1 //===--- CodeGenModule.h - Per-Module state for LLVM CodeGen ----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This is the internal per-translation-unit state used for llvm translation.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H
15 #define LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H
17 #include "CGVTables.h"
18 #include "CodeGenTypeCache.h"
19 #include "CodeGenTypes.h"
20 #include "SanitizerMetadata.h"
21 #include "clang/AST/Attr.h"
22 #include "clang/AST/DeclCXX.h"
23 #include "clang/AST/DeclObjC.h"
24 #include "clang/AST/DeclOpenMP.h"
25 #include "clang/AST/GlobalDecl.h"
26 #include "clang/AST/Mangle.h"
27 #include "clang/Basic/ABI.h"
28 #include "clang/Basic/LangOptions.h"
29 #include "clang/Basic/Module.h"
30 #include "clang/Basic/SanitizerBlacklist.h"
31 #include "llvm/ADT/DenseMap.h"
32 #include "llvm/ADT/SetVector.h"
33 #include "llvm/ADT/SmallPtrSet.h"
34 #include "llvm/ADT/StringMap.h"
35 #include "llvm/IR/Module.h"
36 #include "llvm/IR/ValueHandle.h"
37 #include "llvm/Transforms/Utils/SanitizerStats.h"
48 class IndexedInstrProfReader;
57 class ObjCImplementationDecl;
58 class ObjCCategoryImplDecl;
59 class ObjCProtocolDecl;
73 class HeaderSearchOptions;
74 class PreprocessorOptions;
75 class DiagnosticsEngine;
77 class CXXDestructorDecl;
79 class CoverageSourceInfo;
84 class CodeGenFunction;
89 class CGOpenCLRuntime;
90 class CGOpenMPRuntime;
92 class BlockFieldFlags;
93 class FunctionArgList;
94 class CoverageMappingModuleGen;
95 class TargetCodeGenInfo;
97 enum ForDefinition_t : bool {
98 NotForDefinition = false,
102 struct OrderGlobalInits {
103 unsigned int priority;
104 unsigned int lex_order;
105 OrderGlobalInits(unsigned int p, unsigned int l)
106 : priority(p), lex_order(l) {}
108 bool operator==(const OrderGlobalInits &RHS) const {
109 return priority == RHS.priority && lex_order == RHS.lex_order;
112 bool operator<(const OrderGlobalInits &RHS) const {
113 return std::tie(priority, lex_order) <
114 std::tie(RHS.priority, RHS.lex_order);
118 struct ObjCEntrypoints {
119 ObjCEntrypoints() { memset(this, 0, sizeof(*this)); }
121 /// void objc_autoreleasePoolPop(void*);
122 llvm::Constant *objc_autoreleasePoolPop;
124 /// void *objc_autoreleasePoolPush(void);
125 llvm::Constant *objc_autoreleasePoolPush;
127 /// id objc_autorelease(id);
128 llvm::Constant *objc_autorelease;
130 /// id objc_autoreleaseReturnValue(id);
131 llvm::Constant *objc_autoreleaseReturnValue;
133 /// void objc_copyWeak(id *dest, id *src);
134 llvm::Constant *objc_copyWeak;
136 /// void objc_destroyWeak(id*);
137 llvm::Constant *objc_destroyWeak;
139 /// id objc_initWeak(id*, id);
140 llvm::Constant *objc_initWeak;
142 /// id objc_loadWeak(id*);
143 llvm::Constant *objc_loadWeak;
145 /// id objc_loadWeakRetained(id*);
146 llvm::Constant *objc_loadWeakRetained;
148 /// void objc_moveWeak(id *dest, id *src);
149 llvm::Constant *objc_moveWeak;
151 /// id objc_retain(id);
152 llvm::Constant *objc_retain;
154 /// id objc_retainAutorelease(id);
155 llvm::Constant *objc_retainAutorelease;
157 /// id objc_retainAutoreleaseReturnValue(id);
158 llvm::Constant *objc_retainAutoreleaseReturnValue;
160 /// id objc_retainAutoreleasedReturnValue(id);
161 llvm::Constant *objc_retainAutoreleasedReturnValue;
163 /// id objc_retainBlock(id);
164 llvm::Constant *objc_retainBlock;
166 /// void objc_release(id);
167 llvm::Constant *objc_release;
169 /// id objc_storeStrong(id*, id);
170 llvm::Constant *objc_storeStrong;
172 /// id objc_storeWeak(id*, id);
173 llvm::Constant *objc_storeWeak;
175 /// id objc_unsafeClaimAutoreleasedReturnValue(id);
176 llvm::Constant *objc_unsafeClaimAutoreleasedReturnValue;
178 /// A void(void) inline asm to use to mark that the return value of
179 /// a call will be immediately retain.
180 llvm::InlineAsm *retainAutoreleasedReturnValueMarker;
182 /// void clang.arc.use(...);
183 llvm::Constant *clang_arc_use;
186 /// This class records statistics on instrumentation based profiling.
187 class InstrProfStats {
188 uint32_t VisitedInMainFile;
189 uint32_t MissingInMainFile;
196 : VisitedInMainFile(0), MissingInMainFile(0), Visited(0), Missing(0),
198 /// Record that we've visited a function and whether or not that function was
199 /// in the main source file.
200 void addVisited(bool MainFile) {
205 /// Record that a function we've visited has no profile data.
206 void addMissing(bool MainFile) {
211 /// Record that a function we've visited has mismatched profile data.
212 void addMismatched(bool MainFile) { ++Mismatched; }
213 /// Whether or not the stats we've gathered indicate any potential problems.
214 bool hasDiagnostics() { return Missing || Mismatched; }
215 /// Report potential problems we've found to \c Diags.
216 void reportDiagnostics(DiagnosticsEngine &Diags, StringRef MainFile);
219 /// A pair of helper functions for a __block variable.
220 class BlockByrefHelpers : public llvm::FoldingSetNode {
221 // MSVC requires this type to be complete in order to process this
224 llvm::Constant *CopyHelper;
225 llvm::Constant *DisposeHelper;
227 /// The alignment of the field. This is important because
228 /// different offsets to the field within the byref struct need to
229 /// have different helper functions.
