Preamble += "#else\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_assign(void *, const void *, const int);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_dispose(const void *, const int);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteGlobalBlock[32];\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteStackBlock[32];\n";
+ Preamble += "#endif\n";
+ Preamble += "#endif\n";
+ if (LangOpts.MicrosoftExt) {
+ Preamble += "#undef __OBJC_RW_DLLIMPORT\n";
+ Preamble += "#undef __OBJC_RW_STATICIMPORT\n";
+ Preamble += "#ifndef KEEP_ATTRIBUTES\n"; // We use this for clang tests.
+ Preamble += "#define __attribute__(X)\n";
+ Preamble += "#endif\n";
+ Preamble += "#define __weak\n";
+ }
+ else {
+ Preamble += "#define __block\n";
+ Preamble += "#define __weak\n";
+ }
+ // NOTE! Windows uses LLP64 for 64bit mode. So, cast pointer to long long
+ // as this avoids warning in any 64bit/32bit compilation model.
+ Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
+}
+
+/// RewriteIvarOffsetComputation - This rutine synthesizes computation of
+/// ivar offset.
+void RewriteObjCFragileABI::RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
+ std::string &Result) {
+ if (ivar->isBitField()) {
+ // FIXME: The hack below doesn't work for bitfields. For now, we simply
+ // place all bitfields at offset 0.
+ Result += "0";
+ } else {
+ Result += "__OFFSETOFIVAR__(struct ";
+ Result += ivar->getContainingInterface()->getNameAsString();
+ if (LangOpts.MicrosoftExt)
+ Result += "_IMPL";
+ Result += ", ";
+ Result += ivar->getNameAsString();
+ Result += ")";
+ }
+}
+
+/// RewriteObjCProtocolMetaData - Rewrite protocols meta-data.
+void RewriteObjCFragileABI::RewriteObjCProtocolMetaData(
+ ObjCProtocolDecl *PDecl, StringRef prefix,
+ StringRef ClassName, std::string &Result) {
+ static bool objc_protocol_methods = false;
+
+ // Output struct protocol_methods holder of method selector and type.
+ if (!objc_protocol_methods && PDecl->hasDefinition()) {
+ /* struct protocol_methods {
+ SEL _cmd;
+ char *method_types;
+ }
+ */
+ Result += "\nstruct _protocol_methods {\n";
+ Result += "\tstruct objc_selector *_cmd;\n";
+ Result += "\tchar *method_types;\n";
+ Result += "};\n";
+
+ objc_protocol_methods = true;
+ }
+ // Do not synthesize the protocol more than once.
+ if (ObjCSynthesizedProtocols.count(PDecl->getCanonicalDecl()))
+ return;
+
+ if (ObjCProtocolDecl *Def = PDecl->getDefinition())
+ PDecl = Def;
+
+ if (PDecl->instmeth_begin() != PDecl->instmeth_end()) {
+ unsigned NumMethods = std::distance(PDecl->instmeth_begin(),
+ PDecl->instmeth_end());
+ /* struct _objc_protocol_method_list {
+ int protocol_method_count;
+ struct protocol_methods protocols[];
+ }
+ */
+ Result += "\nstatic struct {\n";
+ Result += "\tint protocol_method_count;\n";
+ Result += "\tstruct _protocol_methods protocol_methods[";
+ Result += utostr(NumMethods);
+ Result += "];\n} _OBJC_PROTOCOL_INSTANCE_METHODS_";
+ Result += PDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __cat_inst_meth\")))= "
+ "{\n\t" + utostr(NumMethods) + "\n";
+
+ // Output instance methods declared in this protocol.
+ for (ObjCProtocolDecl::instmeth_iterator
+ I = PDecl->instmeth_begin(), E = PDecl->instmeth_end();
+ I != E; ++I) {
+ if (I == PDecl->instmeth_begin())
+ Result += "\t ,{{(struct objc_selector *)\"";
+ else
+ Result += "\t ,{(struct objc_selector *)\"";
+ Result += (*I)->getSelector().getAsString();
+ std::string MethodTypeString;
+ Context->getObjCEncodingForMethodDecl((*I), MethodTypeString);
+ Result += "\", \"";
+ Result += MethodTypeString;
+ Result += "\"}\n";
+ }
+ Result += "\t }\n};\n";
+ }
+
+ // Output class methods declared in this protocol.
+ unsigned NumMethods = std::distance(PDecl->classmeth_begin(),
+ PDecl->classmeth_end());
+ if (NumMethods > 0) {
+ /* struct _objc_protocol_method_list {
+ int protocol_method_count;
+ struct protocol_methods protocols[];
+ }
+ */
+ Result += "\nstatic struct {\n";
+ Result += "\tint protocol_method_count;\n";
+ Result += "\tstruct _protocol_methods protocol_methods[";
+ Result += utostr(NumMethods);
+ Result += "];\n} _OBJC_PROTOCOL_CLASS_METHODS_";
+ Result += PDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= "
+ "{\n\t";
+ Result += utostr(NumMethods);
+ Result += "\n";
+
+ // Output instance methods declared in this protocol.
+ for (ObjCProtocolDecl::classmeth_iterator
+ I = PDecl->classmeth_begin(), E = PDecl->classmeth_end();
+ I != E; ++I) {
+ if (I == PDecl->classmeth_begin())
+ Result += "\t ,{{(struct objc_selector *)\"";
+ else
+ Result += "\t ,{(struct objc_selector *)\"";
+ Result += (*I)->getSelector().getAsString();
+ std::string MethodTypeString;
+ Context->getObjCEncodingForMethodDecl((*I), MethodTypeString);
+ Result += "\", \"";
+ Result += MethodTypeString;
+ Result += "\"}\n";
+ }
+ Result += "\t }\n};\n";
+ }
+
+ // Output:
+ /* struct _objc_protocol {
+ // Objective-C 1.0 extensions
+ struct _objc_protocol_extension *isa;
+ char *protocol_name;
+ struct _objc_protocol **protocol_list;
+ struct _objc_protocol_method_list *instance_methods;
+ struct _objc_protocol_method_list *class_methods;
+ };
+ */
+ static bool objc_protocol = false;
+ if (!objc_protocol) {
+ Result += "\nstruct _objc_protocol {\n";
+ Result += "\tstruct _objc_protocol_extension *isa;\n";
+ Result += "\tchar *protocol_name;\n";
+ Result += "\tstruct _objc_protocol **protocol_list;\n";
+ Result += "\tstruct _objc_protocol_method_list *instance_methods;\n";
+ Result += "\tstruct _objc_protocol_method_list *class_methods;\n";
+ Result += "};\n";
+
+ objc_protocol = true;
+ }
+
+ Result += "\nstatic struct _objc_protocol _OBJC_PROTOCOL_";
+ Result += PDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __protocol\")))= "
+ "{\n\t0, \"";
+ Result += PDecl->getNameAsString();
+ Result += "\", 0, ";
+ if (PDecl->instmeth_begin() != PDecl->instmeth_end()) {
+ Result += "(struct _objc_protocol_method_list *)&_OBJC_PROTOCOL_INSTANCE_METHODS_";
+ Result += PDecl->getNameAsString();
+ Result += ", ";
+ }
+ else
+ Result += "0, ";
+ if (PDecl->classmeth_begin() != PDecl->classmeth_end()) {
+ Result += "(struct _objc_protocol_method_list *)&_OBJC_PROTOCOL_CLASS_METHODS_";
+ Result += PDecl->getNameAsString();
+ Result += "\n";
+ }
+ else
+ Result += "0\n";
+ Result += "};\n";
+
+ // Mark this protocol as having been generated.
+ if (!ObjCSynthesizedProtocols.insert(PDecl->getCanonicalDecl()))
+ llvm_unreachable("protocol already synthesized");
+
+}
+
+void RewriteObjCFragileABI::RewriteObjCProtocolListMetaData(
+ const ObjCList<ObjCProtocolDecl> &Protocols,
+ StringRef prefix, StringRef ClassName,
+ std::string &Result) {
+ if (Protocols.empty()) return;
+
+ for (unsigned i = 0; i != Protocols.size(); i++)
+ RewriteObjCProtocolMetaData(Protocols[i], prefix, ClassName, Result);
+
+ // Output the top lovel protocol meta-data for the class.
+ /* struct _objc_protocol_list {
+ struct _objc_protocol_list *next;
+ int protocol_count;
+ struct _objc_protocol *class_protocols[];
+ }
+ */
+ Result += "\nstatic struct {\n";
+ Result += "\tstruct _objc_protocol_list *next;\n";
+ Result += "\tint protocol_count;\n";
+ Result += "\tstruct _objc_protocol *class_protocols[";
+ Result += utostr(Protocols.size());
+ Result += "];\n} _OBJC_";
+ Result += prefix;
+ Result += "_PROTOCOLS_";
+ Result += ClassName;
+ Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= "
+ "{\n\t0, ";
+ Result += utostr(Protocols.size());
+ Result += "\n";
+
+ Result += "\t,{&_OBJC_PROTOCOL_";
+ Result += Protocols[0]->getNameAsString();
+ Result += " \n";
+
+ for (unsigned i = 1; i != Protocols.size(); i++) {
+ Result += "\t ,&_OBJC_PROTOCOL_";
+ Result += Protocols[i]->getNameAsString();
+ Result += "\n";
+ }
+ Result += "\t }\n};\n";
+}
+
+void RewriteObjCFragileABI::RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
+ std::string &Result) {
+ ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
+
+ // Explicitly declared @interface's are already synthesized.
+ if (CDecl->isImplicitInterfaceDecl()) {
+ // FIXME: Implementation of a class with no @interface (legacy) does not
+ // produce correct synthesis as yet.
