Add the clang library to the repo (with some of my changes, too).

1 files changed, 385 insertions, 0 deletions

diff --git a/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp b/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
new file mode 100644
index 0000000..8a49619
--- /dev/null
+++ b/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
@@ -0,0 +1,385 @@
+//=- ClangDiagnosticsEmitter.cpp - Generate Clang diagnostics tables -*- C++ -*-
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// These tablegen backends emit Clang diagnostics tables.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ClangDiagnosticsEmitter.h"
+#include "llvm/TableGen/Record.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/SmallString.h"
+#include <map>
+#include <algorithm>
+#include <functional>
+#include <set>
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+// Diagnostic category computation code.
+//===----------------------------------------------------------------------===//
+
+namespace {
+class DiagGroupParentMap {
+  RecordKeeper &Records;
+  std::map<const Record*, std::vector<Record*> > Mapping;
+public:
+  DiagGroupParentMap(RecordKeeper &records) : Records(records) {
+    std::vector<Record*> DiagGroups
+      = Records.getAllDerivedDefinitions("DiagGroup");
+    for (unsigned i = 0, e = DiagGroups.size(); i != e; ++i) {
+      std::vector<Record*> SubGroups =
+        DiagGroups[i]->getValueAsListOfDefs("SubGroups");
+      for (unsigned j = 0, e = SubGroups.size(); j != e; ++j)
+        Mapping[SubGroups[j]].push_back(DiagGroups[i]);
+    }
+  }
+  
+  const std::vector<Record*> &getParents(const Record *Group) {
+    return Mapping[Group];
+  }
+};
+} // end anonymous namespace.
+
+static std::string
+getCategoryFromDiagGroup(const Record *Group,
+                         DiagGroupParentMap &DiagGroupParents) {
+  // If the DiagGroup has a category, return it.
+  std::string CatName = Group->getValueAsString("CategoryName");
+  if (!CatName.empty()) return CatName;
+  
+  // The diag group may the subgroup of one or more other diagnostic groups,
+  // check these for a category as well.
+  const std::vector<Record*> &Parents = DiagGroupParents.getParents(Group);
+  for (unsigned i = 0, e = Parents.size(); i != e; ++i) {
+    CatName = getCategoryFromDiagGroup(Parents[i], DiagGroupParents);
+    if (!CatName.empty()) return CatName;
+  }
+  return "";
+}
+
+/// getDiagnosticCategory - Return the category that the specified diagnostic
+/// lives in.
+static std::string getDiagnosticCategory(const Record *R,
+                                         DiagGroupParentMap &DiagGroupParents) {
+  // If the diagnostic is in a group, and that group has a category, use it.
+  if (DefInit *Group = dynamic_cast<DefInit*>(R->getValueInit("Group"))) {
+    // Check the diagnostic's diag group for a category.
+    std::string CatName = getCategoryFromDiagGroup(Group->getDef(),
+                                                   DiagGroupParents);
+    if (!CatName.empty()) return CatName;
+  }
+  
+  // If the diagnostic itself has a category, get it.
+  return R->getValueAsString("CategoryName");
+}
+
+namespace {
+  class DiagCategoryIDMap {
+    RecordKeeper &Records;
+    StringMap<unsigned> CategoryIDs;
+    std::vector<std::string> CategoryStrings;
+  public:
+    DiagCategoryIDMap(RecordKeeper &records) : Records(records) {
+      DiagGroupParentMap ParentInfo(Records);
+      
+      // The zero'th category is "".
+      CategoryStrings.push_back("");
+      CategoryIDs[""] = 0;
+      
+      std::vector<Record*> Diags =
+      Records.getAllDerivedDefinitions("Diagnostic");
+      for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
+        std::string Category = getDiagnosticCategory(Diags[i], ParentInfo);
+        if (Category.empty()) continue;  // Skip diags with no category.
+        
+        unsigned &ID = CategoryIDs[Category];
+        if (ID != 0) continue;  // Already seen.
+        
+        ID = CategoryStrings.size();
+        CategoryStrings.push_back(Category);
+      }
+    }
+    
+    unsigned getID(StringRef CategoryString) {
+      return CategoryIDs[CategoryString];
+    }
+    
+    typedef std::vector<std::string>::iterator iterator;
+    iterator begin() { return CategoryStrings.begin(); }
+    iterator end() { return CategoryStrings.end(); }
+  };
+
+  struct GroupInfo {
+    std::vector<const Record*> DiagsInGroup;
+    std::vector<std::string> SubGroups;
+    unsigned IDNo;
+  };
+} // end anonymous namespace.
+
+/// \brief Invert the 1-[0/1] mapping of diags to group into a one to many
+/// mapping of groups to diags in the group.
+static void groupDiagnostics(const std::vector<Record*> &Diags,
+                             const std::vector<Record*> &DiagGroups,
+                             std::map<std::string, GroupInfo> &DiagsInGroup) {
+  for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
+    const Record *R = Diags[i];
+    DefInit *DI = dynamic_cast<DefInit*>(R->getValueInit("Group"));
+    if (DI == 0) continue;
+    std::string GroupName = DI->getDef()->getValueAsString("GroupName");
+    DiagsInGroup[GroupName].DiagsInGroup.push_back(R);
+  }
+  
+  // Add all DiagGroup's to the DiagsInGroup list to make sure we pick up empty
+  // groups (these are warnings that GCC supports that clang never produces).
