clang  10.0.0svn
ASTReaderDecl.cpp
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1 //===- ASTReaderDecl.cpp - Decl Deserialization ---------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the ASTReader::ReadDeclRecord method, which is the
10 // entrypoint for loading a decl.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "ASTCommon.h"
15 #include "ASTReaderInternals.h"
16 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/Attr.h"
18 #include "clang/AST/AttrIterator.h"
19 #include "clang/AST/Decl.h"
20 #include "clang/AST/DeclBase.h"
21 #include "clang/AST/DeclCXX.h"
22 #include "clang/AST/DeclFriend.h"
23 #include "clang/AST/DeclObjC.h"
24 #include "clang/AST/DeclOpenMP.h"
25 #include "clang/AST/DeclTemplate.h"
26 #include "clang/AST/DeclVisitor.h"
28 #include "clang/AST/Expr.h"
32 #include "clang/AST/OpenMPClause.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"
54 #include "llvm/ADT/DenseMap.h"
55 #include "llvm/ADT/FoldingSet.h"
56 #include "llvm/ADT/STLExtras.h"
57 #include "llvm/ADT/SmallPtrSet.h"
58 #include "llvm/ADT/SmallVector.h"
59 #include "llvm/ADT/iterator_range.h"
60 #include "llvm/Bitstream/BitstreamReader.h"
61 #include "llvm/Support/Casting.h"
62 #include "llvm/Support/ErrorHandling.h"
63 #include "llvm/Support/SaveAndRestore.h"
64 #include <algorithm>
65 #include <cassert>
66 #include <cstdint>
67 #include <cstring>
68 #include <string>
69 #include <utility>
70 
71 using namespace clang;
72 using namespace serialization;
73 
74 //===----------------------------------------------------------------------===//
75 // Declaration deserialization
76 //===----------------------------------------------------------------------===//
77 
78 namespace clang {
79 
80  class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
81  ASTReader &Reader;
82  ASTRecordReader &Record;
83  ASTReader::RecordLocation Loc;
84  const DeclID ThisDeclID;
85  const SourceLocation ThisDeclLoc;
86 
88 
89  TypeID DeferredTypeID = 0;
90  unsigned AnonymousDeclNumber;
91  GlobalDeclID NamedDeclForTagDecl = 0;
92  IdentifierInfo *TypedefNameForLinkage = nullptr;
93 
94  bool HasPendingBody = false;
95 
96  ///A flag to carry the information for a decl from the entity is
97  /// used. We use it to delay the marking of the canonical decl as used until
98  /// the entire declaration is deserialized and merged.
99  bool IsDeclMarkedUsed = false;
100 
101  uint64_t GetCurrentCursorOffset();
102 
103  uint64_t ReadLocalOffset() {
104  uint64_t LocalOffset = Record.readInt();
105  assert(LocalOffset < Loc.Offset && "offset point after current record");
106  return LocalOffset ? Loc.Offset - LocalOffset : 0;
107  }
108 
109  uint64_t ReadGlobalOffset() {
110  uint64_t Local = ReadLocalOffset();
111  return Local ? Record.getGlobalBitOffset(Local) : 0;
112  }
113 
114  SourceLocation ReadSourceLocation() {
115  return Record.readSourceLocation();
116  }
117 
118  SourceRange ReadSourceRange() {
119  return Record.readSourceRange();
120  }
121 
122  TypeSourceInfo *GetTypeSourceInfo() {
123  return Record.getTypeSourceInfo();
124  }
125 
126  serialization::DeclID ReadDeclID() {
127  return Record.readDeclID();
128  }
129 
130  std::string ReadString() {
131  return Record.readString();
132  }
133 
134  void ReadDeclIDList(SmallVectorImpl<DeclID> &IDs) {
135  for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
136  IDs.push_back(ReadDeclID());
137  }
138 
139  Decl *ReadDecl() {
140  return Record.readDecl();
141  }
142 
143  template<typename T>
144  T *ReadDeclAs() {
145  return Record.readDeclAs<T>();
146  }
147 
148  void ReadQualifierInfo(QualifierInfo &Info) {
149  Record.readQualifierInfo(Info);
150  }
151 
152  void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name) {
153  Record.readDeclarationNameLoc(DNLoc, Name);
154  }
155 
156  serialization::SubmoduleID readSubmoduleID() {
157  if (Record.getIdx() == Record.size())
158  return 0;
159 
160  return Record.getGlobalSubmoduleID(Record.readInt());
161  }
162 
163  Module *readModule() {
164  return Record.getSubmodule(readSubmoduleID());
165  }
166 
167  void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
168  void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
169  const CXXRecordDecl *D);
170  void MergeDefinitionData(CXXRecordDecl *D,
171  struct CXXRecordDecl::DefinitionData &&NewDD);
172  void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
173  void MergeDefinitionData(ObjCInterfaceDecl *D,
174  struct ObjCInterfaceDecl::DefinitionData &&NewDD);
175  void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
176  void MergeDefinitionData(ObjCProtocolDecl *D,
177  struct ObjCProtocolDecl::DefinitionData &&NewDD);
178 
179  static DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
180 
181  static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
182  DeclContext *DC,
183  unsigned Index);
184  static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
185  unsigned Index, NamedDecl *D);
186 
187  /// Results from loading a RedeclarableDecl.
188  class RedeclarableResult {
189  Decl *MergeWith;
190  GlobalDeclID FirstID;
191  bool IsKeyDecl;
192 
193  public:
194  RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
195  : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
196 
197  /// Retrieve the first ID.
198  GlobalDeclID getFirstID() const { return FirstID; }
199 
200  /// Is this declaration a key declaration?
201  bool isKeyDecl() const { return IsKeyDecl; }
202 
203  /// Get a known declaration that this should be merged with, if
204  /// any.
205  Decl *getKnownMergeTarget() const { return MergeWith; }
206  };
207 
208  /// Class used to capture the result of searching for an existing
209  /// declaration of a specific kind and name, along with the ability
210  /// to update the place where this result was found (the declaration
211  /// chain hanging off an identifier or the DeclContext we searched in)
212  /// if requested.
213  class FindExistingResult {
214  ASTReader &Reader;
215  NamedDecl *New = nullptr;
216  NamedDecl *Existing = nullptr;
217  bool AddResult = false;
218  unsigned AnonymousDeclNumber = 0;
219  IdentifierInfo *TypedefNameForLinkage = nullptr;
220 
221  public:
222  FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
223 
224  FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
225  unsigned AnonymousDeclNumber,
226  IdentifierInfo *TypedefNameForLinkage)
227  : Reader(Reader), New(New), Existing(Existing), AddResult(true),
228  AnonymousDeclNumber(AnonymousDeclNumber),
229  TypedefNameForLinkage(TypedefNameForLinkage) {}
230 
231  FindExistingResult(FindExistingResult &&Other)
232  : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
233  AddResult(Other.AddResult),
234  AnonymousDeclNumber(Other.AnonymousDeclNumber),
235  TypedefNameForLinkage(Other.TypedefNameForLinkage) {
236  Other.AddResult = false;
237  }
238 
239  FindExistingResult &operator=(FindExistingResult &&) = delete;
240  ~FindExistingResult();
241 
242  /// Suppress the addition of this result into the known set of
243  /// names.
244  void suppress() { AddResult = false; }
245 
246  operator NamedDecl*() const { return Existing; }
247 
248  template<typename T>
249  operator T*() const { return dyn_cast_or_null<T>(Existing); }
250  };
251 
252  static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
253  DeclContext *DC);
254  FindExistingResult findExisting(NamedDecl *D);
255 
256  public:
258  ASTReader::RecordLocation Loc,
259  DeclID thisDeclID, SourceLocation ThisDeclLoc)
260  : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
261  ThisDeclLoc(ThisDeclLoc) {}
262 
263  template <typename T> static
266  if (IDs.empty())
267  return;
268 
269  // FIXME: We should avoid this pattern of getting the ASTContext.
270  ASTContext &C = D->getASTContext();
271 
272  auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
273 
274  if (auto &Old = LazySpecializations) {
275  IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
276  llvm::sort(IDs);
277  IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
278  }
279 
280  auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
281  *Result = IDs.size();
282  std::copy(IDs.begin(), IDs.end(), Result + 1);
283 
284  LazySpecializations = Result;
285  }
286 
287  template <typename DeclT>
288  static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
289  static Decl *getMostRecentDeclImpl(...);
290  static Decl *getMostRecentDecl(Decl *D);
291 
292  template <typename DeclT>
293  static void attachPreviousDeclImpl(ASTReader &Reader,
295  Decl *Canon);
296  static void attachPreviousDeclImpl(ASTReader &Reader, ...);
297  static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
298  Decl *Canon);
299 
300  template <typename DeclT>
301  static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
302  static void attachLatestDeclImpl(...);
303  static void attachLatestDecl(Decl *D, Decl *latest);
304 
305  template <typename DeclT>
306  static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
307  static void markIncompleteDeclChainImpl(...);
308 
309  /// Determine whether this declaration has a pending body.
310  bool hasPendingBody() const { return HasPendingBody; }
311 
312  void ReadFunctionDefinition(FunctionDecl *FD);
313  void Visit(Decl *D);
314 
315  void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
316 
318  ObjCCategoryDecl *Next) {
319  Cat->NextClassCategory = Next;
320  }
321 
322  void VisitDecl(Decl *D);
323  void VisitPragmaCommentDecl(PragmaCommentDecl *D);
324  void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
325  void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
326  void VisitNamedDecl(NamedDecl *ND);
327  void VisitLabelDecl(LabelDecl *LD);
328  void VisitNamespaceDecl(NamespaceDecl *D);
329  void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
330  void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
331  void VisitTypeDecl(TypeDecl *TD);
332  RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
333  void VisitTypedefDecl(TypedefDecl *TD);
334  void VisitTypeAliasDecl(TypeAliasDecl *TD);
335  void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
336  RedeclarableResult VisitTagDecl(TagDecl *TD);
337  void VisitEnumDecl(EnumDecl *ED);
338  RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
339  void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
340  RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
341  void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
342  RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
344 
347  VisitClassTemplateSpecializationDeclImpl(D);
348  }
349 
350  void VisitClassTemplatePartialSpecializationDecl(
352  void VisitClassScopeFunctionSpecializationDecl(
354  RedeclarableResult
355  VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
356 
358  VisitVarTemplateSpecializationDeclImpl(D);
359  }
360 
361  void VisitVarTemplatePartialSpecializationDecl(
363  void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
364  void VisitValueDecl(ValueDecl *VD);
365  void VisitEnumConstantDecl(EnumConstantDecl *ECD);
366  void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
367  void VisitDeclaratorDecl(DeclaratorDecl *DD);
368  void VisitFunctionDecl(FunctionDecl *FD);
369  void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
370  void VisitCXXMethodDecl(CXXMethodDecl *D);
371  void VisitCXXConstructorDecl(CXXConstructorDecl *D);
372  void VisitCXXDestructorDecl(CXXDestructorDecl *D);
373  void VisitCXXConversionDecl(CXXConversionDecl *D);
374  void VisitFieldDecl(FieldDecl *FD);
375  void VisitMSPropertyDecl(MSPropertyDecl *FD);
376  void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
377  RedeclarableResult VisitVarDeclImpl(VarDecl *D);
378  void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
379  void VisitImplicitParamDecl(ImplicitParamDecl *PD);
380  void VisitParmVarDecl(ParmVarDecl *PD);
381  void VisitDecompositionDecl(DecompositionDecl *DD);
382  void VisitBindingDecl(BindingDecl *BD);
383  void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
384  DeclID VisitTemplateDecl(TemplateDecl *D);
385  void VisitConceptDecl(ConceptDecl *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 VisitOMPAllocateDecl(OMPAllocateDecl *D);
449  void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
450  void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
451  void VisitOMPRequiresDecl(OMPRequiresDecl *D);
452  void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
453  };
454 
455 } // namespace clang
456 
457 namespace {
458 
459 /// Iterator over the redeclarations of a declaration that have already
460 /// been merged into the same redeclaration chain.
461 template<typename DeclT>
462 class MergedRedeclIterator {
463  DeclT *Start;
464  DeclT *Canonical = nullptr;
465  DeclT *Current = nullptr;
466 
467 public:
468  MergedRedeclIterator() = default;
469  MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
470 
471  DeclT *operator*() { return Current; }
472 
473  MergedRedeclIterator &operator++() {
474  if (Current->isFirstDecl()) {
475  Canonical = Current;
476  Current = Current->getMostRecentDecl();
477  } else
478  Current = Current->getPreviousDecl();
479 
480  // If we started in the merged portion, we'll reach our start position
481  // eventually. Otherwise, we'll never reach it, but the second declaration
482  // we reached was the canonical declaration, so stop when we see that one
483  // again.
484  if (Current == Start || Current == Canonical)
485  Current = nullptr;
486  return *this;
487  }
488 
489  friend bool operator!=(const MergedRedeclIterator &A,
490  const MergedRedeclIterator &B) {
491  return A.Current != B.Current;
492  }
493 };
494 
495 } // namespace
496 
497 template <typename DeclT>
498 static llvm::iterator_range<MergedRedeclIterator<DeclT>>
499 merged_redecls(DeclT *D) {
500  return llvm::make_range(MergedRedeclIterator<DeclT>(D),
501  MergedRedeclIterator<DeclT>());
502 }
503 
504 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
505  return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
506 }
507 
509  if (Record.readInt())
510  Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
511  if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
512  CD->setNumCtorInitializers(Record.readInt());
513  if (CD->getNumCtorInitializers())
514  CD->CtorInitializers = ReadGlobalOffset();
515  }
516  // Store the offset of the body so we can lazily load it later.
517  Reader.PendingBodies[FD] = GetCurrentCursorOffset();
518  HasPendingBody = true;
519 }
520 
523 
524  // At this point we have deserialized and merged the decl and it is safe to
525  // update its canonical decl to signal that the entire entity is used.
526  D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
527  IsDeclMarkedUsed = false;
528 
529  if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
530  if (auto *TInfo = DD->getTypeSourceInfo())
531  Record.readTypeLoc(TInfo->getTypeLoc());
532  }
533 
534  if (auto *TD = dyn_cast<TypeDecl>(D)) {
535  // We have a fully initialized TypeDecl. Read its type now.
536  TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
537 
538  // If this is a tag declaration with a typedef name for linkage, it's safe
539  // to load that typedef now.
540  if (NamedDeclForTagDecl)
541  cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
542  cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
543  } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
544  // if we have a fully initialized TypeDecl, we can safely read its type now.
545  ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
546  } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
547  // FunctionDecl's body was written last after all other Stmts/Exprs.
548  // We only read it if FD doesn't already have a body (e.g., from another
549  // module).
550  // FIXME: Can we diagnose ODR violations somehow?
551  if (Record.readInt())
552  ReadFunctionDefinition(FD);
553  }
554 }
555 
557  if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
558  isa<ParmVarDecl>(D)) {
559  // We don't want to deserialize the DeclContext of a template
560  // parameter or of a parameter of a function template immediately. These
561  // entities might be used in the formulation of its DeclContext (for
562  // example, a function parameter can be used in decltype() in trailing
563  // return type of the function). Use the translation unit DeclContext as a
564  // placeholder.
565  GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID();
566  GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID();
567  if (!LexicalDCIDForTemplateParmDecl)
568  LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
569  Reader.addPendingDeclContextInfo(D,
570  SemaDCIDForTemplateParmDecl,
571  LexicalDCIDForTemplateParmDecl);
572  D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
573  } else {
574  auto *SemaDC = ReadDeclAs<DeclContext>();
575  auto *LexicalDC = ReadDeclAs<DeclContext>();
576  if (!LexicalDC)
577  LexicalDC = SemaDC;
578  DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
579  // Avoid calling setLexicalDeclContext() directly because it uses
580  // Decl::getASTContext() internally which is unsafe during derialization.
581  D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
582  Reader.getContext());
583  }
584  D->setLocation(ThisDeclLoc);
585  D->setInvalidDecl(Record.readInt());
586  if (Record.readInt()) { // hasAttrs
587  AttrVec Attrs;
588  Record.readAttributes(Attrs);
589  // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
590  // internally which is unsafe during derialization.
591  D->setAttrsImpl(Attrs, Reader.getContext());
592  }
593  D->setImplicit(Record.readInt());
594  D->Used = Record.readInt();
595  IsDeclMarkedUsed |= D->Used;
596  D->setReferenced(Record.readInt());
597  D->setTopLevelDeclInObjCContainer(Record.readInt());
598  D->setAccess((AccessSpecifier)Record.readInt());
599  D->FromASTFile = true;
600  bool ModulePrivate = Record.readInt();
601 
602  // Determine whether this declaration is part of a (sub)module. If so, it
603  // may not yet be visible.
604  if (unsigned SubmoduleID = readSubmoduleID()) {
605  // Store the owning submodule ID in the declaration.
610 
611  if (ModulePrivate) {
612  // Module-private declarations are never visible, so there is no work to
613  // do.
614  } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
615  // If local visibility is being tracked, this declaration will become
616  // hidden and visible as the owning module does.
617  } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
618  // Mark the declaration as visible when its owning module becomes visible.
619  if (Owner->NameVisibility == Module::AllVisible)
621  else
622  Reader.HiddenNamesMap[Owner].push_back(D);
623  }
624  } else if (ModulePrivate) {
626  }
627 }
628 
630  VisitDecl(D);
631  D->setLocation(ReadSourceLocation());
632  D->CommentKind = (PragmaMSCommentKind)Record.readInt();
633  std::string Arg = ReadString();
634  memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
635  D->getTrailingObjects<char>()[Arg.size()] = '\0';
636 }
637 
639  VisitDecl(D);
640  D->setLocation(ReadSourceLocation());
641  std::string Name = ReadString();
642  memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
643  D->getTrailingObjects<char>()[Name.size()] = '\0';
644 
645  D->ValueStart = Name.size() + 1;
646  std::string Value = ReadString();
647  memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
648  Value.size());
649  D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
650 }
651 
653  llvm_unreachable("Translation units are not serialized");
654 }
655 
657  VisitDecl(ND);
658  ND->setDeclName(Record.readDeclarationName());
659  AnonymousDeclNumber = Record.readInt();
660 }
661 
663  VisitNamedDecl(TD);
664  TD->setLocStart(ReadSourceLocation());
665  // Delay type reading until after we have fully initialized the decl.
666  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
667 }
668 
669 ASTDeclReader::RedeclarableResult
671  RedeclarableResult Redecl = VisitRedeclarable(TD);
672  VisitTypeDecl(TD);
673  TypeSourceInfo *TInfo = GetTypeSourceInfo();
674  if (Record.readInt()) { // isModed
675  QualType modedT = Record.readType();
676  TD->setModedTypeSourceInfo(TInfo, modedT);
677  } else
678  TD->setTypeSourceInfo(TInfo);
679  // Read and discard the declaration for which this is a typedef name for
680  // linkage, if it exists. We cannot rely on our type to pull in this decl,
681  // because it might have been merged with a type from another module and
682  // thus might not refer to our version of the declaration.
683  ReadDecl();
684  return Redecl;
685 }
686 
688  RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
689  mergeRedeclarable(TD, Redecl);
690 }
691 
693  RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
694  if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>())
695  // Merged when we merge the template.
696  TD->setDescribedAliasTemplate(Template);
697  else
698  mergeRedeclarable(TD, Redecl);
699 }
700 
701 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
702  RedeclarableResult Redecl = VisitRedeclarable(TD);
703  VisitTypeDecl(TD);
704 
705  TD->IdentifierNamespace = Record.readInt();
706  TD->setTagKind((TagDecl::TagKind)Record.readInt());
707  if (!isa<CXXRecordDecl>(TD))
708  TD->setCompleteDefinition(Record.readInt());
709  TD->setEmbeddedInDeclarator(Record.readInt());
710  TD->setFreeStanding(Record.readInt());
711  TD->setCompleteDefinitionRequired(Record.readInt());
712  TD->setBraceRange(ReadSourceRange());
713 
714  switch (Record.readInt()) {
715  case 0:
716  break;
717  case 1: { // ExtInfo
718  auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
719  ReadQualifierInfo(*Info);
720  TD->TypedefNameDeclOrQualifier = Info;
721  break;
722  }
723  case 2: // TypedefNameForAnonDecl
724  NamedDeclForTagDecl = ReadDeclID();
725  TypedefNameForLinkage = Record.getIdentifierInfo();
726  break;
727  default:
728  llvm_unreachable("unexpected tag info kind");
729  }
730 
731  if (!isa<CXXRecordDecl>(TD))
732  mergeRedeclarable(TD, Redecl);
733  return Redecl;
734 }
735 
737  VisitTagDecl(ED);
738  if (TypeSourceInfo *TI = GetTypeSourceInfo())
739  ED->setIntegerTypeSourceInfo(TI);
740  else
741  ED->setIntegerType(Record.readType());
742  ED->setPromotionType(Record.readType());
743  ED->setNumPositiveBits(Record.readInt());
744  ED->setNumNegativeBits(Record.readInt());
745  ED->setScoped(Record.readInt());
746  ED->setScopedUsingClassTag(Record.readInt());
747  ED->setFixed(Record.readInt());
748 
749  ED->setHasODRHash(true);
750  ED->ODRHash = Record.readInt();
751 
752  // If this is a definition subject to the ODR, and we already have a
753  // definition, merge this one into it.
754  if (ED->isCompleteDefinition() &&
755  Reader.getContext().getLangOpts().Modules &&
756  Reader.getContext().getLangOpts().CPlusPlus) {
757  EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
758  if (!OldDef) {
759  // This is the first time we've seen an imported definition. Look for a
760  // local definition before deciding that we are the first definition.