+ RewriteObjCInternalStruct(CDecl, Result);
+ }
+
+ // Build _objc_ivar_list metadata for classes ivars if needed
+ unsigned NumIvars = !IDecl->ivar_empty()
+ ? IDecl->ivar_size()
+ : (CDecl ? CDecl->ivar_size() : 0);
+ if (NumIvars > 0) {
+ static bool objc_ivar = false;
+ if (!objc_ivar) {
+ /* struct _objc_ivar {
+ char *ivar_name;
+ char *ivar_type;
+ int ivar_offset;
+ };
+ */
+ Result += "\nstruct _objc_ivar {\n";
+ Result += "\tchar *ivar_name;\n";
+ Result += "\tchar *ivar_type;\n";
+ Result += "\tint ivar_offset;\n";
+ Result += "};\n";
+
+ objc_ivar = true;
+ }
+
+ /* struct {
+ int ivar_count;
+ struct _objc_ivar ivar_list[nIvars];
+ };
+ */
+ Result += "\nstatic struct {\n";
+ Result += "\tint ivar_count;\n";
+ Result += "\tstruct _objc_ivar ivar_list[";
+ Result += utostr(NumIvars);
+ Result += "];\n} _OBJC_INSTANCE_VARIABLES_";
+ Result += IDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __instance_vars\")))= "
+ "{\n\t";
+ Result += utostr(NumIvars);
+ Result += "\n";
+
+ ObjCInterfaceDecl::ivar_iterator IVI, IVE;
+ SmallVector<ObjCIvarDecl *, 8> IVars;
+ if (!IDecl->ivar_empty()) {
+ for (ObjCInterfaceDecl::ivar_iterator
+ IV = IDecl->ivar_begin(), IVEnd = IDecl->ivar_end();
+ IV != IVEnd; ++IV)
+ IVars.push_back(*IV);
+ IVI = IDecl->ivar_begin();
+ IVE = IDecl->ivar_end();
+ } else {
+ IVI = CDecl->ivar_begin();
+ IVE = CDecl->ivar_end();
+ }
+ Result += "\t,{{\"";
+ Result += (*IVI)->getNameAsString();
+ Result += "\", \"";
+ std::string TmpString, StrEncoding;
+ Context->getObjCEncodingForType((*IVI)->getType(), TmpString, *IVI);
+ QuoteDoublequotes(TmpString, StrEncoding);
+ Result += StrEncoding;
+ Result += "\", ";
+ RewriteIvarOffsetComputation(*IVI, Result);
+ Result += "}\n";
+ for (++IVI; IVI != IVE; ++IVI) {
+ Result += "\t ,{\"";
+ Result += (*IVI)->getNameAsString();
+ Result += "\", \"";
+ std::string TmpString, StrEncoding;
+ Context->getObjCEncodingForType((*IVI)->getType(), TmpString, *IVI);
+ QuoteDoublequotes(TmpString, StrEncoding);
+ Result += StrEncoding;
+ Result += "\", ";
+ RewriteIvarOffsetComputation((*IVI), Result);
+ Result += "}\n";
+ }
+
+ Result += "\t }\n};\n";
+ }
+
+ // Build _objc_method_list for class's instance methods if needed
+ SmallVector<ObjCMethodDecl *, 32>
+ InstanceMethods(IDecl->instmeth_begin(), IDecl->instmeth_end());
+
+ // If any of our property implementations have associated getters or
+ // setters, produce metadata for them as well.
+ for (ObjCImplDecl::propimpl_iterator Prop = IDecl->propimpl_begin(),
+ PropEnd = IDecl->propimpl_end();
+ Prop != PropEnd; ++Prop) {
+ if ((*Prop)->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
+ continue;
+ if (!(*Prop)->getPropertyIvarDecl())
+ continue;
+ ObjCPropertyDecl *PD = (*Prop)->getPropertyDecl();
+ if (!PD)
+ continue;
+ if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
+ if (!Getter->isDefined())
+ InstanceMethods.push_back(Getter);
+ if (PD->isReadOnly())
+ continue;
+ if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
+ if (!Setter->isDefined())
+ InstanceMethods.push_back(Setter);
+ }
+ RewriteObjCMethodsMetaData(InstanceMethods.begin(), InstanceMethods.end(),
+ true, "", IDecl->getName(), Result);
+
+ // Build _objc_method_list for class's class methods if needed
+ RewriteObjCMethodsMetaData(IDecl->classmeth_begin(), IDecl->classmeth_end(),
+ false, "", IDecl->getName(), Result);
+
+ // Protocols referenced in class declaration?
+ RewriteObjCProtocolListMetaData(CDecl->getReferencedProtocols(),
+ "CLASS", CDecl->getName(), Result);
+
+ // Declaration of class/meta-class metadata
+ /* struct _objc_class {
+ struct _objc_class *isa; // or const char *root_class_name when metadata
+ const char *super_class_name;
+ char *name;
+ long version;
+ long info;
+ long instance_size;
+ struct _objc_ivar_list *ivars;
+ struct _objc_method_list *methods;
+ struct objc_cache *cache;
+ struct objc_protocol_list *protocols;
+ const char *ivar_layout;
+ struct _objc_class_ext *ext;
+ };
+ */
+ static bool objc_class = false;
+ if (!objc_class) {
+ Result += "\nstruct _objc_class {\n";
+ Result += "\tstruct _objc_class *isa;\n";
+ Result += "\tconst char *super_class_name;\n";
+ Result += "\tchar *name;\n";
+ Result += "\tlong version;\n";
+ Result += "\tlong info;\n";
+ Result += "\tlong instance_size;\n";
+ Result += "\tstruct _objc_ivar_list *ivars;\n";
+ Result += "\tstruct _objc_method_list *methods;\n";
+ Result += "\tstruct objc_cache *cache;\n";
+ Result += "\tstruct _objc_protocol_list *protocols;\n";
+ Result += "\tconst char *ivar_layout;\n";
+ Result += "\tstruct _objc_class_ext *ext;\n";
+ Result += "};\n";
+ objc_class = true;
+ }
+
+ // Meta-class metadata generation.
+ ObjCInterfaceDecl *RootClass = 0;
+ ObjCInterfaceDecl *SuperClass = CDecl->getSuperClass();
+ while (SuperClass) {
+ RootClass = SuperClass;
+ SuperClass = SuperClass->getSuperClass();
+ }
+ SuperClass = CDecl->getSuperClass();
+
+ Result += "\nstatic struct _objc_class _OBJC_METACLASS_";
+ Result += CDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __meta_class\")))= "
+ "{\n\t(struct _objc_class *)\"";
+ Result += (RootClass ? RootClass->getNameAsString() : CDecl->getNameAsString());
+ Result += "\"";
+
+ if (SuperClass) {
+ Result += ", \"";
+ Result += SuperClass->getNameAsString();
+ Result += "\", \"";
+ Result += CDecl->getNameAsString();
+ Result += "\"";
+ }
+ else {
+ Result += ", 0, \"";
+ Result += CDecl->getNameAsString();
+ Result += "\"";
+ }
+ // Set 'ivars' field for root class to 0. ObjC1 runtime does not use it.
+ // 'info' field is initialized to CLS_META(2) for metaclass
+ Result += ", 0,2, sizeof(struct _objc_class), 0";
+ if (IDecl->classmeth_begin() != IDecl->classmeth_end()) {
+ Result += "\n\t, (struct _objc_method_list *)&_OBJC_CLASS_METHODS_";
+ Result += IDecl->getNameAsString();
+ Result += "\n";
+ }
+ else
+ Result += ", 0\n";
+ if (CDecl->protocol_begin() != CDecl->protocol_end()) {
+ Result += "\t,0, (struct _objc_protocol_list *)&_OBJC_CLASS_PROTOCOLS_";
+ Result += CDecl->getNameAsString();
+ Result += ",0,0\n";
+ }
+ else
+ Result += "\t,0,0,0,0\n";
+ Result += "};\n";
+
+ // class metadata generation.
+ Result += "\nstatic struct _objc_class _OBJC_CLASS_";
+ Result += CDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __class\")))= "
+ "{\n\t&_OBJC_METACLASS_";
+ Result += CDecl->getNameAsString();
+ if (SuperClass) {
+ Result += ", \"";
+ Result += SuperClass->getNameAsString();
+ Result += "\", \"";
+ Result += CDecl->getNameAsString();
+ Result += "\"";
+ }
+ else {
+ Result += ", 0, \"";
+ Result += CDecl->getNameAsString();
+ Result += "\"";
+ }
+ // 'info' field is initialized to CLS_CLASS(1) for class
+ Result += ", 0,1";
+ if (!ObjCSynthesizedStructs.count(CDecl))
+ Result += ",0";
+ else {
+ // class has size. Must synthesize its size.
+ Result += ",sizeof(struct ";
+ Result += CDecl->getNameAsString();
+ if (LangOpts.MicrosoftExt)
+ Result += "_IMPL";
+ Result += ")";
+ }
+ if (NumIvars > 0) {
+ Result += ", (struct _objc_ivar_list *)&_OBJC_INSTANCE_VARIABLES_";
+ Result += CDecl->getNameAsString();
+ Result += "\n\t";
+ }
+ else
+ Result += ",0";
+ if (IDecl->instmeth_begin() != IDecl->instmeth_end()) {
+ Result += ", (struct _objc_method_list *)&_OBJC_INSTANCE_METHODS_";
+ Result += CDecl->getNameAsString();
+ Result += ", 0\n\t";
+ }
+ else
+ Result += ",0,0";
+ if (CDecl->protocol_begin() != CDecl->protocol_end()) {
+ Result += ", (struct _objc_protocol_list*)&_OBJC_CLASS_PROTOCOLS_";
+ Result += CDecl->getNameAsString();
+ Result += ", 0,0\n";
+ }
+ else
+ Result += ",0,0,0\n";
+ Result += "};\n";
+}
+
+void RewriteObjCFragileABI::RewriteMetaDataIntoBuffer(std::string &Result) {
+ int ClsDefCount = ClassImplementation.size();
+ int CatDefCount = CategoryImplementation.size();
+
+ // For each implemented class, write out all its meta data.
+ for (int i = 0; i < ClsDefCount; i++)
+ RewriteObjCClassMetaData(ClassImplementation[i], Result);
+
+ // For each implemented category, write out all its meta data.
+ for (int i = 0; i < CatDefCount; i++)
+ RewriteObjCCategoryImplDecl(CategoryImplementation[i], Result);
+
+ // Write objc_symtab metadata
+ /*
+ struct _objc_symtab
+ {
+ long sel_ref_cnt;
+ SEL *refs;
+ short cls_def_cnt;
+ short cat_def_cnt;
+ void *defs[cls_def_cnt + cat_def_cnt];
+ };
+ */
+
+ Result += "\nstruct _objc_symtab {\n";
+ Result += "\tlong sel_ref_cnt;\n";
+ Result += "\tSEL *refs;\n";
+ Result += "\tshort cls_def_cnt;\n";
+ Result += "\tshort cat_def_cnt;\n";
+ Result += "\tvoid *defs[" + utostr(ClsDefCount + CatDefCount)+ "];\n";
+ Result += "};\n\n";
+
+ Result += "static struct _objc_symtab "
+ "_OBJC_SYMBOLS __attribute__((used, section (\"__OBJC, __symbols\")))= {\n";
+ Result += "\t0, 0, " + utostr(ClsDefCount)
+ + ", " + utostr(CatDefCount) + "\n";
+ for (int i = 0; i < ClsDefCount; i++) {
+ Result += "\t,&_OBJC_CLASS_";
+ Result += ClassImplementation[i]->getNameAsString();
+ Result += "\n";
+ }
+
+ for (int i = 0; i < CatDefCount; i++) {
+ Result += "\t,&_OBJC_CATEGORY_";
+ Result += CategoryImplementation[i]->getClassInterface()->getNameAsString();
+ Result += "_";
+ Result += CategoryImplementation[i]->getNameAsString();
+ Result += "\n";
+ }
+
+ Result += "};\n\n";
+
+ // Write objc_module metadata
+
+ /*
+ struct _objc_module {
+ long version;
+ long size;
+ const char *name;
+ struct _objc_symtab *symtab;
+ }
+ */
+
+ Result += "\nstruct _objc_module {\n";
+ Result += "\tlong version;\n";
+ Result += "\tlong size;\n";
+ Result += "\tconst char *name;\n";
+ Result += "\tstruct _objc_symtab *symtab;\n";
+ Result += "};\n\n";
+ Result += "static struct _objc_module "
+ "_OBJC_MODULES __attribute__ ((used, section (\"__OBJC, __module_info\")))= {\n";
+ Result += "\t" + utostr(OBJC_ABI_VERSION) +
+ ", sizeof(struct _objc_module), \"\", &_OBJC_SYMBOLS\n";
+ Result += "};\n\n";
+
+ if (LangOpts.MicrosoftExt) {
+ if (ProtocolExprDecls.size()) {
+ Result += "#pragma section(\".objc_protocol$B\",long,read,write)\n";
+ Result += "#pragma data_seg(push, \".objc_protocol$B\")\n";
+ for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
+ E = ProtocolExprDecls.end(); I != E; ++I) {
+ Result += "static struct _objc_protocol *_POINTER_OBJC_PROTOCOL_";
+ Result += (*I)->getNameAsString();
+ Result += " = &_OBJC_PROTOCOL_";
+ Result += (*I)->getNameAsString();
+ Result += ";\n";
+ }
+ Result += "#pragma data_seg(pop)\n\n";
+ }
+ Result += "#pragma section(\".objc_module_info$B\",long,read,write)\n";
+ Result += "#pragma data_seg(push, \".objc_module_info$B\")\n";
+ Result += "static struct _objc_module *_POINTER_OBJC_MODULES = ";
+ Result += "&_OBJC_MODULES;\n";
+ Result += "#pragma data_seg(pop)\n\n";
+ }
+}
+
+/// RewriteObjCCategoryImplDecl - Rewrite metadata for each category
+/// implementation.
