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CodeGenModule.h
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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/Attr.h"
21 #include "clang/AST/DeclCXX.h"
22 #include "clang/AST/DeclObjC.h"
23 #include "clang/AST/DeclOpenMP.h"
24 #include "clang/AST/GlobalDecl.h"
25 #include "clang/AST/Mangle.h"
26 #include "clang/Basic/ABI.h"
28 #include "clang/Basic/Module.h"
30 #include "clang/Basic/XRayLists.h"
31 #include "llvm/ADT/DenseMap.h"
32 #include "llvm/ADT/SetVector.h"
33 #include "llvm/ADT/SmallPtrSet.h"
34 #include "llvm/ADT/StringMap.h"
35 #include "llvm/IR/Module.h"
36 #include "llvm/IR/ValueHandle.h"
37 #include "llvm/Transforms/Utils/SanitizerStats.h"
38 
39 namespace llvm {
40 class Module;
41 class Constant;
42 class ConstantInt;
43 class Function;
44 class GlobalValue;
45 class DataLayout;
46 class FunctionType;
47 class LLVMContext;
48 class IndexedInstrProfReader;
49 }
50 
51 namespace clang {
52 class ASTContext;
53 class AtomicType;
54 class FunctionDecl;
55 class IdentifierInfo;
56 class ObjCMethodDecl;
57 class ObjCImplementationDecl;
58 class ObjCCategoryImplDecl;
59 class ObjCProtocolDecl;
60 class ObjCEncodeExpr;
61 class BlockExpr;
62 class CharUnits;
63 class Decl;
64 class Expr;
65 class Stmt;
66 class InitListExpr;
67 class StringLiteral;
68 class NamedDecl;
69 class ValueDecl;
70 class VarDecl;
71 class LangOptions;
72 class CodeGenOptions;
73 class HeaderSearchOptions;
74 class PreprocessorOptions;
75 class DiagnosticsEngine;
76 class AnnotateAttr;
77 class CXXDestructorDecl;
78 class Module;
79 class CoverageSourceInfo;
80 
81 namespace CodeGen {
82 
83 class CallArgList;
84 class CodeGenFunction;
85 class CodeGenTBAA;
86 class CGCXXABI;
87 class CGDebugInfo;
88 class CGObjCRuntime;
89 class CGOpenCLRuntime;
90 class CGOpenMPRuntime;
91 class CGCUDARuntime;
92 class BlockFieldFlags;
93 class FunctionArgList;
94 class CoverageMappingModuleGen;
95 class TargetCodeGenInfo;
96 
97 enum ForDefinition_t : bool {
100 };
101 
103  unsigned int priority;
104  unsigned int lex_order;
105  OrderGlobalInits(unsigned int p, unsigned int l)
106  : priority(p), lex_order(l) {}
107 
108  bool operator==(const OrderGlobalInits &RHS) const {
109  return priority == RHS.priority && lex_order == RHS.lex_order;
110  }
111 
112  bool operator<(const OrderGlobalInits &RHS) const {
113  return std::tie(priority, lex_order) <
114  std::tie(RHS.priority, RHS.lex_order);
115  }
116 };
117 
119  ObjCEntrypoints() { memset(this, 0, sizeof(*this)); }
120 
121  /// void objc_alloc(id);
122  llvm::Constant *objc_alloc;
123 
124  /// void objc_allocWithZone(id);
125  llvm::Constant *objc_allocWithZone;
126 
127  /// void objc_autoreleasePoolPop(void*);
128  llvm::Constant *objc_autoreleasePoolPop;
129 
130  /// void objc_autoreleasePoolPop(void*);
131  /// Note this method is used when we are using exception handling
133 
134  /// void *objc_autoreleasePoolPush(void);
135  llvm::Constant *objc_autoreleasePoolPush;
136 
137  /// id objc_autorelease(id);
138  llvm::Constant *objc_autorelease;
139 
140  /// id objc_autorelease(id);
141  /// Note this is the runtime method not the intrinsic.
143 
144  /// id objc_autoreleaseReturnValue(id);
146 
147  /// void objc_copyWeak(id *dest, id *src);
148  llvm::Constant *objc_copyWeak;
149 
150  /// void objc_destroyWeak(id*);
151  llvm::Constant *objc_destroyWeak;
152 
153  /// id objc_initWeak(id*, id);
154  llvm::Constant *objc_initWeak;
155 
156  /// id objc_loadWeak(id*);
157  llvm::Constant *objc_loadWeak;
158 
159  /// id objc_loadWeakRetained(id*);
160  llvm::Constant *objc_loadWeakRetained;
161 
162  /// void objc_moveWeak(id *dest, id *src);
163  llvm::Constant *objc_moveWeak;
164 
165  /// id objc_retain(id);
166  llvm::Constant *objc_retain;
167 
168  /// id objc_retain(id);
169  /// Note this is the runtime method not the intrinsic.
170  llvm::Constant *objc_retainRuntimeFunction;
171 
172  /// id objc_retainAutorelease(id);
173  llvm::Constant *objc_retainAutorelease;
174 
175  /// id objc_retainAutoreleaseReturnValue(id);
177 
178  /// id objc_retainAutoreleasedReturnValue(id);
180 
181  /// id objc_retainBlock(id);
182  llvm::Constant *objc_retainBlock;
183 
184  /// void objc_release(id);
185  llvm::Constant *objc_release;
186 
187  /// void objc_release(id);
188  /// Note this is the runtime method not the intrinsic.
190 
191  /// void objc_storeStrong(id*, id);
192  llvm::Constant *objc_storeStrong;
193 
194  /// id objc_storeWeak(id*, id);
195  llvm::Constant *objc_storeWeak;
196 
197  /// id objc_unsafeClaimAutoreleasedReturnValue(id);
199 
200  /// A void(void) inline asm to use to mark that the return value of
201  /// a call will be immediately retain.
203 
204  /// void clang.arc.use(...);
205  llvm::Constant *clang_arc_use;
206 };
207 
208 /// This class records statistics on instrumentation based profiling.
210  uint32_t VisitedInMainFile;
211  uint32_t MissingInMainFile;
212  uint32_t Visited;
213  uint32_t Missing;
214  uint32_t Mismatched;
215 
216 public:
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.
253 
254  BlockByrefHelpers(CharUnits alignment) : Alignment(alignment) {}
255  BlockByrefHelpers(const BlockByrefHelpers &) = default;
256  virtual ~BlockByrefHelpers();
257 
258  void Profile(llvm::FoldingSetNodeID &id) const {
259  id.AddInteger(Alignment.getQuantity());
260  profileImpl(id);
261  }
262  virtual void profileImpl(llvm::FoldingSetNodeID &id) const = 0;
263 
264  virtual bool needsCopy() const { return true; }
265  virtual void emitCopy(CodeGenFunction &CGF, Address dest, Address src) = 0;
266 
267  virtual bool needsDispose() const { return true; }
268  virtual void emitDispose(CodeGenFunction &CGF, Address field) = 0;
269 };
270 
271 /// This class organizes the cross-function state that is used while generating
272 /// LLVM code.
274  CodeGenModule(const CodeGenModule &) = delete;
275  void operator=(const CodeGenModule &) = delete;
276 
277 public:
278  struct Structor {
279  Structor() : Priority(0), Initializer(nullptr), AssociatedData(nullptr) {}
280  Structor(int Priority, llvm::Constant *Initializer,
281  llvm::Constant *AssociatedData)
282  : Priority(Priority), Initializer(Initializer),
283  AssociatedData(AssociatedData) {}
284  int Priority;
285  llvm::Constant *Initializer;
286  llvm::Constant *AssociatedData;
287  };
288 
289  typedef std::vector<Structor> CtorList;
290 
291 private:
292  ASTContext &Context;
293  const LangOptions &LangOpts;
294  const HeaderSearchOptions &HeaderSearchOpts; // Only used for debug info.
295  const PreprocessorOptions &PreprocessorOpts; // Only used for debug info.
