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Diffstat (limited to 'contrib/llvm/tools/clang/lib/CodeGen/CodeGenModule.h')
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diff --git a/contrib/llvm/tools/clang/lib/CodeGen/CodeGenModule.h b/contrib/llvm/tools/clang/lib/CodeGen/CodeGenModule.h new file mode 100644 index 000000000000..e38337814ebc --- /dev/null +++ b/contrib/llvm/tools/clang/lib/CodeGen/CodeGenModule.h @@ -0,0 +1,1344 @@ +//===--- 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 LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H +#define LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H + +#include "CGVTables.h" +#include "CodeGenTypeCache.h" +#include "CodeGenTypes.h" +#include "SanitizerMetadata.h" +#include "clang/AST/Attr.h" +#include "clang/AST/DeclCXX.h" +#include "clang/AST/DeclObjC.h" +#include "clang/AST/DeclOpenMP.h" +#include "clang/AST/GlobalDecl.h" +#include "clang/AST/Mangle.h" +#include "clang/Basic/ABI.h" +#include "clang/Basic/LangOptions.h" +#include "clang/Basic/Module.h" +#include "clang/Basic/SanitizerBlacklist.h" +#include "clang/Basic/XRayLists.h" +#include "llvm/ADT/DenseMap.h" +#include "llvm/ADT/SetVector.h" +#include "llvm/ADT/SmallPtrSet.h" +#include "llvm/ADT/StringMap.h" +#include "llvm/IR/Module.h" +#include "llvm/IR/ValueHandle.h" +#include "llvm/Transforms/Utils/SanitizerStats.h" + +namespace llvm { +class Module; +class Constant; +class ConstantInt; +class Function; +class GlobalValue; +class DataLayout; +class FunctionType; +class LLVMContext; +class IndexedInstrProfReader; +} + +namespace clang { +class ASTContext; +class AtomicType; +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 HeaderSearchOptions; +class PreprocessorOptions; +class DiagnosticsEngine; +class AnnotateAttr; +class CXXDestructorDecl; +class Module; +class CoverageSourceInfo; + +namespace CodeGen { + +class CallArgList; +class CodeGenFunction; +class CodeGenTBAA; +class CGCXXABI; +class CGDebugInfo; +class CGObjCRuntime; +class CGOpenCLRuntime; +class CGOpenMPRuntime; +class CGCUDARuntime; +class BlockFieldFlags; +class FunctionArgList; +class CoverageMappingModuleGen; +class TargetCodeGenInfo; + +enum ForDefinition_t : bool { + NotForDefinition = false, + ForDefinition = true +}; + +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 { + return std::tie(priority, lex_order) < + std::tie(RHS.priority, RHS.lex_order); + } +}; + +struct ObjCEntrypoints { + ObjCEntrypoints() { memset(this, 0, sizeof(*this)); } + + /// void objc_autoreleasePoolPop(void*); + llvm::Constant *objc_autoreleasePoolPop; + + /// void *objc_autoreleasePoolPush(void); + llvm::Constant *objc_autoreleasePoolPush; + + /// 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; + + /// void objc_storeStrong(id*, id); + llvm::Constant *objc_storeStrong; + + /// id objc_storeWeak(id*, id); + llvm::Constant *objc_storeWeak; + + /// id objc_unsafeClaimAutoreleasedReturnValue(id); + llvm::Constant *objc_unsafeClaimAutoreleasedReturnValue; + + /// A void(void) inline asm to use to mark that the return value of + /// a call will be immediately retain. + llvm::InlineAsm *retainAutoreleasedReturnValueMarker; + + /// void clang.arc.use(...); + llvm::Constant *clang_arc_use; +}; + +/// This class records statistics on instrumentation based profiling. +class InstrProfStats { + uint32_t VisitedInMainFile; + uint32_t MissingInMainFile; + uint32_t Visited; + uint32_t Missing; + uint32_t Mismatched; + +public: + InstrProfStats() + : VisitedInMainFile(0), MissingInMainFile(0), Visited(0), Missing(0), + Mismatched(0) {} + /// Record that we've visited a function and whether or not that function was + /// in the main source file. + void addVisited(bool MainFile) { + if (MainFile) + ++VisitedInMainFile; + ++Visited; + } + /// Record that a function we've visited has no profile data. + void addMissing(bool MainFile) { + if (MainFile) + ++MissingInMainFile; + ++Missing; + } + /// Record that a function we've visited has mismatched profile data. + void addMismatched(bool MainFile) { ++Mismatched; } + /// Whether or not the stats we've gathered indicate any potential problems. + bool hasDiagnostics() { return Missing || Mismatched; } + /// Report potential problems we've found to \c Diags. + void reportDiagnostics(DiagnosticsEngine &Diags, StringRef MainFile); +}; + +/// A pair of helper functions for a __block variable. +class BlockByrefHelpers : public llvm::FoldingSetNode { + // MSVC requires this type to be complete in order to process this + // header. +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; + + BlockByrefHelpers(CharUnits alignment) : Alignment(alignment) {} + BlockByrefHelpers(const BlockByrefHelpers &) = default; + virtual ~BlockByrefHelpers(); + + 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, Address dest, Address src) = 0; + + virtual bool needsDispose() const { return true; } + virtual void emitDispose(CodeGenFunction &CGF, Address field) = 0; +}; + +/// This class organizes the cross-function state that is used while generating +/// LLVM code. +class CodeGenModule : public CodeGenTypeCache { + CodeGenModule(const CodeGenModule &) = delete; + void operator=(const CodeGenModule &) = delete; + +public: + struct Structor { + Structor() : Priority(0), Initializer(nullptr), AssociatedData(nullptr) {} + Structor(int Priority, llvm::Constant *Initializer, + llvm::Constant *AssociatedData) + : Priority(Priority), Initializer(Initializer), + AssociatedData(AssociatedData) {} + int Priority; + llvm::Constant *Initializer; + llvm::Constant *AssociatedData; + }; + + typedef std::vector<Structor> CtorList; + +private: + ASTContext &Context; + const LangOptions &LangOpts; + const HeaderSearchOptions &HeaderSearchOpts; // Only used for debug info. + const PreprocessorOptions &PreprocessorOpts; // Only used for debug info. + const CodeGenOptions &CodeGenOpts; + llvm::Module &TheModule; + DiagnosticsEngine &Diags; + const TargetInfo &Target; + std::unique_ptr<CGCXXABI> ABI; + llvm::LLVMContext &VMContext; + + std::unique_ptr<CodeGenTBAA> TBAA; + + mutable std::unique_ptr<TargetCodeGenInfo> TheTargetCodeGenInfo; + + // This should not be moved earlier, since its initialization depends on some + // of the previous reference members being already initialized and also checks + // if TheTargetCodeGenInfo is NULL + CodeGenTypes Types; + + /// Holds information about C++ vtables. + CodeGenVTables VTables; + + std::unique_ptr<CGObjCRuntime> ObjCRuntime; + std::unique_ptr<CGOpenCLRuntime> OpenCLRuntime; + std::unique_ptr<CGOpenMPRuntime> OpenMPRuntime; + std::unique_ptr<CGCUDARuntime> CUDARuntime; + std::unique_ptr<CGDebugInfo> DebugInfo; + std::unique_ptr<ObjCEntrypoints> ObjCData; + llvm::MDNode *NoObjCARCExceptionsMetadata = nullptr; + std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader; + InstrProfStats PGOStats; + std::unique_ptr<llvm::SanitizerStatReport> SanStats; + + // 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; + + /// 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. + std::map<StringRef, GlobalDecl> DeferredDecls; + + /// 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; + void addDeferredDeclToEmit(GlobalDecl GD) { + DeferredDeclsToEmit.emplace_back(GD); + } + + /// List of alias we have emitted. Used to make sure that what they point to + /// is defined once we get to the end of the of the translation unit. + std::vector<GlobalDecl> Aliases; + + typedef llvm::StringMap<llvm::TrackingVH<llvm::Constant> > ReplacementsTy; + ReplacementsTy Replacements; + + /// List of global values to be replaced with something else. Used when we + /// want to replace a GlobalValue but can't identify it by its mangled name + /// anymore (because the name is already taken). + llvm::SmallVector<std::pair<llvm::GlobalValue *, llvm::Constant *>, 8> + GlobalValReplacements; + + /// Set of global decls for which we already diagnosed mangled name conflict. + /// Required to not issue a warning (on a mangling conflict) multiple times + /// for the same decl. + llvm::DenseSet<GlobalDecl> DiagnosedConflictingDefinitions; + + /// A queue of (optional) vtables to consider emitting. + std::vector<const CXXRecordDecl*> DeferredVTables; + + /// 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::WeakTrackingVH> LLVMUsed; + std::vector<llvm::WeakTrackingVH> LLVMCompilerUsed; + + /// Store the list of global constructors and their respective priorities to + /// be emitted when the translation unit is complete. + CtorList GlobalCtors; + + /// Store the list of global destructors and their respective priorities to be + /// emitted when the translation unit is complete. + CtorList GlobalDtors; + + /// An ordered map of canonical GlobalDecls to their mangled names. + llvm::MapVector<GlobalDecl, StringRef> MangledDeclNames; + llvm::StringMap<GlobalDecl, llvm::BumpPtrAllocator> Manglings; + + /// Global annotations. + std::vector<llvm::Constant*> Annotations; + + /// Map used to get unique annotation strings. + llvm::StringMap<llvm::Constant*> AnnotationStrings; + + llvm::StringMap<llvm::GlobalVariable *> CFConstantStringMap; + + llvm::DenseMap<llvm::Constant *, llvm::GlobalVariable *> ConstantStringMap; + llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap; + llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap; + llvm::DenseMap<const Expr*, llvm::Constant *> MaterializedGlobalTemporaryMap; + + llvm::DenseMap<QualType, llvm::Constant *> AtomicSetterHelperFnMap; + llvm::DenseMap<QualType, llvm::Constant *> AtomicGetterHelperFnMap; + + /// Map used to get unique type descriptor constants for sanitizers. + llvm::DenseMap<QualType, llvm::Constant *> TypeDescriptorMap; + + /// Map used to track internal linkage functions declared within + /// extern "C" regions. + typedef llvm::MapVector<IdentifierInfo *, + llvm::GlobalValue *> StaticExternCMap; + StaticExternCMap StaticExternCValues; + + /// \brief thread_local variables defined or used in this TU. + std::vector<const VarDecl *> CXXThreadLocals; + + /// \brief thread_local variables with initializers that need to run + /// before any thread_local variable in this TU is odr-used. + std::vector<llvm::Function *> CXXThreadLocalInits; + std::vector<const VarDecl *> CXXThreadLocalInitVars; + + /// Global variables with initializers that need to run before main. + std::vector<llvm::Function *> 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. Once the decl is emitted, the index is replaced with ~0U to ensure + /// that we don't re-emit the initializer. + llvm::DenseMap<const