clang  8.0.0svn
ASTReaderDecl.cpp
Go to the documentation of this file.
1 //===- ASTReaderDecl.cpp - Decl Deserialization ---------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the ASTReader::ReadDeclRecord method, which is the
11 // entrypoint for loading a decl.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "ASTCommon.h"
16 #include "ASTReaderInternals.h"
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/Attr.h"
19 #include "clang/AST/AttrIterator.h"
20 #include "clang/AST/Decl.h"
21 #include "clang/AST/DeclBase.h"
22 #include "clang/AST/DeclCXX.h"
23 #include "clang/AST/DeclFriend.h"
24 #include "clang/AST/DeclObjC.h"
25 #include "clang/AST/DeclOpenMP.h"
26 #include "clang/AST/DeclTemplate.h"
27 #include "clang/AST/DeclVisitor.h"
29 #include "clang/AST/Expr.h"
33 #include "clang/AST/OpenMPClause.h"
34 #include "clang/AST/Redeclarable.h"
35 #include "clang/AST/Stmt.h"
36 #include "clang/AST/TemplateBase.h"
37 #include "clang/AST/Type.h"
39 #include "clang/Basic/AttrKinds.h"
42 #include "clang/Basic/LLVM.h"
43 #include "clang/Basic/Lambda.h"
45 #include "clang/Basic/Linkage.h"
46 #include "clang/Basic/Module.h"
49 #include "clang/Basic/Specifiers.h"
56 #include "llvm/ADT/DenseMap.h"
57 #include "llvm/ADT/FoldingSet.h"
58 #include "llvm/ADT/STLExtras.h"
59 #include "llvm/ADT/SmallPtrSet.h"
60 #include "llvm/ADT/SmallVector.h"
61 #include "llvm/ADT/iterator_range.h"
62 #include "llvm/Bitcode/BitstreamReader.h"
63 #include "llvm/Support/Casting.h"
64 #include "llvm/Support/ErrorHandling.h"
65 #include "llvm/Support/SaveAndRestore.h"
66 #include <algorithm>
67 #include <cassert>
68 #include <cstdint>
69 #include <cstring>
70 #include <string>
71 #include <utility>
72 
73 using namespace clang;
74 using namespace serialization;
75 
76 //===----------------------------------------------------------------------===//
77 // Declaration deserialization
78 //===----------------------------------------------------------------------===//
79 
80 namespace clang {
81 
82  class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
83  ASTReader &Reader;
84  ASTRecordReader &Record;
85  ASTReader::RecordLocation Loc;
86  const DeclID ThisDeclID;
87  const SourceLocation ThisDeclLoc;
88 
90 
91  TypeID DeferredTypeID = 0;
92  unsigned AnonymousDeclNumber;
93  GlobalDeclID NamedDeclForTagDecl = 0;
94  IdentifierInfo *TypedefNameForLinkage = nullptr;
95 
96  bool HasPendingBody = false;
97 
98  ///A flag to carry the information for a decl from the entity is
99  /// used. We use it to delay the marking of the canonical decl as used until
100  /// the entire declaration is deserialized and merged.
101  bool IsDeclMarkedUsed = false;
102 
103  uint64_t GetCurrentCursorOffset();
104 
105  uint64_t ReadLocalOffset() {
106  uint64_t LocalOffset = Record.readInt();
107  assert(LocalOffset < Loc.Offset && "offset point after current record");
108  return LocalOffset ? Loc.Offset - LocalOffset : 0;
109  }
110 
111  uint64_t ReadGlobalOffset() {
112  uint64_t Local = ReadLocalOffset();
113  return Local ? Record.getGlobalBitOffset(Local) : 0;
114  }
115 
116  SourceLocation ReadSourceLocation() {
117  return Record.readSourceLocation();
118  }
119 
120  SourceRange ReadSourceRange() {
121  return Record.readSourceRange();
122  }
123 
124  TypeSourceInfo *GetTypeSourceInfo() {
125  return Record.getTypeSourceInfo();
126  }
127 
128  serialization::DeclID ReadDeclID() {
129  return Record.readDeclID();
130  }
131 
132  std::string ReadString() {
133  return Record.readString();
134  }
135 
136  void ReadDeclIDList(SmallVectorImpl<DeclID> &IDs) {
137  for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
138  IDs.push_back(ReadDeclID());
139  }
140 
141  Decl *ReadDecl() {
142  return Record.readDecl();
143  }
144 
145  template<typename T>
146  T *ReadDeclAs() {
147  return Record.readDeclAs<T>();
148  }
149 
150  void ReadQualifierInfo(QualifierInfo &Info) {
151  Record.readQualifierInfo(Info);
152  }
153 
154  void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name) {
155  Record.readDeclarationNameLoc(DNLoc, Name);
156  }
157 
158  serialization::SubmoduleID readSubmoduleID() {
159  if (Record.getIdx() == Record.size())
160  return 0;
161 
162  return Record.getGlobalSubmoduleID(Record.readInt());
163  }
164 
165  Module *readModule() {
166  return Record.getSubmodule(readSubmoduleID());
167  }
168 
169  void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
170  void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
171  const CXXRecordDecl *D);
172  void MergeDefinitionData(CXXRecordDecl *D,
173  struct CXXRecordDecl::DefinitionData &&NewDD);
174  void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
175  void MergeDefinitionData(ObjCInterfaceDecl *D,
176  struct ObjCInterfaceDecl::DefinitionData &&NewDD);
177  void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
178  void MergeDefinitionData(ObjCProtocolDecl *D,
179  struct ObjCProtocolDecl::DefinitionData &&NewDD);
180 
181  static DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
182 
183  static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
184  DeclContext *DC,
185  unsigned Index);
186  static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
187  unsigned Index, NamedDecl *D);
188 
189  /// Results from loading a RedeclarableDecl.
190  class RedeclarableResult {
191  Decl *MergeWith;
192  GlobalDeclID FirstID;
193  bool IsKeyDecl;
194 
195  public:
196  RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
197  : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
198 
199  /// Retrieve the first ID.
200  GlobalDeclID getFirstID() const { return FirstID; }
201 
202  /// Is this declaration a key declaration?
203  bool isKeyDecl() const { return IsKeyDecl; }
204 
205  /// Get a known declaration that this should be merged with, if
206  /// any.
207  Decl *getKnownMergeTarget() const { return MergeWith; }
208  };
209 
210  /// Class used to capture the result of searching for an existing
211  /// declaration of a specific kind and name, along with the ability
212  /// to update the place where this result was found (the declaration
213  /// chain hanging off an identifier or the DeclContext we searched in)
214  /// if requested.
215  class FindExistingResult {
216  ASTReader &Reader;
217  NamedDecl *New = nullptr;
218  NamedDecl *Existing = nullptr;
219  bool AddResult = false;
220  unsigned AnonymousDeclNumber = 0;
221  IdentifierInfo *TypedefNameForLinkage = nullptr;
222 
223  public:
224  FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
225 
226  FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
227  unsigned AnonymousDeclNumber,
228  IdentifierInfo *TypedefNameForLinkage)
229  : Reader(Reader), New(New), Existing(Existing), AddResult(true),
230  AnonymousDeclNumber(AnonymousDeclNumber),
231  TypedefNameForLinkage(TypedefNameForLinkage) {}
232 
233  FindExistingResult(FindExistingResult &&Other)
234  : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
235  AddResult(Other.AddResult),
236  AnonymousDeclNumber(Other.AnonymousDeclNumber),
237  TypedefNameForLinkage(Other.TypedefNameForLinkage) {
238  Other.AddResult = false;
239  }
240 
241  FindExistingResult &operator=(FindExistingResult &&) = delete;
242  ~FindExistingResult();
243 
244  /// Suppress the addition of this result into the known set of
245  /// names.
246  void suppress() { AddResult = false; }
247 
248  operator NamedDecl*() const { return Existing; }
249 
250  template<typename T>
251  operator T*() const { return dyn_cast_or_null<T>(Existing); }
252  };
253 
254  static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
255  DeclContext *DC);
256  FindExistingResult findExisting(NamedDecl *D);
257 
258  public:
260  ASTReader::RecordLocation Loc,
261  DeclID thisDeclID, SourceLocation ThisDeclLoc)
262  : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
263  ThisDeclLoc(ThisDeclLoc) {}
264 
265  template <typename T> static
268  if (IDs.empty())
269  return;
270 
271  // FIXME: We should avoid this pattern of getting the ASTContext.
272  ASTContext &C = D->getASTContext();
273 
274  auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
275 
276  if (auto &Old = LazySpecializations) {
277  IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
278  llvm::sort(IDs);
279  IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
280  }
281 
282  auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
283  *Result = IDs.size();
284  std::copy(IDs.begin(), IDs.end(), Result + 1);
285 
286  LazySpecializations = Result;
287  }
288 
289  template <typename DeclT>
290  static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
291  static Decl *getMostRecentDeclImpl(...);
292  static Decl *getMostRecentDecl(Decl *D);
293 
294  template <typename DeclT>
295  static void attachPreviousDeclImpl(ASTReader &Reader,
297  Decl *Canon);
298  static void attachPreviousDeclImpl(ASTReader &Reader, ...);
299  static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
300  Decl *Canon);
301 
302  template <typename DeclT>
303  static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
304  static void attachLatestDeclImpl(...);
305  static void attachLatestDecl(Decl *D, Decl *latest);
306 
307  template <typename DeclT>
308  static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
309  static void markIncompleteDeclChainImpl(...);
310 
311  /// Determine whether this declaration has a pending body.