296  const CodeGenOptions &CodeGenOpts;
297  llvm::Module &TheModule;
298  DiagnosticsEngine &Diags;
299  const TargetInfo &Target;
300  std::unique_ptr<CGCXXABI> ABI;
301  llvm::LLVMContext &VMContext;
302 
303  std::unique_ptr<CodeGenTBAA> TBAA;
304 
305  mutable std::unique_ptr<TargetCodeGenInfo> TheTargetCodeGenInfo;
306 
307  // This should not be moved earlier, since its initialization depends on some
308  // of the previous reference members being already initialized and also checks
309  // if TheTargetCodeGenInfo is NULL
310  CodeGenTypes Types;
311 
312  /// Holds information about C++ vtables.
313  CodeGenVTables VTables;
314 
315  std::unique_ptr<CGObjCRuntime> ObjCRuntime;
316  std::unique_ptr<CGOpenCLRuntime> OpenCLRuntime;
317  std::unique_ptr<CGOpenMPRuntime> OpenMPRuntime;
318  std::unique_ptr<CGCUDARuntime> CUDARuntime;
319  std::unique_ptr<CGDebugInfo> DebugInfo;
320  std::unique_ptr<ObjCEntrypoints> ObjCData;
321  llvm::MDNode *NoObjCARCExceptionsMetadata = nullptr;
322  std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader;
323  InstrProfStats PGOStats;
324  std::unique_ptr<llvm::SanitizerStatReport> SanStats;
325 
326  // A set of references that have only been seen via a weakref so far. This is
327  // used to remove the weak of the reference if we ever see a direct reference
328  // or a definition.
329  llvm::SmallPtrSet<llvm::GlobalValue*, 10> WeakRefReferences;
330 
331  /// This contains all the decls which have definitions but/ which are deferred
332  /// for emission and therefore should only be output if they are actually
333  /// used. If a decl is in this, then it is known to have not been referenced
334  /// yet.
335  std::map<StringRef, GlobalDecl> DeferredDecls;
336 
337  /// This is a list of deferred decls which we have seen that *are* actually
338  /// referenced. These get code generated when the module is done.
339  std::vector<GlobalDecl> DeferredDeclsToEmit;
340  void addDeferredDeclToEmit(GlobalDecl GD) {
341  DeferredDeclsToEmit.emplace_back(GD);
342  }
343 
344  /// List of alias we have emitted. Used to make sure that what they point to
345  /// is defined once we get to the end of the of the translation unit.
346  std::vector<GlobalDecl> Aliases;
347 
348  /// List of multiversion functions that have to be emitted. Used to make sure
349  /// we properly emit the iFunc.
350  std::vector<GlobalDecl> MultiVersionFuncs;
351 
352  typedef llvm::StringMap<llvm::TrackingVH<llvm::Constant> > ReplacementsTy;
353  ReplacementsTy Replacements;
354 
355  /// List of global values to be replaced with something else. Used when we
356  /// want to replace a GlobalValue but can't identify it by its mangled name
357  /// anymore (because the name is already taken).
359  GlobalValReplacements;
360 
361  /// Set of global decls for which we already diagnosed mangled name conflict.
362  /// Required to not issue a warning (on a mangling conflict) multiple times
363  /// for the same decl.
364  llvm::DenseSet<GlobalDecl> DiagnosedConflictingDefinitions;
365 
366  /// A queue of (optional) vtables to consider emitting.
367  std::vector<const CXXRecordDecl*> DeferredVTables;
368 
369  /// A queue of (optional) vtables that may be emitted opportunistically.
370  std::vector<const CXXRecordDecl *> OpportunisticVTables;
371 
372  /// List of global values which are required to be present in the object file;
373  /// bitcast to i8*. This is used for forcing visibility of symbols which may
374  /// otherwise be optimized out.
375  std::vector<llvm::WeakTrackingVH> LLVMUsed;
376  std::vector<llvm::WeakTrackingVH> LLVMCompilerUsed;
377 
378  /// Store the list of global constructors and their respective priorities to
379  /// be emitted when the translation unit is complete.
380  CtorList GlobalCtors;
381 
382  /// Store the list of global destructors and their respective priorities to be
383  /// emitted when the translation unit is complete.
384  CtorList GlobalDtors;
385 
386  /// An ordered map of canonical GlobalDecls to their mangled names.
387  llvm::MapVector<GlobalDecl, StringRef> MangledDeclNames;
388  llvm::StringMap<GlobalDecl, llvm::BumpPtrAllocator> Manglings;
389 
390  // An ordered map of canonical GlobalDecls paired with the cpu-index for
391  // cpu-specific name manglings.
392  llvm::MapVector<std::pair<GlobalDecl, unsigned>, StringRef>
393  CPUSpecificMangledDeclNames;
394  llvm::StringMap<std::pair<GlobalDecl, unsigned>, llvm::BumpPtrAllocator>
395  CPUSpecificManglings;
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  llvm::StringMap<llvm::GlobalVariable *> CFConstantStringMap;
404 
405  llvm::DenseMap<llvm::Constant *, llvm::GlobalVariable *> ConstantStringMap;
406  llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap;
407  llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap;
408  llvm::DenseMap<const Expr*, llvm::Constant *> MaterializedGlobalTemporaryMap;
409 
410  llvm::DenseMap<QualType, llvm::Constant *> AtomicSetterHelperFnMap;
411  llvm::DenseMap<QualType, llvm::Constant *> AtomicGetterHelperFnMap;
412 
413  /// Map used to get unique type descriptor constants for sanitizers.
414  llvm::DenseMap<QualType, llvm::Constant *> TypeDescriptorMap;
415 
416  /// Map used to track internal linkage functions declared within
417  /// extern "C" regions.
418  typedef llvm::MapVector<IdentifierInfo *,
419  llvm::GlobalValue *> StaticExternCMap;
420  StaticExternCMap StaticExternCValues;
421 
422  /// thread_local variables defined or used in this TU.
423  std::vector<const VarDecl *> CXXThreadLocals;
424 
425  /// thread_local variables with initializers that need to run
426  /// before any thread_local variable in this TU is odr-used.
427  std::vector<llvm::Function *> CXXThreadLocalInits;
428  std::vector<const VarDecl *> CXXThreadLocalInitVars;
429 
430  /// Global variables with initializers that need to run before main.
431  std::vector<llvm::Function *> CXXGlobalInits;
432 
433  /// When a C++ decl with an initializer is deferred, null is
434  /// appended to CXXGlobalInits, and the index of that null is placed
435  /// here so that the initializer will be performed in the correct
436  /// order. Once the decl is emitted, the index is replaced with ~0U to ensure
437  /// that we don't re-emit the initializer.
438  llvm::DenseMap<const Decl*, unsigned> DelayedCXXInitPosition;
439 
440  typedef std::pair<OrderGlobalInits, llvm::Function*> GlobalInitData;
441 
442  struct GlobalInitPriorityCmp {
443  bool operator()(const GlobalInitData &LHS,
444  const GlobalInitData &RHS) const {
445  return LHS.first.priority < RHS.first.priority;
446  }
447  };
448 
449  /// Global variables with initializers whose order of initialization is set by
450  /// init_priority attribute.
451  SmallVector<GlobalInitData, 8> PrioritizedCXXGlobalInits;
452 
453  /// Global destructor functions and arguments that need to run on termination.
454  std::vector<std::pair<llvm::WeakTrackingVH, llvm::Constant *>> CXXGlobalDtors;
455 
456  /// The complete set of modules that has been imported.
457  llvm::SetVector<clang::Module *> ImportedModules;
458 
459  /// The set of modules for which the module initializers
460  /// have been emitted.
461  llvm::SmallPtrSet<clang::Module *, 16> EmittedModuleInitializers;
462 
463  /// A vector of metadata strings.
464  SmallVector<llvm::MDNode *, 16> LinkerOptionsMetadata;
465 
466  /// @name Cache for Objective-C runtime types
467  /// @{
468 
469  /// Cached reference to the class for constant strings. This value has type
470  /// int * but is actually an Obj-C class pointer.
