clang  9.0.0svn
Sema.cpp
Go to the documentation of this file.
1 //===--- Sema.cpp - AST Builder and Semantic Analysis Implementation ------===//
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 file implements the actions class which performs semantic analysis and
10 // builds an AST out of a parse stream.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/DeclCXX.h"
17 #include "clang/AST/DeclFriend.h"
18 #include "clang/AST/DeclObjC.h"
19 #include "clang/AST/Expr.h"
20 #include "clang/AST/ExprCXX.h"
22 #include "clang/AST/StmtCXX.h"
25 #include "clang/Basic/TargetInfo.h"
26 #include "clang/Lex/HeaderSearch.h"
27 #include "clang/Lex/Preprocessor.h"
34 #include "clang/Sema/Scope.h"
35 #include "clang/Sema/ScopeInfo.h"
40 #include "llvm/ADT/DenseMap.h"
41 #include "llvm/ADT/SmallSet.h"
42 #include "llvm/Support/TimeProfiler.h"
43 
44 using namespace clang;
45 using namespace sema;
46 
48  return Lexer::getLocForEndOfToken(Loc, Offset, SourceMgr, LangOpts);
49 }
50 
51 ModuleLoader &Sema::getModuleLoader() const { return PP.getModuleLoader(); }
52 
54  const Preprocessor &PP) {
55  PrintingPolicy Policy = Context.getPrintingPolicy();
56  // In diagnostics, we print _Bool as bool if the latter is defined as the
57  // former.
58  Policy.Bool = Context.getLangOpts().Bool;
59  if (!Policy.Bool) {
60  if (const MacroInfo *BoolMacro = PP.getMacroInfo(Context.getBoolName())) {
61  Policy.Bool = BoolMacro->isObjectLike() &&
62  BoolMacro->getNumTokens() == 1 &&
63  BoolMacro->getReplacementToken(0).is(tok::kw__Bool);
64  }
65  }
66 
67  return Policy;
68 }
69 
71  TUScope = S;
72  PushDeclContext(S, Context.getTranslationUnitDecl());
73 }
74 
75 namespace clang {
76 namespace sema {
77 
78 class SemaPPCallbacks : public PPCallbacks {
79  Sema *S = nullptr;
81 
82 public:
83  void set(Sema &S) { this->S = &S; }
84 
85  void reset() { S = nullptr; }
86 
87  virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason,
89  FileID PrevFID) override {
90  if (!S)
91  return;
92  switch (Reason) {
93  case EnterFile: {
95  SourceLocation IncludeLoc = SM.getIncludeLoc(SM.getFileID(Loc));
96  if (IncludeLoc.isValid()) {
97  if (llvm::timeTraceProfilerEnabled()) {
98  const FileEntry *FE = SM.getFileEntryForID(SM.getFileID(Loc));
99  llvm::timeTraceProfilerBegin(
100  "Source", FE != nullptr ? FE->getName() : StringRef("<unknown>"));
101  }
102 
103  IncludeStack.push_back(IncludeLoc);
106  }
107  break;
108  }
109  case ExitFile:
110  if (!IncludeStack.empty()) {
111  if (llvm::timeTraceProfilerEnabled())
112  llvm::timeTraceProfilerEnd();
113 
116  IncludeStack.pop_back_val());
117  }
118  break;
119  default:
120  break;
121  }
122  }
123 };
124 
125 } // end namespace sema
126 } // end namespace clang
127 
128 Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
129  TranslationUnitKind TUKind, CodeCompleteConsumer *CodeCompleter)
130  : ExternalSource(nullptr), isMultiplexExternalSource(false),
131  FPFeatures(pp.getLangOpts()), LangOpts(pp.getLangOpts()), PP(pp),
132  Context(ctxt), Consumer(consumer), Diags(PP.getDiagnostics()),
133  SourceMgr(PP.getSourceManager()), CollectStats(false),
134  CodeCompleter(CodeCompleter), CurContext(nullptr),
135  OriginalLexicalContext(nullptr), MSStructPragmaOn(false),
136  MSPointerToMemberRepresentationMethod(
137  LangOpts.getMSPointerToMemberRepresentationMethod()),
138  VtorDispStack(MSVtorDispAttr::Mode(LangOpts.VtorDispMode)), PackStack(0),
139  DataSegStack(nullptr), BSSSegStack(nullptr), ConstSegStack(nullptr),
140  CodeSegStack(nullptr), CurInitSeg(nullptr), VisContext(nullptr),
141  PragmaAttributeCurrentTargetDecl(nullptr),
142  IsBuildingRecoveryCallExpr(false), Cleanup{}, LateTemplateParser(nullptr),
143  LateTemplateParserCleanup(nullptr), OpaqueParser(nullptr), IdResolver(pp),
145  StdCoroutineTraitsCache(nullptr), CXXTypeInfoDecl(nullptr),
146  MSVCGuidDecl(nullptr), NSNumberDecl(nullptr), NSValueDecl(nullptr),
147  NSStringDecl(nullptr), StringWithUTF8StringMethod(nullptr),
148  ValueWithBytesObjCTypeMethod(nullptr), NSArrayDecl(nullptr),
149  ArrayWithObjectsMethod(nullptr), NSDictionaryDecl(nullptr),
152  FullyCheckedComparisonCategories(
153  static_cast<unsigned>(ComparisonCategoryType::Last) + 1),
157  TyposCorrected(0), AnalysisWarnings(*this),
158  ThreadSafetyDeclCache(nullptr), VarDataSharingAttributesStack(nullptr),
159  CurScope(nullptr), Ident_super(nullptr), Ident___float128(nullptr) {
160  TUScope = nullptr;
161 
162  LoadedExternalKnownNamespaces = false;
163  for (unsigned I = 0; I != NSAPI::NumNSNumberLiteralMethods; ++I)
164  NSNumberLiteralMethods[I] = nullptr;
165 
166  if (getLangOpts().ObjC)
167  NSAPIObj.reset(new NSAPI(Context));
168 
169  if (getLangOpts().CPlusPlus)
170  FieldCollector.reset(new CXXFieldCollector());
171 
172  // Tell diagnostics how to render things from the AST library.
174 
175  ExprEvalContexts.emplace_back(
178 
180 
181  // Initialization of data sharing attributes stack for OpenMP
182  InitDataSharingAttributesStack();
183 
184  std::unique_ptr<sema::SemaPPCallbacks> Callbacks =
185  llvm::make_unique<sema::SemaPPCallbacks>();
186  SemaPPCallbackHandler = Callbacks.get();
187  PP.addPPCallbacks(std::move(Callbacks));
188  SemaPPCallbackHandler->set(*this);
189 }
190 
191 void Sema::addImplicitTypedef(StringRef Name, QualType T) {
192  DeclarationName DN = &Context.Idents.get(Name);
193  if (IdResolver.begin(DN) == IdResolver.end())
195 }
196 
198  if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer))
199  SC->InitializeSema(*this);
200 
201  // Tell the external Sema source about this Sema object.
202  if (ExternalSemaSource *ExternalSema
203  = dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource()))
204  ExternalSema->InitializeSema(*this);
205 
206  // This needs to happen after ExternalSemaSource::InitializeSema(this) or we
207  // will not be able to merge any duplicate __va_list_tag decls correctly.
208  VAListTagName = PP.getIdentifierInfo("__va_list_tag");
209 
210  if (!TUScope)
211  return;
212 
213  // Initialize predefined 128-bit integer types, if needed.
215  // If either of the 128-bit integer types are unavailable to name lookup,
216  // define them now.
217  DeclarationName Int128 = &Context.Idents.get("__int128_t");
218  if (IdResolver.begin(Int128) == IdResolver.end())
220 
221  DeclarationName UInt128 = &Context.Idents.get("__uint128_t");
222  if (IdResolver.begin(UInt128) == IdResolver.end())
224  }
225 
226 
227  // Initialize predefined Objective-C types:
228  if (getLangOpts().ObjC) {
229  // If 'SEL' does not yet refer to any declarations, make it refer to the
230  // predefined 'SEL'.
231  DeclarationName SEL = &Context.Idents.get("SEL");
232  if (IdResolver.begin(SEL) == IdResolver.end())
234 
235  // If 'id' does not yet refer to any declarations, make it refer to the
236  // predefined 'id'.
238  if (IdResolver.begin(Id) == IdResolver.end())
240 
241  // Create the built-in typedef for 'Class'.
242  DeclarationName Class = &Context.Idents.get("Class");
243  if (IdResolver.begin(Class) == IdResolver.end())
245 
246  // Create the built-in forward declaratino for 'Protocol'.
247  DeclarationName Protocol = &Context.Idents.get("Protocol");
248  if (IdResolver.begin(Protocol) == IdResolver.end())
250  }
251 
252  // Create the internal type for the *StringMakeConstantString builtins.
253  DeclarationName ConstantString = &Context.Idents.get("__NSConstantString");
254  if (IdResolver.begin(ConstantString) == IdResolver.end())
256 
257  // Initialize Microsoft "predefined C++ types".
258  if (getLangOpts().MSVCCompat) {
259  if (getLangOpts().CPlusPlus &&
260  IdResolver.begin(&Context.Idents.get("type_info")) == IdResolver.end())
262  TUScope);
263 
265  }
266 
267  // Initialize predefined OpenCL types and supported extensions and (optional)
268  // core features.
269  if (getLangOpts().OpenCL) {
275  if (getLangOpts().OpenCLCPlusPlus || getLangOpts().OpenCLVersion >= 200) {
276  addImplicitTypedef("clk_event_t", Context.OCLClkEventTy);
278  addImplicitTypedef("reserve_id_t", Context.OCLReserveIDTy);
280  addImplicitTypedef("atomic_uint",
282  auto AtomicLongT = Context.getAtomicType(Context.LongTy);
283  addImplicitTypedef("atomic_long", AtomicLongT);
284  auto AtomicULongT = Context.getAtomicType(Context.UnsignedLongTy);
285  addImplicitTypedef("atomic_ulong", AtomicULongT);
286  addImplicitTypedef("atomic_float",
288  auto AtomicDoubleT = Context.getAtomicType(Context.DoubleTy);
289  addImplicitTypedef("atomic_double", AtomicDoubleT);
290  // OpenCLC v2.0, s6.13.11.6 requires that atomic_flag is implemented as
291  // 32-bit integer and OpenCLC v2.0, s6.1.1 int is always 32-bit wide.
293  auto AtomicIntPtrT = Context.getAtomicType(Context.getIntPtrType());
294  addImplicitTypedef("atomic_intptr_t", AtomicIntPtrT);
295  auto AtomicUIntPtrT = Context.getAtomicType(Context.getUIntPtrType());
296  addImplicitTypedef("atomic_uintptr_t", AtomicUIntPtrT);
297  auto AtomicSizeT = Context.getAtomicType(Context.getSizeType());
298  addImplicitTypedef("atomic_size_t", AtomicSizeT);
299  auto AtomicPtrDiffT = Context.getAtomicType(Context.getPointerDiffType());
300  addImplicitTypedef("atomic_ptrdiff_t", AtomicPtrDiffT);
301 
302  // OpenCL v2.0 s6.13.11.6:
303  // - The atomic_long and atomic_ulong types are supported if the
304  // cl_khr_int64_base_atomics and cl_khr_int64_extended_atomics
305  // extensions are supported.
306  // - The atomic_double type is only supported if double precision
307  // is supported and the cl_khr_int64_base_atomics and
308  // cl_khr_int64_extended_atomics extensions are supported.
309  // - If the device address space is 64-bits, the data types
310  // atomic_intptr_t, atomic_uintptr_t, atomic_size_t and
311  // atomic_ptrdiff_t are supported if the cl_khr_int64_base_atomics and
312  // cl_khr_int64_extended_atomics extensions are supported.
313  std::vector<QualType> Atomic64BitTypes;
314  Atomic64BitTypes.push_back(AtomicLongT);
315  Atomic64BitTypes.push_back(AtomicULongT);
316  Atomic64BitTypes.push_back(AtomicDoubleT);
317  if (Context.getTypeSize(AtomicSizeT) == 64) {
318  Atomic64BitTypes.push_back(AtomicSizeT);
319  Atomic64BitTypes.push_back(AtomicIntPtrT);
320  Atomic64BitTypes.push_back(AtomicUIntPtrT);
321  Atomic64BitTypes.push_back(AtomicPtrDiffT);
322  }
323  for (auto &I : Atomic64BitTypes)
325  "cl_khr_int64_base_atomics cl_khr_int64_extended_atomics");
326 
327  setOpenCLExtensionForType(AtomicDoubleT, "cl_khr_fp64");
328  }
329 
331 
332 #define GENERIC_IMAGE_TYPE_EXT(Type, Id, Ext) \
333  setOpenCLExtensionForType(Context.Id, Ext);
334 #include "clang/Basic/OpenCLImageTypes.def"
335 #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
336  addImplicitTypedef(#ExtType, Context.Id##Ty); \
337  setOpenCLExtensionForType(Context.Id##Ty, #Ext);
338 #include "clang/Basic/OpenCLExtensionTypes.def"
339  };
340 
342  DeclarationName MSVaList = &Context.Idents.get("__builtin_ms_va_list");
343  if (IdResolver.begin(MSVaList) == IdResolver.end())
345  }
346 
347  DeclarationName BuiltinVaList = &Context.Idents.get("__builtin_va_list");
348  if (IdResolver.begin(BuiltinVaList) == IdResolver.end())
350 }
351 
353  if (VisContext) FreeVisContext();
354 
355  // Kill all the active scopes.
357  if (FSI != PreallocatedFunctionScope.get())
358  delete FSI;
359 
360  // Tell the SemaConsumer to forget about us; we're going out of scope.
361  if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer))
362  SC->ForgetSema();
363 
364  // Detach from the external Sema source.
365  if (ExternalSemaSource *ExternalSema
366  = dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource()))
367  ExternalSema->ForgetSema();
368 
369  // If Sema's ExternalSource is the multiplexer - we own it.
370  if (isMultiplexExternalSource)
371  delete ExternalSource;
372 
374 
375  // Destroys data sharing attributes stack for OpenMP
376  DestroyDataSharingAttributesStack();
377 
378  // Detach from the PP callback handler which outlives Sema since it's owned
379  // by the preprocessor.
380  SemaPPCallbackHandler->reset();
381 
382  assert(DelayedTypos.empty() && "Uncorrected typos!");
383 }
384 
385 /// makeUnavailableInSystemHeader - There is an error in the current
386 /// context. If we're still in a system header, and we can plausibly
387 /// make the relevant declaration unavailable instead of erroring, do
388 /// so and return true.
390  UnavailableAttr::ImplicitReason reason) {
391  // If we're not in a function, it's an error.
392  FunctionDecl *fn = dyn_cast<FunctionDecl>(CurContext);
393  if (!fn) return false;
394 
395  // If we're in template instantiation, it's an error.
397  return false;
398 
399  // If that function's not in a system header, it's an error.
401  return false;
402 
403  // If the function is already unavailable, it's not an error.
404  if (fn->hasAttr<UnavailableAttr>()) return true;
405 
406  fn->addAttr(UnavailableAttr::CreateImplicit(Context, "", reason, loc));
407  return true;
408 }
409 
412 }
413 
414 ///Registers an external source. If an external source already exists,
415 /// creates a multiplex external source and appends to it.
416 ///
417 ///\param[in] E - A non-null external sema source.
418 ///
420  assert(E && "Cannot use with NULL ptr");
421 
422  if (!ExternalSource) {
423  ExternalSource = E;
424  return;
425  }
426 
427  if (isMultiplexExternalSource)
428  static_cast<MultiplexExternalSemaSource*>(ExternalSource)->addSource(*E);
429  else {
430  ExternalSource = new MultiplexExternalSemaSource(*ExternalSource, *E);
431  isMultiplexExternalSource = true;
432  }
433 }
434 
435 /// Print out statistics about the semantic analysis.
436 void Sema::PrintStats() const {
437  llvm::errs() << "\n*** Semantic Analysis Stats:\n";
438  llvm::errs() << NumSFINAEErrors << " SFINAE diagnostics trapped.\n";
439 
440  BumpAlloc.PrintStats();
442 }
443 
445  QualType SrcType,
446  SourceLocation Loc) {
447  Optional<NullabilityKind> ExprNullability = SrcType->getNullability(Context);
448  if (!ExprNullability || *ExprNullability != NullabilityKind::Nullable)
449  return;
450 
451  Optional<NullabilityKind> TypeNullability = DstType->getNullability(Context);
452  if (!TypeNullability || *TypeNullability != NullabilityKind::NonNull)
453  return;
454 
455  Diag(Loc, diag::warn_nullability_lost) << SrcType << DstType;
456 }
457 
459  if (Diags.isIgnored(diag::warn_zero_as_null_pointer_constant,
460  E->getBeginLoc()))
461  return;
462  // nullptr only exists from C++11 on, so don't warn on its absence earlier.
463  if (!getLangOpts().CPlusPlus11)
464  return;
465 
466  if (Kind != CK_NullToPointer && Kind != CK_NullToMemberPointer)
467  return;
469  return;
470 
471  // If it is a macro from system header, and if the macro name is not "NULL",
472  // do not warn.
473  SourceLocation MaybeMacroLoc = E->getBeginLoc();
475  SourceMgr.isInSystemMacro(MaybeMacroLoc) &&
476  !findMacroSpelling(MaybeMacroLoc, "NULL"))
477  return;
478 
479  Diag(E->getBeginLoc(), diag::warn_zero_as_null_pointer_constant)
480  << FixItHint::CreateReplacement(E->getSourceRange(), "nullptr");
481 }
482 
483 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit cast.
