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

1 files changed, 986 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
new file mode 100644
index 0000000..38f5008
--- /dev/null
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -0,0 +1,986 @@
+//===--- CodeGenModule.h - Per-Module state 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 internal per-translation-unit state used for llvm translation.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CLANG_CODEGEN_CODEGENMODULE_H
+#define CLANG_CODEGEN_CODEGENMODULE_H
+
+#include "clang/Basic/ABI.h"
+#include "clang/Basic/LangOptions.h"
+#include "clang/AST/Attr.h"
+#include "clang/AST/DeclCXX.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/AST/GlobalDecl.h"
+#include "clang/AST/Mangle.h"
+#include "CGVTables.h"
+#include "CodeGenTypes.h"
+#include "llvm/Module.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/Support/ValueHandle.h"
+
+namespace llvm {
+  class Module;
+  class Constant;
+  class ConstantInt;
+  class Function;
+  class GlobalValue;
+  class TargetData;
+  class FunctionType;
+  class LLVMContext;
+}
+
+namespace clang {
+  class TargetCodeGenInfo;
+  class ASTContext;
+  class FunctionDecl;
+  class IdentifierInfo;
+  class ObjCMethodDecl;
+  class ObjCImplementationDecl;
+  class ObjCCategoryImplDecl;
+  class ObjCProtocolDecl;
+  class ObjCEncodeExpr;
+  class BlockExpr;
+  class CharUnits;
+  class Decl;
+  class Expr;
+  class Stmt;
+  class InitListExpr;
+  class StringLiteral;
+  class NamedDecl;
+  class ValueDecl;
+  class VarDecl;
+  class LangOptions;
+  class CodeGenOptions;
+  class DiagnosticsEngine;
+  class AnnotateAttr;
+  class CXXDestructorDecl;
+  class MangleBuffer;
+
+namespace CodeGen {
+
+  class CallArgList;
+  class CodeGenFunction;
+  class CodeGenTBAA;
+  class CGCXXABI;
+  class CGDebugInfo;
+  class CGObjCRuntime;
+  class CGOpenCLRuntime;
+  class CGCUDARuntime;
+  class BlockFieldFlags;
+  class FunctionArgList;
+  
+  struct OrderGlobalInits {
+    unsigned int priority;
+    unsigned int lex_order;
+    OrderGlobalInits(unsigned int p, unsigned int l) 
+      : priority(p), lex_order(l) {}
+    
+    bool operator==(const OrderGlobalInits &RHS) const {
+      return priority == RHS.priority &&
+             lex_order == RHS.lex_order;
+    }
+    
+    bool operator<(const OrderGlobalInits &RHS) const {
+      if (priority < RHS.priority)
+        return true;
+      
+      return priority == RHS.priority && lex_order < RHS.lex_order;
+    }
+  };
+
+  struct CodeGenTypeCache {
+    /// void
+    llvm::Type *VoidTy;
+
+    /// i8, i16, i32, and i64
+    llvm::IntegerType *Int8Ty, *Int16Ty, *Int32Ty, *Int64Ty;
+    /// float, double
+    llvm::Type *FloatTy, *DoubleTy;
+
+    /// int
+    llvm::IntegerType *IntTy;
+
+    /// intptr_t, size_t, and ptrdiff_t, which we assume are the same size.
+    union {
+      llvm::IntegerType *IntPtrTy;
+      llvm::IntegerType *SizeTy;
+      llvm::IntegerType *PtrDiffTy;
+    };
+
+    /// void* in address space 0
+    union {
+      llvm::PointerType *VoidPtrTy;
+      llvm::PointerType *Int8PtrTy;
+    };
+
+    /// void** in address space 0
+    union {
+      llvm::PointerType *VoidPtrPtrTy;
+      llvm::PointerType *Int8PtrPtrTy;
+    };
+
+    /// The width of a pointer into the generic address space.
+    unsigned char PointerWidthInBits;
+
+    /// The size and alignment of a pointer into the generic address
+    /// space.