+void RewriteObjCFragileABI::RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *IDecl,
+ std::string &Result) {
+ ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
+ // Find category declaration for this implementation.
+ ObjCCategoryDecl *CDecl;
+ for (CDecl = ClassDecl->getCategoryList(); CDecl;
+ CDecl = CDecl->getNextClassCategory())
+ if (CDecl->getIdentifier() == IDecl->getIdentifier())
+ break;
+
+ std::string FullCategoryName = ClassDecl->getNameAsString();
+ FullCategoryName += '_';
+ FullCategoryName += IDecl->getNameAsString();
+
+ // Build _objc_method_list for class's instance methods if needed
+ SmallVector<ObjCMethodDecl *, 32>
+ InstanceMethods(IDecl->instmeth_begin(), IDecl->instmeth_end());
+
+ // If any of our property implementations have associated getters or
+ // setters, produce metadata for them as well.
+ for (ObjCImplDecl::propimpl_iterator Prop = IDecl->propimpl_begin(),
+ PropEnd = IDecl->propimpl_end();
+ Prop != PropEnd; ++Prop) {
+ if ((*Prop)->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
+ continue;
+ if (!(*Prop)->getPropertyIvarDecl())
+ continue;
+ ObjCPropertyDecl *PD = (*Prop)->getPropertyDecl();
+ if (!PD)
+ continue;
+ if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
+ InstanceMethods.push_back(Getter);
+ if (PD->isReadOnly())
+ continue;
+ if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
+ InstanceMethods.push_back(Setter);
+ }
+ RewriteObjCMethodsMetaData(InstanceMethods.begin(), InstanceMethods.end(),
+ true, "CATEGORY_", FullCategoryName.c_str(),
+ Result);
+
+ // Build _objc_method_list for class's class methods if needed
+ RewriteObjCMethodsMetaData(IDecl->classmeth_begin(), IDecl->classmeth_end(),
+ false, "CATEGORY_", FullCategoryName.c_str(),
+ Result);
+
+ // Protocols referenced in class declaration?
+ // Null CDecl is case of a category implementation with no category interface
+ if (CDecl)
+ RewriteObjCProtocolListMetaData(CDecl->getReferencedProtocols(), "CATEGORY",
+ FullCategoryName, Result);
+ /* struct _objc_category {
+ char *category_name;
+ char *class_name;
+ struct _objc_method_list *instance_methods;
+ struct _objc_method_list *class_methods;
+ struct _objc_protocol_list *protocols;
+ // Objective-C 1.0 extensions
+ uint32_t size; // sizeof (struct _objc_category)
+ struct _objc_property_list *instance_properties; // category's own
+ // @property decl.
+ };
+ */
+
+ static bool objc_category = false;
+ if (!objc_category) {
+ Result += "\nstruct _objc_category {\n";
+ Result += "\tchar *category_name;\n";
+ Result += "\tchar *class_name;\n";
+ Result += "\tstruct _objc_method_list *instance_methods;\n";
+ Result += "\tstruct _objc_method_list *class_methods;\n";
+ Result += "\tstruct _objc_protocol_list *protocols;\n";
+ Result += "\tunsigned int size;\n";
+ Result += "\tstruct _objc_property_list *instance_properties;\n";
+ Result += "};\n";
+ objc_category = true;
+ }
+ Result += "\nstatic struct _objc_category _OBJC_CATEGORY_";
+ Result += FullCategoryName;
+ Result += " __attribute__ ((used, section (\"__OBJC, __category\")))= {\n\t\"";
+ Result += IDecl->getNameAsString();
+ Result += "\"\n\t, \"";
+ Result += ClassDecl->getNameAsString();
+ Result += "\"\n";
+
+ if (IDecl->instmeth_begin() != IDecl->instmeth_end()) {
+ Result += "\t, (struct _objc_method_list *)"
+ "&_OBJC_CATEGORY_INSTANCE_METHODS_";
+ Result += FullCategoryName;
+ Result += "\n";
+ }
+ else
+ Result += "\t, 0\n";
+ if (IDecl->classmeth_begin() != IDecl->classmeth_end()) {
+ Result += "\t, (struct _objc_method_list *)"
+ "&_OBJC_CATEGORY_CLASS_METHODS_";
+ Result += FullCategoryName;
+ Result += "\n";
+ }
+ else
+ Result += "\t, 0\n";
+
+ if (CDecl && CDecl->protocol_begin() != CDecl->protocol_end()) {
+ Result += "\t, (struct _objc_protocol_list *)&_OBJC_CATEGORY_PROTOCOLS_";
+ Result += FullCategoryName;
+ Result += "\n";
+ }
+ else
+ Result += "\t, 0\n";
+ Result += "\t, sizeof(struct _objc_category), 0\n};\n";
+}
+
+// RewriteObjCMethodsMetaData - Rewrite methods metadata for instance or
+/// class methods.
+template<typename MethodIterator>
+void RewriteObjCFragileABI::RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
+ MethodIterator MethodEnd,
+ bool IsInstanceMethod,
+ StringRef prefix,
+ StringRef ClassName,
+ std::string &Result) {
+ if (MethodBegin == MethodEnd) return;
+
+ if (!objc_impl_method) {
+ /* struct _objc_method {
+ SEL _cmd;
+ char *method_types;
+ void *_imp;
+ }
+ */
+ Result += "\nstruct _objc_method {\n";
+ Result += "\tSEL _cmd;\n";
+ Result += "\tchar *method_types;\n";
+ Result += "\tvoid *_imp;\n";
+ Result += "};\n";
+
+ objc_impl_method = true;
+ }
+
+ // Build _objc_method_list for class's methods if needed
+
+ /* struct {
+ struct _objc_method_list *next_method;
+ int method_count;
+ struct _objc_method method_list[];
+ }
+ */
+ unsigned NumMethods = std::distance(MethodBegin, MethodEnd);
+ Result += "\nstatic struct {\n";
+ Result += "\tstruct _objc_method_list *next_method;\n";
+ Result += "\tint method_count;\n";
+ Result += "\tstruct _objc_method method_list[";
+ Result += utostr(NumMethods);
+ Result += "];\n} _OBJC_";
+ Result += prefix;
+ Result += IsInstanceMethod ? "INSTANCE" : "CLASS";
+ Result += "_METHODS_";
+ Result += ClassName;
+ Result += " __attribute__ ((used, section (\"__OBJC, __";
+ Result += IsInstanceMethod ? "inst" : "cls";
+ Result += "_meth\")))= ";
+ Result += "{\n\t0, " + utostr(NumMethods) + "\n";
+
+ Result += "\t,{{(SEL)\"";
+ Result += (*MethodBegin)->getSelector().getAsString().c_str();
+ std::string MethodTypeString;
+ Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
+ Result += "\", \"";
+ Result += MethodTypeString;
+ Result += "\", (void *)";
+ Result += MethodInternalNames[*MethodBegin];
+ Result += "}\n";
+ for (++MethodBegin; MethodBegin != MethodEnd; ++MethodBegin) {
+ Result += "\t ,{(SEL)\"";
+ Result += (*MethodBegin)->getSelector().getAsString().c_str();
+ std::string MethodTypeString;
+ Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
+ Result += "\", \"";
+ Result += MethodTypeString;
+ Result += "\", (void *)";
+ Result += MethodInternalNames[*MethodBegin];
+ Result += "}\n";
+ }
+ Result += "\t }\n};\n";
+}
+
+Stmt *RewriteObjCFragileABI::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) {
+ SourceRange OldRange = IV->getSourceRange();
+ Expr *BaseExpr = IV->getBase();
+
+ // Rewrite the base, but without actually doing replaces.
+ {
+ DisableReplaceStmtScope S(*this);
+ BaseExpr = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(BaseExpr));
+ IV->setBase(BaseExpr);
+ }
+
+ ObjCIvarDecl *D = IV->getDecl();
+
+ Expr *Replacement = IV;
+ if (CurMethodDef) {
+ if (BaseExpr->getType()->isObjCObjectPointerType()) {
+ const ObjCInterfaceType *iFaceDecl =
+ dyn_cast<ObjCInterfaceType>(BaseExpr->getType()->getPointeeType());
+ assert(iFaceDecl && "RewriteObjCIvarRefExpr - iFaceDecl is null");
+ // lookup which class implements the instance variable.
+ ObjCInterfaceDecl *clsDeclared = 0;
+ iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
+ clsDeclared);
+ assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
+
+ // Synthesize an explicit cast to gain access to the ivar.
+ std::string RecName = clsDeclared->getIdentifier()->getName();
+ RecName += "_IMPL";
+ IdentifierInfo *II = &Context->Idents.get(RecName);
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ II);
+ assert(RD && "RewriteObjCIvarRefExpr(): Can't find RecordDecl");
+ QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
+ CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, castT,
+ CK_BitCast,
+ IV->getBase());
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(OldRange.getBegin(),
+ OldRange.getEnd(),
+ castExpr);
+ if (IV->isFreeIvar() &&
+ declaresSameEntity(CurMethodDef->getClassInterface(), iFaceDecl->getDecl())) {
+ MemberExpr *ME = new (Context) MemberExpr(PE, true, D,
+ IV->getLocation(),
+ D->getType(),
+ VK_LValue, OK_Ordinary);
+ Replacement = ME;
+ } else {
+ IV->setBase(PE);
+ }
+ }
+ } else { // we are outside a method.
+ assert(!IV->isFreeIvar() && "Cannot have a free standing ivar outside a method");
+
+ // Explicit ivar refs need to have a cast inserted.
+ // FIXME: consider sharing some of this code with the code above.
+ if (BaseExpr->getType()->isObjCObjectPointerType()) {
+ const ObjCInterfaceType *iFaceDecl =
+ dyn_cast<ObjCInterfaceType>(BaseExpr->getType()->getPointeeType());
+ // lookup which class implements the instance variable.
+ ObjCInterfaceDecl *clsDeclared = 0;
+ iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
+ clsDeclared);
+ assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
+
+ // Synthesize an explicit cast to gain access to the ivar.