761  for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
762  if (!D->isFromASTFile() && D->isCompleteDefinition()) {
763  OldDef = D;
764  break;
765  }
766  }
767  }
768  if (OldDef) {
769  Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
770  ED->setCompleteDefinition(false);
771  Reader.mergeDefinitionVisibility(OldDef, ED);
772  if (OldDef->getODRHash() != ED->getODRHash())
773  Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
774  } else {
775  OldDef = ED;
776  }
777  }
778 
779  if (auto *InstED = ReadDeclAs<EnumDecl>()) {
780  auto TSK = (TemplateSpecializationKind)Record.readInt();
781  SourceLocation POI = ReadSourceLocation();
782  ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
784  }
785 }
786 
787 ASTDeclReader::RedeclarableResult
789  RedeclarableResult Redecl = VisitTagDecl(RD);
790  RD->setHasFlexibleArrayMember(Record.readInt());
791  RD->setAnonymousStructOrUnion(Record.readInt());
792  RD->setHasObjectMember(Record.readInt());
793  RD->setHasVolatileMember(Record.readInt());
794  RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
795  RD->setNonTrivialToPrimitiveCopy(Record.readInt());
796  RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
797  RD->setParamDestroyedInCallee(Record.readInt());
799  return Redecl;
800 }
801 
803  VisitNamedDecl(VD);
804  // For function declarations, defer reading the type in case the function has
805  // a deduced return type that references an entity declared within the
806  // function.
807  if (isa<FunctionDecl>(VD))
808  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
809  else
810  VD->setType(Record.readType());
811 }
812 
814  VisitValueDecl(ECD);
815  if (Record.readInt())
816  ECD->setInitExpr(Record.readExpr());
817  ECD->setInitVal(Record.readAPSInt());
818  mergeMergeable(ECD);
819 }
820 
822  VisitValueDecl(DD);
823  DD->setInnerLocStart(ReadSourceLocation());
824  if (Record.readInt()) { // hasExtInfo
825  auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
826  ReadQualifierInfo(*Info);
827  DD->DeclInfo = Info;
828  }
829  QualType TSIType = Record.readType();
830  DD->setTypeSourceInfo(
831  TSIType.isNull() ? nullptr
832  : Reader.getContext().CreateTypeSourceInfo(TSIType));
833 }
834 
836  RedeclarableResult Redecl = VisitRedeclarable(FD);
837  VisitDeclaratorDecl(FD);
838 
839  // Attach a type to this function. Use the real type if possible, but fall
840  // back to the type as written if it involves a deduced return type.
841  if (FD->getTypeSourceInfo() &&
843  ->getReturnType()->getContainedAutoType()) {
844  // We'll set up the real type in Visit, once we've finished loading the
845  // function.
846  FD->setType(FD->getTypeSourceInfo()->getType());
847  Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
848  } else {
849  FD->setType(Reader.GetType(DeferredTypeID));
850  }
851  DeferredTypeID = 0;
852 
853  ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName());
854  FD->IdentifierNamespace = Record.readInt();
855 
856  // FunctionDecl's body is handled last at ASTDeclReader::Visit,
857  // after everything else is read.
858 
859  FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
860  FD->setInlineSpecified(Record.readInt());
861  FD->setImplicitlyInline(Record.readInt());
862  FD->setVirtualAsWritten(Record.readInt());
863  FD->setPure(Record.readInt());
864  FD->setHasInheritedPrototype(Record.readInt());
865  FD->setHasWrittenPrototype(Record.readInt());
866  FD->setDeletedAsWritten(Record.readInt());
867  FD->setTrivial(Record.readInt());
868  FD->setTrivialForCall(Record.readInt());
869  FD->setDefaulted(Record.readInt());
870  FD->setExplicitlyDefaulted(Record.readInt());
871  FD->setHasImplicitReturnZero(Record.readInt());
872  FD->setConstexprKind(static_cast<ConstexprSpecKind>(Record.readInt()));
873  FD->setUsesSEHTry(Record.readInt());
874  FD->setHasSkippedBody(Record.readInt());
875  FD->setIsMultiVersion(Record.readInt());
876  FD->setLateTemplateParsed(Record.readInt());
877 
878  FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
879  FD->EndRangeLoc = ReadSourceLocation();
880 
881  FD->ODRHash = Record.readInt();
882  FD->setHasODRHash(true);
883 
884  switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
886  mergeRedeclarable(FD, Redecl);
887  break;
889  // Merged when we merge the template.
890  FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
891  break;
893  auto *InstFD = ReadDeclAs<FunctionDecl>();
894  auto TSK = (TemplateSpecializationKind)Record.readInt();
895  SourceLocation POI = ReadSourceLocation();
896  FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
898  mergeRedeclarable(FD, Redecl);
899  break;
900  }
902  auto *Template = ReadDeclAs<FunctionTemplateDecl>();
903  auto TSK = (TemplateSpecializationKind)Record.readInt();
904 
905  // Template arguments.
907  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
908 
909  // Template args as written.
911  SourceLocation LAngleLoc, RAngleLoc;
912  bool HasTemplateArgumentsAsWritten = Record.readInt();
913  if (HasTemplateArgumentsAsWritten) {
914  unsigned NumTemplateArgLocs = Record.readInt();
915  TemplArgLocs.reserve(NumTemplateArgLocs);
916  for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
917  TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
918 
919  LAngleLoc = ReadSourceLocation();
920  RAngleLoc = ReadSourceLocation();
921  }
922 
923  SourceLocation POI = ReadSourceLocation();
924 
925  ASTContext &C = Reader.getContext();
926  TemplateArgumentList *TemplArgList
927  = TemplateArgumentList::CreateCopy(C, TemplArgs);
928  TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
929  for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
930  TemplArgsInfo.addArgument(TemplArgLocs[i]);
931 
932  MemberSpecializationInfo *MSInfo = nullptr;
933  if (Record.readInt()) {
934  auto *FD = ReadDeclAs<FunctionDecl>();
935  auto TSK = (TemplateSpecializationKind)Record.readInt();
936  SourceLocation POI = ReadSourceLocation();
937 
938  MSInfo = new (C) MemberSpecializationInfo(FD, TSK);
939  MSInfo->setPointOfInstantiation(POI);
940  }
941 
944  C, FD, Template, TSK, TemplArgList,
945  HasTemplateArgumentsAsWritten ? &TemplArgsInfo : nullptr, POI,
946  MSInfo);
947  FD->TemplateOrSpecialization = FTInfo;
948 
949  if (FD->isCanonicalDecl()) { // if canonical add to template's set.
950  // The template that contains the specializations set. It's not safe to
951  // use getCanonicalDecl on Template since it may still be initializing.
952  auto *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
953  // Get the InsertPos by FindNodeOrInsertPos() instead of calling
954  // InsertNode(FTInfo) directly to avoid the getASTContext() call in
955  // FunctionTemplateSpecializationInfo's Profile().
956  // We avoid getASTContext because a decl in the parent hierarchy may
957  // be initializing.
958  llvm::FoldingSetNodeID ID;
960  void *InsertPos = nullptr;
961  FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
962  FunctionTemplateSpecializationInfo *ExistingInfo =
963  CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
964  if (InsertPos)
965  CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
966  else {
967  assert(Reader.getContext().getLangOpts().Modules &&
968  "already deserialized this template specialization");
969  mergeRedeclarable(FD, ExistingInfo->getFunction(), Redecl);
970  }
971  }
972  break;
973  }
975  // Templates.
976  UnresolvedSet<8> TemplDecls;
977  unsigned NumTemplates = Record.readInt();
978  while (NumTemplates--)
979  TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
980 
981  // Templates args.
982  TemplateArgumentListInfo TemplArgs;
983  unsigned NumArgs = Record.readInt();
984  while (NumArgs--)
985  TemplArgs.addArgument(Record.readTemplateArgumentLoc());
986  TemplArgs.setLAngleLoc(ReadSourceLocation());
987  TemplArgs.setRAngleLoc(ReadSourceLocation());
988 
989  FD->setDependentTemplateSpecialization(Reader.getContext(),
990  TemplDecls, TemplArgs);
991  // These are not merged; we don't need to merge redeclarations of dependent
992  // template friends.
993  break;
994  }
995  }
996 
997  // Read in the parameters.
998  unsigned NumParams = Record.readInt();
1000  Params.reserve(NumParams);
1001  for (unsigned I = 0; I != NumParams; ++I)
1002  Params.push_back(ReadDeclAs<ParmVarDecl>());
1003  FD->setParams(Reader.getContext(), Params);
1004 }
1005 
1007  VisitNamedDecl(MD);
1008  if (Record.readInt()) {
1009  // Load the body on-demand. Most clients won't care, because method
1010  // definitions rarely show up in headers.
1011  Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1012  HasPendingBody = true;
1013  MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
1014  MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
1015  }
1016  MD->setInstanceMethod(Record.readInt());
1017  MD->setVariadic(Record.readInt());
1018  MD->setPropertyAccessor(Record.readInt());
1019  MD->setDefined(Record.readInt());
1020  MD->setOverriding(Record.readInt());
1021  MD->setHasSkippedBody(Record.readInt());
1022 
1023  MD->setIsRedeclaration(Record.readInt());
1024  MD->setHasRedeclaration(Record.readInt());
1025  if (MD->hasRedeclaration())
1026  Reader.getContext().setObjCMethodRedeclaration(MD,
1027  ReadDeclAs<ObjCMethodDecl>());
1028 
1030  MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1031  MD->setRelatedResultType(Record.readInt());
1032  MD->setReturnType(Record.readType());
1033  MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
1034  MD->DeclEndLoc = ReadSourceLocation();
1035  unsigned NumParams = Record.readInt();
1037  Params.reserve(NumParams);
1038  for (unsigned I = 0; I != NumParams; ++I)
1039  Params.push_back(ReadDeclAs<ParmVarDecl>());
1040 
1041  MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1042  unsigned NumStoredSelLocs = Record.readInt();
1044  SelLocs.reserve(NumStoredSelLocs);
1045  for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1046  SelLocs.push_back(ReadSourceLocation());
1047 
1048  MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1049 }
1050 
1052  VisitTypedefNameDecl(D);
1053 
1054  D->Variance = Record.readInt();
1055  D->Index = Record.readInt();
1056  D->VarianceLoc = ReadSourceLocation();
1057  D->ColonLoc = ReadSourceLocation();
1058 }
1059 
1061  VisitNamedDecl(CD);
1062  CD->setAtStartLoc(ReadSourceLocation());
1063  CD->setAtEndRange(ReadSourceRange());
1064 }
1065 
1067  unsigned numParams = Record.readInt();
1068  if (numParams == 0)
1069  return nullptr;
1070 
1072  typeParams.reserve(numParams);
1073  for (unsigned i = 0; i != numParams; ++i) {
1074  auto *typeParam = ReadDeclAs<ObjCTypeParamDecl>();
1075  if (!typeParam)
1076  return nullptr;
1077 
1078  typeParams.push_back(typeParam);
1079  }
1080 
1081  SourceLocation lAngleLoc = ReadSourceLocation();
1082  SourceLocation rAngleLoc = ReadSourceLocation();
1083 
1084  return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1085  typeParams, rAngleLoc);
1086 }
1087 
1088 void ASTDeclReader::ReadObjCDefinitionData(
1089  struct ObjCInterfaceDecl::DefinitionData &Data) {
1090  // Read the superclass.
1091  Data.SuperClassTInfo = GetTypeSourceInfo();
1092 
1093  Data.EndLoc = ReadSourceLocation();
1094  Data.HasDesignatedInitializers = Record.readInt();
1095 
1096  // Read the directly referenced protocols and their SourceLocations.
1097  unsigned NumProtocols = Record.readInt();
1099  Protocols.reserve(NumProtocols);
1100  for (unsigned I = 0; I != NumProtocols; ++I)
1101  Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1103  ProtoLocs.reserve(NumProtocols);
1104  for (unsigned I = 0; I != NumProtocols; ++I)
1105  ProtoLocs.push_back(ReadSourceLocation());
1106  Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1107  Reader.getContext());
1108 
1109  // Read the transitive closure of protocols referenced by this class.
1110  NumProtocols = Record.readInt();
1111  Protocols.clear();
1112  Protocols.reserve(NumProtocols);
1113  for (unsigned I = 0; I != NumProtocols; ++I)
1114  Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1115  Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1116  Reader.getContext());
1117 }
1118 
1119 void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1120  struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1121  // FIXME: odr checking?
1122 }
1123 
1125  RedeclarableResult Redecl = VisitRedeclarable(ID);
1126  VisitObjCContainerDecl(ID);
1127  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1128  mergeRedeclarable(ID, Redecl);
1129 
1130  ID->TypeParamList = ReadObjCTypeParamList();
1131  if (Record.readInt()) {
1132  // Read the definition.
1133  ID->allocateDefinitionData();
1134 
1135  ReadObjCDefinitionData(ID->data());
1136  ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1137  if (Canon->Data.getPointer()) {
1138  // If we already have a definition, keep the definition invariant and
1139  // merge the data.
1140  MergeDefinitionData(Canon, std::move(ID->data()));
1141  ID->Data = Canon->Data;
1142  } else {
1143  // Set the definition data of the canonical declaration, so other
1144  // redeclarations will see it.
1145  ID->getCanonicalDecl()->Data = ID->Data;
1146 
1147  // We will rebuild this list lazily.
1148  ID->setIvarList(nullptr);
1149  }
1150 
1151  // Note that we have deserialized a definition.
1152  Reader.PendingDefinitions.insert(ID);
1153 
1154  // Note that we've loaded this Objective-C class.
1155  Reader.ObjCClassesLoaded.push_back(ID);
1156  } else {
1157  ID->Data = ID->getCanonicalDecl()->Data;
1158  }
1159 }
1160 
1162  VisitFieldDecl(IVD);
1163  IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1164  // This field will be built lazily.
1165  IVD->setNextIvar(nullptr);
1166  bool synth = Record.readInt();
1167  IVD->setSynthesize(synth);
1168 }
1169 
1170 void ASTDeclReader::ReadObjCDefinitionData(
1171  struct ObjCProtocolDecl::DefinitionData &Data) {
1172  unsigned NumProtoRefs = Record.readInt();
1174  ProtoRefs.reserve(NumProtoRefs);
1175  for (unsigned I = 0; I != NumProtoRefs; ++I)
1176  ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1178  ProtoLocs.reserve(NumProtoRefs);
1179  for (unsigned I = 0; I != NumProtoRefs; ++I)
1180  ProtoLocs.push_back(ReadSourceLocation());
1181  Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1182  ProtoLocs.data(), Reader.getContext());
1183 }
1184 
1185 void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1186  struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1187  // FIXME: odr checking?
1188 }
1189 
1191  RedeclarableResult Redecl = VisitRedeclarable(PD);
1192  VisitObjCContainerDecl(PD);
1193  mergeRedeclarable(PD, Redecl);
1194 
1195  if (Record.readInt()) {
1196  // Read the definition.
1197  PD->allocateDefinitionData();
1198 
1199  ReadObjCDefinitionData(PD->data());
1200 
1201  ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1202  if (Canon->Data.getPointer()) {
1203  // If we already have a definition, keep the definition invariant and
1204  // merge the data.
1205  MergeDefinitionData(Canon, std::move(PD->data()));
1206  PD->Data = Canon->Data;
1207  } else {
1208  // Set the definition data of the canonical declaration, so other
1209  // redeclarations will see it.
1210  PD->getCanonicalDecl()->Data = PD->Data;
1211  }
1212  // Note that we have deserialized a definition.
1213  Reader.PendingDefinitions.insert(PD);
1214  } else {
1215  PD->Data = PD->getCanonicalDecl()->Data;
1216  }
1217 }
1218 
1220  VisitFieldDecl(FD);
1221 }
1222 
1224  VisitObjCContainerDecl(CD);
1225  CD->setCategoryNameLoc(ReadSourceLocation());
1226  CD->setIvarLBraceLoc(ReadSourceLocation());
1227  CD->setIvarRBraceLoc(ReadSourceLocation());
1228 
1229  // Note that this category has been deserialized. We do this before
1230  // deserializing the interface declaration, so that it will consider this
1231  /// category.
1232  Reader.CategoriesDeserialized.insert(CD);
1233 
1234  CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1235  CD->TypeParamList = ReadObjCTypeParamList();
1236  unsigned NumProtoRefs = Record.readInt();
1238  ProtoRefs.reserve(NumProtoRefs);
1239  for (unsigned I = 0; I != NumProtoRefs; ++I)
1240  ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1242  ProtoLocs.reserve(NumProtoRefs);
1243  for (unsigned I = 0; I != NumProtoRefs; ++I)
1244  ProtoLocs.push_back(ReadSourceLocation());
1245  CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1246  Reader.getContext());
1247 
1248  // Protocols in the class extension belong to the class.
1249  if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1250  CD->ClassInterface->mergeClassExtensionProtocolList(
1251  (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1252  Reader.getContext());
1253 }
1254 
1256  VisitNamedDecl(CAD);
1257  CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1258 }
1259 
1261  VisitNamedDecl(D);
1262  D->setAtLoc(ReadSourceLocation());
1263  D->setLParenLoc(ReadSourceLocation());
1264  QualType T = Record.readType();
1265  TypeSourceInfo *TSI = GetTypeSourceInfo();
1266  D->setType(T, TSI);
1268  (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1270  (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1272  (ObjCPropertyDecl::PropertyControl)Record.readInt());
1273  DeclarationName GetterName = Record.readDeclarationName();
1274  SourceLocation GetterLoc = ReadSourceLocation();
1275  D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1276  DeclarationName SetterName = Record.readDeclarationName();
1277  SourceLocation SetterLoc = ReadSourceLocation();
1278  D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1279  D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1280  D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1281  D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1282 }
1283 
1285  VisitObjCContainerDecl(D);
1286  D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1287 }
1288 
1290  VisitObjCImplDecl(D);
1291  D->CategoryNameLoc = ReadSourceLocation();
1292 }
1293 
1295  VisitObjCImplDecl(D);
1296  D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1297  D->SuperLoc = ReadSourceLocation();
1298  D->setIvarLBraceLoc(ReadSourceLocation());
1299  D->setIvarRBraceLoc(ReadSourceLocation());
1300  D->setHasNonZeroConstructors(Record.readInt());
1301  D->setHasDestructors(Record.readInt());
1302  D->NumIvarInitializers = Record.readInt();
1303  if (D->NumIvarInitializers)
1304  D->IvarInitializers = ReadGlobalOffset();
1305 }
1306 
1308  VisitDecl(D);
1309  D->setAtLoc(ReadSourceLocation());
1310  D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1311  D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1312  D->IvarLoc = ReadSourceLocation();
1313  D->setGetterCXXConstructor(Record.readExpr());
1314  D->setSetterCXXAssignment(Record.readExpr());
1315 }
1316 
1318  VisitDeclaratorDecl(FD);
1319  FD->Mutable = Record.readInt();
1320 
1321  if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1322  FD->InitStorage.setInt(ISK);
1323  FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1324  ? Record.readType().getAsOpaquePtr()
1325  : Record.readExpr());
1326  }
1327 
1328  if (auto *BW = Record.readExpr())
1329  FD->setBitWidth(BW);
1330 
1331  if (!FD->getDeclName()) {
1332  if (auto *Tmpl = ReadDeclAs<FieldDecl>())
1333  Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1334  }
1335  mergeMergeable(FD);
1336 }
1337 
1339  VisitDeclaratorDecl(PD);
1340  PD->GetterId = Record.getIdentifierInfo();
1341  PD->SetterId = Record.getIdentifierInfo();
1342 }
1343 
1345  VisitValueDecl(FD);
1346 
1347  FD->ChainingSize = Record.readInt();
1348  assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1349  FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1350 
1351  for (unsigned I = 0; I != FD->ChainingSize; ++I)
1352  FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1353 
1354  mergeMergeable(FD);
1355 }
1356 
1357 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1358  RedeclarableResult Redecl = VisitRedeclarable(VD);
1359  VisitDeclaratorDecl(VD);
1360 
1361  VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1362  VD->VarDeclBits.TSCSpec = Record.readInt();
1363  VD->VarDeclBits.InitStyle = Record.readInt();
1364  VD->VarDeclBits.ARCPseudoStrong = Record.readInt();
1365  if (!isa<ParmVarDecl>(VD)) {
1366  VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1367  Record.readInt();
1368  VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1369  VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1370  VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1371  VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1372  VD->NonParmVarDeclBits.IsInline = Record.readInt();
1373  VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1374  VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1375  VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1376  VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1377  VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1378  VD->NonParmVarDeclBits.EscapingByref = Record.readInt();
1379  }
1380  auto VarLinkage = Linkage(Record.readInt());
1381  VD->setCachedLinkage(VarLinkage);
1382 
1383  // Reconstruct the one piece of the IdentifierNamespace that we need.
1384  if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1386  VD->setLocalExternDecl();
1387 
1388  if (uint64_t Val = Record.readInt()) {
1389  VD->setInit(Record.readExpr());
1390  if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1391  EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1392  Eval->CheckedICE = true;
1393  Eval->IsICE = Val == 3;
1394  }
1395  }
1396 
1397  if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1398  Expr *CopyExpr = Record.readExpr();
1399  if (CopyExpr)
1400  Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1401  }
1402 
1403  if (VD->getStorageDuration() == SD_Static && Record.readInt())
1404  Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1405 
1406  enum VarKind {
1407  VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1408  };
1409  switch ((VarKind)Record.readInt()) {
1410  case VarNotTemplate:
1411  // Only true variables (not parameters or implicit parameters) can be
1412  // merged; the other kinds are not really redeclarable at all.
