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 struct OrderGlobalInits {
98 unsigned int priority;
99 unsigned int lex_order;
100 OrderGlobalInits(unsigned int p, unsigned int l)
101 : priority(p), lex_order(l) {}
103 bool operator==(const OrderGlobalInits &RHS) const {
104 return priority == RHS.priority && lex_order == RHS.lex_order;
107 bool operator<(const OrderGlobalInits &RHS) const {
108 return std::tie(priority, lex_order) <
109 std::tie(RHS.priority, RHS.lex_order);
113 struct ObjCEntrypoints {
114 ObjCEntrypoints() { memset(this, 0, sizeof(*this)); }
116 /// void objc_autoreleasePoolPop(void*);
117 llvm::Constant *objc_autoreleasePoolPop;
119 /// void *objc_autoreleasePoolPush(void);
120 llvm::Constant *objc_autoreleasePoolPush;
122 /// id objc_autorelease(id);
123 llvm::Constant *objc_autorelease;
125 /// id objc_autoreleaseReturnValue(id);
126 llvm::Constant *objc_autoreleaseReturnValue;
128 /// void objc_copyWeak(id *dest, id *src);
129 llvm::Constant *objc_copyWeak;
131 /// void objc_destroyWeak(id*);
132 llvm::Constant *objc_destroyWeak;
134 /// id objc_initWeak(id*, id);
135 llvm::Constant *objc_initWeak;
137 /// id objc_loadWeak(id*);
138 llvm::Constant *objc_loadWeak;
140 /// id objc_loadWeakRetained(id*);
141 llvm::Constant *objc_loadWeakRetained;
143 /// void objc_moveWeak(id *dest, id *src);
144 llvm::Constant *objc_moveWeak;
146 /// id objc_retain(id);
147 llvm::Constant *objc_retain;
149 /// id objc_retainAutorelease(id);
150 llvm::Constant *objc_retainAutorelease;
152 /// id objc_retainAutoreleaseReturnValue(id);
153 llvm::Constant *objc_retainAutoreleaseReturnValue;
155 /// id objc_retainAutoreleasedReturnValue(id);
156 llvm::Constant *objc_retainAutoreleasedReturnValue;
158 /// id objc_retainBlock(id);
159 llvm::Constant *objc_retainBlock;
161 /// void objc_release(id);
162 llvm::Constant *objc_release;
164 /// id objc_storeStrong(id*, id);
165 llvm::Constant *objc_storeStrong;
167 /// id objc_storeWeak(id*, id);
168 llvm::Constant *objc_storeWeak;
170 /// id objc_unsafeClaimAutoreleasedReturnValue(id);
171 llvm::Constant *objc_unsafeClaimAutoreleasedReturnValue;
173 /// A void(void) inline asm to use to mark that the return value of
174 /// a call will be immediately retain.
175 llvm::InlineAsm *retainAutoreleasedReturnValueMarker;
177 /// void clang.arc.use(...);
178 llvm::Constant *clang_arc_use;
181 /// This class records statistics on instrumentation based profiling.
182 class InstrProfStats {
183 uint32_t VisitedInMainFile;
184 uint32_t MissingInMainFile;
191 : VisitedInMainFile(0), MissingInMainFile(0), Visited(0), Missing(0),
193 /// Record that we've visited a function and whether or not that function was
194 /// in the main source file.
195 void addVisited(bool MainFile) {
200 /// Record that a function we've visited has no profile data.
201 void addMissing(bool MainFile) {
206 /// Record that a function we've visited has mismatched profile data.
207 void addMismatched(bool MainFile) { ++Mismatched; }
208 /// Whether or not the stats we've gathered indicate any potential problems.
209 bool hasDiagnostics() { return Missing || Mismatched; }
210 /// Report potential problems we've found to \c Diags.
211 void reportDiagnostics(DiagnosticsEngine &Diags, StringRef MainFile);
214 /// A pair of helper functions for a __block variable.
215 class BlockByrefHelpers : public llvm::FoldingSetNode {
216 // MSVC requires this type to be complete in order to process this
219 llvm::Constant *CopyHelper;
220 llvm::Constant *DisposeHelper;
222 /// The alignment of the field. This is important because
223 /// different offsets to the field within the byref struct need to
224 /// have different helper functions.
227 BlockByrefHelpers(CharUnits alignment) : Alignment(alignment) {}
228 BlockByrefHelpers(const BlockByrefHelpers &) = default;
229 virtual ~BlockByrefHelpers();
231 void Profile(llvm::FoldingSetNodeID &id) const {
232 id.AddInteger(Alignment.getQuantity());
235 virtual void profileImpl(llvm::FoldingSetNodeID &id) const = 0;
237 virtual bool needsCopy() const { return true; }
238 virtual void emitCopy(CodeGenFunction &CGF, Address dest, Address src) = 0;
240 virtual bool needsDispose() const { return true; }
241 virtual void emitDispose(CodeGenFunction &CGF, Address field) = 0;
244 /// This class organizes the cross-function state that is used while generating
246 class CodeGenModule : public CodeGenTypeCache {
247 CodeGenModule(const CodeGenModule &) = delete;
248 void operator=(const CodeGenModule &) = delete;
252 Structor() : Priority(0), Initializer(nullptr), AssociatedData(nullptr) {}
253 Structor(int Priority, llvm::Constant *Initializer,
254 llvm::Constant *AssociatedData)
255 : Priority(Priority), Initializer(Initializer),
256 AssociatedData(AssociatedData) {}
258 llvm::Constant *Initializer;
259 llvm::Constant *AssociatedData;
262 typedef std::vector<Structor> CtorList;
266 const LangOptions &LangOpts;
267 const HeaderSearchOptions &HeaderSearchOpts; // Only used for debug info.
268 const PreprocessorOptions &PreprocessorOpts; // Only used for debug info.
