clang  9.0.0svn
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/Bitcode/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  RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
386  void VisitClassTemplateDecl(ClassTemplateDecl *D);
387  void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
388  void VisitVarTemplateDecl(VarTemplateDecl *D);
389  void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
390  void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
391  void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
392  void VisitUsingDecl(UsingDecl *D);
393  void VisitUsingPackDecl(UsingPackDecl *D);
394  void VisitUsingShadowDecl(UsingShadowDecl *D);
395  void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
396  void VisitLinkageSpecDecl(LinkageSpecDecl *D);
397  void VisitExportDecl(ExportDecl *D);
398  void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
399  void VisitImportDecl(ImportDecl *D);
400  void VisitAccessSpecDecl(AccessSpecDecl *D);
401  void VisitFriendDecl(FriendDecl *D);
402  void VisitFriendTemplateDecl(FriendTemplateDecl *D);
403  void VisitStaticAssertDecl(StaticAssertDecl *D);
404  void VisitBlockDecl(BlockDecl *BD);
405  void VisitCapturedDecl(CapturedDecl *CD);
406  void VisitEmptyDecl(EmptyDecl *D);
407 
408  std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
409 
410  template<typename T>
411  RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
412 
413  template<typename T>
414  void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
415  DeclID TemplatePatternID = 0);
416 
417  template<typename T>
418  void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
419  RedeclarableResult &Redecl,
420  DeclID TemplatePatternID = 0);
421 
422  template<typename T>
423  void mergeMergeable(Mergeable<T> *D);
424 
425  void mergeTemplatePattern(RedeclarableTemplateDecl *D,
426  RedeclarableTemplateDecl *Existing,
427  DeclID DsID, bool IsKeyDecl);
428 
429  ObjCTypeParamList *ReadObjCTypeParamList();
430 
431  // FIXME: Reorder according to DeclNodes.td?
432  void VisitObjCMethodDecl(ObjCMethodDecl *D);
433  void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
434  void VisitObjCContainerDecl(ObjCContainerDecl *D);
435  void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
436  void VisitObjCIvarDecl(ObjCIvarDecl *D);
437  void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
438  void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
439  void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
440  void VisitObjCImplDecl(ObjCImplDecl *D);
441  void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
442  void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
443  void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
444  void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
445  void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
446  void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
447  void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
448  void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
449  void VisitOMPRequiresDecl(OMPRequiresDecl *D);
450  void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
451  };
452 
453 } // namespace clang
454 
455 namespace {
456 
457 /// Iterator over the redeclarations of a declaration that have already
458 /// been merged into the same redeclaration chain.
459 template<typename DeclT>
460 class MergedRedeclIterator {
461  DeclT *Start;
462  DeclT *Canonical = nullptr;
463  DeclT *Current = nullptr;
464 
465 public:
466  MergedRedeclIterator() = default;
467  MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
468 
469  DeclT *operator*() { return Current; }
470 
471  MergedRedeclIterator &operator++() {
472  if (Current->isFirstDecl()) {
473  Canonical = Current;
474  Current = Current->getMostRecentDecl();
475  } else
476  Current = Current->getPreviousDecl();
477 
478  // If we started in the merged portion, we'll reach our start position
479  // eventually. Otherwise, we'll never reach it, but the second declaration
480  // we reached was the canonical declaration, so stop when we see that one
481  // again.
482  if (Current == Start || Current == Canonical)
483  Current = nullptr;
484  return *this;
485  }
486 
487  friend bool operator!=(const MergedRedeclIterator &A,
488  const MergedRedeclIterator &B) {
489  return A.Current != B.Current;
490  }
491 };
492 
493 } // namespace
494 
495 template <typename DeclT>
496 static llvm::iterator_range<MergedRedeclIterator<DeclT>>
497 merged_redecls(DeclT *D) {
498  return llvm::make_range(MergedRedeclIterator<DeclT>(D),
499  MergedRedeclIterator<DeclT>());
500 }
501 
502 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
503  return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
504 }
505 
507  if (Record.readInt())
508  Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
509  if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
510  CD->setNumCtorInitializers(Record.readInt());
511  if (CD->getNumCtorInitializers())
512  CD->CtorInitializers = ReadGlobalOffset();
513  }
514  // Store the offset of the body so we can lazily load it later.
515  Reader.PendingBodies[FD] = GetCurrentCursorOffset();
516  HasPendingBody = true;
517 }
518 
521 
522  // At this point we have deserialized and merged the decl and it is safe to
523  // update its canonical decl to signal that the entire entity is used.
524  D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
525  IsDeclMarkedUsed = false;
526 
527  if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
528  if (auto *TInfo = DD->getTypeSourceInfo())
529  Record.readTypeLoc(TInfo->getTypeLoc());
530  }
531 
532  if (auto *TD = dyn_cast<TypeDecl>(D)) {
533  // We have a fully initialized TypeDecl. Read its type now.
534  TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
535 
536  // If this is a tag declaration with a typedef name for linkage, it's safe
537  // to load that typedef now.
538  if (NamedDeclForTagDecl)
539  cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
540  cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
541  } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
542  // if we have a fully initialized TypeDecl, we can safely read its type now.
543  ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
544  } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
545  // FunctionDecl's body was written last after all other Stmts/Exprs.
546  // We only read it if FD doesn't already have a body (e.g., from another
547  // module).
548  // FIXME: Can we diagnose ODR violations somehow?
549  if (Record.readInt())
550  ReadFunctionDefinition(FD);
551  }
552 }
553 
555  if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
556  isa<ParmVarDecl>(D)) {
557  // We don't want to deserialize the DeclContext of a template
558  // parameter or of a parameter of a function template immediately. These
559  // entities might be used in the formulation of its DeclContext (for
560  // example, a function parameter can be used in decltype() in trailing
561  // return type of the function). Use the translation unit DeclContext as a
562  // placeholder.
563  GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID();
564  GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID();
565  if (!LexicalDCIDForTemplateParmDecl)
566  LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
567  Reader.addPendingDeclContextInfo(D,
568  SemaDCIDForTemplateParmDecl,
569  LexicalDCIDForTemplateParmDecl);
570  D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
571  } else {
572  auto *SemaDC = ReadDeclAs<DeclContext>();
573  auto *LexicalDC = ReadDeclAs<DeclContext>();
574  if (!LexicalDC)
575  LexicalDC = SemaDC;
576  DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
577  // Avoid calling setLexicalDeclContext() directly because it uses
578  // Decl::getASTContext() internally which is unsafe during derialization.
579  D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
580  Reader.getContext());
581  }
582  D->setLocation(ThisDeclLoc);
583  D->setInvalidDecl(Record.readInt());
584  if (Record.readInt()) { // hasAttrs
585  AttrVec Attrs;
586  Record.readAttributes(Attrs);
587  // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
588  // internally which is unsafe during derialization.
589  D->setAttrsImpl(Attrs, Reader.getContext());
590  }
591  D->setImplicit(Record.readInt());
592  D->Used = Record.readInt();
593  IsDeclMarkedUsed |= D->Used;
594  D->setReferenced(Record.readInt());
595  D->setTopLevelDeclInObjCContainer(Record.readInt());
596  D->setAccess((AccessSpecifier)Record.readInt());
597  D->FromASTFile = true;
598  bool ModulePrivate = Record.readInt();
599 
600  // Determine whether this declaration is part of a (sub)module. If so, it
601  // may not yet be visible.
602  if (unsigned SubmoduleID = readSubmoduleID()) {
603  // Store the owning submodule ID in the declaration.
608 
609  if (ModulePrivate) {
610  // Module-private declarations are never visible, so there is no work to
611  // do.
612  } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
613  // If local visibility is being tracked, this declaration will become
614  // hidden and visible as the owning module does.
615  } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
616  // Mark the declaration as visible when its owning module becomes visible.
617  if (Owner->NameVisibility == Module::AllVisible)
619  else
620  Reader.HiddenNamesMap[Owner].push_back(D);
621  }
622  } else if (ModulePrivate) {
624  }
625 }
626 
628  VisitDecl(D);
629  D->setLocation(ReadSourceLocation());
630  D->CommentKind = (PragmaMSCommentKind)Record.readInt();
631  std::string Arg = ReadString();
632  memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
633  D->getTrailingObjects<char>()[Arg.size()] = '\0';
634 }
635 
637  VisitDecl(D);
638  D->setLocation(ReadSourceLocation());
639  std::string Name = ReadString();
640  memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
641  D->getTrailingObjects<char>()[Name.size()] = '\0';
642 
643  D->ValueStart = Name.size() + 1;
644  std::string Value = ReadString();
645  memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
646  Value.size());
647  D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
648 }
649 
651  llvm_unreachable("Translation units are not serialized");
652 }
653 
655  VisitDecl(ND);
656  ND->setDeclName(Record.readDeclarationName());
657  AnonymousDeclNumber = Record.readInt();
658 }
659 
661  VisitNamedDecl(TD);
662  TD->setLocStart(ReadSourceLocation());
663  // Delay type reading until after we have fully initialized the decl.
664  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
665 }
666 
667 ASTDeclReader::RedeclarableResult
669  RedeclarableResult Redecl = VisitRedeclarable(TD);
670  VisitTypeDecl(TD);
671  TypeSourceInfo *TInfo = GetTypeSourceInfo();
672  if (Record.readInt()) { // isModed
673  QualType modedT = Record.readType();
674  TD->setModedTypeSourceInfo(TInfo, modedT);
675  } else
676  TD->setTypeSourceInfo(TInfo);
677  // Read and discard the declaration for which this is a typedef name for
678  // linkage, if it exists. We cannot rely on our type to pull in this decl,
679  // because it might have been merged with a type from another module and
680  // thus might not refer to our version of the declaration.
681  ReadDecl();
682  return Redecl;
683 }
684 
686  RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
687  mergeRedeclarable(TD, Redecl);
688 }
689 
691  RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
692  if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>())
693  // Merged when we merge the template.
694  TD->setDescribedAliasTemplate(Template);
695  else
696  mergeRedeclarable(TD, Redecl);
697 }
698 
699 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
700  RedeclarableResult Redecl = VisitRedeclarable(TD);
701  VisitTypeDecl(TD);
702 
703  TD->IdentifierNamespace = Record.readInt();
704  TD->setTagKind((TagDecl::TagKind)Record.readInt());
705  if (!isa<CXXRecordDecl>(TD))
706  TD->setCompleteDefinition(Record.readInt());
707  TD->setEmbeddedInDeclarator(Record.readInt());
708  TD->setFreeStanding(Record.readInt());
709  TD->setCompleteDefinitionRequired(Record.readInt());
710  TD->setBraceRange(ReadSourceRange());
711 
712  switch (Record.readInt()) {
713  case 0:
714  break;
715  case 1: { // ExtInfo
716  auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
717  ReadQualifierInfo(*Info);
718  TD->TypedefNameDeclOrQualifier = Info;
719  break;
720  }
721  case 2: // TypedefNameForAnonDecl
722  NamedDeclForTagDecl = ReadDeclID();
723  TypedefNameForLinkage = Record.getIdentifierInfo();
724  break;
725  default:
726  llvm_unreachable("unexpected tag info kind");
727  }
728 
729  if (!isa<CXXRecordDecl>(TD))
730  mergeRedeclarable(TD, Redecl);
731  return Redecl;
732 }
733 
735  VisitTagDecl(ED);
736  if (TypeSourceInfo *TI = GetTypeSourceInfo())
737  ED->setIntegerTypeSourceInfo(TI);
738  else
739  ED->setIntegerType(Record.readType());
740  ED->setPromotionType(Record.readType());
741  ED->setNumPositiveBits(Record.readInt());
742  ED->setNumNegativeBits(Record.readInt());
743  ED->setScoped(Record.readInt());
744  ED->setScopedUsingClassTag(Record.readInt());
745  ED->setFixed(Record.readInt());
746 
747  ED->setHasODRHash(true);
748  ED->ODRHash = Record.readInt();
749 
750  // If this is a definition subject to the ODR, and we already have a
751  // definition, merge this one into it.
752  if (ED->isCompleteDefinition() &&
753  Reader.getContext().getLangOpts().Modules &&
754  Reader.getContext().getLangOpts().CPlusPlus) {
755  EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
756  if (!OldDef) {
757  // This is the first time we've seen an imported definition. Look for a
758  // local definition before deciding that we are the first definition.
759  for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
760  if (!D->isFromASTFile() && D->isCompleteDefinition()) {
761  OldDef = D;
762  break;
763  }
764  }
765  }
766  if (OldDef) {
767  Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
768  ED->setCompleteDefinition(false);
769  Reader.mergeDefinitionVisibility(OldDef, ED);
770  if (OldDef->getODRHash() != ED->getODRHash())
771  Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
772  } else {
773  OldDef = ED;
774  }
775  }
776 
777  if (auto *InstED = ReadDeclAs<EnumDecl>()) {
778  auto TSK = (TemplateSpecializationKind)Record.readInt();
779  SourceLocation POI = ReadSourceLocation();
780  ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
782  }
783 }
784 
785 ASTDeclReader::RedeclarableResult
787  RedeclarableResult Redecl = VisitTagDecl(RD);
788  RD->setHasFlexibleArrayMember(Record.readInt());
789  RD->setAnonymousStructOrUnion(Record.readInt());
790  RD->setHasObjectMember(Record.readInt());
791  RD->setHasVolatileMember(Record.readInt());
792  RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
793  RD->setNonTrivialToPrimitiveCopy(Record.readInt());
794  RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
795  RD->setParamDestroyedInCallee(Record.readInt());
797  return Redecl;
798 }
799 
801  VisitNamedDecl(VD);
802  // For function declarations, defer reading the type in case the function has
803  // a deduced return type that references an entity declared within the
804  // function.
805  if (isa<FunctionDecl>(VD))
806  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
807  else
808  VD->setType(Record.readType());
809 }
810 
812  VisitValueDecl(ECD);
813  if (Record.readInt())
814  ECD->setInitExpr(Record.readExpr());
815  ECD->setInitVal(Record.readAPSInt());
816  mergeMergeable(ECD);
817 }
818 
820  VisitValueDecl(DD);
821  DD->setInnerLocStart(ReadSourceLocation());
822  if (Record.readInt()) { // hasExtInfo
823  auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
824  ReadQualifierInfo(*Info);
825  DD->DeclInfo = Info;
826  }
827  QualType TSIType = Record.readType();
828  DD->setTypeSourceInfo(
829  TSIType.isNull() ? nullptr
830  : Reader.getContext().CreateTypeSourceInfo(TSIType));
831 }
832 
834  RedeclarableResult Redecl = VisitRedeclarable(FD);
835  VisitDeclaratorDecl(FD);
836 
837  // Attach a type to this function. Use the real type if possible, but fall
838  // back to the type as written if it involves a deduced return type.
839  if (FD->getTypeSourceInfo() &&
841  ->getReturnType()->getContainedAutoType()) {
842  // We'll set up the real type in Visit, once we've finished loading the
843  // function.
844  FD->setType(FD->getTypeSourceInfo()->getType());
845  Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
846  } else {
847  FD->setType(Reader.GetType(DeferredTypeID));
848  }
849  DeferredTypeID = 0;
850 
851  ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName());
852  FD->IdentifierNamespace = Record.readInt();
853 
854  // FunctionDecl's body is handled last at ASTDeclReader::Visit,
855  // after everything else is read.
856 
857  FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
858  FD->setInlineSpecified(Record.readInt());
859  FD->setImplicitlyInline(Record.readInt());
860  FD->setExplicitSpecified(Record.readInt());
861  FD->setVirtualAsWritten(Record.readInt());
862  FD->setPure(Record.readInt());
863  FD->setHasInheritedPrototype(Record.readInt());
864  FD->setHasWrittenPrototype(Record.readInt());
865  FD->setDeletedAsWritten(Record.readInt());
866  FD->setTrivial(Record.readInt());
867  FD->setTrivialForCall(Record.readInt());
868  FD->setDefaulted(Record.readInt());
869  FD->setExplicitlyDefaulted(Record.readInt());
870  FD->setHasImplicitReturnZero(Record.readInt());
871  FD->setConstexpr(Record.readInt());
872  FD->setUsesSEHTry(Record.readInt());
873  FD->setHasSkippedBody(Record.readInt());
874  FD->setIsMultiVersion(Record.readInt());
875  FD->setLateTemplateParsed(Record.readInt());
876 
877  FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
878  FD->EndRangeLoc = ReadSourceLocation();
879 
880  FD->ODRHash = Record.readInt();
881  FD->setHasODRHash(true);
882 
883  switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
885  mergeRedeclarable(FD, Redecl);
886  break;
888  // Merged when we merge the template.
889  FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
890  break;
892  auto *InstFD = ReadDeclAs<FunctionDecl>();
893  auto TSK = (TemplateSpecializationKind)Record.readInt();
894  SourceLocation POI = ReadSourceLocation();
895  FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
897  mergeRedeclarable(FD, Redecl);
898  break;
899  }
901  auto *Template = ReadDeclAs<FunctionTemplateDecl>();
902  auto TSK = (TemplateSpecializationKind)Record.readInt();
903 
904  // Template arguments.
906  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
907 
908  // Template args as written.
910  SourceLocation LAngleLoc, RAngleLoc;
911  bool HasTemplateArgumentsAsWritten = Record.readInt();
912  if (HasTemplateArgumentsAsWritten) {
913  unsigned NumTemplateArgLocs = Record.readInt();
914  TemplArgLocs.reserve(NumTemplateArgLocs);
915  for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
916  TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
917 
918  LAngleLoc = ReadSourceLocation();
919  RAngleLoc = ReadSourceLocation();
920  }
921 
922  SourceLocation POI = ReadSourceLocation();
923 
924  ASTContext &C = Reader.getContext();
925  TemplateArgumentList *TemplArgList
926  = TemplateArgumentList::CreateCopy(C, TemplArgs);
927  TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
928  for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
929  TemplArgsInfo.addArgument(TemplArgLocs[i]);
931  = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
932  TemplArgList,
933  HasTemplateArgumentsAsWritten ? &TemplArgsInfo
934  : nullptr,
935  POI);
936  FD->TemplateOrSpecialization = FTInfo;
937 
938  if (FD->isCanonicalDecl()) { // if canonical add to template's set.
939  // The template that contains the specializations set. It's not safe to
940  // use getCanonicalDecl on Template since it may still be initializing.
941  auto *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
942  // Get the InsertPos by FindNodeOrInsertPos() instead of calling
943  // InsertNode(FTInfo) directly to avoid the getASTContext() call in
944  // FunctionTemplateSpecializationInfo's Profile().
945  // We avoid getASTContext because a decl in the parent hierarchy may
946  // be initializing.
947  llvm::FoldingSetNodeID ID;
949  void *InsertPos = nullptr;
950  FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
951  FunctionTemplateSpecializationInfo *ExistingInfo =
952  CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
953  if (InsertPos)
954  CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
955  else {
956  assert(Reader.getContext().getLangOpts().Modules &&
957  "already deserialized this template specialization");
958  mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
959  }
960  }
961  break;
962  }
964  // Templates.
965  UnresolvedSet<8> TemplDecls;
966  unsigned NumTemplates = Record.readInt();
967  while (NumTemplates--)
968  TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
969 
970  // Templates args.
