clang  9.0.0svn
ASTReaderDecl.cpp
Go to the documentation of this file.
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 VisitOMPAllocateDecl(OMPAllocateDecl *D);
448  void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
449  void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
450  void VisitOMPRequiresDecl(OMPRequiresDecl *D);
451  void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
452  };
453 
454 } // namespace clang
455 
456 namespace {
457 
458 /// Iterator over the redeclarations of a declaration that have already
459 /// been merged into the same redeclaration chain.
460 template<typename DeclT>
461 class MergedRedeclIterator {
462  DeclT *Start;
463  DeclT *Canonical = nullptr;
464  DeclT *Current = nullptr;
465 
466 public:
467  MergedRedeclIterator() = default;
468  MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
469 
470  DeclT *operator*() { return Current; }
471 
472  MergedRedeclIterator &operator++() {
473  if (Current->isFirstDecl()) {
474  Canonical = Current;
475  Current = Current->getMostRecentDecl();
476  } else
477  Current = Current->getPreviousDecl();
478 
479  // If we started in the merged portion, we'll reach our start position
480  // eventually. Otherwise, we'll never reach it, but the second declaration
481  // we reached was the canonical declaration, so stop when we see that one
482  // again.
483  if (Current == Start || Current == Canonical)
484  Current = nullptr;
485  return *this;
486  }
487 
488  friend bool operator!=(const MergedRedeclIterator &A,
489  const MergedRedeclIterator &B) {
490  return A.Current != B.Current;
491  }
492 };
493 
494 } // namespace
495 
496 template <typename DeclT>
497 static llvm::iterator_range<MergedRedeclIterator<DeclT>>
498 merged_redecls(DeclT *D) {
499  return llvm::make_range(MergedRedeclIterator<DeclT>(D),
500  MergedRedeclIterator<DeclT>());
501 }
502 
503 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
504  return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
505 }
506 
508  if (Record.readInt())
509  Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
510  if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
511  CD->setNumCtorInitializers(Record.readInt());
512  if (CD->getNumCtorInitializers())
513  CD->CtorInitializers = ReadGlobalOffset();
514  }
515  // Store the offset of the body so we can lazily load it later.
516  Reader.PendingBodies[FD] = GetCurrentCursorOffset();
517  HasPendingBody = true;
518 }
519 
522 
523  // At this point we have deserialized and merged the decl and it is safe to
524  // update its canonical decl to signal that the entire entity is used.
525  D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
526  IsDeclMarkedUsed = false;
527 
528  if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
529  if (auto *TInfo = DD->getTypeSourceInfo())
530  Record.readTypeLoc(TInfo->getTypeLoc());
531  }
532 
533  if (auto *TD = dyn_cast<TypeDecl>(D)) {
534  // We have a fully initialized TypeDecl. Read its type now.
535  TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
536 
537  // If this is a tag declaration with a typedef name for linkage, it's safe
538  // to load that typedef now.
539  if (NamedDeclForTagDecl)
540  cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
541  cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
542  } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
543  // if we have a fully initialized TypeDecl, we can safely read its type now.
544  ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
545  } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
546  // FunctionDecl's body was written last after all other Stmts/Exprs.
547  // We only read it if FD doesn't already have a body (e.g., from another
548  // module).
549  // FIXME: Can we diagnose ODR violations somehow?
550  if (Record.readInt())
551  ReadFunctionDefinition(FD);
552  }
553 }
554 
556  if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
557  isa<ParmVarDecl>(D)) {
558  // We don't want to deserialize the DeclContext of a template
559  // parameter or of a parameter of a function template immediately. These
560  // entities might be used in the formulation of its DeclContext (for
561  // example, a function parameter can be used in decltype() in trailing
562  // return type of the function). Use the translation unit DeclContext as a
563  // placeholder.
564  GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID();
565  GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID();
566  if (!LexicalDCIDForTemplateParmDecl)
567  LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
568  Reader.addPendingDeclContextInfo(D,
569  SemaDCIDForTemplateParmDecl,
570  LexicalDCIDForTemplateParmDecl);
571  D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
572  } else {
573  auto *SemaDC = ReadDeclAs<DeclContext>();
574  auto *LexicalDC = ReadDeclAs<DeclContext>();
575  if (!LexicalDC)
576  LexicalDC = SemaDC;
577  DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
578  // Avoid calling setLexicalDeclContext() directly because it uses
579  // Decl::getASTContext() internally which is unsafe during derialization.
580  D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
581  Reader.getContext());
582  }
583  D->setLocation(ThisDeclLoc);
584  D->setInvalidDecl(Record.readInt());
585  if (Record.readInt()) { // hasAttrs
586  AttrVec Attrs;
587  Record.readAttributes(Attrs);
588  // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
589  // internally which is unsafe during derialization.
590  D->setAttrsImpl(Attrs, Reader.getContext());
591  }
592  D->setImplicit(Record.readInt());
593  D->Used = Record.readInt();
594  IsDeclMarkedUsed |= D->Used;
595  D->setReferenced(Record.readInt());
596  D->setTopLevelDeclInObjCContainer(Record.readInt());
597  D->setAccess((AccessSpecifier)Record.readInt());
598  D->FromASTFile = true;
599  bool ModulePrivate = Record.readInt();
600 
601  // Determine whether this declaration is part of a (sub)module. If so, it
602  // may not yet be visible.
603  if (unsigned SubmoduleID = readSubmoduleID()) {
604  // Store the owning submodule ID in the declaration.
609 
610  if (ModulePrivate) {
611  // Module-private declarations are never visible, so there is no work to
612  // do.
613  } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
614  // If local visibility is being tracked, this declaration will become
615  // hidden and visible as the owning module does.
616  } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
617  // Mark the declaration as visible when its owning module becomes visible.
618  if (Owner->NameVisibility == Module::AllVisible)
620  else
621  Reader.HiddenNamesMap[Owner].push_back(D);
622  }
623  } else if (ModulePrivate) {
625  }
626 }
627 
629  VisitDecl(D);
630  D->setLocation(ReadSourceLocation());
631  D->CommentKind = (PragmaMSCommentKind)Record.readInt();
632  std::string Arg = ReadString();
633  memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
634  D->getTrailingObjects<char>()[Arg.size()] = '\0';
635 }
636 
638  VisitDecl(D);
639  D->setLocation(ReadSourceLocation());
640  std::string Name = ReadString();
641  memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
642  D->getTrailingObjects<char>()[Name.size()] = '\0';
643 
644  D->ValueStart = Name.size() + 1;
645  std::string Value = ReadString();
646  memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
647  Value.size());
648  D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
649 }
650 
652  llvm_unreachable("Translation units are not serialized");
653 }
654 
656  VisitDecl(ND);
657  ND->setDeclName(Record.readDeclarationName());
658  AnonymousDeclNumber = Record.readInt();
659 }
660 
662  VisitNamedDecl(TD);
663  TD->setLocStart(ReadSourceLocation());
664  // Delay type reading until after we have fully initialized the decl.
665  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
666 }
667 
668 ASTDeclReader::RedeclarableResult
670  RedeclarableResult Redecl = VisitRedeclarable(TD);
671  VisitTypeDecl(TD);
672  TypeSourceInfo *TInfo = GetTypeSourceInfo();
673  if (Record.readInt()) { // isModed
674  QualType modedT = Record.readType();
675  TD->setModedTypeSourceInfo(TInfo, modedT);
676  } else
677  TD->setTypeSourceInfo(TInfo);
678  // Read and discard the declaration for which this is a typedef name for
679  // linkage, if it exists. We cannot rely on our type to pull in this decl,
680  // because it might have been merged with a type from another module and
681  // thus might not refer to our version of the declaration.
682  ReadDecl();
683  return Redecl;
684 }
685 
687  RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
688  mergeRedeclarable(TD, Redecl);
689 }
690 
692  RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
693  if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>())
694  // Merged when we merge the template.
695  TD->setDescribedAliasTemplate(Template);
696  else
697  mergeRedeclarable(TD, Redecl);
698 }
699 
700 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
701  RedeclarableResult Redecl = VisitRedeclarable(TD);
702  VisitTypeDecl(TD);
703 
704  TD->IdentifierNamespace = Record.readInt();
705  TD->setTagKind((TagDecl::TagKind)Record.readInt());
706  if (!isa<CXXRecordDecl>(TD))
707  TD->setCompleteDefinition(Record.readInt());
708  TD->setEmbeddedInDeclarator(Record.readInt());
709  TD->setFreeStanding(Record.readInt());
710  TD->setCompleteDefinitionRequired(Record.readInt());
711  TD->setBraceRange(ReadSourceRange());
712 
713  switch (Record.readInt()) {
714  case 0:
715  break;
716  case 1: { // ExtInfo
717  auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
718  ReadQualifierInfo(*Info);
719  TD->TypedefNameDeclOrQualifier = Info;
720  break;
721  }
722  case 2: // TypedefNameForAnonDecl
723  NamedDeclForTagDecl = ReadDeclID();
724  TypedefNameForLinkage = Record.getIdentifierInfo();
725  break;
726  default:
727  llvm_unreachable("unexpected tag info kind");
728  }
729 
730  if (!isa<CXXRecordDecl>(TD))
731  mergeRedeclarable(TD, Redecl);
732  return Redecl;
733 }
734 
736  VisitTagDecl(ED);
737  if (TypeSourceInfo *TI = GetTypeSourceInfo())
738  ED->setIntegerTypeSourceInfo(TI);
739  else
740  ED->setIntegerType(Record.readType());
741  ED->setPromotionType(Record.readType());
742  ED->setNumPositiveBits(Record.readInt());
743  ED->setNumNegativeBits(Record.readInt());
744  ED->setScoped(Record.readInt());
745  ED->setScopedUsingClassTag(Record.readInt());
746  ED->setFixed(Record.readInt());
747 
748  ED->setHasODRHash(true);
749  ED->ODRHash = Record.readInt();
750 
751  // If this is a definition subject to the ODR, and we already have a
752  // definition, merge this one into it.
753  if (ED->isCompleteDefinition() &&
754  Reader.getContext().getLangOpts().Modules &&
755  Reader.getContext().getLangOpts().CPlusPlus) {
756  EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
757  if (!OldDef) {
758  // This is the first time we've seen an imported definition. Look for a
759  // local definition before deciding that we are the first definition.
760  for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
761  if (!D->isFromASTFile() && D->isCompleteDefinition()) {
762  OldDef = D;
763  break;
764  }
765  }
766  }
767  if (OldDef) {
768  Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
769  ED->setCompleteDefinition(false);
770  Reader.mergeDefinitionVisibility(OldDef, ED);
771  if (OldDef->getODRHash() != ED->getODRHash())
772  Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
773  } else {
774  OldDef = ED;
775  }
776  }
777 
778  if (auto *InstED = ReadDeclAs<EnumDecl>()) {
779  auto TSK = (TemplateSpecializationKind)Record.readInt();
780  SourceLocation POI = ReadSourceLocation();
781  ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
783  }
784 }
785 
786 ASTDeclReader::RedeclarableResult
788  RedeclarableResult Redecl = VisitTagDecl(RD);
789  RD->setHasFlexibleArrayMember(Record.readInt());
790  RD->setAnonymousStructOrUnion(Record.readInt());
791  RD->setHasObjectMember(Record.readInt());
792  RD->setHasVolatileMember(Record.readInt());
793  RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
794  RD->setNonTrivialToPrimitiveCopy(Record.readInt());
795  RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
796  RD->setParamDestroyedInCallee(Record.readInt());
798  return Redecl;
799 }
800 
802  VisitNamedDecl(VD);
803  // For function declarations, defer reading the type in case the function has
804  // a deduced return type that references an entity declared within the
805  // function.
806  if (isa<FunctionDecl>(VD))
807  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
808  else
809  VD->setType(Record.readType());
810 }
811 
813  VisitValueDecl(ECD);
814  if (Record.readInt())
815  ECD->setInitExpr(Record.readExpr());
816  ECD->setInitVal(Record.readAPSInt());
817  mergeMergeable(ECD);
818 }
819 
821  VisitValueDecl(DD);
822  DD->setInnerLocStart(ReadSourceLocation());
823  if (Record.readInt()) { // hasExtInfo
824  auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
825  ReadQualifierInfo(*Info);
826  DD->DeclInfo = Info;
827  }
828  QualType TSIType = Record.readType();
829  DD->setTypeSourceInfo(
830  TSIType.isNull() ? nullptr
831  : Reader.getContext().CreateTypeSourceInfo(TSIType));
832 }
833 
835  RedeclarableResult Redecl = VisitRedeclarable(FD);
836  VisitDeclaratorDecl(FD);
837 
838  // Attach a type to this function. Use the real type if possible, but fall
839  // back to the type as written if it involves a deduced return type.
840  if (FD->getTypeSourceInfo() &&
842  ->getReturnType()->getContainedAutoType()) {
843  // We'll set up the real type in Visit, once we've finished loading the
844  // function.
845  FD->setType(FD->getTypeSourceInfo()->getType());
846  Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
847  } else {
848  FD->setType(Reader.GetType(DeferredTypeID));
849  }
850  DeferredTypeID = 0;
851 
852  ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName());
853  FD->IdentifierNamespace = Record.readInt();
854 
855  // FunctionDecl's body is handled last at ASTDeclReader::Visit,
856  // after everything else is read.
857 
858  FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
859  FD->setInlineSpecified(Record.readInt());
860  FD->setImplicitlyInline(Record.readInt());
861  FD->setExplicitSpecified(Record.readInt());
862  FD->setVirtualAsWritten(Record.readInt());
863  FD->setPure(Record.readInt());
864  FD->setHasInheritedPrototype(Record.readInt());
865  FD->setHasWrittenPrototype(Record.readInt());
866  FD->setDeletedAsWritten(Record.readInt());
867  FD->setTrivial(Record.readInt());
868  FD->setTrivialForCall(Record.readInt());
869  FD->setDefaulted(Record.readInt());
870  FD->setExplicitlyDefaulted(Record.readInt());
871  FD->setHasImplicitReturnZero(Record.readInt());
872  FD->setConstexpr(Record.readInt());
873  FD->setUsesSEHTry(Record.readInt());
874  FD->setHasSkippedBody(Record.readInt());
875  FD->setIsMultiVersion(Record.readInt());
876  FD->setLateTemplateParsed(Record.readInt());
877 
878  FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
879  FD->EndRangeLoc = ReadSourceLocation();
880 
881  FD->ODRHash = Record.readInt();
882  FD->setHasODRHash(true);
883 
884  switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
886  mergeRedeclarable(FD, Redecl);
887  break;
889  // Merged when we merge the template.
890  FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
891  break;
893  auto *InstFD = ReadDeclAs<FunctionDecl>();
894  auto TSK = (TemplateSpecializationKind)Record.readInt();
895  SourceLocation POI = ReadSourceLocation();
896  FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
898  mergeRedeclarable(FD, Redecl);
899  break;
900  }
902  auto *Template = ReadDeclAs<FunctionTemplateDecl>();
903  auto TSK = (TemplateSpecializationKind)Record.readInt();
904 
905  // Template arguments.
907  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
908 
909  // Template args as written.
911  SourceLocation LAngleLoc, RAngleLoc;
912  bool HasTemplateArgumentsAsWritten = Record.readInt();
913  if (HasTemplateArgumentsAsWritten) {
914  unsigned NumTemplateArgLocs = Record.readInt();
915  TemplArgLocs.reserve(NumTemplateArgLocs);
916  for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
917  TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
918 
919  LAngleLoc = ReadSourceLocation();
920  RAngleLoc = ReadSourceLocation();
921  }
922 
923  SourceLocation POI = ReadSourceLocation();
924 
925  ASTContext &C = Reader.getContext();
926  TemplateArgumentList *TemplArgList
927  = TemplateArgumentList::CreateCopy(C, TemplArgs);
928  TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
929  for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
930  TemplArgsInfo.addArgument(TemplArgLocs[i]);
932  = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
933  TemplArgList,
934  HasTemplateArgumentsAsWritten ? &TemplArgsInfo
935  : nullptr,
936  POI);
937  FD->TemplateOrSpecialization = FTInfo;
938 
939  if (FD->isCanonicalDecl()) { // if canonical add to template's set.
940  // The template that contains the specializations set. It's not safe to
941  // use getCanonicalDecl on Template since it may still be initializing.
942  auto *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
943  // Get the InsertPos by FindNodeOrInsertPos() instead of calling
944  // InsertNode(FTInfo) directly to avoid the getASTContext() call in
945  // FunctionTemplateSpecializationInfo's Profile().
946  // We avoid getASTContext because a decl in the parent hierarchy may
947  // be initializing.
948  llvm::FoldingSetNodeID ID;
950  void *InsertPos = nullptr;
951  FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
952  FunctionTemplateSpecializationInfo *ExistingInfo =
953  CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
954  if (InsertPos)
955  CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
956  else {
957  assert(Reader.getContext().getLangOpts().Modules &&
958  "already deserialized this template specialization");
959  mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
960  }
961  }
962  break;
963  }
965  // Templates.
966  UnresolvedSet<8> TemplDecls;
967  unsigned NumTemplates = Record.readInt();
968  while (NumTemplates--)
969  TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
970 
971  // Templates args.
