xref: /freebsd/contrib/llvm-project/clang/lib/CodeGen/CodeGenModule.h (revision 38a52bd3b5cac3da6f7f6eef3dd050e6aa08ebb3)
1 //===--- CodeGenModule.h - Per-Module state for LLVM CodeGen ----*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This is the internal per-translation-unit state used for llvm translation.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H
14 #define LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H
15 
16 #include "CGVTables.h"
17 #include "CodeGenTypeCache.h"
18 #include "CodeGenTypes.h"
19 #include "SanitizerMetadata.h"
20 #include "clang/AST/DeclCXX.h"
21 #include "clang/AST/DeclObjC.h"
22 #include "clang/AST/DeclOpenMP.h"
23 #include "clang/AST/GlobalDecl.h"
24 #include "clang/AST/Mangle.h"
25 #include "clang/Basic/ABI.h"
26 #include "clang/Basic/LangOptions.h"
27 #include "clang/Basic/Module.h"
28 #include "clang/Basic/NoSanitizeList.h"
29 #include "clang/Basic/TargetInfo.h"
30 #include "clang/Basic/XRayLists.h"
31 #include "clang/Lex/PreprocessorOptions.h"
32 #include "llvm/ADT/DenseMap.h"
33 #include "llvm/ADT/SetVector.h"
34 #include "llvm/ADT/SmallPtrSet.h"
35 #include "llvm/ADT/StringMap.h"
36 #include "llvm/IR/Module.h"
37 #include "llvm/IR/ValueHandle.h"
38 #include "llvm/Transforms/Utils/SanitizerStats.h"
39 
40 namespace llvm {
41 class Module;
42 class Constant;
43 class ConstantInt;
44 class Function;
45 class GlobalValue;
46 class DataLayout;
47 class FunctionType;
48 class LLVMContext;
49 class IndexedInstrProfReader;
50 }
51 
52 namespace clang {
53 class ASTContext;
54 class AtomicType;
55 class FunctionDecl;
56 class IdentifierInfo;
57 class ObjCImplementationDecl;
58 class ObjCEncodeExpr;
59 class BlockExpr;
60 class CharUnits;
61 class Decl;
62 class Expr;
63 class Stmt;
64 class StringLiteral;
65 class NamedDecl;
66 class ValueDecl;
67 class VarDecl;
68 class LangOptions;
69 class CodeGenOptions;
70 class HeaderSearchOptions;
71 class DiagnosticsEngine;
72 class AnnotateAttr;
73 class CXXDestructorDecl;
74 class Module;
75 class CoverageSourceInfo;
76 class InitSegAttr;
77 
78 namespace CodeGen {
79 
80 class CodeGenFunction;
81 class CodeGenTBAA;
82 class CGCXXABI;
83 class CGDebugInfo;
84 class CGObjCRuntime;
85 class CGOpenCLRuntime;
86 class CGOpenMPRuntime;
87 class CGCUDARuntime;
88 class CoverageMappingModuleGen;
89 class TargetCodeGenInfo;
90 
91 enum ForDefinition_t : bool {
92   NotForDefinition = false,
93   ForDefinition = true
94 };
95 
96 struct OrderGlobalInitsOrStermFinalizers {
97   unsigned int priority;
98   unsigned int lex_order;
99   OrderGlobalInitsOrStermFinalizers(unsigned int p, unsigned int l)
100       : priority(p), lex_order(l) {}
101 
102   bool operator==(const OrderGlobalInitsOrStermFinalizers &RHS) const {
103     return priority == RHS.priority && lex_order == RHS.lex_order;
104   }
105 
106   bool operator<(const OrderGlobalInitsOrStermFinalizers &RHS) const {
107     return std::tie(priority, lex_order) <
108            std::tie(RHS.priority, RHS.lex_order);
109   }
110 };
111 
112 struct ObjCEntrypoints {
113   ObjCEntrypoints() { memset(this, 0, sizeof(*this)); }
114 
115   /// void objc_alloc(id);
116   llvm::FunctionCallee objc_alloc;
117 
118   /// void objc_allocWithZone(id);
119   llvm::FunctionCallee objc_allocWithZone;
120 
121   /// void objc_alloc_init(id);
122   llvm::FunctionCallee objc_alloc_init;
123 
124   /// void objc_autoreleasePoolPop(void*);
125   llvm::FunctionCallee objc_autoreleasePoolPop;
126 
127   /// void objc_autoreleasePoolPop(void*);
128   /// Note this method is used when we are using exception handling
129   llvm::FunctionCallee objc_autoreleasePoolPopInvoke;
130 
131   /// void *objc_autoreleasePoolPush(void);
132   llvm::Function *objc_autoreleasePoolPush;
133 
134   /// id objc_autorelease(id);
135   llvm::Function *objc_autorelease;
136 
137   /// id objc_autorelease(id);
138   /// Note this is the runtime method not the intrinsic.
139   llvm::FunctionCallee objc_autoreleaseRuntimeFunction;
140 
141   /// id objc_autoreleaseReturnValue(id);
142   llvm::Function *objc_autoreleaseReturnValue;
143 
144   /// void objc_copyWeak(id *dest, id *src);
145   llvm::Function *objc_copyWeak;
146 
147   /// void objc_destroyWeak(id*);
148   llvm::Function *objc_destroyWeak;
149 
150   /// id objc_initWeak(id*, id);
151   llvm::Function *objc_initWeak;
152 
153   /// id objc_loadWeak(id*);
154   llvm::Function *objc_loadWeak;
155 
156   /// id objc_loadWeakRetained(id*);
157   llvm::Function *objc_loadWeakRetained;
158 
159   /// void objc_moveWeak(id *dest, id *src);
160   llvm::Function *objc_moveWeak;
161 
162   /// id objc_retain(id);
163   llvm::Function *objc_retain;
164 
165   /// id objc_retain(id);
166   /// Note this is the runtime method not the intrinsic.
167   llvm::FunctionCallee objc_retainRuntimeFunction;
168 
169   /// id objc_retainAutorelease(id);
170   llvm::Function *objc_retainAutorelease;
171 
172   /// id objc_retainAutoreleaseReturnValue(id);
173   llvm::Function *objc_retainAutoreleaseReturnValue;
174 
175   /// id objc_retainAutoreleasedReturnValue(id);
176   llvm::Function *objc_retainAutoreleasedReturnValue;
177 
178   /// id objc_retainBlock(id);
179   llvm::Function *objc_retainBlock;
180 
181   /// void objc_release(id);
182   llvm::Function *objc_release;
183 
184   /// void objc_release(id);
185   /// Note this is the runtime method not the intrinsic.
186   llvm::FunctionCallee objc_releaseRuntimeFunction;
187 
188   /// void objc_storeStrong(id*, id);
189   llvm::Function *objc_storeStrong;
190 
191   /// id objc_storeWeak(id*, id);
192   llvm::Function *objc_storeWeak;
193 
194   /// id objc_unsafeClaimAutoreleasedReturnValue(id);
195   llvm::Function *objc_unsafeClaimAutoreleasedReturnValue;
196 
197   /// A void(void) inline asm to use to mark that the return value of
198   /// a call will be immediately retain.
199   llvm::InlineAsm *retainAutoreleasedReturnValueMarker;
200 
201   /// void clang.arc.use(...);
202   llvm::Function *clang_arc_use;
203 
204   /// void clang.arc.noop.use(...);
205   llvm::Function *clang_arc_noop_use;
206 };
207 
208 /// This class records statistics on instrumentation based profiling.
209 class InstrProfStats {
210   uint32_t VisitedInMainFile;
211   uint32_t MissingInMainFile;
212   uint32_t Visited;
213   uint32_t Missing;
214   uint32_t Mismatched;
215 
216 public:
217   InstrProfStats()
218       : VisitedInMainFile(0), MissingInMainFile(0), Visited(0), Missing(0),
219         Mismatched(0) {}
220   /// Record that we've visited a function and whether or not that function was
221   /// in the main source file.
222   void addVisited(bool MainFile) {
223     if (MainFile)
224       ++VisitedInMainFile;
225     ++Visited;
226   }
227   /// Record that a function we've visited has no profile data.
228   void addMissing(bool MainFile) {
229     if (MainFile)
230       ++MissingInMainFile;
231     ++Missing;
232   }
233   /// Record that a function we've visited has mismatched profile data.
234   void addMismatched(bool MainFile) { ++Mismatched; }
235   /// Whether or not the stats we've gathered indicate any potential problems.
236   bool hasDiagnostics() { return Missing || Mismatched; }
237   /// Report potential problems we've found to \c Diags.
238   void reportDiagnostics(DiagnosticsEngine &Diags, StringRef MainFile);
239 };
240 
241 /// A pair of helper functions for a __block variable.
242 class BlockByrefHelpers : public llvm::FoldingSetNode {
243   // MSVC requires this type to be complete in order to process this
244   // header.
245 public:
246   llvm::Constant *CopyHelper;
247   llvm::Constant *DisposeHelper;
248 
249   /// The alignment of the field.  This is important because
250   /// different offsets to the field within the byref struct need to
251   /// have different helper functions.