Decl*, unsigned> DelayedCXXInitPosition; + + typedef std::pair<OrderGlobalInits, llvm::Function*> GlobalInitData; + + struct GlobalInitPriorityCmp { + bool operator()(const GlobalInitData &LHS, + const GlobalInitData &RHS) const { + return LHS.first.priority < RHS.first.priority; + } + }; + + /// Global variables with initializers whose order of initialization is set by + /// init_priority attribute. + SmallVector<GlobalInitData, 8> PrioritizedCXXGlobalInits; + + /// Global destructor functions and arguments that need to run on termination. + std::vector<std::pair<llvm::WeakTrackingVH, llvm::Constant *>> CXXGlobalDtors; + + /// \brief The complete set of modules that has been imported. + llvm::SetVector<clang::Module *> ImportedModules; + + /// \brief The set of modules for which the module initializers + /// have been emitted. + llvm::SmallPtrSet<clang::Module *, 16> EmittedModuleInitializers; + + /// \brief A vector of metadata strings. + SmallVector<llvm::Metadata *, 16> LinkerOptionsMetadata; + + /// @name Cache for Objective-C runtime types + /// @{ + + /// Cached reference to the class for constant strings. This value has type + /// int * but is actually an Obj-C class pointer. + llvm::WeakTrackingVH CFConstantStringClassRef; + + /// \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 createOpenMPRuntime(); + void createCUDARuntime(); + + bool isTriviallyRecursive(const FunctionDecl *F); + bool shouldEmitFunction(GlobalDecl GD); + + /// Map used to be sure we don't emit the same CompoundLiteral twice. + llvm::DenseMap<const CompoundLiteralExpr *, llvm::GlobalVariable *> + EmittedCompoundLiterals; + + /// Map of the global blocks we've emitted, so that we don't have to re-emit + /// them if the constexpr evaluator gets aggressive. + llvm::DenseMap<const BlockExpr *, llvm::Constant *> EmittedGlobalBlocks; + + /// @name Cache for Blocks Runtime Globals + /// @{ + + llvm::Constant *NSConcreteGlobalBlock = nullptr; + llvm::Constant *NSConcreteStackBlock = nullptr; + + llvm::Constant *BlockObjectAssign = nullptr; + llvm::Constant *BlockObjectDispose = nullptr; + + llvm::Type *BlockDescriptorType = nullptr; + llvm::Type *GenericBlockLiteralType = nullptr; + + struct { + int GlobalUniqueCount; + } Block; + + /// void @llvm.lifetime.start(i64 %size, i8* nocapture <ptr>) + llvm::Constant *LifetimeStartFn = nullptr; + + /// void @llvm.lifetime.end(i64 %size, i8* nocapture <ptr>) + llvm::Constant *LifetimeEndFn = nullptr; + + GlobalDecl initializedGlobalDecl; + + std::unique_ptr<SanitizerMetadata> SanitizerMD; + + /// @} + + llvm::DenseMap<const Decl *, bool> DeferredEmptyCoverageMappingDecls; + + std::unique_ptr<CoverageMappingModuleGen> CoverageMapping; + + /// Mapping from canonical types to their metadata identifiers. We need to + /// maintain this mapping because identifiers may be formed from distinct + /// MDNodes. + llvm::DenseMap<QualType, llvm::Metadata *> MetadataIdMap; + +public: + CodeGenModule(ASTContext &C, const HeaderSearchOptions &headersearchopts, + const PreprocessorOptions &ppopts, + const CodeGenOptions &CodeGenOpts, llvm::Module &M, + DiagnosticsEngine &Diags, + CoverageSourceInfo *CoverageInfo = nullptr); + + ~CodeGenModule(); + + void clear(); + + /// Finalize LLVM code generation. + void Release(); + + /// Return a reference to the configured Objective-C runtime. + CGObjCRuntime &getObjCRuntime() { + if (!ObjCRuntime) createObjCRuntime(); + return *ObjCRuntime; + } + + /// Return true iff an Objective-C runtime has been configured. + bool hasObjCRuntime() { return !!ObjCRuntime; } + + /// Return a reference to the configured OpenCL runtime. + CGOpenCLRuntime &getOpenCLRuntime() { + assert(OpenCLRuntime != nullptr); + return *OpenCLRuntime; + } + + /// Return a reference to the configured OpenMP runtime. + CGOpenMPRuntime &getOpenMPRuntime() { + assert(OpenMPRuntime != nullptr); + return *OpenMPRuntime; + } + + /// Return a reference to the configured CUDA runtime. + CGCUDARuntime &getCUDARuntime() { + assert(CUDARuntime != nullptr); + return *CUDARuntime; + } + + ObjCEntrypoints &getObjCEntrypoints() const { + assert(ObjCData != nullptr); + return *ObjCData; + } + + // Version checking function, used to implement ObjC's @available: + // i32 @__isOSVersionAtLeast(i32, i32, i32) + llvm::Constant *IsOSVersionAtLeastFn = nullptr; + + InstrProfStats &getPGOStats() { return PGOStats; } + llvm::IndexedInstrProfReader *getPGOReader() const { return PGOReader.get(); } + + CoverageMappingModuleGen *getCoverageMapping() const { + return CoverageMapping.get(); + } + + llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) { + return StaticLocalDeclMap[D]; + } + void setStaticLocalDeclAddress(const VarDecl *D, + llvm::Constant *C) { + StaticLocalDeclMap[D] = C; + } + + llvm::Constant * + getOrCreateStaticVarDecl(const VarDecl &D, + llvm::GlobalValue::LinkageTypes Linkage); + + llvm::GlobalVariable *getStaticLocalDeclGuardAddress(const VarDecl *D) { + return StaticLocalDeclGuardMap[D]; + } + void setStaticLocalDeclGuardAddress(const VarDecl *D, + llvm::GlobalVariable *C) { + StaticLocalDeclGuardMap[D] = C; + } + + bool lookupRepresentativeDecl(StringRef MangledName, + GlobalDecl &Result) const; + + 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; + } + + llvm::Constant *getTypeDescriptorFromMap(QualType Ty) { + return TypeDescriptorMap[Ty]; + } + void setTypeDescriptorInMap(QualType Ty, llvm::Constant *C) { + TypeDescriptorMap[Ty] = C; + } + + CGDebugInfo *getModuleDebugInfo() { return DebugInfo.get(); } + + llvm::MDNode *getNoObjCARCExceptionsMetadata() { + if (!NoObjCARCExceptionsMetadata) + NoObjCARCExceptionsMetadata = llvm::MDNode::get(getLLVMContext(), None); + return NoObjCARCExceptionsMetadata; + } + + ASTContext &getContext() const { return Context; } + const LangOptions &getLangOpts() const { return LangOpts; } + const HeaderSearchOptions &getHeaderSearchOpts() + const { return HeaderSearchOpts; } + const PreprocessorOptions &getPreprocessorOpts() + const { return PreprocessorOpts; } + const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; } + llvm::Module &getModule() const { return TheModule; } + DiagnosticsEngine &getDiags() const { return Diags; } + const llvm::DataLayout &getDataLayout() const { + return TheModule.getDataLayout(); + } + const TargetInfo &getTarget() const { return Target; } + const llvm::Triple &getTriple() const { return Target.getTriple(); } + bool supportsCOMDAT() const; + void maybeSetTrivialComdat(const Decl &D, llvm::GlobalObject &GO); + + CGCXXABI &getCXXABI() const { return *ABI; } + llvm::LLVMContext &getLLVMContext() { return VMContext; } + + bool shouldUseTBAA() const { return TBAA != nullptr; } + + const TargetCodeGenInfo &getTargetCodeGenInfo(); + + CodeGenTypes &getTypes() { return Types; } + + CodeGenVTables &getVTables() { return VTables; } + + ItaniumVTableContext &getItaniumVTableContext() { + return VTables.getItaniumVTableContext(); + } + + MicrosoftVTableContext &getMicrosoftVTableContext() { + return VTables.getMicrosoftVTableContext(); + } + + CtorList &getGlobalCtors() { return GlobalCtors; } + CtorList &getGlobalDtors() { return GlobalDtors; } + + llvm::MDNode *getTBAAInfo(QualType QTy); + llvm::MDNode *getTBAAInfoForVTablePtr(); + llvm::MDNode *getTBAAStructInfo(QualType QTy); + /// Return the path-aware tag for given base type, access node and offset. + llvm::MDNode *getTBAAStructTagInfo(QualType BaseTy, llvm::MDNode *AccessN, + uint64_t O); + + bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor); + + bool isPaddedAtomicType(QualType type); + bool isPaddedAtomicType(const AtomicType *type); + + /// Decorate the instruction with a TBAA tag. For scalar TBAA, the tag + /// is the same as the type. For struct-path aware TBAA, the tag + /// is different from the type: base type, access type and offset. + /// When ConvertTypeToTag is true, we create a tag based on the scalar type. + void DecorateInstructionWithTBAA(llvm::Instruction *Inst, + llvm::MDNode *TBAAInfo, + bool ConvertTypeToTag = true); + + /// Adds !invariant.barrier !tag to instruction + void DecorateInstructionWithInvariantGroup(llvm::Instruction *I, + const CXXRecordDecl *RD); + + /// Emit the given number of characters as a value of type size_t. + llvm::ConstantInt *getSize(CharUnits numChars); + + /// Set the visibility for the given LLVM GlobalValue. + void setGlobalVisibility(llvm::GlobalValue *GV, const NamedDecl *D) const; + + /// Set the TLS mode for the given LLVM GlobalValue for the thread-local + /// variable declaration D. + void setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) 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, + ForDefinition_t IsForDefinition + = NotForDefinition); + + /// 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); + + llvm::Function * + CreateGlobalInitOrDestructFunction(llvm::FunctionType *ty, const Twine &name, + const CGFunctionInfo &FI, + SourceLocation Loc = SourceLocation(), + bool TLS = false); + + /// Return the address space of the underlying global variable for D, as + /// determined by its declaration. Normally this is the same as the address + /// space of D's type, but in CUDA, address spaces are associated with + /// declarations, not types. + unsigned GetGlobalVarAddressSpace(const VarDecl *D, unsigned AddrSpace); + + /// 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 created + /// with the specified type instead of whatever the normal requested type + /// would be. If IsForDefinition is true, it is guranteed that an actual + /// global with type Ty will be returned, not conversion of a variable with + /// the same mangled name but some other type. + llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D, + llvm::Type *Ty = nullptr, + ForDefinition_t IsForDefinition + = NotForDefinition); + + /// 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 = nullptr, + bool ForVTable = false, + bool DontDefer = false, + ForDefinition_t IsForDefinition + = NotForDefinition); + + /// Get the address of the RTTI descriptor for the given type. + llvm::Constant *GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH = false); + + /// Get the address of a uuid descriptor . + ConstantAddress GetAddrOfUuidDescriptor(const CXXUuidofExpr* E); + + /// Get the address of the thunk for the given global decl. + llvm::Constant *GetAddrOfThunk(GlobalDecl GD, const ThunkInfo &Thunk); + + /// Get a reference to the target of VD. + ConstantAddress GetWeakRefReference(const ValueDecl *VD); + + /// Returns the assumed alignment