972  TemplateArgumentListInfo TemplArgs;
973  unsigned NumArgs = Record.readInt();
974  while (NumArgs--)
975  TemplArgs.addArgument(Record.readTemplateArgumentLoc());
976  TemplArgs.setLAngleLoc(ReadSourceLocation());
977  TemplArgs.setRAngleLoc(ReadSourceLocation());
978 
979  FD->setDependentTemplateSpecialization(Reader.getContext(),
980  TemplDecls, TemplArgs);
981  // These are not merged; we don't need to merge redeclarations of dependent
982  // template friends.
983  break;
984  }
985  }
986 
987  // Read in the parameters.
988  unsigned NumParams = Record.readInt();
990  Params.reserve(NumParams);
991  for (unsigned I = 0; I != NumParams; ++I)
992  Params.push_back(ReadDeclAs<ParmVarDecl>());
993  FD->setParams(Reader.getContext(), Params);
994 }
995 
997  VisitNamedDecl(MD);
998  if (Record.readInt()) {
999  // Load the body on-demand. Most clients won't care, because method
1000  // definitions rarely show up in headers.
1001  Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1002  HasPendingBody = true;
1003  MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
1004  MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
1005  }
1006  MD->setInstanceMethod(Record.readInt());
1007  MD->setVariadic(Record.readInt());
1008  MD->setPropertyAccessor(Record.readInt());
1009  MD->setDefined(Record.readInt());
1010  MD->setOverriding(Record.readInt());
1011  MD->setHasSkippedBody(Record.readInt());
1012 
1013  MD->setIsRedeclaration(Record.readInt());
1014  MD->setHasRedeclaration(Record.readInt());
1015  if (MD->hasRedeclaration())
1016  Reader.getContext().setObjCMethodRedeclaration(MD,
1017  ReadDeclAs<ObjCMethodDecl>());
1018 
1020  MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1021  MD->setRelatedResultType(Record.readInt());
1022  MD->setReturnType(Record.readType());
1023  MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
1024  MD->DeclEndLoc = ReadSourceLocation();
1025  unsigned NumParams = Record.readInt();
1027  Params.reserve(NumParams);
1028  for (unsigned I = 0; I != NumParams; ++I)
1029  Params.push_back(ReadDeclAs<ParmVarDecl>());
1030 
1031  MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1032  unsigned NumStoredSelLocs = Record.readInt();
1034  SelLocs.reserve(NumStoredSelLocs);
1035  for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1036  SelLocs.push_back(ReadSourceLocation());
1037 
1038  MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1039 }
1040 
1042  VisitTypedefNameDecl(D);
1043 
1044  D->Variance = Record.readInt();
1045  D->Index = Record.readInt();
1046  D->VarianceLoc = ReadSourceLocation();
1047  D->ColonLoc = ReadSourceLocation();
1048 }
1049 
1051  VisitNamedDecl(CD);
1052  CD->setAtStartLoc(ReadSourceLocation());
1053  CD->setAtEndRange(ReadSourceRange());
1054 }
1055 
1057  unsigned numParams = Record.readInt();
1058  if (numParams == 0)
1059  return nullptr;
1060 
1062  typeParams.reserve(numParams);
1063  for (unsigned i = 0; i != numParams; ++i) {
1064  auto *typeParam = ReadDeclAs<ObjCTypeParamDecl>();
1065  if (!typeParam)
1066  return nullptr;
1067 
1068  typeParams.push_back(typeParam);
1069  }
1070 
1071  SourceLocation lAngleLoc = ReadSourceLocation();
1072  SourceLocation rAngleLoc = ReadSourceLocation();
1073 
1074  return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1075  typeParams, rAngleLoc);
1076 }
1077 
1078 void ASTDeclReader::ReadObjCDefinitionData(
1079  struct ObjCInterfaceDecl::DefinitionData &Data) {
1080  // Read the superclass.
1081  Data.SuperClassTInfo = GetTypeSourceInfo();
1082 
1083  Data.EndLoc = ReadSourceLocation();
1084  Data.HasDesignatedInitializers = Record.readInt();
1085 
1086  // Read the directly referenced protocols and their SourceLocations.
1087  unsigned NumProtocols = Record.readInt();
1089  Protocols.reserve(NumProtocols);
1090  for (unsigned I = 0; I != NumProtocols; ++I)
1091  Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1093  ProtoLocs.reserve(NumProtocols);
1094  for (unsigned I = 0; I != NumProtocols; ++I)
1095  ProtoLocs.push_back(ReadSourceLocation());
1096  Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1097  Reader.getContext());
1098 
1099  // Read the transitive closure of protocols referenced by this class.
1100  NumProtocols = Record.readInt();
1101  Protocols.clear();
1102  Protocols.reserve(NumProtocols);
1103  for (unsigned I = 0; I != NumProtocols; ++I)
1104  Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1105  Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1106  Reader.getContext());
1107 }
1108 
1109 void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1110  struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1111  // FIXME: odr checking?
1112 }
1113 
1115  RedeclarableResult Redecl = VisitRedeclarable(ID);
1116  VisitObjCContainerDecl(ID);
1117  DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1118  mergeRedeclarable(ID, Redecl);
1119 
1120  ID->TypeParamList = ReadObjCTypeParamList();
1121  if (Record.readInt()) {
1122  // Read the definition.
1123  ID->allocateDefinitionData();
1124 
1125  ReadObjCDefinitionData(ID->data());
1126  ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1127  if (Canon->Data.getPointer()) {
1128  // If we already have a definition, keep the definition invariant and
1129  // merge the data.
1130  MergeDefinitionData(Canon, std::move(ID->data()));
1131  ID->Data = Canon->Data;
1132  } else {
1133  // Set the definition data of the canonical declaration, so other
1134  // redeclarations will see it.
1135  ID->getCanonicalDecl()->Data = ID->Data;
1136 
1137  // We will rebuild this list lazily.
1138  ID->setIvarList(nullptr);
1139  }
1140 
1141  // Note that we have deserialized a definition.
1142  Reader.PendingDefinitions.insert(ID);
1143 
1144  // Note that we've loaded this Objective-C class.
1145  Reader.ObjCClassesLoaded.push_back(ID);
1146  } else {
1147  ID->Data = ID->getCanonicalDecl()->Data;
1148  }
1149 }
1150 
1152  VisitFieldDecl(IVD);
1153  IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1154  // This field will be built lazily.
1155  IVD->setNextIvar(nullptr);
1156  bool synth = Record.readInt();
1157  IVD->setSynthesize(synth);
1158 }
1159 
1160 void ASTDeclReader::ReadObjCDefinitionData(
1161  struct ObjCProtocolDecl::DefinitionData &Data) {
1162  unsigned NumProtoRefs = Record.readInt();
1164  ProtoRefs.reserve(NumProtoRefs);
1165  for (unsigned I = 0; I != NumProtoRefs; ++I)
1166  ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1168  ProtoLocs.reserve(NumProtoRefs);
1169  for (unsigned I = 0; I != NumProtoRefs; ++I)
1170  ProtoLocs.push_back(ReadSourceLocation());
1171  Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1172  ProtoLocs.data(), Reader.getContext());
1173 }
1174 
1175 void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1176  struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1177  // FIXME: odr checking?
1178 }
1179 
1181  RedeclarableResult Redecl = VisitRedeclarable(PD);
1182  VisitObjCContainerDecl(PD);
1183  mergeRedeclarable(PD, Redecl);
1184 
1185  if (Record.readInt()) {
1186  // Read the definition.
1187  PD->allocateDefinitionData();
1188 
1189  ReadObjCDefinitionData(PD->data());
1190 
1191  ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1192  if (Canon->Data.getPointer()) {
1193  // If we already have a definition, keep the definition invariant and
1194  // merge the data.
1195  MergeDefinitionData(Canon, std::move(PD->data()));
1196  PD->Data = Canon->Data;
1197  } else {
1198  // Set the definition data of the canonical declaration, so other
1199  // redeclarations will see it.
1200  PD->getCanonicalDecl()->Data = PD->Data;
1201  }
1202  // Note that we have deserialized a definition.
1203  Reader.PendingDefinitions.insert(PD);
1204  } else {
1205  PD->Data = PD->getCanonicalDecl()->Data;
1206  }
1207 }
1208 
1210  VisitFieldDecl(FD);
1211 }
1212 
1214  VisitObjCContainerDecl(CD);
1215  CD->setCategoryNameLoc(ReadSourceLocation());
1216  CD->setIvarLBraceLoc(ReadSourceLocation());
1217  CD->setIvarRBraceLoc(ReadSourceLocation());
1218 
1219  // Note that this category has been deserialized. We do this before
1220  // deserializing the interface declaration, so that it will consider this
1221  /// category.
1222  Reader.CategoriesDeserialized.insert(CD);
1223 
1224  CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1225  CD->TypeParamList = ReadObjCTypeParamList();
1226  unsigned NumProtoRefs = Record.readInt();
1228  ProtoRefs.reserve(NumProtoRefs);
1229  for (unsigned I = 0; I != NumProtoRefs; ++I)
1230  ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1232  ProtoLocs.reserve(NumProtoRefs);
1233  for (unsigned I = 0; I != NumProtoRefs; ++I)
1234  ProtoLocs.push_back(ReadSourceLocation());
1235  CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1236  Reader.getContext());
1237 
1238  // Protocols in the class extension belong to the class.
1239  if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1240  CD->ClassInterface->mergeClassExtensionProtocolList(
1241  (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1242  Reader.getContext());
1243 }
1244 
1246  VisitNamedDecl(CAD);
1247  CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1248 }
1249 
1251  VisitNamedDecl(D);
1252  D->setAtLoc(ReadSourceLocation());
1253  D->setLParenLoc(ReadSourceLocation());
1254  QualType T = Record.readType();
1255  TypeSourceInfo *TSI = GetTypeSourceInfo();
1256  D->setType(T, TSI);
1258  (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1260  (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1262  (ObjCPropertyDecl::PropertyControl)Record.readInt());
1263  DeclarationName GetterName = Record.readDeclarationName();
1264  SourceLocation GetterLoc = ReadSourceLocation();
1265  D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1266  DeclarationName SetterName = Record.readDeclarationName();
1267  SourceLocation SetterLoc = ReadSourceLocation();
1268  D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1269  D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1270  D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1271  D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1272 }
1273 
1275  VisitObjCContainerDecl(D);
1276  D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1277 }
1278 
1280  VisitObjCImplDecl(D);
1281  D->CategoryNameLoc = ReadSourceLocation();
1282 }
1283 
1285  VisitObjCImplDecl(D);
1286  D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1287  D->SuperLoc = ReadSourceLocation();
1288  D->setIvarLBraceLoc(ReadSourceLocation());
1289  D->setIvarRBraceLoc(ReadSourceLocation());
1290  D->setHasNonZeroConstructors(Record.readInt());
1291  D->setHasDestructors(Record.readInt());
1292  D->NumIvarInitializers = Record.readInt();
1293  if (D->NumIvarInitializers)
1294  D->IvarInitializers = ReadGlobalOffset();
1295 }
1296 
1298  VisitDecl(D);
1299  D->setAtLoc(ReadSourceLocation());
1300  D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1301  D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1302  D->IvarLoc = ReadSourceLocation();
1303  D->setGetterCXXConstructor(Record.readExpr());
1304  D->setSetterCXXAssignment(Record.readExpr());
1305 }
1306 
1308  VisitDeclaratorDecl(FD);
1309  FD->Mutable = Record.readInt();
1310 
1311  if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1312  FD->InitStorage.setInt(ISK);
1313  FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1314  ? Record.readType().getAsOpaquePtr()
1315  : Record.readExpr());
1316  }
1317 
1318  if (auto *BW = Record.readExpr())
1319  FD->setBitWidth(BW);
1320 
1321  if (!FD->getDeclName()) {
1322  if (auto *Tmpl = ReadDeclAs<FieldDecl>())
1323  Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1324  }
1325  mergeMergeable(FD);
1326 }
1327 
1329  VisitDeclaratorDecl(PD);
1330  PD->GetterId = Record.getIdentifierInfo();
1331  PD->SetterId = Record.getIdentifierInfo();
1332 }
1333 
1335  VisitValueDecl(FD);
1336 
1337  FD->ChainingSize = Record.readInt();
1338  assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1339  FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1340 
1341  for (unsigned I = 0; I != FD->ChainingSize; ++I)
1342  FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1343 
1344  mergeMergeable(FD);
1345 }
1346 
1347 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1348  RedeclarableResult Redecl = VisitRedeclarable(VD);
1349  VisitDeclaratorDecl(VD);
1350 
1351  VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1352  VD->VarDeclBits.TSCSpec = Record.readInt();
1353  VD->VarDeclBits.InitStyle = Record.readInt();
1354  VD->VarDeclBits.ARCPseudoStrong = Record.readInt();
1355  if (!isa<ParmVarDecl>(VD)) {
1356  VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1357  Record.readInt();
1358  VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1359  VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1360  VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1361  VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1362  VD->NonParmVarDeclBits.IsInline = Record.readInt();
1363  VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1364  VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1365  VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1366  VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1367  VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1368  VD->NonParmVarDeclBits.EscapingByref = Record.readInt();
1369  }
1370  auto VarLinkage = Linkage(Record.readInt());
1371  VD->setCachedLinkage(VarLinkage);
1372 
1373  // Reconstruct the one piece of the IdentifierNamespace that we need.
1374  if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1376  VD->setLocalExternDecl();
1377 
1378  if (uint64_t Val = Record.readInt()) {
1379  VD->setInit(Record.readExpr());
1380  if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1381  EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1382  Eval->CheckedICE = true;
1383  Eval->IsICE = Val == 3;
1384  }
1385  }
1386 
1387  if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1388  Expr *CopyExpr = Record.readExpr();
1389  if (CopyExpr)
1390  Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1391  }
1392 
1393  if (VD->getStorageDuration() == SD_Static && Record.readInt())
1394  Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1395 
1396  enum VarKind {
1397  VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1398  };
1399  switch ((VarKind)Record.readInt()) {
1400  case VarNotTemplate:
1401  // Only true variables (not parameters or implicit parameters) can be
1402  // merged; the other kinds are not really redeclarable at all.
1403  if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1404  !isa<VarTemplateSpecializationDecl>(VD))
1405  mergeRedeclarable(VD, Redecl);
1406  break;
1407  case VarTemplate:
1408  // Merged when we merge the template.
1409  VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1410  break;
1411  case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1412  auto *Tmpl = ReadDeclAs<VarDecl>();
1413  auto TSK = (TemplateSpecializationKind)Record.readInt();
1414  SourceLocation POI = ReadSourceLocation();
1415  Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1416  mergeRedeclarable(VD, Redecl);
1417  break;
1418  }
1419  }
1420 
1421  return Redecl;
1422 }
1423 
1425  VisitVarDecl(PD);
1426 }
1427 
1429  VisitVarDecl(PD);
1430  unsigned isObjCMethodParam = Record.readInt();
1431  unsigned scopeDepth = Record.readInt();
1432  unsigned scopeIndex = Record.readInt();
1433  unsigned declQualifier = Record.readInt();
1434  if (isObjCMethodParam) {
1435  assert(scopeDepth == 0);
1436  PD->setObjCMethodScopeInfo(scopeIndex);
1437  PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1438  } else {
1439  PD->setScopeInfo(scopeDepth, scopeIndex);
1440  }
1441  PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1442  PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1443  if (Record.readInt()) // hasUninstantiatedDefaultArg.
1444  PD->setUninstantiatedDefaultArg(Record.readExpr());
1445 
1446  // FIXME: If this is a redeclaration of a function from another module, handle
1447  // inheritance of default arguments.
1448 }
1449 
1451  VisitVarDecl(DD);
1452  auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1453  for (unsigned I = 0; I != DD->NumBindings; ++I)
1454  BDs[I] = ReadDeclAs<BindingDecl>();
1455 }
1456 
1458  VisitValueDecl(BD);
1459  BD->Binding = Record.readExpr();
1460 }
1461 
1463  VisitDecl(AD);
1464  AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1465  AD->setRParenLoc(ReadSourceLocation());
1466 }
1467 
1469  VisitDecl(BD);
1470  BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1471  BD->setSignatureAsWritten(GetTypeSourceInfo());
1472  unsigned NumParams = Record.readInt();
1474  Params.reserve(NumParams);
1475  for (unsigned I = 0; I != NumParams; ++I)
1476  Params.push_back(ReadDeclAs<ParmVarDecl>());
1477  BD->setParams(Params);
1478 
1479  BD->setIsVariadic(Record.readInt());
1480  BD->setBlockMissingReturnType(Record.readInt());
1481  BD->setIsConversionFromLambda(Record.readInt());
1482  BD->setDoesNotEscape(Record.readInt());
1483  BD->setCanAvoidCopyToHeap(Record.readInt());
1484 
1485  bool capturesCXXThis = Record.readInt();
1486  unsigned numCaptures = Record.readInt();
1488  captures.reserve(numCaptures);
1489  for (unsigned i = 0; i != numCaptures; ++i) {
1490  auto *decl = ReadDeclAs<VarDecl>();
1491  unsigned flags = Record.readInt();
1492  bool byRef = (flags & 1);
1493  bool nested = (flags & 2);
1494  Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1495 
1496  captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1497  }
1498  BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1499 }
1500 
1502  VisitDecl(CD);
1503  unsigned ContextParamPos = Record.readInt();
1504  CD->setNothrow(Record.readInt() != 0);
1505  // Body is set by VisitCapturedStmt.