252   CharUnits Alignment;
253 
254   BlockByrefHelpers(CharUnits alignment)
255       : CopyHelper(nullptr), DisposeHelper(nullptr), Alignment(alignment) {}
256   BlockByrefHelpers(const BlockByrefHelpers &) = default;
257   virtual ~BlockByrefHelpers();
258 
259   void Profile(llvm::FoldingSetNodeID &id) const {
260     id.AddInteger(Alignment.getQuantity());
261     profileImpl(id);
262   }
263   virtual void profileImpl(llvm::FoldingSetNodeID &id) const = 0;
264 
265   virtual bool needsCopy() const { return true; }
266   virtual void emitCopy(CodeGenFunction &CGF, Address dest, Address src) = 0;
267 
268   virtual bool needsDispose() const { return true; }
269   virtual void emitDispose(CodeGenFunction &CGF, Address field) = 0;
270 };
271 
272 /// This class organizes the cross-function state that is used while generating
273 /// LLVM code.
274 class CodeGenModule : public CodeGenTypeCache {
275   CodeGenModule(const CodeGenModule &) = delete;
276   void operator=(const CodeGenModule &) = delete;
277 
278 public:
279   struct Structor {
280     Structor() : Priority(0), Initializer(nullptr), AssociatedData(nullptr) {}
281     Structor(int Priority, llvm::Constant *Initializer,
282              llvm::Constant *AssociatedData)
283         : Priority(Priority), Initializer(Initializer),
284           AssociatedData(AssociatedData) {}
285     int Priority;
286     llvm::Constant *Initializer;
287     llvm::Constant *AssociatedData;
288   };
289 
290   typedef std::vector<Structor> CtorList;
291 
292 private:
293   ASTContext &Context;
294   const LangOptions &LangOpts;
295   const HeaderSearchOptions &HeaderSearchOpts; // Only used for debug info.
296   const PreprocessorOptions &PreprocessorOpts; // Only used for debug info.
297   const CodeGenOptions &CodeGenOpts;
298   unsigned NumAutoVarInit = 0;
299   llvm::Module &TheModule;
300   DiagnosticsEngine &Diags;
301   const TargetInfo &Target;
302   std::unique_ptr<CGCXXABI> ABI;
303   llvm::LLVMContext &VMContext;
304   std::string ModuleNameHash;
305 
306   std::unique_ptr<CodeGenTBAA> TBAA;
307 
308   mutable std::unique_ptr<TargetCodeGenInfo> TheTargetCodeGenInfo;
309 
310   // This should not be moved earlier, since its initialization depends on some
311   // of the previous reference members being already initialized and also checks
312   // if TheTargetCodeGenInfo is NULL
313   CodeGenTypes Types;
314 
315   /// Holds information about C++ vtables.
316   CodeGenVTables VTables;
317 
318   std::unique_ptr<CGObjCRuntime> ObjCRuntime;
319   std::unique_ptr<CGOpenCLRuntime> OpenCLRuntime;
320   std::unique_ptr<CGOpenMPRuntime> OpenMPRuntime;
321   std::unique_ptr<CGCUDARuntime> CUDARuntime;
322   std::unique_ptr<CGDebugInfo> DebugInfo;
323   std::unique_ptr<ObjCEntrypoints> ObjCData;
324   llvm::MDNode *NoObjCARCExceptionsMetadata = nullptr;
325   std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader;
326   InstrProfStats PGOStats;
327   std::unique_ptr<llvm::SanitizerStatReport> SanStats;
328 
329   // A set of references that have only been seen via a weakref so far. This is
330   // used to remove the weak of the reference if we ever see a direct reference
331   // or a definition.
332   llvm::SmallPtrSet<llvm::GlobalValue*, 10> WeakRefReferences;
333 
334   /// This contains all the decls which have definitions but/ which are deferred
335   /// for emission and therefore should only be output if they are actually
336   /// used. If a decl is in this, then it is known to have not been referenced
337   /// yet.
338   llvm::DenseMap<StringRef, GlobalDecl> DeferredDecls;
339 
340   /// This is a list of deferred decls which we have seen that *are* actually
341   /// referenced. These get code generated when the module is done.
342   std::vector<GlobalDecl> DeferredDeclsToEmit;
343   void addDeferredDeclToEmit(GlobalDecl GD) {
344     DeferredDeclsToEmit.emplace_back(GD);
345   }
346 
347   /// List of alias we have emitted. Used to make sure that what they point to
348   /// is defined once we get to the end of the of the translation unit.
349   std::vector<GlobalDecl> Aliases;
350 
351   /// List of multiversion functions that have to be emitted.  Used to make sure
352   /// we properly emit the iFunc.
353   std::vector<GlobalDecl> MultiVersionFuncs;
354 
355   typedef llvm::StringMap<llvm::TrackingVH<llvm::Constant> > ReplacementsTy;
356   ReplacementsTy Replacements;
357 
358   /// List of global values to be replaced with something else. Used when we
359   /// want to replace a GlobalValue but can't identify it by its mangled name
360   /// anymore (because the name is already taken).
361   llvm::SmallVector<std::pair<llvm::GlobalValue *, llvm::Constant *>, 8>
362     GlobalValReplacements;
363 
364   /// Variables for which we've emitted globals containing their constant
365   /// values along with the corresponding globals, for opportunistic reuse.
366   llvm::DenseMap<const VarDecl*, llvm::GlobalVariable*> InitializerConstants;
367 
368   /// Set of global decls for which we already diagnosed mangled name conflict.
369   /// Required to not issue a warning (on a mangling conflict) multiple times
370   /// for the same decl.
371   llvm::DenseSet<GlobalDecl> DiagnosedConflictingDefinitions;
372 
373   /// A queue of (optional) vtables to consider emitting.
374   std::vector<const CXXRecordDecl*> DeferredVTables;
375 
376   /// A queue of (optional) vtables that may be emitted opportunistically.
377   std::vector<const CXXRecordDecl *> OpportunisticVTables;
378 
379   /// List of global values which are required to be present in the object file;
380   /// bitcast to i8*. This is used for forcing visibility of symbols which may
381   /// otherwise be optimized out.
382   std::vector<llvm::WeakTrackingVH> LLVMUsed;
383   std::vector<llvm::WeakTrackingVH> LLVMCompilerUsed;
384 
385   /// Store the list of global constructors and their respective priorities to
386   /// be emitted when the translation unit is complete.
387   CtorList GlobalCtors;
388 
389   /// Store the list of global destructors and their respective priorities to be
390   /// emitted when the translation unit is complete.
391   CtorList GlobalDtors;
392 
393   /// An ordered map of canonical GlobalDecls to their mangled names.
394   llvm::MapVector<GlobalDecl, StringRef> MangledDeclNames;
395   llvm::StringMap<GlobalDecl, llvm::BumpPtrAllocator> Manglings;
396 
397   /// Global annotations.
398   std::vector<llvm::Constant*> Annotations;
399 
400   /// Map used to get unique annotation strings.
401   llvm::StringMap<llvm::Constant*> AnnotationStrings;
402 
403   /// Used for uniquing of annotation arguments.
404   llvm::DenseMap<unsigned, llvm::Constant *> AnnotationArgs;
405 
406   llvm::StringMap<llvm::GlobalVariable *> CFConstantStringMap;
407 
408   llvm::DenseMap<llvm::Constant *, llvm::GlobalVariable *> ConstantStringMap;
409   llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap;
410   llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap;
411   llvm::DenseMap<const Expr*, llvm::Constant *> MaterializedGlobalTemporaryMap;
412 
413   llvm::DenseMap<QualType, llvm::Constant *> AtomicSetterHelperFnMap;
414   llvm::DenseMap<QualType, llvm::Constant *> AtomicGetterHelperFnMap;
415 
416   /// Map used to get unique type descriptor constants for sanitizers.
417   llvm::DenseMap<QualType, llvm::Constant *> TypeDescriptorMap;
418 
419   /// Map used to track internal linkage functions declared within
420   /// extern "C" regions.
421   typedef llvm::MapVector<IdentifierInfo *,
422                           llvm::GlobalValue *> StaticExternCMap;
423   StaticExternCMap StaticExternCValues;
424 
425   /// thread_local variables defined or used in this TU.
426   std::vector<const VarDecl *> CXXThreadLocals;
427 
428   /// thread_local variables with initializers that need to run
429   /// before any thread_local variable in this TU is odr-used.
430   std::vector<llvm::Function *> CXXThreadLocalInits;
431   std::vector<const VarDecl *> CXXThreadLocalInitVars;
432 
433   /// Global variables with initializers that need to run before main.
434   std::vector<llvm::Function *> CXXGlobalInits;
435 
436   /// When a C++ decl with an initializer is deferred, null is
437   /// appended to CXXGlobalInits, and the index of that null is placed
438   /// here so that the initializer will be performed in the correct
439   /// order. Once the decl is emitted, the index is replaced with ~0U to ensure
440   /// that we don't re-emit the initializer.
441   llvm::DenseMap<const Decl*, unsigned> DelayedCXXInitPosition;
442 
443   typedef std::pair<OrderGlobalInitsOrStermFinalizers, llvm::Function *>
444       GlobalInitData;
445 
446   struct GlobalInitPriorityCmp {
447     bool operator()(const GlobalInitData &LHS,
448                     const GlobalInitData &RHS) const {
449       return LHS.first.priority < RHS.first.priority;
450     }
451   };
452 
453   /// Global variables with initializers whose order of initialization is set by
454   /// init_priority attribute.
