clang  7.0.0svn
ASTReaderDecl.cpp
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1 //===- ASTReaderDecl.cpp - Decl Deserialization ---------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the ASTReader::ReadDeclRecord method, which is the
11 // entrypoint for loading a decl.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "ASTCommon.h"
16 #include "ASTReaderInternals.h"
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/Attr.h"
19 #include "clang/AST/AttrIterator.h"
20 #include "clang/AST/Decl.h"
21 #include "clang/AST/DeclBase.h"
22 #include "clang/AST/DeclCXX.h"
23 #include "clang/AST/DeclFriend.h"
24 #include "clang/AST/DeclObjC.h"
25 #include "clang/AST/DeclOpenMP.h"
26 #include "clang/AST/DeclTemplate.h"
27 #include "clang/AST/DeclVisitor.h"
29 #include "clang/AST/Expr.h"
33 #include "clang/AST/Redeclarable.h"
34 #include "clang/AST/Stmt.h"
35 #include "clang/AST/TemplateBase.h"
36 #include "clang/AST/Type.h"
38 #include "clang/Basic/AttrKinds.h"
41 #include "clang/Basic/LLVM.h"
42 #include "clang/Basic/Lambda.h"
44 #include "clang/Basic/Linkage.h"
45 #include "clang/Basic/Module.h"
48 #include "clang/Basic/Specifiers.h"
55 #include "llvm/ADT/DenseMap.h"
56 #include "llvm/ADT/FoldingSet.h"
57 #include "llvm/ADT/STLExtras.h"
58 #include "llvm/ADT/SmallPtrSet.h"
59 #include "llvm/ADT/SmallVector.h"
60 #include "llvm/ADT/iterator_range.h"
61 #include "llvm/Bitcode/BitstreamReader.h"
62 #include "llvm/Support/Casting.h"
63 #include "llvm/Support/ErrorHandling.h"
64 #include "llvm/Support/SaveAndRestore.h"
65 #include <algorithm>
66 #include <cassert>
67 #include <cstdint>
68 #include <cstring>
69 #include <string>
70 #include <utility>
71 
72 using namespace clang;
73 using namespace serialization;
74 
75 //===----------------------------------------------------------------------===//
76 // Declaration deserialization
77 //===----------------------------------------------------------------------===//
78 
79 namespace clang {
80 
81  class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
82  ASTReader &Reader;
83  ASTRecordReader &Record;
84  ASTReader::RecordLocation Loc;
85  const DeclID ThisDeclID;
86  const SourceLocation ThisDeclLoc;
87 
89 
90  TypeID TypeIDForTypeDecl = 0;
91  unsigned AnonymousDeclNumber;
92  GlobalDeclID NamedDeclForTagDecl = 0;
93  IdentifierInfo *TypedefNameForLinkage = nullptr;
94 
95  bool HasPendingBody = false;
96 
97  ///A flag to carry the information for a decl from the entity is
98  /// used. We use it to delay the marking of the canonical decl as used until
99  /// the entire declaration is deserialized and merged.
100  bool IsDeclMarkedUsed = false;
101 
102  uint64_t GetCurrentCursorOffset();
103 
104  uint64_t ReadLocalOffset() {
105  uint64_t LocalOffset = Record.readInt();
106  assert(LocalOffset < Loc.Offset && "offset point after current record");
107  return LocalOffset ? Loc.Offset - LocalOffset : 0;
108  }
109 
110  uint64_t ReadGlobalOffset() {
111  uint64_t Local = ReadLocalOffset();
112  return Local ? Record.getGlobalBitOffset(Local) : 0;
113  }
114 
115  SourceLocation ReadSourceLocation() {
116  return Record.readSourceLocation();
117  }
118 
119  SourceRange ReadSourceRange() {
120  return Record.readSourceRange();
121  }
122 
123  TypeSourceInfo *GetTypeSourceInfo() {
124  return Record.getTypeSourceInfo();
125  }
126 
127  serialization::DeclID ReadDeclID() {
128  return Record.readDeclID();
129  }
130 
131  std::string ReadString() {
132  return Record.readString();
133  }
134 
135  void ReadDeclIDList(SmallVectorImpl<DeclID> &IDs) {
136  for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
137  IDs.push_back(ReadDeclID());
138  }
139 
140  Decl *ReadDecl() {
141  return Record.readDecl();
142  }
143 
144  template<typename T>
145  T *ReadDeclAs() {
146  return Record.readDeclAs<T>();
147  }
148 
149  void ReadQualifierInfo(QualifierInfo &Info) {
150  Record.readQualifierInfo(Info);
151  }
152 
153  void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name) {
154  Record.readDeclarationNameLoc(DNLoc, Name);
155  }
156 
157  serialization::SubmoduleID readSubmoduleID() {
158  if (Record.getIdx() == Record.size())
159  return 0;
160 
161  return Record.getGlobalSubmoduleID(Record.readInt());
162  }
163 
164  Module *readModule() {
165  return Record.getSubmodule(readSubmoduleID());
166  }
167 
168  void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
169  void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
170  const CXXRecordDecl *D);
171  void MergeDefinitionData(CXXRecordDecl *D,
172  struct CXXRecordDecl::DefinitionData &&NewDD);
173  void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
174  void MergeDefinitionData(ObjCInterfaceDecl *D,
175  struct ObjCInterfaceDecl::DefinitionData &&NewDD);
176  void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
177  void MergeDefinitionData(ObjCProtocolDecl *D,
178  struct ObjCProtocolDecl::DefinitionData &&NewDD);
179 
180  static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
181  DeclContext *DC,
182  unsigned Index);
183  static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
184  unsigned Index, NamedDecl *D);
185 
186  /// Results from loading a RedeclarableDecl.
187  class RedeclarableResult {
188  Decl *MergeWith;
189  GlobalDeclID FirstID;
190  bool IsKeyDecl;
191 
192  public:
193  RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
194  : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
195 
196  /// Retrieve the first ID.
197  GlobalDeclID getFirstID() const { return FirstID; }
198 
199  /// Is this declaration a key declaration?
200  bool isKeyDecl() const { return IsKeyDecl; }
201 
202  /// Get a known declaration that this should be merged with, if
203  /// any.
204  Decl *getKnownMergeTarget() const { return MergeWith; }
205  };
206 
207  /// Class used to capture the result of searching for an existing
208  /// declaration of a specific kind and name, along with the ability
209  /// to update the place where this result was found (the declaration
210  /// chain hanging off an identifier or the DeclContext we searched in)
211  /// if requested.
212  class FindExistingResult {
213  ASTReader &Reader;
214  NamedDecl *New = nullptr;
215  NamedDecl *Existing = nullptr;
216  bool AddResult = false;
217  unsigned AnonymousDeclNumber = 0;
218  IdentifierInfo *TypedefNameForLinkage = nullptr;
219 
220  public:
221  FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
222 
223  FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
224  unsigned AnonymousDeclNumber,
225  IdentifierInfo *TypedefNameForLinkage)
226  : Reader(Reader), New(New), Existing(Existing), AddResult(true),
227  AnonymousDeclNumber(AnonymousDeclNumber),
228  TypedefNameForLinkage(TypedefNameForLinkage) {}
229 
230  FindExistingResult(FindExistingResult &&Other)
231  : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
232  AddResult(Other.AddResult),
233  AnonymousDeclNumber(Other.AnonymousDeclNumber),
234  TypedefNameForLinkage(Other.TypedefNameForLinkage) {
235  Other.AddResult = false;
236  }
237 
238  FindExistingResult &operator=(FindExistingResult &&) = delete;
239  ~FindExistingResult();
240 
241  /// Suppress the addition of this result into the known set of
242  /// names.
243  void suppress() { AddResult = false; }
244 
245  operator NamedDecl*() const { return Existing; }
246 
247  template<typename T>
248  operator T*() const { return dyn_cast_or_null<T>(Existing); }
249  };
250 
251  static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
252  DeclContext *DC);
253  FindExistingResult findExisting(NamedDecl *D);
254 
255  public:
257  ASTReader::RecordLocation Loc,
258  DeclID thisDeclID, SourceLocation ThisDeclLoc)
259  : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
260  ThisDeclLoc(ThisDeclLoc) {}
261 
262  template <typename T> static
265  if (IDs.empty())
266  return;
267 
268  // FIXME: We should avoid this pattern of getting the ASTContext.
269  ASTContext &C = D->getASTContext();
270 
271  auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
272 
273  if (auto &Old = LazySpecializations) {
274  IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
275  llvm::sort(IDs.begin(), IDs.end());
276  IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
277  }
278 
279  auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
280  *Result = IDs.size();
281  std::copy(IDs.begin(), IDs.end(), Result + 1);
282 
283  LazySpecializations = Result;
284  }
285 
286  template <typename DeclT>
287  static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
288  static Decl *getMostRecentDeclImpl(...);
289  static Decl *getMostRecentDecl(Decl *D);
290 
291  template <typename DeclT>
292  static void attachPreviousDeclImpl(ASTReader &Reader,
294  Decl *Canon);
295  static void attachPreviousDeclImpl(ASTReader &Reader, ...);
296  static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
297  Decl *Canon);
298 
299  template <typename DeclT>
300  static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
301  static void attachLatestDeclImpl(...);
302  static void attachLatestDecl(Decl *D, Decl *latest);
303 
304  template <typename DeclT>
305  static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
306  static void markIncompleteDeclChainImpl(...);
307 
308  /// Determine whether this declaration has a pending body.
309  bool hasPendingBody() const { return HasPendingBody; }
310 
311  void ReadFunctionDefinition(FunctionDecl *FD);
312  void Visit(Decl *D);
313 
314  void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
315 
317  ObjCCategoryDecl *Next) {
318  Cat->NextClassCategory = Next;
319  }
320 
321  void VisitDecl(Decl *D);
322  void VisitPragmaCommentDecl(PragmaCommentDecl *D);
323  void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
324  void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
325  void VisitNamedDecl(NamedDecl *ND);
326  void VisitLabelDecl(LabelDecl *LD);
327  void VisitNamespaceDecl(NamespaceDecl *D);
328  void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
329  void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
330  void VisitTypeDecl(TypeDecl *TD);
331  RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
332  void VisitTypedefDecl(TypedefDecl *TD);
333  void VisitTypeAliasDecl(TypeAliasDecl *TD);
334  void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
335  RedeclarableResult VisitTagDecl(TagDecl *TD);
336  void VisitEnumDecl(EnumDecl *ED);
337  RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
338  void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
339  RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
340  void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
341  RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
343 
346  VisitClassTemplateSpecializationDeclImpl(D);
347  }
348 
349  void VisitClassTemplatePartialSpecializationDecl(
351  void VisitClassScopeFunctionSpecializationDecl(
353  RedeclarableResult
354  VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
355 
357  VisitVarTemplateSpecializationDeclImpl(D);
358  }
359 
360  void VisitVarTemplatePartialSpecializationDecl(
362  void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
363  void VisitValueDecl(ValueDecl *VD);
364  void VisitEnumConstantDecl(EnumConstantDecl *ECD);
365  void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
366  void VisitDeclaratorDecl(DeclaratorDecl *DD);
367  void VisitFunctionDecl(FunctionDecl *FD);
368  void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
369  void VisitCXXMethodDecl(CXXMethodDecl *D);
370  void VisitCXXConstructorDecl(CXXConstructorDecl *D);
371  void VisitCXXDestructorDecl(CXXDestructorDecl *D);
372  void VisitCXXConversionDecl(CXXConversionDecl *D);
373  void VisitFieldDecl(FieldDecl *FD);
374  void VisitMSPropertyDecl(MSPropertyDecl *FD);
375  void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
376  RedeclarableResult VisitVarDeclImpl(VarDecl *D);
377  void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
378  void VisitImplicitParamDecl(ImplicitParamDecl *PD);
379  void VisitParmVarDecl(ParmVarDecl *PD);
380  void VisitDecompositionDecl(DecompositionDecl *DD);
381  void VisitBindingDecl(BindingDecl *BD);
382  void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
383  DeclID VisitTemplateDecl(TemplateDecl *D);
384  RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
385  void VisitClassTemplateDecl(ClassTemplateDecl *D);
386  void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
387  void VisitVarTemplateDecl(VarTemplateDecl *D);
388  void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
389  void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
390  void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
391  void VisitUsingDecl(UsingDecl *D);
392  void VisitUsingPackDecl(UsingPackDecl *D);
393  void VisitUsingShadowDecl(UsingShadowDecl *D);
394  void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
395  void VisitLinkageSpecDecl(LinkageSpecDecl *D);
396  void VisitExportDecl(ExportDecl *D);
397  void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
398  void VisitImportDecl(ImportDecl *D);
399  void VisitAccessSpecDecl(AccessSpecDecl *D);
400  void VisitFriendDecl(FriendDecl *D);
401  void VisitFriendTemplateDecl(FriendTemplateDecl *D);
402  void VisitStaticAssertDecl(StaticAssertDecl *D);
403  void VisitBlockDecl(BlockDecl *BD);
404  void VisitCapturedDecl(CapturedDecl *CD);
405  void VisitEmptyDecl(EmptyDecl *D);
406 
407  std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
408 
409  template<typename T>
410  RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
411 
412  template<typename T>
413  void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
414  DeclID TemplatePatternID = 0);
415 
416  template<typename T>
417  void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
418  RedeclarableResult &Redecl,
419  DeclID TemplatePatternID = 0);
420 
421  template<typename T>
422  void mergeMergeable(Mergeable<T> *D);
423 
424  void mergeTemplatePattern(RedeclarableTemplateDecl *D,
425  RedeclarableTemplateDecl *Existing,
426  DeclID DsID, bool IsKeyDecl);
427 
428  ObjCTypeParamList *ReadObjCTypeParamList();
429 
430  // FIXME: Reorder according to DeclNodes.td?
431  void VisitObjCMethodDecl(ObjCMethodDecl *D);
432  void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
433  void VisitObjCContainerDecl(ObjCContainerDecl *D);
434  void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
435  void VisitObjCIvarDecl(ObjCIvarDecl *D);
436  void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
437  void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
438  void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
439  void VisitObjCImplDecl(ObjCImplDecl *D);
440  void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
441  void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
442  void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
443  void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
444  void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
445  void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
446  void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
447  void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
448  };
449 
450 } // namespace clang
451 
452 namespace {
453 
454 /// Iterator over the redeclarations of a declaration that have already
455 /// been merged into the same redeclaration chain.
456 template<typename DeclT>
457 class MergedRedeclIterator {
458  DeclT *Start;
459  DeclT *Canonical = nullptr;
460  DeclT *Current = nullptr;
461 
462 public:
463  MergedRedeclIterator() = default;
464  MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
465 
466  DeclT *operator*() { return Current; }
467 
468  MergedRedeclIterator &operator++() {
469  if (Current->isFirstDecl()) {
470  Canonical = Current;
471  Current = Current->getMostRecentDecl();
472  } else
473  Current = Current->getPreviousDecl();
474 
475  // If we started in the merged portion, we'll reach our start position
476  // eventually. Otherwise, we'll never reach it, but the second declaration
477  // we reached was the canonical declaration, so stop when we see that one
478  // again.
479  if (Current == Start || Current == Canonical)
480  Current = nullptr;
481  return *this;
482  }
483 
484  friend bool operator!=(const MergedRedeclIterator &A,
485  const MergedRedeclIterator &B) {
486  return A.Current != B.Current;
487  }
488 };
489 
490 } // namespace
491 
492 template <typename DeclT>
493 static llvm::iterator_range<MergedRedeclIterator<DeclT>>
494 merged_redecls(DeclT *D) {
495  return llvm::make_range(MergedRedeclIterator<DeclT>(D),
496  MergedRedeclIterator<DeclT>());
497 }
498 
499 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
500  return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
501 }
502 
504  if (Record.readInt())
505  Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
506  if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
507  CD->NumCtorInitializers = Record.readInt();
508  if (CD->NumCtorInitializers)
509  CD->CtorInitializers = ReadGlobalOffset();
510  }
511  // Store the offset of the body so we can lazily load it later.
512  Reader.PendingBodies[FD] = GetCurrentCursorOffset();
513  HasPendingBody = true;
514 }
515 
518 
519  // At this point we have deserialized and merged the decl and it is safe to
520  // update its canonical decl to signal that the entire entity is used.
521  D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
522  IsDeclMarkedUsed = false;
523 
524  if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
525  if (DD->DeclInfo) {
526  auto *Info = DD->DeclInfo.get<DeclaratorDecl::ExtInfo *>();
527  Info->TInfo = GetTypeSourceInfo();
528  }
529  else {
530  DD->DeclInfo = GetTypeSourceInfo();
531  }
532  }
533 
534  if (auto *TD = dyn_cast<TypeDecl>(D)) {
535  // We have a fully initialized TypeDecl. Read its type now.
536  TD->setTypeForDecl(Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull());
537 
538  // If this is a tag declaration with a typedef name for linkage, it's safe
539  // to load that typedef now.
540  if (NamedDeclForTagDecl)
541  cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
542  cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
543  } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
544  // if we have a fully initialized TypeDecl, we can safely read its type now.
545  ID->TypeForDecl = Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull();
546  } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
547  // FunctionDecl's body was written last after all other Stmts/Exprs.
548  // We only read it if FD doesn't already have a body (e.g., from another
549  // module).
550  // FIXME: Can we diagnose ODR violations somehow?
551  if (Record.readInt())
552  ReadFunctionDefinition(FD);
553  }
554 }
555 
557  if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
558  isa<ParmVarDecl>(D)) {
559  // We don't want to deserialize the DeclContext of a template
560  // parameter or of a parameter of a function template immediately. These
561  // entities might be used in the formulation of its DeclContext (for
562  // example, a function parameter can be used in decltype() in trailing
563  // return type of the function). Use the translation unit DeclContext as a
564  // placeholder.
565  GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID();
566  GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID();
567  if (!LexicalDCIDForTemplateParmDecl)
568  LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
569  Reader.addPendingDeclContextInfo(D,
570  SemaDCIDForTemplateParmDecl,
571  LexicalDCIDForTemplateParmDecl);
572  D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
573  } else {
574  auto *SemaDC = ReadDeclAs<DeclContext>();
575  auto *LexicalDC = ReadDeclAs<DeclContext>();
576  if (!LexicalDC)
577  LexicalDC = SemaDC;
578  DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
579  // Avoid calling setLexicalDeclContext() directly because it uses
580  // Decl::getASTContext() internally which is unsafe during derialization.
581  D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
582  Reader.getContext());
583  }
584  D->setLocation(ThisDeclLoc);
585  D->setInvalidDecl(Record.readInt());
586  if (Record.readInt()) { // hasAttrs
587  AttrVec Attrs;
588  Record.readAttributes(Attrs);
589  // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
590  // internally which is unsafe during derialization.
591  D->setAttrsImpl(Attrs, Reader.getContext());
592  }
593  D->setImplicit(Record.readInt());
594  D->Used = Record.readInt();
595  IsDeclMarkedUsed |= D->Used;
596  D->setReferenced(Record.readInt());
597  D->setTopLevelDeclInObjCContainer(Record.readInt());
598  D->setAccess((AccessSpecifier)Record.readInt());
599  D->FromASTFile = true;
600  bool ModulePrivate = Record.readInt();
601 
602  // Determine whether this declaration is part of a (sub)module. If so, it
603  // may not yet be visible.
604  if (unsigned SubmoduleID = readSubmoduleID()) {
605  // Store the owning submodule ID in the declaration.
610 
611  if (ModulePrivate) {
612  // Module-private declarations are never visible, so there is no work to
613  // do.
614  } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
615  // If local visibility is being tracked, this declaration will become
616  // hidden and visible as the owning module does.
617  } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
618  // Mark the declaration as visible when its owning module becomes visible.
619  if (Owner->NameVisibility == Module::AllVisible)
621  else
622  Reader.HiddenNamesMap[Owner].push_back(D);
623  }
624  } else if (ModulePrivate) {
626  }
627 }
628 
630  VisitDecl(D);
631  D->setLocation(ReadSourceLocation());
632  D->CommentKind = (PragmaMSCommentKind)Record.readInt();
633  std::string Arg = ReadString();
634  memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
635  D->getTrailingObjects<char>()[Arg.size()] = '\0';
636 }
637 
639  VisitDecl(D);
640  D->setLocation(ReadSourceLocation());
641  std::string Name = ReadString();
642  memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
643  D->getTrailingObjects<char>()[Name.size()] = '\0';
644 
645  D->ValueStart = Name.size() + 1;
646  std::string Value = ReadString();
647  memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
648  Value.size());
649  D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
650 }
651 
653  llvm_unreachable("Translation units are not serialized");
654 }
655 
657  VisitDecl(ND);
658  ND->setDeclName(Record.readDeclarationName());
659  AnonymousDeclNumber = Record.readInt();
660 }
661 
663  VisitNamedDecl(TD);
664  TD->setLocStart(ReadSourceLocation());
665  // Delay type reading until after we have fully initialized the decl.
666  TypeIDForTypeDecl = Record.getGlobalTypeID(Record.readInt());
667 }
668 
669 ASTDeclReader::RedeclarableResult
671  RedeclarableResult Redecl = VisitRedeclarable(TD);
672  VisitTypeDecl(TD);
673  TypeSourceInfo *TInfo = GetTypeSourceInfo();
674  if (Record.readInt()) { // isModed
675  QualType modedT = Record.readType();
676  TD->setModedTypeSourceInfo(TInfo, modedT);
677  } else
678  TD->setTypeSourceInfo(TInfo);
679  // Read and discard the declaration for which this is a typedef name for
680  // linkage, if it exists. We cannot rely on our type to pull in this decl,
681  // because it might have been merged with a type from another module and
682  // thus might not refer to our version of the declaration.
683  ReadDecl();
684  return Redecl;
685 }
686 
688  RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
689  mergeRedeclarable(TD, Redecl);
690 }
691 
693  RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
694  if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>())
695  // Merged when we merge the template.
696  TD->setDescribedAliasTemplate(Template);
697  else
698  mergeRedeclarable(TD, Redecl);
699 }
700 
701 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
702  RedeclarableResult Redecl = VisitRedeclarable(TD);
703  VisitTypeDecl(TD);
704 
705  TD->IdentifierNamespace = Record.readInt();
706  TD->setTagKind((TagDecl::TagKind)Record.readInt());
707  if (!isa<CXXRecordDecl>(TD))
708  TD->setCompleteDefinition(Record.readInt());
709  TD->setEmbeddedInDeclarator(Record.readInt());
710  TD->setFreeStanding(Record.readInt());
711  TD->setCompleteDefinitionRequired(Record.readInt());
712  TD->setBraceRange(ReadSourceRange());
713 
714  switch (Record.readInt()) {
715  case 0:
716  break;
717  case 1: { // ExtInfo
718  auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
719  ReadQualifierInfo(*Info);
720  TD->TypedefNameDeclOrQualifier = Info;
721  break;
722  }
723  case 2: // TypedefNameForAnonDecl
724  NamedDeclForTagDecl = ReadDeclID();
725  TypedefNameForLinkage = Record.getIdentifierInfo();
726  break;
727  default:
728  llvm_unreachable("unexpected tag info kind");
729  }
730 
731  if (!isa<CXXRecordDecl>(TD))
732  mergeRedeclarable(TD, Redecl);
733  return Redecl;
734 }
735 
737  VisitTagDecl(ED);
738  if (TypeSourceInfo *TI = GetTypeSourceInfo())
739  ED->setIntegerTypeSourceInfo(TI);
740  else
741  ED->setIntegerType(Record.readType());
742  ED->setPromotionType(Record.readType());
743  ED->setNumPositiveBits(Record.readInt());
744  ED->setNumNegativeBits(Record.readInt());
745  ED->IsScoped = Record.readInt();
746  ED->IsScopedUsingClassTag = Record.readInt();
747  ED->IsFixed = Record.readInt();
748 
749  // If this is a definition subject to the ODR, and we already have a
750  // definition, merge this one into it.
