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

1 files changed, 322 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGDebugInfo.h b/clang/lib/CodeGen/CGDebugInfo.h
new file mode 100644
index 0000000..ec7705c
--- /dev/null
+++ b/clang/lib/CodeGen/CGDebugInfo.h
@@ -0,0 +1,322 @@
+//===--- CGDebugInfo.h - DebugInfo for LLVM CodeGen -------------*- 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 source level debug info generator for llvm translation.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CLANG_CODEGEN_CGDEBUGINFO_H
+#define CLANG_CODEGEN_CGDEBUGINFO_H
+
+#include "clang/AST/Type.h"
+#include "clang/AST/Expr.h"
+#include "clang/Basic/SourceLocation.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/Analysis/DebugInfo.h"
+#include "llvm/Analysis/DIBuilder.h"
+#include "llvm/Support/ValueHandle.h"
+#include "llvm/Support/Allocator.h"
+
+#include "CGBuilder.h"
+
+namespace llvm {
+  class MDNode;
+}
+
+namespace clang {
+  class VarDecl;
+  class ObjCInterfaceDecl;
+  class ClassTemplateSpecializationDecl;
+  class GlobalDecl;
+
+namespace CodeGen {
+  class CodeGenModule;
+  class CodeGenFunction;
+  class CGBlockInfo;
+
+/// CGDebugInfo - This class gathers all debug information during compilation
+/// and is responsible for emitting to llvm globals or pass directly to
+/// the backend.
+class CGDebugInfo {
+  CodeGenModule &CGM;
+  llvm::DIBuilder DBuilder;
+  llvm::DICompileUnit TheCU;
+  SourceLocation CurLoc, PrevLoc;
+  llvm::DIType VTablePtrType;
+  
+  /// TypeCache - Cache of previously constructed Types.
+  llvm::DenseMap<void *, llvm::WeakVH> TypeCache;
+
+  /// CompleteTypeCache - Cache of previously constructed complete RecordTypes.
+  llvm::DenseMap<void *, llvm::WeakVH> CompletedTypeCache;
+
+  /// ReplaceMap - Cache of forward declared types to RAUW at the end of
+  /// compilation.
+  std::vector<std::pair<void *, llvm::WeakVH> >ReplaceMap;
+
+  bool BlockLiteralGenericSet;
+  llvm::DIType BlockLiteralGeneric;
+
+  // LexicalBlockStack - Keep track of our current nested lexical block.
+  std::vector<llvm::TrackingVH<llvm::MDNode> > LexicalBlockStack;
+  llvm::DenseMap<const Decl *, llvm::WeakVH> RegionMap;
+  // FnBeginRegionCount - Keep track of LexicalBlockStack counter at the
+  // beginning of a function. This is used to pop unbalanced regions at
+  // the end of a function.
+  std::vector<unsigned> FnBeginRegionCount;
+
+  /// DebugInfoNames - This is a storage for names that are
+  /// constructed on demand. For example, C++ destructors, C++ operators etc..
+  llvm::BumpPtrAllocator DebugInfoNames;
+  StringRef CWDName;
+
+  llvm::DenseMap<const char *, llvm::WeakVH> DIFileCache;
+  llvm::DenseMap<const FunctionDecl *, llvm::WeakVH> SPCache;
+  llvm::DenseMap<const NamespaceDecl *, llvm::WeakVH> NameSpaceCache;
+
+  /// Helper functions for getOrCreateType.