484 /// If there is already an implicit cast, merge into the existing one.
485 /// The result is of the given category.
488  const CXXCastPath *BasePath,
489  CheckedConversionKind CCK) {
490 #ifndef NDEBUG
491  if (VK == VK_RValue && !E->isRValue()) {
492  switch (Kind) {
493  default:
494  llvm_unreachable("can't implicitly cast lvalue to rvalue with this cast "
495  "kind");
496  case CK_LValueToRValue:
497  case CK_ArrayToPointerDecay:
498  case CK_FunctionToPointerDecay:
499  case CK_ToVoid:
500  case CK_NonAtomicToAtomic:
501  break;
502  }
503  }
504  assert((VK == VK_RValue || !E->isRValue()) && "can't cast rvalue to lvalue");
505 #endif
506 
509 
510  QualType ExprTy = Context.getCanonicalType(E->getType());
512 
513  if (ExprTy == TypeTy)
514  return E;
515 
516  // C++1z [conv.array]: The temporary materialization conversion is applied.
517  // We also use this to fuel C++ DR1213, which applies to C++11 onwards.
518  if (Kind == CK_ArrayToPointerDecay && getLangOpts().CPlusPlus &&
519  E->getValueKind() == VK_RValue) {
520  // The temporary is an lvalue in C++98 and an xvalue otherwise.
522  E->getType(), E, !getLangOpts().CPlusPlus11);
523  if (Materialized.isInvalid())
524  return ExprError();
525  E = Materialized.get();
526  }
527 
528  if (ImplicitCastExpr *ImpCast = dyn_cast<ImplicitCastExpr>(E)) {
529  if (ImpCast->getCastKind() == Kind && (!BasePath || BasePath->empty())) {
530  ImpCast->setType(Ty);
531  ImpCast->setValueKind(VK);
532  return E;
533  }
534  }
535 
536  return ImplicitCastExpr::Create(Context, Ty, Kind, E, BasePath, VK);
537 }
538 
539 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding
540 /// to the conversion from scalar type ScalarTy to the Boolean type.
542  switch (ScalarTy->getScalarTypeKind()) {
543  case Type::STK_Bool: return CK_NoOp;
544  case Type::STK_CPointer: return CK_PointerToBoolean;
545  case Type::STK_BlockPointer: return CK_PointerToBoolean;
546  case Type::STK_ObjCObjectPointer: return CK_PointerToBoolean;
547  case Type::STK_MemberPointer: return CK_MemberPointerToBoolean;
548  case Type::STK_Integral: return CK_IntegralToBoolean;
549  case Type::STK_Floating: return CK_FloatingToBoolean;
550  case Type::STK_IntegralComplex: return CK_IntegralComplexToBoolean;
551  case Type::STK_FloatingComplex: return CK_FloatingComplexToBoolean;
552  case Type::STK_FixedPoint: return CK_FixedPointToBoolean;
553  }
554  llvm_unreachable("unknown scalar type kind");
555 }
556 
557 /// Used to prune the decls of Sema's UnusedFileScopedDecls vector.
558 static bool ShouldRemoveFromUnused(Sema *SemaRef, const DeclaratorDecl *D) {
559  if (D->getMostRecentDecl()->isUsed())
560  return true;
561 
562  if (D->isExternallyVisible())
563  return true;
564 
565  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
566  // If this is a function template and none of its specializations is used,
567  // we should warn.
568  if (FunctionTemplateDecl *Template = FD->getDescribedFunctionTemplate())
569  for (const auto *Spec : Template->specializations())
570  if (ShouldRemoveFromUnused(SemaRef, Spec))
571  return true;
572 
573  // UnusedFileScopedDecls stores the first declaration.
574  // The declaration may have become definition so check again.
575  const FunctionDecl *DeclToCheck;
576  if (FD->hasBody(DeclToCheck))
577  return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
578 
579  // Later redecls may add new information resulting in not having to warn,
580  // so check again.
581  DeclToCheck = FD->getMostRecentDecl();
582  if (DeclToCheck != FD)
583  return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
584  }
585 
586  if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
587  // If a variable usable in constant expressions is referenced,
588  // don't warn if it isn't used: if the value of a variable is required
589  // for the computation of a constant expression, it doesn't make sense to
590  // warn even if the variable isn't odr-used. (isReferenced doesn't
591  // precisely reflect that, but it's a decent approximation.)
592  if (VD->isReferenced() &&
593  VD->isUsableInConstantExpressions(SemaRef->Context))
594  return true;
595 
596  if (VarTemplateDecl *Template = VD->getDescribedVarTemplate())
597  // If this is a variable template and none of its specializations is used,
598  // we should warn.
599  for (const auto *Spec : Template->specializations())
600  if (ShouldRemoveFromUnused(SemaRef, Spec))
601  return true;
602 
603  // UnusedFileScopedDecls stores the first declaration.
604  // The declaration may have become definition so check again.
605  const VarDecl *DeclToCheck = VD->getDefinition();
606  if (DeclToCheck)
607  return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
608 
609  // Later redecls may add new information resulting in not having to warn,
610  // so check again.
611  DeclToCheck = VD->getMostRecentDecl();
612  if (DeclToCheck != VD)
613  return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
614  }
615 
616  return false;
617 }
618 
620  if (auto *FD = dyn_cast<FunctionDecl>(ND))
621  return FD->isExternC();
622  return cast<VarDecl>(ND)->isExternC();
623 }
624 
625 /// Determine whether ND is an external-linkage function or variable whose
626 /// type has no linkage.
628  // Note: it's not quite enough to check whether VD has UniqueExternalLinkage,
629  // because we also want to catch the case where its type has VisibleNoLinkage,
630  // which does not affect the linkage of VD.
631  return getLangOpts().CPlusPlus && VD->hasExternalFormalLinkage() &&
634 }
635 
636 /// Obtains a sorted list of functions and variables that are undefined but
637 /// ODR-used.
639  SmallVectorImpl<std::pair<NamedDecl *, SourceLocation> > &Undefined) {
640  for (const auto &UndefinedUse : UndefinedButUsed) {
641  NamedDecl *ND = UndefinedUse.first;
642 
643  // Ignore attributes that have become invalid.
644  if (ND->isInvalidDecl()) continue;
645 
646  // __attribute__((weakref)) is basically a definition.
647  if (ND->hasAttr<WeakRefAttr>()) continue;
648 
649  if (isa<CXXDeductionGuideDecl>(ND))
650  continue;
651 
652  if (ND->hasAttr<DLLImportAttr>() || ND->hasAttr<DLLExportAttr>()) {
653  // An exported function will always be emitted when defined, so even if
654  // the function is inline, it doesn't have to be emitted in this TU. An
655  // imported function implies that it has been exported somewhere else.
656  continue;
657  }
658 
659  if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
660  if (FD->isDefined())
661  continue;
662  if (FD->isExternallyVisible() &&
664  !FD->getMostRecentDecl()->isInlined() &&
665  !FD->hasAttr<ExcludeFromExplicitInstantiationAttr>())
666  continue;
667  if (FD->getBuiltinID())
668  continue;
669  } else {
670  auto *VD = cast<VarDecl>(ND);
671  if (VD->hasDefinition() != VarDecl::DeclarationOnly)
672  continue;
673  if (VD->isExternallyVisible() &&
675  !VD->getMostRecentDecl()->isInline() &&
676  !VD->hasAttr<ExcludeFromExplicitInstantiationAttr>())
677  continue;
678 
679  // Skip VarDecls that lack formal definitions but which we know are in
680  // fact defined somewhere.
681  if (VD->isKnownToBeDefined())
682  continue;
683  }
684 
685  Undefined.push_back(std::make_pair(ND, UndefinedUse.second));
686  }
687 }
688 
689 /// checkUndefinedButUsed - Check for undefined objects with internal linkage
690 /// or that are inline.
691 static void checkUndefinedButUsed(Sema &S) {
692  if (S.UndefinedButUsed.empty()) return;
693 
694  // Collect all the still-undefined entities with internal linkage.
696  S.getUndefinedButUsed(Undefined);
697  if (Undefined.empty()) return;
698 
699  for (auto Undef : Undefined) {
700  ValueDecl *VD = cast<ValueDecl>(Undef.first);
701  SourceLocation UseLoc = Undef.second;
702 
703  if (S.isExternalWithNoLinkageType(VD)) {
704  // C++ [basic.link]p8:
705  // A type without linkage shall not be used as the type of a variable
706  // or function with external linkage unless
707  // -- the entity has C language linkage
708  // -- the entity is not odr-used or is defined in the same TU
709  //
710  // As an extension, accept this in cases where the type is externally
711  // visible, since the function or variable actually can be defined in
712  // another translation unit in that case.
714  ? diag::ext_undefined_internal_type
715  : diag::err_undefined_internal_type)
716  << isa<VarDecl>(VD) << VD;
717  } else if (!VD->isExternallyVisible()) {
718  // FIXME: We can promote this to an error. The function or variable can't
719  // be defined anywhere else, so the program must necessarily violate the
720  // one definition rule.
721  S.Diag(VD->getLocation(), diag::warn_undefined_internal)
722  << isa<VarDecl>(VD) << VD;
723  } else if (auto *FD = dyn_cast<FunctionDecl>(VD)) {
724  (void)FD;
725  assert(FD->getMostRecentDecl()->isInlined() &&
726  "used object requires definition but isn't inline or internal?");
727  // FIXME: This is ill-formed; we should reject.
728  S.Diag(VD->getLocation(), diag::warn_undefined_inline) << VD;
729  } else {
730  assert(cast<VarDecl>(VD)->getMostRecentDecl()->isInline() &&
731  "used var requires definition but isn't inline or internal?");
732  S.Diag(VD->getLocation(), diag::err_undefined_inline_var) << VD;
733  }
734  if (UseLoc.isValid())
735  S.Diag(UseLoc, diag::note_used_here);
736  }
737 
738  S.UndefinedButUsed.clear();
739 }
740 
742  if (!ExternalSource)
743  return;
744 
746  ExternalSource->ReadWeakUndeclaredIdentifiers(WeakIDs);
747  for (auto &WeakID : WeakIDs)
748  WeakUndeclaredIdentifiers.insert(WeakID);
749 }
750 
751 
752 typedef llvm::DenseMap<const CXXRecordDecl*, bool> RecordCompleteMap;
753 
754 /// Returns true, if all methods and nested classes of the given
755 /// CXXRecordDecl are defined in this translation unit.
756 ///
757 /// Should only be called from ActOnEndOfTranslationUnit so that all
758 /// definitions are actually read.
760  RecordCompleteMap &MNCComplete) {
761  RecordCompleteMap::iterator Cache = MNCComplete.find(RD);
762  if (Cache != MNCComplete.end())
763  return Cache->second;
764  if (!RD->isCompleteDefinition())
765  return false;
766  bool Complete = true;
768  E = RD->decls_end();
769  I != E && Complete; ++I) {
770  if (const CXXMethodDecl *M = dyn_cast<CXXMethodDecl>(*I))
771  Complete = M->isDefined() || M->isDefaulted() ||
772  (M->isPure() && !isa<CXXDestructorDecl>(M));
773  else if (const FunctionTemplateDecl *F = dyn_cast<FunctionTemplateDecl>(*I))
774  // If the template function is marked as late template parsed at this
775  // point, it has not been instantiated and therefore we have not
776  // performed semantic analysis on it yet, so we cannot know if the type
777  // can be considered complete.
778  Complete = !F->getTemplatedDecl()->isLateTemplateParsed() &&
779  F->getTemplatedDecl()->isDefined();
780  else if (const CXXRecordDecl *R = dyn_cast<CXXRecordDecl>(*I)) {
781  if (R->isInjectedClassName())
782  continue;
783  if (R->hasDefinition())
784  Complete = MethodsAndNestedClassesComplete(R->getDefinition(),
785  MNCComplete);
786  else
787  Complete = false;
788  }
789  }
790  MNCComplete[RD] = Complete;
791  return Complete;
792 }
793 
794 /// Returns true, if the given CXXRecordDecl is fully defined in this
795 /// translation unit, i.e. all methods are defined or pure virtual and all
796 /// friends, friend functions and nested classes are fully defined in this
797 /// translation unit.
798 ///
799 /// Should only be called from ActOnEndOfTranslationUnit so that all
800 /// definitions are actually read.
801 static bool IsRecordFullyDefined(const CXXRecordDecl *RD,
802  RecordCompleteMap &RecordsComplete,
803  RecordCompleteMap &MNCComplete) {
804  RecordCompleteMap::iterator Cache = RecordsComplete.find(RD);
805  if (Cache != RecordsComplete.end())
806  return Cache->second;
807  bool Complete = MethodsAndNestedClassesComplete(RD, MNCComplete);
809  E = RD->friend_end();
810  I != E && Complete; ++I) {
811  // Check if friend classes and methods are complete.
812  if (TypeSourceInfo *TSI = (*I)->getFriendType()) {
813  // Friend classes are available as the TypeSourceInfo of the FriendDecl.
814  if (CXXRecordDecl *FriendD = TSI->getType()->getAsCXXRecordDecl())
815  Complete = MethodsAndNestedClassesComplete(FriendD, MNCComplete);
816  else
817  Complete = false;
818  } else {
819  // Friend functions are available through the NamedDecl of FriendDecl.
820  if (const FunctionDecl *FD =
821  dyn_cast<FunctionDecl>((*I)->getFriendDecl()))
822  Complete = FD->isDefined();
823  else
824  // This is a template friend, give up.
825  Complete = false;
826  }
827  }
828  RecordsComplete[RD] = Complete;
829  return Complete;
830 }
831 
833  if (ExternalSource)
834  ExternalSource->ReadUnusedLocalTypedefNameCandidates(
837  if (TD->isReferenced())
838  continue;
839  Diag(TD->getLocation(), diag::warn_unused_local_typedef)
840  << isa<TypeAliasDecl>(TD) << TD->getDeclName();
841  }
842  UnusedLocalTypedefNameCandidates.clear();
843 }
844 
845 /// This is called before the very first declaration in the translation unit
846 /// is parsed. Note that the ASTContext may have already injected some
847 /// declarations.
849  if (getLangOpts().ModulesTS &&
850  (getLangOpts().getCompilingModule() == LangOptions::CMK_ModuleInterface ||
851  getLangOpts().getCompilingModule() == LangOptions::CMK_None)) {
852  // We start in an implied global module fragment.
853  SourceLocation StartOfTU =
856  ModuleScopes.back().ImplicitGlobalModuleFragment = true;
857  }
858 }
859 
861  // No explicit actions are required at the end of the global module fragment.
862  if (Kind == TUFragmentKind::Global)
863  return;
864 
865  // Transfer late parsed template instantiations over to the pending template
866  // instantiation list. During normal compilation, the late template parser
867  // will be installed and instantiating these templates will succeed.
868  //
869  // If we are building a TU prefix for serialization, it is also safe to
870  // transfer these over, even though they are not parsed. The end of the TU
871  // should be outside of any eager template instantiation scope, so when this
872  // AST is deserialized, these templates will not be parsed until the end of
873  // the combined TU.
875  LateParsedInstantiations.begin(),
877  LateParsedInstantiations.clear();
878 
879  // If DefinedUsedVTables ends up marking any virtual member functions it
880  // might lead to more pending template instantiations, which we then need
881  // to instantiate.
883 
884  // C++: Perform implicit template instantiations.
885  //
886  // FIXME: When we perform these implicit instantiations, we do not
887  // carefully keep track of the point of instantiation (C++ [temp.point]).
888  // This means that name lookup that occurs within the template
889  // instantiation will always happen at the end of the translation unit,
890  // so it will find some names that are not required to be found. This is
891  // valid, but we could do better by diagnosing if an instantiation uses a
892  // name that was not visible at its first point of instantiation.
893  if (ExternalSource) {
894  // Load pending instantiations from the external source.
896  ExternalSource->ReadPendingInstantiations(Pending);
897  for (auto PII : Pending)
898  if (auto Func = dyn_cast<FunctionDecl>(PII.first))
899  Func->setInstantiationIsPending(true);
901  Pending.begin(), Pending.end());
902  }
903 
904  {
905  llvm::TimeTraceScope TimeScope("PerformPendingInstantiations",
906  StringRef(""));
908  }
909 
910  assert(LateParsedInstantiations.empty() &&
911  "end of TU template instantiation should not create more "
912  "late-parsed templates");
913 }
914 
915 /// ActOnEndOfTranslationUnit - This is called at the very end of the
916 /// translation unit when EOF is reached and all but the top-level scope is
917 /// popped.
919  assert(DelayedDiagnostics.getCurrentPool() == nullptr
920  && "reached end of translation unit with a pool attached?");
921 
922  // If code completion is enabled, don't perform any end-of-translation-unit
923  // work.
925  return;
926 
927  // Complete translation units and modules define vtables and perform implicit
928  // instantiations. PCH files do not.
929  if (TUKind != TU_Prefix) {
931 
933  !ModuleScopes.empty() && ModuleScopes.back().Module->Kind ==
935  ? TUFragmentKind::Private
936  : TUFragmentKind::Normal);
937 
940 
942  } else {
943  // If we are building a TU prefix for serialization, it is safe to transfer
944  // these over, even though they are not parsed. The end of the TU should be
945  // outside of any eager template instantiation scope, so when this AST is
946  // deserialized, these templates will not be parsed until the end of the
947  // combined TU.
949  LateParsedInstantiations.begin(),
951  LateParsedInstantiations.clear();
952  }
953 
956 
957  // All delayed member exception specs should be checked or we end up accepting
958  // incompatible declarations.