751  if (ED->IsCompleteDefinition &&
752  Reader.getContext().getLangOpts().Modules &&
753  Reader.getContext().getLangOpts().CPlusPlus) {
754  EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
755  if (!OldDef) {
756  // This is the first time we've seen an imported definition. Look for a
757  // local definition before deciding that we are the first definition.
758  for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
759  if (!D->isFromASTFile() && D->isCompleteDefinition()) {
760  OldDef = D;
761  break;
762  }
763  }
764  }
765  if (OldDef) {
766  Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
767  ED->IsCompleteDefinition = false;
768  Reader.mergeDefinitionVisibility(OldDef, ED);
769  } else {
770  OldDef = ED;
771  }
772  }
773 
774  if (auto *InstED = ReadDeclAs<EnumDecl>()) {
775  auto TSK = (TemplateSpecializationKind)Record.readInt();
776  SourceLocation POI = ReadSourceLocation();
777  ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
779  }
780 }
781 
782 ASTDeclReader::RedeclarableResult
784  RedeclarableResult Redecl = VisitTagDecl(RD);
785  RD->setHasFlexibleArrayMember(Record.readInt());
786  RD->setAnonymousStructOrUnion(Record.readInt());
787  RD->setHasObjectMember(Record.readInt());
788  RD->setHasVolatileMember(Record.readInt());
789  RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
790  RD->setNonTrivialToPrimitiveCopy(Record.readInt());
791  RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
792  RD->setParamDestroyedInCallee(Record.readInt());
794  return Redecl;
795 }
796 
798  VisitNamedDecl(VD);
799  VD->setType(Record.readType());
800 }
801 
803  VisitValueDecl(ECD);
804  if (Record.readInt())
805  ECD->setInitExpr(Record.readExpr());
806  ECD->setInitVal(Record.readAPSInt());
807  mergeMergeable(ECD);
808 }
809 
811  VisitValueDecl(DD);
812  DD->setInnerLocStart(ReadSourceLocation());
813  if (Record.readInt()) { // hasExtInfo
814  auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
815  ReadQualifierInfo(*Info);
816  DD->DeclInfo = Info;
817  }
818 }
819 
821  RedeclarableResult Redecl = VisitRedeclarable(FD);
822  VisitDeclaratorDecl(FD);
823 
824  ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName());
825  FD->IdentifierNamespace = Record.readInt();
826 
827  // FunctionDecl's body is handled last at ASTDeclReader::Visit,
828  // after everything else is read.
829 
830  FD->SClass = (StorageClass)Record.readInt();
831  FD->IsInline = Record.readInt();
832  FD->IsInlineSpecified = Record.readInt();
833  FD->IsExplicitSpecified = Record.readInt();
834  FD->IsVirtualAsWritten = Record.readInt();
835  FD->IsPure = Record.readInt();
836  FD->HasInheritedPrototype = Record.readInt();
837  FD->HasWrittenPrototype = Record.readInt();
838  FD->IsDeleted = Record.readInt();
839  FD->IsTrivial = Record.readInt();
840  FD->IsTrivialForCall = Record.readInt();
841  FD->IsDefaulted = Record.readInt();
842  FD->IsExplicitlyDefaulted = Record.readInt();
843  FD->HasImplicitReturnZero = Record.readInt();
844  FD->IsConstexpr = Record.readInt();
845  FD->UsesSEHTry = Record.readInt();
846  FD->HasSkippedBody = Record.readInt();
847  FD->IsMultiVersion = Record.readInt();
848  FD->IsLateTemplateParsed = Record.readInt();
849  FD->setCachedLinkage(Linkage(Record.readInt()));
850  FD->EndRangeLoc = ReadSourceLocation();
851 
852  FD->ODRHash = Record.readInt();
853  FD->HasODRHash = true;
854 
855  switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
857  mergeRedeclarable(FD, Redecl);
858  break;
860  // Merged when we merge the template.
861  FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
862  break;
864  auto *InstFD = ReadDeclAs<FunctionDecl>();
865  auto TSK = (TemplateSpecializationKind)Record.readInt();
866  SourceLocation POI = ReadSourceLocation();
867  FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
869  mergeRedeclarable(FD, Redecl);
870  break;
871  }
873  auto *Template = ReadDeclAs<FunctionTemplateDecl>();
874  auto TSK = (TemplateSpecializationKind)Record.readInt();
875 
876  // Template arguments.
878  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
879 
880  // Template args as written.
882  SourceLocation LAngleLoc, RAngleLoc;
883  bool HasTemplateArgumentsAsWritten = Record.readInt();
884  if (HasTemplateArgumentsAsWritten) {
885  unsigned NumTemplateArgLocs = Record.readInt();
886  TemplArgLocs.reserve(NumTemplateArgLocs);
887  for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
888  TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
889 
890  LAngleLoc = ReadSourceLocation();
891  RAngleLoc = ReadSourceLocation();
892  }
893 
894  SourceLocation POI = ReadSourceLocation();
895 
896  ASTContext &C = Reader.getContext();
897  TemplateArgumentList *TemplArgList
898  = TemplateArgumentList::CreateCopy(C, TemplArgs);
899  TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
900  for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
901  TemplArgsInfo.addArgument(TemplArgLocs[i]);
903  = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
904  TemplArgList,
905  HasTemplateArgumentsAsWritten ? &TemplArgsInfo
906  : nullptr,
907  POI);
908  FD->TemplateOrSpecialization = FTInfo;
909 
910  if (FD->isCanonicalDecl()) { // if canonical add to template's set.
911  // The template that contains the specializations set. It's not safe to
912  // use getCanonicalDecl on Template since it may still be initializing.
913  auto *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
914  // Get the InsertPos by FindNodeOrInsertPos() instead of calling
915  // InsertNode(FTInfo) directly to avoid the getASTContext() call in
916  // FunctionTemplateSpecializationInfo's Profile().
917  // We avoid getASTContext because a decl in the parent hierarchy may
918  // be initializing.
919  llvm::FoldingSetNodeID ID;
921  void *InsertPos = nullptr;
922  FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
923  FunctionTemplateSpecializationInfo *ExistingInfo =
924  CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
925  if (InsertPos)
926  CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
927  else {
928  assert(Reader.getContext().getLangOpts().Modules &&
929  "already deserialized this template specialization");
930  mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
931  }
932  }
933  break;
934  }
936  // Templates.
937  UnresolvedSet<8> TemplDecls;
938  unsigned NumTemplates = Record.readInt();
939  while (NumTemplates--)
940  TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
941 
942  // Templates args.
943  TemplateArgumentListInfo TemplArgs;
944  unsigned NumArgs = Record.readInt();
945  while (NumArgs--)
946  TemplArgs.addArgument(Record.readTemplateArgumentLoc());
947  TemplArgs.setLAngleLoc(ReadSourceLocation());
948  TemplArgs.setRAngleLoc(ReadSourceLocation());
949 
950  FD->setDependentTemplateSpecialization(Reader.getContext(),
951  TemplDecls, TemplArgs);
952  // These are not merged; we don't need to merge redeclarations of dependent
953  // template friends.
954  break;
955  }
956  }
957 
958  // Read in the parameters.
959  unsigned NumParams = Record.readInt();
961  Params.reserve(NumParams);
962  for (unsigned I = 0; I != NumParams; ++I)
963  Params.push_back(ReadDeclAs<ParmVarDecl>());
964  FD->setParams(Reader.getContext(), Params);
965 }
966 
968  VisitNamedDecl(MD);
969  if (Record.readInt()) {
970  // Load the body on-demand. Most clients won't care, because method
971  // definitions rarely show up in headers.
972  Reader.PendingBodies[MD] = GetCurrentCursorOffset();
973  HasPendingBody = true;
974  MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
975  MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
976  }
977  MD->setInstanceMethod(Record.readInt());
978  MD->setVariadic(Record.readInt());
979  MD->setPropertyAccessor(Record.readInt());
980  MD->setDefined(Record.readInt());
981  MD->IsOverriding = Record.readInt();
982  MD->HasSkippedBody = Record.readInt();
983 
984  MD->IsRedeclaration = Record.readInt();
985  MD->HasRedeclaration = Record.readInt();
986  if (MD->HasRedeclaration)
987  Reader.getContext().setObjCMethodRedeclaration(MD,
988  ReadDeclAs<ObjCMethodDecl>());
989 
991  MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
992  MD->SetRelatedResultType(Record.readInt());
993  MD->setReturnType(Record.readType());
994  MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
995  MD->DeclEndLoc = ReadSourceLocation();
996  unsigned NumParams = Record.readInt();
998  Params.reserve(NumParams);
999  for (unsigned I = 0; I != NumParams; ++I)
1000  Params.push_back(ReadDeclAs<ParmVarDecl>());
1001 
1002  MD->SelLocsKind = Record.readInt();
1003  unsigned NumStoredSelLocs = Record.readInt();
1005  SelLocs.reserve(NumStoredSelLocs);
1006  for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1007  SelLocs.push_back(ReadSourceLocation());
1008 
1009  MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1010 }
1011 
1013  VisitTypedefNameDecl(D);
1014 
1015  D->Variance = Record.readInt();
1016  D->Index = Record.readInt();
1017  D->VarianceLoc = ReadSourceLocation();
1018  D->ColonLoc = ReadSourceLocation();
1019 }
1020 
1022  VisitNamedDecl(CD);
1023  CD->setAtStartLoc(ReadSourceLocation());
1024  CD->setAtEndRange(ReadSourceRange());
1025 }
1026 
1028  unsigned numParams = Record.readInt();
1029  if (numParams == 0)
1030  return nullptr;
1031 
1033  typeParams.reserve(numParams);
1034  for (unsigned i = 0; i != numParams; ++i) {
1035  auto *typeParam = ReadDeclAs<ObjCTypeParamDecl>();
1036  if (!typeParam)
1037  return nullptr;
1038 
1039  typeParams.push_back(typeParam);
1040  }
1041 
1042  SourceLocation lAngleLoc = ReadSourceLocation();
1043  SourceLocation rAngleLoc = ReadSourceLocation();
1044 
1045  return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1046  typeParams, rAngleLoc);
1047 }
1048 
1049 void ASTDeclReader::ReadObjCDefinitionData(
1050  struct ObjCInterfaceDecl::DefinitionData &Data) {
1051  // Read the superclass.
1052  Data.SuperClassTInfo = GetTypeSourceInfo();
1053 
1054  Data.EndLoc = ReadSourceLocation();
1055  Data.HasDesignatedInitializers = Record.readInt();
1056 
1057  // Read the directly referenced protocols and their SourceLocations.
1058  unsigned NumProtocols = Record.readInt();
1060  Protocols.reserve(NumProtocols);
1061  for (unsigned I = 0; I != NumProtocols; ++I)
1062  Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1064  ProtoLocs.reserve(NumProtocols);
1065  for (unsigned I = 0; I != NumProtocols; ++I)
1066  ProtoLocs.push_back(ReadSourceLocation());
1067  Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1068  Reader.getContext());
1069 
1070  // Read the transitive closure of protocols referenced by this class.
1071  NumProtocols = Record.readInt();
1072  Protocols.clear();
1073  Protocols.reserve(NumProtocols);
1074  for (unsigned I = 0; I != NumProtocols; ++I)
1075  Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1076  Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1077  Reader.getContext());
1078 }
1079 
1080 void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1081  struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1082  // FIXME: odr checking?
1083 }
1084 
1086  RedeclarableResult Redecl = VisitRedeclarable(ID);
1087  VisitObjCContainerDecl(ID);
1088  TypeIDForTypeDecl = Record.getGlobalTypeID(Record.readInt());
1089  mergeRedeclarable(ID, Redecl);
1090 
1091  ID->TypeParamList = ReadObjCTypeParamList();
1092  if (Record.readInt()) {
1093  // Read the definition.
1094  ID->allocateDefinitionData();
1095 
1096  ReadObjCDefinitionData(ID->data());
1097  ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1098  if (Canon->Data.getPointer()) {
1099  // If we already have a definition, keep the definition invariant and
1100  // merge the data.
1101  MergeDefinitionData(Canon, std::move(ID->data()));
1102  ID->Data = Canon->Data;
1103  } else {
1104  // Set the definition data of the canonical declaration, so other
1105  // redeclarations will see it.
1106  ID->getCanonicalDecl()->Data = ID->Data;
1107 
1108  // We will rebuild this list lazily.
1109  ID->setIvarList(nullptr);
1110  }
1111 
1112  // Note that we have deserialized a definition.
1113  Reader.PendingDefinitions.insert(ID);
1114 
1115  // Note that we've loaded this Objective-C class.
1116  Reader.ObjCClassesLoaded.push_back(ID);
1117  } else {
1118  ID->Data = ID->getCanonicalDecl()->Data;
1119  }
1120 }
1121 
1123  VisitFieldDecl(IVD);
1124  IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1125  // This field will be built lazily.
1126  IVD->setNextIvar(nullptr);
1127  bool synth = Record.readInt();
1128  IVD->setSynthesize(synth);
1129 }
1130 
1131 void ASTDeclReader::ReadObjCDefinitionData(
1132  struct ObjCProtocolDecl::DefinitionData &Data) {
1133  unsigned NumProtoRefs = Record.readInt();
1135  ProtoRefs.reserve(NumProtoRefs);
1136  for (unsigned I = 0; I != NumProtoRefs; ++I)
1137  ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1139  ProtoLocs.reserve(NumProtoRefs);
1140  for (unsigned I = 0; I != NumProtoRefs; ++I)
1141  ProtoLocs.push_back(ReadSourceLocation());
1142  Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1143  ProtoLocs.data(), Reader.getContext());
1144 }
1145 
1146 void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1147  struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1148  // FIXME: odr checking?
1149 }
1150 
1152  RedeclarableResult Redecl = VisitRedeclarable(PD);
1153  VisitObjCContainerDecl(PD);
1154  mergeRedeclarable(PD, Redecl);
1155 
1156  if (Record.readInt()) {
1157  // Read the definition.
1158  PD->allocateDefinitionData();
1159 
1160  ReadObjCDefinitionData(PD->data());
1161 
1162  ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1163  if (Canon->Data.getPointer()) {
1164  // If we already have a definition, keep the definition invariant and
1165  // merge the data.
1166  MergeDefinitionData(Canon, std::move(PD->data()));
1167  PD->Data = Canon->Data;
1168  } else {
1169  // Set the definition data of the canonical declaration, so other
1170  // redeclarations will see it.
1171  PD->getCanonicalDecl()->Data = PD->Data;
1172  }
1173  // Note that we have deserialized a definition.
1174  Reader.PendingDefinitions.insert(PD);
1175  } else {
1176  PD->Data = PD->getCanonicalDecl()->Data;
1177  }
1178 }
1179 
1181  VisitFieldDecl(FD);
1182 }
1183 
1185  VisitObjCContainerDecl(CD);
1186  CD->setCategoryNameLoc(ReadSourceLocation());
1187  CD->setIvarLBraceLoc(ReadSourceLocation());
1188  CD->setIvarRBraceLoc(ReadSourceLocation());
1189 
1190  // Note that this category has been deserialized. We do this before
1191  // deserializing the interface declaration, so that it will consider this
1192  /// category.
1193  Reader.CategoriesDeserialized.insert(CD);
1194 
1195  CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1196  CD->TypeParamList = ReadObjCTypeParamList();
1197  unsigned NumProtoRefs = Record.readInt();
1199  ProtoRefs.reserve(NumProtoRefs);
1200  for (unsigned I = 0; I != NumProtoRefs; ++I)
1201  ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1203  ProtoLocs.reserve(NumProtoRefs);
1204  for (unsigned I = 0; I != NumProtoRefs; ++I)
1205  ProtoLocs.push_back(ReadSourceLocation());
1206  CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1207  Reader.getContext());
1208 
1209  // Protocols in the class extension belong to the class.
1210  if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1211  CD->ClassInterface->mergeClassExtensionProtocolList(
1212  (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1213  Reader.getContext());
1214 }
1215 
1217  VisitNamedDecl(CAD);
1218  CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1219 }
1220 
1222  VisitNamedDecl(D);
1223  D->setAtLoc(ReadSourceLocation());
1224  D->setLParenLoc(ReadSourceLocation());
1225  QualType T = Record.readType();
1226  TypeSourceInfo *TSI = GetTypeSourceInfo();
1227  D->setType(T, TSI);
1229  (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1231  (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1233  (ObjCPropertyDecl::PropertyControl)Record.readInt());
1234  DeclarationName GetterName = Record.readDeclarationName();
1235  SourceLocation GetterLoc = ReadSourceLocation();
1236  D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1237  DeclarationName SetterName = Record.readDeclarationName();
1238  SourceLocation SetterLoc = ReadSourceLocation();
1239  D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1240  D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1241  D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1242  D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1243 }
1244 
1246  VisitObjCContainerDecl(D);
1247  D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1248 }
1249 
1251  VisitObjCImplDecl(D);
1252  D->CategoryNameLoc = ReadSourceLocation();
1253 }
1254 
1256  VisitObjCImplDecl(D);
1257  D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1258  D->SuperLoc = ReadSourceLocation();
1259  D->setIvarLBraceLoc(ReadSourceLocation());
1260  D->setIvarRBraceLoc(ReadSourceLocation());
1261  D->setHasNonZeroConstructors(Record.readInt());
1262  D->setHasDestructors(Record.readInt());
1263  D->NumIvarInitializers = Record.readInt();
1264  if (D->NumIvarInitializers)
1265  D->IvarInitializers = ReadGlobalOffset();
1266 }
1267 
1269  VisitDecl(D);
1270  D->setAtLoc(ReadSourceLocation());
1271  D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1272  D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1273  D->IvarLoc = ReadSourceLocation();
1274  D->setGetterCXXConstructor(Record.readExpr());
1275  D->setSetterCXXAssignment(Record.readExpr());
1276 }
1277 
1279  VisitDeclaratorDecl(FD);
1280  FD->Mutable = Record.readInt();
1281 
1282  if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1283  FD->InitStorage.setInt(ISK);
1284  FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1285  ? Record.readType().getAsOpaquePtr()
1286  : Record.readExpr());
1287  }
1288 
1289  if (auto *BW = Record.readExpr())
1290  FD->setBitWidth(BW);
1291 
1292  if (!FD->getDeclName()) {
1293  if (auto *Tmpl = ReadDeclAs<FieldDecl>())
1294  Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1295  }
1296  mergeMergeable(FD);
1297 }
1298 
1300  VisitDeclaratorDecl(PD);
1301  PD->GetterId = Record.getIdentifierInfo();
1302  PD->SetterId = Record.getIdentifierInfo();
1303 }
1304 
1306  VisitValueDecl(FD);
1307 
1308  FD->ChainingSize = Record.readInt();
1309  assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1310  FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1311 
1312  for (unsigned I = 0; I != FD->ChainingSize; ++I)
1313  FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1314 
1315  mergeMergeable(FD);
1316 }
1317 
1318 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1319  RedeclarableResult Redecl = VisitRedeclarable(VD);
1320  VisitDeclaratorDecl(VD);
1321 
1322  VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1323  VD->VarDeclBits.TSCSpec = Record.readInt();
1324  VD->VarDeclBits.InitStyle = Record.readInt();
1325  if (!isa<ParmVarDecl>(VD)) {
1326  VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1327  Record.readInt();
1328  VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1329  VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1330  VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1331  VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1332  VD->NonParmVarDeclBits.ARCPseudoStrong = Record.readInt();
1333  VD->NonParmVarDeclBits.IsInline = Record.readInt();
1334  VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1335  VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1336  VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1337  VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1338  VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1339  }
1340  auto VarLinkage = Linkage(Record.readInt());
1341  VD->setCachedLinkage(VarLinkage);
1342 
1343  // Reconstruct the one piece of the IdentifierNamespace that we need.
1344  if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1346  VD->setLocalExternDecl();
1347 
1348  if (uint64_t Val = Record.readInt()) {
1349  VD->setInit(Record.readExpr());
1350  if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1351  EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1352  Eval->CheckedICE = true;
1353  Eval->IsICE = Val == 3;
1354  }
1355  }
1356 
1357  if (VD->getStorageDuration() == SD_Static && Record.readInt())
1358  Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1359 
1360  enum VarKind {
1361  VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1362  };
1363  switch ((VarKind)Record.readInt()) {
1364  case VarNotTemplate:
1365  // Only true variables (not parameters or implicit parameters) can be
1366  // merged; the other kinds are not really redeclarable at all.
1367  if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1368  !isa<VarTemplateSpecializationDecl>(VD))
1369  mergeRedeclarable(VD, Redecl);
1370  break;
1371  case VarTemplate:
1372  // Merged when we merge the template.
1373  VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1374  break;
1375  case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1376  auto *Tmpl = ReadDeclAs<VarDecl>();
1377  auto TSK = (TemplateSpecializationKind)Record.readInt();
1378  SourceLocation POI = ReadSourceLocation();
1379  Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1380  mergeRedeclarable(VD, Redecl);
1381  break;
1382  }
1383  }
1384 
1385  return Redecl;
1386 }
1387 
1389  VisitVarDecl(PD);
1390 }
1391 
1393  VisitVarDecl(PD);
1394  unsigned isObjCMethodParam = Record.readInt();
1395  unsigned scopeDepth = Record.readInt();
1396  unsigned scopeIndex = Record.readInt();
1397  unsigned declQualifier = Record.readInt();
1398  if (isObjCMethodParam) {
1399  assert(scopeDepth == 0);
1400  PD->setObjCMethodScopeInfo(scopeIndex);
1401  PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1402  } else {
1403  PD->setScopeInfo(scopeDepth, scopeIndex);
1404  }
1405  PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1406  PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1407  if (Record.readInt()) // hasUninstantiatedDefaultArg.
1408  PD->setUninstantiatedDefaultArg(Record.readExpr());
1409 
1410  // FIXME: If this is a redeclaration of a function from another module, handle
1411  // inheritance of default arguments.