455   SmallVector<GlobalInitData, 8> PrioritizedCXXGlobalInits;
456 
457   /// Global destructor functions and arguments that need to run on termination.
458   /// When UseSinitAndSterm is set, it instead contains sterm finalizer
459   /// functions, which also run on unloading a shared library.
460   typedef std::tuple<llvm::FunctionType *, llvm::WeakTrackingVH,
461                      llvm::Constant *>
462       CXXGlobalDtorsOrStermFinalizer_t;
463   SmallVector<CXXGlobalDtorsOrStermFinalizer_t, 8>
464       CXXGlobalDtorsOrStermFinalizers;
465 
466   typedef std::pair<OrderGlobalInitsOrStermFinalizers, llvm::Function *>
467       StermFinalizerData;
468 
469   struct StermFinalizerPriorityCmp {
470     bool operator()(const StermFinalizerData &LHS,
471                     const StermFinalizerData &RHS) const {
472       return LHS.first.priority < RHS.first.priority;
473     }
474   };
475 
476   /// Global variables with sterm finalizers whose order of initialization is
477   /// set by init_priority attribute.
478   SmallVector<StermFinalizerData, 8> PrioritizedCXXStermFinalizers;
479 
480   /// The complete set of modules that has been imported.
481   llvm::SetVector<clang::Module *> ImportedModules;
482 
483   /// The set of modules for which the module initializers
484   /// have been emitted.
485   llvm::SmallPtrSet<clang::Module *, 16> EmittedModuleInitializers;
486 
487   /// A vector of metadata strings for linker options.
488   SmallVector<llvm::MDNode *, 16> LinkerOptionsMetadata;
489 
490   /// A vector of metadata strings for dependent libraries for ELF.
491   SmallVector<llvm::MDNode *, 16> ELFDependentLibraries;
492 
493   /// @name Cache for Objective-C runtime types
494   /// @{
495 
496   /// Cached reference to the class for constant strings. This value has type
497   /// int * but is actually an Obj-C class pointer.
498   llvm::WeakTrackingVH CFConstantStringClassRef;
499 
500   /// The type used to describe the state of a fast enumeration in
501   /// Objective-C's for..in loop.
502   QualType ObjCFastEnumerationStateType;
503 
504   /// @}
505 
506   /// Lazily create the Objective-C runtime
507   void createObjCRuntime();
508 
509   void createOpenCLRuntime();
510   void createOpenMPRuntime();
511   void createCUDARuntime();
512 
513   bool isTriviallyRecursive(const FunctionDecl *F);
514   bool shouldEmitFunction(GlobalDecl GD);
515   bool shouldOpportunisticallyEmitVTables();
516   /// Map used to be sure we don't emit the same CompoundLiteral twice.
517   llvm::DenseMap<const CompoundLiteralExpr *, llvm::GlobalVariable *>
518       EmittedCompoundLiterals;
519 
520   /// Map of the global blocks we've emitted, so that we don't have to re-emit
521   /// them if the constexpr evaluator gets aggressive.
522   llvm::DenseMap<const BlockExpr *, llvm::Constant *> EmittedGlobalBlocks;
523 
524   /// @name Cache for Blocks Runtime Globals
525   /// @{
526 
527   llvm::Constant *NSConcreteGlobalBlock = nullptr;
528   llvm::Constant *NSConcreteStackBlock = nullptr;
529 
530   llvm::FunctionCallee BlockObjectAssign = nullptr;
531   llvm::FunctionCallee BlockObjectDispose = nullptr;
532 
533   llvm::Type *BlockDescriptorType = nullptr;
534   llvm::Type *GenericBlockLiteralType = nullptr;
535 
536   struct {
537     int GlobalUniqueCount;
538   } Block;
539 
540   GlobalDecl initializedGlobalDecl;
541 
542   /// @}
543 
544   /// void @llvm.lifetime.start(i64 %size, i8* nocapture <ptr>)
545   llvm::Function *LifetimeStartFn = nullptr;
546 
547   /// void @llvm.lifetime.end(i64 %size, i8* nocapture <ptr>)
548   llvm::Function *LifetimeEndFn = nullptr;
549 
550   std::unique_ptr<SanitizerMetadata> SanitizerMD;
551 
552   llvm::MapVector<const Decl *, bool> DeferredEmptyCoverageMappingDecls;
553 
554   std::unique_ptr<CoverageMappingModuleGen> CoverageMapping;
555 
556   /// Mapping from canonical types to their metadata identifiers. We need to
557   /// maintain this mapping because identifiers may be formed from distinct
558   /// MDNodes.
559   typedef llvm::DenseMap<QualType, llvm::Metadata *> MetadataTypeMap;
560   MetadataTypeMap MetadataIdMap;
561   MetadataTypeMap VirtualMetadataIdMap;
562   MetadataTypeMap GeneralizedMetadataIdMap;
563 
564 public:
565   CodeGenModule(ASTContext &C, const HeaderSearchOptions &headersearchopts,
566                 const PreprocessorOptions &ppopts,
567                 const CodeGenOptions &CodeGenOpts, llvm::Module &M,
568                 DiagnosticsEngine &Diags,
569                 CoverageSourceInfo *CoverageInfo = nullptr);
570 
571   ~CodeGenModule();
572 
573   void clear();
574 
575   /// Finalize LLVM code generation.
576   void Release();
577 
578   /// Return true if we should emit location information for expressions.
579   bool getExpressionLocationsEnabled() const;
580 
581   /// Return a reference to the configured Objective-C runtime.
582   CGObjCRuntime &getObjCRuntime() {
583     if (!ObjCRuntime) createObjCRuntime();
584     return *ObjCRuntime;
585   }
586 
587   /// Return true iff an Objective-C runtime has been configured.
588   bool hasObjCRuntime() { return !!ObjCRuntime; }
589 
590   const std::string &getModuleNameHash() const { return ModuleNameHash; }
591 
592   /// Return a reference to the configured OpenCL runtime.
593   CGOpenCLRuntime &getOpenCLRuntime() {
594     assert(OpenCLRuntime != nullptr);
595     return *OpenCLRuntime;
596   }
597 
598   /// Return a reference to the configured OpenMP runtime.
599   CGOpenMPRuntime &getOpenMPRuntime() {
600     assert(OpenMPRuntime != nullptr);
601     return *OpenMPRuntime;
602   }
603 
604   /// Return a reference to the configured CUDA runtime.
605   CGCUDARuntime &getCUDARuntime() {
606     assert(CUDARuntime != nullptr);
607     return *CUDARuntime;
608   }
609 
610   ObjCEntrypoints &getObjCEntrypoints() const {
611     assert(ObjCData != nullptr);
612     return *ObjCData;
613   }
614 
615   // Version checking functions, used to implement ObjC's @available:
616   // i32 @__isOSVersionAtLeast(i32, i32, i32)
617   llvm::FunctionCallee IsOSVersionAtLeastFn = nullptr;
618   // i32 @__isPlatformVersionAtLeast(i32, i32, i32, i32)
619   llvm::FunctionCallee IsPlatformVersionAtLeastFn = nullptr;
620 
621   InstrProfStats &getPGOStats() { return PGOStats; }
622   llvm::IndexedInstrProfReader *getPGOReader() const { return PGOReader.get(); }
623 
624   CoverageMappingModuleGen *getCoverageMapping() const {
625     return CoverageMapping.get();
626   }
627 
628   llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) {
629     return StaticLocalDeclMap[D];
630   }
631   void setStaticLocalDeclAddress(const VarDecl *D,
632                                  llvm::Constant *C) {
633     StaticLocalDeclMap[D] = C;
634   }
635 
636   llvm::Constant *
637   getOrCreateStaticVarDecl(const VarDecl &D,
638                            llvm::GlobalValue::LinkageTypes Linkage);
639 
640   llvm::GlobalVariable *getStaticLocalDeclGuardAddress(const VarDecl *D) {
641     return StaticLocalDeclGuardMap[D];
642   }
643   void setStaticLocalDeclGuardAddress(const VarDecl *D,
644                                       llvm::GlobalVariable *C) {
645     StaticLocalDeclGuardMap[D] = C;
646   }
647 
648   Address createUnnamedGlobalFrom(const VarDecl &D, llvm::Constant *Constant,
649                                   CharUnits Align);
650 
651   bool lookupRepresentativeDecl(StringRef MangledName,
652                                 GlobalDecl &Result) const;
653 
654   llvm::Constant *getAtomicSetterHelperFnMap(QualType Ty) {
655     return AtomicSetterHelperFnMap[Ty];
656   }
657   void setAtomicSetterHelperFnMap(QualType Ty,
658                             llvm::Constant *Fn) {
659     AtomicSetterHelperFnMap[Ty] = Fn;
660   }
661 
662   llvm::Constant *getAtomicGetterHelperFnMap(QualType Ty) {
663     return AtomicGetterHelperFnMap[Ty];
664   }
665   void setAtomicGetterHelperFnMap(QualType Ty,
666                             llvm::Constant *Fn) {
667     AtomicGetterHelperFnMap[Ty] = Fn;
668   }
669 
670   llvm::Constant *getTypeDescriptorFromMap(QualType Ty) {
671     return TypeDescriptorMap[Ty];
672   }
673   void setTypeDescriptorInMap(QualType Ty, llvm::Constant *C) {
674     TypeDescriptorMap[Ty] = C;
675   }
676 
677   CGDebugInfo *getModuleDebugInfo() { return DebugInfo.get(); }
678 
679   llvm::MDNode *getNoObjCARCExceptionsMetadata() {
680     if (!NoObjCARCExceptionsMetadata)
681       NoObjCARCExceptionsMetadata = llvm::MDNode::get(getLLVMContext(), None);
682     return NoObjCARCExceptionsMetadata;
683   }
684 
685   ASTContext &getContext() const { return Context; }
686   const LangOptions &getLangOpts() const { return LangOpts; }
687   const HeaderSearchOptions &getHeaderSearchOpts()
688     const { return HeaderSearchOpts; }
689   const PreprocessorOptions &getPreprocessorOpts()
690     const { return PreprocessorOpts; }
691   const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; }
692   llvm::Module &getModule() const { return TheModule; }
693   DiagnosticsEngine &getDiags() const { return Diags; }
694   const llvm::DataLayout &getDataLayout() const {
695     return TheModule.getDataLayout();
696   }
697   const TargetInfo &getTarget() const { return Target; }
698   const llvm::Triple &getTriple() const { return Target.getTriple(); }
699   bool supportsCOMDAT() const;
700   void maybeSetTrivialComdat(const Decl &D, llvm::GlobalObject &GO);
701 
702   CGCXXABI &getCXXABI() const { return *ABI; }
703   llvm::LLVMContext &getLLVMContext() { return VMContext; }
704 
705   bool shouldUseTBAA() const { return TBAA != nullptr; }
706 
707   const TargetCodeGenInfo &getTargetCodeGenInfo();
708 
709   CodeGenTypes &getTypes() { return Types; }
710 
711   CodeGenVTables &getVTables() { return VTables; }
712 
713   ItaniumVTableContext &getItaniumVTableContext() {
714     return VTables.getItaniumVTableContext();
715   }
716 
717   MicrosoftVTableContext &getMicrosoftVTableContext() {
718     return VTables.getMicrosoftVTableContext();
719   }
720 
721   CtorList &getGlobalCtors() { return GlobalCtors; }
722   CtorList &getGlobalDtors() { return GlobalDtors; }
723 
724   /// getTBAATypeInfo - Get metadata used to describe accesses to objects of
725   /// the given type.