+    union {
+      unsigned char PointerAlignInBytes;
+      unsigned char PointerSizeInBytes;
+    };
+  };
+
+struct RREntrypoints {
+  RREntrypoints() { memset(this, 0, sizeof(*this)); }
+  /// void objc_autoreleasePoolPop(void*);
+  llvm::Constant *objc_autoreleasePoolPop;
+
+  /// void *objc_autoreleasePoolPush(void);
+  llvm::Constant *objc_autoreleasePoolPush;
+};
+
+struct ARCEntrypoints {
+  ARCEntrypoints() { memset(this, 0, sizeof(*this)); }
+
+  /// id objc_autorelease(id);
+  llvm::Constant *objc_autorelease;
+
+  /// id objc_autoreleaseReturnValue(id);
+  llvm::Constant *objc_autoreleaseReturnValue;
+
+  /// void objc_copyWeak(id *dest, id *src);
+  llvm::Constant *objc_copyWeak;
+
+  /// void objc_destroyWeak(id*);
+  llvm::Constant *objc_destroyWeak;
+
+  /// id objc_initWeak(id*, id);
+  llvm::Constant *objc_initWeak;
+
+  /// id objc_loadWeak(id*);
+  llvm::Constant *objc_loadWeak;
+
+  /// id objc_loadWeakRetained(id*);
+  llvm::Constant *objc_loadWeakRetained;
+
+  /// void objc_moveWeak(id *dest, id *src);
+  llvm::Constant *objc_moveWeak;
+
+  /// id objc_retain(id);
+  llvm::Constant *objc_retain;
+
+  /// id objc_retainAutorelease(id);
+  llvm::Constant *objc_retainAutorelease;
+
+  /// id objc_retainAutoreleaseReturnValue(id);
+  llvm::Constant *objc_retainAutoreleaseReturnValue;
+
+  /// id objc_retainAutoreleasedReturnValue(id);
+  llvm::Constant *objc_retainAutoreleasedReturnValue;
+
+  /// id objc_retainBlock(id);
+  llvm::Constant *objc_retainBlock;
+
+  /// void objc_release(id);
+  llvm::Constant *objc_release;
+
+  /// id objc_storeStrong(id*, id);
+  llvm::Constant *objc_storeStrong;
+
+  /// id objc_storeWeak(id*, id);
+  llvm::Constant *objc_storeWeak;
+
+  /// A void(void) inline asm to use to mark that the return value of
+  /// a call will be immediately retain.
+  llvm::InlineAsm *retainAutoreleasedReturnValueMarker;
+};
+  
+/// CodeGenModule - This class organizes the cross-function state that is used
+/// while generating LLVM code.
+class CodeGenModule : public CodeGenTypeCache {
+  CodeGenModule(const CodeGenModule&);  // DO NOT IMPLEMENT
+  void operator=(const CodeGenModule&); // DO NOT IMPLEMENT
+
+  typedef std::vector<std::pair<llvm::Constant*, int> > CtorList;
+
+  ASTContext &Context;
+  const LangOptions &LangOpts;
+  const CodeGenOptions &CodeGenOpts;
+  llvm::Module &TheModule;
+  const llvm::TargetData &TheTargetData;
+  mutable const TargetCodeGenInfo *TheTargetCodeGenInfo;
+  DiagnosticsEngine &Diags;
+  CGCXXABI &ABI;
+  CodeGenTypes Types;
+  CodeGenTBAA *TBAA;
+
+  /// VTables - Holds information about C++ vtables.
+  CodeGenVTables VTables;
+  friend class CodeGenVTables;
+
+  CGObjCRuntime* ObjCRuntime;
+  CGOpenCLRuntime* OpenCLRuntime;
+  CGCUDARuntime* CUDARuntime;
+  CGDebugInfo* DebugInfo;
+  ARCEntrypoints *ARCData;
+  llvm::MDNode *NoObjCARCExceptionsMetadata;
+  RREntrypoints *RRData;
+
+  // WeakRefReferences - A set of references that have only been seen via
+  // a weakref so far. This is used to remove the weak of the reference if we ever
+  // see a direct reference or a definition.
+  llvm::SmallPtrSet<llvm::GlobalValue*, 10> WeakRefReferences;
+
+  /// DeferredDecls - This contains all the decls which have definitions but
+  /// which are deferred for emission and therefore should only be output if
+  /// they are actually used.  If a decl is in this, then it is known to have
+  /// not been referenced yet.
+  llvm::StringMap<GlobalDecl> DeferredDecls;
+
+  /// DeferredDeclsToEmit - This is a list of deferred decls which we have seen
+  /// that *are* actually referenced.  These get code generated when the module
+  /// is done.
+  std::vector<GlobalDecl> DeferredDeclsToEmit;
+
+  /// LLVMUsed - List of global values which are required to be
+  /// present in the object file; bitcast to i8*. This is used for
+  /// forcing visibility of symbols which may otherwise be optimized
+  /// out.
+  std::vector<llvm::WeakVH> LLVMUsed;
+
+  /// GlobalCtors - Store the list of global constructors and their respective
+  /// priorities to be emitted when the translation unit is complete.
+  CtorList GlobalCtors;
+
+  /// GlobalDtors - Store the list of global destructors and their respective
+  /// priorities to be emitted when the translation unit is complete.
+  CtorList GlobalDtors;
+
+  /// MangledDeclNames - A map of canonical GlobalDecls to their mangled names.
+  llvm::DenseMap<GlobalDecl, StringRef> MangledDeclNames;
+  llvm::BumpPtrAllocator MangledNamesAllocator;
+  
+  /// Global annotations.
+  std::vector<llvm::Constant*> Annotations;
+
+  /// Map used to get unique annotation strings.
+  llvm::StringMap<llvm::Constant*> AnnotationStrings;
+
+  llvm::StringMap<llvm::Constant*> CFConstantStringMap;
+  llvm::StringMap<llvm::GlobalVariable*> ConstantStringMap;
+  llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap;
+  llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap;
+  
+  llvm::DenseMap<QualType, llvm::Constant *> AtomicSetterHelperFnMap;
+  llvm::DenseMap<QualType, llvm::Constant *> AtomicGetterHelperFnMap;
+
+  /// CXXGlobalInits - Global variables with initializers that need to run
+  /// before main.