959  assert(DelayedOverridingExceptionSpecChecks.empty());
960  assert(DelayedEquivalentExceptionSpecChecks.empty());
961  assert(DelayedDefaultedMemberExceptionSpecs.empty());
962 
963  // All dllexport classes should have been processed already.
964  assert(DelayedDllExportClasses.empty());
965 
966  // Remove file scoped decls that turned out to be used.
968  std::remove_if(UnusedFileScopedDecls.begin(nullptr, true),
970  [this](const DeclaratorDecl *DD) {
971  return ShouldRemoveFromUnused(this, DD);
972  }),
974 
975  if (TUKind == TU_Prefix) {
976  // Translation unit prefixes don't need any of the checking below.
978  TUScope = nullptr;
979  return;
980  }
981 
982  // Check for #pragma weak identifiers that were never declared
984  for (auto WeakID : WeakUndeclaredIdentifiers) {
985  if (WeakID.second.getUsed())
986  continue;
987 
988  Decl *PrevDecl = LookupSingleName(TUScope, WeakID.first, SourceLocation(),
990  if (PrevDecl != nullptr &&
991  !(isa<FunctionDecl>(PrevDecl) || isa<VarDecl>(PrevDecl)))
992  Diag(WeakID.second.getLocation(), diag::warn_attribute_wrong_decl_type)
993  << "'weak'" << ExpectedVariableOrFunction;
994  else
995  Diag(WeakID.second.getLocation(), diag::warn_weak_identifier_undeclared)
996  << WeakID.first;
997  }
998 
999  if (LangOpts.CPlusPlus11 &&
1000  !Diags.isIgnored(diag::warn_delegating_ctor_cycle, SourceLocation()))
1002 
1003  if (!Diags.hasErrorOccurred()) {
1004  if (ExternalSource)
1005  ExternalSource->ReadUndefinedButUsed(UndefinedButUsed);
1006  checkUndefinedButUsed(*this);
1007  }
1008 
1009  // A global-module-fragment is only permitted within a module unit.
1010  bool DiagnosedMissingModuleDeclaration = false;
1011  if (!ModuleScopes.empty() &&
1012  ModuleScopes.back().Module->Kind == Module::GlobalModuleFragment &&
1013  !ModuleScopes.back().ImplicitGlobalModuleFragment) {
1014  Diag(ModuleScopes.back().BeginLoc,
1015  diag::err_module_declaration_missing_after_global_module_introducer);
1016  DiagnosedMissingModuleDeclaration = true;
1017  }
1018 
1019  if (TUKind == TU_Module) {
1020  // If we are building a module interface unit, we need to have seen the
1021  // module declaration by now.
1022  if (getLangOpts().getCompilingModule() ==
1024  (ModuleScopes.empty() ||
1025  !ModuleScopes.back().Module->isModulePurview()) &&
1026  !DiagnosedMissingModuleDeclaration) {
1027  // FIXME: Make a better guess as to where to put the module declaration.
1028  Diag(getSourceManager().getLocForStartOfFile(
1029  getSourceManager().getMainFileID()),
1030  diag::err_module_declaration_missing);
1031  }
1032 
1033  // If we are building a module, resolve all of the exported declarations
1034  // now.
1035  if (Module *CurrentModule = PP.getCurrentModule()) {
1037 
1039  Stack.push_back(CurrentModule);
1040  while (!Stack.empty()) {
1041  Module *Mod = Stack.pop_back_val();
1042 
1043  // Resolve the exported declarations and conflicts.
1044  // FIXME: Actually complain, once we figure out how to teach the
1045  // diagnostic client to deal with complaints in the module map at this
1046  // point.
1047  ModMap.resolveExports(Mod, /*Complain=*/false);
1048  ModMap.resolveUses(Mod, /*Complain=*/false);
1049  ModMap.resolveConflicts(Mod, /*Complain=*/false);
1050 
1051  // Queue the submodules, so their exports will also be resolved.
1052  Stack.append(Mod->submodule_begin(), Mod->submodule_end());
1053  }
1054  }
1055 
1056  // Warnings emitted in ActOnEndOfTranslationUnit() should be emitted for
1057  // modules when they are built, not every time they are used.
1059  }
1060 
1061  // C99 6.9.2p2:
1062  // A declaration of an identifier for an object that has file
1063  // scope without an initializer, and without a storage-class
1064  // specifier or with the storage-class specifier static,
1065  // constitutes a tentative definition. If a translation unit
1066  // contains one or more tentative definitions for an identifier,
1067  // and the translation unit contains no external definition for
1068  // that identifier, then the behavior is exactly as if the
1069  // translation unit contains a file scope declaration of that
1070  // identifier, with the composite type as of the end of the
1071  // translation unit, with an initializer equal to 0.
1072  llvm::SmallSet<VarDecl *, 32> Seen;
1073  for (TentativeDefinitionsType::iterator
1074  T = TentativeDefinitions.begin(ExternalSource),
1075  TEnd = TentativeDefinitions.end();
1076  T != TEnd; ++T) {
1077  VarDecl *VD = (*T)->getActingDefinition();
1078 
1079  // If the tentative definition was completed, getActingDefinition() returns
1080  // null. If we've already seen this variable before, insert()'s second
1081  // return value is false.
1082  if (!VD || VD->isInvalidDecl() || !Seen.insert(VD).second)
1083  continue;
1084 
1085  if (const IncompleteArrayType *ArrayT
1087  // Set the length of the array to 1 (C99 6.9.2p5).
1088  Diag(VD->getLocation(), diag::warn_tentative_incomplete_array);
1089  llvm::APInt One(Context.getTypeSize(Context.getSizeType()), true);
1090  QualType T = Context.getConstantArrayType(ArrayT->getElementType(),
1091  One, ArrayType::Normal, 0);
1092  VD->setType(T);
1093  } else if (RequireCompleteType(VD->getLocation(), VD->getType(),
1094  diag::err_tentative_def_incomplete_type))
1095  VD->setInvalidDecl();
1096 
1097  // No initialization is performed for a tentative definition.
1099 
1100  // Notify the consumer that we've completed a tentative definition.
1101  if (!VD->isInvalidDecl())
1103  }
1104 
1105  // If there were errors, disable 'unused' warnings since they will mostly be
1106  // noise. Don't warn for a use from a module: either we should warn on all
1107  // file-scope declarations in modules or not at all, but whether the
1108  // declaration is used is immaterial.
1109  if (!Diags.hasErrorOccurred() && TUKind != TU_Module) {
1110  // Output warning for unused file scoped decls.
1111  for (UnusedFileScopedDeclsType::iterator
1112  I = UnusedFileScopedDecls.begin(ExternalSource),
1113  E = UnusedFileScopedDecls.end(); I != E; ++I) {
1114  if (ShouldRemoveFromUnused(this, *I))
1115  continue;
1116 
1117  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) {
1118  const FunctionDecl *DiagD;
1119  if (!FD->hasBody(DiagD))
1120  DiagD = FD;
1121  if (DiagD->isDeleted())
1122  continue; // Deleted functions are supposed to be unused.
1123  if (DiagD->isReferenced()) {
1124  if (isa<CXXMethodDecl>(DiagD))
1125  Diag(DiagD->getLocation(), diag::warn_unneeded_member_function)
1126  << DiagD->getDeclName();
1127  else {
1128  if (FD->getStorageClass() == SC_Static &&
1129  !FD->isInlineSpecified() &&
1131  SourceMgr.getExpansionLoc(FD->getLocation())))
1132  Diag(DiagD->getLocation(),
1133  diag::warn_unneeded_static_internal_decl)
1134  << DiagD->getDeclName();
1135  else
1136  Diag(DiagD->getLocation(), diag::warn_unneeded_internal_decl)
1137  << /*function*/0 << DiagD->getDeclName();
1138  }
1139  } else {
1140  if (FD->getDescribedFunctionTemplate())
1141  Diag(DiagD->getLocation(), diag::warn_unused_template)
1142  << /*function*/0 << DiagD->getDeclName();
1143  else
1144  Diag(DiagD->getLocation(),
1145  isa<CXXMethodDecl>(DiagD) ? diag::warn_unused_member_function
1146  : diag::warn_unused_function)
1147  << DiagD->getDeclName();
1148  }
1149  } else {
1150  const VarDecl *DiagD = cast<VarDecl>(*I)->getDefinition();
1151  if (!DiagD)
1152  DiagD = cast<VarDecl>(*I);
1153  if (DiagD->isReferenced()) {
1154  Diag(DiagD->getLocation(), diag::warn_unneeded_internal_decl)
1155  << /*variable*/1 << DiagD->getDeclName();
1156  } else if (DiagD->getType().isConstQualified()) {
1157  const SourceManager &SM = SourceMgr;
1158  if (SM.getMainFileID() != SM.getFileID(DiagD->getLocation()) ||
1160  Diag(DiagD->getLocation(), diag::warn_unused_const_variable)
1161  << DiagD->getDeclName();
1162  } else {
1163  if (DiagD->getDescribedVarTemplate())
1164  Diag(DiagD->getLocation(), diag::warn_unused_template)
1165  << /*variable*/1 << DiagD->getDeclName();
1166  else
1167  Diag(DiagD->getLocation(), diag::warn_unused_variable)
1168  << DiagD->getDeclName();
1169  }
1170  }
1171  }
1172 
1174  }
1175 
1176  if (!Diags.isIgnored(diag::warn_unused_private_field, SourceLocation())) {
1177  // FIXME: Load additional unused private field candidates from the external
1178  // source.
1179  RecordCompleteMap RecordsComplete;
1180  RecordCompleteMap MNCComplete;
1181  for (NamedDeclSetType::iterator I = UnusedPrivateFields.begin(),
1182  E = UnusedPrivateFields.end(); I != E; ++I) {
1183  const NamedDecl *D = *I;
1184  const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D->getDeclContext());
1185  if (RD && !RD->isUnion() &&
1186  IsRecordFullyDefined(RD, RecordsComplete, MNCComplete)) {
1187  Diag(D->getLocation(), diag::warn_unused_private_field)
1188  << D->getDeclName();
1189  }
1190  }
1191  }
1192 
1193  if (!Diags.isIgnored(diag::warn_mismatched_delete_new, SourceLocation())) {
1194  if (ExternalSource)
1196  for (const auto &DeletedFieldInfo : DeleteExprs) {
1197  for (const auto &DeleteExprLoc : DeletedFieldInfo.second) {
1198  AnalyzeDeleteExprMismatch(DeletedFieldInfo.first, DeleteExprLoc.first,
1199  DeleteExprLoc.second);
1200  }
1201  }
1202  }
1203 
1204  // Check we've noticed that we're no longer parsing the initializer for every
1205  // variable. If we miss cases, then at best we have a performance issue and
1206  // at worst a rejects-valid bug.
1207  assert(ParsingInitForAutoVars.empty() &&
1208  "Didn't unmark var as having its initializer parsed");
1209 
1211  TUScope = nullptr;
1212 }
1213 
1214 
1215 //===----------------------------------------------------------------------===//
1216 // Helper functions.
1217 //===----------------------------------------------------------------------===//
1218 
1220  DeclContext *DC = CurContext;
1221 
1222  while (true) {
1223  if (isa<BlockDecl>(DC) || isa<EnumDecl>(DC) || isa<CapturedDecl>(DC)) {
1224  DC = DC->getParent();
1225  } else if (isa<CXXMethodDecl>(DC) &&
1226  cast<CXXMethodDecl>(DC)->getOverloadedOperator() == OO_Call &&
1227  cast<CXXRecordDecl>(DC->getParent())->isLambda()) {
1228  DC = DC->getParent()->getParent();
1229  }
1230  else break;
1231  }
1232 
1233  return DC;
1234 }
1235 
1236 /// getCurFunctionDecl - If inside of a function body, this returns a pointer
1237 /// to the function decl for the function being parsed. If we're currently
1238 /// in a 'block', this returns the containing context.
1241  return dyn_cast<FunctionDecl>(DC);
1242 }
1243 
1246  while (isa<RecordDecl>(DC))
1247  DC = DC->getParent();
1248  return dyn_cast<ObjCMethodDecl>(DC);
1249 }
1250 
1253  if (isa<ObjCMethodDecl>(DC) || isa<FunctionDecl>(DC))
1254  return cast<NamedDecl>(DC);
1255  return nullptr;
1256 }
1257 
1258 void Sema::EmitCurrentDiagnostic(unsigned DiagID) {
1259  // FIXME: It doesn't make sense to me that DiagID is an incoming argument here
1260  // and yet we also use the current diag ID on the DiagnosticsEngine. This has
1261  // been made more painfully obvious by the refactor that introduced this
1262  // function, but it is possible that the incoming argument can be
1263  // eliminated. If it truly cannot be (for example, there is some reentrancy
1264  // issue I am not seeing yet), then there should at least be a clarifying
1265  // comment somewhere.
1268  Diags.getCurrentDiagID())) {
1270  // We'll report the diagnostic below.
1271  break;
1272 
1274  // Count this failure so that we know that template argument deduction
1275  // has failed.
1276  ++NumSFINAEErrors;
1277 
1278  // Make a copy of this suppressed diagnostic and store it with the
1279  // template-deduction information.
1280  if (*Info && !(*Info)->hasSFINAEDiagnostic()) {
1281  Diagnostic DiagInfo(&Diags);
1282  (*Info)->addSFINAEDiagnostic(DiagInfo.getLocation(),
1284  }
1285 
1287  Diags.Clear();
1288  return;
1289 
1291  // Per C++ Core Issue 1170, access control is part of SFINAE.
1292  // Additionally, the AccessCheckingSFINAE flag can be used to temporarily
1293  // make access control a part of SFINAE for the purposes of checking
1294  // type traits.
1296  break;
1297 
1299 
1300  // Suppress this diagnostic.
1301  ++NumSFINAEErrors;
1302 
1303  // Make a copy of this suppressed diagnostic and store it with the
1304  // template-deduction information.
1305  if (*Info && !(*Info)->hasSFINAEDiagnostic()) {
1306  Diagnostic DiagInfo(&Diags);
1307  (*Info)->addSFINAEDiagnostic(DiagInfo.getLocation(),
1309  }
1310 
1312  Diags.Clear();
1313 
1314  // Now the diagnostic state is clear, produce a C++98 compatibility
1315  // warning.
1316  Diag(Loc, diag::warn_cxx98_compat_sfinae_access_control);
1317 
1318  // The last diagnostic which Sema produced was ignored. Suppress any
1319  // notes attached to it.
1321  return;
1322  }
1323 
1325  // Make a copy of this suppressed diagnostic and store it with the
1326  // template-deduction information;
1327  if (*Info) {
1328  Diagnostic DiagInfo(&Diags);
1329  (*Info)->addSuppressedDiagnostic(DiagInfo.getLocation(),
1331  }
1332 
1333  // Suppress this diagnostic.
1335  Diags.Clear();
1336  return;
1337  }
1338  }
1339 
1340  // Copy the diagnostic printing policy over the ASTContext printing policy.
1341  // TODO: Stop doing that. See: https://reviews.llvm.org/D45093#1090292
1343 
1344  // Emit the diagnostic.
1346  return;
1347 
1348  // If this is not a note, and we're in a template instantiation
1349  // that is different from the last template instantiation where
1350  // we emitted an error, print a template instantiation
1351  // backtrace.
1352  if (!DiagnosticIDs::isBuiltinNote(DiagID))
1354 }
1355 
1358  SemaDiagnosticBuilder Builder(Diag(Loc, PD.getDiagID()));
1359  PD.Emit(Builder);
1360 
1361  return Builder;
1362 }
1363 
1364 // Print notes showing how we can reach FD starting from an a priori
1365 // known-callable function.
1366 static void emitCallStackNotes(Sema &S, FunctionDecl *FD) {
1367  auto FnIt = S.DeviceKnownEmittedFns.find(FD);
1368  while (FnIt != S.DeviceKnownEmittedFns.end()) {
1369  DiagnosticBuilder Builder(
1370  S.Diags.Report(FnIt->second.Loc, diag::note_called_by));
1371  Builder << FnIt->second.FD;
1372  Builder.setForceEmit();
1373 
1374  FnIt = S.DeviceKnownEmittedFns.find(FnIt->second.FD);
1375  }
1376 }
1377 
1378 // Emit any deferred diagnostics for FD and erase them from the map in which
1379 // they're stored.
1380 static void emitDeferredDiags(Sema &S, FunctionDecl *FD) {
1381  auto It = S.DeviceDeferredDiags.find(FD);
1382  if (It == S.DeviceDeferredDiags.end())
1383  return;
1384  bool HasWarningOrError = false;
1385  for (PartialDiagnosticAt &PDAt : It->second) {
1386  const SourceLocation &Loc = PDAt.first;
1387  const PartialDiagnostic &PD = PDAt.second;
1388  HasWarningOrError |= S.getDiagnostics().getDiagnosticLevel(
1389  PD.getDiagID(), Loc) >= DiagnosticsEngine::Warning;
1390  DiagnosticBuilder Builder(S.Diags.Report(Loc, PD.getDiagID()));
1391  Builder.setForceEmit();
1392  PD.Emit(Builder);
1393  }
1394  S.DeviceDeferredDiags.erase(It);
1395 
1396  // FIXME: Should this be called after every warning/error emitted in the loop
1397  // above, instead of just once per function? That would be consistent with
1398  // how we handle immediate errors, but it also seems like a bit much.
1399  if (HasWarningOrError)
1400  emitCallStackNotes(S, FD);
1401 }
1402 
1403 // In CUDA, there are some constructs which may appear in semantically-valid
1404 // code, but trigger errors if we ever generate code for the function in which
1405 // they appear. Essentially every construct you're not allowed to use on the
1406 // device falls into this category, because you are allowed to use these
1407 // constructs in a __host__ __device__ function, but only if that function is
1408 // never codegen'ed on the device.
