1 files changed, 229 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CGBlocks.h b/clang/lib/CodeGen/CGBlocks.h
new file mode 100644
index 0000000..095cfdb
--- /dev/null
+++ b/clang/lib/CodeGen/CGBlocks.h
@@ -0,0 +1,229 @@
+//===-- CGBlocks.h - state for LLVM CodeGen for blocks ----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This is the internal state used for llvm translation for block literals.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CLANG_CODEGEN_CGBLOCKS_H
+#define CLANG_CODEGEN_CGBLOCKS_H
+
+#include "CodeGenTypes.h"
+#include "clang/AST/Type.h"
+#include "llvm/Module.h"
+#include "clang/Basic/TargetInfo.h"
+#include "clang/AST/CharUnits.h"
+#include "clang/AST/Expr.h"
+#include "clang/AST/ExprCXX.h"
+#include "clang/AST/ExprObjC.h"
+
+#include "CodeGenFunction.h"
+#include "CGBuilder.h"
+#include "CGCall.h"
+#include "CGValue.h"
+
+namespace llvm {
+  class Module;
+  class Constant;
+  class Function;
+  class GlobalValue;
+  class TargetData;
+  class FunctionType;
+  class PointerType;
+  class Value;
+  class LLVMContext;
+}
+
+namespace clang {
+
+namespace CodeGen {
+
+class CodeGenModule;
+class CGBlockInfo;
+
+enum BlockFlag_t {
+  BLOCK_HAS_COPY_DISPOSE =  (1 << 25),
+  BLOCK_HAS_CXX_OBJ =       (1 << 26),
+  BLOCK_IS_GLOBAL =         (1 << 28),
+  BLOCK_USE_STRET =         (1 << 29),
+  BLOCK_HAS_SIGNATURE  =    (1 << 30)
+};
+class BlockFlags {
+  uint32_t flags;
+
+  BlockFlags(uint32_t flags) : flags(flags) {}
+public:
+  BlockFlags() : flags(0) {}
+  BlockFlags(BlockFlag_t flag) : flags(flag) {}
+
+  uint32_t getBitMask() const { return flags; }
+  bool empty() const { return flags == 0; }
+
+  friend BlockFlags operator|(BlockFlags l, BlockFlags r) {
+    return BlockFlags(l.flags | r.flags);
+  }
+  friend BlockFlags &operator|=(BlockFlags &l, BlockFlags r) {
+    l.flags |= r.flags;
+    return l;
+  }
+  friend bool operator&(BlockFlags l, BlockFlags r) {
+    return (l.flags & r.flags);
+  }
+};
+inline BlockFlags operator|(BlockFlag_t l, BlockFlag_t r) {
+  return BlockFlags(l) | BlockFlags(r);
+}
+
+enum BlockFieldFlag_t {
+  BLOCK_FIELD_IS_OBJECT   = 0x03,  /* id, NSObject, __attribute__((NSObject)),
+                                    block, ... */
+  BLOCK_FIELD_IS_BLOCK    = 0x07,  /* a block variable */
+
+  BLOCK_FIELD_IS_BYREF    = 0x08,  /* the on stack structure holding the __block
+                                    variable */
+  BLOCK_FIELD_IS_WEAK     = 0x10,  /* declared __weak, only used in byref copy
+                                    helpers */
+  BLOCK_FIELD_IS_ARC      = 0x40,  /* field has ARC-specific semantics */
+  BLOCK_BYREF_CALLER      = 128,   /* called from __block (byref) copy/dispose
+                                      support routines */
+  BLOCK_BYREF_CURRENT_MAX = 256
+};
+
+class BlockFieldFlags {
+  uint32_t flags;
+
+  BlockFieldFlags(uint32_t flags) : flags(flags) {}
+public:
+  BlockFieldFlags() : flags(0) {}
+  BlockFieldFlags(BlockFieldFlag_t flag) : flags(flag) {}
+
+  uint32_t getBitMask() const { return flags; }
+  bool empty() const { return flags == 0; }
+
+  /// Answers whether the flags indicate that this field is an object
+  /// or block pointer that requires _Block_object_assign/dispose.