269 const CodeGenOptions &CodeGenOpts;
270 llvm::Module &TheModule;
271 DiagnosticsEngine &Diags;
272 const TargetInfo &Target;
273 std::unique_ptr<CGCXXABI> ABI;
274 llvm::LLVMContext &VMContext;
276 std::unique_ptr<CodeGenTBAA> TBAA;
278 mutable std::unique_ptr<TargetCodeGenInfo> TheTargetCodeGenInfo;
280 // This should not be moved earlier, since its initialization depends on some
281 // of the previous reference members being already initialized and also checks
282 // if TheTargetCodeGenInfo is NULL
285 /// Holds information about C++ vtables.
286 CodeGenVTables VTables;
288 std::unique_ptr<CGObjCRuntime> ObjCRuntime;
289 std::unique_ptr<CGOpenCLRuntime> OpenCLRuntime;
290 std::unique_ptr<CGOpenMPRuntime> OpenMPRuntime;
291 std::unique_ptr<CGCUDARuntime> CUDARuntime;
292 std::unique_ptr<CGDebugInfo> DebugInfo;
293 std::unique_ptr<ObjCEntrypoints> ObjCData;
294 llvm::MDNode *NoObjCARCExceptionsMetadata = nullptr;
295 std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader;
296 InstrProfStats PGOStats;
297 std::unique_ptr<llvm::SanitizerStatReport> SanStats;
299 // A set of references that have only been seen via a weakref so far. This is
300 // used to remove the weak of the reference if we ever see a direct reference
302 llvm::SmallPtrSet<llvm::GlobalValue*, 10> WeakRefReferences;
304 /// This contains all the decls which have definitions but/ which are deferred
305 /// for emission and therefore should only be output if they are actually
306 /// used. If a decl is in this, then it is known to have not been referenced
308 std::map<StringRef, GlobalDecl> DeferredDecls;
310 /// This is a list of deferred decls which we have seen that *are* actually
311 /// referenced. These get code generated when the module is done.
312 struct DeferredGlobal {
313 DeferredGlobal(llvm::GlobalValue *GV, GlobalDecl GD) : GV(GV), GD(GD) {}
314 llvm::TrackingVH<llvm::GlobalValue> GV;
317 std::vector<DeferredGlobal> DeferredDeclsToEmit;
318 void addDeferredDeclToEmit(llvm::GlobalValue *GV, GlobalDecl GD) {
319 DeferredDeclsToEmit.emplace_back(GV, GD);
322 /// List of alias we have emitted. Used to make sure that what they point to
323 /// is defined once we get to the end of the of the translation unit.
324 std::vector<GlobalDecl> Aliases;
326 typedef llvm::StringMap<llvm::TrackingVH<llvm::Constant> > ReplacementsTy;
327 ReplacementsTy Replacements;
329 /// List of global values to be replaced with something else. Used when we
330 /// want to replace a GlobalValue but can't identify it by its mangled name
331 /// anymore (because the name is already taken).
332 llvm::SmallVector<std::pair<llvm::GlobalValue *, llvm::Constant *>, 8>
333 GlobalValReplacements;
335 /// Set of global decls for which we already diagnosed mangled name conflict.
336 /// Required to not issue a warning (on a mangling conflict) multiple times
337 /// for the same decl.
338 llvm::DenseSet<GlobalDecl> DiagnosedConflictingDefinitions;
340 /// A queue of (optional) vtables to consider emitting.
341 std::vector<const CXXRecordDecl*> DeferredVTables;
343 /// List of global values which are required to be present in the object file;
344 /// bitcast to i8*. This is used for forcing visibility of symbols which may
345 /// otherwise be optimized out.
346 std::vector<llvm::WeakVH> LLVMUsed;
347 std::vector<llvm::WeakVH> LLVMCompilerUsed;
349 /// Store the list of global constructors and their respective priorities to
350 /// be emitted when the translation unit is complete.
351 CtorList GlobalCtors;
353 /// Store the list of global destructors and their respective priorities to be
354 /// emitted when the translation unit is complete.
355 CtorList GlobalDtors;
357 /// An ordered map of canonical GlobalDecls to their mangled names.
358 llvm::MapVector<GlobalDecl, StringRef> MangledDeclNames;
359 llvm::StringMap<GlobalDecl, llvm::BumpPtrAllocator> Manglings;
361 /// Global annotations.
362 std::vector<llvm::Constant*> Annotations;
364 /// Map used to get unique annotation strings.
365 llvm::StringMap<llvm::Constant*> AnnotationStrings;
367 llvm::StringMap<llvm::GlobalVariable *> CFConstantStringMap;
369 llvm::DenseMap<llvm::Constant *, llvm::GlobalVariable *> ConstantStringMap;
370 llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap;
371 llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap;
372 llvm::DenseMap<const Expr*, llvm::Constant *> MaterializedGlobalTemporaryMap;
374 llvm::DenseMap<QualType, llvm::Constant *> AtomicSetterHelperFnMap;
375 llvm::DenseMap<QualType, llvm::Constant *> AtomicGetterHelperFnMap;
377 /// Map used to get unique type descriptor constants for sanitizers.
378 llvm::DenseMap<QualType, llvm::Constant *> TypeDescriptorMap;
380 /// Map used to track internal linkage functions declared within
381 /// extern "C" regions.
382 typedef llvm::MapVector<IdentifierInfo *,
383 llvm::GlobalValue *> StaticExternCMap;
384 StaticExternCMap StaticExternCValues;
386 /// \brief thread_local variables defined or used in this TU.
387 std::vector<const VarDecl *> CXXThreadLocals;
389 /// \brief thread_local variables with initializers that need to run
390 /// before any thread_local variable in this TU is odr-used.
391 std::vector<llvm::Function *> CXXThreadLocalInits;
392 std::vector<const VarDecl *> CXXThreadLocalInitVars;
394 /// Global variables with initializers that need to run before main.