+ std::string RecName = clsDeclared->getIdentifier()->getName();
+ RecName += "_IMPL";
+ IdentifierInfo *II = &Context->Idents.get(RecName);
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ II);
+ assert(RD && "RewriteObjCIvarRefExpr(): Can't find RecordDecl");
+ QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
+ CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, castT,
+ CK_BitCast,
+ IV->getBase());
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(IV->getBase()->getLocStart(),
+ IV->getBase()->getLocEnd(), castExpr);
+ // Cannot delete IV->getBase(), since PE points to it.
+ // Replace the old base with the cast. This is important when doing
+ // embedded rewrites. For example, [newInv->_container addObject:0].
+ IV->setBase(PE);
+ }
+ }
+
+ ReplaceStmtWithRange(IV, Replacement, OldRange);
+ return Replacement;
+}
+
diff --git a/clang/lib/Rewrite/RewriteRope.cpp b/clang/lib/Rewrite/RewriteRope.cpp
new file mode 100644
index 0000000..cc8de1b
--- /dev/null
+++ b/clang/lib/Rewrite/RewriteRope.cpp
@@ -0,0 +1,811 @@
+//===--- RewriteRope.cpp - Rope specialized for rewriter --------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the RewriteRope class, which is a powerful string.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/RewriteRope.h"
+#include "clang/Basic/LLVM.h"
+#include <algorithm>
+using namespace clang;
+
+/// RewriteRope is a "strong" string class, designed to make insertions and
+/// deletions in the middle of the string nearly constant time (really, they are
+/// O(log N), but with a very low constant factor).
+///
+/// The implementation of this datastructure is a conceptual linear sequence of
+/// RopePiece elements. Each RopePiece represents a view on a separately
+/// allocated and reference counted string. This means that splitting a very
+/// long string can be done in constant time by splitting a RopePiece that
+/// references the whole string into two rope pieces that reference each half.
+/// Once split, another string can be inserted in between the two halves by
+/// inserting a RopePiece in between the two others. All of this is very
+/// inexpensive: it takes time proportional to the number of RopePieces, not the
+/// length of the strings they represent.
+///
+/// While a linear sequences of RopePieces is the conceptual model, the actual
+/// implementation captures them in an adapted B+ Tree. Using a B+ tree (which
+/// is a tree that keeps the values in the leaves and has where each node
+/// contains a reasonable number of pointers to children/values) allows us to
+/// maintain efficient operation when the RewriteRope contains a *huge* number
+/// of RopePieces. The basic idea of the B+ Tree is that it allows us to find
+/// the RopePiece corresponding to some offset very efficiently, and it
+/// automatically balances itself on insertions of RopePieces (which can happen
+/// for both insertions and erases of string ranges).
+///
+/// The one wrinkle on the theory is that we don't attempt to keep the tree
+/// properly balanced when erases happen. Erases of string data can both insert
+/// new RopePieces (e.g. when the middle of some other rope piece is deleted,
+/// which results in two rope pieces, which is just like an insert) or it can
+/// reduce the number of RopePieces maintained by the B+Tree. In the case when
+/// the number of RopePieces is reduced, we don't attempt to maintain the
+/// standard 'invariant' that each node in the tree contains at least
+/// 'WidthFactor' children/values. For our use cases, this doesn't seem to
+/// matter.
+///
+/// The implementation below is primarily implemented in terms of three classes:
+/// RopePieceBTreeNode - Common base class for:
+///
+/// RopePieceBTreeLeaf - Directly manages up to '2*WidthFactor' RopePiece
+/// nodes. This directly represents a chunk of the string with those
+/// RopePieces contatenated.
+/// RopePieceBTreeInterior - An interior node in the B+ Tree, which manages
+/// up to '2*WidthFactor' other nodes in the tree.
+
+
+//===----------------------------------------------------------------------===//
+// RopePieceBTreeNode Class
+//===----------------------------------------------------------------------===//
+
+namespace {
+ /// RopePieceBTreeNode - Common base class of RopePieceBTreeLeaf and
+ /// RopePieceBTreeInterior. This provides some 'virtual' dispatching methods
+ /// and a flag that determines which subclass the instance is. Also
+ /// important, this node knows the full extend of the node, including any
+ /// children that it has. This allows efficient skipping over entire subtrees
+ /// when looking for an offset in the BTree.
+ class RopePieceBTreeNode {
+ protected:
+ /// WidthFactor - This controls the number of K/V slots held in the BTree:
+ /// how wide it is. Each level of the BTree is guaranteed to have at least
+ /// 'WidthFactor' elements in it (either ropepieces or children), (except
+ /// the root, which may have less) and may have at most 2*WidthFactor
+ /// elements.
+ enum { WidthFactor = 8 };
+
+ /// Size - This is the number of bytes of file this node (including any
+ /// potential children) covers.
+ unsigned Size;
+
+ /// IsLeaf - True if this is an instance of RopePieceBTreeLeaf, false if it
+ /// is an instance of RopePieceBTreeInterior.
+ bool IsLeaf;
+
+ RopePieceBTreeNode(bool isLeaf) : Size(0), IsLeaf(isLeaf) {}
+ ~RopePieceBTreeNode() {}
+ public:
+
+ bool isLeaf() const { return IsLeaf; }
+ unsigned size() const { return Size; }
+
+ void Destroy();
+
+ /// split - Split the range containing the specified offset so that we are
+ /// guaranteed that there is a place to do an insertion at the specified
+ /// offset. The offset is relative, so "0" is the start of the node.
+ ///
+ /// If there is no space in this subtree for the extra piece, the extra tree
+ /// node is returned and must be inserted into a parent.
+ RopePieceBTreeNode *split(unsigned Offset);
+
+ /// insert - Insert the specified ropepiece into this tree node at the
+ /// specified offset. The offset is relative, so "0" is the start of the
+ /// node.
+ ///
+ /// If there is no space in this subtree for the extra piece, the extra tree
+ /// node is returned and must be inserted into a parent.
+ RopePieceBTreeNode *insert(unsigned Offset, const RopePiece &R);
+
+ /// erase - Remove NumBytes from this node at the specified offset. We are
+ /// guaranteed that there is a split at Offset.
+ void erase(unsigned Offset, unsigned NumBytes);
+
+ //static inline bool classof(const RopePieceBTreeNode *) { return true; }
+
+ };
+} // end anonymous namespace
+
+//===----------------------------------------------------------------------===//
+// RopePieceBTreeLeaf Class
+//===----------------------------------------------------------------------===//
+
+namespace {
+ /// RopePieceBTreeLeaf - Directly manages up to '2*WidthFactor' RopePiece
+ /// nodes. This directly represents a chunk of the string with those
+ /// RopePieces contatenated. Since this is a B+Tree, all values (in this case
+ /// instances of RopePiece) are stored in leaves like this. To make iteration
+ /// over the leaves efficient, they maintain a singly linked list through the
+ /// NextLeaf field. This allows the B+Tree forward iterator to be constant
+ /// time for all increments.
+ class RopePieceBTreeLeaf : public RopePieceBTreeNode {
+ /// NumPieces - This holds the number of rope pieces currently active in the
+ /// Pieces array.
+ unsigned char NumPieces;
+
+ /// Pieces - This tracks the file chunks currently in this leaf.
+ ///
+ RopePiece Pieces[2*WidthFactor];
+
+ /// NextLeaf - This is a pointer to the next leaf in the tree, allowing
+ /// efficient in-order forward iteration of the tree without traversal.
+ RopePieceBTreeLeaf **PrevLeaf, *NextLeaf;
+ public:
+ RopePieceBTreeLeaf() : RopePieceBTreeNode(true), NumPieces(0),
+ PrevLeaf(0), NextLeaf(0) {}
+ ~RopePieceBTreeLeaf() {
+ if (PrevLeaf || NextLeaf)
+ removeFromLeafInOrder();
+ clear();
+ }
+
+ bool isFull() const { return NumPieces == 2*WidthFactor; }
+
+ /// clear - Remove all rope pieces from this leaf.
+ void clear() {
+ while (NumPieces)
+ Pieces[--NumPieces] = RopePiece();
+ Size = 0;
+ }
+
+ unsigned getNumPieces() const { return NumPieces; }
+
+ const RopePiece &getPiece(unsigned i) const {
+ assert(i < getNumPieces() && "Invalid piece ID");
+ return Pieces[i];
+ }
+
+ const RopePieceBTreeLeaf *getNextLeafInOrder() const { return NextLeaf; }
+ void insertAfterLeafInOrder(RopePieceBTreeLeaf *Node) {
+ assert(PrevLeaf == 0 && NextLeaf == 0 && "Already in ordering");
+
+ NextLeaf = Node->NextLeaf;
+ if (NextLeaf)
+ NextLeaf->PrevLeaf = &NextLeaf;
+ PrevLeaf = &Node->NextLeaf;
+ Node->NextLeaf = this;
+ }
+
+ void removeFromLeafInOrder() {
+ if (PrevLeaf) {
+ *PrevLeaf = NextLeaf;
+ if (NextLeaf)
+ NextLeaf->PrevLeaf = PrevLeaf;
+ } else if (NextLeaf) {
+ NextLeaf->PrevLeaf = 0;
+ }
+ }
+
+ /// FullRecomputeSizeLocally - This method recomputes the 'Size' field by
+ /// summing the size of all RopePieces.
+ void FullRecomputeSizeLocally() {
+ Size = 0;
+ for (unsigned i = 0, e = getNumPieces(); i != e; ++i)
+ Size += getPiece(i).size();
+ }
+
+ /// split - Split the range containing the specified offset so that we are
+ /// guaranteed that there is a place to do an insertion at the specified
+ /// offset. The offset is relative, so "0" is the start of the node.
+ ///
+ /// If there is no space in this subtree for the extra piece, the extra tree
+ /// node is returned and must be inserted into a parent.
+ RopePieceBTreeNode *split(unsigned Offset);
+
+ /// insert - Insert the specified ropepiece into this tree node at the
+ /// specified offset. The offset is relative, so "0" is the start of the
+ /// node.
+ ///
+ /// If there is no space in this subtree for the extra piece, the extra tree
+ /// node is returned and must be inserted into a parent.
+ RopePieceBTreeNode *insert(unsigned Offset, const RopePiece &R);
+
+
+ /// erase - Remove NumBytes from this node at the specified offset. We are
+ /// guaranteed that there is a split at Offset.
+ void erase(unsigned Offset, unsigned NumBytes);
+
+ //static inline bool classof(const RopePieceBTreeLeaf *) { return true; }
+ static inline bool classof(const RopePieceBTreeNode *N) {
+ return N->isLeaf();
+ }
+ };
+} // end anonymous namespace
+
+/// split - Split the range containing the specified offset so that we are
+/// guaranteed that there is a place to do an insertion at the specified
+/// offset. The offset is relative, so "0" is the start of the node.
+///
+/// If there is no space in this subtree for the extra piece, the extra tree
+/// node is returned and must be inserted into a parent.
+RopePieceBTreeNode *RopePieceBTreeLeaf::split(unsigned Offset) {
+ // Find the insertion point. We are guaranteed that there is a split at the
+ // specified offset so find it.