726   llvm::MDNode *getTBAATypeInfo(QualType QTy);
727 
728   /// getTBAAAccessInfo - Get TBAA information that describes an access to
729   /// an object of the given type.
730   TBAAAccessInfo getTBAAAccessInfo(QualType AccessType);
731 
732   /// getTBAAVTablePtrAccessInfo - Get the TBAA information that describes an
733   /// access to a virtual table pointer.
734   TBAAAccessInfo getTBAAVTablePtrAccessInfo(llvm::Type *VTablePtrType);
735 
736   llvm::MDNode *getTBAAStructInfo(QualType QTy);
737 
738   /// getTBAABaseTypeInfo - Get metadata that describes the given base access
739   /// type. Return null if the type is not suitable for use in TBAA access tags.
740   llvm::MDNode *getTBAABaseTypeInfo(QualType QTy);
741 
742   /// getTBAAAccessTagInfo - Get TBAA tag for a given memory access.
743   llvm::MDNode *getTBAAAccessTagInfo(TBAAAccessInfo Info);
744 
745   /// mergeTBAAInfoForCast - Get merged TBAA information for the purposes of
746   /// type casts.
747   TBAAAccessInfo mergeTBAAInfoForCast(TBAAAccessInfo SourceInfo,
748                                       TBAAAccessInfo TargetInfo);
749 
750   /// mergeTBAAInfoForConditionalOperator - Get merged TBAA information for the
751   /// purposes of conditional operator.
752   TBAAAccessInfo mergeTBAAInfoForConditionalOperator(TBAAAccessInfo InfoA,
753                                                      TBAAAccessInfo InfoB);
754 
755   /// mergeTBAAInfoForMemoryTransfer - Get merged TBAA information for the
756   /// purposes of memory transfer calls.
757   TBAAAccessInfo mergeTBAAInfoForMemoryTransfer(TBAAAccessInfo DestInfo,
758                                                 TBAAAccessInfo SrcInfo);
759 
760   /// getTBAAInfoForSubobject - Get TBAA information for an access with a given
761   /// base lvalue.
762   TBAAAccessInfo getTBAAInfoForSubobject(LValue Base, QualType AccessType) {
763     if (Base.getTBAAInfo().isMayAlias())
764       return TBAAAccessInfo::getMayAliasInfo();
765     return getTBAAAccessInfo(AccessType);
766   }
767 
768   bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor);
769 
770   bool isPaddedAtomicType(QualType type);
771   bool isPaddedAtomicType(const AtomicType *type);
772 
773   /// DecorateInstructionWithTBAA - Decorate the instruction with a TBAA tag.
774   void DecorateInstructionWithTBAA(llvm::Instruction *Inst,
775                                    TBAAAccessInfo TBAAInfo);
776 
777   /// Adds !invariant.barrier !tag to instruction
778   void DecorateInstructionWithInvariantGroup(llvm::Instruction *I,
779                                              const CXXRecordDecl *RD);
780 
781   /// Emit the given number of characters as a value of type size_t.
782   llvm::ConstantInt *getSize(CharUnits numChars);
783 
784   /// Set the visibility for the given LLVM GlobalValue.
785   void setGlobalVisibility(llvm::GlobalValue *GV, const NamedDecl *D) const;
786 
787   void setDSOLocal(llvm::GlobalValue *GV) const;
788 
789   void setDLLImportDLLExport(llvm::GlobalValue *GV, GlobalDecl D) const;
790   void setDLLImportDLLExport(llvm::GlobalValue *GV, const NamedDecl *D) const;
791   /// Set visibility, dllimport/dllexport and dso_local.
792   /// This must be called after dllimport/dllexport is set.
793   void setGVProperties(llvm::GlobalValue *GV, GlobalDecl GD) const;
794   void setGVProperties(llvm::GlobalValue *GV, const NamedDecl *D) const;
795 
796   void setGVPropertiesAux(llvm::GlobalValue *GV, const NamedDecl *D) const;
797 
798   /// Set the TLS mode for the given LLVM GlobalValue for the thread-local
799   /// variable declaration D.
800   void setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) const;
801 
802   /// Get LLVM TLS mode from CodeGenOptions.
803   llvm::GlobalVariable::ThreadLocalMode GetDefaultLLVMTLSModel() const;
804 
805   static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V) {
806     switch (V) {
807     case DefaultVisibility:   return llvm::GlobalValue::DefaultVisibility;
808     case HiddenVisibility:    return llvm::GlobalValue::HiddenVisibility;
809     case ProtectedVisibility: return llvm::GlobalValue::ProtectedVisibility;
810     }
811     llvm_unreachable("unknown visibility!");
812   }
813 
814   llvm::Constant *GetAddrOfGlobal(GlobalDecl GD,
815                                   ForDefinition_t IsForDefinition
816                                     = NotForDefinition);
817 
818   /// Will return a global variable of the given type. If a variable with a
819   /// different type already exists then a new  variable with the right type
820   /// will be created and all uses of the old variable will be replaced with a
821   /// bitcast to the new variable.
822   llvm::GlobalVariable *
823   CreateOrReplaceCXXRuntimeVariable(StringRef Name, llvm::Type *Ty,
824                                     llvm::GlobalValue::LinkageTypes Linkage,
825                                     unsigned Alignment);
826 
827   llvm::Function *CreateGlobalInitOrCleanUpFunction(
828       llvm::FunctionType *ty, const Twine &name, const CGFunctionInfo &FI,
829       SourceLocation Loc = SourceLocation(), bool TLS = false);
830 
831   /// Return the AST address space of the underlying global variable for D, as
832   /// determined by its declaration. Normally this is the same as the address
833   /// space of D's type, but in CUDA, address spaces are associated with
834   /// declarations, not types. If D is nullptr, return the default address
835   /// space for global variable.
836   ///
837   /// For languages without explicit address spaces, if D has default address
838   /// space, target-specific global or constant address space may be returned.
839   LangAS GetGlobalVarAddressSpace(const VarDecl *D);
840 
841   /// Return the AST address space of constant literal, which is used to emit
842   /// the constant literal as global variable in LLVM IR.
843   /// Note: This is not necessarily the address space of the constant literal
844   /// in AST. For address space agnostic language, e.g. C++, constant literal
845   /// in AST is always in default address space.
846   LangAS GetGlobalConstantAddressSpace() const;
847 
848   /// Return the llvm::Constant for the address of the given global variable.
849   /// If Ty is non-null and if the global doesn't exist, then it will be created
850   /// with the specified type instead of whatever the normal requested type
851   /// would be. If IsForDefinition is true, it is guaranteed that an actual
852   /// global with type Ty will be returned, not conversion of a variable with
853   /// the same mangled name but some other type.