395 std::vector<llvm::Function *> CXXGlobalInits;
397 /// When a C++ decl with an initializer is deferred, null is
398 /// appended to CXXGlobalInits, and the index of that null is placed
399 /// here so that the initializer will be performed in the correct
400 /// order. Once the decl is emitted, the index is replaced with ~0U to ensure
401 /// that we don't re-emit the initializer.
402 llvm::DenseMap<const Decl*, unsigned> DelayedCXXInitPosition;
404 typedef std::pair<OrderGlobalInits, llvm::Function*> GlobalInitData;
406 struct GlobalInitPriorityCmp {
407 bool operator()(const GlobalInitData &LHS,
408 const GlobalInitData &RHS) const {
409 return LHS.first.priority < RHS.first.priority;
413 /// Global variables with initializers whose order of initialization is set by
414 /// init_priority attribute.
415 SmallVector<GlobalInitData, 8> PrioritizedCXXGlobalInits;
417 /// Global destructor functions and arguments that need to run on termination.
418 std::vector<std::pair<llvm::WeakVH,llvm::Constant*> > CXXGlobalDtors;
420 /// \brief The complete set of modules that has been imported.
421 llvm::SetVector<clang::Module *> ImportedModules;
423 /// \brief A vector of metadata strings.
424 SmallVector<llvm::Metadata *, 16> LinkerOptionsMetadata;
426 /// @name Cache for Objective-C runtime types
429 /// Cached reference to the class for constant strings. This value has type
430 /// int * but is actually an Obj-C class pointer.
431 llvm::WeakVH CFConstantStringClassRef;
433 /// Cached reference to the class for constant strings. This value has type
434 /// int * but is actually an Obj-C class pointer.
435 llvm::WeakVH ConstantStringClassRef;
437 /// \brief The LLVM type corresponding to NSConstantString.
438 llvm::StructType *NSConstantStringType = nullptr;
440 /// \brief The type used to describe the state of a fast enumeration in
441 /// Objective-C's for..in loop.
442 QualType ObjCFastEnumerationStateType;
446 /// Lazily create the Objective-C runtime
447 void createObjCRuntime();
449 void createOpenCLRuntime();
450 void createOpenMPRuntime();
451 void createCUDARuntime();
453 bool isTriviallyRecursive(const FunctionDecl *F);
454 bool shouldEmitFunction(GlobalDecl GD);
456 /// @name Cache for Blocks Runtime Globals
459 llvm::Constant *NSConcreteGlobalBlock = nullptr;
460 llvm::Constant *NSConcreteStackBlock = nullptr;
462 llvm::Constant *BlockObjectAssign = nullptr;
463 llvm::Constant *BlockObjectDispose = nullptr;
465 llvm::Type *BlockDescriptorType = nullptr;
466 llvm::Type *GenericBlockLiteralType = nullptr;
469 int GlobalUniqueCount;
472 /// void @llvm.lifetime.start(i64 %size, i8* nocapture <ptr>)
473 llvm::Constant *LifetimeStartFn = nullptr;
475 /// void @llvm.lifetime.end(i64 %size, i8* nocapture <ptr>)
476 llvm::Constant *LifetimeEndFn = nullptr;
478 GlobalDecl initializedGlobalDecl;
480 std::unique_ptr<SanitizerMetadata> SanitizerMD;
484 llvm::DenseMap<const Decl *, bool> DeferredEmptyCoverageMappingDecls;
486 std::unique_ptr<CoverageMappingModuleGen> CoverageMapping;
488 /// Mapping from canonical types to their metadata identifiers. We need to
489 /// maintain this mapping because identifiers may be formed from distinct
491 llvm::DenseMap<QualType, llvm::Metadata *> MetadataIdMap;
494 CodeGenModule(ASTContext &C, const HeaderSearchOptions &headersearchopts,
495 const PreprocessorOptions &ppopts,
496 const CodeGenOptions &CodeGenOpts, llvm::Module &M,
497 DiagnosticsEngine &Diags,
498 CoverageSourceInfo *CoverageInfo = nullptr);
504 /// Finalize LLVM code generation.
507 /// Return a reference to the configured Objective-C runtime.
508 CGObjCRuntime &getObjCRuntime() {
509 if (!ObjCRuntime) createObjCRuntime();
513 /// Return true iff an Objective-C runtime has been configured.
514 bool hasObjCRuntime() { return !!ObjCRuntime; }
516 /// Return a reference to the configured OpenCL runtime.
517 CGOpenCLRuntime &getOpenCLRuntime() {
518 assert(OpenCLRuntime != nullptr);
519 return *OpenCLRuntime;
522 /// Return a reference to the configured OpenMP runtime.
523 CGOpenMPRuntime &getOpenMPRuntime() {
524 assert(OpenMPRuntime != nullptr);
525 return *OpenMPRuntime;
528 /// Return a reference to the configured CUDA runtime.