+ if (Offset == 0 || Offset == size()) {
+ // Fastpath for a common case. There is already a splitpoint at the end.
+ return 0;
+ }
+
+ // Find the piece that this offset lands in.
+ unsigned PieceOffs = 0;
+ unsigned i = 0;
+ while (Offset >= PieceOffs+Pieces[i].size()) {
+ PieceOffs += Pieces[i].size();
+ ++i;
+ }
+
+ // If there is already a split point at the specified offset, just return
+ // success.
+ if (PieceOffs == Offset)
+ return 0;
+
+ // Otherwise, we need to split piece 'i' at Offset-PieceOffs. Convert Offset
+ // to being Piece relative.
+ unsigned IntraPieceOffset = Offset-PieceOffs;
+
+ // We do this by shrinking the RopePiece and then doing an insert of the tail.
+ RopePiece Tail(Pieces[i].StrData, Pieces[i].StartOffs+IntraPieceOffset,
+ Pieces[i].EndOffs);
+ Size -= Pieces[i].size();
+ Pieces[i].EndOffs = Pieces[i].StartOffs+IntraPieceOffset;
+ Size += Pieces[i].size();
+
+ return insert(Offset, Tail);
+}
+
+
+/// insert - Insert the specified RopePiece into this tree node at the
+/// specified offset. The offset is relative, so "0" is the start of the node.
+///
+/// If there is no space in this subtree for the extra piece, the extra tree
+/// node is returned and must be inserted into a parent.
+RopePieceBTreeNode *RopePieceBTreeLeaf::insert(unsigned Offset,
+ const RopePiece &R) {
+ // If this node is not full, insert the piece.
+ if (!isFull()) {
+ // Find the insertion point. We are guaranteed that there is a split at the
+ // specified offset so find it.
+ unsigned i = 0, e = getNumPieces();
+ if (Offset == size()) {
+ // Fastpath for a common case.
+ i = e;
+ } else {
+ unsigned SlotOffs = 0;
+ for (; Offset > SlotOffs; ++i)
+ SlotOffs += getPiece(i).size();
+ assert(SlotOffs == Offset && "Split didn't occur before insertion!");
+ }
+
+ // For an insertion into a non-full leaf node, just insert the value in
+ // its sorted position. This requires moving later values over.
+ for (; i != e; --e)
+ Pieces[e] = Pieces[e-1];
+ Pieces[i] = R;
+ ++NumPieces;
+ Size += R.size();
+ return 0;
+ }
+
+ // Otherwise, if this is leaf is full, split it in two halves. Since this
+ // node is full, it contains 2*WidthFactor values. We move the first
+ // 'WidthFactor' values to the LHS child (which we leave in this node) and
+ // move the last 'WidthFactor' values into the RHS child.
+
+ // Create the new node.
+ RopePieceBTreeLeaf *NewNode = new RopePieceBTreeLeaf();
+
+ // Move over the last 'WidthFactor' values from here to NewNode.
+ std::copy(&Pieces[WidthFactor], &Pieces[2*WidthFactor],
+ &NewNode->Pieces[0]);
+ // Replace old pieces with null RopePieces to drop refcounts.
+ std::fill(&Pieces[WidthFactor], &Pieces[2*WidthFactor], RopePiece());
+
+ // Decrease the number of values in the two nodes.
+ NewNode->NumPieces = NumPieces = WidthFactor;
+
+ // Recompute the two nodes' size.
+ NewNode->FullRecomputeSizeLocally();
+ FullRecomputeSizeLocally();
+
+ // Update the list of leaves.
+ NewNode->insertAfterLeafInOrder(this);
+
+ // These insertions can't fail.
+ if (this->size() >= Offset)
+ this->insert(Offset, R);
+ else
+ NewNode->insert(Offset - this->size(), R);
+ return NewNode;
+}
+
+/// erase - Remove NumBytes from this node at the specified offset. We are
+/// guaranteed that there is a split at Offset.
+void RopePieceBTreeLeaf::erase(unsigned Offset, unsigned NumBytes) {
+ // Since we are guaranteed that there is a split at Offset, we start by
+ // finding the Piece that starts there.
+ unsigned PieceOffs = 0;
+ unsigned i = 0;
+ for (; Offset > PieceOffs; ++i)
+ PieceOffs += getPiece(i).size();
+ assert(PieceOffs == Offset && "Split didn't occur before erase!");
+
+ unsigned StartPiece = i;
+
+ // Figure out how many pieces completely cover 'NumBytes'. We want to remove
+ // all of them.
+ for (; Offset+NumBytes > PieceOffs+getPiece(i).size(); ++i)
+ PieceOffs += getPiece(i).size();
+
+ // If we exactly include the last one, include it in the region to delete.
+ if (Offset+NumBytes == PieceOffs+getPiece(i).size())
+ PieceOffs += getPiece(i).size(), ++i;
+
+ // If we completely cover some RopePieces, erase them now.
+ if (i != StartPiece) {
+ unsigned NumDeleted = i-StartPiece;
+ for (; i != getNumPieces(); ++i)
+ Pieces[i-NumDeleted] = Pieces[i];
+
+ // Drop references to dead rope pieces.
+ std::fill(&Pieces[getNumPieces()-NumDeleted], &Pieces[getNumPieces()],
+ RopePiece());
+ NumPieces -= NumDeleted;
+
+ unsigned CoverBytes = PieceOffs-Offset;
+ NumBytes -= CoverBytes;
+ Size -= CoverBytes;
+ }
+
+ // If we completely removed some stuff, we could be done.
+ if (NumBytes == 0) return;
+
+ // Okay, now might be erasing part of some Piece. If this is the case, then
+ // move the start point of the piece.
+ assert(getPiece(StartPiece).size() > NumBytes);
+ Pieces[StartPiece].StartOffs += NumBytes;
+
+ // The size of this node just shrunk by NumBytes.
+ Size -= NumBytes;
+}
+
+//===----------------------------------------------------------------------===//
+// RopePieceBTreeInterior Class
+//===----------------------------------------------------------------------===//
+
+namespace {
+ /// RopePieceBTreeInterior - This represents an interior node in the B+Tree,
+ /// which holds up to 2*WidthFactor pointers to child nodes.
+ class RopePieceBTreeInterior : public RopePieceBTreeNode {
+ /// NumChildren - This holds the number of children currently active in the
+ /// Children array.
+ unsigned char NumChildren;
+ RopePieceBTreeNode *Children[2*WidthFactor];
+ public:
+ RopePieceBTreeInterior() : RopePieceBTreeNode(false), NumChildren(0) {}
+
+ RopePieceBTreeInterior(RopePieceBTreeNode *LHS, RopePieceBTreeNode *RHS)
+ : RopePieceBTreeNode(false) {
+ Children[0] = LHS;
+ Children[1] = RHS;
+ NumChildren = 2;
+ Size = LHS->size() + RHS->size();
+ }
+
+ ~RopePieceBTreeInterior() {
+ for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
+ Children[i]->Destroy();
+ }
+
+ bool isFull() const { return NumChildren == 2*WidthFactor; }
+
+ unsigned getNumChildren() const { return NumChildren; }
+ const RopePieceBTreeNode *getChild(unsigned i) const {
+ assert(i < NumChildren && "invalid child #");
+ return Children[i];
+ }
+ RopePieceBTreeNode *getChild(unsigned i) {
+ assert(i < NumChildren && "invalid child #");
+ return Children[i];
+ }
+
+ /// FullRecomputeSizeLocally - Recompute the Size field of this node by
+ /// summing up the sizes of the child nodes.
+ void FullRecomputeSizeLocally() {
+ Size = 0;
+ for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
+ Size += getChild(i)->size();
+ }
+
+
+ /// split - Split the range containing the specified offset so that we are
+ /// guaranteed that there is a place to do an insertion at the specified
+ /// offset. The offset is relative, so "0" is the start of the node.
+ ///
+ /// If there is no space in this subtree for the extra piece, the extra tree
+ /// node is returned and must be inserted into a parent.
+ RopePieceBTreeNode *split(unsigned Offset);
+
+
+ /// insert - Insert the specified ropepiece into this tree node at the
+ /// specified offset. The offset is relative, so "0" is the start of the
+ /// node.
+ ///
+ /// If there is no space in this subtree for the extra piece, the extra tree
+ /// node is returned and must be inserted into a parent.
+ RopePieceBTreeNode *insert(unsigned Offset, const RopePiece &R);
+
+ /// HandleChildPiece - A child propagated an insertion result up to us.
+ /// Insert the new child, and/or propagate the result further up the tree.
+ RopePieceBTreeNode *HandleChildPiece(unsigned i, RopePieceBTreeNode *RHS);
+
+ /// erase - Remove NumBytes from this node at the specified offset. We are
+ /// guaranteed that there is a split at Offset.
+ void erase(unsigned Offset, unsigned NumBytes);
+
+ //static inline bool classof(const RopePieceBTreeInterior *) { return true; }
+ static inline bool classof(const RopePieceBTreeNode *N) {
+ return !N->isLeaf();
+ }
+ };
+} // end anonymous namespace
+
+/// split - Split the range containing the specified offset so that we are
+/// guaranteed that there is a place to do an insertion at the specified
+/// offset. The offset is relative, so "0" is the start of the node.
+///
+/// If there is no space in this subtree for the extra piece, the extra tree
+/// node is returned and must be inserted into a parent.
+RopePieceBTreeNode *RopePieceBTreeInterior::split(unsigned Offset) {
+ // Figure out which child to split.
+ if (Offset == 0 || Offset == size())
+ return 0; // If we have an exact offset, we're already split.
+
+ unsigned ChildOffset = 0;
+ unsigned i = 0;
+ for (; Offset >= ChildOffset+getChild(i)->size(); ++i)
+ ChildOffset += getChild(i)->size();
+
+ // If already split there, we're done.
+ if (ChildOffset == Offset)
+ return 0;
+
+ // Otherwise, recursively split the child.
+ if (RopePieceBTreeNode *RHS = getChild(i)->split(Offset-ChildOffset))
+ return HandleChildPiece(i, RHS);
+ return 0; // Done!
+}
+
+/// insert - Insert the specified ropepiece into this tree node at the
+/// specified offset. The offset is relative, so "0" is the start of the
+/// node.
+///
+/// If there is no space in this subtree for the extra piece, the extra tree
+/// node is returned and must be inserted into a parent.
+RopePieceBTreeNode *RopePieceBTreeInterior::insert(unsigned Offset,
+ const RopePiece &R) {
+ // Find the insertion point. We are guaranteed that there is a split at the
+ // specified offset so find it.
+ unsigned i = 0, e = getNumChildren();
+
+ unsigned ChildOffs = 0;
+ if (Offset == size()) {
+ // Fastpath for a common case. Insert at end of last child.
+ i = e-1;
+ ChildOffs = size()-getChild(i)->size();
+ } else {
+ for (; Offset > ChildOffs+getChild(i)->size(); ++i)
+ ChildOffs += getChild(i)->size();
+ }
+
+ Size += R.size();
+
+ // Insert at the end of this child.