854   llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D,
855                                      llvm::Type *Ty = nullptr,
856                                      ForDefinition_t IsForDefinition
857                                        = NotForDefinition);
858 
859   /// Return the address of the given function. If Ty is non-null, then this
860   /// function will use the specified type if it has to create it.
861   llvm::Constant *GetAddrOfFunction(GlobalDecl GD, llvm::Type *Ty = nullptr,
862                                     bool ForVTable = false,
863                                     bool DontDefer = false,
864                                     ForDefinition_t IsForDefinition
865                                       = NotForDefinition);
866 
867   // Return the function body address of the given function.
868   llvm::Constant *GetFunctionStart(const ValueDecl *Decl);
869 
870   /// Get the address of the RTTI descriptor for the given type.
871   llvm::Constant *GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH = false);
872 
873   /// Get the address of a GUID.
874   ConstantAddress GetAddrOfMSGuidDecl(const MSGuidDecl *GD);
875 
876   /// Get the address of a template parameter object.
877   ConstantAddress
878   GetAddrOfTemplateParamObject(const TemplateParamObjectDecl *TPO);
879 
880   /// Get the address of the thunk for the given global decl.
881   llvm::Constant *GetAddrOfThunk(StringRef Name, llvm::Type *FnTy,
882                                  GlobalDecl GD);
883 
884   /// Get a reference to the target of VD.
885   ConstantAddress GetWeakRefReference(const ValueDecl *VD);
886 
887   /// Returns the assumed alignment of an opaque pointer to the given class.
888   CharUnits getClassPointerAlignment(const CXXRecordDecl *CD);
889 
890   /// Returns the minimum object size for an object of the given class type
891   /// (or a class derived from it).
892   CharUnits getMinimumClassObjectSize(const CXXRecordDecl *CD);
893 
894   /// Returns the minimum object size for an object of the given type.
895   CharUnits getMinimumObjectSize(QualType Ty) {
896     if (CXXRecordDecl *RD = Ty->getAsCXXRecordDecl())
897       return getMinimumClassObjectSize(RD);
898     return getContext().getTypeSizeInChars(Ty);
899   }
900 
901   /// Returns the assumed alignment of a virtual base of a class.
902   CharUnits getVBaseAlignment(CharUnits DerivedAlign,
903                               const CXXRecordDecl *Derived,
904                               const CXXRecordDecl *VBase);
905 
906   /// Given a class pointer with an actual known alignment, and the
907   /// expected alignment of an object at a dynamic offset w.r.t that
908   /// pointer, return the alignment to assume at the offset.
909   CharUnits getDynamicOffsetAlignment(CharUnits ActualAlign,
910                                       const CXXRecordDecl *Class,
911                                       CharUnits ExpectedTargetAlign);
912 
913   CharUnits
914   computeNonVirtualBaseClassOffset(const CXXRecordDecl *DerivedClass,
915                                    CastExpr::path_const_iterator Start,
916                                    CastExpr::path_const_iterator End);
917 
918   /// Returns the offset from a derived class to  a class. Returns null if the
919   /// offset is 0.
920   llvm::Constant *
921   GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl,
922                                CastExpr::path_const_iterator PathBegin,
923                                CastExpr::path_const_iterator PathEnd);
924 
925   llvm::FoldingSet<BlockByrefHelpers> ByrefHelpersCache;
926 
927   /// Fetches the global unique block count.
928   int getUniqueBlockCount() { return ++Block.GlobalUniqueCount; }
929 
930   /// Fetches the type of a generic block descriptor.
931   llvm::Type *getBlockDescriptorType();
932 
933   /// The type of a generic block literal.
934   llvm::Type *getGenericBlockLiteralType();
935 
936   /// Gets the address of a block which requires no captures.
937   llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, StringRef Name);
938 
939   /// Returns the address of a block which requires no caputres, or null if
940   /// we've yet to emit the block for BE.
941   llvm::Constant *getAddrOfGlobalBlockIfEmitted(const BlockExpr *BE) {
942     return EmittedGlobalBlocks.lookup(BE);
943   }
944 
945   /// Notes that BE's global block is available via Addr. Asserts that BE
946   /// isn't already emitted.
947   void setAddrOfGlobalBlock(const BlockExpr *BE, llvm::Constant *Addr);
948 
949   /// Return a pointer to a constant CFString object for the given string.
950   ConstantAddress GetAddrOfConstantCFString(const StringLiteral *Literal);
951 
952   /// Return a pointer to a constant NSString object for the given string. Or a
953   /// user defined String object as defined via
954   /// -fconstant-string-class=class_name option.
955   ConstantAddress GetAddrOfConstantString(const StringLiteral *Literal);
956 
957   /// Return a constant array for the given string.
958   llvm::Constant *GetConstantArrayFromStringLiteral(const StringLiteral *E);
959 
960   /// Return a pointer to a constant array for the given string literal.
961   ConstantAddress
962   GetAddrOfConstantStringFromLiteral(const StringLiteral *S,
963                                      StringRef Name = ".str");
964 
965   /// Return a pointer to a constant array for the given ObjCEncodeExpr node.
966   ConstantAddress
967   GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *);
968 
969   /// Returns a pointer to a character array containing the literal and a
970   /// terminating '\0' character. The result has pointer to array type.
971   ///
972   /// \param GlobalName If provided, the name to use for the global (if one is
973   /// created).
974   ConstantAddress
975   GetAddrOfConstantCString(const std::string &Str,
976                            const char *GlobalName = nullptr);
977 
978   /// Returns a pointer to a constant global variable for the given file-scope
979   /// compound literal expression.
980   ConstantAddress GetAddrOfConstantCompoundLiteral(const CompoundLiteralExpr*E);
981 
982   /// If it's been emitted already, returns the GlobalVariable corresponding to
983   /// a compound literal. Otherwise, returns null.
984   llvm::GlobalVariable *
985   getAddrOfConstantCompoundLiteralIfEmitted(const CompoundLiteralExpr *E);
986 
987   /// Notes that CLE's GlobalVariable is GV. Asserts that CLE isn't already
988   /// emitted.
989   void setAddrOfConstantCompoundLiteral(const CompoundLiteralExpr *CLE,
990                                         llvm::GlobalVariable *GV);
991 
992   /// Returns a pointer to a global variable representing a temporary
993   /// with static or thread storage duration.
994   ConstantAddress GetAddrOfGlobalTemporary(const MaterializeTemporaryExpr *E,
995                                            const Expr *Inner);
996 
997   /// Retrieve the record type that describes the state of an
998   /// Objective-C fast enumeration loop (for..in).
999   QualType getObjCFastEnumerationStateType();
1000 
1001   // Produce code for this constructor/destructor. This method doesn't try
1002   // to apply any ABI rules about which other constructors/destructors
1003   // are needed or if they are alias to each other.
1004   llvm::Function *codegenCXXStructor(GlobalDecl GD);
1005 
1006   /// Return the address of the constructor/destructor of the given type.
1007   llvm::Constant *
1008   getAddrOfCXXStructor(GlobalDecl GD, const CGFunctionInfo *FnInfo = nullptr,
1009                        llvm::FunctionType *FnType = nullptr,
1010                        bool DontDefer = false,
1011                        ForDefinition_t IsForDefinition = NotForDefinition) {
1012     return cast<llvm::Constant>(getAddrAndTypeOfCXXStructor(GD, FnInfo, FnType,
1013                                                             DontDefer,
1014                                                             IsForDefinition)
1015                                     .getCallee());
1016   }
1017 
1018   llvm::FunctionCallee getAddrAndTypeOfCXXStructor(
1019       GlobalDecl GD, const CGFunctionInfo *FnInfo = nullptr,
1020       llvm::FunctionType *FnType = nullptr, bool DontDefer = false,
1021       ForDefinition_t IsForDefinition = NotForDefinition);
1022 
1023   /// Given a builtin id for a function like "__builtin_fabsf", return a
1024   /// Function* for "fabsf".
1025   llvm::Constant *getBuiltinLibFunction(const FunctionDecl *FD,
1026                                         unsigned BuiltinID);
1027 
1028   llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys = None);
1029 
1030   /// Emit code for a single top level declaration.
1031   void EmitTopLevelDecl(Decl *D);
1032 
1033   /// Stored a deferred empty coverage mapping for an unused
1034   /// and thus uninstrumented top level declaration.
1035   void AddDeferredUnusedCoverageMapping(Decl *D);
1036 
1037   /// Remove the deferred empty coverage mapping as this
1038   /// declaration is actually instrumented.
1039   void ClearUnusedCoverageMapping(const Decl *D);
1040 
1041   /// Emit all the deferred coverage mappings
1042   /// for the uninstrumented functions.
1043   void EmitDeferredUnusedCoverageMappings();
1044 
1045   /// Emit an alias for "main" if it has no arguments (needed for wasm).
1046   void EmitMainVoidAlias();
1047 
1048   /// Tell the consumer that this variable has been instantiated.
1049   void HandleCXXStaticMemberVarInstantiation(VarDecl *VD);
1050 
1051   /// If the declaration has internal linkage but is inside an
1052   /// extern "C" linkage specification, prepare to emit an alias for it
1053   /// to the expected name.