of an opaque pointer to the given class. + CharUnits getClassPointerAlignment(const CXXRecordDecl *CD); + + /// Returns the assumed alignment of a virtual base of a class. + CharUnits getVBaseAlignment(CharUnits DerivedAlign, + const CXXRecordDecl *Derived, + const CXXRecordDecl *VBase); + + /// Given a class pointer with an actual known alignment, and the + /// expected alignment of an object at a dynamic offset w.r.t that + /// pointer, return the alignment to assume at the offset. + CharUnits getDynamicOffsetAlignment(CharUnits ActualAlign, + const CXXRecordDecl *Class, + CharUnits ExpectedTargetAlign); + + CharUnits + computeNonVirtualBaseClassOffset(const CXXRecordDecl *DerivedClass, + CastExpr::path_const_iterator Start, + CastExpr::path_const_iterator End); + + /// 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); + + llvm::FoldingSet<BlockByrefHelpers> ByrefHelpersCache; + + /// Fetches the global unique block count. + int getUniqueBlockCount() { return ++Block.GlobalUniqueCount; } + + /// Fetches the type of a generic block descriptor. + llvm::Type *getBlockDescriptorType(); + + /// The type of a generic block literal. + llvm::Type *getGenericBlockLiteralType(); + + /// Gets the address of a block which requires no captures. + llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, StringRef Name); + + /// Returns the address of a block which requires no caputres, or null if + /// we've yet to emit the block for BE. + llvm::Constant *getAddrOfGlobalBlockIfEmitted(const BlockExpr *BE) { + return EmittedGlobalBlocks.lookup(BE); + } + + /// Notes that BE's global block is available via Addr. Asserts that BE + /// isn't already emitted. + void setAddrOfGlobalBlock(const BlockExpr *BE, llvm::Constant *Addr); + + /// Return a pointer to a constant CFString object for the given string. + ConstantAddress GetAddrOfConstantCFString(const StringLiteral *Literal); + + /// 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. + ConstantAddress GetAddrOfConstantString(const StringLiteral *Literal); + + /// Return a constant array for the given string. + llvm::Constant *GetConstantArrayFromStringLiteral(const StringLiteral *E); + + /// Return a pointer to a constant array for the given string literal. + ConstantAddress + GetAddrOfConstantStringFromLiteral(const StringLiteral *S, + StringRef Name = ".str"); + + /// Return a pointer to a constant array for the given ObjCEncodeExpr node. + ConstantAddress + GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *); + + /// 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). + ConstantAddress + GetAddrOfConstantCString(const std::string &Str, + const char *GlobalName = nullptr); + + /// Returns a pointer to a constant global variable for the given file-scope + /// compound literal expression. + ConstantAddress GetAddrOfConstantCompoundLiteral(const CompoundLiteralExpr*E); + + /// If it's been emitted already, returns the GlobalVariable corresponding to + /// a compound literal. Otherwise, returns null. + llvm::GlobalVariable * + getAddrOfConstantCompoundLiteralIfEmitted(const CompoundLiteralExpr *E); + + /// Notes that CLE's GlobalVariable is GV. Asserts that CLE isn't already + /// emitted. + void setAddrOfConstantCompoundLiteral(const CompoundLiteralExpr *CLE, + llvm::GlobalVariable *GV); + + /// \brief Returns a pointer to a global variable representing a temporary + /// with static or thread storage duration. + ConstantAddress GetAddrOfGlobalTemporary(const MaterializeTemporaryExpr *E, + const Expr *Inner); + + /// \brief Retrieve the record type that describes the state of an + /// Objective-C fast enumeration loop (for..in). + QualType getObjCFastEnumerationStateType(); + + // Produce code for this constructor/destructor. This method doesn't try + // to apply any ABI rules about which other constructors/destructors + // are needed or if they are alias to each other. + llvm::Function *codegenCXXStructor(const CXXMethodDecl *MD, + StructorType Type); + + /// Return the address of the constructor/destructor of the given type. + llvm::Constant * + getAddrOfCXXStructor(const CXXMethodDecl *MD, StructorType Type, + const CGFunctionInfo *FnInfo = nullptr, + llvm::FunctionType *FnType = nullptr, + bool DontDefer = false, + ForDefinition_t IsForDefinition = NotForDefinition); + + /// Given a builtin id for a function like "__builtin_fabsf", return a + /// Function* for "fabsf". + llvm::Constant *getBuiltinLibFunction(const FunctionDecl *FD, + unsigned BuiltinID); + + llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys = None); + + /// Emit code for a single top level declaration. + void EmitTopLevelDecl(Decl *D); + + /// \brief Stored a deferred empty coverage mapping for an unused + /// and thus uninstrumented top level declaration. + void AddDeferredUnusedCoverageMapping(Decl *D); + + /// \brief Remove the deferred empty coverage mapping as this + /// declaration is actually instrumented. + void ClearUnusedCoverageMapping(const Decl *D); + + /// \brief Emit all the deferred coverage mappings + /// for the uninstrumented functions. + void EmitDeferredUnusedCoverageMappings(); + + /// Tell the consumer that this variable has been instantiated. + void HandleCXXStaticMemberVarInstantiation(VarDecl *VD); + + /// \brief