1413  if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1414  !isa<VarTemplateSpecializationDecl>(VD))
1415  mergeRedeclarable(VD, Redecl);
1416  break;
1417  case VarTemplate:
1418  // Merged when we merge the template.
1419  VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1420  break;
1421  case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1422  auto *Tmpl = ReadDeclAs<VarDecl>();
1423  auto TSK = (TemplateSpecializationKind)Record.readInt();
1424  SourceLocation POI = ReadSourceLocation();
1425  Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1426  mergeRedeclarable(VD, Redecl);
1427  break;
1428  }
1429  }
1430 
1431  return Redecl;
1432 }
1433 
1435  VisitVarDecl(PD);
1436 }
1437 
1439  VisitVarDecl(PD);
1440  unsigned isObjCMethodParam = Record.readInt();
1441  unsigned scopeDepth = Record.readInt();
1442  unsigned scopeIndex = Record.readInt();
1443  unsigned declQualifier = Record.readInt();
1444  if (isObjCMethodParam) {
1445  assert(scopeDepth == 0);
1446  PD->setObjCMethodScopeInfo(scopeIndex);
1447  PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1448  } else {
1449  PD->setScopeInfo(scopeDepth, scopeIndex);
1450  }
1451  PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1452  PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1453  if (Record.readInt()) // hasUninstantiatedDefaultArg.
1454  PD->setUninstantiatedDefaultArg(Record.readExpr());
1455 
1456  // FIXME: If this is a redeclaration of a function from another module, handle
1457  // inheritance of default arguments.
1458 }
1459 
1461  VisitVarDecl(DD);
1462  auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1463  for (unsigned I = 0; I != DD->NumBindings; ++I) {
1464  BDs[I] = ReadDeclAs<BindingDecl>();
1465  BDs[I]->setDecomposedDecl(DD);
1466  }
1467 }
1468 
1470  VisitValueDecl(BD);
1471  BD->Binding = Record.readExpr();
1472 }
1473 
1475  VisitDecl(AD);
1476  AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1477  AD->setRParenLoc(ReadSourceLocation());
1478 }
1479 
1481  VisitDecl(BD);
1482  BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1483  BD->setSignatureAsWritten(GetTypeSourceInfo());
1484  unsigned NumParams = Record.readInt();
1486  Params.reserve(NumParams);
1487  for (unsigned I = 0; I != NumParams; ++I)
1488  Params.push_back(ReadDeclAs<ParmVarDecl>());
1489  BD->setParams(Params);
1490 
1491  BD->setIsVariadic(Record.readInt());
1492  BD->setBlockMissingReturnType(Record.readInt());
1493  BD->setIsConversionFromLambda(Record.readInt());
1494  BD->setDoesNotEscape(Record.readInt());
1495  BD->setCanAvoidCopyToHeap(Record.readInt());
1496 
1497  bool capturesCXXThis = Record.readInt();
1498  unsigned numCaptures = Record.readInt();
1500  captures.reserve(numCaptures);
1501  for (unsigned i = 0; i != numCaptures; ++i) {
1502  auto *decl = ReadDeclAs<VarDecl>();
1503  unsigned flags = Record.readInt();
1504  bool byRef = (flags & 1);
1505  bool nested = (flags & 2);
1506  Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1507 
1508  captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1509  }
1510  BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1511 }
1512 
1514  VisitDecl(CD);
1515  unsigned ContextParamPos = Record.readInt();
1516  CD->setNothrow(Record.readInt() != 0);
1517  // Body is set by VisitCapturedStmt.
1518  for (unsigned I = 0; I < CD->NumParams; ++I) {
1519  if (I != ContextParamPos)
1520  CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1521  else
1522  CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1523  }
1524 }
1525 
1527  VisitDecl(D);
1528  D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1529  D->setExternLoc(ReadSourceLocation());
1530  D->setRBraceLoc(ReadSourceLocation());
1531 }
1532 
1534  VisitDecl(D);
1535  D->RBraceLoc = ReadSourceLocation();
1536 }
1537 
1539  VisitNamedDecl(D);
1540  D->setLocStart(ReadSourceLocation());
1541 }
1542 
1544  RedeclarableResult Redecl = VisitRedeclarable(D);
1545  VisitNamedDecl(D);
1546  D->setInline(Record.readInt());
1547  D->LocStart = ReadSourceLocation();
1548  D->RBraceLoc = ReadSourceLocation();
1549 
1550  // Defer loading the anonymous namespace until we've finished merging
1551  // this namespace; loading it might load a later declaration of the
1552  // same namespace, and we have an invariant that older declarations
1553  // get merged before newer ones try to merge.
1554  GlobalDeclID AnonNamespace = 0;
1555  if (Redecl.getFirstID() == ThisDeclID) {
1556  AnonNamespace = ReadDeclID();
1557  } else {
1558  // Link this namespace back to the first declaration, which has already
1559  // been deserialized.
1560  D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1561  }
1562 
1563  mergeRedeclarable(D, Redecl);
1564 
1565  if (AnonNamespace) {
1566  // Each module has its own anonymous namespace, which is disjoint from
1567  // any other module's anonymous namespaces, so don't attach the anonymous
1568  // namespace at all.
1569  auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1570  if (!Record.isModule())
1571  D->setAnonymousNamespace(Anon);
1572  }
1573 }
1574 
1576  RedeclarableResult Redecl = VisitRedeclarable(D);
1577  VisitNamedDecl(D);
1578  D->NamespaceLoc = ReadSourceLocation();
1579  D->IdentLoc = ReadSourceLocation();
1580  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1581  D->Namespace = ReadDeclAs<NamedDecl>();
1582  mergeRedeclarable(D, Redecl);
1583 }
1584 
1586  VisitNamedDecl(D);
1587  D->setUsingLoc(ReadSourceLocation());
1588  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1589  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1590  D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1591  D->setTypename(Record.readInt());
1592  if (auto *Pattern = ReadDeclAs<NamedDecl>())
1593  Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1594  mergeMergeable(D);
1595 }
1596 
1598  VisitNamedDecl(D);
1599  D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1600  auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1601  for (unsigned I = 0; I != D->NumExpansions; ++I)
1602  Expansions[I] = ReadDeclAs<NamedDecl>();
1603  mergeMergeable(D);
1604 }
1605 
1607  RedeclarableResult Redecl = VisitRedeclarable(D);
1608  VisitNamedDecl(D);
1609  D->Underlying = ReadDeclAs<NamedDecl>();
1610  D->IdentifierNamespace = Record.readInt();
1611  D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1612  auto *Pattern = ReadDeclAs<UsingShadowDecl>();
1613  if (Pattern)
1614  Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1615  mergeRedeclarable(D, Redecl);
1616 }
1617 
1620  VisitUsingShadowDecl(D);
1621  D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1622  D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1623  D->IsVirtual = Record.readInt();
1624 }
1625 
1627  VisitNamedDecl(D);
1628  D->UsingLoc = ReadSourceLocation();
1629  D->NamespaceLoc = ReadSourceLocation();
1630  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1631  D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1632  D->CommonAncestor = ReadDeclAs<DeclContext>();
1633 }
1634 
1636  VisitValueDecl(D);
1637  D->setUsingLoc(ReadSourceLocation());
1638  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1639  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1640  D->EllipsisLoc = ReadSourceLocation();
1641  mergeMergeable(D);
1642 }
1643 
1646  VisitTypeDecl(D);
1647  D->TypenameLocation = ReadSourceLocation();
1648  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1649  D->EllipsisLoc = ReadSourceLocation();
1650  mergeMergeable(D);
1651 }
1652 
1653 void ASTDeclReader::ReadCXXDefinitionData(
1654  struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1655  // Note: the caller has deserialized the IsLambda bit already.
1656  Data.UserDeclaredConstructor = Record.readInt();
1657  Data.UserDeclaredSpecialMembers = Record.readInt();
1658  Data.Aggregate = Record.readInt();
1659  Data.PlainOldData = Record.readInt();
1660  Data.Empty = Record.readInt();
1661  Data.Polymorphic = Record.readInt();
1662  Data.Abstract = Record.readInt();
1663  Data.IsStandardLayout = Record.readInt();
1664  Data.IsCXX11StandardLayout = Record.readInt();
1665  Data.HasBasesWithFields = Record.readInt();
1666  Data.HasBasesWithNonStaticDataMembers = Record.readInt();
1667  Data.HasPrivateFields = Record.readInt();
1668  Data.HasProtectedFields = Record.readInt();
1669  Data.HasPublicFields = Record.readInt();
1670  Data.HasMutableFields = Record.readInt();
1671  Data.HasVariantMembers = Record.readInt();
1672  Data.HasOnlyCMembers = Record.readInt();
1673  Data.HasInClassInitializer = Record.readInt();
1674  Data.HasUninitializedReferenceMember = Record.readInt();
1675  Data.HasUninitializedFields = Record.readInt();
1676  Data.HasInheritedConstructor = Record.readInt();
1677  Data.HasInheritedAssignment = Record.readInt();
1678  Data.NeedOverloadResolutionForCopyConstructor = Record.readInt();
1679  Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1680  Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1681  Data.NeedOverloadResolutionForDestructor = Record.readInt();
1682  Data.DefaultedCopyConstructorIsDeleted = Record.readInt();
1683  Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1684  Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1685  Data.DefaultedDestructorIsDeleted = Record.readInt();
1686  Data.HasTrivialSpecialMembers = Record.readInt();
1687  Data.HasTrivialSpecialMembersForCall = Record.readInt();
1688  Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1689  Data.DeclaredNonTrivialSpecialMembersForCall = Record.readInt();
1690  Data.HasIrrelevantDestructor = Record.readInt();
1691  Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1692  Data.HasDefaultedDefaultConstructor = Record.readInt();
1693  Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1694  Data.HasConstexprDefaultConstructor = Record.readInt();
1695  Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1696  Data.ComputedVisibleConversions = Record.readInt();
1697  Data.UserProvidedDefaultConstructor = Record.readInt();
1698  Data.DeclaredSpecialMembers = Record.readInt();
1699  Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1700  Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1701  Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1702  Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1703  Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1704  Data.ODRHash = Record.readInt();
1705  Data.HasODRHash = true;
1706 
1707  if (Record.readInt())
1708  Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1709 
1710  Data.NumBases = Record.readInt();
1711  if (Data.NumBases)
1712  Data.Bases = ReadGlobalOffset();
1713  Data.NumVBases = Record.readInt();
1714  if (Data.NumVBases)
1715  Data.VBases = ReadGlobalOffset();
1716 
1717  Record.readUnresolvedSet(Data.Conversions);
1718  Record.readUnresolvedSet(Data.VisibleConversions);
1719  assert(Data.Definition && "Data.Definition should be already set!");
1720  Data.FirstFriend = ReadDeclID();
1721 
1722  if (Data.IsLambda) {
1723  using Capture = LambdaCapture;
1724 
1725  auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1726  Lambda.Dependent = Record.readInt();
1727  Lambda.IsGenericLambda = Record.readInt();
1728  Lambda.CaptureDefault = Record.readInt();
1729  Lambda.NumCaptures = Record.readInt();
1730  Lambda.NumExplicitCaptures = Record.readInt();
1731  Lambda.ManglingNumber = Record.readInt();
1732  Lambda.ContextDecl = ReadDeclID();
1733  Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1734  sizeof(Capture) * Lambda.NumCaptures);
1735  Capture *ToCapture = Lambda.Captures;
1736  Lambda.MethodTyInfo = GetTypeSourceInfo();
1737  for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1738  SourceLocation Loc = ReadSourceLocation();
1739  bool IsImplicit = Record.readInt();
1740  auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1741  switch (Kind) {
1742  case LCK_StarThis:
1743  case LCK_This:
1744  case LCK_VLAType:
1745  *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1746  break;
1747  case LCK_ByCopy:
1748  case LCK_ByRef:
1749  auto *Var = ReadDeclAs<VarDecl>();
1750  SourceLocation EllipsisLoc = ReadSourceLocation();
1751  *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1752  break;
1753  }
1754  }
1755  }
1756 }
1757 
1758 void ASTDeclReader::MergeDefinitionData(
1759  CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1760  assert(D->DefinitionData &&
1761  "merging class definition into non-definition");
1762  auto &DD = *D->DefinitionData;
1763 
1764  if (DD.Definition != MergeDD.Definition) {
1765  // Track that we merged the definitions.
1766  Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1767  DD.Definition));
1768  Reader.PendingDefinitions.erase(MergeDD.Definition);
1769  MergeDD.Definition->setCompleteDefinition(false);
1770  Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1771  assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1772  "already loaded pending lookups for merged definition");
1773  }
1774 
1775  auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1776  if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1777  PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1778  // We faked up this definition data because we found a class for which we'd
1779  // not yet loaded the definition. Replace it with the real thing now.
1780  assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1781  PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1782 
1783  // Don't change which declaration is the definition; that is required
1784  // to be invariant once we select it.
1785  auto *Def = DD.Definition;
1786  DD = std::move(MergeDD);
1787  DD.Definition = Def;
1788  return;
1789  }
1790 
1791  // FIXME: Move this out into a .def file?
1792  bool DetectedOdrViolation = false;
1793 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1794 #define MATCH_FIELD(Field) \
1795  DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1796  OR_FIELD(Field)
1797  MATCH_FIELD(UserDeclaredConstructor)
1798  MATCH_FIELD(UserDeclaredSpecialMembers)
1799  MATCH_FIELD(Aggregate)
1800  MATCH_FIELD(PlainOldData)
1801  MATCH_FIELD(Empty)
1802  MATCH_FIELD(Polymorphic)
1803  MATCH_FIELD(Abstract)
1804  MATCH_FIELD(IsStandardLayout)
1805  MATCH_FIELD(IsCXX11StandardLayout)
1806  MATCH_FIELD(HasBasesWithFields)
1807  MATCH_FIELD(HasBasesWithNonStaticDataMembers)
1808  MATCH_FIELD(HasPrivateFields)
1809  MATCH_FIELD(HasProtectedFields)
1810  MATCH_FIELD(HasPublicFields)
1811  MATCH_FIELD(HasMutableFields)
1812  MATCH_FIELD(HasVariantMembers)
1813  MATCH_FIELD(HasOnlyCMembers)
1814  MATCH_FIELD(HasInClassInitializer)
1815  MATCH_FIELD(HasUninitializedReferenceMember)
1816  MATCH_FIELD(HasUninitializedFields)
1817  MATCH_FIELD(HasInheritedConstructor)
1818  MATCH_FIELD(HasInheritedAssignment)
1819  MATCH_FIELD(NeedOverloadResolutionForCopyConstructor)
1820  MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1821  MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1822  MATCH_FIELD(NeedOverloadResolutionForDestructor)
1823  MATCH_FIELD(DefaultedCopyConstructorIsDeleted)
1824  MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1825  MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1826  MATCH_FIELD(DefaultedDestructorIsDeleted)
1827  OR_FIELD(HasTrivialSpecialMembers)
1828  OR_FIELD(HasTrivialSpecialMembersForCall)
1829  OR_FIELD(DeclaredNonTrivialSpecialMembers)
1830  OR_FIELD(DeclaredNonTrivialSpecialMembersForCall)
1831  MATCH_FIELD(HasIrrelevantDestructor)
1832  OR_FIELD(HasConstexprNonCopyMoveConstructor)
1833  OR_FIELD(HasDefaultedDefaultConstructor)
1834  MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1835  OR_FIELD(HasConstexprDefaultConstructor)
1836  MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1837  // ComputedVisibleConversions is handled below.
1838  MATCH_FIELD(UserProvidedDefaultConstructor)
1839  OR_FIELD(DeclaredSpecialMembers)
1840  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1841  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1842  MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1843  OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1844  OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1845  MATCH_FIELD(IsLambda)
1846 #undef OR_FIELD
1847 #undef MATCH_FIELD
1848 
1849  if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1850  DetectedOdrViolation = true;
1851  // FIXME: Issue a diagnostic if the base classes don't match when we come
1852  // to lazily load them.
1853 
1854  // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1855  // match when we come to lazily load them.
1856  if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1857  DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1858  DD.ComputedVisibleConversions = true;
1859  }
1860 
1861  // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1862  // lazily load it.
1863 
1864  if (DD.IsLambda) {
1865  // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1866  // when they occur within the body of a function template specialization).
1867  }
1868 
1869  if (D->getODRHash() != MergeDD.ODRHash) {
1870  DetectedOdrViolation = true;
1871  }
1872 
1873  if (DetectedOdrViolation)
1874  Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1875  {MergeDD.Definition, &MergeDD});
1876 }
1877 
1878 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1879  struct CXXRecordDecl::DefinitionData *DD;
1880  ASTContext &C = Reader.getContext();
1881 
1882  // Determine whether this is a lambda closure type, so that we can
1883  // allocate the appropriate DefinitionData structure.
1884  bool IsLambda = Record.readInt();
1885  if (IsLambda)
1886  DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1887  LCD_None);
1888  else
1889  DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1890 
1891  CXXRecordDecl *Canon = D->getCanonicalDecl();
1892  // Set decl definition data before reading it, so that during deserialization
1893  // when we read CXXRecordDecl, it already has definition data and we don't
1894  // set fake one.
1895  if (!Canon->DefinitionData)
1896  Canon->DefinitionData = DD;
1897  D->DefinitionData = Canon->DefinitionData;
1898  ReadCXXDefinitionData(*DD, D);
1899 
1900  // We might already have a different definition for this record. This can
1901  // happen either because we're reading an update record, or because we've
1902  // already done some merging. Either way, just merge into it.
1903  if (Canon->DefinitionData != DD) {
1904  MergeDefinitionData(Canon, std::move(*DD));
1905  return;
1906  }
1907 
1908  // Mark this declaration as being a definition.
1909  D->setCompleteDefinition(true);
1910 
1911  // If this is not the first declaration or is an update record, we can have
1912  // other redeclarations already. Make a note that we need to propagate the
1913  // DefinitionData pointer onto them.
1914  if (Update || Canon != D)
1915  Reader.PendingDefinitions.insert(D);
1916 }
1917 
1918 ASTDeclReader::RedeclarableResult
1920  RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1921 
1922  ASTContext &C = Reader.getContext();
1923 
1924  enum CXXRecKind {
1925  CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1926  };
1927  switch ((CXXRecKind)Record.readInt()) {
1928  case CXXRecNotTemplate:
1929  // Merged when we merge the folding set entry in the primary template.
1930  if (!isa<ClassTemplateSpecializationDecl>(D))
1931  mergeRedeclarable(D, Redecl);
1932  break;
1933  case CXXRecTemplate: {
1934  // Merged when we merge the template.
1935  auto *Template = ReadDeclAs<ClassTemplateDecl>();
1936  D->TemplateOrInstantiation = Template;
1937  if (!Template->getTemplatedDecl()) {
1938  // We've not actually loaded the ClassTemplateDecl yet, because we're
1939  // currently being loaded as its pattern. Rely on it to set up our
1940  // TypeForDecl (see VisitClassTemplateDecl).
1941  //
1942  // Beware: we do not yet know our canonical declaration, and may still
1943  // get merged once the surrounding class template has got off the ground.
1944  DeferredTypeID = 0;
1945  }
1946  break;
1947  }
1948  case CXXRecMemberSpecialization: {
1949  auto *RD = ReadDeclAs<CXXRecordDecl>();
1950  auto TSK = (TemplateSpecializationKind)Record.readInt();
1951  SourceLocation POI = ReadSourceLocation();
1952  MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1953  MSI->setPointOfInstantiation(POI);
1954  D->TemplateOrInstantiation = MSI;
1955  mergeRedeclarable(D, Redecl);
1956  break;
1957  }
1958  }
1959 
1960  bool WasDefinition = Record.readInt();
1961  if (WasDefinition)
1962  ReadCXXRecordDefinition(D, /*Update*/false);
1963  else
1964  // Propagate DefinitionData pointer from the canonical declaration.
1965  D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1966 
1967  // Lazily load the key function to avoid deserializing every method so we can
1968  // compute it.
1969  if (WasDefinition) {
1970  DeclID KeyFn = ReadDeclID();
1971  if (KeyFn && D->isCompleteDefinition())
1972  // FIXME: This is wrong for the ARM ABI, where some other module may have
1973  // made this function no longer be a key function. We need an update
1974  // record or similar for that case.
1975  C.KeyFunctions[D] = KeyFn;
1976  }
1977 
1978  return Redecl;
1979 }
1980 
1982  D->setExplicitSpecifier(Record.readExplicitSpec());
1983  VisitFunctionDecl(D);
1984  D->setIsCopyDeductionCandidate(Record.readInt());
1985 }
1986 
1988  VisitFunctionDecl(D);
1989 
1990  unsigned NumOverridenMethods = Record.readInt();
1991  if (D->isCanonicalDecl()) {
1992  while (NumOverridenMethods--) {
1993  // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1994  // MD may be initializing.
1995  if (auto *MD = ReadDeclAs<CXXMethodDecl>())
1996  Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1997  }
1998  } else {
1999  // We don't care about which declarations this used to override; we get
2000  // the relevant information from the canonical declaration.
2001  Record.skipInts(NumOverridenMethods);
2002  }
2003 }
2004 
2006  // We need the inherited constructor information to merge the declaration,
2007  // so we have to read it before we call VisitCXXMethodDecl.