529 CGCUDARuntime &getCUDARuntime() {
530 assert(CUDARuntime != nullptr);
534 ObjCEntrypoints &getObjCEntrypoints() const {
535 assert(ObjCData != nullptr);
539 InstrProfStats &getPGOStats() { return PGOStats; }
540 llvm::IndexedInstrProfReader *getPGOReader() const { return PGOReader.get(); }
542 CoverageMappingModuleGen *getCoverageMapping() const {
543 return CoverageMapping.get();
546 llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) {
547 return StaticLocalDeclMap[D];
549 void setStaticLocalDeclAddress(const VarDecl *D,
551 StaticLocalDeclMap[D] = C;
555 getOrCreateStaticVarDecl(const VarDecl &D,
556 llvm::GlobalValue::LinkageTypes Linkage);
558 llvm::GlobalVariable *getStaticLocalDeclGuardAddress(const VarDecl *D) {
559 return StaticLocalDeclGuardMap[D];
561 void setStaticLocalDeclGuardAddress(const VarDecl *D,
562 llvm::GlobalVariable *C) {
563 StaticLocalDeclGuardMap[D] = C;
566 bool lookupRepresentativeDecl(StringRef MangledName,
567 GlobalDecl &Result) const;
569 llvm::Constant *getAtomicSetterHelperFnMap(QualType Ty) {
570 return AtomicSetterHelperFnMap[Ty];
572 void setAtomicSetterHelperFnMap(QualType Ty,
573 llvm::Constant *Fn) {
574 AtomicSetterHelperFnMap[Ty] = Fn;
577 llvm::Constant *getAtomicGetterHelperFnMap(QualType Ty) {
578 return AtomicGetterHelperFnMap[Ty];
580 void setAtomicGetterHelperFnMap(QualType Ty,
581 llvm::Constant *Fn) {
582 AtomicGetterHelperFnMap[Ty] = Fn;
585 llvm::Constant *getTypeDescriptorFromMap(QualType Ty) {
586 return TypeDescriptorMap[Ty];
588 void setTypeDescriptorInMap(QualType Ty, llvm::Constant *C) {
589 TypeDescriptorMap[Ty] = C;
592 CGDebugInfo *getModuleDebugInfo() { return DebugInfo.get(); }
594 llvm::MDNode *getNoObjCARCExceptionsMetadata() {
595 if (!NoObjCARCExceptionsMetadata)
596 NoObjCARCExceptionsMetadata = llvm::MDNode::get(getLLVMContext(), None);
597 return NoObjCARCExceptionsMetadata;
600 ASTContext &getContext() const { return Context; }
601 const LangOptions &getLangOpts() const { return LangOpts; }
602 const HeaderSearchOptions &getHeaderSearchOpts()
603 const { return HeaderSearchOpts; }
604 const PreprocessorOptions &getPreprocessorOpts()
605 const { return PreprocessorOpts; }
606 const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; }
607 llvm::Module &getModule() const { return TheModule; }
608 DiagnosticsEngine &getDiags() const { return Diags; }
609 const llvm::DataLayout &getDataLayout() const {
610 return TheModule.getDataLayout();
612 const TargetInfo &getTarget() const { return Target; }
613 const llvm::Triple &getTriple() const;
614 bool supportsCOMDAT() const;
615 void maybeSetTrivialComdat(const Decl &D, llvm::GlobalObject &GO);
617 CGCXXABI &getCXXABI() const { return *ABI; }
618 llvm::LLVMContext &getLLVMContext() { return VMContext; }
620 bool shouldUseTBAA() const { return TBAA != nullptr; }
622 const TargetCodeGenInfo &getTargetCodeGenInfo();
624 CodeGenTypes &getTypes() { return Types; }
626 CodeGenVTables &getVTables() { return VTables; }
628 ItaniumVTableContext &getItaniumVTableContext() {
629 return VTables.getItaniumVTableContext();
632 MicrosoftVTableContext &getMicrosoftVTableContext() {
633 return VTables.getMicrosoftVTableContext();
636 CtorList &getGlobalCtors() { return GlobalCtors; }
637 CtorList &getGlobalDtors() { return GlobalDtors; }
639 llvm::MDNode *getTBAAInfo(QualType QTy);
640 llvm::MDNode *getTBAAInfoForVTablePtr();
641 llvm::MDNode *getTBAAStructInfo(QualType QTy);
642 /// Return the path-aware tag for given base type, access node and offset.
643 llvm::MDNode *getTBAAStructTagInfo(QualType BaseTy, llvm::MDNode *AccessN,
646 bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor);
648 bool isPaddedAtomicType(QualType type);
649 bool isPaddedAtomicType(const AtomicType *type);
651 /// Decorate the instruction with a TBAA tag. For scalar TBAA, the tag
652 /// is the same as the type. For struct-path aware TBAA, the tag
653 /// is different from the type: base type, access type and offset.
654 /// When ConvertTypeToTag is true, we create a tag based on the scalar type.
655 void DecorateInstructionWithTBAA(llvm::Instruction *Inst,
656 llvm::MDNode *TBAAInfo,
657 bool ConvertTypeToTag = true);
659 /// Adds !invariant.barrier !tag to instruction
660 void DecorateInstructionWithInvariantGroup(llvm::Instruction *I,
661 const CXXRecordDecl *RD);
663 /// Emit the given number of characters as a value of type size_t.
664 llvm::ConstantInt *getSize(CharUnits numChars);
666 /// Set the visibility for the given LLVM GlobalValue.
667 void setGlobalVisibility(llvm::GlobalValue *GV, const NamedDecl *D) const;
669 /// Set the TLS mode for the given LLVM GlobalValue for the thread-local
670 /// variable declaration D.
671 void setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) const;
673 static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V) {
675 case DefaultVisibility: return llvm::GlobalValue::DefaultVisibility;
676 case HiddenVisibility: return llvm::GlobalValue::HiddenVisibility;
677 case ProtectedVisibility: return llvm::GlobalValue::ProtectedVisibility;
679 llvm_unreachable("unknown visibility!");
682 llvm::Constant *GetAddrOfGlobal(GlobalDecl GD, bool IsForDefinition = false);
684 /// Will return a global variable of the given type. If a variable with a
685 /// different type already exists then a new variable with the right type
686 /// will be created and all uses of the old variable will be replaced with a
687 /// bitcast to the new variable.
688 llvm::GlobalVariable *
689 CreateOrReplaceCXXRuntimeVariable(StringRef Name, llvm::Type *Ty,
690 llvm::GlobalValue::LinkageTypes Linkage);
693 CreateGlobalInitOrDestructFunction(llvm::FunctionType *ty, const Twine &name,
694 const CGFunctionInfo &FI,
695 SourceLocation Loc = SourceLocation(),
698 /// Return the address space of the underlying global variable for D, as
699 /// determined by its declaration. Normally this is the same as the address
700 /// space of D's type, but in CUDA, address spaces are associated with
701 /// declarations, not types.
