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llvm-project/clang/lib/CodeGen/CodeGenModule.h

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//===--- 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 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, i32, and i64
llvm::IntegerType *Int8Ty, *Int32Ty, *Int64Ty;
/// 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 &Features;
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;
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::Value*> StaticLocalDeclMap;
/// 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 isTriviallyRecursiveViaAsm(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(getLangOptions().ObjCAutoRefCount && ARCData != 0);
return *ARCData;
}
RREntrypoints &getRREntrypoints() const {
assert(RRData != 0);
return *RRData;
}
llvm::Value *getStaticLocalDeclAddress(const VarDecl *VD) {
return StaticLocalDeclMap[VD];
}
void setStaticLocalDeclAddress(const VarDecl *D,
llvm::GlobalVariable *GV) {
StaticLocalDeclMap[D] = GV;
}
CGDebugInfo *getModuleDebugInfo() { return DebugInfo; }
ASTContext &getContext() const { return Context; }
const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; }
const LangOptions &getLangOptions() const { return Features; }
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);
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!");
return llvm::GlobalValue::DefaultVisibility;
}
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 *);
/// GetStringForStringLiteral - Return the appropriate bytes for a string
/// literal, properly padded to match the literal type. If only the address of
/// a constant is needed consider using GetAddrOfConstantStringLiteral.
std::string GetStringForStringLiteral(const StringLiteral *E);
/// 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);
/// 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);
/// 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);
/// 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);
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();
void EmitCXXGlobalVarDeclInitFunc(const VarDecl *D,
llvm::GlobalVariable *Addr);
// 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
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