clang  8.0.0svn
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 DeferredTypeID = 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 DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
181 
182  static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
183  DeclContext *DC,
184  unsigned Index);
185  static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
186  unsigned Index, NamedDecl *D);
187 
188  /// Results from loading a RedeclarableDecl.
189  class RedeclarableResult {
190  Decl *MergeWith;
191  GlobalDeclID FirstID;
192  bool IsKeyDecl;
193 
194  public:
195  RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
196  : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
197 
198  /// Retrieve the first ID.
199  GlobalDeclID getFirstID() const { return FirstID; }
200 
201  /// Is this declaration a key declaration?
202  bool isKeyDecl() const { return IsKeyDecl; }
203 
204  /// Get a known declaration that this should be merged with, if
205  /// any.
206  Decl *getKnownMergeTarget() const { return MergeWith; }
207  };
208 
209  /// Class used to capture the result of searching for an existing
210  /// declaration of a specific kind and name, along with the ability
211  /// to update the place where this result was found (the declaration
212  /// chain hanging off an identifier or the DeclContext we searched in)
213  /// if requested.
214  class FindExistingResult {
215  ASTReader &Reader;
216  NamedDecl *New = nullptr;
217  NamedDecl *Existing = nullptr;
218  bool AddResult = false;
219  unsigned AnonymousDeclNumber = 0;
220  IdentifierInfo *TypedefNameForLinkage = nullptr;
221 
222  public:
223  FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
224 
225  FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
226  unsigned AnonymousDeclNumber,
227  IdentifierInfo *TypedefNameForLinkage)
228  : Reader(Reader), New(New), Existing(Existing), AddResult(true),
229  AnonymousDeclNumber(AnonymousDeclNumber),
230  TypedefNameForLinkage(TypedefNameForLinkage) {}
231 
232  FindExistingResult(FindExistingResult &&Other)
233  : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
234  AddResult(Other.AddResult),
235  AnonymousDeclNumber(Other.AnonymousDeclNumber),
236  TypedefNameForLinkage(Other.TypedefNameForLinkage) {
237  Other.AddResult = false;
238  }
239 
240  FindExistingResult &operator=(FindExistingResult &&) = delete;
241  ~FindExistingResult();
242 
243  /// Suppress the addition of this result into the known set of
244  /// names.
245  void suppress() { AddResult = false; }
246 
247  operator NamedDecl*() const { return Existing; }
248 
249  template<typename T>
250  operator T*() const { return dyn_cast_or_null<T>(Existing); }
251  };
252 
253  static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
254  DeclContext *DC);
255  FindExistingResult findExisting(NamedDecl *D);
256 
257  public:
259  ASTReader::RecordLocation Loc,
260  DeclID thisDeclID, SourceLocation ThisDeclLoc)
261  : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
262  ThisDeclLoc(ThisDeclLoc) {}
263 
264  template <typename T> static
267  if (IDs.empty())
268  return;
269 
270  // FIXME: We should avoid this pattern of getting the ASTContext.
271  ASTContext &C = D->getASTContext();
272 
273  auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
274 
275  if (auto &Old = LazySpecializations) {
276  IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
277  llvm::sort(IDs.begin(), IDs.end());
278  IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
279  }
280 
281  auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
282  *Result = IDs.size();
283  std::copy(IDs.begin(), IDs.end(), Result + 1);
284 
285  LazySpecializations = Result;
286  }
287 
288  template <typename DeclT>
289  static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
290  static Decl *getMostRecentDeclImpl(...);
291  static Decl *getMostRecentDecl(Decl *D);
292 
293  template <typename DeclT>
294  static void attachPreviousDeclImpl(ASTReader &Reader,
296  Decl *Canon);
297  static void attachPreviousDeclImpl(ASTReader &Reader, ...);
298  static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
299  Decl *Canon);
300 
301  template <typename DeclT>
302  static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
303  static void attachLatestDeclImpl(...);
304  static void attachLatestDecl(Decl *D, Decl *latest);
305 
306  template <typename DeclT>
307  static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
308  static void markIncompleteDeclChainImpl(...);
309 
310  /// Determine whether this declaration has a pending body.
311  bool hasPendingBody() const { return HasPendingBody; }
312 
313  void ReadFunctionDefinition(FunctionDecl *FD);
314  void Visit(Decl *D);
315 
316  void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
317 
319  ObjCCategoryDecl *Next) {
320  Cat->NextClassCategory = Next;
321  }
322 
323  void VisitDecl(Decl *D);
324  void VisitPragmaCommentDecl(PragmaCommentDecl *D);
325  void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
326  void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
327  void VisitNamedDecl(NamedDecl *ND);
328  void VisitLabelDecl(LabelDecl *LD);
329  void VisitNamespaceDecl(NamespaceDecl *D);
330  void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
331  void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
332  void VisitTypeDecl(TypeDecl *TD);
333  RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
334  void VisitTypedefDecl(TypedefDecl *TD);
335  void VisitTypeAliasDecl(TypeAliasDecl *TD);
336  void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
337  RedeclarableResult VisitTagDecl(TagDecl *TD);
338  void VisitEnumDecl(EnumDecl *ED);
339  RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
340  void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
341  RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
342  void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
343  RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
345 
348  VisitClassTemplateSpecializationDeclImpl(D);
349  }
350 
351  void VisitClassTemplatePartialSpecializationDecl(
353  void VisitClassScopeFunctionSpecializationDecl(
355  RedeclarableResult
356  VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
357 
359  VisitVarTemplateSpecializationDeclImpl(D);
360  }
361 
362  void VisitVarTemplatePartialSpecializationDecl(
364  void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
365  void VisitValueDecl(ValueDecl *VD);
366  void VisitEnumConstantDecl(EnumConstantDecl *ECD);
367  void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
368  void VisitDeclaratorDecl(DeclaratorDecl *DD);
369  void VisitFunctionDecl(FunctionDecl *FD);
370  void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
371  void VisitCXXMethodDecl(CXXMethodDecl *D);
372  void VisitCXXConstructorDecl(CXXConstructorDecl *D);
373  void VisitCXXDestructorDecl(CXXDestructorDecl *D);
374  void VisitCXXConversionDecl(CXXConversionDecl *D);
375  void VisitFieldDecl(FieldDecl *FD);
376  void VisitMSPropertyDecl(MSPropertyDecl *FD);
377  void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
378  RedeclarableResult VisitVarDeclImpl(VarDecl *D);
379  void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
380  void VisitImplicitParamDecl(ImplicitParamDecl *PD);
381  void VisitParmVarDecl(ParmVarDecl *PD);
382  void VisitDecompositionDecl(DecompositionDecl *DD);
383  void VisitBindingDecl(BindingDecl *BD);
384  void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
385  DeclID VisitTemplateDecl(TemplateDecl *D);
386  RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
387  void VisitClassTemplateDecl(ClassTemplateDecl *D);
388  void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
389  void VisitVarTemplateDecl(VarTemplateDecl *D);
390  void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
391  void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
392  void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
393  void VisitUsingDecl(UsingDecl *D);
394  void VisitUsingPackDecl(UsingPackDecl *D);
395  void VisitUsingShadowDecl(UsingShadowDecl *D);
396  void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
397  void VisitLinkageSpecDecl(LinkageSpecDecl *D);
398  void VisitExportDecl(ExportDecl *D);
399  void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
400  void VisitImportDecl(ImportDecl *D);
401  void VisitAccessSpecDecl(AccessSpecDecl *D);
402  void VisitFriendDecl(FriendDecl *D);
403  void VisitFriendTemplateDecl(FriendTemplateDecl *D);
404  void VisitStaticAssertDecl(StaticAssertDecl *D);
405  void VisitBlockDecl(BlockDecl *BD);
406  void VisitCapturedDecl(CapturedDecl *CD);
407  void VisitEmptyDecl(EmptyDecl *D);
408 
409  std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
410 
411  template<typename T>
412  RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
413 
414  template<typename T>
415  void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
416  DeclID TemplatePatternID = 0);
417 
418  template<typename T>
419  void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
420  RedeclarableResult &Redecl,
421  DeclID TemplatePatternID = 0);
422 
423  template<typename T>
424  void mergeMergeable(Mergeable<T> *D);
425 
426  void mergeTemplatePattern(RedeclarableTemplateDecl *D,
427  RedeclarableTemplateDecl *Existing,
428  DeclID DsID, bool IsKeyDecl);
429 
430  ObjCTypeParamList *ReadObjCTypeParamList();
431 
432  // FIXME: Reorder according to DeclNodes.td?
433  void VisitObjCMethodDecl(ObjCMethodDecl *D);
434  void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
435  void VisitObjCContainerDecl(ObjCContainerDecl *D);
436  void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
437  void VisitObjCIvarDecl(ObjCIvarDecl *D);
438  void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
439  void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
440  void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
441  void VisitObjCImplDecl(ObjCImplDecl *D);
442  void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
443  void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
444  void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
445  void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
446  void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
447  void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
448  void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
449  void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
450  };
451 
452 } // namespace clang
453 
454 namespace {
455 
456 /// Iterator over the redeclarations of a declaration that have already
457 /// been merged into the same redeclaration chain.
458 template<typename DeclT>
459 class MergedRedeclIterator {
460  DeclT *Start;
461  DeclT *Canonical = nullptr;
462  DeclT *Current = nullptr;
463 
464 public:
465  MergedRedeclIterator() = default;
466  MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
467 
468  DeclT *operator*() { return Current; }
469 
470  MergedRedeclIterator &operator++() {
471  if (Current->isFirstDecl()) {
472  Canonical = Current;
473  Current = Current->getMostRecentDecl();
474  } else
475  Current = Current->getPreviousDecl();
476 
477  // If we started in the merged portion, we'll reach our start position
478  // eventually. Otherwise, we'll never reach it, but the second declaration
479  // we reached was the canonical declaration, so stop when we see that one
480  // again.
481  if (Current == Start || Current == Canonical)
482  Current = nullptr;
483  return *this;
484  }
485 
486  friend bool operator!=(const MergedRedeclIterator &A,
487  const MergedRedeclIterator &B) {
488  return A.Current != B.Current;
489  }
490 };
491 
492 } // namespace
493 
494 template <typename DeclT>
495 static llvm::iterator_range<MergedRedeclIterator<DeclT>>
496 merged_redecls(DeclT *D) {
497  return llvm::make_range(MergedRedeclIterator<DeclT>(D),
498  MergedRedeclIterator<DeclT>());
499 }
500 
501 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
502  return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
503 }
504 
506  if (Record.readInt())
507  Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
508  if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
509  CD->setNumCtorInitializers(Record.readInt());
510  if (CD->getNumCtorInitializers())
511  CD->CtorInitializers = ReadGlobalOffset();
512  }
513  // Store the offset of the body so we can lazily load it later.
514  Reader.PendingBodies[FD] = GetCurrentCursorOffset();
515  HasPendingBody = true;
516 }
517 
520 
521  // At this point we have deserialized and merged the decl and it is safe to
522  // update its canonical decl to signal that the entire entity is used.
523  D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
524  IsDeclMarkedUsed = false;
525 
526  if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
527  if (auto *TInfo = DD->getTypeSourceInfo())
528  Record.readTypeLoc(TInfo->getTypeLoc());
529  }
530 
531  if (auto *TD = dyn_cast<TypeDecl>(D)) {
532  // We have a fully initialized TypeDecl. Read its type now.
533  TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
534 
535  // If this is a tag declaration with a typedef name for linkage, it's safe
536  // to load that typedef now.
537  if (NamedDeclForTagDecl)
538  cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
539  cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
540  } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
541  // if we have a fully initialized TypeDecl, we can safely read its type now.
542  ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
543  } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
544  // FunctionDecl's body was written last after all other Stmts/Exprs.
545  // We only read it if FD doesn't already have a body (e.g., from another
546  // module).
547  // FIXME: Can we diagnose ODR violations somehow?
548  if (Record.readInt())
549  ReadFunctionDefinition(FD);
550  }
551 }
552 
554  if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
555  isa<ParmVarDecl>(D)) {
556  // We don't want to deserialize the DeclContext of a template
557  // parameter or of a parameter of a function template immediately. These
558  // entities might be used in the formulation of its DeclContext (for
559  // example, a function parameter can be used in decltype() in trailing
560  // return type of the function). Use the translation unit DeclContext as a
561  // placeholder.
562  GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID();
563  GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID();
564  if (!LexicalDCIDForTemplateParmDecl)
565  LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
566  Reader.addPendingDeclContextInfo(D,
567  SemaDCIDForTemplateParmDecl,
568  LexicalDCIDForTemplateParmDecl);
569  D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
570  } else {
571  auto *SemaDC = ReadDeclAs<DeclContext>();
572  auto *LexicalDC = ReadDeclAs<DeclContext>();
573  if (!LexicalDC)
574  LexicalDC = SemaDC;
575  DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
576  // Avoid calling setLexicalDeclContext() directly because it uses
577  // Decl::getASTContext() internally which is unsafe during derialization.
578  D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
579  Reader.getContext());
580  }
581  D->setLocation(ThisDeclLoc);
582  D->setInvalidDecl(Record.readInt());
583  if (Record.readInt()) { // hasAttrs
584  AttrVec Attrs;
585  Record.readAttributes(Attrs);
586  // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
587  // internally which is unsafe during derialization.
588  D->setAttrsImpl(Attrs, Reader.getContext());
589  }
590  D->setImplicit(Record.readInt());
591  D->Used = Record.readInt();
592  IsDeclMarkedUsed |= D->Used;
593  D->setReferenced(Record.readInt());
594  D->setTopLevelDeclInObjCContainer(Record.readInt());
595  D->setAccess((AccessSpecifier)Record.readInt());
596  D->FromASTFile = true;
597  bool ModulePrivate = Record.readInt();
598 
599  // Determine whether this declaration is part of a (sub)module. If so, it
600  // may not yet be visible.
601  if (unsigned SubmoduleID = readSubmoduleID()) {
602  // Store the owning submodule ID in the declaration.
607 
608  if (ModulePrivate) {
609  // Module-private declarations are never visible, so there is no work to
610  // do.
611  } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
612  // If local visibility is being tracked, this declaration will become
613  // hidden and visible as the owning module does.
614  } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
615  // Mark the declaration as visible when its owning module becomes visible.
616  if (Owner->NameVisibility == Module::AllVisible)
618  else
619  Reader.HiddenNamesMap[Owner].push_back(D);
620  }
621  } else if (ModulePrivate) {
623  }
624 }
625 
627  VisitDecl(D);
628  D->setLocation(ReadSourceLocation());
629  D->CommentKind = (PragmaMSCommentKind)Record.readInt();
630  std::string Arg = ReadString();
631  memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
632  D->getTrailingObjects<char>()[Arg.size()] = '\0';
633 }
634 
636  VisitDecl(D);
637  D->setLocation(ReadSourceLocation());
638  std::string Name = ReadString();
639  memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
640  D->getTrailingObjects<char>()[Name.size()] = '\0';
641 
642  D->ValueStart = Name.size() + 1;
643  std::string Value = ReadString();
644  memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
645  Value.size());
646  D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
647 }
648 
650  llvm_unreachable("Translation units are not serialized");
651 }
652 
654  VisitDecl(ND);
655  ND->setDeclName(Record.readDeclarationName());
656  AnonymousDeclNumber = Record.readInt();
657 }
658 
660  VisitNamedDecl(TD);
661  TD->setLocStart(ReadSourceLocation());
662  // Delay type reading until after we have fully initialized the decl.
663  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
664 }
665 
666 ASTDeclReader::RedeclarableResult
668  RedeclarableResult Redecl = VisitRedeclarable(TD);
669  VisitTypeDecl(TD);
670  TypeSourceInfo *TInfo = GetTypeSourceInfo();
671  if (Record.readInt()) { // isModed
672  QualType modedT = Record.readType();
673  TD->setModedTypeSourceInfo(TInfo, modedT);
674  } else
675  TD->setTypeSourceInfo(TInfo);
676  // Read and discard the declaration for which this is a typedef name for
677  // linkage, if it exists. We cannot rely on our type to pull in this decl,
678  // because it might have been merged with a type from another module and
679  // thus might not refer to our version of the declaration.
680  ReadDecl();
681  return Redecl;
682 }
683 
685  RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
686  mergeRedeclarable(TD, Redecl);
687 }
688 
690  RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
691  if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>())
692  // Merged when we merge the template.
693  TD->setDescribedAliasTemplate(Template);
694  else
695  mergeRedeclarable(TD, Redecl);
696 }
697 
698 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
699  RedeclarableResult Redecl = VisitRedeclarable(TD);
700  VisitTypeDecl(TD);
701 
702  TD->IdentifierNamespace = Record.readInt();
703  TD->setTagKind((TagDecl::TagKind)Record.readInt());
704  if (!isa<CXXRecordDecl>(TD))
705  TD->setCompleteDefinition(Record.readInt());
706  TD->setEmbeddedInDeclarator(Record.readInt());
707  TD->setFreeStanding(Record.readInt());
708  TD->setCompleteDefinitionRequired(Record.readInt());
709  TD->setBraceRange(ReadSourceRange());
710 
711  switch (Record.readInt()) {
712  case 0:
713  break;
714  case 1: { // ExtInfo
715  auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
716  ReadQualifierInfo(*Info);
717  TD->TypedefNameDeclOrQualifier = Info;
718  break;
719  }
720  case 2: // TypedefNameForAnonDecl
721  NamedDeclForTagDecl = ReadDeclID();
722  TypedefNameForLinkage = Record.getIdentifierInfo();
723  break;
724  default:
725  llvm_unreachable("unexpected tag info kind");
726  }
727 
728  if (!isa<CXXRecordDecl>(TD))
729  mergeRedeclarable(TD, Redecl);
730  return Redecl;
731 }
732 
734  VisitTagDecl(ED);
735  if (TypeSourceInfo *TI = GetTypeSourceInfo())
736  ED->setIntegerTypeSourceInfo(TI);
737  else
738  ED->setIntegerType(Record.readType());
739  ED->setPromotionType(Record.readType());
740  ED->setNumPositiveBits(Record.readInt());
741  ED->setNumNegativeBits(Record.readInt());
742  ED->setScoped(Record.readInt());
743  ED->setScopedUsingClassTag(Record.readInt());
744  ED->setFixed(Record.readInt());
745 
746  ED->setHasODRHash(true);
747  ED->ODRHash = 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->setCompleteDefinition(false);
768  Reader.mergeDefinitionVisibility(OldDef, ED);
769  if (OldDef->getODRHash() != ED->getODRHash())
770  Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
771  } else {
772  OldDef = ED;
773  }
774  }
775 
776  if (auto *InstED = ReadDeclAs<EnumDecl>()) {
777  auto TSK = (TemplateSpecializationKind)Record.readInt();
778  SourceLocation POI = ReadSourceLocation();
779  ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
781  }
782 }
783 
784 ASTDeclReader::RedeclarableResult
786  RedeclarableResult Redecl = VisitTagDecl(RD);
787  RD->setHasFlexibleArrayMember(Record.readInt());
788  RD->setAnonymousStructOrUnion(Record.readInt());
789  RD->setHasObjectMember(Record.readInt());
790  RD->setHasVolatileMember(Record.readInt());
791  RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
792  RD->setNonTrivialToPrimitiveCopy(Record.readInt());
793  RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
794  RD->setParamDestroyedInCallee(Record.readInt());
796  return Redecl;
797 }
798 
800  VisitNamedDecl(VD);
801  // For function declarations, defer reading the type in case the function has
802  // a deduced return type that references an entity declared within the
803  // function.
804  if (isa<FunctionDecl>(VD))
805  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
806  else
807  VD->setType(Record.readType());
808 }
809 
811  VisitValueDecl(ECD);
812  if (Record.readInt())
813  ECD->setInitExpr(Record.readExpr());
814  ECD->setInitVal(Record.readAPSInt());
815  mergeMergeable(ECD);
816 }
817 
819  VisitValueDecl(DD);
820  DD->setInnerLocStart(ReadSourceLocation());
821  if (Record.readInt()) { // hasExtInfo
822  auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
823  ReadQualifierInfo(*Info);
824  DD->DeclInfo = Info;
825  }
826  QualType TSIType = Record.readType();
827  DD->setTypeSourceInfo(
828  TSIType.isNull() ? nullptr
829  : Reader.getContext().CreateTypeSourceInfo(TSIType));
830 }
831 
833  RedeclarableResult Redecl = VisitRedeclarable(FD);
834  VisitDeclaratorDecl(FD);
835 
836  // Attach a type to this function. Use the real type if possible, but fall
837  // back to the type as written if it involves a deduced return type.