702 unsigned GetGlobalVarAddressSpace(const VarDecl *D, unsigned AddrSpace);
704 /// Return the llvm::Constant for the address of the given global variable.
705 /// If Ty is non-null and if the global doesn't exist, then it will be created
706 /// with the specified type instead of whatever the normal requested type
707 /// would be. If IsForDefinition is true, it is guranteed that an actual
708 /// global with type Ty will be returned, not conversion of a variable with
709 /// the same mangled name but some other type.
710 llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D,
711 llvm::Type *Ty = nullptr,
712 bool IsForDefinition = false);
714 /// Return the address of the given function. If Ty is non-null, then this
715 /// function will use the specified type if it has to create it.
716 llvm::Constant *GetAddrOfFunction(GlobalDecl GD, llvm::Type *Ty = nullptr,
717 bool ForVTable = false,
718 bool DontDefer = false,
719 bool IsForDefinition = false);
721 /// Get the address of the RTTI descriptor for the given type.
722 llvm::Constant *GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH = false);
724 /// Get the address of a uuid descriptor .
725 ConstantAddress GetAddrOfUuidDescriptor(const CXXUuidofExpr* E);
727 /// Get the address of the thunk for the given global decl.
728 llvm::Constant *GetAddrOfThunk(GlobalDecl GD, const ThunkInfo &Thunk);
730 /// Get a reference to the target of VD.
731 ConstantAddress GetWeakRefReference(const ValueDecl *VD);
733 /// Returns the assumed alignment of an opaque pointer to the given class.
734 CharUnits getClassPointerAlignment(const CXXRecordDecl *CD);
736 /// Returns the assumed alignment of a virtual base of a class.
737 CharUnits getVBaseAlignment(CharUnits DerivedAlign,
738 const CXXRecordDecl *Derived,
739 const CXXRecordDecl *VBase);
741 /// Given a class pointer with an actual known alignment, and the
742 /// expected alignment of an object at a dynamic offset w.r.t that
743 /// pointer, return the alignment to assume at the offset.
744 CharUnits getDynamicOffsetAlignment(CharUnits ActualAlign,
745 const CXXRecordDecl *Class,
746 CharUnits ExpectedTargetAlign);
749 computeNonVirtualBaseClassOffset(const CXXRecordDecl *DerivedClass,
750 CastExpr::path_const_iterator Start,
751 CastExpr::path_const_iterator End);
753 /// Returns the offset from a derived class to a class. Returns null if the
756 GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl,
757 CastExpr::path_const_iterator PathBegin,
758 CastExpr::path_const_iterator PathEnd);
760 llvm::FoldingSet<BlockByrefHelpers> ByrefHelpersCache;
762 /// Fetches the global unique block count.
763 int getUniqueBlockCount() { return ++Block.GlobalUniqueCount; }
765 /// Fetches the type of a generic block descriptor.
766 llvm::Type *getBlockDescriptorType();
768 /// The type of a generic block literal.
769 llvm::Type *getGenericBlockLiteralType();
771 /// Gets the address of a block which requires no captures.
772 llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, const char *);
774 /// Return a pointer to a constant CFString object for the given string.
775 ConstantAddress GetAddrOfConstantCFString(const StringLiteral *Literal);
777 /// Return a pointer to a constant NSString object for the given string. Or a
778 /// user defined String object as defined via
779 /// -fconstant-string-class=class_name option.
780 ConstantAddress GetAddrOfConstantString(const StringLiteral *Literal);
782 /// Return a constant array for the given string.
783 llvm::Constant *GetConstantArrayFromStringLiteral(const StringLiteral *E);
785 /// Return a pointer to a constant array for the given string literal.
787 GetAddrOfConstantStringFromLiteral(const StringLiteral *S,
788 StringRef Name = ".str");
790 /// Return a pointer to a constant array for the given ObjCEncodeExpr node.
792 GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *);
794 /// Returns a pointer to a character array containing the literal and a
795 /// terminating '\0' character. The result has pointer to array type.
797 /// \param GlobalName If provided, the name to use for the global (if one is
800 GetAddrOfConstantCString(const std::string &Str,
801 const char *GlobalName = nullptr);
803 /// Returns a pointer to a constant global variable for the given file-scope
804 /// compound literal expression.
805 ConstantAddress GetAddrOfConstantCompoundLiteral(const CompoundLiteralExpr*E);
807 /// \brief Returns a pointer to a global variable representing a temporary
808 /// with static or thread storage duration.
809 ConstantAddress GetAddrOfGlobalTemporary(const MaterializeTemporaryExpr *E,
812 /// \brief Retrieve the record type that describes the state of an
813 /// Objective-C fast enumeration loop (for..in).
814 QualType getObjCFastEnumerationStateType();
816 // Produce code for this constructor/destructor. This method doesn't try
817 // to apply any ABI rules about which other constructors/destructors
818 // are needed or if they are alias to each other.
819 llvm::Function *codegenCXXStructor(const CXXMethodDecl *MD,
822 /// Return the address of the constructor/destructor of the given type.
824 getAddrOfCXXStructor(const CXXMethodDecl *MD, StructorType Type,
825 const CGFunctionInfo *FnInfo = nullptr,
826 llvm::FunctionType *FnType = nullptr,
827 bool DontDefer = false, bool IsForDefinition = false);
829 /// Given a builtin id for a function like "__builtin_fabsf", return a
830 /// Function* for "fabsf".
831 llvm::Value *getBuiltinLibFunction(const FunctionDecl *FD,
834 llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys = None);
836 /// Emit code for a single top level declaration.
837 void EmitTopLevelDecl(Decl *D);
839 /// \brief Stored a deferred empty coverage mapping for an unused
840 /// and thus uninstrumented top level declaration.
841 void AddDeferredUnusedCoverageMapping(Decl *D);
843 /// \brief Remove the deferred empty coverage mapping as this
844 /// declaration is actually instrumented.
845 void ClearUnusedCoverageMapping(const Decl *D);
847 /// \brief Emit all the deferred coverage mappings
848 /// for the uninstrumented functions.