+ if (RopePieceBTreeNode *RHS = getChild(i)->insert(Offset-ChildOffs, R))
+ return HandleChildPiece(i, RHS);
+
+ return 0;
+}
+
+/// HandleChildPiece - A child propagated an insertion result up to us.
+/// Insert the new child, and/or propagate the result further up the tree.
+RopePieceBTreeNode *
+RopePieceBTreeInterior::HandleChildPiece(unsigned i, RopePieceBTreeNode *RHS) {
+ // Otherwise the child propagated a subtree up to us as a new child. See if
+ // we have space for it here.
+ if (!isFull()) {
+ // Insert RHS after child 'i'.
+ if (i + 1 != getNumChildren())
+ memmove(&Children[i+2], &Children[i+1],
+ (getNumChildren()-i-1)*sizeof(Children[0]));
+ Children[i+1] = RHS;
+ ++NumChildren;
+ return 0;
+ }
+
+ // Okay, this node is full. Split it in half, moving WidthFactor children to
+ // a newly allocated interior node.
+
+ // Create the new node.
+ RopePieceBTreeInterior *NewNode = new RopePieceBTreeInterior();
+
+ // Move over the last 'WidthFactor' values from here to NewNode.
+ memcpy(&NewNode->Children[0], &Children[WidthFactor],
+ WidthFactor*sizeof(Children[0]));
+
+ // Decrease the number of values in the two nodes.
+ NewNode->NumChildren = NumChildren = WidthFactor;
+
+ // Finally, insert the two new children in the side the can (now) hold them.
+ // These insertions can't fail.
+ if (i < WidthFactor)
+ this->HandleChildPiece(i, RHS);
+ else
+ NewNode->HandleChildPiece(i-WidthFactor, RHS);
+
+ // Recompute the two nodes' size.
+ NewNode->FullRecomputeSizeLocally();
+ FullRecomputeSizeLocally();
+ return NewNode;
+}
+
+/// erase - Remove NumBytes from this node at the specified offset. We are
+/// guaranteed that there is a split at Offset.
+void RopePieceBTreeInterior::erase(unsigned Offset, unsigned NumBytes) {
+ // This will shrink this node by NumBytes.
+ Size -= NumBytes;
+
+ // Find the first child that overlaps with Offset.
+ unsigned i = 0;
+ for (; Offset >= getChild(i)->size(); ++i)
+ Offset -= getChild(i)->size();
+
+ // Propagate the delete request into overlapping children, or completely
+ // delete the children as appropriate.
+ while (NumBytes) {
+ RopePieceBTreeNode *CurChild = getChild(i);
+
+ // If we are deleting something contained entirely in the child, pass on the
+ // request.
+ if (Offset+NumBytes < CurChild->size()) {
+ CurChild->erase(Offset, NumBytes);
+ return;
+ }
+
+ // If this deletion request starts somewhere in the middle of the child, it
+ // must be deleting to the end of the child.
+ if (Offset) {
+ unsigned BytesFromChild = CurChild->size()-Offset;
+ CurChild->erase(Offset, BytesFromChild);
+ NumBytes -= BytesFromChild;
+ // Start at the beginning of the next child.
+ Offset = 0;
+ ++i;
+ continue;
+ }
+
+ // If the deletion request completely covers the child, delete it and move
+ // the rest down.
+ NumBytes -= CurChild->size();
+ CurChild->Destroy();
+ --NumChildren;
+ if (i != getNumChildren())
+ memmove(&Children[i], &Children[i+1],
+ (getNumChildren()-i)*sizeof(Children[0]));
+ }
+}
+
+//===----------------------------------------------------------------------===//
+// RopePieceBTreeNode Implementation
+//===----------------------------------------------------------------------===//
+
+void RopePieceBTreeNode::Destroy() {
+ if (RopePieceBTreeLeaf *Leaf = dyn_cast<RopePieceBTreeLeaf>(this))
+ delete Leaf;
+ else
+ delete cast<RopePieceBTreeInterior>(this);
+}
+
+/// split - Split the range containing the specified offset so that we are
+/// guaranteed that there is a place to do an insertion at the specified
+/// offset. The offset is relative, so "0" is the start of the node.
+///
+/// If there is no space in this subtree for the extra piece, the extra tree
+/// node is returned and must be inserted into a parent.
+RopePieceBTreeNode *RopePieceBTreeNode::split(unsigned Offset) {
+ assert(Offset <= size() && "Invalid offset to split!");
+ if (RopePieceBTreeLeaf *Leaf = dyn_cast<RopePieceBTreeLeaf>(this))
+ return Leaf->split(Offset);
+ return cast<RopePieceBTreeInterior>(this)->split(Offset);
+}
+
+/// insert - Insert the specified ropepiece into this tree node at the
+/// specified offset. The offset is relative, so "0" is the start of the
+/// node.
+///
+/// If there is no space in this subtree for the extra piece, the extra tree
+/// node is returned and must be inserted into a parent.
+RopePieceBTreeNode *RopePieceBTreeNode::insert(unsigned Offset,
+ const RopePiece &R) {
+ assert(Offset <= size() && "Invalid offset to insert!");
+ if (RopePieceBTreeLeaf *Leaf = dyn_cast<RopePieceBTreeLeaf>(this))
+ return Leaf->insert(Offset, R);
+ return cast<RopePieceBTreeInterior>(this)->insert(Offset, R);
+}
+
+/// erase - Remove NumBytes from this node at the specified offset. We are
+/// guaranteed that there is a split at Offset.
+void RopePieceBTreeNode::erase(unsigned Offset, unsigned NumBytes) {
+ assert(Offset+NumBytes <= size() && "Invalid offset to erase!");
+ if (RopePieceBTreeLeaf *Leaf = dyn_cast<RopePieceBTreeLeaf>(this))
+ return Leaf->erase(Offset, NumBytes);
+ return cast<RopePieceBTreeInterior>(this)->erase(Offset, NumBytes);
+}
+
+
+//===----------------------------------------------------------------------===//
+// RopePieceBTreeIterator Implementation
+//===----------------------------------------------------------------------===//
+
+static const RopePieceBTreeLeaf *getCN(const void *P) {
+ return static_cast<const RopePieceBTreeLeaf*>(P);
+}
+
+// begin iterator.
+RopePieceBTreeIterator::RopePieceBTreeIterator(const void *n) {
+ const RopePieceBTreeNode *N = static_cast<const RopePieceBTreeNode*>(n);
+
+ // Walk down the left side of the tree until we get to a leaf.
+ while (const RopePieceBTreeInterior *IN = dyn_cast<RopePieceBTreeInterior>(N))
+ N = IN->getChild(0);
+
+ // We must have at least one leaf.
+ CurNode = cast<RopePieceBTreeLeaf>(N);
+
+ // If we found a leaf that happens to be empty, skip over it until we get
+ // to something full.
+ while (CurNode && getCN(CurNode)->getNumPieces() == 0)
+ CurNode = getCN(CurNode)->getNextLeafInOrder();
+
+ if (CurNode != 0)
+ CurPiece = &getCN(CurNode)->getPiece(0);
+ else // Empty tree, this is an end() iterator.
+ CurPiece = 0;
+ CurChar = 0;
+}
+
+void RopePieceBTreeIterator::MoveToNextPiece() {
+ if (CurPiece != &getCN(CurNode)->getPiece(getCN(CurNode)->getNumPieces()-1)) {
+ CurChar = 0;
+ ++CurPiece;
+ return;
+ }
+
+ // Find the next non-empty leaf node.
+ do
+ CurNode = getCN(CurNode)->getNextLeafInOrder();
+ while (CurNode && getCN(CurNode)->getNumPieces() == 0);
+
+ if (CurNode != 0)
+ CurPiece = &getCN(CurNode)->getPiece(0);
+ else // Hit end().
+ CurPiece = 0;
+ CurChar = 0;
+}
+
+//===----------------------------------------------------------------------===//
+// RopePieceBTree Implementation
+//===----------------------------------------------------------------------===//
+
+static RopePieceBTreeNode *getRoot(void *P) {
+ return static_cast<RopePieceBTreeNode*>(P);
+}
+
+RopePieceBTree::RopePieceBTree() {
+ Root = new RopePieceBTreeLeaf();
+}
+RopePieceBTree::RopePieceBTree(const RopePieceBTree &RHS) {
+ assert(RHS.empty() && "Can't copy non-empty tree yet");
+ Root = new RopePieceBTreeLeaf();
+}
+RopePieceBTree::~RopePieceBTree() {
+ getRoot(Root)->Destroy();
+}
+
+unsigned RopePieceBTree::size() const {
+ return getRoot(Root)->size();
+}
+
+void RopePieceBTree::clear() {
+ if (RopePieceBTreeLeaf *Leaf = dyn_cast<RopePieceBTreeLeaf>(getRoot(Root)))
+ Leaf->clear();
+ else {
+ getRoot(Root)->Destroy();
+ Root = new RopePieceBTreeLeaf();
+ }
+}
+
+void RopePieceBTree::insert(unsigned Offset, const RopePiece &R) {
+ // #1. Split at Offset.
+ if (RopePieceBTreeNode *RHS = getRoot(Root)->split(Offset))
+ Root = new RopePieceBTreeInterior(getRoot(Root), RHS);
+
+ // #2. Do the insertion.
+ if (RopePieceBTreeNode *RHS = getRoot(Root)->insert(Offset, R))
+ Root = new RopePieceBTreeInterior(getRoot(Root), RHS);
+}
+
+void RopePieceBTree::erase(unsigned Offset, unsigned NumBytes) {
+ // #1. Split at Offset.
+ if (RopePieceBTreeNode *RHS = getRoot(Root)->split(Offset))
+ Root = new RopePieceBTreeInterior(getRoot(Root), RHS);
+
+ // #2. Do the erasing.
+ getRoot(Root)->erase(Offset, NumBytes);
+}
+
+//===----------------------------------------------------------------------===//
+// RewriteRope Implementation
+//===----------------------------------------------------------------------===//
+
+/// MakeRopeString - This copies the specified byte range into some instance of
+/// RopeRefCountString, and return a RopePiece that represents it. This uses
+/// the AllocBuffer object to aggregate requests for small strings into one
+/// allocation instead of doing tons of tiny allocations.
+RopePiece RewriteRope::MakeRopeString(const char *Start, const char *End) {
+ unsigned Len = End-Start;
+ assert(Len && "Zero length RopePiece is invalid!");
+
+ // If we have space for this string in the current alloc buffer, use it.
+ if (AllocOffs+Len <= AllocChunkSize) {
+ memcpy(AllocBuffer->Data+AllocOffs, Start, Len);
+ AllocOffs += Len;
+ return RopePiece(AllocBuffer, AllocOffs-Len, AllocOffs);
+ }
+
+ // If we don't have enough room because this specific allocation is huge,
+ // just allocate a new rope piece for it alone.
+ if (Len > AllocChunkSize) {
+ unsigned Size = End-Start+sizeof(RopeRefCountString)-1;
+ RopeRefCountString *Res =
+ reinterpret_cast<RopeRefCountString *>(new char[Size]);
+ Res->RefCount = 0;
+ memcpy(Res->Data, Start, End-Start);
+ return RopePiece(Res, 0, End-Start);
+ }
+
+ // Otherwise, this was a small request but we just don't have space for it
+ // Make a new chunk and share it with later allocations.