838  if (FD->getTypeSourceInfo() &&
840  ->getReturnType()->getContainedAutoType()) {
841  // We'll set up the real type in Visit, once we've finished loading the
842  // function.
843  FD->setType(FD->getTypeSourceInfo()->getType());
844  Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
845  } else {
846  FD->setType(Reader.GetType(DeferredTypeID));
847  }
848  DeferredTypeID = 0;
849 
850  ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName());
851  FD->IdentifierNamespace = Record.readInt();
852 
853  // FunctionDecl's body is handled last at ASTDeclReader::Visit,
854  // after everything else is read.
855 
856  FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
857  FD->setInlineSpecified(Record.readInt());
858  FD->setImplicitlyInline(Record.readInt());
859  FD->setExplicitSpecified(Record.readInt());
860  FD->setVirtualAsWritten(Record.readInt());
861  FD->setPure(Record.readInt());
862  FD->setHasInheritedPrototype(Record.readInt());
863  FD->setHasWrittenPrototype(Record.readInt());
864  FD->setDeletedAsWritten(Record.readInt());
865  FD->setTrivial(Record.readInt());
866  FD->setTrivialForCall(Record.readInt());
867  FD->setDefaulted(Record.readInt());
868  FD->setExplicitlyDefaulted(Record.readInt());
869  FD->setHasImplicitReturnZero(Record.readInt());
870  FD->setConstexpr(Record.readInt());
871  FD->setUsesSEHTry(Record.readInt());
872  FD->setHasSkippedBody(Record.readInt());
873  FD->setIsMultiVersion(Record.readInt());
874  FD->setLateTemplateParsed(Record.readInt());
875 
876  FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
877  FD->EndRangeLoc = ReadSourceLocation();
878 
879  FD->ODRHash = Record.readInt();
880  FD->setHasODRHash(true);
881 
882  switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
884  mergeRedeclarable(FD, Redecl);
885  break;
887  // Merged when we merge the template.
888  FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
889  break;
891  auto *InstFD = ReadDeclAs<FunctionDecl>();
892  auto TSK = (TemplateSpecializationKind)Record.readInt();
893  SourceLocation POI = ReadSourceLocation();
894  FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
896  mergeRedeclarable(FD, Redecl);
897  break;
898  }
900  auto *Template = ReadDeclAs<FunctionTemplateDecl>();
901  auto TSK = (TemplateSpecializationKind)Record.readInt();
902 
903  // Template arguments.
905  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
906 
907  // Template args as written.
909  SourceLocation LAngleLoc, RAngleLoc;
910  bool HasTemplateArgumentsAsWritten = Record.readInt();
911  if (HasTemplateArgumentsAsWritten) {
912  unsigned NumTemplateArgLocs = Record.readInt();
913  TemplArgLocs.reserve(NumTemplateArgLocs);
914  for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
915  TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
916 
917  LAngleLoc = ReadSourceLocation();
918  RAngleLoc = ReadSourceLocation();
919  }
920 
921  SourceLocation POI = ReadSourceLocation();
922 
923  ASTContext &C = Reader.getContext();
924  TemplateArgumentList *TemplArgList
925  = TemplateArgumentList::CreateCopy(C, TemplArgs);
926  TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
927  for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
928  TemplArgsInfo.addArgument(TemplArgLocs[i]);
930  = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
931  TemplArgList,
932  HasTemplateArgumentsAsWritten ? &TemplArgsInfo
933  : nullptr,
934  POI);
935  FD->TemplateOrSpecialization = FTInfo;
936 
937  if (FD->isCanonicalDecl()) { // if canonical add to template's set.
938  // The template that contains the specializations set. It's not safe to
939  // use getCanonicalDecl on Template since it may still be initializing.
940  auto *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
941  // Get the InsertPos by FindNodeOrInsertPos() instead of calling
942  // InsertNode(FTInfo) directly to avoid the getASTContext() call in
943  // FunctionTemplateSpecializationInfo's Profile().
944  // We avoid getASTContext because a decl in the parent hierarchy may
945  // be initializing.
946  llvm::FoldingSetNodeID ID;
948  void *InsertPos = nullptr;
949  FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
950  FunctionTemplateSpecializationInfo *ExistingInfo =
951  CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
952  if (InsertPos)
953  CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
954  else {
955  assert(Reader.getContext().getLangOpts().Modules &&
956  "already deserialized this template specialization");
957  mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
958  }
959  }
960  break;
961  }
963  // Templates.
964  UnresolvedSet<8> TemplDecls;
965  unsigned NumTemplates = Record.readInt();
966  while (NumTemplates--)
967  TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
968 
969  // Templates args.
970  TemplateArgumentListInfo TemplArgs;
971  unsigned NumArgs = Record.readInt();
972  while (NumArgs--)
973  TemplArgs.addArgument(Record.readTemplateArgumentLoc());
974  TemplArgs.setLAngleLoc(ReadSourceLocation());
975  TemplArgs.setRAngleLoc(ReadSourceLocation());
976 
977  FD->setDependentTemplateSpecialization(Reader.getContext(),
978  TemplDecls, TemplArgs);
979  // These are not merged; we don't need to merge redeclarations of dependent
980  // template friends.
981  break;
982  }
983  }
984 
985  // Read in the parameters.
986  unsigned NumParams = Record.readInt();
988  Params.reserve(NumParams);
989  for (unsigned I = 0; I != NumParams; ++I)
990  Params.push_back(ReadDeclAs<ParmVarDecl>());
991  FD->setParams(Reader.getContext(), Params);
992 }
993 
995  VisitNamedDecl(MD);
996  if (Record.readInt()) {
997  // Load the body on-demand. Most clients won't care, because method
998  // definitions rarely show up in headers.
999  Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1000  HasPendingBody = true;
1001  MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
1002  MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
1003  }
1004  MD->setInstanceMethod(Record.readInt());
1005  MD->setVariadic(Record.readInt());
1006  MD->setPropertyAccessor(Record.readInt());
1007  MD->setDefined(Record.readInt());
1008  MD->setOverriding(Record.readInt());
1009  MD->setHasSkippedBody(Record.readInt());
1010 
1011  MD->setIsRedeclaration(Record.readInt());
1012  MD->setHasRedeclaration(Record.readInt());
1013  if (MD->hasRedeclaration())
1014  Reader.getContext().setObjCMethodRedeclaration(MD,
1015  ReadDeclAs<ObjCMethodDecl>());
1016 
1018  MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1019  MD->setRelatedResultType(Record.readInt());
1020  MD->setReturnType(Record.readType());
1021  MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
1022  MD->DeclEndLoc = ReadSourceLocation();
1023  unsigned NumParams = Record.readInt();
1025  Params.reserve(NumParams);
1026  for (unsigned I = 0; I != NumParams; ++I)
1027  Params.push_back(ReadDeclAs<ParmVarDecl>());
1028 
1029  MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1030  unsigned NumStoredSelLocs = Record.readInt();
1032  SelLocs.reserve(NumStoredSelLocs);
1033  for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1034  SelLocs.push_back(ReadSourceLocation());
1035 
1036  MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1037 }
1038 
1040  VisitTypedefNameDecl(D);
1041 
1042  D->Variance = Record.readInt();
1043  D->Index = Record.readInt();
1044  D->VarianceLoc = ReadSourceLocation();
1045  D->ColonLoc = ReadSourceLocation();
1046 }
1047 
1049  VisitNamedDecl(CD);
1050  CD->setAtStartLoc(ReadSourceLocation());
1051  CD->setAtEndRange(ReadSourceRange());
1052 }
1053 
1055  unsigned numParams = Record.readInt();
1056  if (numParams == 0)
1057  return nullptr;
1058 
1060  typeParams.reserve(numParams);
1061  for (unsigned i = 0; i != numParams; ++i) {
1062  auto *typeParam = ReadDeclAs<ObjCTypeParamDecl>();
1063  if (!typeParam)
1064  return nullptr;
1065 
1066  typeParams.push_back(typeParam);
1067  }
1068 
1069  SourceLocation lAngleLoc = ReadSourceLocation();
1070  SourceLocation rAngleLoc = ReadSourceLocation();
1071 
1072  return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1073  typeParams, rAngleLoc);
1074 }
1075 
1076 void ASTDeclReader::ReadObjCDefinitionData(
1077  struct ObjCInterfaceDecl::DefinitionData &Data) {
1078  // Read the superclass.
1079  Data.SuperClassTInfo = GetTypeSourceInfo();
1080 
1081  Data.EndLoc = ReadSourceLocation();
1082  Data.HasDesignatedInitializers = Record.readInt();
1083 
1084  // Read the directly referenced protocols and their SourceLocations.
1085  unsigned NumProtocols = Record.readInt();
1087  Protocols.reserve(NumProtocols);
1088  for (unsigned I = 0; I != NumProtocols; ++I)
1089  Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1091  ProtoLocs.reserve(NumProtocols);
1092  for (unsigned I = 0; I != NumProtocols; ++I)
1093  ProtoLocs.push_back(ReadSourceLocation());
1094  Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1095  Reader.getContext());
1096 
1097  // Read the transitive closure of protocols referenced by this class.
1098  NumProtocols = Record.readInt();
1099  Protocols.clear();
1100  Protocols.reserve(NumProtocols);
1101  for (unsigned I = 0; I != NumProtocols; ++I)
1102  Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1103  Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1104  Reader.getContext());
1105 }
1106 
1107 void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1108  struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1109  // FIXME: odr checking?
1110 }
1111 
1113  RedeclarableResult Redecl = VisitRedeclarable(ID);
1114  VisitObjCContainerDecl(ID);
1115  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1116  mergeRedeclarable(ID, Redecl);
1117 
1118  ID->TypeParamList = ReadObjCTypeParamList();
1119  if (Record.readInt()) {
1120  // Read the definition.
1121  ID->allocateDefinitionData();
1122 
1123  ReadObjCDefinitionData(ID->data());
1124  ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1125  if (Canon->Data.getPointer()) {
1126  // If we already have a definition, keep the definition invariant and
1127  // merge the data.
1128  MergeDefinitionData(Canon, std::move(ID->data()));
1129  ID->Data = Canon->Data;
1130  } else {
1131  // Set the definition data of the canonical declaration, so other
1132  // redeclarations will see it.
1133  ID->getCanonicalDecl()->Data = ID->Data;
1134 
1135  // We will rebuild this list lazily.
1136  ID->setIvarList(nullptr);
1137  }
1138 
1139  // Note that we have deserialized a definition.
1140  Reader.PendingDefinitions.insert(ID);
1141 
1142  // Note that we've loaded this Objective-C class.
1143  Reader.ObjCClassesLoaded.push_back(ID);
1144  } else {
1145  ID->Data = ID->getCanonicalDecl()->Data;
1146  }
1147 }
1148 
1150  VisitFieldDecl(IVD);
1151  IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1152  // This field will be built lazily.
1153  IVD->setNextIvar(nullptr);
1154  bool synth = Record.readInt();
1155  IVD->setSynthesize(synth);
1156 }
1157 
1158 void ASTDeclReader::ReadObjCDefinitionData(
1159  struct ObjCProtocolDecl::DefinitionData &Data) {
1160  unsigned NumProtoRefs = Record.readInt();
1162  ProtoRefs.reserve(NumProtoRefs);
1163  for (unsigned I = 0; I != NumProtoRefs; ++I)
1164  ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1166  ProtoLocs.reserve(NumProtoRefs);
1167  for (unsigned I = 0; I != NumProtoRefs; ++I)
1168  ProtoLocs.push_back(ReadSourceLocation());
1169  Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1170  ProtoLocs.data(), Reader.getContext());
1171 }
1172 
1173 void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1174  struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1175  // FIXME: odr checking?
1176 }
1177 
1179  RedeclarableResult Redecl = VisitRedeclarable(PD);
1180  VisitObjCContainerDecl(PD);
1181  mergeRedeclarable(PD, Redecl);
1182 
1183  if (Record.readInt()) {
1184  // Read the definition.
1185  PD->allocateDefinitionData();
1186 
1187  ReadObjCDefinitionData(PD->data());
1188 
1189  ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1190  if (Canon->Data.getPointer()) {
1191  // If we already have a definition, keep the definition invariant and
1192  // merge the data.
1193  MergeDefinitionData(Canon, std::move(PD->data()));
1194  PD->Data = Canon->Data;
1195  } else {
1196  // Set the definition data of the canonical declaration, so other
1197  // redeclarations will see it.
1198  PD->getCanonicalDecl()->Data = PD->Data;
1199  }
1200  // Note that we have deserialized a definition.
1201  Reader.PendingDefinitions.insert(PD);
1202  } else {
1203  PD->Data = PD->getCanonicalDecl()->Data;
1204  }
1205 }
1206 
1208  VisitFieldDecl(FD);
1209 }
1210 
1212  VisitObjCContainerDecl(CD);
1213  CD->setCategoryNameLoc(ReadSourceLocation());
1214  CD->setIvarLBraceLoc(ReadSourceLocation());
1215  CD->setIvarRBraceLoc(ReadSourceLocation());
1216 
1217  // Note that this category has been deserialized. We do this before
1218  // deserializing the interface declaration, so that it will consider this
1219  /// category.
1220  Reader.CategoriesDeserialized.insert(CD);
1221 
1222  CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1223  CD->TypeParamList = ReadObjCTypeParamList();
1224  unsigned NumProtoRefs = Record.readInt();
1226  ProtoRefs.reserve(NumProtoRefs);
1227  for (unsigned I = 0; I != NumProtoRefs; ++I)
1228  ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1230  ProtoLocs.reserve(NumProtoRefs);
1231  for (unsigned I = 0; I != NumProtoRefs; ++I)
1232  ProtoLocs.push_back(ReadSourceLocation());
1233  CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1234  Reader.getContext());
1235 
1236  // Protocols in the class extension belong to the class.
1237  if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1238  CD->ClassInterface->mergeClassExtensionProtocolList(
1239  (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1240  Reader.getContext());
1241 }
1242 
1244  VisitNamedDecl(CAD);
1245  CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1246 }
1247 
1249  VisitNamedDecl(D);
1250  D->setAtLoc(ReadSourceLocation());
1251  D->setLParenLoc(ReadSourceLocation());
1252  QualType T = Record.readType();
1253  TypeSourceInfo *TSI = GetTypeSourceInfo();
1254  D->setType(T, TSI);
1256  (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1258  (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1260  (ObjCPropertyDecl::PropertyControl)Record.readInt());
1261  DeclarationName GetterName = Record.readDeclarationName();
1262  SourceLocation GetterLoc = ReadSourceLocation();
1263  D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1264  DeclarationName SetterName = Record.readDeclarationName();
1265  SourceLocation SetterLoc = ReadSourceLocation();
1266  D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1267  D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1268  D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1269  D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1270 }
1271 
1273  VisitObjCContainerDecl(D);
1274  D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1275 }
1276 
1278  VisitObjCImplDecl(D);
1279  D->CategoryNameLoc = ReadSourceLocation();
1280 }
1281 
1283  VisitObjCImplDecl(D);
1284  D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1285  D->SuperLoc = ReadSourceLocation();
1286  D->setIvarLBraceLoc(ReadSourceLocation());
1287  D->setIvarRBraceLoc(ReadSourceLocation());
1288  D->setHasNonZeroConstructors(Record.readInt());
1289  D->setHasDestructors(Record.readInt());
1290  D->NumIvarInitializers = Record.readInt();
1291  if (D->NumIvarInitializers)
1292  D->IvarInitializers = ReadGlobalOffset();
1293 }
1294 
1296  VisitDecl(D);
1297  D->setAtLoc(ReadSourceLocation());
1298  D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1299  D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1300  D->IvarLoc = ReadSourceLocation();
1301  D->setGetterCXXConstructor(Record.readExpr());
1302  D->setSetterCXXAssignment(Record.readExpr());
1303 }
1304 
1306  VisitDeclaratorDecl(FD);
1307  FD->Mutable = Record.readInt();
1308 
1309  if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1310  FD->InitStorage.setInt(ISK);
1311  FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1312  ? Record.readType().getAsOpaquePtr()
1313  : Record.readExpr());
1314  }
1315 
1316  if (auto *BW = Record.readExpr())
1317  FD->setBitWidth(BW);
1318 
1319  if (!FD->getDeclName()) {
1320  if (auto *Tmpl = ReadDeclAs<FieldDecl>())
1321  Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1322  }
1323  mergeMergeable(FD);
1324 }
1325 
1327  VisitDeclaratorDecl(PD);
1328  PD->GetterId = Record.getIdentifierInfo();
1329  PD->SetterId = Record.getIdentifierInfo();
1330 }
1331 
1333  VisitValueDecl(FD);
1334 
1335  FD->ChainingSize = Record.readInt();
1336  assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1337  FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1338 
1339  for (unsigned I = 0; I != FD->ChainingSize; ++I)
1340  FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1341 
1342  mergeMergeable(FD);
1343 }
1344 
1345 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1346  RedeclarableResult Redecl = VisitRedeclarable(VD);
1347  VisitDeclaratorDecl(VD);
1348 
1349  VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1350  VD->VarDeclBits.TSCSpec = Record.readInt();
1351  VD->VarDeclBits.InitStyle = Record.readInt();
1352  if (!isa<ParmVarDecl>(VD)) {
1353  VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1354  Record.readInt();
1355  VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1356  VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1357  VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1358  VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1359  VD->NonParmVarDeclBits.ARCPseudoStrong = Record.readInt();
1360  VD->NonParmVarDeclBits.IsInline = Record.readInt();
1361  VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1362  VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1363  VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1364  VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1365  VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1366  }
1367  auto VarLinkage = Linkage(Record.readInt());
1368  VD->setCachedLinkage(VarLinkage);
1369 
1370  // Reconstruct the one piece of the IdentifierNamespace that we need.
1371  if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1373  VD->setLocalExternDecl();
1374 
1375  if (uint64_t Val = Record.readInt()) {
1376  VD->setInit(Record.readExpr());
1377  if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1378  EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1379  Eval->CheckedICE = true;
1380  Eval->IsICE = Val == 3;
1381  }
1382  }
1383 
1384  if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1385  Expr *CopyExpr = Record.readExpr();
1386  if (CopyExpr)
1387  Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1388  }
1389 
1390  if (VD->getStorageDuration() == SD_Static && Record.readInt())
1391  Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1392 
1393  enum VarKind {
1394  VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1395  };
1396  switch ((VarKind)Record.readInt()) {
1397  case VarNotTemplate:
1398  // Only true variables (not parameters or implicit parameters) can be
1399  // merged; the other kinds are not really redeclarable at all.
1400  if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1401  !isa<VarTemplateSpecializationDecl>(VD))
1402  mergeRedeclarable(VD, Redecl);
1403  break;
1404  case VarTemplate:
1405  // Merged when we merge the template.
1406  VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1407  break;
1408  case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1409  auto *Tmpl = ReadDeclAs<VarDecl>();
1410  auto TSK = (TemplateSpecializationKind)Record.readInt();
1411  SourceLocation POI = ReadSourceLocation();
1412  Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1413  mergeRedeclarable(VD, Redecl);
1414  break;
1415  }
1416  }
1417 
1418  return Redecl;
1419 }
1420 
1422  VisitVarDecl(PD);
1423 }
1424 
1426  VisitVarDecl(PD);
1427  unsigned isObjCMethodParam = Record.readInt();
1428  unsigned scopeDepth = Record.readInt();
1429  unsigned scopeIndex = Record.readInt();
1430  unsigned declQualifier = Record.readInt();
1431  if (isObjCMethodParam) {
1432  assert(scopeDepth == 0);
1433  PD->setObjCMethodScopeInfo(scopeIndex);
1434  PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1435  } else {
1436  PD->setScopeInfo(scopeDepth, scopeIndex);
1437  }
1438  PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1439  PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1440  if (Record.readInt()) // hasUninstantiatedDefaultArg.
1441  PD->setUninstantiatedDefaultArg(Record.readExpr());
1442 
1443  // FIXME: If this is a redeclaration of a function from another module, handle
1444  // inheritance of default arguments.