849 void EmitDeferredUnusedCoverageMappings();
851 /// Tell the consumer that this variable has been instantiated.
852 void HandleCXXStaticMemberVarInstantiation(VarDecl *VD);
854 /// \brief If the declaration has internal linkage but is inside an
855 /// extern "C" linkage specification, prepare to emit an alias for it
856 /// to the expected name.
857 template<typename SomeDecl>
858 void MaybeHandleStaticInExternC(const SomeDecl *D, llvm::GlobalValue *GV);
860 /// Add a global to a list to be added to the llvm.used metadata.
861 void addUsedGlobal(llvm::GlobalValue *GV);
863 /// Add a global to a list to be added to the llvm.compiler.used metadata.
864 void addCompilerUsedGlobal(llvm::GlobalValue *GV);
866 /// Add a destructor and object to add to the C++ global destructor function.
867 void AddCXXDtorEntry(llvm::Constant *DtorFn, llvm::Constant *Object) {
868 CXXGlobalDtors.emplace_back(DtorFn, Object);
871 /// Create a new runtime function with the specified type and name.
872 llvm::Constant *CreateRuntimeFunction(llvm::FunctionType *Ty,
874 llvm::AttributeSet ExtraAttrs =
875 llvm::AttributeSet());
876 /// Create a new compiler builtin function with the specified type and name.
877 llvm::Constant *CreateBuiltinFunction(llvm::FunctionType *Ty,
879 llvm::AttributeSet ExtraAttrs =
880 llvm::AttributeSet());
881 /// Create a new runtime global variable with the specified type and name.
882 llvm::Constant *CreateRuntimeVariable(llvm::Type *Ty,
885 ///@name Custom Blocks Runtime Interfaces
888 llvm::Constant *getNSConcreteGlobalBlock();
889 llvm::Constant *getNSConcreteStackBlock();
890 llvm::Constant *getBlockObjectAssign();
891 llvm::Constant *getBlockObjectDispose();
895 llvm::Constant *getLLVMLifetimeStartFn();
896 llvm::Constant *getLLVMLifetimeEndFn();
898 // Make sure that this type is translated.
899 void UpdateCompletedType(const TagDecl *TD);
901 llvm::Constant *getMemberPointerConstant(const UnaryOperator *e);
903 /// Try to emit the initializer for the given declaration as a constant;
904 /// returns 0 if the expression cannot be emitted as a constant.
905 llvm::Constant *EmitConstantInit(const VarDecl &D,
906 CodeGenFunction *CGF = nullptr);
908 /// Try to emit the given expression as a constant; returns 0 if the
909 /// expression cannot be emitted as a constant.
910 llvm::Constant *EmitConstantExpr(const Expr *E, QualType DestType,
911 CodeGenFunction *CGF = nullptr);
913 /// Emit the given constant value as a constant, in the type's scalar
915 llvm::Constant *EmitConstantValue(const APValue &Value, QualType DestType,
916 CodeGenFunction *CGF = nullptr);
918 /// Emit the given constant value as a constant, in the type's memory
920 llvm::Constant *EmitConstantValueForMemory(const APValue &Value,
922 CodeGenFunction *CGF = nullptr);
924 /// \brief Emit type info if type of an expression is a variably modified
925 /// type. Also emit proper debug info for cast types.
926 void EmitExplicitCastExprType(const ExplicitCastExpr *E,
927 CodeGenFunction *CGF = nullptr);
929 /// Return the result of value-initializing the given type, i.e. a null
930 /// expression of the given type. This is usually, but not always, an LLVM
932 llvm::Constant *EmitNullConstant(QualType T);
934 /// Return a null constant appropriate for zero-initializing a base class with
935 /// the given type. This is usually, but not always, an LLVM null constant.
936 llvm::Constant *EmitNullConstantForBase(const CXXRecordDecl *Record);
938 /// Emit a general error that something can't be done.
939 void Error(SourceLocation loc, StringRef error);
941 /// Print out an error that codegen doesn't support the specified stmt yet.
942 void ErrorUnsupported(const Stmt *S, const char *Type);
944 /// Print out an error that codegen doesn't support the specified decl yet.
945 void ErrorUnsupported(const Decl *D, const char *Type);
947 /// Set the attributes on the LLVM function for the given decl and function
948 /// info. This applies attributes necessary for handling the ABI as well as
949 /// user specified attributes like section.
950 void SetInternalFunctionAttributes(const Decl *D, llvm::Function *F,
951 const CGFunctionInfo &FI);
953 /// Set the LLVM function attributes (sext, zext, etc).
954 void SetLLVMFunctionAttributes(const Decl *D,
955 const CGFunctionInfo &Info,
958 /// Set the LLVM function attributes which only apply to a function
960 void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F);
962 /// Return true iff the given type uses 'sret' when used as a return type.
963 bool ReturnTypeUsesSRet(const CGFunctionInfo &FI);
965 /// Return true iff the given type uses an argument slot when 'sret' is used
966 /// as a return type.
967 bool ReturnSlotInterferesWithArgs(const CGFunctionInfo &FI);
969 /// Return true iff the given type uses 'fpret' when used as a return type.
970 bool ReturnTypeUsesFPRet(QualType ResultType);
972 /// Return true iff the given type uses 'fp2ret' when used as a return type.
973 bool ReturnTypeUsesFP2Ret(QualType ResultType);
975 /// Get the LLVM attributes and calling convention to use for a particular
978 /// \param Name - The function name.
979 /// \param Info - The function type information.
980 /// \param CalleeInfo - The callee information these attributes are being
981 /// constructed for. If valid, the attributes applied to this decl may
982 /// contribute to the function attributes and calling convention.
983 /// \param PAL [out] - On return, the attribute list to use.
984 /// \param CallingConv [out] - On return, the LLVM calling convention to use.