1506  for (unsigned I = 0; I < CD->NumParams; ++I) {
1507  if (I != ContextParamPos)
1508  CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1509  else
1510  CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1511  }
1512 }
1513 
1515  VisitDecl(D);
1516  D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1517  D->setExternLoc(ReadSourceLocation());
1518  D->setRBraceLoc(ReadSourceLocation());
1519 }
1520 
1522  VisitDecl(D);
1523  D->RBraceLoc = ReadSourceLocation();
1524 }
1525 
1527  VisitNamedDecl(D);
1528  D->setLocStart(ReadSourceLocation());
1529 }
1530 
1532  RedeclarableResult Redecl = VisitRedeclarable(D);
1533  VisitNamedDecl(D);
1534  D->setInline(Record.readInt());
1535  D->LocStart = ReadSourceLocation();
1536  D->RBraceLoc = ReadSourceLocation();
1537 
1538  // Defer loading the anonymous namespace until we've finished merging
1539  // this namespace; loading it might load a later declaration of the
1540  // same namespace, and we have an invariant that older declarations
1541  // get merged before newer ones try to merge.
1542  GlobalDeclID AnonNamespace = 0;
1543  if (Redecl.getFirstID() == ThisDeclID) {
1544  AnonNamespace = ReadDeclID();
1545  } else {
1546  // Link this namespace back to the first declaration, which has already
1547  // been deserialized.
1548  D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1549  }
1550 
1551  mergeRedeclarable(D, Redecl);
1552 
1553  if (AnonNamespace) {
1554  // Each module has its own anonymous namespace, which is disjoint from
1555  // any other module's anonymous namespaces, so don't attach the anonymous
1556  // namespace at all.
1557  auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1558  if (!Record.isModule())
1559  D->setAnonymousNamespace(Anon);
1560  }
1561 }
1562 
1564  RedeclarableResult Redecl = VisitRedeclarable(D);
1565  VisitNamedDecl(D);
1566  D->NamespaceLoc = ReadSourceLocation();
1567  D->IdentLoc = ReadSourceLocation();
1568  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1569  D->Namespace = ReadDeclAs<NamedDecl>();
1570  mergeRedeclarable(D, Redecl);
1571 }
1572 
1574  VisitNamedDecl(D);
1575  D->setUsingLoc(ReadSourceLocation());
1576  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1577  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1578  D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1579  D->setTypename(Record.readInt());
1580  if (auto *Pattern = ReadDeclAs<NamedDecl>())
1581  Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1582  mergeMergeable(D);
1583 }
1584 
1586  VisitNamedDecl(D);
1587  D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1588  auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1589  for (unsigned I = 0; I != D->NumExpansions; ++I)
1590  Expansions[I] = ReadDeclAs<NamedDecl>();
1591  mergeMergeable(D);
1592 }
1593 
1595  RedeclarableResult Redecl = VisitRedeclarable(D);
1596  VisitNamedDecl(D);
1597  D->Underlying = ReadDeclAs<NamedDecl>();
1598  D->IdentifierNamespace = Record.readInt();
1599  D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1600  auto *Pattern = ReadDeclAs<UsingShadowDecl>();
1601  if (Pattern)
1602  Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1603  mergeRedeclarable(D, Redecl);
1604 }
1605 
1608  VisitUsingShadowDecl(D);
1609  D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1610  D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1611  D->IsVirtual = Record.readInt();
1612 }
1613 
1615  VisitNamedDecl(D);
1616  D->UsingLoc = ReadSourceLocation();
1617  D->NamespaceLoc = ReadSourceLocation();
1618  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1619  D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1620  D->CommonAncestor = ReadDeclAs<DeclContext>();
1621 }
1622 
1624  VisitValueDecl(D);
1625  D->setUsingLoc(ReadSourceLocation());
1626  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1627  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1628  D->EllipsisLoc = ReadSourceLocation();
1629  mergeMergeable(D);
1630 }
1631 
1634  VisitTypeDecl(D);
1635  D->TypenameLocation = ReadSourceLocation();
1636  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1637  D->EllipsisLoc = ReadSourceLocation();
1638  mergeMergeable(D);
1639 }
1640 
1641 void ASTDeclReader::ReadCXXDefinitionData(
1642  struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1643  // Note: the caller has deserialized the IsLambda bit already.
1644  Data.UserDeclaredConstructor = Record.readInt();
1645  Data.UserDeclaredSpecialMembers = Record.readInt();
1646  Data.Aggregate = Record.readInt();
1647  Data.PlainOldData = Record.readInt();
1648  Data.Empty = Record.readInt();
1649  Data.Polymorphic = Record.readInt();
1650  Data.Abstract = Record.readInt();
1651  Data.IsStandardLayout = Record.readInt();
1652  Data.IsCXX11StandardLayout = Record.readInt();
1653  Data.HasBasesWithFields = Record.readInt();
1654  Data.HasBasesWithNonStaticDataMembers = Record.readInt();
1655  Data.HasPrivateFields = Record.readInt();
1656  Data.HasProtectedFields = Record.readInt();
1657  Data.HasPublicFields = Record.readInt();
1658  Data.HasMutableFields = Record.readInt();
1659  Data.HasVariantMembers = Record.readInt();
1660  Data.HasOnlyCMembers = Record.readInt();
1661  Data.HasInClassInitializer = Record.readInt();
1662  Data.HasUninitializedReferenceMember = Record.readInt();
1663  Data.HasUninitializedFields = Record.readInt();
1664  Data.HasInheritedConstructor = Record.readInt();
1665  Data.HasInheritedAssignment = Record.readInt();
1666  Data.NeedOverloadResolutionForCopyConstructor = Record.readInt();
1667  Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1668  Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1669  Data.NeedOverloadResolutionForDestructor = Record.readInt();
1670  Data.DefaultedCopyConstructorIsDeleted = Record.readInt();
1671  Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1672  Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1673  Data.DefaultedDestructorIsDeleted = Record.readInt();
1674  Data.HasTrivialSpecialMembers = Record.readInt();
1675  Data.HasTrivialSpecialMembersForCall = Record.readInt();
1676  Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1677  Data.DeclaredNonTrivialSpecialMembersForCall = Record.readInt();
1678  Data.HasIrrelevantDestructor = Record.readInt();
1679  Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1680  Data.HasDefaultedDefaultConstructor = Record.readInt();
1681  Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1682  Data.HasConstexprDefaultConstructor = Record.readInt();
1683  Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1684  Data.ComputedVisibleConversions = Record.readInt();
1685  Data.UserProvidedDefaultConstructor = Record.readInt();
1686  Data.DeclaredSpecialMembers = Record.readInt();
1687  Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1688  Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1689  Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1690  Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1691  Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1692  Data.ODRHash = Record.readInt();
1693  Data.HasODRHash = true;
1694 
1695  if (Record.readInt())
1696  Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1697 
1698  Data.NumBases = Record.readInt();
1699  if (Data.NumBases)
1700  Data.Bases = ReadGlobalOffset();
1701  Data.NumVBases = Record.readInt();
1702  if (Data.NumVBases)
1703  Data.VBases = ReadGlobalOffset();
1704 
1705  Record.readUnresolvedSet(Data.Conversions);
1706  Record.readUnresolvedSet(Data.VisibleConversions);
1707  assert(Data.Definition && "Data.Definition should be already set!");
1708  Data.FirstFriend = ReadDeclID();
1709 
1710  if (Data.IsLambda) {
1711  using Capture = LambdaCapture;
1712 
1713  auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1714  Lambda.Dependent = Record.readInt();
1715  Lambda.IsGenericLambda = Record.readInt();
1716  Lambda.CaptureDefault = Record.readInt();
1717  Lambda.NumCaptures = Record.readInt();
1718  Lambda.NumExplicitCaptures = Record.readInt();
1719  Lambda.ManglingNumber = Record.readInt();
1720  Lambda.ContextDecl = ReadDeclID();
1721  Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1722  sizeof(Capture) * Lambda.NumCaptures);
1723  Capture *ToCapture = Lambda.Captures;
1724  Lambda.MethodTyInfo = GetTypeSourceInfo();
1725  for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1726  SourceLocation Loc = ReadSourceLocation();
1727  bool IsImplicit = Record.readInt();
1728  auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1729  switch (Kind) {
1730  case LCK_StarThis:
1731  case LCK_This:
1732  case LCK_VLAType:
1733  *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1734  break;
1735  case LCK_ByCopy:
1736  case LCK_ByRef:
1737  auto *Var = ReadDeclAs<VarDecl>();
1738  SourceLocation EllipsisLoc = ReadSourceLocation();
1739  *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1740  break;
1741  }
1742  }
1743  }
1744 }
1745 
1746 void ASTDeclReader::MergeDefinitionData(
1747  CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1748  assert(D->DefinitionData &&
1749  "merging class definition into non-definition");
1750  auto &DD = *D->DefinitionData;
1751 
1752  if (DD.Definition != MergeDD.Definition) {
1753  // Track that we merged the definitions.
1754  Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1755  DD.Definition));
1756  Reader.PendingDefinitions.erase(MergeDD.Definition);
1757  MergeDD.Definition->setCompleteDefinition(false);
1758  Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1759  assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1760  "already loaded pending lookups for merged definition");
1761  }
1762 
1763  auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1764  if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1765  PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1766  // We faked up this definition data because we found a class for which we'd
1767  // not yet loaded the definition. Replace it with the real thing now.
1768  assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1769  PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1770 
1771  // Don't change which declaration is the definition; that is required
1772  // to be invariant once we select it.
1773  auto *Def = DD.Definition;
1774  DD = std::move(MergeDD);
1775  DD.Definition = Def;
1776  return;
1777  }
1778 
1779  // FIXME: Move this out into a .def file?
1780  bool DetectedOdrViolation = false;
1781 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1782 #define MATCH_FIELD(Field) \
1783  DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1784  OR_FIELD(Field)
1785  MATCH_FIELD(UserDeclaredConstructor)
1786  MATCH_FIELD(UserDeclaredSpecialMembers)
1787  MATCH_FIELD(Aggregate)
1788  MATCH_FIELD(PlainOldData)
1789  MATCH_FIELD(Empty)
1790  MATCH_FIELD(Polymorphic)
1791  MATCH_FIELD(Abstract)
1792  MATCH_FIELD(IsStandardLayout)
1793  MATCH_FIELD(IsCXX11StandardLayout)
1794  MATCH_FIELD(HasBasesWithFields)
1795  MATCH_FIELD(HasBasesWithNonStaticDataMembers)
1796  MATCH_FIELD(HasPrivateFields)
1797  MATCH_FIELD(HasProtectedFields)
1798  MATCH_FIELD(HasPublicFields)
1799  MATCH_FIELD(HasMutableFields)
1800  MATCH_FIELD(HasVariantMembers)
1801  MATCH_FIELD(HasOnlyCMembers)
1802  MATCH_FIELD(HasInClassInitializer)
1803  MATCH_FIELD(HasUninitializedReferenceMember)
1804  MATCH_FIELD(HasUninitializedFields)
1805  MATCH_FIELD(HasInheritedConstructor)
1806  MATCH_FIELD(HasInheritedAssignment)
1807  MATCH_FIELD(NeedOverloadResolutionForCopyConstructor)
1808  MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1809  MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1810  MATCH_FIELD(NeedOverloadResolutionForDestructor)
1811  MATCH_FIELD(DefaultedCopyConstructorIsDeleted)
1812  MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1813  MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1814  MATCH_FIELD(DefaultedDestructorIsDeleted)
1815  OR_FIELD(HasTrivialSpecialMembers)
1816  OR_FIELD(HasTrivialSpecialMembersForCall)
1817  OR_FIELD(DeclaredNonTrivialSpecialMembers)
1818  OR_FIELD(DeclaredNonTrivialSpecialMembersForCall)
1819  MATCH_FIELD(HasIrrelevantDestructor)
1820  OR_FIELD(HasConstexprNonCopyMoveConstructor)
1821  OR_FIELD(HasDefaultedDefaultConstructor)
1822  MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1823  OR_FIELD(HasConstexprDefaultConstructor)
1824  MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1825  // ComputedVisibleConversions is handled below.
1826  MATCH_FIELD(UserProvidedDefaultConstructor)
1827  OR_FIELD(DeclaredSpecialMembers)
1828  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1829  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1830  MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1831  OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1832  OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1833  MATCH_FIELD(IsLambda)
1834 #undef OR_FIELD
1835 #undef MATCH_FIELD
1836 
1837  if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1838  DetectedOdrViolation = true;
1839  // FIXME: Issue a diagnostic if the base classes don't match when we come
1840  // to lazily load them.
1841 
1842  // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1843  // match when we come to lazily load them.
1844  if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1845  DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1846  DD.ComputedVisibleConversions = true;
1847  }
1848 
1849  // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1850  // lazily load it.
1851 
1852  if (DD.IsLambda) {
1853  // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1854  // when they occur within the body of a function template specialization).
1855  }
1856 
1857  if (D->getODRHash() != MergeDD.ODRHash) {
1858  DetectedOdrViolation = true;
1859  }
1860 
1861  if (DetectedOdrViolation)
1862  Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1863  {MergeDD.Definition, &MergeDD});
1864 }
1865 
1866 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1867  struct CXXRecordDecl::DefinitionData *DD;
1868  ASTContext &C = Reader.getContext();
1869 
1870  // Determine whether this is a lambda closure type, so that we can
1871  // allocate the appropriate DefinitionData structure.
1872  bool IsLambda = Record.readInt();
1873  if (IsLambda)
1874  DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1875  LCD_None);
1876  else
1877  DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1878 
1879  CXXRecordDecl *Canon = D->getCanonicalDecl();
1880  // Set decl definition data before reading it, so that during deserialization
1881  // when we read CXXRecordDecl, it already has definition data and we don't
1882  // set fake one.
1883  if (!Canon->DefinitionData)
1884  Canon->DefinitionData = DD;
1885  D->DefinitionData = Canon->DefinitionData;
1886  ReadCXXDefinitionData(*DD, D);
1887 
1888  // We might already have a different definition for this record. This can
1889  // happen either because we're reading an update record, or because we've
1890  // already done some merging. Either way, just merge into it.
1891  if (Canon->DefinitionData != DD) {
1892  MergeDefinitionData(Canon, std::move(*DD));
1893  return;
1894  }
1895 
1896  // Mark this declaration as being a definition.
1897  D->setCompleteDefinition(true);
1898 
1899  // If this is not the first declaration or is an update record, we can have
1900  // other redeclarations already. Make a note that we need to propagate the
1901  // DefinitionData pointer onto them.
1902  if (Update || Canon != D)
1903  Reader.PendingDefinitions.insert(D);
1904 }
1905 
1906 ASTDeclReader::RedeclarableResult
1908  RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1909 
1910  ASTContext &C = Reader.getContext();
1911 
1912  enum CXXRecKind {
1913  CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1914  };
1915  switch ((CXXRecKind)Record.readInt()) {
1916  case CXXRecNotTemplate:
1917  // Merged when we merge the folding set entry in the primary template.
1918  if (!isa<ClassTemplateSpecializationDecl>(D))
1919  mergeRedeclarable(D, Redecl);
1920  break;
1921  case CXXRecTemplate: {
1922  // Merged when we merge the template.
1923  auto *Template = ReadDeclAs<ClassTemplateDecl>();
1924  D->TemplateOrInstantiation = Template;
1925  if (!Template->getTemplatedDecl()) {
1926  // We've not actually loaded the ClassTemplateDecl yet, because we're
1927  // currently being loaded as its pattern. Rely on it to set up our
1928  // TypeForDecl (see VisitClassTemplateDecl).
1929  //
1930  // Beware: we do not yet know our canonical declaration, and may still
1931  // get merged once the surrounding class template has got off the ground.
1932  DeferredTypeID = 0;
1933  }
1934  break;
1935  }
1936  case CXXRecMemberSpecialization: {
1937  auto *RD = ReadDeclAs<CXXRecordDecl>();
1938  auto TSK = (TemplateSpecializationKind)Record.readInt();
1939  SourceLocation POI = ReadSourceLocation();
1940  MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1941  MSI->setPointOfInstantiation(POI);
1942  D->TemplateOrInstantiation = MSI;
1943  mergeRedeclarable(D, Redecl);
1944  break;
1945  }
1946  }
1947 
1948  bool WasDefinition = Record.readInt();
1949  if (WasDefinition)
1950  ReadCXXRecordDefinition(D, /*Update*/false);
1951  else
1952  // Propagate DefinitionData pointer from the canonical declaration.
1953  D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1954 
1955  // Lazily load the key function to avoid deserializing every method so we can
1956  // compute it.
1957  if (WasDefinition) {
1958  DeclID KeyFn = ReadDeclID();
1959  if (KeyFn && D->isCompleteDefinition())
1960  // FIXME: This is wrong for the ARM ABI, where some other module may have
1961  // made this function no longer be a key function. We need an update
1962  // record or similar for that case.
1963  C.KeyFunctions[D] = KeyFn;
1964  }
1965 
1966  return Redecl;
1967 }
1968 
1970  VisitFunctionDecl(D);
1971  D->setIsCopyDeductionCandidate(Record.readInt());
1972 }
1973 
1975  VisitFunctionDecl(D);
1976 
1977  unsigned NumOverridenMethods = Record.readInt();
1978  if (D->isCanonicalDecl()) {
1979  while (NumOverridenMethods--) {
1980  // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1981  // MD may be initializing.