1412 }
1413 
1415  VisitVarDecl(DD);
1416  auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1417  for (unsigned I = 0; I != DD->NumBindings; ++I)
1418  BDs[I] = ReadDeclAs<BindingDecl>();
1419 }
1420 
1422  VisitValueDecl(BD);
1423  BD->Binding = Record.readExpr();
1424 }
1425 
1427  VisitDecl(AD);
1428  AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1429  AD->setRParenLoc(ReadSourceLocation());
1430 }
1431 
1433  VisitDecl(BD);
1434  BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1435  BD->setSignatureAsWritten(GetTypeSourceInfo());
1436  unsigned NumParams = Record.readInt();
1438  Params.reserve(NumParams);
1439  for (unsigned I = 0; I != NumParams; ++I)
1440  Params.push_back(ReadDeclAs<ParmVarDecl>());
1441  BD->setParams(Params);
1442 
1443  BD->setIsVariadic(Record.readInt());
1444  BD->setBlockMissingReturnType(Record.readInt());
1445  BD->setIsConversionFromLambda(Record.readInt());
1446 
1447  bool capturesCXXThis = Record.readInt();
1448  unsigned numCaptures = Record.readInt();
1450  captures.reserve(numCaptures);
1451  for (unsigned i = 0; i != numCaptures; ++i) {
1452  auto *decl = ReadDeclAs<VarDecl>();
1453  unsigned flags = Record.readInt();
1454  bool byRef = (flags & 1);
1455  bool nested = (flags & 2);
1456  Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1457 
1458  captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1459  }
1460  BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1461 }
1462 
1464  VisitDecl(CD);
1465  unsigned ContextParamPos = Record.readInt();
1466  CD->setNothrow(Record.readInt() != 0);
1467  // Body is set by VisitCapturedStmt.
1468  for (unsigned I = 0; I < CD->NumParams; ++I) {
1469  if (I != ContextParamPos)
1470  CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1471  else
1472  CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1473  }
1474 }
1475 
1477  VisitDecl(D);
1478  D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1479  D->setExternLoc(ReadSourceLocation());
1480  D->setRBraceLoc(ReadSourceLocation());
1481 }
1482 
1484  VisitDecl(D);
1485  D->RBraceLoc = ReadSourceLocation();
1486 }
1487 
1489  VisitNamedDecl(D);
1490  D->setLocStart(ReadSourceLocation());
1491 }
1492 
1494  RedeclarableResult Redecl = VisitRedeclarable(D);
1495  VisitNamedDecl(D);
1496  D->setInline(Record.readInt());
1497  D->LocStart = ReadSourceLocation();
1498  D->RBraceLoc = ReadSourceLocation();
1499 
1500  // Defer loading the anonymous namespace until we've finished merging
1501  // this namespace; loading it might load a later declaration of the
1502  // same namespace, and we have an invariant that older declarations
1503  // get merged before newer ones try to merge.
1504  GlobalDeclID AnonNamespace = 0;
1505  if (Redecl.getFirstID() == ThisDeclID) {
1506  AnonNamespace = ReadDeclID();
1507  } else {
1508  // Link this namespace back to the first declaration, which has already
1509  // been deserialized.
1510  D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1511  }
1512 
1513  mergeRedeclarable(D, Redecl);
1514 
1515  if (AnonNamespace) {
1516  // Each module has its own anonymous namespace, which is disjoint from
1517  // any other module's anonymous namespaces, so don't attach the anonymous
1518  // namespace at all.
1519  auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1520  if (!Record.isModule())
1521  D->setAnonymousNamespace(Anon);
1522  }
1523 }
1524 
1526  RedeclarableResult Redecl = VisitRedeclarable(D);
1527  VisitNamedDecl(D);
1528  D->NamespaceLoc = ReadSourceLocation();
1529  D->IdentLoc = ReadSourceLocation();
1530  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1531  D->Namespace = ReadDeclAs<NamedDecl>();
1532  mergeRedeclarable(D, Redecl);
1533 }
1534 
1536  VisitNamedDecl(D);
1537  D->setUsingLoc(ReadSourceLocation());
1538  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1539  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1540  D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1541  D->setTypename(Record.readInt());
1542  if (auto *Pattern = ReadDeclAs<NamedDecl>())
1543  Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1544  mergeMergeable(D);
1545 }
1546 
1548  VisitNamedDecl(D);
1549  D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1550  auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1551  for (unsigned I = 0; I != D->NumExpansions; ++I)
1552  Expansions[I] = ReadDeclAs<NamedDecl>();
1553  mergeMergeable(D);
1554 }
1555 
1557  RedeclarableResult Redecl = VisitRedeclarable(D);
1558  VisitNamedDecl(D);
1559  D->Underlying = ReadDeclAs<NamedDecl>();
1560  D->IdentifierNamespace = Record.readInt();
1561  D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1562  auto *Pattern = ReadDeclAs<UsingShadowDecl>();
1563  if (Pattern)
1564  Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1565  mergeRedeclarable(D, Redecl);
1566 }
1567 
1570  VisitUsingShadowDecl(D);
1571  D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1572  D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1573  D->IsVirtual = Record.readInt();
1574 }
1575 
1577  VisitNamedDecl(D);
1578  D->UsingLoc = ReadSourceLocation();
1579  D->NamespaceLoc = ReadSourceLocation();
1580  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1581  D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1582  D->CommonAncestor = ReadDeclAs<DeclContext>();
1583 }
1584 
1586  VisitValueDecl(D);
1587  D->setUsingLoc(ReadSourceLocation());
1588  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1589  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1590  D->EllipsisLoc = ReadSourceLocation();
1591  mergeMergeable(D);
1592 }
1593 
1596  VisitTypeDecl(D);
1597  D->TypenameLocation = ReadSourceLocation();
1598  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1599  D->EllipsisLoc = ReadSourceLocation();
1600  mergeMergeable(D);
1601 }
1602 
1603 void ASTDeclReader::ReadCXXDefinitionData(
1604  struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1605  // Note: the caller has deserialized the IsLambda bit already.
1606  Data.UserDeclaredConstructor = Record.readInt();
1607  Data.UserDeclaredSpecialMembers = Record.readInt();
1608  Data.Aggregate = Record.readInt();
1609  Data.PlainOldData = Record.readInt();
1610  Data.Empty = Record.readInt();
1611  Data.Polymorphic = Record.readInt();
1612  Data.Abstract = Record.readInt();
1613  Data.IsStandardLayout = Record.readInt();
1614  Data.IsCXX11StandardLayout = Record.readInt();
1615  Data.HasBasesWithFields = Record.readInt();
1616  Data.HasBasesWithNonStaticDataMembers = Record.readInt();
1617  Data.HasPrivateFields = Record.readInt();
1618  Data.HasProtectedFields = Record.readInt();
1619  Data.HasPublicFields = Record.readInt();
1620  Data.HasMutableFields = Record.readInt();
1621  Data.HasVariantMembers = Record.readInt();
1622  Data.HasOnlyCMembers = Record.readInt();
1623  Data.HasInClassInitializer = Record.readInt();
1624  Data.HasUninitializedReferenceMember = Record.readInt();
1625  Data.HasUninitializedFields = Record.readInt();
1626  Data.HasInheritedConstructor = Record.readInt();
1627  Data.HasInheritedAssignment = Record.readInt();
1628  Data.NeedOverloadResolutionForCopyConstructor = Record.readInt();
1629  Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1630  Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1631  Data.NeedOverloadResolutionForDestructor = Record.readInt();
1632  Data.DefaultedCopyConstructorIsDeleted = Record.readInt();
1633  Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1634  Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1635  Data.DefaultedDestructorIsDeleted = Record.readInt();
1636  Data.HasTrivialSpecialMembers = Record.readInt();
1637  Data.HasTrivialSpecialMembersForCall = Record.readInt();
1638  Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1639  Data.DeclaredNonTrivialSpecialMembersForCall = Record.readInt();
1640  Data.HasIrrelevantDestructor = Record.readInt();
1641  Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1642  Data.HasDefaultedDefaultConstructor = Record.readInt();
1643  Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1644  Data.HasConstexprDefaultConstructor = Record.readInt();
1645  Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1646  Data.ComputedVisibleConversions = Record.readInt();
1647  Data.UserProvidedDefaultConstructor = Record.readInt();
1648  Data.DeclaredSpecialMembers = Record.readInt();
1649  Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1650  Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1651  Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1652  Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1653  Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1654  Data.ODRHash = Record.readInt();
1655  Data.HasODRHash = true;
1656 
1657  if (Record.readInt())
1658  Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1659 
1660  Data.NumBases = Record.readInt();
1661  if (Data.NumBases)
1662  Data.Bases = ReadGlobalOffset();
1663  Data.NumVBases = Record.readInt();
1664  if (Data.NumVBases)
1665  Data.VBases = ReadGlobalOffset();
1666 
1667  Record.readUnresolvedSet(Data.Conversions);
1668  Record.readUnresolvedSet(Data.VisibleConversions);
1669  assert(Data.Definition && "Data.Definition should be already set!");
1670  Data.FirstFriend = ReadDeclID();
1671 
1672  if (Data.IsLambda) {
1673  using Capture = LambdaCapture;
1674 
1675  auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1676  Lambda.Dependent = Record.readInt();
1677  Lambda.IsGenericLambda = Record.readInt();
1678  Lambda.CaptureDefault = Record.readInt();
1679  Lambda.NumCaptures = Record.readInt();
1680  Lambda.NumExplicitCaptures = Record.readInt();
1681  Lambda.ManglingNumber = Record.readInt();
1682  Lambda.ContextDecl = ReadDeclID();
1683  Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1684  sizeof(Capture) * Lambda.NumCaptures);
1685  Capture *ToCapture = Lambda.Captures;
1686  Lambda.MethodTyInfo = GetTypeSourceInfo();
1687  for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1688  SourceLocation Loc = ReadSourceLocation();
1689  bool IsImplicit = Record.readInt();
1690  auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1691  switch (Kind) {
1692  case LCK_StarThis:
1693  case LCK_This:
1694  case LCK_VLAType:
1695  *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1696  break;
1697  case LCK_ByCopy:
1698  case LCK_ByRef:
1699  auto *Var = ReadDeclAs<VarDecl>();
1700  SourceLocation EllipsisLoc = ReadSourceLocation();
1701  *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1702  break;
1703  }
1704  }
1705  }
1706 }
1707 
1708 void ASTDeclReader::MergeDefinitionData(
1709  CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1710  assert(D->DefinitionData &&
1711  "merging class definition into non-definition");
1712  auto &DD = *D->DefinitionData;
1713 
1714  if (DD.Definition != MergeDD.Definition) {
1715  // Track that we merged the definitions.
1716  Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1717  DD.Definition));
1718  Reader.PendingDefinitions.erase(MergeDD.Definition);
1719  MergeDD.Definition->IsCompleteDefinition = false;
1720  Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1721  assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1722  "already loaded pending lookups for merged definition");
1723  }
1724 
1725  auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1726  if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1727  PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1728  // We faked up this definition data because we found a class for which we'd
1729  // not yet loaded the definition. Replace it with the real thing now.
1730  assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1731  PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1732 
1733  // Don't change which declaration is the definition; that is required
1734  // to be invariant once we select it.
1735  auto *Def = DD.Definition;
1736  DD = std::move(MergeDD);
1737  DD.Definition = Def;
1738  return;
1739  }
1740 
1741  // FIXME: Move this out into a .def file?
1742  bool DetectedOdrViolation = false;
1743 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1744 #define MATCH_FIELD(Field) \
1745  DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1746  OR_FIELD(Field)
1747  MATCH_FIELD(UserDeclaredConstructor)
1748  MATCH_FIELD(UserDeclaredSpecialMembers)
1749  MATCH_FIELD(Aggregate)
1750  MATCH_FIELD(PlainOldData)
1751  MATCH_FIELD(Empty)
1752  MATCH_FIELD(Polymorphic)
1753  MATCH_FIELD(Abstract)
1754  MATCH_FIELD(IsStandardLayout)
1755  MATCH_FIELD(IsCXX11StandardLayout)
1756  MATCH_FIELD(HasBasesWithFields)
1757  MATCH_FIELD(HasBasesWithNonStaticDataMembers)
1758  MATCH_FIELD(HasPrivateFields)
1759  MATCH_FIELD(HasProtectedFields)
1760  MATCH_FIELD(HasPublicFields)
1761  MATCH_FIELD(HasMutableFields)
1762  MATCH_FIELD(HasVariantMembers)
1763  MATCH_FIELD(HasOnlyCMembers)
1764  MATCH_FIELD(HasInClassInitializer)
1765  MATCH_FIELD(HasUninitializedReferenceMember)
1766  MATCH_FIELD(HasUninitializedFields)
1767  MATCH_FIELD(HasInheritedConstructor)
1768  MATCH_FIELD(HasInheritedAssignment)
1769  MATCH_FIELD(NeedOverloadResolutionForCopyConstructor)
1770  MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1771  MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1772  MATCH_FIELD(NeedOverloadResolutionForDestructor)
1773  MATCH_FIELD(DefaultedCopyConstructorIsDeleted)
1774  MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1775  MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1776  MATCH_FIELD(DefaultedDestructorIsDeleted)
1777  OR_FIELD(HasTrivialSpecialMembers)
1778  OR_FIELD(HasTrivialSpecialMembersForCall)
1779  OR_FIELD(DeclaredNonTrivialSpecialMembers)
1780  OR_FIELD(DeclaredNonTrivialSpecialMembersForCall)
1781  MATCH_FIELD(HasIrrelevantDestructor)
1782  OR_FIELD(HasConstexprNonCopyMoveConstructor)
1783  OR_FIELD(HasDefaultedDefaultConstructor)
1784  MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1785  OR_FIELD(HasConstexprDefaultConstructor)
1786  MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1787  // ComputedVisibleConversions is handled below.
1788  MATCH_FIELD(UserProvidedDefaultConstructor)
1789  OR_FIELD(DeclaredSpecialMembers)
1790  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1791  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1792  MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1793  OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1794  OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1795  MATCH_FIELD(IsLambda)
1796 #undef OR_FIELD
1797 #undef MATCH_FIELD
1798 
1799  if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1800  DetectedOdrViolation = true;
1801  // FIXME: Issue a diagnostic if the base classes don't match when we come
1802  // to lazily load them.
1803 
1804  // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1805  // match when we come to lazily load them.
1806  if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1807  DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1808  DD.ComputedVisibleConversions = true;
1809  }
1810 
1811  // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1812  // lazily load it.
1813 
1814  if (DD.IsLambda) {
1815  // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1816  // when they occur within the body of a function template specialization).
1817  }
1818 
1819  if (D->getODRHash() != MergeDD.ODRHash) {
1820  DetectedOdrViolation = true;
1821  }
1822 
1823  if (DetectedOdrViolation)
1824  Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1825  {MergeDD.Definition, &MergeDD});
1826 }
1827 
1828 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1829  struct CXXRecordDecl::DefinitionData *DD;
1830  ASTContext &C = Reader.getContext();
1831 
1832  // Determine whether this is a lambda closure type, so that we can
1833  // allocate the appropriate DefinitionData structure.
1834  bool IsLambda = Record.readInt();
1835  if (IsLambda)
1836  DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1837  LCD_None);
1838  else
1839  DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1840 
1841  CXXRecordDecl *Canon = D->getCanonicalDecl();
1842  // Set decl definition data before reading it, so that during deserialization
1843  // when we read CXXRecordDecl, it already has definition data and we don't
1844  // set fake one.
1845  if (!Canon->DefinitionData)
1846  Canon->DefinitionData = DD;
1847  D->DefinitionData = Canon->DefinitionData;
1848  ReadCXXDefinitionData(*DD, D);
1849 
1850  // We might already have a different definition for this record. This can
1851  // happen either because we're reading an update record, or because we've
1852  // already done some merging. Either way, just merge into it.
1853  if (Canon->DefinitionData != DD) {
1854  MergeDefinitionData(Canon, std::move(*DD));
1855  return;
1856  }
1857 
1858  // Mark this declaration as being a definition.
1859  D->IsCompleteDefinition = true;
1860 
1861  // If this is not the first declaration or is an update record, we can have
1862  // other redeclarations already. Make a note that we need to propagate the
1863  // DefinitionData pointer onto them.
1864  if (Update || Canon != D)
1865  Reader.PendingDefinitions.insert(D);
1866 }
1867 
1868 ASTDeclReader::RedeclarableResult
1870  RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1871 
1872  ASTContext &C = Reader.getContext();
1873 
1874  enum CXXRecKind {
1875  CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1876  };
1877  switch ((CXXRecKind)Record.readInt()) {
1878  case CXXRecNotTemplate:
1879  // Merged when we merge the folding set entry in the primary template.
1880  if (!isa<ClassTemplateSpecializationDecl>(D))
1881  mergeRedeclarable(D, Redecl);
1882  break;
1883  case CXXRecTemplate: {
1884  // Merged when we merge the template.
1885  auto *Template = ReadDeclAs<ClassTemplateDecl>();
1886  D->TemplateOrInstantiation = Template;
1887  if (!Template->getTemplatedDecl()) {
1888  // We've not actually loaded the ClassTemplateDecl yet, because we're
1889  // currently being loaded as its pattern. Rely on it to set up our
1890  // TypeForDecl (see VisitClassTemplateDecl).
1891  //
1892  // Beware: we do not yet know our canonical declaration, and may still
1893  // get merged once the surrounding class template has got off the ground.
1894  TypeIDForTypeDecl = 0;
1895  }
1896  break;
1897  }
1898  case CXXRecMemberSpecialization: {
1899  auto *RD = ReadDeclAs<CXXRecordDecl>();
1900  auto TSK = (TemplateSpecializationKind)Record.readInt();
1901  SourceLocation POI = ReadSourceLocation();
1902  MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1903  MSI->setPointOfInstantiation(POI);
1904  D->TemplateOrInstantiation = MSI;
1905  mergeRedeclarable(D, Redecl);
1906  break;
1907  }
1908  }
1909 
1910  bool WasDefinition = Record.readInt();
1911  if (WasDefinition)
1912  ReadCXXRecordDefinition(D, /*Update*/false);
1913  else
1914  // Propagate DefinitionData pointer from the canonical declaration.
1915  D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1916 
1917  // Lazily load the key function to avoid deserializing every method so we can
1918  // compute it.
1919  if (WasDefinition) {
1920  DeclID KeyFn = ReadDeclID();
1921  if (KeyFn && D->IsCompleteDefinition)
1922  // FIXME: This is wrong for the ARM ABI, where some other module may have
1923  // made this function no longer be a key function. We need an update
1924  // record or similar for that case.
1925  C.KeyFunctions[D] = KeyFn;
1926  }
1927 
1928  return Redecl;
1929 }
1930 
1932  VisitFunctionDecl(D);
1933  D->IsCopyDeductionCandidate = Record.readInt();
1934 }
1935 
1937  VisitFunctionDecl(D);
1938 
1939  unsigned NumOverridenMethods = Record.readInt();
1940  if (D->isCanonicalDecl()) {
1941  while (NumOverridenMethods--) {
1942  // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1943  // MD may be initializing.
1944  if (auto *MD = ReadDeclAs<CXXMethodDecl>())
1945  Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1946  }
1947  } else {
1948  // We don't care about which declarations this used to override; we get
1949  // the relevant information from the canonical declaration.
1950  Record.skipInts(NumOverridenMethods);
1951  }
1952 }
1953 
1955  // We need the inherited constructor information to merge the declaration,
1956  // so we have to read it before we call VisitCXXMethodDecl.
1957  if (D->isInheritingConstructor()) {
1958  auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1959  auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1960  *D->getTrailingObjects<InheritedConstructor>() =
1961  InheritedConstructor(Shadow, Ctor);
1962  }
1963 
1964  VisitCXXMethodDecl(D);
1965 }
1966 
1968  VisitCXXMethodDecl(D);
1969 
1970  if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
1971  CXXDestructorDecl *Canon = D->getCanonicalDecl();
1972  auto *ThisArg = Record.readExpr();
1973  // FIXME: Check consistency if we have an old and new operator delete.
1974  if (!Canon->OperatorDelete) {
1975  Canon->OperatorDelete = OperatorDelete;
1976  Canon->OperatorDeleteThisArg = ThisArg;
1977  }
1978  }
1979 }
1980 
1982  VisitCXXMethodDecl(D);
1983 }
1984 
1986  VisitDecl(D);
1987  D->ImportedAndComplete.setPointer(readModule());
1988  D->ImportedAndComplete.setInt(Record.readInt());
1989  auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
1990  for (unsigned I = 0, N = Record.back(); I != N; ++I)
1991  StoredLocs[I] = ReadSourceLocation();
1992  Record.skipInts(1); // The number of stored source locations.
1993 }
1994 
1996  VisitDecl(D);
1997  D->setColonLoc(ReadSourceLocation());
1998 }
1999 
2001  VisitDecl(D);
2002  if (Record.readInt()) // hasFriendDecl
2003  D->Friend = ReadDeclAs<NamedDecl>();
2004  else
2005  D->Friend = GetTypeSourceInfo();
2006  for (unsigned i = 0; i != D->NumTPLists; ++i)
2007  D->getTrailingObjects<TemplateParameterList *>()[i] =
2008  Record.readTemplateParameterList();
2009  D->NextFriend = ReadDeclID();
2010  D->UnsupportedFriend = (Record.readInt() != 0);
2011  D->FriendLoc = ReadSourceLocation();
2012 }
2013 
2015  VisitDecl(D);
2016  unsigned NumParams = Record.readInt();
2017  D->NumParams = NumParams;
2018  D->Params = new TemplateParameterList*[NumParams];
2019  for (unsigned i = 0; i != NumParams; ++i)
2020  D->Params[i] = Record.readTemplateParameterList();
2021  if (Record.readInt()) // HasFriendDecl
2022  D->Friend = ReadDeclAs<NamedDecl>();
2023  else
2024  D->Friend = GetTypeSourceInfo();
2025  D->FriendLoc = ReadSourceLocation();
2026 }
2027 
2029  VisitNamedDecl(D);
2030 
2031  DeclID PatternID = ReadDeclID();
2032  auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2033  TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2034  // FIXME handle associated constraints
2035  D->init(TemplatedDecl, TemplateParams);
2036 
2037  return PatternID;
2038 }
2039 
2040 ASTDeclReader::RedeclarableResult
2042  RedeclarableResult Redecl = VisitRedeclarable(D);
2043 
2044  // Make sure we've allocated the Common pointer first. We do this before
2045  // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2047  if (!CanonD->Common) {
2048  CanonD->Common = CanonD->newCommon(Reader.getContext());
2049  Reader.PendingDefinitions.insert(CanonD);
2050  }
2051  D->Common = CanonD->Common;
2052 
2053  // If this is the first declaration of the template, fill in the information
2054  // for the 'common' pointer.
2055  if (ThisDeclID == Redecl.getFirstID()) {
2056  if (auto *RTD = ReadDeclAs<RedeclarableTemplateDecl>()) {
2057  assert(RTD->getKind() == D->getKind() &&
2058  "InstantiatedFromMemberTemplate kind mismatch");
2060  if (Record.readInt())
2062  }
2063  }
2064 
2065  DeclID PatternID = VisitTemplateDecl(D);
2066  D->IdentifierNamespace = Record.readInt();
2067 
2068  mergeRedeclarable(D, Redecl, PatternID);
2069 
2070  // If we merged the template with a prior declaration chain, merge the common
2071  // pointer.