If the declaration has internal linkage but is inside an + /// extern "C" linkage specification, prepare to emit an alias for it + /// to the expected name. + template<typename SomeDecl> + void MaybeHandleStaticInExternC(const SomeDecl *D, llvm::GlobalValue *GV); + + /// Add a global to a list to be added to the llvm.used metadata. + void addUsedGlobal(llvm::GlobalValue *GV); + + /// Add a global to a list to be added to the llvm.compiler.used metadata. + void addCompilerUsedGlobal(llvm::GlobalValue *GV); + + /// Add a destructor and object to add to the C++ global destructor function. + void AddCXXDtorEntry(llvm::Constant *DtorFn, llvm::Constant *Object) { + CXXGlobalDtors.emplace_back(DtorFn, Object); + } + + /// Create a new runtime function with the specified type and name. + llvm::Constant * + CreateRuntimeFunction(llvm::FunctionType *Ty, StringRef Name, + llvm::AttributeList ExtraAttrs = llvm::AttributeList(), + bool Local = false); + + /// Create a new compiler builtin function with the specified type and name. + llvm::Constant * + CreateBuiltinFunction(llvm::FunctionType *Ty, StringRef Name, + llvm::AttributeList ExtraAttrs = llvm::AttributeList()); + /// 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(); + + ///@} + + llvm::Constant *getLLVMLifetimeStartFn(); + llvm::Constant *getLLVMLifetimeEndFn(); + + // Make sure that this type is translated. + void UpdateCompletedType(const TagDecl *TD); + + llvm::Constant *getMemberPointerConstant(const UnaryOperator *e); + + /// 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 = nullptr); + + /// 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 = nullptr); + + /// Emit the given constant value as a constant, in the type's scalar + /// representation. + llvm::Constant *EmitConstantValue(const APValue &Value, QualType DestType, + CodeGenFunction *CGF = nullptr); + + /// Emit the given constant value as a constant, in the type's memory + /// representation. + llvm::Constant *EmitConstantValueForMemory(const APValue &Value, + QualType DestType, + CodeGenFunction *CGF = nullptr); + + /// \brief Emit type info if type of an expression is a variably modified + /// type. Also emit proper debug info for cast types. + void EmitExplicitCastExprType(const ExplicitCastExpr *E, + CodeGenFunction *CGF = nullptr); + + /// 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); + + /// 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); + + /// Emit a general error that something can't be done. + void Error(SourceLocation loc, StringRef error); + + /// Print out an error that codegen doesn't support the specified stmt yet. + void ErrorUnsupported(const Stmt *S, const char *Type); + + /// Print out an error that codegen doesn't support the specified decl yet. + void ErrorUnsupported(const Decl *D, const char *Type); + + /// 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); + + /// Set the LLVM function attributes (sext, zext, etc). + void SetLLVMFunctionAttributes(const Decl *D, + const CGFunctionInfo &Info, + llvm::Function *F); + + /// Set the LLVM function attributes which only apply to a function + /// definition. + void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F); + + /// Return true iff the given type uses 'sret' when used as a return type. + bool ReturnTypeUsesSRet(const CGFunctionInfo &FI); + + /// Return true iff the given type uses an argument slot when 'sret' is used + /// as a return type. + bool ReturnSlotInterferesWithArgs(const CGFunctionInfo &FI); + + /// Return true iff the given type uses 'fpret' when used as a return type. + bool ReturnTypeUsesFPRet(QualType ResultType); + + /// Return true iff the given type uses 'fp2ret' when used as a return type. + bool ReturnTypeUsesFP2Ret(QualType ResultType); + + /// Get the LLVM attributes and calling convention to use for a particular + /// function type. + /// + /// \param Name - The function name. + /// \param Info - The function type information. + /// \param CalleeInfo - The callee information these attributes are being + /// constructed for. If valid, the attributes applied to this decl may + /// contribute to the function attributes and calling convention. + /// \param Attrs [out] - On return, the attribute list to use. + /// \param CallingConv [out] - On return, the LLVM calling convention to use. + void ConstructAttributeList(StringRef Name, const CGFunctionInfo &Info, + CGCalleeInfo CalleeInfo, + llvm::AttributeList &Attrs, unsigned &CallingConv, + bool AttrOnCallSite); + + /// Adds attributes to F according to our CodeGenOptions and LangOptions, as + /// though we had emitted it ourselves. We remove any attributes on F that + /// conflict with the attributes we add here. + /// + /// This is useful for adding attrs to bitcode modules that you want to link + /// with but don't control, such as CUDA's libdevice. When linking with such + /// a bitcode library, you might want to set e.g. its functions' + /// "unsafe-fp-math" attribute to match the attr of the functions you're + /// codegen'ing. Otherwise, LLVM will interpret the bitcode module's lack of + /// unsafe-fp-math attrs as tantamount to unsafe-fp-math=false, and then LLVM + /// will propagate unsafe-fp-math=false up to every transitive caller of a + /// function in