2008  D->setExplicitSpecifier(Record.readExplicitSpec());
2009  if (D->isInheritingConstructor()) {
2010  auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
2011  auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
2012  *D->getTrailingObjects<InheritedConstructor>() =
2013  InheritedConstructor(Shadow, Ctor);
2014  }
2015 
2016  VisitCXXMethodDecl(D);
2017 }
2018 
2020  VisitCXXMethodDecl(D);
2021 
2022  if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
2023  CXXDestructorDecl *Canon = D->getCanonicalDecl();
2024  auto *ThisArg = Record.readExpr();
2025  // FIXME: Check consistency if we have an old and new operator delete.
2026  if (!Canon->OperatorDelete) {
2027  Canon->OperatorDelete = OperatorDelete;
2028  Canon->OperatorDeleteThisArg = ThisArg;
2029  }
2030  }
2031 }
2032 
2034  D->setExplicitSpecifier(Record.readExplicitSpec());
2035  VisitCXXMethodDecl(D);
2036 }
2037 
2039  VisitDecl(D);
2040  D->ImportedAndComplete.setPointer(readModule());
2041  D->ImportedAndComplete.setInt(Record.readInt());
2042  auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
2043  for (unsigned I = 0, N = Record.back(); I != N; ++I)
2044  StoredLocs[I] = ReadSourceLocation();
2045  Record.skipInts(1); // The number of stored source locations.
2046 }
2047 
2049  VisitDecl(D);
2050  D->setColonLoc(ReadSourceLocation());
2051 }
2052 
2054  VisitDecl(D);
2055  if (Record.readInt()) // hasFriendDecl
2056  D->Friend = ReadDeclAs<NamedDecl>();
2057  else
2058  D->Friend = GetTypeSourceInfo();
2059  for (unsigned i = 0; i != D->NumTPLists; ++i)
2060  D->getTrailingObjects<TemplateParameterList *>()[i] =
2061  Record.readTemplateParameterList();
2062  D->NextFriend = ReadDeclID();
2063  D->UnsupportedFriend = (Record.readInt() != 0);
2064  D->FriendLoc = ReadSourceLocation();
2065 }
2066 
2068  VisitDecl(D);
2069  unsigned NumParams = Record.readInt();
2070  D->NumParams = NumParams;
2071  D->Params = new TemplateParameterList*[NumParams];
2072  for (unsigned i = 0; i != NumParams; ++i)
2073  D->Params[i] = Record.readTemplateParameterList();
2074  if (Record.readInt()) // HasFriendDecl
2075  D->Friend = ReadDeclAs<NamedDecl>();
2076  else
2077  D->Friend = GetTypeSourceInfo();
2078  D->FriendLoc = ReadSourceLocation();
2079 }
2080 
2082  VisitNamedDecl(D);
2083 
2084  DeclID PatternID = ReadDeclID();
2085  auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2086  TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2087  // FIXME handle associated constraints
2088  D->init(TemplatedDecl, TemplateParams);
2089 
2090  return PatternID;
2091 }
2092 
2094  VisitTemplateDecl(D);
2095  D->ConstraintExpr = Record.readExpr();
2096  mergeMergeable(D);
2097 }
2098 
2099 ASTDeclReader::RedeclarableResult
2101  RedeclarableResult Redecl = VisitRedeclarable(D);
2102 
2103  // Make sure we've allocated the Common pointer first. We do this before
2104  // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2106  if (!CanonD->Common) {
2107  CanonD->Common = CanonD->newCommon(Reader.getContext());
2108  Reader.PendingDefinitions.insert(CanonD);
2109  }
2110  D->Common = CanonD->Common;
2111 
2112  // If this is the first declaration of the template, fill in the information
2113  // for the 'common' pointer.
2114  if (ThisDeclID == Redecl.getFirstID()) {
2115  if (auto *RTD = ReadDeclAs<RedeclarableTemplateDecl>()) {
2116  assert(RTD->getKind() == D->getKind() &&
2117  "InstantiatedFromMemberTemplate kind mismatch");
2119  if (Record.readInt())
2121  }
2122  }
2123 
2124  DeclID PatternID = VisitTemplateDecl(D);
2125  D->IdentifierNamespace = Record.readInt();
2126 
2127  mergeRedeclarable(D, Redecl, PatternID);
2128 
2129  // If we merged the template with a prior declaration chain, merge the common
2130  // pointer.
2131  // FIXME: Actually merge here, don't just overwrite.
2132  D->Common = D->getCanonicalDecl()->Common;
2133 
2134  return Redecl;
2135 }
2136 
2138  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2139 
2140  if (ThisDeclID == Redecl.getFirstID()) {
2141  // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2142  // the specializations.
2144  ReadDeclIDList(SpecIDs);
2146  }
2147 
2148  if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2149  // We were loaded before our templated declaration was. We've not set up
2150  // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2151  // it now.
2152  Reader.getContext().getInjectedClassNameType(
2154  }
2155 }
2156 
2158  llvm_unreachable("BuiltinTemplates are not serialized");
2159 }
2160 
2161 /// TODO: Unify with ClassTemplateDecl version?
2162 /// May require unifying ClassTemplateDecl and
2163 /// VarTemplateDecl beyond TemplateDecl...
2165  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2166 
2167  if (ThisDeclID == Redecl.getFirstID()) {
2168  // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2169  // the specializations.
2171  ReadDeclIDList(SpecIDs);
2173  }
2174 }
2175 
2176 ASTDeclReader::RedeclarableResult
2179  RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2180 
2181  ASTContext &C = Reader.getContext();
2182  if (Decl *InstD = ReadDecl()) {
2183  if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2184  D->SpecializedTemplate = CTD;
2185  } else {
2187  Record.readTemplateArgumentList(TemplArgs);
2188  TemplateArgumentList *ArgList
2189  = TemplateArgumentList::CreateCopy(C, TemplArgs);
2190  auto *PS =
2192  SpecializedPartialSpecialization();
2193  PS->PartialSpecialization
2194  = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2195  PS->TemplateArgs = ArgList;
2196  D->SpecializedTemplate = PS;
2197  }
2198  }
2199 
2201  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2202  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2203  D->PointOfInstantiation = ReadSourceLocation();
2204  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2205 
2206  bool writtenAsCanonicalDecl = Record.readInt();
2207  if (writtenAsCanonicalDecl) {
2208  auto *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2209  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2210  // Set this as, or find, the canonical declaration for this specialization
2212  if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2213  CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2214  .GetOrInsertNode(Partial);
2215  } else {
2216  CanonSpec =
2217  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2218  }
2219  // If there was already a canonical specialization, merge into it.
2220  if (CanonSpec != D) {
2221  mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2222 
2223  // This declaration might be a definition. Merge with any existing
2224  // definition.
2225  if (auto *DDD = D->DefinitionData) {
2226  if (CanonSpec->DefinitionData)
2227  MergeDefinitionData(CanonSpec, std::move(*DDD));
2228  else
2229  CanonSpec->DefinitionData = D->DefinitionData;
2230  }
2231  D->DefinitionData = CanonSpec->DefinitionData;
2232  }
2233  }
2234  }
2235 
2236  // Explicit info.
2237  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2238  auto *ExplicitInfo =
2239  new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2240  ExplicitInfo->TypeAsWritten = TyInfo;
2241  ExplicitInfo->ExternLoc = ReadSourceLocation();
2242  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2243  D->ExplicitInfo = ExplicitInfo;
2244  }
2245 
2246  return Redecl;
2247 }
2248 
2251  RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2252 
2253  D->TemplateParams = Record.readTemplateParameterList();
2254  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2255 
2256  // These are read/set from/to the first declaration.
2257  if (ThisDeclID == Redecl.getFirstID()) {
2258  D->InstantiatedFromMember.setPointer(
2259  ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2260  D->InstantiatedFromMember.setInt(Record.readInt());
2261  }
2262 }
2263 
2266  VisitDecl(D);
2267  D->Specialization = ReadDeclAs<CXXMethodDecl>();
2268  if (Record.readInt())
2269  D->TemplateArgs = Record.readASTTemplateArgumentListInfo();
2270 }
2271 
2273  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2274 
2275  if (ThisDeclID == Redecl.getFirstID()) {
2276  // This FunctionTemplateDecl owns a CommonPtr; read it.
2278  ReadDeclIDList(SpecIDs);
2280  }
2281 }
2282 
2283 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2284 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2285 /// VarTemplate(Partial)SpecializationDecl with a new data
2286 /// structure Template(Partial)SpecializationDecl, and
2287 /// using Template(Partial)SpecializationDecl as input type.
2288 ASTDeclReader::RedeclarableResult
2291  RedeclarableResult Redecl = VisitVarDeclImpl(D);
2292 
2293  ASTContext &C = Reader.getContext();
2294  if (Decl *InstD = ReadDecl()) {
2295  if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2296  D->SpecializedTemplate = VTD;
2297  } else {
2299  Record.readTemplateArgumentList(TemplArgs);
2301  C, TemplArgs);
2302  auto *PS =
2303  new (C)
2304  VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2305  PS->PartialSpecialization =
2306  cast<VarTemplatePartialSpecializationDecl>(InstD);
2307  PS->TemplateArgs = ArgList;
2308  D->SpecializedTemplate = PS;
2309  }
2310  }
2311 
2312  // Explicit info.
2313  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2314  auto *ExplicitInfo =
2315  new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2316  ExplicitInfo->TypeAsWritten = TyInfo;
2317  ExplicitInfo->ExternLoc = ReadSourceLocation();
2318  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2319  D->ExplicitInfo = ExplicitInfo;
2320  }
2321 
2323  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2324  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2325  D->PointOfInstantiation = ReadSourceLocation();
2326  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2327  D->IsCompleteDefinition = Record.readInt();
2328 
2329  bool writtenAsCanonicalDecl = Record.readInt();
2330  if (writtenAsCanonicalDecl) {
2331  auto *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2332  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2333  // FIXME: If it's already present, merge it.
2334  if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2335  CanonPattern->getCommonPtr()->PartialSpecializations
2336  .GetOrInsertNode(Partial);
2337  } else {
2338  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2339  }
2340  }
2341  }
2342 
2343  return Redecl;
2344 }
2345 
2346 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2347 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2348 /// VarTemplate(Partial)SpecializationDecl with a new data
2349 /// structure Template(Partial)SpecializationDecl, and
2350 /// using Template(Partial)SpecializationDecl as input type.
2353  RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2354 
2355  D->TemplateParams = Record.readTemplateParameterList();
2356  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2357 
2358  // These are read/set from/to the first declaration.
2359  if (ThisDeclID == Redecl.getFirstID()) {
2360  D->InstantiatedFromMember.setPointer(
2361  ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2362  D->InstantiatedFromMember.setInt(Record.readInt());
2363  }
2364 }
2365 
2367  VisitTypeDecl(D);
2368 
2369  D->setDeclaredWithTypename(Record.readInt());
2370 
2371  if (Record.readInt())
2372  D->setDefaultArgument(GetTypeSourceInfo());
2373 }
2374 
2376  VisitDeclaratorDecl(D);
2377  // TemplateParmPosition.
2378  D->setDepth(Record.readInt());
2379  D->setPosition(Record.readInt());
2380  if (D->isExpandedParameterPack()) {
2381  auto TypesAndInfos =
2382  D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2383  for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2384  new (&TypesAndInfos[I].first) QualType(Record.readType());
2385  TypesAndInfos[I].second = GetTypeSourceInfo();
2386  }
2387  } else {
2388  // Rest of NonTypeTemplateParmDecl.
2389  D->ParameterPack = Record.readInt();
2390  if (Record.readInt())
2391  D->setDefaultArgument(Record.readExpr());
2392  }
2393 }
2394 
2396  VisitTemplateDecl(D);
2397  // TemplateParmPosition.
2398  D->setDepth(Record.readInt());
2399  D->setPosition(Record.readInt());
2400  if (D->isExpandedParameterPack()) {
2401  auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2402  for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2403  I != N; ++I)
2404  Data[I] = Record.readTemplateParameterList();
2405  } else {
2406  // Rest of TemplateTemplateParmDecl.
2407  D->ParameterPack = Record.readInt();
2408  if (Record.readInt())
2409  D->setDefaultArgument(Reader.getContext(),
2410  Record.readTemplateArgumentLoc());
2411  }
2412 }
2413 
2415  VisitRedeclarableTemplateDecl(D);
2416 }
2417 
2419  VisitDecl(D);
2420  D->AssertExprAndFailed.setPointer(Record.readExpr());
2421  D->AssertExprAndFailed.setInt(Record.readInt());
2422  D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2423  D->RParenLoc = ReadSourceLocation();
2424 }
2425 
2427  VisitDecl(D);
2428 }
2429 
2430 std::pair<uint64_t, uint64_t>
2432  uint64_t LexicalOffset = ReadLocalOffset();
2433  uint64_t VisibleOffset = ReadLocalOffset();
2434  return std::make_pair(LexicalOffset, VisibleOffset);
2435 }
2436 
2437 template <typename T>
2438 ASTDeclReader::RedeclarableResult
2440  DeclID FirstDeclID = ReadDeclID();
2441  Decl *MergeWith = nullptr;
2442 
2443  bool IsKeyDecl = ThisDeclID == FirstDeclID;
2444  bool IsFirstLocalDecl = false;
2445 
2446  uint64_t RedeclOffset = 0;
2447 
2448  // 0 indicates that this declaration was the only declaration of its entity,
2449  // and is used for space optimization.
2450  if (FirstDeclID == 0) {
2451  FirstDeclID = ThisDeclID;
2452  IsKeyDecl = true;
2453  IsFirstLocalDecl = true;
2454  } else if (unsigned N = Record.readInt()) {
2455  // This declaration was the first local declaration, but may have imported
2456  // other declarations.
2457  IsKeyDecl = N == 1;
2458  IsFirstLocalDecl = true;
2459 
2460  // We have some declarations that must be before us in our redeclaration
2461  // chain. Read them now, and remember that we ought to merge with one of
2462  // them.
2463  // FIXME: Provide a known merge target to the second and subsequent such
2464  // declaration.
2465  for (unsigned I = 0; I != N - 1; ++I)
2466  MergeWith = ReadDecl();
2467 
2468  RedeclOffset = ReadLocalOffset();
2469  } else {
2470  // This declaration was not the first local declaration. Read the first
2471  // local declaration now, to trigger the import of other redeclarations.
2472  (void)ReadDecl();
2473  }
2474 
2475  auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2476  if (FirstDecl != D) {
2477  // We delay loading of the redeclaration chain to avoid deeply nested calls.
2478  // We temporarily set the first (canonical) declaration as the previous one
2479  // which is the one that matters and mark the real previous DeclID to be
2480  // loaded & attached later on.
2482  D->First = FirstDecl->getCanonicalDecl();
2483  }
2484 
2485  auto *DAsT = static_cast<T *>(D);
2486 
2487  // Note that we need to load local redeclarations of this decl and build a
2488  // decl chain for them. This must happen *after* we perform the preloading
2489  // above; this ensures that the redeclaration chain is built in the correct
2490  // order.
2491  if (IsFirstLocalDecl)
2492  Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2493 
2494  return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2495 }
2496 
2497 /// Attempts to merge the given declaration (D) with another declaration
2498 /// of the same entity.
2499 template<typename T>
2501  RedeclarableResult &Redecl,
2502  DeclID TemplatePatternID) {
2503  // If modules are not available, there is no reason to perform this merge.
2504  if (!Reader.getContext().getLangOpts().Modules)
2505  return;
2506 
2507  // If we're not the canonical declaration, we don't need to merge.
2508  if (!DBase->isFirstDecl())
2509  return;
2510 
2511  auto *D = static_cast<T *>(DBase);
2512 
2513  if (auto *Existing = Redecl.getKnownMergeTarget())
2514  // We already know of an existing declaration we should merge with.
2515  mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2516  else if (FindExistingResult ExistingRes = findExisting(D))
2517  if (T *Existing = ExistingRes)
2518  mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2519 }
2520 
2521 /// "Cast" to type T, asserting if we don't have an implicit conversion.
2522 /// We use this to put code in a template that will only be valid for certain
2523 /// instantiations.
2524 template<typename T> static T assert_cast(T t) { return t; }
2525 template<typename T> static T assert_cast(...) {
2526  llvm_unreachable("bad assert_cast");
2527 }
2528 
2529 /// Merge together the pattern declarations from two template
2530 /// declarations.
2532  RedeclarableTemplateDecl *Existing,
2533  DeclID DsID, bool IsKeyDecl) {
2534  auto *DPattern = D->getTemplatedDecl();
2535  auto *ExistingPattern = Existing->getTemplatedDecl();
2536  RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2537  DPattern->getCanonicalDecl()->getGlobalID(),
2538  IsKeyDecl);
2539 
2540  if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2541  // Merge with any existing definition.
2542  // FIXME: This is duplicated in several places. Refactor.
2543  auto *ExistingClass =
2544  cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2545  if (auto *DDD = DClass->DefinitionData) {
2546  if (ExistingClass->DefinitionData) {
2547  MergeDefinitionData(ExistingClass, std::move(*DDD));
2548  } else {
2549  ExistingClass->DefinitionData = DClass->DefinitionData;
2550  // We may have skipped this before because we thought that DClass
2551  // was the canonical declaration.
2552  Reader.PendingDefinitions.insert(DClass);
2553  }
2554  }
2555  DClass->DefinitionData = ExistingClass->DefinitionData;
2556 
2557  return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2558  Result);
2559  }
2560  if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2561  return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2562  Result);
2563  if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2564  return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2565  if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2566  return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2567  Result);
2568  llvm_unreachable("merged an unknown kind of redeclarable template");
2569 }
2570 
2571 /// Attempts to merge the given declaration (D) with another declaration
2572 /// of the same entity.
2573 template<typename T>
2575  RedeclarableResult &Redecl,
2576  DeclID TemplatePatternID) {
2577  auto *D = static_cast<T *>(DBase);
2578  T *ExistingCanon = Existing->getCanonicalDecl();
2579  T *DCanon = D->getCanonicalDecl();
2580  if (ExistingCanon != DCanon) {
2581  assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2582  "already merged this declaration");
2583 
2584  // Have our redeclaration link point back at the canonical declaration
2585  // of the existing declaration, so that this declaration has the
2586  // appropriate canonical declaration.
2587  D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2588  D->First = ExistingCanon;
2589  ExistingCanon->Used |= D->Used;
2590  D->Used = false;
2591 
2592  // When we merge a namespace, update its pointer to the first namespace.
2593  // We cannot have loaded any redeclarations of this declaration yet, so
2594  // there's nothing else that needs to be updated.
2595  if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2596  Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2597  assert_cast<NamespaceDecl*>(ExistingCanon));
2598 
2599  // When we merge a template, merge its pattern.
2600  if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2601  mergeTemplatePattern(
2602  DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2603  TemplatePatternID, Redecl.isKeyDecl());
2604 
2605  // If this declaration is a key declaration, make a note of that.
2606  if (Redecl.isKeyDecl())
2607  Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2608  }
2609 }
2610 
2611 /// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2612 /// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2613 /// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2614 /// that some types are mergeable during deserialization, otherwise name
2615 /// lookup fails. This is the case for EnumConstantDecl.
2617  if (!ND)
2618  return false;
2619  // TODO: implement merge for other necessary decls.
2620  if (isa<EnumConstantDecl>(ND))
2621  return true;
2622  return false;
2623 }
2624 
2625 /// Attempts to merge the given declaration (D) with another declaration
2626 /// of the same entity, for the case where the entity is not actually
2627 /// redeclarable. This happens, for instance, when merging the fields of
2628 /// identical class definitions from two different modules.
2629 template<typename T>
2631  // If modules are not available, there is no reason to perform this merge.
2632  if (!Reader.getContext().getLangOpts().Modules)
2633  return;
2634 
2635  // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2636  // Note that C identically-named things in different translation units are
2637  // not redeclarations, but may still have compatible types, where ODR-like
2638  // semantics may apply.