2072  // FIXME: Actually merge here, don't just overwrite.
2073  D->Common = D->getCanonicalDecl()->Common;
2074 
2075  return Redecl;
2076 }
2077 
2079  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2080 
2081  if (ThisDeclID == Redecl.getFirstID()) {
2082  // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2083  // the specializations.
2085  ReadDeclIDList(SpecIDs);
2087  }
2088 
2089  if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2090  // We were loaded before our templated declaration was. We've not set up
2091  // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2092  // it now.
2093  Reader.getContext().getInjectedClassNameType(
2095  }
2096 }
2097 
2099  llvm_unreachable("BuiltinTemplates are not serialized");
2100 }
2101 
2102 /// TODO: Unify with ClassTemplateDecl version?
2103 /// May require unifying ClassTemplateDecl and
2104 /// VarTemplateDecl beyond TemplateDecl...
2106  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2107 
2108  if (ThisDeclID == Redecl.getFirstID()) {
2109  // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2110  // the specializations.
2112  ReadDeclIDList(SpecIDs);
2114  }
2115 }
2116 
2117 ASTDeclReader::RedeclarableResult
2120  RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2121 
2122  ASTContext &C = Reader.getContext();
2123  if (Decl *InstD = ReadDecl()) {
2124  if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2125  D->SpecializedTemplate = CTD;
2126  } else {
2128  Record.readTemplateArgumentList(TemplArgs);
2129  TemplateArgumentList *ArgList
2130  = TemplateArgumentList::CreateCopy(C, TemplArgs);
2131  auto *PS =
2133  SpecializedPartialSpecialization();
2134  PS->PartialSpecialization
2135  = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2136  PS->TemplateArgs = ArgList;
2137  D->SpecializedTemplate = PS;
2138  }
2139  }
2140 
2142  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2143  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2144  D->PointOfInstantiation = ReadSourceLocation();
2145  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2146 
2147  bool writtenAsCanonicalDecl = Record.readInt();
2148  if (writtenAsCanonicalDecl) {
2149  auto *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2150  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2151  // Set this as, or find, the canonical declaration for this specialization
2153  if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2154  CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2155  .GetOrInsertNode(Partial);
2156  } else {
2157  CanonSpec =
2158  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2159  }
2160  // If there was already a canonical specialization, merge into it.
2161  if (CanonSpec != D) {
2162  mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2163 
2164  // This declaration might be a definition. Merge with any existing
2165  // definition.
2166  if (auto *DDD = D->DefinitionData) {
2167  if (CanonSpec->DefinitionData)
2168  MergeDefinitionData(CanonSpec, std::move(*DDD));
2169  else
2170  CanonSpec->DefinitionData = D->DefinitionData;
2171  }
2172  D->DefinitionData = CanonSpec->DefinitionData;
2173  }
2174  }
2175  }
2176 
2177  // Explicit info.
2178  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2179  auto *ExplicitInfo =
2180  new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2181  ExplicitInfo->TypeAsWritten = TyInfo;
2182  ExplicitInfo->ExternLoc = ReadSourceLocation();
2183  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2184  D->ExplicitInfo = ExplicitInfo;
2185  }
2186 
2187  return Redecl;
2188 }
2189 
2192  RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2193 
2194  D->TemplateParams = Record.readTemplateParameterList();
2195  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2196 
2197  // These are read/set from/to the first declaration.
2198  if (ThisDeclID == Redecl.getFirstID()) {
2199  D->InstantiatedFromMember.setPointer(
2200  ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2201  D->InstantiatedFromMember.setInt(Record.readInt());
2202  }
2203 }
2204 
2207  VisitDecl(D);
2208  D->Specialization = ReadDeclAs<CXXMethodDecl>();
2209 }
2210 
2212  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2213 
2214  if (ThisDeclID == Redecl.getFirstID()) {
2215  // This FunctionTemplateDecl owns a CommonPtr; read it.
2217  ReadDeclIDList(SpecIDs);
2219  }
2220 }
2221 
2222 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2223 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2224 /// VarTemplate(Partial)SpecializationDecl with a new data
2225 /// structure Template(Partial)SpecializationDecl, and
2226 /// using Template(Partial)SpecializationDecl as input type.
2227 ASTDeclReader::RedeclarableResult
2230  RedeclarableResult Redecl = VisitVarDeclImpl(D);
2231 
2232  ASTContext &C = Reader.getContext();
2233  if (Decl *InstD = ReadDecl()) {
2234  if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2235  D->SpecializedTemplate = VTD;
2236  } else {
2238  Record.readTemplateArgumentList(TemplArgs);
2240  C, TemplArgs);
2241  auto *PS =
2242  new (C)
2243  VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2244  PS->PartialSpecialization =
2245  cast<VarTemplatePartialSpecializationDecl>(InstD);
2246  PS->TemplateArgs = ArgList;
2247  D->SpecializedTemplate = PS;
2248  }
2249  }
2250 
2251  // Explicit info.
2252  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2253  auto *ExplicitInfo =
2254  new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2255  ExplicitInfo->TypeAsWritten = TyInfo;
2256  ExplicitInfo->ExternLoc = ReadSourceLocation();
2257  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2258  D->ExplicitInfo = ExplicitInfo;
2259  }
2260 
2262  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2263  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2264  D->PointOfInstantiation = ReadSourceLocation();
2265  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2266  D->IsCompleteDefinition = Record.readInt();
2267 
2268  bool writtenAsCanonicalDecl = Record.readInt();
2269  if (writtenAsCanonicalDecl) {
2270  auto *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2271  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2272  // FIXME: If it's already present, merge it.
2273  if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2274  CanonPattern->getCommonPtr()->PartialSpecializations
2275  .GetOrInsertNode(Partial);
2276  } else {
2277  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2278  }
2279  }
2280  }
2281 
2282  return Redecl;
2283 }
2284 
2285 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2286 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2287 /// VarTemplate(Partial)SpecializationDecl with a new data
2288 /// structure Template(Partial)SpecializationDecl, and
2289 /// using Template(Partial)SpecializationDecl as input type.
2292  RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2293 
2294  D->TemplateParams = Record.readTemplateParameterList();
2295  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2296 
2297  // These are read/set from/to the first declaration.
2298  if (ThisDeclID == Redecl.getFirstID()) {
2299  D->InstantiatedFromMember.setPointer(
2300  ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2301  D->InstantiatedFromMember.setInt(Record.readInt());
2302  }
2303 }
2304 
2306  VisitTypeDecl(D);
2307 
2308  D->setDeclaredWithTypename(Record.readInt());
2309 
2310  if (Record.readInt())
2311  D->setDefaultArgument(GetTypeSourceInfo());
2312 }
2313 
2315  VisitDeclaratorDecl(D);
2316  // TemplateParmPosition.
2317  D->setDepth(Record.readInt());
2318  D->setPosition(Record.readInt());
2319  if (D->isExpandedParameterPack()) {
2320  auto TypesAndInfos =
2321  D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2322  for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2323  new (&TypesAndInfos[I].first) QualType(Record.readType());
2324  TypesAndInfos[I].second = GetTypeSourceInfo();
2325  }
2326  } else {
2327  // Rest of NonTypeTemplateParmDecl.
2328  D->ParameterPack = Record.readInt();
2329  if (Record.readInt())
2330  D->setDefaultArgument(Record.readExpr());
2331  }
2332 }
2333 
2335  VisitTemplateDecl(D);
2336  // TemplateParmPosition.
2337  D->setDepth(Record.readInt());
2338  D->setPosition(Record.readInt());
2339  if (D->isExpandedParameterPack()) {
2340  auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2341  for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2342  I != N; ++I)
2343  Data[I] = Record.readTemplateParameterList();
2344  } else {
2345  // Rest of TemplateTemplateParmDecl.
2346  D->ParameterPack = Record.readInt();
2347  if (Record.readInt())
2348  D->setDefaultArgument(Reader.getContext(),
2349  Record.readTemplateArgumentLoc());
2350  }
2351 }
2352 
2354  VisitRedeclarableTemplateDecl(D);
2355 }
2356 
2358  VisitDecl(D);
2359  D->AssertExprAndFailed.setPointer(Record.readExpr());
2360  D->AssertExprAndFailed.setInt(Record.readInt());
2361  D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2362  D->RParenLoc = ReadSourceLocation();
2363 }
2364 
2366  VisitDecl(D);
2367 }
2368 
2369 std::pair<uint64_t, uint64_t>
2371  uint64_t LexicalOffset = ReadLocalOffset();
2372  uint64_t VisibleOffset = ReadLocalOffset();
2373  return std::make_pair(LexicalOffset, VisibleOffset);
2374 }
2375 
2376 template <typename T>
2377 ASTDeclReader::RedeclarableResult
2379  DeclID FirstDeclID = ReadDeclID();
2380  Decl *MergeWith = nullptr;
2381 
2382  bool IsKeyDecl = ThisDeclID == FirstDeclID;
2383  bool IsFirstLocalDecl = false;
2384 
2385  uint64_t RedeclOffset = 0;
2386 
2387  // 0 indicates that this declaration was the only declaration of its entity,
2388  // and is used for space optimization.
2389  if (FirstDeclID == 0) {
2390  FirstDeclID = ThisDeclID;
2391  IsKeyDecl = true;
2392  IsFirstLocalDecl = true;
2393  } else if (unsigned N = Record.readInt()) {
2394  // This declaration was the first local declaration, but may have imported
2395  // other declarations.
2396  IsKeyDecl = N == 1;
2397  IsFirstLocalDecl = true;
2398 
2399  // We have some declarations that must be before us in our redeclaration
2400  // chain. Read them now, and remember that we ought to merge with one of
2401  // them.
2402  // FIXME: Provide a known merge target to the second and subsequent such
2403  // declaration.
2404  for (unsigned I = 0; I != N - 1; ++I)
2405  MergeWith = ReadDecl();
2406 
2407  RedeclOffset = ReadLocalOffset();
2408  } else {
2409  // This declaration was not the first local declaration. Read the first
2410  // local declaration now, to trigger the import of other redeclarations.
2411  (void)ReadDecl();
2412  }
2413 
2414  auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2415  if (FirstDecl != D) {
2416  // We delay loading of the redeclaration chain to avoid deeply nested calls.
2417  // We temporarily set the first (canonical) declaration as the previous one
2418  // which is the one that matters and mark the real previous DeclID to be
2419  // loaded & attached later on.
2421  D->First = FirstDecl->getCanonicalDecl();
2422  }
2423 
2424  auto *DAsT = static_cast<T *>(D);
2425 
2426  // Note that we need to load local redeclarations of this decl and build a
2427  // decl chain for them. This must happen *after* we perform the preloading
2428  // above; this ensures that the redeclaration chain is built in the correct
2429  // order.
2430  if (IsFirstLocalDecl)
2431  Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2432 
2433  return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2434 }
2435 
2436 /// Attempts to merge the given declaration (D) with another declaration
2437 /// of the same entity.
2438 template<typename T>
2440  RedeclarableResult &Redecl,
2441  DeclID TemplatePatternID) {
2442  // If modules are not available, there is no reason to perform this merge.
2443  if (!Reader.getContext().getLangOpts().Modules)
2444  return;
2445 
2446  // If we're not the canonical declaration, we don't need to merge.
2447  if (!DBase->isFirstDecl())
2448  return;
2449 
2450  auto *D = static_cast<T *>(DBase);
2451 
2452  if (auto *Existing = Redecl.getKnownMergeTarget())
2453  // We already know of an existing declaration we should merge with.
2454  mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2455  else if (FindExistingResult ExistingRes = findExisting(D))
2456  if (T *Existing = ExistingRes)
2457  mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2458 }
2459 
2460 /// "Cast" to type T, asserting if we don't have an implicit conversion.
2461 /// We use this to put code in a template that will only be valid for certain
2462 /// instantiations.
2463 template<typename T> static T assert_cast(T t) { return t; }
2464 template<typename T> static T assert_cast(...) {
2465  llvm_unreachable("bad assert_cast");
2466 }
2467 
2468 /// Merge together the pattern declarations from two template
2469 /// declarations.
2471  RedeclarableTemplateDecl *Existing,
2472  DeclID DsID, bool IsKeyDecl) {
2473  auto *DPattern = D->getTemplatedDecl();
2474  auto *ExistingPattern = Existing->getTemplatedDecl();
2475  RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2476  DPattern->getCanonicalDecl()->getGlobalID(),
2477  IsKeyDecl);
2478 
2479  if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2480  // Merge with any existing definition.
2481  // FIXME: This is duplicated in several places. Refactor.
2482  auto *ExistingClass =
2483  cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2484  if (auto *DDD = DClass->DefinitionData) {
2485  if (ExistingClass->DefinitionData) {
2486  MergeDefinitionData(ExistingClass, std::move(*DDD));
2487  } else {
2488  ExistingClass->DefinitionData = DClass->DefinitionData;
2489  // We may have skipped this before because we thought that DClass
2490  // was the canonical declaration.
2491  Reader.PendingDefinitions.insert(DClass);
2492  }
2493  }
2494  DClass->DefinitionData = ExistingClass->DefinitionData;
2495 
2496  return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2497  Result);
2498  }
2499  if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2500  return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2501  Result);
2502  if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2503  return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2504  if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2505  return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2506  Result);
2507  llvm_unreachable("merged an unknown kind of redeclarable template");
2508 }
2509 
2510 /// Attempts to merge the given declaration (D) with another declaration
2511 /// of the same entity.
2512 template<typename T>
2514  RedeclarableResult &Redecl,
2515  DeclID TemplatePatternID) {
2516  auto *D = static_cast<T *>(DBase);
2517  T *ExistingCanon = Existing->getCanonicalDecl();
2518  T *DCanon = D->getCanonicalDecl();
2519  if (ExistingCanon != DCanon) {
2520  assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2521  "already merged this declaration");
2522 
2523  // Have our redeclaration link point back at the canonical declaration
2524  // of the existing declaration, so that this declaration has the
2525  // appropriate canonical declaration.
2526  D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2527  D->First = ExistingCanon;
2528  ExistingCanon->Used |= D->Used;
2529  D->Used = false;
2530 
2531  // When we merge a namespace, update its pointer to the first namespace.
2532  // We cannot have loaded any redeclarations of this declaration yet, so
2533  // there's nothing else that needs to be updated.
2534  if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2535  Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2536  assert_cast<NamespaceDecl*>(ExistingCanon));
2537 
2538  // When we merge a template, merge its pattern.
2539  if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2540  mergeTemplatePattern(
2541  DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2542  TemplatePatternID, Redecl.isKeyDecl());
2543 
2544  // If this declaration is a key declaration, make a note of that.
2545  if (Redecl.isKeyDecl())
2546  Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2547  }
2548 }
2549 
2550 /// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2551 /// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2552 /// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2553 /// that some types are mergeable during deserialization, otherwise name
2554 /// lookup fails. This is the case for EnumConstantDecl.
2556  if (!ND)
2557  return false;
2558  // TODO: implement merge for other necessary decls.
2559  if (isa<EnumConstantDecl>(ND))
2560  return true;
2561  return false;
2562 }
2563 
2564 /// Attempts to merge the given declaration (D) with another declaration
2565 /// of the same entity, for the case where the entity is not actually
2566 /// redeclarable. This happens, for instance, when merging the fields of
2567 /// identical class definitions from two different modules.
2568 template<typename T>
2570  // If modules are not available, there is no reason to perform this merge.
2571  if (!Reader.getContext().getLangOpts().Modules)
2572  return;
2573 
2574  // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2575  // Note that C identically-named things in different translation units are
2576  // not redeclarations, but may still have compatible types, where ODR-like
2577  // semantics may apply.
2578  if (!Reader.getContext().getLangOpts().CPlusPlus &&
2579  !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2580  return;
2581 
2582  if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2583  if (T *Existing = ExistingRes)
2584  Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2585  Existing->getCanonicalDecl());
2586 }
2587 
2589  VisitDecl(D);
2590  unsigned NumVars = D->varlist_size();
2592  Vars.reserve(NumVars);
2593  for (unsigned i = 0; i != NumVars; ++i) {
2594  Vars.push_back(Record.readExpr());
2595  }
2596  D->setVars(Vars);
2597 }
2598 
2600  VisitValueDecl(D);
2601  D->setLocation(ReadSourceLocation());
2602  D->setCombiner(Record.readExpr());
2603  D->setInitializer(
2604  Record.readExpr(),
2605  static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt()));
2606  D->PrevDeclInScope = ReadDeclID();
2607 }
2608 
2610  VisitVarDecl(D);
2611 }
2612 
2613 //===----------------------------------------------------------------------===//
2614 // Attribute Reading
2615 //===----------------------------------------------------------------------===//
2616 
2617 /// Reads attributes from the current stream position.
2619  for (unsigned i = 0, e = Record.readInt(); i != e; ++i) {
2620  Attr *New = nullptr;
2621  auto Kind = (attr::Kind)Record.readInt();
2622  SourceRange Range = Record.readSourceRange();
2623  ASTContext &Context = getContext();
2624 
2625 #include "clang/Serialization/AttrPCHRead.inc"
2626 
2627  assert(New && "Unable to decode attribute?");
2628  Attrs.push_back(New);
2629  }
2630 }
2631 
2632 //===----------------------------------------------------------------------===//
2633 // ASTReader Implementation
2634 //===----------------------------------------------------------------------===//
2635 
2636 /// Note that we have loaded the declaration with the given
2637 /// Index.
2638 ///
2639 /// This routine notes that this declaration has already been loaded,
2640 /// so that future GetDecl calls will return this declaration rather
2641 /// than trying to load a new declaration.
2642 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2643  assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2644  DeclsLoaded[Index] = D;
2645 }
2646 
2647 /// Determine whether the consumer will be interested in seeing
2648 /// this declaration (via HandleTopLevelDecl).
2649 ///
2650 /// This routine should return true for anything that might affect
2651 /// code generation, e.g., inline function definitions, Objective-C
2652 /// declarations with metadata, etc.
2653 static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2654  // An ObjCMethodDecl is never considered as "interesting" because its
2655  // implementation container always is.
2656 
2657  // An ImportDecl or VarDecl imported from a module map module will get
2658  // emitted when we import the relevant module.
2659  if (isa<ImportDecl>(D) || isa<VarDecl>(D)) {
2660  auto *M = D->getImportedOwningModule();
2661  if (M && M->Kind == Module::ModuleMapModule &&
2662  Ctx.DeclMustBeEmitted(D))
2663  return false;
2664  }
2665 
2666  if (isa<FileScopeAsmDecl>(D) ||
2667  isa<ObjCProtocolDecl>(D) ||
2668  isa<ObjCImplDecl>(D) ||
2669  isa<ImportDecl>(D) ||
2670  isa<PragmaCommentDecl>(D) ||
2671  isa<PragmaDetectMismatchDecl>(D))
2672  return true;
2673  if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D))
2674  return !D->getDeclContext()->isFunctionOrMethod();
2675  if (const auto *Var = dyn_cast<VarDecl>(D))
2676  return Var->isFileVarDecl() &&
2677  Var->isThisDeclarationADefinition() == VarDecl::Definition;
2678  if (const auto *Func = dyn_cast<FunctionDecl>(D))
2679  return Func->doesThisDeclarationHaveABody() || HasBody;
2680 
2681  if (auto *ES = D->getASTContext().getExternalSource())
2682  if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2683  return true;
2684 
2685  return false;
2686 }
2687 
2688 /// Get the correct cursor and offset for loading a declaration.
2689 ASTReader::RecordLocation
2690 ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2691  GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2692  assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2693  ModuleFile *M = I->second;
2694  const DeclOffset &DOffs =
2695  M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2696  Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2697  return RecordLocation(M, DOffs.BitOffset);
2698 }
2699 
2700 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2701  auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2702 
2703  assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2704  return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2705 }
2706 
2707 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2708  return LocalOffset + M.GlobalBitOffset;
2709 }
2710 
2712  const TemplateParameterList *Y);
2713 
2714 /// Determine whether two template parameters are similar enough
2715 /// that they may be used in declarations of the same template.
2716 static bool isSameTemplateParameter(const NamedDecl *X,
2717  const NamedDecl *Y) {
2718  if (X->getKind() != Y->getKind())
2719  return false;
2720 
2721  if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2722  const auto *TY = cast<TemplateTypeParmDecl>(Y);
2723  return TX->isParameterPack() == TY->isParameterPack();
2724  }
2725 
2726  if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2727  const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2728  return TX->isParameterPack() == TY->isParameterPack() &&
2729  TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2730  }
2731 
2732  const auto *TX = cast<TemplateTemplateParmDecl>(X);
2733  const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2734  return TX->isParameterPack() == TY->isParameterPack() &&
2735  isSameTemplateParameterList(TX->getTemplateParameters(),
2736  TY->getTemplateParameters());
2737 }
2738 
2740  if (auto *NS = X->getAsNamespace())
2741  return NS;
2742  if (auto *NAS = X->getAsNamespaceAlias())
2743  return NAS->getNamespace();
2744  return nullptr;
2745 }
2746 
2748  const NestedNameSpecifier *Y) {
2749  if (auto *NSX = getNamespace(X)) {
2750  auto *NSY = getNamespace(Y);
2751  if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2752  return false;
2753  } else if (X->getKind() != Y->getKind())
2754  return false;
2755 
2756  // FIXME: For namespaces and types, we're permitted to check that the entity
2757  // is named via the same tokens. We should probably do so.
2758  switch (X->getKind()) {
2760  if (X->getAsIdentifier() != Y->getAsIdentifier())
2761  return false;
2762  break;
2765  // We've already checked that we named the same namespace.
2766  break;
2769  if (X->getAsType()->getCanonicalTypeInternal() !=
2771  return false;
2772  break;
2775  return true;
2776  }
2777 
2778  // Recurse into earlier portion of NNS, if any.
2779  auto *PX = X->getPrefix();
2780  auto *PY = Y->getPrefix();
2781  if (PX && PY)
2782  return isSameQualifier(PX, PY);
2783  return !PX && !PY;
2784 }
2785 
2786 /// Determine whether two template parameter lists are similar enough
2787 /// that they may be used in declarations of the same template.
2789  const TemplateParameterList *Y) {
2790  if (X->size() != Y->size())
2791  return false;
2792 
2793  for (unsigned I = 0, N = X->size(); I != N; ++I)
2794  if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2795  return false;
2796 
2797  return true;
2798 }
2799 
2800 /// Determine whether the attributes we can overload on are identical for A and
2801 /// B. Will ignore any overloadable attrs represented in the type of A and B.
2803  const FunctionDecl *B) {
2804  // Note that pass_object_size attributes are represented in the function's
2805  // ExtParameterInfo, so we don't need to check them here.
2806 
2808  // Since this is an equality check, we can ignore that enable_if attrs show up
2809  // in reverse order.
2810  for (const auto *EIA : A->specific_attrs<EnableIfAttr>())
2811  AEnableIfs.push_back(EIA);
2812 
2814  for (const auto *EIA : B->specific_attrs<EnableIfAttr>())
2815  BEnableIfs.push_back(EIA);
2816 
2817  // Two very common cases: either we have 0 enable_if attrs, or we have an
2818  // unequal number of enable_if attrs.