+
+ // If we had an old allocation, drop our reference to it.
+ if (AllocBuffer && --AllocBuffer->RefCount == 0)
+ delete [] (char*)AllocBuffer;
+
+ unsigned AllocSize = offsetof(RopeRefCountString, Data) + AllocChunkSize;
+ AllocBuffer = reinterpret_cast<RopeRefCountString *>(new char[AllocSize]);
+ AllocBuffer->RefCount = 0;
+ memcpy(AllocBuffer->Data, Start, Len);
+ AllocOffs = Len;
+
+ // Start out the new allocation with a refcount of 1, since we have an
+ // internal reference to it.
+ AllocBuffer->addRef();
+ return RopePiece(AllocBuffer, 0, Len);
+}
+
+
diff --git a/clang/lib/Rewrite/RewriteTest.cpp b/clang/lib/Rewrite/RewriteTest.cpp
new file mode 100644
index 0000000..019e5e7
--- /dev/null
+++ b/clang/lib/Rewrite/RewriteTest.cpp
@@ -0,0 +1,39 @@
+//===--- RewriteTest.cpp - Rewriter playground ----------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This is a testbed.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/Rewriters.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Rewrite/TokenRewriter.h"
+#include "llvm/Support/raw_ostream.h"
+
+void clang::DoRewriteTest(Preprocessor &PP, raw_ostream* OS) {
+ SourceManager &SM = PP.getSourceManager();
+ const LangOptions &LangOpts = PP.getLangOpts();
+
+ TokenRewriter Rewriter(SM.getMainFileID(), SM, LangOpts);
+
+ // Throw <i> </i> tags around comments.
+ for (TokenRewriter::token_iterator I = Rewriter.token_begin(),
+ E = Rewriter.token_end(); I != E; ++I) {
+ if (I->isNot(tok::comment)) continue;
+
+ Rewriter.AddTokenBefore(I, "<i>");
+ Rewriter.AddTokenAfter(I, "</i>");
+ }
+
+
+ // Print out the output.
+ for (TokenRewriter::token_iterator I = Rewriter.token_begin(),
+ E = Rewriter.token_end(); I != E; ++I)
+ *OS << PP.getSpelling(*I);
+}
diff --git a/clang/lib/Rewrite/Rewriter.cpp b/clang/lib/Rewrite/Rewriter.cpp
new file mode 100644
index 0000000..43fb01b
--- /dev/null
+++ b/clang/lib/Rewrite/Rewriter.cpp
@@ -0,0 +1,414 @@
+//===--- Rewriter.cpp - Code rewriting interface --------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the Rewriter class, which is used for code
+// transformations.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/Rewriter.h"
+#include "clang/AST/Stmt.h"
+#include "clang/AST/Decl.h"
+#include "clang/Lex/Lexer.h"
+#include "clang/Basic/SourceManager.h"
+#include "llvm/ADT/SmallString.h"
+using namespace clang;
+
+raw_ostream &RewriteBuffer::write(raw_ostream &os) const {
+ // FIXME: eliminate the copy by writing out each chunk at a time
+ os << std::string(begin(), end());
+ return os;
+}
+
+/// \brief Return true if this character is non-new-line whitespace:
+/// ' ', '\t', '\f', '\v', '\r'.
+static inline bool isWhitespace(unsigned char c) {
+ switch (c) {
+ case ' ':
+ case '\t':
+ case '\f':
+ case '\v':
+ case '\r':
+ return true;
+ default:
+ return false;
+ }
+}
+
+void RewriteBuffer::RemoveText(unsigned OrigOffset, unsigned Size,
+ bool removeLineIfEmpty) {
+ // Nothing to remove, exit early.
+ if (Size == 0) return;
+
+ unsigned RealOffset = getMappedOffset(OrigOffset, true);
+ assert(RealOffset+Size < Buffer.size() && "Invalid location");
+
+ // Remove the dead characters.
+ Buffer.erase(RealOffset, Size);
+
+ // Add a delta so that future changes are offset correctly.
+ AddReplaceDelta(OrigOffset, -Size);
+
+ if (removeLineIfEmpty) {
+ // Find the line that the remove occurred and if it is completely empty
+ // remove the line as well.
+
+ iterator curLineStart = begin();
+ unsigned curLineStartOffs = 0;
+ iterator posI = begin();
+ for (unsigned i = 0; i != RealOffset; ++i) {
+ if (*posI == '\n') {
+ curLineStart = posI;
+ ++curLineStart;
+ curLineStartOffs = i + 1;
+ }
+ ++posI;
+ }
+
+ unsigned lineSize = 0;
+ posI = curLineStart;
+ while (posI != end() && isWhitespace(*posI)) {
+ ++posI;
+ ++lineSize;
+ }
+ if (posI != end() && *posI == '\n') {
+ Buffer.erase(curLineStartOffs, lineSize + 1/* + '\n'*/);
+ AddReplaceDelta(curLineStartOffs, -(lineSize + 1/* + '\n'*/));
+ }
+ }
+}
+
+void RewriteBuffer::InsertText(unsigned OrigOffset, StringRef Str,
+ bool InsertAfter) {
+
+ // Nothing to insert, exit early.
+ if (Str.empty()) return;
+
+ unsigned RealOffset = getMappedOffset(OrigOffset, InsertAfter);
+ Buffer.insert(RealOffset, Str.begin(), Str.end());
+
+ // Add a delta so that future changes are offset correctly.
+ AddInsertDelta(OrigOffset, Str.size());
+}
+
+/// ReplaceText - This method replaces a range of characters in the input
+/// buffer with a new string. This is effectively a combined "remove+insert"
+/// operation.
+void RewriteBuffer::ReplaceText(unsigned OrigOffset, unsigned OrigLength,
+ StringRef NewStr) {
+ unsigned RealOffset = getMappedOffset(OrigOffset, true);
+ Buffer.erase(RealOffset, OrigLength);
+ Buffer.insert(RealOffset, NewStr.begin(), NewStr.end());
+ if (OrigLength != NewStr.size())
+ AddReplaceDelta(OrigOffset, NewStr.size() - OrigLength);
+}
+
+
+//===----------------------------------------------------------------------===//
+// Rewriter class
+//===----------------------------------------------------------------------===//
+
+/// getRangeSize - Return the size in bytes of the specified range if they
+/// are in the same file. If not, this returns -1.
+int Rewriter::getRangeSize(const CharSourceRange &Range,
+ RewriteOptions opts) const {
+ if (!isRewritable(Range.getBegin()) ||
+ !isRewritable(Range.getEnd())) return -1;
+
+ FileID StartFileID, EndFileID;
+ unsigned StartOff, EndOff;
+
+ StartOff = getLocationOffsetAndFileID(Range.getBegin(), StartFileID);
+ EndOff = getLocationOffsetAndFileID(Range.getEnd(), EndFileID);
+
+ if (StartFileID != EndFileID)
+ return -1;
+
+ // If edits have been made to this buffer, the delta between the range may
+ // have changed.
+ std::map<FileID, RewriteBuffer>::const_iterator I =
+ RewriteBuffers.find(StartFileID);
+ if (I != RewriteBuffers.end()) {
+ const RewriteBuffer &RB = I->second;
+ EndOff = RB.getMappedOffset(EndOff, opts.IncludeInsertsAtEndOfRange);
+ StartOff = RB.getMappedOffset(StartOff, !opts.IncludeInsertsAtBeginOfRange);
+ }
+
+
+ // Adjust the end offset to the end of the last token, instead of being the
+ // start of the last token if this is a token range.
+ if (Range.isTokenRange())
+ EndOff += Lexer::MeasureTokenLength(Range.getEnd(), *SourceMgr, *LangOpts);
+
+ return EndOff-StartOff;
+}
+
+int Rewriter::getRangeSize(SourceRange Range, RewriteOptions opts) const {
+ return getRangeSize(CharSourceRange::getTokenRange(Range), opts);
+}
+
+
+/// getRewrittenText - Return the rewritten form of the text in the specified
+/// range. If the start or end of the range was unrewritable or if they are
+/// in different buffers, this returns an empty string.
+///
+/// Note that this method is not particularly efficient.
+///
+std::string Rewriter::getRewrittenText(SourceRange Range) const {
+ if (!isRewritable(Range.getBegin()) ||
+ !isRewritable(Range.getEnd()))
+ return "";
+
+ FileID StartFileID, EndFileID;
+ unsigned StartOff, EndOff;
+ StartOff = getLocationOffsetAndFileID(Range.getBegin(), StartFileID);
+ EndOff = getLocationOffsetAndFileID(Range.getEnd(), EndFileID);
+
+ if (StartFileID != EndFileID)
+ return ""; // Start and end in different buffers.
+
+ // If edits have been made to this buffer, the delta between the range may
+ // have changed.
+ std::map<FileID, RewriteBuffer>::const_iterator I =
+ RewriteBuffers.find(StartFileID);
+ if (I == RewriteBuffers.end()) {
+ // If the buffer hasn't been rewritten, just return the text from the input.
+ const char *Ptr = SourceMgr->getCharacterData(Range.getBegin());
+
+ // Adjust the end offset to the end of the last token, instead of being the
+ // start of the last token.
+ EndOff += Lexer::MeasureTokenLength(Range.getEnd(), *SourceMgr, *LangOpts);
+ return std::string(Ptr, Ptr+EndOff-StartOff);
+ }
+
+ const RewriteBuffer &RB = I->second;
+ EndOff = RB.getMappedOffset(EndOff, true);
+ StartOff = RB.getMappedOffset(StartOff);
+
+ // Adjust the end offset to the end of the last token, instead of being the
+ // start of the last token.
+ EndOff += Lexer::MeasureTokenLength(Range.getEnd(), *SourceMgr, *LangOpts);
+
+ // Advance the iterators to the right spot, yay for linear time algorithms.
+ RewriteBuffer::iterator Start = RB.begin();
+ std::advance(Start, StartOff);
+ RewriteBuffer::iterator End = Start;
+ std::advance(End, EndOff-StartOff);
+
+ return std::string(Start, End);
+}
+
+unsigned Rewriter::getLocationOffsetAndFileID(SourceLocation Loc,
+ FileID &FID) const {
+ assert(Loc.isValid() && "Invalid location");
+ std::pair<FileID,unsigned> V = SourceMgr->getDecomposedLoc(Loc);
+ FID = V.first;
+ return V.second;
+}
+
+
+/// getEditBuffer - Get or create a RewriteBuffer for the specified FileID.
+///
+RewriteBuffer &Rewriter::getEditBuffer(FileID FID) {
+ std::map<FileID, RewriteBuffer>::iterator I =
+ RewriteBuffers.lower_bound(FID);
+ if (I != RewriteBuffers.end() && I->first == FID)
+ return I->second;
+ I = RewriteBuffers.insert(I, std::make_pair(FID, RewriteBuffer()));
+
+ StringRef MB = SourceMgr->getBufferData(FID);
+ I->second.Initialize(MB.begin(), MB.end());
+
+ return I->second;
+}
+
+/// InsertText - Insert the specified string at the specified location in the
+/// original buffer.