2639  if (!Reader.getContext().getLangOpts().CPlusPlus &&
2640  !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2641  return;
2642 
2643  if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2644  if (T *Existing = ExistingRes)
2645  Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2646  Existing->getCanonicalDecl());
2647 }
2648 
2650  VisitDecl(D);
2651  unsigned NumVars = D->varlist_size();
2653  Vars.reserve(NumVars);
2654  for (unsigned i = 0; i != NumVars; ++i) {
2655  Vars.push_back(Record.readExpr());
2656  }
2657  D->setVars(Vars);
2658 }
2659 
2661  VisitDecl(D);
2662  unsigned NumVars = D->varlist_size();
2663  unsigned NumClauses = D->clauselist_size();
2665  Vars.reserve(NumVars);
2666  for (unsigned i = 0; i != NumVars; ++i) {
2667  Vars.push_back(Record.readExpr());
2668  }
2669  D->setVars(Vars);
2671  Clauses.reserve(NumClauses);
2672  OMPClauseReader ClauseReader(Record);
2673  for (unsigned I = 0; I != NumClauses; ++I)
2674  Clauses.push_back(ClauseReader.readClause());
2675  D->setClauses(Clauses);
2676 }
2677 
2679  VisitDecl(D);
2680  unsigned NumClauses = D->clauselist_size();
2682  Clauses.reserve(NumClauses);
2683  OMPClauseReader ClauseReader(Record);
2684  for (unsigned I = 0; I != NumClauses; ++I)
2685  Clauses.push_back(ClauseReader.readClause());
2686  D->setClauses(Clauses);
2687 }
2688 
2690  VisitValueDecl(D);
2691  D->setLocation(ReadSourceLocation());
2692  Expr *In = Record.readExpr();
2693  Expr *Out = Record.readExpr();
2694  D->setCombinerData(In, Out);
2695  Expr *Combiner = Record.readExpr();
2696  D->setCombiner(Combiner);
2697  Expr *Orig = Record.readExpr();
2698  Expr *Priv = Record.readExpr();
2699  D->setInitializerData(Orig, Priv);
2700  Expr *Init = Record.readExpr();
2701  auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2702  D->setInitializer(Init, IK);
2703  D->PrevDeclInScope = ReadDeclID();
2704 }
2705 
2707  VisitValueDecl(D);
2708  D->setLocation(ReadSourceLocation());
2709  Expr *MapperVarRefE = Record.readExpr();
2710  D->setMapperVarRef(MapperVarRefE);
2711  D->VarName = Record.readDeclarationName();
2712  D->PrevDeclInScope = ReadDeclID();
2713  unsigned NumClauses = D->clauselist_size();
2715  Clauses.reserve(NumClauses);
2716  OMPClauseReader ClauseReader(Record);
2717  for (unsigned I = 0; I != NumClauses; ++I)
2718  Clauses.push_back(ClauseReader.readClause());
2719  D->setClauses(Clauses);
2720 }
2721 
2723  VisitVarDecl(D);
2724 }
2725 
2726 //===----------------------------------------------------------------------===//
2727 // Attribute Reading
2728 //===----------------------------------------------------------------------===//
2729 
2730 namespace {
2731 class AttrReader {
2732  ModuleFile *F;
2733  ASTReader *Reader;
2734  const ASTReader::RecordData &Record;
2735  unsigned &Idx;
2736 
2737 public:
2738  AttrReader(ModuleFile &F, ASTReader &Reader,
2739  const ASTReader::RecordData &Record, unsigned &Idx)
2740  : F(&F), Reader(&Reader), Record(Record), Idx(Idx) {}
2741 
2742  const uint64_t &readInt() { return Record[Idx++]; }
2743 
2744  SourceRange readSourceRange() {
2745  return Reader->ReadSourceRange(*F, Record, Idx);
2746  }
2747 
2748  Expr *readExpr() { return Reader->ReadExpr(*F); }
2749 
2750  std::string readString() {
2751  return Reader->ReadString(Record, Idx);
2752  }
2753 
2754  TypeSourceInfo *getTypeSourceInfo() {
2755  return Reader->GetTypeSourceInfo(*F, Record, Idx);
2756  }
2757 
2758  IdentifierInfo *getIdentifierInfo() {
2759  return Reader->GetIdentifierInfo(*F, Record, Idx);
2760  }
2761 
2762  VersionTuple readVersionTuple() {
2763  return ASTReader::ReadVersionTuple(Record, Idx);
2764  }
2765 
2766  template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2767  return cast_or_null<T>(Reader->GetLocalDecl(*F, LocalID));
2768  }
2769 };
2770 }
2771 
2773  unsigned &Idx) {
2774  AttrReader Record(M, *this, Rec, Idx);
2775  auto V = Record.readInt();
2776  if (!V)
2777  return nullptr;
2778 
2779  Attr *New = nullptr;
2780  // Kind is stored as a 1-based integer because 0 is used to indicate a null
2781  // Attr pointer.
2782  auto Kind = static_cast<attr::Kind>(V - 1);
2783  SourceRange Range = Record.readSourceRange();
2784  ASTContext &Context = getContext();
2785 
2786 #include "clang/Serialization/AttrPCHRead.inc"
2787 
2788  assert(New && "Unable to decode attribute?");
2789  return New;
2790 }
2791 
2792 /// Reads attributes from the current stream position.
2794  for (unsigned I = 0, E = Record.readInt(); I != E; ++I)
2795  Attrs.push_back(Record.readAttr());
2796 }
2797 
2798 //===----------------------------------------------------------------------===//
2799 // ASTReader Implementation
2800 //===----------------------------------------------------------------------===//
2801 
2802 /// Note that we have loaded the declaration with the given
2803 /// Index.
2804 ///
2805 /// This routine notes that this declaration has already been loaded,
2806 /// so that future GetDecl calls will return this declaration rather
2807 /// than trying to load a new declaration.
2808 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2809  assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2810  DeclsLoaded[Index] = D;
2811 }
2812 
2813 /// Determine whether the consumer will be interested in seeing
2814 /// this declaration (via HandleTopLevelDecl).
2815 ///
2816 /// This routine should return true for anything that might affect
2817 /// code generation, e.g., inline function definitions, Objective-C
2818 /// declarations with metadata, etc.
2819 static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2820  // An ObjCMethodDecl is never considered as "interesting" because its
2821  // implementation container always is.
2822 
2823  // An ImportDecl or VarDecl imported from a module map module will get
2824  // emitted when we import the relevant module.
2826  auto *M = D->getImportedOwningModule();
2827  if (M && M->Kind == Module::ModuleMapModule &&
2828  Ctx.DeclMustBeEmitted(D))
2829  return false;
2830  }
2831 
2832  if (isa<FileScopeAsmDecl>(D) ||
2833  isa<ObjCProtocolDecl>(D) ||
2834  isa<ObjCImplDecl>(D) ||
2835  isa<ImportDecl>(D) ||
2836  isa<PragmaCommentDecl>(D) ||
2837  isa<PragmaDetectMismatchDecl>(D))
2838  return true;
2839  if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D) ||
2840  isa<OMPDeclareMapperDecl>(D) || isa<OMPAllocateDecl>(D))
2841  return !D->getDeclContext()->isFunctionOrMethod();
2842  if (const auto *Var = dyn_cast<VarDecl>(D))
2843  return Var->isFileVarDecl() &&
2844  (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2845  OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2846  if (const auto *Func = dyn_cast<FunctionDecl>(D))
2847  return Func->doesThisDeclarationHaveABody() || HasBody;
2848 
2849  if (auto *ES = D->getASTContext().getExternalSource())
2850  if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2851  return true;
2852 
2853  return false;
2854 }
2855 
2856 /// Get the correct cursor and offset for loading a declaration.
2857 ASTReader::RecordLocation
2858 ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2859  GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2860  assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2861  ModuleFile *M = I->second;
2862  const DeclOffset &DOffs =
2863  M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2864  Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2865  return RecordLocation(M, DOffs.BitOffset);
2866 }
2867 
2868 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2869  auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2870 
2871  assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2872  return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2873 }
2874 
2875 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2876  return LocalOffset + M.GlobalBitOffset;
2877 }
2878 
2880  const TemplateParameterList *Y);
2881 
2882 /// Determine whether two template parameters are similar enough
2883 /// that they may be used in declarations of the same template.
2884 static bool isSameTemplateParameter(const NamedDecl *X,
2885  const NamedDecl *Y) {
2886  if (X->getKind() != Y->getKind())
2887  return false;
2888 
2889  if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2890  const auto *TY = cast<TemplateTypeParmDecl>(Y);
2891  return TX->isParameterPack() == TY->isParameterPack();
2892  }
2893 
2894  if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2895  const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2896  return TX->isParameterPack() == TY->isParameterPack() &&
2897  TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2898  }
2899 
2900  const auto *TX = cast<TemplateTemplateParmDecl>(X);
2901  const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2902  return TX->isParameterPack() == TY->isParameterPack() &&
2903  isSameTemplateParameterList(TX->getTemplateParameters(),
2904  TY->getTemplateParameters());
2905 }
2906 
2908  if (auto *NS = X->getAsNamespace())
2909  return NS;
2910  if (auto *NAS = X->getAsNamespaceAlias())
2911  return NAS->getNamespace();
2912  return nullptr;
2913 }
2914 
2916  const NestedNameSpecifier *Y) {
2917  if (auto *NSX = getNamespace(X)) {
2918  auto *NSY = getNamespace(Y);
2919  if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2920  return false;
2921  } else if (X->getKind() != Y->getKind())
2922  return false;
2923 
2924  // FIXME: For namespaces and types, we're permitted to check that the entity
2925  // is named via the same tokens. We should probably do so.
2926  switch (X->getKind()) {
2928  if (X->getAsIdentifier() != Y->getAsIdentifier())
2929  return false;
2930  break;
2933  // We've already checked that we named the same namespace.
2934  break;
2937  if (X->getAsType()->getCanonicalTypeInternal() !=
2939  return false;
2940  break;
2943  return true;
2944  }
2945 
2946  // Recurse into earlier portion of NNS, if any.
2947  auto *PX = X->getPrefix();
2948  auto *PY = Y->getPrefix();
2949  if (PX && PY)
2950  return isSameQualifier(PX, PY);
2951  return !PX && !PY;
2952 }
2953 
2954 /// Determine whether two template parameter lists are similar enough
2955 /// that they may be used in declarations of the same template.
2957  const TemplateParameterList *Y) {
2958  if (X->size() != Y->size())
2959  return false;
2960 
2961  for (unsigned I = 0, N = X->size(); I != N; ++I)
2962  if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2963  return false;
2964 
2965  return true;
2966 }
2967 
2968 /// Determine whether the attributes we can overload on are identical for A and
2969 /// B. Will ignore any overloadable attrs represented in the type of A and B.
2971  const FunctionDecl *B) {
2972  // Note that pass_object_size attributes are represented in the function's
2973  // ExtParameterInfo, so we don't need to check them here.
2974 
2975  llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2976  auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
2977  auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
2978 
2979  for (auto Pair : zip_longest(AEnableIfAttrs, BEnableIfAttrs)) {
2980  Optional<EnableIfAttr *> Cand1A = std::get<0>(Pair);
2981  Optional<EnableIfAttr *> Cand2A = std::get<1>(Pair);
2982 
2983  // Return false if the number of enable_if attributes is different.
2984  if (!Cand1A || !Cand2A)
2985  return false;
2986 
2987  Cand1ID.clear();
2988  Cand2ID.clear();
2989 
2990  (*Cand1A)->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2991  (*Cand2A)->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2992 
2993  // Return false if any of the enable_if expressions of A and B are
2994  // different.
2995  if (Cand1ID != Cand2ID)
2996  return false;
2997  }
2998  return true;
2999 }
3000 
3001 /// Determine whether the two declarations refer to the same entity.
3002 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
3003  assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
3004 
3005  if (X == Y)
3006  return true;
3007 
3008  // Must be in the same context.
3009  //
3010  // Note that we can't use DeclContext::Equals here, because the DeclContexts
3011  // could be two different declarations of the same function. (We will fix the
3012  // semantic DC to refer to the primary definition after merging.)
3013  if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
3014  cast<Decl>(Y->getDeclContext()->getRedeclContext())))
3015  return false;
3016 
3017  // Two typedefs refer to the same entity if they have the same underlying
3018  // type.
3019  if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
3020  if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
3021  return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
3022  TypedefY->getUnderlyingType());
3023 
3024  // Must have the same kind.
3025  if (X->getKind() != Y->getKind())
3026  return false;
3027 
3028  // Objective-C classes and protocols with the same name always match.
3029  if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
3030  return true;
3031 
3032  if (isa<ClassTemplateSpecializationDecl>(X)) {
3033  // No need to handle these here: we merge them when adding them to the
3034  // template.
3035  return false;
3036  }
3037 
3038  // Compatible tags match.
3039  if (const auto *TagX = dyn_cast<TagDecl>(X)) {
3040  const auto *TagY = cast<TagDecl>(Y);
3041  return (TagX->getTagKind() == TagY->getTagKind()) ||
3042  ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
3043  TagX->getTagKind() == TTK_Interface) &&
3044  (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
3045  TagY->getTagKind() == TTK_Interface));
3046  }
3047 
3048  // Functions with the same type and linkage match.
3049  // FIXME: This needs to cope with merging of prototyped/non-prototyped
3050  // functions, etc.
3051  if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
3052  const auto *FuncY = cast<FunctionDecl>(Y);
3053  if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
3054  const auto *CtorY = cast<CXXConstructorDecl>(Y);
3055  if (CtorX->getInheritedConstructor() &&
3056  !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
3057  CtorY->getInheritedConstructor().getConstructor()))
3058  return false;
3059  }
3060 
3061  if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
3062  return false;
3063 
3064  // Multiversioned functions with different feature strings are represented
3065  // as separate declarations.
3066  if (FuncX->isMultiVersion()) {
3067  const auto *TAX = FuncX->getAttr<TargetAttr>();
3068  const auto *TAY = FuncY->getAttr<TargetAttr>();
3069  assert(TAX && TAY && "Multiversion Function without target attribute");
3070 
3071  if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
3072  return false;
3073  }
3074 
3075  ASTContext &C = FuncX->getASTContext();
3076  auto GetTypeAsWritten = [](const FunctionDecl *FD) {
3077  // Map to the first declaration that we've already merged into this one.
3078  // The TSI of redeclarations might not match (due to calling conventions
3079  // being inherited onto the type but not the TSI), but the TSI type of
3080  // the first declaration of the function should match across modules.
3081  FD = FD->getCanonicalDecl();
3082  return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3083  : FD->getType();
3084  };
3085  QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3086  if (!C.hasSameType(XT, YT)) {
3087  // We can get functions with different types on the redecl chain in C++17
3088  // if they have differing exception specifications and at least one of
3089  // the excpetion specs is unresolved.
3090  auto *XFPT = XT->getAs<FunctionProtoType>();
3091  auto *YFPT = YT->getAs<FunctionProtoType>();
3092  if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3093  (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3096  return true;
3097  return false;
3098  }
3099  return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3100  hasSameOverloadableAttrs(FuncX, FuncY);
3101  }
3102 
3103  // Variables with the same type and linkage match.
3104  if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3105  const auto *VarY = cast<VarDecl>(Y);
3106  if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3107  ASTContext &C = VarX->getASTContext();
3108  if (C.hasSameType(VarX->getType(), VarY->getType()))
3109  return true;
3110 
3111  // We can get decls with different types on the redecl chain. Eg.
3112  // template <typename T> struct S { static T Var[]; }; // #1
3113  // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3114  // Only? happens when completing an incomplete array type. In this case
3115  // when comparing #1 and #2 we should go through their element type.
3116  const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3117  const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3118  if (!VarXTy || !VarYTy)
3119  return false;
3120  if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3121  return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3122  }
3123  return false;
3124  }
3125 
3126  // Namespaces with the same name and inlinedness match.
3127  if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3128  const auto *NamespaceY = cast<NamespaceDecl>(Y);
3129  return NamespaceX->isInline() == NamespaceY->isInline();
3130  }
3131 
3132  // Identical template names and kinds match if their template parameter lists
3133  // and patterns match.
3134  if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3135  const auto *TemplateY = cast<TemplateDecl>(Y);
3136  return isSameEntity(TemplateX->getTemplatedDecl(),
3137  TemplateY->getTemplatedDecl()) &&
3138  isSameTemplateParameterList(TemplateX->getTemplateParameters(),
3139  TemplateY->getTemplateParameters());
3140  }
3141 
3142  // Fields with the same name and the same type match.
3143  if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3144  const auto *FDY = cast<FieldDecl>(Y);
3145  // FIXME: Also check the bitwidth is odr-equivalent, if any.
3146  return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3147  }
3148 
3149  // Indirect fields with the same target field match.
3150  if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3151  const auto *IFDY = cast<IndirectFieldDecl>(Y);
3152  return IFDX->getAnonField()->getCanonicalDecl() ==
3153  IFDY->getAnonField()->getCanonicalDecl();
3154  }
3155 
3156  // Enumerators with the same name match.
3157  if (isa<EnumConstantDecl>(X))
3158  // FIXME: Also check the value is odr-equivalent.
3159  return true;
3160 
3161  // Using shadow declarations with the same target match.
3162  if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3163  const auto *USY = cast<UsingShadowDecl>(Y);
3164  return USX->getTargetDecl() == USY->getTargetDecl();
3165  }
3166 
3167  // Using declarations with the same qualifier match. (We already know that
3168  // the name matches.)
3169  if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3170  const auto *UY = cast<UsingDecl>(Y);
3171  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3172  UX->hasTypename() == UY->hasTypename() &&
3173  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3174  }
3175  if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3176  const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3177  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3178  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3179  }
3180  if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3181  return isSameQualifier(
3182  UX->getQualifier(),
3183  cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3184 
3185  // Namespace alias definitions with the same target match.
3186  if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3187  const auto *NAY = cast<NamespaceAliasDecl>(Y);
3188  return NAX->getNamespace()->Equals(NAY->getNamespace());
3189  }
3190 
3191  return false;
3192 }
3193 
3194 /// Find the context in which we should search for previous declarations when
3195 /// looking for declarations to merge.
3196 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3197  DeclContext *DC) {
3198  if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3199  return ND->getOriginalNamespace();
3200 
3201  if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3202  // Try to dig out the definition.
3203  auto *DD = RD->DefinitionData;
3204  if (!DD)
3205  DD = RD->getCanonicalDecl()->DefinitionData;
3206 
3207  // If there's no definition yet, then DC's definition is added by an update
3208  // record, but we've not yet loaded that update record. In this case, we
3209  // commit to DC being the canonical definition now, and will fix this when
3210  // we load the update record.
3211  if (!DD) {
3212  DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3213  RD->setCompleteDefinition(true);
3214  RD->DefinitionData = DD;
3215  RD->getCanonicalDecl()->DefinitionData = DD;
3216 
3217  // Track that we did this horrible thing so that we can fix it later.
3218  Reader.PendingFakeDefinitionData.insert(
3219  std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3220  }
3221 
3222  return DD->Definition;
3223  }
3224 
3225  if (auto *ED = dyn_cast<EnumDecl>(DC))
3226  return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3227  : nullptr;
3228 
3229  // We can see the TU here only if we have no Sema object. In that case,
3230  // there's no TU scope to look in, so using the DC alone is sufficient.
3231  if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3232  return TU;
3233 
3234  return nullptr;
3235 }
3236 
3237 ASTDeclReader::FindExistingResult::~FindExistingResult() {
3238  // Record that we had a typedef name for linkage whether or not we merge
3239  // with that declaration.
3240  if (TypedefNameForLinkage) {
3241  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3242  Reader.ImportedTypedefNamesForLinkage.insert(
3243  std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3244  return;
3245  }
3246 
3247  if (!AddResult || Existing)
3248  return;
3249 
3250  DeclarationName Name = New->getDeclName();
3251  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3253  setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3254  AnonymousDeclNumber, New);
3255  } else if (DC->isTranslationUnit() &&
3256  !Reader.getContext().getLangOpts().CPlusPlus) {
3257  if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3258  Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3259  .push_back(New);
3260  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3261  // Add the declaration to its redeclaration context so later merging
3262  // lookups will find it.
3263  MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3264  }
3265 }
3266 
3267 /// Find the declaration that should be merged into, given the declaration found
3268 /// by name lookup. If we're merging an anonymous declaration within a typedef,
3269 /// we need a matching typedef, and we merge with the type inside it.
3271  bool IsTypedefNameForLinkage) {
3272  if (!IsTypedefNameForLinkage)
3273  return Found;
3274 
3275  // If we found a typedef declaration that gives a name to some other
3276  // declaration, then we want that inner declaration. Declarations from
3277  // AST files are handled via ImportedTypedefNamesForLinkage.
3278  if (Found->isFromASTFile())
3279  return nullptr;
3280 
3281  if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3282  return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3283 
3284  return nullptr;
3285 }
3286 
3287 /// Find the declaration to use to populate the anonymous declaration table
3288 /// for the given lexical DeclContext. We only care about finding local
3289 /// definitions of the context; we'll merge imported ones as we go.
3290 DeclContext *
3291 ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3292  // For classes, we track the definition as we merge.
3293  if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3294  auto *DD = RD->getCanonicalDecl()->DefinitionData;
3295  return DD ? DD->Definition : nullptr;
3296  }
3297 
3298  // For anything else, walk its merged redeclarations looking for a definition.
3299  // Note that we can't just call getDefinition here because the redeclaration
3300  // chain isn't wired up.
3301  for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3302  if (auto *FD = dyn_cast<FunctionDecl>(D))
3303  if (FD->isThisDeclarationADefinition())
3304  return FD;
3305  if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3306  if (MD->isThisDeclarationADefinition())
3307  return MD;
3308  }
3309 
3310  // No merged definition yet.
3311  return nullptr;
3312 }
3313 
3314 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3315  DeclContext *DC,
3316  unsigned Index) {
3317  // If the lexical context has been merged, look into the now-canonical
3318  // definition.
3319  auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3320 
3321  // If we've seen this before, return the canonical declaration.
3322  auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3323  if (Index < Previous.size() && Previous[Index])
3324  return Previous[Index];
3325 
3326  // If this is the first time, but we have parsed a declaration of the context,
3327  // build the anonymous declaration list from the parsed declaration.
3328  auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3329  if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3330  numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3331  if (Previous.size() == Number)
3332  Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3333  else
3334  Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3335  });
3336  }
3337 
3338  return Index < Previous.size() ? Previous[Index] : nullptr;
3339 }
3340 
3341 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3342  DeclContext *DC, unsigned Index,
3343  NamedDecl *D) {
3344  auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3345 
3346  auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3347  if (Index >= Previous.size())
3348  Previous.resize(Index + 1);
3349  if (!Previous[Index])
3350  Previous[Index] = D;
3351 }
3352 
3353 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3354  DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3355  : D->getDeclName();
3356 
3357  if (!Name && !needsAnonymousDeclarationNumber(D)) {
3358  // Don't bother trying to find unnamed declarations that are in
3359  // unmergeable contexts.
3360  FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3361  AnonymousDeclNumber, TypedefNameForLinkage);
3362  Result.suppress();
3363  return Result;
3364  }
3365 
3367  if (TypedefNameForLinkage) {
3368  auto It = Reader.ImportedTypedefNamesForLinkage.find(
3369  std::make_pair(DC, TypedefNameForLinkage));
3370  if (It != Reader.ImportedTypedefNamesForLinkage.end())
3371  if (isSameEntity(It->second, D))
3372  return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3373  TypedefNameForLinkage);
3374  // Go on to check in other places in case an existing typedef name
3375  // was not imported.