+  llvm::DIType CreateType(const BuiltinType *Ty);
+  llvm::DIType CreateType(const ComplexType *Ty);
+  llvm::DIType CreateQualifiedType(QualType Ty, llvm::DIFile F);
+  llvm::DIType CreateType(const TypedefType *Ty, llvm::DIFile F);
+  llvm::DIType CreateType(const ObjCObjectPointerType *Ty,
+                          llvm::DIFile F);
+  llvm::DIType CreateType(const PointerType *Ty, llvm::DIFile F);
+  llvm::DIType CreateType(const BlockPointerType *Ty, llvm::DIFile F);
+  llvm::DIType CreateType(const FunctionType *Ty, llvm::DIFile F);
+  llvm::DIType CreateType(const RecordType *Ty);
+  llvm::DIType CreateLimitedType(const RecordType *Ty);
+  llvm::DIType CreateType(const ObjCInterfaceType *Ty, llvm::DIFile F);
+  llvm::DIType CreateType(const ObjCObjectType *Ty, llvm::DIFile F);
+  llvm::DIType CreateType(const VectorType *Ty, llvm::DIFile F);
+  llvm::DIType CreateType(const ArrayType *Ty, llvm::DIFile F);
+  llvm::DIType CreateType(const LValueReferenceType *Ty, llvm::DIFile F);
+  llvm::DIType CreateType(const RValueReferenceType *Ty, llvm::DIFile Unit);
+  llvm::DIType CreateType(const MemberPointerType *Ty, llvm::DIFile F);
+  llvm::DIType CreateType(const AtomicType *Ty, llvm::DIFile F);
+  llvm::DIType CreateEnumType(const EnumDecl *ED);
+  llvm::DIType getTypeOrNull(const QualType);
+  llvm::DIType getCompletedTypeOrNull(const QualType);
+  llvm::DIType getOrCreateMethodType(const CXXMethodDecl *Method,
+                                     llvm::DIFile F);
+  llvm::DIType getOrCreateFunctionType(const Decl *D, QualType FnType,
+                                       llvm::DIFile F);
+  llvm::DIType getOrCreateVTablePtrType(llvm::DIFile F);
+  llvm::DINameSpace getOrCreateNameSpace(const NamespaceDecl *N);
+  llvm::DIType CreatePointeeType(QualType PointeeTy, llvm::DIFile F);
+  llvm::DIType CreatePointerLikeType(unsigned Tag,
+                                     const Type *Ty, QualType PointeeTy,
+                                     llvm::DIFile F);
+  
+  llvm::DISubprogram CreateCXXMemberFunction(const CXXMethodDecl *Method,
+                                             llvm::DIFile F,
+                                             llvm::DIType RecordTy);
+  
+  void CollectCXXMemberFunctions(const CXXRecordDecl *Decl,
+                                 llvm::DIFile F,
+                                 SmallVectorImpl<llvm::Value *> &E,
+                                 llvm::DIType T);
+
+  void CollectCXXFriends(const CXXRecordDecl *Decl,
+                       llvm::DIFile F,
+                       SmallVectorImpl<llvm::Value *> &EltTys,
+                       llvm::DIType RecordTy);
+
+  void CollectCXXBases(const CXXRecordDecl *Decl,
+                       llvm::DIFile F,
+                       SmallVectorImpl<llvm::Value *> &EltTys,
+                       llvm::DIType RecordTy);
+  
+  llvm::DIArray
+  CollectTemplateParams(const TemplateParameterList *TPList,
+                        const TemplateArgumentList &TAList,
+                        llvm::DIFile Unit);
+  llvm::DIArray
+  CollectFunctionTemplateParams(const FunctionDecl *FD, llvm::DIFile Unit);
+  llvm::DIArray 
+  CollectCXXTemplateParams(const ClassTemplateSpecializationDecl *TS,
+                           llvm::DIFile F);
+
+  llvm::DIType createFieldType(StringRef name, QualType type,
+                               uint64_t sizeInBitsOverride, SourceLocation loc,
+                               AccessSpecifier AS, uint64_t offsetInBits,
+                               llvm::DIFile tunit,
+                               llvm::DIDescriptor scope);
+  void CollectRecordStaticVars(const RecordDecl *, llvm::DIType);
+  void CollectRecordFields(const RecordDecl *Decl, llvm::DIFile F,
+                           SmallVectorImpl<llvm::Value *> &E,
+                           llvm::DIType RecordTy);
+
+  void CollectVTableInfo(const CXXRecordDecl *Decl,
+                         llvm::DIFile F,
+                         SmallVectorImpl<llvm::Value *> &EltTys);
+
+  // CreateLexicalBlock - Create a new lexical block node and push it on
+  // the stack.