1982  if (auto *MD = ReadDeclAs<CXXMethodDecl>())
1983  Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1984  }
1985  } else {
1986  // We don't care about which declarations this used to override; we get
1987  // the relevant information from the canonical declaration.
1988  Record.skipInts(NumOverridenMethods);
1989  }
1990 }
1991 
1993  // We need the inherited constructor information to merge the declaration,
1994  // so we have to read it before we call VisitCXXMethodDecl.
1995  if (D->isInheritingConstructor()) {
1996  auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1997  auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1998  *D->getTrailingObjects<InheritedConstructor>() =
1999  InheritedConstructor(Shadow, Ctor);
2000  }
2001 
2002  VisitCXXMethodDecl(D);
2003 }
2004 
2006  VisitCXXMethodDecl(D);
2007 
2008  if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
2009  CXXDestructorDecl *Canon = D->getCanonicalDecl();
2010  auto *ThisArg = Record.readExpr();
2011  // FIXME: Check consistency if we have an old and new operator delete.
2012  if (!Canon->OperatorDelete) {
2013  Canon->OperatorDelete = OperatorDelete;
2014  Canon->OperatorDeleteThisArg = ThisArg;
2015  }
2016  }
2017 }
2018 
2020  VisitCXXMethodDecl(D);
2021 }
2022 
2024  VisitDecl(D);
2025  D->ImportedAndComplete.setPointer(readModule());
2026  D->ImportedAndComplete.setInt(Record.readInt());
2027  auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
2028  for (unsigned I = 0, N = Record.back(); I != N; ++I)
2029  StoredLocs[I] = ReadSourceLocation();
2030  Record.skipInts(1); // The number of stored source locations.
2031 }
2032 
2034  VisitDecl(D);
2035  D->setColonLoc(ReadSourceLocation());
2036 }
2037 
2039  VisitDecl(D);
2040  if (Record.readInt()) // hasFriendDecl
2041  D->Friend = ReadDeclAs<NamedDecl>();
2042  else
2043  D->Friend = GetTypeSourceInfo();
2044  for (unsigned i = 0; i != D->NumTPLists; ++i)
2045  D->getTrailingObjects<TemplateParameterList *>()[i] =
2046  Record.readTemplateParameterList();
2047  D->NextFriend = ReadDeclID();
2048  D->UnsupportedFriend = (Record.readInt() != 0);
2049  D->FriendLoc = ReadSourceLocation();
2050 }
2051 
2053  VisitDecl(D);
2054  unsigned NumParams = Record.readInt();
2055  D->NumParams = NumParams;
2056  D->Params = new TemplateParameterList*[NumParams];
2057  for (unsigned i = 0; i != NumParams; ++i)
2058  D->Params[i] = Record.readTemplateParameterList();
2059  if (Record.readInt()) // HasFriendDecl
2060  D->Friend = ReadDeclAs<NamedDecl>();
2061  else
2062  D->Friend = GetTypeSourceInfo();
2063  D->FriendLoc = ReadSourceLocation();
2064 }
2065 
2067  VisitNamedDecl(D);
2068 
2069  DeclID PatternID = ReadDeclID();
2070  auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2071  TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2072  // FIXME handle associated constraints
2073  D->init(TemplatedDecl, TemplateParams);
2074 
2075  return PatternID;
2076 }
2077 
2078 ASTDeclReader::RedeclarableResult
2080  RedeclarableResult Redecl = VisitRedeclarable(D);
2081 
2082  // Make sure we've allocated the Common pointer first. We do this before
2083  // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2085  if (!CanonD->Common) {
2086  CanonD->Common = CanonD->newCommon(Reader.getContext());
2087  Reader.PendingDefinitions.insert(CanonD);
2088  }
2089  D->Common = CanonD->Common;
2090 
2091  // If this is the first declaration of the template, fill in the information
2092  // for the 'common' pointer.
2093  if (ThisDeclID == Redecl.getFirstID()) {
2094  if (auto *RTD = ReadDeclAs<RedeclarableTemplateDecl>()) {
2095  assert(RTD->getKind() == D->getKind() &&
2096  "InstantiatedFromMemberTemplate kind mismatch");
2098  if (Record.readInt())
2100  }
2101  }
2102 
2103  DeclID PatternID = VisitTemplateDecl(D);
2104  D->IdentifierNamespace = Record.readInt();
2105 
2106  mergeRedeclarable(D, Redecl, PatternID);
2107 
2108  // If we merged the template with a prior declaration chain, merge the common
2109  // pointer.
2110  // FIXME: Actually merge here, don't just overwrite.
2111  D->Common = D->getCanonicalDecl()->Common;
2112 
2113  return Redecl;
2114 }
2115 
2117  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2118 
2119  if (ThisDeclID == Redecl.getFirstID()) {
2120  // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2121  // the specializations.
2123  ReadDeclIDList(SpecIDs);
2125  }
2126 
2127  if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2128  // We were loaded before our templated declaration was. We've not set up
2129  // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2130  // it now.
2131  Reader.getContext().getInjectedClassNameType(
2133  }
2134 }
2135 
2137  llvm_unreachable("BuiltinTemplates are not serialized");
2138 }
2139 
2140 /// TODO: Unify with ClassTemplateDecl version?
2141 /// May require unifying ClassTemplateDecl and
2142 /// VarTemplateDecl beyond TemplateDecl...
2144  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2145 
2146  if (ThisDeclID == Redecl.getFirstID()) {
2147  // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2148  // the specializations.
2150  ReadDeclIDList(SpecIDs);
2152  }
2153 }
2154 
2155 ASTDeclReader::RedeclarableResult
2158  RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2159 
2160  ASTContext &C = Reader.getContext();
2161  if (Decl *InstD = ReadDecl()) {
2162  if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2163  D->SpecializedTemplate = CTD;
2164  } else {
2166  Record.readTemplateArgumentList(TemplArgs);
2167  TemplateArgumentList *ArgList
2168  = TemplateArgumentList::CreateCopy(C, TemplArgs);
2169  auto *PS =
2171  SpecializedPartialSpecialization();
2172  PS->PartialSpecialization
2173  = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2174  PS->TemplateArgs = ArgList;
2175  D->SpecializedTemplate = PS;
2176  }
2177  }
2178 
2180  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2181  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2182  D->PointOfInstantiation = ReadSourceLocation();
2183  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2184 
2185  bool writtenAsCanonicalDecl = Record.readInt();
2186  if (writtenAsCanonicalDecl) {
2187  auto *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2188  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2189  // Set this as, or find, the canonical declaration for this specialization
2191  if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2192  CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2193  .GetOrInsertNode(Partial);
2194  } else {
2195  CanonSpec =
2196  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2197  }
2198  // If there was already a canonical specialization, merge into it.
2199  if (CanonSpec != D) {
2200  mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2201 
2202  // This declaration might be a definition. Merge with any existing
2203  // definition.
2204  if (auto *DDD = D->DefinitionData) {
2205  if (CanonSpec->DefinitionData)
2206  MergeDefinitionData(CanonSpec, std::move(*DDD));
2207  else
2208  CanonSpec->DefinitionData = D->DefinitionData;
2209  }
2210  D->DefinitionData = CanonSpec->DefinitionData;
2211  }
2212  }
2213  }
2214 
2215  // Explicit info.
2216  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2217  auto *ExplicitInfo =
2218  new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2219  ExplicitInfo->TypeAsWritten = TyInfo;
2220  ExplicitInfo->ExternLoc = ReadSourceLocation();
2221  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2222  D->ExplicitInfo = ExplicitInfo;
2223  }
2224 
2225  return Redecl;
2226 }
2227 
2230  RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2231 
2232  D->TemplateParams = Record.readTemplateParameterList();
2233  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2234 
2235  // These are read/set from/to the first declaration.
2236  if (ThisDeclID == Redecl.getFirstID()) {
2237  D->InstantiatedFromMember.setPointer(
2238  ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2239  D->InstantiatedFromMember.setInt(Record.readInt());
2240  }
2241 }
2242 
2245  VisitDecl(D);
2246  D->Specialization = ReadDeclAs<CXXMethodDecl>();
2247 }
2248 
2250  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2251 
2252  if (ThisDeclID == Redecl.getFirstID()) {
2253  // This FunctionTemplateDecl owns a CommonPtr; read it.
2255  ReadDeclIDList(SpecIDs);
2257  }
2258 }
2259 
2260 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2261 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2262 /// VarTemplate(Partial)SpecializationDecl with a new data
2263 /// structure Template(Partial)SpecializationDecl, and
2264 /// using Template(Partial)SpecializationDecl as input type.
2265 ASTDeclReader::RedeclarableResult
2268  RedeclarableResult Redecl = VisitVarDeclImpl(D);
2269 
2270  ASTContext &C = Reader.getContext();
2271  if (Decl *InstD = ReadDecl()) {
2272  if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2273  D->SpecializedTemplate = VTD;
2274  } else {
2276  Record.readTemplateArgumentList(TemplArgs);
2278  C, TemplArgs);
2279  auto *PS =
2280  new (C)
2281  VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2282  PS->PartialSpecialization =
2283  cast<VarTemplatePartialSpecializationDecl>(InstD);
2284  PS->TemplateArgs = ArgList;
2285  D->SpecializedTemplate = PS;
2286  }
2287  }
2288 
2289  // Explicit info.
2290  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2291  auto *ExplicitInfo =
2292  new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2293  ExplicitInfo->TypeAsWritten = TyInfo;
2294  ExplicitInfo->ExternLoc = ReadSourceLocation();
2295  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2296  D->ExplicitInfo = ExplicitInfo;
2297  }
2298 
2300  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2301  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2302  D->PointOfInstantiation = ReadSourceLocation();
2303  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2304  D->IsCompleteDefinition = Record.readInt();
2305 
2306  bool writtenAsCanonicalDecl = Record.readInt();
2307  if (writtenAsCanonicalDecl) {
2308  auto *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2309  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2310  // FIXME: If it's already present, merge it.
2311  if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2312  CanonPattern->getCommonPtr()->PartialSpecializations
2313  .GetOrInsertNode(Partial);
2314  } else {
2315  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2316  }
2317  }
2318  }
2319 
2320  return Redecl;
2321 }
2322 
2323 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2324 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2325 /// VarTemplate(Partial)SpecializationDecl with a new data
2326 /// structure Template(Partial)SpecializationDecl, and
2327 /// using Template(Partial)SpecializationDecl as input type.
2330  RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2331 
2332  D->TemplateParams = Record.readTemplateParameterList();
2333  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2334 
2335  // These are read/set from/to the first declaration.
2336  if (ThisDeclID == Redecl.getFirstID()) {
2337  D->InstantiatedFromMember.setPointer(
2338  ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2339  D->InstantiatedFromMember.setInt(Record.readInt());
2340  }
2341 }
2342 
2344  VisitTypeDecl(D);
2345 
2346  D->setDeclaredWithTypename(Record.readInt());
2347 
2348  if (Record.readInt())
2349  D->setDefaultArgument(GetTypeSourceInfo());
2350 }
2351 
2353  VisitDeclaratorDecl(D);
2354  // TemplateParmPosition.
2355  D->setDepth(Record.readInt());
2356  D->setPosition(Record.readInt());
2357  if (D->isExpandedParameterPack()) {
2358  auto TypesAndInfos =
2359  D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2360  for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2361  new (&TypesAndInfos[I].first) QualType(Record.readType());
2362  TypesAndInfos[I].second = GetTypeSourceInfo();
2363  }
2364  } else {
2365  // Rest of NonTypeTemplateParmDecl.
2366  D->ParameterPack = Record.readInt();
2367  if (Record.readInt())
2368  D->setDefaultArgument(Record.readExpr());
2369  }
2370 }
2371 
2373  VisitTemplateDecl(D);
2374  // TemplateParmPosition.
2375  D->setDepth(Record.readInt());
2376  D->setPosition(Record.readInt());
2377  if (D->isExpandedParameterPack()) {
2378  auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2379  for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2380  I != N; ++I)
2381  Data[I] = Record.readTemplateParameterList();
2382  } else {
2383  // Rest of TemplateTemplateParmDecl.
2384  D->ParameterPack = Record.readInt();
2385  if (Record.readInt())
2386  D->setDefaultArgument(Reader.getContext(),
2387  Record.readTemplateArgumentLoc());
2388  }
2389 }
2390 
2392  VisitRedeclarableTemplateDecl(D);
2393 }
2394 
2396  VisitDecl(D);
2397  D->AssertExprAndFailed.setPointer(Record.readExpr());
2398  D->AssertExprAndFailed.setInt(Record.readInt());
2399  D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2400  D->RParenLoc = ReadSourceLocation();
2401 }
2402 
2404  VisitDecl(D);
2405 }
2406 
2407 std::pair<uint64_t, uint64_t>
2409  uint64_t LexicalOffset = ReadLocalOffset();
2410  uint64_t VisibleOffset = ReadLocalOffset();
2411  return std::make_pair(LexicalOffset, VisibleOffset);
2412 }
2413 
2414 template <typename T>
2415 ASTDeclReader::RedeclarableResult
2417  DeclID FirstDeclID = ReadDeclID();
2418  Decl *MergeWith = nullptr;
2419 
2420  bool IsKeyDecl = ThisDeclID == FirstDeclID;
2421  bool IsFirstLocalDecl = false;
2422 
2423  uint64_t RedeclOffset = 0;
2424 
2425  // 0 indicates that this declaration was the only declaration of its entity,
2426  // and is used for space optimization.
2427  if (FirstDeclID == 0) {
2428  FirstDeclID = ThisDeclID;
2429  IsKeyDecl = true;
2430  IsFirstLocalDecl = true;
2431  } else if (unsigned N = Record.readInt()) {
2432  // This declaration was the first local declaration, but may have imported
2433  // other declarations.
2434  IsKeyDecl = N == 1;
2435  IsFirstLocalDecl = true;
2436 
2437  // We have some declarations that must be before us in our redeclaration
2438  // chain. Read them now, and remember that we ought to merge with one of
2439  // them.
2440  // FIXME: Provide a known merge target to the second and subsequent such
2441  // declaration.
2442  for (unsigned I = 0; I != N - 1; ++I)
2443  MergeWith = ReadDecl();
2444 
2445  RedeclOffset = ReadLocalOffset();
2446  } else {
2447  // This declaration was not the first local declaration. Read the first
2448  // local declaration now, to trigger the import of other redeclarations.
2449  (void)ReadDecl();
2450  }
2451 
2452  auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2453  if (FirstDecl != D) {
2454  // We delay loading of the redeclaration chain to avoid deeply nested calls.
2455  // We temporarily set the first (canonical) declaration as the previous one
2456  // which is the one that matters and mark the real previous DeclID to be
2457  // loaded & attached later on.
2459  D->First = FirstDecl->getCanonicalDecl();
2460  }
2461 
2462  auto *DAsT = static_cast<T *>(D);
2463 
2464  // Note that we need to load local redeclarations of this decl and build a
2465  // decl chain for them. This must happen *after* we perform the preloading
2466  // above; this ensures that the redeclaration chain is built in the correct
2467  // order.
2468  if (IsFirstLocalDecl)
2469  Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2470 
2471  return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2472 }
2473 
2474 /// Attempts to merge the given declaration (D) with another declaration
2475 /// of the same entity.
2476 template<typename T>
2478  RedeclarableResult &Redecl,
2479  DeclID TemplatePatternID) {
2480  // If modules are not available, there is no reason to perform this merge.
2481  if (!Reader.getContext().getLangOpts().Modules)
2482  return;
2483 
2484  // If we're not the canonical declaration, we don't need to merge.
2485  if (!DBase->isFirstDecl())
2486  return;
2487 
2488  auto *D = static_cast<T *>(DBase);
2489 
2490  if (auto *Existing = Redecl.getKnownMergeTarget())
2491  // We already know of an existing declaration we should merge with.
2492  mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2493  else if (FindExistingResult ExistingRes = findExisting(D))
2494  if (T *Existing = ExistingRes)
2495  mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2496 }
2497 
2498 /// "Cast" to type T, asserting if we don't have an implicit conversion.
2499 /// We use this to put code in a template that will only be valid for certain
2500 /// instantiations.
2501 template<typename T> static T assert_cast(T t) { return t; }
2502 template<typename T> static T assert_cast(...) {
2503  llvm_unreachable("bad assert_cast");
2504 }
2505 
2506 /// Merge together the pattern declarations from two template
2507 /// declarations.
2509  RedeclarableTemplateDecl *Existing,
2510  DeclID DsID, bool IsKeyDecl) {
2511  auto *DPattern = D->getTemplatedDecl();
2512  auto *ExistingPattern = Existing->getTemplatedDecl();
2513  RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2514  DPattern->getCanonicalDecl()->getGlobalID(),
2515  IsKeyDecl);
2516 
2517  if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2518  // Merge with any existing definition.
2519  // FIXME: This is duplicated in several places. Refactor.
2520  auto *ExistingClass =
2521  cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2522  if (auto *DDD = DClass->DefinitionData) {
2523  if (ExistingClass->DefinitionData) {
2524  MergeDefinitionData(ExistingClass, std::move(*DDD));
2525  } else {
2526  ExistingClass->DefinitionData = DClass->DefinitionData;
2527  // We may have skipped this before because we thought that DClass
2528  // was the canonical declaration.