232 BlockByrefHelpers(CharUnits alignment) : Alignment(alignment) {}
233 BlockByrefHelpers(const BlockByrefHelpers &) = default;
234 virtual ~BlockByrefHelpers();
236 void Profile(llvm::FoldingSetNodeID &id) const {
237 id.AddInteger(Alignment.getQuantity());
240 virtual void profileImpl(llvm::FoldingSetNodeID &id) const = 0;
242 virtual bool needsCopy() const { return true; }
243 virtual void emitCopy(CodeGenFunction &CGF, Address dest, Address src) = 0;
245 virtual bool needsDispose() const { return true; }
246 virtual void emitDispose(CodeGenFunction &CGF, Address field) = 0;
249 /// This class organizes the cross-function state that is used while generating
251 class CodeGenModule : public CodeGenTypeCache {
252 CodeGenModule(const CodeGenModule &) = delete;
253 void operator=(const CodeGenModule &) = delete;
257 Structor() : Priority(0), Initializer(nullptr), AssociatedData(nullptr) {}
258 Structor(int Priority, llvm::Constant *Initializer,
259 llvm::Constant *AssociatedData)
260 : Priority(Priority), Initializer(Initializer),
261 AssociatedData(AssociatedData) {}
263 llvm::Constant *Initializer;
264 llvm::Constant *AssociatedData;
267 typedef std::vector<Structor> CtorList;
271 const LangOptions &LangOpts;
272 const HeaderSearchOptions &HeaderSearchOpts; // Only used for debug info.
273 const PreprocessorOptions &PreprocessorOpts; // Only used for debug info.
274 const CodeGenOptions &CodeGenOpts;
275 llvm::Module &TheModule;
276 DiagnosticsEngine &Diags;
277 const TargetInfo &Target;
278 std::unique_ptr<CGCXXABI> ABI;
279 llvm::LLVMContext &VMContext;
281 std::unique_ptr<CodeGenTBAA> TBAA;
283 mutable std::unique_ptr<TargetCodeGenInfo> TheTargetCodeGenInfo;
285 // This should not be moved earlier, since its initialization depends on some
286 // of the previous reference members being already initialized and also checks
287 // if TheTargetCodeGenInfo is NULL
290 /// Holds information about C++ vtables.
291 CodeGenVTables VTables;
293 std::unique_ptr<CGObjCRuntime> ObjCRuntime;
294 std::unique_ptr<CGOpenCLRuntime> OpenCLRuntime;
295 std::unique_ptr<CGOpenMPRuntime> OpenMPRuntime;
296 std::unique_ptr<CGCUDARuntime> CUDARuntime;
297 std::unique_ptr<CGDebugInfo> DebugInfo;
298 std::unique_ptr<ObjCEntrypoints> ObjCData;
299 llvm::MDNode *NoObjCARCExceptionsMetadata = nullptr;
300 std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader;
301 InstrProfStats PGOStats;
302 std::unique_ptr<llvm::SanitizerStatReport> SanStats;
304 // A set of references that have only been seen via a weakref so far. This is
305 // used to remove the weak of the reference if we ever see a direct reference
307 llvm::SmallPtrSet<llvm::GlobalValue*, 10> WeakRefReferences;
309 /// This contains all the decls which have definitions but/ which are deferred
310 /// for emission and therefore should only be output if they are actually
311 /// used. If a decl is in this, then it is known to have not been referenced
313 std::map<StringRef, GlobalDecl> DeferredDecls;
315 /// This is a list of deferred decls which we have seen that *are* actually
316 /// referenced. These get code generated when the module is done.
317 struct DeferredGlobal {
318 DeferredGlobal(llvm::GlobalValue *GV, GlobalDecl GD) : GV(GV), GD(GD) {}
319 llvm::TrackingVH<llvm::GlobalValue> GV;
322 std::vector<DeferredGlobal> DeferredDeclsToEmit;
323 void addDeferredDeclToEmit(llvm::GlobalValue *GV, GlobalDecl GD) {
324 DeferredDeclsToEmit.emplace_back(GV, GD);
327 /// List of alias we have emitted. Used to make sure that what they point to
328 /// is defined once we get to the end of the of the translation unit.
329 std::vector<GlobalDecl> Aliases;
331 typedef llvm::StringMap<llvm::TrackingVH<llvm::Constant> > ReplacementsTy;
332 ReplacementsTy Replacements;
334 /// List of global values to be replaced with something else. Used when we
335 /// want to replace a GlobalValue but can't identify it by its mangled name
336 /// anymore (because the name is already taken).
337 llvm::SmallVector<std::pair<llvm::GlobalValue *, llvm::Constant *>, 8>
338 GlobalValReplacements;
340 /// Set of global decls for which we already diagnosed mangled name conflict.
341 /// Required to not issue a warning (on a mangling conflict) multiple times
342 /// for the same decl.
343 llvm::DenseSet<GlobalDecl> DiagnosedConflictingDefinitions;
345 /// A queue of (optional) vtables to consider emitting.
346 std::vector<const CXXRecordDecl*> DeferredVTables;
348 /// List of global values which are required to be present in the object file;
349 /// bitcast to i8*. This is used for forcing visibility of symbols which may
350 /// otherwise be optimized out.
351 std::vector<llvm::WeakVH> LLVMUsed;
352 std::vector<llvm::WeakVH> LLVMCompilerUsed;
354 /// Store the list of global constructors and their respective priorities to
355 /// be emitted when the translation unit is complete.
356 CtorList GlobalCtors;
358 /// Store the list of global destructors and their respective priorities to be
359 /// emitted when the translation unit is complete.
360 CtorList GlobalDtors;
362 /// An ordered map of canonical GlobalDecls to their mangled names.
363 llvm::MapVector<GlobalDecl, StringRef> MangledDeclNames;
364 llvm::StringMap<GlobalDecl, llvm::BumpPtrAllocator> Manglings;
366 /// Global annotations.
367 std::vector<llvm::Constant*> Annotations;
369 /// Map used to get unique annotation strings.