2819  if (AEnableIfs.empty() && BEnableIfs.empty())
2820  return true;
2821 
2822  if (AEnableIfs.size() != BEnableIfs.size())
2823  return false;
2824 
2825  llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2826  for (unsigned I = 0, E = AEnableIfs.size(); I != E; ++I) {
2827  Cand1ID.clear();
2828  Cand2ID.clear();
2829 
2830  AEnableIfs[I]->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2831  BEnableIfs[I]->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2832  if (Cand1ID != Cand2ID)
2833  return false;
2834  }
2835 
2836  return true;
2837 }
2838 
2839 /// Determine whether the two declarations refer to the same entity.
2840 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2841  assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2842 
2843  if (X == Y)
2844  return true;
2845 
2846  // Must be in the same context.
2847  if (!X->getDeclContext()->getRedeclContext()->Equals(
2849  return false;
2850 
2851  // Two typedefs refer to the same entity if they have the same underlying
2852  // type.
2853  if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
2854  if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2855  return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2856  TypedefY->getUnderlyingType());
2857 
2858  // Must have the same kind.
2859  if (X->getKind() != Y->getKind())
2860  return false;
2861 
2862  // Objective-C classes and protocols with the same name always match.
2863  if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2864  return true;
2865 
2866  if (isa<ClassTemplateSpecializationDecl>(X)) {
2867  // No need to handle these here: we merge them when adding them to the
2868  // template.
2869  return false;
2870  }
2871 
2872  // Compatible tags match.
2873  if (const auto *TagX = dyn_cast<TagDecl>(X)) {
2874  const auto *TagY = cast<TagDecl>(Y);
2875  return (TagX->getTagKind() == TagY->getTagKind()) ||
2876  ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2877  TagX->getTagKind() == TTK_Interface) &&
2878  (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2879  TagY->getTagKind() == TTK_Interface));
2880  }
2881 
2882  // Functions with the same type and linkage match.
2883  // FIXME: This needs to cope with merging of prototyped/non-prototyped
2884  // functions, etc.
2885  if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
2886  const auto *FuncY = cast<FunctionDecl>(Y);
2887  if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
2888  const auto *CtorY = cast<CXXConstructorDecl>(Y);
2889  if (CtorX->getInheritedConstructor() &&
2890  !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
2891  CtorY->getInheritedConstructor().getConstructor()))
2892  return false;
2893  }
2894 
2895  if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
2896  return false;
2897 
2898  // Multiversioned functions with different feature strings are represented
2899  // as separate declarations.
2900  if (FuncX->isMultiVersion()) {
2901  const auto *TAX = FuncX->getAttr<TargetAttr>();
2902  const auto *TAY = FuncY->getAttr<TargetAttr>();
2903  assert(TAX && TAY && "Multiversion Function without target attribute");
2904 
2905  if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
2906  return false;
2907  }
2908 
2909  ASTContext &C = FuncX->getASTContext();
2910  if (!C.hasSameType(FuncX->getType(), FuncY->getType())) {
2911  // We can get functions with different types on the redecl chain in C++17
2912  // if they have differing exception specifications and at least one of
2913  // the excpetion specs is unresolved.
2914  // FIXME: Do we need to check for C++14 deduced return types here too?
2915  auto *XFPT = FuncX->getType()->getAs<FunctionProtoType>();
2916  auto *YFPT = FuncY->getType()->getAs<FunctionProtoType>();
2917  if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
2918  (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
2920  C.hasSameFunctionTypeIgnoringExceptionSpec(FuncX->getType(),
2921  FuncY->getType()))
2922  return true;
2923  return false;
2924  }
2925  return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
2926  hasSameOverloadableAttrs(FuncX, FuncY);
2927  }
2928 
2929  // Variables with the same type and linkage match.
2930  if (const auto *VarX = dyn_cast<VarDecl>(X)) {
2931  const auto *VarY = cast<VarDecl>(Y);
2932  if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
2933  ASTContext &C = VarX->getASTContext();
2934  if (C.hasSameType(VarX->getType(), VarY->getType()))
2935  return true;
2936 
2937  // We can get decls with different types on the redecl chain. Eg.
2938  // template <typename T> struct S { static T Var[]; }; // #1
2939  // template <typename T> T S<T>::Var[sizeof(T)]; // #2
2940  // Only? happens when completing an incomplete array type. In this case
2941  // when comparing #1 and #2 we should go through their element type.
2942  const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
2943  const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
2944  if (!VarXTy || !VarYTy)
2945  return false;
2946  if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
2947  return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
2948  }
2949  return false;
2950  }
2951 
2952  // Namespaces with the same name and inlinedness match.
2953  if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
2954  const auto *NamespaceY = cast<NamespaceDecl>(Y);
2955  return NamespaceX->isInline() == NamespaceY->isInline();
2956  }
2957 
2958  // Identical template names and kinds match if their template parameter lists
2959  // and patterns match.
2960  if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
2961  const auto *TemplateY = cast<TemplateDecl>(Y);
2962  return isSameEntity(TemplateX->getTemplatedDecl(),
2963  TemplateY->getTemplatedDecl()) &&
2964  isSameTemplateParameterList(TemplateX->getTemplateParameters(),
2965  TemplateY->getTemplateParameters());
2966  }
2967 
2968  // Fields with the same name and the same type match.
2969  if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
2970  const auto *FDY = cast<FieldDecl>(Y);
2971  // FIXME: Also check the bitwidth is odr-equivalent, if any.
2972  return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
2973  }
2974 
2975  // Indirect fields with the same target field match.
2976  if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
2977  const auto *IFDY = cast<IndirectFieldDecl>(Y);
2978  return IFDX->getAnonField()->getCanonicalDecl() ==
2979  IFDY->getAnonField()->getCanonicalDecl();
2980  }
2981 
2982  // Enumerators with the same name match.
2983  if (isa<EnumConstantDecl>(X))
2984  // FIXME: Also check the value is odr-equivalent.
2985  return true;
2986 
2987  // Using shadow declarations with the same target match.
2988  if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
2989  const auto *USY = cast<UsingShadowDecl>(Y);
2990  return USX->getTargetDecl() == USY->getTargetDecl();
2991  }
2992 
2993  // Using declarations with the same qualifier match. (We already know that
2994  // the name matches.)
2995  if (const auto *UX = dyn_cast<UsingDecl>(X)) {
2996  const auto *UY = cast<UsingDecl>(Y);
2997  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2998  UX->hasTypename() == UY->hasTypename() &&
2999  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3000  }
3001  if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3002  const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3003  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3004  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3005  }
3006  if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3007  return isSameQualifier(
3008  UX->getQualifier(),
3009  cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3010 
3011  // Namespace alias definitions with the same target match.
3012  if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3013  const auto *NAY = cast<NamespaceAliasDecl>(Y);
3014  return NAX->getNamespace()->Equals(NAY->getNamespace());
3015  }
3016 
3017  return false;
3018 }
3019 
3020 /// Find the context in which we should search for previous declarations when
3021 /// looking for declarations to merge.
3022 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3023  DeclContext *DC) {
3024  if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3025  return ND->getOriginalNamespace();
3026 
3027  if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3028  // Try to dig out the definition.
3029  auto *DD = RD->DefinitionData;
3030  if (!DD)
3031  DD = RD->getCanonicalDecl()->DefinitionData;
3032 
3033  // If there's no definition yet, then DC's definition is added by an update
3034  // record, but we've not yet loaded that update record. In this case, we
3035  // commit to DC being the canonical definition now, and will fix this when
3036  // we load the update record.
3037  if (!DD) {
3038  DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3039  RD->IsCompleteDefinition = true;
3040  RD->DefinitionData = DD;
3041  RD->getCanonicalDecl()->DefinitionData = DD;
3042 
3043  // Track that we did this horrible thing so that we can fix it later.
3044  Reader.PendingFakeDefinitionData.insert(
3045  std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3046  }
3047 
3048  return DD->Definition;
3049  }
3050 
3051  if (auto *ED = dyn_cast<EnumDecl>(DC))
3052  return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3053  : nullptr;
3054 
3055  // We can see the TU here only if we have no Sema object. In that case,
3056  // there's no TU scope to look in, so using the DC alone is sufficient.
3057  if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3058  return TU;
3059 
3060  return nullptr;
3061 }
3062 
3063 ASTDeclReader::FindExistingResult::~FindExistingResult() {
3064  // Record that we had a typedef name for linkage whether or not we merge
3065  // with that declaration.
3066  if (TypedefNameForLinkage) {
3067  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3068  Reader.ImportedTypedefNamesForLinkage.insert(
3069  std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3070  return;
3071  }
3072 
3073  if (!AddResult || Existing)
3074  return;
3075 
3076  DeclarationName Name = New->getDeclName();
3077  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3079  setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3080  AnonymousDeclNumber, New);
3081  } else if (DC->isTranslationUnit() &&
3082  !Reader.getContext().getLangOpts().CPlusPlus) {
3083  if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3084  Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3085  .push_back(New);
3086  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3087  // Add the declaration to its redeclaration context so later merging
3088  // lookups will find it.
3089  MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3090  }
3091 }
3092 
3093 /// Find the declaration that should be merged into, given the declaration found
3094 /// by name lookup. If we're merging an anonymous declaration within a typedef,
3095 /// we need a matching typedef, and we merge with the type inside it.
3097  bool IsTypedefNameForLinkage) {
3098  if (!IsTypedefNameForLinkage)
3099  return Found;
3100 
3101  // If we found a typedef declaration that gives a name to some other
3102  // declaration, then we want that inner declaration. Declarations from
3103  // AST files are handled via ImportedTypedefNamesForLinkage.
3104  if (Found->isFromASTFile())
3105  return nullptr;
3106 
3107  if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3108  return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3109 
3110  return nullptr;
3111 }
3112 
3113 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3114  DeclContext *DC,
3115  unsigned Index) {
3116  // If the lexical context has been merged, look into the now-canonical
3117  // definition.
3118  if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
3119  DC = Merged;
3120 
3121  // If we've seen this before, return the canonical declaration.
3122  auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
3123  if (Index < Previous.size() && Previous[Index])
3124  return Previous[Index];
3125 
3126  // If this is the first time, but we have parsed a declaration of the context,
3127  // build the anonymous declaration list from the parsed declaration.
3128  if (!cast<Decl>(DC)->isFromASTFile()) {
3129  numberAnonymousDeclsWithin(DC, [&](NamedDecl *ND, unsigned Number) {
3130  if (Previous.size() == Number)
3131  Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3132  else
3133  Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3134  });
3135  }
3136 
3137  return Index < Previous.size() ? Previous[Index] : nullptr;
3138 }
3139 
3140 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3141  DeclContext *DC, unsigned Index,
3142  NamedDecl *D) {
3143  if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
3144  DC = Merged;
3145 
3146  auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
3147  if (Index >= Previous.size())
3148  Previous.resize(Index + 1);
3149  if (!Previous[Index])
3150  Previous[Index] = D;
3151 }
3152 
3153 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3154  DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3155  : D->getDeclName();
3156 
3157  if (!Name && !needsAnonymousDeclarationNumber(D)) {
3158  // Don't bother trying to find unnamed declarations that are in
3159  // unmergeable contexts.
3160  FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3161  AnonymousDeclNumber, TypedefNameForLinkage);
3162  Result.suppress();
3163  return Result;
3164  }
3165 
3167  if (TypedefNameForLinkage) {
3168  auto It = Reader.ImportedTypedefNamesForLinkage.find(
3169  std::make_pair(DC, TypedefNameForLinkage));
3170  if (It != Reader.ImportedTypedefNamesForLinkage.end())
3171  if (isSameEntity(It->second, D))
3172  return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3173  TypedefNameForLinkage);
3174  // Go on to check in other places in case an existing typedef name
3175  // was not imported.
3176  }
3177 
3179  // This is an anonymous declaration that we may need to merge. Look it up
3180  // in its context by number.
3181  if (auto *Existing = getAnonymousDeclForMerging(
3182  Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3183  if (isSameEntity(Existing, D))
3184  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3185  TypedefNameForLinkage);
3186  } else if (DC->isTranslationUnit() &&
3187  !Reader.getContext().getLangOpts().CPlusPlus) {
3188  IdentifierResolver &IdResolver = Reader.getIdResolver();
3189 
3190  // Temporarily consider the identifier to be up-to-date. We don't want to
3191  // cause additional lookups here.
3192  class UpToDateIdentifierRAII {
3193  IdentifierInfo *II;
3194  bool WasOutToDate = false;
3195 
3196  public:
3197  explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3198  if (II) {
3199  WasOutToDate = II->isOutOfDate();
3200  if (WasOutToDate)
3201  II->setOutOfDate(false);
3202  }
3203  }
3204 
3205  ~UpToDateIdentifierRAII() {
3206  if (WasOutToDate)
3207  II->setOutOfDate(true);
3208  }
3209  } UpToDate(Name.getAsIdentifierInfo());
3210 
3211  for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3212  IEnd = IdResolver.end();
3213  I != IEnd; ++I) {
3214  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3215  if (isSameEntity(Existing, D))
3216  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3217  TypedefNameForLinkage);
3218  }
3219  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3220  DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3221  for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3222  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3223  if (isSameEntity(Existing, D))
3224  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3225  TypedefNameForLinkage);
3226  }
3227  } else {
3228  // Not in a mergeable context.
3229  return FindExistingResult(Reader);
3230  }
3231 
3232  // If this declaration is from a merged context, make a note that we need to
3233  // check that the canonical definition of that context contains the decl.
3234  //
3235  // FIXME: We should do something similar if we merge two definitions of the
3236  // same template specialization into the same CXXRecordDecl.
3237  auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3238  if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3239  MergedDCIt->second == D->getDeclContext())
3240  Reader.PendingOdrMergeChecks.push_back(D);
3241 
3242  return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3243  AnonymousDeclNumber, TypedefNameForLinkage);
3244 }
3245 
3246 template<typename DeclT>
3248  return D->RedeclLink.getLatestNotUpdated();
3249 }
3250 
3252  llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3253 }
3254 
3256  assert(D);
3257 
3258  switch (D->getKind()) {
3259 #define ABSTRACT_DECL(TYPE)
3260 #define DECL(TYPE, BASE) \
3261  case Decl::TYPE: \
3262  return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3263 #include "clang/AST/DeclNodes.inc"
3264  }
3265  llvm_unreachable("unknown decl kind");
3266 }
3267 
3268 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3270 }
3271 
3272 template<typename DeclT>
3275  Decl *Previous, Decl *Canon) {
3276  D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3277  D->First = cast<DeclT>(Previous)->First;
3278 }
3279 
3280 namespace clang {
3281 
3282 template<>
3285  Decl *Previous, Decl *Canon) {
3286  auto *VD = static_cast<VarDecl *>(D);
3287  auto *PrevVD = cast<VarDecl>(Previous);
3288  D->RedeclLink.setPrevious(PrevVD);
3289  D->First = PrevVD->First;
3290 
3291  // We should keep at most one definition on the chain.
3292  // FIXME: Cache the definition once we've found it. Building a chain with
3293  // N definitions currently takes O(N^2) time here.
3294  if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3295  for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3296  if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3297  Reader.mergeDefinitionVisibility(CurD, VD);
3298  VD->demoteThisDefinitionToDeclaration();
3299  break;
3300  }
3301  }
3302  }
3303 }
3304 
3305 template<>
3308  Decl *Previous, Decl *Canon) {
3309  auto *FD = static_cast<FunctionDecl *>(D);
3310  auto *PrevFD = cast<FunctionDecl>(Previous);
3311 
3312  FD->RedeclLink.setPrevious(PrevFD);
3313  FD->First = PrevFD->First;
3314 
3315  // If the previous declaration is an inline function declaration, then this
3316  // declaration is too.
3317  if (PrevFD->IsInline != FD->IsInline) {
3318  // FIXME: [dcl.fct.spec]p4:
3319  // If a function with external linkage is declared inline in one
3320  // translation unit, it shall be declared inline in all translation
3321  // units in which it appears.
3322  //
3323  // Be careful of this case:
3324  //
3325  // module A:
3326  // template<typename T> struct X { void f(); };
3327  // template<typename T> inline void X<T>::f() {}
3328  //
3329  // module B instantiates the declaration of X<int>::f
3330  // module C instantiates the definition of X<int>::f
3331  //
3332  // If module B and C are merged, we do not have a violation of this rule.
3333  FD->IsInline = true;
3334  }
3335 
3336  // If we need to propagate an exception specification along the redecl
3337  // chain, make a note of that so that we can do so later.
3338  auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3339  auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3340  if (FPT && PrevFPT) {
3341  bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3342  bool WasUnresolved =
3344  if (IsUnresolved != WasUnresolved)
3345  Reader.PendingExceptionSpecUpdates.insert(
3346  std::make_pair(Canon, IsUnresolved ? PrevFD : FD));
3347  }
3348 }
3349 
3350 } // namespace clang
3351 
3353  llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3354 }
3355 
3356 /// Inherit the default template argument from \p From to \p To. Returns
3357 /// \c false if there is no default template for \p From.
3358 template <typename ParmDecl>
3359 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3360  Decl *ToD) {
3361  auto *To = cast<ParmDecl>(ToD);
3362  if (!From->hasDefaultArgument())
3363  return false;
3364  To->setInheritedDefaultArgument(Context, From);
3365  return true;
3366 }
3367 
3369  TemplateDecl *From,
3370  TemplateDecl *To) {
3371  auto *FromTP = From->getTemplateParameters();
3372  auto *ToTP = To->getTemplateParameters();
3373  assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3374 
3375  for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3376  NamedDecl *FromParam = FromTP->getParam(N - I - 1);
3377  if (FromParam->isParameterPack())
3378  continue;
3379  NamedDecl *ToParam = ToTP->getParam(N - I - 1);
3380 
3381  if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam)) {
3382  if (!inheritDefaultTemplateArgument(Context, FTTP, ToParam))
3383  break;
3384  } else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam)) {
3385  if (!inheritDefaultTemplateArgument(Context, FNTTP, ToParam))
3386  break;
3387  } else {
3389  Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam))
3390  break;
3391  }
3392  }
3393 }
3394 
3396  Decl *Previous, Decl *Canon) {
3397  assert(D && Previous);
3398 
3399  switch (D->getKind()) {
3400 #define ABSTRACT_DECL(TYPE)
3401 #define DECL(TYPE, BASE) \
3402  case Decl::TYPE: \
3403  attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3404  break;
3405 #include "clang/AST/DeclNodes.inc"
3406  }
3407 
3408  // If the declaration was visible in one module, a redeclaration of it in
3409  // another module remains visible even if it wouldn't be visible by itself.
3410  //
3411  // FIXME: In this case, the declaration should only be visible if a module
3412  // that makes it visible has been imported.
3413  D->IdentifierNamespace |=
3414  Previous->IdentifierNamespace &
3416 
3417  // If the declaration declares a template, it may inherit default arguments
3418  // from the previous declaration.
3419  if (auto *TD = dyn_cast<TemplateDecl>(D))
3421  cast<TemplateDecl>(Previous), TD);
3422 }
3423 
3424 template<typename DeclT>
3426  D->RedeclLink.setLatest(cast<DeclT>(Latest));
3427 }
3428 
3430  llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3431 }
3432 
3434  assert(D && Latest);
3435 
3436  switch (D->getKind()) {
3437 #define ABSTRACT_DECL(TYPE)
3438 #define DECL(TYPE, BASE) \
3439  case Decl::TYPE: \
3440  attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3441  break;
3442 #include "clang/AST/DeclNodes.inc"
3443  }
3444 }
3445 
3446 template<typename DeclT>
3448  D->RedeclLink.markIncomplete();
3449 }
3450 
3452  llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3453 }
3454 
3455 void ASTReader::markIncompleteDeclChain(Decl *D) {
3456  switch (D->getKind()) {
3457 #define ABSTRACT_DECL(TYPE)
3458 #define DECL(TYPE, BASE) \
3459  case Decl::TYPE: \
3460  ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3461  break;
3462 #include "clang/AST/DeclNodes.inc"
3463  }
3464 }
3465 
3466 /// Read the declaration at the given offset from the AST file.
3467 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3468  unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3469  SourceLocation DeclLoc;
3470  RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3471  llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3472  // Keep track of where we are in the stream, then jump back there
3473  // after reading this declaration.
3474  SavedStreamPosition SavedPosition(DeclsCursor);
3475 
3476  ReadingKindTracker ReadingKind(Read_Decl, *this);
3477 
3478  // Note that we are loading a declaration record.