+bool Rewriter::InsertText(SourceLocation Loc, StringRef Str,
+ bool InsertAfter, bool indentNewLines) {
+ if (!isRewritable(Loc)) return true;
+ FileID FID;
+ unsigned StartOffs = getLocationOffsetAndFileID(Loc, FID);
+
+ SmallString<128> indentedStr;
+ if (indentNewLines && Str.find('\n') != StringRef::npos) {
+ StringRef MB = SourceMgr->getBufferData(FID);
+
+ unsigned lineNo = SourceMgr->getLineNumber(FID, StartOffs) - 1;
+ const SrcMgr::ContentCache *
+ Content = SourceMgr->getSLocEntry(FID).getFile().getContentCache();
+ unsigned lineOffs = Content->SourceLineCache[lineNo];
+
+ // Find the whitespace at the start of the line.
+ StringRef indentSpace;
+ {
+ unsigned i = lineOffs;
+ while (isWhitespace(MB[i]))
+ ++i;
+ indentSpace = MB.substr(lineOffs, i-lineOffs);
+ }
+
+ SmallVector<StringRef, 4> lines;
+ Str.split(lines, "\n");
+
+ for (unsigned i = 0, e = lines.size(); i != e; ++i) {
+ indentedStr += lines[i];
+ if (i < e-1) {
+ indentedStr += '\n';
+ indentedStr += indentSpace;
+ }
+ }
+ Str = indentedStr.str();
+ }
+
+ getEditBuffer(FID).InsertText(StartOffs, Str, InsertAfter);
+ return false;
+}
+
+bool Rewriter::InsertTextAfterToken(SourceLocation Loc, StringRef Str) {
+ if (!isRewritable(Loc)) return true;
+ FileID FID;
+ unsigned StartOffs = getLocationOffsetAndFileID(Loc, FID);
+ RewriteOptions rangeOpts;
+ rangeOpts.IncludeInsertsAtBeginOfRange = false;
+ StartOffs += getRangeSize(SourceRange(Loc, Loc), rangeOpts);
+ getEditBuffer(FID).InsertText(StartOffs, Str, /*InsertAfter*/true);
+ return false;
+}
+
+/// RemoveText - Remove the specified text region.
+bool Rewriter::RemoveText(SourceLocation Start, unsigned Length,
+ RewriteOptions opts) {
+ if (!isRewritable(Start)) return true;
+ FileID FID;
+ unsigned StartOffs = getLocationOffsetAndFileID(Start, FID);
+ getEditBuffer(FID).RemoveText(StartOffs, Length, opts.RemoveLineIfEmpty);
+ return false;
+}
+
+/// ReplaceText - This method replaces a range of characters in the input
+/// buffer with a new string. This is effectively a combined "remove/insert"
+/// operation.
+bool Rewriter::ReplaceText(SourceLocation Start, unsigned OrigLength,
+ StringRef NewStr) {
+ if (!isRewritable(Start)) return true;
+ FileID StartFileID;
+ unsigned StartOffs = getLocationOffsetAndFileID(Start, StartFileID);
+
+ getEditBuffer(StartFileID).ReplaceText(StartOffs, OrigLength, NewStr);
+ return false;
+}
+
+bool Rewriter::ReplaceText(SourceRange range, SourceRange replacementRange) {
+ if (!isRewritable(range.getBegin())) return true;
+ if (!isRewritable(range.getEnd())) return true;
+ if (replacementRange.isInvalid()) return true;
+ SourceLocation start = range.getBegin();
+ unsigned origLength = getRangeSize(range);
+ unsigned newLength = getRangeSize(replacementRange);
+ FileID FID;
+ unsigned newOffs = getLocationOffsetAndFileID(replacementRange.getBegin(),
+ FID);
+ StringRef MB = SourceMgr->getBufferData(FID);
+ return ReplaceText(start, origLength, MB.substr(newOffs, newLength));
+}
+
+/// ReplaceStmt - This replaces a Stmt/Expr with another, using the pretty
+/// printer to generate the replacement code. This returns true if the input
+/// could not be rewritten, or false if successful.
+bool Rewriter::ReplaceStmt(Stmt *From, Stmt *To) {
+ // Measaure the old text.
+ int Size = getRangeSize(From->getSourceRange());
+ if (Size == -1)
+ return true;
+
+ // Get the new text.
+ std::string SStr;
+ llvm::raw_string_ostream S(SStr);
+ To->printPretty(S, 0, PrintingPolicy(*LangOpts));
+ const std::string &Str = S.str();
+
+ ReplaceText(From->getLocStart(), Size, Str);
+ return false;
+}
+
+std::string Rewriter::ConvertToString(Stmt *From) {
+ std::string SStr;
+ llvm::raw_string_ostream S(SStr);
+ From->printPretty(S, 0, PrintingPolicy(*LangOpts));
+ return S.str();
+}
+
+bool Rewriter::IncreaseIndentation(CharSourceRange range,
+ SourceLocation parentIndent) {
+ if (range.isInvalid()) return true;
+ if (!isRewritable(range.getBegin())) return true;
+ if (!isRewritable(range.getEnd())) return true;
+ if (!isRewritable(parentIndent)) return true;
+
+ FileID StartFileID, EndFileID, parentFileID;
+ unsigned StartOff, EndOff, parentOff;
+
+ StartOff = getLocationOffsetAndFileID(range.getBegin(), StartFileID);
+ EndOff = getLocationOffsetAndFileID(range.getEnd(), EndFileID);
+ parentOff = getLocationOffsetAndFileID(parentIndent, parentFileID);
+
+ if (StartFileID != EndFileID || StartFileID != parentFileID)
+ return true;
+ if (StartOff > EndOff)
+ return true;
+
+ FileID FID = StartFileID;
+ StringRef MB = SourceMgr->getBufferData(FID);
+
+ unsigned parentLineNo = SourceMgr->getLineNumber(FID, parentOff) - 1;
+ unsigned startLineNo = SourceMgr->getLineNumber(FID, StartOff) - 1;
+ unsigned endLineNo = SourceMgr->getLineNumber(FID, EndOff) - 1;
+
+ const SrcMgr::ContentCache *
+ Content = SourceMgr->getSLocEntry(FID).getFile().getContentCache();
+
+ // Find where the lines start.
+ unsigned parentLineOffs = Content->SourceLineCache[parentLineNo];
+ unsigned startLineOffs = Content->SourceLineCache[startLineNo];
+
+ // Find the whitespace at the start of each line.
+ StringRef parentSpace, startSpace;
+ {
+ unsigned i = parentLineOffs;
+ while (isWhitespace(MB[i]))
+ ++i;
+ parentSpace = MB.substr(parentLineOffs, i-parentLineOffs);
+
+ i = startLineOffs;
+ while (isWhitespace(MB[i]))
+ ++i;
+ startSpace = MB.substr(startLineOffs, i-startLineOffs);
+ }
+ if (parentSpace.size() >= startSpace.size())
+ return true;
+ if (!startSpace.startswith(parentSpace))
+ return true;
+
+ StringRef indent = startSpace.substr(parentSpace.size());
+
+ // Indent the lines between start/end offsets.
+ RewriteBuffer &RB = getEditBuffer(FID);
+ for (unsigned lineNo = startLineNo; lineNo <= endLineNo; ++lineNo) {
+ unsigned offs = Content->SourceLineCache[lineNo];
+ unsigned i = offs;
+ while (isWhitespace(MB[i]))
+ ++i;
+ StringRef origIndent = MB.substr(offs, i-offs);
+ if (origIndent.startswith(startSpace))
+ RB.InsertText(offs, indent, /*InsertAfter=*/false);
+ }
+
+ return false;
+}
diff --git a/clang/lib/Rewrite/TokenRewriter.cpp b/clang/lib/Rewrite/TokenRewriter.cpp
new file mode 100644
index 0000000..03ce63e
--- /dev/null
+++ b/clang/lib/Rewrite/TokenRewriter.cpp
@@ -0,0 +1,99 @@
+//===--- TokenRewriter.cpp - Token-based code rewriting interface ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the TokenRewriter class, which is used for code
+// transformations.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/TokenRewriter.h"
+#include "clang/Lex/Lexer.h"
+#include "clang/Lex/ScratchBuffer.h"
+#include "clang/Basic/SourceManager.h"
+using namespace clang;
+
+TokenRewriter::TokenRewriter(FileID FID, SourceManager &SM,
+ const LangOptions &LangOpts) {
+ ScratchBuf.reset(new ScratchBuffer(SM));
+
+ // Create a lexer to lex all the tokens of the main file in raw mode.
+ const llvm::MemoryBuffer *FromFile = SM.getBuffer(FID);
+ Lexer RawLex(FID, FromFile, SM, LangOpts);
+
+ // Return all comments and whitespace as tokens.
+ RawLex.SetKeepWhitespaceMode(true);
+
+ // Lex the file, populating our datastructures.
+ Token RawTok;
+ RawLex.LexFromRawLexer(RawTok);
+ while (RawTok.isNot(tok::eof)) {
+#if 0
+ if (Tok.is(tok::raw_identifier)) {
+ // Look up the identifier info for the token. This should use
+ // IdentifierTable directly instead of PP.
+ PP.LookUpIdentifierInfo(Tok);
+ }
+#endif
+
+ AddToken(RawTok, TokenList.end());
+ RawLex.LexFromRawLexer(RawTok);
+ }
+}
+
+TokenRewriter::~TokenRewriter() {
+}
+
+
+/// RemapIterator - Convert from token_iterator (a const iterator) to
+/// TokenRefTy (a non-const iterator).
+TokenRewriter::TokenRefTy TokenRewriter::RemapIterator(token_iterator I) {
+ if (I == token_end()) return TokenList.end();
+
+ // FIXME: This is horrible, we should use our own list or something to avoid
+ // this.
+ std::map<SourceLocation, TokenRefTy>::iterator MapIt =
+ TokenAtLoc.find(I->getLocation());
+ assert(MapIt != TokenAtLoc.end() && "iterator not in rewriter?");
+ return MapIt->second;
+}
+
+
+/// AddToken - Add the specified token into the Rewriter before the other
+/// position.
+TokenRewriter::TokenRefTy
+TokenRewriter::AddToken(const Token &T, TokenRefTy Where) {
+ Where = TokenList.insert(Where, T);
+
+ bool InsertSuccess = TokenAtLoc.insert(std::make_pair(T.getLocation(),
+ Where)).second;
+ assert(InsertSuccess && "Token location already in rewriter!");
+ (void)InsertSuccess;
+ return Where;
+}
+
+
+TokenRewriter::token_iterator
+TokenRewriter::AddTokenBefore(token_iterator I, const char *Val) {
+ unsigned Len = strlen(Val);
+
+ // Plop the string into the scratch buffer, then create a token for this
+ // string.
+ Token Tok;
+ Tok.startToken();
+ const char *Spelling;
+ Tok.setLocation(ScratchBuf->getToken(Val, Len, Spelling));
+ Tok.setLength(Len);
+
+ // TODO: Form a whole lexer around this and relex the token! For now, just
+ // set kind to tok::unknown.
+ Tok.setKind(tok::unknown);
+
+ return AddToken(Tok, RemapIterator(I));
+}
+
generated by cgit v1.2.3 (git 2.46.2) at 2024-11-10 06:59:45 +0000