370 llvm::StringMap<llvm::Constant*> AnnotationStrings;
372 llvm::StringMap<llvm::GlobalVariable *> CFConstantStringMap;
374 llvm::DenseMap<llvm::Constant *, llvm::GlobalVariable *> ConstantStringMap;
375 llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap;
376 llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap;
377 llvm::DenseMap<const Expr*, llvm::Constant *> MaterializedGlobalTemporaryMap;
379 llvm::DenseMap<QualType, llvm::Constant *> AtomicSetterHelperFnMap;
380 llvm::DenseMap<QualType, llvm::Constant *> AtomicGetterHelperFnMap;
382 /// Map used to get unique type descriptor constants for sanitizers.
383 llvm::DenseMap<QualType, llvm::Constant *> TypeDescriptorMap;
385 /// Map used to track internal linkage functions declared within
386 /// extern "C" regions.
387 typedef llvm::MapVector<IdentifierInfo *,
388 llvm::GlobalValue *> StaticExternCMap;
389 StaticExternCMap StaticExternCValues;
391 /// \brief thread_local variables defined or used in this TU.
392 std::vector<const VarDecl *> CXXThreadLocals;
394 /// \brief thread_local variables with initializers that need to run
395 /// before any thread_local variable in this TU is odr-used.
396 std::vector<llvm::Function *> CXXThreadLocalInits;
397 std::vector<const VarDecl *> CXXThreadLocalInitVars;
399 /// Global variables with initializers that need to run before main.
400 std::vector<llvm::Function *> CXXGlobalInits;
402 /// When a C++ decl with an initializer is deferred, null is
403 /// appended to CXXGlobalInits, and the index of that null is placed
404 /// here so that the initializer will be performed in the correct
405 /// order. Once the decl is emitted, the index is replaced with ~0U to ensure
406 /// that we don't re-emit the initializer.
407 llvm::DenseMap<const Decl*, unsigned> DelayedCXXInitPosition;
409 typedef std::pair<OrderGlobalInits, llvm::Function*> GlobalInitData;
411 struct GlobalInitPriorityCmp {
412 bool operator()(const GlobalInitData &LHS,
413 const GlobalInitData &RHS) const {
414 return LHS.first.priority < RHS.first.priority;
418 /// Global variables with initializers whose order of initialization is set by
419 /// init_priority attribute.
420 SmallVector<GlobalInitData, 8> PrioritizedCXXGlobalInits;
422 /// Global destructor functions and arguments that need to run on termination.
423 std::vector<std::pair<llvm::WeakVH,llvm::Constant*> > CXXGlobalDtors;
425 /// \brief The complete set of modules that has been imported.
426 llvm::SetVector<clang::Module *> ImportedModules;
428 /// \brief The set of modules for which the module initializers
429 /// have been emitted.
430 llvm::SmallPtrSet<clang::Module *, 16> EmittedModuleInitializers;
432 /// \brief A vector of metadata strings.
433 SmallVector<llvm::Metadata *, 16> LinkerOptionsMetadata;
435 /// @name Cache for Objective-C runtime types
438 /// Cached reference to the class for constant strings. This value has type
439 /// int * but is actually an Obj-C class pointer.
440 llvm::WeakVH CFConstantStringClassRef;
442 /// \brief The type used to describe the state of a fast enumeration in
443 /// Objective-C's for..in loop.
444 QualType ObjCFastEnumerationStateType;
448 /// Lazily create the Objective-C runtime
449 void createObjCRuntime();
451 void createOpenCLRuntime();
452 void createOpenMPRuntime();
453 void createCUDARuntime();
455 bool isTriviallyRecursive(const FunctionDecl *F);
456 bool shouldEmitFunction(GlobalDecl GD);
458 /// @name Cache for Blocks Runtime Globals
461 llvm::Constant *NSConcreteGlobalBlock = nullptr;
462 llvm::Constant *NSConcreteStackBlock = nullptr;
464 llvm::Constant *BlockObjectAssign = nullptr;
465 llvm::Constant *BlockObjectDispose = nullptr;
467 llvm::Type *BlockDescriptorType = nullptr;
468 llvm::Type *GenericBlockLiteralType = nullptr;
471 int GlobalUniqueCount;
474 /// void @llvm.lifetime.start(i64 %size, i8* nocapture <ptr>)
475 llvm::Constant *LifetimeStartFn = nullptr;
477 /// void @llvm.lifetime.end(i64 %size, i8* nocapture <ptr>)
478 llvm::Constant *LifetimeEndFn = nullptr;
480 GlobalDecl initializedGlobalDecl;
482 std::unique_ptr<SanitizerMetadata> SanitizerMD;
486 llvm::DenseMap<const Decl *, bool> DeferredEmptyCoverageMappingDecls;
488 std::unique_ptr<CoverageMappingModuleGen> CoverageMapping;
490 /// Mapping from canonical types to their metadata identifiers. We need to
491 /// maintain this mapping because identifiers may be formed from distinct
493 llvm::DenseMap<QualType, llvm::Metadata *> MetadataIdMap;
496 CodeGenModule(ASTContext &C, const HeaderSearchOptions &headersearchopts,
497 const PreprocessorOptions &ppopts,
498 const CodeGenOptions &CodeGenOpts, llvm::Module &M,
499 DiagnosticsEngine &Diags,
500 CoverageSourceInfo *CoverageInfo = nullptr);
506 /// Finalize LLVM code generation.
509 /// Return a reference to the configured Objective-C runtime.
510 CGObjCRuntime &getObjCRuntime() {
511 if (!ObjCRuntime) createObjCRuntime();
515 /// Return true iff an Objective-C runtime has been configured.
516 bool hasObjCRuntime() { return !!ObjCRuntime; }
518 /// Return a reference to the configured OpenCL runtime.
519 CGOpenCLRuntime &getOpenCLRuntime() {
520 assert(OpenCLRuntime != nullptr);
521 return *OpenCLRuntime;
524 /// Return a reference to the configured OpenMP runtime.
525 CGOpenMPRuntime &getOpenMPRuntime() {
526 assert(OpenMPRuntime != nullptr);
527 return *OpenMPRuntime;
530 /// Return a reference to the configured CUDA runtime.