471  llvm::WeakTrackingVH CFConstantStringClassRef;
472 
473  /// The type used to describe the state of a fast enumeration in
474  /// Objective-C's for..in loop.
475  QualType ObjCFastEnumerationStateType;
476 
477  /// @}
478 
479  /// Lazily create the Objective-C runtime
480  void createObjCRuntime();
481 
482  void createOpenCLRuntime();
483  void createOpenMPRuntime();
484  void createCUDARuntime();
485 
486  bool isTriviallyRecursive(const FunctionDecl *F);
487  bool shouldEmitFunction(GlobalDecl GD);
488  bool shouldOpportunisticallyEmitVTables();
489  /// Map used to be sure we don't emit the same CompoundLiteral twice.
490  llvm::DenseMap<const CompoundLiteralExpr *, llvm::GlobalVariable *>
491  EmittedCompoundLiterals;
492 
493  /// Map of the global blocks we've emitted, so that we don't have to re-emit
494  /// them if the constexpr evaluator gets aggressive.
495  llvm::DenseMap<const BlockExpr *, llvm::Constant *> EmittedGlobalBlocks;
496 
497  /// @name Cache for Blocks Runtime Globals
498  /// @{
499 
500  llvm::Constant *NSConcreteGlobalBlock = nullptr;
501  llvm::Constant *NSConcreteStackBlock = nullptr;
502 
503  llvm::Constant *BlockObjectAssign = nullptr;
504  llvm::Constant *BlockObjectDispose = nullptr;
505 
506  llvm::Type *BlockDescriptorType = nullptr;
507  llvm::Type *GenericBlockLiteralType = nullptr;
508 
509  struct {
511  } Block;
512 
513  /// void @llvm.lifetime.start(i64 %size, i8* nocapture <ptr>)
514  llvm::Constant *LifetimeStartFn = nullptr;
515 
516  /// void @llvm.lifetime.end(i64 %size, i8* nocapture <ptr>)
517  llvm::Constant *LifetimeEndFn = nullptr;
518 
519  GlobalDecl initializedGlobalDecl;
520 
521  std::unique_ptr<SanitizerMetadata> SanitizerMD;
522 
523  /// @}
524 
525  llvm::MapVector<const Decl *, bool> DeferredEmptyCoverageMappingDecls;
526 
527  std::unique_ptr<CoverageMappingModuleGen> CoverageMapping;
528 
529  /// Mapping from canonical types to their metadata identifiers. We need to
530  /// maintain this mapping because identifiers may be formed from distinct
531  /// MDNodes.
532  typedef llvm::DenseMap<QualType, llvm::Metadata *> MetadataTypeMap;
533  MetadataTypeMap MetadataIdMap;
534  MetadataTypeMap VirtualMetadataIdMap;
535  MetadataTypeMap GeneralizedMetadataIdMap;
536 
537 public:
538  CodeGenModule(ASTContext &C, const HeaderSearchOptions &headersearchopts,
539  const PreprocessorOptions &ppopts,
540  const CodeGenOptions &CodeGenOpts, llvm::Module &M,
541  DiagnosticsEngine &Diags,
542  CoverageSourceInfo *CoverageInfo = nullptr);
543 
544  ~CodeGenModule();
545 
546  void clear();
547 
548  /// Finalize LLVM code generation.
549  void Release();
550 
551  /// Return true if we should emit location information for expressions.
552  bool getExpressionLocationsEnabled() const;
553 
554  /// Return a reference to the configured Objective-C runtime.
556  if (!ObjCRuntime) createObjCRuntime();
557  return *ObjCRuntime;
558  }
559 
560  /// Return true iff an Objective-C runtime has been configured.
561  bool hasObjCRuntime() { return !!ObjCRuntime; }
562 
563  /// Return a reference to the configured OpenCL runtime.
565  assert(OpenCLRuntime != nullptr);
566  return *OpenCLRuntime;
567  }
568 
569  /// Return a reference to the configured OpenMP runtime.
571  assert(OpenMPRuntime != nullptr);
572  return *OpenMPRuntime;
573  }
574 
575  /// Return a reference to the configured CUDA runtime.
577  assert(CUDARuntime != nullptr);
578  return *CUDARuntime;
579  }
580 
582  assert(ObjCData != nullptr);
583  return *ObjCData;
584  }
585 
586  // Version checking function, used to implement ObjC's @available:
587  // i32 @__isOSVersionAtLeast(i32, i32, i32)
588  llvm::Constant *IsOSVersionAtLeastFn = nullptr;
589 
590  InstrProfStats &getPGOStats() { return PGOStats; }
591  llvm::IndexedInstrProfReader *getPGOReader() const { return PGOReader.get(); }
592 
594  return CoverageMapping.get();
595  }
596 
597  llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) {
598  return StaticLocalDeclMap[D];
599  }
601  llvm::Constant *C) {
602  StaticLocalDeclMap[D] = C;
603  }
604 
605  llvm::Constant *
606  getOrCreateStaticVarDecl(const VarDecl &D,
607  llvm::GlobalValue::LinkageTypes Linkage);
608 
609  llvm::GlobalVariable *getStaticLocalDeclGuardAddress(const VarDecl *D) {
610  return StaticLocalDeclGuardMap[D];
611  }
613  llvm::GlobalVariable *C) {
614  StaticLocalDeclGuardMap[D] = C;
615  }
616 
617  bool lookupRepresentativeDecl(StringRef MangledName,
618  GlobalDecl &Result) const;
619 
620  llvm::Constant *getAtomicSetterHelperFnMap(QualType Ty) {
621  return AtomicSetterHelperFnMap[Ty];
622  }
624  llvm::Constant *Fn) {
625  AtomicSetterHelperFnMap[Ty] = Fn;
626  }
627 
628  llvm::Constant *getAtomicGetterHelperFnMap(QualType Ty) {
629  return AtomicGetterHelperFnMap[Ty];
630  }
632  llvm::Constant *Fn) {
633  AtomicGetterHelperFnMap[Ty] = Fn;
634  }
635 
636  llvm::Constant *getTypeDescriptorFromMap(QualType Ty) {
637  return TypeDescriptorMap[Ty];
638  }
639  void setTypeDescriptorInMap(QualType Ty, llvm::Constant *C) {
640  TypeDescriptorMap[Ty] = C;
641  }
642 
643  CGDebugInfo *getModuleDebugInfo() { return DebugInfo.get(); }
644 
646  if (!NoObjCARCExceptionsMetadata)
647  NoObjCARCExceptionsMetadata = llvm::MDNode::get(getLLVMContext(), None);
648  return NoObjCARCExceptionsMetadata;
649  }
650 
651  ASTContext &getContext() const { return Context; }
652  const LangOptions &getLangOpts() const { return LangOpts; }
654  const { return HeaderSearchOpts; }
656  const { return PreprocessorOpts; }
657  const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; }
658  llvm::Module &getModule() const { return TheModule; }
659  DiagnosticsEngine &getDiags() const { return Diags; }
660  const llvm::DataLayout &getDataLayout() const {
661  return TheModule.getDataLayout();
662  }
663  const TargetInfo &getTarget() const { return Target; }
664  const llvm::Triple &getTriple() const { return Target.getTriple(); }
665  bool supportsCOMDAT() const;
666  void maybeSetTrivialComdat(const Decl &D, llvm::GlobalObject &GO);
667 
668  CGCXXABI &getCXXABI() const { return *ABI; }
669  llvm::LLVMContext &getLLVMContext() { return VMContext; }
670 
671  bool shouldUseTBAA() const { return TBAA != nullptr; }
672 
673  const TargetCodeGenInfo &getTargetCodeGenInfo();
674 
675  CodeGenTypes &getTypes() { return Types; }
676 
677  CodeGenVTables &getVTables() { return VTables; }
678 
680  return VTables.getItaniumVTableContext();
681  }
682 
684  return VTables.getMicrosoftVTableContext();
685  }
686 
687  CtorList &getGlobalCtors() { return GlobalCtors; }
688  CtorList &getGlobalDtors() { return GlobalDtors; }
689 
690  /// getTBAATypeInfo - Get metadata used to describe accesses to objects of
691  /// the given type.