1445 }
1446 
1448  VisitVarDecl(DD);
1449  auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1450  for (unsigned I = 0; I != DD->NumBindings; ++I)
1451  BDs[I] = ReadDeclAs<BindingDecl>();
1452 }
1453 
1455  VisitValueDecl(BD);
1456  BD->Binding = Record.readExpr();
1457 }
1458 
1460  VisitDecl(AD);
1461  AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1462  AD->setRParenLoc(ReadSourceLocation());
1463 }
1464 
1466  VisitDecl(BD);
1467  BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1468  BD->setSignatureAsWritten(GetTypeSourceInfo());
1469  unsigned NumParams = Record.readInt();
1471  Params.reserve(NumParams);
1472  for (unsigned I = 0; I != NumParams; ++I)
1473  Params.push_back(ReadDeclAs<ParmVarDecl>());
1474  BD->setParams(Params);
1475 
1476  BD->setIsVariadic(Record.readInt());
1477  BD->setBlockMissingReturnType(Record.readInt());
1478  BD->setIsConversionFromLambda(Record.readInt());
1479  BD->setDoesNotEscape(Record.readInt());
1480 
1481  bool capturesCXXThis = Record.readInt();
1482  unsigned numCaptures = Record.readInt();
1484  captures.reserve(numCaptures);
1485  for (unsigned i = 0; i != numCaptures; ++i) {
1486  auto *decl = ReadDeclAs<VarDecl>();
1487  unsigned flags = Record.readInt();
1488  bool byRef = (flags & 1);
1489  bool nested = (flags & 2);
1490  Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1491 
1492  captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1493  }
1494  BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1495 }
1496 
1498  VisitDecl(CD);
1499  unsigned ContextParamPos = Record.readInt();
1500  CD->setNothrow(Record.readInt() != 0);
1501  // Body is set by VisitCapturedStmt.
1502  for (unsigned I = 0; I < CD->NumParams; ++I) {
1503  if (I != ContextParamPos)
1504  CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1505  else
1506  CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1507  }
1508 }
1509 
1511  VisitDecl(D);
1512  D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1513  D->setExternLoc(ReadSourceLocation());
1514  D->setRBraceLoc(ReadSourceLocation());
1515 }
1516 
1518  VisitDecl(D);
1519  D->RBraceLoc = ReadSourceLocation();
1520 }
1521 
1523  VisitNamedDecl(D);
1524  D->setLocStart(ReadSourceLocation());
1525 }
1526 
1528  RedeclarableResult Redecl = VisitRedeclarable(D);
1529  VisitNamedDecl(D);
1530  D->setInline(Record.readInt());
1531  D->LocStart = ReadSourceLocation();
1532  D->RBraceLoc = ReadSourceLocation();
1533 
1534  // Defer loading the anonymous namespace until we've finished merging
1535  // this namespace; loading it might load a later declaration of the
1536  // same namespace, and we have an invariant that older declarations
1537  // get merged before newer ones try to merge.
1538  GlobalDeclID AnonNamespace = 0;
1539  if (Redecl.getFirstID() == ThisDeclID) {
1540  AnonNamespace = ReadDeclID();
1541  } else {
1542  // Link this namespace back to the first declaration, which has already
1543  // been deserialized.
1544  D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1545  }
1546 
1547  mergeRedeclarable(D, Redecl);
1548 
1549  if (AnonNamespace) {
1550  // Each module has its own anonymous namespace, which is disjoint from
1551  // any other module's anonymous namespaces, so don't attach the anonymous
1552  // namespace at all.
1553  auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1554  if (!Record.isModule())
1555  D->setAnonymousNamespace(Anon);
1556  }
1557 }
1558 
1560  RedeclarableResult Redecl = VisitRedeclarable(D);
1561  VisitNamedDecl(D);
1562  D->NamespaceLoc = ReadSourceLocation();
1563  D->IdentLoc = ReadSourceLocation();
1564  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1565  D->Namespace = ReadDeclAs<NamedDecl>();
1566  mergeRedeclarable(D, Redecl);
1567 }
1568 
1570  VisitNamedDecl(D);
1571  D->setUsingLoc(ReadSourceLocation());
1572  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1573  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1574  D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1575  D->setTypename(Record.readInt());
1576  if (auto *Pattern = ReadDeclAs<NamedDecl>())
1577  Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1578  mergeMergeable(D);
1579 }
1580 
1582  VisitNamedDecl(D);
1583  D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1584  auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1585  for (unsigned I = 0; I != D->NumExpansions; ++I)
1586  Expansions[I] = ReadDeclAs<NamedDecl>();
1587  mergeMergeable(D);
1588 }
1589 
1591  RedeclarableResult Redecl = VisitRedeclarable(D);
1592  VisitNamedDecl(D);
1593  D->Underlying = ReadDeclAs<NamedDecl>();
1594  D->IdentifierNamespace = Record.readInt();
1595  D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1596  auto *Pattern = ReadDeclAs<UsingShadowDecl>();
1597  if (Pattern)
1598  Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1599  mergeRedeclarable(D, Redecl);
1600 }
1601 
1604  VisitUsingShadowDecl(D);
1605  D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1606  D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1607  D->IsVirtual = Record.readInt();
1608 }
1609 
1611  VisitNamedDecl(D);
1612  D->UsingLoc = ReadSourceLocation();
1613  D->NamespaceLoc = ReadSourceLocation();
1614  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1615  D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1616  D->CommonAncestor = ReadDeclAs<DeclContext>();
1617 }
1618 
1620  VisitValueDecl(D);
1621  D->setUsingLoc(ReadSourceLocation());
1622  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1623  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1624  D->EllipsisLoc = ReadSourceLocation();
1625  mergeMergeable(D);
1626 }
1627 
1630  VisitTypeDecl(D);
1631  D->TypenameLocation = ReadSourceLocation();
1632  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1633  D->EllipsisLoc = ReadSourceLocation();
1634  mergeMergeable(D);
1635 }
1636 
1637 void ASTDeclReader::ReadCXXDefinitionData(
1638  struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1639  // Note: the caller has deserialized the IsLambda bit already.
1640  Data.UserDeclaredConstructor = Record.readInt();
1641  Data.UserDeclaredSpecialMembers = Record.readInt();
1642  Data.Aggregate = Record.readInt();
1643  Data.PlainOldData = Record.readInt();
1644  Data.Empty = Record.readInt();
1645  Data.Polymorphic = Record.readInt();
1646  Data.Abstract = Record.readInt();
1647  Data.IsStandardLayout = Record.readInt();
1648  Data.IsCXX11StandardLayout = Record.readInt();
1649  Data.HasBasesWithFields = Record.readInt();
1650  Data.HasBasesWithNonStaticDataMembers = Record.readInt();
1651  Data.HasPrivateFields = Record.readInt();
1652  Data.HasProtectedFields = Record.readInt();
1653  Data.HasPublicFields = Record.readInt();
1654  Data.HasMutableFields = Record.readInt();
1655  Data.HasVariantMembers = Record.readInt();
1656  Data.HasOnlyCMembers = Record.readInt();
1657  Data.HasInClassInitializer = Record.readInt();
1658  Data.HasUninitializedReferenceMember = Record.readInt();
1659  Data.HasUninitializedFields = Record.readInt();
1660  Data.HasInheritedConstructor = Record.readInt();
1661  Data.HasInheritedAssignment = Record.readInt();
1662  Data.NeedOverloadResolutionForCopyConstructor = Record.readInt();
1663  Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1664  Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1665  Data.NeedOverloadResolutionForDestructor = Record.readInt();
1666  Data.DefaultedCopyConstructorIsDeleted = Record.readInt();
1667  Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1668  Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1669  Data.DefaultedDestructorIsDeleted = Record.readInt();
1670  Data.HasTrivialSpecialMembers = Record.readInt();
1671  Data.HasTrivialSpecialMembersForCall = Record.readInt();
1672  Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1673  Data.DeclaredNonTrivialSpecialMembersForCall = Record.readInt();
1674  Data.HasIrrelevantDestructor = Record.readInt();
1675  Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1676  Data.HasDefaultedDefaultConstructor = Record.readInt();
1677  Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1678  Data.HasConstexprDefaultConstructor = Record.readInt();
1679  Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1680  Data.ComputedVisibleConversions = Record.readInt();
1681  Data.UserProvidedDefaultConstructor = Record.readInt();
1682  Data.DeclaredSpecialMembers = Record.readInt();
1683  Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1684  Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1685  Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1686  Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1687  Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1688  Data.ODRHash = Record.readInt();
1689  Data.HasODRHash = true;
1690 
1691  if (Record.readInt())
1692  Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1693 
1694  Data.NumBases = Record.readInt();
1695  if (Data.NumBases)
1696  Data.Bases = ReadGlobalOffset();
1697  Data.NumVBases = Record.readInt();
1698  if (Data.NumVBases)
1699  Data.VBases = ReadGlobalOffset();
1700 
1701  Record.readUnresolvedSet(Data.Conversions);
1702  Record.readUnresolvedSet(Data.VisibleConversions);
1703  assert(Data.Definition && "Data.Definition should be already set!");
1704  Data.FirstFriend = ReadDeclID();
1705 
1706  if (Data.IsLambda) {
1707  using Capture = LambdaCapture;
1708 
1709  auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1710  Lambda.Dependent = Record.readInt();
1711  Lambda.IsGenericLambda = Record.readInt();
1712  Lambda.CaptureDefault = Record.readInt();
1713  Lambda.NumCaptures = Record.readInt();
1714  Lambda.NumExplicitCaptures = Record.readInt();
1715  Lambda.ManglingNumber = Record.readInt();
1716  Lambda.ContextDecl = ReadDeclID();
1717  Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1718  sizeof(Capture) * Lambda.NumCaptures);
1719  Capture *ToCapture = Lambda.Captures;
1720  Lambda.MethodTyInfo = GetTypeSourceInfo();
1721  for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1722  SourceLocation Loc = ReadSourceLocation();
1723  bool IsImplicit = Record.readInt();
1724  auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1725  switch (Kind) {
1726  case LCK_StarThis:
1727  case LCK_This:
1728  case LCK_VLAType:
1729  *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1730  break;
1731  case LCK_ByCopy:
1732  case LCK_ByRef:
1733  auto *Var = ReadDeclAs<VarDecl>();
1734  SourceLocation EllipsisLoc = ReadSourceLocation();
1735  *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1736  break;
1737  }
1738  }
1739  }
1740 }
1741 
1742 void ASTDeclReader::MergeDefinitionData(
1743  CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1744  assert(D->DefinitionData &&
1745  "merging class definition into non-definition");
1746  auto &DD = *D->DefinitionData;
1747 
1748  if (DD.Definition != MergeDD.Definition) {
1749  // Track that we merged the definitions.
1750  Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1751  DD.Definition));
1752  Reader.PendingDefinitions.erase(MergeDD.Definition);
1753  MergeDD.Definition->setCompleteDefinition(false);
1754  Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1755  assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1756  "already loaded pending lookups for merged definition");
1757  }
1758 
1759  auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1760  if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1761  PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1762  // We faked up this definition data because we found a class for which we'd
1763  // not yet loaded the definition. Replace it with the real thing now.
1764  assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1765  PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1766 
1767  // Don't change which declaration is the definition; that is required
1768  // to be invariant once we select it.
1769  auto *Def = DD.Definition;
1770  DD = std::move(MergeDD);
1771  DD.Definition = Def;
1772  return;
1773  }
1774 
1775  // FIXME: Move this out into a .def file?
1776  bool DetectedOdrViolation = false;
1777 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1778 #define MATCH_FIELD(Field) \
1779  DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1780  OR_FIELD(Field)
1781  MATCH_FIELD(UserDeclaredConstructor)
1782  MATCH_FIELD(UserDeclaredSpecialMembers)
1783  MATCH_FIELD(Aggregate)
1784  MATCH_FIELD(PlainOldData)
1785  MATCH_FIELD(Empty)
1786  MATCH_FIELD(Polymorphic)
1787  MATCH_FIELD(Abstract)
1788  MATCH_FIELD(IsStandardLayout)
1789  MATCH_FIELD(IsCXX11StandardLayout)
1790  MATCH_FIELD(HasBasesWithFields)
1791  MATCH_FIELD(HasBasesWithNonStaticDataMembers)
1792  MATCH_FIELD(HasPrivateFields)
1793  MATCH_FIELD(HasProtectedFields)
1794  MATCH_FIELD(HasPublicFields)
1795  MATCH_FIELD(HasMutableFields)
1796  MATCH_FIELD(HasVariantMembers)
1797  MATCH_FIELD(HasOnlyCMembers)
1798  MATCH_FIELD(HasInClassInitializer)
1799  MATCH_FIELD(HasUninitializedReferenceMember)
1800  MATCH_FIELD(HasUninitializedFields)
1801  MATCH_FIELD(HasInheritedConstructor)
1802  MATCH_FIELD(HasInheritedAssignment)
1803  MATCH_FIELD(NeedOverloadResolutionForCopyConstructor)
1804  MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1805  MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1806  MATCH_FIELD(NeedOverloadResolutionForDestructor)
1807  MATCH_FIELD(DefaultedCopyConstructorIsDeleted)
1808  MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1809  MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1810  MATCH_FIELD(DefaultedDestructorIsDeleted)
1811  OR_FIELD(HasTrivialSpecialMembers)
1812  OR_FIELD(HasTrivialSpecialMembersForCall)
1813  OR_FIELD(DeclaredNonTrivialSpecialMembers)
1814  OR_FIELD(DeclaredNonTrivialSpecialMembersForCall)
1815  MATCH_FIELD(HasIrrelevantDestructor)
1816  OR_FIELD(HasConstexprNonCopyMoveConstructor)
1817  OR_FIELD(HasDefaultedDefaultConstructor)
1818  MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1819  OR_FIELD(HasConstexprDefaultConstructor)
1820  MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1821  // ComputedVisibleConversions is handled below.
1822  MATCH_FIELD(UserProvidedDefaultConstructor)
1823  OR_FIELD(DeclaredSpecialMembers)
1824  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1825  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1826  MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1827  OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1828  OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1829  MATCH_FIELD(IsLambda)
1830 #undef OR_FIELD
1831 #undef MATCH_FIELD
1832 
1833  if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1834  DetectedOdrViolation = true;
1835  // FIXME: Issue a diagnostic if the base classes don't match when we come
1836  // to lazily load them.
1837 
1838  // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1839  // match when we come to lazily load them.
1840  if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1841  DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1842  DD.ComputedVisibleConversions = true;
1843  }
1844 
1845  // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1846  // lazily load it.
1847 
1848  if (DD.IsLambda) {
1849  // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1850  // when they occur within the body of a function template specialization).
1851  }
1852 
1853  if (D->getODRHash() != MergeDD.ODRHash) {
1854  DetectedOdrViolation = true;
1855  }
1856 
1857  if (DetectedOdrViolation)
1858  Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1859  {MergeDD.Definition, &MergeDD});
1860 }
1861 
1862 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1863  struct CXXRecordDecl::DefinitionData *DD;
1864  ASTContext &C = Reader.getContext();
1865 
1866  // Determine whether this is a lambda closure type, so that we can
1867  // allocate the appropriate DefinitionData structure.
1868  bool IsLambda = Record.readInt();
1869  if (IsLambda)
1870  DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1871  LCD_None);
1872  else
1873  DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1874 
1875  CXXRecordDecl *Canon = D->getCanonicalDecl();
1876  // Set decl definition data before reading it, so that during deserialization
1877  // when we read CXXRecordDecl, it already has definition data and we don't
1878  // set fake one.
1879  if (!Canon->DefinitionData)
1880  Canon->DefinitionData = DD;
1881  D->DefinitionData = Canon->DefinitionData;
1882  ReadCXXDefinitionData(*DD, D);
1883 
1884  // We might already have a different definition for this record. This can
1885  // happen either because we're reading an update record, or because we've
1886  // already done some merging. Either way, just merge into it.
1887  if (Canon->DefinitionData != DD) {
1888  MergeDefinitionData(Canon, std::move(*DD));
1889  return;
1890  }
1891 
1892  // Mark this declaration as being a definition.
1893  D->setCompleteDefinition(true);
1894 
1895  // If this is not the first declaration or is an update record, we can have
1896  // other redeclarations already. Make a note that we need to propagate the
1897  // DefinitionData pointer onto them.
1898  if (Update || Canon != D)
1899  Reader.PendingDefinitions.insert(D);
1900 }
1901 
1902 ASTDeclReader::RedeclarableResult
1904  RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1905 
1906  ASTContext &C = Reader.getContext();
1907 
1908  enum CXXRecKind {
1909  CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1910  };
1911  switch ((CXXRecKind)Record.readInt()) {
1912  case CXXRecNotTemplate:
1913  // Merged when we merge the folding set entry in the primary template.
1914  if (!isa<ClassTemplateSpecializationDecl>(D))
1915  mergeRedeclarable(D, Redecl);
1916  break;
1917  case CXXRecTemplate: {
1918  // Merged when we merge the template.
1919  auto *Template = ReadDeclAs<ClassTemplateDecl>();
1920  D->TemplateOrInstantiation = Template;
1921  if (!Template->getTemplatedDecl()) {
1922  // We've not actually loaded the ClassTemplateDecl yet, because we're
1923  // currently being loaded as its pattern. Rely on it to set up our
1924  // TypeForDecl (see VisitClassTemplateDecl).
1925  //
1926  // Beware: we do not yet know our canonical declaration, and may still
1927  // get merged once the surrounding class template has got off the ground.
1928  DeferredTypeID = 0;
1929  }
1930  break;
1931  }
1932  case CXXRecMemberSpecialization: {
1933  auto *RD = ReadDeclAs<CXXRecordDecl>();
1934  auto TSK = (TemplateSpecializationKind)Record.readInt();
1935  SourceLocation POI = ReadSourceLocation();
1936  MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1937  MSI->setPointOfInstantiation(POI);
1938  D->TemplateOrInstantiation = MSI;
1939  mergeRedeclarable(D, Redecl);
1940  break;
1941  }
1942  }
1943 
1944  bool WasDefinition = Record.readInt();
1945  if (WasDefinition)
1946  ReadCXXRecordDefinition(D, /*Update*/false);
1947  else
1948  // Propagate DefinitionData pointer from the canonical declaration.
1949  D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1950 
1951  // Lazily load the key function to avoid deserializing every method so we can
1952  // compute it.
1953  if (WasDefinition) {
1954  DeclID KeyFn = ReadDeclID();
1955  if (KeyFn && D->isCompleteDefinition())
1956  // FIXME: This is wrong for the ARM ABI, where some other module may have
1957  // made this function no longer be a key function. We need an update
1958  // record or similar for that case.
1959  C.KeyFunctions[D] = KeyFn;
1960  }
1961 
1962  return Redecl;
1963 }
1964 
1966  VisitFunctionDecl(D);
1967  D->setIsCopyDeductionCandidate(Record.readInt());
1968 }
1969 
1971  VisitFunctionDecl(D);
1972 
1973  unsigned NumOverridenMethods = Record.readInt();
1974  if (D->isCanonicalDecl()) {
1975  while (NumOverridenMethods--) {
1976  // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1977  // MD may be initializing.
1978  if (auto *MD = ReadDeclAs<CXXMethodDecl>())
1979  Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1980  }
1981  } else {
1982  // We don't care about which declarations this used to override; we get
1983  // the relevant information from the canonical declaration.
1984  Record.skipInts(NumOverridenMethods);
1985  }
1986 }
1987 
1989  // We need the inherited constructor information to merge the declaration,
1990  // so we have to read it before we call VisitCXXMethodDecl.
1991  if (D->isInheritingConstructor()) {
1992  auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1993  auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1994  *D->getTrailingObjects<InheritedConstructor>() =
1995  InheritedConstructor(Shadow, Ctor);
1996  }
1997 
1998  VisitCXXMethodDecl(D);
1999 }
2000 
2002  VisitCXXMethodDecl(D);
2003 
2004  if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
2005  CXXDestructorDecl *Canon = D->getCanonicalDecl();
2006  auto *ThisArg = Record.readExpr();
2007  // FIXME: Check consistency if we have an old and new operator delete.