531 CGCUDARuntime &getCUDARuntime() {
532 assert(CUDARuntime != nullptr);
536 ObjCEntrypoints &getObjCEntrypoints() const {
537 assert(ObjCData != nullptr);
541 InstrProfStats &getPGOStats() { return PGOStats; }
542 llvm::IndexedInstrProfReader *getPGOReader() const { return PGOReader.get(); }
544 CoverageMappingModuleGen *getCoverageMapping() const {
545 return CoverageMapping.get();
548 llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) {
549 return StaticLocalDeclMap[D];
551 void setStaticLocalDeclAddress(const VarDecl *D,
553 StaticLocalDeclMap[D] = C;
557 getOrCreateStaticVarDecl(const VarDecl &D,
558 llvm::GlobalValue::LinkageTypes Linkage);
560 llvm::GlobalVariable *getStaticLocalDeclGuardAddress(const VarDecl *D) {
561 return StaticLocalDeclGuardMap[D];
563 void setStaticLocalDeclGuardAddress(const VarDecl *D,
564 llvm::GlobalVariable *C) {
565 StaticLocalDeclGuardMap[D] = C;
568 bool lookupRepresentativeDecl(StringRef MangledName,
569 GlobalDecl &Result) const;
571 llvm::Constant *getAtomicSetterHelperFnMap(QualType Ty) {
572 return AtomicSetterHelperFnMap[Ty];
574 void setAtomicSetterHelperFnMap(QualType Ty,
575 llvm::Constant *Fn) {
576 AtomicSetterHelperFnMap[Ty] = Fn;
579 llvm::Constant *getAtomicGetterHelperFnMap(QualType Ty) {
580 return AtomicGetterHelperFnMap[Ty];
582 void setAtomicGetterHelperFnMap(QualType Ty,
583 llvm::Constant *Fn) {
584 AtomicGetterHelperFnMap[Ty] = Fn;
587 llvm::Constant *getTypeDescriptorFromMap(QualType Ty) {
588 return TypeDescriptorMap[Ty];
590 void setTypeDescriptorInMap(QualType Ty, llvm::Constant *C) {
591 TypeDescriptorMap[Ty] = C;
594 CGDebugInfo *getModuleDebugInfo() { return DebugInfo.get(); }
596 llvm::MDNode *getNoObjCARCExceptionsMetadata() {
597 if (!NoObjCARCExceptionsMetadata)
598 NoObjCARCExceptionsMetadata = llvm::MDNode::get(getLLVMContext(), None);
599 return NoObjCARCExceptionsMetadata;
602 ASTContext &getContext() const { return Context; }
603 const LangOptions &getLangOpts() const { return LangOpts; }
604 const HeaderSearchOptions &getHeaderSearchOpts()
605 const { return HeaderSearchOpts; }
606 const PreprocessorOptions &getPreprocessorOpts()
607 const { return PreprocessorOpts; }
608 const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; }
609 llvm::Module &getModule() const { return TheModule; }
610 DiagnosticsEngine &getDiags() const { return Diags; }
611 const llvm::DataLayout &getDataLayout() const {
612 return TheModule.getDataLayout();
614 const TargetInfo &getTarget() const { return Target; }
615 const llvm::Triple &getTriple() const { return Target.getTriple(); }
616 bool supportsCOMDAT() const;
617 void maybeSetTrivialComdat(const Decl &D, llvm::GlobalObject &GO);
619 CGCXXABI &getCXXABI() const { return *ABI; }
620 llvm::LLVMContext &getLLVMContext() { return VMContext; }
622 bool shouldUseTBAA() const { return TBAA != nullptr; }
624 const TargetCodeGenInfo &getTargetCodeGenInfo();
626 CodeGenTypes &getTypes() { return Types; }
628 CodeGenVTables &getVTables() { return VTables; }
630 ItaniumVTableContext &getItaniumVTableContext() {
631 return VTables.getItaniumVTableContext();
634 MicrosoftVTableContext &getMicrosoftVTableContext() {
635 return VTables.getMicrosoftVTableContext();
638 CtorList &getGlobalCtors() { return GlobalCtors; }
639 CtorList &getGlobalDtors() { return GlobalDtors; }
641 llvm::MDNode *getTBAAInfo(QualType QTy);
642 llvm::MDNode *getTBAAInfoForVTablePtr();
643 llvm::MDNode *getTBAAStructInfo(QualType QTy);
644 /// Return the path-aware tag for given base type, access node and offset.
645 llvm::MDNode *getTBAAStructTagInfo(QualType BaseTy, llvm::MDNode *AccessN,
648 bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor);
650 bool isPaddedAtomicType(QualType type);
651 bool isPaddedAtomicType(const AtomicType *type);
653 /// Decorate the instruction with a TBAA tag. For scalar TBAA, the tag
654 /// is the same as the type. For struct-path aware TBAA, the tag
655 /// is different from the type: base type, access type and offset.
656 /// When ConvertTypeToTag is true, we create a tag based on the scalar type.
657 void DecorateInstructionWithTBAA(llvm::Instruction *Inst,
658 llvm::MDNode *TBAAInfo,
659 bool ConvertTypeToTag = true);
661 /// Adds !invariant.barrier !tag to instruction
662 void DecorateInstructionWithInvariantGroup(llvm::Instruction *I,
663 const CXXRecordDecl *RD);
665 /// Emit the given number of characters as a value of type size_t.
666 llvm::ConstantInt *getSize(CharUnits numChars);
668 /// Set the visibility for the given LLVM GlobalValue.
669 void setGlobalVisibility(llvm::GlobalValue *GV, const NamedDecl *D) const;
671 /// Set the TLS mode for the given LLVM GlobalValue for the thread-local
672 /// variable declaration D.
673 void setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) const;
675 static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V) {
677 case DefaultVisibility: return llvm::GlobalValue::DefaultVisibility;
678 case HiddenVisibility: return llvm::GlobalValue::HiddenVisibility;
679 case ProtectedVisibility: return llvm::GlobalValue::ProtectedVisibility;
681 llvm_unreachable("unknown visibility!");
684 llvm::Constant *GetAddrOfGlobal(GlobalDecl GD,
685 ForDefinition_t IsForDefinition
688 /// Will return a global variable of the given type. If a variable with a
689 /// different type already exists then a new variable with the right type
690 /// will be created and all uses of the old variable will be replaced with a
691 /// bitcast to the new variable.