312  bool hasPendingBody() const { return HasPendingBody; }
313 
314  void ReadFunctionDefinition(FunctionDecl *FD);
315  void Visit(Decl *D);
316 
317  void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
318 
320  ObjCCategoryDecl *Next) {
321  Cat->NextClassCategory = Next;
322  }
323 
324  void VisitDecl(Decl *D);
325  void VisitPragmaCommentDecl(PragmaCommentDecl *D);
326  void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
327  void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
328  void VisitNamedDecl(NamedDecl *ND);
329  void VisitLabelDecl(LabelDecl *LD);
330  void VisitNamespaceDecl(NamespaceDecl *D);
331  void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
332  void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
333  void VisitTypeDecl(TypeDecl *TD);
334  RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
335  void VisitTypedefDecl(TypedefDecl *TD);
336  void VisitTypeAliasDecl(TypeAliasDecl *TD);
337  void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
338  RedeclarableResult VisitTagDecl(TagDecl *TD);
339  void VisitEnumDecl(EnumDecl *ED);
340  RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
341  void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
342  RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
343  void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
344  RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
346 
349  VisitClassTemplateSpecializationDeclImpl(D);
350  }
351 
352  void VisitClassTemplatePartialSpecializationDecl(
354  void VisitClassScopeFunctionSpecializationDecl(
356  RedeclarableResult
357  VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
358 
360  VisitVarTemplateSpecializationDeclImpl(D);
361  }
362 
363  void VisitVarTemplatePartialSpecializationDecl(
365  void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
366  void VisitValueDecl(ValueDecl *VD);
367  void VisitEnumConstantDecl(EnumConstantDecl *ECD);
368  void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
369  void VisitDeclaratorDecl(DeclaratorDecl *DD);
370  void VisitFunctionDecl(FunctionDecl *FD);
371  void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
372  void VisitCXXMethodDecl(CXXMethodDecl *D);
373  void VisitCXXConstructorDecl(CXXConstructorDecl *D);
374  void VisitCXXDestructorDecl(CXXDestructorDecl *D);
375  void VisitCXXConversionDecl(CXXConversionDecl *D);
376  void VisitFieldDecl(FieldDecl *FD);
377  void VisitMSPropertyDecl(MSPropertyDecl *FD);
378  void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
379  RedeclarableResult VisitVarDeclImpl(VarDecl *D);
380  void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
381  void VisitImplicitParamDecl(ImplicitParamDecl *PD);
382  void VisitParmVarDecl(ParmVarDecl *PD);
383  void VisitDecompositionDecl(DecompositionDecl *DD);
384  void VisitBindingDecl(BindingDecl *BD);
385  void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
386  DeclID VisitTemplateDecl(TemplateDecl *D);
387  RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
388  void VisitClassTemplateDecl(ClassTemplateDecl *D);
389  void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
390  void VisitVarTemplateDecl(VarTemplateDecl *D);
391  void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
392  void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
393  void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
394  void VisitUsingDecl(UsingDecl *D);
395  void VisitUsingPackDecl(UsingPackDecl *D);
396  void VisitUsingShadowDecl(UsingShadowDecl *D);
397  void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
398  void VisitLinkageSpecDecl(LinkageSpecDecl *D);
399  void VisitExportDecl(ExportDecl *D);
400  void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
401  void VisitImportDecl(ImportDecl *D);
402  void VisitAccessSpecDecl(AccessSpecDecl *D);
403  void VisitFriendDecl(FriendDecl *D);
404  void VisitFriendTemplateDecl(FriendTemplateDecl *D);
405  void VisitStaticAssertDecl(StaticAssertDecl *D);
406  void VisitBlockDecl(BlockDecl *BD);
407  void VisitCapturedDecl(CapturedDecl *CD);
408  void VisitEmptyDecl(EmptyDecl *D);
409 
410  std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
411 
412  template<typename T>
413  RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
414 
415  template<typename T>
416  void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
417  DeclID TemplatePatternID = 0);
418 
419  template<typename T>
420  void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
421  RedeclarableResult &Redecl,
422  DeclID TemplatePatternID = 0);
423 
424  template<typename T>
425  void mergeMergeable(Mergeable<T> *D);
426 
427  void mergeTemplatePattern(RedeclarableTemplateDecl *D,
428  RedeclarableTemplateDecl *Existing,
429  DeclID DsID, bool IsKeyDecl);
430 
431  ObjCTypeParamList *ReadObjCTypeParamList();
432 
433  // FIXME: Reorder according to DeclNodes.td?
434  void VisitObjCMethodDecl(ObjCMethodDecl *D);
435  void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
436  void VisitObjCContainerDecl(ObjCContainerDecl *D);
437  void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
438  void VisitObjCIvarDecl(ObjCIvarDecl *D);
439  void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
440  void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
441  void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
442  void VisitObjCImplDecl(ObjCImplDecl *D);
443  void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
444  void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
445  void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
446  void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
447  void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
448  void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
449  void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *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  if (!isa<ParmVarDecl>(VD)) {
1355  VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1356  Record.readInt();
1357  VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1358  VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1359  VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1360  VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1361  VD->NonParmVarDeclBits.ARCPseudoStrong = 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 
1484  bool capturesCXXThis = Record.readInt();
1485  unsigned numCaptures = Record.readInt();
1487  captures.reserve(numCaptures);
1488  for (unsigned i = 0; i != numCaptures; ++i) {
1489  auto *decl = ReadDeclAs<VarDecl>();
1490  unsigned flags = Record.readInt();
1491  bool byRef = (flags & 1);
1492  bool nested = (flags & 2);
1493  Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1494 
1495  captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1496  }
1497  BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1498 }
1499 
1501  VisitDecl(CD);
1502  unsigned ContextParamPos = Record.readInt();
1503  CD->setNothrow(Record.readInt() != 0);
1504  // Body is set by VisitCapturedStmt.
1505  for (unsigned I = 0; I < CD->NumParams; ++I) {
1506  if (I != ContextParamPos)
1507  CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1508  else
1509  CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1510  }
1511 }
1512 
1514  VisitDecl(D);
1515  D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1516  D->setExternLoc(ReadSourceLocation());
1517  D->setRBraceLoc(ReadSourceLocation());
1518 }
1519 
1521  VisitDecl(D);
1522  D->RBraceLoc = ReadSourceLocation();
1523 }
1524 
1526  VisitNamedDecl(D);
1527  D->setLocStart(ReadSourceLocation());
1528 }
1529 
1531  RedeclarableResult Redecl = VisitRedeclarable(D);
1532  VisitNamedDecl(D);
1533  D->setInline(Record.readInt());
1534  D->LocStart = ReadSourceLocation();
1535  D->RBraceLoc = ReadSourceLocation();
1536 
1537  // Defer loading the anonymous namespace until we've finished merging
1538  // this namespace; loading it might load a later declaration of the
1539  // same namespace, and we have an invariant that older declarations
1540  // get merged before newer ones try to merge.
1541  GlobalDeclID AnonNamespace = 0;
1542  if (Redecl.getFirstID() == ThisDeclID) {
1543  AnonNamespace = ReadDeclID();
1544  } else {
1545  // Link this namespace back to the first declaration, which has already
1546  // been deserialized.
1547  D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1548  }
1549 
1550  mergeRedeclarable(D, Redecl);
1551 
1552  if (AnonNamespace) {
1553  // Each module has its own anonymous namespace, which is disjoint from
1554  // any other module's anonymous namespaces, so don't attach the anonymous
1555  // namespace at all.
1556  auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1557  if (!Record.isModule())
1558  D->setAnonymousNamespace(Anon);
1559  }
1560 }
1561 
1563  RedeclarableResult Redecl = VisitRedeclarable(D);
1564  VisitNamedDecl(D);
1565  D->NamespaceLoc = ReadSourceLocation();
1566  D->IdentLoc = ReadSourceLocation();
1567  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1568  D->Namespace = ReadDeclAs<NamedDecl>();
1569  mergeRedeclarable(D, Redecl);
1570 }
1571 
1573  VisitNamedDecl(D);
1574  D->setUsingLoc(ReadSourceLocation());
1575  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1576  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1577  D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1578  D->setTypename(Record.readInt());
1579  if (auto *Pattern = ReadDeclAs<NamedDecl>())
1580  Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1581  mergeMergeable(D);
1582 }
1583 
1585  VisitNamedDecl(D);
1586  D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1587  auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1588  for (unsigned I = 0; I != D->NumExpansions; ++I)
1589  Expansions[I] = ReadDeclAs<NamedDecl>();
1590  mergeMergeable(D);
1591 }
1592 
1594  RedeclarableResult Redecl = VisitRedeclarable(D);
1595  VisitNamedDecl(D);
1596  D->Underlying = ReadDeclAs<NamedDecl>();
1597  D->IdentifierNamespace = Record.readInt();
1598  D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1599  auto *Pattern = ReadDeclAs<UsingShadowDecl>();
1600  if (Pattern)
1601  Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1602  mergeRedeclarable(D, Redecl);
1603 }
1604 
1607  VisitUsingShadowDecl(D);
1608  D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1609  D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1610  D->IsVirtual = Record.readInt();
1611 }
1612 
1614  VisitNamedDecl(D);
1615  D->UsingLoc = ReadSourceLocation();
1616  D->NamespaceLoc = ReadSourceLocation();
1617  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1618  D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1619  D->CommonAncestor = ReadDeclAs<DeclContext>();
1620 }
1621 
1623  VisitValueDecl(D);
1624  D->setUsingLoc(ReadSourceLocation());
1625  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1626  ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1627  D->EllipsisLoc = ReadSourceLocation();
1628  mergeMergeable(D);
1629 }
1630 
1633  VisitTypeDecl(D);
1634  D->TypenameLocation = ReadSourceLocation();
1635  D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1636  D->EllipsisLoc = ReadSourceLocation();
1637  mergeMergeable(D);
1638 }
1639 
1640 void ASTDeclReader::ReadCXXDefinitionData(
1641  struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1642  // Note: the caller has deserialized the IsLambda bit already.