3479  Deserializing ADecl(this);
3480 
3481  DeclsCursor.JumpToBit(Loc.Offset);
3482  ASTRecordReader Record(*this, *Loc.F);
3483  ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3484  unsigned Code = DeclsCursor.ReadCode();
3485 
3486  ASTContext &Context = getContext();
3487  Decl *D = nullptr;
3488  switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3489  case DECL_CONTEXT_LEXICAL:
3490  case DECL_CONTEXT_VISIBLE:
3491  llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3492  case DECL_TYPEDEF:
3493  D = TypedefDecl::CreateDeserialized(Context, ID);
3494  break;
3495  case DECL_TYPEALIAS:
3496  D = TypeAliasDecl::CreateDeserialized(Context, ID);
3497  break;
3498  case DECL_ENUM:
3499  D = EnumDecl::CreateDeserialized(Context, ID);
3500  break;
3501  case DECL_RECORD:
3502  D = RecordDecl::CreateDeserialized(Context, ID);
3503  break;
3504  case DECL_ENUM_CONSTANT:
3505  D = EnumConstantDecl::CreateDeserialized(Context, ID);
3506  break;
3507  case DECL_FUNCTION:
3508  D = FunctionDecl::CreateDeserialized(Context, ID);
3509  break;
3510  case DECL_LINKAGE_SPEC:
3511  D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3512  break;
3513  case DECL_EXPORT:
3514  D = ExportDecl::CreateDeserialized(Context, ID);
3515  break;
3516  case DECL_LABEL:
3517  D = LabelDecl::CreateDeserialized(Context, ID);
3518  break;
3519  case DECL_NAMESPACE:
3520  D = NamespaceDecl::CreateDeserialized(Context, ID);
3521  break;
3522  case DECL_NAMESPACE_ALIAS:
3523  D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3524  break;
3525  case DECL_USING:
3526  D = UsingDecl::CreateDeserialized(Context, ID);
3527  break;
3528  case DECL_USING_PACK:
3529  D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3530  break;
3531  case DECL_USING_SHADOW:
3532  D = UsingShadowDecl::CreateDeserialized(Context, ID);
3533  break;
3536  break;
3537  case DECL_USING_DIRECTIVE:
3538  D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3539  break;
3542  break;
3545  break;
3546  case DECL_CXX_RECORD:
3547  D = CXXRecordDecl::CreateDeserialized(Context, ID);
3548  break;
3551  break;
3552  case DECL_CXX_METHOD:
3553  D = CXXMethodDecl::CreateDeserialized(Context, ID);
3554  break;
3555  case DECL_CXX_CONSTRUCTOR:
3556  D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3557  break;
3559  D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3560  break;
3561  case DECL_CXX_DESTRUCTOR:
3562  D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3563  break;
3564  case DECL_CXX_CONVERSION:
3565  D = CXXConversionDecl::CreateDeserialized(Context, ID);
3566  break;
3567  case DECL_ACCESS_SPEC:
3568  D = AccessSpecDecl::CreateDeserialized(Context, ID);
3569  break;
3570  case DECL_FRIEND:
3571  D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3572  break;
3573  case DECL_FRIEND_TEMPLATE:
3574  D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3575  break;
3576  case DECL_CLASS_TEMPLATE:
3577  D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3578  break;
3581  break;
3584  break;
3585  case DECL_VAR_TEMPLATE:
3586  D = VarTemplateDecl::CreateDeserialized(Context, ID);
3587  break;
3590  break;
3593  break;
3596  break;
3599  break;
3602  break;
3605  break;
3608  Record.readInt());
3609  break;
3612  break;
3615  Record.readInt());
3616  break;
3619  break;
3620  case DECL_STATIC_ASSERT:
3621  D = StaticAssertDecl::CreateDeserialized(Context, ID);
3622  break;
3623  case DECL_OBJC_METHOD:
3624  D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3625  break;
3626  case DECL_OBJC_INTERFACE:
3627  D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3628  break;
3629  case DECL_OBJC_IVAR:
3630  D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3631  break;
3632  case DECL_OBJC_PROTOCOL:
3633  D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3634  break;
3636  D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3637  break;
3638  case DECL_OBJC_CATEGORY:
3639  D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3640  break;
3643  break;
3646  break;
3649  break;
3650  case DECL_OBJC_PROPERTY:
3651  D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3652  break;
3655  break;
3656  case DECL_FIELD:
3657  D = FieldDecl::CreateDeserialized(Context, ID);
3658  break;
3659  case DECL_INDIRECTFIELD:
3660  D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3661  break;
3662  case DECL_VAR:
3663  D = VarDecl::CreateDeserialized(Context, ID);
3664  break;
3665  case DECL_IMPLICIT_PARAM:
3666  D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3667  break;
3668  case DECL_PARM_VAR:
3669  D = ParmVarDecl::CreateDeserialized(Context, ID);
3670  break;
3671  case DECL_DECOMPOSITION:
3672  D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3673  break;
3674  case DECL_BINDING:
3675  D = BindingDecl::CreateDeserialized(Context, ID);
3676  break;
3677  case DECL_FILE_SCOPE_ASM:
3678  D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3679  break;
3680  case DECL_BLOCK:
3681  D = BlockDecl::CreateDeserialized(Context, ID);
3682  break;
3683  case DECL_MS_PROPERTY:
3684  D = MSPropertyDecl::CreateDeserialized(Context, ID);
3685  break;
3686  case DECL_CAPTURED:
3687  D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3688  break;
3690  Error("attempt to read a C++ base-specifier record as a declaration");
3691  return nullptr;
3693  Error("attempt to read a C++ ctor initializer record as a declaration");
3694  return nullptr;
3695  case DECL_IMPORT:
3696  // Note: last entry of the ImportDecl record is the number of stored source
3697  // locations.
3698  D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3699  break;
3701  D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3702  break;
3705  break;
3706  case DECL_OMP_CAPTUREDEXPR:
3707  D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3708  break;
3709  case DECL_PRAGMA_COMMENT:
3710  D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3711  break;
3714  Record.readInt());
3715  break;
3716  case DECL_EMPTY:
3717  D = EmptyDecl::CreateDeserialized(Context, ID);
3718  break;
3719  case DECL_OBJC_TYPE_PARAM:
3720  D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3721  break;
3722  }
3723 
3724  assert(D && "Unknown declaration reading AST file");
3725  LoadedDecl(Index, D);
3726  // Set the DeclContext before doing any deserialization, to make sure internal
3727  // calls to Decl::getASTContext() by Decl's methods will find the
3728  // TranslationUnitDecl without crashing.
3729  D->setDeclContext(Context.getTranslationUnitDecl());
3730  Reader.Visit(D);
3731 
3732  // If this declaration is also a declaration context, get the
3733  // offsets for its tables of lexical and visible declarations.
3734  if (auto *DC = dyn_cast<DeclContext>(D)) {
3735  std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3736  if (Offsets.first &&
3737  ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3738  return nullptr;
3739  if (Offsets.second &&
3740  ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3741  return nullptr;
3742  }
3743  assert(Record.getIdx() == Record.size());
3744 
3745  // Load any relevant update records.
3746  PendingUpdateRecords.push_back(
3747  PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3748 
3749  // Load the categories after recursive loading is finished.
3750  if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3751  // If we already have a definition when deserializing the ObjCInterfaceDecl,
3752  // we put the Decl in PendingDefinitions so we can pull the categories here.
3753  if (Class->isThisDeclarationADefinition() ||
3754  PendingDefinitions.count(Class))
3755  loadObjCCategories(ID, Class);
3756 
3757  // If we have deserialized a declaration that has a definition the
3758  // AST consumer might need to know about, queue it.
3759  // We don't pass it to the consumer immediately because we may be in recursive
3760  // loading, and some declarations may still be initializing.
3761  PotentiallyInterestingDecls.push_back(
3762  InterestingDecl(D, Reader.hasPendingBody()));
3763 
3764  return D;
3765 }
3766 
3767 void ASTReader::PassInterestingDeclsToConsumer() {
3768  assert(Consumer);
3769 
3770  if (PassingDeclsToConsumer)
3771  return;
3772 
3773  // Guard variable to avoid recursively redoing the process of passing
3774  // decls to consumer.
3775  SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3776  true);
3777 
3778  // Ensure that we've loaded all potentially-interesting declarations
3779  // that need to be eagerly loaded.
3780  for (auto ID : EagerlyDeserializedDecls)
3781  GetDecl(ID);
3782  EagerlyDeserializedDecls.clear();
3783 
3784  while (!PotentiallyInterestingDecls.empty()) {
3785  InterestingDecl D = PotentiallyInterestingDecls.front();
3786  PotentiallyInterestingDecls.pop_front();
3787  if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3788  PassInterestingDeclToConsumer(D.getDecl());
3789  }
3790 }
3791 
3792 void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3793  // The declaration may have been modified by files later in the chain.
3794  // If this is the case, read the record containing the updates from each file
3795  // and pass it to ASTDeclReader to make the modifications.
3796  serialization::GlobalDeclID ID = Record.ID;
3797  Decl *D = Record.D;
3798  ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3799  DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3800 
3801  SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3802 
3803  if (UpdI != DeclUpdateOffsets.end()) {
3804  auto UpdateOffsets = std::move(UpdI->second);
3805  DeclUpdateOffsets.erase(UpdI);
3806 
3807  // Check if this decl was interesting to the consumer. If we just loaded
3808  // the declaration, then we know it was interesting and we skip the call
3809  // to isConsumerInterestedIn because it is unsafe to call in the
3810  // current ASTReader state.
3811  bool WasInteresting =
3812  Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
3813  for (auto &FileAndOffset : UpdateOffsets) {
3814  ModuleFile *F = FileAndOffset.first;
3815  uint64_t Offset = FileAndOffset.second;
3816  llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3817  SavedStreamPosition SavedPosition(Cursor);
3818  Cursor.JumpToBit(Offset);
3819  unsigned Code = Cursor.ReadCode();
3820  ASTRecordReader Record(*this, *F);
3821  unsigned RecCode = Record.readRecord(Cursor, Code);
3822  (void)RecCode;
3823  assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3824 
3825  ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
3826  SourceLocation());
3827  Reader.UpdateDecl(D, PendingLazySpecializationIDs);
3828 
3829  // We might have made this declaration interesting. If so, remember that
3830  // we need to hand it off to the consumer.
3831  if (!WasInteresting &&
3832  isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
3833  PotentiallyInterestingDecls.push_back(
3834  InterestingDecl(D, Reader.hasPendingBody()));
3835  WasInteresting = true;
3836  }
3837  }
3838  }
3839  // Add the lazy specializations to the template.
3840  assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||
3841  isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&
3842  "Must not have pending specializations");
3843  if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
3844  ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
3845  else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
3846  ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
3847  else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
3848  ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
3849  PendingLazySpecializationIDs.clear();
3850 
3851  // Load the pending visible updates for this decl context, if it has any.
3852  auto I = PendingVisibleUpdates.find(ID);
3853  if (I != PendingVisibleUpdates.end()) {
3854  auto VisibleUpdates = std::move(I->second);
3855  PendingVisibleUpdates.erase(I);
3856 
3857  auto *DC = cast<DeclContext>(D)->getPrimaryContext();
3858  for (const auto &Update : VisibleUpdates)
3859  Lookups[DC].Table.add(
3860  Update.Mod, Update.Data,
3862  DC->setHasExternalVisibleStorage(true);
3863  }
3864 }
3865 
3866 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
3867  // Attach FirstLocal to the end of the decl chain.
3868  Decl *CanonDecl = FirstLocal->getCanonicalDecl();
3869  if (FirstLocal != CanonDecl) {
3870  Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
3872  *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
3873  CanonDecl);
3874  }
3875 
3876  if (!LocalOffset) {
3877  ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
3878  return;
3879  }
3880 
3881  // Load the list of other redeclarations from this module file.
3882  ModuleFile *M = getOwningModuleFile(FirstLocal);
3883  assert(M && "imported decl from no module file");
3884 
3885  llvm::BitstreamCursor &Cursor = M->DeclsCursor;
3886  SavedStreamPosition SavedPosition(Cursor);
3887  Cursor.JumpToBit(LocalOffset);
3888 
3889  RecordData Record;
3890  unsigned Code = Cursor.ReadCode();
3891  unsigned RecCode = Cursor.readRecord(Code, Record);
3892  (void)RecCode;
3893  assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
3894 
3895  // FIXME: We have several different dispatches on decl kind here; maybe
3896  // we should instead generate one loop per kind and dispatch up-front?
3897  Decl *MostRecent = FirstLocal;
3898  for (unsigned I = 0, N = Record.size(); I != N; ++I) {
3899  auto *D = GetLocalDecl(*M, Record[N - I - 1]);
3900  ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
3901  MostRecent = D;
3902  }
3903  ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
3904 }
3905 
3906 namespace {
3907 
3908  /// Given an ObjC interface, goes through the modules and links to the
3909  /// interface all the categories for it.
3910  class ObjCCategoriesVisitor {
3911  ASTReader &Reader;
3912  ObjCInterfaceDecl *Interface;
3913  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
3914  ObjCCategoryDecl *Tail = nullptr;
3915  llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
3916  serialization::GlobalDeclID InterfaceID;
3917  unsigned PreviousGeneration;
3918 
3919  void add(ObjCCategoryDecl *Cat) {
3920  // Only process each category once.
3921  if (!Deserialized.erase(Cat))
3922  return;
3923 
3924  // Check for duplicate categories.
3925  if (Cat->getDeclName()) {
3926  ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
3927  if (Existing &&
3928  Reader.getOwningModuleFile(Existing)
3929  != Reader.getOwningModuleFile(Cat)) {
3930  // FIXME: We should not warn for duplicates in diamond:
3931  //
3932  // MT //
3933  // / \ //
3934  // ML MR //
3935  // \ / //
3936  // MB //
3937  //
3938  // If there are duplicates in ML/MR, there will be warning when
3939  // creating MB *and* when importing MB. We should not warn when
3940  // importing.
3941  Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
3942  << Interface->getDeclName() << Cat->getDeclName();
3943  Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
3944  } else if (!Existing) {
3945  // Record this category.
3946  Existing = Cat;
3947  }
3948  }
3949 
3950  // Add this category to the end of the chain.
3951  if (Tail)
3953  else
3954  Interface->setCategoryListRaw(Cat);
3955  Tail = Cat;
3956  }
3957 
3958  public:
3959  ObjCCategoriesVisitor(ASTReader &Reader,
3960  ObjCInterfaceDecl *Interface,
3961  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
3962  serialization::GlobalDeclID InterfaceID,
3963  unsigned PreviousGeneration)
3964  : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
3965  InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
3966  // Populate the name -> category map with the set of known categories.
3967  for (auto *Cat : Interface->known_categories()) {
3968  if (Cat->getDeclName())
3969  NameCategoryMap[Cat->getDeclName()] = Cat;
3970 
3971  // Keep track of the tail of the category list.
3972  Tail = Cat;
3973  }
3974  }
3975 
3976  bool operator()(ModuleFile &M) {
3977  // If we've loaded all of the category information we care about from
3978  // this module file, we're done.
3979  if (M.Generation <= PreviousGeneration)
3980  return true;
3981 
3982  // Map global ID of the definition down to the local ID used in this
3983  // module file. If there is no such mapping, we'll find nothing here
3984  // (or in any module it imports).
3985  DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
3986  if (!LocalID)
3987  return true;
3988 
3989  // Perform a binary search to find the local redeclarations for this
3990  // declaration (if any).
3991  const ObjCCategoriesInfo Compare = { LocalID, 0 };
3992  const ObjCCategoriesInfo *Result
3993  = std::lower_bound(M.ObjCCategoriesMap,
3995  Compare);
3996  if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
3997  Result->DefinitionID != LocalID) {
3998  // We didn't find anything. If the class definition is in this module
3999  // file, then the module files it depends on cannot have any categories,
4000  // so suppress further lookup.
4001  return Reader.isDeclIDFromModule(InterfaceID, M);
4002  }
4003 
4004  // We found something. Dig out all of the categories.
4005  unsigned Offset = Result->Offset;
4006  unsigned N = M.ObjCCategories[Offset];
4007  M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4008  for (unsigned I = 0; I != N; ++I)
4009  add(cast_or_null<ObjCCategoryDecl>(
4010  Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4011  return true;
4012  }
4013  };
4014 
4015 } // namespace
4016 
4017 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4018  ObjCInterfaceDecl *D,
4019  unsigned PreviousGeneration) {
4020  ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4021  PreviousGeneration);
4022  ModuleMgr.visit(Visitor);
4023 }
4024 
4025 template<typename DeclT, typename Fn>
4026 static void forAllLaterRedecls(DeclT *D, Fn F) {
4027  F(D);
4028 
4029  // Check whether we've already merged D into its redeclaration chain.
4030  // MostRecent may or may not be nullptr if D has not been merged. If
4031  // not, walk the merged redecl chain and see if it's there.
4032  auto *MostRecent = D->getMostRecentDecl();
4033  bool Found = false;
4034  for (auto *Redecl = MostRecent; Redecl && !Found;
4035  Redecl = Redecl->getPreviousDecl())
4036  Found = (Redecl == D);
4037 
4038  // If this declaration is merged, apply the functor to all later decls.
4039  if (Found) {
4040  for (auto *Redecl = MostRecent; Redecl != D;
4041  Redecl = Redecl->getPreviousDecl())
4042  F(Redecl);
4043  }
4044 }
4045 
4047  llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4048  while (Record.getIdx() < Record.size()) {
4049  switch ((DeclUpdateKind)Record.readInt()) {
4051  auto *RD = cast<CXXRecordDecl>(D);
4052  // FIXME: If we also have an update record for instantiating the
4053  // definition of D, we need that to happen before we get here.
4054  Decl *MD = Record.readDecl();
4055  assert(MD && "couldn't read decl from update record");
4056  // FIXME: We should call addHiddenDecl instead, to add the member
4057  // to its DeclContext.
4058  RD->addedMember(MD);
4059  break;
4060  }
4061 
4063  // It will be added to the template's lazy specialization set.
4064  PendingLazySpecializationIDs.push_back(ReadDeclID());
4065  break;
4066 
4068  auto *Anon = ReadDeclAs<NamespaceDecl>();
4069 
4070  // Each module has its own anonymous namespace, which is disjoint from
4071  // any other module's anonymous namespaces, so don't attach the anonymous
4072  // namespace at all.
4073  if (!Record.isModule()) {
4074  if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4075  TU->setAnonymousNamespace(Anon);
4076  else
4077  cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4078  }
4079  break;
4080  }
4081 
4083  auto *VD = cast<VarDecl>(D);
4084  VD->NonParmVarDeclBits.IsInline = Record.readInt();
4085  VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4086  uint64_t Val = Record.readInt();
4087  if (Val && !VD->getInit()) {
4088  VD->setInit(Record.readExpr());
4089  if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4090  EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4091  Eval->CheckedICE = true;
4092  Eval->IsICE = Val == 3;
4093  }
4094  }
4095  break;
4096  }
4097 
4099  SourceLocation POI = Record.readSourceLocation();
4100  if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4101  VTSD->setPointOfInstantiation(POI);
4102  } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4103  VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4104  } else {
4105  auto *FD = cast<FunctionDecl>(D);
4106  if (auto *FTSInfo = FD->TemplateOrSpecialization
4107  .dyn_cast<FunctionTemplateSpecializationInfo *>())
4108  FTSInfo->setPointOfInstantiation(POI);
4109  else
4110  FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4111  ->setPointOfInstantiation(POI);
4112  }
4113  break;
4114  }
4115 
4117  auto *Param = cast<ParmVarDecl>(D);
4118 
4119  // We have to read the default argument regardless of whether we use it
4120  // so that hypothetical further update records aren't messed up.
4121  // TODO: Add a function to skip over the next expr record.
4122  auto *DefaultArg = Record.readExpr();
4123 
4124  // Only apply the update if the parameter still has an uninstantiated
4125  // default argument.
4126  if (Param->hasUninstantiatedDefaultArg())
4127  Param->setDefaultArg(DefaultArg);
4128  break;
4129  }
4130 
4132  auto *FD = cast<FieldDecl>(D);
4133  auto *DefaultInit = Record.readExpr();
4134 
4135  // Only apply the update if the field still has an uninstantiated
4136  // default member initializer.
4137  if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4138  if (DefaultInit)
4139  FD->setInClassInitializer(DefaultInit);
4140  else
4141  // Instantiation failed. We can get here if we serialized an AST for
4142  // an invalid program.
4143  FD->removeInClassInitializer();
4144  }
4145  break;
4146  }
4147 
4149  auto *FD = cast<FunctionDecl>(D);
4150  if (Reader.PendingBodies[FD]) {
4151  // FIXME: Maybe check for ODR violations.
4152  // It's safe to stop now because this update record is always last.
4153  return;
4154  }
4155 
4156  if (Record.readInt()) {
4157  // Maintain AST consistency: any later redeclarations of this function
4158  // are inline if this one is. (We might have merged another declaration
4159  // into this one.)
4160  forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4161  FD->setImplicitlyInline();
4162  });
4163  }
4164  FD->setInnerLocStart(ReadSourceLocation());
4165  ReadFunctionDefinition(FD);
4166  assert(Record.getIdx() == Record.size() && "lazy body must be last");
4167  break;
4168  }
4169 
4171  auto *RD = cast<CXXRecordDecl>(D);
4172  auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4173  bool HadRealDefinition =
4174  OldDD && (OldDD->Definition != RD ||
4175  !Reader.PendingFakeDefinitionData.count(OldDD));
4176  RD->setParamDestroyedInCallee(Record.readInt());
4177  RD->setArgPassingRestrictions(
4178  (RecordDecl::ArgPassingKind)Record.readInt());
4179  ReadCXXRecordDefinition(RD, /*Update*/true);
4180 
4181  // Visible update is handled separately.
4182  uint64_t LexicalOffset = ReadLocalOffset();
4183  if (!HadRealDefinition && LexicalOffset) {
4184  Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4185  Reader.PendingFakeDefinitionData.erase(OldDD);
4186  }
4187 
4188  auto TSK = (TemplateSpecializationKind)Record.readInt();
4189  SourceLocation POI = ReadSourceLocation();
4190  if (MemberSpecializationInfo *MSInfo =
4191  RD->getMemberSpecializationInfo()) {
4192  MSInfo->setTemplateSpecializationKind(TSK);
4193  MSInfo->setPointOfInstantiation(POI);
4194  } else {
4195  auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4196  Spec->setTemplateSpecializationKind(TSK);
4197  Spec->setPointOfInstantiation(POI);
4198 
4199  if (Record.readInt()) {
4200  auto *PartialSpec =
4201  ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4203  Record.readTemplateArgumentList(TemplArgs);
4204  auto *TemplArgList = TemplateArgumentList::CreateCopy(
4205  Reader.getContext(), TemplArgs);
4206 
4207  // FIXME: If we already have a partial specialization set,
4208  // check that it matches.
4209  if (!Spec->getSpecializedTemplateOrPartial()
4211  Spec->setInstantiationOf(PartialSpec, TemplArgList);
4212  }
4213  }
4214 
4215  RD->setTagKind((TagTypeKind)Record.readInt());
4216  RD->setLocation(ReadSourceLocation());
4217  RD->setLocStart(ReadSourceLocation());
4218  RD->setBraceRange(ReadSourceRange());
4219 
4220  if (Record.readInt()) {
4221  AttrVec Attrs;
4222  Record.readAttributes(Attrs);
4223  // If the declaration already has attributes, we assume that some other
4224  // AST file already loaded them.
4225  if (!D->hasAttrs())
4226  D->setAttrsImpl(Attrs, Reader.getContext());
4227  }
4228  break;
4229  }
4230 
4232  // Set the 'operator delete' directly to avoid emitting another update
4233  // record.
4234  auto *Del = ReadDeclAs<FunctionDecl>();
4235  auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4236  auto *ThisArg = Record.readExpr();
4237  // FIXME: Check consistency if we have an old and new operator delete.
4238  if (!First->OperatorDelete) {
4239  First->OperatorDelete = Del;
4240  First->OperatorDeleteThisArg = ThisArg;
4241  }
4242  break;
4243  }
4244 
4247  SmallVector<QualType, 8> ExceptionStorage;
4248  Record.readExceptionSpec(ExceptionStorage, ESI);
4249 
4250  // Update this declaration's exception specification, if needed.
4251  auto *FD = cast<FunctionDecl>(D);
4252  auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4253  // FIXME: If the exception specification is already present, check that it
4254  // matches.
4255  if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4256  FD->setType(Reader.getContext().getFunctionType(
4257  FPT->getReturnType(), FPT->getParamTypes(),
4258  FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4259 
4260  // When we get to the end of deserializing, see if there are other decls
4261  // that we need to propagate this exception specification onto.
4262  Reader.PendingExceptionSpecUpdates.insert(
4263  std::make_pair(FD->getCanonicalDecl(), FD));
4264  }
4265  break;
4266  }
4267 
4269  // FIXME: Also do this when merging redecls.
4270  QualType DeducedResultType = Record.readType();
4271  for (auto *Redecl : merged_redecls(D)) {
4272  // FIXME: If the return type is already deduced, check that it matches.
4273  auto *FD = cast<FunctionDecl>(Redecl);
4275  DeducedResultType);
4276  }
4277  break;
4278  }
4279 
4280  case UPD_DECL_MARKED_USED:
4281  // Maintain AST consistency: any later redeclarations are used too.