+  std::vector<llvm::Constant*> CXXGlobalInits;
+
+  /// When a C++ decl with an initializer is deferred, null is
+  /// appended to CXXGlobalInits, and the index of that null is placed
+  /// here so that the initializer will be performed in the correct
+  /// order.
+  llvm::DenseMap<const Decl*, unsigned> DelayedCXXInitPosition;
+  
+  /// - Global variables with initializers whose order of initialization
+  /// is set by init_priority attribute.
+  
+  SmallVector<std::pair<OrderGlobalInits, llvm::Function*>, 8> 
+    PrioritizedCXXGlobalInits;
+
+  /// CXXGlobalDtors - Global destructor functions and arguments that need to
+  /// run on termination.
+  std::vector<std::pair<llvm::WeakVH,llvm::Constant*> > CXXGlobalDtors;
+
+  /// @name Cache for Objective-C runtime types
+  /// @{
+
+  /// CFConstantStringClassRef - Cached reference to the class for constant
+  /// strings. This value has type int * but is actually an Obj-C class pointer.
+  llvm::Constant *CFConstantStringClassRef;
+
+  /// ConstantStringClassRef - Cached reference to the class for constant
+  /// strings. This value has type int * but is actually an Obj-C class pointer.
+  llvm::Constant *ConstantStringClassRef;
+
+  /// \brief The LLVM type corresponding to NSConstantString.
+  llvm::StructType *NSConstantStringType;
+  
+  /// \brief The type used to describe the state of a fast enumeration in
+  /// Objective-C's for..in loop.
+  QualType ObjCFastEnumerationStateType;
+  
+  /// @}
+
+  /// Lazily create the Objective-C runtime
+  void createObjCRuntime();
+
+  void createOpenCLRuntime();
+  void createCUDARuntime();
+
+  bool isTriviallyRecursive(const FunctionDecl *F);
+  bool shouldEmitFunction(const FunctionDecl *F);
+  llvm::LLVMContext &VMContext;
+
+  /// @name Cache for Blocks Runtime Globals
+  /// @{
+
+  llvm::Constant *NSConcreteGlobalBlock;
+  llvm::Constant *NSConcreteStackBlock;
+
+  llvm::Constant *BlockObjectAssign;
+  llvm::Constant *BlockObjectDispose;
+
+  llvm::Type *BlockDescriptorType;
+  llvm::Type *GenericBlockLiteralType;
+
+  struct {
+    int GlobalUniqueCount;
+  } Block;
+
+  /// @}
+public:
+  CodeGenModule(ASTContext &C, const CodeGenOptions &CodeGenOpts,
+                llvm::Module &M, const llvm::TargetData &TD,
+                DiagnosticsEngine &Diags);
+
+  ~CodeGenModule();
+
+  /// Release - Finalize LLVM code generation.
+  void Release();
+
+  /// getObjCRuntime() - Return a reference to the configured
+  /// Objective-C runtime.
+  CGObjCRuntime &getObjCRuntime() {
+    if (!ObjCRuntime) createObjCRuntime();
+    return *ObjCRuntime;
+  }
+
+  /// hasObjCRuntime() - Return true iff an Objective-C runtime has
+  /// been configured.
+  bool hasObjCRuntime() { return !!ObjCRuntime; }
+
+  /// getOpenCLRuntime() - Return a reference to the configured OpenCL runtime.
+  CGOpenCLRuntime &getOpenCLRuntime() {
+    assert(OpenCLRuntime != 0);
+    return *OpenCLRuntime;
+  }
+
+  /// getCUDARuntime() - Return a reference to the configured CUDA runtime.
+  CGCUDARuntime &getCUDARuntime() {
+    assert(CUDARuntime != 0);
+    return *CUDARuntime;
+  }
+
+  /// getCXXABI() - Return a reference to the configured C++ ABI.