+  bool isSpecialPointer() const { return flags & BLOCK_FIELD_IS_OBJECT; }
+
+  friend BlockFieldFlags operator|(BlockFieldFlags l, BlockFieldFlags r) {
+    return BlockFieldFlags(l.flags | r.flags);
+  }
+  friend BlockFieldFlags &operator|=(BlockFieldFlags &l, BlockFieldFlags r) {
+    l.flags |= r.flags;
+    return l;
+  }
+  friend bool operator&(BlockFieldFlags l, BlockFieldFlags r) {
+    return (l.flags & r.flags);
+  }
+};
+inline BlockFieldFlags operator|(BlockFieldFlag_t l, BlockFieldFlag_t r) {
+  return BlockFieldFlags(l) | BlockFieldFlags(r);
+}
+
+/// CGBlockInfo - Information to generate a block literal.
+class CGBlockInfo {
+public:
+  /// Name - The name of the block, kindof.
+  llvm::StringRef Name;
+
+  /// The field index of 'this' within the block, if there is one.
+  unsigned CXXThisIndex;
+
+  class Capture {
+    uintptr_t Data;
+    EHScopeStack::stable_iterator Cleanup;
+
+  public:
+    bool isIndex() const { return (Data & 1) != 0; }
+    bool isConstant() const { return !isIndex(); }
+    unsigned getIndex() const { assert(isIndex()); return Data >> 1; }
+    llvm::Value *getConstant() const {
+      assert(isConstant());
+      return reinterpret_cast<llvm::Value*>(Data);
+    }
+    EHScopeStack::stable_iterator getCleanup() const {
+      assert(isIndex());
+      return Cleanup;
+    }
+    void setCleanup(EHScopeStack::stable_iterator cleanup) {
+      assert(isIndex());
+      Cleanup = cleanup;
+    }
+
+    static Capture makeIndex(unsigned index) {
+      Capture v;
+      v.Data = (index << 1) | 1;
+      return v;
+    }
+
+    static Capture makeConstant(llvm::Value *value) {
+      Capture v;
+      v.Data = reinterpret_cast<uintptr_t>(value);
+      return v;
+    }    
+  };
+
+  /// CanBeGlobal - True if the block can be global, i.e. it has
+  /// no non-constant captures.
+  bool CanBeGlobal : 1;
+
+  /// True if the block needs a custom copy or dispose function.
+  bool NeedsCopyDispose : 1;
+
+  /// HasCXXObject - True if the block's custom copy/dispose functions
+  /// need to be run even in GC mode.
+  bool HasCXXObject : 1;
+
+  /// UsesStret : True if the block uses an stret return.  Mutable
+  /// because it gets set later in the block-creation process.
+  mutable bool UsesStret : 1;
+
+  /// The mapping of allocated indexes within the block.
+  llvm::DenseMap<const VarDecl*, Capture> Captures;  
+
+  llvm::AllocaInst *Address;
+  llvm::StructType *StructureType;
+  const BlockDecl *Block;
+  const BlockExpr *BlockExpression;
+  CharUnits BlockSize;
+  CharUnits BlockAlign;
+
+  /// An instruction which dominates the full-expression that the
+  /// block is inside.
+  llvm::Instruction *DominatingIP;
+
+  /// The next block in the block-info chain.  Invalid if this block
+  /// info is not part of the CGF's block-info chain, which is true
+  /// if it corresponds to a global block or a block whose expression
+  /// has been encountered.
+  CGBlockInfo *NextBlockInfo;
+
+  const Capture &getCapture(const VarDecl *var) const {
+    return const_cast<CGBlockInfo*>(this)->getCapture(var);
+  }
+  Capture &getCapture(const VarDecl *var) {
+    llvm::DenseMap<const VarDecl*, Capture>::iterator
+      it = Captures.find(var);
+    assert(it != Captures.end() && "no entry for variable!");
+    return it->second;
+  }
+
+  const BlockDecl *getBlockDecl() const { return Block; }
+  const BlockExpr *getBlockExpr() const {
+    assert(BlockExpression);
+    assert(BlockExpression->getBlockDecl() == Block);
+    return BlockExpression;
+  }
+
+  CGBlockInfo(const BlockDecl *blockDecl, llvm::StringRef Name);
+};
+
+}  // end namespace CodeGen
+}  // end namespace clang
+
+#endif