1409 //
1410 // To handle semantic checking for these constructs, we keep track of the set of
1411 // functions we know will be emitted, either because we could tell a priori that
1412 // they would be emitted, or because they were transitively called by a
1413 // known-emitted function.
1414 //
1415 // We also keep a partial call graph of which not-known-emitted functions call
1416 // which other not-known-emitted functions.
1417 //
1418 // When we see something which is illegal if the current function is emitted
1419 // (usually by way of CUDADiagIfDeviceCode, CUDADiagIfHostCode, or
1420 // CheckCUDACall), we first check if the current function is known-emitted. If
1421 // so, we immediately output the diagnostic.
1422 //
1423 // Otherwise, we "defer" the diagnostic. It sits in Sema::DeviceDeferredDiags
1424 // until we discover that the function is known-emitted, at which point we take
1425 // it out of this map and emit the diagnostic.
1426 
1428  unsigned DiagID, FunctionDecl *Fn,
1429  Sema &S)
1430  : S(S), Loc(Loc), DiagID(DiagID), Fn(Fn),
1431  ShowCallStack(K == K_ImmediateWithCallStack || K == K_Deferred) {
1432  switch (K) {
1433  case K_Nop:
1434  break;
1435  case K_Immediate:
1437  ImmediateDiag.emplace(S.Diag(Loc, DiagID));
1438  break;
1439  case K_Deferred:
1440  assert(Fn && "Must have a function to attach the deferred diag to.");
1441  auto &Diags = S.DeviceDeferredDiags[Fn];
1442  PartialDiagId.emplace(Diags.size());
1443  Diags.emplace_back(Loc, S.PDiag(DiagID));
1444  break;
1445  }
1446 }
1447 
1449  : S(D.S), Loc(D.Loc), DiagID(D.DiagID), Fn(D.Fn),
1450  ShowCallStack(D.ShowCallStack), ImmediateDiag(D.ImmediateDiag),
1451  PartialDiagId(D.PartialDiagId) {
1452  // Clean the previous diagnostics.
1453  D.ShowCallStack = false;
1454  D.ImmediateDiag.reset();
1455  D.PartialDiagId.reset();
1456 }
1457 
1459  if (ImmediateDiag) {
1460  // Emit our diagnostic and, if it was a warning or error, output a callstack
1461  // if Fn isn't a priori known-emitted.
1462  bool IsWarningOrError = S.getDiagnostics().getDiagnosticLevel(
1463  DiagID, Loc) >= DiagnosticsEngine::Warning;
1464  ImmediateDiag.reset(); // Emit the immediate diag.
1465  if (IsWarningOrError && ShowCallStack)
1466  emitCallStackNotes(S, Fn);
1467  } else {
1468  assert((!PartialDiagId || ShowCallStack) &&
1469  "Must always show call stack for deferred diags.");
1470  }
1471 }
1472 
1473 // Indicate that this function (and thus everything it transtively calls) will
1474 // be codegen'ed, and emit any deferred diagnostics on this function and its
1475 // (transitive) callees.
1477  Sema &S, FunctionDecl *OrigCaller, FunctionDecl *OrigCallee,
1478  SourceLocation OrigLoc,
1479  const llvm::function_ref<bool(Sema &, FunctionDecl *)> IsKnownEmitted) {
1480  // Nothing to do if we already know that FD is emitted.
1481  if (IsKnownEmitted(S, OrigCallee)) {
1482  assert(!S.DeviceCallGraph.count(OrigCallee));
1483  return;
1484  }
1485 
1486  // We've just discovered that OrigCallee is known-emitted. Walk our call
1487  // graph to see what else we can now discover also must be emitted.
1488 
1489  struct CallInfo {
1490  FunctionDecl *Caller;
1491  FunctionDecl *Callee;
1492  SourceLocation Loc;
1493  };
1494  llvm::SmallVector<CallInfo, 4> Worklist = {{OrigCaller, OrigCallee, OrigLoc}};
1495  llvm::SmallSet<CanonicalDeclPtr<FunctionDecl>, 4> Seen;
1496  Seen.insert(OrigCallee);
1497  while (!Worklist.empty()) {
1498  CallInfo C = Worklist.pop_back_val();
1499  assert(!IsKnownEmitted(S, C.Callee) &&
1500  "Worklist should not contain known-emitted functions.");
1501  S.DeviceKnownEmittedFns[C.Callee] = {C.Caller, C.Loc};
1502  emitDeferredDiags(S, C.Callee);
1503 
1504  // If this is a template instantiation, explore its callgraph as well:
1505  // Non-dependent calls are part of the template's callgraph, while dependent
1506  // calls are part of to the instantiation's call graph.
1507  if (auto *Templ = C.Callee->getPrimaryTemplate()) {
1508  FunctionDecl *TemplFD = Templ->getAsFunction();
1509  if (!Seen.count(TemplFD) && !S.DeviceKnownEmittedFns.count(TemplFD)) {
1510  Seen.insert(TemplFD);
1511  Worklist.push_back(
1512  {/* Caller = */ C.Caller, /* Callee = */ TemplFD, C.Loc});
1513  }
1514  }
1515 
1516  // Add all functions called by Callee to our worklist.
1517  auto CGIt = S.DeviceCallGraph.find(C.Callee);
1518  if (CGIt == S.DeviceCallGraph.end())
1519  continue;
1520 
1521  for (std::pair<CanonicalDeclPtr<FunctionDecl>, SourceLocation> FDLoc :
1522  CGIt->second) {
1523  FunctionDecl *NewCallee = FDLoc.first;
1524  SourceLocation CallLoc = FDLoc.second;
1525  if (Seen.count(NewCallee) || IsKnownEmitted(S, NewCallee))
1526  continue;
1527  Seen.insert(NewCallee);
1528  Worklist.push_back(
1529  {/* Caller = */ C.Callee, /* Callee = */ NewCallee, CallLoc});
1530  }
1531 
1532  // C.Callee is now known-emitted, so we no longer need to maintain its list
1533  // of callees in DeviceCallGraph.
1534  S.DeviceCallGraph.erase(CGIt);
1535  }
1536 }
1537 
1539  if (LangOpts.OpenMP && LangOpts.OpenMPIsDevice)
1540  return diagIfOpenMPDeviceCode(Loc, DiagID);
1541  if (getLangOpts().CUDA)
1542  return getLangOpts().CUDAIsDevice ? CUDADiagIfDeviceCode(Loc, DiagID)
1543  : CUDADiagIfHostCode(Loc, DiagID);
1545  getCurFunctionDecl(), *this);
1546 }
1547 
1548 /// Looks through the macro-expansion chain for the given
1549 /// location, looking for a macro expansion with the given name.
1550 /// If one is found, returns true and sets the location to that
1551 /// expansion loc.
1552 bool Sema::findMacroSpelling(SourceLocation &locref, StringRef name) {
1553  SourceLocation loc = locref;
1554  if (!loc.isMacroID()) return false;
1555 
1556  // There's no good way right now to look at the intermediate
1557  // expansions, so just jump to the expansion location.
1558  loc = getSourceManager().getExpansionLoc(loc);
1559 
1560  // If that's written with the name, stop here.
1561  SmallVector<char, 16> buffer;
1562  if (getPreprocessor().getSpelling(loc, buffer) == name) {
1563  locref = loc;
1564  return true;
1565  }
1566  return false;
1567 }
1568 
1569 /// Determines the active Scope associated with the given declaration
1570 /// context.
1571 ///
1572 /// This routine maps a declaration context to the active Scope object that
1573 /// represents that declaration context in the parser. It is typically used
1574 /// from "scope-less" code (e.g., template instantiation, lazy creation of
1575 /// declarations) that injects a name for name-lookup purposes and, therefore,
1576 /// must update the Scope.
1577 ///
1578 /// \returns The scope corresponding to the given declaraion context, or NULL
1579 /// if no such scope is open.
1581 
1582  if (!Ctx)
1583  return nullptr;
1584 
1585  Ctx = Ctx->getPrimaryContext();
1586  for (Scope *S = getCurScope(); S; S = S->getParent()) {
1587  // Ignore scopes that cannot have declarations. This is important for
1588  // out-of-line definitions of static class members.
1589  if (S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope))
1590  if (DeclContext *Entity = S->getEntity())
1591  if (Ctx == Entity->getPrimaryContext())
1592  return S;
1593  }
1594 
1595  return nullptr;
1596 }
1597 
1598 /// Enter a new function scope
1600  if (FunctionScopes.empty()) {
1601  // Use PreallocatedFunctionScope to avoid allocating memory when possible.
1602  PreallocatedFunctionScope->Clear();
1603  FunctionScopes.push_back(PreallocatedFunctionScope.get());
1604  } else {
1606  }
1607  if (LangOpts.OpenMP)
1608  pushOpenMPFunctionRegion();
1609 }
1610 
1611 void Sema::PushBlockScope(Scope *BlockScope, BlockDecl *Block) {
1613  BlockScope, Block));
1614 }
1615 
1617  LambdaScopeInfo *const LSI = new LambdaScopeInfo(getDiagnostics());
1618  FunctionScopes.push_back(LSI);
1619  return LSI;
1620 }
1621 
1623  if (LambdaScopeInfo *const LSI = getCurLambda()) {
1624  LSI->AutoTemplateParameterDepth = Depth;
1625  return;
1626  }
1627  llvm_unreachable(
1628  "Remove assertion if intentionally called in a non-lambda context.");
1629 }
1630 
1631 // Check that the type of the VarDecl has an accessible copy constructor and
1632 // resolve its destructor's exception spefication.
1633 static void checkEscapingByref(VarDecl *VD, Sema &S) {
1634  QualType T = VD->getType();
1637  SourceLocation Loc = VD->getLocation();
1638  Expr *VarRef =
1639  new (S.Context) DeclRefExpr(S.Context, VD, false, T, VK_LValue, Loc);
1641  InitializedEntity::InitializeBlock(Loc, T, false), VD, VD->getType(),
1642  VarRef, /*AllowNRVO=*/true);
1643  if (!Result.isInvalid()) {
1644  Result = S.MaybeCreateExprWithCleanups(Result);
1645  Expr *Init = Result.getAs<Expr>();
1646  S.Context.setBlockVarCopyInit(VD, Init, S.canThrow(Init));
1647  }
1648 
1649  // The destructor's exception spefication is needed when IRGen generates
1650  // block copy/destroy functions. Resolve it here.
1651  if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl())
1652  if (CXXDestructorDecl *DD = RD->getDestructor()) {
1653  auto *FPT = DD->getType()->getAs<FunctionProtoType>();
1654  S.ResolveExceptionSpec(Loc, FPT);
1655  }
1656 }
1657 
1658 static void markEscapingByrefs(const FunctionScopeInfo &FSI, Sema &S) {
1659  // Set the EscapingByref flag of __block variables captured by
1660  // escaping blocks.
1661  for (const BlockDecl *BD : FSI.Blocks) {
1662  if (BD->doesNotEscape())
1663  continue;
1664  for (const BlockDecl::Capture &BC : BD->captures()) {
1665  VarDecl *VD = BC.getVariable();
1666  if (VD->hasAttr<BlocksAttr>())
1667  VD->setEscapingByref();
1668  }
1669  }
1670 
1671  for (VarDecl *VD : FSI.ByrefBlockVars) {
1672  // __block variables might require us to capture a copy-initializer.
1673  if (!VD->isEscapingByref())
1674  continue;
1675  // It's currently invalid to ever have a __block variable with an
1676  // array type; should we diagnose that here?
1677  // Regardless, we don't want to ignore array nesting when
1678  // constructing this copy.
1679  if (VD->getType()->isStructureOrClassType())
1680  checkEscapingByref(VD, S);
1681  }
1682 }
1683 
1685  const Decl *D, const BlockExpr *blkExpr) {
1686  assert(!FunctionScopes.empty() && "mismatched push/pop!");
1687 
1688  // This function shouldn't be called after popping the current function scope.
1689  // markEscapingByrefs calls PerformMoveOrCopyInitialization, which can call
1690  // PushFunctionScope, which can cause clearing out PreallocatedFunctionScope
1691  // when FunctionScopes is empty.
1692  markEscapingByrefs(*FunctionScopes.back(), *this);
1693 
1694  FunctionScopeInfo *Scope = FunctionScopes.pop_back_val();
1695 
1696  if (LangOpts.OpenMP)
1697  popOpenMPFunctionRegion(Scope);
1698 
1699  // Issue any analysis-based warnings.
1700  if (WP && D)
1701  AnalysisWarnings.IssueWarnings(*WP, Scope, D, blkExpr);
1702  else
1703  for (const auto &PUD : Scope->PossiblyUnreachableDiags)
1704  Diag(PUD.Loc, PUD.PD);
1705 
1706  // Delete the scope unless its our preallocated scope.
1707  if (Scope != PreallocatedFunctionScope.get())
1708  delete Scope;
1709 }
1710 
1711 void Sema::PushCompoundScope(bool IsStmtExpr) {
1712  getCurFunction()->CompoundScopes.push_back(CompoundScopeInfo(IsStmtExpr));
1713 }
1714 
1716  FunctionScopeInfo *CurFunction = getCurFunction();
1717  assert(!CurFunction->CompoundScopes.empty() && "mismatched push/pop");
1718 
1719  CurFunction->CompoundScopes.pop_back();
1720 }
1721 
1722 /// Determine whether any errors occurred within this function/method/
1723 /// block.
1726 }
1727 
1729  if (!FunctionScopes.empty())
1730  FunctionScopes.back()->setHasBranchIntoScope();
1731 }
1732 
1734  if (!FunctionScopes.empty())
1735  FunctionScopes.back()->setHasBranchProtectedScope();
1736 }
1737 
1739  if (!FunctionScopes.empty())
1740  FunctionScopes.back()->setHasIndirectGoto();
1741 }
1742 
1744  if (FunctionScopes.empty())
1745  return nullptr;
1746 
1747  auto CurBSI = dyn_cast<BlockScopeInfo>(FunctionScopes.back());
1748  if (CurBSI && CurBSI->TheDecl &&
1749  !CurBSI->TheDecl->Encloses(CurContext)) {
1750  // We have switched contexts due to template instantiation.
1751  assert(!CodeSynthesisContexts.empty());
1752  return nullptr;
1753  }
1754 
1755  return CurBSI;
1756 }
1757 
1759  if (FunctionScopes.empty())
1760  return nullptr;
1761 
1762  for (int e = FunctionScopes.size() - 1; e >= 0; --e) {
1763  if (isa<sema::BlockScopeInfo>(FunctionScopes[e]))
1764  continue;
1765  return FunctionScopes[e];
1766  }
1767  return nullptr;
1768 }
1769 
1770 LambdaScopeInfo *Sema::getCurLambda(bool IgnoreNonLambdaCapturingScope) {
1771  if (FunctionScopes.empty())
1772  return nullptr;
1773 
1774  auto I = FunctionScopes.rbegin();
1775  if (IgnoreNonLambdaCapturingScope) {
1776  auto E = FunctionScopes.rend();
1777  while (I != E && isa<CapturingScopeInfo>(*I) && !isa<LambdaScopeInfo>(*I))
1778  ++I;
1779  if (I == E)
1780  return nullptr;
1781  }
1782  auto *CurLSI = dyn_cast<LambdaScopeInfo>(*I);
1783  if (CurLSI && CurLSI->Lambda &&
1784  !CurLSI->Lambda->Encloses(CurContext)) {
1785  // We have switched contexts due to template instantiation.
1786  assert(!CodeSynthesisContexts.empty());
1787  return nullptr;
1788  }
1789 
1790  return CurLSI;
1791 }
1792 // We have a generic lambda if we parsed auto parameters, or we have
1793 // an associated template parameter list.
1795  if (LambdaScopeInfo *LSI = getCurLambda()) {
1796  return (LSI->AutoTemplateParams.size() ||
1797  LSI->GLTemplateParameterList) ? LSI : nullptr;
1798  }
1799  return nullptr;
1800 }
1801 
1802 
1804  if (!LangOpts.RetainCommentsFromSystemHeaders &&
1805  SourceMgr.isInSystemHeader(Comment.getBegin()))
1806  return;
1807  RawComment RC(SourceMgr, Comment, LangOpts.CommentOpts, false);
1808  if (RC.isAlmostTrailingComment()) {
1809  SourceRange MagicMarkerRange(Comment.getBegin(),
1810  Comment.getBegin().getLocWithOffset(3));
1811  StringRef MagicMarkerText;
1812  switch (RC.getKind()) {
1814  MagicMarkerText = "///<";
1815  break;
1817  MagicMarkerText = "/**<";
1818  break;
1819  default:
1820  llvm_unreachable("if this is an almost Doxygen comment, "
1821  "it should be ordinary");
1822  }
1823  Diag(Comment.getBegin(), diag::warn_not_a_doxygen_trailing_member_comment) <<
1824  FixItHint::CreateReplacement(MagicMarkerRange, MagicMarkerText);
1825  }
1826  Context.addComment(RC);
1827 }
1828 
1829 // Pin this vtable to this file.
1831 
1834 
1836  SmallVectorImpl<NamespaceDecl *> &Namespaces) {
1837 }
1838 
1840  llvm::MapVector<NamedDecl *, SourceLocation> &Undefined) {}
1841 
1843  FieldDecl *, llvm::SmallVector<std::pair<SourceLocation, bool>, 4>> &) {}
1844 
1845 /// Figure out if an expression could be turned into a call.