2008  if (!Canon->OperatorDelete) {
2009  Canon->OperatorDelete = OperatorDelete;
2010  Canon->OperatorDeleteThisArg = ThisArg;
2011  }
2012  }
2013 }
2014 
2016  VisitCXXMethodDecl(D);
2017 }
2018 
2020  VisitDecl(D);
2021  D->ImportedAndComplete.setPointer(readModule());
2022  D->ImportedAndComplete.setInt(Record.readInt());
2023  auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
2024  for (unsigned I = 0, N = Record.back(); I != N; ++I)
2025  StoredLocs[I] = ReadSourceLocation();
2026  Record.skipInts(1); // The number of stored source locations.
2027 }
2028 
2030  VisitDecl(D);
2031  D->setColonLoc(ReadSourceLocation());
2032 }
2033 
2035  VisitDecl(D);
2036  if (Record.readInt()) // hasFriendDecl
2037  D->Friend = ReadDeclAs<NamedDecl>();
2038  else
2039  D->Friend = GetTypeSourceInfo();
2040  for (unsigned i = 0; i != D->NumTPLists; ++i)
2041  D->getTrailingObjects<TemplateParameterList *>()[i] =
2042  Record.readTemplateParameterList();
2043  D->NextFriend = ReadDeclID();
2044  D->UnsupportedFriend = (Record.readInt() != 0);
2045  D->FriendLoc = ReadSourceLocation();
2046 }
2047 
2049  VisitDecl(D);
2050  unsigned NumParams = Record.readInt();
2051  D->NumParams = NumParams;
2052  D->Params = new TemplateParameterList*[NumParams];
2053  for (unsigned i = 0; i != NumParams; ++i)
2054  D->Params[i] = Record.readTemplateParameterList();
2055  if (Record.readInt()) // HasFriendDecl
2056  D->Friend = ReadDeclAs<NamedDecl>();
2057  else
2058  D->Friend = GetTypeSourceInfo();
2059  D->FriendLoc = ReadSourceLocation();
2060 }
2061 
2063  VisitNamedDecl(D);
2064 
2065  DeclID PatternID = ReadDeclID();
2066  auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2067  TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2068  // FIXME handle associated constraints
2069  D->init(TemplatedDecl, TemplateParams);
2070 
2071  return PatternID;
2072 }
2073 
2074 ASTDeclReader::RedeclarableResult
2076  RedeclarableResult Redecl = VisitRedeclarable(D);
2077 
2078  // Make sure we've allocated the Common pointer first. We do this before
2079  // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2081  if (!CanonD->Common) {
2082  CanonD->Common = CanonD->newCommon(Reader.getContext());
2083  Reader.PendingDefinitions.insert(CanonD);
2084  }
2085  D->Common = CanonD->Common;
2086 
2087  // If this is the first declaration of the template, fill in the information
2088  // for the 'common' pointer.
2089  if (ThisDeclID == Redecl.getFirstID()) {
2090  if (auto *RTD = ReadDeclAs<RedeclarableTemplateDecl>()) {
2091  assert(RTD->getKind() == D->getKind() &&
2092  "InstantiatedFromMemberTemplate kind mismatch");
2094  if (Record.readInt())
2096  }
2097  }
2098 
2099  DeclID PatternID = VisitTemplateDecl(D);
2100  D->IdentifierNamespace = Record.readInt();
2101 
2102  mergeRedeclarable(D, Redecl, PatternID);
2103 
2104  // If we merged the template with a prior declaration chain, merge the common
2105  // pointer.
2106  // FIXME: Actually merge here, don't just overwrite.
2107  D->Common = D->getCanonicalDecl()->Common;
2108 
2109  return Redecl;
2110 }
2111 
2113  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2114 
2115  if (ThisDeclID == Redecl.getFirstID()) {
2116  // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2117  // the specializations.
2119  ReadDeclIDList(SpecIDs);
2121  }
2122 
2123  if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2124  // We were loaded before our templated declaration was. We've not set up
2125  // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2126  // it now.
2127  Reader.getContext().getInjectedClassNameType(
2129  }
2130 }
2131 
2133  llvm_unreachable("BuiltinTemplates are not serialized");
2134 }
2135 
2136 /// TODO: Unify with ClassTemplateDecl version?
2137 /// May require unifying ClassTemplateDecl and
2138 /// VarTemplateDecl beyond TemplateDecl...
2140  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2141 
2142  if (ThisDeclID == Redecl.getFirstID()) {
2143  // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2144  // the specializations.
2146  ReadDeclIDList(SpecIDs);
2148  }
2149 }
2150 
2151 ASTDeclReader::RedeclarableResult
2154  RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2155 
2156  ASTContext &C = Reader.getContext();
2157  if (Decl *InstD = ReadDecl()) {
2158  if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2159  D->SpecializedTemplate = CTD;
2160  } else {
2162  Record.readTemplateArgumentList(TemplArgs);
2163  TemplateArgumentList *ArgList
2164  = TemplateArgumentList::CreateCopy(C, TemplArgs);
2165  auto *PS =
2167  SpecializedPartialSpecialization();
2168  PS->PartialSpecialization
2169  = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2170  PS->TemplateArgs = ArgList;
2171  D->SpecializedTemplate = PS;
2172  }
2173  }
2174 
2176  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2177  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2178  D->PointOfInstantiation = ReadSourceLocation();
2179  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2180 
2181  bool writtenAsCanonicalDecl = Record.readInt();
2182  if (writtenAsCanonicalDecl) {
2183  auto *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2184  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2185  // Set this as, or find, the canonical declaration for this specialization
2187  if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2188  CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2189  .GetOrInsertNode(Partial);
2190  } else {
2191  CanonSpec =
2192  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2193  }
2194  // If there was already a canonical specialization, merge into it.
2195  if (CanonSpec != D) {
2196  mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2197 
2198  // This declaration might be a definition. Merge with any existing
2199  // definition.
2200  if (auto *DDD = D->DefinitionData) {
2201  if (CanonSpec->DefinitionData)
2202  MergeDefinitionData(CanonSpec, std::move(*DDD));
2203  else
2204  CanonSpec->DefinitionData = D->DefinitionData;
2205  }
2206  D->DefinitionData = CanonSpec->DefinitionData;
2207  }
2208  }
2209  }
2210 
2211  // Explicit info.
2212  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2213  auto *ExplicitInfo =
2214  new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2215  ExplicitInfo->TypeAsWritten = TyInfo;
2216  ExplicitInfo->ExternLoc = ReadSourceLocation();
2217  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2218  D->ExplicitInfo = ExplicitInfo;
2219  }
2220 
2221  return Redecl;
2222 }
2223 
2226  RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2227 
2228  D->TemplateParams = Record.readTemplateParameterList();
2229  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2230 
2231  // These are read/set from/to the first declaration.
2232  if (ThisDeclID == Redecl.getFirstID()) {
2233  D->InstantiatedFromMember.setPointer(
2234  ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2235  D->InstantiatedFromMember.setInt(Record.readInt());
2236  }
2237 }
2238 
2241  VisitDecl(D);
2242  D->Specialization = ReadDeclAs<CXXMethodDecl>();
2243 }
2244 
2246  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2247 
2248  if (ThisDeclID == Redecl.getFirstID()) {
2249  // This FunctionTemplateDecl owns a CommonPtr; read it.
2251  ReadDeclIDList(SpecIDs);
2253  }
2254 }
2255 
2256 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2257 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2258 /// VarTemplate(Partial)SpecializationDecl with a new data
2259 /// structure Template(Partial)SpecializationDecl, and
2260 /// using Template(Partial)SpecializationDecl as input type.
2261 ASTDeclReader::RedeclarableResult
2264  RedeclarableResult Redecl = VisitVarDeclImpl(D);
2265 
2266  ASTContext &C = Reader.getContext();
2267  if (Decl *InstD = ReadDecl()) {
2268  if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2269  D->SpecializedTemplate = VTD;
2270  } else {
2272  Record.readTemplateArgumentList(TemplArgs);
2274  C, TemplArgs);
2275  auto *PS =
2276  new (C)
2277  VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2278  PS->PartialSpecialization =
2279  cast<VarTemplatePartialSpecializationDecl>(InstD);
2280  PS->TemplateArgs = ArgList;
2281  D->SpecializedTemplate = PS;
2282  }
2283  }
2284 
2285  // Explicit info.
2286  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2287  auto *ExplicitInfo =
2288  new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2289  ExplicitInfo->TypeAsWritten = TyInfo;
2290  ExplicitInfo->ExternLoc = ReadSourceLocation();
2291  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2292  D->ExplicitInfo = ExplicitInfo;
2293  }
2294 
2296  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2297  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2298  D->PointOfInstantiation = ReadSourceLocation();
2299  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2300  D->IsCompleteDefinition = Record.readInt();
2301 
2302  bool writtenAsCanonicalDecl = Record.readInt();
2303  if (writtenAsCanonicalDecl) {
2304  auto *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2305  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2306  // FIXME: If it's already present, merge it.
2307  if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2308  CanonPattern->getCommonPtr()->PartialSpecializations
2309  .GetOrInsertNode(Partial);
2310  } else {
2311  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2312  }
2313  }
2314  }
2315 
2316  return Redecl;
2317 }
2318 
2319 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2320 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2321 /// VarTemplate(Partial)SpecializationDecl with a new data
2322 /// structure Template(Partial)SpecializationDecl, and
2323 /// using Template(Partial)SpecializationDecl as input type.
2326  RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2327 
2328  D->TemplateParams = Record.readTemplateParameterList();
2329  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2330 
2331  // These are read/set from/to the first declaration.
2332  if (ThisDeclID == Redecl.getFirstID()) {
2333  D->InstantiatedFromMember.setPointer(
2334  ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2335  D->InstantiatedFromMember.setInt(Record.readInt());
2336  }
2337 }
2338 
2340  VisitTypeDecl(D);
2341 
2342  D->setDeclaredWithTypename(Record.readInt());
2343 
2344  if (Record.readInt())
2345  D->setDefaultArgument(GetTypeSourceInfo());
2346 }
2347 
2349  VisitDeclaratorDecl(D);
2350  // TemplateParmPosition.
2351  D->setDepth(Record.readInt());
2352  D->setPosition(Record.readInt());
2353  if (D->isExpandedParameterPack()) {
2354  auto TypesAndInfos =
2355  D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2356  for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2357  new (&TypesAndInfos[I].first) QualType(Record.readType());
2358  TypesAndInfos[I].second = GetTypeSourceInfo();
2359  }
2360  } else {
2361  // Rest of NonTypeTemplateParmDecl.
2362  D->ParameterPack = Record.readInt();
2363  if (Record.readInt())
2364  D->setDefaultArgument(Record.readExpr());
2365  }
2366 }
2367 
2369  VisitTemplateDecl(D);
2370  // TemplateParmPosition.
2371  D->setDepth(Record.readInt());
2372  D->setPosition(Record.readInt());
2373  if (D->isExpandedParameterPack()) {
2374  auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2375  for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2376  I != N; ++I)
2377  Data[I] = Record.readTemplateParameterList();
2378  } else {
2379  // Rest of TemplateTemplateParmDecl.
2380  D->ParameterPack = Record.readInt();
2381  if (Record.readInt())
2382  D->setDefaultArgument(Reader.getContext(),
2383  Record.readTemplateArgumentLoc());
2384  }
2385 }
2386 
2388  VisitRedeclarableTemplateDecl(D);
2389 }
2390 
2392  VisitDecl(D);
2393  D->AssertExprAndFailed.setPointer(Record.readExpr());
2394  D->AssertExprAndFailed.setInt(Record.readInt());
2395  D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2396  D->RParenLoc = ReadSourceLocation();
2397 }
2398 
2400  VisitDecl(D);
2401 }
2402 
2403 std::pair<uint64_t, uint64_t>
2405  uint64_t LexicalOffset = ReadLocalOffset();
2406  uint64_t VisibleOffset = ReadLocalOffset();
2407  return std::make_pair(LexicalOffset, VisibleOffset);
2408 }
2409 
2410 template <typename T>
2411 ASTDeclReader::RedeclarableResult
2413  DeclID FirstDeclID = ReadDeclID();
2414  Decl *MergeWith = nullptr;
2415 
2416  bool IsKeyDecl = ThisDeclID == FirstDeclID;
2417  bool IsFirstLocalDecl = false;
2418 
2419  uint64_t RedeclOffset = 0;
2420 
2421  // 0 indicates that this declaration was the only declaration of its entity,
2422  // and is used for space optimization.
2423  if (FirstDeclID == 0) {
2424  FirstDeclID = ThisDeclID;
2425  IsKeyDecl = true;
2426  IsFirstLocalDecl = true;
2427  } else if (unsigned N = Record.readInt()) {
2428  // This declaration was the first local declaration, but may have imported
2429  // other declarations.
2430  IsKeyDecl = N == 1;
2431  IsFirstLocalDecl = true;
2432 
2433  // We have some declarations that must be before us in our redeclaration
2434  // chain. Read them now, and remember that we ought to merge with one of
2435  // them.
2436  // FIXME: Provide a known merge target to the second and subsequent such
2437  // declaration.
2438  for (unsigned I = 0; I != N - 1; ++I)
2439  MergeWith = ReadDecl();
2440 
2441  RedeclOffset = ReadLocalOffset();
2442  } else {
2443  // This declaration was not the first local declaration. Read the first
2444  // local declaration now, to trigger the import of other redeclarations.
2445  (void)ReadDecl();
2446  }
2447 
2448  auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2449  if (FirstDecl != D) {
2450  // We delay loading of the redeclaration chain to avoid deeply nested calls.
2451  // We temporarily set the first (canonical) declaration as the previous one
2452  // which is the one that matters and mark the real previous DeclID to be
2453  // loaded & attached later on.
2455  D->First = FirstDecl->getCanonicalDecl();
2456  }
2457 
2458  auto *DAsT = static_cast<T *>(D);
2459 
2460  // Note that we need to load local redeclarations of this decl and build a
2461  // decl chain for them. This must happen *after* we perform the preloading
2462  // above; this ensures that the redeclaration chain is built in the correct
2463  // order.
2464  if (IsFirstLocalDecl)
2465  Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2466 
2467  return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2468 }
2469 
2470 /// Attempts to merge the given declaration (D) with another declaration
2471 /// of the same entity.
2472 template<typename T>
2474  RedeclarableResult &Redecl,
2475  DeclID TemplatePatternID) {
2476  // If modules are not available, there is no reason to perform this merge.
2477  if (!Reader.getContext().getLangOpts().Modules)
2478  return;
2479 
2480  // If we're not the canonical declaration, we don't need to merge.
2481  if (!DBase->isFirstDecl())
2482  return;
2483 
2484  auto *D = static_cast<T *>(DBase);
2485 
2486  if (auto *Existing = Redecl.getKnownMergeTarget())
2487  // We already know of an existing declaration we should merge with.
2488  mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2489  else if (FindExistingResult ExistingRes = findExisting(D))
2490  if (T *Existing = ExistingRes)
2491  mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2492 }
2493 
2494 /// "Cast" to type T, asserting if we don't have an implicit conversion.
2495 /// We use this to put code in a template that will only be valid for certain
2496 /// instantiations.
2497 template<typename T> static T assert_cast(T t) { return t; }
2498 template<typename T> static T assert_cast(...) {
2499  llvm_unreachable("bad assert_cast");
2500 }
2501 
2502 /// Merge together the pattern declarations from two template
2503 /// declarations.
2505  RedeclarableTemplateDecl *Existing,
2506  DeclID DsID, bool IsKeyDecl) {
2507  auto *DPattern = D->getTemplatedDecl();
2508  auto *ExistingPattern = Existing->getTemplatedDecl();
2509  RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2510  DPattern->getCanonicalDecl()->getGlobalID(),
2511  IsKeyDecl);
2512 
2513  if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2514  // Merge with any existing definition.
2515  // FIXME: This is duplicated in several places. Refactor.
2516  auto *ExistingClass =
2517  cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2518  if (auto *DDD = DClass->DefinitionData) {
2519  if (ExistingClass->DefinitionData) {
2520  MergeDefinitionData(ExistingClass, std::move(*DDD));
2521  } else {
2522  ExistingClass->DefinitionData = DClass->DefinitionData;
2523  // We may have skipped this before because we thought that DClass
2524  // was the canonical declaration.
2525  Reader.PendingDefinitions.insert(DClass);
2526  }
2527  }
2528  DClass->DefinitionData = ExistingClass->DefinitionData;
2529 
2530  return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2531  Result);
2532  }
2533  if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2534  return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2535  Result);
2536  if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2537  return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2538  if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2539  return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2540  Result);
2541  llvm_unreachable("merged an unknown kind of redeclarable template");
2542 }
2543 
2544 /// Attempts to merge the given declaration (D) with another declaration
2545 /// of the same entity.
2546 template<typename T>
2548  RedeclarableResult &Redecl,
2549  DeclID TemplatePatternID) {
2550  auto *D = static_cast<T *>(DBase);
2551  T *ExistingCanon = Existing->getCanonicalDecl();
2552  T *DCanon = D->getCanonicalDecl();
2553  if (ExistingCanon != DCanon) {
2554  assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2555  "already merged this declaration");
2556 
2557  // Have our redeclaration link point back at the canonical declaration
2558  // of the existing declaration, so that this declaration has the
2559  // appropriate canonical declaration.
2560  D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2561  D->First = ExistingCanon;
2562  ExistingCanon->Used |= D->Used;
2563  D->Used = false;
2564 
2565  // When we merge a namespace, update its pointer to the first namespace.
2566  // We cannot have loaded any redeclarations of this declaration yet, so
2567  // there's nothing else that needs to be updated.
2568  if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2569  Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2570  assert_cast<NamespaceDecl*>(ExistingCanon));
2571 
2572  // When we merge a template, merge its pattern.
2573  if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2574  mergeTemplatePattern(
2575  DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2576  TemplatePatternID, Redecl.isKeyDecl());
2577 
2578  // If this declaration is a key declaration, make a note of that.
2579  if (Redecl.isKeyDecl())
2580  Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2581  }
2582 }
2583 
2584 /// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2585 /// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2586 /// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2587 /// that some types are mergeable during deserialization, otherwise name
2588 /// lookup fails. This is the case for EnumConstantDecl.
2590  if (!ND)
2591  return false;
2592  // TODO: implement merge for other necessary decls.
2593  if (isa<EnumConstantDecl>(ND))
2594  return true;
2595  return false;
2596 }
2597 
2598 /// Attempts to merge the given declaration (D) with another declaration
2599 /// of the same entity, for the case where the entity is not actually
2600 /// redeclarable. This happens, for instance, when merging the fields of
2601 /// identical class definitions from two different modules.
2602 template<typename T>
2604  // If modules are not available, there is no reason to perform this merge.
2605  if (!Reader.getContext().getLangOpts().Modules)
2606  return;
2607 
2608  // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2609  // Note that C identically-named things in different translation units are
2610  // not redeclarations, but may still have compatible types, where ODR-like
2611  // semantics may apply.
2612  if (!Reader.getContext().getLangOpts().CPlusPlus &&
2613  !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2614  return;
2615 
2616  if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2617  if (T *Existing = ExistingRes)
2618  Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2619  Existing->getCanonicalDecl());
2620 }
2621 
2623  VisitDecl(D);
2624  unsigned NumVars = D->varlist_size();
2626  Vars.reserve(NumVars);
2627  for (unsigned i = 0; i != NumVars; ++i) {
2628  Vars.push_back(Record.readExpr());
2629  }
2630  D->setVars(Vars);
2631 }
2632 
2634  VisitValueDecl(D);
2635  D->setLocation(ReadSourceLocation());
2636  Expr *In = Record.readExpr();
2637  Expr *Out = Record.readExpr();
2638  D->setCombinerData(In, Out);
2639  Expr *Combiner = Record.readExpr();
2640  D->setCombiner(Combiner);
2641  Expr *Orig = Record.readExpr();
2642  Expr *Priv = Record.readExpr();
2643  D->setInitializerData(Orig, Priv);
2644  Expr *Init = Record.readExpr();
2645  auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2646  D->setInitializer(Init, IK);
2647  D->PrevDeclInScope = ReadDeclID();
2648 }
2649 
2651  VisitVarDecl(D);
2652 }
2653 
2654 //===----------------------------------------------------------------------===//
2655 // Attribute Reading
2656 //===----------------------------------------------------------------------===//
2657 
2658 namespace {
2659 class AttrReader {
2660  ModuleFile *F;
2661  ASTReader *Reader;
2662  const ASTReader::RecordData &Record;
2663  unsigned &Idx;
2664 
2665 public:
2666  AttrReader(ModuleFile &F, ASTReader &Reader,
2667  const ASTReader::RecordData &Record, unsigned &Idx)
2668  : F(&F), Reader(&Reader), Record(Record), Idx(Idx) {}
2669 
2670  const uint64_t &readInt() { return Record[Idx++]; }
2671 
2672  SourceRange readSourceRange() {
2673  return Reader->ReadSourceRange(*F, Record, Idx);
2674  }
2675 
2676  Expr *readExpr() { return Reader->ReadExpr(*F); }
2677 
2678  std::string readString() {
2679  return Reader->ReadString(Record, Idx);
2680  }
2681 
2682  TypeSourceInfo *getTypeSourceInfo() {
2683  return Reader->GetTypeSourceInfo(*F, Record, Idx);
2684  }
2685 
2686  IdentifierInfo *getIdentifierInfo() {
2687  return Reader->GetIdentifierInfo(*F, Record, Idx);
2688  }
2689 
2690  VersionTuple readVersionTuple() {
2691  return ASTReader::ReadVersionTuple(Record, Idx);
2692  }
2693 
2694  template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2695  return cast_or_null<T>(Reader->GetLocalDecl(*F, LocalID));
2696  }
2697 };
2698 }
2699 
2701  unsigned &Idx) {
2702  AttrReader Record(M, *this, Rec, Idx);
2703  auto V = Record.readInt();
2704  if (!V)
2705  return nullptr;
2706 
2707  Attr *New = nullptr;
2708  // Kind is stored as a 1-based integer because 0 is used to indicate a null
2709  // Attr pointer.