1643  Data.UserDeclaredConstructor = Record.readInt();
1644  Data.UserDeclaredSpecialMembers = Record.readInt();
1645  Data.Aggregate = Record.readInt();
1646  Data.PlainOldData = Record.readInt();
1647  Data.Empty = Record.readInt();
1648  Data.Polymorphic = Record.readInt();
1649  Data.Abstract = Record.readInt();
1650  Data.IsStandardLayout = Record.readInt();
1651  Data.IsCXX11StandardLayout = Record.readInt();
1652  Data.HasBasesWithFields = Record.readInt();
1653  Data.HasBasesWithNonStaticDataMembers = Record.readInt();
1654  Data.HasPrivateFields = Record.readInt();
1655  Data.HasProtectedFields = Record.readInt();
1656  Data.HasPublicFields = Record.readInt();
1657  Data.HasMutableFields = Record.readInt();
1658  Data.HasVariantMembers = Record.readInt();
1659  Data.HasOnlyCMembers = Record.readInt();
1660  Data.HasInClassInitializer = Record.readInt();
1661  Data.HasUninitializedReferenceMember = Record.readInt();
1662  Data.HasUninitializedFields = Record.readInt();
1663  Data.HasInheritedConstructor = Record.readInt();
1664  Data.HasInheritedAssignment = Record.readInt();
1665  Data.NeedOverloadResolutionForCopyConstructor = Record.readInt();
1666  Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1667  Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1668  Data.NeedOverloadResolutionForDestructor = Record.readInt();
1669  Data.DefaultedCopyConstructorIsDeleted = Record.readInt();
1670  Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1671  Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1672  Data.DefaultedDestructorIsDeleted = Record.readInt();
1673  Data.HasTrivialSpecialMembers = Record.readInt();
1674  Data.HasTrivialSpecialMembersForCall = Record.readInt();
1675  Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1676  Data.DeclaredNonTrivialSpecialMembersForCall = Record.readInt();
1677  Data.HasIrrelevantDestructor = Record.readInt();
1678  Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1679  Data.HasDefaultedDefaultConstructor = Record.readInt();
1680  Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1681  Data.HasConstexprDefaultConstructor = Record.readInt();
1682  Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1683  Data.ComputedVisibleConversions = Record.readInt();
1684  Data.UserProvidedDefaultConstructor = Record.readInt();
1685  Data.DeclaredSpecialMembers = Record.readInt();
1686  Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1687  Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1688  Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1689  Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1690  Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1691  Data.ODRHash = Record.readInt();
1692  Data.HasODRHash = true;
1693 
1694  if (Record.readInt())
1695  Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1696 
1697  Data.NumBases = Record.readInt();
1698  if (Data.NumBases)
1699  Data.Bases = ReadGlobalOffset();
1700  Data.NumVBases = Record.readInt();
1701  if (Data.NumVBases)
1702  Data.VBases = ReadGlobalOffset();
1703 
1704  Record.readUnresolvedSet(Data.Conversions);
1705  Record.readUnresolvedSet(Data.VisibleConversions);
1706  assert(Data.Definition && "Data.Definition should be already set!");
1707  Data.FirstFriend = ReadDeclID();
1708 
1709  if (Data.IsLambda) {
1710  using Capture = LambdaCapture;
1711 
1712  auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1713  Lambda.Dependent = Record.readInt();
1714  Lambda.IsGenericLambda = Record.readInt();
1715  Lambda.CaptureDefault = Record.readInt();
1716  Lambda.NumCaptures = Record.readInt();
1717  Lambda.NumExplicitCaptures = Record.readInt();
1718  Lambda.ManglingNumber = Record.readInt();
1719  Lambda.ContextDecl = ReadDeclID();
1720  Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1721  sizeof(Capture) * Lambda.NumCaptures);
1722  Capture *ToCapture = Lambda.Captures;
1723  Lambda.MethodTyInfo = GetTypeSourceInfo();
1724  for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1725  SourceLocation Loc = ReadSourceLocation();
1726  bool IsImplicit = Record.readInt();
1727  auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1728  switch (Kind) {
1729  case LCK_StarThis:
1730  case LCK_This:
1731  case LCK_VLAType:
1732  *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1733  break;
1734  case LCK_ByCopy:
1735  case LCK_ByRef:
1736  auto *Var = ReadDeclAs<VarDecl>();
1737  SourceLocation EllipsisLoc = ReadSourceLocation();
1738  *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1739  break;
1740  }
1741  }
1742  }
1743 }
1744 
1745 void ASTDeclReader::MergeDefinitionData(
1746  CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1747  assert(D->DefinitionData &&
1748  "merging class definition into non-definition");
1749  auto &DD = *D->DefinitionData;
1750 
1751  if (DD.Definition != MergeDD.Definition) {
1752  // Track that we merged the definitions.
1753  Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1754  DD.Definition));
1755  Reader.PendingDefinitions.erase(MergeDD.Definition);
1756  MergeDD.Definition->setCompleteDefinition(false);
1757  Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1758  assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1759  "already loaded pending lookups for merged definition");
1760  }
1761 
1762  auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1763  if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1764  PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1765  // We faked up this definition data because we found a class for which we'd
1766  // not yet loaded the definition. Replace it with the real thing now.
1767  assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1768  PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1769 
1770  // Don't change which declaration is the definition; that is required
1771  // to be invariant once we select it.
1772  auto *Def = DD.Definition;
1773  DD = std::move(MergeDD);
1774  DD.Definition = Def;
1775  return;
1776  }
1777 
1778  // FIXME: Move this out into a .def file?
1779  bool DetectedOdrViolation = false;
1780 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1781 #define MATCH_FIELD(Field) \
1782  DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1783  OR_FIELD(Field)
1784  MATCH_FIELD(UserDeclaredConstructor)
1785  MATCH_FIELD(UserDeclaredSpecialMembers)
1786  MATCH_FIELD(Aggregate)
1787  MATCH_FIELD(PlainOldData)
1788  MATCH_FIELD(Empty)
1789  MATCH_FIELD(Polymorphic)
1790  MATCH_FIELD(Abstract)
1791  MATCH_FIELD(IsStandardLayout)
1792  MATCH_FIELD(IsCXX11StandardLayout)
1793  MATCH_FIELD(HasBasesWithFields)
1794  MATCH_FIELD(HasBasesWithNonStaticDataMembers)
1795  MATCH_FIELD(HasPrivateFields)
1796  MATCH_FIELD(HasProtectedFields)
1797  MATCH_FIELD(HasPublicFields)
1798  MATCH_FIELD(HasMutableFields)
1799  MATCH_FIELD(HasVariantMembers)
1800  MATCH_FIELD(HasOnlyCMembers)
1801  MATCH_FIELD(HasInClassInitializer)
1802  MATCH_FIELD(HasUninitializedReferenceMember)
1803  MATCH_FIELD(HasUninitializedFields)
1804  MATCH_FIELD(HasInheritedConstructor)
1805  MATCH_FIELD(HasInheritedAssignment)
1806  MATCH_FIELD(NeedOverloadResolutionForCopyConstructor)
1807  MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1808  MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1809  MATCH_FIELD(NeedOverloadResolutionForDestructor)
1810  MATCH_FIELD(DefaultedCopyConstructorIsDeleted)
1811  MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1812  MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1813  MATCH_FIELD(DefaultedDestructorIsDeleted)
1814  OR_FIELD(HasTrivialSpecialMembers)
1815  OR_FIELD(HasTrivialSpecialMembersForCall)
1816  OR_FIELD(DeclaredNonTrivialSpecialMembers)
1817  OR_FIELD(DeclaredNonTrivialSpecialMembersForCall)
1818  MATCH_FIELD(HasIrrelevantDestructor)
1819  OR_FIELD(HasConstexprNonCopyMoveConstructor)
1820  OR_FIELD(HasDefaultedDefaultConstructor)
1821  MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1822  OR_FIELD(HasConstexprDefaultConstructor)
1823  MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1824  // ComputedVisibleConversions is handled below.
1825  MATCH_FIELD(UserProvidedDefaultConstructor)
1826  OR_FIELD(DeclaredSpecialMembers)
1827  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1828  MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1829  MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1830  OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1831  OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1832  MATCH_FIELD(IsLambda)
1833 #undef OR_FIELD
1834 #undef MATCH_FIELD
1835 
1836  if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1837  DetectedOdrViolation = true;
1838  // FIXME: Issue a diagnostic if the base classes don't match when we come
1839  // to lazily load them.