1054   template<typename SomeDecl>
1055   void MaybeHandleStaticInExternC(const SomeDecl *D, llvm::GlobalValue *GV);
1056 
1057   /// Add a global to a list to be added to the llvm.used metadata.
1058   void addUsedGlobal(llvm::GlobalValue *GV);
1059 
1060   /// Add a global to a list to be added to the llvm.compiler.used metadata.
1061   void addCompilerUsedGlobal(llvm::GlobalValue *GV);
1062 
1063   /// Add a global to a list to be added to the llvm.compiler.used metadata.
1064   void addUsedOrCompilerUsedGlobal(llvm::GlobalValue *GV);
1065 
1066   /// Add a destructor and object to add to the C++ global destructor function.
1067   void AddCXXDtorEntry(llvm::FunctionCallee DtorFn, llvm::Constant *Object) {
1068     CXXGlobalDtorsOrStermFinalizers.emplace_back(DtorFn.getFunctionType(),
1069                                                  DtorFn.getCallee(), Object);
1070   }
1071 
1072   /// Add an sterm finalizer to the C++ global cleanup function.
1073   void AddCXXStermFinalizerEntry(llvm::FunctionCallee DtorFn) {
1074     CXXGlobalDtorsOrStermFinalizers.emplace_back(DtorFn.getFunctionType(),
1075                                                  DtorFn.getCallee(), nullptr);
1076   }
1077 
1078   /// Add an sterm finalizer to its own llvm.global_dtors entry.
1079   void AddCXXStermFinalizerToGlobalDtor(llvm::Function *StermFinalizer,
1080                                         int Priority) {
1081     AddGlobalDtor(StermFinalizer, Priority);
1082   }
1083 
1084   void AddCXXPrioritizedStermFinalizerEntry(llvm::Function *StermFinalizer,
1085                                             int Priority) {
1086     OrderGlobalInitsOrStermFinalizers Key(Priority,
1087                                           PrioritizedCXXStermFinalizers.size());
1088     PrioritizedCXXStermFinalizers.push_back(
1089         std::make_pair(Key, StermFinalizer));
1090   }
1091 
1092   /// Create or return a runtime function declaration with the specified type
1093   /// and name. If \p AssumeConvergent is true, the call will have the
1094   /// convergent attribute added.
1095   llvm::FunctionCallee
1096   CreateRuntimeFunction(llvm::FunctionType *Ty, StringRef Name,
1097                         llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
1098                         bool Local = false, bool AssumeConvergent = false);
1099 
1100   /// Create a new runtime global variable with the specified type and name.
1101   llvm::Constant *CreateRuntimeVariable(llvm::Type *Ty,
1102                                         StringRef Name);
1103 
1104   ///@name Custom Blocks Runtime Interfaces
1105   ///@{
1106 
1107   llvm::Constant *getNSConcreteGlobalBlock();
1108   llvm::Constant *getNSConcreteStackBlock();
1109   llvm::FunctionCallee getBlockObjectAssign();
1110   llvm::FunctionCallee getBlockObjectDispose();
1111 
1112   ///@}
1113 
1114   llvm::Function *getLLVMLifetimeStartFn();
1115   llvm::Function *getLLVMLifetimeEndFn();
1116 
1117   // Make sure that this type is translated.
1118   void UpdateCompletedType(const TagDecl *TD);
1119 
1120   llvm::Constant *getMemberPointerConstant(const UnaryOperator *e);
1121 
1122   /// Emit type info if type of an expression is a variably modified
1123   /// type. Also emit proper debug info for cast types.
1124   void EmitExplicitCastExprType(const ExplicitCastExpr *E,
1125                                 CodeGenFunction *CGF = nullptr);
1126 
1127   /// Return the result of value-initializing the given type, i.e. a null
1128   /// expression of the given type.  This is usually, but not always, an LLVM
1129   /// null constant.
1130   llvm::Constant *EmitNullConstant(QualType T);
1131 
1132   /// Return a null constant appropriate for zero-initializing a base class with
1133   /// the given type. This is usually, but not always, an LLVM null constant.
1134   llvm::Constant *EmitNullConstantForBase(const CXXRecordDecl *Record);
1135 
1136   /// Emit a general error that something can't be done.
1137   void Error(SourceLocation loc, StringRef error);
1138 
1139   /// Print out an error that codegen doesn't support the specified stmt yet.
1140   void ErrorUnsupported(const Stmt *S, const char *Type);
1141 
1142   /// Print out an error that codegen doesn't support the specified decl yet.
1143   void ErrorUnsupported(const Decl *D, const char *Type);
1144 
1145   /// Set the attributes on the LLVM function for the given decl and function
1146   /// info. This applies attributes necessary for handling the ABI as well as
1147   /// user specified attributes like section.
1148   void SetInternalFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1149                                      const CGFunctionInfo &FI);
1150 
1151   /// Set the LLVM function attributes (sext, zext, etc).
1152   void SetLLVMFunctionAttributes(GlobalDecl GD, const CGFunctionInfo &Info,
1153                                  llvm::Function *F, bool IsThunk);
1154 
1155   /// Set the LLVM function attributes which only apply to a function
1156   /// definition.
1157   void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F);
1158 
1159   /// Set the LLVM function attributes that represent floating point
1160   /// environment.
1161   void setLLVMFunctionFEnvAttributes(const FunctionDecl *D, llvm::Function *F);
1162 
1163   /// Return true iff the given type uses 'sret' when used as a return type.
1164   bool ReturnTypeUsesSRet(const CGFunctionInfo &FI);
1165 
1166   /// Return true iff the given type uses an argument slot when 'sret' is used
1167   /// as a return type.
1168   bool ReturnSlotInterferesWithArgs(const CGFunctionInfo &FI);
1169 
1170   /// Return true iff the given type uses 'fpret' when used as a return type.
1171   bool ReturnTypeUsesFPRet(QualType ResultType);
1172 
1173   /// Return true iff the given type uses 'fp2ret' when used as a return type.
1174   bool ReturnTypeUsesFP2Ret(QualType ResultType);
1175 
1176   /// Get the LLVM attributes and calling convention to use for a particular
1177   /// function type.
1178   ///
1179   /// \param Name - The function name.
1180   /// \param Info - The function type information.
1181   /// \param CalleeInfo - The callee information these attributes are being
1182   /// constructed for. If valid, the attributes applied to this decl may
1183   /// contribute to the function attributes and calling convention.
1184   /// \param Attrs [out] - On return, the attribute list to use.
1185   /// \param CallingConv [out] - On return, the LLVM calling convention to use.
1186   void ConstructAttributeList(StringRef Name, const CGFunctionInfo &Info,
1187                               CGCalleeInfo CalleeInfo,
1188                               llvm::AttributeList &Attrs, unsigned &CallingConv,
1189                               bool AttrOnCallSite, bool IsThunk);
1190 
1191   /// Adds attributes to F according to our CodeGenOptions and LangOptions, as
1192   /// though we had emitted it ourselves.  We remove any attributes on F that
1193   /// conflict with the attributes we add here.
1194   ///
1195   /// This is useful for adding attrs to bitcode modules that you want to link
1196   /// with but don't control, such as CUDA's libdevice.  When linking with such
1197   /// a bitcode library, you might want to set e.g. its functions'
1198   /// "unsafe-fp-math" attribute to match the attr of the functions you're
1199   /// codegen'ing.  Otherwise, LLVM will interpret the bitcode module's lack of
1200   /// unsafe-fp-math attrs as tantamount to unsafe-fp-math=false, and then LLVM
1201   /// will propagate unsafe-fp-math=false up to every transitive caller of a
1202   /// function in the bitcode library!
1203   ///
1204   /// With the exception of fast-math attrs, this will only make the attributes
1205   /// on the function more conservative.  But it's unsafe to call this on a
1206   /// function which relies on particular fast-math attributes for correctness.
1207   /// It's up to you to ensure that this is safe.
1208   void addDefaultFunctionDefinitionAttributes(llvm::Function &F);
1209 
1210   /// Like the overload taking a `Function &`, but intended specifically
1211   /// for frontends that want to build on Clang's target-configuration logic.
1212   void addDefaultFunctionDefinitionAttributes(llvm::AttrBuilder &attrs);
1213 
1214   StringRef getMangledName(GlobalDecl GD);
1215   StringRef getBlockMangledName(GlobalDecl GD, const BlockDecl *BD);
1216 
1217   void EmitTentativeDefinition(const VarDecl *D);
1218 
1219   void EmitExternalDeclaration(const VarDecl *D);
1220 
1221   void EmitVTable(CXXRecordDecl *Class);
1222 
1223   void RefreshTypeCacheForClass(const CXXRecordDecl *Class);
1224 
1225   /// Appends Opts to the "llvm.linker.options" metadata value.
1226   void AppendLinkerOptions(StringRef Opts);
1227 
1228   /// Appends a detect mismatch command to the linker options.
1229   void AddDetectMismatch(StringRef Name, StringRef Value);
1230 
1231   /// Appends a dependent lib to the appropriate metadata value.
1232   void AddDependentLib(StringRef Lib);
1233 
1234 
1235   llvm::GlobalVariable::LinkageTypes getFunctionLinkage(GlobalDecl GD);
1236 
1237   void setFunctionLinkage(GlobalDecl GD, llvm::Function *F) {
1238     F->setLinkage(getFunctionLinkage(GD));
1239   }
1240 
1241   /// Return the appropriate linkage for the vtable, VTT, and type information
1242   /// of the given class.