3376  }
3377 
3379  // This is an anonymous declaration that we may need to merge. Look it up
3380  // in its context by number.
3381  if (auto *Existing = getAnonymousDeclForMerging(
3382  Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3383  if (isSameEntity(Existing, D))
3384  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3385  TypedefNameForLinkage);
3386  } else if (DC->isTranslationUnit() &&
3387  !Reader.getContext().getLangOpts().CPlusPlus) {
3388  IdentifierResolver &IdResolver = Reader.getIdResolver();
3389 
3390  // Temporarily consider the identifier to be up-to-date. We don't want to
3391  // cause additional lookups here.
3392  class UpToDateIdentifierRAII {
3393  IdentifierInfo *II;
3394  bool WasOutToDate = false;
3395 
3396  public:
3397  explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3398  if (II) {
3399  WasOutToDate = II->isOutOfDate();
3400  if (WasOutToDate)
3401  II->setOutOfDate(false);
3402  }
3403  }
3404 
3405  ~UpToDateIdentifierRAII() {
3406  if (WasOutToDate)
3407  II->setOutOfDate(true);
3408  }
3409  } UpToDate(Name.getAsIdentifierInfo());
3410 
3411  for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3412  IEnd = IdResolver.end();
3413  I != IEnd; ++I) {
3414  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3415  if (isSameEntity(Existing, D))
3416  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3417  TypedefNameForLinkage);
3418  }
3419  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3420  DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3421  for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3422  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3423  if (isSameEntity(Existing, D))
3424  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3425  TypedefNameForLinkage);
3426  }
3427  } else {
3428  // Not in a mergeable context.
3429  return FindExistingResult(Reader);
3430  }
3431 
3432  // If this declaration is from a merged context, make a note that we need to
3433  // check that the canonical definition of that context contains the decl.
3434  //
3435  // FIXME: We should do something similar if we merge two definitions of the
3436  // same template specialization into the same CXXRecordDecl.
3437  auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3438  if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3439  MergedDCIt->second == D->getDeclContext())
3440  Reader.PendingOdrMergeChecks.push_back(D);
3441 
3442  return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3443  AnonymousDeclNumber, TypedefNameForLinkage);
3444 }
3445 
3446 template<typename DeclT>
3448  return D->RedeclLink.getLatestNotUpdated();
3449 }
3450 
3452  llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3453 }
3454 
3456  assert(D);
3457 
3458  switch (D->getKind()) {
3459 #define ABSTRACT_DECL(TYPE)
3460 #define DECL(TYPE, BASE) \
3461  case Decl::TYPE: \
3462  return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3463 #include "clang/AST/DeclNodes.inc"
3464  }
3465  llvm_unreachable("unknown decl kind");
3466 }
3467 
3468 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3470 }
3471 
3472 template<typename DeclT>
3475  Decl *Previous, Decl *Canon) {
3476  D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3477  D->First = cast<DeclT>(Previous)->First;
3478 }
3479 
3480 namespace clang {
3481 
3482 template<>
3485  Decl *Previous, Decl *Canon) {
3486  auto *VD = static_cast<VarDecl *>(D);
3487  auto *PrevVD = cast<VarDecl>(Previous);
3488  D->RedeclLink.setPrevious(PrevVD);
3489  D->First = PrevVD->First;
3490 
3491  // We should keep at most one definition on the chain.
3492  // FIXME: Cache the definition once we've found it. Building a chain with
3493  // N definitions currently takes O(N^2) time here.
3494  if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3495  for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3496  if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3497  Reader.mergeDefinitionVisibility(CurD, VD);
3498  VD->demoteThisDefinitionToDeclaration();
3499  break;
3500  }
3501  }
3502  }
3503 }
3504 
3506  auto *DT = T->getContainedDeducedType();
3507  return DT && !DT->isDeduced();
3508 }
3509 
3510 template<>
3513  Decl *Previous, Decl *Canon) {
3514  auto *FD = static_cast<FunctionDecl *>(D);
3515  auto *PrevFD = cast<FunctionDecl>(Previous);
3516 
3517  FD->RedeclLink.setPrevious(PrevFD);
3518  FD->First = PrevFD->First;
3519 
3520  // If the previous declaration is an inline function declaration, then this
3521  // declaration is too.
3522  if (PrevFD->isInlined() != FD->isInlined()) {
3523  // FIXME: [dcl.fct.spec]p4:
3524  // If a function with external linkage is declared inline in one
3525  // translation unit, it shall be declared inline in all translation
3526  // units in which it appears.
3527  //
3528  // Be careful of this case:
3529  //
3530  // module A:
3531  // template<typename T> struct X { void f(); };
3532  // template<typename T> inline void X<T>::f() {}
3533  //
3534  // module B instantiates the declaration of X<int>::f
3535  // module C instantiates the definition of X<int>::f
3536  //
3537  // If module B and C are merged, we do not have a violation of this rule.
3538  FD->setImplicitlyInline(true);
3539  }
3540 
3541  auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3542  auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3543  if (FPT && PrevFPT) {
3544  // If we need to propagate an exception specification along the redecl
3545  // chain, make a note of that so that we can do so later.
3546  bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3547  bool WasUnresolved =
3549  if (IsUnresolved != WasUnresolved)
3550  Reader.PendingExceptionSpecUpdates.insert(
3551  {Canon, IsUnresolved ? PrevFD : FD});
3552 
3553  // If we need to propagate a deduced return type along the redecl chain,
3554  // make a note of that so that we can do it later.
3555  bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3556  bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3557  if (IsUndeduced != WasUndeduced)
3558  Reader.PendingDeducedTypeUpdates.insert(
3559  {cast<FunctionDecl>(Canon),
3560  (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3561  }
3562 }
3563 
3564 } // namespace clang
3565 
3567  llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3568 }
3569 
3570 /// Inherit the default template argument from \p From to \p To. Returns
3571 /// \c false if there is no default template for \p From.
3572 template <typename ParmDecl>
3573 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3574  Decl *ToD) {
3575  auto *To = cast<ParmDecl>(ToD);
3576  if (!From->hasDefaultArgument())
3577  return false;
3578  To->setInheritedDefaultArgument(Context, From);
3579  return true;
3580 }
3581 
3583  TemplateDecl *From,
3584  TemplateDecl *To) {
3585  auto *FromTP = From->getTemplateParameters();
3586  auto *ToTP = To->getTemplateParameters();
3587  assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3588 
3589  for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3590  NamedDecl *FromParam = FromTP->getParam(I);
3591  NamedDecl *ToParam = ToTP->getParam(I);
3592 
3593  if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3594  inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3595  else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3596  inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3597  else
3599  Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3600  }
3601 }
3602 
3604  Decl *Previous, Decl *Canon) {
3605  assert(D && Previous);
3606 
3607  switch (D->getKind()) {
3608 #define ABSTRACT_DECL(TYPE)
3609 #define DECL(TYPE, BASE) \
3610  case Decl::TYPE: \
3611  attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3612  break;
3613 #include "clang/AST/DeclNodes.inc"
3614  }
3615 
3616  // If the declaration was visible in one module, a redeclaration of it in
3617  // another module remains visible even if it wouldn't be visible by itself.
3618  //
3619  // FIXME: In this case, the declaration should only be visible if a module
3620  // that makes it visible has been imported.
3621  D->IdentifierNamespace |=
3622  Previous->IdentifierNamespace &
3624 
3625  // If the declaration declares a template, it may inherit default arguments
3626  // from the previous declaration.
3627  if (auto *TD = dyn_cast<TemplateDecl>(D))
3629  cast<TemplateDecl>(Previous), TD);
3630 }
3631 
3632 template<typename DeclT>
3634  D->RedeclLink.setLatest(cast<DeclT>(Latest));
3635 }
3636 
3638  llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3639 }
3640 
3642  assert(D && Latest);
3643 
3644  switch (D->getKind()) {
3645 #define ABSTRACT_DECL(TYPE)
3646 #define DECL(TYPE, BASE) \
3647  case Decl::TYPE: \
3648  attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3649  break;
3650 #include "clang/AST/DeclNodes.inc"
3651  }
3652 }
3653 
3654 template<typename DeclT>
3656  D->RedeclLink.markIncomplete();
3657 }
3658 
3660  llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3661 }
3662 
3663 void ASTReader::markIncompleteDeclChain(Decl *D) {
3664  switch (D->getKind()) {
3665 #define ABSTRACT_DECL(TYPE)
3666 #define DECL(TYPE, BASE) \
3667  case Decl::TYPE: \
3668  ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3669  break;
3670 #include "clang/AST/DeclNodes.inc"
3671  }
3672 }
3673 
3674 /// Read the declaration at the given offset from the AST file.
3675 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3676  unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3677  SourceLocation DeclLoc;
3678  RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3679  llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3680  // Keep track of where we are in the stream, then jump back there
3681  // after reading this declaration.
3682  SavedStreamPosition SavedPosition(DeclsCursor);
3683 
3684  ReadingKindTracker ReadingKind(Read_Decl, *this);
3685 
3686  // Note that we are loading a declaration record.
3687  Deserializing ADecl(this);
3688 
3689  auto Fail = [](const char *what, llvm::Error &&Err) {
3690  llvm::report_fatal_error(Twine("ASTReader::ReadDeclRecord failed ") + what +
3691  ": " + toString(std::move(Err)));
3692  };
3693 
3694  if (llvm::Error JumpFailed = DeclsCursor.JumpToBit(Loc.Offset))
3695  Fail("jumping", std::move(JumpFailed));
3696  ASTRecordReader Record(*this, *Loc.F);
3697  ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3698  Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
3699  if (!MaybeCode)
3700  Fail("reading code", MaybeCode.takeError());
3701  unsigned Code = MaybeCode.get();
3702 
3703  ASTContext &Context = getContext();
3704  Decl *D = nullptr;
3705  Expected<unsigned> MaybeDeclCode = Record.readRecord(DeclsCursor, Code);
3706  if (!MaybeDeclCode)
3707  llvm::report_fatal_error(
3708  "ASTReader::ReadDeclRecord failed reading decl code: " +
3709  toString(MaybeDeclCode.takeError()));
3710  switch ((DeclCode)MaybeDeclCode.get()) {
3711  case DECL_CONTEXT_LEXICAL:
3712  case DECL_CONTEXT_VISIBLE:
3713  llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3714  case DECL_TYPEDEF:
3715  D = TypedefDecl::CreateDeserialized(Context, ID);
3716  break;
3717  case DECL_TYPEALIAS:
3718  D = TypeAliasDecl::CreateDeserialized(Context, ID);
3719  break;
3720  case DECL_ENUM:
3721  D = EnumDecl::CreateDeserialized(Context, ID);
3722  break;
3723  case DECL_RECORD:
3724  D = RecordDecl::CreateDeserialized(Context, ID);
3725  break;
3726  case DECL_ENUM_CONSTANT:
3727  D = EnumConstantDecl::CreateDeserialized(Context, ID);
3728  break;
3729  case DECL_FUNCTION:
3730  D = FunctionDecl::CreateDeserialized(Context, ID);
3731  break;
3732  case DECL_LINKAGE_SPEC:
3733  D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3734  break;
3735  case DECL_EXPORT:
3736  D = ExportDecl::CreateDeserialized(Context, ID);
3737  break;
3738  case DECL_LABEL:
3739  D = LabelDecl::CreateDeserialized(Context, ID);
3740  break;
3741  case DECL_NAMESPACE:
3742  D = NamespaceDecl::CreateDeserialized(Context, ID);
3743  break;
3744  case DECL_NAMESPACE_ALIAS:
3745  D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3746  break;
3747  case DECL_USING:
3748  D = UsingDecl::CreateDeserialized(Context, ID);
3749  break;
3750  case DECL_USING_PACK:
3751  D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3752  break;
3753  case DECL_USING_SHADOW:
3754  D = UsingShadowDecl::CreateDeserialized(Context, ID);
3755  break;
3758  break;
3759  case DECL_USING_DIRECTIVE:
3760  D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3761  break;
3764  break;
3767  break;
3768  case DECL_CXX_RECORD:
3769  D = CXXRecordDecl::CreateDeserialized(Context, ID);
3770  break;
3773  break;
3774  case DECL_CXX_METHOD:
3775  D = CXXMethodDecl::CreateDeserialized(Context, ID);
3776  break;
3777  case DECL_CXX_CONSTRUCTOR:
3778  D = CXXConstructorDecl::CreateDeserialized(Context, ID, Record.readInt());
3779  break;
3780  case DECL_CXX_DESTRUCTOR:
3781  D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3782  break;
3783  case DECL_CXX_CONVERSION:
3784  D = CXXConversionDecl::CreateDeserialized(Context, ID);
3785  break;
3786  case DECL_ACCESS_SPEC:
3787  D = AccessSpecDecl::CreateDeserialized(Context, ID);
3788  break;
3789  case DECL_FRIEND:
3790  D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3791  break;
3792  case DECL_FRIEND_TEMPLATE:
3793  D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3794  break;
3795  case DECL_CLASS_TEMPLATE:
3796  D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3797  break;
3800  break;
3803  break;
3804  case DECL_VAR_TEMPLATE:
3805  D = VarTemplateDecl::CreateDeserialized(Context, ID);
3806  break;
3809  break;
3812  break;
3815  break;
3818  break;
3821  break;
3824  break;
3827  Record.readInt());
3828  break;
3831  break;
3834  Record.readInt());
3835  break;
3838  break;
3839  case DECL_CONCEPT:
3840  D = ConceptDecl::CreateDeserialized(Context, ID);
3841  break;
3842  case DECL_STATIC_ASSERT:
3843  D = StaticAssertDecl::CreateDeserialized(Context, ID);
3844  break;
3845  case DECL_OBJC_METHOD:
3846  D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3847  break;
3848  case DECL_OBJC_INTERFACE:
3849  D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3850  break;
3851  case DECL_OBJC_IVAR:
3852  D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3853  break;
3854  case DECL_OBJC_PROTOCOL:
3855  D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3856  break;
3858  D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3859  break;
3860  case DECL_OBJC_CATEGORY:
3861  D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3862  break;
3865  break;
3868  break;
3871  break;
3872  case DECL_OBJC_PROPERTY:
3873  D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3874  break;
3877  break;
3878  case DECL_FIELD:
3879  D = FieldDecl::CreateDeserialized(Context, ID);
3880  break;
3881  case DECL_INDIRECTFIELD:
3882  D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3883  break;
3884  case DECL_VAR:
3885  D = VarDecl::CreateDeserialized(Context, ID);
3886  break;
3887  case DECL_IMPLICIT_PARAM:
3888  D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3889  break;
3890  case DECL_PARM_VAR:
3891  D = ParmVarDecl::CreateDeserialized(Context, ID);
3892  break;
3893  case DECL_DECOMPOSITION:
3894  D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3895  break;
3896  case DECL_BINDING:
3897  D = BindingDecl::CreateDeserialized(Context, ID);
3898  break;
3899  case DECL_FILE_SCOPE_ASM:
3900  D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3901  break;
3902  case DECL_BLOCK:
3903  D = BlockDecl::CreateDeserialized(Context, ID);
3904  break;
3905  case DECL_MS_PROPERTY:
3906  D = MSPropertyDecl::CreateDeserialized(Context, ID);
3907  break;
3908  case DECL_CAPTURED:
3909  D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3910  break;
3912  Error("attempt to read a C++ base-specifier record as a declaration");
3913  return nullptr;
3915  Error("attempt to read a C++ ctor initializer record as a declaration");
3916  return nullptr;
3917  case DECL_IMPORT:
3918  // Note: last entry of the ImportDecl record is the number of stored source
3919  // locations.
3920  D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3921  break;
3923  D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3924  break;
3925  case DECL_OMP_ALLOCATE: {
3926  unsigned NumVars = Record.readInt();
3927  unsigned NumClauses = Record.readInt();
3928  D = OMPAllocateDecl::CreateDeserialized(Context, ID, NumVars, NumClauses);
3929  break;
3930  }
3931  case DECL_OMP_REQUIRES:
3932  D = OMPRequiresDecl::CreateDeserialized(Context, ID, Record.readInt());
3933  break;
3936  break;
3938  D = OMPDeclareMapperDecl::CreateDeserialized(Context, ID, Record.readInt());
3939  break;
3940  case DECL_OMP_CAPTUREDEXPR:
3941  D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3942  break;
3943  case DECL_PRAGMA_COMMENT:
3944  D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3945  break;
3948  Record.readInt());
3949  break;
3950  case DECL_EMPTY:
3951  D = EmptyDecl::CreateDeserialized(Context, ID);
3952  break;
3953  case DECL_OBJC_TYPE_PARAM:
3954  D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3955  break;
3956  }
3957 
3958  assert(D && "Unknown declaration reading AST file");
3959  LoadedDecl(Index, D);
3960  // Set the DeclContext before doing any deserialization, to make sure internal
3961  // calls to Decl::getASTContext() by Decl's methods will find the
3962  // TranslationUnitDecl without crashing.
3963  D->setDeclContext(Context.getTranslationUnitDecl());
3964  Reader.Visit(D);
3965 
3966  // If this declaration is also a declaration context, get the
3967  // offsets for its tables of lexical and visible declarations.
3968  if (auto *DC = dyn_cast<DeclContext>(D)) {
3969  std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3970  if (Offsets.first &&
3971  ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3972  return nullptr;
3973  if (Offsets.second &&
3974  ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3975  return nullptr;
3976  }
3977  assert(Record.getIdx() == Record.size());
3978 
3979  // Load any relevant update records.
3980  PendingUpdateRecords.push_back(
3981  PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3982 
3983  // Load the categories after recursive loading is finished.
3984  if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3985  // If we already have a definition when deserializing the ObjCInterfaceDecl,
3986  // we put the Decl in PendingDefinitions so we can pull the categories here.
3987  if (Class->isThisDeclarationADefinition() ||
3988  PendingDefinitions.count(Class))
3989  loadObjCCategories(ID, Class);
3990 
3991  // If we have deserialized a declaration that has a definition the
3992  // AST consumer might need to know about, queue it.
3993  // We don't pass it to the consumer immediately because we may be in recursive
3994  // loading, and some declarations may still be initializing.
3995  PotentiallyInterestingDecls.push_back(
3996  InterestingDecl(D, Reader.hasPendingBody()));
3997 
3998  return D;
3999 }
4000 
4001 void ASTReader::PassInterestingDeclsToConsumer() {
4002  assert(Consumer);
4003 
4004  if (PassingDeclsToConsumer)
4005  return;
4006 
4007  // Guard variable to avoid recursively redoing the process of passing
4008  // decls to consumer.
4009  SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
4010  true);
4011 
4012  // Ensure that we've loaded all potentially-interesting declarations
4013  // that need to be eagerly loaded.
4014  for (auto ID : EagerlyDeserializedDecls)
4015  GetDecl(ID);
4016  EagerlyDeserializedDecls.clear();
4017 
4018  while (!PotentiallyInterestingDecls.empty()) {
4019  InterestingDecl D = PotentiallyInterestingDecls.front();
4020  PotentiallyInterestingDecls.pop_front();
4021  if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
4022  PassInterestingDeclToConsumer(D.getDecl());
4023  }
4024 }
4025 
4026 void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
4027  // The declaration may have been modified by files later in the chain.
4028  // If this is the case, read the record containing the updates from each file
4029  // and pass it to ASTDeclReader to make the modifications.
4030  serialization::GlobalDeclID ID = Record.ID;
4031  Decl *D = Record.D;
4032  ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
4033  DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
4034 
4035  SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
4036 
4037  if (UpdI != DeclUpdateOffsets.end()) {
4038  auto UpdateOffsets = std::move(UpdI->second);
4039  DeclUpdateOffsets.erase(UpdI);
4040 
4041  // Check if this decl was interesting to the consumer. If we just loaded
4042  // the declaration, then we know it was interesting and we skip the call
4043  // to isConsumerInterestedIn because it is unsafe to call in the
4044  // current ASTReader state.
4045  bool WasInteresting =
4046  Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
4047  for (auto &FileAndOffset : UpdateOffsets) {
4048  ModuleFile *F = FileAndOffset.first;
4049  uint64_t Offset = FileAndOffset.second;
4050  llvm::BitstreamCursor &Cursor = F->DeclsCursor;
4051  SavedStreamPosition SavedPosition(Cursor);
4052  if (llvm::Error JumpFailed = Cursor.JumpToBit(Offset))
4053  // FIXME don't do a fatal error.
4054  llvm::report_fatal_error(
4055  "ASTReader::loadDeclUpdateRecords failed jumping: " +
4056  toString(std::move(JumpFailed)));
4057  Expected<unsigned> MaybeCode = Cursor.ReadCode();
4058  if (!MaybeCode)
4059  llvm::report_fatal_error(
4060  "ASTReader::loadDeclUpdateRecords failed reading code: " +
4061  toString(MaybeCode.takeError()));
4062  unsigned Code = MaybeCode.get();
4063  ASTRecordReader Record(*this, *F);
4064  if (Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, Code))
4065  assert(MaybeRecCode.get() == DECL_UPDATES &&
4066  "Expected DECL_UPDATES record!");
4067  else
4068  llvm::report_fatal_error(
4069  "ASTReader::loadDeclUpdateRecords failed reading rec code: " +
4070  toString(MaybeCode.takeError()));
4071 
4072  ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4073  SourceLocation());
4074  Reader.UpdateDecl(D, PendingLazySpecializationIDs);
4075 
4076  // We might have made this declaration interesting. If so, remember that
4077  // we need to hand it off to the consumer.