2529  Reader.PendingDefinitions.insert(DClass);
2530  }
2531  }
2532  DClass->DefinitionData = ExistingClass->DefinitionData;
2533 
2534  return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2535  Result);
2536  }
2537  if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2538  return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2539  Result);
2540  if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2541  return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2542  if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2543  return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2544  Result);
2545  llvm_unreachable("merged an unknown kind of redeclarable template");
2546 }
2547 
2548 /// Attempts to merge the given declaration (D) with another declaration
2549 /// of the same entity.
2550 template<typename T>
2552  RedeclarableResult &Redecl,
2553  DeclID TemplatePatternID) {
2554  auto *D = static_cast<T *>(DBase);
2555  T *ExistingCanon = Existing->getCanonicalDecl();
2556  T *DCanon = D->getCanonicalDecl();
2557  if (ExistingCanon != DCanon) {
2558  assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2559  "already merged this declaration");
2560 
2561  // Have our redeclaration link point back at the canonical declaration
2562  // of the existing declaration, so that this declaration has the
2563  // appropriate canonical declaration.
2564  D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2565  D->First = ExistingCanon;
2566  ExistingCanon->Used |= D->Used;
2567  D->Used = false;
2568 
2569  // When we merge a namespace, update its pointer to the first namespace.
2570  // We cannot have loaded any redeclarations of this declaration yet, so
2571  // there's nothing else that needs to be updated.
2572  if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2573  Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2574  assert_cast<NamespaceDecl*>(ExistingCanon));
2575 
2576  // When we merge a template, merge its pattern.
2577  if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2578  mergeTemplatePattern(
2579  DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2580  TemplatePatternID, Redecl.isKeyDecl());
2581 
2582  // If this declaration is a key declaration, make a note of that.
2583  if (Redecl.isKeyDecl())
2584  Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2585  }
2586 }
2587 
2588 /// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2589 /// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2590 /// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2591 /// that some types are mergeable during deserialization, otherwise name
2592 /// lookup fails. This is the case for EnumConstantDecl.
2594  if (!ND)
2595  return false;
2596  // TODO: implement merge for other necessary decls.
2597  if (isa<EnumConstantDecl>(ND))
2598  return true;
2599  return false;
2600 }
2601 
2602 /// Attempts to merge the given declaration (D) with another declaration
2603 /// of the same entity, for the case where the entity is not actually
2604 /// redeclarable. This happens, for instance, when merging the fields of
2605 /// identical class definitions from two different modules.
2606 template<typename T>
2608  // If modules are not available, there is no reason to perform this merge.
2609  if (!Reader.getContext().getLangOpts().Modules)
2610  return;
2611 
2612  // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2613  // Note that C identically-named things in different translation units are
2614  // not redeclarations, but may still have compatible types, where ODR-like
2615  // semantics may apply.
2616  if (!Reader.getContext().getLangOpts().CPlusPlus &&
2617  !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2618  return;
2619 
2620  if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2621  if (T *Existing = ExistingRes)
2622  Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2623  Existing->getCanonicalDecl());
2624 }
2625 
2627  VisitDecl(D);
2628  unsigned NumVars = D->varlist_size();
2630  Vars.reserve(NumVars);
2631  for (unsigned i = 0; i != NumVars; ++i) {
2632  Vars.push_back(Record.readExpr());
2633  }
2634  D->setVars(Vars);
2635 }
2636 
2638  VisitDecl(D);
2639  unsigned NumVars = D->varlist_size();
2640  unsigned NumClauses = D->clauselist_size();
2642  Vars.reserve(NumVars);
2643  for (unsigned i = 0; i != NumVars; ++i) {
2644  Vars.push_back(Record.readExpr());
2645  }
2646  D->setVars(Vars);
2648  Clauses.reserve(NumClauses);
2649  OMPClauseReader ClauseReader(Record);
2650  for (unsigned I = 0; I != NumClauses; ++I)
2651  Clauses.push_back(ClauseReader.readClause());
2652  D->setClauses(Clauses);
2653 }
2654 
2656  VisitDecl(D);
2657  unsigned NumClauses = D->clauselist_size();
2659  Clauses.reserve(NumClauses);
2660  OMPClauseReader ClauseReader(Record);
2661  for (unsigned I = 0; I != NumClauses; ++I)
2662  Clauses.push_back(ClauseReader.readClause());
2663  D->setClauses(Clauses);
2664 }
2665 
2667  VisitValueDecl(D);
2668  D->setLocation(ReadSourceLocation());
2669  Expr *In = Record.readExpr();
2670  Expr *Out = Record.readExpr();
2671  D->setCombinerData(In, Out);
2672  Expr *Combiner = Record.readExpr();
2673  D->setCombiner(Combiner);
2674  Expr *Orig = Record.readExpr();
2675  Expr *Priv = Record.readExpr();
2676  D->setInitializerData(Orig, Priv);
2677  Expr *Init = Record.readExpr();
2678  auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2679  D->setInitializer(Init, IK);
2680  D->PrevDeclInScope = ReadDeclID();
2681 }
2682 
2684  VisitValueDecl(D);
2685  D->setLocation(ReadSourceLocation());
2686  Expr *MapperVarRefE = Record.readExpr();
2687  D->setMapperVarRef(MapperVarRefE);
2688  D->VarName = Record.readDeclarationName();
2689  D->PrevDeclInScope = ReadDeclID();
2690  unsigned NumClauses = D->clauselist_size();
2692  Clauses.reserve(NumClauses);
2693  OMPClauseReader ClauseReader(Record);
2694  for (unsigned I = 0; I != NumClauses; ++I)
2695  Clauses.push_back(ClauseReader.readClause());
2696  D->setClauses(Clauses);
2697 }
2698 
2700  VisitVarDecl(D);
2701 }
2702 
2703 //===----------------------------------------------------------------------===//
2704 // Attribute Reading
2705 //===----------------------------------------------------------------------===//
2706 
2707 namespace {
2708 class AttrReader {
2709  ModuleFile *F;
2710  ASTReader *Reader;
2711  const ASTReader::RecordData &Record;
2712  unsigned &Idx;
2713 
2714 public:
2715  AttrReader(ModuleFile &F, ASTReader &Reader,
2716  const ASTReader::RecordData &Record, unsigned &Idx)
2717  : F(&F), Reader(&Reader), Record(Record), Idx(Idx) {}
2718 
2719  const uint64_t &readInt() { return Record[Idx++]; }
2720 
2721  SourceRange readSourceRange() {
2722  return Reader->ReadSourceRange(*F, Record, Idx);
2723  }
2724 
2725  Expr *readExpr() { return Reader->ReadExpr(*F); }
2726 
2727  std::string readString() {
2728  return Reader->ReadString(Record, Idx);
2729  }
2730 
2731  TypeSourceInfo *getTypeSourceInfo() {
2732  return Reader->GetTypeSourceInfo(*F, Record, Idx);
2733  }
2734 
2735  IdentifierInfo *getIdentifierInfo() {
2736  return Reader->GetIdentifierInfo(*F, Record, Idx);
2737  }
2738 
2739  VersionTuple readVersionTuple() {
2740  return ASTReader::ReadVersionTuple(Record, Idx);
2741  }
2742 
2743  template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2744  return cast_or_null<T>(Reader->GetLocalDecl(*F, LocalID));
2745  }
2746 };
2747 }
2748 
2750  unsigned &Idx) {
2751  AttrReader Record(M, *this, Rec, Idx);
2752  auto V = Record.readInt();
2753  if (!V)
2754  return nullptr;
2755 
2756  Attr *New = nullptr;
2757  // Kind is stored as a 1-based integer because 0 is used to indicate a null
2758  // Attr pointer.
2759  auto Kind = static_cast<attr::Kind>(V - 1);
2760  SourceRange Range = Record.readSourceRange();
2761  ASTContext &Context = getContext();
2762 
2763 #include "clang/Serialization/AttrPCHRead.inc"
2764 
2765  assert(New && "Unable to decode attribute?");
2766  return New;
2767 }
2768 
2769 /// Reads attributes from the current stream position.
2771  for (unsigned I = 0, E = Record.readInt(); I != E; ++I)
2772  Attrs.push_back(Record.readAttr());
2773 }
2774 
2775 //===----------------------------------------------------------------------===//
2776 // ASTReader Implementation
2777 //===----------------------------------------------------------------------===//
2778 
2779 /// Note that we have loaded the declaration with the given
2780 /// Index.
2781 ///
2782 /// This routine notes that this declaration has already been loaded,
2783 /// so that future GetDecl calls will return this declaration rather
2784 /// than trying to load a new declaration.
2785 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2786  assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2787  DeclsLoaded[Index] = D;
2788 }
2789 
2790 /// Determine whether the consumer will be interested in seeing
2791 /// this declaration (via HandleTopLevelDecl).
2792 ///
2793 /// This routine should return true for anything that might affect
2794 /// code generation, e.g., inline function definitions, Objective-C
2795 /// declarations with metadata, etc.
2796 static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2797  // An ObjCMethodDecl is never considered as "interesting" because its
2798  // implementation container always is.
2799 
2800  // An ImportDecl or VarDecl imported from a module map module will get
2801  // emitted when we import the relevant module.
2803  auto *M = D->getImportedOwningModule();
2804  if (M && M->Kind == Module::ModuleMapModule &&
2805  Ctx.DeclMustBeEmitted(D))
2806  return false;
2807  }
2808 
2809  if (isa<FileScopeAsmDecl>(D) ||
2810  isa<ObjCProtocolDecl>(D) ||
2811  isa<ObjCImplDecl>(D) ||
2812  isa<ImportDecl>(D) ||
2813  isa<PragmaCommentDecl>(D) ||
2814  isa<PragmaDetectMismatchDecl>(D))
2815  return true;
2816  if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D) ||
2817  isa<OMPDeclareMapperDecl>(D) || isa<OMPAllocateDecl>(D))
2818  return !D->getDeclContext()->isFunctionOrMethod();
2819  if (const auto *Var = dyn_cast<VarDecl>(D))
2820  return Var->isFileVarDecl() &&
2821  (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2822  OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2823  if (const auto *Func = dyn_cast<FunctionDecl>(D))
2824  return Func->doesThisDeclarationHaveABody() || HasBody;
2825 
2826  if (auto *ES = D->getASTContext().getExternalSource())
2827  if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2828  return true;
2829 
2830  return false;
2831 }
2832 
2833 /// Get the correct cursor and offset for loading a declaration.
2834 ASTReader::RecordLocation
2835 ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2836  GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2837  assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2838  ModuleFile *M = I->second;
2839  const DeclOffset &DOffs =
2840  M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2841  Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2842  return RecordLocation(M, DOffs.BitOffset);
2843 }
2844 
2845 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2846  auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2847 
2848  assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2849  return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2850 }
2851 
2852 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2853  return LocalOffset + M.GlobalBitOffset;
2854 }
2855 
2857  const TemplateParameterList *Y);
2858 
2859 /// Determine whether two template parameters are similar enough
2860 /// that they may be used in declarations of the same template.
2861 static bool isSameTemplateParameter(const NamedDecl *X,
2862  const NamedDecl *Y) {
2863  if (X->getKind() != Y->getKind())
2864  return false;
2865 
2866  if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2867  const auto *TY = cast<TemplateTypeParmDecl>(Y);
2868  return TX->isParameterPack() == TY->isParameterPack();
2869  }
2870 
2871  if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2872  const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2873  return TX->isParameterPack() == TY->isParameterPack() &&
2874  TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2875  }
2876 
2877  const auto *TX = cast<TemplateTemplateParmDecl>(X);
2878  const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2879  return TX->isParameterPack() == TY->isParameterPack() &&
2880  isSameTemplateParameterList(TX->getTemplateParameters(),
2881  TY->getTemplateParameters());
2882 }
2883 
2885  if (auto *NS = X->getAsNamespace())
2886  return NS;
2887  if (auto *NAS = X->getAsNamespaceAlias())
2888  return NAS->getNamespace();
2889  return nullptr;
2890 }
2891 
2893  const NestedNameSpecifier *Y) {
2894  if (auto *NSX = getNamespace(X)) {
2895  auto *NSY = getNamespace(Y);
2896  if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2897  return false;
2898  } else if (X->getKind() != Y->getKind())
2899  return false;
2900 
2901  // FIXME: For namespaces and types, we're permitted to check that the entity
2902  // is named via the same tokens. We should probably do so.
2903  switch (X->getKind()) {
2905  if (X->getAsIdentifier() != Y->getAsIdentifier())
2906  return false;
2907  break;
2910  // We've already checked that we named the same namespace.
2911  break;
2914  if (X->getAsType()->getCanonicalTypeInternal() !=
2916  return false;
2917  break;
2920  return true;
2921  }
2922 
2923  // Recurse into earlier portion of NNS, if any.
2924  auto *PX = X->getPrefix();
2925  auto *PY = Y->getPrefix();
2926  if (PX && PY)
2927  return isSameQualifier(PX, PY);
2928  return !PX && !PY;
2929 }
2930 
2931 /// Determine whether two template parameter lists are similar enough
2932 /// that they may be used in declarations of the same template.
2934  const TemplateParameterList *Y) {
2935  if (X->size() != Y->size())
2936  return false;
2937 
2938  for (unsigned I = 0, N = X->size(); I != N; ++I)
2939  if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2940  return false;
2941 
2942  return true;
2943 }
2944 
2945 /// Determine whether the attributes we can overload on are identical for A and
2946 /// B. Will ignore any overloadable attrs represented in the type of A and B.
2948  const FunctionDecl *B) {
2949  // Note that pass_object_size attributes are represented in the function's
2950  // ExtParameterInfo, so we don't need to check them here.
2951 
2952  llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2953  auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
2954  auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
2955 
2956  for (auto Pair : zip_longest(AEnableIfAttrs, BEnableIfAttrs)) {
2957  Optional<EnableIfAttr *> Cand1A = std::get<0>(Pair);
2958  Optional<EnableIfAttr *> Cand2A = std::get<1>(Pair);
2959 
2960  // Return false if the number of enable_if attributes is different.
2961  if (!Cand1A || !Cand2A)
2962  return false;
2963 
2964  Cand1ID.clear();
2965  Cand2ID.clear();
2966 
2967  (*Cand1A)->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2968  (*Cand2A)->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2969 
2970  // Return false if any of the enable_if expressions of A and B are
2971  // different.
2972  if (Cand1ID != Cand2ID)
2973  return false;
2974  }
2975  return true;
2976 }
2977 
2978 /// Determine whether the two declarations refer to the same entity.
2979 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2980  assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2981 
2982  if (X == Y)
2983  return true;
2984 
2985  // Must be in the same context.
2986  //
2987  // Note that we can't use DeclContext::Equals here, because the DeclContexts
2988  // could be two different declarations of the same function. (We will fix the
2989  // semantic DC to refer to the primary definition after merging.)
2990  if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
2991  cast<Decl>(Y->getDeclContext()->getRedeclContext())))
2992  return false;
2993 
2994  // Two typedefs refer to the same entity if they have the same underlying
2995  // type.
2996  if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
2997  if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2998  return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2999  TypedefY->getUnderlyingType());
3000 
3001  // Must have the same kind.
3002  if (X->getKind() != Y->getKind())
3003  return false;
3004 
3005  // Objective-C classes and protocols with the same name always match.
3006  if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
3007  return true;
3008 
3009  if (isa<ClassTemplateSpecializationDecl>(X)) {
3010  // No need to handle these here: we merge them when adding them to the
3011  // template.
3012  return false;
3013  }
3014 
3015  // Compatible tags match.
3016  if (const auto *TagX = dyn_cast<TagDecl>(X)) {
3017  const auto *TagY = cast<TagDecl>(Y);
3018  return (TagX->getTagKind() == TagY->getTagKind()) ||
3019  ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
3020  TagX->getTagKind() == TTK_Interface) &&
3021  (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
3022  TagY->getTagKind() == TTK_Interface));
3023  }
3024 
3025  // Functions with the same type and linkage match.
3026  // FIXME: This needs to cope with merging of prototyped/non-prototyped
3027  // functions, etc.
3028  if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
3029  const auto *FuncY = cast<FunctionDecl>(Y);
3030  if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
3031  const auto *CtorY = cast<CXXConstructorDecl>(Y);
3032  if (CtorX->getInheritedConstructor() &&
3033  !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
3034  CtorY->getInheritedConstructor().getConstructor()))
3035  return false;
3036  }
3037 
3038  if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
3039  return false;
3040 
3041  // Multiversioned functions with different feature strings are represented
3042  // as separate declarations.
3043  if (FuncX->isMultiVersion()) {
3044  const auto *TAX = FuncX->getAttr<TargetAttr>();
3045  const auto *TAY = FuncY->getAttr<TargetAttr>();
3046  assert(TAX && TAY && "Multiversion Function without target attribute");
3047 
3048  if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
3049  return false;
3050  }
3051 
3052  ASTContext &C = FuncX->getASTContext();
3053  auto GetTypeAsWritten = [](const FunctionDecl *FD) {
3054  // Map to the first declaration that we've already merged into this one.
3055  // The TSI of redeclarations might not match (due to calling conventions
3056  // being inherited onto the type but not the TSI), but the TSI type of
3057  // the first declaration of the function should match across modules.
3058  FD = FD->getCanonicalDecl();
3059  return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3060  : FD->getType();
3061  };
3062  QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3063  if (!C.hasSameType(XT, YT)) {
3064  // We can get functions with different types on the redecl chain in C++17
3065  // if they have differing exception specifications and at least one of
3066  // the excpetion specs is unresolved.