692 llvm::GlobalVariable *
693 CreateOrReplaceCXXRuntimeVariable(StringRef Name, llvm::Type *Ty,
694 llvm::GlobalValue::LinkageTypes Linkage);
697 CreateGlobalInitOrDestructFunction(llvm::FunctionType *ty, const Twine &name,
698 const CGFunctionInfo &FI,
699 SourceLocation Loc = SourceLocation(),
702 /// Return the address space of the underlying global variable for D, as
703 /// determined by its declaration. Normally this is the same as the address
704 /// space of D's type, but in CUDA, address spaces are associated with
705 /// declarations, not types.
706 unsigned GetGlobalVarAddressSpace(const VarDecl *D, unsigned AddrSpace);
708 /// Return the llvm::Constant for the address of the given global variable.
709 /// If Ty is non-null and if the global doesn't exist, then it will be created
710 /// with the specified type instead of whatever the normal requested type
711 /// would be. If IsForDefinition is true, it is guranteed that an actual
712 /// global with type Ty will be returned, not conversion of a variable with
713 /// the same mangled name but some other type.
714 llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D,
715 llvm::Type *Ty = nullptr,
716 ForDefinition_t IsForDefinition
719 /// Return the address of the given function. If Ty is non-null, then this
720 /// function will use the specified type if it has to create it.
721 llvm::Constant *GetAddrOfFunction(GlobalDecl GD, llvm::Type *Ty = nullptr,
722 bool ForVTable = false,
723 bool DontDefer = false,
724 ForDefinition_t IsForDefinition
727 /// Get the address of the RTTI descriptor for the given type.
728 llvm::Constant *GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH = false);
730 /// Get the address of a uuid descriptor .
731 ConstantAddress GetAddrOfUuidDescriptor(const CXXUuidofExpr* E);
733 /// Get the address of the thunk for the given global decl.
734 llvm::Constant *GetAddrOfThunk(GlobalDecl GD, const ThunkInfo &Thunk);
736 /// Get a reference to the target of VD.
737 ConstantAddress GetWeakRefReference(const ValueDecl *VD);
739 /// Returns the assumed alignment of an opaque pointer to the given class.
740 CharUnits getClassPointerAlignment(const CXXRecordDecl *CD);
742 /// Returns the assumed alignment of a virtual base of a class.
743 CharUnits getVBaseAlignment(CharUnits DerivedAlign,
744 const CXXRecordDecl *Derived,
745 const CXXRecordDecl *VBase);
747 /// Given a class pointer with an actual known alignment, and the
748 /// expected alignment of an object at a dynamic offset w.r.t that
749 /// pointer, return the alignment to assume at the offset.
750 CharUnits getDynamicOffsetAlignment(CharUnits ActualAlign,
751 const CXXRecordDecl *Class,
752 CharUnits ExpectedTargetAlign);
755 computeNonVirtualBaseClassOffset(const CXXRecordDecl *DerivedClass,
756 CastExpr::path_const_iterator Start,
757 CastExpr::path_const_iterator End);
759 /// Returns the offset from a derived class to a class. Returns null if the
762 GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl,
763 CastExpr::path_const_iterator PathBegin,
764 CastExpr::path_const_iterator PathEnd);
766 llvm::FoldingSet<BlockByrefHelpers> ByrefHelpersCache;
768 /// Fetches the global unique block count.
769 int getUniqueBlockCount() { return ++Block.GlobalUniqueCount; }
771 /// Fetches the type of a generic block descriptor.
772 llvm::Type *getBlockDescriptorType();
774 /// The type of a generic block literal.
775 llvm::Type *getGenericBlockLiteralType();
777 /// Gets the address of a block which requires no captures.
778 llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, StringRef Name);
780 /// Return a pointer to a constant CFString object for the given string.
781 ConstantAddress GetAddrOfConstantCFString(const StringLiteral *Literal);
783 /// Return a pointer to a constant NSString object for the given string. Or a
784 /// user defined String object as defined via
785 /// -fconstant-string-class=class_name option.
786 ConstantAddress GetAddrOfConstantString(const StringLiteral *Literal);
788 /// Return a constant array for the given string.
789 llvm::Constant *GetConstantArrayFromStringLiteral(const StringLiteral *E);
791 /// Return a pointer to a constant array for the given string literal.
793 GetAddrOfConstantStringFromLiteral(const StringLiteral *S,
794 StringRef Name = ".str");
796 /// Return a pointer to a constant array for the given ObjCEncodeExpr node.
798 GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *);
800 /// Returns a pointer to a character array containing the literal and a
801 /// terminating '\0' character. The result has pointer to array type.
803 /// \param GlobalName If provided, the name to use for the global (if one is
806 GetAddrOfConstantCString(const std::string &Str,
807 const char *GlobalName = nullptr);
809 /// Returns a pointer to a constant global variable for the given file-scope
810 /// compound literal expression.
811 ConstantAddress GetAddrOfConstantCompoundLiteral(const CompoundLiteralExpr*E);
813 /// \brief Returns a pointer to a global variable representing a temporary
814 /// with static or thread storage duration.
815 ConstantAddress GetAddrOfGlobalTemporary(const MaterializeTemporaryExpr *E,
818 /// \brief Retrieve the record type that describes the state of an
819 /// Objective-C fast enumeration loop (for..in).
820 QualType getObjCFastEnumerationStateType();
822 // Produce code for this constructor/destructor. This method doesn't try
823 // to apply any ABI rules about which other constructors/destructors
824 // are needed or if they are alias to each other.
825 llvm::Function *codegenCXXStructor(const CXXMethodDecl *MD,
828 /// Return the address of the constructor/destructor of the given type.
830 getAddrOfCXXStructor(const CXXMethodDecl *MD, StructorType Type,
831 const CGFunctionInfo *FnInfo = nullptr,
832 llvm::FunctionType *FnType = nullptr,
833 bool DontDefer = false,
834 ForDefinition_t IsForDefinition = NotForDefinition);
836 /// Given a builtin id for a function like "__builtin_fabsf", return a
837 /// Function* for "fabsf".