1243   llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD);
1244 
1245   /// Return the store size, in character units, of the given LLVM type.
1246   CharUnits GetTargetTypeStoreSize(llvm::Type *Ty) const;
1247 
1248   /// Returns LLVM linkage for a declarator.
1249   llvm::GlobalValue::LinkageTypes
1250   getLLVMLinkageForDeclarator(const DeclaratorDecl *D, GVALinkage Linkage,
1251                               bool IsConstantVariable);
1252 
1253   /// Returns LLVM linkage for a declarator.
1254   llvm::GlobalValue::LinkageTypes
1255   getLLVMLinkageVarDefinition(const VarDecl *VD, bool IsConstant);
1256 
1257   /// Emit all the global annotations.
1258   void EmitGlobalAnnotations();
1259 
1260   /// Emit an annotation string.
1261   llvm::Constant *EmitAnnotationString(StringRef Str);
1262 
1263   /// Emit the annotation's translation unit.
1264   llvm::Constant *EmitAnnotationUnit(SourceLocation Loc);
1265 
1266   /// Emit the annotation line number.
1267   llvm::Constant *EmitAnnotationLineNo(SourceLocation L);
1268 
1269   /// Emit additional args of the annotation.
1270   llvm::Constant *EmitAnnotationArgs(const AnnotateAttr *Attr);
1271 
1272   /// Generate the llvm::ConstantStruct which contains the annotation
1273   /// information for a given GlobalValue. The annotation struct is
1274   /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the
1275   /// GlobalValue being annotated. The second field is the constant string
1276   /// created from the AnnotateAttr's annotation. The third field is a constant
1277   /// string containing the name of the translation unit. The fourth field is
1278   /// the line number in the file of the annotated value declaration.
1279   llvm::Constant *EmitAnnotateAttr(llvm::GlobalValue *GV,
1280                                    const AnnotateAttr *AA,
1281                                    SourceLocation L);
1282 
1283   /// Add global annotations that are set on D, for the global GV. Those
1284   /// annotations are emitted during finalization of the LLVM code.
1285   void AddGlobalAnnotations(const ValueDecl *D, llvm::GlobalValue *GV);
1286 
1287   bool isInNoSanitizeList(SanitizerMask Kind, llvm::Function *Fn,
1288                           SourceLocation Loc) const;
1289 
1290   bool isInNoSanitizeList(llvm::GlobalVariable *GV, SourceLocation Loc,
1291                           QualType Ty, StringRef Category = StringRef()) const;
1292 
1293   /// Imbue XRay attributes to a function, applying the always/never attribute
1294   /// lists in the process. Returns true if we did imbue attributes this way,
1295   /// false otherwise.
1296   bool imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc,
1297                       StringRef Category = StringRef()) const;
1298 
1299   /// Returns true if function at the given location should be excluded from
1300   /// profile instrumentation.
1301   bool isProfileInstrExcluded(llvm::Function *Fn, SourceLocation Loc) const;
1302 
1303   SanitizerMetadata *getSanitizerMetadata() {
1304     return SanitizerMD.get();
1305   }
1306 
1307   void addDeferredVTable(const CXXRecordDecl *RD) {
1308     DeferredVTables.push_back(RD);
1309   }
1310 
1311   /// Emit code for a single global function or var decl. Forward declarations
1312   /// are emitted lazily.
1313   void EmitGlobal(GlobalDecl D);
1314 
1315   bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D);
1316 
1317   llvm::GlobalValue *GetGlobalValue(StringRef Ref);
1318 
1319   /// Set attributes which are common to any form of a global definition (alias,
1320   /// Objective-C method, function, global variable).
1321   ///
1322   /// NOTE: This should only be called for definitions.
1323   void SetCommonAttributes(GlobalDecl GD, llvm::GlobalValue *GV);
1324 
1325   void addReplacement(StringRef Name, llvm::Constant *C);
1326 
1327   void addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C);
1328 
1329   /// Emit a code for threadprivate directive.
1330   /// \param D Threadprivate declaration.
1331   void EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D);
1332 
1333   /// Emit a code for declare reduction construct.
1334   void EmitOMPDeclareReduction(const OMPDeclareReductionDecl *D,
1335                                CodeGenFunction *CGF = nullptr);
1336 
1337   /// Emit a code for declare mapper construct.
1338   void EmitOMPDeclareMapper(const OMPDeclareMapperDecl *D,
1339                             CodeGenFunction *CGF = nullptr);
1340 
1341   /// Emit a code for requires directive.
1342   /// \param D Requires declaration
1343   void EmitOMPRequiresDecl(const OMPRequiresDecl *D);
1344 
1345   /// Emit a code for the allocate directive.
1346   /// \param D The allocate declaration
1347   void EmitOMPAllocateDecl(const OMPAllocateDecl *D);
1348 
1349   /// Returns whether the given record has hidden LTO visibility and therefore
1350   /// may participate in (single-module) CFI and whole-program vtable
1351   /// optimization.
1352   bool HasHiddenLTOVisibility(const CXXRecordDecl *RD);
1353 
1354   /// Returns whether the given record has public std LTO visibility
1355   /// and therefore may not participate in (single-module) CFI and whole-program
1356   /// vtable optimization.
1357   bool HasLTOVisibilityPublicStd(const CXXRecordDecl *RD);
1358 
1359   /// Returns the vcall visibility of the given type. This is the scope in which
1360   /// a virtual function call could be made which ends up being dispatched to a
1361   /// member function of this class. This scope can be wider than the visibility
1362   /// of the class itself when the class has a more-visible dynamic base class.
1363   /// The client should pass in an empty Visited set, which is used to prevent
1364   /// redundant recursive processing.
1365   llvm::GlobalObject::VCallVisibility
1366   GetVCallVisibilityLevel(const CXXRecordDecl *RD,
1367                           llvm::DenseSet<const CXXRecordDecl *> &Visited);
1368 
1369   /// Emit type metadata for the given vtable using the given layout.
1370   void EmitVTableTypeMetadata(const CXXRecordDecl *RD,
1371                               llvm::GlobalVariable *VTable,
1372                               const VTableLayout &VTLayout);
1373 
1374   /// Generate a cross-DSO type identifier for MD.
1375   llvm::ConstantInt *CreateCrossDsoCfiTypeId(llvm::Metadata *MD);
1376 
1377   /// Create a metadata identifier for the given type. This may either be an
1378   /// MDString (for external identifiers) or a distinct unnamed MDNode (for
1379   /// internal identifiers).
1380   llvm::Metadata *CreateMetadataIdentifierForType(QualType T);
1381 
1382   /// Create a metadata identifier that is intended to be used to check virtual
1383   /// calls via a member function pointer.
1384   llvm::Metadata *CreateMetadataIdentifierForVirtualMemPtrType(QualType T);
1385 
1386   /// Create a metadata identifier for the generalization of the given type.
1387   /// This may either be an MDString (for external identifiers) or a distinct
1388   /// unnamed MDNode (for internal identifiers).
1389   llvm::Metadata *CreateMetadataIdentifierGeneralized(QualType T);
1390 
1391   /// Create and attach type metadata to the given function.
1392   void CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD,
1393                                           llvm::Function *F);
1394 
1395   /// Whether this function's return type has no side effects, and thus may
1396   /// be trivially discarded if it is unused.
1397   bool MayDropFunctionReturn(const ASTContext &Context, QualType ReturnType);
1398 
1399   /// Returns whether this module needs the "all-vtables" type identifier.
1400   bool NeedAllVtablesTypeId() const;
1401 
1402   /// Create and attach type metadata for the given vtable.
1403   void AddVTableTypeMetadata(llvm::GlobalVariable *VTable, CharUnits Offset,
1404                              const CXXRecordDecl *RD);
1405 
1406   /// Return a vector of most-base classes for RD. This is used to implement
1407   /// control flow integrity checks for member function pointers.
1408   ///
1409   /// A most-base class of a class C is defined as a recursive base class of C,
1410   /// including C itself, that does not have any bases.
1411   std::vector<const CXXRecordDecl *>
1412   getMostBaseClasses(const CXXRecordDecl *RD);
1413 
1414   /// Get the declaration of std::terminate for the platform.
1415   llvm::FunctionCallee getTerminateFn();
1416 
1417   llvm::SanitizerStatReport &getSanStats();
1418 
1419   llvm::Value *
1420   createOpenCLIntToSamplerConversion(const Expr *E, CodeGenFunction &CGF);
1421 
1422   /// OpenCL v1.2 s5.6.4.6 allows the compiler to store kernel argument
1423   /// information in the program executable. The argument information stored
1424   /// includes the argument name, its type, the address and access qualifiers
1425   /// used. This helper can be used to generate metadata for source code kernel
1426   /// function as well as generated implicitly kernels. If a kernel is generated
1427   /// implicitly null value has to be passed to the last two parameters,
1428   /// otherwise all parameters must have valid non-null values.
1429   /// \param FN is a pointer to IR function being generated.
1430   /// \param FD is a pointer to function declaration if any.