2710  auto Kind = static_cast<attr::Kind>(V - 1);
2711  SourceRange Range = Record.readSourceRange();
2712  ASTContext &Context = getContext();
2713 
2714 #include "clang/Serialization/AttrPCHRead.inc"
2715 
2716  assert(New && "Unable to decode attribute?");
2717  return New;
2718 }
2719 
2720 /// Reads attributes from the current stream position.
2722  for (unsigned I = 0, E = Record.readInt(); I != E; ++I)
2723  Attrs.push_back(Record.readAttr());
2724 }
2725 
2726 //===----------------------------------------------------------------------===//
2727 // ASTReader Implementation
2728 //===----------------------------------------------------------------------===//
2729 
2730 /// Note that we have loaded the declaration with the given
2731 /// Index.
2732 ///
2733 /// This routine notes that this declaration has already been loaded,
2734 /// so that future GetDecl calls will return this declaration rather
2735 /// than trying to load a new declaration.
2736 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2737  assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2738  DeclsLoaded[Index] = D;
2739 }
2740 
2741 /// Determine whether the consumer will be interested in seeing
2742 /// this declaration (via HandleTopLevelDecl).
2743 ///
2744 /// This routine should return true for anything that might affect
2745 /// code generation, e.g., inline function definitions, Objective-C
2746 /// declarations with metadata, etc.
2747 static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2748  // An ObjCMethodDecl is never considered as "interesting" because its
2749  // implementation container always is.
2750 
2751  // An ImportDecl or VarDecl imported from a module map module will get
2752  // emitted when we import the relevant module.
2753  if (isa<ImportDecl>(D) || isa<VarDecl>(D)) {
2754  auto *M = D->getImportedOwningModule();
2755  if (M && M->Kind == Module::ModuleMapModule &&
2756  Ctx.DeclMustBeEmitted(D))
2757  return false;
2758  }
2759 
2760  if (isa<FileScopeAsmDecl>(D) ||
2761  isa<ObjCProtocolDecl>(D) ||
2762  isa<ObjCImplDecl>(D) ||
2763  isa<ImportDecl>(D) ||
2764  isa<PragmaCommentDecl>(D) ||
2765  isa<PragmaDetectMismatchDecl>(D))
2766  return true;
2767  if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D))
2768  return !D->getDeclContext()->isFunctionOrMethod();
2769  if (const auto *Var = dyn_cast<VarDecl>(D))
2770  return Var->isFileVarDecl() &&
2771  (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2772  OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2773  if (const auto *Func = dyn_cast<FunctionDecl>(D))
2774  return Func->doesThisDeclarationHaveABody() || HasBody;
2775 
2776  if (auto *ES = D->getASTContext().getExternalSource())
2777  if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2778  return true;
2779 
2780  return false;
2781 }
2782 
2783 /// Get the correct cursor and offset for loading a declaration.
2784 ASTReader::RecordLocation
2785 ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2786  GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2787  assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2788  ModuleFile *M = I->second;
2789  const DeclOffset &DOffs =
2790  M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2791  Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2792  return RecordLocation(M, DOffs.BitOffset);
2793 }
2794 
2795 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2796  auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2797 
2798  assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2799  return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2800 }
2801 
2802 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2803  return LocalOffset + M.GlobalBitOffset;
2804 }
2805 
2807  const TemplateParameterList *Y);
2808 
2809 /// Determine whether two template parameters are similar enough
2810 /// that they may be used in declarations of the same template.
2811 static bool isSameTemplateParameter(const NamedDecl *X,
2812  const NamedDecl *Y) {
2813  if (X->getKind() != Y->getKind())
2814  return false;
2815 
2816  if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2817  const auto *TY = cast<TemplateTypeParmDecl>(Y);
2818  return TX->isParameterPack() == TY->isParameterPack();
2819  }
2820 
2821  if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2822  const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2823  return TX->isParameterPack() == TY->isParameterPack() &&
2824  TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2825  }
2826 
2827  const auto *TX = cast<TemplateTemplateParmDecl>(X);
2828  const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2829  return TX->isParameterPack() == TY->isParameterPack() &&
2830  isSameTemplateParameterList(TX->getTemplateParameters(),
2831  TY->getTemplateParameters());
2832 }
2833 
2835  if (auto *NS = X->getAsNamespace())
2836  return NS;
2837  if (auto *NAS = X->getAsNamespaceAlias())
2838  return NAS->getNamespace();
2839  return nullptr;
2840 }
2841 
2843  const NestedNameSpecifier *Y) {
2844  if (auto *NSX = getNamespace(X)) {
2845  auto *NSY = getNamespace(Y);
2846  if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2847  return false;
2848  } else if (X->getKind() != Y->getKind())
2849  return false;
2850 
2851  // FIXME: For namespaces and types, we're permitted to check that the entity
2852  // is named via the same tokens. We should probably do so.
2853  switch (X->getKind()) {
2855  if (X->getAsIdentifier() != Y->getAsIdentifier())
2856  return false;
2857  break;
2860  // We've already checked that we named the same namespace.
2861  break;
2864  if (X->getAsType()->getCanonicalTypeInternal() !=
2866  return false;
2867  break;
2870  return true;
2871  }
2872 
2873  // Recurse into earlier portion of NNS, if any.
2874  auto *PX = X->getPrefix();
2875  auto *PY = Y->getPrefix();
2876  if (PX && PY)
2877  return isSameQualifier(PX, PY);
2878  return !PX && !PY;
2879 }
2880 
2881 /// Determine whether two template parameter lists are similar enough
2882 /// that they may be used in declarations of the same template.
2884  const TemplateParameterList *Y) {
2885  if (X->size() != Y->size())
2886  return false;
2887 
2888  for (unsigned I = 0, N = X->size(); I != N; ++I)
2889  if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2890  return false;
2891 
2892  return true;
2893 }
2894 
2895 /// Determine whether the attributes we can overload on are identical for A and
2896 /// B. Will ignore any overloadable attrs represented in the type of A and B.
2898  const FunctionDecl *B) {
2899  // Note that pass_object_size attributes are represented in the function's
2900  // ExtParameterInfo, so we don't need to check them here.
2901 
2902  // Return false if any of the enable_if expressions of A and B are different.
2903  llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2904  auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
2905  auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
2906  auto AEnableIf = AEnableIfAttrs.begin();
2907  auto BEnableIf = BEnableIfAttrs.begin();
2908  for (; AEnableIf != AEnableIfAttrs.end() && BEnableIf != BEnableIfAttrs.end();
2909  ++BEnableIf, ++AEnableIf) {
2910  Cand1ID.clear();
2911  Cand2ID.clear();
2912 
2913  AEnableIf->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2914  BEnableIf->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2915  if (Cand1ID != Cand2ID)
2916  return false;
2917  }
2918 
2919  // Return false if the number of enable_if attributes was different.
2920  return AEnableIf == AEnableIfAttrs.end() && BEnableIf == BEnableIfAttrs.end();
2921 }
2922 
2923 /// Determine whether the two declarations refer to the same entity.
2924 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2925  assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2926 
2927  if (X == Y)
2928  return true;
2929 
2930  // Must be in the same context.
2931  //
2932  // Note that we can't use DeclContext::Equals here, because the DeclContexts
2933  // could be two different declarations of the same function. (We will fix the
2934  // semantic DC to refer to the primary definition after merging.)
2935  if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
2936  cast<Decl>(Y->getDeclContext()->getRedeclContext())))
2937  return false;
2938 
2939  // Two typedefs refer to the same entity if they have the same underlying
2940  // type.
2941  if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
2942  if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2943  return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2944  TypedefY->getUnderlyingType());
2945 
2946  // Must have the same kind.
2947  if (X->getKind() != Y->getKind())
2948  return false;
2949 
2950  // Objective-C classes and protocols with the same name always match.
2951  if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2952  return true;
2953 
2954  if (isa<ClassTemplateSpecializationDecl>(X)) {
2955  // No need to handle these here: we merge them when adding them to the
2956  // template.
2957  return false;
2958  }
2959 
2960  // Compatible tags match.
2961  if (const auto *TagX = dyn_cast<TagDecl>(X)) {
2962  const auto *TagY = cast<TagDecl>(Y);
2963  return (TagX->getTagKind() == TagY->getTagKind()) ||
2964  ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2965  TagX->getTagKind() == TTK_Interface) &&
2966  (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2967  TagY->getTagKind() == TTK_Interface));
2968  }
2969 
2970  // Functions with the same type and linkage match.
2971  // FIXME: This needs to cope with merging of prototyped/non-prototyped
2972  // functions, etc.
2973  if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
2974  const auto *FuncY = cast<FunctionDecl>(Y);
2975  if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
2976  const auto *CtorY = cast<CXXConstructorDecl>(Y);
2977  if (CtorX->getInheritedConstructor() &&
2978  !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
2979  CtorY->getInheritedConstructor().getConstructor()))
2980  return false;
2981  }
2982 
2983  if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
2984  return false;
2985 
2986  // Multiversioned functions with different feature strings are represented
2987  // as separate declarations.
2988  if (FuncX->isMultiVersion()) {
2989  const auto *TAX = FuncX->getAttr<TargetAttr>();
2990  const auto *TAY = FuncY->getAttr<TargetAttr>();
2991  assert(TAX && TAY && "Multiversion Function without target attribute");
2992 
2993  if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
2994  return false;
2995  }
2996 
2997  ASTContext &C = FuncX->getASTContext();
2998  auto GetTypeAsWritten = [](const FunctionDecl *FD) {
2999  // Map to the first declaration that we've already merged into this one.
3000  // The TSI of redeclarations might not match (due to calling conventions
3001  // being inherited onto the type but not the TSI), but the TSI type of
3002  // the first declaration of the function should match across modules.
3003  FD = FD->getCanonicalDecl();
3004  return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3005  : FD->getType();
3006  };
3007  QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3008  if (!C.hasSameType(XT, YT)) {
3009  // We can get functions with different types on the redecl chain in C++17
3010  // if they have differing exception specifications and at least one of
3011  // the excpetion specs is unresolved.
3012  auto *XFPT = XT->getAs<FunctionProtoType>();
3013  auto *YFPT = YT->getAs<FunctionProtoType>();
3014  if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3015  (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3018  return true;
3019  return false;
3020  }
3021  return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3022  hasSameOverloadableAttrs(FuncX, FuncY);
3023  }
3024 
3025  // Variables with the same type and linkage match.
3026  if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3027  const auto *VarY = cast<VarDecl>(Y);
3028  if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3029  ASTContext &C = VarX->getASTContext();
3030  if (C.hasSameType(VarX->getType(), VarY->getType()))
3031  return true;
3032 
3033  // We can get decls with different types on the redecl chain. Eg.
3034  // template <typename T> struct S { static T Var[]; }; // #1
3035  // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3036  // Only? happens when completing an incomplete array type. In this case
3037  // when comparing #1 and #2 we should go through their element type.
3038  const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3039  const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3040  if (!VarXTy || !VarYTy)
3041  return false;
3042  if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3043  return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3044  }
3045  return false;
3046  }
3047 
3048  // Namespaces with the same name and inlinedness match.
3049  if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3050  const auto *NamespaceY = cast<NamespaceDecl>(Y);
3051  return NamespaceX->isInline() == NamespaceY->isInline();
3052  }
3053 
3054  // Identical template names and kinds match if their template parameter lists
3055  // and patterns match.
3056  if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3057  const auto *TemplateY = cast<TemplateDecl>(Y);
3058  return isSameEntity(TemplateX->getTemplatedDecl(),
3059  TemplateY->getTemplatedDecl()) &&
3060  isSameTemplateParameterList(TemplateX->getTemplateParameters(),
3061  TemplateY->getTemplateParameters());
3062  }
3063 
3064  // Fields with the same name and the same type match.
3065  if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3066  const auto *FDY = cast<FieldDecl>(Y);
3067  // FIXME: Also check the bitwidth is odr-equivalent, if any.
3068  return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3069  }
3070 
3071  // Indirect fields with the same target field match.
3072  if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3073  const auto *IFDY = cast<IndirectFieldDecl>(Y);
3074  return IFDX->getAnonField()->getCanonicalDecl() ==
3075  IFDY->getAnonField()->getCanonicalDecl();
3076  }
3077 
3078  // Enumerators with the same name match.
3079  if (isa<EnumConstantDecl>(X))
3080  // FIXME: Also check the value is odr-equivalent.
3081  return true;
3082 
3083  // Using shadow declarations with the same target match.
3084  if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3085  const auto *USY = cast<UsingShadowDecl>(Y);
3086  return USX->getTargetDecl() == USY->getTargetDecl();
3087  }
3088 
3089  // Using declarations with the same qualifier match. (We already know that
3090  // the name matches.)
3091  if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3092  const auto *UY = cast<UsingDecl>(Y);
3093  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3094  UX->hasTypename() == UY->hasTypename() &&
3095  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3096  }
3097  if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3098  const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3099  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3100  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3101  }
3102  if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3103  return isSameQualifier(
3104  UX->getQualifier(),
3105  cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3106 
3107  // Namespace alias definitions with the same target match.
3108  if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3109  const auto *NAY = cast<NamespaceAliasDecl>(Y);
3110  return NAX->getNamespace()->Equals(NAY->getNamespace());
3111  }
3112 
3113  return false;
3114 }
3115 
3116 /// Find the context in which we should search for previous declarations when
3117 /// looking for declarations to merge.
3118 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3119  DeclContext *DC) {
3120  if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3121  return ND->getOriginalNamespace();
3122 
3123  if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3124  // Try to dig out the definition.
3125  auto *DD = RD->DefinitionData;
3126  if (!DD)
3127  DD = RD->getCanonicalDecl()->DefinitionData;
3128 
3129  // If there's no definition yet, then DC's definition is added by an update
3130  // record, but we've not yet loaded that update record. In this case, we
3131  // commit to DC being the canonical definition now, and will fix this when
3132  // we load the update record.
3133  if (!DD) {
3134  DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3135  RD->setCompleteDefinition(true);
3136  RD->DefinitionData = DD;
3137  RD->getCanonicalDecl()->DefinitionData = DD;
3138 
3139  // Track that we did this horrible thing so that we can fix it later.
3140  Reader.PendingFakeDefinitionData.insert(
3141  std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3142  }
3143 
3144  return DD->Definition;
3145  }
3146 
3147  if (auto *ED = dyn_cast<EnumDecl>(DC))
3148  return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3149  : nullptr;
3150 
3151  // We can see the TU here only if we have no Sema object. In that case,
3152  // there's no TU scope to look in, so using the DC alone is sufficient.
3153  if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3154  return TU;
3155 
3156  return nullptr;
3157 }
3158 
3159 ASTDeclReader::FindExistingResult::~FindExistingResult() {
3160  // Record that we had a typedef name for linkage whether or not we merge
3161  // with that declaration.
3162  if (TypedefNameForLinkage) {
3163  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3164  Reader.ImportedTypedefNamesForLinkage.insert(
3165  std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3166  return;
3167  }
3168 
3169  if (!AddResult || Existing)
3170  return;
3171 
3172  DeclarationName Name = New->getDeclName();
3173  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3175  setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3176  AnonymousDeclNumber, New);
3177  } else if (DC->isTranslationUnit() &&
3178  !Reader.getContext().getLangOpts().CPlusPlus) {
3179  if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3180  Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3181  .push_back(New);
3182  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3183  // Add the declaration to its redeclaration context so later merging
3184  // lookups will find it.
3185  MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3186  }
3187 }
3188 
3189 /// Find the declaration that should be merged into, given the declaration found
3190 /// by name lookup. If we're merging an anonymous declaration within a typedef,
3191 /// we need a matching typedef, and we merge with the type inside it.
3193  bool IsTypedefNameForLinkage) {
3194  if (!IsTypedefNameForLinkage)
3195  return Found;
3196 
3197  // If we found a typedef declaration that gives a name to some other
3198  // declaration, then we want that inner declaration. Declarations from
3199  // AST files are handled via ImportedTypedefNamesForLinkage.
3200  if (Found->isFromASTFile())
3201  return nullptr;
3202 
3203  if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3204  return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3205 
3206  return nullptr;
3207 }
3208 
3209 /// Find the declaration to use to populate the anonymous declaration table
3210 /// for the given lexical DeclContext. We only care about finding local
3211 /// definitions of the context; we'll merge imported ones as we go.
3212 DeclContext *
3213 ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3214  // For classes, we track the definition as we merge.
3215  if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3216  auto *DD = RD->getCanonicalDecl()->DefinitionData;
3217  return DD ? DD->Definition : nullptr;
3218  }
3219 
3220  // For anything else, walk its merged redeclarations looking for a definition.
3221  // Note that we can't just call getDefinition here because the redeclaration
3222  // chain isn't wired up.
3223  for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3224  if (auto *FD = dyn_cast<FunctionDecl>(D))
3225  if (FD->isThisDeclarationADefinition())
3226  return FD;
3227  if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3228  if (MD->isThisDeclarationADefinition())
3229  return MD;
3230  }
3231 
3232  // No merged definition yet.
3233  return nullptr;
3234 }
3235 
3236 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3237  DeclContext *DC,
3238  unsigned Index) {
3239  // If the lexical context has been merged, look into the now-canonical
3240  // definition.
3241  auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3242 
3243  // If we've seen this before, return the canonical declaration.
3244  auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3245  if (Index < Previous.size() && Previous[Index])
3246  return Previous[Index];
3247 
3248  // If this is the first time, but we have parsed a declaration of the context,
3249  // build the anonymous declaration list from the parsed declaration.
3250  auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3251  if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3252  numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3253  if (Previous.size() == Number)
3254  Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3255  else
3256  Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3257  });
3258  }
3259 
3260  return Index < Previous.size() ? Previous[Index] : nullptr;
3261 }
3262 
3263 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3264  DeclContext *DC, unsigned Index,
3265  NamedDecl *D) {
3266  auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3267 
3268  auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3269  if (Index >= Previous.size())
3270  Previous.resize(Index + 1);
3271  if (!Previous[Index])
3272  Previous[Index] = D;
3273 }
3274 
3275 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3276  DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3277  : D->getDeclName();
3278 
3279  if (!Name && !needsAnonymousDeclarationNumber(D)) {
3280  // Don't bother trying to find unnamed declarations that are in
3281  // unmergeable contexts.
3282  FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3283  AnonymousDeclNumber, TypedefNameForLinkage);
3284  Result.suppress();
3285  return Result;
3286  }
3287 
3289  if (TypedefNameForLinkage) {
3290  auto It = Reader.ImportedTypedefNamesForLinkage.find(
3291  std::make_pair(DC, TypedefNameForLinkage));
3292  if (It != Reader.ImportedTypedefNamesForLinkage.end())
3293  if (isSameEntity(It->second, D))
3294  return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3295  TypedefNameForLinkage);
3296  // Go on to check in other places in case an existing typedef name
3297  // was not imported.
3298  }
3299 
3301  // This is an anonymous declaration that we may need to merge. Look it up
3302  // in its context by number.