838 llvm::Constant *getBuiltinLibFunction(const FunctionDecl *FD,
841 llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys = None);
843 /// Emit code for a single top level declaration.
844 void EmitTopLevelDecl(Decl *D);
846 /// \brief Stored a deferred empty coverage mapping for an unused
847 /// and thus uninstrumented top level declaration.
848 void AddDeferredUnusedCoverageMapping(Decl *D);
850 /// \brief Remove the deferred empty coverage mapping as this
851 /// declaration is actually instrumented.
852 void ClearUnusedCoverageMapping(const Decl *D);
854 /// \brief Emit all the deferred coverage mappings
855 /// for the uninstrumented functions.
856 void EmitDeferredUnusedCoverageMappings();
858 /// Tell the consumer that this variable has been instantiated.
859 void HandleCXXStaticMemberVarInstantiation(VarDecl *VD);
861 /// \brief If the declaration has internal linkage but is inside an
862 /// extern "C" linkage specification, prepare to emit an alias for it
863 /// to the expected name.
864 template<typename SomeDecl>
865 void MaybeHandleStaticInExternC(const SomeDecl *D, llvm::GlobalValue *GV);
867 /// Add a global to a list to be added to the llvm.used metadata.
868 void addUsedGlobal(llvm::GlobalValue *GV);
870 /// Add a global to a list to be added to the llvm.compiler.used metadata.
871 void addCompilerUsedGlobal(llvm::GlobalValue *GV);
873 /// Add a destructor and object to add to the C++ global destructor function.
874 void AddCXXDtorEntry(llvm::Constant *DtorFn, llvm::Constant *Object) {
875 CXXGlobalDtors.emplace_back(DtorFn, Object);
878 /// Create a new runtime function with the specified type and name.
879 llvm::Constant *CreateRuntimeFunction(llvm::FunctionType *Ty,
881 llvm::AttributeSet ExtraAttrs =
882 llvm::AttributeSet());
883 /// Create a new compiler builtin function with the specified type and name.
884 llvm::Constant *CreateBuiltinFunction(llvm::FunctionType *Ty,
886 llvm::AttributeSet ExtraAttrs =
887 llvm::AttributeSet());
888 /// Create a new runtime global variable with the specified type and name.
889 llvm::Constant *CreateRuntimeVariable(llvm::Type *Ty,
892 ///@name Custom Blocks Runtime Interfaces
895 llvm::Constant *getNSConcreteGlobalBlock();
896 llvm::Constant *getNSConcreteStackBlock();
897 llvm::Constant *getBlockObjectAssign();
898 llvm::Constant *getBlockObjectDispose();
902 llvm::Constant *getLLVMLifetimeStartFn();
903 llvm::Constant *getLLVMLifetimeEndFn();
905 // Make sure that this type is translated.
906 void UpdateCompletedType(const TagDecl *TD);
908 llvm::Constant *getMemberPointerConstant(const UnaryOperator *e);
910 /// Try to emit the initializer for the given declaration as a constant;
911 /// returns 0 if the expression cannot be emitted as a constant.
912 llvm::Constant *EmitConstantInit(const VarDecl &D,
913 CodeGenFunction *CGF = nullptr);
915 /// Try to emit the given expression as a constant; returns 0 if the
916 /// expression cannot be emitted as a constant.
917 llvm::Constant *EmitConstantExpr(const Expr *E, QualType DestType,
918 CodeGenFunction *CGF = nullptr);
920 /// Emit the given constant value as a constant, in the type's scalar
922 llvm::Constant *EmitConstantValue(const APValue &Value, QualType DestType,
923 CodeGenFunction *CGF = nullptr);
925 /// Emit the given constant value as a constant, in the type's memory
927 llvm::Constant *EmitConstantValueForMemory(const APValue &Value,
929 CodeGenFunction *CGF = nullptr);
931 /// \brief Emit type info if type of an expression is a variably modified
932 /// type. Also emit proper debug info for cast types.
933 void EmitExplicitCastExprType(const ExplicitCastExpr *E,
934 CodeGenFunction *CGF = nullptr);
936 /// Return the result of value-initializing the given type, i.e. a null
937 /// expression of the given type. This is usually, but not always, an LLVM
939 llvm::Constant *EmitNullConstant(QualType T);
941 /// Return a null constant appropriate for zero-initializing a base class with
942 /// the given type. This is usually, but not always, an LLVM null constant.
943 llvm::Constant *EmitNullConstantForBase(const CXXRecordDecl *Record);
945 /// Emit a general error that something can't be done.
946 void Error(SourceLocation loc, StringRef error);
948 /// Print out an error that codegen doesn't support the specified stmt yet.
949 void ErrorUnsupported(const Stmt *S, const char *Type);
951 /// Print out an error that codegen doesn't support the specified decl yet.
952 void ErrorUnsupported(const Decl *D, const char *Type);
954 /// Set the attributes on the LLVM function for the given decl and function
955 /// info. This applies attributes necessary for handling the ABI as well as
956 /// user specified attributes like section.
957 void SetInternalFunctionAttributes(const Decl *D, llvm::Function *F,
958 const CGFunctionInfo &FI);
960 /// Set the LLVM function attributes (sext, zext, etc).
961 void SetLLVMFunctionAttributes(const Decl *D,
962 const CGFunctionInfo &Info,
965 /// Set the LLVM function attributes which only apply to a function
967 void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F);
969 /// Return true iff the given type uses 'sret' when used as a return type.
970 bool ReturnTypeUsesSRet(const CGFunctionInfo &FI);
972 /// Return true iff the given type uses an argument slot when 'sret' is used
973 /// as a return type.
974 bool ReturnSlotInterferesWithArgs(const CGFunctionInfo &FI);
976 /// Return true iff the given type uses 'fpret' when used as a return type.
977 bool ReturnTypeUsesFPRet(QualType ResultType);
979 /// Return true iff the given type uses 'fp2ret' when used as a return type.
980 bool ReturnTypeUsesFP2Ret(QualType ResultType);
982 /// Get the LLVM attributes and calling convention to use for a particular
985 /// \param Name - The function name.
986 /// \param Info - The function type information.