4078  if (!WasInteresting &&
4079  isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
4080  PotentiallyInterestingDecls.push_back(
4081  InterestingDecl(D, Reader.hasPendingBody()));
4082  WasInteresting = true;
4083  }
4084  }
4085  }
4086  // Add the lazy specializations to the template.
4087  assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||
4088  isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&
4089  "Must not have pending specializations");
4090  if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
4091  ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
4092  else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4093  ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
4094  else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4095  ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4096  PendingLazySpecializationIDs.clear();
4097 
4098  // Load the pending visible updates for this decl context, if it has any.
4099  auto I = PendingVisibleUpdates.find(ID);
4100  if (I != PendingVisibleUpdates.end()) {
4101  auto VisibleUpdates = std::move(I->second);
4102  PendingVisibleUpdates.erase(I);
4103 
4104  auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4105  for (const auto &Update : VisibleUpdates)
4106  Lookups[DC].Table.add(
4107  Update.Mod, Update.Data,
4109  DC->setHasExternalVisibleStorage(true);
4110  }
4111 }
4112 
4113 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4114  // Attach FirstLocal to the end of the decl chain.
4115  Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4116  if (FirstLocal != CanonDecl) {
4117  Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4119  *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4120  CanonDecl);
4121  }
4122 
4123  if (!LocalOffset) {
4124  ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4125  return;
4126  }
4127 
4128  // Load the list of other redeclarations from this module file.
4129  ModuleFile *M = getOwningModuleFile(FirstLocal);
4130  assert(M && "imported decl from no module file");
4131 
4132  llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4133  SavedStreamPosition SavedPosition(Cursor);
4134  if (llvm::Error JumpFailed = Cursor.JumpToBit(LocalOffset))
4135  llvm::report_fatal_error(
4136  "ASTReader::loadPendingDeclChain failed jumping: " +
4137  toString(std::move(JumpFailed)));
4138 
4139  RecordData Record;
4140  Expected<unsigned> MaybeCode = Cursor.ReadCode();
4141  if (!MaybeCode)
4142  llvm::report_fatal_error(
4143  "ASTReader::loadPendingDeclChain failed reading code: " +
4144  toString(MaybeCode.takeError()));
4145  unsigned Code = MaybeCode.get();
4146  if (Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record))
4147  assert(MaybeRecCode.get() == LOCAL_REDECLARATIONS &&
4148  "expected LOCAL_REDECLARATIONS record!");
4149  else
4150  llvm::report_fatal_error(
4151  "ASTReader::loadPendingDeclChain failed reading rec code: " +
4152  toString(MaybeCode.takeError()));
4153 
4154  // FIXME: We have several different dispatches on decl kind here; maybe
4155  // we should instead generate one loop per kind and dispatch up-front?
4156  Decl *MostRecent = FirstLocal;
4157  for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4158  auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4159  ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4160  MostRecent = D;
4161  }
4162  ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4163 }
4164 
4165 namespace {
4166 
4167  /// Given an ObjC interface, goes through the modules and links to the
4168  /// interface all the categories for it.
4169  class ObjCCategoriesVisitor {
4170  ASTReader &Reader;
4171  ObjCInterfaceDecl *Interface;
4172  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4173  ObjCCategoryDecl *Tail = nullptr;
4174  llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4175  serialization::GlobalDeclID InterfaceID;
4176  unsigned PreviousGeneration;
4177 
4178  void add(ObjCCategoryDecl *Cat) {
4179  // Only process each category once.
4180  if (!Deserialized.erase(Cat))
4181  return;
4182 
4183  // Check for duplicate categories.
4184  if (Cat->getDeclName()) {
4185  ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4186  if (Existing &&
4187  Reader.getOwningModuleFile(Existing)
4188  != Reader.getOwningModuleFile(Cat)) {
4189  // FIXME: We should not warn for duplicates in diamond:
4190  //
4191  // MT //
4192  // / \ //
4193  // ML MR //
4194  // \ / //
4195  // MB //
4196  //
4197  // If there are duplicates in ML/MR, there will be warning when
4198  // creating MB *and* when importing MB. We should not warn when
4199  // importing.
4200  Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4201  << Interface->getDeclName() << Cat->getDeclName();
4202  Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4203  } else if (!Existing) {
4204  // Record this category.
4205  Existing = Cat;
4206  }
4207  }
4208 
4209  // Add this category to the end of the chain.
4210  if (Tail)
4212  else
4213  Interface->setCategoryListRaw(Cat);
4214  Tail = Cat;
4215  }
4216 
4217  public:
4218  ObjCCategoriesVisitor(ASTReader &Reader,
4219  ObjCInterfaceDecl *Interface,
4220  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4221  serialization::GlobalDeclID InterfaceID,
4222  unsigned PreviousGeneration)
4223  : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4224  InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4225  // Populate the name -> category map with the set of known categories.
4226  for (auto *Cat : Interface->known_categories()) {
4227  if (Cat->getDeclName())
4228  NameCategoryMap[Cat->getDeclName()] = Cat;
4229 
4230  // Keep track of the tail of the category list.
4231  Tail = Cat;
4232  }
4233  }
4234 
4235  bool operator()(ModuleFile &M) {
4236  // If we've loaded all of the category information we care about from
4237  // this module file, we're done.
4238  if (M.Generation <= PreviousGeneration)
4239  return true;
4240 
4241  // Map global ID of the definition down to the local ID used in this
4242  // module file. If there is no such mapping, we'll find nothing here
4243  // (or in any module it imports).
4244  DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4245  if (!LocalID)
4246  return true;
4247 
4248  // Perform a binary search to find the local redeclarations for this
4249  // declaration (if any).
4250  const ObjCCategoriesInfo Compare = { LocalID, 0 };
4251  const ObjCCategoriesInfo *Result
4252  = std::lower_bound(M.ObjCCategoriesMap,
4254  Compare);
4255  if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4256  Result->DefinitionID != LocalID) {
4257  // We didn't find anything. If the class definition is in this module
4258  // file, then the module files it depends on cannot have any categories,
4259  // so suppress further lookup.
4260  return Reader.isDeclIDFromModule(InterfaceID, M);
4261  }
4262 
4263  // We found something. Dig out all of the categories.
4264  unsigned Offset = Result->Offset;
4265  unsigned N = M.ObjCCategories[Offset];
4266  M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4267  for (unsigned I = 0; I != N; ++I)
4268  add(cast_or_null<ObjCCategoryDecl>(
4269  Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4270  return true;
4271  }
4272  };
4273 
4274 } // namespace
4275 
4276 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4277  ObjCInterfaceDecl *D,
4278  unsigned PreviousGeneration) {
4279  ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4280  PreviousGeneration);
4281  ModuleMgr.visit(Visitor);
4282 }
4283 
4284 template<typename DeclT, typename Fn>
4285 static void forAllLaterRedecls(DeclT *D, Fn F) {
4286  F(D);
4287 
4288  // Check whether we've already merged D into its redeclaration chain.
4289  // MostRecent may or may not be nullptr if D has not been merged. If
4290  // not, walk the merged redecl chain and see if it's there.
4291  auto *MostRecent = D->getMostRecentDecl();
4292  bool Found = false;
4293  for (auto *Redecl = MostRecent; Redecl && !Found;
4294  Redecl = Redecl->getPreviousDecl())
4295  Found = (Redecl == D);
4296 
4297  // If this declaration is merged, apply the functor to all later decls.
4298  if (Found) {
4299  for (auto *Redecl = MostRecent; Redecl != D;
4300  Redecl = Redecl->getPreviousDecl())
4301  F(Redecl);
4302  }
4303 }
4304 
4306  llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4307  while (Record.getIdx() < Record.size()) {
4308  switch ((DeclUpdateKind)Record.readInt()) {
4310  auto *RD = cast<CXXRecordDecl>(D);
4311  // FIXME: If we also have an update record for instantiating the
4312  // definition of D, we need that to happen before we get here.
4313  Decl *MD = Record.readDecl();
4314  assert(MD && "couldn't read decl from update record");
4315  // FIXME: We should call addHiddenDecl instead, to add the member
4316  // to its DeclContext.
4317  RD->addedMember(MD);
4318  break;
4319  }
4320 
4322  // It will be added to the template's lazy specialization set.
4323  PendingLazySpecializationIDs.push_back(ReadDeclID());
4324  break;
4325 
4327  auto *Anon = ReadDeclAs<NamespaceDecl>();
4328 
4329  // Each module has its own anonymous namespace, which is disjoint from
4330  // any other module's anonymous namespaces, so don't attach the anonymous
4331  // namespace at all.
4332  if (!Record.isModule()) {
4333  if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4334  TU->setAnonymousNamespace(Anon);
4335  else
4336  cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4337  }
4338  break;
4339  }
4340 
4342  auto *VD = cast<VarDecl>(D);
4343  VD->NonParmVarDeclBits.IsInline = Record.readInt();
4344  VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4345  uint64_t Val = Record.readInt();
4346  if (Val && !VD->getInit()) {
4347  VD->setInit(Record.readExpr());
4348  if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4349  EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4350  Eval->CheckedICE = true;
4351  Eval->IsICE = Val == 3;
4352  }
4353  }
4354  break;
4355  }
4356 
4358  SourceLocation POI = Record.readSourceLocation();
4359  if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4360  VTSD->setPointOfInstantiation(POI);
4361  } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4362  VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4363  } else {
4364  auto *FD = cast<FunctionDecl>(D);
4365  if (auto *FTSInfo = FD->TemplateOrSpecialization
4366  .dyn_cast<FunctionTemplateSpecializationInfo *>())
4367  FTSInfo->setPointOfInstantiation(POI);
4368  else
4369  FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4370  ->setPointOfInstantiation(POI);
4371  }
4372  break;
4373  }
4374 
4376  auto *Param = cast<ParmVarDecl>(D);
4377 
4378  // We have to read the default argument regardless of whether we use it
4379  // so that hypothetical further update records aren't messed up.
4380  // TODO: Add a function to skip over the next expr record.
4381  auto *DefaultArg = Record.readExpr();
4382 
4383  // Only apply the update if the parameter still has an uninstantiated
4384  // default argument.
4385  if (Param->hasUninstantiatedDefaultArg())
4386  Param->setDefaultArg(DefaultArg);
4387  break;
4388  }
4389 
4391  auto *FD = cast<FieldDecl>(D);
4392  auto *DefaultInit = Record.readExpr();
4393 
4394  // Only apply the update if the field still has an uninstantiated
4395  // default member initializer.
4396  if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4397  if (DefaultInit)
4398  FD->setInClassInitializer(DefaultInit);
4399  else
4400  // Instantiation failed. We can get here if we serialized an AST for
4401  // an invalid program.
4402  FD->removeInClassInitializer();
4403  }
4404  break;
4405  }
4406 
4408  auto *FD = cast<FunctionDecl>(D);
4409  if (Reader.PendingBodies[FD]) {
4410  // FIXME: Maybe check for ODR violations.
4411  // It's safe to stop now because this update record is always last.
4412  return;
4413  }
4414 
4415  if (Record.readInt()) {
4416  // Maintain AST consistency: any later redeclarations of this function
4417  // are inline if this one is. (We might have merged another declaration
4418  // into this one.)
4419  forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4420  FD->setImplicitlyInline();
4421  });
4422  }
4423  FD->setInnerLocStart(ReadSourceLocation());
4424  ReadFunctionDefinition(FD);
4425  assert(Record.getIdx() == Record.size() && "lazy body must be last");
4426  break;
4427  }
4428 
4430  auto *RD = cast<CXXRecordDecl>(D);
4431  auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4432  bool HadRealDefinition =
4433  OldDD && (OldDD->Definition != RD ||
4434  !Reader.PendingFakeDefinitionData.count(OldDD));
4435  RD->setParamDestroyedInCallee(Record.readInt());
4436  RD->setArgPassingRestrictions(
4437  (RecordDecl::ArgPassingKind)Record.readInt());
4438  ReadCXXRecordDefinition(RD, /*Update*/true);
4439 
4440  // Visible update is handled separately.
4441  uint64_t LexicalOffset = ReadLocalOffset();
4442  if (!HadRealDefinition && LexicalOffset) {
4443  Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4444  Reader.PendingFakeDefinitionData.erase(OldDD);
4445  }
4446 
4447  auto TSK = (TemplateSpecializationKind)Record.readInt();
4448  SourceLocation POI = ReadSourceLocation();
4449  if (MemberSpecializationInfo *MSInfo =
4450  RD->getMemberSpecializationInfo()) {
4451  MSInfo->setTemplateSpecializationKind(TSK);
4452  MSInfo->setPointOfInstantiation(POI);
4453  } else {
4454  auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4455  Spec->setTemplateSpecializationKind(TSK);
4456  Spec->setPointOfInstantiation(POI);
4457 
4458  if (Record.readInt()) {
4459  auto *PartialSpec =
4460  ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4462  Record.readTemplateArgumentList(TemplArgs);
4463  auto *TemplArgList = TemplateArgumentList::CreateCopy(
4464  Reader.getContext(), TemplArgs);
4465 
4466  // FIXME: If we already have a partial specialization set,
4467  // check that it matches.
4468  if (!Spec->getSpecializedTemplateOrPartial()
4470  Spec->setInstantiationOf(PartialSpec, TemplArgList);
4471  }
4472  }
4473 
4474  RD->setTagKind((TagTypeKind)Record.readInt());
4475  RD->setLocation(ReadSourceLocation());
4476  RD->setLocStart(ReadSourceLocation());
4477  RD->setBraceRange(ReadSourceRange());
4478 
4479  if (Record.readInt()) {
4480  AttrVec Attrs;
4481  Record.readAttributes(Attrs);
4482  // If the declaration already has attributes, we assume that some other
4483  // AST file already loaded them.
4484  if (!D->hasAttrs())
4485  D->setAttrsImpl(Attrs, Reader.getContext());
4486  }
4487  break;
4488  }
4489 
4491  // Set the 'operator delete' directly to avoid emitting another update
4492  // record.
4493  auto *Del = ReadDeclAs<FunctionDecl>();
4494  auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4495  auto *ThisArg = Record.readExpr();
4496  // FIXME: Check consistency if we have an old and new operator delete.
4497  if (!First->OperatorDelete) {
4498  First->OperatorDelete = Del;
4499  First->OperatorDeleteThisArg = ThisArg;
4500  }
4501  break;
4502  }
4503 
4506  SmallVector<QualType, 8> ExceptionStorage;
4507  Record.readExceptionSpec(ExceptionStorage, ESI);
4508 
4509  // Update this declaration's exception specification, if needed.
4510  auto *FD = cast<FunctionDecl>(D);
4511  auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4512  // FIXME: If the exception specification is already present, check that it
4513  // matches.
4514  if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4515  FD->setType(Reader.getContext().getFunctionType(
4516  FPT->getReturnType(), FPT->getParamTypes(),
4517  FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4518 
4519  // When we get to the end of deserializing, see if there are other decls
4520  // that we need to propagate this exception specification onto.
4521  Reader.PendingExceptionSpecUpdates.insert(
4522  std::make_pair(FD->getCanonicalDecl(), FD));
4523  }
4524  break;
4525  }
4526 
4528  auto *FD = cast<FunctionDecl>(D);
4529  QualType DeducedResultType = Record.readType();
4530  Reader.PendingDeducedTypeUpdates.insert(
4531  {FD->getCanonicalDecl(), DeducedResultType});
4532  break;
4533  }
4534 
4535  case UPD_DECL_MARKED_USED:
4536  // Maintain AST consistency: any later redeclarations are used too.
4537  D->markUsed(Reader.getContext());
4538  break;
4539 
4540  case UPD_MANGLING_NUMBER:
4541  Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4542  Record.readInt());
4543  break;
4544 
4546  Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4547  Record.readInt());
4548  break;
4549 
4551  D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4552  ReadSourceRange()));
4553  break;
4554 
4556  auto AllocatorKind =
4557  static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
4558  Expr *Allocator = Record.readExpr();
4559  SourceRange SR = ReadSourceRange();
4560  D->addAttr(OMPAllocateDeclAttr::CreateImplicit(
4561  Reader.getContext(), AllocatorKind, Allocator, SR));
4562  break;
4563  }
4564 
4565  case UPD_DECL_EXPORTED: {
4566  unsigned SubmoduleID = readSubmoduleID();
4567  auto *Exported = cast<NamedDecl>(D);
4568  Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4569  Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4570  Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4571  break;
4572  }
4573 
4575  OMPDeclareTargetDeclAttr::MapTypeTy MapType =
4576  static_cast<OMPDeclareTargetDeclAttr::MapTypeTy>(Record.readInt());
4577  OMPDeclareTargetDeclAttr::DevTypeTy DevType =
4578  static_cast<OMPDeclareTargetDeclAttr::DevTypeTy>(Record.readInt());
4579  D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4580  Reader.getContext(), MapType, DevType, ReadSourceRange()));
4581  break;
4582  }
4583 
4585  AttrVec Attrs;
4586  Record.readAttributes(Attrs);
4587  assert(Attrs.size() == 1);
4588  D->addAttr(Attrs[0]);
4589  break;
4590  }
4591  }
4592 }
const uint64_t & readInt()
Returns the current value in this record, and advances to the next value.
Definition: ASTReader.h:2406
RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD)
void VisitTypeDecl(TypeDecl *TD)
void setCategoryNameLoc(SourceLocation Loc)
Definition: DeclObjC.h:2413
A FriendTemplateDecl record.
Definition: ASTBitCodes.h:1460
void setHasSkippedBody(bool Skipped=true)
Definition: Decl.h:2243
Defines the clang::ASTContext interface.
A NonTypeTemplateParmDecl record.
Definition: ASTBitCodes.h:1487
static bool isUndeducedReturnType(QualType T)
void setScopeInfo(unsigned scopeDepth, unsigned parameterIndex)
Definition: Decl.h:1597
Decl * GetLocalDecl(ModuleFile &F, uint32_t LocalID)
Reads a declaration with the given local ID in the given module.
Definition: ASTReader.h:1839
SourceLocation readSourceLocation()
Read a source location, advancing Idx.
Definition: ASTReader.h:2611
void VisitClassScopeFunctionSpecializationDecl(ClassScopeFunctionSpecializationDecl *D)
static const Decl * getCanonicalDecl(const Decl *D)
void setImplicit(bool I=true)
Definition: DeclBase.h:559
Represents a function declaration or definition.
Definition: Decl.h:1748
void setInitializerData(Expr *OrigE, Expr *PrivE)
Set initializer Orig and Priv vars.
Definition: DeclOpenMP.h:188
void setNonTrivialToPrimitiveDestroy(bool V)
Definition: Decl.h:3745
void VisitVarDecl(VarDecl *VD)
#define MATCH_FIELD(Field)
void setAnonymousStructOrUnion(bool Anon)
Definition: Decl.h:3703
A class which contains all the information about a particular captured value.
Definition: Decl.h:3897
static ImportDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumLocations)
Create a new, deserialized module import declaration.
Definition: Decl.cpp:4825
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
void VisitImportDecl(ImportDecl *D)
A (possibly-)qualified type.
Definition: Type.h:643
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:1783
Static storage duration.
Definition: Specifiers.h:309
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:3205
void VisitUsingDecl(UsingDecl *D)
static UnresolvedUsingValueDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2899
static VarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:1959
void setLParenLoc(SourceLocation L)
Definition: DeclObjC.h:824
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:1526
void setNonTrivialToPrimitiveDefaultInitialize(bool V)
Definition: Decl.h:3729
void VisitObjCIvarDecl(ObjCIvarDecl *D)
#define OR_FIELD(Field)
void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D)
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3378
This represents &#39;#pragma omp allocate ...&#39; directive.
Definition: DeclOpenMP.h:422
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:2819
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:3232
No linkage, which means that the entity is unique and can only be referred to from within its scope...
Definition: Linkage.h:26
StorageClass getStorageClass() const
Returns the storage class as written in the source.
Definition: Decl.h:1019
unsigned Generation
The generation of which this module file is a part.
Definition: Module.h:174
static AccessSpecDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:58
Represents the declaration of a typedef-name via the &#39;typedef&#39; type specifier.
Definition: Decl.h:3051
C Language Family Type Representation.
void setParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4135
Microsoft&#39;s &#39;__super&#39; specifier, stored as a CXXRecordDecl* of the class it appeared in...
unsigned clauselist_size() const
Definition: DeclOpenMP.h:488
An OMPDeclareReductionDecl record.
Definition: ASTBitCodes.h:1553
void VisitEnumConstantDecl(EnumConstantDecl *ECD)
static PragmaCommentDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned ArgSize)
Definition: Decl.cpp:4480
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:8922
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:88
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:1478
void setArgPassingRestrictions(ArgPassingKind Kind)
Definition: Decl.h:3760
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:457
void setPure(bool P=true)
Definition: Decl.cpp:2824
static Decl * getMostRecentDecl(Decl *D)
known_categories_range known_categories() const
Definition: DeclObjC.h:1686
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:1388
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:4301
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:4418
unsigned LocalNumObjCCategoriesInMap
The number of redeclaration info entries in ObjCCategoriesMap.
Definition: Module.h:438
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:2835
Declaration of a variable template.
Represent a C++ namespace.
Definition: Decl.h:514
static FunctionTemplateSpecializationInfo * Create(ASTContext &C, FunctionDecl *FD, FunctionTemplateDecl *Template, TemplateSpecializationKind TSK, const TemplateArgumentList *TemplateArgs, const TemplateArgumentListInfo *TemplateArgsAsWritten, SourceLocation POI, MemberSpecializationInfo *MSInfo)
A ObjCPropertyDecl record.