1431   /// \param CGF is a pointer to CodeGenFunction that generates this function.
1432   void GenOpenCLArgMetadata(llvm::Function *FN,
1433                             const FunctionDecl *FD = nullptr,
1434                             CodeGenFunction *CGF = nullptr);
1435 
1436   /// Get target specific null pointer.
1437   /// \param T is the LLVM type of the null pointer.
1438   /// \param QT is the clang QualType of the null pointer.
1439   llvm::Constant *getNullPointer(llvm::PointerType *T, QualType QT);
1440 
1441   CharUnits getNaturalTypeAlignment(QualType T,
1442                                     LValueBaseInfo *BaseInfo = nullptr,
1443                                     TBAAAccessInfo *TBAAInfo = nullptr,
1444                                     bool forPointeeType = false);
1445   CharUnits getNaturalPointeeTypeAlignment(QualType T,
1446                                            LValueBaseInfo *BaseInfo = nullptr,
1447                                            TBAAAccessInfo *TBAAInfo = nullptr);
1448   bool stopAutoInit();
1449 
1450   /// Print the postfix for externalized static variable or kernels for single
1451   /// source offloading languages CUDA and HIP.
1452   void printPostfixForExternalizedDecl(llvm::raw_ostream &OS,
1453                                        const Decl *D) const;
1454 
1455 private:
1456   llvm::Constant *GetOrCreateLLVMFunction(
1457       StringRef MangledName, llvm::Type *Ty, GlobalDecl D, bool ForVTable,
1458       bool DontDefer = false, bool IsThunk = false,
1459       llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
1460       ForDefinition_t IsForDefinition = NotForDefinition);
1461 
1462   llvm::Constant *GetOrCreateMultiVersionResolver(GlobalDecl GD,
1463                                                   llvm::Type *DeclTy,
1464                                                   const FunctionDecl *FD);
1465   void UpdateMultiVersionNames(GlobalDecl GD, const FunctionDecl *FD,
1466                                StringRef &CurName);
1467 
1468   llvm::Constant *
1469   GetOrCreateLLVMGlobal(StringRef MangledName, llvm::Type *Ty, LangAS AddrSpace,
1470                         const VarDecl *D,
1471                         ForDefinition_t IsForDefinition = NotForDefinition);
1472 
1473   bool GetCPUAndFeaturesAttributes(GlobalDecl GD,
1474                                    llvm::AttrBuilder &AttrBuilder);
1475   void setNonAliasAttributes(GlobalDecl GD, llvm::GlobalObject *GO);
1476 
1477   /// Set function attributes for a function declaration.
1478   void SetFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1479                              bool IsIncompleteFunction, bool IsThunk);
1480 
1481   void EmitGlobalDefinition(GlobalDecl D, llvm::GlobalValue *GV = nullptr);
1482 
1483   void EmitGlobalFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1484   void EmitMultiVersionFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1485 
1486   void EmitGlobalVarDefinition(const VarDecl *D, bool IsTentative = false);
1487   void EmitExternalVarDeclaration(const VarDecl *D);
1488   void EmitAliasDefinition(GlobalDecl GD);
1489   void emitIFuncDefinition(GlobalDecl GD);
1490   void emitCPUDispatchDefinition(GlobalDecl GD);
1491   void EmitTargetClonesResolver(GlobalDecl GD);
1492   void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
1493   void EmitObjCIvarInitializations(ObjCImplementationDecl *D);
1494 
1495   // C++ related functions.
1496 
1497   void EmitDeclContext(const DeclContext *DC);
1498   void EmitLinkageSpec(const LinkageSpecDecl *D);
1499 
1500   /// Emit the function that initializes C++ thread_local variables.
1501   void EmitCXXThreadLocalInitFunc();
1502 
1503   /// Emit the function that initializes C++ globals.
1504   void EmitCXXGlobalInitFunc();
1505 
1506   /// Emit the function that performs cleanup associated with C++ globals.
1507   void EmitCXXGlobalCleanUpFunc();
1508 
1509   /// Emit the function that initializes the specified global (if PerformInit is
1510   /// true) and registers its destructor.
1511   void EmitCXXGlobalVarDeclInitFunc(const VarDecl *D,
1512                                     llvm::GlobalVariable *Addr,
1513                                     bool PerformInit);
1514 
1515   void EmitPointerToInitFunc(const VarDecl *VD, llvm::GlobalVariable *Addr,
1516                              llvm::Function *InitFunc, InitSegAttr *ISA);
1517 
1518   // FIXME: Hardcoding priority here is gross.
1519   void AddGlobalCtor(llvm::Function *Ctor, int Priority = 65535,
1520                      llvm::Constant *AssociatedData = nullptr);
1521   void AddGlobalDtor(llvm::Function *Dtor, int Priority = 65535,
1522                      bool IsDtorAttrFunc = false);
1523 
1524   /// EmitCtorList - Generates a global array of functions and priorities using
1525   /// the given list and name. This array will have appending linkage and is
1526   /// suitable for use as a LLVM constructor or destructor array. Clears Fns.
1527   void EmitCtorList(CtorList &Fns, const char *GlobalName);
1528 
1529   /// Emit any needed decls for which code generation was deferred.
1530   void EmitDeferred();
1531 
1532   /// Try to emit external vtables as available_externally if they have emitted
1533   /// all inlined virtual functions.  It runs after EmitDeferred() and therefore
1534   /// is not allowed to create new references to things that need to be emitted
1535   /// lazily.
1536   void EmitVTablesOpportunistically();
1537 
1538   /// Call replaceAllUsesWith on all pairs in Replacements.
1539   void applyReplacements();
1540 
1541   /// Call replaceAllUsesWith on all pairs in GlobalValReplacements.
1542   void applyGlobalValReplacements();
1543 
1544   void checkAliases();
1545 
1546   std::map<int, llvm::TinyPtrVector<llvm::Function *>> DtorsUsingAtExit;
1547 
1548   /// Register functions annotated with __attribute__((destructor)) using
1549   /// __cxa_atexit, if it is available, or atexit otherwise.
1550   void registerGlobalDtorsWithAtExit();
1551 
1552   // When using sinit and sterm functions, unregister
1553   // __attribute__((destructor)) annotated functions which were previously
1554   // registered by the atexit subroutine using unatexit.
1555   void unregisterGlobalDtorsWithUnAtExit();
1556 
1557   void emitMultiVersionFunctions();
1558 
1559   /// Emit any vtables which we deferred and still have a use for.
1560   void EmitDeferredVTables();
1561 
1562   /// Emit a dummy function that reference a CoreFoundation symbol when
1563   /// @available is used on Darwin.
1564   void emitAtAvailableLinkGuard();
1565 
1566   /// Emit the llvm.used and llvm.compiler.used metadata.
1567   void emitLLVMUsed();
1568 
1569   /// Emit the link options introduced by imported modules.
1570   void EmitModuleLinkOptions();
1571 
1572   /// Emit aliases for internal-linkage declarations inside "C" language
1573   /// linkage specifications, giving them the "expected" name where possible.
1574   void EmitStaticExternCAliases();
1575 
1576   void EmitDeclMetadata();
1577 
1578   /// Emit the Clang version as llvm.ident metadata.
1579   void EmitVersionIdentMetadata();
1580 
1581   /// Emit the Clang commandline as llvm.commandline metadata.
1582   void EmitCommandLineMetadata();
1583 
1584   /// Emit the module flag metadata used to pass options controlling the
1585   /// the backend to LLVM.
1586   void EmitBackendOptionsMetadata(const CodeGenOptions CodeGenOpts);
1587 
1588   /// Emits OpenCL specific Metadata e.g. OpenCL version.
1589   void EmitOpenCLMetadata();
1590 
1591   /// Emit the llvm.gcov metadata used to tell LLVM where to emit the .gcno and
1592   /// .gcda files in a way that persists in .bc files.
1593   void EmitCoverageFile();
1594 
1595   /// Determine whether the definition must be emitted; if this returns \c
1596   /// false, the definition can be emitted lazily if it's used.
1597   bool MustBeEmitted(const ValueDecl *D);
1598 
1599   /// Determine whether the definition can be emitted eagerly, or should be
1600   /// delayed until the end of the translation unit. This is relevant for
1601   /// definitions whose linkage can change, e.g. implicit function instantions
1602   /// which may later be explicitly instantiated.
1603   bool MayBeEmittedEagerly(const ValueDecl *D);
1604 
1605   /// Check whether we can use a "simpler", more core exceptions personality
1606   /// function.
1607   void SimplifyPersonality();
1608 
1609   /// Helper function for ConstructAttributeList and
1610   /// addDefaultFunctionDefinitionAttributes.  Builds a set of function
1611   /// attributes to add to a function with the given properties.
1612   void getDefaultFunctionAttributes(StringRef Name, bool HasOptnone,
1613                                     bool AttrOnCallSite,
1614                                     llvm::AttrBuilder &FuncAttrs);
1615 
1616   llvm::Metadata *CreateMetadataIdentifierImpl(QualType T, MetadataTypeMap &Map,
1617                                                StringRef Suffix);
1618 };
1619 
1620 }  // end namespace CodeGen
1621 }  // end namespace clang
1622 
1623 #endif // LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H
1624