3303  if (auto *Existing = getAnonymousDeclForMerging(
3304  Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3305  if (isSameEntity(Existing, D))
3306  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3307  TypedefNameForLinkage);
3308  } else if (DC->isTranslationUnit() &&
3309  !Reader.getContext().getLangOpts().CPlusPlus) {
3310  IdentifierResolver &IdResolver = Reader.getIdResolver();
3311 
3312  // Temporarily consider the identifier to be up-to-date. We don't want to
3313  // cause additional lookups here.
3314  class UpToDateIdentifierRAII {
3315  IdentifierInfo *II;
3316  bool WasOutToDate = false;
3317 
3318  public:
3319  explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3320  if (II) {
3321  WasOutToDate = II->isOutOfDate();
3322  if (WasOutToDate)
3323  II->setOutOfDate(false);
3324  }
3325  }
3326 
3327  ~UpToDateIdentifierRAII() {
3328  if (WasOutToDate)
3329  II->setOutOfDate(true);
3330  }
3331  } UpToDate(Name.getAsIdentifierInfo());
3332 
3333  for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3334  IEnd = IdResolver.end();
3335  I != IEnd; ++I) {
3336  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3337  if (isSameEntity(Existing, D))
3338  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3339  TypedefNameForLinkage);
3340  }
3341  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3342  DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3343  for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3344  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3345  if (isSameEntity(Existing, D))
3346  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3347  TypedefNameForLinkage);
3348  }
3349  } else {
3350  // Not in a mergeable context.
3351  return FindExistingResult(Reader);
3352  }
3353 
3354  // If this declaration is from a merged context, make a note that we need to
3355  // check that the canonical definition of that context contains the decl.
3356  //
3357  // FIXME: We should do something similar if we merge two definitions of the
3358  // same template specialization into the same CXXRecordDecl.
3359  auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3360  if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3361  MergedDCIt->second == D->getDeclContext())
3362  Reader.PendingOdrMergeChecks.push_back(D);
3363 
3364  return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3365  AnonymousDeclNumber, TypedefNameForLinkage);
3366 }
3367 
3368 template<typename DeclT>
3370  return D->RedeclLink.getLatestNotUpdated();
3371 }
3372 
3374  llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3375 }
3376 
3378  assert(D);
3379 
3380  switch (D->getKind()) {
3381 #define ABSTRACT_DECL(TYPE)
3382 #define DECL(TYPE, BASE) \
3383  case Decl::TYPE: \
3384  return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3385 #include "clang/AST/DeclNodes.inc"
3386  }
3387  llvm_unreachable("unknown decl kind");
3388 }
3389 
3390 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3392 }
3393 
3394 template<typename DeclT>
3397  Decl *Previous, Decl *Canon) {
3398  D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3399  D->First = cast<DeclT>(Previous)->First;
3400 }
3401 
3402 namespace clang {
3403 
3404 template<>
3407  Decl *Previous, Decl *Canon) {
3408  auto *VD = static_cast<VarDecl *>(D);
3409  auto *PrevVD = cast<VarDecl>(Previous);
3410  D->RedeclLink.setPrevious(PrevVD);
3411  D->First = PrevVD->First;
3412 
3413  // We should keep at most one definition on the chain.
3414  // FIXME: Cache the definition once we've found it. Building a chain with
3415  // N definitions currently takes O(N^2) time here.
3416  if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3417  for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3418  if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3419  Reader.mergeDefinitionVisibility(CurD, VD);
3420  VD->demoteThisDefinitionToDeclaration();
3421  break;
3422  }
3423  }
3424  }
3425 }
3426 
3428  auto *DT = T->getContainedDeducedType();
3429  return DT && !DT->isDeduced();
3430 }
3431 
3432 template<>
3435  Decl *Previous, Decl *Canon) {
3436  auto *FD = static_cast<FunctionDecl *>(D);
3437  auto *PrevFD = cast<FunctionDecl>(Previous);
3438 
3439  FD->RedeclLink.setPrevious(PrevFD);
3440  FD->First = PrevFD->First;
3441 
3442  // If the previous declaration is an inline function declaration, then this
3443  // declaration is too.
3444  if (PrevFD->isInlined() != FD->isInlined()) {
3445  // FIXME: [dcl.fct.spec]p4:
3446  // If a function with external linkage is declared inline in one
3447  // translation unit, it shall be declared inline in all translation
3448  // units in which it appears.
3449  //
3450  // Be careful of this case:
3451  //
3452  // module A:
3453  // template<typename T> struct X { void f(); };
3454  // template<typename T> inline void X<T>::f() {}
3455  //
3456  // module B instantiates the declaration of X<int>::f
3457  // module C instantiates the definition of X<int>::f
3458  //
3459  // If module B and C are merged, we do not have a violation of this rule.
3460  FD->setImplicitlyInline(true);
3461  }
3462 
3463  auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3464  auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3465  if (FPT && PrevFPT) {
3466  // If we need to propagate an exception specification along the redecl
3467  // chain, make a note of that so that we can do so later.
3468  bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3469  bool WasUnresolved =
3471  if (IsUnresolved != WasUnresolved)
3472  Reader.PendingExceptionSpecUpdates.insert(
3473  {Canon, IsUnresolved ? PrevFD : FD});
3474 
3475  // If we need to propagate a deduced return type along the redecl chain,
3476  // make a note of that so that we can do it later.
3477  bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3478  bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3479  if (IsUndeduced != WasUndeduced)
3480  Reader.PendingDeducedTypeUpdates.insert(
3481  {cast<FunctionDecl>(Canon),
3482  (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3483  }
3484 }
3485 
3486 } // namespace clang
3487 
3489  llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3490 }
3491 
3492 /// Inherit the default template argument from \p From to \p To. Returns
3493 /// \c false if there is no default template for \p From.
3494 template <typename ParmDecl>
3495 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3496  Decl *ToD) {
3497  auto *To = cast<ParmDecl>(ToD);
3498  if (!From->hasDefaultArgument())
3499  return false;
3500  To->setInheritedDefaultArgument(Context, From);
3501  return true;
3502 }
3503 
3505  TemplateDecl *From,
3506  TemplateDecl *To) {
3507  auto *FromTP = From->getTemplateParameters();
3508  auto *ToTP = To->getTemplateParameters();
3509  assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3510 
3511  for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3512  NamedDecl *FromParam = FromTP->getParam(I);
3513  NamedDecl *ToParam = ToTP->getParam(I);
3514 
3515  if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3516  inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3517  else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3518  inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3519  else
3521  Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3522  }
3523 }
3524 
3526  Decl *Previous, Decl *Canon) {
3527  assert(D && Previous);
3528 
3529  switch (D->getKind()) {
3530 #define ABSTRACT_DECL(TYPE)
3531 #define DECL(TYPE, BASE) \
3532  case Decl::TYPE: \
3533  attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3534  break;
3535 #include "clang/AST/DeclNodes.inc"
3536  }
3537 
3538  // If the declaration was visible in one module, a redeclaration of it in
3539  // another module remains visible even if it wouldn't be visible by itself.
3540  //
3541  // FIXME: In this case, the declaration should only be visible if a module
3542  // that makes it visible has been imported.
3543  D->IdentifierNamespace |=
3544  Previous->IdentifierNamespace &
3546 
3547  // If the declaration declares a template, it may inherit default arguments
3548  // from the previous declaration.
3549  if (auto *TD = dyn_cast<TemplateDecl>(D))
3551  cast<TemplateDecl>(Previous), TD);
3552 }
3553 
3554 template<typename DeclT>
3556  D->RedeclLink.setLatest(cast<DeclT>(Latest));
3557 }
3558 
3560  llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3561 }
3562 
3564  assert(D && Latest);
3565 
3566  switch (D->getKind()) {
3567 #define ABSTRACT_DECL(TYPE)
3568 #define DECL(TYPE, BASE) \
3569  case Decl::TYPE: \
3570  attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3571  break;
3572 #include "clang/AST/DeclNodes.inc"
3573  }
3574 }
3575 
3576 template<typename DeclT>
3578  D->RedeclLink.markIncomplete();
3579 }
3580 
3582  llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3583 }
3584 
3585 void ASTReader::markIncompleteDeclChain(Decl *D) {
3586  switch (D->getKind()) {
3587 #define ABSTRACT_DECL(TYPE)
3588 #define DECL(TYPE, BASE) \
3589  case Decl::TYPE: \
3590  ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3591  break;
3592 #include "clang/AST/DeclNodes.inc"
3593  }
3594 }
3595 
3596 /// Read the declaration at the given offset from the AST file.
3597 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3598  unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3599  SourceLocation DeclLoc;
3600  RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3601  llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3602  // Keep track of where we are in the stream, then jump back there
3603  // after reading this declaration.
3604  SavedStreamPosition SavedPosition(DeclsCursor);
3605 
3606  ReadingKindTracker ReadingKind(Read_Decl, *this);
3607 
3608  // Note that we are loading a declaration record.
3609  Deserializing ADecl(this);
3610 
3611  DeclsCursor.JumpToBit(Loc.Offset);
3612  ASTRecordReader Record(*this, *Loc.F);
3613  ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3614  unsigned Code = DeclsCursor.ReadCode();
3615 
3616  ASTContext &Context = getContext();
3617  Decl *D = nullptr;
3618  switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3619  case DECL_CONTEXT_LEXICAL:
3620  case DECL_CONTEXT_VISIBLE:
3621  llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3622  case DECL_TYPEDEF:
3623  D = TypedefDecl::CreateDeserialized(Context, ID);
3624  break;
3625  case DECL_TYPEALIAS:
3626  D = TypeAliasDecl::CreateDeserialized(Context, ID);
3627  break;
3628  case DECL_ENUM:
3629  D = EnumDecl::CreateDeserialized(Context, ID);
3630  break;
3631  case DECL_RECORD:
3632  D = RecordDecl::CreateDeserialized(Context, ID);
3633  break;
3634  case DECL_ENUM_CONSTANT:
3635  D = EnumConstantDecl::CreateDeserialized(Context, ID);
3636  break;
3637  case DECL_FUNCTION:
3638  D = FunctionDecl::CreateDeserialized(Context, ID);
3639  break;
3640  case DECL_LINKAGE_SPEC:
3641  D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3642  break;
3643  case DECL_EXPORT:
3644  D = ExportDecl::CreateDeserialized(Context, ID);
3645  break;
3646  case DECL_LABEL:
3647  D = LabelDecl::CreateDeserialized(Context, ID);
3648  break;
3649  case DECL_NAMESPACE:
3650  D = NamespaceDecl::CreateDeserialized(Context, ID);
3651  break;
3652  case DECL_NAMESPACE_ALIAS:
3653  D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3654  break;
3655  case DECL_USING:
3656  D = UsingDecl::CreateDeserialized(Context, ID);
3657  break;
3658  case DECL_USING_PACK:
3659  D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3660  break;
3661  case DECL_USING_SHADOW:
3662  D = UsingShadowDecl::CreateDeserialized(Context, ID);
3663  break;
3666  break;
3667  case DECL_USING_DIRECTIVE:
3668  D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3669  break;
3672  break;
3675  break;
3676  case DECL_CXX_RECORD:
3677  D = CXXRecordDecl::CreateDeserialized(Context, ID);
3678  break;
3681  break;
3682  case DECL_CXX_METHOD:
3683  D = CXXMethodDecl::CreateDeserialized(Context, ID);
3684  break;
3685  case DECL_CXX_CONSTRUCTOR:
3686  D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3687  break;
3689  D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3690  break;
3691  case DECL_CXX_DESTRUCTOR:
3692  D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3693  break;
3694  case DECL_CXX_CONVERSION:
3695  D = CXXConversionDecl::CreateDeserialized(Context, ID);
3696  break;
3697  case DECL_ACCESS_SPEC:
3698  D = AccessSpecDecl::CreateDeserialized(Context, ID);
3699  break;
3700  case DECL_FRIEND:
3701  D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3702  break;
3703  case DECL_FRIEND_TEMPLATE:
3704  D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3705  break;
3706  case DECL_CLASS_TEMPLATE:
3707  D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3708  break;
3711  break;
3714  break;
3715  case DECL_VAR_TEMPLATE:
3716  D = VarTemplateDecl::CreateDeserialized(Context, ID);
3717  break;
3720  break;
3723  break;
3726  break;
3729  break;
3732  break;
3735  break;
3738  Record.readInt());
3739  break;
3742  break;
3745  Record.readInt());
3746  break;
3749  break;
3750  case DECL_STATIC_ASSERT:
3751  D = StaticAssertDecl::CreateDeserialized(Context, ID);
3752  break;
3753  case DECL_OBJC_METHOD:
3754  D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3755  break;
3756  case DECL_OBJC_INTERFACE:
3757  D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3758  break;
3759  case DECL_OBJC_IVAR:
3760  D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3761  break;
3762  case DECL_OBJC_PROTOCOL:
3763  D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3764  break;
3766  D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3767  break;
3768  case DECL_OBJC_CATEGORY:
3769  D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3770  break;
3773  break;
3776  break;
3779  break;
3780  case DECL_OBJC_PROPERTY:
3781  D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3782  break;
3785  break;
3786  case DECL_FIELD:
3787  D = FieldDecl::CreateDeserialized(Context, ID);
3788  break;
3789  case DECL_INDIRECTFIELD:
3790  D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3791  break;
3792  case DECL_VAR:
3793  D = VarDecl::CreateDeserialized(Context, ID);
3794  break;
3795  case DECL_IMPLICIT_PARAM:
3796  D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3797  break;
3798  case DECL_PARM_VAR:
3799  D = ParmVarDecl::CreateDeserialized(Context, ID);
3800  break;
3801  case DECL_DECOMPOSITION:
3802  D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3803  break;
3804  case DECL_BINDING:
3805  D = BindingDecl::CreateDeserialized(Context, ID);
3806  break;
3807  case DECL_FILE_SCOPE_ASM:
3808  D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3809  break;
3810  case DECL_BLOCK:
3811  D = BlockDecl::CreateDeserialized(Context, ID);
3812  break;
3813  case DECL_MS_PROPERTY:
3814  D = MSPropertyDecl::CreateDeserialized(Context, ID);
3815  break;
3816  case DECL_CAPTURED:
3817  D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3818  break;
3820  Error("attempt to read a C++ base-specifier record as a declaration");
3821  return nullptr;
3823  Error("attempt to read a C++ ctor initializer record as a declaration");
3824  return nullptr;
3825  case DECL_IMPORT:
3826  // Note: last entry of the ImportDecl record is the number of stored source
3827  // locations.
3828  D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3829  break;
3831  D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3832  break;
3835  break;
3836  case DECL_OMP_CAPTUREDEXPR:
3837  D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3838  break;
3839  case DECL_PRAGMA_COMMENT:
3840  D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3841  break;
3844  Record.readInt());
3845  break;
3846  case DECL_EMPTY:
3847  D = EmptyDecl::CreateDeserialized(Context, ID);
3848  break;
3849  case DECL_OBJC_TYPE_PARAM:
3850  D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3851  break;
3852  }
3853 
3854  assert(D && "Unknown declaration reading AST file");
3855  LoadedDecl(Index, D);
3856  // Set the DeclContext before doing any deserialization, to make sure internal
3857  // calls to Decl::getASTContext() by Decl's methods will find the
3858  // TranslationUnitDecl without crashing.
3859  D->setDeclContext(Context.getTranslationUnitDecl());
3860  Reader.Visit(D);
3861 
3862  // If this declaration is also a declaration context, get the
3863  // offsets for its tables of lexical and visible declarations.
3864  if (auto *DC = dyn_cast<DeclContext>(D)) {
3865  std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3866  if (Offsets.first &&
3867  ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3868  return nullptr;
3869  if (Offsets.second &&
3870  ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3871  return nullptr;
3872  }
3873  assert(Record.getIdx() == Record.size());
3874 
3875  // Load any relevant update records.
3876  PendingUpdateRecords.push_back(
3877  PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3878 
3879  // Load the categories after recursive loading is finished.
3880  if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3881  // If we already have a definition when deserializing the ObjCInterfaceDecl,
3882  // we put the Decl in PendingDefinitions so we can pull the categories here.
3883  if (Class->isThisDeclarationADefinition() ||
3884  PendingDefinitions.count(Class))
3885  loadObjCCategories(ID, Class);
3886 
3887  // If we have deserialized a declaration that has a definition the
3888  // AST consumer might need to know about, queue it.
3889  // We don't pass it to the consumer immediately because we may be in recursive
3890  // loading, and some declarations may still be initializing.
3891  PotentiallyInterestingDecls.push_back(
3892  InterestingDecl(D, Reader.hasPendingBody()));
3893 
3894  return D;
3895 }
3896 
3897 void ASTReader::PassInterestingDeclsToConsumer() {
3898  assert(Consumer);
3899 
3900  if (PassingDeclsToConsumer)
3901  return;
3902 
3903  // Guard variable to avoid recursively redoing the process of passing
3904  // decls to consumer.
3905  SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3906  true);
3907 
3908  // Ensure that we've loaded all potentially-interesting declarations
3909  // that need to be eagerly loaded.
3910  for (auto ID : EagerlyDeserializedDecls)
3911  GetDecl(ID);
3912  EagerlyDeserializedDecls.clear();
3913 
3914  while (!PotentiallyInterestingDecls.empty()) {
3915  InterestingDecl D = PotentiallyInterestingDecls.front();
3916  PotentiallyInterestingDecls.pop_front();
3917  if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3918  PassInterestingDeclToConsumer(D.getDecl());
3919  }
3920 }
3921 
3922 void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3923  // The declaration may have been modified by files later in the chain.
3924  // If this is the case, read the record containing the updates from each file
3925  // and pass it to ASTDeclReader to make the modifications.
3926  serialization::GlobalDeclID ID = Record.ID;
3927  Decl *D = Record.D;
3928  ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3929  DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3930 
3931  SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3932 
3933  if (UpdI != DeclUpdateOffsets.end()) {
3934  auto UpdateOffsets = std::move(UpdI->second);
3935  DeclUpdateOffsets.erase(UpdI);
3936 
3937  // Check if this decl was interesting to the consumer. If we just loaded
3938  // the declaration, then we know it was interesting and we skip the call
3939  // to isConsumerInterestedIn because it is unsafe to call in the
3940  // current ASTReader state.
3941  bool WasInteresting =
3942  Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
3943  for (auto &FileAndOffset : UpdateOffsets) {
3944  ModuleFile *F = FileAndOffset.first;
3945  uint64_t Offset = FileAndOffset.second;
3946  llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3947  SavedStreamPosition SavedPosition(Cursor);
3948  Cursor.JumpToBit(Offset);
3949  unsigned Code = Cursor.ReadCode();
3950  ASTRecordReader Record(*this, *F);
3951  unsigned RecCode = Record.readRecord(Cursor, Code);
3952  (void)RecCode;
3953  assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3954 
3955  ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
3956  SourceLocation());
3957  Reader.UpdateDecl(D, PendingLazySpecializationIDs);
3958 
3959  // We might have made this declaration interesting. If so, remember that
3960  // we need to hand it off to the consumer.
3961  if (!WasInteresting &&
3962  isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
3963  PotentiallyInterestingDecls.push_back(
3964  InterestingDecl(D, Reader.hasPendingBody()));
3965  WasInteresting = true;
3966  }
3967  }
3968  }
3969  // Add the lazy specializations to the template.
3970  assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||
3971  isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&
3972  "Must not have pending specializations");
3973  if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
3974  ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
3975  else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
3976  ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
3977  else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
3978  ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
3979  PendingLazySpecializationIDs.clear();
3980 
3981  // Load the pending visible updates for this decl context, if it has any.
3982  auto I = PendingVisibleUpdates.find(ID);
3983  if (I != PendingVisibleUpdates.end()) {
3984  auto VisibleUpdates = std::move(I->second);
3985  PendingVisibleUpdates.erase(I);
3986 
3987  auto *DC = cast<DeclContext>(D)->getPrimaryContext();
3988  for (const auto &Update : VisibleUpdates)
3989  Lookups[DC].Table.add(
3990  Update.Mod, Update.Data,
3992  DC->setHasExternalVisibleStorage(true);
3993  }
3994 }
3995 
3996 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
3997  // Attach FirstLocal to the end of the decl chain.