1840 
1841  // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1842  // match when we come to lazily load them.
1843  if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1844  DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1845  DD.ComputedVisibleConversions = true;
1846  }
1847 
1848  // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1849  // lazily load it.
1850 
1851  if (DD.IsLambda) {
1852  // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1853  // when they occur within the body of a function template specialization).
1854  }
1855 
1856  if (D->getODRHash() != MergeDD.ODRHash) {
1857  DetectedOdrViolation = true;
1858  }
1859 
1860  if (DetectedOdrViolation)
1861  Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1862  {MergeDD.Definition, &MergeDD});
1863 }
1864 
1865 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1866  struct CXXRecordDecl::DefinitionData *DD;
1867  ASTContext &C = Reader.getContext();
1868 
1869  // Determine whether this is a lambda closure type, so that we can
1870  // allocate the appropriate DefinitionData structure.
1871  bool IsLambda = Record.readInt();
1872  if (IsLambda)
1873  DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1874  LCD_None);
1875  else
1876  DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1877 
1878  CXXRecordDecl *Canon = D->getCanonicalDecl();
1879  // Set decl definition data before reading it, so that during deserialization
1880  // when we read CXXRecordDecl, it already has definition data and we don't
1881  // set fake one.
1882  if (!Canon->DefinitionData)
1883  Canon->DefinitionData = DD;
1884  D->DefinitionData = Canon->DefinitionData;
1885  ReadCXXDefinitionData(*DD, D);
1886 
1887  // We might already have a different definition for this record. This can
1888  // happen either because we're reading an update record, or because we've
1889  // already done some merging. Either way, just merge into it.
1890  if (Canon->DefinitionData != DD) {
1891  MergeDefinitionData(Canon, std::move(*DD));
1892  return;
1893  }
1894 
1895  // Mark this declaration as being a definition.
1896  D->setCompleteDefinition(true);
1897 
1898  // If this is not the first declaration or is an update record, we can have
1899  // other redeclarations already. Make a note that we need to propagate the
1900  // DefinitionData pointer onto them.
1901  if (Update || Canon != D)
1902  Reader.PendingDefinitions.insert(D);
1903 }
1904 
1905 ASTDeclReader::RedeclarableResult
1907  RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1908 
1909  ASTContext &C = Reader.getContext();
1910 
1911  enum CXXRecKind {
1912  CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1913  };
1914  switch ((CXXRecKind)Record.readInt()) {
1915  case CXXRecNotTemplate:
1916  // Merged when we merge the folding set entry in the primary template.
1917  if (!isa<ClassTemplateSpecializationDecl>(D))
1918  mergeRedeclarable(D, Redecl);
1919  break;
1920  case CXXRecTemplate: {
1921  // Merged when we merge the template.
1922  auto *Template = ReadDeclAs<ClassTemplateDecl>();
1923  D->TemplateOrInstantiation = Template;
1924  if (!Template->getTemplatedDecl()) {
1925  // We've not actually loaded the ClassTemplateDecl yet, because we're
1926  // currently being loaded as its pattern. Rely on it to set up our
1927  // TypeForDecl (see VisitClassTemplateDecl).
1928  //
1929  // Beware: we do not yet know our canonical declaration, and may still
1930  // get merged once the surrounding class template has got off the ground.
1931  DeferredTypeID = 0;
1932  }
1933  break;
1934  }
1935  case CXXRecMemberSpecialization: {
1936  auto *RD = ReadDeclAs<CXXRecordDecl>();
1937  auto TSK = (TemplateSpecializationKind)Record.readInt();
1938  SourceLocation POI = ReadSourceLocation();
1939  MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1940  MSI->setPointOfInstantiation(POI);
1941  D->TemplateOrInstantiation = MSI;
1942  mergeRedeclarable(D, Redecl);
1943  break;
1944  }
1945  }
1946 
1947  bool WasDefinition = Record.readInt();
1948  if (WasDefinition)
1949  ReadCXXRecordDefinition(D, /*Update*/false);
1950  else
1951  // Propagate DefinitionData pointer from the canonical declaration.
1952  D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1953 
1954  // Lazily load the key function to avoid deserializing every method so we can
1955  // compute it.
1956  if (WasDefinition) {
1957  DeclID KeyFn = ReadDeclID();
1958  if (KeyFn && D->isCompleteDefinition())
1959  // FIXME: This is wrong for the ARM ABI, where some other module may have
1960  // made this function no longer be a key function. We need an update
1961  // record or similar for that case.
1962  C.KeyFunctions[D] = KeyFn;
1963  }
1964 
1965  return Redecl;
1966 }
1967 
1969  VisitFunctionDecl(D);
1970  D->setIsCopyDeductionCandidate(Record.readInt());
1971 }
1972 
1974  VisitFunctionDecl(D);
1975 
1976  unsigned NumOverridenMethods = Record.readInt();
1977  if (D->isCanonicalDecl()) {
1978  while (NumOverridenMethods--) {
1979  // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1980  // MD may be initializing.
1981  if (auto *MD = ReadDeclAs<CXXMethodDecl>())
1982  Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1983  }
1984  } else {
1985  // We don't care about which declarations this used to override; we get
1986  // the relevant information from the canonical declaration.
1987  Record.skipInts(NumOverridenMethods);
1988  }
1989 }
1990 
1992  // We need the inherited constructor information to merge the declaration,
1993  // so we have to read it before we call VisitCXXMethodDecl.
1994  if (D->isInheritingConstructor()) {
1995  auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1996  auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1997  *D->getTrailingObjects<InheritedConstructor>() =
1998  InheritedConstructor(Shadow, Ctor);
1999  }
2000 
2001  VisitCXXMethodDecl(D);
2002 }
2003 
2005  VisitCXXMethodDecl(D);
2006 
2007  if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
2008  CXXDestructorDecl *Canon = D->getCanonicalDecl();
2009  auto *ThisArg = Record.readExpr();
2010  // FIXME: Check consistency if we have an old and new operator delete.
2011  if (!Canon->OperatorDelete) {
2012  Canon->OperatorDelete = OperatorDelete;
2013  Canon->OperatorDeleteThisArg = ThisArg;
2014  }
2015  }
2016 }
2017 
2019  VisitCXXMethodDecl(D);
2020 }
2021 
2023  VisitDecl(D);
2024  D->ImportedAndComplete.setPointer(readModule());
2025  D->ImportedAndComplete.setInt(Record.readInt());
2026  auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
2027  for (unsigned I = 0, N = Record.back(); I != N; ++I)
2028  StoredLocs[I] = ReadSourceLocation();
2029  Record.skipInts(1); // The number of stored source locations.
2030 }
2031 
2033  VisitDecl(D);
2034  D->setColonLoc(ReadSourceLocation());
2035 }
2036 
2038  VisitDecl(D);
2039  if (Record.readInt()) // hasFriendDecl
2040  D->Friend = ReadDeclAs<NamedDecl>();
2041  else
2042  D->Friend = GetTypeSourceInfo();
2043  for (unsigned i = 0; i != D->NumTPLists; ++i)
2044  D->getTrailingObjects<TemplateParameterList *>()[i] =
2045  Record.readTemplateParameterList();
2046  D->NextFriend = ReadDeclID();
2047  D->UnsupportedFriend = (Record.readInt() != 0);
2048  D->FriendLoc = ReadSourceLocation();
2049 }
2050 
2052  VisitDecl(D);
2053  unsigned NumParams = Record.readInt();
2054  D->NumParams = NumParams;
2055  D->Params = new TemplateParameterList*[NumParams];
2056  for (unsigned i = 0; i != NumParams; ++i)
2057  D->Params[i] = Record.readTemplateParameterList();
2058  if (Record.readInt()) // HasFriendDecl
2059  D->Friend = ReadDeclAs<NamedDecl>();
2060  else
2061  D->Friend = GetTypeSourceInfo();
2062  D->FriendLoc = ReadSourceLocation();
2063 }
2064 
2066  VisitNamedDecl(D);
2067 
2068  DeclID PatternID = ReadDeclID();
2069  auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2070  TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2071  // FIXME handle associated constraints
2072  D->init(TemplatedDecl, TemplateParams);
2073 
2074  return PatternID;
2075 }
2076 
2077 ASTDeclReader::RedeclarableResult
2079  RedeclarableResult Redecl = VisitRedeclarable(D);
2080 
2081  // Make sure we've allocated the Common pointer first. We do this before
2082  // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2084  if (!CanonD->Common) {
2085  CanonD->Common = CanonD->newCommon(Reader.getContext());
2086  Reader.PendingDefinitions.insert(CanonD);
2087  }
2088  D->Common = CanonD->Common;
2089 
2090  // If this is the first declaration of the template, fill in the information
2091  // for the 'common' pointer.
2092  if (ThisDeclID == Redecl.getFirstID()) {
2093  if (auto *RTD = ReadDeclAs<RedeclarableTemplateDecl>()) {
2094  assert(RTD->getKind() == D->getKind() &&
2095  "InstantiatedFromMemberTemplate kind mismatch");
2097  if (Record.readInt())
2099  }
2100  }
2101 
2102  DeclID PatternID = VisitTemplateDecl(D);
2103  D->IdentifierNamespace = Record.readInt();
2104 
2105  mergeRedeclarable(D, Redecl, PatternID);
2106 
2107  // If we merged the template with a prior declaration chain, merge the common
2108  // pointer.