692  llvm::MDNode *getTBAATypeInfo(QualType QTy);
693 
694  /// getTBAAAccessInfo - Get TBAA information that describes an access to
695  /// an object of the given type.
696  TBAAAccessInfo getTBAAAccessInfo(QualType AccessType);
697 
698  /// getTBAAVTablePtrAccessInfo - Get the TBAA information that describes an
699  /// access to a virtual table pointer.
700  TBAAAccessInfo getTBAAVTablePtrAccessInfo(llvm::Type *VTablePtrType);
701 
702  llvm::MDNode *getTBAAStructInfo(QualType QTy);
703 
704  /// getTBAABaseTypeInfo - Get metadata that describes the given base access
705  /// type. Return null if the type is not suitable for use in TBAA access tags.
706  llvm::MDNode *getTBAABaseTypeInfo(QualType QTy);
707 
708  /// getTBAAAccessTagInfo - Get TBAA tag for a given memory access.
709  llvm::MDNode *getTBAAAccessTagInfo(TBAAAccessInfo Info);
710 
711  /// mergeTBAAInfoForCast - Get merged TBAA information for the purposes of
712  /// type casts.
713  TBAAAccessInfo mergeTBAAInfoForCast(TBAAAccessInfo SourceInfo,
715 
716  /// mergeTBAAInfoForConditionalOperator - Get merged TBAA information for the
717  /// purposes of conditional operator.
718  TBAAAccessInfo mergeTBAAInfoForConditionalOperator(TBAAAccessInfo InfoA,
719  TBAAAccessInfo InfoB);
720 
721  /// mergeTBAAInfoForMemoryTransfer - Get merged TBAA information for the
722  /// purposes of memory transfer calls.
723  TBAAAccessInfo mergeTBAAInfoForMemoryTransfer(TBAAAccessInfo DestInfo,
724  TBAAAccessInfo SrcInfo);
725 
726  /// getTBAAInfoForSubobject - Get TBAA information for an access with a given
727  /// base lvalue.
729  if (Base.getTBAAInfo().isMayAlias())
730  return TBAAAccessInfo::getMayAliasInfo();
731  return getTBAAAccessInfo(AccessType);
732  }
733 
734  bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor);
735 
736  bool isPaddedAtomicType(QualType type);
737  bool isPaddedAtomicType(const AtomicType *type);
738 
739  /// DecorateInstructionWithTBAA - Decorate the instruction with a TBAA tag.
740  void DecorateInstructionWithTBAA(llvm::Instruction *Inst,
741  TBAAAccessInfo TBAAInfo);
742 
743  /// Adds !invariant.barrier !tag to instruction
744  void DecorateInstructionWithInvariantGroup(llvm::Instruction *I,
745  const CXXRecordDecl *RD);
746 
747  /// Emit the given number of characters as a value of type size_t.
748  llvm::ConstantInt *getSize(CharUnits numChars);
749 
750  /// Set the visibility for the given LLVM GlobalValue.
751  void setGlobalVisibility(llvm::GlobalValue *GV, const NamedDecl *D) const;
752 
753  void setGlobalVisibilityAndLocal(llvm::GlobalValue *GV,
754  const NamedDecl *D) const;
755 
756  void setDSOLocal(llvm::GlobalValue *GV) const;
757 
758  void setDLLImportDLLExport(llvm::GlobalValue *GV, GlobalDecl D) const;
759  void setDLLImportDLLExport(llvm::GlobalValue *GV, const NamedDecl *D) const;
760  /// Set visibility, dllimport/dllexport and dso_local.
761  /// This must be called after dllimport/dllexport is set.
762  void setGVProperties(llvm::GlobalValue *GV, GlobalDecl GD) const;
763  void setGVProperties(llvm::GlobalValue *GV, const NamedDecl *D) const;
764 
765  /// Set the TLS mode for the given LLVM GlobalValue for the thread-local
766  /// variable declaration D.
767  void setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) const;
768 
769  static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V) {
770  switch (V) {
774  }
775  llvm_unreachable("unknown visibility!");
776  }
777 
778  llvm::Constant *GetAddrOfGlobal(GlobalDecl GD,
779  ForDefinition_t IsForDefinition
780  = NotForDefinition);
781 
782  /// Will return a global variable of the given type. If a variable with a
783  /// different type already exists then a new variable with the right type
784  /// will be created and all uses of the old variable will be replaced with a
785  /// bitcast to the new variable.
786  llvm::GlobalVariable *
787  CreateOrReplaceCXXRuntimeVariable(StringRef Name, llvm::Type *Ty,
788  llvm::GlobalValue::LinkageTypes Linkage,
789  unsigned Alignment);
790 
791  llvm::Function *
792  CreateGlobalInitOrDestructFunction(llvm::FunctionType *ty, const Twine &name,
793  const CGFunctionInfo &FI,
795  bool TLS = false);
796 
797  /// Return the AST address space of the underlying global variable for D, as
798  /// determined by its declaration. Normally this is the same as the address
799  /// space of D's type, but in CUDA, address spaces are associated with
800  /// declarations, not types. If D is nullptr, return the default address
801  /// space for global variable.
802  ///
803  /// For languages without explicit address spaces, if D has default address
804  /// space, target-specific global or constant address space may be returned.
805  LangAS GetGlobalVarAddressSpace(const VarDecl *D);
806 
807  /// Return the llvm::Constant for the address of the given global variable.
808  /// If Ty is non-null and if the global doesn't exist, then it will be created
809  /// with the specified type instead of whatever the normal requested type
810  /// would be. If IsForDefinition is true, it is guaranteed that an actual
811  /// global with type Ty will be returned, not conversion of a variable with
812  /// the same mangled name but some other type.
813  llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D,
814  llvm::Type *Ty = nullptr,
815  ForDefinition_t IsForDefinition
816  = NotForDefinition);
817 
818  /// Return the AST address space of string literal, which is used to emit
819  /// the string literal as global variable in LLVM IR.
820  /// Note: This is not necessarily the address space of the string literal
821  /// in AST. For address space agnostic language, e.g. C++, string literal
822  /// in AST is always in default address space.
823  LangAS getStringLiteralAddressSpace() const;
824 
825  /// Return the address of the given function. If Ty is non-null, then this
826  /// function will use the specified type if it has to create it.
827  llvm::Constant *GetAddrOfFunction(GlobalDecl GD, llvm::Type *Ty = nullptr,
828  bool ForVTable = false,
829  bool DontDefer = false,
830  ForDefinition_t IsForDefinition
831  = NotForDefinition);
832 
833  /// Get the address of the RTTI descriptor for the given type.
834  llvm::Constant *GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH = false);
835 
836  /// Get the address of a uuid descriptor .
837  ConstantAddress GetAddrOfUuidDescriptor(const CXXUuidofExpr* E);
838 
839  /// Get the address of the thunk for the given global decl.
840  llvm::Constant *GetAddrOfThunk(StringRef Name, llvm::Type *FnTy,
841  GlobalDecl GD);
842 
843  /// Get a reference to the target of VD.
844  ConstantAddress GetWeakRefReference(const ValueDecl *VD);
845 
846  /// Returns the assumed alignment of an opaque pointer to the given class.
847  CharUnits getClassPointerAlignment(const CXXRecordDecl *CD);
848 
849  /// Returns the assumed alignment of a virtual base of a class.
850  CharUnits getVBaseAlignment(CharUnits DerivedAlign,
851  const CXXRecordDecl *Derived,
852  const CXXRecordDecl *VBase);
853 
854  /// Given a class pointer with an actual known alignment, and the
855  /// expected alignment of an object at a dynamic offset w.r.t that
856  /// pointer, return the alignment to assume at the offset.