+  for (unsigned i = 0, e = DiagGroups.size(); i != e; ++i) {
+    Record *Group = DiagGroups[i];
+    GroupInfo &GI = DiagsInGroup[Group->getValueAsString("GroupName")];
+    
+    std::vector<Record*> SubGroups = Group->getValueAsListOfDefs("SubGroups");
+    for (unsigned j = 0, e = SubGroups.size(); j != e; ++j)
+      GI.SubGroups.push_back(SubGroups[j]->getValueAsString("GroupName"));
+  }
+  
+  // Assign unique ID numbers to the groups.
+  unsigned IDNo = 0;
+  for (std::map<std::string, GroupInfo>::iterator
+       I = DiagsInGroup.begin(), E = DiagsInGroup.end(); I != E; ++I, ++IDNo)
+    I->second.IDNo = IDNo;
+}
+
+//===----------------------------------------------------------------------===//
+// Warning Tables (.inc file) generation.
+//===----------------------------------------------------------------------===//
+
+void ClangDiagsDefsEmitter::run(raw_ostream &OS) {
+  // Write the #if guard
+  if (!Component.empty()) {
+    std::string ComponentName = StringRef(Component).upper();
+    OS << "#ifdef " << ComponentName << "START\n";
+    OS << "__" << ComponentName << "START = DIAG_START_" << ComponentName
+       << ",\n";
+    OS << "#undef " << ComponentName << "START\n";
+    OS << "#endif\n\n";
+  }
+
+  const std::vector<Record*> &Diags =
+    Records.getAllDerivedDefinitions("Diagnostic");
+
+  std::vector<Record*> DiagGroups
+    = Records.getAllDerivedDefinitions("DiagGroup");
+
+  std::map<std::string, GroupInfo> DiagsInGroup;
+  groupDiagnostics(Diags, DiagGroups, DiagsInGroup);
+
+  DiagCategoryIDMap CategoryIDs(Records);
+  DiagGroupParentMap DGParentMap(Records);
+
+  for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
+    const Record &R = *Diags[i];
+    // Filter by component.
+    if (!Component.empty() && Component != R.getValueAsString("Component"))
+      continue;
+
+    OS << "DIAG(" << R.getName() << ", ";
+    OS << R.getValueAsDef("Class")->getName();
+    OS << ", diag::" << R.getValueAsDef("DefaultMapping")->getName();
+    
+    // Description string.
+    OS << ", \"";
+    OS.write_escaped(R.getValueAsString("Text")) << '"';
+    
+    // Warning associated with the diagnostic. This is stored as an index into
+    // the alphabetically sorted warning table.
+    if (DefInit *DI = dynamic_cast<DefInit*>(R.getValueInit("Group"))) {
+      std::map<std::string, GroupInfo>::iterator I =
+          DiagsInGroup.find(DI->getDef()->getValueAsString("GroupName"));
+      assert(I != DiagsInGroup.end());
+      OS << ", " << I->second.IDNo;
+    } else {
+      OS << ", 0";
+    }
+
+    // SFINAE bit
+    if (R.getValueAsBit("SFINAE"))
+      OS << ", true";
+    else
+      OS << ", false";
+
+    // Access control bit
+    if (R.getValueAsBit("AccessControl"))
+      OS << ", true";
+    else
+      OS << ", false";
+
+    // FIXME: This condition is just to avoid temporary revlock, it can be
+    // removed.
+    if (R.getValue("WarningNoWerror")) {
+      // Default warning has no Werror bit.
+      if (R.getValueAsBit("WarningNoWerror"))
+        OS << ", true";
+      else
+        OS << ", false";
+  
+      // Default warning show in system header bit.
+      if (R.getValueAsBit("WarningShowInSystemHeader"))
+        OS << ", true";
+      else
+        OS << ", false";
+    }
+  
+    // Category number.
+    OS << ", " << CategoryIDs.getID(getDiagnosticCategory(&R, DGParentMap));
+    OS << ")\n";
+  }
+}
+
+//===----------------------------------------------------------------------===//
+// Warning Group Tables generation
+//===----------------------------------------------------------------------===//
+
+static std::string getDiagCategoryEnum(llvm::StringRef name) {
+  if (name.empty())
+    return "DiagCat_None";
+  SmallString<256> enumName = llvm::StringRef("DiagCat_");
+  for (llvm::StringRef::iterator I = name.begin(), E = name.end(); I != E; ++I)
+    enumName += isalnum(*I) ? *I : '_';
+  return enumName.str();
+}
+
+void ClangDiagGroupsEmitter::run(raw_ostream &OS) {
+  // Compute a mapping from a DiagGroup to all of its parents.