971  TemplateArgumentListInfo TemplArgs;
972  unsigned NumArgs = Record.readInt();
973  while (NumArgs--)
974  TemplArgs.addArgument(Record.readTemplateArgumentLoc());
975  TemplArgs.setLAngleLoc(ReadSourceLocation());
976  TemplArgs.setRAngleLoc(ReadSourceLocation());
977 
978  FD->setDependentTemplateSpecialization(Reader.getContext(),
979  TemplDecls, TemplArgs);
980  // These are not merged; we don't need to merge redeclarations of dependent
981  // template friends.
982  break;
983  }
984  }
985 
986  // Read in the parameters.
987  unsigned NumParams = Record.readInt();
989  Params.reserve(NumParams);
990  for (unsigned I = 0; I != NumParams; ++I)
991  Params.push_back(ReadDeclAs<ParmVarDecl>());
992  FD->setParams(Reader.getContext(), Params);
993 }
994 
996  VisitNamedDecl(MD);
997  if (Record.readInt()) {
998  // Load the body on-demand. Most clients won't care, because method
999  // definitions rarely show up in headers.
1000  Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1001  HasPendingBody = true;
1002  MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
1003  MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
1004  }
1005  MD->setInstanceMethod(Record.readInt());
1006  MD->setVariadic(Record.readInt());
1007  MD->setPropertyAccessor(Record.readInt());
1008  MD->setDefined(Record.readInt());
1009  MD->setOverriding(Record.readInt());
1010  MD->setHasSkippedBody(Record.readInt());
1011 
1012  MD->setIsRedeclaration(Record.readInt());
1013  MD->setHasRedeclaration(Record.readInt());
1014  if (MD->hasRedeclaration())
1015  Reader.getContext().setObjCMethodRedeclaration(MD,
1016  ReadDeclAs<ObjCMethodDecl>());
1017 
1019  MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1020  MD->setRelatedResultType(Record.readInt());
1021  MD->setReturnType(Record.readType());
1022  MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
1023  MD->DeclEndLoc = ReadSourceLocation();
1024  unsigned NumParams = Record.readInt();
1026  Params.reserve(NumParams);
1027  for (unsigned I = 0; I != NumParams; ++I)
1028  Params.push_back(ReadDeclAs<ParmVarDecl>());
1029 
1030  MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1031  unsigned NumStoredSelLocs = Record.readInt();
1033  SelLocs.reserve(NumStoredSelLocs);
1034  for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1035  SelLocs.push_back(ReadSourceLocation());
1036 
1037  MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1038 }
1039 
1041  VisitTypedefNameDecl(D);
1042 
1043  D->Variance = Record.readInt();
1044  D->Index = Record.readInt();
1045  D->VarianceLoc = ReadSourceLocation();
1046  D->ColonLoc = ReadSourceLocation();
1047 }
1048 
1050  VisitNamedDecl(CD);
1051  CD->setAtStartLoc(ReadSourceLocation());
1052  CD->setAtEndRange(ReadSourceRange());
1053 }
1054 
1056  unsigned numParams = Record.readInt();
1057  if (numParams == 0)
1058  return nullptr;
1059 
1061  typeParams.reserve(numParams);
1062  for (unsigned i = 0; i != numParams; ++i) {
1063  auto *typeParam = ReadDeclAs<ObjCTypeParamDecl>();
1064  if (!typeParam)
1065  return nullptr;
1066 
1067  typeParams.push_back(typeParam);
1068  }
1069 
1070  SourceLocation lAngleLoc = ReadSourceLocation();
1071  SourceLocation rAngleLoc = ReadSourceLocation();
1072 
1073  return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1074  typeParams, rAngleLoc);
1075 }
1076 
1077 void ASTDeclReader::ReadObjCDefinitionData(
1078  struct ObjCInterfaceDecl::DefinitionData &Data) {
1079  // Read the superclass.
1080  Data.SuperClassTInfo = GetTypeSourceInfo();
1081 
1082  Data.EndLoc = ReadSourceLocation();
1083  Data.HasDesignatedInitializers = Record.readInt();
1084 
1085  // Read the directly referenced protocols and their SourceLocations.
1086  unsigned NumProtocols = Record.readInt();
1088  Protocols.reserve(NumProtocols);
1089  for (unsigned I = 0; I != NumProtocols; ++I)
1090  Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1092  ProtoLocs.reserve(NumProtocols);
1093  for (unsigned I = 0; I != NumProtocols; ++I)
1094  ProtoLocs.push_back(ReadSourceLocation());
1095  Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1096  Reader.getContext());
1097 
1098  // Read the transitive closure of protocols referenced by this class.
1099  NumProtocols = Record.readInt();
1100  Protocols.clear();
1101  Protocols.reserve(NumProtocols);
1102  for (unsigned I = 0; I != NumProtocols; ++I)
1103  Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1104  Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1105  Reader.getContext());
1106 }
1107 
1108 void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1109  struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1110  // FIXME: odr checking?
1111 }
1112 
1114  RedeclarableResult Redecl = VisitRedeclarable(ID);
1115  VisitObjCContainerDecl(ID);
1116  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1117  mergeRedeclarable(ID, Redecl);
1118 
1119  ID->TypeParamList = ReadObjCTypeParamList();
1120  if (Record.readInt()) {
1121  // Read the definition.
1122  ID->allocateDefinitionData();
1123 
1124  ReadObjCDefinitionData(ID->data());
1125  ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1126  if (Canon->Data.getPointer()) {
1127  // If we already have a definition, keep the definition invariant and
1128  // merge the data.
1129  MergeDefinitionData(Canon, std::move(ID->data()));
1130  ID->Data = Canon->Data;
1131  } else {
1132  // Set the definition data of the canonical declaration, so other
1133  // redeclarations will see it.
1134  ID->getCanonicalDecl()->Data = ID->Data;
1135 
1136  // We will rebuild this list lazily.
1137  ID->setIvarList(nullptr);
1138  }
1139 
1140  // Note that we have deserialized a definition.
1141  Reader.PendingDefinitions.insert(ID);
1142 
1143  // Note that we've loaded this Objective-C class.
1144  Reader.ObjCClassesLoaded.push_back(ID);
1145  } else {
1146  ID->Data = ID->getCanonicalDecl()->Data;
1147  }
1148 }
1149 
1151  VisitFieldDecl(IVD);
1152  IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1153  // This field will be built lazily.
1154  IVD->setNextIvar(nullptr);
1155  bool synth = Record.readInt();
1156  IVD->setSynthesize(synth);
1157 }
1158 
1159 void ASTDeclReader::ReadObjCDefinitionData(
1160  struct ObjCProtocolDecl::DefinitionData &Data) {
1161  unsigned NumProtoRefs = Record.readInt();
1163  ProtoRefs.reserve(NumProtoRefs);
1164  for (unsigned I = 0; I != NumProtoRefs; ++I)
1165  ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1167  ProtoLocs.reserve(NumProtoRefs);
1168  for (unsigned I = 0; I != NumProtoRefs; ++I)
1169  ProtoLocs.push_back(ReadSourceLocation());
1170  Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1171  ProtoLocs.data(), Reader.getContext());
1172 }
1173 
1174 void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1175  struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1176  // FIXME: odr checking?
1177 }
1178 
1180  RedeclarableResult Redecl = VisitRedeclarable(PD);
1181  VisitObjCContainerDecl(PD);
1182  mergeRedeclarable(PD, Redecl);
1183 
1184  if (Record.readInt()) {
1185  // Read the definition.
1186  PD->allocateDefinitionData();
1187 
1188  ReadObjCDefinitionData(PD->data());
1189 
1190  ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1191  if (Canon->Data.getPointer()) {
1192  // If we already have a definition, keep the definition invariant and
1193  // merge the data.
1194  MergeDefinitionData(Canon, std::move(PD->data()));
1195  PD->Data = Canon->Data;
1196  } else {
1197  // Set the definition data of the canonical declaration, so other
1198  // redeclarations will see it.
1199  PD->getCanonicalDecl()->Data = PD->Data;
1200  }
1201  // Note that we have deserialized a definition.
1202  Reader.PendingDefinitions.insert(PD);
1203  } else {
1204  PD->Data = PD->getCanonicalDecl()->Data;
1205  }
1206 }
1207 
1209  VisitFieldDecl(FD);
1210 }
1211 
1213  VisitObjCContainerDecl(CD);
1214  CD->setCategoryNameLoc(ReadSourceLocation());
1215  CD->setIvarLBraceLoc(ReadSourceLocation());
1216  CD->setIvarRBraceLoc(ReadSourceLocation());
1217 
1218  // Note that this category has been deserialized. We do this before
1219  // deserializing the interface declaration, so that it will consider this
1220  /// category.
1221  Reader.CategoriesDeserialized.insert(CD);
1222 
1223  CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1224  CD->TypeParamList = ReadObjCTypeParamList();
1225  unsigned NumProtoRefs = Record.readInt();
1227  ProtoRefs.reserve(NumProtoRefs);
1228  for (unsigned I = 0; I != NumProtoRefs; ++I)
1229  ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1231  ProtoLocs.reserve(NumProtoRefs);
1232  for (unsigned I = 0; I != NumProtoRefs; ++I)
1233  ProtoLocs.push_back(ReadSourceLocation());
1234  CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1235  Reader.getContext());
1236 
1237  // Protocols in the class extension belong to the class.
1238  if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1239  CD->ClassInterface->mergeClassExtensionProtocolList(
1240  (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1241  Reader.getContext());
1242 }
1243 
1245  VisitNamedDecl(CAD);
1246  CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1247 }
1248 
1250  VisitNamedDecl(D);
1251  D->setAtLoc(ReadSourceLocation());
1252  D->setLParenLoc(ReadSourceLocation());
1253  QualType T = Record.readType();
1254  TypeSourceInfo *TSI = GetTypeSourceInfo();
1255  D->setType(T, TSI);
1257  (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1259  (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1261  (ObjCPropertyDecl::PropertyControl)Record.readInt());
1262  DeclarationName GetterName = Record.readDeclarationName();
1263  SourceLocation GetterLoc = ReadSourceLocation();
1264  D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1265  DeclarationName SetterName = Record.readDeclarationName();
1266  SourceLocation SetterLoc = ReadSourceLocation();
1267  D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1268  D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1269  D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1270  D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1271 }
1272 
1274  VisitObjCContainerDecl(D);
1275  D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1276 }
1277 
1279  VisitObjCImplDecl(D);
1280  D->CategoryNameLoc = ReadSourceLocation();
1281 }
1282 
1284  VisitObjCImplDecl(D);
1285  D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1286  D->SuperLoc = ReadSourceLocation();
1287  D->setIvarLBraceLoc(ReadSourceLocation());
1288  D->setIvarRBraceLoc(ReadSourceLocation());
1289  D->setHasNonZeroConstructors(Record.readInt());
1290  D->setHasDestructors(Record.readInt());
1291  D->NumIvarInitializers = Record.readInt();
1292  if (D->NumIvarInitializers)
1293  D->IvarInitializers = ReadGlobalOffset();
1294 }
1295 
1297  VisitDecl(D);
1298  D->setAtLoc(ReadSourceLocation());
1299  D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1300  D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1301  D->IvarLoc = ReadSourceLocation();
1302  D->setGetterCXXConstructor(Record.readExpr());
1303  D->setSetterCXXAssignment(Record.readExpr());
1304 }
1305 
1307  VisitDeclaratorDecl(FD);
1308  FD->Mutable = Record.readInt();
1309 
1310  if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1311  FD->InitStorage.setInt(ISK);
1312  FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1313  ? Record.readType().getAsOpaquePtr()
1314  : Record.readExpr());
1315  }
1316 
1317  if (auto *BW = Record.readExpr())
1318  FD->setBitWidth(BW);
1319 
1320  if (!FD->getDeclName()) {
1321  if (auto *Tmpl = ReadDeclAs<FieldDecl>())
1322  Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1323  }
1324  mergeMergeable(FD);
1325 }
1326 
1328  VisitDeclaratorDecl(PD);
1329  PD->GetterId = Record.getIdentifierInfo();
1330  PD->SetterId = Record.getIdentifierInfo();
1331 }
1332 
1334  VisitValueDecl(FD);
1335 
1336  FD->ChainingSize = Record.readInt();
1337  assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1338  FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1339 
1340  for (unsigned I = 0; I != FD->ChainingSize; ++I)
1341  FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1342 
1343  mergeMergeable(FD);
1344 }
1345 
1346 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1347  RedeclarableResult Redecl = VisitRedeclarable(VD);
1348  VisitDeclaratorDecl(VD);
1349 
1350  VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1351  VD->VarDeclBits.TSCSpec = Record.readInt();
1352  VD->VarDeclBits.InitStyle = Record.readInt();
1353  VD->VarDeclBits.ARCPseudoStrong = Record.readInt();
1354  if (!isa<ParmVarDecl>(VD)) {
1355  VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1356  Record.readInt();
1357  VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1358  VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1359  VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1360  VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1361  VD->NonParmVarDeclBits.IsInline = Record.readInt();
1362  VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1363  VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1364  VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1365  VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1366  VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1367  VD->NonParmVarDeclBits.EscapingByref = Record.readInt();
1368  }
1369  auto VarLinkage = Linkage(Record.readInt());
1370  VD->setCachedLinkage(VarLinkage);
1371 
1372  // Reconstruct the one piece of the IdentifierNamespace that we need.
1373  if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1375  VD->setLocalExternDecl();
1376 
1377  if (uint64_t Val = Record.readInt()) {
1378  VD->setInit(Record.readExpr());
1379  if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1380  EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1381  Eval->CheckedICE = true;
1382  Eval->IsICE = Val == 3;
1383  }
1384  }
1385 
1386  if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1387  Expr *CopyExpr = Record.readExpr();
1388  if (CopyExpr)
1389  Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1390  }
1391 
1392  if (VD->getStorageDuration() == SD_Static && Record.readInt())
1393  Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1394 
1395  enum VarKind {
1396  VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1397  };
1398  switch ((VarKind)Record.readInt()) {
1399  case VarNotTemplate:
1400  // Only true variables (not parameters or implicit parameters) can be
1401  // merged; the other kinds are not really redeclarable at all.
1402  if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1403  !isa<VarTemplateSpecializationDecl>(VD))
1404  mergeRedeclarable(VD, Redecl);
1405  break;
1406  case VarTemplate:
1407  // Merged when we merge the template.
1408  VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1409  break;
1410  case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1411  auto *Tmpl = ReadDeclAs<VarDecl>();
1412  auto TSK = (TemplateSpecializationKind)Record.readInt();
1413  SourceLocation POI = ReadSourceLocation();
1414  Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1415  mergeRedeclarable(VD, Redecl);
1416  break;
1417  }
1418  }
1419 
1420  return Redecl;
1421 }
1422 
1424  VisitVarDecl(PD);
1425 }
1426 
1428  VisitVarDecl(PD);
1429  unsigned isObjCMethodParam = Record.readInt();
1430  unsigned scopeDepth = Record.readInt();
1431  unsigned scopeIndex = Record.readInt();
1432  unsigned declQualifier = Record.readInt();
1433  if (isObjCMethodParam) {
1434  assert(scopeDepth == 0);
1435  PD->setObjCMethodScopeInfo(scopeIndex);
1436  PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1437  } else {
1438  PD->setScopeInfo(scopeDepth, scopeIndex);
1439  }
1440  PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1441  PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1442  if (Record.readInt()) // hasUninstantiatedDefaultArg.
1443  PD->setUninstantiatedDefaultArg(Record.readExpr());
1444 
1445  // FIXME: If this is a redeclaration of a function from another module, handle
1446  // inheritance of default arguments.
1447 }
1448 
1450  VisitVarDecl(DD);
1451  auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1452  for (unsigned I = 0; I != DD->NumBindings; ++I)
1453  BDs[I] = ReadDeclAs<BindingDecl>();
1454 }
1455 
1457  VisitValueDecl(BD);
1458  BD->Binding = Record.readExpr();
1459 }
1460 
1462  VisitDecl(AD);
1463  AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1464  AD->setRParenLoc(ReadSourceLocation());
1465 }
1466 
1468  VisitDecl(BD);
1469  BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1470  BD->setSignatureAsWritten(GetTypeSourceInfo());
1471  unsigned NumParams = Record.readInt();
1473  Params.reserve(NumParams);
1474  for (unsigned I = 0; I != NumParams; ++I)
1475  Params.push_back(ReadDeclAs<ParmVarDecl>());
1476  BD->setParams(Params);
1477 
1478  BD->setIsVariadic(Record.readInt());
1479  BD->setBlockMissingReturnType(Record.readInt());
1480  BD->setIsConversionFromLambda(Record.readInt());
1481  BD->setDoesNotEscape(Record.readInt());
1482 
1483  bool capturesCXXThis = Record.readInt();
1484  unsigned numCaptures = Record.readInt();
1486  captures.reserve(numCaptures);
1487  for (unsigned i = 0; i != numCaptures; ++i) {
1488  auto *decl = ReadDeclAs<VarDecl>();
1489  unsigned flags = Record.readInt();
1490  bool byRef = (flags & 1);
1491  bool nested = (flags & 2);
1492  Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1493 
1494  captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1495  }
1496  BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1497 }
1498 
1500  VisitDecl(CD);
1501  unsigned ContextParamPos = Record.readInt();
1502  CD->setNothrow(Record.readInt() != 0);
1503  // Body is set by VisitCapturedStmt.
1504  for (unsigned I = 0; I < CD->NumParams; ++I) {
1505  if (I != ContextParamPos)
1506  CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1507  else
1508  CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1509  }
1510 }
1511 
1513  VisitDecl(D);
1514  D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1515  D->setExternLoc(ReadSourceLocation());
1516  D->setRBraceLoc(ReadSourceLocation());
1517 }
1518 
1520  VisitDecl(D);
1521  D->RBraceLoc = ReadSourceLocation();
1522 }
1523 
1525  VisitNamedDecl(D);
1526  D->setLocStart(ReadSourceLocation());
1527 }
1528 
1530  RedeclarableResult Redecl = VisitRedeclarable(D);
1531  VisitNamedDecl(D);
1532  D->setInline(Record.readInt());
1533  D->LocStart = ReadSourceLocation();
1534  D->RBraceLoc = ReadSourceLocation();
1535 
1536  // Defer loading the anonymous namespace until we've finished merging
1537  // this namespace; loading it might load a later declaration of the
1538  // same namespace, and we have an invariant that older declarations
1539  // get merged before newer ones try to merge.
1540  GlobalDeclID AnonNamespace = 0;
1541  if (Redecl.getFirstID() == ThisDeclID) {
1542  AnonNamespace = ReadDeclID();
1543  } else {
1544  // Link this namespace back to the first declaration, which has already
1545  // been deserialized.
1546  D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1547  }
1548 
1549  mergeRedeclarable(D, Redecl);
1550 
1551  if (AnonNamespace) {
1552  // Each module has its own anonymous namespace, which is disjoint from
1553  // any other module's anonymous namespaces, so don't attach the anonymous
1554  // namespace at all.