987 /// \param CalleeInfo - The callee information these attributes are being
988 /// constructed for. If valid, the attributes applied to this decl may
989 /// contribute to the function attributes and calling convention.
990 /// \param PAL [out] - On return, the attribute list to use.
991 /// \param CallingConv [out] - On return, the LLVM calling convention to use.
992 void ConstructAttributeList(StringRef Name, const CGFunctionInfo &Info,
993 CGCalleeInfo CalleeInfo, AttributeListType &PAL,
994 unsigned &CallingConv, bool AttrOnCallSite);
996 // Fills in the supplied string map with the set of target features for the
997 // passed in function.
998 void getFunctionFeatureMap(llvm::StringMap<bool> &FeatureMap,
999 const FunctionDecl *FD);
1001 StringRef getMangledName(GlobalDecl GD);
1002 StringRef getBlockMangledName(GlobalDecl GD, const BlockDecl *BD);
1004 void EmitTentativeDefinition(const VarDecl *D);
1006 void EmitVTable(CXXRecordDecl *Class);
1008 void RefreshTypeCacheForClass(const CXXRecordDecl *Class);
1010 /// \brief Appends Opts to the "Linker Options" metadata value.
1011 void AppendLinkerOptions(StringRef Opts);
1013 /// \brief Appends a detect mismatch command to the linker options.
1014 void AddDetectMismatch(StringRef Name, StringRef Value);
1016 /// \brief Appends a dependent lib to the "Linker Options" metadata value.
1017 void AddDependentLib(StringRef Lib);
1019 llvm::GlobalVariable::LinkageTypes getFunctionLinkage(GlobalDecl GD);
1021 void setFunctionLinkage(GlobalDecl GD, llvm::Function *F) {
1022 F->setLinkage(getFunctionLinkage(GD));
1025 /// Set the DLL storage class on F.
1026 void setFunctionDLLStorageClass(GlobalDecl GD, llvm::Function *F);
1028 /// Return the appropriate linkage for the vtable, VTT, and type information
1029 /// of the given class.
1030 llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD);
1032 /// Return the store size, in character units, of the given LLVM type.
1033 CharUnits GetTargetTypeStoreSize(llvm::Type *Ty) const;
1035 /// Returns LLVM linkage for a declarator.
1036 llvm::GlobalValue::LinkageTypes
1037 getLLVMLinkageForDeclarator(const DeclaratorDecl *D, GVALinkage Linkage,
1038 bool IsConstantVariable);
1040 /// Returns LLVM linkage for a declarator.
1041 llvm::GlobalValue::LinkageTypes
1042 getLLVMLinkageVarDefinition(const VarDecl *VD, bool IsConstant);
1044 /// Emit all the global annotations.
1045 void EmitGlobalAnnotations();
1047 /// Emit an annotation string.
1048 llvm::Constant *EmitAnnotationString(StringRef Str);
1050 /// Emit the annotation's translation unit.
1051 llvm::Constant *EmitAnnotationUnit(SourceLocation Loc);
1053 /// Emit the annotation line number.
1054 llvm::Constant *EmitAnnotationLineNo(SourceLocation L);
1056 /// Generate the llvm::ConstantStruct which contains the annotation
1057 /// information for a given GlobalValue. The annotation struct is
1058 /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the
1059 /// GlobalValue being annotated. The second field is the constant string
1060 /// created from the AnnotateAttr's annotation. The third field is a constant
1061 /// string containing the name of the translation unit. The fourth field is
1062 /// the line number in the file of the annotated value declaration.
1063 llvm::Constant *EmitAnnotateAttr(llvm::GlobalValue *GV,
1064 const AnnotateAttr *AA,
1067 /// Add global annotations that are set on D, for the global GV. Those
1068 /// annotations are emitted during finalization of the LLVM code.
1069 void AddGlobalAnnotations(const ValueDecl *D, llvm::GlobalValue *GV);
1071 bool isInSanitizerBlacklist(llvm::Function *Fn, SourceLocation Loc) const;
1073 bool isInSanitizerBlacklist(llvm::GlobalVariable *GV, SourceLocation Loc,
1075 StringRef Category = StringRef()) const;
1077 SanitizerMetadata *getSanitizerMetadata() {
1078 return SanitizerMD.get();
1081 void addDeferredVTable(const CXXRecordDecl *RD) {
1082 DeferredVTables.push_back(RD);
1085 /// Emit code for a singal global function or var decl. Forward declarations
1086 /// are emitted lazily.
1087 void EmitGlobal(GlobalDecl D);
1089 bool TryEmitDefinitionAsAlias(GlobalDecl Alias, GlobalDecl Target,
1091 bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D);
1093 /// Set attributes for a global definition.
1094 void setFunctionDefinitionAttributes(const FunctionDecl *D,
1097 llvm::GlobalValue *GetGlobalValue(StringRef Ref);
1099 /// Set attributes which are common to any form of a global definition (alias,
1100 /// Objective-C method, function, global variable).
1102 /// NOTE: This should only be called for definitions.
1103 void SetCommonAttributes(const Decl *D, llvm::GlobalValue *GV);
1105 /// Set attributes which must be preserved by an alias. This includes common
1106 /// attributes (i.e. it includes a call to SetCommonAttributes).
1108 /// NOTE: This should only be called for definitions.
1109 void setAliasAttributes(const Decl *D, llvm::GlobalValue *GV);
1111 void addReplacement(StringRef Name, llvm::Constant *C);
1113 void addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C);
1115 /// \brief Emit a code for threadprivate directive.
1116 /// \param D Threadprivate declaration.
1117 void EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D);
1119 /// \brief Emit a code for declare reduction construct.
1120 void EmitOMPDeclareReduction(const OMPDeclareReductionDecl *D,
1121 CodeGenFunction *CGF = nullptr);
1123 /// Returns whether the given record has hidden LTO visibility and therefore
1124 /// may participate in (single-module) CFI and whole-program vtable
1126 bool HasHiddenLTOVisibility(const CXXRecordDecl *RD);
1128 /// Emit type metadata for the given vtable using the given layout.
1129 void EmitVTableTypeMetadata(llvm::GlobalVariable *VTable,
1130 const VTableLayout &VTLayout);
1132 /// Generate a cross-DSO type identifier for MD.