2109  // FIXME: Actually merge here, don't just overwrite.
2110  D->Common = D->getCanonicalDecl()->Common;
2111 
2112  return Redecl;
2113 }
2114 
2116  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2117 
2118  if (ThisDeclID == Redecl.getFirstID()) {
2119  // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2120  // the specializations.
2122  ReadDeclIDList(SpecIDs);
2124  }
2125 
2126  if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2127  // We were loaded before our templated declaration was. We've not set up
2128  // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2129  // it now.
2130  Reader.getContext().getInjectedClassNameType(
2132  }
2133 }
2134 
2136  llvm_unreachable("BuiltinTemplates are not serialized");
2137 }
2138 
2139 /// TODO: Unify with ClassTemplateDecl version?
2140 /// May require unifying ClassTemplateDecl and
2141 /// VarTemplateDecl beyond TemplateDecl...
2143  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2144 
2145  if (ThisDeclID == Redecl.getFirstID()) {
2146  // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2147  // the specializations.
2149  ReadDeclIDList(SpecIDs);
2151  }
2152 }
2153 
2154 ASTDeclReader::RedeclarableResult
2157  RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2158 
2159  ASTContext &C = Reader.getContext();
2160  if (Decl *InstD = ReadDecl()) {
2161  if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2162  D->SpecializedTemplate = CTD;
2163  } else {
2165  Record.readTemplateArgumentList(TemplArgs);
2166  TemplateArgumentList *ArgList
2167  = TemplateArgumentList::CreateCopy(C, TemplArgs);
2168  auto *PS =
2170  SpecializedPartialSpecialization();
2171  PS->PartialSpecialization
2172  = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2173  PS->TemplateArgs = ArgList;
2174  D->SpecializedTemplate = PS;
2175  }
2176  }
2177 
2179  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2180  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2181  D->PointOfInstantiation = ReadSourceLocation();
2182  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2183 
2184  bool writtenAsCanonicalDecl = Record.readInt();
2185  if (writtenAsCanonicalDecl) {
2186  auto *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2187  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2188  // Set this as, or find, the canonical declaration for this specialization
2190  if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2191  CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2192  .GetOrInsertNode(Partial);
2193  } else {
2194  CanonSpec =
2195  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2196  }
2197  // If there was already a canonical specialization, merge into it.
2198  if (CanonSpec != D) {
2199  mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2200 
2201  // This declaration might be a definition. Merge with any existing
2202  // definition.
2203  if (auto *DDD = D->DefinitionData) {
2204  if (CanonSpec->DefinitionData)
2205  MergeDefinitionData(CanonSpec, std::move(*DDD));
2206  else
2207  CanonSpec->DefinitionData = D->DefinitionData;
2208  }
2209  D->DefinitionData = CanonSpec->DefinitionData;
2210  }
2211  }
2212  }
2213 
2214  // Explicit info.
2215  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2216  auto *ExplicitInfo =
2217  new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2218  ExplicitInfo->TypeAsWritten = TyInfo;
2219  ExplicitInfo->ExternLoc = ReadSourceLocation();
2220  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2221  D->ExplicitInfo = ExplicitInfo;
2222  }
2223 
2224  return Redecl;
2225 }
2226 
2229  RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2230 
2231  D->TemplateParams = Record.readTemplateParameterList();
2232  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2233 
2234  // These are read/set from/to the first declaration.
2235  if (ThisDeclID == Redecl.getFirstID()) {
2236  D->InstantiatedFromMember.setPointer(
2237  ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2238  D->InstantiatedFromMember.setInt(Record.readInt());
2239  }
2240 }
2241 
2244  VisitDecl(D);
2245  D->Specialization = ReadDeclAs<CXXMethodDecl>();
2246 }
2247 
2249  RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2250 
2251  if (ThisDeclID == Redecl.getFirstID()) {
2252  // This FunctionTemplateDecl owns a CommonPtr; read it.
2254  ReadDeclIDList(SpecIDs);
2256  }
2257 }
2258 
2259 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2260 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2261 /// VarTemplate(Partial)SpecializationDecl with a new data
2262 /// structure Template(Partial)SpecializationDecl, and
2263 /// using Template(Partial)SpecializationDecl as input type.
2264 ASTDeclReader::RedeclarableResult
2267  RedeclarableResult Redecl = VisitVarDeclImpl(D);
2268 
2269  ASTContext &C = Reader.getContext();
2270  if (Decl *InstD = ReadDecl()) {
2271  if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2272  D->SpecializedTemplate = VTD;
2273  } else {
2275  Record.readTemplateArgumentList(TemplArgs);
2277  C, TemplArgs);
2278  auto *PS =
2279  new (C)
2280  VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2281  PS->PartialSpecialization =
2282  cast<VarTemplatePartialSpecializationDecl>(InstD);
2283  PS->TemplateArgs = ArgList;
2284  D->SpecializedTemplate = PS;
2285  }
2286  }
2287 
2288  // Explicit info.
2289  if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2290  auto *ExplicitInfo =
2291  new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2292  ExplicitInfo->TypeAsWritten = TyInfo;
2293  ExplicitInfo->ExternLoc = ReadSourceLocation();
2294  ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2295  D->ExplicitInfo = ExplicitInfo;
2296  }
2297 
2299  Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2300  D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2301  D->PointOfInstantiation = ReadSourceLocation();
2302  D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2303  D->IsCompleteDefinition = Record.readInt();
2304 
2305  bool writtenAsCanonicalDecl = Record.readInt();
2306  if (writtenAsCanonicalDecl) {
2307  auto *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2308  if (D->isCanonicalDecl()) { // It's kept in the folding set.
2309  // FIXME: If it's already present, merge it.
2310  if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2311  CanonPattern->getCommonPtr()->PartialSpecializations
2312  .GetOrInsertNode(Partial);
2313  } else {
2314  CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2315  }
2316  }
2317  }
2318 
2319  return Redecl;
2320 }
2321 
2322 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2323 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2324 /// VarTemplate(Partial)SpecializationDecl with a new data
2325 /// structure Template(Partial)SpecializationDecl, and
2326 /// using Template(Partial)SpecializationDecl as input type.
2329  RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2330 
2331  D->TemplateParams = Record.readTemplateParameterList();
2332  D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2333 
2334  // These are read/set from/to the first declaration.
2335  if (ThisDeclID == Redecl.getFirstID()) {
2336  D->InstantiatedFromMember.setPointer(
2337  ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2338  D->InstantiatedFromMember.setInt(Record.readInt());
2339  }
2340 }
2341 
2343  VisitTypeDecl(D);
2344 
2345  D->setDeclaredWithTypename(Record.readInt());
2346 
2347  if (Record.readInt())
2348  D->setDefaultArgument(GetTypeSourceInfo());
2349 }
2350 
2352  VisitDeclaratorDecl(D);
2353  // TemplateParmPosition.
2354  D->setDepth(Record.readInt());
2355  D->setPosition(Record.readInt());
2356  if (D->isExpandedParameterPack()) {
2357  auto TypesAndInfos =
2358  D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2359  for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2360  new (&TypesAndInfos[I].first) QualType(Record.readType());
2361  TypesAndInfos[I].second = GetTypeSourceInfo();
2362  }
2363  } else {
2364  // Rest of NonTypeTemplateParmDecl.
2365  D->ParameterPack = Record.readInt();
2366  if (Record.readInt())
2367  D->setDefaultArgument(Record.readExpr());
2368  }
2369 }
2370 
2372  VisitTemplateDecl(D);
2373  // TemplateParmPosition.
2374  D->setDepth(Record.readInt());
2375  D->setPosition(Record.readInt());
2376  if (D->isExpandedParameterPack()) {
2377  auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2378  for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2379  I != N; ++I)
2380  Data[I] = Record.readTemplateParameterList();
2381  } else {
2382  // Rest of TemplateTemplateParmDecl.
2383  D->ParameterPack = Record.readInt();
2384  if (Record.readInt())
2385  D->setDefaultArgument(Reader.getContext(),
2386  Record.readTemplateArgumentLoc());
2387  }
2388 }
2389 
2391  VisitRedeclarableTemplateDecl(D);
2392 }
2393 
2395  VisitDecl(D);
2396  D->AssertExprAndFailed.setPointer(Record.readExpr());
2397  D->AssertExprAndFailed.setInt(Record.readInt());
2398  D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2399  D->RParenLoc = ReadSourceLocation();
2400 }
2401 
2403  VisitDecl(D);
2404 }
2405 
2406 std::pair<uint64_t, uint64_t>
2408  uint64_t LexicalOffset = ReadLocalOffset();
2409  uint64_t VisibleOffset = ReadLocalOffset();
2410  return std::make_pair(LexicalOffset, VisibleOffset);
2411 }
2412 
2413 template <typename T>
2414 ASTDeclReader::RedeclarableResult
2416  DeclID FirstDeclID = ReadDeclID();
2417  Decl *MergeWith = nullptr;
2418 
2419  bool IsKeyDecl = ThisDeclID == FirstDeclID;
2420  bool IsFirstLocalDecl = false;
2421 
2422  uint64_t RedeclOffset = 0;
2423 
2424  // 0 indicates that this declaration was the only declaration of its entity,
2425  // and is used for space optimization.