1555  auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1556  if (!Record.isModule())
1557  D->setAnonymousNamespace(Anon);
1558  }
1559 }
1560 
1562  RedeclarableResult Redecl = VisitRedeclarable(D);
1563  VisitNamedDecl(D);
1564  D->NamespaceLoc = ReadSourceLocation();
1565  D->IdentLoc = ReadSourceLocation();
1566  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1567  D->Namespace = ReadDeclAs<NamedDecl>();
1568  mergeRedeclarable(D, Redecl);
1569 }
1570 
1572  VisitNamedDecl(D);
1573  D->setUsingLoc(ReadSourceLocation());
1574  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1575  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1576  D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1577  D->setTypename(Record.readInt());
1578  if (auto *Pattern = ReadDeclAs<NamedDecl>())
1579  Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1580  mergeMergeable(D);
1581 }
1582 
1584  VisitNamedDecl(D);
1585  D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1586  auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1587  for (unsigned I = 0; I != D->NumExpansions; ++I)
1588  Expansions[I] = ReadDeclAs<NamedDecl>();
1589  mergeMergeable(D);
1590 }
1591 
1593  RedeclarableResult Redecl = VisitRedeclarable(D);
1594  VisitNamedDecl(D);
1595  D->Underlying = ReadDeclAs<NamedDecl>();
1596  D->IdentifierNamespace = Record.readInt();
1597  D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1598  auto *Pattern = ReadDeclAs<UsingShadowDecl>();
1599  if (Pattern)
1600  Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1601  mergeRedeclarable(D, Redecl);
1602 }
1603 
1606  VisitUsingShadowDecl(D);
1607  D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1608  D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1609  D->IsVirtual = Record.readInt();
1610 }
1611 
1613  VisitNamedDecl(D);
1614  D->UsingLoc = ReadSourceLocation();
1615  D->NamespaceLoc = ReadSourceLocation();
1616  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1617  D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1618  D->CommonAncestor = ReadDeclAs<DeclContext>();
1619 }
1620 
1622  VisitValueDecl(D);
1623  D->setUsingLoc(ReadSourceLocation());
1624  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1625  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1626  D->EllipsisLoc = ReadSourceLocation();
1627  mergeMergeable(D);
1628 }
1629 
1632  VisitTypeDecl(D);
1633  D->TypenameLocation = ReadSourceLocation();
1634  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1635  D->EllipsisLoc = ReadSourceLocation();
1636  mergeMergeable(D);
1637 }
1638 
1639 void ASTDeclReader::ReadCXXDefinitionData(
1640  struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1641  // Note: the caller has deserialized the IsLambda bit already.
1642  Data.UserDeclaredConstructor = Record.readInt();
1643  Data.UserDeclaredSpecialMembers = Record.readInt();
1644  Data.Aggregate = Record.readInt();
1645  Data.PlainOldData = Record.readInt();
1646  Data.Empty = Record.readInt();
1647  Data.Polymorphic = Record.readInt();
1648  Data.Abstract = Record.readInt();
1649  Data.IsStandardLayout = Record.readInt();
1650  Data.IsCXX11StandardLayout = Record.readInt();
1651  Data.HasBasesWithFields = Record.readInt();
1652  Data.HasBasesWithNonStaticDataMembers = Record.readInt();
1653  Data.HasPrivateFields = Record.readInt();
1654  Data.HasProtectedFields = Record.readInt();
1655  Data.HasPublicFields = Record.readInt();
1656  Data.HasMutableFields = Record.readInt();
1657  Data.HasVariantMembers = Record.readInt();
1658  Data.HasOnlyCMembers = Record.readInt();
1659  Data.HasInClassInitializer = Record.readInt();
1660  Data.HasUninitializedReferenceMember = Record.readInt();
1661  Data.HasUninitializedFields = Record.readInt();
1662  Data.HasInheritedConstructor = Record.readInt();
1663  Data.HasInheritedAssignment = Record.readInt();
1664  Data.NeedOverloadResolutionForCopyConstructor = Record.readInt();
1665  Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1666  Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1667  Data.NeedOverloadResolutionForDestructor = Record.readInt();
1668  Data.DefaultedCopyConstructorIsDeleted = Record.readInt();
1669  Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1670  Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1671  Data.DefaultedDestructorIsDeleted = Record.readInt();
1672  Data.HasTrivialSpecialMembers = Record.readInt();
1673  Data.HasTrivialSpecialMembersForCall = Record.readInt();
1674  Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1675  Data.DeclaredNonTrivialSpecialMembersForCall = Record.readInt();
1676  Data.HasIrrelevantDestructor = Record.readInt();
1677  Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1678  Data.HasDefaultedDefaultConstructor = Record.readInt();
1679  Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1680  Data.HasConstexprDefaultConstructor = Record.readInt();
1681  Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1682  Data.ComputedVisibleConversions = Record.readInt();
1683  Data.UserProvidedDefaultConstructor = Record.readInt();
1684  Data.DeclaredSpecialMembers = Record.readInt();
1685  Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1686  Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1687  Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1688  Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1689  Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1690  Data.ODRHash = Record.readInt();
1691  Data.HasODRHash = true;
1692 
1693  if (Record.readInt())
1694  Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1695 
1696  Data.NumBases = Record.readInt();
1697  if (Data.NumBases)
1698  Data.Bases = ReadGlobalOffset();
1699  Data.NumVBases = Record.readInt();
1700  if (Data.NumVBases)
1701  Data.VBases = ReadGlobalOffset();
1702 
1703  Record.readUnresolvedSet(Data.Conversions);
1704  Record.readUnresolvedSet(Data.VisibleConversions);
1705  assert(Data.Definition && "Data.Definition should be already set!");
1706  Data.FirstFriend = ReadDeclID();
1707 
1708  if (Data.IsLambda) {
1709  using Capture = LambdaCapture;
1710 
1711  auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1712  Lambda.Dependent = Record.readInt();
1713  Lambda.IsGenericLambda = Record.readInt();
1714  Lambda.CaptureDefault = Record.readInt();
1715  Lambda.NumCaptures = Record.readInt();
1716  Lambda.NumExplicitCaptures = Record.readInt();
1717  Lambda.ManglingNumber = Record.readInt();
1718  Lambda.ContextDecl = ReadDeclID();
1719  Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1720  sizeof(Capture) * Lambda.NumCaptures);
1721  Capture *ToCapture = Lambda.Captures;
1722  Lambda.MethodTyInfo = GetTypeSourceInfo();
1723  for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1724  SourceLocation Loc = ReadSourceLocation();
1725  bool IsImplicit = Record.readInt();
1726  auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1727  switch (Kind) {
1728  case LCK_StarThis:
1729  case LCK_This:
1730  case LCK_VLAType:
1731  *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1732  break;
1733  case LCK_ByCopy:
1734  case LCK_ByRef:
1735  auto *Var = ReadDeclAs<VarDecl>();
1736  SourceLocation EllipsisLoc = ReadSourceLocation();
1737  *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1738  break;
1739  }
1740  }
1741  }
1742 }
1743 
1744 void ASTDeclReader::MergeDefinitionData(
1745  CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1746  assert(D->DefinitionData &&
1747  "merging class definition into non-definition");
1748  auto &DD = *D->DefinitionData;
1749 
1750  if (DD.Definition != MergeDD.Definition) {
1751  // Track that we merged the definitions.
1752  Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1753  DD.Definition));
1754  Reader.PendingDefinitions.erase(MergeDD.Definition);
1755  MergeDD.Definition->setCompleteDefinition(false);
1756  Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1757  assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1758  "already loaded pending lookups for merged definition");
1759  }
1760 
1761  auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1762  if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1763  PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1764  // We faked up this definition data because we found a class for which we'd
1765  // not yet loaded the definition. Replace it with the real thing now.
1766  assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1767  PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1768 
1769  // Don't change which declaration is the definition; that is required
1770  // to be invariant once we select it.
1771  auto *Def = DD.Definition;
1772  DD = std::move(MergeDD);
1773  DD.Definition = Def;
1774  return;
1775  }
1776 
1777  // FIXME: Move this out into a .def file?
1778  bool DetectedOdrViolation = false;
1779 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1780 #define MATCH_FIELD(Field) \
1781  DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1782  OR_FIELD(Field)
1783  MATCH_FIELD(UserDeclaredConstructor)
1784  MATCH_FIELD(UserDeclaredSpecialMembers)
1785  MATCH_FIELD(Aggregate)
1786  MATCH_FIELD(PlainOldData)
1787  MATCH_FIELD(Empty)
1788  MATCH_FIELD(Polymorphic)
1789  MATCH_FIELD(Abstract)
1790  MATCH_FIELD(IsStandardLayout)
1791  MATCH_FIELD(IsCXX11StandardLayout)
1792  MATCH_FIELD(HasBasesWithFields)
1793  MATCH_FIELD(HasBasesWithNonStaticDataMembers)
1794  MATCH_FIELD(HasPrivateFields)
1795  MATCH_FIELD(HasProtectedFields)
1796  MATCH_FIELD(HasPublicFields)
1797  MATCH_FIELD(HasMutableFields)
1798  MATCH_FIELD(HasVariantMembers)
1799  MATCH_FIELD(HasOnlyCMembers)
1800  MATCH_FIELD(HasInClassInitializer)
1801  MATCH_FIELD(HasUninitializedReferenceMember)
1802  MATCH_FIELD(HasUninitializedFields)
1803  MATCH_FIELD(HasInheritedConstructor)
1804  MATCH_FIELD(HasInheritedAssignment)
1805  MATCH_FIELD(NeedOverloadResolutionForCopyConstructor)
1806  MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1807  MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1808  MATCH_FIELD(NeedOverloadResolutionForDestructor)
1809  MATCH_FIELD(DefaultedCopyConstructorIsDeleted)
1810  MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1811  MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1812  MATCH_FIELD(DefaultedDestructorIsDeleted)
1813  OR_FIELD(HasTrivialSpecialMembers)
1814  OR_FIELD(HasTrivialSpecialMembersForCall)
1815  OR_FIELD(DeclaredNonTrivialSpecialMembers)
1816  OR_FIELD(DeclaredNonTrivialSpecialMembersForCall)
1817  MATCH_FIELD(HasIrrelevantDestructor)
1818  OR_FIELD(HasConstexprNonCopyMoveConstructor)
1819  OR_FIELD(HasDefaultedDefaultConstructor)
1820  MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1821  OR_FIELD(HasConstexprDefaultConstructor)
1822  MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1823  // ComputedVisibleConversions is handled below.
1824  MATCH_FIELD(UserProvidedDefaultConstructor)
1825  OR_FIELD(DeclaredSpecialMembers)
1826  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1827  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1828  MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1829  OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1830  OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1831  MATCH_FIELD(IsLambda)
1832 #undef OR_FIELD
1833 #undef MATCH_FIELD
1834 
1835  if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1836  DetectedOdrViolation = true;
1837  // FIXME: Issue a diagnostic if the base classes don't match when we come
1838  // to lazily load them.
1839 
1840  // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1841  // match when we come to lazily load them.
1842  if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1843  DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1844  DD.ComputedVisibleConversions = true;
1845  }
1846 
1847  // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1848  // lazily load it.
1849 
1850  if (DD.IsLambda) {
1851  // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1852  // when they occur within the body of a function template specialization).
1853  }
1854 
1855  if (D->getODRHash() != MergeDD.ODRHash) {
1856  DetectedOdrViolation = true;
1857  }
1858 
1859  if (DetectedOdrViolation)
1860  Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1861  {MergeDD.Definition, &MergeDD});
1862 }
1863 
1864 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1865  struct CXXRecordDecl::DefinitionData *DD;
1866  ASTContext &C = Reader.getContext();
1867 
1868  // Determine whether this is a lambda closure type, so that we can
1869  // allocate the appropriate DefinitionData structure.
1870  bool IsLambda = Record.readInt();
1871  if (IsLambda)
1872  DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1873  LCD_None);
1874  else
1875  DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1876 
1877  CXXRecordDecl *Canon = D->getCanonicalDecl();
1878  // Set decl definition data before reading it, so that during deserialization
1879  // when we read CXXRecordDecl, it already has definition data and we don't
1880  // set fake one.
1881  if (!Canon->DefinitionData)
1882  Canon->DefinitionData = DD;
1883  D->DefinitionData = Canon->DefinitionData;
1884  ReadCXXDefinitionData(*DD, D);
1885 
1886  // We might already have a different definition for this record. This can
1887  // happen either because we're reading an update record, or because we've
1888  // already done some merging. Either way, just merge into it.
1889  if (Canon->DefinitionData != DD) {
1890  MergeDefinitionData(Canon, std::move(*DD));
1891  return;
1892  }
1893 
1894  // Mark this declaration as being a definition.
1895  D->setCompleteDefinition(true);
1896 
1897  // If this is not the first declaration or is an update record, we can have
1898  // other redeclarations already. Make a note that we need to propagate the
1899  // DefinitionData pointer onto them.
1900  if (Update || Canon != D)
1901  Reader.PendingDefinitions.insert(D);
1902 }
1903 
1904 ASTDeclReader::RedeclarableResult
1906  RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1907 
1908  ASTContext &C = Reader.getContext();
1909 
1910  enum CXXRecKind {
1911  CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1912  };
1913  switch ((CXXRecKind)Record.readInt()) {
1914  case CXXRecNotTemplate:
1915  // Merged when we merge the folding set entry in the primary template.
1916  if (!isa<ClassTemplateSpecializationDecl>(D))
1917  mergeRedeclarable(D, Redecl);
1918  break;
1919  case CXXRecTemplate: {
1920  // Merged when we merge the template.
1921  auto *Template = ReadDeclAs<ClassTemplateDecl>();
1922  D->TemplateOrInstantiation = Template;
1923  if (!Template->getTemplatedDecl()) {
1924  // We've not actually loaded the ClassTemplateDecl yet, because we're
1925  // currently being loaded as its pattern. Rely on it to set up our
1926  // TypeForDecl (see VisitClassTemplateDecl).
1927  //
1928  // Beware: we do not yet know our canonical declaration, and may still
1929  // get merged once the surrounding class template has got off the ground.
1930  DeferredTypeID = 0;
1931  }
1932  break;
1933  }
1934  case CXXRecMemberSpecialization: {
1935  auto *RD = ReadDeclAs<CXXRecordDecl>();
1936  auto TSK = (TemplateSpecializationKind)Record.readInt();
1937  SourceLocation POI = ReadSourceLocation();
1938  MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1939  MSI->setPointOfInstantiation(POI);
1940  D->TemplateOrInstantiation = MSI;
1941  mergeRedeclarable(D, Redecl);
1942  break;
1943  }
1944  }
1945 
1946  bool WasDefinition = Record.readInt();
1947  if (WasDefinition)
1948  ReadCXXRecordDefinition(D, /*Update*/false);
1949  else
1950  // Propagate DefinitionData pointer from the canonical declaration.
1951  D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1952 
1953  // Lazily load the key function to avoid deserializing every method so we can
1954  // compute it.
1955  if (WasDefinition) {
1956  DeclID KeyFn = ReadDeclID();
1957  if (KeyFn && D->isCompleteDefinition())
1958  // FIXME: This is wrong for the ARM ABI, where some other module may have
1959  // made this function no longer be a key function. We need an update
1960  // record or similar for that case.
1961  C.KeyFunctions[D] = KeyFn;
1962  }
1963 
1964  return Redecl;
1965 }
1966 
1968  VisitFunctionDecl(D);
1969  D->setIsCopyDeductionCandidate(Record.readInt());
1970 }
1971 
1973  VisitFunctionDecl(D);
1974 
1975  unsigned NumOverridenMethods = Record.readInt();
1976  if (D->isCanonicalDecl()) {
1977  while (NumOverridenMethods--) {
1978  // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1979  // MD may be initializing.
1980  if (auto *MD = ReadDeclAs<CXXMethodDecl>())
1981  Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1982  }
1983  } else {
1984  // We don't care about which declarations this used to override; we get
1985  // the relevant information from the canonical declaration.
1986  Record.skipInts(NumOverridenMethods);
1987  }
1988 }
1989 
1991  // We need the inherited constructor information to merge the declaration,
1992  // so we have to read it before we call VisitCXXMethodDecl.
1993  if (D->isInheritingConstructor()) {
1994  auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1995  auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1996  *D->getTrailingObjects<InheritedConstructor>() =
1997  InheritedConstructor(Shadow, Ctor);
1998  }
1999 
2000  VisitCXXMethodDecl(D);
2001 }
2002 
2004  VisitCXXMethodDecl(D);
2005 
2006  if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
2007  CXXDestructorDecl *Canon = D->getCanonicalDecl();
2008  auto *ThisArg = Record.readExpr();
2009  // FIXME: Check consistency if we have an old and new operator delete.
2010  if (!Canon->OperatorDelete) {
2011  Canon->OperatorDelete = OperatorDelete;
2012  Canon->OperatorDeleteThisArg = ThisArg;
2013  }
2014  }
2015 }
2016 
2018  VisitCXXMethodDecl(D);
2019 }
2020 
2022  VisitDecl(D);
2023  D->ImportedAndComplete.setPointer(readModule());
2024  D->ImportedAndComplete.setInt(Record.readInt());
2025  auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
2026  for (unsigned I = 0, N = Record.back(); I != N; ++I)
2027  StoredLocs[I] = ReadSourceLocation();
2028  Record.skipInts(1); // The number of stored source locations.
2029 }
2030 
2032  VisitDecl(D);
2033  D->setColonLoc(ReadSourceLocation());
2034 }
2035 
2037  VisitDecl(D);
2038  if (Record.readInt()) // hasFriendDecl
2039  D->Friend = ReadDeclAs<NamedDecl>();
2040  else
2041  D->Friend = GetTypeSourceInfo();
2042  for (unsigned i = 0; i != D->NumTPLists; ++i)
2043  D->getTrailingObjects<TemplateParameterList *>()[i] =
2044  Record.readTemplateParameterList();
2045  D->NextFriend = ReadDeclID();
2046  D->UnsupportedFriend = (Record.readInt() != 0);
2047  D->FriendLoc = ReadSourceLocation();
2048 }
2049 
2051  VisitDecl(D);
2052  unsigned NumParams = Record.readInt();
2053  D->NumParams = NumParams;
2054  D->Params = new TemplateParameterList*[NumParams];
2055  for (unsigned i = 0; i != NumParams; ++i)
2056  D->Params[i] = Record.readTemplateParameterList();
2057  if (Record.readInt()) // HasFriendDecl
2058  D->Friend = ReadDeclAs<NamedDecl>();
2059  else
2060  D->Friend = GetTypeSourceInfo();
2061  D->FriendLoc = ReadSourceLocation();
2062 }
2063 
2065  VisitNamedDecl(D);
2066 
2067  DeclID PatternID = ReadDeclID();
2068  auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2069  TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2070  // FIXME handle associated constraints
2071  D->init(TemplatedDecl, TemplateParams);
2072 
2073  return PatternID;
2074 }
2075 
2076 ASTDeclReader::RedeclarableResult
2078  RedeclarableResult Redecl = VisitRedeclarable(D);
2079 
2080  // Make sure we've allocated the Common pointer first. We do this before
2081  // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2083  if (!CanonD->Common) {
2084  CanonD->Common = CanonD->newCommon(Reader.getContext());
2085  Reader.PendingDefinitions.insert(CanonD);
2086  }
2087  D->Common = CanonD->Common;
2088 
2089  // If this is the first declaration of the template, fill in the information
2090  // for the 'common' pointer.
2091  if (ThisDeclID == Redecl.getFirstID()) {
2092  if (auto *RTD = ReadDeclAs<RedeclarableTemplateDecl>()) {
2093  assert(RTD->getKind() == D->getKind() &&
2094  "InstantiatedFromMemberTemplate kind mismatch");
2096  if (Record.readInt())
2098  }
2099  }
2100 
2101  DeclID PatternID = VisitTemplateDecl(D);
2102  D->IdentifierNamespace = Record.readInt();
2103 
2104  mergeRedeclarable(D, Redecl, PatternID);
2105 
2106  // If we merged the template with a prior declaration chain, merge the common
2107  // pointer.
2108  // FIXME: Actually merge here, don't just overwrite.
2109  D->Common = D->getCanonicalDecl()->Common;
2110 
2111  return Redecl;
2112 }
2113 
2115  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2116 
2117  if (ThisDeclID == Redecl.getFirstID()) {
2118  // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2119  // the specializations.
2121  ReadDeclIDList(SpecIDs);
2123  }
2124 
2125  if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2126  // We were loaded before our templated declaration was. We've not set up
2127  // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2128  // it now.
2129  Reader.getContext().getInjectedClassNameType(
2131  }
2132 }
2133 
2135  llvm_unreachable("BuiltinTemplates are not serialized");
2136 }
2137 
2138 /// TODO: Unify with ClassTemplateDecl version?
2139 /// May require unifying ClassTemplateDecl and
2140 /// VarTemplateDecl beyond TemplateDecl...
2142  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2143 
2144  if (ThisDeclID == Redecl.getFirstID()) {
2145  // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2146  // the specializations.
2148  ReadDeclIDList(SpecIDs);
2150  }
2151 }
2152 
2153 ASTDeclReader::RedeclarableResult
2156  RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2157 
2158  ASTContext &C = Reader.getContext();
2159  if (Decl *InstD = ReadDecl()) {
2160  if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2161  D->SpecializedTemplate = CTD;
2162  } else {
2164  Record.readTemplateArgumentList(TemplArgs);
2165  TemplateArgumentList *ArgList
2166  = TemplateArgumentList::CreateCopy(C, TemplArgs);
2167  auto *PS =
2169  SpecializedPartialSpecialization();
2170  PS->PartialSpecialization
2171  = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2172  PS->TemplateArgs = ArgList;
2173  D->SpecializedTemplate = PS;
2174  }
2175  }
2176 
2178  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2179  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2180  D->PointOfInstantiation = ReadSourceLocation();
2181  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2182 
2183  bool writtenAsCanonicalDecl = Record.readInt();
2184  if (writtenAsCanonicalDecl) {
2185  auto *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2186  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2187  // Set this as, or find, the canonical declaration for this specialization
2189  if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2190  CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2191  .GetOrInsertNode(Partial);
2192  } else {
2193  CanonSpec =
2194  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2195  }
2196  // If there was already a canonical specialization, merge into it.
2197  if (CanonSpec != D) {
2198  mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2199 
2200  // This declaration might be a definition. Merge with any existing
2201  // definition.
2202  if (auto *DDD = D->DefinitionData) {
2203  if (CanonSpec->DefinitionData)
2204  MergeDefinitionData(CanonSpec, std::move(*DDD));
2205  else
2206  CanonSpec->DefinitionData = D->DefinitionData;
2207  }
2208  D->DefinitionData = CanonSpec->DefinitionData;
2209  }
2210  }
2211  }
2212 
2213  // Explicit info.
2214  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2215  auto *ExplicitInfo =
2216  new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2217  ExplicitInfo->TypeAsWritten = TyInfo;
2218  ExplicitInfo->ExternLoc = ReadSourceLocation();
2219  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2220  D->ExplicitInfo = ExplicitInfo;
2221  }
2222 
2223  return Redecl;
2224 }
2225 
2228  RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2229 
2230  D->TemplateParams = Record.readTemplateParameterList();
2231  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2232 
2233  // These are read/set from/to the first declaration.
2234  if (ThisDeclID == Redecl.getFirstID()) {
2235  D->InstantiatedFromMember.setPointer(
2236  ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2237  D->InstantiatedFromMember.setInt(Record.readInt());
2238  }
2239 }
2240 
2243  VisitDecl(D);
2244  D->Specialization = ReadDeclAs<CXXMethodDecl>();
2245 }
2246 
2248  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2249 
2250  if (ThisDeclID == Redecl.getFirstID()) {
2251  // This FunctionTemplateDecl owns a CommonPtr; read it.
2253  ReadDeclIDList(SpecIDs);
2255  }
2256 }
2257 
2258 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2259 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2260 /// VarTemplate(Partial)SpecializationDecl with a new data
2261 /// structure Template(Partial)SpecializationDecl, and
2262 /// using Template(Partial)SpecializationDecl as input type.
2263 ASTDeclReader::RedeclarableResult
2266  RedeclarableResult Redecl = VisitVarDeclImpl(D);
2267 
2268  ASTContext &C = Reader.getContext();
2269  if (Decl *InstD = ReadDecl()) {
2270  if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2271  D->SpecializedTemplate = VTD;
2272  } else {
2274  Record.readTemplateArgumentList(TemplArgs);
2276  C, TemplArgs);
2277  auto *PS =
2278  new (C)
2279  VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2280  PS->PartialSpecialization =
2281  cast<VarTemplatePartialSpecializationDecl>(InstD);
2282  PS->TemplateArgs = ArgList;
2283  D->SpecializedTemplate = PS;
2284  }
2285  }
2286 
2287  // Explicit info.
2288  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2289  auto *ExplicitInfo =
2290  new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2291  ExplicitInfo->TypeAsWritten = TyInfo;
2292  ExplicitInfo->ExternLoc = ReadSourceLocation();
2293  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2294  D->ExplicitInfo = ExplicitInfo;
2295  }
2296 
2298  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2299  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2300  D->PointOfInstantiation = ReadSourceLocation();
2301  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2302  D->IsCompleteDefinition = Record.readInt();
2303 
2304  bool writtenAsCanonicalDecl = Record.readInt();
2305  if (writtenAsCanonicalDecl) {
2306  auto *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2307  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2308  // FIXME: If it's already present, merge it.
2309  if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2310  CanonPattern->getCommonPtr()->PartialSpecializations
2311  .GetOrInsertNode(Partial);
2312  } else {
2313  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2314  }
2315  }
2316  }
2317 
2318  return Redecl;
2319 }
2320 
2321 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2322 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2323 /// VarTemplate(Partial)SpecializationDecl with a new data
2324 /// structure Template(Partial)SpecializationDecl, and
2325 /// using Template(Partial)SpecializationDecl as input type.
2328  RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2329 
2330  D->TemplateParams = Record.readTemplateParameterList();
2331  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2332 
2333  // These are read/set from/to the first declaration.
2334  if (ThisDeclID == Redecl.getFirstID()) {
2335  D->InstantiatedFromMember.setPointer(
2336  ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2337  D->InstantiatedFromMember.setInt(Record.readInt());
2338  }
2339 }
2340 
2342  VisitTypeDecl(D);
2343 
2344  D->setDeclaredWithTypename(Record.readInt());
2345 
2346  if (Record.readInt())
2347  D->setDefaultArgument(GetTypeSourceInfo());
2348 }
2349 
2351  VisitDeclaratorDecl(D);
2352  // TemplateParmPosition.
2353  D->setDepth(Record.readInt());
2354  D->setPosition(Record.readInt());
2355  if (D->isExpandedParameterPack()) {
2356  auto TypesAndInfos =
2357  D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2358  for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2359  new (&TypesAndInfos[I].first) QualType(Record.readType());
2360  TypesAndInfos[I].second = GetTypeSourceInfo();
2361  }
2362  } else {
2363  // Rest of NonTypeTemplateParmDecl.
2364  D->ParameterPack = Record.readInt();
2365  if (Record.readInt())
2366  D->setDefaultArgument(Record.readExpr());
2367  }
2368 }
2369 
2371  VisitTemplateDecl(D);
2372  // TemplateParmPosition.
2373  D->setDepth(Record.readInt());
2374  D->setPosition(Record.readInt());
2375  if (D->isExpandedParameterPack()) {
2376  auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2377  for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2378  I != N; ++I)
2379  Data[I] = Record.readTemplateParameterList();
2380  } else {
2381  // Rest of TemplateTemplateParmDecl.
2382  D->ParameterPack = Record.readInt();
2383  if (Record.readInt())
2384  D->setDefaultArgument(Reader.getContext(),
2385  Record.readTemplateArgumentLoc());
2386  }
2387 }
2388 
2390  VisitRedeclarableTemplateDecl(D);
2391 }
2392 
2394  VisitDecl(D);
2395  D->AssertExprAndFailed.setPointer(Record.readExpr());
2396  D->AssertExprAndFailed.setInt(Record.readInt());
2397  D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2398  D->RParenLoc = ReadSourceLocation();
2399 }
2400 
2402  VisitDecl(D);
2403 }
2404 
2405 std::pair<uint64_t, uint64_t>
2407  uint64_t LexicalOffset = ReadLocalOffset();
2408  uint64_t VisibleOffset = ReadLocalOffset();
2409  return std::make_pair(LexicalOffset, VisibleOffset);
2410 }
2411 
2412 template <typename T>
2413 ASTDeclReader::RedeclarableResult
2415  DeclID FirstDeclID = ReadDeclID();
2416  Decl *MergeWith = nullptr;
2417 
2418  bool IsKeyDecl = ThisDeclID == FirstDeclID;
2419  bool IsFirstLocalDecl = false;
2420 
2421  uint64_t RedeclOffset = 0;
2422 
2423  // 0 indicates that this declaration was the only declaration of its entity,
2424  // and is used for space optimization.
2425  if (FirstDeclID == 0) {
2426  FirstDeclID = ThisDeclID;
2427  IsKeyDecl = true;
2428  IsFirstLocalDecl = true;
2429  } else if (unsigned N = Record.readInt()) {
2430  // This declaration was the first local declaration, but may have imported
2431  // other declarations.
2432  IsKeyDecl = N == 1;
2433  IsFirstLocalDecl = true;
2434 
2435  // We have some declarations that must be before us in our redeclaration
2436  // chain. Read them now, and remember that we ought to merge with one of
2437  // them.
2438  // FIXME: Provide a known merge target to the second and subsequent such
2439  // declaration.
2440  for (unsigned I = 0; I != N - 1; ++I)
2441  MergeWith = ReadDecl();
2442 
2443  RedeclOffset = ReadLocalOffset();
2444  } else {
2445  // This declaration was not the first local declaration. Read the first
2446  // local declaration now, to trigger the import of other redeclarations.
2447  (void)ReadDecl();
2448  }
2449 
2450  auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2451  if (FirstDecl != D) {
2452  // We delay loading of the redeclaration chain to avoid deeply nested calls.
2453  // We temporarily set the first (canonical) declaration as the previous one
2454  // which is the one that matters and mark the real previous DeclID to be
2455  // loaded & attached later on.
2457  D->First = FirstDecl->getCanonicalDecl();
2458  }
2459 
2460  auto *DAsT = static_cast<T *>(D);
2461 
2462  // Note that we need to load local redeclarations of this decl and build a
2463  // decl chain for them. This must happen *after* we perform the preloading
2464  // above; this ensures that the redeclaration chain is built in the correct
2465  // order.
2466  if (IsFirstLocalDecl)
2467  Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2468 
2469  return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2470 }
2471 
2472 /// Attempts to merge the given declaration (D) with another declaration
2473 /// of the same entity.
2474 template<typename T>
2476  RedeclarableResult &Redecl,
2477  DeclID TemplatePatternID) {
2478  // If modules are not available, there is no reason to perform this merge.
2479  if (!Reader.getContext().getLangOpts().Modules)
2480  return;
2481 
2482  // If we're not the canonical declaration, we don't need to merge.
2483  if (!DBase->isFirstDecl())
2484  return;
2485 
2486  auto *D = static_cast<T *>(DBase);
2487 
2488  if (auto *Existing = Redecl.getKnownMergeTarget())
2489  // We already know of an existing declaration we should merge with.
2490  mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2491  else if (FindExistingResult ExistingRes = findExisting(D))
2492  if (T *Existing = ExistingRes)
2493  mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2494 }
2495 
2496 /// "Cast" to type T, asserting if we don't have an implicit conversion.
2497 /// We use this to put code in a template that will only be valid for certain
2498 /// instantiations.
2499 template<typename T> static T assert_cast(T t) { return t; }
2500 template<typename T> static T assert_cast(...) {
2501  llvm_unreachable("bad assert_cast");
2502 }
2503 
2504 /// Merge together the pattern declarations from two template
2505 /// declarations.
2507  RedeclarableTemplateDecl *Existing,
2508  DeclID DsID, bool IsKeyDecl) {
2509  auto *DPattern = D->getTemplatedDecl();
2510  auto *ExistingPattern = Existing->getTemplatedDecl();
2511  RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2512  DPattern->getCanonicalDecl()->getGlobalID(),
2513  IsKeyDecl);
2514 
2515  if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2516  // Merge with any existing definition.
2517  // FIXME: This is duplicated in several places. Refactor.
2518  auto *ExistingClass =
2519  cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2520  if (auto *DDD = DClass->DefinitionData) {
2521  if (ExistingClass->DefinitionData) {
2522  MergeDefinitionData(ExistingClass, std::move(*DDD));
2523  } else {
2524  ExistingClass->DefinitionData = DClass->DefinitionData;
2525  // We may have skipped this before because we thought that DClass
2526  // was the canonical declaration.
2527  Reader.PendingDefinitions.insert(DClass);
2528  }
2529  }
2530  DClass->DefinitionData = ExistingClass->DefinitionData;
2531 
2532  return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2533  Result);
2534  }
2535  if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2536  return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2537  Result);
2538  if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2539  return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2540  if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2541  return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2542  Result);
2543  llvm_unreachable("merged an unknown kind of redeclarable template");
2544 }
2545 
2546 /// Attempts to merge the given declaration (D) with another declaration
2547 /// of the same entity.
2548 template<typename T>
2550  RedeclarableResult &Redecl,
2551  DeclID TemplatePatternID) {
2552  auto *D = static_cast<T *>(DBase);
2553  T *ExistingCanon = Existing->getCanonicalDecl();
2554  T *DCanon = D->getCanonicalDecl();
2555  if (ExistingCanon != DCanon) {
2556  assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2557  "already merged this declaration");
2558 
2559  // Have our redeclaration link point back at the canonical declaration
2560  // of the existing declaration, so that this declaration has the
2561  // appropriate canonical declaration.
2562  D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2563  D->First = ExistingCanon;
2564  ExistingCanon->Used |= D->Used;
2565  D->Used = false;
2566 
2567  // When we merge a namespace, update its pointer to the first namespace.
2568  // We cannot have loaded any redeclarations of this declaration yet, so
2569  // there's nothing else that needs to be updated.
2570  if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2571  Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2572  assert_cast<NamespaceDecl*>(ExistingCanon));
2573 
2574  // When we merge a template, merge its pattern.
2575  if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2576  mergeTemplatePattern(
2577  DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2578  TemplatePatternID, Redecl.isKeyDecl());
2579 
2580  // If this declaration is a key declaration, make a note of that.
2581  if (Redecl.isKeyDecl())
2582  Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2583  }
2584 }
2585 
2586 /// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2587 /// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2588 /// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2589 /// that some types are mergeable during deserialization, otherwise name
2590 /// lookup fails. This is the case for EnumConstantDecl.
2592  if (!ND)
2593  return false;
2594  // TODO: implement merge for other necessary decls.
2595  if (isa<EnumConstantDecl>(ND))
2596  return true;
2597  return false;
2598 }
2599 
2600 /// Attempts to merge the given declaration (D) with another declaration
2601 /// of the same entity, for the case where the entity is not actually
2602 /// redeclarable. This happens, for instance, when merging the fields of
2603 /// identical class definitions from two different modules.
2604 template<typename T>
2606  // If modules are not available, there is no reason to perform this merge.
2607  if (!Reader.getContext().getLangOpts().Modules)
2608  return;
2609 
2610  // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2611  // Note that C identically-named things in different translation units are
2612  // not redeclarations, but may still have compatible types, where ODR-like
2613  // semantics may apply.
2614  if (!Reader.getContext().getLangOpts().CPlusPlus &&
2615  !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2616  return;
2617 
2618  if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2619  if (T *Existing = ExistingRes)
2620  Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2621  Existing->getCanonicalDecl());
2622 }
2623 
2625  VisitDecl(D);
2626  unsigned NumVars = D->varlist_size();
2628  Vars.reserve(NumVars);
2629  for (unsigned i = 0; i != NumVars; ++i) {
2630  Vars.push_back(Record.readExpr());
2631  }
2632  D->setVars(Vars);
2633 }
2634 
2636  VisitDecl(D);
2637  unsigned NumClauses = D->clauselist_size();
2639  Clauses.reserve(NumClauses);
2640  OMPClauseReader ClauseReader(Record);
2641  for (unsigned I = 0; I != NumClauses; ++I)
2642  Clauses.push_back(ClauseReader.readClause());
2643  D->setClauses(Clauses);
2644 }
2645 
2647  VisitValueDecl(D);
2648  D->setLocation(ReadSourceLocation());
2649  Expr *In = Record.readExpr();
2650  Expr *Out = Record.readExpr();
2651  D->setCombinerData(In, Out);
2652  Expr *Combiner = Record.readExpr();
2653  D->setCombiner(Combiner);
2654  Expr *Orig = Record.readExpr();
2655  Expr *Priv = Record.readExpr();
2656  D->setInitializerData(Orig, Priv);
2657  Expr *Init = Record.readExpr();
2658  auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2659  D->setInitializer(Init, IK);
2660  D->PrevDeclInScope = ReadDeclID();
2661 }
2662 
2664  VisitValueDecl(D);
2665  D->setLocation(ReadSourceLocation());
2666  Expr *MapperVarRefE = Record.readExpr();
2667  D->setMapperVarRef(MapperVarRefE);
2668  D->VarName = Record.readDeclarationName();
2669  D->PrevDeclInScope = ReadDeclID();
2670  unsigned NumClauses = D->clauselist_size();
2672  Clauses.reserve(NumClauses);
2673  OMPClauseReader ClauseReader(Record);
2674  for (unsigned I = 0; I != NumClauses; ++I)
2675  Clauses.push_back(ClauseReader.readClause());
2676  D->setClauses(Clauses);
2677 }
2678 
2680  VisitVarDecl(D);
2681 }
2682 
2683 //===----------------------------------------------------------------------===//
2684 // Attribute Reading
2685 //===----------------------------------------------------------------------===//
2686 
2687 namespace {
2688 class AttrReader {
2689  ModuleFile *F;
2690  ASTReader *Reader;
2691  const ASTReader::RecordData &Record;
2692  unsigned &Idx;
2693 
2694 public:
2695  AttrReader(ModuleFile &F, ASTReader &Reader,
2696  const ASTReader::RecordData &Record, unsigned &Idx)
2697  : F(&F), Reader(&Reader), Record(Record), Idx(Idx) {}
2698 
2699  const uint64_t &readInt() { return Record[Idx++]; }
2700 
2701  SourceRange readSourceRange() {
2702  return Reader->ReadSourceRange(*F, Record, Idx);
2703  }
2704 
2705  Expr *readExpr() { return Reader->ReadExpr(*F); }
2706 
2707  std::string readString() {
2708  return Reader->ReadString(Record, Idx);
2709  }
2710 
2711  TypeSourceInfo *getTypeSourceInfo() {
2712  return Reader->GetTypeSourceInfo(*F, Record, Idx);
2713  }
2714 
2715  IdentifierInfo *getIdentifierInfo() {
2716  return Reader->GetIdentifierInfo(*F, Record, Idx);
2717  }
2718 
2719  VersionTuple readVersionTuple() {
2720  return ASTReader::ReadVersionTuple(Record, Idx);
2721  }
2722 
2723  template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2724  return cast_or_null<T>(Reader->GetLocalDecl(*F, LocalID));
2725  }
2726 };
2727 }
2728 
2730  unsigned &Idx) {
2731  AttrReader Record(M, *this, Rec, Idx);
2732  auto V = Record.readInt();
2733  if (!V)
2734  return nullptr;
2735 
2736  Attr *New = nullptr;
2737  // Kind is stored as a 1-based integer because 0 is used to indicate a null
2738  // Attr pointer.