1846 ///
1847 /// Use this when trying to recover from an error where the programmer may have
1848 /// written just the name of a function instead of actually calling it.
1849 ///
1850 /// \param E - The expression to examine.
1851 /// \param ZeroArgCallReturnTy - If the expression can be turned into a call
1852 /// with no arguments, this parameter is set to the type returned by such a
1853 /// call; otherwise, it is set to an empty QualType.
1854 /// \param OverloadSet - If the expression is an overloaded function
1855 /// name, this parameter is populated with the decls of the various overloads.
1856 bool Sema::tryExprAsCall(Expr &E, QualType &ZeroArgCallReturnTy,
1857  UnresolvedSetImpl &OverloadSet) {
1858  ZeroArgCallReturnTy = QualType();
1859  OverloadSet.clear();
1860 
1861  const OverloadExpr *Overloads = nullptr;
1862  bool IsMemExpr = false;
1863  if (E.getType() == Context.OverloadTy) {
1864  OverloadExpr::FindResult FR = OverloadExpr::find(const_cast<Expr*>(&E));
1865 
1866  // Ignore overloads that are pointer-to-member constants.
1867  if (FR.HasFormOfMemberPointer)
1868  return false;
1869 
1870  Overloads = FR.Expression;
1871  } else if (E.getType() == Context.BoundMemberTy) {
1872  Overloads = dyn_cast<UnresolvedMemberExpr>(E.IgnoreParens());
1873  IsMemExpr = true;
1874  }
1875 
1876  bool Ambiguous = false;
1877  bool IsMV = false;
1878 
1879  if (Overloads) {
1880  for (OverloadExpr::decls_iterator it = Overloads->decls_begin(),
1881  DeclsEnd = Overloads->decls_end(); it != DeclsEnd; ++it) {
1882  OverloadSet.addDecl(*it);
1883 
1884  // Check whether the function is a non-template, non-member which takes no
1885  // arguments.
1886  if (IsMemExpr)
1887  continue;
1888  if (const FunctionDecl *OverloadDecl
1889  = dyn_cast<FunctionDecl>((*it)->getUnderlyingDecl())) {
1890  if (OverloadDecl->getMinRequiredArguments() == 0) {
1891  if (!ZeroArgCallReturnTy.isNull() && !Ambiguous &&
1892  (!IsMV || !(OverloadDecl->isCPUDispatchMultiVersion() ||
1893  OverloadDecl->isCPUSpecificMultiVersion()))) {
1894  ZeroArgCallReturnTy = QualType();
1895  Ambiguous = true;
1896  } else {
1897  ZeroArgCallReturnTy = OverloadDecl->getReturnType();
1898  IsMV = OverloadDecl->isCPUDispatchMultiVersion() ||
1899  OverloadDecl->isCPUSpecificMultiVersion();
1900  }
1901  }
1902  }
1903  }
1904 
1905  // If it's not a member, use better machinery to try to resolve the call
1906  if (!IsMemExpr)
1907  return !ZeroArgCallReturnTy.isNull();
1908  }
1909 
1910  // Attempt to call the member with no arguments - this will correctly handle
1911  // member templates with defaults/deduction of template arguments, overloads
1912  // with default arguments, etc.
1913  if (IsMemExpr && !E.isTypeDependent()) {
1914  bool Suppress = getDiagnostics().getSuppressAllDiagnostics();
1917  None, SourceLocation());
1919  if (R.isUsable()) {
1920  ZeroArgCallReturnTy = R.get()->getType();
1921  return true;
1922  }
1923  return false;
1924  }
1925 
1926  if (const DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E.IgnoreParens())) {
1927  if (const FunctionDecl *Fun = dyn_cast<FunctionDecl>(DeclRef->getDecl())) {
1928  if (Fun->getMinRequiredArguments() == 0)
1929  ZeroArgCallReturnTy = Fun->getReturnType();
1930  return true;
1931  }
1932  }
1933 
1934  // We don't have an expression that's convenient to get a FunctionDecl from,
1935  // but we can at least check if the type is "function of 0 arguments".
1936  QualType ExprTy = E.getType();
1937  const FunctionType *FunTy = nullptr;
1938  QualType PointeeTy = ExprTy->getPointeeType();
1939  if (!PointeeTy.isNull())
1940  FunTy = PointeeTy->getAs<FunctionType>();
1941  if (!FunTy)
1942  FunTy = ExprTy->getAs<FunctionType>();
1943 
1944  if (const FunctionProtoType *FPT =
1945  dyn_cast_or_null<FunctionProtoType>(FunTy)) {
1946  if (FPT->getNumParams() == 0)
1947  ZeroArgCallReturnTy = FunTy->getReturnType();
1948  return true;
1949  }
1950  return false;
1951 }
1952 
1953 /// Give notes for a set of overloads.
1954 ///
1955 /// A companion to tryExprAsCall. In cases when the name that the programmer
1956 /// wrote was an overloaded function, we may be able to make some guesses about
1957 /// plausible overloads based on their return types; such guesses can be handed
1958 /// off to this method to be emitted as notes.
1959 ///
1960 /// \param Overloads - The overloads to note.
1961 /// \param FinalNoteLoc - If we've suppressed printing some overloads due to
1962 /// -fshow-overloads=best, this is the location to attach to the note about too
1963 /// many candidates. Typically this will be the location of the original
1964 /// ill-formed expression.
1965 static void noteOverloads(Sema &S, const UnresolvedSetImpl &Overloads,
1966  const SourceLocation FinalNoteLoc) {
1967  int ShownOverloads = 0;
1968  int SuppressedOverloads = 0;
1969  for (UnresolvedSetImpl::iterator It = Overloads.begin(),
1970  DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) {
1971  // FIXME: Magic number for max shown overloads stolen from
1972  // OverloadCandidateSet::NoteCandidates.
1973  if (ShownOverloads >= 4 && S.Diags.getShowOverloads() == Ovl_Best) {
1974  ++SuppressedOverloads;
1975  continue;
1976  }
1977 
1978  NamedDecl *Fn = (*It)->getUnderlyingDecl();
1979  // Don't print overloads for non-default multiversioned functions.
1980  if (const auto *FD = Fn->getAsFunction()) {
1981  if (FD->isMultiVersion() && FD->hasAttr<TargetAttr>() &&
1982  !FD->getAttr<TargetAttr>()->isDefaultVersion())
1983  continue;
1984  }
1985  S.Diag(Fn->getLocation(), diag::note_possible_target_of_call);
1986  ++ShownOverloads;
1987  }
1988 
1989  if (SuppressedOverloads)
1990  S.Diag(FinalNoteLoc, diag::note_ovl_too_many_candidates)
1991  << SuppressedOverloads;
1992 }
1993 
1995  const UnresolvedSetImpl &Overloads,
1996  bool (*IsPlausibleResult)(QualType)) {
1997  if (!IsPlausibleResult)
1998  return noteOverloads(S, Overloads, Loc);
1999 
2000  UnresolvedSet<2> PlausibleOverloads;
2001  for (OverloadExpr::decls_iterator It = Overloads.begin(),
2002  DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) {
2003  const FunctionDecl *OverloadDecl = cast<FunctionDecl>(*It);
2004  QualType OverloadResultTy = OverloadDecl->getReturnType();
2005  if (IsPlausibleResult(OverloadResultTy))
2006  PlausibleOverloads.addDecl(It.getDecl());
2007  }
2008  noteOverloads(S, PlausibleOverloads, Loc);
2009 }
2010 
2011 /// Determine whether the given expression can be called by just
2012 /// putting parentheses after it. Notably, expressions with unary
2013 /// operators can't be because the unary operator will start parsing
2014 /// outside the call.
2015 static bool IsCallableWithAppend(Expr *E) {
2016  E = E->IgnoreImplicit();
2017  return (!isa<CStyleCastExpr>(E) &&
2018  !isa<UnaryOperator>(E) &&
2019  !isa<BinaryOperator>(E) &&
2020  !isa<CXXOperatorCallExpr>(E));
2021 }
2022 
2024  if (const auto *UO = dyn_cast<UnaryOperator>(E))
2025  E = UO->getSubExpr();
2026 
2027  if (const auto *ULE = dyn_cast<UnresolvedLookupExpr>(E)) {
2028  if (ULE->getNumDecls() == 0)
2029  return false;
2030 
2031  const NamedDecl *ND = *ULE->decls_begin();
2032  if (const auto *FD = dyn_cast<FunctionDecl>(ND))
2033  return FD->isCPUDispatchMultiVersion() || FD->isCPUSpecificMultiVersion();
2034  }
2035  return false;
2036 }
2037 
2039  bool ForceComplain,
2040  bool (*IsPlausibleResult)(QualType)) {
2041  SourceLocation Loc = E.get()->getExprLoc();
2042  SourceRange Range = E.get()->getSourceRange();
2043 
2044  QualType ZeroArgCallTy;
2045  UnresolvedSet<4> Overloads;
2046  if (tryExprAsCall(*E.get(), ZeroArgCallTy, Overloads) &&
2047  !ZeroArgCallTy.isNull() &&
2048  (!IsPlausibleResult || IsPlausibleResult(ZeroArgCallTy))) {
2049  // At this point, we know E is potentially callable with 0
2050  // arguments and that it returns something of a reasonable type,
2051  // so we can emit a fixit and carry on pretending that E was
2052  // actually a CallExpr.
2053  SourceLocation ParenInsertionLoc = getLocForEndOfToken(Range.getEnd());
2054  bool IsMV = IsCPUDispatchCPUSpecificMultiVersion(E.get());
2055  Diag(Loc, PD) << /*zero-arg*/ 1 << IsMV << Range
2056  << (IsCallableWithAppend(E.get())
2057  ? FixItHint::CreateInsertion(ParenInsertionLoc, "()")
2058  : FixItHint());
2059  if (!IsMV)
2060  notePlausibleOverloads(*this, Loc, Overloads, IsPlausibleResult);
2061 
2062  // FIXME: Try this before emitting the fixit, and suppress diagnostics
2063  // while doing so.
2064  E = ActOnCallExpr(nullptr, E.get(), Range.getEnd(), None,
2065  Range.getEnd().getLocWithOffset(1));
2066  return true;
2067  }
2068 
2069  if (!ForceComplain) return false;
2070 
2071  bool IsMV = IsCPUDispatchCPUSpecificMultiVersion(E.get());
2072  Diag(Loc, PD) << /*not zero-arg*/ 0 << IsMV << Range;
2073  if (!IsMV)
2074  notePlausibleOverloads(*this, Loc, Overloads, IsPlausibleResult);
2075  E = ExprError();
2076  return true;
2077 }
2078 
2080  if (!Ident_super)
2081  Ident_super = &Context.Idents.get("super");
2082  return Ident_super;
2083 }
2084 
2086  if (!Ident___float128)
2087  Ident___float128 = &Context.Idents.get("__float128");
2088  return Ident___float128;
2089 }
2090 
2092  CapturedRegionKind K) {
2094  getDiagnostics(), S, CD, RD, CD->getContextParam(), K,
2095  (getLangOpts().OpenMP && K == CR_OpenMP) ? getOpenMPNestingLevel() : 0);
2096  CSI->ReturnType = Context.VoidTy;
2097  FunctionScopes.push_back(CSI);
2098 }
2099 
2101  if (FunctionScopes.empty())
2102  return nullptr;
2103 
2104  return dyn_cast<CapturedRegionScopeInfo>(FunctionScopes.back());
2105 }
2106 
2107 const llvm::MapVector<FieldDecl *, Sema::DeleteLocs> &
2109  return DeleteExprs;
2110 }
2111 
2112 void Sema::setOpenCLExtensionForType(QualType T, llvm::StringRef ExtStr) {
2113  if (ExtStr.empty())
2114  return;
2116  ExtStr.split(Exts, " ", /* limit */ -1, /* keep empty */ false);
2117  auto CanT = T.getCanonicalType().getTypePtr();
2118  for (auto &I : Exts)
2119  OpenCLTypeExtMap[CanT].insert(I.str());
2120 }
2121 
2122 void Sema::setOpenCLExtensionForDecl(Decl *FD, StringRef ExtStr) {
2124  ExtStr.split(Exts, " ", /* limit */ -1, /* keep empty */ false);
2125  if (Exts.empty())
2126  return;
2127  for (auto &I : Exts)
2128  OpenCLDeclExtMap[FD].insert(I.str());
2129 }
2130 
2132  if (CurrOpenCLExtension.empty())
2133  return;
2134  setOpenCLExtensionForType(T, CurrOpenCLExtension);
2135 }
2136 
2138  if (CurrOpenCLExtension.empty())
2139  return;
2140  setOpenCLExtensionForDecl(D, CurrOpenCLExtension);
2141 }
2142 
2144  if (!OpenCLDeclExtMap.empty())
2145  return getOpenCLExtensionsFromExtMap(FD, OpenCLDeclExtMap);
2146 
2147  return "";
2148 }
2149 
2151  if (!OpenCLTypeExtMap.empty())
2152  return getOpenCLExtensionsFromExtMap(FT, OpenCLTypeExtMap);
2153 
2154  return "";
2155 }
2156 
2157 template <typename T, typename MapT>
2158 std::string Sema::getOpenCLExtensionsFromExtMap(T *FDT, MapT &Map) {
2159  std::string ExtensionNames = "";
2160  auto Loc = Map.find(FDT);
2161 
2162  for (auto const& I : Loc->second) {
2163  ExtensionNames += I;
2164  ExtensionNames += " ";
2165  }
2166  ExtensionNames.pop_back();
2167 
2168  return ExtensionNames;
2169 }
2170 
2172  auto Loc = OpenCLDeclExtMap.find(FD);
2173  if (Loc == OpenCLDeclExtMap.end())
2174  return false;
2175  for (auto &I : Loc->second) {
2176  if (!getOpenCLOptions().isEnabled(I))
2177  return true;
2178  }
2179  return false;
2180 }
2181 
2182 template <typename T, typename DiagLocT, typename DiagInfoT, typename MapT>
2183 bool Sema::checkOpenCLDisabledTypeOrDecl(T D, DiagLocT DiagLoc,
2184  DiagInfoT DiagInfo, MapT &Map,
2185  unsigned Selector,
2186  SourceRange SrcRange) {
2187  auto Loc = Map.find(D);
2188  if (Loc == Map.end())
2189  return false;
2190  bool Disabled = false;
2191  for (auto &I : Loc->second) {
2192  if (I != CurrOpenCLExtension && !getOpenCLOptions().isEnabled(I)) {
2193  Diag(DiagLoc, diag::err_opencl_requires_extension) << Selector << DiagInfo
2194  << I << SrcRange;
2195  Disabled = true;
2196  }
2197  }
2198  return Disabled;
2199 }
2200 
2202  // Check extensions for declared types.
2203  Decl *Decl = nullptr;
2204  if (auto TypedefT = dyn_cast<TypedefType>(QT.getTypePtr()))
2205  Decl = TypedefT->getDecl();
2206  if (auto TagT = dyn_cast<TagType>(QT.getCanonicalType().getTypePtr()))
2207  Decl = TagT->getDecl();
2208  auto Loc = DS.getTypeSpecTypeLoc();
2209 
2210  // Check extensions for vector types.
2211  // e.g. double4 is not allowed when cl_khr_fp64 is absent.
2212  if (QT->isExtVectorType()) {
2213  auto TypePtr = QT->castAs<ExtVectorType>()->getElementType().getTypePtr();
2214  return checkOpenCLDisabledTypeOrDecl(TypePtr, Loc, QT, OpenCLTypeExtMap);
2215  }
2216 
2217  if (checkOpenCLDisabledTypeOrDecl(Decl, Loc, QT, OpenCLDeclExtMap))
2218  return true;
2219 
2220  // Check extensions for builtin types.
2221  return checkOpenCLDisabledTypeOrDecl(QT.getCanonicalType().getTypePtr(), Loc,
2222  QT, OpenCLTypeExtMap);
2223 }
2224 
2226  IdentifierInfo *FnName = D.getIdentifier();
2227  return checkOpenCLDisabledTypeOrDecl(&D, E.getBeginLoc(), FnName,
2228  OpenCLDeclExtMap, 1, D.getSourceRange());
2229 }
RecordDecl * buildImplicitRecord(StringRef Name, RecordDecl::TagKind TK=TTK_Struct) const
Create a new implicit TU-level CXXRecordDecl or RecordDecl declaration.
VarTemplateDecl * getDescribedVarTemplate() const
Retrieves the variable template that is described by this variable declaration.
Definition: Decl.cpp:2467
SourceLocation getLocForStartOfFile(FileID FID) const
Return the source location corresponding to the first byte of the specified file. ...
const IncompleteArrayType * getAsIncompleteArrayType(QualType T) const
Definition: ASTContext.h:2432
Defines the clang::ASTContext interface.
ObjCInterfaceDecl * NSStringDecl
The declaration of the Objective-C NSString class.
Definition: Sema.h:928
CanThrowResult canThrow(const Expr *E)
UnusedFileScopedDeclsType UnusedFileScopedDecls
The set of file scoped decls seen so far that have not been used and must warn if not used...
Definition: Sema.h:661
Represents a function declaration or definition.
Definition: Decl.h:1737
llvm::SmallSetVector< const TypedefNameDecl *, 4 > UnusedLocalTypedefNameCandidates
Set containing all typedefs that are likely unused.
Definition: Sema.h:623
bool hasErrorOccurred() const
Definition: Diagnostic.h:748
bool hasBuiltinMSVaList() const
Returns whether or not type __builtin_ms_va_list type is available on this target.