3998  Decl *CanonDecl = FirstLocal->getCanonicalDecl();
3999  if (FirstLocal != CanonDecl) {
4000  Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4002  *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4003  CanonDecl);
4004  }
4005 
4006  if (!LocalOffset) {
4007  ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4008  return;
4009  }
4010 
4011  // Load the list of other redeclarations from this module file.
4012  ModuleFile *M = getOwningModuleFile(FirstLocal);
4013  assert(M && "imported decl from no module file");
4014 
4015  llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4016  SavedStreamPosition SavedPosition(Cursor);
4017  Cursor.JumpToBit(LocalOffset);
4018 
4019  RecordData Record;
4020  unsigned Code = Cursor.ReadCode();
4021  unsigned RecCode = Cursor.readRecord(Code, Record);
4022  (void)RecCode;
4023  assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
4024 
4025  // FIXME: We have several different dispatches on decl kind here; maybe
4026  // we should instead generate one loop per kind and dispatch up-front?
4027  Decl *MostRecent = FirstLocal;
4028  for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4029  auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4030  ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4031  MostRecent = D;
4032  }
4033  ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4034 }
4035 
4036 namespace {
4037 
4038  /// Given an ObjC interface, goes through the modules and links to the
4039  /// interface all the categories for it.
4040  class ObjCCategoriesVisitor {
4041  ASTReader &Reader;
4042  ObjCInterfaceDecl *Interface;
4043  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4044  ObjCCategoryDecl *Tail = nullptr;
4045  llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4046  serialization::GlobalDeclID InterfaceID;
4047  unsigned PreviousGeneration;
4048 
4049  void add(ObjCCategoryDecl *Cat) {
4050  // Only process each category once.
4051  if (!Deserialized.erase(Cat))
4052  return;
4053 
4054  // Check for duplicate categories.
4055  if (Cat->getDeclName()) {
4056  ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4057  if (Existing &&
4058  Reader.getOwningModuleFile(Existing)
4059  != Reader.getOwningModuleFile(Cat)) {
4060  // FIXME: We should not warn for duplicates in diamond:
4061  //
4062  // MT //
4063  // / \ //
4064  // ML MR //
4065  // \ / //
4066  // MB //
4067  //
4068  // If there are duplicates in ML/MR, there will be warning when
4069  // creating MB *and* when importing MB. We should not warn when
4070  // importing.
4071  Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4072  << Interface->getDeclName() << Cat->getDeclName();
4073  Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4074  } else if (!Existing) {
4075  // Record this category.
4076  Existing = Cat;
4077  }
4078  }
4079 
4080  // Add this category to the end of the chain.
4081  if (Tail)
4083  else
4084  Interface->setCategoryListRaw(Cat);
4085  Tail = Cat;
4086  }
4087 
4088  public:
4089  ObjCCategoriesVisitor(ASTReader &Reader,
4090  ObjCInterfaceDecl *Interface,
4091  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4092  serialization::GlobalDeclID InterfaceID,
4093  unsigned PreviousGeneration)
4094  : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4095  InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4096  // Populate the name -> category map with the set of known categories.
4097  for (auto *Cat : Interface->known_categories()) {
4098  if (Cat->getDeclName())
4099  NameCategoryMap[Cat->getDeclName()] = Cat;
4100 
4101  // Keep track of the tail of the category list.
4102  Tail = Cat;
4103  }
4104  }
4105 
4106  bool operator()(ModuleFile &M) {
4107  // If we've loaded all of the category information we care about from
4108  // this module file, we're done.
4109  if (M.Generation <= PreviousGeneration)
4110  return true;
4111 
4112  // Map global ID of the definition down to the local ID used in this
4113  // module file. If there is no such mapping, we'll find nothing here
4114  // (or in any module it imports).
4115  DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4116  if (!LocalID)
4117  return true;
4118 
4119  // Perform a binary search to find the local redeclarations for this
4120  // declaration (if any).
4121  const ObjCCategoriesInfo Compare = { LocalID, 0 };
4122  const ObjCCategoriesInfo *Result
4123  = std::lower_bound(M.ObjCCategoriesMap,
4125  Compare);
4126  if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4127  Result->DefinitionID != LocalID) {
4128  // We didn't find anything. If the class definition is in this module
4129  // file, then the module files it depends on cannot have any categories,
4130  // so suppress further lookup.
4131  return Reader.isDeclIDFromModule(InterfaceID, M);
4132  }
4133 
4134  // We found something. Dig out all of the categories.
4135  unsigned Offset = Result->Offset;
4136  unsigned N = M.ObjCCategories[Offset];
4137  M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4138  for (unsigned I = 0; I != N; ++I)
4139  add(cast_or_null<ObjCCategoryDecl>(
4140  Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4141  return true;
4142  }
4143  };
4144 
4145 } // namespace
4146 
4147 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4148  ObjCInterfaceDecl *D,
4149  unsigned PreviousGeneration) {
4150  ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4151  PreviousGeneration);
4152  ModuleMgr.visit(Visitor);
4153 }
4154 
4155 template<typename DeclT, typename Fn>
4156 static void forAllLaterRedecls(DeclT *D, Fn F) {
4157  F(D);
4158 
4159  // Check whether we've already merged D into its redeclaration chain.
4160  // MostRecent may or may not be nullptr if D has not been merged. If
4161  // not, walk the merged redecl chain and see if it's there.
4162  auto *MostRecent = D->getMostRecentDecl();
4163  bool Found = false;
4164  for (auto *Redecl = MostRecent; Redecl && !Found;
4165  Redecl = Redecl->getPreviousDecl())
4166  Found = (Redecl == D);
4167 
4168  // If this declaration is merged, apply the functor to all later decls.
4169  if (Found) {
4170  for (auto *Redecl = MostRecent; Redecl != D;
4171  Redecl = Redecl->getPreviousDecl())
4172  F(Redecl);
4173  }
4174 }
4175 
4177  llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4178  while (Record.getIdx() < Record.size()) {
4179  switch ((DeclUpdateKind)Record.readInt()) {
4181  auto *RD = cast<CXXRecordDecl>(D);
4182  // FIXME: If we also have an update record for instantiating the
4183  // definition of D, we need that to happen before we get here.
4184  Decl *MD = Record.readDecl();
4185  assert(MD && "couldn't read decl from update record");
4186  // FIXME: We should call addHiddenDecl instead, to add the member
4187  // to its DeclContext.
4188  RD->addedMember(MD);
4189  break;
4190  }
4191 
4193  // It will be added to the template's lazy specialization set.
4194  PendingLazySpecializationIDs.push_back(ReadDeclID());
4195  break;
4196 
4198  auto *Anon = ReadDeclAs<NamespaceDecl>();
4199 
4200  // Each module has its own anonymous namespace, which is disjoint from
4201  // any other module's anonymous namespaces, so don't attach the anonymous
4202  // namespace at all.
4203  if (!Record.isModule()) {
4204  if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4205  TU->setAnonymousNamespace(Anon);
4206  else
4207  cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4208  }
4209  break;
4210  }
4211 
4213  auto *VD = cast<VarDecl>(D);
4214  VD->NonParmVarDeclBits.IsInline = Record.readInt();
4215  VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4216  uint64_t Val = Record.readInt();
4217  if (Val && !VD->getInit()) {
4218  VD->setInit(Record.readExpr());
4219  if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4220  EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4221  Eval->CheckedICE = true;
4222  Eval->IsICE = Val == 3;
4223  }
4224  }
4225  break;
4226  }
4227 
4229  SourceLocation POI = Record.readSourceLocation();
4230  if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4231  VTSD->setPointOfInstantiation(POI);
4232  } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4233  VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4234  } else {
4235  auto *FD = cast<FunctionDecl>(D);
4236  if (auto *FTSInfo = FD->TemplateOrSpecialization
4237  .dyn_cast<FunctionTemplateSpecializationInfo *>())
4238  FTSInfo->setPointOfInstantiation(POI);
4239  else
4240  FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4241  ->setPointOfInstantiation(POI);
4242  }
4243  break;
4244  }
4245 
4247  auto *Param = cast<ParmVarDecl>(D);
4248 
4249  // We have to read the default argument regardless of whether we use it
4250  // so that hypothetical further update records aren't messed up.
4251  // TODO: Add a function to skip over the next expr record.
4252  auto *DefaultArg = Record.readExpr();
4253 
4254  // Only apply the update if the parameter still has an uninstantiated
4255  // default argument.
4256  if (Param->hasUninstantiatedDefaultArg())
4257  Param->setDefaultArg(DefaultArg);
4258  break;
4259  }
4260 
4262  auto *FD = cast<FieldDecl>(D);
4263  auto *DefaultInit = Record.readExpr();
4264 
4265  // Only apply the update if the field still has an uninstantiated
4266  // default member initializer.
4267  if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4268  if (DefaultInit)
4269  FD->setInClassInitializer(DefaultInit);
4270  else
4271  // Instantiation failed. We can get here if we serialized an AST for
4272  // an invalid program.
4273  FD->removeInClassInitializer();
4274  }
4275  break;
4276  }
4277 
4279  auto *FD = cast<FunctionDecl>(D);
4280  if (Reader.PendingBodies[FD]) {
4281  // FIXME: Maybe check for ODR violations.
4282  // It's safe to stop now because this update record is always last.
4283  return;
4284  }
4285 
4286  if (Record.readInt()) {
4287  // Maintain AST consistency: any later redeclarations of this function
4288  // are inline if this one is. (We might have merged another declaration
4289  // into this one.)
4290  forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4291  FD->setImplicitlyInline();
4292  });
4293  }
4294  FD->setInnerLocStart(ReadSourceLocation());
4295  ReadFunctionDefinition(FD);
4296  assert(Record.getIdx() == Record.size() && "lazy body must be last");
4297  break;
4298  }
4299 
4301  auto *RD = cast<CXXRecordDecl>(D);
4302  auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4303  bool HadRealDefinition =
4304  OldDD && (OldDD->Definition != RD ||
4305  !Reader.PendingFakeDefinitionData.count(OldDD));
4306  RD->setParamDestroyedInCallee(Record.readInt());
4307  RD->setArgPassingRestrictions(
4308  (RecordDecl::ArgPassingKind)Record.readInt());
4309  ReadCXXRecordDefinition(RD, /*Update*/true);
4310 
4311  // Visible update is handled separately.
4312  uint64_t LexicalOffset = ReadLocalOffset();
4313  if (!HadRealDefinition && LexicalOffset) {
4314  Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4315  Reader.PendingFakeDefinitionData.erase(OldDD);
4316  }
4317 
4318  auto TSK = (TemplateSpecializationKind)Record.readInt();
4319  SourceLocation POI = ReadSourceLocation();
4320  if (MemberSpecializationInfo *MSInfo =
4321  RD->getMemberSpecializationInfo()) {
4322  MSInfo->setTemplateSpecializationKind(TSK);
4323  MSInfo->setPointOfInstantiation(POI);
4324  } else {
4325  auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4326  Spec->setTemplateSpecializationKind(TSK);
4327  Spec->setPointOfInstantiation(POI);
4328 
4329  if (Record.readInt()) {
4330  auto *PartialSpec =
4331  ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4333  Record.readTemplateArgumentList(TemplArgs);
4334  auto *TemplArgList = TemplateArgumentList::CreateCopy(
4335  Reader.getContext(), TemplArgs);
4336 
4337  // FIXME: If we already have a partial specialization set,
4338  // check that it matches.
4339  if (!Spec->getSpecializedTemplateOrPartial()
4341  Spec->setInstantiationOf(PartialSpec, TemplArgList);
4342  }
4343  }
4344 
4345  RD->setTagKind((TagTypeKind)Record.readInt());
4346  RD->setLocation(ReadSourceLocation());
4347  RD->setLocStart(ReadSourceLocation());
4348  RD->setBraceRange(ReadSourceRange());
4349 
4350  if (Record.readInt()) {
4351  AttrVec Attrs;
4352  Record.readAttributes(Attrs);
4353  // If the declaration already has attributes, we assume that some other
4354  // AST file already loaded them.
4355  if (!D->hasAttrs())
4356  D->setAttrsImpl(Attrs, Reader.getContext());
4357  }
4358  break;
4359  }
4360 
4362  // Set the 'operator delete' directly to avoid emitting another update
4363  // record.
4364  auto *Del = ReadDeclAs<FunctionDecl>();
4365  auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4366  auto *ThisArg = Record.readExpr();
4367  // FIXME: Check consistency if we have an old and new operator delete.
4368  if (!First->OperatorDelete) {
4369  First->OperatorDelete = Del;
4370  First->OperatorDeleteThisArg = ThisArg;
4371  }
4372  break;
4373  }
4374 
4377  SmallVector<QualType, 8> ExceptionStorage;
4378  Record.readExceptionSpec(ExceptionStorage, ESI);
4379 
4380  // Update this declaration's exception specification, if needed.
4381  auto *FD = cast<FunctionDecl>(D);
4382  auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4383  // FIXME: If the exception specification is already present, check that it
4384  // matches.
4385  if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4386  FD->setType(Reader.getContext().getFunctionType(
4387  FPT->getReturnType(), FPT->getParamTypes(),
4388  FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4389 
4390  // When we get to the end of deserializing, see if there are other decls
4391  // that we need to propagate this exception specification onto.
4392  Reader.PendingExceptionSpecUpdates.insert(
4393  std::make_pair(FD->getCanonicalDecl(), FD));
4394  }
4395  break;
4396  }
4397 
4399  auto *FD = cast<FunctionDecl>(D);
4400  QualType DeducedResultType = Record.readType();
4401  Reader.PendingDeducedTypeUpdates.insert(
4402  {FD->getCanonicalDecl(), DeducedResultType});
4403  break;
4404  }
4405 
4406  case UPD_DECL_MARKED_USED:
4407  // Maintain AST consistency: any later redeclarations are used too.
4408  D->markUsed(Reader.getContext());
4409  break;
4410 
4411  case UPD_MANGLING_NUMBER:
4412  Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4413  Record.readInt());
4414  break;
4415 
4417  Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4418  Record.readInt());
4419  break;
4420 
4422  D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4423  ReadSourceRange()));
4424  break;
4425 
4426  case UPD_DECL_EXPORTED: {
4427  unsigned SubmoduleID = readSubmoduleID();
4428  auto *Exported = cast<NamedDecl>(D);
4429  Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4430  Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4431  Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4432  break;
4433  }
4434 
4436  D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4437  Reader.getContext(),
4438  static_cast<OMPDeclareTargetDeclAttr::MapTypeTy>(Record.readInt()),
4439  ReadSourceRange()));
4440  break;
4441 
4443  AttrVec Attrs;
4444  Record.readAttributes(Attrs);
4445  assert(Attrs.size() == 1);
4446  D->addAttr(Attrs[0]);
4447  break;
4448  }
4449  }
4450 }
const uint64_t & readInt()
Returns the current value in this record, and advances to the next value.
Definition: ASTReader.h:2401
RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD)
void VisitTypeDecl(TypeDecl *TD)
void setCategoryNameLoc(SourceLocation Loc)
Definition: DeclObjC.h:2406
A FriendTemplateDecl record.
Definition: ASTBitCodes.h:1454
void setHasSkippedBody(bool Skipped=true)
Definition: Decl.h:2195
Defines the clang::ASTContext interface.
A NonTypeTemplateParmDecl record.
Definition: ASTBitCodes.h:1481
static bool isUndeducedReturnType(QualType T)
void setScopeInfo(unsigned scopeDepth, unsigned parameterIndex)
Definition: Decl.h:1569
Decl * GetLocalDecl(ModuleFile &F, uint32_t LocalID)
Reads a declaration with the given local ID in the given module.
Definition: ASTReader.h:1842
SourceLocation readSourceLocation()
Read a source location, advancing Idx.
Definition: ASTReader.h:2598
void VisitClassScopeFunctionSpecializationDecl(ClassScopeFunctionSpecializationDecl *D)
static const Decl * getCanonicalDecl(const Decl *D)
void setImplicit(bool I=true)
Definition: DeclBase.h:554
Represents a function declaration or definition.
Definition: Decl.h:1717
void setInitializerData(Expr *OrigE, Expr *PrivE)
Set initializer Orig and Priv vars.
Definition: DeclOpenMP.h:188
void setNonTrivialToPrimitiveDestroy(bool V)
Definition: Decl.h:3689
void VisitVarDecl(VarDecl *VD)
#define MATCH_FIELD(Field)
void setAnonymousStructOrUnion(bool Anon)
Definition: Decl.h:3647
A class which contains all the information about a particular captured value.
Definition: Decl.h:3841
static ImportDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumLocations)
Create a new, deserialized module import declaration.
Definition: Decl.cpp:4651
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
void VisitImportDecl(ImportDecl *D)
A (possibly-)qualified type.
Definition: Type.h:642
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:1784
FunctionDecl * Function
The function template specialization that this structure describes.
Definition: DeclTemplate.h:530
Static storage duration.
Definition: Specifiers.h:280
void setDefaultArgument(TypeSourceInfo *DefArg)
Set the default argument for this template parameter.
void setCompleteDefinition(bool V=true)
True if this decl has its body fully specified.
Definition: Decl.h:3149
void VisitUsingDecl(UsingDecl *D)
static UnresolvedUsingValueDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2762
static VarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:1915
void setLParenLoc(SourceLocation L)
Definition: DeclObjC.h:817
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:1517
void setNonTrivialToPrimitiveDefaultInitialize(bool V)
Definition: Decl.h:3673
void VisitObjCIvarDecl(ObjCIvarDecl *D)
#define OR_FIELD(Field)
void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D)
void setExplicitSpecified(bool ExpSpec=true)
State that this function is marked as explicit explicitly.
Definition: Decl.h:2341
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3329
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:2763
void setEmbeddedInDeclarator(bool isInDeclarator)
True if this tag declaration is "embedded" (i.e., defined or declared for the very first time) in the...
Definition: Decl.h:3176
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:175
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:2995
C Language Family Type Representation.
void setParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4064
Microsoft&#39;s &#39;__super&#39; specifier, stored as a CXXRecordDecl* of the class it appeared in...
An OMPDeclareReductionDecl record.
Definition: ASTBitCodes.h:1535
void VisitEnumConstantDecl(EnumConstantDecl *ECD)
static PragmaCommentDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned ArgSize)
Definition: Decl.cpp:4305
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:8458
Defines the clang::Module class, which describes a module in the source code.
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
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:1472
void setArgPassingRestrictions(ArgPassingKind Kind)
Definition: Decl.h:3704
Selector getObjCSelector() const
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
void setPure(bool P=true)
Definition: Decl.cpp:2726
static Decl * getMostRecentDecl(Decl *D)
known_categories_range known_categories() const
Definition: DeclObjC.h:1679
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:1379
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:4228
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:4243
unsigned LocalNumObjCCategoriesInMap
The number of redeclaration info entries in ObjCCategoriesMap.
Definition: Module.h:439
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:2786
Declaration of a variable template.
Represent a C++ namespace.
Definition: Decl.h:514
A ObjCPropertyDecl record.
Definition: ASTBitCodes.h:1336
void setPropertyImplementation(PropertyControl pc)
Definition: DeclObjC.h:921
bool hasRedeclaration() const
True if redeclared in the same interface.
Definition: DeclObjC.h:272
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:98
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:185
void readQualifierInfo(QualifierInfo &Info)
Definition: ASTReader.h:2544
void setPropertyAccessor(bool isAccessor)
Definition: DeclObjC.h:428
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:2480
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:4438
QualType getElementType() const
Definition: Type.h:2821
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3146
Represents a #pragma comment line.
Definition: Decl.h:139
A ClassTemplateDecl record.
Definition: ASTBitCodes.h:1457
void VisitStaticAssertDecl(StaticAssertDecl *D)
A PragmaDetectMismatchDecl record.
Definition: ASTBitCodes.h:1532
An UnresolvedUsingTypenameDecl record.
Definition: ASTBitCodes.h:1418
An identifier, stored as an IdentifierInfo*.
void setNothrow(bool Nothrow=true)
Definition: Decl.cpp:4448
void setRAngleLoc(SourceLocation Loc)
Definition: TemplateBase.h:572
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
unsigned getODRHash()
Definition: Decl.cpp:4052
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:1526
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6590
A UsingShadowDecl record.
Definition: ASTBitCodes.h:1406
const unsigned int NUM_PREDEF_DECL_IDS
The number of declaration IDs that are predefined.
Definition: ASTBitCodes.h:1273
The "__interface" keyword.