2739  auto Kind = static_cast<attr::Kind>(V - 1);
2740  SourceRange Range = Record.readSourceRange();
2741  ASTContext &Context = getContext();
2742 
2743 #include "clang/Serialization/AttrPCHRead.inc"
2744 
2745  assert(New && "Unable to decode attribute?");
2746  return New;
2747 }
2748 
2749 /// Reads attributes from the current stream position.
2751  for (unsigned I = 0, E = Record.readInt(); I != E; ++I)
2752  Attrs.push_back(Record.readAttr());
2753 }
2754 
2755 //===----------------------------------------------------------------------===//
2756 // ASTReader Implementation
2757 //===----------------------------------------------------------------------===//
2758 
2759 /// Note that we have loaded the declaration with the given
2760 /// Index.
2761 ///
2762 /// This routine notes that this declaration has already been loaded,
2763 /// so that future GetDecl calls will return this declaration rather
2764 /// than trying to load a new declaration.
2765 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2766  assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2767  DeclsLoaded[Index] = D;
2768 }
2769 
2770 /// Determine whether the consumer will be interested in seeing
2771 /// this declaration (via HandleTopLevelDecl).
2772 ///
2773 /// This routine should return true for anything that might affect
2774 /// code generation, e.g., inline function definitions, Objective-C
2775 /// declarations with metadata, etc.
2776 static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2777  // An ObjCMethodDecl is never considered as "interesting" because its
2778  // implementation container always is.
2779 
2780  // An ImportDecl or VarDecl imported from a module map module will get
2781  // emitted when we import the relevant module.
2783  auto *M = D->getImportedOwningModule();
2784  if (M && M->Kind == Module::ModuleMapModule &&
2785  Ctx.DeclMustBeEmitted(D))
2786  return false;
2787  }
2788 
2789  if (isa<FileScopeAsmDecl>(D) ||
2790  isa<ObjCProtocolDecl>(D) ||
2791  isa<ObjCImplDecl>(D) ||
2792  isa<ImportDecl>(D) ||
2793  isa<PragmaCommentDecl>(D) ||
2794  isa<PragmaDetectMismatchDecl>(D))
2795  return true;
2796  if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D) ||
2797  isa<OMPDeclareMapperDecl>(D))
2798  return !D->getDeclContext()->isFunctionOrMethod();
2799  if (const auto *Var = dyn_cast<VarDecl>(D))
2800  return Var->isFileVarDecl() &&
2801  (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2802  OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2803  if (const auto *Func = dyn_cast<FunctionDecl>(D))
2804  return Func->doesThisDeclarationHaveABody() || HasBody;
2805 
2806  if (auto *ES = D->getASTContext().getExternalSource())
2807  if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2808  return true;
2809 
2810  return false;
2811 }
2812 
2813 /// Get the correct cursor and offset for loading a declaration.
2814 ASTReader::RecordLocation
2815 ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2816  GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2817  assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2818  ModuleFile *M = I->second;
2819  const DeclOffset &DOffs =
2820  M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2821  Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2822  return RecordLocation(M, DOffs.BitOffset);
2823 }
2824 
2825 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2826  auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2827 
2828  assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2829  return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2830 }
2831 
2832 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2833  return LocalOffset + M.GlobalBitOffset;
2834 }
2835 
2837  const TemplateParameterList *Y);
2838 
2839 /// Determine whether two template parameters are similar enough
2840 /// that they may be used in declarations of the same template.
2841 static bool isSameTemplateParameter(const NamedDecl *X,
2842  const NamedDecl *Y) {
2843  if (X->getKind() != Y->getKind())
2844  return false;
2845 
2846  if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2847  const auto *TY = cast<TemplateTypeParmDecl>(Y);
2848  return TX->isParameterPack() == TY->isParameterPack();
2849  }
2850 
2851  if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2852  const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2853  return TX->isParameterPack() == TY->isParameterPack() &&
2854  TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2855  }
2856 
2857  const auto *TX = cast<TemplateTemplateParmDecl>(X);
2858  const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2859  return TX->isParameterPack() == TY->isParameterPack() &&
2860  isSameTemplateParameterList(TX->getTemplateParameters(),
2861  TY->getTemplateParameters());
2862 }
2863 
2865  if (auto *NS = X->getAsNamespace())
2866  return NS;
2867  if (auto *NAS = X->getAsNamespaceAlias())
2868  return NAS->getNamespace();
2869  return nullptr;
2870 }
2871 
2873  const NestedNameSpecifier *Y) {
2874  if (auto *NSX = getNamespace(X)) {
2875  auto *NSY = getNamespace(Y);
2876  if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2877  return false;
2878  } else if (X->getKind() != Y->getKind())
2879  return false;
2880 
2881  // FIXME: For namespaces and types, we're permitted to check that the entity
2882  // is named via the same tokens. We should probably do so.
2883  switch (X->getKind()) {
2885  if (X->getAsIdentifier() != Y->getAsIdentifier())
2886  return false;
2887  break;
2890  // We've already checked that we named the same namespace.
2891  break;
2894  if (X->getAsType()->getCanonicalTypeInternal() !=
2896  return false;
2897  break;
2900  return true;
2901  }
2902 
2903  // Recurse into earlier portion of NNS, if any.
2904  auto *PX = X->getPrefix();
2905  auto *PY = Y->getPrefix();
2906  if (PX && PY)
2907  return isSameQualifier(PX, PY);
2908  return !PX && !PY;
2909 }
2910 
2911 /// Determine whether two template parameter lists are similar enough
2912 /// that they may be used in declarations of the same template.
2914  const TemplateParameterList *Y) {
2915  if (X->size() != Y->size())
2916  return false;
2917 
2918  for (unsigned I = 0, N = X->size(); I != N; ++I)
2919  if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2920  return false;
2921 
2922  return true;
2923 }
2924 
2925 /// Determine whether the attributes we can overload on are identical for A and
2926 /// B. Will ignore any overloadable attrs represented in the type of A and B.
2928  const FunctionDecl *B) {
2929  // Note that pass_object_size attributes are represented in the function's
2930  // ExtParameterInfo, so we don't need to check them here.
2931 
2932  llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2933  auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
2934  auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
2935 
2936  for (auto Pair : zip_longest(AEnableIfAttrs, BEnableIfAttrs)) {
2937  Optional<EnableIfAttr *> Cand1A = std::get<0>(Pair);
2938  Optional<EnableIfAttr *> Cand2A = std::get<1>(Pair);
2939 
2940  // Return false if the number of enable_if attributes is different.
2941  if (!Cand1A || !Cand2A)
2942  return false;
2943 
2944  Cand1ID.clear();
2945  Cand2ID.clear();
2946 
2947  (*Cand1A)->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2948  (*Cand2A)->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2949 
2950  // Return false if any of the enable_if expressions of A and B are
2951  // different.
2952  if (Cand1ID != Cand2ID)
2953  return false;
2954  }
2955  return true;
2956 }
2957 
2958 /// Determine whether the two declarations refer to the same entity.
2959 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2960  assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2961 
2962  if (X == Y)
2963  return true;
2964 
2965  // Must be in the same context.
2966  //
2967  // Note that we can't use DeclContext::Equals here, because the DeclContexts
2968  // could be two different declarations of the same function. (We will fix the
2969  // semantic DC to refer to the primary definition after merging.)
2970  if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
2971  cast<Decl>(Y->getDeclContext()->getRedeclContext())))
2972  return false;
2973 
2974  // Two typedefs refer to the same entity if they have the same underlying
2975  // type.
2976  if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
2977  if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2978  return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2979  TypedefY->getUnderlyingType());
2980 
2981  // Must have the same kind.
2982  if (X->getKind() != Y->getKind())
2983  return false;
2984 
2985  // Objective-C classes and protocols with the same name always match.
2986  if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2987  return true;
2988 
2989  if (isa<ClassTemplateSpecializationDecl>(X)) {
2990  // No need to handle these here: we merge them when adding them to the
2991  // template.
2992  return false;
2993  }
2994 
2995  // Compatible tags match.
2996  if (const auto *TagX = dyn_cast<TagDecl>(X)) {
2997  const auto *TagY = cast<TagDecl>(Y);
2998  return (TagX->getTagKind() == TagY->getTagKind()) ||
2999  ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
3000  TagX->getTagKind() == TTK_Interface) &&
3001  (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
3002  TagY->getTagKind() == TTK_Interface));
3003  }
3004 
3005  // Functions with the same type and linkage match.
3006  // FIXME: This needs to cope with merging of prototyped/non-prototyped
3007  // functions, etc.
3008  if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
3009  const auto *FuncY = cast<FunctionDecl>(Y);
3010  if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
3011  const auto *CtorY = cast<CXXConstructorDecl>(Y);
3012  if (CtorX->getInheritedConstructor() &&
3013  !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
3014  CtorY->getInheritedConstructor().getConstructor()))
3015  return false;
3016  }
3017 
3018  if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
3019  return false;
3020 
3021  // Multiversioned functions with different feature strings are represented
3022  // as separate declarations.
3023  if (FuncX->isMultiVersion()) {
3024  const auto *TAX = FuncX->getAttr<TargetAttr>();
3025  const auto *TAY = FuncY->getAttr<TargetAttr>();
3026  assert(TAX && TAY && "Multiversion Function without target attribute");
3027 
3028  if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
3029  return false;
3030  }
3031 
3032  ASTContext &C = FuncX->getASTContext();
3033  auto GetTypeAsWritten = [](const FunctionDecl *FD) {
3034  // Map to the first declaration that we've already merged into this one.
3035  // The TSI of redeclarations might not match (due to calling conventions
3036  // being inherited onto the type but not the TSI), but the TSI type of
3037  // the first declaration of the function should match across modules.
3038  FD = FD->getCanonicalDecl();
3039  return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3040  : FD->getType();
3041  };
3042  QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3043  if (!C.hasSameType(XT, YT)) {
3044  // We can get functions with different types on the redecl chain in C++17
3045  // if they have differing exception specifications and at least one of
3046  // the excpetion specs is unresolved.
3047  auto *XFPT = XT->getAs<FunctionProtoType>();
3048  auto *YFPT = YT->getAs<FunctionProtoType>();
3049  if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3050  (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3053  return true;
3054  return false;
3055  }
3056  return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3057  hasSameOverloadableAttrs(FuncX, FuncY);
3058  }
3059 
3060  // Variables with the same type and linkage match.
3061  if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3062  const auto *VarY = cast<VarDecl>(Y);
3063  if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3064  ASTContext &C = VarX->getASTContext();
3065  if (C.hasSameType(VarX->getType(), VarY->getType()))
3066  return true;
3067 
3068  // We can get decls with different types on the redecl chain. Eg.
3069  // template <typename T> struct S { static T Var[]; }; // #1
3070  // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3071  // Only? happens when completing an incomplete array type. In this case
3072  // when comparing #1 and #2 we should go through their element type.
3073  const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3074  const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3075  if (!VarXTy || !VarYTy)
3076  return false;
3077  if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3078  return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3079  }
3080  return false;
3081  }
3082 
3083  // Namespaces with the same name and inlinedness match.
3084  if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3085  const auto *NamespaceY = cast<NamespaceDecl>(Y);
3086  return NamespaceX->isInline() == NamespaceY->isInline();
3087  }
3088 
3089  // Identical template names and kinds match if their template parameter lists
3090  // and patterns match.
3091  if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3092  const auto *TemplateY = cast<TemplateDecl>(Y);
3093  return isSameEntity(TemplateX->getTemplatedDecl(),
3094  TemplateY->getTemplatedDecl()) &&
3095  isSameTemplateParameterList(TemplateX->getTemplateParameters(),
3096  TemplateY->getTemplateParameters());
3097  }
3098 
3099  // Fields with the same name and the same type match.
3100  if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3101  const auto *FDY = cast<FieldDecl>(Y);
3102  // FIXME: Also check the bitwidth is odr-equivalent, if any.
3103  return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3104  }
3105 
3106  // Indirect fields with the same target field match.
3107  if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3108  const auto *IFDY = cast<IndirectFieldDecl>(Y);
3109  return IFDX->getAnonField()->getCanonicalDecl() ==
3110  IFDY->getAnonField()->getCanonicalDecl();
3111  }
3112 
3113  // Enumerators with the same name match.
3114  if (isa<EnumConstantDecl>(X))
3115  // FIXME: Also check the value is odr-equivalent.
3116  return true;
3117 
3118  // Using shadow declarations with the same target match.
3119  if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3120  const auto *USY = cast<UsingShadowDecl>(Y);
3121  return USX->getTargetDecl() == USY->getTargetDecl();
3122  }
3123 
3124  // Using declarations with the same qualifier match. (We already know that
3125  // the name matches.)
3126  if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3127  const auto *UY = cast<UsingDecl>(Y);
3128  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3129  UX->hasTypename() == UY->hasTypename() &&
3130  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3131  }
3132  if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3133  const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3134  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3135  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3136  }
3137  if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3138  return isSameQualifier(
3139  UX->getQualifier(),
3140  cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3141 
3142  // Namespace alias definitions with the same target match.
3143  if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3144  const auto *NAY = cast<NamespaceAliasDecl>(Y);
3145  return NAX->getNamespace()->Equals(NAY->getNamespace());
3146  }
3147 
3148  return false;
3149 }
3150 
3151 /// Find the context in which we should search for previous declarations when
3152 /// looking for declarations to merge.
3153 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3154  DeclContext *DC) {
3155  if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3156  return ND->getOriginalNamespace();
3157 
3158  if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3159  // Try to dig out the definition.
3160  auto *DD = RD->DefinitionData;
3161  if (!DD)
3162  DD = RD->getCanonicalDecl()->DefinitionData;
3163 
3164  // If there's no definition yet, then DC's definition is added by an update
3165  // record, but we've not yet loaded that update record. In this case, we
3166  // commit to DC being the canonical definition now, and will fix this when
3167  // we load the update record.
3168  if (!DD) {
3169  DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3170  RD->setCompleteDefinition(true);
3171  RD->DefinitionData = DD;
3172  RD->getCanonicalDecl()->DefinitionData = DD;
3173 
3174  // Track that we did this horrible thing so that we can fix it later.
3175  Reader.PendingFakeDefinitionData.insert(
3176  std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3177  }
3178 
3179  return DD->Definition;
3180  }
3181 
3182  if (auto *ED = dyn_cast<EnumDecl>(DC))
3183  return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3184  : nullptr;
3185 
3186  // We can see the TU here only if we have no Sema object. In that case,
3187  // there's no TU scope to look in, so using the DC alone is sufficient.
3188  if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3189  return TU;
3190 
3191  return nullptr;
3192 }
3193 
3194 ASTDeclReader::FindExistingResult::~FindExistingResult() {
3195  // Record that we had a typedef name for linkage whether or not we merge
3196  // with that declaration.
3197  if (TypedefNameForLinkage) {
3198  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3199  Reader.ImportedTypedefNamesForLinkage.insert(
3200  std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3201  return;
3202  }
3203 
3204  if (!AddResult || Existing)
3205  return;
3206 
3207  DeclarationName Name = New->getDeclName();
3208  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3210  setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3211  AnonymousDeclNumber, New);
3212  } else if (DC->isTranslationUnit() &&
3213  !Reader.getContext().getLangOpts().CPlusPlus) {
3214  if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3215  Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3216  .push_back(New);
3217  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3218  // Add the declaration to its redeclaration context so later merging
3219  // lookups will find it.
3220  MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3221  }
3222 }
3223 
3224 /// Find the declaration that should be merged into, given the declaration found
3225 /// by name lookup. If we're merging an anonymous declaration within a typedef,
3226 /// we need a matching typedef, and we merge with the type inside it.
3228  bool IsTypedefNameForLinkage) {
3229  if (!IsTypedefNameForLinkage)
3230  return Found;
3231 
3232  // If we found a typedef declaration that gives a name to some other
3233  // declaration, then we want that inner declaration. Declarations from
3234  // AST files are handled via ImportedTypedefNamesForLinkage.
3235  if (Found->isFromASTFile())
3236  return nullptr;
3237 
3238  if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3239  return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3240 
3241  return nullptr;
3242 }
3243 
3244 /// Find the declaration to use to populate the anonymous declaration table
3245 /// for the given lexical DeclContext. We only care about finding local
3246 /// definitions of the context; we'll merge imported ones as we go.
3247 DeclContext *
3248 ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3249  // For classes, we track the definition as we merge.
3250  if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3251  auto *DD = RD->getCanonicalDecl()->DefinitionData;
3252  return DD ? DD->Definition : nullptr;
3253  }
3254 
3255  // For anything else, walk its merged redeclarations looking for a definition.
3256  // Note that we can't just call getDefinition here because the redeclaration
3257  // chain isn't wired up.
3258  for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3259  if (auto *FD = dyn_cast<FunctionDecl>(D))
3260  if (FD->isThisDeclarationADefinition())
3261  return FD;
3262  if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3263  if (MD->isThisDeclarationADefinition())
3264  return MD;
3265  }
3266 
3267  // No merged definition yet.
3268  return nullptr;
3269 }
3270 
3271 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3272  DeclContext *DC,
3273  unsigned Index) {
3274  // If the lexical context has been merged, look into the now-canonical
3275  // definition.
3276  auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3277 
3278  // If we've seen this before, return the canonical declaration.
3279  auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3280  if (Index < Previous.size() && Previous[Index])
3281  return Previous[Index];
3282 
3283  // If this is the first time, but we have parsed a declaration of the context,
3284  // build the anonymous declaration list from the parsed declaration.
3285  auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3286  if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3287  numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3288  if (Previous.size() == Number)
3289  Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3290  else
3291  Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3292  });
3293  }
3294 
3295  return Index < Previous.size() ? Previous[Index] : nullptr;
3296 }
3297 
3298 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3299  DeclContext *DC, unsigned Index,
3300  NamedDecl *D) {
3301  auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3302 
3303  auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3304  if (Index >= Previous.size())
3305  Previous.resize(Index + 1);
3306  if (!Previous[Index])
3307  Previous[Index] = D;
3308 }
3309 
3310 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3311  DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3312  : D->getDeclName();
3313 
3314  if (!Name && !needsAnonymousDeclarationNumber(D)) {
3315  // Don't bother trying to find unnamed declarations that are in
3316  // unmergeable contexts.
3317  FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3318  AnonymousDeclNumber, TypedefNameForLinkage);
3319  Result.suppress();
3320  return Result;
3321  }
3322 
3324  if (TypedefNameForLinkage) {
3325  auto It = Reader.ImportedTypedefNamesForLinkage.find(
3326  std::make_pair(DC, TypedefNameForLinkage));
3327  if (It != Reader.ImportedTypedefNamesForLinkage.end())
3328  if (isSameEntity(It->second, D))
3329  return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3330  TypedefNameForLinkage);
3331  // Go on to check in other places in case an existing typedef name
3332  // was not imported.
3333  }
3334 
3336  // This is an anonymous declaration that we may need to merge. Look it up
3337  // in its context by number.
3338  if (auto *Existing = getAnonymousDeclForMerging(
3339  Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3340  if (isSameEntity(Existing, D))
3341  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3342  TypedefNameForLinkage);
3343  } else if (DC->isTranslationUnit() &&
3344  !Reader.getContext().getLangOpts().CPlusPlus) {
3345  IdentifierResolver &IdResolver = Reader.getIdResolver();
3346 
3347  // Temporarily consider the identifier to be up-to-date. We don't want to
3348  // cause additional lookups here.
3349  class UpToDateIdentifierRAII {
3350  IdentifierInfo *II;
3351  bool WasOutToDate = false;
3352 
3353  public:
3354  explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3355  if (II) {
3356  WasOutToDate = II->isOutOfDate();
3357  if (WasOutToDate)
3358  II->setOutOfDate(false);
3359  }
3360  }
3361 
3362  ~UpToDateIdentifierRAII() {
3363  if (WasOutToDate)
3364  II->setOutOfDate(true);
3365  }
3366  } UpToDate(Name.getAsIdentifierInfo());
3367 
3368  for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3369  IEnd = IdResolver.end();
3370  I != IEnd; ++I) {
3371  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3372  if (isSameEntity(Existing, D))
3373  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3374  TypedefNameForLinkage);
3375  }
3376  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3377  DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3378  for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3379  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3380  if (isSameEntity(Existing, D))
3381  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3382  TypedefNameForLinkage);
3383  }
3384  } else {
3385  // Not in a mergeable context.
3386  return FindExistingResult(Reader);
3387  }
3388 
3389  // If this declaration is from a merged context, make a note that we need to
3390  // check that the canonical definition of that context contains the decl.
3391  //
3392  // FIXME: We should do something similar if we merge two definitions of the
3393  // same template specialization into the same CXXRecordDecl.
3394  auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3395  if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3396  MergedDCIt->second == D->getDeclContext())
3397  Reader.PendingOdrMergeChecks.push_back(D);
3398 
3399  return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3400  AnonymousDeclNumber, TypedefNameForLinkage);
3401 }
3402 
3403 template<typename DeclT>
3405  return D->RedeclLink.getLatestNotUpdated();
3406 }
3407 
3409  llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3410 }
3411 
3413  assert(D);
3414 
3415  switch (D->getKind()) {
3416 #define ABSTRACT_DECL(TYPE)
3417 #define DECL(TYPE, BASE) \
3418  case Decl::TYPE: \
3419  return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3420 #include "clang/AST/DeclNodes.inc"
3421  }
3422  llvm_unreachable("unknown decl kind");
3423 }
3424 
3425 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3427 }
3428 
3429 template<typename DeclT>
3432  Decl *Previous, Decl *Canon) {
3433  D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3434  D->First = cast<DeclT>(Previous)->First;
3435 }
3436 
3437 namespace clang {
3438 
3439 template<>
3442  Decl *Previous, Decl *Canon) {
3443  auto *VD = static_cast<VarDecl *>(D);
3444  auto *PrevVD = cast<VarDecl>(Previous);
3445  D->RedeclLink.setPrevious(PrevVD);
3446  D->First = PrevVD->First;
3447 
3448  // We should keep at most one definition on the chain.
3449  // FIXME: Cache the definition once we've found it. Building a chain with
3450  // N definitions currently takes O(N^2) time here.
3451  if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3452  for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3453  if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3454  Reader.mergeDefinitionVisibility(CurD, VD);
3455  VD->demoteThisDefinitionToDeclaration();
3456  break;
3457  }
3458  }
3459  }
3460 }
3461 
3463  auto *DT = T->getContainedDeducedType();
3464  return DT && !DT->isDeduced();
3465 }
3466 
3467 template<>
3470  Decl *Previous, Decl *Canon) {
3471  auto *FD = static_cast<FunctionDecl *>(D);
3472  auto *PrevFD = cast<FunctionDecl>(Previous);
3473 
3474  FD->RedeclLink.setPrevious(PrevFD);
3475  FD->First = PrevFD->First;
3476 
3477  // If the previous declaration is an inline function declaration, then this
3478  // declaration is too.
3479  if (PrevFD->isInlined() != FD->isInlined()) {
3480  // FIXME: [dcl.fct.spec]p4:
3481  // If a function with external linkage is declared inline in one
3482  // translation unit, it shall be declared inline in all translation
3483  // units in which it appears.
3484  //
3485  // Be careful of this case:
3486  //
3487  // module A:
3488  // template<typename T> struct X { void f(); };
3489  // template<typename T> inline void X<T>::f() {}
3490  //
3491  // module B instantiates the declaration of X<int>::f
3492  // module C instantiates the definition of X<int>::f
3493  //
3494  // If module B and C are merged, we do not have a violation of this rule.
3495  FD->setImplicitlyInline(true);
3496  }
3497 
3498  auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3499  auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3500  if (FPT && PrevFPT) {
3501  // If we need to propagate an exception specification along the redecl
3502  // chain, make a note of that so that we can do so later.
3503  bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3504  bool WasUnresolved =
3506  if (IsUnresolved != WasUnresolved)
3507  Reader.PendingExceptionSpecUpdates.insert(
3508  {Canon, IsUnresolved ? PrevFD : FD});
3509 
3510  // If we need to propagate a deduced return type along the redecl chain,
3511  // make a note of that so that we can do it later.
3512  bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3513  bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3514  if (IsUndeduced != WasUndeduced)
3515  Reader.PendingDeducedTypeUpdates.insert(
3516  {cast<FunctionDecl>(Canon),
3517  (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3518  }
3519 }
3520 
3521 } // namespace clang
3522 
3524  llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3525 }
3526 
3527 /// Inherit the default template argument from \p From to \p To. Returns
3528 /// \c false if there is no default template for \p From.
3529 template <typename ParmDecl>
3530 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3531  Decl *ToD) {
3532  auto *To = cast<ParmDecl>(ToD);
3533  if (!From->hasDefaultArgument())
3534  return false;
3535  To->setInheritedDefaultArgument(Context, From);
3536  return true;
3537 }
3538 
3540  TemplateDecl *From,
3541  TemplateDecl *To) {
3542  auto *FromTP = From->getTemplateParameters();
3543  auto *ToTP = To->getTemplateParameters();
3544  assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3545 
3546  for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3547  NamedDecl *FromParam = FromTP->getParam(I);
3548  NamedDecl *ToParam = ToTP->getParam(I);
3549 
3550  if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3551  inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3552  else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3553  inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3554  else
3556  Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3557  }
3558 }
3559 
3561  Decl *Previous, Decl *Canon) {
3562  assert(D && Previous);
3563 
3564  switch (D->getKind()) {
3565 #define ABSTRACT_DECL(TYPE)
3566 #define DECL(TYPE, BASE) \
3567  case Decl::TYPE: \
3568  attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3569  break;
3570 #include "clang/AST/DeclNodes.inc"
3571  }
3572 
3573  // If the declaration was visible in one module, a redeclaration of it in
3574  // another module remains visible even if it wouldn't be visible by itself.
3575  //
3576  // FIXME: In this case, the declaration should only be visible if a module
3577  // that makes it visible has been imported.
3578  D->IdentifierNamespace |=
3579  Previous->IdentifierNamespace &
3581 
3582  // If the declaration declares a template, it may inherit default arguments
3583  // from the previous declaration.
3584  if (auto *TD = dyn_cast<TemplateDecl>(D))
3586  cast<TemplateDecl>(Previous), TD);
3587 }
3588 
3589 template<typename DeclT>
3591  D->RedeclLink.setLatest(cast<DeclT>(Latest));
3592 }
3593 
3595  llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3596 }
3597 
3599  assert(D && Latest);
3600 
3601  switch (D->getKind()) {
3602 #define ABSTRACT_DECL(TYPE)
3603 #define DECL(TYPE, BASE) \
3604  case Decl::TYPE: \
3605  attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3606  break;
3607 #include "clang/AST/DeclNodes.inc"
3608  }
3609 }
3610 
3611 template<typename DeclT>
3613  D->RedeclLink.markIncomplete();
3614 }
3615 
3617  llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3618 }
3619 
3620 void ASTReader::markIncompleteDeclChain(Decl *D) {
3621  switch (D->getKind()) {
3622 #define ABSTRACT_DECL(TYPE)
3623 #define DECL(TYPE, BASE) \
3624  case Decl::TYPE: \
3625  ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3626  break;
3627 #include "clang/AST/DeclNodes.inc"
3628  }
3629 }
3630 
3631 /// Read the declaration at the given offset from the AST file.
3632 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3633  unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3634  SourceLocation DeclLoc;
3635  RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3636  llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3637  // Keep track of where we are in the stream, then jump back there
3638  // after reading this declaration.
3639  SavedStreamPosition SavedPosition(DeclsCursor);
3640 
3641  ReadingKindTracker ReadingKind(Read_Decl, *this);
3642 
3643  // Note that we are loading a declaration record.
3644  Deserializing ADecl(this);
3645 
3646  DeclsCursor.JumpToBit(Loc.Offset);
3647  ASTRecordReader Record(*this, *Loc.F);
3648  ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3649  unsigned Code = DeclsCursor.ReadCode();
3650 
3651  ASTContext &Context = getContext();
3652  Decl *D = nullptr;
3653  switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3654  case DECL_CONTEXT_LEXICAL:
3655  case DECL_CONTEXT_VISIBLE:
3656  llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3657  case DECL_TYPEDEF:
3658  D = TypedefDecl::CreateDeserialized(Context, ID);
3659  break;
3660  case DECL_TYPEALIAS:
3661  D = TypeAliasDecl::CreateDeserialized(Context, ID);
3662  break;
3663  case DECL_ENUM:
3664  D = EnumDecl::CreateDeserialized(Context, ID);
3665  break;
3666  case DECL_RECORD:
3667  D = RecordDecl::CreateDeserialized(Context, ID);
3668  break;
3669  case DECL_ENUM_CONSTANT:
3670  D = EnumConstantDecl::CreateDeserialized(Context, ID);
3671  break;
3672  case DECL_FUNCTION:
3673  D = FunctionDecl::CreateDeserialized(Context, ID);
3674  break;
3675  case DECL_LINKAGE_SPEC:
3676  D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3677  break;
3678  case DECL_EXPORT:
3679  D = ExportDecl::CreateDeserialized(Context, ID);
3680  break;
3681  case DECL_LABEL:
3682  D = LabelDecl::CreateDeserialized(Context, ID);
3683  break;
3684  case DECL_NAMESPACE:
3685  D = NamespaceDecl::CreateDeserialized(Context, ID);
3686  break;
3687  case DECL_NAMESPACE_ALIAS:
3688  D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3689  break;
3690  case DECL_USING:
3691  D = UsingDecl::CreateDeserialized(Context, ID);
3692  break;
3693  case DECL_USING_PACK:
3694  D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3695  break;
3696  case DECL_USING_SHADOW:
3697  D = UsingShadowDecl::CreateDeserialized(Context, ID);
3698  break;
3701  break;
3702  case DECL_USING_DIRECTIVE:
3703  D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3704  break;
3707  break;
3710  break;
3711  case DECL_CXX_RECORD:
3712  D = CXXRecordDecl::CreateDeserialized(Context, ID);
3713  break;
3716  break;
3717  case DECL_CXX_METHOD:
3718  D = CXXMethodDecl::CreateDeserialized(Context, ID);
3719  break;
3720  case DECL_CXX_CONSTRUCTOR:
3721  D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3722  break;
3724  D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3725  break;
3726  case DECL_CXX_DESTRUCTOR:
3727  D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3728  break;
3729  case DECL_CXX_CONVERSION:
3730  D = CXXConversionDecl::CreateDeserialized(Context, ID);
3731  break;
3732  case DECL_ACCESS_SPEC:
3733  D = AccessSpecDecl::CreateDeserialized(Context, ID);
3734  break;
3735  case DECL_FRIEND:
3736  D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3737  break;
3738  case DECL_FRIEND_TEMPLATE:
3739  D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3740  break;
3741  case DECL_CLASS_TEMPLATE:
3742  D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3743  break;
3746  break;
3749  break;
3750  case DECL_VAR_TEMPLATE:
3751  D = VarTemplateDecl::CreateDeserialized(Context, ID);
3752  break;
3755  break;
3758  break;
3761  break;
3764  break;
3767  break;
3770  break;
3773  Record.readInt());
3774  break;
3777  break;
3780  Record.readInt());
3781  break;
3784  break;
3785  case DECL_STATIC_ASSERT:
3786  D = StaticAssertDecl::CreateDeserialized(Context, ID);
3787  break;
3788  case DECL_OBJC_METHOD:
3789  D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3790  break;
3791  case DECL_OBJC_INTERFACE:
3792  D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3793  break;
3794  case DECL_OBJC_IVAR:
3795  D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3796  break;
3797  case DECL_OBJC_PROTOCOL:
3798  D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3799  break;
3801  D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3802  break;
3803  case DECL_OBJC_CATEGORY:
3804  D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3805  break;
3808  break;
3811  break;
3814  break;
3815  case DECL_OBJC_PROPERTY:
3816  D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3817  break;
3820  break;
3821  case DECL_FIELD:
3822  D = FieldDecl::CreateDeserialized(Context, ID);
3823  break;
3824  case DECL_INDIRECTFIELD:
3825  D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3826  break;
3827  case DECL_VAR:
3828  D = VarDecl::CreateDeserialized(Context, ID);
3829  break;
3830  case DECL_IMPLICIT_PARAM:
3831  D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3832  break;
3833  case DECL_PARM_VAR:
3834  D = ParmVarDecl::CreateDeserialized(Context, ID);
3835  break;
3836  case DECL_DECOMPOSITION:
3837  D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3838  break;
3839  case DECL_BINDING:
3840  D = BindingDecl::CreateDeserialized(Context, ID);
3841  break;
3842  case DECL_FILE_SCOPE_ASM:
3843  D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3844  break;
3845  case DECL_BLOCK:
3846  D = BlockDecl::CreateDeserialized(Context, ID);
3847  break;
3848  case DECL_MS_PROPERTY:
3849  D = MSPropertyDecl::CreateDeserialized(Context, ID);
3850  break;
3851  case DECL_CAPTURED:
3852  D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3853  break;
3855  Error("attempt to read a C++ base-specifier record as a declaration");
3856  return nullptr;
3858  Error("attempt to read a C++ ctor initializer record as a declaration");
3859  return nullptr;
3860  case DECL_IMPORT:
3861  // Note: last entry of the ImportDecl record is the number of stored source
3862  // locations.
3863  D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3864  break;
3866  D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3867  break;
3868  case DECL_OMP_REQUIRES:
3869  D = OMPRequiresDecl::CreateDeserialized(Context, ID, Record.readInt());
3870  break;
3873  break;
3875  D = OMPDeclareMapperDecl::CreateDeserialized(Context, ID, Record.readInt());
3876  break;
3877  case DECL_OMP_CAPTUREDEXPR:
3878  D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3879  break;
3880  case DECL_PRAGMA_COMMENT:
3881  D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3882  break;
3885  Record.readInt());
3886  break;
3887  case DECL_EMPTY:
3888  D = EmptyDecl::CreateDeserialized(Context, ID);
3889  break;
3890  case DECL_OBJC_TYPE_PARAM:
3891  D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3892  break;
3893  }
3894 
3895  assert(D && "Unknown declaration reading AST file");
3896  LoadedDecl(Index, D);
3897  // Set the DeclContext before doing any deserialization, to make sure internal
3898  // calls to Decl::getASTContext() by Decl's methods will find the
3899  // TranslationUnitDecl without crashing.
3900  D->setDeclContext(Context.getTranslationUnitDecl());
3901  Reader.Visit(D);
3902 
3903  // If this declaration is also a declaration context, get the
3904  // offsets for its tables of lexical and visible declarations.
3905  if (auto *DC = dyn_cast<DeclContext>(D)) {
3906  std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3907  if (Offsets.first &&
3908  ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3909  return nullptr;
3910  if (Offsets.second &&
3911  ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3912  return nullptr;
3913  }
3914  assert(Record.getIdx() == Record.size());
3915 
3916  // Load any relevant update records.
3917  PendingUpdateRecords.push_back(
3918  PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3919 
3920  // Load the categories after recursive loading is finished.
3921  if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3922  // If we already have a definition when deserializing the ObjCInterfaceDecl,
3923  // we put the Decl in PendingDefinitions so we can pull the categories here.
3924  if (Class->isThisDeclarationADefinition() ||
3925  PendingDefinitions.count(Class))
3926  loadObjCCategories(ID, Class);
3927 
3928  // If we have deserialized a declaration that has a definition the
3929  // AST consumer might need to know about, queue it.
3930  // We don't pass it to the consumer immediately because we may be in recursive
3931  // loading, and some declarations may still be initializing.
3932  PotentiallyInterestingDecls.push_back(
3933  InterestingDecl(D, Reader.hasPendingBody()));
3934 
3935  return D;
3936 }
3937 
3938 void ASTReader::PassInterestingDeclsToConsumer() {
3939  assert(Consumer);
3940 
3941  if (PassingDeclsToConsumer)
3942  return;
3943 
3944  // Guard variable to avoid recursively redoing the process of passing
3945  // decls to consumer.
3946  SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3947  true);
3948 
3949  // Ensure that we've loaded all potentially-interesting declarations
3950  // that need to be eagerly loaded.
3951  for (auto ID : EagerlyDeserializedDecls)
3952  GetDecl(ID);
3953  EagerlyDeserializedDecls.clear();
3954 
3955  while (!PotentiallyInterestingDecls.empty()) {
3956  InterestingDecl D = PotentiallyInterestingDecls.front();
3957  PotentiallyInterestingDecls.pop_front();
3958  if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3959  PassInterestingDeclToConsumer(D.getDecl());
3960  }
3961 }
3962 
3963 void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3964  // The declaration may have been modified by files later in the chain.
3965  // If this is the case, read the record containing the updates from each file
3966  // and pass it to ASTDeclReader to make the modifications.