Definition: TargetInfo.h:768
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
CanQualType OCLQueueTy
Definition: ASTContext.h:1053
Smart pointer class that efficiently represents Objective-C method names.
A class which contains all the information about a particular captured value.
Definition: Decl.h:3863
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
TypedefDecl * getCFConstantStringDecl() const
A (possibly-)qualified type.
Definition: Type.h:639
ASTConsumer & Consumer
Definition: Sema.h:375
LateTemplateParserCB * LateTemplateParser
Definition: Sema.h:703
void Initialize()
Perform initialization that occurs after the parser has been initialized but before it parses anythin...
Definition: Sema.cpp:197
DeviceDiagBuilder(Kind K, SourceLocation Loc, unsigned DiagID, FunctionDecl *Fn, Sema &S)
Definition: Sema.cpp:1427
IdentifierInfo * getIdentifierInfo(StringRef Name) const
Return information about the specified preprocessor identifier token.
ASTConsumer - This is an abstract interface that should be implemented by clients that read ASTs...
Definition: ASTConsumer.h:33
DeclContext * getFunctionLevelDeclContext()
Definition: Sema.cpp:1219
RecordDecl * MSVCGuidDecl
The MSVC "_GUID" struct, which is defined in MSVC header files.
Definition: Sema.h:907
const FunctionProtoType * ResolveExceptionSpec(SourceLocation Loc, const FunctionProtoType *FPT)
Emit the diagnostic immediately, and, if it&#39;s a warning or error, also emit a call stack showing how ...
Definition: Sema.h:10254
Ordinary name lookup, which finds ordinary names (functions, variables, typedefs, etc...
Definition: Sema.h:3155
A class which encapsulates the logic for delaying diagnostics during parsing and other processing...
Definition: Sema.h:726
void CheckCompleteVariableDeclaration(VarDecl *VD)
Definition: SemaDecl.cpp:11791
void getUndefinedButUsed(SmallVectorImpl< std::pair< NamedDecl *, SourceLocation > > &Undefined)
Obtain a sorted list of functions that are undefined but ODR-used.
Definition: Sema.cpp:638
submodule_iterator submodule_begin()
Definition: Module.h:562
QualType getPointerDiffType() const
Return the unique type for "ptrdiff_t" (C99 7.17) defined in <stddef.h>.
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3367
CXXFieldCollector - Used to keep track of CXXFieldDecls during parsing of C++ classes.
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee...
Definition: Type.cpp:505
QualType ReturnType
ReturnType - The target type of return statements in this context, or null if unknown.
Definition: ScopeInfo.h:649
static void notePlausibleOverloads(Sema &S, SourceLocation Loc, const UnresolvedSetImpl &Overloads, bool(*IsPlausibleResult)(QualType))
Definition: Sema.cpp:1994
SmallVector< std::pair< const CXXMethodDecl *, const CXXMethodDecl * >, 2 > DelayedOverridingExceptionSpecChecks
All the overriding functions seen during a class definition that had their exception spec checks dela...
Definition: Sema.h:675
virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason, SrcMgr::CharacteristicKind FileType, FileID PrevFID) override
Callback invoked whenever a source file is entered or exited.
Definition: Sema.cpp:87
SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Emit a diagnostic.
Definition: Sema.h:1363
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
Module * getCurrentModule()
Retrieves the module that we&#39;re currently building, if any.
ExprResult BuildCallToMemberFunction(Scope *S, Expr *MemExpr, SourceLocation LParenLoc, MultiExprArg Args, SourceLocation RParenLoc)
BuildCallToMemberFunction - Build a call to a member function.
bool isExtVectorType() const
Definition: Type.h:6397
VarDecl * getDefinition(ASTContext &)
Get the real (not just tentative) definition for this declaration.
Definition: Decl.cpp:2145
std::deque< PendingImplicitInstantiation > PendingInstantiations
The queue of implicit template instantiations that are required but have not yet been performed...
Definition: Sema.h:7764
ModuleLoader & getModuleLoader() const
Retrieve the module loader associated with the preprocessor.
Definition: Sema.cpp:51
Scope * TUScope
Translation Unit Scope - useful to Objective-C actions that need to lookup file scope declarations in...
Definition: Sema.h:878
The translation unit is a prefix to a translation unit, and is not complete.
Definition: LangOptions.h:367
SmallVector< CodeSynthesisContext, 16 > CodeSynthesisContexts
List of active code synthesis contexts.
Definition: Sema.h:7401
virtual void updateOutOfDateSelector(Selector Sel)
Load the contents of the global method pool for a given selector if necessary.
Definition: Sema.cpp:1833
virtual void ReadMethodPool(Selector Sel)
Load the contents of the global method pool for a given selector.
Definition: Sema.cpp:1832
CanQualType LongTy
Definition: ASTContext.h:1024
const DiagnosticBuilder & setForceEmit() const
Forces the diagnostic to be emitted.
Definition: Diagnostic.h:1135
Any normal BCPL comments.
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1296
Declaration of a variable template.
static bool IsCPUDispatchCPUSpecificMultiVersion(const Expr *E)
Definition: Sema.cpp:2023
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Calls Lexer::getLocForEndOfToken()
Definition: Sema.cpp:47
const TargetInfo & getTargetInfo() const
Definition: ASTContext.h:689
A container of type source information.
Definition: Decl.h:86
Linkage getLinkage() const
Determine the linkage of this type.
Definition: Type.cpp:3668
bool getSuppressSystemWarnings() const
Definition: Diagnostic.h:627
IdentifierInfo * getSuperIdentifier() const
Definition: Sema.cpp:2079
The diagnostic should not be reported, but it should cause template argument deduction to fail...
void ActOnEndOfTranslationUnitFragment(TUFragmentKind Kind)
Definition: Sema.cpp:860
void LoadExternalWeakUndeclaredIdentifiers()
Load weak undeclared identifiers from the external source.
Definition: Sema.cpp:741
QualType getAtomicType(QualType T) const
Return the uniqued reference to the atomic type for the specified type.
unsigned NonInstantiationEntries
The number of CodeSynthesisContexts that are not template instantiations and, therefore, should not be counted as part of the instantiation depth.
Definition: Sema.h:7442
bool resolveUses(Module *Mod, bool Complain)
Resolve all of the unresolved uses in the given module.
Definition: ModuleMap.cpp:1271
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3168
IdentifierInfo * getFloat128Identifier() const
Definition: Sema.cpp:2085
bool DisableTypoCorrection
Tracks whether we are in a context where typo correction is disabled.
Definition: Sema.h:7735
Retains information about a function, method, or block that is currently being parsed.
Definition: ScopeInfo.h:96
std::string getOpenCLExtensionsFromTypeExtMap(FunctionType *FT)
Check if a function type FT associates with any extensions present in OpenCLTypeExtMap and if so retu...
Definition: Sema.cpp:2150
RAII object that enters a new expression evaluation context.
Definition: Sema.h:11067
Compiling a C++ modules TS module interface unit.
Definition: LangOptions.h:84
Represents a variable declaration or definition.
Definition: Decl.h:812
PartialDiagnostic PDiag(unsigned DiagID=0)
Build a partial diagnostic.
Definition: SemaInternal.h:24
QualType getReturnType() const
Definition: Decl.h:2301
DiagnosticsEngine & Diags
Definition: Sema.h:376
virtual void ReadWeakUndeclaredIdentifiers(SmallVectorImpl< std::pair< IdentifierInfo *, WeakInfo > > &WI)
Read the set of weak, undeclared identifiers known to the external Sema source.
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6768
PrintingPolicy getPrintingPolicy() const
Retrieve a suitable printing policy for diagnostics.
Definition: Sema.h:2267
void enableSupportedCore(LangOptions LO)
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:138
NamedDecl * getUnderlyingDecl()
Looks through UsingDecls and ObjCCompatibleAliasDecls for the underlying named decl.
Definition: Decl.h:431
SmallVector< CXXRecordDecl *, 4 > DelayedDllExportClasses
Definition: Sema.h:10969
llvm::MapVector< NamedDecl *, SourceLocation > UndefinedButUsed
UndefinedInternals - all the used, undefined objects which require a definition in this translation u...
Definition: Sema.h:1185
CharacteristicKind
Indicates whether a file or directory holds normal user code, system code, or system code which is im...
Definition: SourceManager.h:77
ModuleMap & getModuleMap()
Retrieve the module map.
Definition: HeaderSearch.h:659
bool isInvalidDecl() const
Definition: DeclBase.h:545
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:37
ObjCMethodDecl * ValueWithBytesObjCTypeMethod
The declaration of the valueWithBytes:objCType: method.
Definition: Sema.h:937
This interface provides a way to observe the actions of the preprocessor as it does its thing...
Definition: PPCallbacks.h:35
OpenCLOptions & getOpenCLOptions()
Definition: Sema.h:1287
Defines the clang::Expr interface and subclasses for C++ expressions.
ObjCInterfaceDecl * NSDictionaryDecl
The declaration of the Objective-C NSDictionary class.
Definition: Sema.h:946
const llvm::MapVector< FieldDecl *, DeleteLocs > & getMismatchingDeleteExpressions() const
Retrieves list of suspicious delete-expressions that will be checked at the end of translation unit...
Definition: Sema.cpp:2108
iterator begin(Source *source, bool LocalOnly=false)
iterator begin(DeclarationName Name)
begin - Returns an iterator for decls with the name &#39;Name&#39;.
ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, MultiExprArg ArgExprs, SourceLocation RParenLoc, Expr *ExecConfig=nullptr, bool IsExecConfig=false)
ActOnCallExpr - Handle a call to Fn with the specified array of arguments.
Definition: SemaExpr.cpp:5520
void threadSafetyCleanup(BeforeSet *Cache)
CanQualType OCLSamplerTy
Definition: ASTContext.h:1052
void CheckDelayedMemberExceptionSpecs()
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:269
Represents a struct/union/class.
Definition: Decl.h:3592
void FreeVisContext()
FreeVisContext - Deallocate and null out VisContext.
Definition: SemaAttr.cpp:769
An iterator over the friend declarations of a class.
Definition: DeclFriend.h:187
This is the private module fragment within some C++ module.
Definition: Module.h:84
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:297
TypedefDecl * getObjCIdDecl() const
Retrieve the typedef corresponding to the predefined id type in Objective-C.
One of these records is kept for each identifier that is lexed.
std::unique_ptr< NSAPI > NSAPIObj
Caches identifiers/selectors for NSFoundation APIs.
Definition: Sema.h:910
LocalInstantiationScope * CurrentInstantiationScope
The current instantiation scope used to store local variables.
Definition: Sema.h:7731
virtual void ReadUnusedLocalTypedefNameCandidates(llvm::SmallSetVector< const TypedefNameDecl *, 4 > &Decls)
Read the set of potentially unused typedefs known to the source.
bool doesNotEscape() const
Definition: Decl.h:4008
SmallVector< std::pair< FunctionDecl *, FunctionDecl * >, 2 > DelayedEquivalentExceptionSpecChecks
All the function redeclarations seen during a class definition that had their exception spec checks d...
Definition: Sema.h:683
sema::FunctionScopeInfo * getEnclosingFunction() const
Definition: Sema.cpp:1758
bool resolveConflicts(Module *Mod, bool Complain)
Resolve all of the unresolved conflicts in the given module.
Definition: ModuleMap.cpp:1284
sema::LambdaScopeInfo * getCurGenericLambda()
Retrieve the current generic lambda info, if any.
Definition: Sema.cpp:1794
unsigned getCurrentDiagID() const
Definition: Diagnostic.h:990
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:154
bool inTemplateInstantiation() const
Determine whether we are currently performing template instantiation.
Definition: Sema.h:7635
SourceLocation getTypeSpecTypeLoc() const
Definition: DeclSpec.h:514
sema::BlockScopeInfo * getCurBlock()
Retrieve the current block, if any.
Definition: Sema.cpp:1743
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Stmt.cpp:263
void setCurrentOpenCLExtensionForType(QualType T)
Set current OpenCL extensions for a type which can only be used when these OpenCL extensions are enab...
Definition: Sema.cpp:2131
Represents a member of a struct/union/class.
Definition: Decl.h:2578
void erase(iterator From, iterator To)
The current expression is potentially evaluated at run time, which means that code may be generated t...
ImplicitParamDecl * getContextParam() const
Retrieve the parameter containing captured variables.
Definition: Decl.h:4115
void setEscapingByref()
Definition: Decl.h:1419
threadSafety::BeforeSet * ThreadSafetyDeclCache
Definition: Sema.h:7750
ObjCInterfaceDecl * NSValueDecl
The declaration of the Objective-C NSValue class.
Definition: Sema.h:916
void ActOnEndOfTranslationUnit()
ActOnEndOfTranslationUnit - This is called at the very end of the translation unit when EOF is reache...
Definition: Sema.cpp:918
CanQualType OCLEventTy
Definition: ASTContext.h:1052
The iterator over UnresolvedSets.
Definition: UnresolvedSet.h:31
virtual SourceRange getSourceRange() const LLVM_READONLY
Source range that this declaration covers.
Definition: DeclBase.h:409
llvm::SmallPtrSet< const BlockDecl *, 1 > Blocks
The set of blocks that are introduced in this function.
Definition: ScopeInfo.h:206
void setFunctionHasBranchIntoScope()
Definition: Sema.cpp:1728
Represents a C++ member access expression for which lookup produced a set of overloaded functions...
Definition: ExprCXX.h:3661
void setPrintingPolicy(const clang::PrintingPolicy &Policy)
Definition: ASTContext.h:657
bool DefineUsedVTables()
Define all of the vtables that have been used in this translation unit and reference any virtual memb...
bool isOpenCLDisabledDecl(Decl *FD)
Definition: Sema.cpp:2171
CanQualType OCLReserveIDTy
Definition: ASTContext.h:1053
const LangOptions & getLangOpts() const
Definition: Preprocessor.h:900
Describes a module or submodule.
Definition: Module.h:64
llvm::BumpPtrAllocator BumpAlloc
Definition: Sema.h:1162
IdentifierTable & Idents
Definition: ASTContext.h:565
static void noteOverloads(Sema &S, const UnresolvedSetImpl &Overloads, const SourceLocation FinalNoteLoc)
Give notes for a set of overloads.
Definition: Sema.cpp:1965
bool AccessCheckingSFINAE
When true, access checking violations are treated as SFINAE failures rather than hard errors...
Definition: Sema.h:6214
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:109
static InitializedEntity InitializeBlock(SourceLocation BlockVarLoc, QualType Type, bool NRVO)
Values of this type can be null.
iterator end()
end - Returns an iterator that has &#39;finished&#39;.
DiagnosticErrorTrap ErrorTrap
Used to determine if errors occurred in this function or block.
Definition: ScopeInfo.h:176
An abstract interface that should be implemented by clients that read ASTs and then require further s...
Definition: SemaConsumer.h:25
DeviceDiagBuilder CUDADiagIfDeviceCode(SourceLocation Loc, unsigned DiagID)
Creates a DeviceDiagBuilder that emits the diagnostic if the current context is "used as device code"...
Definition: SemaCUDA.cpp:623
unsigned TyposCorrected
The number of typos corrected by CorrectTypo.
Definition: Sema.h:7738
VarDecl * getActingDefinition()
Get the tentative definition that acts as the real definition in a TU.
Definition: Decl.cpp:2128
static bool MethodsAndNestedClassesComplete(const CXXRecordDecl *RD, RecordCompleteMap &MNCComplete)
Returns true, if all methods and nested classes of the given CXXRecordDecl are defined in this transl...
Definition: Sema.cpp:759
bool findMacroSpelling(SourceLocation &loc, StringRef name)
Looks through the macro-expansion chain for the given location, looking for a macro expansion with th...
Definition: Sema.cpp:1552
PtrTy get() const
Definition: Ownership.h:170
DeviceDiagBuilder targetDiag(SourceLocation Loc, unsigned DiagID)
Definition: Sema.cpp:1538
ObjCMethodDecl * getCurMethodDecl()
getCurMethodDecl - If inside of a method body, this returns a pointer to the method decl for the meth...
Definition: Sema.cpp:1244
bool isReferenced() const
Whether any declaration of this entity was referenced.
Definition: DeclBase.cpp:421
HeaderSearch & getHeaderSearchInfo() const
Definition: Preprocessor.h:905
const SourceLocation & getLocation() const
Definition: Diagnostic.h:1328
bool checkOpenCLDisabledTypeDeclSpec(const DeclSpec &DS, QualType T)
Check if type T corresponding to declaration specifier DS is disabled due to required OpenCL extensio...
Definition: Sema.cpp:2201
TypedefDecl * getObjCSelDecl() const
Retrieve the typedef corresponding to the predefined &#39;SEL&#39; type in Objective-C.
ExprValueKind getValueKind() const
getValueKind - The value kind that this expression produces.
Definition: Expr.h:407
std::pair< SourceLocation, bool > DeleteExprLoc
Delete-expressions to be analyzed at the end of translation unit.
Definition: Sema.h:630
SourceLocation getExpansionLoc(SourceLocation Loc) const
Given a SourceLocation object Loc, return the expansion location referenced by the ID...
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:653
void PerformPendingInstantiations(bool LocalOnly=false)
Performs template instantiation for all implicit template instantiations we have seen until this poin...
A set of unresolved declarations.
Definition: UnresolvedSet.h:60
void IssueWarnings(Policy P, FunctionScopeInfo *fscope, const Decl *D, const BlockExpr *blkExpr)
void CheckDelegatingCtorCycles()
CheckedConversionKind
The kind of conversion being performed.