2426  if (FirstDeclID == 0) {
2427  FirstDeclID = ThisDeclID;
2428  IsKeyDecl = true;
2429  IsFirstLocalDecl = true;
2430  } else if (unsigned N = Record.readInt()) {
2431  // This declaration was the first local declaration, but may have imported
2432  // other declarations.
2433  IsKeyDecl = N == 1;
2434  IsFirstLocalDecl = true;
2435 
2436  // We have some declarations that must be before us in our redeclaration
2437  // chain. Read them now, and remember that we ought to merge with one of
2438  // them.
2439  // FIXME: Provide a known merge target to the second and subsequent such
2440  // declaration.
2441  for (unsigned I = 0; I != N - 1; ++I)
2442  MergeWith = ReadDecl();
2443 
2444  RedeclOffset = ReadLocalOffset();
2445  } else {
2446  // This declaration was not the first local declaration. Read the first
2447  // local declaration now, to trigger the import of other redeclarations.
2448  (void)ReadDecl();
2449  }
2450 
2451  auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2452  if (FirstDecl != D) {
2453  // We delay loading of the redeclaration chain to avoid deeply nested calls.
2454  // We temporarily set the first (canonical) declaration as the previous one
2455  // which is the one that matters and mark the real previous DeclID to be
2456  // loaded & attached later on.
2458  D->First = FirstDecl->getCanonicalDecl();
2459  }
2460 
2461  auto *DAsT = static_cast<T *>(D);
2462 
2463  // Note that we need to load local redeclarations of this decl and build a
2464  // decl chain for them. This must happen *after* we perform the preloading
2465  // above; this ensures that the redeclaration chain is built in the correct
2466  // order.
2467  if (IsFirstLocalDecl)
2468  Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2469 
2470  return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2471 }
2472 
2473 /// Attempts to merge the given declaration (D) with another declaration
2474 /// of the same entity.
2475 template<typename T>
2477  RedeclarableResult &Redecl,
2478  DeclID TemplatePatternID) {
2479  // If modules are not available, there is no reason to perform this merge.
2480  if (!Reader.getContext().getLangOpts().Modules)
2481  return;
2482 
2483  // If we're not the canonical declaration, we don't need to merge.
2484  if (!DBase->isFirstDecl())
2485  return;
2486 
2487  auto *D = static_cast<T *>(DBase);
2488 
2489  if (auto *Existing = Redecl.getKnownMergeTarget())
2490  // We already know of an existing declaration we should merge with.
2491  mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2492  else if (FindExistingResult ExistingRes = findExisting(D))
2493  if (T *Existing = ExistingRes)
2494  mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2495 }
2496 
2497 /// "Cast" to type T, asserting if we don't have an implicit conversion.
2498 /// We use this to put code in a template that will only be valid for certain
2499 /// instantiations.
2500 template<typename T> static T assert_cast(T t) { return t; }
2501 template<typename T> static T assert_cast(...) {
2502  llvm_unreachable("bad assert_cast");
2503 }
2504 
2505 /// Merge together the pattern declarations from two template
2506 /// declarations.
2508  RedeclarableTemplateDecl *Existing,
2509  DeclID DsID, bool IsKeyDecl) {
2510  auto *DPattern = D->getTemplatedDecl();
2511  auto *ExistingPattern = Existing->getTemplatedDecl();
2512  RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2513  DPattern->getCanonicalDecl()->getGlobalID(),
2514  IsKeyDecl);
2515 
2516  if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2517  // Merge with any existing definition.
2518  // FIXME: This is duplicated in several places. Refactor.
2519  auto *ExistingClass =
2520  cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2521  if (auto *DDD = DClass->DefinitionData) {
2522  if (ExistingClass->DefinitionData) {
2523  MergeDefinitionData(ExistingClass, std::move(*DDD));
2524  } else {
2525  ExistingClass->DefinitionData = DClass->DefinitionData;
2526  // We may have skipped this before because we thought that DClass
2527  // was the canonical declaration.
2528  Reader.PendingDefinitions.insert(DClass);
2529  }
2530  }
2531  DClass->DefinitionData = ExistingClass->DefinitionData;
2532 
2533  return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2534  Result);
2535  }
2536  if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2537  return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2538  Result);
2539  if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2540  return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2541  if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2542  return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2543  Result);
2544  llvm_unreachable("merged an unknown kind of redeclarable template");
2545 }
2546 
2547 /// Attempts to merge the given declaration (D) with another declaration
2548 /// of the same entity.
2549 template<typename T>
2551  RedeclarableResult &Redecl,
2552  DeclID TemplatePatternID) {
2553  auto *D = static_cast<T *>(DBase);
2554  T *ExistingCanon = Existing->getCanonicalDecl();
2555  T *DCanon = D->getCanonicalDecl();
2556  if (ExistingCanon != DCanon) {
2557  assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2558  "already merged this declaration");
2559 
2560  // Have our redeclaration link point back at the canonical declaration
2561  // of the existing declaration, so that this declaration has the
2562  // appropriate canonical declaration.
2563  D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2564  D->First = ExistingCanon;
2565  ExistingCanon->Used |= D->Used;
2566  D->Used = false;
2567 
2568  // When we merge a namespace, update its pointer to the first namespace.
2569  // We cannot have loaded any redeclarations of this declaration yet, so
2570  // there's nothing else that needs to be updated.
2571  if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2572  Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2573  assert_cast<NamespaceDecl*>(ExistingCanon));
2574 
2575  // When we merge a template, merge its pattern.
2576  if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2577  mergeTemplatePattern(
2578  DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2579  TemplatePatternID, Redecl.isKeyDecl());
2580 
2581  // If this declaration is a key declaration, make a note of that.
2582  if (Redecl.isKeyDecl())
2583  Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2584  }
2585 }
2586 
2587 /// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2588 /// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2589 /// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2590 /// that some types are mergeable during deserialization, otherwise name
2591 /// lookup fails. This is the case for EnumConstantDecl.
2593  if (!ND)
2594  return false;
2595  // TODO: implement merge for other necessary decls.
2596  if (isa<EnumConstantDecl>(ND))
2597  return true;
2598  return false;
2599 }
2600 
2601 /// Attempts to merge the given declaration (D) with another declaration
2602 /// of the same entity, for the case where the entity is not actually
2603 /// redeclarable. This happens, for instance, when merging the fields of
2604 /// identical class definitions from two different modules.
2605 template<typename T>
2607  // If modules are not available, there is no reason to perform this merge.
2608  if (!Reader.getContext().getLangOpts().Modules)
2609  return;
2610 
2611  // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2612  // Note that C identically-named things in different translation units are
2613  // not redeclarations, but may still have compatible types, where ODR-like
2614  // semantics may apply.
2615  if (!Reader.getContext().getLangOpts().CPlusPlus &&
2616  !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2617  return;
2618 
2619  if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2620  if (T *Existing = ExistingRes)
2621  Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2622  Existing->getCanonicalDecl());
2623 }
2624 
2626  VisitDecl(D);
2627  unsigned NumVars = D->varlist_size();
2629  Vars.reserve(NumVars);
2630  for (unsigned i = 0; i != NumVars; ++i) {
2631  Vars.push_back(Record.readExpr());
2632  }
2633  D->setVars(Vars);
2634 }
2635 
2637  VisitDecl(D);
2638  unsigned NumClauses = D->clauselist_size();
2640  Clauses.reserve(NumClauses);
2641  OMPClauseReader ClauseReader(Record);
2642  for (unsigned I = 0; I != NumClauses; ++I)
2643  Clauses.push_back(ClauseReader.readClause());
2644  D->setClauses(Clauses);
2645 }
2646 
2648  VisitValueDecl(D);
2649  D->setLocation(ReadSourceLocation());
2650  Expr *In = Record.readExpr();
2651  Expr *Out = Record.readExpr();
2652  D->setCombinerData(In, Out);
2653  Expr *Combiner = Record.readExpr();
2654  D->setCombiner(Combiner);
2655  Expr *Orig = Record.readExpr();
2656  Expr *Priv = Record.readExpr();
2657  D->setInitializerData(Orig, Priv);
2658  Expr *Init = Record.readExpr();
2659  auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2660  D->setInitializer(Init, IK);
2661  D->PrevDeclInScope = ReadDeclID();
2662 }
2663 
2665  VisitVarDecl(D);
2666 }
2667 
2668 //===----------------------------------------------------------------------===//
2669 // Attribute Reading
2670 //===----------------------------------------------------------------------===//
2671 
2672 namespace {
2673 class AttrReader {
2674  ModuleFile *F;
2675  ASTReader *Reader;
2676  const ASTReader::RecordData &Record;
2677  unsigned &Idx;
2678 
2679 public:
2680  AttrReader(ModuleFile &F, ASTReader &Reader,
2681  const ASTReader::RecordData &Record, unsigned &Idx)
2682  : F(&F), Reader(&Reader), Record(Record), Idx(Idx) {}
2683 
2684  const uint64_t &readInt() { return Record[Idx++]; }
2685 
2686  SourceRange readSourceRange() {
2687  return Reader->ReadSourceRange(*F, Record, Idx);
2688  }
2689 
2690  Expr *readExpr() { return Reader->ReadExpr(*F); }
2691 
2692  std::string readString() {
2693  return Reader->ReadString(Record, Idx);
2694  }
2695 
2696  TypeSourceInfo *getTypeSourceInfo() {
2697  return Reader->GetTypeSourceInfo(*F, Record, Idx);
2698  }
2699 
2700  IdentifierInfo *getIdentifierInfo() {
2701  return Reader->GetIdentifierInfo(*F, Record, Idx);
2702  }
2703 
2704  VersionTuple readVersionTuple() {
2705  return ASTReader::ReadVersionTuple(Record, Idx);
2706  }
2707 
2708  template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2709  return cast_or_null<T>(Reader->GetLocalDecl(*F, LocalID));
2710  }
2711 };
2712 }
2713 
2715  unsigned &Idx) {
2716  AttrReader Record(M, *this, Rec, Idx);
2717  auto V = Record.readInt();
2718  if (!V)
2719  return nullptr;
2720 
2721  Attr *New = nullptr;
2722  // Kind is stored as a 1-based integer because 0 is used to indicate a null
2723  // Attr pointer.