+  CGCXXABI &getCXXABI() { return ABI; }
+
+  ARCEntrypoints &getARCEntrypoints() const {
+    assert(getLangOpts().ObjCAutoRefCount && ARCData != 0);
+    return *ARCData;
+  }
+
+  RREntrypoints &getRREntrypoints() const {
+    assert(RRData != 0);
+    return *RRData;
+  }
+
+  llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) {
+    return StaticLocalDeclMap[D];
+  }
+  void setStaticLocalDeclAddress(const VarDecl *D, 
+                                 llvm::Constant *C) {
+    StaticLocalDeclMap[D] = C;
+  }
+
+  llvm::GlobalVariable *getStaticLocalDeclGuardAddress(const VarDecl *D) {
+    return StaticLocalDeclGuardMap[D];
+  }
+  void setStaticLocalDeclGuardAddress(const VarDecl *D, 
+                                      llvm::GlobalVariable *C) {
+    StaticLocalDeclGuardMap[D] = C;
+  }
+
+  llvm::Constant *getAtomicSetterHelperFnMap(QualType Ty) {
+    return AtomicSetterHelperFnMap[Ty];
+  }
+  void setAtomicSetterHelperFnMap(QualType Ty,
+                            llvm::Constant *Fn) {
+    AtomicSetterHelperFnMap[Ty] = Fn;
+  }
+
+  llvm::Constant *getAtomicGetterHelperFnMap(QualType Ty) {
+    return AtomicGetterHelperFnMap[Ty];
+  }
+  void setAtomicGetterHelperFnMap(QualType Ty,
+                            llvm::Constant *Fn) {
+    AtomicGetterHelperFnMap[Ty] = Fn;
+  }
+
+  CGDebugInfo *getModuleDebugInfo() { return DebugInfo; }
+
+  llvm::MDNode *getNoObjCARCExceptionsMetadata() {
+    if (!NoObjCARCExceptionsMetadata)
+      NoObjCARCExceptionsMetadata =
+        llvm::MDNode::get(getLLVMContext(),
+                          SmallVector<llvm::Value*,1>());
+    return NoObjCARCExceptionsMetadata;
+  }
+
+  ASTContext &getContext() const { return Context; }
+  const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; }
+  const LangOptions &getLangOpts() const { return LangOpts; }
+  llvm::Module &getModule() const { return TheModule; }
+  CodeGenTypes &getTypes() { return Types; }
+  CodeGenVTables &getVTables() { return VTables; }
+  VTableContext &getVTableContext() { return VTables.getVTableContext(); }
+  DiagnosticsEngine &getDiags() const { return Diags; }
+  const llvm::TargetData &getTargetData() const { return TheTargetData; }
+  const TargetInfo &getTarget() const { return Context.getTargetInfo(); }
+  llvm::LLVMContext &getLLVMContext() { return VMContext; }
+  const TargetCodeGenInfo &getTargetCodeGenInfo();
+  bool isTargetDarwin() const;
+
+  bool shouldUseTBAA() const { return TBAA != 0; }
+
+  llvm::MDNode *getTBAAInfo(QualType QTy);
+  llvm::MDNode *getTBAAInfoForVTablePtr();
+
+  bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor);
+
+  static void DecorateInstruction(llvm::Instruction *Inst,
+                                  llvm::MDNode *TBAAInfo);
+
+  /// getSize - Emit the given number of characters as a value of type size_t.
+  llvm::ConstantInt *getSize(CharUnits numChars);
+
+  /// setGlobalVisibility - Set the visibility for the given LLVM
+  /// GlobalValue.
+  void setGlobalVisibility(llvm::GlobalValue *GV, const NamedDecl *D) const;
+
+  /// TypeVisibilityKind - The kind of global variable that is passed to 
+  /// setTypeVisibility
+  enum TypeVisibilityKind {
+    TVK_ForVTT,
+    TVK_ForVTable,
+    TVK_ForConstructionVTable,
+    TVK_ForRTTI,
+    TVK_ForRTTIName
+  };
+
+  /// setTypeVisibility - Set the visibility for the given global
+  /// value which holds information about a type.
+  void setTypeVisibility(llvm::GlobalValue *GV, const CXXRecordDecl *D,
+                         TypeVisibilityKind TVK) const;
+
+  static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V) {
+    switch (V) {
+    case DefaultVisibility:   return llvm::GlobalValue::DefaultVisibility;
+    case HiddenVisibility:    return llvm::GlobalValue::HiddenVisibility;
+    case ProtectedVisibility: return llvm::GlobalValue::ProtectedVisibility;
+    }
+    llvm_unreachable("unknown visibility!");
+  }
+
+  llvm::Constant *GetAddrOfGlobal(GlobalDecl GD) {
+    if (isa<CXXConstructorDecl>(GD.getDecl()))
+      return GetAddrOfCXXConstructor(cast<CXXConstructorDecl>(GD.getDecl()),
+                                     GD.getCtorType());
+    else if (isa<CXXDestructorDecl>(GD.getDecl()))
+      return GetAddrOfCXXDestructor(cast<CXXDestructorDecl>(GD.getDecl()),
+                                     GD.getDtorType());
+    else if (isa<FunctionDecl>(GD.getDecl()))
+      return GetAddrOfFunction(GD);
+    else
+      return GetAddrOfGlobalVar(cast<VarDecl>(GD.getDecl()));
+  }
+
+  /// CreateOrReplaceCXXRuntimeVariable - Will return a global variable of the given
+  /// type. If a variable with a different type already exists then a new 
+  /// variable with the right type will be created and all uses of the old
+  /// variable will be replaced with a bitcast to the new variable.
+  llvm::GlobalVariable *
+  CreateOrReplaceCXXRuntimeVariable(StringRef Name, llvm::Type *Ty,
+                                    llvm::GlobalValue::LinkageTypes Linkage);
+
+  /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the
+  /// given global variable.  If Ty is non-null and if the global doesn't exist,
+  /// then it will be greated with the specified type instead of whatever the
+  /// normal requested type would be.
+  llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D,
+                                     llvm::Type *Ty = 0);
+
+
+  /// GetAddrOfFunction - Return the address of the given function.  If Ty is
+  /// non-null, then this function will use the specified type if it has to
+  /// create it.
+  llvm::Constant *GetAddrOfFunction(GlobalDecl GD,
+                                    llvm::Type *Ty = 0,
+                                    bool ForVTable = false);
+
+  /// GetAddrOfRTTIDescriptor - Get the address of the RTTI descriptor 
+  /// for the given type.