3067  auto *XFPT = XT->getAs<FunctionProtoType>();
3068  auto *YFPT = YT->getAs<FunctionProtoType>();
3069  if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3070  (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3073  return true;
3074  return false;
3075  }
3076  return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3077  hasSameOverloadableAttrs(FuncX, FuncY);
3078  }
3079 
3080  // Variables with the same type and linkage match.
3081  if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3082  const auto *VarY = cast<VarDecl>(Y);
3083  if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3084  ASTContext &C = VarX->getASTContext();
3085  if (C.hasSameType(VarX->getType(), VarY->getType()))
3086  return true;
3087 
3088  // We can get decls with different types on the redecl chain. Eg.
3089  // template <typename T> struct S { static T Var[]; }; // #1
3090  // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3091  // Only? happens when completing an incomplete array type. In this case
3092  // when comparing #1 and #2 we should go through their element type.
3093  const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3094  const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3095  if (!VarXTy || !VarYTy)
3096  return false;
3097  if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3098  return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3099  }
3100  return false;
3101  }
3102 
3103  // Namespaces with the same name and inlinedness match.
3104  if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3105  const auto *NamespaceY = cast<NamespaceDecl>(Y);
3106  return NamespaceX->isInline() == NamespaceY->isInline();
3107  }
3108 
3109  // Identical template names and kinds match if their template parameter lists
3110  // and patterns match.
3111  if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3112  const auto *TemplateY = cast<TemplateDecl>(Y);
3113  return isSameEntity(TemplateX->getTemplatedDecl(),
3114  TemplateY->getTemplatedDecl()) &&
3115  isSameTemplateParameterList(TemplateX->getTemplateParameters(),
3116  TemplateY->getTemplateParameters());
3117  }
3118 
3119  // Fields with the same name and the same type match.
3120  if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3121  const auto *FDY = cast<FieldDecl>(Y);
3122  // FIXME: Also check the bitwidth is odr-equivalent, if any.
3123  return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3124  }
3125 
3126  // Indirect fields with the same target field match.
3127  if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3128  const auto *IFDY = cast<IndirectFieldDecl>(Y);
3129  return IFDX->getAnonField()->getCanonicalDecl() ==
3130  IFDY->getAnonField()->getCanonicalDecl();
3131  }
3132 
3133  // Enumerators with the same name match.
3134  if (isa<EnumConstantDecl>(X))
3135  // FIXME: Also check the value is odr-equivalent.
3136  return true;
3137 
3138  // Using shadow declarations with the same target match.
3139  if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3140  const auto *USY = cast<UsingShadowDecl>(Y);
3141  return USX->getTargetDecl() == USY->getTargetDecl();
3142  }
3143 
3144  // Using declarations with the same qualifier match. (We already know that
3145  // the name matches.)
3146  if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3147  const auto *UY = cast<UsingDecl>(Y);
3148  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3149  UX->hasTypename() == UY->hasTypename() &&
3150  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3151  }
3152  if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3153  const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3154  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3155  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3156  }
3157  if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3158  return isSameQualifier(
3159  UX->getQualifier(),
3160  cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3161 
3162  // Namespace alias definitions with the same target match.
3163  if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3164  const auto *NAY = cast<NamespaceAliasDecl>(Y);
3165  return NAX->getNamespace()->Equals(NAY->getNamespace());
3166  }
3167 
3168  return false;
3169 }
3170 
3171 /// Find the context in which we should search for previous declarations when
3172 /// looking for declarations to merge.
3173 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3174  DeclContext *DC) {
3175  if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3176  return ND->getOriginalNamespace();
3177 
3178  if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3179  // Try to dig out the definition.
3180  auto *DD = RD->DefinitionData;
3181  if (!DD)
3182  DD = RD->getCanonicalDecl()->DefinitionData;
3183 
3184  // If there's no definition yet, then DC's definition is added by an update
3185  // record, but we've not yet loaded that update record. In this case, we
3186  // commit to DC being the canonical definition now, and will fix this when
3187  // we load the update record.
3188  if (!DD) {
3189  DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3190  RD->setCompleteDefinition(true);
3191  RD->DefinitionData = DD;
3192  RD->getCanonicalDecl()->DefinitionData = DD;
3193 
3194  // Track that we did this horrible thing so that we can fix it later.
3195  Reader.PendingFakeDefinitionData.insert(
3196  std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3197  }
3198 
3199  return DD->Definition;
3200  }
3201 
3202  if (auto *ED = dyn_cast<EnumDecl>(DC))
3203  return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3204  : nullptr;
3205 
3206  // We can see the TU here only if we have no Sema object. In that case,
3207  // there's no TU scope to look in, so using the DC alone is sufficient.
3208  if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3209  return TU;
3210 
3211  return nullptr;
3212 }
3213 
3214 ASTDeclReader::FindExistingResult::~FindExistingResult() {
3215  // Record that we had a typedef name for linkage whether or not we merge
3216  // with that declaration.
3217  if (TypedefNameForLinkage) {
3218  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3219  Reader.ImportedTypedefNamesForLinkage.insert(
3220  std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3221  return;
3222  }
3223 
3224  if (!AddResult || Existing)
3225  return;
3226 
3227  DeclarationName Name = New->getDeclName();
3228  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3230  setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3231  AnonymousDeclNumber, New);
3232  } else if (DC->isTranslationUnit() &&
3233  !Reader.getContext().getLangOpts().CPlusPlus) {
3234  if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3235  Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3236  .push_back(New);
3237  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3238  // Add the declaration to its redeclaration context so later merging
3239  // lookups will find it.
3240  MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3241  }
3242 }
3243 
3244 /// Find the declaration that should be merged into, given the declaration found
3245 /// by name lookup. If we're merging an anonymous declaration within a typedef,
3246 /// we need a matching typedef, and we merge with the type inside it.
3248  bool IsTypedefNameForLinkage) {
3249  if (!IsTypedefNameForLinkage)
3250  return Found;
3251 
3252  // If we found a typedef declaration that gives a name to some other
3253  // declaration, then we want that inner declaration. Declarations from
3254  // AST files are handled via ImportedTypedefNamesForLinkage.
3255  if (Found->isFromASTFile())
3256  return nullptr;
3257 
3258  if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3259  return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3260 
3261  return nullptr;
3262 }
3263 
3264 /// Find the declaration to use to populate the anonymous declaration table
3265 /// for the given lexical DeclContext. We only care about finding local
3266 /// definitions of the context; we'll merge imported ones as we go.
3267 DeclContext *
3268 ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3269  // For classes, we track the definition as we merge.
3270  if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3271  auto *DD = RD->getCanonicalDecl()->DefinitionData;
3272  return DD ? DD->Definition : nullptr;
3273  }
3274 
3275  // For anything else, walk its merged redeclarations looking for a definition.
3276  // Note that we can't just call getDefinition here because the redeclaration
3277  // chain isn't wired up.
3278  for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3279  if (auto *FD = dyn_cast<FunctionDecl>(D))
3280  if (FD->isThisDeclarationADefinition())
3281  return FD;
3282  if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3283  if (MD->isThisDeclarationADefinition())
3284  return MD;
3285  }
3286 
3287  // No merged definition yet.
3288  return nullptr;
3289 }
3290 
3291 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3292  DeclContext *DC,
3293  unsigned Index) {
3294  // If the lexical context has been merged, look into the now-canonical
3295  // definition.
3296  auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3297 
3298  // If we've seen this before, return the canonical declaration.
3299  auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3300  if (Index < Previous.size() && Previous[Index])
3301  return Previous[Index];
3302 
3303  // If this is the first time, but we have parsed a declaration of the context,
3304  // build the anonymous declaration list from the parsed declaration.
3305  auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3306  if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3307  numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3308  if (Previous.size() == Number)
3309  Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3310  else
3311  Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3312  });
3313  }
3314 
3315  return Index < Previous.size() ? Previous[Index] : nullptr;
3316 }
3317 
3318 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3319  DeclContext *DC, unsigned Index,
3320  NamedDecl *D) {
3321  auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3322 
3323  auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3324  if (Index >= Previous.size())
3325  Previous.resize(Index + 1);
3326  if (!Previous[Index])
3327  Previous[Index] = D;
3328 }
3329 
3330 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3331  DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3332  : D->getDeclName();
3333 
3334  if (!Name && !needsAnonymousDeclarationNumber(D)) {
3335  // Don't bother trying to find unnamed declarations that are in
3336  // unmergeable contexts.
3337  FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3338  AnonymousDeclNumber, TypedefNameForLinkage);
3339  Result.suppress();
3340  return Result;
3341  }
3342 
3344  if (TypedefNameForLinkage) {
3345  auto It = Reader.ImportedTypedefNamesForLinkage.find(
3346  std::make_pair(DC, TypedefNameForLinkage));
3347  if (It != Reader.ImportedTypedefNamesForLinkage.end())
3348  if (isSameEntity(It->second, D))
3349  return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3350  TypedefNameForLinkage);
3351  // Go on to check in other places in case an existing typedef name
3352  // was not imported.
3353  }
3354 
3356  // This is an anonymous declaration that we may need to merge. Look it up
3357  // in its context by number.
3358  if (auto *Existing = getAnonymousDeclForMerging(
3359  Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3360  if (isSameEntity(Existing, D))
3361  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3362  TypedefNameForLinkage);
3363  } else if (DC->isTranslationUnit() &&
3364  !Reader.getContext().getLangOpts().CPlusPlus) {
3365  IdentifierResolver &IdResolver = Reader.getIdResolver();
3366 
3367  // Temporarily consider the identifier to be up-to-date. We don't want to
3368  // cause additional lookups here.
3369  class UpToDateIdentifierRAII {
3370  IdentifierInfo *II;
3371  bool WasOutToDate = false;
3372 
3373  public:
3374  explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3375  if (II) {
3376  WasOutToDate = II->isOutOfDate();
3377  if (WasOutToDate)
3378  II->setOutOfDate(false);
3379  }
3380  }
3381 
3382  ~UpToDateIdentifierRAII() {
3383  if (WasOutToDate)
3384  II->setOutOfDate(true);
3385  }
3386  } UpToDate(Name.getAsIdentifierInfo());
3387 
3388  for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3389  IEnd = IdResolver.end();
3390  I != IEnd; ++I) {
3391  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3392  if (isSameEntity(Existing, D))
3393  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3394  TypedefNameForLinkage);
3395  }
3396  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3397  DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3398  for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3399  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3400  if (isSameEntity(Existing, D))
3401  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3402  TypedefNameForLinkage);
3403  }
3404  } else {
3405  // Not in a mergeable context.
3406  return FindExistingResult(Reader);
3407  }
3408 
3409  // If this declaration is from a merged context, make a note that we need to
3410  // check that the canonical definition of that context contains the decl.
3411  //
3412  // FIXME: We should do something similar if we merge two definitions of the
3413  // same template specialization into the same CXXRecordDecl.
3414  auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3415  if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3416  MergedDCIt->second == D->getDeclContext())
3417  Reader.PendingOdrMergeChecks.push_back(D);
3418 
3419  return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3420  AnonymousDeclNumber, TypedefNameForLinkage);
3421 }
3422 
3423 template<typename DeclT>
3425  return D->RedeclLink.getLatestNotUpdated();
3426 }
3427 
3429  llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3430 }
3431 
3433  assert(D);
3434 
3435  switch (D->getKind()) {
3436 #define ABSTRACT_DECL(TYPE)
3437 #define DECL(TYPE, BASE) \
3438  case Decl::TYPE: \
3439  return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3440 #include "clang/AST/DeclNodes.inc"
3441  }
3442  llvm_unreachable("unknown decl kind");
3443 }
3444 
3445 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3447 }
3448 
3449 template<typename DeclT>
3452  Decl *Previous, Decl *Canon) {
3453  D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3454  D->First = cast<DeclT>(Previous)->First;
3455 }
3456 
3457 namespace clang {
3458 
3459 template<>
3462  Decl *Previous, Decl *Canon) {
3463  auto *VD = static_cast<VarDecl *>(D);
3464  auto *PrevVD = cast<VarDecl>(Previous);
3465  D->RedeclLink.setPrevious(PrevVD);
3466  D->First = PrevVD->First;
3467 
3468  // We should keep at most one definition on the chain.
3469  // FIXME: Cache the definition once we've found it. Building a chain with
3470  // N definitions currently takes O(N^2) time here.
3471  if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3472  for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3473  if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3474  Reader.mergeDefinitionVisibility(CurD, VD);
3475  VD->demoteThisDefinitionToDeclaration();
3476  break;
3477  }
3478  }
3479  }
3480 }
3481 
3483  auto *DT = T->getContainedDeducedType();
3484  return DT && !DT->isDeduced();
3485 }
3486 
3487 template<>
3490  Decl *Previous, Decl *Canon) {
3491  auto *FD = static_cast<FunctionDecl *>(D);
3492  auto *PrevFD = cast<FunctionDecl>(Previous);
3493 
3494  FD->RedeclLink.setPrevious(PrevFD);
3495  FD->First = PrevFD->First;
3496 
3497  // If the previous declaration is an inline function declaration, then this
3498  // declaration is too.
3499  if (PrevFD->isInlined() != FD->isInlined()) {
3500  // FIXME: [dcl.fct.spec]p4:
3501  // If a function with external linkage is declared inline in one
3502  // translation unit, it shall be declared inline in all translation
3503  // units in which it appears.
3504  //
3505  // Be careful of this case:
3506  //
3507  // module A:
3508  // template<typename T> struct X { void f(); };
3509  // template<typename T> inline void X<T>::f() {}
3510  //
3511  // module B instantiates the declaration of X<int>::f
3512  // module C instantiates the definition of X<int>::f
3513  //
3514  // If module B and C are merged, we do not have a violation of this rule.
3515  FD->setImplicitlyInline(true);
3516  }
3517 
3518  auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3519  auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3520  if (FPT && PrevFPT) {
3521  // If we need to propagate an exception specification along the redecl
3522  // chain, make a note of that so that we can do so later.
3523  bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3524  bool WasUnresolved =
3526  if (IsUnresolved != WasUnresolved)
3527  Reader.PendingExceptionSpecUpdates.insert(
3528  {Canon, IsUnresolved ? PrevFD : FD});
3529 
3530  // If we need to propagate a deduced return type along the redecl chain,
3531  // make a note of that so that we can do it later.
3532  bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3533  bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3534  if (IsUndeduced != WasUndeduced)
3535  Reader.PendingDeducedTypeUpdates.insert(
3536  {cast<FunctionDecl>(Canon),
3537  (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3538  }
3539 }
3540 
3541 } // namespace clang
3542 
3544  llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3545 }
3546 
3547 /// Inherit the default template argument from \p From to \p To. Returns
3548 /// \c false if there is no default template for \p From.
3549 template <typename ParmDecl>
3550 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3551  Decl *ToD) {
3552  auto *To = cast<ParmDecl>(ToD);
3553  if (!From->hasDefaultArgument())
3554  return false;
3555  To->setInheritedDefaultArgument(Context, From);
3556  return true;
3557 }
3558 
3560  TemplateDecl *From,
3561  TemplateDecl *To) {
3562  auto *FromTP = From->getTemplateParameters();
3563  auto *ToTP = To->getTemplateParameters();
3564  assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3565 
3566  for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3567  NamedDecl *FromParam = FromTP->getParam(I);
3568  NamedDecl *ToParam = ToTP->getParam(I);
3569 
3570  if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3571  inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3572  else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3573  inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3574  else
3576  Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3577  }
3578 }
3579 
3581  Decl *Previous, Decl *Canon) {
3582  assert(D && Previous);
3583 
3584  switch (D->getKind()) {
3585 #define ABSTRACT_DECL(TYPE)
3586 #define DECL(TYPE, BASE) \
3587  case Decl::TYPE: \
3588  attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3589  break;
3590 #include "clang/AST/DeclNodes.inc"
3591  }
3592 
3593  // If the declaration was visible in one module, a redeclaration of it in
3594  // another module remains visible even if it wouldn't be visible by itself.
3595  //
3596  // FIXME: In this case, the declaration should only be visible if a module
3597  // that makes it visible has been imported.
3598  D->IdentifierNamespace |=
3599  Previous->IdentifierNamespace &
3601 
3602  // If the declaration declares a template, it may inherit default arguments
3603  // from the previous declaration.
3604  if (auto *TD = dyn_cast<TemplateDecl>(D))
3606  cast<TemplateDecl>(Previous), TD);
3607 }
3608 
3609 template<typename DeclT>
3611  D->RedeclLink.setLatest(cast<DeclT>(Latest));
3612 }
3613 
3615  llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3616 }
3617 
3619  assert(D && Latest);
3620 
3621  switch (D->getKind()) {
3622 #define ABSTRACT_DECL(TYPE)
3623 #define DECL(TYPE, BASE) \
3624  case Decl::TYPE: \
3625  attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3626  break;
3627 #include "clang/AST/DeclNodes.inc"
3628  }
3629 }
3630 
3631 template<typename DeclT>
3633  D->RedeclLink.markIncomplete();
3634 }
3635 
3637  llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3638 }
3639 
3640 void ASTReader::markIncompleteDeclChain(Decl *D) {
3641  switch (D->getKind()) {
3642 #define ABSTRACT_DECL(TYPE)
3643 #define DECL(TYPE, BASE) \
3644  case Decl::TYPE: \
3645  ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3646  break;
3647 #include "clang/AST/DeclNodes.inc"
3648  }
3649 }
3650 
3651 /// Read the declaration at the given offset from the AST file.