2724  auto Kind = static_cast<attr::Kind>(V - 1);
2725  SourceRange Range = Record.readSourceRange();
2726  ASTContext &Context = getContext();
2727 
2728 #include "clang/Serialization/AttrPCHRead.inc"
2729 
2730  assert(New && "Unable to decode attribute?");
2731  return New;
2732 }
2733 
2734 /// Reads attributes from the current stream position.
2736  for (unsigned I = 0, E = Record.readInt(); I != E; ++I)
2737  Attrs.push_back(Record.readAttr());
2738 }
2739 
2740 //===----------------------------------------------------------------------===//
2741 // ASTReader Implementation
2742 //===----------------------------------------------------------------------===//
2743 
2744 /// Note that we have loaded the declaration with the given
2745 /// Index.
2746 ///
2747 /// This routine notes that this declaration has already been loaded,
2748 /// so that future GetDecl calls will return this declaration rather
2749 /// than trying to load a new declaration.
2750 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2751  assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2752  DeclsLoaded[Index] = D;
2753 }
2754 
2755 /// Determine whether the consumer will be interested in seeing
2756 /// this declaration (via HandleTopLevelDecl).
2757 ///
2758 /// This routine should return true for anything that might affect
2759 /// code generation, e.g., inline function definitions, Objective-C
2760 /// declarations with metadata, etc.
2761 static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2762  // An ObjCMethodDecl is never considered as "interesting" because its
2763  // implementation container always is.
2764 
2765  // An ImportDecl or VarDecl imported from a module map module will get
2766  // emitted when we import the relevant module.
2767  if (isa<ImportDecl>(D) || isa<VarDecl>(D)) {
2768  auto *M = D->getImportedOwningModule();
2769  if (M && M->Kind == Module::ModuleMapModule &&
2770  Ctx.DeclMustBeEmitted(D))
2771  return false;
2772  }
2773 
2774  if (isa<FileScopeAsmDecl>(D) ||
2775  isa<ObjCProtocolDecl>(D) ||
2776  isa<ObjCImplDecl>(D) ||
2777  isa<ImportDecl>(D) ||
2778  isa<PragmaCommentDecl>(D) ||
2779  isa<PragmaDetectMismatchDecl>(D))
2780  return true;
2781  if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D))
2782  return !D->getDeclContext()->isFunctionOrMethod();
2783  if (const auto *Var = dyn_cast<VarDecl>(D))
2784  return Var->isFileVarDecl() &&
2785  (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2786  OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2787  if (const auto *Func = dyn_cast<FunctionDecl>(D))
2788  return Func->doesThisDeclarationHaveABody() || HasBody;
2789 
2790  if (auto *ES = D->getASTContext().getExternalSource())
2791  if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2792  return true;
2793 
2794  return false;
2795 }
2796 
2797 /// Get the correct cursor and offset for loading a declaration.
2798 ASTReader::RecordLocation
2799 ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2800  GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2801  assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2802  ModuleFile *M = I->second;
2803  const DeclOffset &DOffs =
2804  M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2805  Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2806  return RecordLocation(M, DOffs.BitOffset);
2807 }
2808 
2809 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2810  auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2811 
2812  assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2813  return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2814 }
2815 
2816 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2817  return LocalOffset + M.GlobalBitOffset;
2818 }
2819 
2821  const TemplateParameterList *Y);
2822 
2823 /// Determine whether two template parameters are similar enough
2824 /// that they may be used in declarations of the same template.
2825 static bool isSameTemplateParameter(const NamedDecl *X,
2826  const NamedDecl *Y) {
2827  if (X->getKind() != Y->getKind())
2828  return false;
2829 
2830  if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2831  const auto *TY = cast<TemplateTypeParmDecl>(Y);
2832  return TX->isParameterPack() == TY->isParameterPack();
2833  }
2834 
2835  if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2836  const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2837  return TX->isParameterPack() == TY->isParameterPack() &&
2838  TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2839  }
2840 
2841  const auto *TX = cast<TemplateTemplateParmDecl>(X);
2842  const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2843  return TX->isParameterPack() == TY->isParameterPack() &&
2844  isSameTemplateParameterList(TX->getTemplateParameters(),
2845  TY->getTemplateParameters());
2846 }
2847 
2849  if (auto *NS = X->getAsNamespace())
2850  return NS;
2851  if (auto *NAS = X->getAsNamespaceAlias())
2852  return NAS->getNamespace();
2853  return nullptr;
2854 }
2855 
2857  const NestedNameSpecifier *Y) {
2858  if (auto *NSX = getNamespace(X)) {
2859  auto *NSY = getNamespace(Y);
2860  if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2861  return false;
2862  } else if (X->getKind() != Y->getKind())
2863  return false;
2864 
2865  // FIXME: For namespaces and types, we're permitted to check that the entity
2866  // is named via the same tokens. We should probably do so.
2867  switch (X->getKind()) {
2869  if (X->getAsIdentifier() != Y->getAsIdentifier())
2870  return false;
2871  break;
2874  // We've already checked that we named the same namespace.
2875  break;
2878  if (X->getAsType()->getCanonicalTypeInternal() !=
2880  return false;
2881  break;
2884  return true;
2885  }
2886 
2887  // Recurse into earlier portion of NNS, if any.
2888  auto *PX = X->getPrefix();
2889  auto *PY = Y->getPrefix();
2890  if (PX && PY)
2891  return isSameQualifier(PX, PY);
2892  return !PX && !PY;
2893 }
2894 
2895 /// Determine whether two template parameter lists are similar enough
2896 /// that they may be used in declarations of the same template.
2898  const TemplateParameterList *Y) {
2899  if (X->size() != Y->size())
2900  return false;
2901 
2902  for (unsigned I = 0, N = X->size(); I != N; ++I)
2903  if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2904  return false;
2905 
2906  return true;
2907 }
2908 
2909 /// Determine whether the attributes we can overload on are identical for A and
2910 /// B. Will ignore any overloadable attrs represented in the type of A and B.
2912  const FunctionDecl *B) {
2913  // Note that pass_object_size attributes are represented in the function's
2914  // ExtParameterInfo, so we don't need to check them here.
2915 
2916  llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2917  auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
2918  auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
2919 
2920  for (auto Pair : zip_longest(AEnableIfAttrs, BEnableIfAttrs)) {
2921  Optional<EnableIfAttr *> Cand1A = std::get<0>(Pair);
2922  Optional<EnableIfAttr *> Cand2A = std::get<1>(Pair);
2923 
2924  // Return false if the number of enable_if attributes is different.
2925  if (!Cand1A || !Cand2A)
2926  return false;
2927 
2928  Cand1ID.clear();
2929  Cand2ID.clear();
2930 
2931  (*Cand1A)->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2932  (*Cand2A)->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2933 
2934  // Return false if any of the enable_if expressions of A and B are
2935  // different.
2936  if (Cand1ID != Cand2ID)
2937  return false;
2938  }
2939  return true;
2940 }
2941 
2942 /// Determine whether the two declarations refer to the same entity.
2943 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2944  assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2945 
2946  if (X == Y)
2947  return true;
2948 
2949  // Must be in the same context.
2950  //
2951  // Note that we can't use DeclContext::Equals here, because the DeclContexts
2952  // could be two different declarations of the same function. (We will fix the
2953  // semantic DC to refer to the primary definition after merging.)
2954  if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
2955  cast<Decl>(Y->getDeclContext()->getRedeclContext())))
2956  return false;
2957 
2958  // Two typedefs refer to the same entity if they have the same underlying
2959  // type.
2960  if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
2961  if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2962  return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2963  TypedefY->getUnderlyingType());
2964 
2965  // Must have the same kind.
2966  if (X->getKind() != Y->getKind())
2967  return false;
2968 
2969  // Objective-C classes and protocols with the same name always match.
2970  if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2971  return true;
2972 
2973  if (isa<ClassTemplateSpecializationDecl>(X)) {
2974  // No need to handle these here: we merge them when adding them to the
2975  // template.
2976  return false;
2977  }
2978 
2979  // Compatible tags match.
2980  if (const auto *TagX = dyn_cast<TagDecl>(X)) {
2981  const auto *TagY = cast<TagDecl>(Y);
2982  return (TagX->getTagKind() == TagY->getTagKind()) ||
2983  ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2984  TagX->getTagKind() == TTK_Interface) &&
2985  (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2986  TagY->getTagKind() == TTK_Interface));
2987  }
2988 
2989  // Functions with the same type and linkage match.