Definition: Type.h:4917
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:1507
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:475
void setSelfDecl(ImplicitParamDecl *SD)
Definition: DeclObjC.h:407
void VisitTypeAliasDecl(TypeAliasDecl *TD)
SpecifierKind getKind() const
Determine what kind of nested name specifier is stored.
void setCombinerData(Expr *InE, Expr *OutE)
Set combiner In and Out vars.
Definition: DeclOpenMP.h:163
A TemplateTemplateParmDecl record.
Definition: ASTBitCodes.h:1484
Represents a parameter to a function.
Definition: Decl.h:1536
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:1312
Module * getSubmodule(serialization::SubmoduleID GlobalID)
Retrieve the submodule that corresponds to a global submodule ID.
Definition: ASTReader.h:2416
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:131
A CXXConstructorDecl record for an inherited constructor.
Definition: ASTBitCodes.h:1439
Represents a struct/union/class.
Definition: Decl.h:3570
Description of a constructor that was inherited from a base class.
Definition: DeclCXX.h:2454
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:85
ObjCProtocolDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this Objective-C protocol.
Definition: DeclObjC.h:2242
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:3466
T * readDeclAs()
Reads a declaration from the given position in the record, advancing Idx.
Definition: ASTReader.h:2520
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 setUninstantiatedDefaultArg(Expr *arg)
Definition: Decl.cpp:2592
static IndirectFieldDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4484
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:154
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1192
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:2861
LambdaCaptureKind
The different capture forms in a lambda introducer.
Definition: Lambda.h:34
Represents a member of a struct/union/class.
Definition: Decl.h:2556
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:779
ArgPassingKind
Enum that represents the different ways arguments are passed to and returned from function calls...
Definition: Decl.h:3579
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:2129
Helper class that saves the current stream position and then restores it when destroyed.
Definition: ASTReader.h:2664
static NamespaceDecl * getNamespace(const NestedNameSpecifier *X)
void setOwningModuleID(unsigned ID)
Set the owning module ID.
Definition: DeclBase.h:629
void setStaticLocalNumber(const VarDecl *VD, unsigned Number)
void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD)
This declaration is definitely a definition.
Definition: Decl.h:1150
unsigned FromASTFile
Whether this declaration was loaded from an AST file.
Definition: DeclBase.h:324
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
Represents an access specifier followed by colon &#39;:&#39;.
Definition: DeclCXX.h:132
void setReturnType(QualType T)
Definition: DeclObjC.h:324
Declaration of a function specialization at template class scope.
static StaticAssertDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2810
TypeSourceInfo * getTypeSourceInfo()
Reads a declarator info from the given record, advancing Idx.
Definition: ASTReader.h:2482
void VisitLabelDecl(LabelDecl *LD)
static NamespaceDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2559
void setDeclImplementation(ImplementationControl ic)
Definition: DeclObjC.h:470
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:1499
size_t size() const
The length of this record.
Definition: ASTReader.h:2391
static OMPCapturedExprDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclOpenMP.cpp:107
iterator end()
end - Returns an iterator that has &#39;finished&#39;.
static VersionTuple ReadVersionTuple(const RecordData &Record, unsigned &Idx)
Read a version tuple.
Definition: ASTReader.cpp:9093
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:3348
void setUsingLoc(SourceLocation L)
Set the source location of the &#39;using&#39; keyword.
Definition: DeclCXX.h:3384
void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D)
IdentifierInfo * getAsIdentifier() const
Retrieve the identifier stored in this nested name specifier.
SelectorLocationsKind
Whether all locations of the selector identifiers are in a "standard" position.
static llvm::iterator_range< MergedRedeclIterator< DeclT > > merged_redecls(DeclT *D)
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:961
void setAccessControl(AccessControl ac)
Definition: DeclObjC.h:1974
static void attachLatestDecl(Decl *D, Decl *latest)
TypeSourceInfo * GetTypeSourceInfo(ModuleFile &F, const RecordData &Record, unsigned &Idx)
Reads a declarator info from the given record.
Definition: ASTReader.cpp:6762
< 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:186
An AccessSpecDecl record.
Definition: ASTBitCodes.h:1448
void setAtLoc(SourceLocation L)
Definition: DeclObjC.h:814
A convenient class for passing around template argument information.
Definition: TemplateBase.h:552
void setParamDestroyedInCallee(bool V)
Definition: Decl.h:3712
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:1409
A UsingDirecitveDecl record.
Definition: ASTBitCodes.h:1412
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:2792
void VisitCXXRecordDecl(CXXRecordDecl *D)
static ClassTemplateSpecializationDecl * CreateDeserialized(ASTContext &C, unsigned ID)
void setSuperClass(ObjCInterfaceDecl *superCls)
Definition: DeclObjC.h:2685
A DecompositionDecl record.
Definition: ASTBitCodes.h:1357
Represents a declaration of a type.
Definition: Decl.h:2851
void setHasObjectMember(bool val)
Definition: Decl.h:3652
void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D)
void VisitMSPropertyDecl(MSPropertyDecl *FD)
static ObjCCategoryImplDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:2057
void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D)
ASTContext & getContext()
Retrieve the AST context that this AST reader supplements.
Definition: ASTReader.h:2307
void setHasImplicitReturnZero(bool IRZ)
State that falling off this function implicitly returns null/zero.
Definition: Decl.h:2038
MemberSpecializationInfo * getMemberSpecializationInfo() const
If this enumeration is an instantiation of a member enumeration of a class template specialization...
Definition: Decl.h:3551
DeclID VisitTemplateDecl(TemplateDecl *D)
SourceRange readSourceRange()
Read a source range, advancing Idx.
Definition: ASTReader.h:2603
void setClassInterface(ObjCInterfaceDecl *D)
Definition: DeclObjC.h:2741
CXXRecordDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:728
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1163
static FileScopeAsmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4586
void VisitCXXMethodDecl(CXXMethodDecl *D)
void setTrivial(bool IT)
Definition: Decl.h:2006
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:4556
A ClassTemplateSpecializationDecl record.
Definition: ASTBitCodes.h:1460
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2056
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:827
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:4013
Represents an ObjC class declaration.
Definition: DeclObjC.h:1164
Represents a linkage specification.
Definition: DeclCXX.h:2822
static ParmVarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:2534
void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D)
CXXRecordDecl * getTemplatedDecl() const
Get the underlying class declarations of the template.
A binding in a decomposition declaration.
Definition: DeclCXX.h:3791
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:3317
void setInitVal(const llvm::APSInt &V)
Definition: Decl.h:2787
Ordinary names.
Definition: DeclBase.h:145
void setInitExpr(Expr *E)
Definition: Decl.h:2786
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:396
void setLocStart(SourceLocation L)
Definition: Decl.h:2879
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:876
void setHasInheritedPrototype(bool P=true)
State that this function inherited its prototype from a previous declaration.
Definition: Decl.h:2068
static std::string ReadString(const RecordData &Record, unsigned &Idx)
Definition: ASTReader.cpp:9079
void setGetterCXXConstructor(Expr *getterCXXConstructor)
Definition: DeclObjC.h:2845
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1566
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:1840
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2751
IdentifierInfo * GetIdentifierInfo(ModuleFile &M, const RecordData &Record, unsigned &Idx)
Definition: ASTReader.h:2047
llvm::FoldingSetVector< FunctionTemplateSpecializationInfo > Specializations
The function template specializations for this function template, including explicit specializations ...
Definition: DeclTemplate.h:977
void setVariadic(bool isVar)
Definition: DeclObjC.h:420
static TemplateTypeParmDecl * CreateDeserialized(const ASTContext &C, unsigned ID)
bool hasAttr() const
Definition: DeclBase.h:537
Represents the declaration of a typedef-name via a C++11 alias-declaration.
Definition: Decl.h:3015
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1605
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3550
RedeclarableResult VisitRedeclarable(Redeclarable< T > *D)
void setHasDestructors(bool val)
Definition: DeclObjC.h:2652
void VisitObjCContainerDecl(ObjCContainerDecl *D)
void setImplicitlyInline(bool I=true)
Flag that this function is implicitly inline.
Definition: Decl.h:2328
static ObjCCompatibleAliasDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:2208
void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D)
CXXDestructorDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:2742
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:688
A CXXDeductionGuideDecl record.
Definition: ASTBitCodes.h:1430
void VisitParmVarDecl(ParmVarDecl *PD)
void setStorageClass(StorageClass SClass)
Sets the storage class as written in the source.
Definition: Decl.h:2313
void VisitLinkageSpecDecl(LinkageSpecDecl *D)
void setIvarRBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2689
A StaticAssertDecl record.
Definition: ASTBitCodes.h:1490
for(unsigned I=0, E=TL.getNumArgs();I !=E;++I)
A VarTemplateSpecializationDecl record.
Definition: ASTBitCodes.h:1469
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:1972
void setSynthesize(bool synth)
Definition: DeclObjC.h:1982
void VisitFriendDecl(FriendDecl *D)
An ObjCTypeParamDecl record.
Definition: ASTBitCodes.h:1523
void VisitDecl(Decl *D)
A record containing CXXBaseSpecifiers.
Definition: ASTBitCodes.h:1493
DiagnosticBuilder Diag(unsigned DiagID) const
Report a diagnostic.
Definition: ASTReader.cpp:9112
void setTrivialForCall(bool IT)
Definition: Decl.h:2009
void setType(QualType T, TypeSourceInfo *TSI)
Definition: DeclObjC.h:823
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:882
void setGetterMethodDecl(ObjCMethodDecl *gDecl)
Definition: DeclObjC.h:915
Represents a shadow constructor declaration introduced into a class by a C++11 using-declaration that...
Definition: DeclCXX.h:3236
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3835
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
This represents one expression.
Definition: Expr.h:105
A ObjCCategoryImplDecl record.
Definition: ASTBitCodes.h:1327
Defines the clang::LangOptions interface.
void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD)
void setBitWidth(Expr *Width)
Set the bit-field width for this member.
Definition: Decl.h:2658
static LinkageSpecDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2504
A ObjCPropertyImplDecl record.
Definition: ASTBitCodes.h:1339
StateNode * Previous
Declaration of a template type parameter.
void setSetterMethodDecl(ObjCMethodDecl *gDecl)
Definition: DeclObjC.h:918
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:6653
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2702
const internal::VariadicAllOfMatcher< Decl > decl
Matches declarations.
void setInit(Expr *I)
Definition: Decl.cpp:2195
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:132
A CXXConstructorDecl record.
Definition: ASTBitCodes.h:1436
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:728
void setContextParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4082
void setAtEndRange(SourceRange atEnd)
Definition: DeclObjC.h:1116
void setRBraceLoc(SourceLocation L)
Definition: DeclCXX.h:2873
static DeclLink PreviousDeclLink(decl_type *D)
Definition: Redeclarable.h:167
void setRelatedResultType(bool RRT=true)
Note whether this method has a related result type.
Definition: DeclObjC.h:262
DeclContext * getDeclContext()
Definition: DeclBase.h:427
SourceRange ReadSourceRange(ModuleFile &F, const RecordData &Record, unsigned &Idx)
Read a source range.
Definition: ASTReader.cpp:9049
A record containing CXXCtorInitializers.
Definition: ASTBitCodes.h:1496
A VarTemplateDecl record.
Definition: ASTBitCodes.h:1466
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:1434
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:2510
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:2428
void setDefined(bool isDefined)
Definition: DeclObjC.h:433
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:201
void setCompleteDefinitionRequired(bool V=true)
True if this complete decl is required to be complete for some existing use.
Definition: Decl.h:3161
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*.
void setLateTemplateParsed(bool ILT=true)
State that this templated function will be late parsed.
Definition: Decl.h:1997
static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous, Decl *Canon)
AutoType * getContainedAutoType() const
Get the AutoType whose type will be deduced for a variable with an initializer of this type...
Definition: Type.h:2157
IdentifierInfo * getAsIdentifierInfo() const
Retrieve the IdentifierInfo * stored in this declaration name, or null if this declaration name isn&#39;t...
const uint64_t & back() const
The last element in this record.
Definition: ASTReader.h:2397
A CXXDestructorDecl record.
Definition: ASTBitCodes.h:1442
SmallVector< uint64_t, 1 > ObjCCategories
The Objective-C category lists for categories known to this module.
Definition: Module.h:443
A NonTypeTemplateParmDecl record that stores an expanded non-type template parameter pack...
Definition: ASTBitCodes.h:1503
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
static NamespaceAliasDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2621
static CXXConstructorDecl * CreateDeserialized(ASTContext &C, unsigned ID, bool InheritsConstructor)
Definition: DeclCXX.cpp:2281
bool isFunctionOrMethod() const
Definition: DeclBase.h:1806
StorageClass
Storage classes.
Definition: Specifiers.h:206
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:433
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:1397
void setTypename(bool TN)
Sets whether the using declaration has &#39;typename&#39;.
Definition: DeclCXX.h:3406
Declaration of an alias template.
void setModedTypeSourceInfo(TypeSourceInfo *unmodedTSI, QualType modedTy)
Definition: Decl.h:2959
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:1386
void setLocation(SourceLocation L)
Definition: DeclBase.h:419
TemplateTemplateParmDecl - Declares a template template parameter, e.g., "T" in.
void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D)
An ImplicitParamDecl record.
Definition: ASTBitCodes.h:1351
void setIvarRBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2410
void VisitDecompositionDecl(DecompositionDecl *DD)
void setIsRedeclaration(bool RD)
Definition: DeclObjC.h:268
Represents a C++ deduction guide declaration.
Definition: DeclCXX.h:1990
Represents a C++ conversion function within a class.
Definition: DeclCXX.h:2764
static UsingDirectiveDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2525
An EnumConstantDecl record.
Definition: ASTBitCodes.h:1303
static ObjCTypeParamDecl * CreateDeserialized(ASTContext &ctx, unsigned ID)
Definition: DeclObjC.cpp:1401
std::string readString()
Read a string, advancing Idx.
Definition: ASTReader.h:2623
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:707
void VisitNamespaceAliasDecl(NamespaceAliasDecl *D)
void setHasSkippedBody(bool Skipped=true)
Definition: DeclObjC.h:458
An ImportDecl recording a module import.
Definition: ASTBitCodes.h:1514
A ObjCCategoryDecl record.
Definition: ASTBitCodes.h:1324
void setDoesNotEscape(bool B=true)
Definition: Decl.h:3979
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:822
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:216
void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D)
void VisitObjCProtocolDecl(ObjCProtocolDecl *D)
A ObjCCompatibleAliasDecl record.
Definition: ASTBitCodes.h:1333
void setHasExternalVisibleStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:2336
Attr * ReadAttr(ModuleFile &M, const RecordData &Record, unsigned &Idx)
Reads one attribute from the current stream position.
bool hasAttrs() const
Definition: DeclBase.h:473
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:3781
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:3903
void addAttr(Attr *A)
Definition: DeclBase.h:486
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:4331
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:4183
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 setIsConversionFromLambda(bool val=true)
Definition: Decl.h:3974
void setColonLoc(SourceLocation CLoc)
Sets the location of the colon.
Definition: DeclCXX.h:157
An UnresolvedUsingValueDecl record.
Definition: ASTBitCodes.h:1415
The "struct" keyword.
Definition: Type.h:4914
void VisitDeclaratorDecl(DeclaratorDecl *DD)
static ObjCProtocolDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:1867
static EnumConstantDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4458
Kind
static UsingShadowDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2645
decl_type * getPreviousDecl()
Return the previous declaration of this declaration or NULL if this is the first declaration.
Definition: Redeclarable.h:204
static void markIncompleteDeclChainImpl(Redeclarable< DeclT > *D)
static CXXDestructorDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2425
Encodes a location in the source.
static EmptyDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4598
QualType getReturnType() const
Definition: Type.h:3483
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:592
static TemplateTemplateParmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:790
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:1388
Pseudo declaration for capturing expressions.
Definition: DeclOpenMP.h:216
void setIvarLBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2408
void setBraceRange(SourceRange R)
Definition: Decl.h:3123
void setAtStartLoc(SourceLocation Loc)
Definition: DeclObjC.h:1109
void VisitEmptyDecl(EmptyDecl *D)
void setAnonymousNamespace(NamespaceDecl *D)
Definition: Decl.h:601
void setFreeStanding(bool isFreeStanding=true)
True if this tag is free standing, e.g. "struct foo;".
Definition: Decl.h:3184
void setObjCDeclQualifier(ObjCDeclQualifier QV)
Definition: DeclObjC.h:251
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3041
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:376
static DecompositionDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumBindings)
Definition: DeclCXX.cpp:2853
Defines several types used to describe C++ lambda expressions that are shared between the parser and ...
void setReferenced(bool R=true)
Definition: DeclBase.h:583
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:848
Represents a dependent using declaration which was not marked with typename.
Definition: DeclCXX.h:3567
void setPosition(unsigned P)
void setIsCopyDeductionCandidate(bool isCDC=true)
Definition: DeclCXX.h:2026
void VisitObjCImplDecl(ObjCImplDecl *D)
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2043
void setDefaulted(bool D=true)
Definition: Decl.h:2014
void setHasFlexibleArrayMember(bool V)
Definition: Decl.h:3628
EnumDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.h:3382
Represents a C++ nested name specifier, such as "\::std::vector<int>::".
void VisitBindingDecl(BindingDecl *BD)
A TemplateTypeParmDecl record.
Definition: ASTBitCodes.h:1478
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:223
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:2272
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:2537
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:2889
SourceLocation getLocation() const
Definition: ASTBitCodes.h:236
void setOverriding(bool IsOver)
Definition: DeclObjC.h:443
static ConstructorUsingShadowDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2668
Describes the categories of an Objective-C class.
Definition: ASTBitCodes.h:2024
bool isDeclIDFromModule(serialization::GlobalDeclID ID, ModuleFile &M) const
Returns true if global DeclID ID originated from module M.
Definition: ASTReader.cpp:7220
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:3224
unsigned getIdx() const
The current position in this record.
Definition: ASTReader.h:2388
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:4414
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:721
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:2336
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:701
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:183
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:1277
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:2411
static VarTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty variable template node.
A NamespaceDecl record.
Definition: ASTBitCodes.h:1394
Represents a C++11 static_assert declaration.
Definition: DeclCXX.h:3742
__DEVICE__ void * memcpy(void *__a, const void *__b, size_t __c)
uint32_t BitOffset
Offset in the AST file.
Definition: ASTBitCodes.h:226
void setExplicitlyDefaulted(bool ED=true)
State that this function is explicitly defaulted per C++0x.
Definition: Decl.h:2024
void setLAngleLoc(SourceLocation Loc)
Definition: TemplateBase.h:571
void VisitExportDecl(ExportDecl *D)
void addArgument(const TemplateArgumentLoc &Loc)
Definition: TemplateBase.h:592
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:3821
Describes a module import declaration, which makes the contents of the named module visible in the cu...
Definition: Decl.h:4118
serialization::DeclID readDeclID()
Reads a declaration ID from the given position in this record.
Definition: ASTReader.h:2504
void VisitValueDecl(ValueDecl *VD)
void setVirtualAsWritten(bool V)
State that this function is marked as virtual explicitly.
Definition: Decl.h:1984
A ObjCProtocolDecl record.
Definition: ASTBitCodes.h:1315
void setDeclaredWithTypename(bool withTypename)
Set whether this template type parameter was declared with the &#39;typename&#39; or &#39;class&#39; keyword...
void setHasWrittenPrototype(bool P=true)
State that this function has a written prototype.
Definition: Decl.h:2056
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:2853
void VisitEnumDecl(EnumDecl *ED)
static TypedefDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4544
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2893
void setPropertyDecl(ObjCPropertyDecl *Prop)
Definition: DeclObjC.h:2813
A CXXConversionDecl record.
Definition: ASTBitCodes.h:1445
bool isDeduced() const
Definition: Type.h:4621
TagTypeKind
The kind of a tag type.
Definition: Type.h:4912
ObjCTypeParamList * ReadObjCTypeParamList()
Dataflow Directional Tag Classes.
void VisitCXXConversionDecl(CXXConversionDecl *D)
void setDescribedAliasTemplate(TypeAliasTemplateDecl *TAT)
Definition: Decl.h:3033
void setBody(CompoundStmt *B)
Definition: Decl.h:3907
static CXXConversionDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2457
llvm::BitstreamCursor DeclsCursor
DeclsCursor - This is a cursor to the start of the DECLS_BLOCK block.
Definition: Module.h:406