4282  D->markUsed(Reader.getContext());
4283  break;
4284 
4285  case UPD_MANGLING_NUMBER:
4286  Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4287  Record.readInt());
4288  break;
4289 
4291  Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4292  Record.readInt());
4293  break;
4294 
4296  D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4297  ReadSourceRange()));
4298  break;
4299 
4300  case UPD_DECL_EXPORTED: {
4301  unsigned SubmoduleID = readSubmoduleID();
4302  auto *Exported = cast<NamedDecl>(D);
4303  if (auto *TD = dyn_cast<TagDecl>(Exported))
4304  Exported = TD->getDefinition();
4305  Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4306  if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
4307  Reader.getContext().mergeDefinitionIntoModule(cast<NamedDecl>(Exported),
4308  Owner);
4309  Reader.PendingMergedDefinitionsToDeduplicate.insert(
4310  cast<NamedDecl>(Exported));
4311  } else if (Owner && Owner->NameVisibility != Module::AllVisible) {
4312  // If Owner is made visible at some later point, make this declaration
4313  // visible too.
4314  Reader.HiddenNamesMap[Owner].push_back(Exported);
4315  } else {
4316  // The declaration is now visible.
4317  Exported->setVisibleDespiteOwningModule();
4318  }
4319  break;
4320  }
4321 
4324  AttrVec Attrs;
4325  Record.readAttributes(Attrs);
4326  assert(Attrs.size() == 1);
4327  D->addAttr(Attrs[0]);
4328  break;
4329  }
4330  }
4331 }
const uint64_t & readInt()
Returns the current value in this record, and advances to the next value.
Definition: ASTReader.h:2376
RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD)
void VisitTypeDecl(TypeDecl *TD)
void setCategoryNameLoc(SourceLocation Loc)
Definition: DeclObjC.h:2433
A FriendTemplateDecl record.
Definition: ASTBitCodes.h:1379
Defines the clang::ASTContext interface.
A NonTypeTemplateParmDecl record.
Definition: ASTBitCodes.h:1406
void setScopeInfo(unsigned scopeDepth, unsigned parameterIndex)
Definition: Decl.h:1566
Decl * GetLocalDecl(ModuleFile &F, uint32_t LocalID)
Reads a declaration with the given local ID in the given module.
Definition: ASTReader.h:1822
SourceLocation readSourceLocation()
Read a source location, advancing Idx.
Definition: ASTReader.h:2568
void VisitClassScopeFunctionSpecializationDecl(ClassScopeFunctionSpecializationDecl *D)
static const Decl * getCanonicalDecl(const Decl *D)
void setImplicit(bool I=true)
Definition: DeclBase.h:553
Represents a function declaration or definition.
Definition: Decl.h:1714
void setNonTrivialToPrimitiveDestroy(bool V)
Definition: Decl.h:3692
void VisitVarDecl(VarDecl *VD)
#define MATCH_FIELD(Field)
void setAnonymousStructOrUnion(bool Anon)
Definition: Decl.h:3654
A class which contains all the information about a particular captured value.
Definition: Decl.h:3842
static ImportDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumLocations)
Create a new, deserialized module import declaration.
Definition: Decl.cpp:4546
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
void VisitImportDecl(ImportDecl *D)
A (possibly-)qualified type.
Definition: Type.h:654
void mergeMergeable(Mergeable< T > *D)
Attempts to merge the given declaration (D) with another declaration of the same entity, for the case where the entity is not actually redeclarable.
static ObjCIvarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:1738
FunctionDecl * Function
The function template specialization that this structure describes.
Definition: DeclTemplate.h:530
Static storage duration.
Definition: Specifiers.h:278
void setDefaultArgument(TypeSourceInfo *DefArg)
Set the default argument for this template parameter.
void VisitUsingDecl(UsingDecl *D)
static UnresolvedUsingValueDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2719
static VarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:1905
void setLParenLoc(SourceLocation L)
Definition: DeclObjC.h:842
bool tryAddTopLevelDecl(NamedDecl *D, DeclarationName Name)
Try to add the given declaration to the top level scope, if it (or a redeclaration of it) hasn&#39;t alre...
void VisitFieldDecl(FieldDecl *FD)
void VisitImplicitParamDecl(ImplicitParamDecl *PD)
This declaration has an owning module, but is only visible to lookups that occur within that module...
An OMPThreadPrivateDecl record.
Definition: ASTBitCodes.h:1442
void setNonTrivialToPrimitiveDefaultInitialize(bool V)
Definition: Decl.h:3676
void VisitObjCIvarDecl(ObjCIvarDecl *D)
#define OR_FIELD(Field)
void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D)
static void setNextObjCCategory(ObjCCategoryDecl *Cat, ObjCCategoryDecl *Next)
bool IsICE
Whether this statement is an integral constant expression, or in C++11, whether the statement is a co...
Definition: Decl.h:801
RedeclarableResult VisitClassTemplateSpecializationDeclImpl(ClassTemplateSpecializationDecl *D)
An instance of this object exists for each enum constant that is defined.
Definition: Decl.h:2728
void setEmbeddedInDeclarator(bool isInDeclarator)
Definition: Decl.h:3175
No linkage, which means that the entity is unique and can only be referred to from within its scope...
Definition: Linkage.h:27
StorageClass getStorageClass() const
Returns the storage class as written in the source.
Definition: Decl.h:1017
unsigned Generation
The generation of which this module file is a part.
Definition: Module.h:172
static AccessSpecDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:59
Represents the declaration of a typedef-name via the &#39;typedef&#39; type specifier.
Definition: Decl.h:2960
C Language Family Type Representation.
void setParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4066
Microsoft&#39;s &#39;__super&#39; specifier, stored as a CXXRecordDecl* of the class it appeared in...
An OMPDeclareReductionDecl record.
Definition: ASTBitCodes.h:1460
void VisitEnumConstantDecl(EnumConstantDecl *ECD)
static PragmaCommentDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned ArgSize)
Definition: Decl.cpp:4200
static void attachLatestDeclImpl(Redeclarable< DeclT > *D, Decl *Latest)
unsigned getNumExpansionTypes() const
Retrieves the number of expansion types in an expanded parameter pack.
Module * getSubmodule(serialization::SubmoduleID GlobalID)
Retrieve the submodule that corresponds to a global submodule ID.
Definition: ASTReader.cpp:8361
Defines the clang::Module class, which describes a module in the source code.
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
static NamedDecl * getDeclForMerging(NamedDecl *Found, bool IsTypedefNameForLinkage)
Find the declaration that should be merged into, given the declaration found by name lookup...
A VarTemplatePartialSpecializationDecl record.
Definition: ASTBitCodes.h:1397
void setArgPassingRestrictions(ArgPassingKind Kind)
Definition: Decl.h:3707
Selector getObjCSelector() const
getObjCSelector - Get the Objective-C selector stored in this declaration name.
NestedNameSpecifier * getPrefix() const
Return the prefix of this nested name specifier.
void setDefaultArgument(const ASTContext &C, const TemplateArgumentLoc &DefArg)
Set the default argument for this template parameter, and whether that default argument was inherited...
Defines the C++ template declaration subclasses.
NamedDecl * getTemplatedDecl() const
Get the underlying, templated declaration.
Definition: DeclTemplate.h:453
static Decl * getMostRecentDecl(Decl *D)
known_categories_range known_categories() const
Definition: DeclObjC.h:1706
void VisitCXXDestructorDecl(CXXDestructorDecl *D)
void VisitClassTemplateSpecializationDecl(ClassTemplateSpecializationDecl *D)
A record that stores the set of declarations that are lexically stored within a given DeclContext...
Definition: ASTBitCodes.h:1304
void VisitObjCCategoryDecl(ObjCCategoryDecl *D)
bool isExpandedParameterPack() const
Whether this parameter is a template template parameter pack that has a known list of different templ...
Represents an empty-declaration.
Definition: Decl.h:4230
bool isOutOfDate() const
Determine whether the information for this identifier is out of date with respect to the external sou...
void setParams(ArrayRef< ParmVarDecl *> NewParamInfo)
Definition: Decl.cpp:4138
unsigned LocalNumObjCCategoriesInMap
The number of redeclaration info entries in ObjCCategoriesMap.
Definition: Module.h:436
Class that performs name lookup into a DeclContext stored in an AST file.
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2629
Declaration of a variable template.
Represent a C++ namespace.
Definition: Decl.h:514
A ObjCPropertyDecl record.
Definition: ASTBitCodes.h:1261
void setPropertyImplementation(PropertyControl pc)
Definition: DeclObjC.h:946
static bool hasSameOverloadableAttrs(const FunctionDecl *A, const FunctionDecl *B)
Determine whether the attributes we can overload on are identical for A and B.
NamedDecl * getParam(unsigned Idx)
Definition: DeclTemplate.h:133
static FriendDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned FriendTypeNumTPLists)
Definition: DeclFriend.cpp:66
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:96
A container of type source information.
Definition: Decl.h:86
uint64_t GlobalBitOffset
The global bit offset (or base) of this module.
Definition: Module.h:182
void readQualifierInfo(QualifierInfo &Info)
Definition: ASTReader.h:2514
void setPropertyAccessor(bool isAccessor)
Definition: DeclObjC.h:460
static void inheritDefaultTemplateArguments(ASTContext &Context, TemplateDecl *From, TemplateDecl *To)
ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record, ASTReader::RecordLocation Loc, DeclID thisDeclID, SourceLocation ThisDeclLoc)
Describes the capture of a variable or of this, or of a C++1y init-capture.
Definition: LambdaCapture.h:26
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2448
This is a module that was defined by a module map and built out of header files.
Definition: Module.h:76
static CapturedDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumParams)
Definition: Decl.cpp:4333
QualType getElementType() const
Definition: Type.h:2664
Represents a #pragma comment line.
Definition: Decl.h:139
A ClassTemplateDecl record.
Definition: ASTBitCodes.h:1382
void VisitStaticAssertDecl(StaticAssertDecl *D)
A PragmaDetectMismatchDecl record.
Definition: ASTBitCodes.h:1457
An UnresolvedUsingTypenameDecl record.
Definition: ASTBitCodes.h:1343
An identifier, stored as an IdentifierInfo*.
void setNothrow(bool Nothrow=true)
Definition: Decl.cpp:4343
void setRAngleLoc(SourceLocation Loc)
Definition: TemplateBase.h:566
FriendDecl - Represents the declaration of a friend entity, which can be a function, a type, or a templated function or type.
Definition: DeclFriend.h:54
Represents a variable declaration or definition.
Definition: Decl.h:812
void VisitNamedDecl(NamedDecl *ND)
Declaration of a redeclarable template.
Definition: DeclTemplate.h:737
An OMPCapturedExprDecl record.
Definition: ASTBitCodes.h:1451
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6397
A UsingShadowDecl record.
Definition: ASTBitCodes.h:1331
const unsigned int NUM_PREDEF_DECL_IDS
The number of declaration IDs that are predefined.
Definition: ASTBitCodes.h:1198
The "__interface" keyword.
Definition: Type.h:4767
Represents a variable template specialization, which refers to a variable template with a given set o...
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
A TemplateTemplateParmDecl record that stores an expanded template template parameter pack...
Definition: ASTBitCodes.h:1432
A namespace, stored as a NamespaceDecl*.
void VisitClassTemplateDecl(ClassTemplateDecl *D)
Stores a list of template parameters for a TemplateDecl and its derived classes.
Definition: DeclTemplate.h:68
unsigned getODRHash() const
Definition: DeclCXX.cpp:471
void setSelfDecl(ImplicitParamDecl *SD)
Definition: DeclObjC.h:445
void VisitTypeAliasDecl(TypeAliasDecl *TD)
SpecifierKind getKind() const
Determine what kind of nested name specifier is stored.
bool isParameterPack() const
Whether this declaration is a parameter pack.
Definition: DeclBase.cpp:211
unsigned IsExplicitSpecified
Definition: Decl.h:1743
A TemplateTemplateParmDecl record.
Definition: ASTBitCodes.h:1409
Represents a parameter to a function.
Definition: Decl.h:1533
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:24
A ObjCInterfaceDecl record.
Definition: ASTBitCodes.h:1237
void setHasExternalVisibleStorage(bool ES=true)
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:1911
Module * getSubmodule(serialization::SubmoduleID GlobalID)
Retrieve the submodule that corresponds to a global submodule ID.
Definition: ASTReader.h:2391
Represents the builtin template declaration which is used to implement __make_integer_seq and other b...
RedeclarableResult VisitTagDecl(TagDecl *TD)
iterator begin(DeclarationName Name)
begin - Returns an iterator for decls with the name &#39;Name&#39;.
static void attachPreviousDeclImpl(ASTReader &Reader, Redeclarable< DeclT > *D, Decl *Previous, Decl *Canon)
Types, declared with &#39;struct foo&#39;, typedefs, etc.
Definition: DeclBase.h:130
A CXXConstructorDecl record for an inherited constructor.
Definition: ASTBitCodes.h:1364
Represents a struct/union/class.
Definition: Decl.h:3548
Description of a constructor that was inherited from a base class.
Definition: DeclCXX.h:2422
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:297
Provides common interface for the Decls that can be redeclared.
Definition: Redeclarable.h:87
ObjCProtocolDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this Objective-C protocol.
Definition: DeclObjC.h:2269
Represents a class template specialization, which refers to a class template with a given set of temp...
One of these records is kept for each identifier that is lexed.
void setIntegerType(QualType T)
Set the underlying integer type.
Definition: Decl.h:3431
T * readDeclAs()
Reads a declaration from the given position in the record, advancing Idx.
Definition: ASTReader.h:2490
void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D)
void mergeRedeclarable(Redeclarable< T > *D, RedeclarableResult &Redecl, DeclID TemplatePatternID=0)
Attempts to merge the given declaration (D) with another declaration of the same entity.
static OMPThreadPrivateDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned N)
Definition: DeclOpenMP.cpp:41
void setManglingNumber(const NamedDecl *ND, unsigned Number)
void setCompleteDefinition(bool V)
Definition: Decl.h:3206
void setUninstantiatedDefaultArg(Expr *arg)
Definition: Decl.cpp:2576
static IndirectFieldDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4379
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:150
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1188
bool CheckedICE
Whether we already checked whether this statement was an integral constant expression.
Definition: Decl.h:792
void VisitFriendTemplateDecl(FriendTemplateDecl *D)
void setLanguage(LanguageIDs L)
Set the language specified by this linkage specification.
Definition: DeclCXX.h:2843
LambdaCaptureKind
The different capture forms in a lambda introducer.
Definition: Lambda.h:34
Represents a member of a struct/union/class.
Definition: Decl.h:2521
void setBlockMissingReturnType(bool val)
Definition: Decl.h:3975
const Type * getAsType() const
Retrieve the type stored in this nested name specifier.
Defines the ExceptionSpecificationType enumeration and various utility functions. ...
void setLocStart(SourceLocation L)
Definition: Decl.h:496
static CXXRecordDecl * CreateDeserialized(const ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:157
void setVisibleDespiteOwningModule()
Set that this declaration is globally visible, even if it came from a module that is not visible...
Definition: DeclBase.h:778
ArgPassingKind
Enum that represents the different ways arguments are passed to and returned from function calls...
Definition: Decl.h:3554
RedeclarableResult VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D)
TODO: Unify with ClassTemplateSpecializationDecl version? May require unifying ClassTemplate(Partial)...
void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D)
static TemplateArgumentList * CreateCopy(ASTContext &Context, ArrayRef< TemplateArgument > Args)
Create a new template argument list that copies the given set of template arguments.
CXXMethodDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:2097
Helper class that saves the current stream position and then restores it when destroyed.
Definition: ASTReader.h:2629
static NamespaceDecl * getNamespace(const NestedNameSpecifier *X)
void setOwningModuleID(unsigned ID)
Set the owning module ID.
Definition: DeclBase.h:628
void setStaticLocalNumber(const VarDecl *VD, unsigned Number)
void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD)
This declaration is definitely a definition.
Definition: Decl.h:1150
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1461
unsigned FromASTFile
Whether this declaration was loaded from an AST file.
Definition: DeclBase.h:323
void Profile(llvm::FoldingSetNodeID &ID)
Definition: DeclTemplate.h:591
Defines the clang::attr::Kind enum.
clang::CharUnits operator*(clang::CharUnits::QuantityType Scale, const clang::CharUnits &CU)
Definition: CharUnits.h:208
void setNumPositiveBits(unsigned Num)
Definition: Decl.h:3451
Represents an access specifier followed by colon &#39;:&#39;.
Definition: DeclCXX.h:132
void setReturnType(QualType T)
Definition: DeclObjC.h:362
Declaration of a function specialization at template class scope.
static StaticAssertDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2767
TypeSourceInfo * getTypeSourceInfo()
Reads a declarator info from the given record, advancing Idx.
Definition: ASTReader.h:2457
void VisitLabelDecl(LabelDecl *LD)
for(const auto &A :T->param_types())
static NamespaceDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2516
void setDeclImplementation(ImplementationControl ic)
Definition: DeclObjC.h:498
Describes a module or submodule.
Definition: Module.h:65
void setDefaultArgument(Expr *DefArg)
Set the default argument for this template parameter, and whether that default argument was inherited...
A IndirectFieldDecl record.
Definition: ASTBitCodes.h:1424
size_t size() const
The length of this record.
Definition: ASTReader.h:2366
static OMPCapturedExprDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclOpenMP.cpp:98
iterator end()
end - Returns an iterator that has &#39;finished&#39;.
Provides information about a function template specialization, which is a FunctionDecl that has been ...
Definition: DeclTemplate.h:508
Represents a C++ using-declaration.
Definition: DeclCXX.h:3330
void setUsingLoc(SourceLocation L)
Set the source location of the &#39;using&#39; keyword.
Definition: DeclCXX.h:3366
void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D)
IdentifierInfo * getAsIdentifier() const
Retrieve the identifier stored in this nested name specifier.
static llvm::iterator_range< MergedRedeclIterator< DeclT > > merged_redecls(DeclT *D)
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:986
void setAccessControl(AccessControl ac)
Definition: DeclObjC.h:2001
static void attachLatestDecl(Decl *D, Decl *latest)
< Capturing the *this object by copy
Definition: Lambda.h:37
RedeclarableResult VisitVarDeclImpl(VarDecl *D)
DeclLink RedeclLink
Points to the next redeclaration in the chain.
Definition: Redeclarable.h:190
An AccessSpecDecl record.
Definition: ASTBitCodes.h:1373
void setAtLoc(SourceLocation L)
Definition: DeclObjC.h:839
A convenient class for passing around template argument information.
Definition: TemplateBase.h:546
void setParamDestroyedInCallee(bool V)
Definition: Decl.h:3715
uint32_t Offset
Definition: CacheTokens.cpp:43
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
A ConstructorUsingShadowDecl record.
Definition: ASTBitCodes.h:1334
A UsingDirecitveDecl record.
Definition: ASTBitCodes.h:1337
void ReadFunctionDefinition(FunctionDecl *FD)
NamespaceAliasDecl * getAsNamespaceAlias() const
Retrieve the namespace alias stored in this nested name specifier.
static UnresolvedUsingTypenameDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2749
void VisitCXXRecordDecl(CXXRecordDecl *D)
static ClassTemplateSpecializationDecl * CreateDeserialized(ASTContext &C, unsigned ID)
void setSuperClass(ObjCInterfaceDecl *superCls)
Definition: DeclObjC.h:2712
A DecompositionDecl record.
Definition: ASTBitCodes.h:1282
Represents a declaration of a type.
Definition: Decl.h:2816
void setHasObjectMember(bool val)
Definition: Decl.h:3659
void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D)
void VisitMSPropertyDecl(MSPropertyDecl *FD)
static ObjCCategoryImplDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:2011
void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D)
ASTContext & getContext()
Retrieve the AST context that this AST reader supplements.
Definition: ASTReader.h:2282
MemberSpecializationInfo * getMemberSpecializationInfo() const
If this enumeration is an instantiation of a member enumeration of a class template specialization...
Definition: Decl.h:3529
DeclID VisitTemplateDecl(TemplateDecl *D)
SourceRange readSourceRange()
Read a source range, advancing Idx.
Definition: ASTReader.h:2573
void setClassInterface(ObjCInterfaceDecl *D)
Definition: DeclObjC.h:2768
CXXRecordDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:728
static FileScopeAsmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4481
void VisitCXXMethodDecl(CXXMethodDecl *D)
void UpdateDecl(Decl *D, SmallVectorImpl< serialization::DeclID > &)
Defines the Linkage enumeration and various utility functions.
static TypeAliasDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4451
A ClassTemplateSpecializationDecl record.
Definition: ASTBitCodes.h:1385
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2083
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:826
void setNumNegativeBits(unsigned Num)
Definition: Decl.h:3468
static bool isSameEntity(NamedDecl *X, NamedDecl *Y)
Determine whether the two declarations refer to the same entity.
static FunctionTemplateSpecializationInfo * Create(ASTContext &C, FunctionDecl *FD, FunctionTemplateDecl *Template, TemplateSpecializationKind TSK, const TemplateArgumentList *TemplateArgs, const TemplateArgumentListInfo *TemplateArgsAsWritten, SourceLocation POI)
Represents the body of a CapturedStmt, and serves as its DeclContext.
Definition: Decl.h:4015
Represents an ObjC class declaration.
Definition: DeclObjC.h:1191
Represents a linkage specification.
Definition: DeclCXX.h:2794
static ParmVarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:2518
void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D)
CXXRecordDecl * getTemplatedDecl() const
Get the underlying class declarations of the template.
A binding in a decomposition declaration.
Definition: DeclCXX.h:3773
MemberSpecializationInfo * getMemberSpecializationInfo() const
If this function is an instantiation of a member function of a class template specialization, retrieves the member specialization information.
Definition: Decl.cpp:3264
void setInitVal(const llvm::APSInt &V)
Definition: Decl.h:2752
Ordinary names.
Definition: DeclBase.h:144
void setInitExpr(Expr *E)
Definition: Decl.h:2751
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:395
void setLocStart(SourceLocation L)
Definition: Decl.h:2844
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:875
void setGetterCXXConstructor(Expr *getterCXXConstructor)
Definition: DeclObjC.h:2872
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1539
StorageDuration getStorageDuration() const
Get the storage duration of this variable, per C++ [basic.stc].
Definition: Decl.h:1078
bool isExpandedParameterPack() const
Whether this parameter is a non-type template parameter pack that has a known list of different types...
void setInline(bool Inline)
Set whether this is an inline namespace declaration.
Definition: Decl.h:580
static CXXDeductionGuideDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:1825
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2778
llvm::FoldingSetVector< FunctionTemplateSpecializationInfo > Specializations
The function template specializations for this function template, including explicit specializations ...
Definition: DeclTemplate.h:977
void adjustDeducedFunctionResultType(FunctionDecl *FD, QualType ResultType)
Change the result type of a function type once it is deduced.
void setVariadic(bool isVar)
Definition: DeclObjC.h:455
static TemplateTypeParmDecl * CreateDeserialized(const ASTContext &C, unsigned ID)
Represents the declaration of a typedef-name via a C++11 alias-declaration.