the bitcode library! + /// + /// With the exception of fast-math attrs, this will only make the attributes + /// on the function more conservative. But it's unsafe to call this on a + /// function which relies on particular fast-math attributes for correctness. + /// It's up to you to ensure that this is safe. + void AddDefaultFnAttrs(llvm::Function &F); + + // Fills in the supplied string map with the set of target features for the + // passed in function. + void getFunctionFeatureMap(llvm::StringMap<bool> &FeatureMap, + const FunctionDecl *FD); + + StringRef getMangledName(GlobalDecl GD); + StringRef getBlockMangledName(GlobalDecl GD, const BlockDecl *BD); + + void EmitTentativeDefinition(const VarDecl *D); + + void EmitVTable(CXXRecordDecl *Class); + + void RefreshTypeCacheForClass(const CXXRecordDecl *Class); + + /// \brief Appends Opts to the "Linker Options" metadata value. + void AppendLinkerOptions(StringRef Opts); + + /// \brief Appends a detect mismatch command to the linker options. + void AddDetectMismatch(StringRef Name, StringRef Value); + + /// \brief Appends a dependent lib to the "Linker Options" metadata value. + void AddDependentLib(StringRef Lib); + + llvm::GlobalVariable::LinkageTypes getFunctionLinkage(GlobalDecl GD); + + void setFunctionLinkage(GlobalDecl GD, llvm::Function *F) { + F->setLinkage(getFunctionLinkage(GD)); + } + + /// Set the DLL storage class on F. + void setFunctionDLLStorageClass(GlobalDecl GD, llvm::Function *F); + + /// Return the appropriate linkage for the vtable, VTT, and type information + /// of the given class. + llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD); + + /// Return the store size, in character units, of the given LLVM type. + CharUnits GetTargetTypeStoreSize(llvm::Type *Ty) const; + + /// Returns LLVM linkage for a declarator. + llvm::GlobalValue::LinkageTypes + getLLVMLinkageForDeclarator(const DeclaratorDecl *D, GVALinkage Linkage, + bool IsConstantVariable); + + /// Returns LLVM linkage for a declarator. + llvm::GlobalValue::LinkageTypes + getLLVMLinkageVarDefinition(const VarDecl *VD, bool IsConstant); + + /// Emit all the global annotations. + void EmitGlobalAnnotations(); + + /// Emit an annotation string. + llvm::Constant *EmitAnnotationString(StringRef Str); + + /// Emit the annotation's translation unit. + llvm::Constant *EmitAnnotationUnit(SourceLocation Loc); + + /// Emit the annotation line number. + llvm::Constant *EmitAnnotationLineNo(SourceLocation L); + + /// 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); + + bool isInSanitizerBlacklist(llvm::Function *Fn, SourceLocation Loc) const; + + bool isInSanitizerBlacklist(llvm::GlobalVariable *GV, SourceLocation Loc, + QualType Ty, + StringRef Category = StringRef()) const; + + /// Imbue XRay attributes to a function, applying the always/never attribute + /// lists in the process. Returns true if we did imbue attributes this way, + /// false otherwise. + bool imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc, + StringRef Category = StringRef()) const; + + SanitizerMetadata *getSanitizerMetadata() { + return SanitizerMD.get(); + } + + void addDeferredVTable(const CXXRecordDecl *RD) { + DeferredVTables.push_back(RD); + } + + /// Emit code for a singal global function or var decl. Forward declarations + /// are emitted lazily. + void EmitGlobal(GlobalDecl D); + + bool TryEmitDefinitionAsAlias(GlobalDecl Alias, GlobalDecl Target, + bool InEveryTU); + bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D); + + /// Set attributes for a global definition. + void setFunctionDefinitionAttributes(const FunctionDecl *D, + llvm::Function *F); + + llvm::GlobalValue *GetGlobalValue(StringRef Ref); + + /// 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); + + /// Set attributes which must be preserved by an alias. This includes common + /// attributes (i.e. it includes a call to SetCommonAttributes). + /// + /// NOTE: This should only be called for definitions. + void setAliasAttributes(const Decl *D, llvm::GlobalValue *GV); + + void addReplacement(StringRef Name, llvm::Constant *C); + + void addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C); + + /// \brief Emit a code for threadprivate directive. + /// \param D Threadprivate declaration. + void EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D); + + /// \brief Emit a code for declare reduction construct. + void EmitOMPDeclareReduction(const OMPDeclareReductionDecl *D, + CodeGenFunction *CGF = nullptr); + + /// Returns whether the given record has hidden LTO visibility and therefore + /// may participate in (single-module) CFI and whole-program vtable + /// optimization. + bool HasHiddenLTOVisibility(const CXXRecordDecl *RD); + + /// Emit type metadata for the given vtable using the given layout. + void EmitVTableTypeMetadata(llvm::GlobalVariable *VTable, + const VTableLayout &VTLayout); + + /// Generate a cross-DSO type identifier for MD. + llvm::ConstantInt *CreateCrossDsoCfiTypeId(llvm::Metadata *MD); + + /// Create a metadata identifier for the given type. This may either be an + /// MDString (for external identifiers) or a distinct unnamed MDNode (for + /// internal identifiers). + llvm::Metadata *CreateMetadataIdentifierForType(QualType T); + + /// Create and