857  CharUnits getDynamicOffsetAlignment(CharUnits ActualAlign,
858  const CXXRecordDecl *Class,
859  CharUnits ExpectedTargetAlign);
860 
861  CharUnits
862  computeNonVirtualBaseClassOffset(const CXXRecordDecl *DerivedClass,
865 
866  /// Returns the offset from a derived class to a class. Returns null if the
867  /// offset is 0.
868  llvm::Constant *
869  GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl,
872 
873  llvm::FoldingSet<BlockByrefHelpers> ByrefHelpersCache;
874 
875  /// Fetches the global unique block count.
876  int getUniqueBlockCount() { return ++Block.GlobalUniqueCount; }
877 
878  /// Fetches the type of a generic block descriptor.
879  llvm::Type *getBlockDescriptorType();
880 
881  /// The type of a generic block literal.
882  llvm::Type *getGenericBlockLiteralType();
883 
884  /// Gets the address of a block which requires no captures.
885  llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, StringRef Name);
886 
887  /// Returns the address of a block which requires no caputres, or null if
888  /// we've yet to emit the block for BE.
889  llvm::Constant *getAddrOfGlobalBlockIfEmitted(const BlockExpr *BE) {
890  return EmittedGlobalBlocks.lookup(BE);
891  }
892 
893  /// Notes that BE's global block is available via Addr. Asserts that BE
894  /// isn't already emitted.
895  void setAddrOfGlobalBlock(const BlockExpr *BE, llvm::Constant *Addr);
896 
897  /// Return a pointer to a constant CFString object for the given string.
898  ConstantAddress GetAddrOfConstantCFString(const StringLiteral *Literal);
899 
900  /// Return a pointer to a constant NSString object for the given string. Or a
901  /// user defined String object as defined via
902  /// -fconstant-string-class=class_name option.
903  ConstantAddress GetAddrOfConstantString(const StringLiteral *Literal);
904 
905  /// Return a constant array for the given string.
906  llvm::Constant *GetConstantArrayFromStringLiteral(const StringLiteral *E);
907 
908  /// Return a pointer to a constant array for the given string literal.
910  GetAddrOfConstantStringFromLiteral(const StringLiteral *S,
911  StringRef Name = ".str");
912 
913  /// Return a pointer to a constant array for the given ObjCEncodeExpr node.
915  GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *);
916 
917  /// Returns a pointer to a character array containing the literal and a
918  /// terminating '\0' character. The result has pointer to array type.
919  ///
920  /// \param GlobalName If provided, the name to use for the global (if one is
921  /// created).
923  GetAddrOfConstantCString(const std::string &Str,
924  const char *GlobalName = nullptr);
925 
926  /// Returns a pointer to a constant global variable for the given file-scope
927  /// compound literal expression.
928  ConstantAddress GetAddrOfConstantCompoundLiteral(const CompoundLiteralExpr*E);
929 
930  /// If it's been emitted already, returns the GlobalVariable corresponding to
931  /// a compound literal. Otherwise, returns null.
932  llvm::GlobalVariable *
933  getAddrOfConstantCompoundLiteralIfEmitted(const CompoundLiteralExpr *E);
934 
935  /// Notes that CLE's GlobalVariable is GV. Asserts that CLE isn't already
936  /// emitted.
937  void setAddrOfConstantCompoundLiteral(const CompoundLiteralExpr *CLE,
938  llvm::GlobalVariable *GV);
939 
940  /// Returns a pointer to a global variable representing a temporary
941  /// with static or thread storage duration.
942  ConstantAddress GetAddrOfGlobalTemporary(const MaterializeTemporaryExpr *E,
943  const Expr *Inner);
944 
945  /// Retrieve the record type that describes the state of an
946  /// Objective-C fast enumeration loop (for..in).
947  QualType getObjCFastEnumerationStateType();
948 
949  // Produce code for this constructor/destructor. This method doesn't try
950  // to apply any ABI rules about which other constructors/destructors
951  // are needed or if they are alias to each other.
952  llvm::Function *codegenCXXStructor(const CXXMethodDecl *MD,
954 
955  /// Return the address of the constructor/destructor of the given type.
956  llvm::Constant *
957  getAddrOfCXXStructor(const CXXMethodDecl *MD, StructorType Type,
958  const CGFunctionInfo *FnInfo = nullptr,
959  llvm::FunctionType *FnType = nullptr,
960  bool DontDefer = false,
961  ForDefinition_t IsForDefinition = NotForDefinition);
962 
963  /// Given a builtin id for a function like "__builtin_fabsf", return a
964  /// Function* for "fabsf".
965  llvm::Constant *getBuiltinLibFunction(const FunctionDecl *FD,
966  unsigned BuiltinID);
967 
968  llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys = None);
969 
970  /// Emit code for a single top level declaration.
971  void EmitTopLevelDecl(Decl *D);
972 
973  /// Stored a deferred empty coverage mapping for an unused
974  /// and thus uninstrumented top level declaration.
975  void AddDeferredUnusedCoverageMapping(Decl *D);
976 
977  /// Remove the deferred empty coverage mapping as this
978  /// declaration is actually instrumented.
979  void ClearUnusedCoverageMapping(const Decl *D);
980 
981  /// Emit all the deferred coverage mappings
982  /// for the uninstrumented functions.
983  void EmitDeferredUnusedCoverageMappings();
984 
985  /// Tell the consumer that this variable has been instantiated.
986  void HandleCXXStaticMemberVarInstantiation(VarDecl *VD);
987 
988  /// If the declaration has internal linkage but is inside an
989  /// extern "C" linkage specification, prepare to emit an alias for it
990  /// to the expected name.
991  template<typename SomeDecl>
992  void MaybeHandleStaticInExternC(const SomeDecl *D, llvm::GlobalValue *GV);
993 
994  /// Add a global to a list to be added to the llvm.used metadata.
995  void addUsedGlobal(llvm::GlobalValue *GV);
996 
997  /// Add a global to a list to be added to the llvm.compiler.used metadata.
998  void addCompilerUsedGlobal(llvm::GlobalValue *GV);
999 
1000  /// Add a destructor and object to add to the C++ global destructor function.
1001  void AddCXXDtorEntry(llvm::Constant *DtorFn, llvm::Constant *Object) {
1002  CXXGlobalDtors.emplace_back(DtorFn, Object);
1003  }
1004 
1005  /// Create a new runtime function with the specified type and name.
1006  llvm::Constant *
1007  CreateRuntimeFunction(llvm::FunctionType *Ty, StringRef Name,
1008  llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
1009  bool Local = false);
1010 
1011  /// Create a new compiler builtin function with the specified type and name.
1012  llvm::Constant *
1013  CreateBuiltinFunction(llvm::FunctionType *Ty, StringRef Name,
1014  llvm::AttributeList ExtraAttrs = llvm::AttributeList());
1015  /// Create a new runtime global variable with the specified type and name.
1016  llvm::Constant *CreateRuntimeVariable(llvm::Type *Ty,
1017  StringRef Name);
1018 
1019  ///@name Custom Blocks Runtime Interfaces
1020  ///@{
1021 
1022  llvm::Constant *getNSConcreteGlobalBlock();
1023  llvm::Constant *getNSConcreteStackBlock();
1024  llvm::Constant *getBlockObjectAssign();
1025  llvm::Constant *getBlockObjectDispose();
1026 
1027  ///@}
1028 
1029  llvm::Constant *getLLVMLifetimeStartFn();
1030  llvm::Constant *getLLVMLifetimeEndFn();
1031 
1032  // Make sure that this type is translated.
1033  void UpdateCompletedType(const TagDecl *TD);
1034 
1035  llvm::Constant *getMemberPointerConstant(const UnaryOperator *e);
1036 
1037  /// Emit type info if type of an expression is a variably modified
1038  /// type. Also emit proper debug info for cast types.
1039  void EmitExplicitCastExprType(const ExplicitCastExpr *E,
1040  CodeGenFunction *CGF = nullptr);
1041 
1042  /// Return the result of value-initializing the given type, i.e. a null
1043  /// expression of the given type. This is usually, but not always, an LLVM
1044  /// null constant.