+  llvm::Constant *GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH = false);
+
+  /// GetAddrOfThunk - Get the address of the thunk for the given global decl.
+  llvm::Constant *GetAddrOfThunk(GlobalDecl GD, const ThunkInfo &Thunk);
+
+  /// GetWeakRefReference - Get a reference to the target of VD.
+  llvm::Constant *GetWeakRefReference(const ValueDecl *VD);
+
+  /// GetNonVirtualBaseClassOffset - Returns the offset from a derived class to 
+  /// a class. Returns null if the offset is 0. 
+  llvm::Constant *
+  GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl,
+                               CastExpr::path_const_iterator PathBegin,
+                               CastExpr::path_const_iterator PathEnd);
+
+  /// A pair of helper functions for a __block variable.
+  class ByrefHelpers : public llvm::FoldingSetNode {
+  public:
+    llvm::Constant *CopyHelper;
+    llvm::Constant *DisposeHelper;
+
+    /// The alignment of the field.  This is important because
+    /// different offsets to the field within the byref struct need to
+    /// have different helper functions.
+    CharUnits Alignment;
+
+    ByrefHelpers(CharUnits alignment) : Alignment(alignment) {}
+    virtual ~ByrefHelpers();
+
+    void Profile(llvm::FoldingSetNodeID &id) const {
+      id.AddInteger(Alignment.getQuantity());
+      profileImpl(id);
+    }
+    virtual void profileImpl(llvm::FoldingSetNodeID &id) const = 0;
+
+    virtual bool needsCopy() const { return true; }
+    virtual void emitCopy(CodeGenFunction &CGF,
+                          llvm::Value *dest, llvm::Value *src) = 0;
+
+    virtual bool needsDispose() const { return true; }
+    virtual void emitDispose(CodeGenFunction &CGF, llvm::Value *field) = 0;
+  };
+
+  llvm::FoldingSet<ByrefHelpers> ByrefHelpersCache;
+
+  /// getUniqueBlockCount - Fetches the global unique block count.
+  int getUniqueBlockCount() { return ++Block.GlobalUniqueCount; }
+
+  /// getBlockDescriptorType - Fetches the type of a generic block
+  /// descriptor.
+  llvm::Type *getBlockDescriptorType();
+
+  /// getGenericBlockLiteralType - The type of a generic block literal.
+  llvm::Type *getGenericBlockLiteralType();
+
+  /// GetAddrOfGlobalBlock - Gets the address of a block which
+  /// requires no captures.
+  llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, const char *);
+  
+  /// GetAddrOfConstantCFString - Return a pointer to a constant CFString object
+  /// for the given string.
+  llvm::Constant *GetAddrOfConstantCFString(const StringLiteral *Literal);
+  
+  /// GetAddrOfConstantString - Return a pointer to a constant NSString object
+  /// for the given string. Or a user defined String object as defined via
+  /// -fconstant-string-class=class_name option.
+  llvm::Constant *GetAddrOfConstantString(const StringLiteral *Literal);
+
+  /// GetConstantArrayFromStringLiteral - Return a constant array for the given
+  /// string.
+  llvm::Constant *GetConstantArrayFromStringLiteral(const StringLiteral *E);
+
+  /// GetAddrOfConstantStringFromLiteral - Return a pointer to a constant array
+  /// for the given string literal.
+  llvm::Constant *GetAddrOfConstantStringFromLiteral(const StringLiteral *S);
+
+  /// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant
+  /// array for the given ObjCEncodeExpr node.
+  llvm::Constant *GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *);
+
+  /// GetAddrOfConstantString - Returns a pointer to a character array
+  /// containing the literal. This contents are exactly that of the given
+  /// string, i.e. it will not be null terminated automatically; see
+  /// GetAddrOfConstantCString. Note that whether the result is actually a
+  /// pointer to an LLVM constant depends on Feature.WriteableStrings.
+  ///
+  /// The result has pointer to array type.
+  ///
+  /// \param GlobalName If provided, the name to use for the global
+  /// (if one is created).
+  llvm::Constant *GetAddrOfConstantString(StringRef Str,
+                                          const char *GlobalName=0,
+                                          unsigned Alignment=1);
+
+  /// GetAddrOfConstantCString - Returns a pointer to a character array
+  /// containing the literal and a terminating '\0' character. The result has
+  /// pointer to array type.
+  ///
+  /// \param GlobalName If provided, the name to use for the global (if one is
+  /// created).
+  llvm::Constant *GetAddrOfConstantCString(const std::string &str,
+                                           const char *GlobalName=0,
+                                           unsigned Alignment=1);
+
+  /// GetAddrOfConstantCompoundLiteral - Returns a pointer to a constant global
+  /// variable for the given file-scope compound literal expression.
+  llvm::Constant *GetAddrOfConstantCompoundLiteral(const CompoundLiteralExpr*E);
+  
+  /// \brief Retrieve the record type that describes the state of an
+  /// Objective-C fast enumeration loop (for..in).
+  QualType getObjCFastEnumerationStateType();
+  
+  /// GetAddrOfCXXConstructor - Return the address of the constructor of the
+  /// given type.