+  DiagGroupParentMap DGParentMap(Records);
+  
+  std::vector<Record*> Diags =
+    Records.getAllDerivedDefinitions("Diagnostic");
+  
+  std::vector<Record*> DiagGroups
+    = Records.getAllDerivedDefinitions("DiagGroup");
+
+  std::map<std::string, GroupInfo> DiagsInGroup;
+  groupDiagnostics(Diags, DiagGroups, DiagsInGroup);
+  
+  // Walk through the groups emitting an array for each diagnostic of the diags
+  // that are mapped to.
+  OS << "\n#ifdef GET_DIAG_ARRAYS\n";
+  unsigned MaxLen = 0;
+  for (std::map<std::string, GroupInfo>::iterator
+       I = DiagsInGroup.begin(), E = DiagsInGroup.end(); I != E; ++I) {
+    MaxLen = std::max(MaxLen, (unsigned)I->first.size());
+    
+    std::vector<const Record*> &V = I->second.DiagsInGroup;
+    if (!V.empty()) {
+      OS << "static const short DiagArray" << I->second.IDNo << "[] = { ";
+      for (unsigned i = 0, e = V.size(); i != e; ++i)
+        OS << "diag::" << V[i]->getName() << ", ";
+      OS << "-1 };\n";
+    }
+    
+    const std::vector<std::string> &SubGroups = I->second.SubGroups;
+    if (!SubGroups.empty()) {
+      OS << "static const short DiagSubGroup" << I->second.IDNo << "[] = { ";
+      for (unsigned i = 0, e = SubGroups.size(); i != e; ++i) {
+        std::map<std::string, GroupInfo>::iterator RI =
+          DiagsInGroup.find(SubGroups[i]);
+        assert(RI != DiagsInGroup.end() && "Referenced without existing?");
+        OS << RI->second.IDNo << ", ";
+      }
+      OS << "-1 };\n";
+    }
+  }
+  OS << "#endif // GET_DIAG_ARRAYS\n\n";
+  
+  // Emit the table now.
+  OS << "\n#ifdef GET_DIAG_TABLE\n";
+  for (std::map<std::string, GroupInfo>::iterator
+       I = DiagsInGroup.begin(), E = DiagsInGroup.end(); I != E; ++I) {
+    // Group option string.
+    OS << "  { ";
+    OS << I->first.size() << ", ";
+    OS << "\"";
+    if (I->first.find_first_not_of("abcdefghijklmnopqrstuvwxyz"
+                                   "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+                                   "0123456789!@#$%^*-+=:?")!=std::string::npos)
+      throw "Invalid character in diagnostic group '" + I->first + "'";
+    OS.write_escaped(I->first) << "\","
+                               << std::string(MaxLen-I->first.size()+1, ' ');
+    
+    // Diagnostics in the group.
+    if (I->second.DiagsInGroup.empty())
+      OS << "0, ";
+    else
+      OS << "DiagArray" << I->second.IDNo << ", ";
+    
+    // Subgroups.
+    if (I->second.SubGroups.empty())
+      OS << 0;
+    else
+      OS << "DiagSubGroup" << I->second.IDNo;
+    OS << " },\n";
+  }
+  OS << "#endif // GET_DIAG_TABLE\n\n";
+  
+  // Emit the category table next.
+  DiagCategoryIDMap CategoriesByID(Records);
+  OS << "\n#ifdef GET_CATEGORY_TABLE\n";
+  for (DiagCategoryIDMap::iterator I = CategoriesByID.begin(),
+       E = CategoriesByID.end(); I != E; ++I)
+    OS << "CATEGORY(\"" << *I << "\", " << getDiagCategoryEnum(*I) << ")\n";
+  OS << "#endif // GET_CATEGORY_TABLE\n\n";
+}
+
+//===----------------------------------------------------------------------===//
+// Diagnostic name index generation
+//===----------------------------------------------------------------------===//
+
+namespace {
+struct RecordIndexElement
+{
+  RecordIndexElement() {}
+  explicit RecordIndexElement(Record const &R):
+    Name(R.getName()) {}
+  
+  std::string Name;
+};
+
+struct RecordIndexElementSorter :
+  public std::binary_function<RecordIndexElement, RecordIndexElement, bool> {
+  
+  bool operator()(RecordIndexElement const &Lhs,
+                  RecordIndexElement const &Rhs) const {
+    return Lhs.Name < Rhs.Name;
+  }
+  
+};
+
+} // end anonymous namespace.
+
+void ClangDiagsIndexNameEmitter::run(raw_ostream &OS) {
+  const std::vector<Record*> &Diags =
+    Records.getAllDerivedDefinitions("Diagnostic");
+  
+  std::vector<RecordIndexElement> Index;
+  Index.reserve(Diags.size());
+  for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
+    const Record &R = *(Diags[i]);    
+    Index.push_back(RecordIndexElement(R));
+  }
+  
+  std::sort(Index.begin(), Index.end(), RecordIndexElementSorter());
+  
+  for (unsigned i = 0, e = Index.size(); i != e; ++i) {
+    const RecordIndexElement &R = Index[i];
+    
+    OS << "DIAG_NAME_INDEX(" << R.Name << ")\n";
+  }
+}