1045  llvm::Constant *EmitNullConstant(QualType T);
1046 
1047  /// Return a null constant appropriate for zero-initializing a base class with
1048  /// the given type. This is usually, but not always, an LLVM null constant.
1049  llvm::Constant *EmitNullConstantForBase(const CXXRecordDecl *Record);
1050 
1051  /// Emit a general error that something can't be done.
1052  void Error(SourceLocation loc, StringRef error);
1053 
1054  /// Print out an error that codegen doesn't support the specified stmt yet.
1055  void ErrorUnsupported(const Stmt *S, const char *Type);
1056 
1057  /// Print out an error that codegen doesn't support the specified decl yet.
1058  void ErrorUnsupported(const Decl *D, const char *Type);
1059 
1060  /// Set the attributes on the LLVM function for the given decl and function
1061  /// info. This applies attributes necessary for handling the ABI as well as
1062  /// user specified attributes like section.
1063  void SetInternalFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1064  const CGFunctionInfo &FI);
1065 
1066  /// Set the LLVM function attributes (sext, zext, etc).
1067  void SetLLVMFunctionAttributes(GlobalDecl GD, const CGFunctionInfo &Info,
1068  llvm::Function *F);
1069 
1070  /// Set the LLVM function attributes which only apply to a function
1071  /// definition.
1072  void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F);
1073 
1074  /// Return true iff the given type uses 'sret' when used as a return type.
1075  bool ReturnTypeUsesSRet(const CGFunctionInfo &FI);
1076 
1077  /// Return true iff the given type uses an argument slot when 'sret' is used
1078  /// as a return type.
1079  bool ReturnSlotInterferesWithArgs(const CGFunctionInfo &FI);
1080 
1081  /// Return true iff the given type uses 'fpret' when used as a return type.
1082  bool ReturnTypeUsesFPRet(QualType ResultType);
1083 
1084  /// Return true iff the given type uses 'fp2ret' when used as a return type.
1085  bool ReturnTypeUsesFP2Ret(QualType ResultType);
1086 
1087  /// Get the LLVM attributes and calling convention to use for a particular
1088  /// function type.
1089  ///
1090  /// \param Name - The function name.
1091  /// \param Info - The function type information.
1092  /// \param CalleeInfo - The callee information these attributes are being
1093  /// constructed for. If valid, the attributes applied to this decl may
1094  /// contribute to the function attributes and calling convention.
1095  /// \param Attrs [out] - On return, the attribute list to use.
1096  /// \param CallingConv [out] - On return, the LLVM calling convention to use.
1097  void ConstructAttributeList(StringRef Name, const CGFunctionInfo &Info,
1098  CGCalleeInfo CalleeInfo,
1099  llvm::AttributeList &Attrs, unsigned &CallingConv,
1100  bool AttrOnCallSite);
1101 
1102  /// Adds attributes to F according to our CodeGenOptions and LangOptions, as
1103  /// though we had emitted it ourselves. We remove any attributes on F that
1104  /// conflict with the attributes we add here.
1105  ///
1106  /// This is useful for adding attrs to bitcode modules that you want to link
1107  /// with but don't control, such as CUDA's libdevice. When linking with such
1108  /// a bitcode library, you might want to set e.g. its functions'
1109  /// "unsafe-fp-math" attribute to match the attr of the functions you're
1110  /// codegen'ing. Otherwise, LLVM will interpret the bitcode module's lack of
1111  /// unsafe-fp-math attrs as tantamount to unsafe-fp-math=false, and then LLVM
1112  /// will propagate unsafe-fp-math=false up to every transitive caller of a
1113  /// function in the bitcode library!
1114  ///
1115  /// With the exception of fast-math attrs, this will only make the attributes
1116  /// on the function more conservative. But it's unsafe to call this on a
1117  /// function which relies on particular fast-math attributes for correctness.
1118  /// It's up to you to ensure that this is safe.
1119  void AddDefaultFnAttrs(llvm::Function &F);
1120 
1121  /// Parses the target attributes passed in, and returns only the ones that are
1122  /// valid feature names.
1123  TargetAttr::ParsedTargetAttr filterFunctionTargetAttrs(const TargetAttr *TD);
1124 
1125  // Fills in the supplied string map with the set of target features for the
1126  // passed in function.
1127  void getFunctionFeatureMap(llvm::StringMap<bool> &FeatureMap, GlobalDecl GD);
1128 
1129  StringRef getMangledName(GlobalDecl GD);
1130  StringRef getBlockMangledName(GlobalDecl GD, const BlockDecl *BD);
1131 
1132  void EmitTentativeDefinition(const VarDecl *D);
1133 
1134  void EmitVTable(CXXRecordDecl *Class);
1135 
1136  void RefreshTypeCacheForClass(const CXXRecordDecl *Class);
1137 
1138  /// Appends Opts to the "llvm.linker.options" metadata value.
1139  void AppendLinkerOptions(StringRef Opts);
1140 
1141  /// Appends a detect mismatch command to the linker options.
1142  void AddDetectMismatch(StringRef Name, StringRef Value);
1143 
1144  /// Appends a dependent lib to the "llvm.linker.options" metadata
1145  /// value.
1146  void AddDependentLib(StringRef Lib);
1147 
1148  void AddELFLibDirective(StringRef Lib);
1149 
1150  llvm::GlobalVariable::LinkageTypes getFunctionLinkage(GlobalDecl GD);
1151 
1152  void setFunctionLinkage(GlobalDecl GD, llvm::Function *F) {
1153  F->setLinkage(getFunctionLinkage(GD));
1154  }
1155 
1156  /// Return the appropriate linkage for the vtable, VTT, and type information
1157  /// of the given class.
1158  llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD);
1159 
1160  /// Return the store size, in character units, of the given LLVM type.
1161  CharUnits GetTargetTypeStoreSize(llvm::Type *Ty) const;
1162 
1163  /// Returns LLVM linkage for a declarator.
1164  llvm::GlobalValue::LinkageTypes
1165  getLLVMLinkageForDeclarator(const DeclaratorDecl *D, GVALinkage Linkage,
1166  bool IsConstantVariable);
1167 
1168  /// Returns LLVM linkage for a declarator.
1169  llvm::GlobalValue::LinkageTypes
1170  getLLVMLinkageVarDefinition(const VarDecl *VD, bool IsConstant);
1171 
1172  /// Emit all the global annotations.
1173  void EmitGlobalAnnotations();
1174 
1175  /// Emit an annotation string.
1176  llvm::Constant *EmitAnnotationString(StringRef Str);
1177 
1178  /// Emit the annotation's translation unit.
1179  llvm::Constant *EmitAnnotationUnit(SourceLocation Loc);
1180 
1181  /// Emit the annotation line number.
1182  llvm::Constant *EmitAnnotationLineNo(SourceLocation L);
1183 
1184  /// Generate the llvm::ConstantStruct which contains the annotation
1185  /// information for a given GlobalValue. The annotation struct is
1186  /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the
1187  /// GlobalValue being annotated. The second field is the constant string
1188  /// created from the AnnotateAttr's annotation. The third field is a constant
1189  /// string containing the name of the translation unit. The fourth field is
1190  /// the line number in the file of the annotated value declaration.
1191  llvm::Constant *EmitAnnotateAttr(llvm::GlobalValue *GV,
1192  const AnnotateAttr *AA,
1193  SourceLocation L);
1194 
1195  /// Add global annotations that are set on D, for the global GV. Those
1196  /// annotations are emitted during finalization of the LLVM code.
1197  void AddGlobalAnnotations(const ValueDecl *D, llvm::GlobalValue *GV);
1198 
1199  bool isInSanitizerBlacklist(SanitizerMask Kind, llvm::Function *Fn,
1200  SourceLocation Loc) const;
1201 
1202  bool isInSanitizerBlacklist(llvm::GlobalVariable *GV, SourceLocation Loc,
1203  QualType Ty,
1204  StringRef Category = StringRef()) const;
1205 
1206  /// Imbue XRay attributes to a function, applying the always/never attribute
1207  /// lists in the process. Returns true if we did imbue attributes this way,
1208  /// false otherwise.