Definition: Decl.h:2980
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3348
RedeclarableResult VisitRedeclarable(Redeclarable< T > *D)
void setHasDestructors(bool val)
Definition: DeclObjC.h:2679
void VisitObjCContainerDecl(ObjCContainerDecl *D)
static ObjCCompatibleAliasDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:2162
void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D)
CXXDestructorDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:2711
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:688
A CXXDeductionGuideDecl record.
Definition: ASTBitCodes.h:1355
void VisitParmVarDecl(ParmVarDecl *PD)
void VisitLinkageSpecDecl(LinkageSpecDecl *D)
void setIvarRBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2716
A StaticAssertDecl record.
Definition: ASTBitCodes.h:1415
A VarTemplateSpecializationDecl record.
Definition: ASTBitCodes.h:1394
void VisitUsingPackDecl(UsingPackDecl *D)
void VisitUsingShadowDecl(UsingShadowDecl *D)
void VisitVarTemplatePartialSpecializationDecl(VarTemplatePartialSpecializationDecl *D)
TODO: Unify with ClassTemplatePartialSpecializationDecl version? May require unifying ClassTemplate(P...
void setNextIvar(ObjCIvarDecl *ivar)
Definition: DeclObjC.h:1999
void setSynthesize(bool synth)
Definition: DeclObjC.h:2009
void VisitFriendDecl(FriendDecl *D)
An ObjCTypeParamDecl record.
Definition: ASTBitCodes.h:1448
void VisitDecl(Decl *D)
A record containing CXXBaseSpecifiers.
Definition: ASTBitCodes.h:1418
DiagnosticBuilder Diag(unsigned DiagID) const
Report a diagnostic.
Definition: ASTReader.cpp:9010
void setType(QualType T, TypeSourceInfo *TSI)
Definition: DeclObjC.h:848
TemplateParameterList * getTemplateParameters() const
Get the list of template parameters.
Definition: DeclTemplate.h:432
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:881
void setGetterMethodDecl(ObjCMethodDecl *gDecl)
Definition: DeclObjC.h:940
Represents a shadow constructor declaration introduced into a class by a C++11 using-declaration that...
Definition: DeclCXX.h:3218
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3838
NamespaceDecl * getAsNamespace() const
Retrieve the namespace stored in this nested name specifier.
Represent the declaration of a variable (in which case it is an lvalue) a function (in which case it ...
Definition: Decl.h:636
Expr - This represents one expression.
Definition: Expr.h:106
A ObjCCategoryImplDecl record.
Definition: ASTBitCodes.h:1252
Defines the clang::LangOptions interface.
void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD)
void setBitWidth(Expr *Width)
Set the bit-field width for this member.
Definition: Decl.h:2623
static LinkageSpecDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2461
A ObjCPropertyImplDecl record.
Definition: ASTBitCodes.h:1264
const FunctionProtoType * T
StateNode * Previous
Declaration of a template type parameter.
void setSetterMethodDecl(ObjCMethodDecl *gDecl)
Definition: DeclObjC.h:943
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2671
const internal::VariadicAllOfMatcher< Decl > decl
Matches declarations.
void setInit(Expr *I)
Definition: Decl.cpp:2185
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:132
A CXXConstructorDecl record.
Definition: ASTBitCodes.h:1361
void VisitTypedefDecl(TypedefDecl *TD)
Module * getImportedOwningModule() const
Get the imported owning module, if this decl is from an imported (non-local) module.
Definition: DeclBase.h:727
void setContextParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4084
void setAtEndRange(SourceRange atEnd)
Definition: DeclObjC.h:1141
void setRBraceLoc(SourceLocation L)
Definition: DeclCXX.h:2855
static DeclLink PreviousDeclLink(decl_type *D)
Definition: Redeclarable.h:171
DeclContext * getDeclContext()
Definition: DeclBase.h:426
A record containing CXXCtorInitializers.
Definition: ASTBitCodes.h:1421
A VarTemplateDecl record.
Definition: ASTBitCodes.h:1391
IdentifierResolver - Keeps track of shadowed decls on enclosing scopes.
static ObjCTypeParamList * create(ASTContext &ctx, SourceLocation lAngleLoc, ArrayRef< ObjCTypeParamDecl *> typeParams, SourceLocation rAngleLoc)
Create a new Objective-C type parameter list.
Definition: DeclObjC.cpp:1388
void setMemberSpecialization()
Note that this member template is a specialization.
Definition: DeclTemplate.h:884
Decl * readDecl()
Reads a declaration from the given position in a record in the given module, advancing Idx...
Definition: ASTReader.h:2480
NonTypeTemplateParmDecl - Declares a non-type template parameter, e.g., "Size" in.
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:1965
void setDefined(bool isDefined)
Definition: DeclObjC.h:463
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:201
void setCompleteDefinitionRequired(bool V=true)
Definition: Decl.h:3208
RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D)
Information about a module that has been loaded by the ASTReader.
Definition: Module.h:108
A namespace alias, stored as a NamespaceAliasDecl*.
static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous, Decl *Canon)
IdentifierInfo * getAsIdentifierInfo() const
getAsIdentifierInfo - Retrieve the IdentifierInfo * stored in this declaration name, or NULL if this declaration name isn&#39;t a simple identifier.
const uint64_t & back() const
The last element in this record.
Definition: ASTReader.h:2372
A CXXDestructorDecl record.
Definition: ASTBitCodes.h:1367
SmallVector< uint64_t, 1 > ObjCCategories
The Objective-C category lists for categories known to this module.
Definition: Module.h:440
unsigned IsCopyDeductionCandidate
[C++17] Only used by CXXDeductionGuideDecl.
Definition: Decl.h:1786
A NonTypeTemplateParmDecl record that stores an expanded non-type template parameter pack...
Definition: ASTBitCodes.h:1428
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
static NamespaceAliasDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2578
static CXXConstructorDecl * CreateDeserialized(ASTContext &C, unsigned ID, bool InheritsConstructor)
Definition: DeclCXX.cpp:2247
bool isFunctionOrMethod() const
Definition: DeclBase.h:1390
StorageClass
Storage classes.
Definition: Specifiers.h:204
void mergeClassExtensionProtocolList(ObjCProtocolDecl *const *List, unsigned Num, ASTContext &C)
mergeClassExtensionProtocolList - Merge class extension&#39;s protocol list into the protocol list for th...
Definition: DeclObjC.cpp:426
static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody)
Determine whether the consumer will be interested in seeing this declaration (via HandleTopLevelDecl)...
PragmaMSCommentKind
Definition: PragmaKinds.h:15
This declaration has an owning module, and is visible when that module is imported.
A NamespaceAliasDecl record.
Definition: ASTBitCodes.h:1322
void setTypename(bool TN)
Sets whether the using declaration has &#39;typename&#39;.
Definition: DeclCXX.h:3388
Declaration of an alias template.
unsigned IsScopedUsingClassTag
If this tag declaration is a scoped enum, then this is true if the scoped enum was declared using the...
Definition: Decl.h:3047
void setModedTypeSourceInfo(TypeSourceInfo *unmodedTSI, QualType modedTy)
Definition: Decl.h:2924
unsigned getNumExpansionTemplateParameters() const
Retrieves the number of expansion template parameters in an expanded parameter pack.
QualType getFunctionType(QualType ResultTy, ArrayRef< QualType > Args, const FunctionProtoType::ExtProtoInfo &EPI) const
Return a normal function type with a typed argument list.
Definition: ASTContext.h:1342
void setLocation(SourceLocation L)
Definition: DeclBase.h:418
TemplateTemplateParmDecl - Declares a template template parameter, e.g., "T" in.
void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D)
An ImplicitParamDecl record.
Definition: ASTBitCodes.h:1276
void setIvarRBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2437
void VisitDecompositionDecl(DecompositionDecl *DD)
Represents a C++ deduction guide declaration.
Definition: DeclCXX.h:1963
Represents a C++ conversion function within a class.
Definition: DeclCXX.h:2733
static UsingDirectiveDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2482
An EnumConstantDecl record.
Definition: ASTBitCodes.h:1228
static ObjCTypeParamDecl * CreateDeserialized(ASTContext &ctx, unsigned ID)
Definition: DeclObjC.cpp:1355
std::string readString()
Read a string, advancing Idx.
Definition: ASTReader.h:2593
void VisitNamespaceAliasDecl(NamespaceAliasDecl *D)
An ImportDecl recording a module import.
Definition: ASTBitCodes.h:1439
A ObjCCategoryDecl record.
Definition: ASTBitCodes.h:1249
void setDeclContext(DeclContext *DC)
setDeclContext - Set both the semantic and lexical DeclContext to DC.
Definition: DeclBase.cpp:295
static ObjCMethodDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:784
static void AddLazySpecializations(T *D, SmallVectorImpl< serialization::DeclID > &IDs)
decl_type * getFirstDecl()
Return the first declaration of this declaration or itself if this is the only declaration.
Definition: Redeclarable.h:220
void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D)
void VisitObjCProtocolDecl(ObjCProtocolDecl *D)
A ObjCCompatibleAliasDecl record.
Definition: ASTBitCodes.h:1258
bool hasAttrs() const
Definition: DeclBase.h:472
void VisitPragmaCommentDecl(PragmaCommentDecl *D)
void mergeDefinitionVisibility(NamedDecl *Def, NamedDecl *MergedDef)
Note that MergedDef is a redefinition of the canonical definition Def, so Def should be visible whene...
Definition: ASTReader.cpp:3763
static TypeAliasTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty alias template node.
unsigned readRecord(llvm::BitstreamCursor &Cursor, unsigned AbbrevID)
Reads a record with id AbbrevID from Cursor, resetting the internal state.
void setIsVariadic(bool value)
Definition: Decl.h:3917
void addAttr(Attr *A)
Definition: DeclBase.h:485
static bool isSameQualifier(const NestedNameSpecifier *X, const NestedNameSpecifier *Y)
void VisitCXXConstructorDecl(CXXConstructorDecl *D)
static PragmaDetectMismatchDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NameValueSize)
Definition: Decl.cpp:4226
uint32_t SubmoduleID
An ID number that refers to a submodule in a module file.
Definition: ASTBitCodes.h:172
Represents a C++ Modules TS module export declaration.
Definition: Decl.h:4185
A struct with extended info about a syntactic name qualifier, to be used for the case of out-of-line ...
Definition: Decl.h:661
void setColonLoc(SourceLocation CLoc)
Sets the location of the colon.
Definition: DeclCXX.h:157
An UnresolvedUsingValueDecl record.
Definition: ASTBitCodes.h:1340
The "struct" keyword.
Definition: Type.h:4764
void VisitDeclaratorDecl(DeclaratorDecl *DD)
static ObjCProtocolDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:1821
static EnumConstantDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4353
Kind
static UsingShadowDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2602
decl_type * getPreviousDecl()
Return the previous declaration of this declaration or NULL if this is the first declaration.
Definition: Redeclarable.h:208
void setIsConversionFromLambda(bool val)
Definition: Decl.h:3978
static void markIncompleteDeclChainImpl(Redeclarable< DeclT > *D)
static CXXDestructorDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2391
Encodes a location in the source.
static EmptyDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4493
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:591
static TemplateTemplateParmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:789
This represents &#39;#pragma omp declare reduction ...&#39; directive.
Definition: DeclOpenMP.h:102
A record that stores the set of declarations that are visible from a given DeclContext.
Definition: ASTBitCodes.h:1313
Pseudo declaration for capturing expressions.
Definition: DeclOpenMP.h:187
void setIvarLBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2435
void setBraceRange(SourceRange R)
Definition: Decl.h:3134
void setAtStartLoc(SourceLocation Loc)
Definition: DeclObjC.h:1134
void VisitEmptyDecl(EmptyDecl *D)
void setAnonymousNamespace(NamespaceDecl *D)
Definition: Decl.h:601
NameVisibilityKind NameVisibility
The visibility of names within this particular module.
Definition: Module.h:275
void setFreeStanding(bool isFreeStanding=true)
Definition: Decl.h:3180
void setObjCDeclQualifier(ObjCDeclQualifier QV)
Definition: DeclObjC.h:302
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3006
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:376
static DecompositionDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumBindings)
Definition: DeclCXX.cpp:2810
Defines several types used to describe C++ lambda expressions that are shared between the parser and ...
void setReferenced(bool R=true)
Definition: DeclBase.h:582
Represents the declaration of a label.
Definition: Decl.h:468
void mergeTemplatePattern(RedeclarableTemplateDecl *D, RedeclarableTemplateDecl *Existing, DeclID DsID, bool IsKeyDecl)
Merge together the pattern declarations from two template declarations.
void setPropertyAttributesAsWritten(PropertyAttributeKind PRVal)
Definition: DeclObjC.h:873
Represents a dependent using declaration which was not marked with typename.
Definition: DeclCXX.h:3549
void setPosition(unsigned P)
void VisitObjCImplDecl(ObjCImplDecl *D)
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2016
void setHasFlexibleArrayMember(bool V)
Definition: Decl.h:3640
EnumDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.h:3347
Represents a C++ nested name specifier, such as "\::std::vector<int>::".
void VisitBindingDecl(BindingDecl *BD)
A TemplateTypeParmDecl record.
Definition: ASTBitCodes.h:1403
This file defines OpenMP nodes for declarative directives.
bool isFirstDecl() const
True if this is the first declaration in its redeclaration chain.
Definition: Redeclarable.h:227
Data that is common to all of the declarations of a given function template.
Definition: DeclTemplate.h:974
const ArrayType * getAsArrayType(QualType T) const
Type Query functions.
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2299
QualType getInjectedClassNameSpecialization()
Retrieve the template specialization type of the injected-class-name for this class template...
void readDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name)
Definition: ASTReader.h:2507
void addDecl(NamedDecl *D)
Definition: UnresolvedSet.h:89
void setDeclName(DeclarationName N)
Set the name of this declaration.
Definition: Decl.h:300
static MSPropertyDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2846
SourceLocation getLocation() const
Definition: ASTBitCodes.h:236
static ConstructorUsingShadowDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2625
Describes the categories of an Objective-C class.
Definition: ASTBitCodes.h:1949
bool isDeclIDFromModule(serialization::GlobalDeclID ID, ModuleFile &M) const
Returns true if global DeclID ID originated from module M.
Definition: ASTReader.cpp:7123
void init(NamedDecl *templatedDecl, TemplateParameterList *templateParams)
Initialize the underlying templated declaration and template parameters.
Definition: DeclTemplate.h:497
void setTagKind(TagKind TK)
Definition: Decl.h:3220
unsigned getIdx() const
The current position in this record.
Definition: ASTReader.h:2363
CommonBase * Common
Pointer to the common data shared by all declarations of this template.
Definition: DeclTemplate.h:825
static FunctionDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4309
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:746
void setProtocolList(ObjCProtocolDecl *const *List, unsigned Num, const SourceLocation *Locs, ASTContext &C)
setProtocolList - Set the list of protocols that this interface implements.
Definition: DeclObjC.h:2363
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:700
uint32_t TypeID
An ID number that refers to a type in an AST file.
Definition: ASTBitCodes.h:86
void setInitializer(Expr *E, InitKind IK)
Set initializer expression for the declare reduction construct.
Definition: DeclOpenMP.h:159
A simple visitor class that helps create declaration visitors.
Definition: DeclVisitor.h:70
const unsigned int DECL_UPDATES
Record of updates for a declaration that was modified after being deserialized.
Definition: ASTBitCodes.h:1202
void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D)
void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D)
void VisitRecordDecl(RecordDecl *RD)
static T assert_cast(T t)
"Cast" to type T, asserting if we don&#39;t have an implicit conversion.
serialization::SubmoduleID getGlobalSubmoduleID(unsigned LocalID)
Retrieve the global submodule ID its local ID number.
Definition: ASTReader.h:2386
static VarTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty variable template node.
A NamespaceDecl record.
Definition: ASTBitCodes.h:1319
Represents a C++11 static_assert declaration.
Definition: DeclCXX.h:3724
__DEVICE__ void * memcpy(void *__a, const void *__b, size_t __c)
uint32_t BitOffset
Offset in the AST file.
Definition: ASTBitCodes.h:226
void setLAngleLoc(SourceLocation Loc)
Definition: TemplateBase.h:565
void VisitExportDecl(ExportDecl *D)
void addArgument(const TemplateArgumentLoc &Loc)
Definition: TemplateBase.h:586
File is a PCH file treated as the actual main file.
Definition: Module.h:57
ExceptionSpecificationType getExceptionSpecType() const
Get the kind of exception specification on this function.
Definition: Type.h:3619
Describes a module import declaration, which makes the contents of the named module visible in the cu...
Definition: Decl.h:4120
serialization::DeclID readDeclID()
Reads a declaration ID from the given position in this record.
Definition: ASTReader.h:2474
void VisitValueDecl(ValueDecl *VD)
A ObjCProtocolDecl record.
Definition: ASTBitCodes.h:1240
void setDeclaredWithTypename(bool withTypename)
Set whether this template type parameter was declared with the &#39;typename&#39; or &#39;class&#39; keyword...
bool hasPendingBody() const
Determine whether this declaration has a pending body.
Defines various enumerations that describe declaration and type specifiers.
DeclarationNameLoc - Additional source/type location info for a declaration name. ...
void setSetterCXXAssignment(Expr *setterCXXAssignment)
Definition: DeclObjC.h:2880
void VisitEnumDecl(EnumDecl *ED)
static TypedefDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4439
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2858
void setPropertyDecl(ObjCPropertyDecl *Prop)
Definition: DeclObjC.h:2840
A CXXConversionDecl record.
Definition: ASTBitCodes.h:1370
TagTypeKind
The kind of a tag type.
Definition: Type.h:4762
ObjCTypeParamList * ReadObjCTypeParamList()
Dataflow Directional Tag Classes.
void VisitCXXConversionDecl(CXXConversionDecl *D)
void setDescribedAliasTemplate(TypeAliasTemplateDecl *TAT)
Definition: Decl.h:2998
void setBody(CompoundStmt *B)
Definition: Decl.h:3921
void setImplicitlyInline()
Flag that this function is implicitly inline.
Definition: Decl.h:2305
static CXXConversionDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2423
llvm::BitstreamCursor DeclsCursor
DeclsCursor - This is a cursor to the start of the DECLS_BLOCK block.
Definition: Module.h:403
static ClassScopeFunctionSpecializationDecl * CreateDeserialized(ASTContext &Context, unsigned ID)
static bool isSameTemplateParameterList(const TemplateParameterList *X, const TemplateParameterList *Y)
Determine whether two template parameter lists are similar enough that they may be used in declaratio...
void setHasVolatileMember(bool val)
Definition: Decl.h:3662
void setGetterName(Selector Sel, SourceLocation Loc=SourceLocation())
Definition: DeclObjC.h:926
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1262
static ClassTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty class template node.
The base class of all kinds of template declarations (e.g., class, function, etc.).
Definition: DeclTemplate.h:399
void VisitFunctionDecl(FunctionDecl *FD)
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:354
Represents a field injected from an anonymous union/struct into the parent scope. ...
Definition: Decl.h:2767
A ClassTemplatePartialSpecializationDecl record.
Definition: ASTBitCodes.h:1388
void setUsingLoc(SourceLocation L)
Set the source location of the &#39;using&#39; keyword.
Definition: DeclCXX.h:3584
DeclCode
Record codes for each kind of declaration.
Definition: ASTBitCodes.h:1214
unsigned IsScoped
True if this tag declaration is a scoped enumeration.
Definition: Decl.h:3041
A decomposition declaration.
Definition: DeclCXX.h:3821
RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D)
void setIvarList(ObjCIvarDecl *ivar)
Definition: DeclObjC.h:1507
IdentifierNamespace
IdentifierNamespace - The different namespaces in which declarations may appear.
Definition: DeclBase.h:115
static VarTemplatePartialSpecializationDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Represents a dependent using declaration which was marked with typename.
Definition: DeclCXX.h:3645
A ClassScopeFunctionSpecializationDecl record a class scope function specialization.
Definition: ASTBitCodes.h:1436
DeclarationName - The name of a declaration.
Represents the declaration of an Objective-C type parameter.
Definition: DeclObjC.h:576
Kind getKind() const
Definition: DeclBase.h:420
void VisitObjCMethodDecl(ObjCMethodDecl *D)
void setDependentTemplateSpecialization(ASTContext &Context, const UnresolvedSetImpl &Templates, const TemplateArgumentListInfo &TemplateArgs)
Specifies that this function declaration is actually a dependent function template specialization...
Definition: Decl.cpp:3441
A LinkageSpecDecl record.
Definition: ASTBitCodes.h:1346
RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD)
static NonTypeTemplateParmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
ParmVarDeclBitfields ParmVarDeclBits
Definition: Decl.h:973
static ObjCCategoryDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:1967
void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D)
void VisitObjCImplementationDecl(ObjCImplementationDecl *D)
Represents an enum.
Definition: Decl.h:3299
void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D)
static bool allowODRLikeMergeInC(NamedDecl *ND)
ODR-like semantics for C/ObjC allow us to merge tag types and a structural check in Sema guarantees t...
TemplateSpecializationKind
Describes the kind of template specialization that a particular template specialization declaration r...
Definition: Specifiers.h:144
static void forAllLaterRedecls(DeclT *D, Fn F)
void setExternLoc(SourceLocation L)
Definition: DeclCXX.h:2854
static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From, Decl *ToD)
Inherit the default template argument from From to To.
Tags, declared with &#39;struct foo;&#39; and referenced with &#39;struct foo&#39;.
Definition: DeclBase.h:125
A type that was preceded by the &#39;template&#39; keyword, stored as a Type*.
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any...
Definition: ASTContext.h:1050
static FriendTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
static LabelDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4253
uint32_t DeclID
An ID number that refers to a declaration in an AST file.
Definition: ASTBitCodes.h:69
All of the names in this module are visible.
Definition: Module.h:271
void setLocalExternDecl()
Changes the namespace of this declaration to reflect that it&#39;s a function-local extern declaration...
Definition: DeclBase.h:1040
Capturing variable-length array type.
Definition: Lambda.h:39
SmallVector< uint64_t, 64 > RecordData
Definition: ASTReader.h:375
A PragmaCommentDecl record.
Definition: ASTBitCodes.h:1454
IdentifierResolver & getIdResolver()
Get the identifier resolver used for name lookup / updates in the translation unit scope...
static ObjCAtDefsFieldDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:1786
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2571
void VisitObjCPropertyDecl(ObjCPropertyDecl *D)
bool isIncompleteArrayType() const
Definition: Type.h:6085
Provides common interface for the Decls that cannot be redeclared, but can be merged if the same decl...
Definition: Redeclarable.h:317
static ExportDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4579
NonParmVarDeclBitfields NonParmVarDeclBits
Definition: Decl.h:974
void setInstantiatedFromMemberTemplate(RedeclarableTemplateDecl *TD)
Definition: DeclTemplate.h:930
QualType getCanonicalTypeInternal() const
Definition: Type.h:2178
void setHasNonZeroConstructors(bool val)
Definition: DeclObjC.h:2674
static ClassTemplatePartialSpecializationDecl * CreateDeserialized(ASTContext &C, unsigned ID)
LanguageIDs
Represents the language in a linkage specification.
Definition: DeclCXX.h:2804