985 void ConstructAttributeList(StringRef Name, const CGFunctionInfo &Info,
986 CGCalleeInfo CalleeInfo, AttributeListType &PAL,
987 unsigned &CallingConv, bool AttrOnCallSite);
989 // Fills in the supplied string map with the set of target features for the
990 // passed in function.
991 void getFunctionFeatureMap(llvm::StringMap<bool> &FeatureMap,
992 const FunctionDecl *FD);
994 StringRef getMangledName(GlobalDecl GD);
995 StringRef getBlockMangledName(GlobalDecl GD, const BlockDecl *BD);
997 void EmitTentativeDefinition(const VarDecl *D);
999 void EmitVTable(CXXRecordDecl *Class);
1001 void RefreshTypeCacheForClass(const CXXRecordDecl *Class);
1003 /// \brief Appends Opts to the "Linker Options" metadata value.
1004 void AppendLinkerOptions(StringRef Opts);
1006 /// \brief Appends a detect mismatch command to the linker options.
1007 void AddDetectMismatch(StringRef Name, StringRef Value);
1009 /// \brief Appends a dependent lib to the "Linker Options" metadata value.
1010 void AddDependentLib(StringRef Lib);
1012 llvm::GlobalVariable::LinkageTypes getFunctionLinkage(GlobalDecl GD);
1014 void setFunctionLinkage(GlobalDecl GD, llvm::Function *F) {
1015 F->setLinkage(getFunctionLinkage(GD));
1018 /// Set the DLL storage class on F.
1019 void setFunctionDLLStorageClass(GlobalDecl GD, llvm::Function *F);
1021 /// Return the appropriate linkage for the vtable, VTT, and type information
1022 /// of the given class.
1023 llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD);
1025 /// Return the store size, in character units, of the given LLVM type.
1026 CharUnits GetTargetTypeStoreSize(llvm::Type *Ty) const;
1028 /// Returns LLVM linkage for a declarator.
1029 llvm::GlobalValue::LinkageTypes
1030 getLLVMLinkageForDeclarator(const DeclaratorDecl *D, GVALinkage Linkage,
1031 bool IsConstantVariable);
1033 /// Returns LLVM linkage for a declarator.
1034 llvm::GlobalValue::LinkageTypes
1035 getLLVMLinkageVarDefinition(const VarDecl *VD, bool IsConstant);
1037 /// Emit all the global annotations.
1038 void EmitGlobalAnnotations();
1040 /// Emit an annotation string.
1041 llvm::Constant *EmitAnnotationString(StringRef Str);
1043 /// Emit the annotation's translation unit.
1044 llvm::Constant *EmitAnnotationUnit(SourceLocation Loc);
1046 /// Emit the annotation line number.
1047 llvm::Constant *EmitAnnotationLineNo(SourceLocation L);
1049 /// Generate the llvm::ConstantStruct which contains the annotation
1050 /// information for a given GlobalValue. The annotation struct is
1051 /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the
1052 /// GlobalValue being annotated. The second field is the constant string
1053 /// created from the AnnotateAttr's annotation. The third field is a constant
1054 /// string containing the name of the translation unit. The fourth field is
1055 /// the line number in the file of the annotated value declaration.
1056 llvm::Constant *EmitAnnotateAttr(llvm::GlobalValue *GV,
1057 const AnnotateAttr *AA,
1060 /// Add global annotations that are set on D, for the global GV. Those
1061 /// annotations are emitted during finalization of the LLVM code.
1062 void AddGlobalAnnotations(const ValueDecl *D, llvm::GlobalValue *GV);
1064 bool isInSanitizerBlacklist(llvm::Function *Fn, SourceLocation Loc) const;
1066 bool isInSanitizerBlacklist(llvm::GlobalVariable *GV, SourceLocation Loc,
1068 StringRef Category = StringRef()) const;
1070 SanitizerMetadata *getSanitizerMetadata() {
1071 return SanitizerMD.get();
1074 void addDeferredVTable(const CXXRecordDecl *RD) {
1075 DeferredVTables.push_back(RD);
1078 /// Emit code for a singal global function or var decl. Forward declarations
1079 /// are emitted lazily.
1080 void EmitGlobal(GlobalDecl D);
1082 bool TryEmitDefinitionAsAlias(GlobalDecl Alias, GlobalDecl Target,
1084 bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D);
1086 /// Set attributes for a global definition.
1087 void setFunctionDefinitionAttributes(const FunctionDecl *D,
1090 llvm::GlobalValue *GetGlobalValue(StringRef Ref);
1092 /// Set attributes which are common to any form of a global definition (alias,
1093 /// Objective-C method, function, global variable).
1095 /// NOTE: This should only be called for definitions.
1096 void SetCommonAttributes(const Decl *D, llvm::GlobalValue *GV);
1098 /// Set attributes which must be preserved by an alias. This includes common
1099 /// attributes (i.e. it includes a call to SetCommonAttributes).
1101 /// NOTE: This should only be called for definitions.
1102 void setAliasAttributes(const Decl *D, llvm::GlobalValue *GV);
1104 void addReplacement(StringRef Name, llvm::Constant *C);
1106 void addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C);
1108 /// \brief Emit a code for threadprivate directive.
1109 /// \param D Threadprivate declaration.
1110 void EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D);
1112 /// \brief Emit a code for declare reduction construct.
1113 void EmitOMPDeclareReduction(const OMPDeclareReductionDecl *D,
1114 CodeGenFunction *CGF = nullptr);
1116 /// Returns whether the given record has hidden LTO visibility and therefore
1117 /// may participate in (single-module) CFI and whole-program vtable
1119 bool HasHiddenLTOVisibility(const CXXRecordDecl *RD);
1121 /// Emit type metadata for the given vtable using the given layout.
1122 void EmitVTableTypeMetadata(llvm::GlobalVariable *VTable,
1123 const VTableLayout &VTLayout);
1125 /// Generate a cross-DSO type identifier for MD.