1209  bool imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc,
1210  StringRef Category = StringRef()) const;
1211 
1213  return SanitizerMD.get();
1214  }
1215 
1217  DeferredVTables.push_back(RD);
1218  }
1219 
1220  /// Emit code for a single global function or var decl. Forward declarations
1221  /// are emitted lazily.
1222  void EmitGlobal(GlobalDecl D);
1223 
1224  bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D);
1225 
1226  llvm::GlobalValue *GetGlobalValue(StringRef Ref);
1227 
1228  /// Set attributes which are common to any form of a global definition (alias,
1229  /// Objective-C method, function, global variable).
1230  ///
1231  /// NOTE: This should only be called for definitions.
1232  void SetCommonAttributes(GlobalDecl GD, llvm::GlobalValue *GV);
1233 
1234  void addReplacement(StringRef Name, llvm::Constant *C);
1235 
1236  void addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C);
1237 
1238  /// Emit a code for threadprivate directive.
1239  /// \param D Threadprivate declaration.
1240  void EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D);
1241 
1242  /// Emit a code for declare reduction construct.
1243  void EmitOMPDeclareReduction(const OMPDeclareReductionDecl *D,
1244  CodeGenFunction *CGF = nullptr);
1245 
1246  /// Emit a code for requires directive.
1247  /// \param D Requires declaration
1248  void EmitOMPRequiresDecl(const OMPRequiresDecl *D);
1249 
1250  /// Returns whether the given record has hidden LTO visibility and therefore
1251  /// may participate in (single-module) CFI and whole-program vtable
1252  /// optimization.
1253  bool HasHiddenLTOVisibility(const CXXRecordDecl *RD);
1254 
1255  /// Emit type metadata for the given vtable using the given layout.
1256  void EmitVTableTypeMetadata(llvm::GlobalVariable *VTable,
1257  const VTableLayout &VTLayout);
1258 
1259  /// Generate a cross-DSO type identifier for MD.
1260  llvm::ConstantInt *CreateCrossDsoCfiTypeId(llvm::Metadata *MD);
1261 
1262  /// Create a metadata identifier for the given type. This may either be an
1263  /// MDString (for external identifiers) or a distinct unnamed MDNode (for
1264  /// internal identifiers).
1265  llvm::Metadata *CreateMetadataIdentifierForType(QualType T);
1266 
1267  /// Create a metadata identifier that is intended to be used to check virtual
1268  /// calls via a member function pointer.
1269  llvm::Metadata *CreateMetadataIdentifierForVirtualMemPtrType(QualType T);
1270 
1271  /// Create a metadata identifier for the generalization of the given type.
1272  /// This may either be an MDString (for external identifiers) or a distinct
1273  /// unnamed MDNode (for internal identifiers).
1274  llvm::Metadata *CreateMetadataIdentifierGeneralized(QualType T);
1275 
1276  /// Create and attach type metadata to the given function.
1277  void CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD,
1278  llvm::Function *F);
1279 
1280  /// Returns whether this module needs the "all-vtables" type identifier.
1281  bool NeedAllVtablesTypeId() const;
1282 
1283  /// Create and attach type metadata for the given vtable.
1284  void AddVTableTypeMetadata(llvm::GlobalVariable *VTable, CharUnits Offset,
1285  const CXXRecordDecl *RD);
1286 
1287  /// Return a vector of most-base classes for RD. This is used to implement
1288  /// control flow integrity checks for member function pointers.
1289  ///
1290  /// A most-base class of a class C is defined as a recursive base class of C,
1291  /// including C itself, that does not have any bases.
1292  std::vector<const CXXRecordDecl *>
1293  getMostBaseClasses(const CXXRecordDecl *RD);
1294 
1295  /// Get the declaration of std::terminate for the platform.
1296  llvm::Constant *getTerminateFn();
1297 
1298  llvm::SanitizerStatReport &getSanStats();
1299 
1300  llvm::Value *
1301  createOpenCLIntToSamplerConversion(const Expr *E, CodeGenFunction &CGF);
1302 
1303  /// Get target specific null pointer.
1304  /// \param T is the LLVM type of the null pointer.
1305  /// \param QT is the clang QualType of the null pointer.
1306  llvm::Constant *getNullPointer(llvm::PointerType *T, QualType QT);
1307 
1308 private:
1309  llvm::Constant *GetOrCreateLLVMFunction(
1310  StringRef MangledName, llvm::Type *Ty, GlobalDecl D, bool ForVTable,
1311  bool DontDefer = false, bool IsThunk = false,
1312  llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
1313  ForDefinition_t IsForDefinition = NotForDefinition);
1314 
1315  llvm::Constant *GetOrCreateMultiVersionResolver(GlobalDecl GD,
1316  llvm::Type *DeclTy,
1317  const FunctionDecl *FD);
1318  void UpdateMultiVersionNames(GlobalDecl GD, const FunctionDecl *FD);
1319 
1320  llvm::Constant *GetOrCreateLLVMGlobal(StringRef MangledName,
1321  llvm::PointerType *PTy,
1322  const VarDecl *D,
1323  ForDefinition_t IsForDefinition
1324  = NotForDefinition);
1325 
1326  bool GetCPUAndFeaturesAttributes(GlobalDecl GD,
1327  llvm::AttrBuilder &AttrBuilder);
1328  void setNonAliasAttributes(GlobalDecl GD, llvm::GlobalObject *GO);
1329 
1330  /// Set function attributes for a function declaration.
1331  void SetFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1332  bool IsIncompleteFunction, bool IsThunk);
1333 
1334  void EmitGlobalDefinition(GlobalDecl D, llvm::GlobalValue *GV = nullptr);
1335 
1336  void EmitGlobalFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1337  void EmitMultiVersionFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1338 
1339  void EmitGlobalVarDefinition(const VarDecl *D, bool IsTentative = false);
1340  void EmitAliasDefinition(GlobalDecl GD);
1341  void emitIFuncDefinition(GlobalDecl GD);
1342  void emitCPUDispatchDefinition(GlobalDecl GD);
1343  void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
1344  void EmitObjCIvarInitializations(ObjCImplementationDecl *D);
1345 
1346  // C++ related functions.
1347 
1348  void EmitDeclContext(const DeclContext *DC);
1349  void EmitLinkageSpec(const LinkageSpecDecl *D);
1350 
1351  /// Emit the function that initializes C++ thread_local variables.
1352  void EmitCXXThreadLocalInitFunc();
1353 
1354  /// Emit the function that initializes C++ globals.
1355  void EmitCXXGlobalInitFunc();
1356 
1357  /// Emit the function that destroys C++ globals.
1358  void EmitCXXGlobalDtorFunc();
1359 
1360  /// Emit the function that initializes the specified global (if PerformInit is
1361  /// true) and registers its destructor.
1362  void EmitCXXGlobalVarDeclInitFunc(const VarDecl *D,
1363  llvm::GlobalVariable *Addr,
1364  bool PerformInit);
1365 
1366  void EmitPointerToInitFunc(const VarDecl *VD, llvm::GlobalVariable *Addr,
1367  llvm::Function *InitFunc, InitSegAttr *ISA);
1368 
1369  // FIXME: Hardcoding priority here is gross.
1370  void AddGlobalCtor(llvm::Function *Ctor, int Priority = 65535,
1371  llvm::Constant *AssociatedData = nullptr);
1372  void AddGlobalDtor(llvm::Function *Dtor, int Priority = 65535);
1373 
1374  /// EmitCtorList - Generates a global array of functions and priorities using
1375  /// the given list and name. This array will have appending linkage and is
1376  /// suitable for use as a LLVM constructor or destructor array. Clears Fns.
1377  void EmitCtorList(CtorList &Fns, const char *GlobalName);
1378 
1379  /// Emit any needed decls for which code generation was deferred.