1133 llvm::ConstantInt *CreateCrossDsoCfiTypeId(llvm::Metadata *MD);
1135 /// Create a metadata identifier for the given type. This may either be an
1136 /// MDString (for external identifiers) or a distinct unnamed MDNode (for
1137 /// internal identifiers).
1138 llvm::Metadata *CreateMetadataIdentifierForType(QualType T);
1140 /// Create and attach type metadata to the given function.
1141 void CreateFunctionTypeMetadata(const FunctionDecl *FD, llvm::Function *F);
1143 /// Returns whether this module needs the "all-vtables" type identifier.
1144 bool NeedAllVtablesTypeId() const;
1146 /// Create and attach type metadata for the given vtable.
1147 void AddVTableTypeMetadata(llvm::GlobalVariable *VTable, CharUnits Offset,
1148 const CXXRecordDecl *RD);
1150 /// \breif Get the declaration of std::terminate for the platform.
1151 llvm::Constant *getTerminateFn();
1153 llvm::SanitizerStatReport &getSanStats();
1156 createOpenCLIntToSamplerConversion(const Expr *E, CodeGenFunction &CGF);
1160 GetOrCreateLLVMFunction(StringRef MangledName, llvm::Type *Ty, GlobalDecl D,
1161 bool ForVTable, bool DontDefer = false,
1162 bool IsThunk = false,
1163 llvm::AttributeSet ExtraAttrs = llvm::AttributeSet(),
1164 ForDefinition_t IsForDefinition = NotForDefinition);
1166 llvm::Constant *GetOrCreateLLVMGlobal(StringRef MangledName,
1167 llvm::PointerType *PTy,
1169 ForDefinition_t IsForDefinition
1170 = NotForDefinition);
1172 void setNonAliasAttributes(const Decl *D, llvm::GlobalObject *GO);
1174 /// Set function attributes for a function declaration.
1175 void SetFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1176 bool IsIncompleteFunction, bool IsThunk);
1178 void EmitGlobalDefinition(GlobalDecl D, llvm::GlobalValue *GV = nullptr);
1180 void EmitGlobalFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1181 void EmitGlobalVarDefinition(const VarDecl *D, bool IsTentative = false);
1182 void EmitAliasDefinition(GlobalDecl GD);
1183 void emitIFuncDefinition(GlobalDecl GD);
1184 void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
1185 void EmitObjCIvarInitializations(ObjCImplementationDecl *D);
1187 // C++ related functions.
1189 void EmitDeclContext(const DeclContext *DC);
1190 void EmitLinkageSpec(const LinkageSpecDecl *D);
1191 void CompleteDIClassType(const CXXMethodDecl* D);
1193 /// \brief Emit the function that initializes C++ thread_local variables.
1194 void EmitCXXThreadLocalInitFunc();
1196 /// Emit the function that initializes C++ globals.
1197 void EmitCXXGlobalInitFunc();
1199 /// Emit the function that destroys C++ globals.
1200 void EmitCXXGlobalDtorFunc();
1202 /// Emit the function that initializes the specified global (if PerformInit is
1203 /// true) and registers its destructor.
1204 void EmitCXXGlobalVarDeclInitFunc(const VarDecl *D,
1205 llvm::GlobalVariable *Addr,
1208 void EmitPointerToInitFunc(const VarDecl *VD, llvm::GlobalVariable *Addr,
1209 llvm::Function *InitFunc, InitSegAttr *ISA);
1211 // FIXME: Hardcoding priority here is gross.
1212 void AddGlobalCtor(llvm::Function *Ctor, int Priority = 65535,
1213 llvm::Constant *AssociatedData = nullptr);
1214 void AddGlobalDtor(llvm::Function *Dtor, int Priority = 65535);
1216 /// EmitCtorList - Generates a global array of functions and priorities using
1217 /// the given list and name. This array will have appending linkage and is
1218 /// suitable for use as a LLVM constructor or destructor array. Clears Fns.
1219 void EmitCtorList(CtorList &Fns, const char *GlobalName);
1221 /// Emit any needed decls for which code generation was deferred.
1222 void EmitDeferred();
1224 /// Call replaceAllUsesWith on all pairs in Replacements.
1225 void applyReplacements();
1227 /// Call replaceAllUsesWith on all pairs in GlobalValReplacements.
1228 void applyGlobalValReplacements();
1230 void checkAliases();
1232 /// Emit any vtables which we deferred and still have a use for.
1233 void EmitDeferredVTables();
1235 /// Emit the llvm.used and llvm.compiler.used metadata.
1236 void emitLLVMUsed();
1238 /// \brief Emit the link options introduced by imported modules.
1239 void EmitModuleLinkOptions();
1241 /// \brief Emit aliases for internal-linkage declarations inside "C" language
1242 /// linkage specifications, giving them the "expected" name where possible.
1243 void EmitStaticExternCAliases();
1245 void EmitDeclMetadata();
1247 /// \brief Emit the Clang version as llvm.ident metadata.
1248 void EmitVersionIdentMetadata();
1250 /// Emits target specific Metadata for global declarations.
1251 void EmitTargetMetadata();
1253 /// Emit the llvm.gcov metadata used to tell LLVM where to emit the .gcno and
1254 /// .gcda files in a way that persists in .bc files.
1255 void EmitCoverageFile();
1257 /// Emits the initializer for a uuidof string.
1258 llvm::Constant *EmitUuidofInitializer(StringRef uuidstr);
1260 /// Determine whether the definition must be emitted; if this returns \c
1261 /// false, the definition can be emitted lazily if it's used.
1262 bool MustBeEmitted(const ValueDecl *D);
1264 /// Determine whether the definition can be emitted eagerly, or should be
1265 /// delayed until the end of the translation unit. This is relevant for
1266 /// definitions whose linkage can change, e.g. implicit function instantions
1267 /// which may later be explicitly instantiated.
1268 bool MayBeEmittedEagerly(const ValueDecl *D);
1270 /// Check whether we can use a "simpler", more core exceptions personality
1272 void SimplifyPersonality();
1274 } // end namespace CodeGen
1275 } // end namespace clang
1277 #endif // LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H