+  llvm::GlobalValue *GetAddrOfCXXConstructor(const CXXConstructorDecl *ctor,
+                                             CXXCtorType ctorType,
+                                             const CGFunctionInfo *fnInfo = 0);
+
+  /// GetAddrOfCXXDestructor - Return the address of the constructor of the
+  /// given type.
+  llvm::GlobalValue *GetAddrOfCXXDestructor(const CXXDestructorDecl *dtor,
+                                            CXXDtorType dtorType,
+                                            const CGFunctionInfo *fnInfo = 0);
+
+  /// getBuiltinLibFunction - Given a builtin id for a function like
+  /// "__builtin_fabsf", return a Function* for "fabsf".
+  llvm::Value *getBuiltinLibFunction(const FunctionDecl *FD,
+                                     unsigned BuiltinID);
+
+  llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys =
+                                                 ArrayRef<llvm::Type*>());
+
+  /// EmitTopLevelDecl - Emit code for a single top level declaration.
+  void EmitTopLevelDecl(Decl *D);
+
+  /// HandleCXXStaticMemberVarInstantiation - Tell the consumer that this
+  // variable has been instantiated.
+  void HandleCXXStaticMemberVarInstantiation(VarDecl *VD);
+
+  /// AddUsedGlobal - Add a global which should be forced to be
+  /// present in the object file; these are emitted to the llvm.used
+  /// metadata global.
+  void AddUsedGlobal(llvm::GlobalValue *GV);
+
+  /// AddCXXDtorEntry - Add a destructor and object to add to the C++ global
+  /// destructor function.
+  void AddCXXDtorEntry(llvm::Constant *DtorFn, llvm::Constant *Object) {
+    CXXGlobalDtors.push_back(std::make_pair(DtorFn, Object));
+  }
+
+  /// CreateRuntimeFunction - Create a new runtime function with the specified
+  /// type and name.
+  llvm::Constant *CreateRuntimeFunction(llvm::FunctionType *Ty,
+                                        StringRef Name,
+                                        llvm::Attributes ExtraAttrs =
+                                          llvm::Attribute::None);
+  /// CreateRuntimeVariable - Create a new runtime global variable with the
+  /// specified type and name.
+  llvm::Constant *CreateRuntimeVariable(llvm::Type *Ty,
+                                        StringRef Name);
+
+  ///@name Custom Blocks Runtime Interfaces
+  ///@{
+
+  llvm::Constant *getNSConcreteGlobalBlock();
+  llvm::Constant *getNSConcreteStackBlock();
+  llvm::Constant *getBlockObjectAssign();
+  llvm::Constant *getBlockObjectDispose();
+
+  ///@}
+
+  // UpdateCompleteType - Make sure that this type is translated.
+  void UpdateCompletedType(const TagDecl *TD);
+
+  llvm::Constant *getMemberPointerConstant(const UnaryOperator *e);
+
+  /// EmitConstantInit - Try to emit the initializer for the given declaration
+  /// as a constant; returns 0 if the expression cannot be emitted as a
+  /// constant.
+  llvm::Constant *EmitConstantInit(const VarDecl &D, CodeGenFunction *CGF = 0);
+
+  /// EmitConstantExpr - Try to emit the given expression as a
+  /// constant; returns 0 if the expression cannot be emitted as a
+  /// constant.
+  llvm::Constant *EmitConstantExpr(const Expr *E, QualType DestType,
+                                   CodeGenFunction *CGF = 0);
+
+  /// EmitConstantValue - Emit the given constant value as a constant, in the
+  /// type's scalar representation.
+  llvm::Constant *EmitConstantValue(const APValue &Value, QualType DestType,
+                                    CodeGenFunction *CGF = 0);
+
+  /// EmitConstantValueForMemory - Emit the given constant value as a constant,
+  /// in the type's memory representation.
+  llvm::Constant *EmitConstantValueForMemory(const APValue &Value,
+                                             QualType DestType,
+                                             CodeGenFunction *CGF = 0);
+
+  /// EmitNullConstant - Return the result of value-initializing the given
+  /// type, i.e. a null expression of the given type.  This is usually,
+  /// but not always, an LLVM null constant.
+  llvm::Constant *EmitNullConstant(QualType T);
+
+  /// EmitNullConstantForBase - Return a null constant appropriate for 
+  /// zero-initializing a base class with the given type.  This is usually,
+  /// but not always, an LLVM null constant.
+  llvm::Constant *EmitNullConstantForBase(const CXXRecordDecl *Record);
+
+  /// Error - Emit a general error that something can't be done.
+  void Error(SourceLocation loc, StringRef error);
+
+  /// ErrorUnsupported - Print out an error that codegen doesn't support the
+  /// specified stmt yet.
+  /// \param OmitOnError - If true, then this error should only be emitted if no
+  /// other errors have been reported.
+  void ErrorUnsupported(const Stmt *S, const char *Type,
+                        bool OmitOnError=false);
+
+  /// ErrorUnsupported - Print out an error that codegen doesn't support the
+  /// specified decl yet.
+  /// \param OmitOnError - If true, then this error should only be emitted if no
+  /// other errors have been reported.