1380  void EmitDeferred();
1381 
1382  /// Try to emit external vtables as available_externally if they have emitted
1383  /// all inlined virtual functions. It runs after EmitDeferred() and therefore
1384  /// is not allowed to create new references to things that need to be emitted
1385  /// lazily.
1386  void EmitVTablesOpportunistically();
1387 
1388  /// Call replaceAllUsesWith on all pairs in Replacements.
1389  void applyReplacements();
1390 
1391  /// Call replaceAllUsesWith on all pairs in GlobalValReplacements.
1392  void applyGlobalValReplacements();
1393 
1394  void checkAliases();
1395 
1396  std::map<int, llvm::TinyPtrVector<llvm::Function *>> DtorsUsingAtExit;
1397 
1398  /// Register functions annotated with __attribute__((destructor)) using
1399  /// __cxa_atexit, if it is available, or atexit otherwise.
1400  void registerGlobalDtorsWithAtExit();
1401 
1402  void emitMultiVersionFunctions();
1403 
1404  /// Emit any vtables which we deferred and still have a use for.
1405  void EmitDeferredVTables();
1406 
1407  /// Emit a dummy function that reference a CoreFoundation symbol when
1408  /// @available is used on Darwin.
1409  void emitAtAvailableLinkGuard();
1410 
1411  /// Emit the llvm.used and llvm.compiler.used metadata.
1412  void emitLLVMUsed();
1413 
1414  /// Emit the link options introduced by imported modules.
1415  void EmitModuleLinkOptions();
1416 
1417  /// Emit aliases for internal-linkage declarations inside "C" language
1418  /// linkage specifications, giving them the "expected" name where possible.
1419  void EmitStaticExternCAliases();
1420 
1421  void EmitDeclMetadata();
1422 
1423  /// Emit the Clang version as llvm.ident metadata.
1424  void EmitVersionIdentMetadata();
1425 
1426  /// Emit the Clang commandline as llvm.commandline metadata.
1427  void EmitCommandLineMetadata();
1428 
1429  /// Emits target specific Metadata for global declarations.
1430  void EmitTargetMetadata();
1431 
1432  /// Emits OpenCL specific Metadata e.g. OpenCL version.
1433  void EmitOpenCLMetadata();
1434 
1435  /// Emit the llvm.gcov metadata used to tell LLVM where to emit the .gcno and
1436  /// .gcda files in a way that persists in .bc files.
1437  void EmitCoverageFile();
1438 
1439  /// Emits the initializer for a uuidof string.
1440  llvm::Constant *EmitUuidofInitializer(StringRef uuidstr);
1441 
1442  /// Determine whether the definition must be emitted; if this returns \c
1443  /// false, the definition can be emitted lazily if it's used.
1444  bool MustBeEmitted(const ValueDecl *D);
1445 
1446  /// Determine whether the definition can be emitted eagerly, or should be
1447  /// delayed until the end of the translation unit. This is relevant for
1448  /// definitions whose linkage can change, e.g. implicit function instantions
1449  /// which may later be explicitly instantiated.
1450  bool MayBeEmittedEagerly(const ValueDecl *D);
1451 
1452  /// Check whether we can use a "simpler", more core exceptions personality
1453  /// function.
1454  void SimplifyPersonality();
1455 
1456  /// Helper function for ConstructAttributeList and AddDefaultFnAttrs.
1457  /// Constructs an AttrList for a function with the given properties.
1458  void ConstructDefaultFnAttrList(StringRef Name, bool HasOptnone,
1459  bool AttrOnCallSite,
1460  llvm::AttrBuilder &FuncAttrs);
1461 
1462  llvm::Metadata *CreateMetadataIdentifierImpl(QualType T, MetadataTypeMap &Map,
1463  StringRef Suffix);
1464 };
1465 
1466 } // end namespace CodeGen
1467 } // end namespace clang
1468 
1469 #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:1737
bool operator==(const OrderGlobalInits &RHS) const
void setTypeDescriptorInMap(QualType Ty, llvm::Constant *C)
A (possibly-)qualified type.
Definition: Type.h:634
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:29
Stmt - This represents one statement.
Definition: Stmt.h:65
const llvm::Triple & getTriple() const
Returns the target triple of the primary target.
Definition: TargetInfo.h:948
Implements runtime-specific code generation functions.
Definition: CGObjCRuntime.h:63
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:86
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:1403
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:38
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:4155
static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V)
const CXXBaseSpecifier *const * path_const_iterator
Definition: Expr.h:3073
llvm::Constant * objc_allocWithZone
void objc_allocWithZone(id);
Represents a variable declaration or definition.
Definition: Decl.h:812
Objects with "hidden" visibility are not seen by the dynamic linker.
Definition: Visibility.h:36
CompoundLiteralExpr - [C99 6.5.2.5].
Definition: Expr.h:2931
CGDebugInfo * getModuleDebugInfo()
LangAS
Defines the address space values used by the address space qualifier of QualType. ...
Definition: AddressSpaces.h:25
This class gathers all debug information during compilation and is responsible for emitting to llvm g...
Definition: CGDebugInfo.h:53
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:23
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:154
llvm::Constant * objc_retainAutoreleasedReturnValue
id objc_retainAutoreleasedReturnValue(id);
int Category
Definition: Format.cpp:1631
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:49
Objects with "default" visibility are seen by the dynamic linker and act like normal objects...
Definition: Visibility.h:45
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:37
Structor(int Priority, llvm::Constant *Initializer, llvm::Constant *AssociatedData)
Visibility
Describes the different kinds of visibility that a declaration may have.
Definition: Visibility.h:33
void setStaticLocalDeclAddress(const VarDecl *D, llvm::Constant *C)
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:148
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:78
__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:2825
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:688
QuantityType getQuantity() const
getQuantity - Get the raw integer representation of this quantity.
Definition: CharUnits.h:178
This represents &#39;#pragma omp requires...&#39; directive.
Definition: DeclOpenMP.h:249
unsigned Offset
Definition: Format.cpp:1630
Exposes information about the current target.
Definition: TargetInfo.h:53
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:3857
Represent the declaration of a variable (in which case it is an lvalue) a function (in which case it ...
Definition: Decl.h:636
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:5183
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2705
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:41
void addMismatched(bool MainFile)
Record that a function we&#39;ve visited has mismatched profile data.
TBAAAccessInfo getTBAAInfo() const
Definition: CGValue.h:307
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:1902
const TargetInfo & getTarget() const
const LangOptions & getLangOpts() const
ASTContext & getContext() const
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:235
GlobalDecl - represents a global declaration.
Definition: GlobalDecl.h:34
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:102
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3063
llvm::Constant * objc_autoreleasePoolPush
void *objc_autoreleasePoolPush(void);
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2040
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:24
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:45
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:1261
int getUniqueBlockCount()
Fetches the global unique block count.
The basic abstraction for the target Objective-C runtime.
Definition: ObjCRuntime.h:27
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:3196
uint64_t SanitizerMask
Definition: Sanitizers.h:25
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2551
Implements C++ ABI-specific code generation functions.
Definition: CGCXXABI.h:43
ObjCEncodeExpr, used for @encode in Objective-C.
Definition: ExprObjC.h:379
This class organizes the cross-module state that is used while lowering AST types to LLVM types...
Definition: CodeGenTypes.h:118
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:82
Represents a C++ struct/union/class.
Definition: DeclCXX.h:299
A specialization of Address that requires the address to be an LLVM Constant.
Definition: Address.h:74
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:1572
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:73
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:166
This represents a decl that may have a name.
Definition: Decl.h:248
A Microsoft C++ __uuidof expression, which gets the _GUID that corresponds to the supplied type or ex...
Definition: ExprCXX.h:886
SanitizerMetadata * getSanitizerMetadata()
llvm::Constant * objc_retainAutoreleaseReturnValue
id objc_retainAutoreleaseReturnValue(id);
This represents &#39;#pragma omp threadprivate ...&#39; directive.
Definition: DeclOpenMP.h:39
Abstract information about a function or function prototype.
Definition: CGCall.h:44
const llvm::Triple & getTriple() const