+  void CreateLexicalBlock(SourceLocation Loc);
+  
+public:
+  CGDebugInfo(CodeGenModule &CGM);
+  ~CGDebugInfo();
+
+  void finalize(void);
+
+  /// setLocation - Update the current source location. If \arg loc is
+  /// invalid it is ignored.
+  void setLocation(SourceLocation Loc);
+
+  /// EmitLocation - Emit metadata to indicate a change in line/column
+  /// information in the source file.
+  void EmitLocation(CGBuilderTy &Builder, SourceLocation Loc);
+
+  /// EmitFunctionStart - Emit a call to llvm.dbg.function.start to indicate
+  /// start of a new function.
+  void EmitFunctionStart(GlobalDecl GD, QualType FnType,
+                         llvm::Function *Fn, CGBuilderTy &Builder);
+
+  /// EmitFunctionEnd - Constructs the debug code for exiting a function.
+  void EmitFunctionEnd(CGBuilderTy &Builder);
+
+  /// EmitLexicalBlockStart - Emit metadata to indicate the beginning of a
+  /// new lexical block and push the block onto the stack.
+  void EmitLexicalBlockStart(CGBuilderTy &Builder, SourceLocation Loc);
+
+  /// EmitLexicalBlockEnd - Emit metadata to indicate the end of a new lexical
+  /// block and pop the current block.
+  void EmitLexicalBlockEnd(CGBuilderTy &Builder, SourceLocation Loc);
+
+  /// EmitDeclareOfAutoVariable - Emit call to llvm.dbg.declare for an automatic
+  /// variable declaration.
+  void EmitDeclareOfAutoVariable(const VarDecl *Decl, llvm::Value *AI,
+                                 CGBuilderTy &Builder);
+
+  /// EmitDeclareOfBlockDeclRefVariable - Emit call to llvm.dbg.declare for an
+  /// imported variable declaration in a block.
+  void EmitDeclareOfBlockDeclRefVariable(const VarDecl *variable,
+                                         llvm::Value *storage,
+                                         CGBuilderTy &Builder,
+                                         const CGBlockInfo &blockInfo);
+
+  /// EmitDeclareOfArgVariable - Emit call to llvm.dbg.declare for an argument
+  /// variable declaration.
+  void EmitDeclareOfArgVariable(const VarDecl *Decl, llvm::Value *AI,
+                                unsigned ArgNo, CGBuilderTy &Builder);
+
+  /// EmitDeclareOfBlockLiteralArgVariable - Emit call to
+  /// llvm.dbg.declare for the block-literal argument to a block
+  /// invocation function.
+  void EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block,
+                                            llvm::Value *addr,
+                                            CGBuilderTy &Builder);
+
+  /// EmitGlobalVariable - Emit information about a global variable.
+  void EmitGlobalVariable(llvm::GlobalVariable *GV, const VarDecl *Decl);
+
+  /// EmitGlobalVariable - Emit information about an objective-c interface.
+  void EmitGlobalVariable(llvm::GlobalVariable *GV, ObjCInterfaceDecl *Decl);
+
+  /// EmitGlobalVariable - Emit global variable's debug info.
+  void EmitGlobalVariable(const ValueDecl *VD, llvm::Constant *Init);
+
+  /// getOrCreateRecordType - Emit record type's standalone debug info. 
+  llvm::DIType getOrCreateRecordType(QualType Ty, SourceLocation L);
+
+  /// getOrCreateInterfaceType - Emit an objective c interface type standalone
+  /// debug info.
+  llvm::DIType getOrCreateInterfaceType(QualType Ty,
+					SourceLocation Loc);
+
+private:
+  /// EmitDeclare - Emit call to llvm.dbg.declare for a variable declaration.
+  void EmitDeclare(const VarDecl *decl, unsigned Tag, llvm::Value *AI,
+                   unsigned ArgNo, CGBuilderTy &Builder);
+
+  // EmitTypeForVarWithBlocksAttr - Build up structure info for the byref.  
+  // See BuildByRefType.
+  llvm::DIType EmitTypeForVarWithBlocksAttr(const ValueDecl *VD, 
+                                            uint64_t *OffSet);
+
+  /// getContextDescriptor - Get context info for the decl.
+  llvm::DIDescriptor getContextDescriptor(const Decl *Decl);
+
+  /// createRecordFwdDecl - Create a forward decl for a RecordType in a given
+  /// context.
+  llvm::DIType createRecordFwdDecl(const RecordDecl *, llvm::DIDescriptor);
+  
+  /// createContextChain - Create a set of decls for the context chain.
+  llvm::DIDescriptor createContextChain(const Decl *Decl);
+
+  /// getCurrentDirname - Return current directory name.
+  StringRef getCurrentDirname();
+
+  /// CreateCompileUnit - Create new compile unit.
+  void CreateCompileUnit();
+
+  /// getOrCreateFile - Get the file debug info descriptor for the input 
+  /// location.
+  llvm::DIFile getOrCreateFile(SourceLocation Loc);
+
+  /// getOrCreateMainFile - Get the file info for main compile unit.
+  llvm::DIFile getOrCreateMainFile();
+
+  /// getOrCreateType - Get the type from the cache or create a new type if
+  /// necessary.
+  llvm::DIType getOrCreateType(QualType Ty, llvm::DIFile F);
+
+  /// getOrCreateLimitedType - Get the type from the cache or create a new
+  /// partial type if necessary.
+  llvm::DIType getOrCreateLimitedType(QualType Ty, llvm::DIFile F);
+
+  /// CreateTypeNode - Create type metadata for a source language type.
+  llvm::DIType CreateTypeNode(QualType Ty, llvm::DIFile F);
+
+  /// CreateLimitedTypeNode - Create type metadata for a source language
+  /// type, but only partial types for records.
+  llvm::DIType CreateLimitedTypeNode(QualType Ty, llvm::DIFile F);
+
+  /// CreateMemberType - Create new member and increase Offset by FType's size.
+  llvm::DIType CreateMemberType(llvm::DIFile Unit, QualType FType,
+                                StringRef Name, uint64_t *Offset);
+
+  /// getFunctionDeclaration - Return debug info descriptor to describe method
+  /// declaration for the given method definition.
+  llvm::DISubprogram getFunctionDeclaration(const Decl *D);
+
+  /// getFunctionName - Get function name for the given FunctionDecl. If the
+  /// name is constructred on demand (e.g. C++ destructor) then the name
+  /// is stored on the side.
+  StringRef getFunctionName(const FunctionDecl *FD);
+
+  /// getObjCMethodName - Returns the unmangled name of an Objective-C method.
+  /// This is the display name for the debugging info.  
+  StringRef getObjCMethodName(const ObjCMethodDecl *FD);
+
+  /// getSelectorName - Return selector name. This is used for debugging
+  /// info.
+  StringRef getSelectorName(Selector S);
+
+  /// getClassName - Get class name including template argument list.
+  StringRef getClassName(const RecordDecl *RD);
+
+  /// getVTableName - Get vtable name for the given Class.
+  StringRef getVTableName(const CXXRecordDecl *Decl);
+
+  /// getLineNumber - Get line number for the location. If location is invalid
+  /// then use current location.
+  unsigned getLineNumber(SourceLocation Loc);
+
+  /// getColumnNumber - Get column number for the location. If location is 
+  /// invalid then use current location.
+  unsigned getColumnNumber(SourceLocation Loc);
+};
+} // namespace CodeGen
+} // namespace clang
+
+
+#endif