+  void ErrorUnsupported(const Decl *D, const char *Type,
+                        bool OmitOnError=false);
+
+  /// SetInternalFunctionAttributes - Set the attributes on the LLVM
+  /// function for the given decl and function info. This applies
+  /// attributes necessary for handling the ABI as well as user
+  /// specified attributes like section.
+  void SetInternalFunctionAttributes(const Decl *D, llvm::Function *F,
+                                     const CGFunctionInfo &FI);
+
+  /// SetLLVMFunctionAttributes - Set the LLVM function attributes
+  /// (sext, zext, etc).
+  void SetLLVMFunctionAttributes(const Decl *D,
+                                 const CGFunctionInfo &Info,
+                                 llvm::Function *F);
+
+  /// SetLLVMFunctionAttributesForDefinition - Set the LLVM function attributes
+  /// which only apply to a function definintion.
+  void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F);
+
+  /// ReturnTypeUsesSRet - Return true iff the given type uses 'sret' when used
+  /// as a return type.
+  bool ReturnTypeUsesSRet(const CGFunctionInfo &FI);
+
+  /// ReturnTypeUsesFPRet - Return true iff the given type uses 'fpret' when
+  /// used as a return type.
+  bool ReturnTypeUsesFPRet(QualType ResultType);
+
+  /// ReturnTypeUsesFP2Ret - Return true iff the given type uses 'fp2ret' when
+  /// used as a return type.
+  bool ReturnTypeUsesFP2Ret(QualType ResultType);
+
+  /// ConstructAttributeList - Get the LLVM attributes and calling convention to
+  /// use for a particular function type.
+  ///
+  /// \param Info - The function type information.
+  /// \param TargetDecl - The decl these attributes are being constructed
+  /// for. If supplied the attributes applied to this decl may contribute to the
+  /// function attributes and calling convention.
+  /// \param PAL [out] - On return, the attribute list to use.
+  /// \param CallingConv [out] - On return, the LLVM calling convention to use.
+  void ConstructAttributeList(const CGFunctionInfo &Info,
+                              const Decl *TargetDecl,
+                              AttributeListType &PAL,
+                              unsigned &CallingConv);
+
+  StringRef getMangledName(GlobalDecl GD);
+  void getBlockMangledName(GlobalDecl GD, MangleBuffer &Buffer,
+                           const BlockDecl *BD);
+
+  void EmitTentativeDefinition(const VarDecl *D);
+
+  void EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired);
+
+  llvm::GlobalVariable::LinkageTypes
+  getFunctionLinkage(const FunctionDecl *FD);
+
+  void setFunctionLinkage(const FunctionDecl *FD, llvm::GlobalValue *V) {
+    V->setLinkage(getFunctionLinkage(FD));
+  }
+
+  /// getVTableLinkage - Return the appropriate linkage for the vtable, VTT,
+  /// and type information of the given class.
+  llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD);
+
+  /// GetTargetTypeStoreSize - Return the store size, in character units, of
+  /// the given LLVM type.
+  CharUnits GetTargetTypeStoreSize(llvm::Type *Ty) const;
+  
+  /// GetLLVMLinkageVarDefinition - Returns LLVM linkage for a global 
+  /// variable.
+  llvm::GlobalValue::LinkageTypes 
+  GetLLVMLinkageVarDefinition(const VarDecl *D,
+                              llvm::GlobalVariable *GV);
+  
+  std::vector<const CXXRecordDecl*> DeferredVTables;
+
+  /// Emit all the global annotations.
+  void EmitGlobalAnnotations();
+
+  /// Emit an annotation string.
+  llvm::Constant *EmitAnnotationString(llvm::StringRef Str);
+
+  /// Emit the annotation's translation unit.
+  llvm::Constant *EmitAnnotationUnit(SourceLocation Loc);
+
+  /// Emit the annotation line number.
+  llvm::Constant *EmitAnnotationLineNo(SourceLocation L);
+
+  /// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the
+  /// annotation information for a given GlobalValue. The annotation struct is
+  /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the
+  /// GlobalValue being annotated. The second field is the constant string
+  /// created from the AnnotateAttr's annotation. The third field is a constant
+  /// string containing the name of the translation unit. The fourth field is
+  /// the line number in the file of the annotated value declaration.
+  llvm::Constant *EmitAnnotateAttr(llvm::GlobalValue *GV,
+                                   const AnnotateAttr *AA,
+                                   SourceLocation L);
+
+  /// Add global annotations that are set on D, for the global GV. Those
+  /// annotations are emitted during finalization of the LLVM code.
+  void AddGlobalAnnotations(const ValueDecl *D, llvm::GlobalValue *GV);
+
+private:
+  llvm::GlobalValue *GetGlobalValue(StringRef Ref);
+
+  llvm::Constant *GetOrCreateLLVMFunction(StringRef MangledName,
+                                          llvm::Type *Ty,
+                                          GlobalDecl D,
+                                          bool ForVTable,
+                                          llvm::Attributes ExtraAttrs =
+                                            llvm::Attribute::None);
+  llvm::Constant *GetOrCreateLLVMGlobal(StringRef MangledName,
+                                        llvm::PointerType *PTy,
+                                        const VarDecl *D,
+                                        bool UnnamedAddr = false);
+
+  /// SetCommonAttributes - Set attributes which are common to any
+  /// form of a global definition (alias, Objective-C method,
+  /// function, global variable).