3652 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3653  unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3654  SourceLocation DeclLoc;
3655  RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3656  llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3657  // Keep track of where we are in the stream, then jump back there
3658  // after reading this declaration.
3659  SavedStreamPosition SavedPosition(DeclsCursor);
3660 
3661  ReadingKindTracker ReadingKind(Read_Decl, *this);
3662 
3663  // Note that we are loading a declaration record.
3664  Deserializing ADecl(this);
3665 
3666  DeclsCursor.JumpToBit(Loc.Offset);
3667  ASTRecordReader Record(*this, *Loc.F);
3668  ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3669  unsigned Code = DeclsCursor.ReadCode();
3670 
3671  ASTContext &Context = getContext();
3672  Decl *D = nullptr;
3673  switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3674  case DECL_CONTEXT_LEXICAL:
3675  case DECL_CONTEXT_VISIBLE:
3676  llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3677  case DECL_TYPEDEF:
3678  D = TypedefDecl::CreateDeserialized(Context, ID);
3679  break;
3680  case DECL_TYPEALIAS:
3681  D = TypeAliasDecl::CreateDeserialized(Context, ID);
3682  break;
3683  case DECL_ENUM:
3684  D = EnumDecl::CreateDeserialized(Context, ID);
3685  break;
3686  case DECL_RECORD:
3687  D = RecordDecl::CreateDeserialized(Context, ID);
3688  break;
3689  case DECL_ENUM_CONSTANT:
3690  D = EnumConstantDecl::CreateDeserialized(Context, ID);
3691  break;
3692  case DECL_FUNCTION:
3693  D = FunctionDecl::CreateDeserialized(Context, ID);
3694  break;
3695  case DECL_LINKAGE_SPEC:
3696  D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3697  break;
3698  case DECL_EXPORT:
3699  D = ExportDecl::CreateDeserialized(Context, ID);
3700  break;
3701  case DECL_LABEL:
3702  D = LabelDecl::CreateDeserialized(Context, ID);
3703  break;
3704  case DECL_NAMESPACE:
3705  D = NamespaceDecl::CreateDeserialized(Context, ID);
3706  break;
3707  case DECL_NAMESPACE_ALIAS:
3708  D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3709  break;
3710  case DECL_USING:
3711  D = UsingDecl::CreateDeserialized(Context, ID);
3712  break;
3713  case DECL_USING_PACK:
3714  D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3715  break;
3716  case DECL_USING_SHADOW:
3717  D = UsingShadowDecl::CreateDeserialized(Context, ID);
3718  break;
3721  break;
3722  case DECL_USING_DIRECTIVE:
3723  D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3724  break;
3727  break;
3730  break;
3731  case DECL_CXX_RECORD:
3732  D = CXXRecordDecl::CreateDeserialized(Context, ID);
3733  break;
3736  break;
3737  case DECL_CXX_METHOD:
3738  D = CXXMethodDecl::CreateDeserialized(Context, ID);
3739  break;
3740  case DECL_CXX_CONSTRUCTOR:
3741  D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3742  break;
3744  D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3745  break;
3746  case DECL_CXX_DESTRUCTOR:
3747  D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3748  break;
3749  case DECL_CXX_CONVERSION:
3750  D = CXXConversionDecl::CreateDeserialized(Context, ID);
3751  break;
3752  case DECL_ACCESS_SPEC:
3753  D = AccessSpecDecl::CreateDeserialized(Context, ID);
3754  break;
3755  case DECL_FRIEND:
3756  D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3757  break;
3758  case DECL_FRIEND_TEMPLATE:
3759  D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3760  break;
3761  case DECL_CLASS_TEMPLATE:
3762  D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3763  break;
3766  break;
3769  break;
3770  case DECL_VAR_TEMPLATE:
3771  D = VarTemplateDecl::CreateDeserialized(Context, ID);
3772  break;
3775  break;
3778  break;
3781  break;
3784  break;
3787  break;
3790  break;
3793  Record.readInt());
3794  break;
3797  break;
3800  Record.readInt());
3801  break;
3804  break;
3805  case DECL_STATIC_ASSERT:
3806  D = StaticAssertDecl::CreateDeserialized(Context, ID);
3807  break;
3808  case DECL_OBJC_METHOD:
3809  D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3810  break;
3811  case DECL_OBJC_INTERFACE:
3812  D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3813  break;
3814  case DECL_OBJC_IVAR:
3815  D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3816  break;
3817  case DECL_OBJC_PROTOCOL:
3818  D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3819  break;
3821  D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3822  break;
3823  case DECL_OBJC_CATEGORY:
3824  D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3825  break;
3828  break;
3831  break;
3834  break;
3835  case DECL_OBJC_PROPERTY:
3836  D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3837  break;
3840  break;
3841  case DECL_FIELD:
3842  D = FieldDecl::CreateDeserialized(Context, ID);
3843  break;
3844  case DECL_INDIRECTFIELD:
3845  D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3846  break;
3847  case DECL_VAR:
3848  D = VarDecl::CreateDeserialized(Context, ID);
3849  break;
3850  case DECL_IMPLICIT_PARAM:
3851  D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3852  break;
3853  case DECL_PARM_VAR:
3854  D = ParmVarDecl::CreateDeserialized(Context, ID);
3855  break;
3856  case DECL_DECOMPOSITION:
3857  D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3858  break;
3859  case DECL_BINDING:
3860  D = BindingDecl::CreateDeserialized(Context, ID);
3861  break;
3862  case DECL_FILE_SCOPE_ASM:
3863  D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3864  break;
3865  case DECL_BLOCK:
3866  D = BlockDecl::CreateDeserialized(Context, ID);
3867  break;
3868  case DECL_MS_PROPERTY:
3869  D = MSPropertyDecl::CreateDeserialized(Context, ID);
3870  break;
3871  case DECL_CAPTURED:
3872  D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3873  break;
3875  Error("attempt to read a C++ base-specifier record as a declaration");
3876  return nullptr;
3878  Error("attempt to read a C++ ctor initializer record as a declaration");
3879  return nullptr;
3880  case DECL_IMPORT:
3881  // Note: last entry of the ImportDecl record is the number of stored source
3882  // locations.
3883  D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3884  break;
3886  D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3887  break;
3888  case DECL_OMP_ALLOCATE: {
3889  unsigned NumVars = Record.readInt();
3890  unsigned NumClauses = Record.readInt();
3891  D = OMPAllocateDecl::CreateDeserialized(Context, ID, NumVars, NumClauses);
3892  break;
3893  }
3894  case DECL_OMP_REQUIRES:
3895  D = OMPRequiresDecl::CreateDeserialized(Context, ID, Record.readInt());
3896  break;
3899  break;
3901  D = OMPDeclareMapperDecl::CreateDeserialized(Context, ID, Record.readInt());
3902  break;
3903  case DECL_OMP_CAPTUREDEXPR:
3904  D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3905  break;
3906  case DECL_PRAGMA_COMMENT:
3907  D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3908  break;
3911  Record.readInt());
3912  break;
3913  case DECL_EMPTY:
3914  D = EmptyDecl::CreateDeserialized(Context, ID);
3915  break;
3916  case DECL_OBJC_TYPE_PARAM:
3917  D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3918  break;
3919  }
3920 
3921  assert(D && "Unknown declaration reading AST file");
3922  LoadedDecl(Index, D);
3923  // Set the DeclContext before doing any deserialization, to make sure internal
3924  // calls to Decl::getASTContext() by Decl's methods will find the
3925  // TranslationUnitDecl without crashing.
3926  D->setDeclContext(Context.getTranslationUnitDecl());
3927  Reader.Visit(D);
3928 
3929  // If this declaration is also a declaration context, get the
3930  // offsets for its tables of lexical and visible declarations.
3931  if (auto *DC = dyn_cast<DeclContext>(D)) {
3932  std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3933  if (Offsets.first &&
3934  ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3935  return nullptr;
3936  if (Offsets.second &&
3937  ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3938  return nullptr;
3939  }
3940  assert(Record.getIdx() == Record.size());
3941 
3942  // Load any relevant update records.
3943  PendingUpdateRecords.push_back(
3944  PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3945 
3946  // Load the categories after recursive loading is finished.
3947  if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3948  // If we already have a definition when deserializing the ObjCInterfaceDecl,
3949  // we put the Decl in PendingDefinitions so we can pull the categories here.
3950  if (Class->isThisDeclarationADefinition() ||
3951  PendingDefinitions.count(Class))
3952  loadObjCCategories(ID, Class);
3953 
3954  // If we have deserialized a declaration that has a definition the
3955  // AST consumer might need to know about, queue it.
3956  // We don't pass it to the consumer immediately because we may be in recursive
3957  // loading, and some declarations may still be initializing.
3958  PotentiallyInterestingDecls.push_back(
3959  InterestingDecl(D, Reader.hasPendingBody()));
3960 
3961  return D;
3962 }
3963 
3964 void ASTReader::PassInterestingDeclsToConsumer() {
3965  assert(Consumer);
3966 
3967  if (PassingDeclsToConsumer)
3968  return;
3969 
3970  // Guard variable to avoid recursively redoing the process of passing
3971  // decls to consumer.
3972  SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3973  true);
3974 
3975  // Ensure that we've loaded all potentially-interesting declarations
3976  // that need to be eagerly loaded.
3977  for (auto ID : EagerlyDeserializedDecls)
3978  GetDecl(ID);
3979  EagerlyDeserializedDecls.clear();
3980 
3981  while (!PotentiallyInterestingDecls.empty()) {
3982  InterestingDecl D = PotentiallyInterestingDecls.front();
3983  PotentiallyInterestingDecls.pop_front();
3984  if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3985  PassInterestingDeclToConsumer(D.getDecl());
3986  }
3987 }
3988 
3989 void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3990  // The declaration may have been modified by files later in the chain.
3991  // If this is the case, read the record containing the updates from each file
3992  // and pass it to ASTDeclReader to make the modifications.
3993  serialization::GlobalDeclID ID = Record.ID;
3994  Decl *D = Record.D;
3995  ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3996  DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3997 
3998  SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3999 
4000  if (UpdI != DeclUpdateOffsets.end()) {
4001  auto UpdateOffsets = std::move(UpdI->second);
4002  DeclUpdateOffsets.erase(UpdI);
4003 
4004  // Check if this decl was interesting to the consumer. If we just loaded
4005  // the declaration, then we know it was interesting and we skip the call
4006  // to isConsumerInterestedIn because it is unsafe to call in the
4007  // current ASTReader state.
4008  bool WasInteresting =
4009  Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
4010  for (auto &FileAndOffset : UpdateOffsets) {
4011  ModuleFile *F = FileAndOffset.first;
4012  uint64_t Offset = FileAndOffset.second;
4013  llvm::BitstreamCursor &Cursor = F->DeclsCursor;
4014  SavedStreamPosition SavedPosition(Cursor);
4015  Cursor.JumpToBit(Offset);
4016  unsigned Code = Cursor.ReadCode();
4017  ASTRecordReader Record(*this, *F);
4018  unsigned RecCode = Record.readRecord(Cursor, Code);
4019  (void)RecCode;
4020  assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
4021 
4022  ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4023  SourceLocation());
4024  Reader.UpdateDecl(D, PendingLazySpecializationIDs);
4025 
4026  // We might have made this declaration interesting. If so, remember that
4027  // we need to hand it off to the consumer.
4028  if (!WasInteresting &&
4029  isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
4030  PotentiallyInterestingDecls.push_back(
4031  InterestingDecl(D, Reader.hasPendingBody()));
4032  WasInteresting = true;
4033  }
4034  }
4035  }
4036  // Add the lazy specializations to the template.
4037  assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||
4038  isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&
4039  "Must not have pending specializations");
4040  if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
4041  ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
4042  else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4043  ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
4044  else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4045  ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4046  PendingLazySpecializationIDs.clear();
4047 
4048  // Load the pending visible updates for this decl context, if it has any.
4049  auto I = PendingVisibleUpdates.find(ID);
4050  if (I != PendingVisibleUpdates.end()) {
4051  auto VisibleUpdates = std::move(I->second);
4052  PendingVisibleUpdates.erase(I);
4053 
4054  auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4055  for (const auto &Update : VisibleUpdates)
4056  Lookups[DC].Table.add(
4057  Update.Mod, Update.Data,
4059  DC->setHasExternalVisibleStorage(true);
4060  }
4061 }
4062 
4063 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4064  // Attach FirstLocal to the end of the decl chain.
4065  Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4066  if (FirstLocal != CanonDecl) {
4067  Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4069  *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4070  CanonDecl);
4071  }
4072 
4073  if (!LocalOffset) {
4074  ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4075  return;
4076  }
4077 
4078  // Load the list of other redeclarations from this module file.
4079  ModuleFile *M = getOwningModuleFile(FirstLocal);
4080  assert(M && "imported decl from no module file");
4081 
4082  llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4083  SavedStreamPosition SavedPosition(Cursor);
4084  Cursor.JumpToBit(LocalOffset);
4085 
4086  RecordData Record;
4087  unsigned Code = Cursor.ReadCode();
4088  unsigned RecCode = Cursor.readRecord(Code, Record);
4089  (void)RecCode;
4090  assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
4091 
4092  // FIXME: We have several different dispatches on decl kind here; maybe
4093  // we should instead generate one loop per kind and dispatch up-front?
4094  Decl *MostRecent = FirstLocal;
4095  for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4096  auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4097  ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4098  MostRecent = D;
4099  }
4100  ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4101 }
4102 
4103 namespace {
4104 
4105  /// Given an ObjC interface, goes through the modules and links to the
4106  /// interface all the categories for it.
4107  class ObjCCategoriesVisitor {
4108  ASTReader &Reader;
4109  ObjCInterfaceDecl *Interface;
4110  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4111  ObjCCategoryDecl *Tail = nullptr;
4112  llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4113  serialization::GlobalDeclID InterfaceID;
4114  unsigned PreviousGeneration;
4115 
4116  void add(ObjCCategoryDecl *Cat) {
4117  // Only process each category once.
4118  if (!Deserialized.erase(Cat))
4119  return;
4120 
4121  // Check for duplicate categories.
4122  if (Cat->getDeclName()) {
4123  ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4124  if (Existing &&
4125  Reader.getOwningModuleFile(Existing)
4126  != Reader.getOwningModuleFile(Cat)) {
4127  // FIXME: We should not warn for duplicates in diamond:
4128  //
4129  // MT //
4130  // / \ //
4131  // ML MR //
4132  // \ / //
4133  // MB //
4134  //
4135  // If there are duplicates in ML/MR, there will be warning when
4136  // creating MB *and* when importing MB. We should not warn when
4137  // importing.
4138  Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4139  << Interface->getDeclName() << Cat->getDeclName();
4140  Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4141  } else if (!Existing) {
4142  // Record this category.
4143  Existing = Cat;
4144  }
4145  }
4146 
4147  // Add this category to the end of the chain.
4148  if (Tail)
4150  else
4151  Interface->setCategoryListRaw(Cat);
4152  Tail = Cat;
4153  }
4154 
4155  public:
4156  ObjCCategoriesVisitor(ASTReader &Reader,
4157  ObjCInterfaceDecl *Interface,
4158  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4159  serialization::GlobalDeclID InterfaceID,
4160  unsigned PreviousGeneration)
4161  : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4162  InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4163  // Populate the name -> category map with the set of known categories.
4164  for (auto *Cat : Interface->known_categories()) {
4165  if (Cat->getDeclName())
4166  NameCategoryMap[Cat->getDeclName()] = Cat;
4167 
4168  // Keep track of the tail of the category list.
4169  Tail = Cat;
4170  }
4171  }
4172 
4173  bool operator()(ModuleFile &M) {
4174  // If we've loaded all of the category information we care about from
4175  // this module file, we're done.
4176  if (M.Generation <= PreviousGeneration)
4177  return true;
4178 
4179  // Map global ID of the definition down to the local ID used in this
4180  // module file. If there is no such mapping, we'll find nothing here
4181  // (or in any module it imports).
4182  DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4183  if (!LocalID)
4184  return true;
4185 
4186  // Perform a binary search to find the local redeclarations for this
4187  // declaration (if any).
4188  const ObjCCategoriesInfo Compare = { LocalID, 0 };
4189  const ObjCCategoriesInfo *Result
4190  = std::lower_bound(M.ObjCCategoriesMap,
4192  Compare);
4193  if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4194  Result->DefinitionID != LocalID) {
4195  // We didn't find anything. If the class definition is in this module
4196  // file, then the module files it depends on cannot have any categories,
4197  // so suppress further lookup.
4198  return Reader.isDeclIDFromModule(InterfaceID, M);
4199  }
4200 
4201  // We found something. Dig out all of the categories.
4202  unsigned Offset = Result->Offset;
4203  unsigned N = M.ObjCCategories[Offset];
4204  M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4205  for (unsigned I = 0; I != N; ++I)
4206  add(cast_or_null<ObjCCategoryDecl>(
4207  Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4208  return true;
4209  }
4210  };
4211 
4212 } // namespace
4213 
4214 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4215  ObjCInterfaceDecl *D,
4216  unsigned PreviousGeneration) {
4217  ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4218  PreviousGeneration);
4219  ModuleMgr.visit(Visitor);
4220 }
4221 
4222 template<typename DeclT, typename Fn>
4223 static void forAllLaterRedecls(DeclT *D, Fn F) {
4224  F(D);
4225 
4226  // Check whether we've already merged D into its redeclaration chain.