Definition: Sema.h:9558
friend_iterator friend_end() const
Definition: DeclFriend.h:243
~ExternalSemaSource() override
Definition: Sema.cpp:1830
Values of this type can never be null.
void addExternalSource(ExternalSemaSource *E)
Registers an external source.
Definition: Sema.cpp:419
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:6084
static const unsigned NumNSNumberLiteralMethods
Definition: NSAPI.h:194
Emit no diagnostics.
Definition: Sema.h:10248
submodule_iterator submodule_end()
Definition: Module.h:564
void PrintStats() const
Print out statistics about the semantic analysis.
Definition: Sema.cpp:436
void emitAndClearUnusedLocalTypedefWarnings()
Definition: Sema.cpp:832
SourceLocation getCurrentDiagLoc() const
Definition: Diagnostic.h:992
virtual ASTMutationListener * GetASTMutationListener()
If the consumer is interested in entities getting modified after their initial creation, it should return a pointer to an ASTMutationListener here.
Definition: ASTConsumer.h:123
Preprocessor & PP
Definition: Sema.h:373
ObjCInterfaceDecl * NSNumberDecl
The declaration of the Objective-C NSNumber class.
Definition: Sema.h:913
virtual void ReadKnownNamespaces(SmallVectorImpl< NamespaceDecl *> &Namespaces)
Load the set of namespaces that are known to the external source, which will be used during typo corr...
Definition: Sema.cpp:1835
const LangOptions & getLangOpts() const
Definition: Sema.h:1286
bool isTypeDependent() const
isTypeDependent - Determines whether this expression is type-dependent (C++ [temp.dep.expr]), which means that its type could change from one template instantiation to the next.
Definition: Expr.h:169
sema::AnalysisBasedWarnings AnalysisWarnings
Worker object for performing CFG-based warnings.
Definition: Sema.h:7749
Represents the body of a CapturedStmt, and serves as its DeclContext.
Definition: Decl.h:4050
NamespaceDecl * StdExperimentalNamespaceCache
The C++ "std::experimental" namespace, where the experimental parts of the standard library resides...
Definition: Sema.h:893
ObjCMethodDecl * StringWithUTF8StringMethod
The declaration of the stringWithUTF8String: method.
Definition: Sema.h:934
void DiagnoseNonDefaultPragmaPack(PragmaPackDiagnoseKind Kind, SourceLocation IncludeLoc)
Definition: SemaAttr.cpp:215
const LangOptions & LangOpts
Definition: Sema.h:372
bool checkOpenCLDisabledDecl(const NamedDecl &D, const Expr &E)
Check if declaration D used by expression E is disabled due to required OpenCL extensions being disab...
Definition: Sema.cpp:2225
Contains information about the compound statement currently being parsed.
Definition: ScopeInfo.h:66
bool EmitCurrentDiagnostic(bool Force=false)
Emit the current diagnostic and clear the diagnostic state.
Definition: Diagnostic.cpp:498
DiagnosticsEngine & getDiagnostics() const
Definition: Sema.h:1290
static bool IsCallableWithAppend(Expr *E)
Determine whether the given expression can be called by just putting parentheses after it...
Definition: Sema.cpp:2015
bool hasAttr() const
Definition: DeclBase.h:534
bool isExternalFormalLinkage(Linkage L)
Definition: Linkage.h:102
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:328
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:1044
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1635
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3699
TentativeDefinitionsType TentativeDefinitions
All the tentative definitions encountered in the TU.
Definition: Sema.h:653
Retains information about a captured region.
Definition: ScopeInfo.h:736
void PushCompoundScope(bool IsStmtExpr)
Definition: Sema.cpp:1711
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:688
CastKind
CastKind - The kind of operation required for a conversion.
static ImplicitCastExpr * Create(const ASTContext &Context, QualType T, CastKind Kind, Expr *Operand, const CXXCastPath *BasePath, ExprValueKind Cat)
Definition: Expr.cpp:1847
void PopCompoundScope()
Definition: Sema.cpp:1715
TypedefDecl * getBuiltinMSVaListDecl() const
Retrieve the C type declaration corresponding to the predefined __builtin_ms_va_list type...
virtual void ReadMismatchingDeleteExpressions(llvm::MapVector< FieldDecl *, llvm::SmallVector< std::pair< SourceLocation, bool >, 4 >> &)
Definition: Sema.cpp:1842
void setFunctionHasBranchProtectedScope()
Definition: Sema.cpp:1733
bool isEnabled(llvm::StringRef Ext) const
Definition: OpenCLOptions.h:39
Scope * getCurScope() const
Retrieve the parser&#39;s current scope.
Definition: Sema.h:10934
unsigned Offset
Definition: Format.cpp:1709
TUFragmentKind
Definition: Sema.h:1389
CommentOptions CommentOpts
Options for parsing comments.
Definition: LangOptions.h:235
SmallVector< PendingImplicitInstantiation, 1 > LateParsedInstantiations
Queue of implicit template instantiations that cannot be performed eagerly.
Definition: Sema.h:7768
Retains information about a block that is currently being parsed.
Definition: ScopeInfo.h:710
bool isCodeCompletionEnabled() const
Determine if we are performing code completion.
Any normal C comment.
An abstract interface that should be implemented by external AST sources that also provide informatio...
Represents 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
static bool ShouldRemoveFromUnused(Sema *SemaRef, const DeclaratorDecl *D)
Used to prune the decls of Sema&#39;s UnusedFileScopedDecls vector.
Definition: Sema.cpp:558
This represents one expression.
Definition: Expr.h:108
void setOpenCLExtensionForDecl(Decl *FD, llvm::StringRef Exts)
Set OpenCL extensions for a declaration which can only be used when these OpenCL extensions are enabl...
Definition: Sema.cpp:2122
Show just the "best" overload candidates.
static SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset, const SourceManager &SM, const LangOptions &LangOpts)
Computes the source location just past the end of the token at this source location.
Definition: Lexer.cpp:770
ExprValueKind
The categorization of expression values, currently following the C++11 scheme.
Definition: Specifiers.h:106
bool isAlmostTrailingComment() const LLVM_READONLY
Returns true if it is a probable typo:
int Id
Definition: ASTDiff.cpp:190
bool isInSystemHeader(SourceLocation Loc) const
Returns if a SourceLocation is in a system header.
llvm::SmallPtrSet< const Decl *, 4 > ParsingInitForAutoVars
ParsingInitForAutoVars - a set of declarations with auto types for which we are currently parsing the...
Definition: Sema.h:643
const FileEntry * getFileEntryForID(FileID FID) const
Returns the FileEntry record for the provided FileID.
static FindResult find(Expr *E)
Finds the overloaded expression in the given expression E of OverloadTy.
Definition: ExprCXX.h:2794
TypedefDecl * buildImplicitTypedef(QualType T, StringRef Name) const
Create a new implicit TU-level typedef declaration.
void addImplicitTypedef(StringRef Name, QualType T)
Definition: Sema.cpp:191
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:6831
BlockExpr - Adaptor class for mixing a BlockDecl with expressions.
Definition: Expr.h:5389
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2713
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:131
bool InNonInstantiationSFINAEContext
Whether we are in a SFINAE context that is not associated with template instantiation.
Definition: Sema.h:7433
Defines the clang::Preprocessor interface.
bool isNullPtrType() const
Definition: Type.h:6585
llvm::MapVector< IdentifierInfo *, WeakInfo > WeakUndeclaredIdentifiers
WeakUndeclaredIdentifiers - Identifiers contained in #pragma weak before declared.
Definition: Sema.h:854
Defines the classes clang::DelayedDiagnostic and clang::AccessedEntity.
Not compiling a module interface at all.
Definition: LangOptions.h:75
void setBlockVarCopyInit(const VarDecl *VD, Expr *CopyExpr, bool CanThrow)
Set the copy inialization expression of a block var decl.
DeclContext * getDeclContext()
Definition: DeclBase.h:430
void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP=nullptr, const Decl *D=nullptr, const BlockExpr *blkExpr=nullptr)
Definition: Sema.cpp:1684
bool resolveExports(Module *Mod, bool Complain)
Resolve all of the unresolved exports in the given module.
Definition: ModuleMap.cpp:1258
An abstract interface that should be implemented by listeners that want to be notified when an AST en...
TypedefDecl * getInt128Decl() const
Retrieve the declaration for the 128-bit signed integer type.
ScalarTypeKind getScalarTypeKind() const
Given that this is a scalar type, classify it.
Definition: Type.cpp:1989
decls_iterator decls_begin() const
Definition: ExprCXX.h:2826
bool RequireCompleteType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Ensure that the type T is a complete type.
Definition: SemaType.cpp:7680
int Depth
Definition: ASTDiff.cpp:190
const MacroInfo * getMacroInfo(const IdentifierInfo *II) const
QualType getType() const
Definition: Expr.h:130
void Clear()
Clear out the current diagnostic.
Definition: Diagnostic.h:882
SmallVector< sema::FunctionScopeInfo *, 4 > FunctionScopes
Stack containing information about each of the nested function, block, and method scopes that are cur...
Definition: Sema.h:602
PartialDiagnostic::StorageAllocator & getDiagAllocator()
Definition: ASTContext.h:685
QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, ArrayType::ArraySizeModifier ASM, unsigned IndexTypeQuals) const
Return the unique reference to the type for a constant array of the specified element type...
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1761
bool isExternallyVisible(Linkage L)
Definition: Linkage.h:85
bool isInvalid() const
Definition: Ownership.h:166
SourceLocation getEnd() const
Preprocessor & getPreprocessor() const
Definition: Sema.h:1292
TypedefDecl * getBuiltinVaListDecl() const
Retrieve the C type declaration corresponding to the predefined __builtin_va_list type...
ObjCMethodDecl * ArrayWithObjectsMethod
The declaration of the arrayWithObjects:count: method.
Definition: Sema.h:943
void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext=true)
Add this decl to the scope shadowed decl chains.
Definition: SemaDecl.cpp:1347
bool isUsable() const
Definition: Ownership.h:167
sema::LambdaScopeInfo * PushLambdaScope()
Definition: Sema.cpp:1616
The result type of a method or function.
NamedDecl * LookupSingleName(Scope *S, DeclarationName Name, SourceLocation Loc, LookupNameKind NameKind, RedeclarationKind Redecl=NotForRedeclaration)
Look up a name, looking for a single declaration.
void DiagnoseUnterminatedPragmaPack()
Definition: SemaAttr.cpp:249
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:704
const SourceManager & SM
Definition: Format.cpp:1568
OverloadsShown getShowOverloads() const
Definition: Diagnostic.h:661
unsigned NumSFINAEErrors
The number of SFINAE diagnostics that have been trapped.
Definition: Sema.h:1165
llvm::DenseMap< const CXXRecordDecl *, bool > RecordCompleteMap
Definition: Sema.cpp:752
An abstract interface that should be implemented by external AST sources that also provide informatio...
bool isConstQualified() const
Determine whether this type is const-qualified.
Definition: Type.h:6143
unsigned Bool
Whether we can use &#39;bool&#39; rather than &#39;_Bool&#39; (even if the language doesn&#39;t actually have &#39;bool&#39;...
bool isStructureOrClassType() const
Definition: Type.cpp:461
void PushBlockScope(Scope *BlockScope, BlockDecl *Block)
Definition: Sema.cpp:1611
CanQualType OverloadTy
Definition: ASTContext.h:1044
void Emit(const DiagnosticBuilder &DB) const
#define false
Definition: stdbool.h:17
RecordDecl * CXXTypeInfoDecl
The C++ "type_info" declaration, which is defined in <typeinfo>.
Definition: Sema.h:904
Kind
A reference to an overloaded function set, either an UnresolvedLookupExpr or an UnresolvedMemberExpr...
Definition: ExprCXX.h:2734
QualType getCanonicalType() const
Definition: Type.h:6123
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:153
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:217
Encodes a location in the source.
TypedefDecl * getUInt128Decl() const
Retrieve the declaration for the 128-bit unsigned integer type.
QualType getReturnType() const
Definition: Type.h:3625
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
void setCurrentOpenCLExtensionForDecl(Decl *FD)
Set current OpenCL extensions for a declaration which can only be used when these OpenCL extensions a...
Definition: Sema.cpp:2137
Diagnostic builder for CUDA/OpenMP devices errors which may or may not be deferred.
Definition: Sema.h:10244
StringRef getName() const
Definition: FileManager.h:83
QualType getUIntPtrType() const
Return a type compatible with "uintptr_t" (C99 7.18.1.4), as defined by the target.
decl_iterator decls_begin() const
Definition: DeclBase.cpp:1389
bool makeUnavailableInSystemHeader(SourceLocation loc, UnavailableAttr::ImplicitReason reason)
makeUnavailableInSystemHeader - There is an error in the current context.
Definition: Sema.cpp:389
Cached information about one file (either on disk or in the virtual file system). ...
Definition: FileManager.h:59
ObjCInterfaceDecl * getObjCProtocolDecl() const
Retrieve the Objective-C class declaration corresponding to the predefined Protocol class...
std::string getOpenCLExtensionsFromDeclExtMap(FunctionDecl *FD)
Check if a function declaration FD associates with any extensions present in OpenCLDeclExtMap and if ...
Definition: Sema.cpp:2143
bool isExternalWithNoLinkageType(ValueDecl *VD)
Determine if VD, which must be a variable or function, is an external symbol that nonetheless can&#39;t b...
Definition: Sema.cpp:627
ClassTemplateDecl * StdInitializerList
The C++ "std::initializer_list" template, which is defined in <initializer_list>. ...
Definition: Sema.h:897
std::pair< SourceLocation, PartialDiagnostic > PartialDiagnosticAt
A partial diagnostic along with the source location where this diagnostic occurs. ...
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2048
void DiagnoseUseOfUnimplementedSelectors()
CanQualType FloatTy
Definition: ASTContext.h:1027
DeclGroupPtrTy ActOnGlobalModuleFragmentDecl(SourceLocation ModuleLoc)
The parser has processed a global-module-fragment declaration that begins the definition of the globa...
Definition: SemaModule.cpp:58
This is a fragment of the global module within some C++ module.
Definition: Module.h:81
static void emitCallStackNotes(Sema &S, FunctionDecl *FD)
Definition: Sema.cpp:1366
CanQualType VoidTy
Definition: ASTContext.h:1015
void markKnownEmitted(Sema &S, FunctionDecl *OrigCaller, FunctionDecl *OrigCallee, SourceLocation OrigLoc, const llvm::function_ref< bool(Sema &, FunctionDecl *)> IsKnownEmitted)
Indicate that this function (and thus everything it transtively calls) will be codegen&#39;ed, and emit any deferred diagnostics on this function and its (transitive) callees.
Definition: Sema.cpp:1476
void addDecl(NamedDecl *D)
Definition: UnresolvedSet.h:88
bool isInMainFile(SourceLocation Loc) const
Returns whether the PresumedLoc for a given SourceLocation is in the main file.
void SetArgToStringFn(ArgToStringFnTy Fn, void *Cookie)
Definition: Diagnostic.h:793
virtual void ReadUndefinedButUsed(llvm::MapVector< NamedDecl *, SourceLocation > &Undefined)
Load the set of used but not defined functions or variables with internal linkage, or used but not defined internal functions.
Definition: Sema.cpp:1839
void EmitCurrentDiagnostic(unsigned DiagID)
Cause the active diagnostic on the DiagosticsEngine to be emitted.
Definition: Sema.cpp:1258
This declaration is only a declaration.
Definition: Decl.h:1146
void addSupport(const OpenCLOptions &Opts)
ImplicitCastExpr - Allows us to explicitly represent implicit type conversions, which have no direct ...
Definition: Expr.h:3158
The diagnostic should be suppressed entirely.
static bool IsRecordFullyDefined(const CXXRecordDecl *RD, RecordCompleteMap &RecordsComplete, RecordCompleteMap &MNCComplete)
Returns true, if the given CXXRecordDecl is fully defined in this translation unit, i.e.
Definition: Sema.cpp:801
friend_iterator friend_begin() const
Definition: DeclFriend.h:239
bool isUsed(bool CheckUsedAttr=true) const
Whether any (re-)declaration of the entity was used, meaning that a definition is required...
Definition: DeclBase.cpp:396
std::unique_ptr< CXXFieldCollector > FieldCollector
FieldCollector - Collects CXXFieldDecls during parsing of C++ classes.
Definition: Sema.h:614
Create a deferred diagnostic, which is emitted only if the function it&#39;s attached to is codegen&#39;ed...
Definition: Sema.h:10258
static bool isFunctionOrVarDeclExternC(NamedDecl *ND)
Definition: Sema.cpp:619
sema::CapturedRegionScopeInfo * getCurCapturedRegion()
Retrieve the current captured region, if any.
Definition: Sema.cpp:2100
static bool isBuiltinNote(unsigned DiagID)
Determine whether the given built-in diagnostic ID is a Note.
void ActOnStartOfTranslationUnit()
This is called before the very first declaration in the translation unit is parsed.
Definition: Sema.cpp:848
ASTConsumer & getASTConsumer() const
Definition: Sema.h:1294
void setLastDiagnosticIgnored(bool Ignored=true)
Pretend that the last diagnostic issued was ignored, so any subsequent notes will be suppressed...
Definition: Diagnostic.h:669
void setOpenCLExtensionForType(QualType T, llvm::StringRef Exts)
Set OpenCL extensions for a type which can only be used when these OpenCL extensions are enabled...
Definition: Sema.cpp:2112
decl_iterator - Iterates through the declarations stored within this context.
Definition: DeclBase.h:1967
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2915
Abstract interface for a consumer of code-completion information.
An opaque identifier used by SourceManager which refers to a source file (MemoryBuffer) along with it...