+  ///
+  /// NOTE: This should only be called for definitions.
+  void SetCommonAttributes(const Decl *D, llvm::GlobalValue *GV);
+
+  /// SetFunctionDefinitionAttributes - Set attributes for a global definition.
+  void SetFunctionDefinitionAttributes(const FunctionDecl *D,
+                                       llvm::GlobalValue *GV);
+
+  /// SetFunctionAttributes - Set function attributes for a function
+  /// declaration.
+  void SetFunctionAttributes(GlobalDecl GD,
+                             llvm::Function *F,
+                             bool IsIncompleteFunction);
+
+  /// EmitGlobal - Emit code for a singal global function or var decl. Forward
+  /// declarations are emitted lazily.
+  void EmitGlobal(GlobalDecl D);
+
+  void EmitGlobalDefinition(GlobalDecl D);
+
+  void EmitGlobalFunctionDefinition(GlobalDecl GD);
+  void EmitGlobalVarDefinition(const VarDecl *D);
+  llvm::Constant *MaybeEmitGlobalStdInitializerListInitializer(const VarDecl *D,
+                                                              const Expr *init);
+  void EmitAliasDefinition(GlobalDecl GD);
+  void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
+  void EmitObjCIvarInitializations(ObjCImplementationDecl *D);
+  
+  // C++ related functions.
+
+  bool TryEmitDefinitionAsAlias(GlobalDecl Alias, GlobalDecl Target);
+  bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D);
+
+  void EmitNamespace(const NamespaceDecl *D);
+  void EmitLinkageSpec(const LinkageSpecDecl *D);
+
+  /// EmitCXXConstructors - Emit constructors (base, complete) from a
+  /// C++ constructor Decl.
+  void EmitCXXConstructors(const CXXConstructorDecl *D);
+
+  /// EmitCXXConstructor - Emit a single constructor with the given type from
+  /// a C++ constructor Decl.
+  void EmitCXXConstructor(const CXXConstructorDecl *D, CXXCtorType Type);
+
+  /// EmitCXXDestructors - Emit destructors (base, complete) from a
+  /// C++ destructor Decl.
+  void EmitCXXDestructors(const CXXDestructorDecl *D);
+
+  /// EmitCXXDestructor - Emit a single destructor with the given type from
+  /// a C++ destructor Decl.
+  void EmitCXXDestructor(const CXXDestructorDecl *D, CXXDtorType Type);
+
+  /// EmitCXXGlobalInitFunc - Emit the function that initializes C++ globals.
+  void EmitCXXGlobalInitFunc();
+
+  /// EmitCXXGlobalDtorFunc - Emit the function that destroys C++ globals.
+  void EmitCXXGlobalDtorFunc();
+
+  /// EmitCXXGlobalVarDeclInitFunc - Emit the function that initializes the
+  /// specified global (if PerformInit is true) and registers its destructor.
+  void EmitCXXGlobalVarDeclInitFunc(const VarDecl *D,
+                                    llvm::GlobalVariable *Addr,
+                                    bool PerformInit);
+
+  // FIXME: Hardcoding priority here is gross.
+  void AddGlobalCtor(llvm::Function *Ctor, int Priority=65535);
+  void AddGlobalDtor(llvm::Function *Dtor, int Priority=65535);
+
+  /// EmitCtorList - Generates a global array of functions and priorities using
+  /// the given list and name. This array will have appending linkage and is
+  /// suitable for use as a LLVM constructor or destructor array.
+  void EmitCtorList(const CtorList &Fns, const char *GlobalName);
+
+  /// EmitFundamentalRTTIDescriptor - Emit the RTTI descriptors for the
+  /// given type.
+  void EmitFundamentalRTTIDescriptor(QualType Type);
+
+  /// EmitFundamentalRTTIDescriptors - Emit the RTTI descriptors for the
+  /// builtin types.
+  void EmitFundamentalRTTIDescriptors();
+
+  /// EmitDeferred - Emit any needed decls for which code generation
+  /// was deferred.
+  void EmitDeferred(void);
+
+  /// EmitLLVMUsed - Emit the llvm.used metadata used to force
+  /// references to global which may otherwise be optimized out.
+  void EmitLLVMUsed(void);
+
+  void EmitDeclMetadata();
+
+  /// EmitCoverageFile - Emit the llvm.gcov metadata used to tell LLVM where
+  /// to emit the .gcno and .gcda files in a way that persists in .bc files.
+  void EmitCoverageFile();
+
+  /// MayDeferGeneration - Determine if the given decl can be emitted
+  /// lazily; this is only relevant for definitions. The given decl
+  /// must be either a function or var decl.
+  bool MayDeferGeneration(const ValueDecl *D);
+
+  /// SimplifyPersonality - Check whether we can use a "simpler", more
+  /// core exceptions personality function.
+  void SimplifyPersonality();
+};
+}  // end namespace CodeGen
+}  // end namespace clang
+
+#endif