1126 llvm::ConstantInt *CreateCrossDsoCfiTypeId(llvm::Metadata *MD);
1128 /// Create a metadata identifier for the given type. This may either be an
1129 /// MDString (for external identifiers) or a distinct unnamed MDNode (for
1130 /// internal identifiers).
1131 llvm::Metadata *CreateMetadataIdentifierForType(QualType T);
1133 /// Create and attach type metadata to the given function.
1134 void CreateFunctionTypeMetadata(const FunctionDecl *FD, llvm::Function *F);
1136 /// Returns whether this module needs the "all-vtables" type identifier.
1137 bool NeedAllVtablesTypeId() const;
1139 /// Create and attach type metadata for the given vtable.
1140 void AddVTableTypeMetadata(llvm::GlobalVariable *VTable, CharUnits Offset,
1141 const CXXRecordDecl *RD);
1143 /// \breif Get the declaration of std::terminate for the platform.
1144 llvm::Constant *getTerminateFn();
1146 llvm::SanitizerStatReport &getSanStats();
1150 GetOrCreateLLVMFunction(StringRef MangledName, llvm::Type *Ty, GlobalDecl D,
1151 bool ForVTable, bool DontDefer = false,
1152 bool IsThunk = false,
1153 llvm::AttributeSet ExtraAttrs = llvm::AttributeSet(),
1154 bool IsForDefinition = false);
1156 llvm::Constant *GetOrCreateLLVMGlobal(StringRef MangledName,
1157 llvm::PointerType *PTy,
1159 bool IsForDefinition = false);
1161 void setNonAliasAttributes(const Decl *D, llvm::GlobalObject *GO);
1163 /// Set function attributes for a function declaration.
1164 void SetFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1165 bool IsIncompleteFunction, bool IsThunk);
1167 void EmitGlobalDefinition(GlobalDecl D, llvm::GlobalValue *GV = nullptr);
1169 void EmitGlobalFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1170 void EmitGlobalVarDefinition(const VarDecl *D, bool IsTentative = false);
1171 void EmitAliasDefinition(GlobalDecl GD);
1172 void emitIFuncDefinition(GlobalDecl GD);
1173 void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
1174 void EmitObjCIvarInitializations(ObjCImplementationDecl *D);
1176 // C++ related functions.
1178 void EmitNamespace(const NamespaceDecl *D);
1179 void EmitLinkageSpec(const LinkageSpecDecl *D);
1180 void CompleteDIClassType(const CXXMethodDecl* D);
1182 /// \brief Emit the function that initializes C++ thread_local variables.
1183 void EmitCXXThreadLocalInitFunc();
1185 /// Emit the function that initializes C++ globals.
1186 void EmitCXXGlobalInitFunc();
1188 /// Emit the function that destroys C++ globals.
1189 void EmitCXXGlobalDtorFunc();
1191 /// Emit the function that initializes the specified global (if PerformInit is
1192 /// true) and registers its destructor.
1193 void EmitCXXGlobalVarDeclInitFunc(const VarDecl *D,
1194 llvm::GlobalVariable *Addr,
1197 void EmitPointerToInitFunc(const VarDecl *VD, llvm::GlobalVariable *Addr,
1198 llvm::Function *InitFunc, InitSegAttr *ISA);
1200 // FIXME: Hardcoding priority here is gross.
1201 void AddGlobalCtor(llvm::Function *Ctor, int Priority = 65535,
1202 llvm::Constant *AssociatedData = nullptr);
1203 void AddGlobalDtor(llvm::Function *Dtor, int Priority = 65535);
1205 /// Generates a global array of functions and priorities using the given list
1206 /// and name. This array will have appending linkage and is suitable for use
1207 /// as a LLVM constructor or destructor array.
1208 void EmitCtorList(const CtorList &Fns, const char *GlobalName);
1210 /// Emit any needed decls for which code generation was deferred.
1211 void EmitDeferred();
1213 /// Call replaceAllUsesWith on all pairs in Replacements.
1214 void applyReplacements();
1216 /// Call replaceAllUsesWith on all pairs in GlobalValReplacements.
1217 void applyGlobalValReplacements();
1219 void checkAliases();
1221 /// Emit any vtables which we deferred and still have a use for.
1222 void EmitDeferredVTables();
1224 /// Emit the llvm.used and llvm.compiler.used metadata.
1225 void emitLLVMUsed();
1227 /// \brief Emit the link options introduced by imported modules.
1228 void EmitModuleLinkOptions();
1230 /// \brief Emit aliases for internal-linkage declarations inside "C" language
1231 /// linkage specifications, giving them the "expected" name where possible.
1232 void EmitStaticExternCAliases();
1234 void EmitDeclMetadata();
1236 /// \brief Emit the Clang version as llvm.ident metadata.
1237 void EmitVersionIdentMetadata();
1239 /// Emits target specific Metadata for global declarations.
1240 void EmitTargetMetadata();
1242 /// Emit the llvm.gcov metadata used to tell LLVM where to emit the .gcno and
1243 /// .gcda files in a way that persists in .bc files.
1244 void EmitCoverageFile();
1246 /// Emits the initializer for a uuidof string.
1247 llvm::Constant *EmitUuidofInitializer(StringRef uuidstr);
1249 /// Determine whether the definition must be emitted; if this returns \c
1250 /// false, the definition can be emitted lazily if it's used.
1251 bool MustBeEmitted(const ValueDecl *D);
1253 /// Determine whether the definition can be emitted eagerly, or should be
1254 /// delayed until the end of the translation unit. This is relevant for
1255 /// definitions whose linkage can change, e.g. implicit function instantions
1256 /// which may later be explicitly instantiated.
1257 bool MayBeEmittedEagerly(const ValueDecl *D);
1259 /// Check whether we can use a "simpler", more core exceptions personality
1261 void SimplifyPersonality();
1263 } // end namespace CodeGen
1264 } // end namespace clang
1266 #endif // LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H