Dataflow Directional Tag Classes.
LateTemplateParserCleanupCB * LateTemplateParserCleanup
Definition: Sema.h:704
Level getDiagnosticLevel(unsigned DiagID, SourceLocation Loc) const
Based on the way the client configured the DiagnosticsEngine object, classify the specified diagnosti...
Definition: Diagnostic.h:835
bool isValid() const
Return true if this is a valid SourceLocation object.
int ArgumentPackSubstitutionIndex
The current index into pack expansion arguments that will be used for substitution of parameter packs...
Definition: Sema.h:7466
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1266
ObjCMethodDecl * NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods]
The Objective-C NSNumber methods used to create NSNumber literals.
Definition: Sema.h:925
static void checkEscapingByref(VarDecl *VD, Sema &S)
Definition: Sema.cpp:1633
ArrayRef< Capture > captures() const
Definition: Decl.h:3984
ASTMutationListener * getASTMutationListener() const
Definition: Sema.cpp:410
ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, ExprValueKind VK=VK_RValue, const CXXCastPath *BasePath=nullptr, CheckedConversionKind CCK=CCK_ImplicitConversion)
ImpCastExprToType - If Expr is not of type &#39;Type&#39;, insert an implicit cast.
Definition: Sema.cpp:486
void diagnoseZeroToNullptrConversion(CastKind Kind, const Expr *E)
Warn when implicitly casting 0 to nullptr.
Definition: Sema.cpp:458
void RecordParsingTemplateParameterDepth(unsigned Depth)
This is used to inform Sema what the current TemplateParameterDepth is during Parsing.
Definition: Sema.cpp:1622
bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const
Definition: SemaDecl.cpp:1560
SourceLocation getIncludeLoc(FileID FID) const
Returns the include location if FID is a #include&#39;d file otherwise it returns an invalid location...
This is a scope that corresponds to the template parameters of a C++ template.
Definition: Scope.h:77
ClassTemplateDecl * StdCoroutineTraitsCache
The C++ "std::coroutine_traits" template, which is defined in <coroutine_traits>
Definition: Sema.h:901
FileID getMainFileID() const
Returns the FileID of the main source file.
bool GlobalNewDeleteDeclared
A flag to remember whether the implicit forms of operator new and delete have been declared...
Definition: Sema.h:959
The name of a declaration.
bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, bool ForceComplain=false, bool(*IsPlausibleResult)(QualType)=nullptr)
Try to recover by turning the given expression into a call.
Definition: Sema.cpp:2038
A set of unresolved declarations.
bool hasUnrecoverableErrorOccurred() const
Determine whether any unrecoverable errors have occurred since this object instance was created...
Definition: Diagnostic.h:1017
Emit the diagnostic immediately (i.e., behave like Sema::Diag()).
Definition: Sema.h:10250
IdentifierResolver IdResolver
Definition: Sema.h:873
Optional< sema::TemplateDeductionInfo * > isSFINAEContext() const
Determines whether we are currently in a context where template argument substitution failures are no...
bool isEscapingByref() const
Indicates the capture is a __block variable that is captured by a block that can potentially escape (...
Definition: Decl.cpp:2387
bool IsHeaderFile
Indicates whether the front-end is explicitly told that the input is a header file (i...
Definition: LangOptions.h:250
static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy)
ScalarTypeToBooleanCastKind - Returns the cast kind corresponding to the conversion from scalar type ...
Definition: Sema.cpp:541
DeviceDiagBuilder diagIfOpenMPDeviceCode(SourceLocation Loc, unsigned DiagID)
Creates a DeviceDiagBuilder that emits the diagnostic if the current context is "used as device code"...
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any...
Definition: ASTContext.h:1082
Abstract interface for a module loader.
Definition: ModuleLoader.h:73
NamedDecl * getCurFunctionOrMethodDecl()
getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method or C function we&#39;re in...
Definition: Sema.cpp:1251
std::string getOpenCLExtensionsFromExtMap(T *FT, MapT &Map)
Find an extension in an appropriate extension map and return its name.
Definition: Sema.cpp:2158
bool hasAnyUnrecoverableErrorsInThisFunction() const
Determine whether any errors occurred within this function/method/ block.
Definition: Sema.cpp:1724
Expr * IgnoreParenImpCasts() LLVM_READONLY
Skip past any parentheses and implicit casts which might surround this expression until reaching a fi...
Definition: Expr.cpp:2723
bool isMacroID() const
llvm::MapVector< FieldDecl *, DeleteLocs > DeleteExprs
Definition: Sema.h:632
void DiagnoseUnterminatedPragmaAttribute()
Definition: SemaAttr.cpp:712
Encapsulates the data about a macro definition (e.g.
Definition: MacroInfo.h:39
FileID getFileID(SourceLocation SpellingLoc) const
Return the FileID for a SourceLocation.
Expr * IgnoreImplicit() LLVM_READONLY
Skip past any implicit AST nodes which might surround this expression until reaching a fixed point...
Definition: Expr.cpp:2715
DeclarationName VAListTagName
VAListTagName - The declaration name corresponding to __va_list_tag.
Definition: Sema.h:394
void FormatASTNodeDiagnosticArgument(DiagnosticsEngine::ArgumentKind Kind, intptr_t Val, StringRef Modifier, StringRef Argument, ArrayRef< DiagnosticsEngine::ArgumentValue > PrevArgs, SmallVectorImpl< char > &Output, void *Cookie, ArrayRef< intptr_t > QualTypeVals)
DiagnosticsEngine argument formatting function for diagnostics that involve AST nodes.
CanQualType UnsignedLongTy
Definition: ASTContext.h:1025
FunctionDecl * getCurFunctionDecl()
getCurFunctionDecl - If inside of a function body, this returns a pointer to the function decl for th...
Definition: Sema.cpp:1239
static void markEscapingByrefs(const FunctionScopeInfo &FSI, Sema &S)
Definition: Sema.cpp:1658
void * OpaqueParser
Definition: Sema.h:705
ExtVectorType - Extended vector type.
Definition: Type.h:3299
MaterializeTemporaryExpr * CreateMaterializeTemporaryExpr(QualType T, Expr *Temporary, bool BoundToLvalueReference)
Definition: SemaInit.cpp:7288
CanQualType BoundMemberTy
Definition: ASTContext.h:1044
SmallVector< ExpressionEvaluationContextRecord, 8 > ExprEvalContexts
A stack of expression evaluation contexts.
Definition: Sema.h:1091
void addComment(const RawComment &RC)
Definition: ASTContext.h:802
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:91
ObjCInterfaceDecl * NSArrayDecl
The declaration of the Objective-C NSArray class.
Definition: Sema.h:940
Implements a partial diagnostic that can be emitted anwyhere in a DiagnosticBuilder stream...
Optional< NullabilityKind > getNullability(const ASTContext &context) const
Determine the nullability of the given type.
Definition: Type.cpp:3775
The "class" keyword.
Definition: Type.h:5054
virtual bool hasInt128Type() const
Determine whether the __int128 type is supported on this target.
Definition: TargetInfo.h:520
std::unique_ptr< sema::FunctionScopeInfo > PreallocatedFunctionScope
Definition: Sema.h:598
static bool IsKnownEmitted(Sema &S, FunctionDecl *FD)
Definition: SemaCUDA.cpp:590
uint64_t getTypeSize(QualType T) const
Return the size of the specified (complete) type T, in bits.
Definition: ASTContext.h:2072
This is a scope that can contain a declaration.
Definition: Scope.h:59
SourceManager & getSourceManager()
Definition: ASTContext.h:661
The type-property cache.
Definition: Type.cpp:3527
void ActOnTranslationUnitScope(Scope *S)
Definition: Sema.cpp:70
Scope * getScopeForContext(DeclContext *Ctx)
Determines the active Scope associated with the given declaration context.
Definition: Sema.cpp:1580
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2266
llvm::DenseMap< CanonicalDeclPtr< FunctionDecl >, std::vector< PartialDiagnosticAt > > DeviceDeferredDiags
Diagnostics that are emitted only if we discover that the given function must be codegen&#39;ed.
Definition: Sema.h:10194
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
Expr * MaybeCreateExprWithCleanups(Expr *SubExpr)
MaybeCreateExprWithCleanups - If the current full-expression requires any cleanups, surround it with a ExprWithCleanups node.
ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, const VarDecl *NRVOCandidate, QualType ResultType, Expr *Value, bool AllowNRVO=true)
Perform the initialization of a potentially-movable value, which is the result of return value...
Definition: SemaStmt.cpp:3071
TranslationUnitDecl * getTranslationUnitDecl() const
Definition: ASTContext.h:1008
void setSuppressAllDiagnostics(bool Val=true)
Suppress all diagnostics, to silence the front end when we know that we don&#39;t want any more diagnosti...
Definition: Diagnostic.h:634
void * VisContext
VisContext - Manages the stack for #pragma GCC visibility.
Definition: Sema.h:546
Captures information about "declaration specifiers".
Definition: DeclSpec.h:227
sema::DelayedDiagnosticPool * getCurrentPool() const
Returns the current delayed-diagnostics pool.
Definition: Sema.h:741
static SFINAEResponse getDiagnosticSFINAEResponse(unsigned DiagID)
Determines whether the given built-in diagnostic ID is for an error that is suppressed if it occurs d...
Represents a C++ struct/union/class.
Definition: DeclCXX.h:299
CommentKind getKind() const LLVM_READONLY
void setFunctionHasIndirectGoto()
Definition: Sema.cpp:1738
Represents a C array with an unspecified size.
Definition: Type.h:2938
sema::FunctionScopeInfo * getCurFunction() const
Definition: Sema.h:1426
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:386
bool isRValue() const
Definition: Expr.h:252
TranslationUnitKind
Describes the kind of translation unit being processed.
Definition: LangOptions.h:361
static FixItHint CreateReplacement(CharSourceRange RemoveRange, StringRef Code)
Create a code modification hint that replaces the given source range with the given code string...
Definition: Diagnostic.h:128
void addAttr(Attr *A)
Definition: DeclBase.cpp:843
TypedefDecl * getObjCClassDecl() const
Retrieve the typedef declaration corresponding to the predefined Objective-C &#39;Class&#39; type...
SourceManager & getSourceManager() const
Definition: Sema.h:1291
SourceRange getSourceRange() const LLVM_READONLY
SourceLocation tokens are not useful in isolation - they are low level value objects created/interpre...
Definition: Stmt.cpp:251
bool tryExprAsCall(Expr &E, QualType &ZeroArgCallReturnTy, UnresolvedSetImpl &NonTemplateOverloads)
Figure out if an expression could be turned into a call.
Definition: Sema.cpp:1856
A little helper class (which is basically a smart pointer that forwards info from DiagnosticsEngine) ...
Definition: Diagnostic.h:1317
TranslationUnitKind TUKind
The kind of translation unit we are processing.
Definition: Sema.h:1160
Defines the clang::TargetInfo interface.
bool isIncrementalProcessingEnabled() const
Returns true if incremental processing is enabled.
ExprResult ExprError()
Definition: Ownership.h:279
The diagnostic should be reported.
CanQualType IntTy
Definition: ASTContext.h:1024
void ActOnComment(SourceRange Comment)
Definition: Sema.cpp:1803
virtual void ReadPendingInstantiations(SmallVectorImpl< std::pair< ValueDecl *, SourceLocation > > &Pending)
Read the set of pending instantiations known to the external Sema source.
decl_type * getMostRecentDecl()
Returns the most recent (re)declaration of this declaration.
Definition: Redeclarable.h:225
The diagnostic is an access-control diagnostic, which will be substitution failures in some contexts ...
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:1074
QualType getIntPtrType() const
Return a type compatible with "intptr_t" (C99 7.18.1.4), as defined by the target.
bool isIgnored(unsigned DiagID, SourceLocation Loc) const
Determine whether the diagnostic is known to be ignored.
Definition: Diagnostic.h:820
bool isUnion() const
Definition: Decl.h:3251
NamedDecl * getMostRecentDecl()
Definition: Decl.h:445
bool isDeleted() const
Whether this function has been deleted.
Definition: Decl.h:2135
DeclContext * getPrimaryContext()
getPrimaryContext - There may be many different declarations of the same entity (including forward de...
Definition: DeclBase.cpp:1173
SourceManager & SourceMgr
Definition: Sema.h:377
CapturedRegionKind
The different kinds of captured statement.
Definition: CapturedStmt.h:16
Annotates a diagnostic with some code that should be inserted, removed, or replaced to fix the proble...
Definition: Diagnostic.h:65
llvm::DenseMap< CanonicalDeclPtr< FunctionDecl >, FunctionDeclAndLoc > DeviceKnownEmittedFns
An inverse call graph, mapping known-emitted functions to one of their known-emitted callers (plus th...
Definition: Sema.h:10215
bool isInSystemMacro(SourceLocation loc) const
Returns whether Loc is expanded from a macro in a system header.
SmallVector< CompoundScopeInfo, 4 > CompoundScopes
The stack of currently active compound stamement scopes in the function.
Definition: ScopeInfo.h:203
QualType getType() const
Definition: Decl.h:647
An l-value expression is a reference to an object with independent storage.
Definition: Specifiers.h:113
virtual void CompleteTentativeDefinition(VarDecl *D)
CompleteTentativeDefinition - Callback invoked at the end of a translation unit to notify the consume...
Definition: ASTConsumer.h:103
A wrapper class around a pointer that always points to its canonical declaration. ...
Definition: Redeclarable.h:347
A trivial tuple used to represent a source range.
llvm::TinyPtrVector< VarDecl * > ByrefBlockVars
The set of __block variables that are introduced in this function.
Definition: ScopeInfo.h:209
ASTContext & Context
Definition: Sema.h:374
void diagnoseNullableToNonnullConversion(QualType DstType, QualType SrcType, SourceLocation Loc)
Warn if we&#39;re implicitly casting from a _Nullable pointer type to a _Nonnull one. ...
Definition: Sema.cpp:444
This represents a decl that may have a name.
Definition: Decl.h:248
void PushCapturedRegionScope(Scope *RegionScope, CapturedDecl *CD, RecordDecl *RD, CapturedRegionKind K)
Definition: Sema.cpp:2091
sema::LambdaScopeInfo * getCurLambda(bool IgnoreNonLambdaCapturingScope=false)
Retrieve the current lambda scope info, if any.
Definition: Sema.cpp:1770
CanQualType DoubleTy
Definition: ASTContext.h:1027
IdentifierInfo * getBoolName() const
Retrieve the identifier &#39;bool&#39;.
Definition: ASTContext.h:1709
void setType(QualType newType)
Definition: Decl.h:648
SourceLocation getBegin() const
const LangOptions & getLangOpts() const
Definition: ASTContext.h:706
static void checkUndefinedButUsed(Sema &S)
checkUndefinedButUsed - Check for undefined objects with internal linkage or that are inline...
Definition: Sema.cpp:691
decls_iterator decls_end() const
Definition: ExprCXX.h:2829
SmallVector< std::pair< CXXMethodDecl *, const FunctionProtoType * >, 2 > DelayedDefaultedMemberExceptionSpecs
All the members seen during a class definition which were both explicitly defaulted and had explicitl...
Definition: Sema.h:693
static void emitDeferredDiags(Sema &S, FunctionDecl *FD)
Definition: Sema.cpp:1380
void addPPCallbacks(std::unique_ptr< PPCallbacks > C)
Definition: Preprocessor.h:992
This class handles loading and caching of source files into memory.
void PrintContextStack()
Definition: Sema.h:7639
OpenCLOptions & getSupportedOpenCLOpts()
Get supported OpenCL extensions and optional core features.
Definition: TargetInfo.h:1303
bool getSuppressAllDiagnostics() const
Definition: Diagnostic.h:637
Declaration of a template function.
Definition: DeclTemplate.h:968
void PushFunctionScope()
Enter a new function scope.
Definition: Sema.cpp:1599
NamedDeclSetType UnusedPrivateFields
Set containing all declared private fields that are not used.
Definition: Sema.h:619
SourceLocation getLocation() const
Definition: DeclBase.h:421
llvm::DenseMap< CanonicalDeclPtr< FunctionDecl >, llvm::MapVector< CanonicalDeclPtr< FunctionDecl >, SourceLocation > > DeviceCallGraph
A partial call graph maintained during CUDA/OpenMP device code compilation to support deferred diagno...
Definition: Sema.h:10227
DeviceDiagBuilder CUDADiagIfHostCode(SourceLocation Loc, unsigned DiagID)
Creates a DeviceDiagBuilder that emits the diagnostic if the current context is "used as host code"...
Definition: SemaCUDA.cpp:650
bool isExternallyVisible() const
Definition: Decl.h:379
CanQualType OCLClkEventTy
Definition: ASTContext.h:1052
ObjCMethodDecl * DictionaryWithObjectsMethod
The declaration of the dictionaryWithObjects:forKeys:count: method.
Definition: Sema.h:949
Helper class that creates diagnostics with optional template instantiation stacks.
Definition: Sema.h:1316
Expr * IgnoreParens() LLVM_READONLY
Skip past any parentheses which might surround this expression until reaching a fixed point...
Definition: Expr.cpp:2719
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:123
CanQualType UnsignedIntTy
Definition: ASTContext.h:1025
decl_iterator decls_end() const
Definition: DeclBase.h:2012
bool hasExternalFormalLinkage() const
True if this decl has external linkage.
Definition: Decl.h:375
CanQualType getSizeType() const
Return the unique type for "size_t" (C99 7.17), defined in <stddef.h>.
static bool isExternC(const NamedDecl *ND)
Definition: Mangle.cpp:53
The translation unit is a module.
Definition: LangOptions.h:370