3967  serialization::GlobalDeclID ID = Record.ID;
3968  Decl *D = Record.D;
3969  ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3970  DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3971 
3972  SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3973 
3974  if (UpdI != DeclUpdateOffsets.end()) {
3975  auto UpdateOffsets = std::move(UpdI->second);
3976  DeclUpdateOffsets.erase(UpdI);
3977 
3978  // Check if this decl was interesting to the consumer. If we just loaded
3979  // the declaration, then we know it was interesting and we skip the call
3980  // to isConsumerInterestedIn because it is unsafe to call in the
3981  // current ASTReader state.
3982  bool WasInteresting =
3983  Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
3984  for (auto &FileAndOffset : UpdateOffsets) {
3985  ModuleFile *F = FileAndOffset.first;
3986  uint64_t Offset = FileAndOffset.second;
3987  llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3988  SavedStreamPosition SavedPosition(Cursor);
3989  Cursor.JumpToBit(Offset);
3990  unsigned Code = Cursor.ReadCode();
3991  ASTRecordReader Record(*this, *F);
3992  unsigned RecCode = Record.readRecord(Cursor, Code);
3993  (void)RecCode;
3994  assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3995 
3996  ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
3997  SourceLocation());
3998  Reader.UpdateDecl(D, PendingLazySpecializationIDs);
3999 
4000  // We might have made this declaration interesting. If so, remember that
4001  // we need to hand it off to the consumer.
4002  if (!WasInteresting &&
4003  isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
4004  PotentiallyInterestingDecls.push_back(
4005  InterestingDecl(D, Reader.hasPendingBody()));
4006  WasInteresting = true;
4007  }
4008  }
4009  }
4010  // Add the lazy specializations to the template.
4011  assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||
4012  isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&
4013  "Must not have pending specializations");
4014  if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
4015  ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
4016  else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4017  ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
4018  else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4019  ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4020  PendingLazySpecializationIDs.clear();
4021 
4022  // Load the pending visible updates for this decl context, if it has any.
4023  auto I = PendingVisibleUpdates.find(ID);
4024  if (I != PendingVisibleUpdates.end()) {
4025  auto VisibleUpdates = std::move(I->second);
4026  PendingVisibleUpdates.erase(I);
4027 
4028  auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4029  for (const auto &Update : VisibleUpdates)
4030  Lookups[DC].Table.add(
4031  Update.Mod, Update.Data,
4033  DC->setHasExternalVisibleStorage(true);
4034  }
4035 }
4036 
4037 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4038  // Attach FirstLocal to the end of the decl chain.
4039  Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4040  if (FirstLocal != CanonDecl) {
4041  Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4043  *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4044  CanonDecl);
4045  }
4046 
4047  if (!LocalOffset) {
4048  ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4049  return;
4050  }
4051 
4052  // Load the list of other redeclarations from this module file.
4053  ModuleFile *M = getOwningModuleFile(FirstLocal);
4054  assert(M && "imported decl from no module file");
4055 
4056  llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4057  SavedStreamPosition SavedPosition(Cursor);
4058  Cursor.JumpToBit(LocalOffset);
4059 
4060  RecordData Record;
4061  unsigned Code = Cursor.ReadCode();
4062  unsigned RecCode = Cursor.readRecord(Code, Record);
4063  (void)RecCode;
4064  assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
4065 
4066  // FIXME: We have several different dispatches on decl kind here; maybe
4067  // we should instead generate one loop per kind and dispatch up-front?
4068  Decl *MostRecent = FirstLocal;
4069  for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4070  auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4071  ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4072  MostRecent = D;
4073  }
4074  ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4075 }
4076 
4077 namespace {
4078 
4079  /// Given an ObjC interface, goes through the modules and links to the
4080  /// interface all the categories for it.
4081  class ObjCCategoriesVisitor {
4082  ASTReader &Reader;
4083  ObjCInterfaceDecl *Interface;
4084  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4085  ObjCCategoryDecl *Tail = nullptr;
4086  llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4087  serialization::GlobalDeclID InterfaceID;
4088  unsigned PreviousGeneration;
4089 
4090  void add(ObjCCategoryDecl *Cat) {
4091  // Only process each category once.
4092  if (!Deserialized.erase(Cat))
4093  return;
4094 
4095  // Check for duplicate categories.
4096  if (Cat->getDeclName()) {
4097  ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4098  if (Existing &&
4099  Reader.getOwningModuleFile(Existing)
4100  != Reader.getOwningModuleFile(Cat)) {
4101  // FIXME: We should not warn for duplicates in diamond:
4102  //
4103  // MT //
4104  // / \ //
4105  // ML MR //
4106  // \ / //
4107  // MB //
4108  //
4109  // If there are duplicates in ML/MR, there will be warning when
4110  // creating MB *and* when importing MB. We should not warn when
4111  // importing.
4112  Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4113  << Interface->getDeclName() << Cat->getDeclName();
4114  Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4115  } else if (!Existing) {
4116  // Record this category.
4117  Existing = Cat;
4118  }
4119  }
4120 
4121  // Add this category to the end of the chain.
4122  if (Tail)
4124  else
4125  Interface->setCategoryListRaw(Cat);
4126  Tail = Cat;
4127  }
4128 
4129  public:
4130  ObjCCategoriesVisitor(ASTReader &Reader,
4131  ObjCInterfaceDecl *Interface,
4132  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4133  serialization::GlobalDeclID InterfaceID,
4134  unsigned PreviousGeneration)
4135  : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4136  InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4137  // Populate the name -> category map with the set of known categories.
4138  for (auto *Cat : Interface->known_categories()) {
4139  if (Cat->getDeclName())
4140  NameCategoryMap[Cat->getDeclName()] = Cat;
4141 
4142  // Keep track of the tail of the category list.
4143  Tail = Cat;
4144  }
4145  }
4146 
4147  bool operator()(ModuleFile &M) {
4148  // If we've loaded all of the category information we care about from
4149  // this module file, we're done.
4150  if (M.Generation <= PreviousGeneration)
4151  return true;
4152 
4153  // Map global ID of the definition down to the local ID used in this
4154  // module file. If there is no such mapping, we'll find nothing here
4155  // (or in any module it imports).
4156  DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4157  if (!LocalID)
4158  return true;
4159 
4160  // Perform a binary search to find the local redeclarations for this
4161  // declaration (if any).
4162  const ObjCCategoriesInfo Compare = { LocalID, 0 };
4163  const ObjCCategoriesInfo *Result
4164  = std::lower_bound(M.ObjCCategoriesMap,
4166  Compare);
4167  if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4168  Result->DefinitionID != LocalID) {
4169  // We didn't find anything. If the class definition is in this module
4170  // file, then the module files it depends on cannot have any categories,
4171  // so suppress further lookup.
4172  return Reader.isDeclIDFromModule(InterfaceID, M);
4173  }
4174 
4175  // We found something. Dig out all of the categories.
4176  unsigned Offset = Result->Offset;
4177  unsigned N = M.ObjCCategories[Offset];
4178  M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4179  for (unsigned I = 0; I != N; ++I)
4180  add(cast_or_null<ObjCCategoryDecl>(
4181  Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4182  return true;
4183  }
4184  };
4185 
4186 } // namespace
4187 
4188 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4189  ObjCInterfaceDecl *D,
4190  unsigned PreviousGeneration) {
4191  ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4192  PreviousGeneration);
4193  ModuleMgr.visit(Visitor);
4194 }
4195 
4196 template<typename DeclT, typename Fn>
4197 static void forAllLaterRedecls(DeclT *D, Fn F) {
4198  F(D);
4199 
4200  // Check whether we've already merged D into its redeclaration chain.
4201  // MostRecent may or may not be nullptr if D has not been merged. If
4202  // not, walk the merged redecl chain and see if it's there.
4203  auto *MostRecent = D->getMostRecentDecl();
4204  bool Found = false;
4205  for (auto *Redecl = MostRecent; Redecl && !Found;
4206  Redecl = Redecl->getPreviousDecl())
4207  Found = (Redecl == D);
4208 
4209  // If this declaration is merged, apply the functor to all later decls.
4210  if (Found) {
4211  for (auto *Redecl = MostRecent; Redecl != D;
4212  Redecl = Redecl->getPreviousDecl())
4213  F(Redecl);
4214  }
4215 }
4216 
4218  llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4219  while (Record.getIdx() < Record.size()) {
4220  switch ((DeclUpdateKind)Record.readInt()) {
4222  auto *RD = cast<CXXRecordDecl>(D);
4223  // FIXME: If we also have an update record for instantiating the
4224  // definition of D, we need that to happen before we get here.
4225  Decl *MD = Record.readDecl();
4226  assert(MD && "couldn't read decl from update record");
4227  // FIXME: We should call addHiddenDecl instead, to add the member
4228  // to its DeclContext.
4229  RD->addedMember(MD);
4230  break;
4231  }
4232 
4234  // It will be added to the template's lazy specialization set.
4235  PendingLazySpecializationIDs.push_back(ReadDeclID());
4236  break;
4237 
4239  auto *Anon = ReadDeclAs<NamespaceDecl>();
4240 
4241  // Each module has its own anonymous namespace, which is disjoint from
4242  // any other module's anonymous namespaces, so don't attach the anonymous
4243  // namespace at all.
4244  if (!Record.isModule()) {
4245  if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4246  TU->setAnonymousNamespace(Anon);
4247  else
4248  cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4249  }
4250  break;
4251  }
4252 
4254  auto *VD = cast<VarDecl>(D);
4255  VD->NonParmVarDeclBits.IsInline = Record.readInt();
4256  VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4257  uint64_t Val = Record.readInt();
4258  if (Val && !VD->getInit()) {
4259  VD->setInit(Record.readExpr());
4260  if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4261  EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4262  Eval->CheckedICE = true;
4263  Eval->IsICE = Val == 3;
4264  }
4265  }
4266  break;
4267  }
4268 
4270  SourceLocation POI = Record.readSourceLocation();
4271  if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4272  VTSD->setPointOfInstantiation(POI);
4273  } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4274  VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4275  } else {
4276  auto *FD = cast<FunctionDecl>(D);
4277  if (auto *FTSInfo = FD->TemplateOrSpecialization
4278  .dyn_cast<FunctionTemplateSpecializationInfo *>())
4279  FTSInfo->setPointOfInstantiation(POI);
4280  else
4281  FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4282  ->setPointOfInstantiation(POI);
4283  }
4284  break;
4285  }
4286 
4288  auto *Param = cast<ParmVarDecl>(D);
4289 
4290  // We have to read the default argument regardless of whether we use it
4291  // so that hypothetical further update records aren't messed up.
4292  // TODO: Add a function to skip over the next expr record.
4293  auto *DefaultArg = Record.readExpr();
4294 
4295  // Only apply the update if the parameter still has an uninstantiated
4296  // default argument.
4297  if (Param->hasUninstantiatedDefaultArg())
4298  Param->setDefaultArg(DefaultArg);
4299  break;
4300  }
4301 
4303  auto *FD = cast<FieldDecl>(D);
4304  auto *DefaultInit = Record.readExpr();
4305 
4306  // Only apply the update if the field still has an uninstantiated
4307  // default member initializer.
4308  if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4309  if (DefaultInit)
4310  FD->setInClassInitializer(DefaultInit);
4311  else
4312  // Instantiation failed. We can get here if we serialized an AST for
4313  // an invalid program.
4314  FD->removeInClassInitializer();
4315  }
4316  break;
4317  }
4318 
4320  auto *FD = cast<FunctionDecl>(D);
4321  if (Reader.PendingBodies[FD]) {
4322  // FIXME: Maybe check for ODR violations.
4323  // It's safe to stop now because this update record is always last.
4324  return;
4325  }
4326 
4327  if (Record.readInt()) {
4328  // Maintain AST consistency: any later redeclarations of this function
4329  // are inline if this one is. (We might have merged another declaration
4330  // into this one.)
4331  forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4332  FD->setImplicitlyInline();
4333  });
4334  }
4335  FD->setInnerLocStart(ReadSourceLocation());
4336  ReadFunctionDefinition(FD);
4337  assert(Record.getIdx() == Record.size() && "lazy body must be last");
4338  break;
4339  }
4340 
4342  auto *RD = cast<CXXRecordDecl>(D);
4343  auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4344  bool HadRealDefinition =
4345  OldDD && (OldDD->Definition != RD ||
4346  !Reader.PendingFakeDefinitionData.count(OldDD));
4347  RD->setParamDestroyedInCallee(Record.readInt());
4348  RD->setArgPassingRestrictions(
4349  (RecordDecl::ArgPassingKind)Record.readInt());
4350  ReadCXXRecordDefinition(RD, /*Update*/true);
4351 
4352  // Visible update is handled separately.
4353  uint64_t LexicalOffset = ReadLocalOffset();
4354  if (!HadRealDefinition && LexicalOffset) {
4355  Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4356  Reader.PendingFakeDefinitionData.erase(OldDD);
4357  }
4358 
4359  auto TSK = (TemplateSpecializationKind)Record.readInt();
4360  SourceLocation POI = ReadSourceLocation();
4361  if (MemberSpecializationInfo *MSInfo =
4362  RD->getMemberSpecializationInfo()) {
4363  MSInfo->setTemplateSpecializationKind(TSK);
4364  MSInfo->setPointOfInstantiation(POI);
4365  } else {
4366  auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4367  Spec->setTemplateSpecializationKind(TSK);
4368  Spec->setPointOfInstantiation(POI);
4369 
4370  if (Record.readInt()) {
4371  auto *PartialSpec =
4372  ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4374  Record.readTemplateArgumentList(TemplArgs);
4375  auto *TemplArgList = TemplateArgumentList::CreateCopy(
4376  Reader.getContext(), TemplArgs);
4377 
4378  // FIXME: If we already have a partial specialization set,
4379  // check that it matches.
4380  if (!Spec->getSpecializedTemplateOrPartial()
4382  Spec->setInstantiationOf(PartialSpec, TemplArgList);
4383  }
4384  }
4385 
4386  RD->setTagKind((TagTypeKind)Record.readInt());
4387  RD->setLocation(ReadSourceLocation());
4388  RD->setLocStart(ReadSourceLocation());
4389  RD->setBraceRange(ReadSourceRange());
4390 
4391  if (Record.readInt()) {
4392  AttrVec Attrs;
4393  Record.readAttributes(Attrs);
4394  // If the declaration already has attributes, we assume that some other
4395  // AST file already loaded them.
4396  if (!D->hasAttrs())
4397  D->setAttrsImpl(Attrs, Reader.getContext());
4398  }
4399  break;
4400  }
4401 
4403  // Set the 'operator delete' directly to avoid emitting another update
4404  // record.
4405  auto *Del = ReadDeclAs<FunctionDecl>();
4406  auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4407  auto *ThisArg = Record.readExpr();
4408  // FIXME: Check consistency if we have an old and new operator delete.
4409  if (!First->OperatorDelete) {
4410  First->OperatorDelete = Del;
4411  First->OperatorDeleteThisArg = ThisArg;
4412  }
4413  break;
4414  }
4415 
4418  SmallVector<QualType, 8> ExceptionStorage;
4419  Record.readExceptionSpec(ExceptionStorage, ESI);
4420 
4421  // Update this declaration's exception specification, if needed.
4422  auto *FD = cast<FunctionDecl>(D);
4423  auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4424  // FIXME: If the exception specification is already present, check that it
4425  // matches.
4426  if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4427  FD->setType(Reader.getContext().getFunctionType(
4428  FPT->getReturnType(), FPT->getParamTypes(),
4429  FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4430 
4431  // When we get to the end of deserializing, see if there are other decls
4432  // that we need to propagate this exception specification onto.
4433  Reader.PendingExceptionSpecUpdates.insert(
4434  std::make_pair(FD->getCanonicalDecl(), FD));
4435  }
4436  break;
4437  }
4438 
4440  auto *FD = cast<FunctionDecl>(D);
4441  QualType DeducedResultType = Record.readType();
4442  Reader.PendingDeducedTypeUpdates.insert(
4443  {FD->getCanonicalDecl(), DeducedResultType});
4444  break;
4445  }
4446 
4447  case UPD_DECL_MARKED_USED:
4448  // Maintain AST consistency: any later redeclarations are used too.
4449  D->markUsed(Reader.getContext());
4450  break;
4451 
4452  case UPD_MANGLING_NUMBER:
4453  Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4454  Record.readInt());
4455  break;
4456 
4458  Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4459  Record.readInt());
4460  break;
4461 
4463  D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4464  ReadSourceRange()));
4465  break;
4466 
4467  case UPD_DECL_EXPORTED: {
4468  unsigned SubmoduleID = readSubmoduleID();
4469  auto *Exported = cast<NamedDecl>(D);
4470  Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4471  Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4472  Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4473  break;
4474  }
4475 
4477  D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4478  Reader.getContext(),
4479  static_cast<OMPDeclareTargetDeclAttr::MapTypeTy>(Record.readInt()),
4480  ReadSourceRange()));
4481  break;
4482 
4484  AttrVec Attrs;
4485  Record.readAttributes(Attrs);
4486  assert(Attrs.size() == 1);
4487  D->addAttr(Attrs[0]);
4488  break;
4489  }
4490  }
4491 }
const uint64_t & readInt()
Returns the current value in this record, and advances to the next value.
Definition: ASTReader.h:2400
RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD)
void VisitTypeDecl(TypeDecl *TD)
void setCategoryNameLoc(SourceLocation Loc)
Definition: DeclObjC.h:2413
A FriendTemplateDecl record.
Definition: ASTBitCodes.h:1457
void setHasSkippedBody(bool Skipped=true)
Definition: Decl.h:2215
Defines the clang::ASTContext interface.
A NonTypeTemplateParmDecl record.
Definition: ASTBitCodes.h:1484
static bool isUndeducedReturnType(QualType T)
void setScopeInfo(unsigned scopeDepth, unsigned parameterIndex)
Definition: Decl.h:1582
Decl * GetLocalDecl(ModuleFile &F, uint32_t LocalID)
Reads a declaration with the given local ID in the given module.
Definition: ASTReader.h:1841
SourceLocation readSourceLocation()
Read a source location, advancing Idx.
Definition: ASTReader.h:2597
void VisitClassScopeFunctionSpecializationDecl(ClassScopeFunctionSpecializationDecl *D)
static const Decl * getCanonicalDecl(const Decl *D)
void setImplicit(bool I=true)
Definition: DeclBase.h:550
Represents a function declaration or definition.
Definition: Decl.h:1737
void setInitializerData(Expr *OrigE, Expr *PrivE)
Set initializer Orig and Priv vars.
Definition: DeclOpenMP.h:188
void setNonTrivialToPrimitiveDestroy(bool V)
Definition: Decl.h:3711
void VisitVarDecl(VarDecl *VD)
#define MATCH_FIELD(Field)
void setAnonymousStructOrUnion(bool Anon)
Definition: Decl.h:3669
A class which contains all the information about a particular captured value.
Definition: Decl.h:3863
static ImportDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumLocations)
Create a new, deserialized module import declaration.
Definition: Decl.cpp:4678
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
void VisitImportDecl(ImportDecl *D)
A (possibly-)qualified type.
Definition: Type.h:634
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
FunctionDecl * Function
The function template specialization that this structure describes.
Definition: DeclTemplate.h:529
Static storage duration.
Definition: Specifiers.h:280
void setDefaultArgument(TypeSourceInfo *DefArg)
Set the default argument for this template parameter.
void setCompleteDefinition(bool V=true)
True if this decl has its body fully specified.