Definition: ASTBitCodes.h:1345
void setPropertyImplementation(PropertyControl pc)
Definition: DeclObjC.h:928
bool hasRedeclaration() const
True if redeclared in the same interface.
Definition: DeclObjC.h:271
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:132
static FriendDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned FriendTypeNumTPLists)
Definition: DeclFriend.cpp:65
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:112
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:184
void readQualifierInfo(QualifierInfo &Info)
Definition: ASTReader.h:2557
void setPropertyAccessor(bool isAccessor)
Definition: DeclObjC.h:435
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:25
An OMPRequiresDecl record.
Definition: ASTBitCodes.h:1529
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2574
This is a module that was defined by a module map and built out of header files.
Definition: Module.h:75
static CapturedDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumParams)
Definition: Decl.cpp:4612
QualType getElementType() const
Definition: Type.h:2870
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3202
Represents a #pragma comment line.
Definition: Decl.h:139
A ClassTemplateDecl record.
Definition: ASTBitCodes.h:1463
void VisitStaticAssertDecl(StaticAssertDecl *D)
A PragmaDetectMismatchDecl record.
Definition: ASTBitCodes.h:1547
An UnresolvedUsingTypenameDecl record.
Definition: ASTBitCodes.h:1427
An identifier, stored as an IdentifierInfo*.
void setNothrow(bool Nothrow=true)
Definition: Decl.cpp:4622
void setRAngleLoc(SourceLocation Loc)
Definition: TemplateBase.h:574
FriendDecl - Represents the declaration of a friend entity, which can be a function, a type, or a templated function or type.
Definition: DeclFriend.h:53
unsigned getODRHash()
Definition: Decl.cpp:4226
Represents a variable declaration or definition.
Definition: Decl.h:812
void VisitNamedDecl(NamedDecl *ND)
Declaration of a redeclarable template.
Definition: DeclTemplate.h:793
for(auto typeArg :T->getTypeArgsAsWritten())
An OMPCapturedExprDecl record.
Definition: ASTBitCodes.h:1541
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6824
A UsingShadowDecl record.
Definition: ASTBitCodes.h:1415
const unsigned int NUM_PREDEF_DECL_IDS
The number of declaration IDs that are predefined.
Definition: ASTBitCodes.h:1282
The "__interface" keyword.
Definition: Type.h:5097
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:138
A TemplateTemplateParmDecl record that stores an expanded template template parameter pack...
Definition: ASTBitCodes.h:1516
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:67
unsigned getODRHash() const
Definition: DeclCXX.cpp:474
void setSelfDecl(ImplicitParamDecl *SD)
Definition: DeclObjC.h:414
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:1490
Represents a parameter to a function.
Definition: Decl.h:1564
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:23
static OMPDeclareMapperDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned N)
Creates deserialized declare mapper node.
Definition: DeclOpenMP.cpp:183
A ObjCInterfaceDecl record.
Definition: ASTBitCodes.h:1321
Module * getSubmodule(serialization::SubmoduleID GlobalID)
Retrieve the submodule that corresponds to a global submodule ID.
Definition: ASTReader.h:2421
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:132
Represents a struct/union/class.
Definition: Decl.h:3626
Description of a constructor that was inherited from a base class.
Definition: DeclCXX.h:2548
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:84
ObjCProtocolDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this Objective-C protocol.
Definition: DeclObjC.h:2249
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:3522
T * readDeclAs()
Reads a declaration from the given position in the record, advancing Idx.
Definition: ASTReader.h:2533
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:40
void setManglingNumber(const NamedDecl *ND, unsigned Number)
void setUninstantiatedDefaultArg(Expr *arg)
Definition: Decl.cpp:2691
static IndirectFieldDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4658
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:1195
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:3001
static std::string toString(const clang::SanitizerSet &Sanitizers)
Produce a string containing comma-separated names of sanitizers in Sanitizers set.
LambdaCaptureKind
The different capture forms in a lambda introducer.
Definition: Lambda.h:33
Represents a member of a struct/union/class.
Definition: Decl.h:2607
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:156
void setVisibleDespiteOwningModule()
Set that this declaration is globally visible, even if it came from a module that is not visible...
Definition: DeclBase.h:780
ArgPassingKind
Enum that represents the different ways arguments are passed to and returned from function calls...
Definition: Decl.h:3635
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:2198
Helper class that saves the current stream position and then restores it when destroyed.
Definition: ASTReader.h:2679
static NamespaceDecl * getNamespace(const NestedNameSpecifier *X)
void setOwningModuleID(unsigned ID)
Set the owning module ID.
Definition: DeclBase.h:630
void setStaticLocalNumber(const VarDecl *VD, unsigned Number)
void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD)
This declaration is definitely a definition.
Definition: Decl.h:1152
unsigned FromASTFile
Whether this declaration was loaded from an AST file.
Definition: DeclBase.h:328
void Profile(llvm::FoldingSetNodeID &ID)
Definition: DeclTemplate.h:648
Defines the clang::attr::Kind enum.
clang::CharUnits operator*(clang::CharUnits::QuantityType Scale, const clang::CharUnits &CU)
Definition: CharUnits.h:207
Represents an access specifier followed by colon &#39;:&#39;.
Definition: DeclCXX.h:132
void setReturnType(QualType T)
Definition: DeclObjC.h:323
Declaration of a function specialization at template class scope.
static StaticAssertDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2947
TypeSourceInfo * getTypeSourceInfo()
Reads a declarator info from the given record, advancing Idx.
Definition: ASTReader.h:2495
void VisitLabelDecl(LabelDecl *LD)
static NamespaceDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2696
void setDeclImplementation(ImplementationControl ic)
Definition: DeclObjC.h:477
Describes a module or submodule.
Definition: Module.h:64
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:1508
size_t size() const
The length of this record.
Definition: ASTReader.h:2396
static OMPCapturedExprDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclOpenMP.cpp:241
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:9626
Provides information about a function template specialization, which is a FunctionDecl that has been ...
Definition: DeclTemplate.h:512
Represents a C++ using-declaration.
Definition: DeclCXX.h:3488
void setUsingLoc(SourceLocation L)
Set the source location of the &#39;using&#39; keyword.
Definition: DeclCXX.h:3524
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:968
void setAccessControl(AccessControl ac)
Definition: DeclObjC.h:1981
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:7186
< Capturing the *this object by copy
Definition: Lambda.h:36
RedeclarableResult VisitVarDeclImpl(VarDecl *D)
DeclLink RedeclLink
Points to the next redeclaration in the chain.
Definition: Redeclarable.h:185
An AccessSpecDecl record.
Definition: ASTBitCodes.h:1454
void setAtLoc(SourceLocation L)
Definition: DeclObjC.h:821
A convenient class for passing around template argument information.
Definition: TemplateBase.h:554
void setParamDestroyedInCallee(bool V)
Definition: Decl.h:3768
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
A ConstructorUsingShadowDecl record.
Definition: ASTBitCodes.h:1418
A UsingDirecitveDecl record.
Definition: ASTBitCodes.h:1421
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:2929
void VisitCXXRecordDecl(CXXRecordDecl *D)
static ClassTemplateSpecializationDecl * CreateDeserialized(ASTContext &C, unsigned ID)
void setSuperClass(ObjCInterfaceDecl *superCls)
Definition: DeclObjC.h:2692
A DecompositionDecl record.
Definition: ASTBitCodes.h:1366
Represents a declaration of a type.
Definition: Decl.h:2907
void setHasObjectMember(bool val)
Definition: Decl.h:3708
void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D)
void VisitMSPropertyDecl(MSPropertyDecl *FD)
static ObjCCategoryImplDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:2056
void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D)
ASTContext & getContext()
Retrieve the AST context that this AST reader supplements.
Definition: ASTReader.h:2311
void setHasImplicitReturnZero(bool IRZ)
State that falling off this function implicitly returns null/zero.
Definition: Decl.h:2073
MemberSpecializationInfo * getMemberSpecializationInfo() const
If this enumeration is an instantiation of a member enumeration of a class template specialization...
Definition: Decl.h:3607
DeclID VisitTemplateDecl(TemplateDecl *D)
SourceRange readSourceRange()
Read a source range, advancing Idx.
Definition: ASTReader.h:2616
void setClassInterface(ObjCInterfaceDecl *D)
Definition: DeclObjC.h:2748
bool isPartOfPerModuleInitializer(const Decl *D)
Determine whether the given declaration will be included in the per-module initializer if it needs to...
Definition: ASTCommon.h:116
CXXRecordDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:730
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1166
static FileScopeAsmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4760
void VisitCXXMethodDecl(CXXMethodDecl *D)
void setTrivial(bool IT)
Definition: Decl.h:2041
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:4730
A ClassTemplateSpecializationDecl record.
Definition: ASTBitCodes.h:1466
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2063
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:828
static bool isSameEntity(NamedDecl *X, NamedDecl *Y)
Determine whether the two declarations refer to the same entity.
Represents the body of a CapturedStmt, and serves as its DeclContext.
Definition: Decl.h:4084
Represents an ObjC class declaration.
Definition: DeclObjC.h:1171
Represents a linkage specification.
Definition: DeclCXX.h:2962
static ParmVarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:2633
void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D)
CXXRecordDecl * getTemplatedDecl() const
Get the underlying class declarations of the template.
A binding in a decomposition declaration.
Definition: DeclCXX.h:3931
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:3422
void setInitVal(const llvm::APSInt &V)
Definition: Decl.h:2843
Ordinary names.
Definition: DeclBase.h:146
void setInitExpr(Expr *E)
Definition: Decl.h:2842
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:407
void setLocStart(SourceLocation L)
Definition: Decl.h:2935
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:877
void setHasInheritedPrototype(bool P=true)
State that this function inherited its prototype from a previous declaration.
Definition: Decl.h:2103
static std::string ReadString(const RecordData &Record, unsigned &Idx)
Definition: ASTReader.cpp:9604
void setGetterCXXConstructor(Expr *getterCXXConstructor)
Definition: DeclObjC.h:2852
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1602
StorageDuration getStorageDuration() const
Get the storage duration of this variable, per C++ [basic.stc].
Definition: Decl.h:1080
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:1929
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2758
IdentifierInfo * GetIdentifierInfo(ModuleFile &M, const RecordData &Record, unsigned &Idx)
Definition: ASTReader.h:2044
llvm::FoldingSetVector< FunctionTemplateSpecializationInfo > Specializations
The function template specializations for this function template, including explicit specializations ...
void setVariadic(bool isVar)
Definition: DeclObjC.h:427
static TemplateTypeParmDecl * CreateDeserialized(const ASTContext &C, unsigned ID)
bool hasAttr() const
Definition: DeclBase.h:542
unsigned varlist_size() const
Definition: DeclOpenMP.h:486
Represents the declaration of a typedef-name via a C++11 alias-declaration.
Definition: Decl.h:3071
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1636
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3710
RedeclarableResult VisitRedeclarable(Redeclarable< T > *D)
void setHasDestructors(bool val)
Definition: DeclObjC.h:2659
void VisitObjCContainerDecl(ObjCContainerDecl *D)
void setImplicitlyInline(bool I=true)
Flag that this function is implicitly inline.
Definition: Decl.h:2386
static ObjCCompatibleAliasDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:2207
void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D)
CXXDestructorDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:2877
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:688
A CXXDeductionGuideDecl record.
Definition: ASTBitCodes.h:1439
void VisitParmVarDecl(ParmVarDecl *PD)
void setStorageClass(StorageClass SClass)
Sets the storage class as written in the source.
Definition: Decl.h:2371
void VisitLinkageSpecDecl(LinkageSpecDecl *D)
static OMPRequiresDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned N)
Create deserialized requires node.
Definition: DeclOpenMP.cpp:115
void setIvarRBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2696
A StaticAssertDecl record.
Definition: ASTBitCodes.h:1499
A VarTemplateSpecializationDecl record.
Definition: ASTBitCodes.h:1475
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:1979
void setSynthesize(bool synth)
Definition: DeclObjC.h:1989
This represents &#39;#pragma omp requires...&#39; directive.
Definition: DeclOpenMP.h:345
void VisitFriendDecl(FriendDecl *D)
unsigned Offset
Definition: Format.cpp:1749
An ObjCTypeParamDecl record.
Definition: ASTBitCodes.h:1538
void VisitDecl(Decl *D)
A record containing CXXBaseSpecifiers.
Definition: ASTBitCodes.h:1502
DiagnosticBuilder Diag(unsigned DiagID) const
Report a diagnostic.
Definition: ASTReader.cpp:9645
void setTrivialForCall(bool IT)
Definition: Decl.h:2044
void setType(QualType T, TypeSourceInfo *TSI)
Definition: DeclObjC.h:830
TemplateParameterList * getTemplateParameters() const
Get the list of template parameters.
Definition: DeclTemplate.h:436
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:883
void setGetterMethodDecl(ObjCMethodDecl *gDecl)
Definition: DeclObjC.h:922
Represents a shadow constructor declaration introduced into a class by a C++11 using-declaration that...
Definition: DeclCXX.h:3376
Represents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3891
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:108
A ObjCCategoryImplDecl record.
Definition: ASTBitCodes.h:1336
Defines the clang::LangOptions interface.
void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD)
void setBitWidth(Expr *Width)
Set the bit-field width for this member.
Definition: Decl.h:2709
static LinkageSpecDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2641
A ObjCPropertyImplDecl record.
Definition: ASTBitCodes.h:1348
StateNode * Previous
Declaration of a template type parameter.
void setSetterMethodDecl(ObjCMethodDecl *gDecl)
Definition: DeclObjC.h:925
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:6889
#define V(N, I)
Definition: ASTContext.h:2898
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2838
Expected< unsigned > readRecord(llvm::BitstreamCursor &Cursor, unsigned AbbrevID)
Reads a record with id AbbrevID from Cursor, resetting the internal state.
const internal::VariadicAllOfMatcher< Decl > decl
Matches declarations.
void setInit(Expr *I)
Definition: Decl.cpp:2239
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:131
A CXXConstructorDecl record.
Definition: ASTBitCodes.h:1445
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:729
void setContextParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4153
void setAtEndRange(SourceRange atEnd)
Definition: DeclObjC.h:1123
void setRBraceLoc(SourceLocation L)
Definition: DeclCXX.h:3013
static DeclLink PreviousDeclLink(decl_type *D)
Definition: Redeclarable.h:166
void setRelatedResultType(bool RRT=true)
Note whether this method has a related result type.
Definition: DeclObjC.h:261
DeclContext * getDeclContext()
Definition: DeclBase.h:438
SourceRange ReadSourceRange(ModuleFile &F, const RecordData &Record, unsigned &Idx)
Read a source range.
Definition: ASTReader.cpp:9518
A record containing CXXCtorInitializers.
Definition: ASTBitCodes.h:1505
A VarTemplateDecl record.
Definition: ASTBitCodes.h:1472
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:1433
void setMemberSpecialization()
Note that this member template is a specialization.
Definition: DeclTemplate.h:941
Decl * readDecl()
Reads a declaration from the given position in a record in the given module, advancing Idx...
Definition: ASTReader.h:2523
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:2446
void setDefined(bool isDefined)
Definition: DeclObjC.h:440
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:200
void VisitConceptDecl(ConceptDecl *D)
void setCompleteDefinitionRequired(bool V=true)
True if this complete decl is required to be complete for some existing use.
Definition: Decl.h:3217
RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D)
Information about a module that has been loaded by the ASTReader.
Definition: Module.h:107
A namespace alias, stored as a NamespaceAliasDecl*.
void setLateTemplateParsed(bool ILT=true)
State that this templated function will be late parsed.
Definition: Decl.h:2032
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:2197
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:2402
A CXXDestructorDecl record.
Definition: ASTBitCodes.h:1448
void VisitOMPRequiresDecl(OMPRequiresDecl *D)
SmallVector< uint64_t, 1 > ObjCCategories
The Objective-C category lists for categories known to this module.
Definition: Module.h:442
A NonTypeTemplateParmDecl record that stores an expanded non-type template parameter pack...
Definition: ASTBitCodes.h:1512
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
static NamespaceAliasDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2758
bool isFunctionOrMethod() const
Definition: DeclBase.h:1824
StorageClass
Storage classes.
Definition: Specifiers.h:234
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:432
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:14
This declaration has an owning module, and is visible when that module is imported.
A NamespaceAliasDecl record.
Definition: ASTBitCodes.h:1406
void setTypename(bool TN)
Sets whether the using declaration has &#39;typename&#39;.
Definition: DeclCXX.h:3546
Declaration of an alias template.
void setModedTypeSourceInfo(TypeSourceInfo *unmodedTSI, QualType modedTy)
Definition: Decl.h:3015
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:1373
void setLocation(SourceLocation L)
Definition: DeclBase.h:430
TemplateTemplateParmDecl - Declares a template template parameter, e.g., "T" in.
void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D)
An ImplicitParamDecl record.
Definition: ASTBitCodes.h:1360
void setIvarRBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2417
void VisitDecompositionDecl(DecompositionDecl *DD)
void setIsRedeclaration(bool RD)
Definition: DeclObjC.h:267
Represents a C++ deduction guide declaration.
Definition: DeclCXX.h:2056
Represents a C++ conversion function within a class.
Definition: DeclCXX.h:2899
static UsingDirectiveDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2662
An EnumConstantDecl record.
Definition: ASTBitCodes.h:1312
static ObjCTypeParamDecl * CreateDeserialized(ASTContext &ctx, unsigned ID)
Definition: DeclObjC.cpp:1400
std::string readString()
Read a string, advancing Idx.
Definition: ASTReader.h:2638
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:708
void VisitNamespaceAliasDecl(NamespaceAliasDecl *D)
void setHasSkippedBody(bool Skipped=true)
Definition: DeclObjC.h:465
An ImportDecl recording a module import.
Definition: ASTBitCodes.h:1523
A ObjCCategoryDecl record.
Definition: ASTBitCodes.h:1333
void setDoesNotEscape(bool B=true)
Definition: Decl.h:4043
void setDeclContext(DeclContext *DC)
setDeclContext - Set both the semantic and lexical DeclContext to DC.
Definition: DeclBase.cpp:294
static ObjCMethodDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:821
This file defines OpenMP AST classes for clauses.
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:215
static OMPAllocateDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NVars, unsigned NClauses)
Definition: DeclOpenMP.cpp:74
void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D)
void VisitObjCProtocolDecl(ObjCProtocolDecl *D)
A ObjCCompatibleAliasDecl record.
Definition: ASTBitCodes.h:1342
void setHasExternalVisibleStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:2354
Attr * ReadAttr(ModuleFile &M, const RecordData &Record, unsigned &Idx)
Reads one attribute from the current stream position.
bool hasAttrs() const
Definition: DeclBase.h:484
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:3997
static TypeAliasTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty alias template node.
void setIsVariadic(bool value)
Definition: Decl.h:3967
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:4506
uint32_t SubmoduleID
An ID number that refers to a submodule in a module file.
Definition: ASTBitCodes.h:171
Represents a C++ Modules TS module export declaration.
Definition: Decl.h:4254
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:4038
void setColonLoc(SourceLocation CLoc)
Sets the location of the colon.
Definition: DeclCXX.h:157
An UnresolvedUsingValueDecl record.
Definition: ASTBitCodes.h:1424
The "struct" keyword.
Definition: Type.h:5094
void VisitDeclaratorDecl(DeclaratorDecl *DD)
static ObjCProtocolDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:1866
static EnumConstantDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4632
Kind
static UsingShadowDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2782
decl_type * getPreviousDecl()
Return the previous declaration of this declaration or NULL if this is the first declaration.
Definition: Redeclarable.h:203
static void markIncompleteDeclChainImpl(Redeclarable< DeclT > *D)
static CXXDestructorDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2565
Encodes a location in the source.
static EmptyDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4772
QualType getReturnType() const
Definition: Type.h:3636
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:597
static TemplateTemplateParmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:791
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:1397
Pseudo declaration for capturing expressions.
Definition: DeclOpenMP.h:312
void setIvarLBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2415
void setBraceRange(SourceRange R)
Definition: Decl.h:3179
void setAtStartLoc(SourceLocation Loc)
Definition: DeclObjC.h:1116
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:3240
void setObjCDeclQualifier(ObjCDeclQualifier QV)
Definition: DeclObjC.h:250
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3097
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:376
static DecompositionDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumBindings)
Definition: DeclCXX.cpp:2996
Defines several types used to describe C++ lambda expressions that are shared between the parser and ...
void setReferenced(bool R=true)
Definition: DeclBase.h:588
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:855
Represents a dependent using declaration which was not marked with typename.
Definition: DeclCXX.h:3707
void setPosition(unsigned P)
void setIsCopyDeductionCandidate(bool isCDC=true)
Definition: DeclCXX.h:2097
void VisitObjCImplDecl(ObjCImplDecl *D)
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2114
void setDefaulted(bool D=true)
Definition: Decl.h:2049
void setHasFlexibleArrayMember(bool V)
Definition: Decl.h:3684
EnumDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.h:3438
Represents a C++ nested name specifier, such as "\::std::vector<int>::".
void VisitBindingDecl(BindingDecl *BD)
A TemplateTypeParmDecl record.
Definition: ASTBitCodes.h:1484
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:222
Data that is common to all of the declarations of a given function template.
const ArrayType * getAsArrayType(QualType T) const
Type Query functions.
ObjCCategoryDecl - Represents a category declaration.
Definition