4227  // MostRecent may or may not be nullptr if D has not been merged. If
4228  // not, walk the merged redecl chain and see if it's there.
4229  auto *MostRecent = D->getMostRecentDecl();
4230  bool Found = false;
4231  for (auto *Redecl = MostRecent; Redecl && !Found;
4232  Redecl = Redecl->getPreviousDecl())
4233  Found = (Redecl == D);
4234 
4235  // If this declaration is merged, apply the functor to all later decls.
4236  if (Found) {
4237  for (auto *Redecl = MostRecent; Redecl != D;
4238  Redecl = Redecl->getPreviousDecl())
4239  F(Redecl);
4240  }
4241 }
4242 
4244  llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4245  while (Record.getIdx() < Record.size()) {
4246  switch ((DeclUpdateKind)Record.readInt()) {
4248  auto *RD = cast<CXXRecordDecl>(D);
4249  // FIXME: If we also have an update record for instantiating the
4250  // definition of D, we need that to happen before we get here.
4251  Decl *MD = Record.readDecl();
4252  assert(MD && "couldn't read decl from update record");
4253  // FIXME: We should call addHiddenDecl instead, to add the member
4254  // to its DeclContext.
4255  RD->addedMember(MD);
4256  break;
4257  }
4258 
4260  // It will be added to the template's lazy specialization set.
4261  PendingLazySpecializationIDs.push_back(ReadDeclID());
4262  break;
4263 
4265  auto *Anon = ReadDeclAs<NamespaceDecl>();
4266 
4267  // Each module has its own anonymous namespace, which is disjoint from
4268  // any other module's anonymous namespaces, so don't attach the anonymous
4269  // namespace at all.
4270  if (!Record.isModule()) {
4271  if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4272  TU->setAnonymousNamespace(Anon);
4273  else
4274  cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4275  }
4276  break;
4277  }
4278 
4280  auto *VD = cast<VarDecl>(D);
4281  VD->NonParmVarDeclBits.IsInline = Record.readInt();
4282  VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4283  uint64_t Val = Record.readInt();
4284  if (Val && !VD->getInit()) {
4285  VD->setInit(Record.readExpr());
4286  if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4287  EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4288  Eval->CheckedICE = true;
4289  Eval->IsICE = Val == 3;
4290  }
4291  }
4292  break;
4293  }
4294 
4296  SourceLocation POI = Record.readSourceLocation();
4297  if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4298  VTSD->setPointOfInstantiation(POI);
4299  } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4300  VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4301  } else {
4302  auto *FD = cast<FunctionDecl>(D);
4303  if (auto *FTSInfo = FD->TemplateOrSpecialization
4304  .dyn_cast<FunctionTemplateSpecializationInfo *>())
4305  FTSInfo->setPointOfInstantiation(POI);
4306  else
4307  FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4308  ->setPointOfInstantiation(POI);
4309  }
4310  break;
4311  }
4312 
4314  auto *Param = cast<ParmVarDecl>(D);
4315 
4316  // We have to read the default argument regardless of whether we use it
4317  // so that hypothetical further update records aren't messed up.
4318  // TODO: Add a function to skip over the next expr record.
4319  auto *DefaultArg = Record.readExpr();
4320 
4321  // Only apply the update if the parameter still has an uninstantiated
4322  // default argument.
4323  if (Param->hasUninstantiatedDefaultArg())
4324  Param->setDefaultArg(DefaultArg);
4325  break;
4326  }
4327 
4329  auto *FD = cast<FieldDecl>(D);
4330  auto *DefaultInit = Record.readExpr();
4331 
4332  // Only apply the update if the field still has an uninstantiated
4333  // default member initializer.
4334  if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4335  if (DefaultInit)
4336  FD->setInClassInitializer(DefaultInit);
4337  else
4338  // Instantiation failed. We can get here if we serialized an AST for
4339  // an invalid program.
4340  FD->removeInClassInitializer();
4341  }
4342  break;
4343  }
4344 
4346  auto *FD = cast<FunctionDecl>(D);
4347  if (Reader.PendingBodies[FD]) {
4348  // FIXME: Maybe check for ODR violations.
4349  // It's safe to stop now because this update record is always last.
4350  return;
4351  }
4352 
4353  if (Record.readInt()) {
4354  // Maintain AST consistency: any later redeclarations of this function
4355  // are inline if this one is. (We might have merged another declaration
4356  // into this one.)
4357  forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4358  FD->setImplicitlyInline();
4359  });
4360  }
4361  FD->setInnerLocStart(ReadSourceLocation());
4362  ReadFunctionDefinition(FD);
4363  assert(Record.getIdx() == Record.size() && "lazy body must be last");
4364  break;
4365  }
4366 
4368  auto *RD = cast<CXXRecordDecl>(D);
4369  auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4370  bool HadRealDefinition =
4371  OldDD && (OldDD->Definition != RD ||
4372  !Reader.PendingFakeDefinitionData.count(OldDD));
4373  RD->setParamDestroyedInCallee(Record.readInt());
4374  RD->setArgPassingRestrictions(
4375  (RecordDecl::ArgPassingKind)Record.readInt());
4376  ReadCXXRecordDefinition(RD, /*Update*/true);
4377 
4378  // Visible update is handled separately.
4379  uint64_t LexicalOffset = ReadLocalOffset();
4380  if (!HadRealDefinition && LexicalOffset) {
4381  Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4382  Reader.PendingFakeDefinitionData.erase(OldDD);
4383  }
4384 
4385  auto TSK = (TemplateSpecializationKind)Record.readInt();
4386  SourceLocation POI = ReadSourceLocation();
4387  if (MemberSpecializationInfo *MSInfo =
4388  RD->getMemberSpecializationInfo()) {
4389  MSInfo->setTemplateSpecializationKind(TSK);
4390  MSInfo->setPointOfInstantiation(POI);
4391  } else {
4392  auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4393  Spec->setTemplateSpecializationKind(TSK);
4394  Spec->setPointOfInstantiation(POI);
4395 
4396  if (Record.readInt()) {
4397  auto *PartialSpec =
4398  ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4400  Record.readTemplateArgumentList(TemplArgs);
4401  auto *TemplArgList = TemplateArgumentList::CreateCopy(
4402  Reader.getContext(), TemplArgs);
4403 
4404  // FIXME: If we already have a partial specialization set,
4405  // check that it matches.
4406  if (!Spec->getSpecializedTemplateOrPartial()
4408  Spec->setInstantiationOf(PartialSpec, TemplArgList);
4409  }
4410  }
4411 
4412  RD->setTagKind((TagTypeKind)Record.readInt());
4413  RD->setLocation(ReadSourceLocation());
4414  RD->setLocStart(ReadSourceLocation());
4415  RD->setBraceRange(ReadSourceRange());
4416 
4417  if (Record.readInt()) {
4418  AttrVec Attrs;
4419  Record.readAttributes(Attrs);
4420  // If the declaration already has attributes, we assume that some other
4421  // AST file already loaded them.
4422  if (!D->hasAttrs())
4423  D->setAttrsImpl(Attrs, Reader.getContext());
4424  }
4425  break;
4426  }
4427 
4429  // Set the 'operator delete' directly to avoid emitting another update
4430  // record.
4431  auto *Del = ReadDeclAs<FunctionDecl>();
4432  auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4433  auto *ThisArg = Record.readExpr();
4434  // FIXME: Check consistency if we have an old and new operator delete.
4435  if (!First->OperatorDelete) {
4436  First->OperatorDelete = Del;
4437  First->OperatorDeleteThisArg = ThisArg;
4438  }
4439  break;
4440  }
4441 
4444  SmallVector<QualType, 8> ExceptionStorage;
4445  Record.readExceptionSpec(ExceptionStorage, ESI);
4446 
4447  // Update this declaration's exception specification, if needed.
4448  auto *FD = cast<FunctionDecl>(D);
4449  auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4450  // FIXME: If the exception specification is already present, check that it
4451  // matches.
4452  if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4453  FD->setType(Reader.getContext().getFunctionType(
4454  FPT->getReturnType(), FPT->getParamTypes(),
4455  FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4456 
4457  // When we get to the end of deserializing, see if there are other decls
4458  // that we need to propagate this exception specification onto.
4459  Reader.PendingExceptionSpecUpdates.insert(
4460  std::make_pair(FD->getCanonicalDecl(), FD));
4461  }
4462  break;
4463  }
4464 
4466  auto *FD = cast<FunctionDecl>(D);
4467  QualType DeducedResultType = Record.readType();
4468  Reader.PendingDeducedTypeUpdates.insert(
4469  {FD->getCanonicalDecl(), DeducedResultType});
4470  break;
4471  }
4472 
4473  case UPD_DECL_MARKED_USED:
4474  // Maintain AST consistency: any later redeclarations are used too.
4475  D->markUsed(Reader.getContext());
4476  break;
4477 
4478  case UPD_MANGLING_NUMBER:
4479  Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4480  Record.readInt());
4481  break;
4482 
4484  Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4485  Record.readInt());
4486  break;
4487 
4489  D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4490  ReadSourceRange()));
4491  break;
4492 
4494  auto AllocatorKind =
4495  static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
4496  Expr *Allocator = Record.readExpr();
4497  SourceRange SR = ReadSourceRange();
4498  D->addAttr(OMPAllocateDeclAttr::CreateImplicit(
4499  Reader.getContext(), AllocatorKind, Allocator, SR));
4500  break;
4501  }
4502 
4503  case UPD_DECL_EXPORTED: {
4504  unsigned SubmoduleID = readSubmoduleID();
4505  auto *Exported = cast<NamedDecl>(D);
4506  Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4507  Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4508  Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4509  break;
4510  }
4511 
4513  D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4514  Reader.getContext(),
4515  static_cast<OMPDeclareTargetDeclAttr::MapTypeTy>(Record.readInt()),
4516  ReadSourceRange()));
4517  break;
4518 
4520  AttrVec Attrs;
4521  Record.readAttributes(Attrs);
4522  assert(Attrs.size() == 1);
4523  D->addAttr(Attrs[0]);
4524  break;
4525  }
4526  }
4527 }
const uint64_t & readInt()
Returns the current value in this record, and advances to the next value.
Definition: ASTReader.h:2401
RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD)
void VisitTypeDecl(TypeDecl *TD)
void setCategoryNameLoc(SourceLocation Loc)
Definition: DeclObjC.h: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:1838
SourceLocation readSourceLocation()
Read a source location, advancing Idx.
Definition: ASTReader.h:2598
void VisitClassScopeFunctionSpecializationDecl(ClassScopeFunctionSpecializationDecl *D)
static const Decl * getCanonicalDecl(const Decl *D)
void setImplicit(bool I=true)
Definition: DeclBase.h:551
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:4697
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
void VisitImportDecl(ImportDecl *D)
A (possibly-)qualified type.
Definition: Type.h:639
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:1938
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:3367
This represents &#39;#pragma omp allocate ...&#39; directive.
Definition: DeclOpenMP.h:422
static void setNextObjCCategory(ObjCCategoryDecl *Cat, ObjCCategoryDecl *Next)
bool IsICE
Whether this statement is an integral constant expression, or in C++11, whether the statement is a co...
Definition: Decl.h:801
RedeclarableResult VisitClassTemplateSpecializationDeclImpl(ClassTemplateSpecializationDecl *D)
An instance of this object exists for each enum constant that is defined.
Definition: Decl.h: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:4101
Microsoft&#39;s &#39;__super&#39; specifier, stored as a CXXRecordDecl* of the class it appeared in...
unsigned clauselist_size() const
Definition: DeclOpenMP.h:488
An OMPDeclareReductionDecl record.
Definition: ASTBitCodes.h:1547
void VisitEnumConstantDecl(EnumConstantDecl *ECD)
static PragmaCommentDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned ArgSize)
Definition: Decl.cpp:4351
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:8483
Defines the clang::Module class, which describes a module in the source code.
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
static NamedDecl * getDeclForMerging(NamedDecl *Found, bool IsTypedefNameForLinkage)
Find the declaration that should be merged into, given the declaration found by name lookup...
A VarTemplatePartialSpecializationDecl record.
Definition: ASTBitCodes.h: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:2760
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:4265
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:4289
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:2824
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:2544
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:4484
QualType getElementType() const
Definition: Type.h:2859
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:1541
An UnresolvedUsingTypenameDecl record.
Definition: ASTBitCodes.h:1421
An identifier, stored as an IdentifierInfo*.
void setNothrow(bool Nothrow=true)
Definition: Decl.cpp:4494
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:4097
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:1535
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6768
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:5048
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:183
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:2416
Represents the builtin template declaration which is used to implement __make_integer_seq and other b...
RedeclarableResult VisitTagDecl(TagDecl *TD)
iterator begin(DeclarationName Name)
begin - Returns an iterator for decls with the name &#39;Name&#39;.
static void attachPreviousDeclImpl(ASTReader &Reader, Redeclarable< DeclT > *D, Decl *Previous, Decl *Canon)
Types, declared with &#39;struct foo&#39;, typedefs, etc.
Definition: DeclBase.h:131
A CXXConstructorDecl record for an inherited constructor.
Definition: ASTBitCodes.h: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:2520
void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D)
void mergeRedeclarable(Redeclarable< T > *D, RedeclarableResult &Redecl, DeclID TemplatePatternID=0)
Attempts to merge the given declaration (D) with another declaration of the same entity.
static OMPThreadPrivateDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned N)
Definition: DeclOpenMP.cpp:40
void setManglingNumber(const NamedDecl *ND, unsigned Number)
void setUninstantiatedDefaultArg(Expr *arg)
Definition: Decl.cpp:2623
static IndirectFieldDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4530
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:1190
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:776
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:2664
static NamespaceDecl * getNamespace(const NestedNameSpecifier *X)
void setOwningModuleID(unsigned ID)
Set the owning module ID.
Definition: DeclBase.h:626
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:327
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:2482
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:2391
static OMPCapturedExprDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclOpenMP.cpp:241
iterator end()
end - Returns an iterator that has &#39;finished&#39;.
static VersionTuple ReadVersionTuple(const RecordData &Record, unsigned &Idx)
Read a version tuple.
Definition: ASTReader.cpp:9126
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:6782
< 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:2307
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:2603
void setClassInterface(ObjCInterfaceDecl *D)
Definition: DeclObjC.h:2748
bool isPartOfPerModuleInitializer(const Decl *D)
Determine whether the given declaration will be included in the per-module initializer if it needs to...
Definition: ASTCommon.h:116
CXXRecordDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:727
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1161
static FileScopeAsmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4632
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:4602
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:824
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:4050
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:2565
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:3356
void setInitVal(const llvm::APSInt &V)
Definition: Decl.h:2809
Ordinary names.
Definition: DeclBase.h:145
void setInitExpr(Expr *E)
Definition: Decl.h:2808
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:399
void setLocStart(SourceLocation L)
Definition: Decl.h:2901
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:873
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:9104
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:1613
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:2043
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:534
unsigned varlist_size() const
Definition: DeclOpenMP.h:486
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:3699
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:115
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:1709
An ObjCTypeParamDecl record.
Definition: ASTBitCodes.h:1532
void VisitDecl(Decl *D)
A record containing CXXBaseSpecifiers.
Definition: ASTBitCodes.h:1496
DiagnosticBuilder Diag(unsigned DiagID) const
Report a diagnostic.
Definition: ASTReader.cpp:9145
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:879
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:6831
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:2218
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:725
void setContextParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4119
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:430
SourceRange ReadSourceRange(ModuleFile &F, const RecordData &Record, unsigned &Idx)
Read a source range.
Definition: ASTReader.cpp:9074
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:2510
NonTypeTemplateParmDecl - Declares a non-type template parameter, e.g., "Size" in.
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:2435
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:2189
IdentifierInfo * getAsIdentifierInfo() const
Retrieve the IdentifierInfo * stored in this declaration name, or null if this declaration name isn&#39;t...
const uint64_t & back() const
The last element in this record.
Definition: ASTReader.h:2397
A CXXDestructorDecl record.
Definition: ASTBitCodes.h: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:1813
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:422
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:2623
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:704
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
static OMPAllocateDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NVars, unsigned NClauses)
Definition: DeclOpenMP.cpp:74
void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D)
void VisitObjCProtocolDecl(ObjCProtocolDecl *D)
A ObjCCompatibleAliasDecl record.
Definition: ASTBitCodes.h:1336
void setHasExternalVisibleStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:2343
Attr * ReadAttr(ModuleFile &M, const RecordData &Record, unsigned &Idx)
Reads one attribute from the current stream position.
bool hasAttrs() const
Definition: DeclBase.h:476
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:3790
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:4377
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:4220
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:5045
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:4504
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:4644
QualType getReturnType() const
Definition: Type.h:3625
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:589
static TemplateTemplateParmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:787
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:580
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:2537
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:2041
bool isDeclIDFromModule(serialization::GlobalDeclID ID, ModuleFile &M) const
Returns true if global DeclID ID originated from module M.
Definition: ASTReader.cpp:7245
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:2388
CommonBase * Common
Pointer to the common data shared by all declarations of this template.
Definition: DeclTemplate.h:825
static FunctionDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4460
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:698
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)
Definition: