clang  8.0.0
CodeGenModule.h
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1 //===--- CodeGenModule.h - Per-Module state for LLVM CodeGen ----*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This is the internal per-translation-unit state used for llvm translation.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H
15 #define LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H
16 
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"
29 #include "clang/Basic/Module.h"
31 #include "clang/Basic/XRayLists.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 ObjCMethodDecl;
58 class ObjCImplementationDecl;
59 class ObjCCategoryImplDecl;
60 class ObjCProtocolDecl;
61 class ObjCEncodeExpr;
62 class BlockExpr;
63 class CharUnits;
64 class Decl;
65 class Expr;
66 class Stmt;
67 class InitListExpr;
68 class StringLiteral;
69 class NamedDecl;
70 class ValueDecl;
71 class VarDecl;
72 class LangOptions;
73 class CodeGenOptions;
74 class HeaderSearchOptions;
75 class PreprocessorOptions;
76 class DiagnosticsEngine;
77 class AnnotateAttr;
78 class CXXDestructorDecl;
79 class Module;
80 class CoverageSourceInfo;
81 
82 namespace CodeGen {
83 
84 class CallArgList;
85 class CodeGenFunction;
86 class CodeGenTBAA;
87 class CGCXXABI;
88 class CGDebugInfo;
89 class CGObjCRuntime;
90 class CGOpenCLRuntime;
91 class CGOpenMPRuntime;
92 class CGCUDARuntime;
93 class BlockFieldFlags;
94 class FunctionArgList;
95 class CoverageMappingModuleGen;
96 class TargetCodeGenInfo;
97 
98 enum ForDefinition_t : bool {
101 };
102 
104  unsigned int priority;
105  unsigned int lex_order;
106  OrderGlobalInits(unsigned int p, unsigned int l)
107  : priority(p), lex_order(l) {}
108 
109  bool operator==(const OrderGlobalInits &RHS) const {
110  return priority == RHS.priority && lex_order == RHS.lex_order;
111  }
112 
113  bool operator<(const OrderGlobalInits &RHS) const {
114  return std::tie(priority, lex_order) <
115  std::tie(RHS.priority, RHS.lex_order);
116  }
117 };
118 
120  ObjCEntrypoints() { memset(this, 0, sizeof(*this)); }
121 
122  /// void objc_alloc(id);
123  llvm::Constant *objc_alloc;
124 
125  /// void objc_allocWithZone(id);
126  llvm::Constant *objc_allocWithZone;
127 
128  /// void objc_autoreleasePoolPop(void*);
129  llvm::Constant *objc_autoreleasePoolPop;
130 
131  /// void objc_autoreleasePoolPop(void*);
132  /// Note this method is used when we are using exception handling
134 
135  /// void *objc_autoreleasePoolPush(void);
136  llvm::Constant *objc_autoreleasePoolPush;
137 
138  /// id objc_autorelease(id);
139  llvm::Constant *objc_autorelease;
140 
141  /// id objc_autorelease(id);
142  /// Note this is the runtime method not the intrinsic.
144 
145  /// id objc_autoreleaseReturnValue(id);
147 
148  /// void objc_copyWeak(id *dest, id *src);
149  llvm::Constant *objc_copyWeak;
150 
151  /// void objc_destroyWeak(id*);
152  llvm::Constant *objc_destroyWeak;
153 
154  /// id objc_initWeak(id*, id);
155  llvm::Constant *objc_initWeak;
156 
157  /// id objc_loadWeak(id*);
158  llvm::Constant *objc_loadWeak;
159 
160  /// id objc_loadWeakRetained(id*);
161  llvm::Constant *objc_loadWeakRetained;
162 
163  /// void objc_moveWeak(id *dest, id *src);
164  llvm::Constant *objc_moveWeak;
165 
166  /// id objc_retain(id);
167  llvm::Constant *objc_retain;
168 
169  /// id objc_retain(id);
170  /// Note this is the runtime method not the intrinsic.
171  llvm::Constant *objc_retainRuntimeFunction;
172 
173  /// id objc_retainAutorelease(id);
174  llvm::Constant *objc_retainAutorelease;
175 
176  /// id objc_retainAutoreleaseReturnValue(id);
178 
179  /// id objc_retainAutoreleasedReturnValue(id);
181 
182  /// id objc_retainBlock(id);
183  llvm::Constant *objc_retainBlock;
184 
185  /// void objc_release(id);
186  llvm::Constant *objc_release;
187 
188  /// void objc_release(id);
189  /// Note this is the runtime method not the intrinsic.
191 
192  /// void objc_storeStrong(id*, id);
193  llvm::Constant *objc_storeStrong;
194 
195  /// id objc_storeWeak(id*, id);
196  llvm::Constant *objc_storeWeak;
197 
198  /// id objc_unsafeClaimAutoreleasedReturnValue(id);
200 
201  /// A void(void) inline asm to use to mark that the return value of
202  /// a call will be immediately retain.
204 
205  /// void clang.arc.use(...);
206  llvm::Constant *clang_arc_use;
207 };
208 
209 /// This class records statistics on instrumentation based profiling.
211  uint32_t VisitedInMainFile;
212  uint32_t MissingInMainFile;
213  uint32_t Visited;
214  uint32_t Missing;
215  uint32_t Mismatched;
216 
217 public:
219  : VisitedInMainFile(0), MissingInMainFile(0), Visited(0), Missing(0),
220  Mismatched(0) {}
221  /// Record that we've visited a function and whether or not that function was
222  /// in the main source file.
223  void addVisited(bool MainFile) {
224  if (MainFile)
225  ++VisitedInMainFile;
226  ++Visited;
227  }
228  /// Record that a function we've visited has no profile data.
229  void addMissing(bool MainFile) {
230  if (MainFile)
231  ++MissingInMainFile;
232  ++Missing;
233  }
234  /// Record that a function we've visited has mismatched profile data.
235  void addMismatched(bool MainFile) { ++Mismatched; }
236  /// Whether or not the stats we've gathered indicate any potential problems.
237  bool hasDiagnostics() { return Missing || Mismatched; }
238  /// Report potential problems we've found to \c Diags.
239  void reportDiagnostics(DiagnosticsEngine &Diags, StringRef MainFile);
240 };
241 
242 /// A pair of helper functions for a __block variable.
243 class BlockByrefHelpers : public llvm::FoldingSetNode {
244  // MSVC requires this type to be complete in order to process this
245  // header.
246 public:
247  llvm::Constant *CopyHelper;
248  llvm::Constant *DisposeHelper;
249 
250  /// The alignment of the field. This is important because
251  /// different offsets to the field within the byref struct need to
252  /// have different helper functions.
254 
255  BlockByrefHelpers(CharUnits alignment) : 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.
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  llvm::Module &TheModule;
299  DiagnosticsEngine &Diags;
300  const TargetInfo &Target;
301  std::unique_ptr<CGCXXABI> ABI;
302  llvm::LLVMContext &VMContext;
303 
304  std::unique_ptr<CodeGenTBAA> TBAA;
305 
306  mutable std::unique_ptr<TargetCodeGenInfo> TheTargetCodeGenInfo;
307 
308  // This should not be moved earlier, since its initialization depends on some
309  // of the previous reference members being already initialized and also checks
310  // if TheTargetCodeGenInfo is NULL
311  CodeGenTypes Types;
312 
313  /// Holds information about C++ vtables.
314  CodeGenVTables VTables;
315 
316  std::unique_ptr<CGObjCRuntime> ObjCRuntime;
317  std::unique_ptr<CGOpenCLRuntime> OpenCLRuntime;
318  std::unique_ptr<CGOpenMPRuntime> OpenMPRuntime;
319  std::unique_ptr<CGCUDARuntime> CUDARuntime;
320  std::unique_ptr<CGDebugInfo> DebugInfo;
321  std::unique_ptr<ObjCEntrypoints> ObjCData;
322  llvm::MDNode *NoObjCARCExceptionsMetadata = nullptr;
323  std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader;
324  InstrProfStats PGOStats;
325  std::unique_ptr<llvm::SanitizerStatReport> SanStats;
326 
327  // A set of references that have only been seen via a weakref so far. This is
328  // used to remove the weak of the reference if we ever see a direct reference
329  // or a definition.
330  llvm::SmallPtrSet<llvm::GlobalValue*, 10> WeakRefReferences;
331 
332  /// This contains all the decls which have definitions but/ which are deferred
333  /// for emission and therefore should only be output if they are actually
334  /// used. If a decl is in this, then it is known to have not been referenced
335  /// yet.
336  std::map<StringRef, GlobalDecl> DeferredDecls;
337 
338  /// This is a list of deferred decls which we have seen that *are* actually
339  /// referenced. These get code generated when the module is done.
340  std::vector<GlobalDecl> DeferredDeclsToEmit;
341  void addDeferredDeclToEmit(GlobalDecl GD) {
342  DeferredDeclsToEmit.emplace_back(GD);
343  }
344 
345  /// List of alias we have emitted. Used to make sure that what they point to
346  /// is defined once we get to the end of the of the translation unit.
347  std::vector<GlobalDecl> Aliases;
348 
349  /// List of multiversion functions that have to be emitted. Used to make sure
350  /// we properly emit the iFunc.
351  std::vector<GlobalDecl> MultiVersionFuncs;
352 
353  typedef llvm::StringMap<llvm::TrackingVH<llvm::Constant> > ReplacementsTy;
354  ReplacementsTy Replacements;
355 
356  /// List of global values to be replaced with something else. Used when we
357  /// want to replace a GlobalValue but can't identify it by its mangled name
358  /// anymore (because the name is already taken).
360  GlobalValReplacements;
361 
362  /// Set of global decls for which we already diagnosed mangled name conflict.
363  /// Required to not issue a warning (on a mangling conflict) multiple times
364  /// for the same decl.
365  llvm::DenseSet<GlobalDecl> DiagnosedConflictingDefinitions;
366 
367  /// A queue of (optional) vtables to consider emitting.
368  std::vector<const CXXRecordDecl*> DeferredVTables;
369 
370  /// A queue of (optional) vtables that may be emitted opportunistically.
371  std::vector<const CXXRecordDecl *> OpportunisticVTables;
372 
373  /// List of global values which are required to be present in the object file;
374  /// bitcast to i8*. This is used for forcing visibility of symbols which may
375  /// otherwise be optimized out.
376  std::vector<llvm::WeakTrackingVH> LLVMUsed;
377  std::vector<llvm::WeakTrackingVH> LLVMCompilerUsed;
378 
379  /// Store the list of global constructors and their respective priorities to
380  /// be emitted when the translation unit is complete.
381  CtorList GlobalCtors;
382 
383  /// Store the list of global destructors and their respective priorities to be
384  /// emitted when the translation unit is complete.
385  CtorList GlobalDtors;
386 
387  /// An ordered map of canonical GlobalDecls to their mangled names.
388  llvm::MapVector<GlobalDecl, StringRef> MangledDeclNames;
389  llvm::StringMap<GlobalDecl, llvm::BumpPtrAllocator> Manglings;
390 
391  // An ordered map of canonical GlobalDecls paired with the cpu-index for
392  // cpu-specific name manglings.
393  llvm::MapVector<std::pair<GlobalDecl, unsigned>, StringRef>
394  CPUSpecificMangledDeclNames;
395  llvm::StringMap<std::pair<GlobalDecl, unsigned>, llvm::BumpPtrAllocator>
396  CPUSpecificManglings;
397 
398  /// Global annotations.
399  std::vector<llvm::Constant*> Annotations;
400 
401  /// Map used to get unique annotation strings.
402  llvm::StringMap<llvm::Constant*> AnnotationStrings;
403 
404  llvm::StringMap<llvm::GlobalVariable *> CFConstantStringMap;
405 
406  llvm::DenseMap<llvm::Constant *, llvm::GlobalVariable *> ConstantStringMap;
407  llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap;
408  llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap;
409  llvm::DenseMap<const Expr*, llvm::Constant *> MaterializedGlobalTemporaryMap;
410 
411  llvm::DenseMap<QualType, llvm::Constant *> AtomicSetterHelperFnMap;
412  llvm::DenseMap<QualType, llvm::Constant *> AtomicGetterHelperFnMap;
413 
414  /// Map used to get unique type descriptor constants for sanitizers.
415  llvm::DenseMap<QualType, llvm::Constant *> TypeDescriptorMap;
416 
417  /// Map used to track internal linkage functions declared within
418  /// extern "C" regions.
419  typedef llvm::MapVector<IdentifierInfo *,
420  llvm::GlobalValue *> StaticExternCMap;
421  StaticExternCMap StaticExternCValues;
422 
423  /// thread_local variables defined or used in this TU.
424  std::vector<const VarDecl *> CXXThreadLocals;
425 
426  /// thread_local variables with initializers that need to run
427  /// before any thread_local variable in this TU is odr-used.
428  std::vector<llvm::Function *> CXXThreadLocalInits;
429  std::vector<const VarDecl *> CXXThreadLocalInitVars;
430 
431  /// Global variables with initializers that need to run before main.
432  std::vector<llvm::Function *> CXXGlobalInits;
433 
434  /// When a C++ decl with an initializer is deferred, null is
435  /// appended to CXXGlobalInits, and the index of that null is placed
436  /// here so that the initializer will be performed in the correct
437  /// order. Once the decl is emitted, the index is replaced with ~0U to ensure
438  /// that we don't re-emit the initializer.
439  llvm::DenseMap<const Decl*, unsigned> DelayedCXXInitPosition;
440 
441  typedef std::pair<OrderGlobalInits, llvm::Function*> GlobalInitData;
442 
443  struct GlobalInitPriorityCmp {
444  bool operator()(const GlobalInitData &LHS,
445  const GlobalInitData &RHS) const {
446  return LHS.first.priority < RHS.first.priority;
447  }
448  };
449 
450  /// Global variables with initializers whose order of initialization is set by
451  /// init_priority attribute.
452  SmallVector<GlobalInitData, 8> PrioritizedCXXGlobalInits;
453 
454  /// Global destructor functions and arguments that need to run on termination.
455  std::vector<std::pair<llvm::WeakTrackingVH, llvm::Constant *>> CXXGlobalDtors;
456 
457  /// The complete set of modules that has been imported.
458  llvm::SetVector<clang::Module *> ImportedModules;
459 
460  /// The set of modules for which the module initializers
461  /// have been emitted.
462  llvm::SmallPtrSet<clang::Module *, 16> EmittedModuleInitializers;
463 
464  /// A vector of metadata strings.
465  SmallVector<llvm::MDNode *, 16> LinkerOptionsMetadata;
466 
467  /// @name Cache for Objective-C runtime types
468  /// @{
469 
470  /// Cached reference to the class for constant strings. This value has type
471  /// int * but is actually an Obj-C class pointer.
472  llvm::WeakTrackingVH CFConstantStringClassRef;
473 
474  /// The type used to describe the state of a fast enumeration in
475  /// Objective-C's for..in loop.
476  QualType ObjCFastEnumerationStateType;
477 
478  /// @}
479 
480  /// Lazily create the Objective-C runtime
481  void createObjCRuntime();
482 
483  void createOpenCLRuntime();
484  void createOpenMPRuntime();
485  void createCUDARuntime();
486 
487  bool isTriviallyRecursive(const FunctionDecl *F);
488  bool shouldEmitFunction(GlobalDecl GD);
489  bool shouldOpportunisticallyEmitVTables();
490  /// Map used to be sure we don't emit the same CompoundLiteral twice.
491  llvm::DenseMap<const CompoundLiteralExpr *, llvm::GlobalVariable *>
492  EmittedCompoundLiterals;
493 
494  /// Map of the global blocks we've emitted, so that we don't have to re-emit
495  /// them if the constexpr evaluator gets aggressive.
496  llvm::DenseMap<const BlockExpr *, llvm::Constant *> EmittedGlobalBlocks;
497 
498  /// @name Cache for Blocks Runtime Globals
499  /// @{
500 
501  llvm::Constant *NSConcreteGlobalBlock = nullptr;
502  llvm::Constant *NSConcreteStackBlock = nullptr;
503 
504  llvm::Constant *BlockObjectAssign = nullptr;
505  llvm::Constant *BlockObjectDispose = nullptr;
506 
507  llvm::Type *BlockDescriptorType = nullptr;
508  llvm::Type *GenericBlockLiteralType = nullptr;
509 
510  struct {
512  } Block;
513 
514  /// void @llvm.lifetime.start(i64 %size, i8* nocapture <ptr>)
515  llvm::Constant *LifetimeStartFn = nullptr;
516 
517  /// void @llvm.lifetime.end(i64 %size, i8* nocapture <ptr>)
518  llvm::Constant *LifetimeEndFn = nullptr;
519 
520  GlobalDecl initializedGlobalDecl;
521 
522  std::unique_ptr<SanitizerMetadata> SanitizerMD;
523 
524  /// @}
525 
526  llvm::MapVector<const Decl *, bool> DeferredEmptyCoverageMappingDecls;
527 
528  std::unique_ptr<CoverageMappingModuleGen> CoverageMapping;
529 
530  /// Mapping from canonical types to their metadata identifiers. We need to
531  /// maintain this mapping because identifiers may be formed from distinct
532  /// MDNodes.
533  typedef llvm::DenseMap<QualType, llvm::Metadata *> MetadataTypeMap;
534  MetadataTypeMap MetadataIdMap;
535  MetadataTypeMap VirtualMetadataIdMap;
536  MetadataTypeMap GeneralizedMetadataIdMap;
537 
538 public:
539  CodeGenModule(ASTContext &C, const HeaderSearchOptions &headersearchopts,
540  const PreprocessorOptions &ppopts,
541  const CodeGenOptions &CodeGenOpts, llvm::Module &M,
542  DiagnosticsEngine &Diags,
543  CoverageSourceInfo *CoverageInfo = nullptr);
544 
545  ~CodeGenModule();
546 
547  void clear();
548 
549  /// Finalize LLVM code generation.
550  void Release();
551 
552  /// Return true if we should emit location information for expressions.
553  bool getExpressionLocationsEnabled() const;
554 
555  /// Return a reference to the configured Objective-C runtime.
557  if (!ObjCRuntime) createObjCRuntime();
558  return *ObjCRuntime;
559  }
560 
561  /// Return true iff an Objective-C runtime has been configured.
562  bool hasObjCRuntime() { return !!ObjCRuntime; }
563 
564  /// Return a reference to the configured OpenCL runtime.
566  assert(OpenCLRuntime != nullptr);
567  return *OpenCLRuntime;
568  }
569 
570  /// Return a reference to the configured OpenMP runtime.
572  assert(OpenMPRuntime != nullptr);
573  return *OpenMPRuntime;
574  }
575 
576  /// Return a reference to the configured CUDA runtime.
578  assert(CUDARuntime != nullptr);
579  return *CUDARuntime;
580  }
581 
583  assert(ObjCData != nullptr);
584  return *ObjCData;
585  }
586 
587  // Version checking function, used to implement ObjC's @available:
588  // i32 @__isOSVersionAtLeast(i32, i32, i32)
589  llvm::Constant *IsOSVersionAtLeastFn = nullptr;
590 
591  InstrProfStats &getPGOStats() { return PGOStats; }
592  llvm::IndexedInstrProfReader *getPGOReader() const { return PGOReader.get(); }
593 
595  return CoverageMapping.get();
596  }
597 
598  llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) {
599  return StaticLocalDeclMap[D];
600  }
602  llvm::Constant *C) {
603  StaticLocalDeclMap[D] = C;
604  }
605 
606  llvm::Constant *
607  getOrCreateStaticVarDecl(const VarDecl &D,
608  llvm::GlobalValue::LinkageTypes Linkage);
609 
610  llvm::GlobalVariable *getStaticLocalDeclGuardAddress(const VarDecl *D) {
611  return StaticLocalDeclGuardMap[D];
612  }
614  llvm::GlobalVariable *C) {
615  StaticLocalDeclGuardMap[D] = C;
616  }
617 
618  bool lookupRepresentativeDecl(StringRef MangledName,
619  GlobalDecl &Result) const;
620 
621  llvm::Constant *getAtomicSetterHelperFnMap(QualType Ty) {
622  return AtomicSetterHelperFnMap[Ty];
623  }
625  llvm::Constant *Fn) {
626  AtomicSetterHelperFnMap[Ty] = Fn;
627  }
628 
629  llvm::Constant *getAtomicGetterHelperFnMap(QualType Ty) {
630  return AtomicGetterHelperFnMap[Ty];
631  }
633  llvm::Constant *Fn) {
634  AtomicGetterHelperFnMap[Ty] = Fn;
635  }
636 
637  llvm::Constant *getTypeDescriptorFromMap(QualType Ty) {
638  return TypeDescriptorMap[Ty];
639  }
640  void setTypeDescriptorInMap(QualType Ty, llvm::Constant *C) {
641  TypeDescriptorMap[Ty] = C;
642  }
643 
644  CGDebugInfo *getModuleDebugInfo() { return DebugInfo.get(); }
645 
647  if (!NoObjCARCExceptionsMetadata)
648  NoObjCARCExceptionsMetadata = llvm::MDNode::get(getLLVMContext(), None);
649  return NoObjCARCExceptionsMetadata;
650  }
651 
652  ASTContext &getContext() const { return Context; }
653  const LangOptions &getLangOpts() const { return LangOpts; }
655  const { return HeaderSearchOpts; }
657  const { return PreprocessorOpts; }
658  const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; }
659  llvm::Module &getModule() const { return TheModule; }
660  DiagnosticsEngine &getDiags() const { return Diags; }
661  const llvm::DataLayout &getDataLayout() const {
662  return TheModule.getDataLayout();
663  }
664  const TargetInfo &getTarget() const { return Target; }
665  const llvm::Triple &getTriple() const { return Target.getTriple(); }
666  bool supportsCOMDAT() const;
667  void maybeSetTrivialComdat(const Decl &D, llvm::GlobalObject &GO);
668 
669  CGCXXABI &getCXXABI() const { return *ABI; }
670  llvm::LLVMContext &getLLVMContext() { return VMContext; }
671 
672  bool shouldUseTBAA() const { return TBAA != nullptr; }
673 
674  const TargetCodeGenInfo &getTargetCodeGenInfo();
675 
676  CodeGenTypes &getTypes() { return Types; }
677 
678  CodeGenVTables &getVTables() { return VTables; }
679 
681  return VTables.getItaniumVTableContext();
682  }
683 
685  return VTables.getMicrosoftVTableContext();
686  }
687 
688  CtorList &getGlobalCtors() { return GlobalCtors; }
689  CtorList &getGlobalDtors() { return GlobalDtors; }
690 
691  /// getTBAATypeInfo - Get metadata used to describe accesses to objects of
692  /// the given type.
693  llvm::MDNode *getTBAATypeInfo(QualType QTy);
694 
695  /// getTBAAAccessInfo - Get TBAA information that describes an access to
696  /// an object of the given type.
697  TBAAAccessInfo getTBAAAccessInfo(QualType AccessType);
698 
699  /// getTBAAVTablePtrAccessInfo - Get the TBAA information that describes an
700  /// access to a virtual table pointer.
701  TBAAAccessInfo getTBAAVTablePtrAccessInfo(llvm::Type *VTablePtrType);
702 
703  llvm::MDNode *getTBAAStructInfo(QualType QTy);
704 
705  /// getTBAABaseTypeInfo - Get metadata that describes the given base access
706  /// type. Return null if the type is not suitable for use in TBAA access tags.
707  llvm::MDNode *getTBAABaseTypeInfo(QualType QTy);
708 
709  /// getTBAAAccessTagInfo - Get TBAA tag for a given memory access.
710  llvm::MDNode *getTBAAAccessTagInfo(TBAAAccessInfo Info);
711 
712  /// mergeTBAAInfoForCast - Get merged TBAA information for the purposes of
713  /// type casts.
714  TBAAAccessInfo mergeTBAAInfoForCast(TBAAAccessInfo SourceInfo,
716 
717  /// mergeTBAAInfoForConditionalOperator - Get merged TBAA information for the
718  /// purposes of conditional operator.
719  TBAAAccessInfo mergeTBAAInfoForConditionalOperator(TBAAAccessInfo InfoA,
720  TBAAAccessInfo InfoB);
721 
722  /// mergeTBAAInfoForMemoryTransfer - Get merged TBAA information for the
723  /// purposes of memory transfer calls.
724  TBAAAccessInfo mergeTBAAInfoForMemoryTransfer(TBAAAccessInfo DestInfo,
725  TBAAAccessInfo SrcInfo);
726 
727  /// getTBAAInfoForSubobject - Get TBAA information for an access with a given
728  /// base lvalue.
730  if (Base.getTBAAInfo().isMayAlias())
731  return TBAAAccessInfo::getMayAliasInfo();
732  return getTBAAAccessInfo(AccessType);
733  }
734 
735  bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor);
736 
737  bool isPaddedAtomicType(QualType type);
738  bool isPaddedAtomicType(const AtomicType *type);
739 
740  /// DecorateInstructionWithTBAA - Decorate the instruction with a TBAA tag.
741  void DecorateInstructionWithTBAA(llvm::Instruction *Inst,
742  TBAAAccessInfo TBAAInfo);
743 
744  /// Adds !invariant.barrier !tag to instruction
745  void DecorateInstructionWithInvariantGroup(llvm::Instruction *I,
746  const CXXRecordDecl *RD);
747 
748  /// Emit the given number of characters as a value of type size_t.
749  llvm::ConstantInt *getSize(CharUnits numChars);
750 
751  /// Set the visibility for the given LLVM GlobalValue.
752  void setGlobalVisibility(llvm::GlobalValue *GV, const NamedDecl *D) const;
753 
754  void setGlobalVisibilityAndLocal(llvm::GlobalValue *GV,
755  const NamedDecl *D) const;
756 
757  void setDSOLocal(llvm::GlobalValue *GV) const;
758 
759  void setDLLImportDLLExport(llvm::GlobalValue *GV, GlobalDecl D) const;
760  void setDLLImportDLLExport(llvm::GlobalValue *GV, const NamedDecl *D) const;
761  /// Set visibility, dllimport/dllexport and dso_local.
762  /// This must be called after dllimport/dllexport is set.
763  void setGVProperties(llvm::GlobalValue *GV, GlobalDecl GD) const;
764  void setGVProperties(llvm::GlobalValue *GV, const NamedDecl *D) const;
765 
766  /// Set the TLS mode for the given LLVM GlobalValue for the thread-local
767  /// variable declaration D.
768  void setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) const;
769 
770  static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V) {
771  switch (V) {
775  }
776  llvm_unreachable("unknown visibility!");
777  }
778 
779  llvm::Constant *GetAddrOfGlobal(GlobalDecl GD,
780  ForDefinition_t IsForDefinition
781  = NotForDefinition);
782 
783  /// Will return a global variable of the given type. If a variable with a
784  /// different type already exists then a new variable with the right type
785  /// will be created and all uses of the old variable will be replaced with a
786  /// bitcast to the new variable.
787  llvm::GlobalVariable *
788  CreateOrReplaceCXXRuntimeVariable(StringRef Name, llvm::Type *Ty,
789  llvm::GlobalValue::LinkageTypes Linkage,
790  unsigned Alignment);
791 
792  llvm::Function *
793  CreateGlobalInitOrDestructFunction(llvm::FunctionType *ty, const Twine &name,
794  const CGFunctionInfo &FI,
796  bool TLS = false);
797 
798  /// Return the AST address space of the underlying global variable for D, as
799  /// determined by its declaration. Normally this is the same as the address
800  /// space of D's type, but in CUDA, address spaces are associated with
801  /// declarations, not types. If D is nullptr, return the default address
802  /// space for global variable.
803  ///
804  /// For languages without explicit address spaces, if D has default address
805  /// space, target-specific global or constant address space may be returned.
806  LangAS GetGlobalVarAddressSpace(const VarDecl *D);
807 
808  /// Return the llvm::Constant for the address of the given global variable.
809  /// If Ty is non-null and if the global doesn't exist, then it will be created
810  /// with the specified type instead of whatever the normal requested type
811  /// would be. If IsForDefinition is true, it is guaranteed that an actual
812  /// global with type Ty will be returned, not conversion of a variable with
813  /// the same mangled name but some other type.
814  llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D,
815  llvm::Type *Ty = nullptr,
816  ForDefinition_t IsForDefinition
817  = NotForDefinition);
818 
819  /// Return the AST address space of string literal, which is used to emit
820  /// the string literal as global variable in LLVM IR.
821  /// Note: This is not necessarily the address space of the string literal
822  /// in AST. For address space agnostic language, e.g. C++, string literal
823  /// in AST is always in default address space.
824  LangAS getStringLiteralAddressSpace() const;
825 
826  /// Return the address of the given function. If Ty is non-null, then this
827  /// function will use the specified type if it has to create it.
828  llvm::Constant *GetAddrOfFunction(GlobalDecl GD, llvm::Type *Ty = nullptr,
829  bool ForVTable = false,
830  bool DontDefer = false,
831  ForDefinition_t IsForDefinition
832  = NotForDefinition);
833 
834  /// Get the address of the RTTI descriptor for the given type.
835  llvm::Constant *GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH = false);
836 
837  /// Get the address of a uuid descriptor .
838  ConstantAddress GetAddrOfUuidDescriptor(const CXXUuidofExpr* E);
839 
840  /// Get the address of the thunk for the given global decl.
841  llvm::Constant *GetAddrOfThunk(StringRef Name, llvm::Type *FnTy,
842  GlobalDecl GD);
843 
844  /// Get a reference to the target of VD.
845  ConstantAddress GetWeakRefReference(const ValueDecl *VD);
846 
847  /// Returns the assumed alignment of an opaque pointer to the given class.
848  CharUnits getClassPointerAlignment(const CXXRecordDecl *CD);
849 
850  /// Returns the assumed alignment of a virtual base of a class.
851  CharUnits getVBaseAlignment(CharUnits DerivedAlign,
852  const CXXRecordDecl *Derived,
853  const CXXRecordDecl *VBase);
854 
855  /// Given a class pointer with an actual known alignment, and the
856  /// expected alignment of an object at a dynamic offset w.r.t that
857  /// pointer, return the alignment to assume at the offset.
858  CharUnits getDynamicOffsetAlignment(CharUnits ActualAlign,
859  const CXXRecordDecl *Class,
860  CharUnits ExpectedTargetAlign);
861 
862  CharUnits
863  computeNonVirtualBaseClassOffset(const CXXRecordDecl *DerivedClass,
866 
867  /// Returns the offset from a derived class to a class. Returns null if the
868  /// offset is 0.
869  llvm::Constant *
870  GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl,
873 
874  llvm::FoldingSet<BlockByrefHelpers> ByrefHelpersCache;
875 
876  /// Fetches the global unique block count.
877  int getUniqueBlockCount() { return ++Block.GlobalUniqueCount; }
878 
879  /// Fetches the type of a generic block descriptor.
880  llvm::Type *getBlockDescriptorType();
881 
882  /// The type of a generic block literal.
883  llvm::Type *getGenericBlockLiteralType();
884 
885  /// Gets the address of a block which requires no captures.
886  llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, StringRef Name);
887 
888  /// Returns the address of a block which requires no caputres, or null if
889  /// we've yet to emit the block for BE.
890  llvm::Constant *getAddrOfGlobalBlockIfEmitted(const BlockExpr *BE) {
891  return EmittedGlobalBlocks.lookup(BE);
892  }
893 
894  /// Notes that BE's global block is available via Addr. Asserts that BE
895  /// isn't already emitted.
896  void setAddrOfGlobalBlock(const BlockExpr *BE, llvm::Constant *Addr);
897 
898  /// Return a pointer to a constant CFString object for the given string.
899  ConstantAddress GetAddrOfConstantCFString(const StringLiteral *Literal);
900 
901  /// Return a pointer to a constant NSString object for the given string. Or a
902  /// user defined String object as defined via
903  /// -fconstant-string-class=class_name option.
904  ConstantAddress GetAddrOfConstantString(const StringLiteral *Literal);
905 
906  /// Return a constant array for the given string.
907  llvm::Constant *GetConstantArrayFromStringLiteral(const StringLiteral *E);
908 
909  /// Return a pointer to a constant array for the given string literal.
911  GetAddrOfConstantStringFromLiteral(const StringLiteral *S,
912  StringRef Name = ".str");
913 
914  /// Return a pointer to a constant array for the given ObjCEncodeExpr node.
916  GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *);
917 
918  /// Returns a pointer to a character array containing the literal and a
919  /// terminating '\0' character. The result has pointer to array type.
920  ///
921  /// \param GlobalName If provided, the name to use for the global (if one is
922  /// created).
924  GetAddrOfConstantCString(const std::string &Str,
925  const char *GlobalName = nullptr);
926 
927  /// Returns a pointer to a constant global variable for the given file-scope
928  /// compound literal expression.
929  ConstantAddress GetAddrOfConstantCompoundLiteral(const CompoundLiteralExpr*E);
930 
931  /// If it's been emitted already, returns the GlobalVariable corresponding to
932  /// a compound literal. Otherwise, returns null.
933  llvm::GlobalVariable *
934  getAddrOfConstantCompoundLiteralIfEmitted(const CompoundLiteralExpr *E);
935 
936  /// Notes that CLE's GlobalVariable is GV. Asserts that CLE isn't already
937  /// emitted.
938  void setAddrOfConstantCompoundLiteral(const CompoundLiteralExpr *CLE,
939  llvm::GlobalVariable *GV);
940 
941  /// Returns a pointer to a global variable representing a temporary
942  /// with static or thread storage duration.
943  ConstantAddress GetAddrOfGlobalTemporary(const MaterializeTemporaryExpr *E,
944  const Expr *Inner);
945 
946  /// Retrieve the record type that describes the state of an
947  /// Objective-C fast enumeration loop (for..in).
948  QualType getObjCFastEnumerationStateType();
949 
950  // Produce code for this constructor/destructor. This method doesn't try
951  // to apply any ABI rules about which other constructors/destructors
952  // are needed or if they are alias to each other.
953  llvm::Function *codegenCXXStructor(const CXXMethodDecl *MD,
955 
956  /// Return the address of the constructor/destructor of the given type.
957  llvm::Constant *
958  getAddrOfCXXStructor(const CXXMethodDecl *MD, StructorType Type,
959  const CGFunctionInfo *FnInfo = nullptr,
960  llvm::FunctionType *FnType = nullptr,
961  bool DontDefer = false,
962  ForDefinition_t IsForDefinition = NotForDefinition);
963 
964  /// Given a builtin id for a function like "__builtin_fabsf", return a
965  /// Function* for "fabsf".
966  llvm::Constant *getBuiltinLibFunction(const FunctionDecl *FD,
967  unsigned BuiltinID);
968 
969  llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys = None);
970 
971  /// Emit code for a single top level declaration.
972  void EmitTopLevelDecl(Decl *D);
973 
974  /// Stored a deferred empty coverage mapping for an unused
975  /// and thus uninstrumented top level declaration.
976  void AddDeferredUnusedCoverageMapping(Decl *D);
977 
978  /// Remove the deferred empty coverage mapping as this
979  /// declaration is actually instrumented.
980  void ClearUnusedCoverageMapping(const Decl *D);
981 
982  /// Emit all the deferred coverage mappings
983  /// for the uninstrumented functions.
984  void EmitDeferredUnusedCoverageMappings();
985 
986  /// Tell the consumer that this variable has been instantiated.
987  void HandleCXXStaticMemberVarInstantiation(VarDecl *VD);
988 
989  /// If the declaration has internal linkage but is inside an
990  /// extern "C" linkage specification, prepare to emit an alias for it
991  /// to the expected name.
992  template<typename SomeDecl>
993  void MaybeHandleStaticInExternC(const SomeDecl *D, llvm::GlobalValue *GV);
994 
995  /// Add a global to a list to be added to the llvm.used metadata.
996  void addUsedGlobal(llvm::GlobalValue *GV);
997 
998  /// Add a global to a list to be added to the llvm.compiler.used metadata.
999  void addCompilerUsedGlobal(llvm::GlobalValue *GV);
1000 
1001  /// Add a destructor and object to add to the C++ global destructor function.
1002  void AddCXXDtorEntry(llvm::Constant *DtorFn, llvm::Constant *Object) {
1003  CXXGlobalDtors.emplace_back(DtorFn, Object);
1004  }
1005 
1006  /// Create a new runtime function with the specified type and name.
1007  llvm::Constant *
1008  CreateRuntimeFunction(llvm::FunctionType *Ty, StringRef Name,
1009  llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
1010  bool Local = false);
1011 
1012  /// Create a new compiler builtin function with the specified type and name.
1013  llvm::Constant *
1014  CreateBuiltinFunction(llvm::FunctionType *Ty, StringRef Name,
1015  llvm::AttributeList ExtraAttrs = llvm::AttributeList());
1016  /// Create a new runtime global variable with the specified type and name.
1017  llvm::Constant *CreateRuntimeVariable(llvm::Type *Ty,
1018  StringRef Name);
1019 
1020  ///@name Custom Blocks Runtime Interfaces
1021  ///@{
1022 
1023  llvm::Constant *getNSConcreteGlobalBlock();
1024  llvm::Constant *getNSConcreteStackBlock();
1025  llvm::Constant *getBlockObjectAssign();
1026  llvm::Constant *getBlockObjectDispose();
1027 
1028  ///@}
1029 
1030  llvm::Constant *getLLVMLifetimeStartFn();
1031  llvm::Constant *getLLVMLifetimeEndFn();
1032 
1033  // Make sure that this type is translated.
1034  void UpdateCompletedType(const TagDecl *TD);
1035 
1036  llvm::Constant *getMemberPointerConstant(const UnaryOperator *e);
1037 
1038  /// Emit type info if type of an expression is a variably modified
1039  /// type. Also emit proper debug info for cast types.
1040  void EmitExplicitCastExprType(const ExplicitCastExpr *E,
1041  CodeGenFunction *CGF = nullptr);
1042 
1043  /// Return the result of value-initializing the given type, i.e. a null
1044  /// expression of the given type. This is usually, but not always, an LLVM
1045  /// null constant.
1046  llvm::Constant *EmitNullConstant(QualType T);
1047 
1048  /// Return a null constant appropriate for zero-initializing a base class with
1049  /// the given type. This is usually, but not always, an LLVM null constant.
1050  llvm::Constant *EmitNullConstantForBase(const CXXRecordDecl *Record);
1051 
1052  /// Emit a general error that something can't be done.
1053  void Error(SourceLocation loc, StringRef error);
1054 
1055  /// Print out an error that codegen doesn't support the specified stmt yet.
1056  void ErrorUnsupported(const Stmt *S, const char *Type);
1057 
1058  /// Print out an error that codegen doesn't support the specified decl yet.
1059  void ErrorUnsupported(const Decl *D, const char *Type);
1060 
1061  /// Set the attributes on the LLVM function for the given decl and function
1062  /// info. This applies attributes necessary for handling the ABI as well as
1063  /// user specified attributes like section.
1064  void SetInternalFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1065  const CGFunctionInfo &FI);
1066 
1067  /// Set the LLVM function attributes (sext, zext, etc).
1068  void SetLLVMFunctionAttributes(GlobalDecl GD, const CGFunctionInfo &Info,
1069  llvm::Function *F);
1070 
1071  /// Set the LLVM function attributes which only apply to a function
1072  /// definition.
1073  void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F);
1074 
1075  /// Return true iff the given type uses 'sret' when used as a return type.
1076  bool ReturnTypeUsesSRet(const CGFunctionInfo &FI);
1077 
1078  /// Return true iff the given type uses an argument slot when 'sret' is used
1079  /// as a return type.
1080  bool ReturnSlotInterferesWithArgs(const CGFunctionInfo &FI);
1081 
1082  /// Return true iff the given type uses 'fpret' when used as a return type.
1083  bool ReturnTypeUsesFPRet(QualType ResultType);
1084 
1085  /// Return true iff the given type uses 'fp2ret' when used as a return type.
1086  bool ReturnTypeUsesFP2Ret(QualType ResultType);
1087 
1088  /// Get the LLVM attributes and calling convention to use for a particular
1089  /// function type.
1090  ///
1091  /// \param Name - The function name.
1092  /// \param Info - The function type information.
1093  /// \param CalleeInfo - The callee information these attributes are being
1094  /// constructed for. If valid, the attributes applied to this decl may
1095  /// contribute to the function attributes and calling convention.
1096  /// \param Attrs [out] - On return, the attribute list to use.
1097  /// \param CallingConv [out] - On return, the LLVM calling convention to use.
1098  void ConstructAttributeList(StringRef Name, const CGFunctionInfo &Info,
1099  CGCalleeInfo CalleeInfo,
1100  llvm::AttributeList &Attrs, unsigned &CallingConv,
1101  bool AttrOnCallSite);
1102 
1103  /// Adds attributes to F according to our CodeGenOptions and LangOptions, as
1104  /// though we had emitted it ourselves. We remove any attributes on F that
1105  /// conflict with the attributes we add here.
1106  ///
1107  /// This is useful for adding attrs to bitcode modules that you want to link
1108  /// with but don't control, such as CUDA's libdevice. When linking with such
1109  /// a bitcode library, you might want to set e.g. its functions'
1110  /// "unsafe-fp-math" attribute to match the attr of the functions you're
1111  /// codegen'ing. Otherwise, LLVM will interpret the bitcode module's lack of
1112  /// unsafe-fp-math attrs as tantamount to unsafe-fp-math=false, and then LLVM
1113  /// will propagate unsafe-fp-math=false up to every transitive caller of a
1114  /// function in the bitcode library!
1115  ///
1116  /// With the exception of fast-math attrs, this will only make the attributes
1117  /// on the function more conservative. But it's unsafe to call this on a
1118  /// function which relies on particular fast-math attributes for correctness.
1119  /// It's up to you to ensure that this is safe.
1120  void AddDefaultFnAttrs(llvm::Function &F);
1121 
1122  /// Parses the target attributes passed in, and returns only the ones that are
1123  /// valid feature names.
1124  TargetAttr::ParsedTargetAttr filterFunctionTargetAttrs(const TargetAttr *TD);
1125 
1126  // Fills in the supplied string map with the set of target features for the
1127  // passed in function.
1128  void getFunctionFeatureMap(llvm::StringMap<bool> &FeatureMap, GlobalDecl GD);
1129 
1130  StringRef getMangledName(GlobalDecl GD);
1131  StringRef getBlockMangledName(GlobalDecl GD, const BlockDecl *BD);
1132 
1133  void EmitTentativeDefinition(const VarDecl *D);
1134 
1135  void EmitVTable(CXXRecordDecl *Class);
1136 
1137  void RefreshTypeCacheForClass(const CXXRecordDecl *Class);
1138 
1139  /// Appends Opts to the "llvm.linker.options" metadata value.
1140  void AppendLinkerOptions(StringRef Opts);
1141 
1142  /// Appends a detect mismatch command to the linker options.
1143  void AddDetectMismatch(StringRef Name, StringRef Value);
1144 
1145  /// Appends a dependent lib to the "llvm.linker.options" metadata
1146  /// value.
1147  void AddDependentLib(StringRef Lib);
1148 
1149  void AddELFLibDirective(StringRef Lib);
1150 
1151  llvm::GlobalVariable::LinkageTypes getFunctionLinkage(GlobalDecl GD);
1152 
1153  void setFunctionLinkage(GlobalDecl GD, llvm::Function *F) {
1154  F->setLinkage(getFunctionLinkage(GD));
1155  }
1156 
1157  /// Return the appropriate linkage for the vtable, VTT, and type information
1158  /// of the given class.
1159  llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD);
1160 
1161  /// Return the store size, in character units, of the given LLVM type.
1162  CharUnits GetTargetTypeStoreSize(llvm::Type *Ty) const;
1163 
1164  /// Returns LLVM linkage for a declarator.
1165  llvm::GlobalValue::LinkageTypes
1166  getLLVMLinkageForDeclarator(const DeclaratorDecl *D, GVALinkage Linkage,
1167  bool IsConstantVariable);
1168 
1169  /// Returns LLVM linkage for a declarator.
1170  llvm::GlobalValue::LinkageTypes
1171  getLLVMLinkageVarDefinition(const VarDecl *VD, bool IsConstant);
1172 
1173  /// Emit all the global annotations.
1174  void EmitGlobalAnnotations();
1175 
1176  /// Emit an annotation string.
1177  llvm::Constant *EmitAnnotationString(StringRef Str);
1178 
1179  /// Emit the annotation's translation unit.
1180  llvm::Constant *EmitAnnotationUnit(SourceLocation Loc);
1181 
1182  /// Emit the annotation line number.
1183  llvm::Constant *EmitAnnotationLineNo(SourceLocation L);
1184 
1185  /// Generate the llvm::ConstantStruct which contains the annotation
1186  /// information for a given GlobalValue. The annotation struct is
1187  /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the
1188  /// GlobalValue being annotated. The second field is the constant string
1189  /// created from the AnnotateAttr's annotation. The third field is a constant
1190  /// string containing the name of the translation unit. The fourth field is
1191  /// the line number in the file of the annotated value declaration.
1192  llvm::Constant *EmitAnnotateAttr(llvm::GlobalValue *GV,
1193  const AnnotateAttr *AA,
1194  SourceLocation L);
1195 
1196  /// Add global annotations that are set on D, for the global GV. Those
1197  /// annotations are emitted during finalization of the LLVM code.
1198  void AddGlobalAnnotations(const ValueDecl *D, llvm::GlobalValue *GV);
1199 
1200  bool isInSanitizerBlacklist(SanitizerMask Kind, llvm::Function *Fn,
1201  SourceLocation Loc) const;
1202 
1203  bool isInSanitizerBlacklist(llvm::GlobalVariable *GV, SourceLocation Loc,
1204  QualType Ty,
1205  StringRef Category = StringRef()) const;
1206 
1207  /// Imbue XRay attributes to a function, applying the always/never attribute
1208  /// lists in the process. Returns true if we did imbue attributes this way,
1209  /// false otherwise.
1210  bool imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc,
1211  StringRef Category = StringRef()) const;
1212 
1214  return SanitizerMD.get();
1215  }
1216 
1218  DeferredVTables.push_back(RD);
1219  }
1220 
1221  /// Emit code for a single global function or var decl. Forward declarations
1222  /// are emitted lazily.
1223  void EmitGlobal(GlobalDecl D);
1224 
1225  bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D);
1226 
1227  llvm::GlobalValue *GetGlobalValue(StringRef Ref);
1228 
1229  /// Set attributes which are common to any form of a global definition (alias,
1230  /// Objective-C method, function, global variable).
1231  ///
1232  /// NOTE: This should only be called for definitions.
1233  void SetCommonAttributes(GlobalDecl GD, llvm::GlobalValue *GV);
1234 
1235  void addReplacement(StringRef Name, llvm::Constant *C);
1236 
1237  void addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C);
1238 
1239  /// Emit a code for threadprivate directive.
1240  /// \param D Threadprivate declaration.
1241  void EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D);
1242 
1243  /// Emit a code for declare reduction construct.
1244  void EmitOMPDeclareReduction(const OMPDeclareReductionDecl *D,
1245  CodeGenFunction *CGF = nullptr);
1246 
1247  /// Emit a code for requires directive.
1248  /// \param D Requires declaration
1249  void EmitOMPRequiresDecl(const OMPRequiresDecl *D);
1250 
1251  /// Returns whether the given record has hidden LTO visibility and therefore
1252  /// may participate in (single-module) CFI and whole-program vtable
1253  /// optimization.
1254  bool HasHiddenLTOVisibility(const CXXRecordDecl *RD);
1255 
1256  /// Emit type metadata for the given vtable using the given layout.
1257  void EmitVTableTypeMetadata(llvm::GlobalVariable *VTable,
1258  const VTableLayout &VTLayout);
1259 
1260  /// Generate a cross-DSO type identifier for MD.
1261  llvm::ConstantInt *CreateCrossDsoCfiTypeId(llvm::Metadata *MD);
1262 
1263  /// Create a metadata identifier for the given type. This may either be an
1264  /// MDString (for external identifiers) or a distinct unnamed MDNode (for
1265  /// internal identifiers).
1266  llvm::Metadata *CreateMetadataIdentifierForType(QualType T);
1267 
1268  /// Create a metadata identifier that is intended to be used to check virtual
1269  /// calls via a member function pointer.
1270  llvm::Metadata *CreateMetadataIdentifierForVirtualMemPtrType(QualType T);
1271 
1272  /// Create a metadata identifier for the generalization of the given type.
1273  /// This may either be an MDString (for external identifiers) or a distinct
1274  /// unnamed MDNode (for internal identifiers).
1275  llvm::Metadata *CreateMetadataIdentifierGeneralized(QualType T);
1276 
1277  /// Create and attach type metadata to the given function.
1278  void CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD,
1279  llvm::Function *F);
1280 
1281  /// Returns whether this module needs the "all-vtables" type identifier.
1282  bool NeedAllVtablesTypeId() const;
1283 
1284  /// Create and attach type metadata for the given vtable.
1285  void AddVTableTypeMetadata(llvm::GlobalVariable *VTable, CharUnits Offset,
1286  const CXXRecordDecl *RD);
1287 
1288  /// Return a vector of most-base classes for RD. This is used to implement
1289  /// control flow integrity checks for member function pointers.
1290  ///
1291  /// A most-base class of a class C is defined as a recursive base class of C,
1292  /// including C itself, that does not have any bases.
1293  std::vector<const CXXRecordDecl *>
1294  getMostBaseClasses(const CXXRecordDecl *RD);
1295 
1296  /// Get the declaration of std::terminate for the platform.
1297  llvm::Constant *getTerminateFn();
1298 
1299  llvm::SanitizerStatReport &getSanStats();
1300 
1301  llvm::Value *
1302  createOpenCLIntToSamplerConversion(const Expr *E, CodeGenFunction &CGF);
1303 
1304  /// Get target specific null pointer.
1305  /// \param T is the LLVM type of the null pointer.
1306  /// \param QT is the clang QualType of the null pointer.
1307  llvm::Constant *getNullPointer(llvm::PointerType *T, QualType QT);
1308 
1309 private:
1310  llvm::Constant *GetOrCreateLLVMFunction(
1311  StringRef MangledName, llvm::Type *Ty, GlobalDecl D, bool ForVTable,
1312  bool DontDefer = false, bool IsThunk = false,
1313  llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
1314  ForDefinition_t IsForDefinition = NotForDefinition);
1315 
1316  llvm::Constant *GetOrCreateMultiVersionResolver(GlobalDecl GD,
1317  llvm::Type *DeclTy,
1318  const FunctionDecl *FD);
1319  void UpdateMultiVersionNames(GlobalDecl GD, const FunctionDecl *FD);
1320 
1321  llvm::Constant *GetOrCreateLLVMGlobal(StringRef MangledName,
1322  llvm::PointerType *PTy,
1323  const VarDecl *D,
1324  ForDefinition_t IsForDefinition
1325  = NotForDefinition);
1326 
1327  bool GetCPUAndFeaturesAttributes(GlobalDecl GD,
1328  llvm::AttrBuilder &AttrBuilder);
1329  void setNonAliasAttributes(GlobalDecl GD, llvm::GlobalObject *GO);
1330 
1331  /// Set function attributes for a function declaration.
1332  void SetFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1333  bool IsIncompleteFunction, bool IsThunk);
1334 
1335  void EmitGlobalDefinition(GlobalDecl D, llvm::GlobalValue *GV = nullptr);
1336 
1337  void EmitGlobalFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1338  void EmitMultiVersionFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1339 
1340  void EmitGlobalVarDefinition(const VarDecl *D, bool IsTentative = false);
1341  void EmitAliasDefinition(GlobalDecl GD);
1342  void emitIFuncDefinition(GlobalDecl GD);
1343  void emitCPUDispatchDefinition(GlobalDecl GD);
1344  void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
1345  void EmitObjCIvarInitializations(ObjCImplementationDecl *D);
1346 
1347  // C++ related functions.
1348 
1349  void EmitDeclContext(const DeclContext *DC);
1350  void EmitLinkageSpec(const LinkageSpecDecl *D);
1351 
1352  /// Emit the function that initializes C++ thread_local variables.
1353  void EmitCXXThreadLocalInitFunc();
1354 
1355  /// Emit the function that initializes C++ globals.
1356  void EmitCXXGlobalInitFunc();
1357 
1358  /// Emit the function that destroys C++ globals.
1359  void EmitCXXGlobalDtorFunc();
1360 
1361  /// Emit the function that initializes the specified global (if PerformInit is
1362  /// true) and registers its destructor.
1363  void EmitCXXGlobalVarDeclInitFunc(const VarDecl *D,
1364  llvm::GlobalVariable *Addr,
1365  bool PerformInit);
1366 
1367  void EmitPointerToInitFunc(const VarDecl *VD, llvm::GlobalVariable *Addr,
1368  llvm::Function *InitFunc, InitSegAttr *ISA);
1369 
1370  // FIXME: Hardcoding priority here is gross.
1371  void AddGlobalCtor(llvm::Function *Ctor, int Priority = 65535,
1372  llvm::Constant *AssociatedData = nullptr);
1373  void AddGlobalDtor(llvm::Function *Dtor, int Priority = 65535);
1374 
1375  /// EmitCtorList - Generates a global array of functions and priorities using
1376  /// the given list and name. This array will have appending linkage and is
1377  /// suitable for use as a LLVM constructor or destructor array. Clears Fns.
1378  void EmitCtorList(CtorList &Fns, const char *GlobalName);
1379 
1380  /// Emit any needed decls for which code generation was deferred.
1381  void EmitDeferred();
1382 
1383  /// Try to emit external vtables as available_externally if they have emitted
1384  /// all inlined virtual functions. It runs after EmitDeferred() and therefore
1385  /// is not allowed to create new references to things that need to be emitted
1386  /// lazily.
1387  void EmitVTablesOpportunistically();
1388 
1389  /// Call replaceAllUsesWith on all pairs in Replacements.
1390  void applyReplacements();
1391 
1392  /// Call replaceAllUsesWith on all pairs in GlobalValReplacements.
1393  void applyGlobalValReplacements();
1394 
1395  void checkAliases();
1396 
1397  std::map<int, llvm::TinyPtrVector<llvm::Function *>> DtorsUsingAtExit;
1398 
1399  /// Register functions annotated with __attribute__((destructor)) using
1400  /// __cxa_atexit, if it is available, or atexit otherwise.
1401  void registerGlobalDtorsWithAtExit();
1402 
1403  void emitMultiVersionFunctions();
1404 
1405  /// Emit any vtables which we deferred and still have a use for.
1406  void EmitDeferredVTables();
1407 
1408  /// Emit a dummy function that reference a CoreFoundation symbol when
1409  /// @available is used on Darwin.
1410  void emitAtAvailableLinkGuard();
1411 
1412  /// Emit the llvm.used and llvm.compiler.used metadata.
1413  void emitLLVMUsed();
1414 
1415  /// Emit the link options introduced by imported modules.
1416  void EmitModuleLinkOptions();
1417 
1418  /// Emit aliases for internal-linkage declarations inside "C" language
1419  /// linkage specifications, giving them the "expected" name where possible.
1420  void EmitStaticExternCAliases();
1421 
1422  void EmitDeclMetadata();
1423 
1424  /// Emit the Clang version as llvm.ident metadata.
1425  void EmitVersionIdentMetadata();
1426 
1427  /// Emit the Clang commandline as llvm.commandline metadata.
1428  void EmitCommandLineMetadata();
1429 
1430  /// Emits target specific Metadata for global declarations.
1431  void EmitTargetMetadata();
1432 
1433  /// Emits OpenCL specific Metadata e.g. OpenCL version.
1434  void EmitOpenCLMetadata();
1435 
1436  /// Emit the llvm.gcov metadata used to tell LLVM where to emit the .gcno and
1437  /// .gcda files in a way that persists in .bc files.
1438  void EmitCoverageFile();
1439 
1440  /// Emits the initializer for a uuidof string.
1441  llvm::Constant *EmitUuidofInitializer(StringRef uuidstr);
1442 
1443  /// Determine whether the definition must be emitted; if this returns \c
1444  /// false, the definition can be emitted lazily if it's used.
1445  bool MustBeEmitted(const ValueDecl *D);
1446 
1447  /// Determine whether the definition can be emitted eagerly, or should be
1448  /// delayed until the end of the translation unit. This is relevant for
1449  /// definitions whose linkage can change, e.g. implicit function instantions
1450  /// which may later be explicitly instantiated.
1451  bool MayBeEmittedEagerly(const ValueDecl *D);
1452 
1453  /// Check whether we can use a "simpler", more core exceptions personality
1454  /// function.
1455  void SimplifyPersonality();
1456 
1457  /// Helper function for ConstructAttributeList and AddDefaultFnAttrs.
1458  /// Constructs an AttrList for a function with the given properties.
1459  void ConstructDefaultFnAttrList(StringRef Name, bool HasOptnone,
1460  bool AttrOnCallSite,
1461  llvm::AttrBuilder &FuncAttrs);
1462 
1463  llvm::Metadata *CreateMetadataIdentifierImpl(QualType T, MetadataTypeMap &Map,
1464  StringRef Suffix);
1465 };
1466 
1467 } // end namespace CodeGen
1468 } // end namespace clang
1469 
1470 #endif // LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H
const llvm::DataLayout & getDataLayout() const
TBAAAccessInfo getTBAAInfoForSubobject(LValue Base, QualType AccessType)
getTBAAInfoForSubobject - Get TBAA information for an access with a given base lvalue.
CGOpenCLRuntime & getOpenCLRuntime()
Return a reference to the configured OpenCL runtime.
Represents a function declaration or definition.
Definition: Decl.h:1738
bool operator==(const OrderGlobalInits &RHS) const
void setTypeDescriptorInMap(QualType Ty, llvm::Constant *C)
A (possibly-)qualified type.
Definition: Type.h:638
const CodeGenOptions & getCodeGenOpts() const
bool hasObjCRuntime()
Return true iff an Objective-C runtime has been configured.
llvm::LLVMContext & getLLVMContext()
DominatorTree GraphTraits specialization so the DominatorTree can be iterable by generic graph iterat...
Definition: Dominators.h:30
Stmt - This represents one statement.
Definition: Stmt.h:66
const llvm::Triple & getTriple() const
Returns the target triple of the primary target.
Definition: TargetInfo.h:949
Implements runtime-specific code generation functions.
Definition: CGObjCRuntime.h:64
Defines the clang::Module class, which describes a module in the source code.
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
llvm::Constant * objc_autoreleaseReturnValue
id objc_autoreleaseReturnValue(id);
llvm::Constant * objc_autoreleasePoolPopInvoke
void objc_autoreleasePoolPop(void*); Note this method is used when we are using exception handling ...
BlockByrefHelpers(CharUnits alignment)
The base class of the type hierarchy.
Definition: Type.h:1407
void setFunctionLinkage(GlobalDecl GD, llvm::Function *F)
Stores additional source code information like skipped ranges which is required by the coverage mappi...
virtual void clear()
llvm::Constant * objc_loadWeakRetained
id objc_loadWeakRetained(id*);
The l-value was an access to a declared entity or something equivalently strong, like the address of ...
constexpr XRayInstrMask Function
Definition: XRayInstr.h:39
PreprocessorOptions - This class is used for passing the various options used in preprocessor initial...
Represents a prvalue temporary that is written into memory so that a reference can bind to it...
Definition: ExprCXX.h:4156
static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V)
const CXXBaseSpecifier *const * path_const_iterator
Definition: Expr.h:3067
llvm::Constant * objc_allocWithZone
void objc_allocWithZone(id);
Represents a variable declaration or definition.
Definition: Decl.h:813
Objects with "hidden" visibility are not seen by the dynamic linker.
Definition: Visibility.h:37
CompoundLiteralExpr - [C99 6.5.2.5].
Definition: Expr.h:2925
CGDebugInfo * getModuleDebugInfo()
LangAS
Defines the address space values used by the address space qualifier of QualType. ...
Definition: AddressSpaces.h:26
This class gathers all debug information during compilation and is responsible for emitting to llvm g...
Definition: CGDebugInfo.h:54
DiagnosticsEngine & getDiags() const
llvm::Constant * getAtomicSetterHelperFnMap(QualType Ty)
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:24
llvm::Constant * objc_autorelease
id objc_autorelease(id);
llvm::GlobalVariable * getStaticLocalDeclGuardAddress(const VarDecl *D)
llvm::Constant * objc_copyWeak
void objc_copyWeak(id *dest, id *src);
llvm::Constant * getAtomicGetterHelperFnMap(QualType Ty)
One of these records is kept for each identifier that is lexed.
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
llvm::Constant * objc_loadWeak
id objc_loadWeak(id*);
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:155
llvm::Constant * objc_retainAutoreleasedReturnValue
id objc_retainAutoreleasedReturnValue(id);
int Category
Definition: Format.cpp:1632
llvm::IndexedInstrProfReader * getPGOReader() const
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:50
Objects with "default" visibility are seen by the dynamic linker and act like normal objects...
Definition: Visibility.h:46
CGCUDARuntime & getCUDARuntime()
Return a reference to the configured CUDA runtime.
llvm::Constant * objc_initWeak
id objc_initWeak(id*, id);
bool operator<(const OrderGlobalInits &RHS) const
CharUnits - This is an opaque type for sizes expressed in character units.
Definition: CharUnits.h:38
Structor(int Priority, llvm::Constant *Initializer, llvm::Constant *AssociatedData)
Visibility
Describes the different kinds of visibility that a declaration may have.
Definition: Visibility.h:34
void setStaticLocalDeclAddress(const VarDecl *D, llvm::Constant *C)
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:149
llvm::Constant * objc_release
void objc_release(id);
llvm::Constant * getAddrOfGlobalBlockIfEmitted(const BlockExpr *BE)
Returns the address of a block which requires no caputres, or null if we&#39;ve yet to emit the block for...
void addDeferredVTable(const CXXRecordDecl *RD)
void setAtomicGetterHelperFnMap(QualType Ty, llvm::Constant *Fn)
void addMissing(bool MainFile)
Record that a function we&#39;ve visited has no profile data.
Enums/classes describing ABI related information about constructors, destructors and thunks...
ItaniumVTableContext & getItaniumVTableContext()
Definition: CGVTables.h:79
__DEVICE__ void * memset(void *__a, int __b, size_t __c)
const PreprocessorOptions & getPreprocessorOpts() const
void Profile(llvm::FoldingSetNodeID &id) const
Represents a linkage specification.
Definition: DeclCXX.h:2826
InstrProfStats & getPGOStats()
llvm::Constant * getStaticLocalDeclAddress(const VarDecl *D)
llvm::Constant * objc_storeStrong
void objc_storeStrong(id*, id);
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:689
QuantityType getQuantity() const
getQuantity - Get the raw integer representation of this quantity.
Definition: CharUnits.h:179
This represents &#39;#pragma omp requires...&#39; directive.
Definition: DeclOpenMP.h:250
unsigned Offset
Definition: Format.cpp:1631
Exposes information about the current target.
Definition: TargetInfo.h:54
CGObjCRuntime & getObjCRuntime()
Return a reference to the configured Objective-C runtime.
CharUnits Alignment
The alignment of the field.
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3858
Represent the declaration of a variable (in which case it is an lvalue) a function (in which case it ...
Definition: Decl.h:637
This represents one expression.
Definition: Expr.h:106
Defines the clang::LangOptions interface.
llvm::Constant * objc_autoreleasePoolPop
void objc_autoreleasePoolPop(void*);
SourceLocation End
Organizes the cross-function state that is used while generating code coverage mapping data...
BlockExpr - Adaptor class for mixing a BlockDecl with expressions.
Definition: Expr.h:5177
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2706
void AddCXXDtorEntry(llvm::Constant *DtorFn, llvm::Constant *Object)
Add a destructor and object to add to the C++ global destructor function.
llvm::Constant * objc_retain
id objc_retain(id);
llvm::Constant * objc_releaseRuntimeFunction
void objc_release(id); Note this is the runtime method not the intrinsic.
void setStaticLocalDeclGuardAddress(const VarDecl *D, llvm::GlobalVariable *C)
MicrosoftVTableContext & getMicrosoftVTableContext()
Objects with "protected" visibility are seen by the dynamic linker but always dynamically resolve to ...
Definition: Visibility.h:42
void addMismatched(bool MainFile)
Record that a function we&#39;ve visited has mismatched profile data.
TBAAAccessInfo getTBAAInfo() const
Definition: CGValue.h:308
UnaryOperator - This represents the unary-expression&#39;s (except sizeof and alignof), the postinc/postdec operators from postfix-expression, and various extensions.
Definition: Expr.h:1896
const TargetInfo & getTarget() const
const LangOptions & getLangOpts() const
ASTContext & getContext() const
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:236
GlobalDecl - represents a global declaration.
Definition: GlobalDecl.h:35
virtual bool needsCopy() const
void addVisited(bool MainFile)
Record that we&#39;ve visited a function and whether or not that function was in the main source file...
llvm::Constant * objc_retainBlock
id objc_retainBlock(id);
Kind
llvm::Constant * objc_storeWeak
id objc_storeWeak(id*, id);
Encodes a location in the source.
llvm::Constant * getTypeDescriptorFromMap(QualType Ty)
This represents &#39;#pragma omp declare reduction ...&#39; directive.
Definition: DeclOpenMP.h:103
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3064
llvm::Constant * objc_autoreleasePoolPush
void *objc_autoreleasePoolPush(void);
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2041
ObjCEntrypoints & getObjCEntrypoints() const
This file defines OpenMP nodes for declarative directives.
llvm::InlineAsm * retainAutoreleasedReturnValueMarker
A void(void) inline asm to use to mark that the return value of a call will be immediately retain...
const HeaderSearchOptions & getHeaderSearchOpts() const
An aligned address.
Definition: Address.h:25
virtual bool needsDispose() const
llvm::Constant * objc_alloc
void objc_alloc(id);
ItaniumVTableContext & getItaniumVTableContext()
TargetCodeGenInfo - This class organizes various target-specific codegeneration issues, like target-specific attributes, builtins and so on.
Definition: TargetInfo.h:46
std::vector< Structor > CtorList
CGFunctionInfo - Class to encapsulate the information about a function definition.
This class organizes the cross-function state that is used while generating LLVM code.
llvm::Constant * objc_unsafeClaimAutoreleasedReturnValue
id objc_unsafeClaimAutoreleasedReturnValue(id);
CGOpenMPRuntime & getOpenMPRuntime()
Return a reference to the configured OpenMP runtime.
Dataflow Directional Tag Classes.
llvm::FoldingSet< BlockByrefHelpers > ByrefHelpersCache
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1262
int getUniqueBlockCount()
Fetches the global unique block count.
The basic abstraction for the target Objective-C runtime.
Definition: ObjCRuntime.h:28
static llvm::Constant * EmitNullConstantForBase(CodeGenModule &CGM, llvm::Type *baseType, const CXXRecordDecl *base)
Emit the null constant for a base subobject.
llvm::Constant * objc_destroyWeak
void objc_destroyWeak(id*);
llvm::Constant * clang_arc_use
void clang.arc.use(...);
CoverageMappingModuleGen * getCoverageMapping() const
llvm::Module & getModule() const
ExplicitCastExpr - An explicit cast written in the source code.
Definition: Expr.h:3190
uint64_t SanitizerMask
Definition: Sanitizers.h:26
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2552
Implements C++ ABI-specific code generation functions.
Definition: CGCXXABI.h:44
ObjCEncodeExpr, used for @encode in Objective-C.
Definition: ExprObjC.h:386
This class organizes the cross-module state that is used while lowering AST types to LLVM types...
Definition: CodeGenTypes.h:119
bool hasDiagnostics()
Whether or not the stats we&#39;ve gathered indicate any potential problems.
This class records statistics on instrumentation based profiling.
llvm::Constant * objc_retainAutorelease
id objc_retainAutorelease(id);
CodeGenOptions - Track various options which control how the code is optimized and passed to the back...
void setAtomicSetterHelperFnMap(QualType Ty, llvm::Constant *Fn)
llvm::MDNode * getNoObjCARCExceptionsMetadata()
llvm::Constant * objc_moveWeak
void objc_moveWeak(id *dest, id *src);
A pair of helper functions for a __block variable.
static llvm::Constant * EmitNullConstant(CodeGenModule &CGM, const RecordDecl *record, bool asCompleteObject)
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
MicrosoftVTableContext & getMicrosoftVTableContext()
Definition: CGVTables.h:83
Represents a C++ struct/union/class.
Definition: DeclCXX.h:300
A specialization of Address that requires the address to be an LLVM Constant.
Definition: Address.h:75
llvm::Constant * objc_autoreleaseRuntimeFunction
id objc_autorelease(id); Note this is the runtime method not the intrinsic.
OrderGlobalInits(unsigned int p, unsigned int l)
StringLiteral - This represents a string literal expression, e.g.
Definition: Expr.h:1566
HeaderSearchOptions - Helper class for storing options related to the initialization of the HeaderSea...
CGCXXABI & getCXXABI() const
GVALinkage
A more specific kind of linkage than enum Linkage.
Definition: Linkage.h:74
This structure provides a set of types that are commonly used during IR emission. ...
llvm::Constant * objc_retainRuntimeFunction
id objc_retain(id); Note this is the runtime method not the intrinsic.
CodeGenVTables & getVTables()
LValue - This represents an lvalue references.
Definition: CGValue.h:167
This represents a decl that may have a name.
Definition: Decl.h:249
A Microsoft C++ __uuidof expression, which gets the _GUID that corresponds to the supplied type or ex...
Definition: ExprCXX.h:887
SanitizerMetadata * getSanitizerMetadata()
llvm::Constant * objc_retainAutoreleaseReturnValue
id objc_retainAutoreleaseReturnValue(id);
This represents &#39;#pragma omp threadprivate ...&#39; directive.
Definition: DeclOpenMP.h:40
Abstract information about a function or function prototype.
Definition: CGCall.h:45
const llvm::Triple & getTriple() const