attach type metadata to the given function. + void CreateFunctionTypeMetadata(const FunctionDecl *FD, llvm::Function *F); + + /// Returns whether this module needs the "all-vtables" type identifier. + bool NeedAllVtablesTypeId() const; + + /// Create and attach type metadata for the given vtable. + void AddVTableTypeMetadata(llvm::GlobalVariable *VTable, CharUnits Offset, + const CXXRecordDecl *RD); + + /// \brief Get the declaration of std::terminate for the platform. + llvm::Constant *getTerminateFn(); + + llvm::SanitizerStatReport &getSanStats(); + + llvm::Value * + createOpenCLIntToSamplerConversion(const Expr *E, CodeGenFunction &CGF); + + /// Get target specific null pointer. + /// \param T is the LLVM type of the null pointer. + /// \param QT is the clang QualType of the null pointer. + llvm::Constant *getNullPointer(llvm::PointerType *T, QualType QT); + +private: + llvm::Constant *GetOrCreateLLVMFunction( + StringRef MangledName, llvm::Type *Ty, GlobalDecl D, bool ForVTable, + bool DontDefer = false, bool IsThunk = false, + llvm::AttributeList ExtraAttrs = llvm::AttributeList(), + ForDefinition_t IsForDefinition = NotForDefinition); + + llvm::Constant *GetOrCreateLLVMGlobal(StringRef MangledName, + llvm::PointerType *PTy, + const VarDecl *D, + ForDefinition_t IsForDefinition + = NotForDefinition); + + void setNonAliasAttributes(const Decl *D, llvm::GlobalObject *GO); + + /// Set function attributes for a function declaration. + void SetFunctionAttributes(GlobalDecl GD, llvm::Function *F, + bool IsIncompleteFunction, bool IsThunk); + + void EmitGlobalDefinition(GlobalDecl D, llvm::GlobalValue *GV = nullptr); + + void EmitGlobalFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV); + void EmitGlobalVarDefinition(const VarDecl *D, bool IsTentative = false); + void EmitAliasDefinition(GlobalDecl GD); + void emitIFuncDefinition(GlobalDecl GD); + void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D); + void EmitObjCIvarInitializations(ObjCImplementationDecl *D); + + // C++ related functions. + + void EmitDeclContext(const DeclContext *DC); + void EmitLinkageSpec(const LinkageSpecDecl *D); + + /// \brief Emit the function that initializes C++ thread_local variables. + void EmitCXXThreadLocalInitFunc(); + + /// Emit the function that initializes C++ globals. + void EmitCXXGlobalInitFunc(); + + /// Emit the function that destroys C++ globals. + void EmitCXXGlobalDtorFunc(); + + /// 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); + + void EmitPointerToInitFunc(const VarDecl *VD, llvm::GlobalVariable *Addr, + llvm::Function *InitFunc, InitSegAttr *ISA); + + // FIXME: Hardcoding priority here is gross. + void AddGlobalCtor(llvm::Function *Ctor, int Priority = 65535, + llvm::Constant *AssociatedData = nullptr); + 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. Clears Fns. + void EmitCtorList(CtorList &Fns, const char *GlobalName); + + /// Emit any needed decls for which code generation was deferred. + void EmitDeferred(); + + /// Call replaceAllUsesWith on all pairs in Replacements. + void applyReplacements(); + + /// Call replaceAllUsesWith on all pairs in GlobalValReplacements. + void applyGlobalValReplacements(); + + void checkAliases(); + + /// Emit any vtables which we deferred and still have a use for. + void EmitDeferredVTables(); + + /// Emit a dummy function that reference a CoreFoundation symbol when + /// @available is used on Darwin. + void emitAtAvailableLinkGuard(); + + /// Emit the llvm.used and llvm.compiler.used metadata. + void emitLLVMUsed(); + + /// \brief Emit the link options introduced by imported modules. + void EmitModuleLinkOptions(); + + /// \brief Emit aliases for internal-linkage declarations inside "C" language + /// linkage specifications, giving them the "expected" name where possible. + void EmitStaticExternCAliases(); + + void EmitDeclMetadata(); + + /// \brief Emit the Clang version as llvm.ident metadata. + void EmitVersionIdentMetadata(); + + /// Emits target specific Metadata for global declarations. + void EmitTargetMetadata(); + + /// 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(); + + /// Emits the initializer for a uuidof string. + llvm::Constant *EmitUuidofInitializer(StringRef uuidstr); + + /// Determine whether the definition must be emitted; if this returns \c + /// false, the definition can be emitted lazily if it's used. + bool MustBeEmitted(const ValueDecl *D); + + /// Determine whether the definition can be emitted eagerly, or should be + /// delayed until the end of the translation unit. This is relevant for + /// definitions whose linkage can change, e.g. implicit function instantions + /// which may later be explicitly instantiated. + bool MayBeEmittedEagerly(const ValueDecl *D); + + /// Check whether we can use a "simpler", more core exceptions personality + /// function. + void SimplifyPersonality(); + + /// Helper function for ConstructAttributeList and AddDefaultFnAttrs. + /// Constructs an AttrList for a function with the given properties. + void ConstructDefaultFnAttrList(StringRef Name, bool HasOptnone, + bool AttrOnCallSite, + llvm::AttrBuilder &FuncAttrs); +}; +} // end namespace CodeGen +} // end namespace clang + +#endif // LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H |