Definition: Decl.h:3171
void VisitUsingDecl(UsingDecl *D)
static UnresolvedUsingValueDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2810
static VarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:1924
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:1520
void setNonTrivialToPrimitiveDefaultInitialize(bool V)
Definition: Decl.h:3695
void VisitObjCIvarDecl(ObjCIvarDecl *D)
#define OR_FIELD(Field)
void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D)
void setExplicitSpecified(bool ExpSpec=true)
State that this function is marked as explicit explicitly.
Definition: Decl.h:2363
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3360
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:2785
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:3198
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:3017
C Language Family Type Representation.
void setParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4094
Microsoft&#39;s &#39;__super&#39; specifier, stored as a CXXRecordDecl* of the class it appeared in...
An OMPDeclareReductionDecl record.
Definition: ASTBitCodes.h:1544
void VisitEnumConstantDecl(EnumConstantDecl *ECD)
static PragmaCommentDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned ArgSize)
Definition: Decl.cpp:4332
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:8461
Defines the clang::Module class, which describes a module in the source code.
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
static NamedDecl * getDeclForMerging(NamedDecl *Found, bool IsTypedefNameForLinkage)
Find the declaration that should be merged into, given the declaration found by name lookup...
A VarTemplatePartialSpecializationDecl record.
Definition: ASTBitCodes.h:1475
void setArgPassingRestrictions(ArgPassingKind Kind)
Definition: Decl.h:3726
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:452
void setPure(bool P=true)
Definition: Decl.cpp:2746
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:1382
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:4258
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:4270
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:2817
Declaration of a variable template.
Represent a C++ namespace.
Definition: Decl.h:514
A ObjCPropertyDecl record.
Definition: ASTBitCodes.h:1339
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:97
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:2543
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:1523
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2491
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:4465
QualType getElementType() const
Definition: Type.h:2852
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3168
Represents a #pragma comment line.
Definition: Decl.h:139
A ClassTemplateDecl record.
Definition: ASTBitCodes.h:1460
void VisitStaticAssertDecl(StaticAssertDecl *D)
A PragmaDetectMismatchDecl record.
Definition: ASTBitCodes.h:1538
An UnresolvedUsingTypenameDecl record.
Definition: ASTBitCodes.h:1421
An identifier, stored as an IdentifierInfo*.
void setNothrow(bool Nothrow=true)
Definition: Decl.cpp:4475
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:4079
Represents a variable declaration or definition.
Definition: Decl.h:812
void VisitNamedDecl(NamedDecl *ND)
Declaration of a redeclarable template.
Definition: DeclTemplate.h:736
An OMPCapturedExprDecl record.
Definition: ASTBitCodes.h:1532
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6761
A UsingShadowDecl record.
Definition: ASTBitCodes.h:1409
const unsigned int NUM_PREDEF_DECL_IDS
The number of declaration IDs that are predefined.
Definition: ASTBitCodes.h:1276
The "__interface" keyword.
Definition: Type.h:5041
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:1510
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:1487
Represents a parameter to a function.
Definition: Decl.h:1549
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:140
A ObjCInterfaceDecl record.
Definition: ASTBitCodes.h:1315
Module * getSubmodule(serialization::SubmoduleID GlobalID)
Retrieve the submodule that corresponds to a global submodule ID.
Definition: ASTReader.h:2415
Represents the builtin template declaration which is used to implement __make_integer_seq and other b...
RedeclarableResult VisitTagDecl(TagDecl *TD)
iterator begin(DeclarationName Name)
begin - Returns an iterator for decls with the name &#39;Name&#39;.
static void attachPreviousDeclImpl(ASTReader &Reader, Redeclarable< DeclT > *D, Decl *Previous, Decl *Canon)
Types, declared with &#39;struct foo&#39;, typedefs, etc.
Definition: DeclBase.h:130
A CXXConstructorDecl record for an inherited constructor.
Definition: ASTBitCodes.h:1442
Represents a struct/union/class.
Definition: Decl.h:3592
Description of a constructor that was inherited from a base class.
Definition: DeclCXX.h:2465
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:3488
T * readDeclAs()
Reads a declaration from the given position in the record, advancing Idx.
Definition: ASTReader.h:2519
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:2609
static IndirectFieldDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4511
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:1189
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:2872
LambdaCaptureKind
The different capture forms in a lambda introducer.
Definition: Lambda.h:33
Represents a member of a struct/union/class.
Definition: Decl.h:2578
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:775
ArgPassingKind
Enum that represents the different ways arguments are passed to and returned from function calls...
Definition: Decl.h:3601
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:2134
Helper class that saves the current stream position and then restores it when destroyed.
Definition: ASTReader.h:2663
static NamespaceDecl * getNamespace(const NestedNameSpecifier *X)
void setOwningModuleID(unsigned ID)
Set the owning module ID.
Definition: DeclBase.h:625
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:326
void Profile(llvm::FoldingSetNodeID &ID)
Definition: DeclTemplate.h:590
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:131
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:2858
TypeSourceInfo * getTypeSourceInfo()
Reads a declarator info from the given record, advancing Idx.
Definition: ASTReader.h:2481
void VisitLabelDecl(LabelDecl *LD)
static NamespaceDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2607
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:1502
size_t size() const
The length of this record.
Definition: ASTReader.h:2390
static OMPCapturedExprDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclOpenMP.cpp:198
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:9096
Provides information about a function template specialization, which is a FunctionDecl that has been ...
Definition: DeclTemplate.h:507
Represents a C++ using-declaration.
Definition: DeclCXX.h:3359
void setUsingLoc(SourceLocation L)
Set the source location of the &#39;using&#39; keyword.
Definition: DeclCXX.h:3395
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:6760
< 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:1451
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:3734
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
A ConstructorUsingShadowDecl record.
Definition: ASTBitCodes.h:1412
A UsingDirecitveDecl record.
Definition: ASTBitCodes.h:1415
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:2840
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:1360
Represents a declaration of a type.
Definition: Decl.h:2873
void setHasObjectMember(bool val)
Definition: Decl.h:3674
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:2306
void setHasImplicitReturnZero(bool IRZ)
State that falling off this function implicitly returns null/zero.
Definition: Decl.h:2058
MemberSpecializationInfo * getMemberSpecializationInfo() const
If this enumeration is an instantiation of a member enumeration of a class template specialization...
Definition: Decl.h:3573
DeclID VisitTemplateDecl(TemplateDecl *D)
SourceRange readSourceRange()
Read a source range, advancing Idx.
Definition: ASTReader.h:2602
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:115
CXXRecordDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:727
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1160
static FileScopeAsmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4613
void VisitCXXMethodDecl(CXXMethodDecl *D)
void setTrivial(bool IT)
Definition: Decl.h:2026
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:4583
A ClassTemplateSpecializationDecl record.
Definition: ASTBitCodes.h:1463
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:823
static bool isSameEntity(NamedDecl *X, NamedDecl *Y)
Determine whether the two declarations refer to the same entity.
static FunctionTemplateSpecializationInfo * Create(ASTContext &C, FunctionDecl *FD, FunctionTemplateDecl *Template, TemplateSpecializationKind TSK, const TemplateArgumentList *TemplateArgs, const TemplateArgumentListInfo *TemplateArgsAsWritten, SourceLocation POI)
Represents the body of a CapturedStmt, and serves as its DeclContext.
Definition: Decl.h:4043
Represents an ObjC class declaration.
Definition: DeclObjC.h:1171
Represents a linkage specification.
Definition: DeclCXX.h:2833
static ParmVarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:2551
void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D)
CXXRecordDecl * getTemplatedDecl() const
Get the underlying class declarations of the template.
A binding in a decomposition declaration.
Definition: DeclCXX.h:3802
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:3338
void setInitVal(const llvm::APSInt &V)
Definition: Decl.h:2809
Ordinary names.
Definition: DeclBase.h:144
void setInitExpr(Expr *E)
Definition: Decl.h:2808
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:398
void setLocStart(SourceLocation L)
Definition: Decl.h:2901
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:872
void setHasInheritedPrototype(bool P=true)
State that this function inherited its prototype from a previous declaration.
Definition: Decl.h:2088
static std::string ReadString(const RecordData &Record, unsigned &Idx)
Definition: ASTReader.cpp:9082
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:1598
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:1873
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:2046
llvm::FoldingSetVector< FunctionTemplateSpecializationInfo > Specializations
The function template specializations for this function template, including explicit specializations ...
Definition: DeclTemplate.h:977
void setVariadic(bool isVar)
Definition: DeclObjC.h:427
static TemplateTypeParmDecl * CreateDeserialized(const ASTContext &C, unsigned ID)
bool hasAttr() const
Definition: DeclBase.h:533
Represents the declaration of a typedef-name via a C++11 alias-declaration.
Definition: Decl.h:3037
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1635
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3692
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:2350
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:2753
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:688
A CXXDeductionGuideDecl record.
Definition: ASTBitCodes.h:1433
void VisitParmVarDecl(ParmVarDecl *PD)
void setStorageClass(StorageClass SClass)
Sets the storage class as written in the source.
Definition: Decl.h:2335
void VisitLinkageSpecDecl(LinkageSpecDecl *D)
static OMPRequiresDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned N)
Create deserialized requires node.
Definition: DeclOpenMP.cpp:72
void setIvarRBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2696
A StaticAssertDecl record.
Definition: ASTBitCodes.h:1493
for(unsigned I=0, E=TL.getNumArgs();I !=E;++I)
A VarTemplateSpecializationDecl record.
Definition: ASTBitCodes.h:1472
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:1630
An ObjCTypeParamDecl record.
Definition: ASTBitCodes.h:1529
void VisitDecl(Decl *D)
A record containing CXXBaseSpecifiers.
Definition: ASTBitCodes.h:1496
DiagnosticBuilder Diag(unsigned DiagID) const
Report a diagnostic.
Definition: ASTReader.cpp:9115
void setTrivialForCall(bool IT)
Definition: Decl.h:2029
void setType(QualType T, TypeSourceInfo *TSI)
Definition: DeclObjC.h:830
TemplateParameterList * getTemplateParameters() const
Get the list of template parameters.
Definition: DeclTemplate.h:431
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:878
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:3247
Represents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3857
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:1330
Defines the clang::LangOptions interface.
void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD)
void setBitWidth(Expr *Width)
Set the bit-field width for this member.
Definition: Decl.h:2680
static LinkageSpecDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2552
A ObjCPropertyImplDecl record.
Definition: ASTBitCodes.h:1342
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:6824
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2713
const internal::VariadicAllOfMatcher< Decl > decl
Matches declarations.
void setInit(Expr *I)
Definition: Decl.cpp:2204
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:131
A CXXConstructorDecl record.
Definition: ASTBitCodes.h:1439
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:724
void setContextParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4112
void setAtEndRange(SourceRange atEnd)
Definition: DeclObjC.h:1123
void setRBraceLoc(SourceLocation L)
Definition: DeclCXX.h:2884
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:429
SourceRange ReadSourceRange(ModuleFile &F, const RecordData &Record, unsigned &Idx)
Read a source range.
Definition: ASTReader.cpp:9052
A record containing CXXCtorInitializers.
Definition: ASTBitCodes.h:1499
A VarTemplateDecl record.
Definition: ASTBitCodes.h:1469
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:884
Decl * readDecl()
Reads a declaration from the given position in a record in the given module, advancing Idx...
Definition: ASTReader.h:2509
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:2425
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 setCompleteDefinitionRequired(bool V=true)
True if this complete decl is required to be complete for some existing use.
Definition: Decl.h:3183
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:2017
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:2182
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:2396
A CXXDestructorDecl record.
Definition: ASTBitCodes.h:1445
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:1506
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
static NamespaceAliasDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2669
static CXXConstructorDecl * CreateDeserialized(ASTContext &C, unsigned ID, bool InheritsConstructor)
Definition: DeclCXX.cpp:2329
bool isFunctionOrMethod() const
Definition: DeclBase.h:1803
StorageClass
Storage classes.
Definition: Specifiers.h:205
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:1400
void setTypename(bool TN)
Sets whether the using declaration has &#39;typename&#39;.
Definition: DeclCXX.h:3417
Declaration of an alias template.
void setModedTypeSourceInfo(TypeSourceInfo *unmodedTSI, QualType modedTy)
Definition: Decl.h:2981
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:1379
void setLocation(SourceLocation L)
Definition: DeclBase.h:421
TemplateTemplateParmDecl - Declares a template template parameter, e.g., "T" in.
void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D)
An ImplicitParamDecl record.
Definition: ASTBitCodes.h:1354
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:1995
Represents a C++ conversion function within a class.
Definition: DeclCXX.h:2775
static UsingDirectiveDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2573
An EnumConstantDecl record.
Definition: ASTBitCodes.h:1306
static ObjCTypeParamDecl * CreateDeserialized(ASTContext &ctx, unsigned ID)
Definition: DeclObjC.cpp:1400
std::string readString()
Read a string, advancing Idx.
Definition: ASTReader.h:2622
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:699
void VisitNamespaceAliasDecl(NamespaceAliasDecl *D)
void setHasSkippedBody(bool Skipped=true)
Definition: DeclObjC.h:465
An ImportDecl recording a module import.
Definition: ASTBitCodes.h:1517
A ObjCCategoryDecl record.
Definition: ASTBitCodes.h:1327
void setDoesNotEscape(bool B=true)
Definition: Decl.h:4009
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
void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D)
void VisitObjCProtocolDecl(ObjCProtocolDecl *D)
A ObjCCompatibleAliasDecl record.
Definition: ASTBitCodes.h:1336
void setHasExternalVisibleStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:2333
Attr * ReadAttr(ModuleFile &M, const RecordData &Record, unsigned &Idx)
Reads one attribute from the current stream position.
bool hasAttrs() const
Definition: DeclBase.h:475
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:3780
static TypeAliasTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty alias template node.
unsigned readRecord(llvm::BitstreamCursor &Cursor, unsigned AbbrevID)
Reads a record with id AbbrevID from Cursor, resetting the internal state.
void setIsVariadic(bool value)
Definition: Decl.h:3933
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:4358
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:4213
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:4004
void setColonLoc(SourceLocation CLoc)
Sets the location of the colon.
Definition: DeclCXX.h:156
An UnresolvedUsingValueDecl record.
Definition: ASTBitCodes.h:1418
The "struct" keyword.
Definition: Type.h:5038
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:4485
Kind
static UsingShadowDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2693
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:2473
Encodes a location in the source.
static EmptyDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4625
QualType getReturnType() const
Definition: Type.h:3618
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:588
static TemplateTemplateParmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:786
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:1391
Pseudo declaration for capturing expressions.
Definition: DeclOpenMP.h:312
void setIvarLBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2415
void setBraceRange(SourceRange R)
Definition: Decl.h:3145
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:3206
void setObjCDeclQualifier(ObjCDeclQualifier QV)
Definition: DeclObjC.h:250
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3063
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:375
static DecompositionDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumBindings)
Definition: DeclCXX.cpp:2901
Defines several types used to describe C++ lambda expressions that are shared between the parser and ...
void setReferenced(bool R=true)
Definition: DeclBase.h:579
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:3578
void setPosition(unsigned P)
void setIsCopyDeductionCandidate(bool isCDC=true)
Definition: DeclCXX.h:2031
void VisitObjCImplDecl(ObjCImplDecl *D)
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2048
void setDefaulted(bool D=true)
Definition: Decl.h:2034
void setHasFlexibleArrayMember(bool V)
Definition: Decl.h:3650
EnumDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.h:3404
Represents a C++ nested name specifier, such as "\::std::vector<int>::".
void VisitBindingDecl(BindingDecl *BD)
A TemplateTypeParmDecl record.
Definition: ASTBitCodes.h:1481
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.
Definition: DeclTemplate.h:974
const ArrayType * getAsArrayType(QualType T) const
Type Query functions.
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2279
QualType getInjectedClassNameSpecialization()
Retrieve the template specialization type of the injected-class-name for this class template...
void readDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name)
Definition: ASTReader.h:2536
void addDecl(NamedDecl *D)
Definition: UnresolvedSet.h:88
void setDeclName(DeclarationName N)
Set the name of this declaration.
Definition: Decl.h:300
static MSPropertyDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2939
SourceLocation getLocation() const
Definition: ASTBitCodes.h:235
void setOverriding(bool IsOver)
Definition: DeclObjC.h:450
static ConstructorUsingShadowDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2716
Describes the categories of an Objective-C class.
Definition: ASTBitCodes.h:2038
bool isDeclIDFromModule(serialization::GlobalDeclID ID, ModuleFile &M) const
Returns true if global DeclID ID originated from module M.
Definition: ASTReader.cpp:7223
void init(NamedDecl *templatedDecl, TemplateParameterList *templateParams)
Initialize the underlying templated declaration and template parameters.
Definition: DeclTemplate.h:496
void setTagKind(TagKind TK)
Definition: Decl.h:3246
unsigned getIdx() const
The current position in this record.
Definition: ASTReader.h:2387
CommonBase * Common
Pointer to the common data shared by all declarations of this template.
Definition: DeclTemplate.h:825
static FunctionDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4441
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:728
void setProtocolList(ObjCProtocolDecl *const *List, unsigned Num, const SourceLocation *Locs, ASTContext &C)
setProtocolList - Set the list of protocols that this interface implements.
Definition: DeclObjC.h:2343
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:697
uint32_t TypeID
An ID number that refers to a type in an AST file.
Definition: ASTBitCodes.h:85
void setInitializer(Expr *E, InitKind IK)
Set initializer expression for the declare reduction construct.
Definition: DeclOpenMP.h:183
void setMapperVarRef(Expr *MapperVarRefE)
Set the variable declared in the mapper.
Definition: DeclOpenMP.h:285
A simple visitor class that helps create declaration visitors.
Definition: DeclVisitor.h:66
const unsigned int DECL_UPDATES
Record of updates for a declaration that was modified after being deserialized.
Definition: ASTBitCodes.h:1280
void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D)
void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D)
void VisitRecordDecl(RecordDecl *RD)
static T assert_cast(T t)
"Cast" to type T, asserting if we don&#39;t have an implicit conversion.
serialization::SubmoduleID getGlobalSubmoduleID(unsigned LocalID)
Retrieve the global submodule ID its local ID number.
Definition: ASTReader.h:2410
An OMPDeclareMapperDecl record.
Definition: ASTBitCodes.h:1541
static VarTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty variable template node.
A NamespaceDecl record.
Definition: ASTBitCodes.h:1397
Represents a C++11 static_assert declaration.
Definition: DeclCXX.h:3753
__DEVICE__ void * memcpy(void *__a, const void *__b, size_t __c)
uint32_t BitOffset
Offset in the AST file.
Definition: ASTBitCodes.h:225
void setExplicitlyDefaulted(bool ED=true)
State that this function is explicitly defaulted per C++0x.
Definition: Decl.h:2044
void setLAngleLoc(SourceLocation Loc)
Definition: TemplateBase.h:573
void VisitExportDecl(ExportDecl *D)
void addArgument(const TemplateArgumentLoc &Loc)
Definition: TemplateBase.h:594
File is a PCH file treated as the actual main file.
Definition: Module.h:56
ExceptionSpecificationType getExceptionSpecType() const