2990  // FIXME: This needs to cope with merging of prototyped/non-prototyped
2991  // functions, etc.
2992  if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
2993  const auto *FuncY = cast<FunctionDecl>(Y);
2994  if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
2995  const auto *CtorY = cast<CXXConstructorDecl>(Y);
2996  if (CtorX->getInheritedConstructor() &&
2997  !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
2998  CtorY->getInheritedConstructor().getConstructor()))
2999  return false;
3000  }
3001 
3002  if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
3003  return false;
3004 
3005  // Multiversioned functions with different feature strings are represented
3006  // as separate declarations.
3007  if (FuncX->isMultiVersion()) {
3008  const auto *TAX = FuncX->getAttr<TargetAttr>();
3009  const auto *TAY = FuncY->getAttr<TargetAttr>();
3010  assert(TAX && TAY && "Multiversion Function without target attribute");
3011 
3012  if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
3013  return false;
3014  }
3015 
3016  ASTContext &C = FuncX->getASTContext();
3017  auto GetTypeAsWritten = [](const FunctionDecl *FD) {
3018  // Map to the first declaration that we've already merged into this one.
3019  // The TSI of redeclarations might not match (due to calling conventions
3020  // being inherited onto the type but not the TSI), but the TSI type of
3021  // the first declaration of the function should match across modules.
3022  FD = FD->getCanonicalDecl();
3023  return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3024  : FD->getType();
3025  };
3026  QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3027  if (!C.hasSameType(XT, YT)) {
3028  // We can get functions with different types on the redecl chain in C++17
3029  // if they have differing exception specifications and at least one of
3030  // the excpetion specs is unresolved.
3031  auto *XFPT = XT->getAs<FunctionProtoType>();
3032  auto *YFPT = YT->getAs<FunctionProtoType>();
3033  if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3034  (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3037  return true;
3038  return false;
3039  }
3040  return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3041  hasSameOverloadableAttrs(FuncX, FuncY);
3042  }
3043 
3044  // Variables with the same type and linkage match.
3045  if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3046  const auto *VarY = cast<VarDecl>(Y);
3047  if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3048  ASTContext &C = VarX->getASTContext();
3049  if (C.hasSameType(VarX->getType(), VarY->getType()))
3050  return true;
3051 
3052  // We can get decls with different types on the redecl chain. Eg.
3053  // template <typename T> struct S { static T Var[]; }; // #1
3054  // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3055  // Only? happens when completing an incomplete array type. In this case
3056  // when comparing #1 and #2 we should go through their element type.
3057  const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3058  const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3059  if (!VarXTy || !VarYTy)
3060  return false;
3061  if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3062  return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3063  }
3064  return false;
3065  }
3066 
3067  // Namespaces with the same name and inlinedness match.
3068  if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3069  const auto *NamespaceY = cast<NamespaceDecl>(Y);
3070  return NamespaceX->isInline() == NamespaceY->isInline();
3071  }
3072 
3073  // Identical template names and kinds match if their template parameter lists
3074  // and patterns match.
3075  if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3076  const auto *TemplateY = cast<TemplateDecl>(Y);
3077  return isSameEntity(TemplateX->getTemplatedDecl(),
3078  TemplateY->getTemplatedDecl()) &&
3079  isSameTemplateParameterList(TemplateX->getTemplateParameters(),
3080  TemplateY->getTemplateParameters());
3081  }
3082 
3083  // Fields with the same name and the same type match.
3084  if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3085  const auto *FDY = cast<FieldDecl>(Y);
3086  // FIXME: Also check the bitwidth is odr-equivalent, if any.
3087  return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3088  }
3089 
3090  // Indirect fields with the same target field match.
3091  if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3092  const auto *IFDY = cast<IndirectFieldDecl>(Y);
3093  return IFDX->getAnonField()->getCanonicalDecl() ==
3094  IFDY->getAnonField()->getCanonicalDecl();
3095  }
3096 
3097  // Enumerators with the same name match.
3098  if (isa<EnumConstantDecl>(X))
3099  // FIXME: Also check the value is odr-equivalent.
3100  return true;
3101 
3102  // Using shadow declarations with the same target match.
3103  if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3104  const auto *USY = cast<UsingShadowDecl>(Y);
3105  return USX->getTargetDecl() == USY->getTargetDecl();
3106  }
3107 
3108  // Using declarations with the same qualifier match. (We already know that
3109  // the name matches.)
3110  if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3111  const auto *UY = cast<UsingDecl>(Y);
3112  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3113  UX->hasTypename() == UY->hasTypename() &&
3114  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3115  }
3116  if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3117  const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3118  return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3119  UX->isAccessDeclaration() == UY->isAccessDeclaration();
3120  }
3121  if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3122  return isSameQualifier(
3123  UX->getQualifier(),
3124  cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3125 
3126  // Namespace alias definitions with the same target match.
3127  if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3128  const auto *NAY = cast<NamespaceAliasDecl>(Y);
3129  return NAX->getNamespace()->Equals(NAY->getNamespace());
3130  }
3131 
3132  return false;
3133 }
3134 
3135 /// Find the context in which we should search for previous declarations when
3136 /// looking for declarations to merge.
3137 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3138  DeclContext *DC) {
3139  if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3140  return ND->getOriginalNamespace();
3141 
3142  if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3143  // Try to dig out the definition.
3144  auto *DD = RD->DefinitionData;
3145  if (!DD)
3146  DD = RD->getCanonicalDecl()->DefinitionData;
3147 
3148  // If there's no definition yet, then DC's definition is added by an update
3149  // record, but we've not yet loaded that update record. In this case, we
3150  // commit to DC being the canonical definition now, and will fix this when
3151  // we load the update record.
3152  if (!DD) {
3153  DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3154  RD->setCompleteDefinition(true);
3155  RD->DefinitionData = DD;
3156  RD->getCanonicalDecl()->DefinitionData = DD;
3157 
3158  // Track that we did this horrible thing so that we can fix it later.
3159  Reader.PendingFakeDefinitionData.insert(
3160  std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3161  }
3162 
3163  return DD->Definition;
3164  }
3165 
3166  if (auto *ED = dyn_cast<EnumDecl>(DC))
3167  return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3168  : nullptr;
3169 
3170  // We can see the TU here only if we have no Sema object. In that case,
3171  // there's no TU scope to look in, so using the DC alone is sufficient.
3172  if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3173  return TU;
3174 
3175  return nullptr;
3176 }
3177 
3178 ASTDeclReader::FindExistingResult::~FindExistingResult() {
3179  // Record that we had a typedef name for linkage whether or not we merge
3180  // with that declaration.
3181  if (TypedefNameForLinkage) {
3182  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3183  Reader.ImportedTypedefNamesForLinkage.insert(
3184  std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3185  return;
3186  }
3187 
3188  if (!AddResult || Existing)
3189  return;
3190 
3191  DeclarationName Name = New->getDeclName();
3192  DeclContext *DC = New->getDeclContext()->getRedeclContext();
3194  setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3195  AnonymousDeclNumber, New);
3196  } else if (DC->isTranslationUnit() &&
3197  !Reader.getContext().getLangOpts().CPlusPlus) {
3198  if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3199  Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3200  .push_back(New);
3201  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3202  // Add the declaration to its redeclaration context so later merging
3203  // lookups will find it.
3204  MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3205  }
3206 }
3207 
3208 /// Find the declaration that should be merged into, given the declaration found
3209 /// by name lookup. If we're merging an anonymous declaration within a typedef,
3210 /// we need a matching typedef, and we merge with the type inside it.
3212  bool IsTypedefNameForLinkage) {
3213  if (!IsTypedefNameForLinkage)
3214  return Found;
3215 
3216  // If we found a typedef declaration that gives a name to some other
3217  // declaration, then we want that inner declaration. Declarations from
3218  // AST files are handled via ImportedTypedefNamesForLinkage.
3219  if (Found->isFromASTFile())
3220  return nullptr;
3221 
3222  if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3223  return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3224 
3225  return nullptr;
3226 }
3227 
3228 /// Find the declaration to use to populate the anonymous declaration table
3229 /// for the given lexical DeclContext. We only care about finding local
3230 /// definitions of the context; we'll merge imported ones as we go.
3231 DeclContext *
3232 ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3233  // For classes, we track the definition as we merge.
3234  if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3235  auto *DD = RD->getCanonicalDecl()->DefinitionData;
3236  return DD ? DD->Definition : nullptr;
3237  }
3238 
3239  // For anything else, walk its merged redeclarations looking for a definition.
3240  // Note that we can't just call getDefinition here because the redeclaration
3241  // chain isn't wired up.
3242  for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3243  if (auto *FD = dyn_cast<FunctionDecl>(D))
3244  if (FD->isThisDeclarationADefinition())
3245  return FD;
3246  if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3247  if (MD->isThisDeclarationADefinition())
3248  return MD;
3249  }
3250 
3251  // No merged definition yet.
3252  return nullptr;
3253 }
3254 
3255 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3256  DeclContext *DC,
3257  unsigned Index) {
3258  // If the lexical context has been merged, look into the now-canonical
3259  // definition.
3260  auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3261 
3262  // If we've seen this before, return the canonical declaration.
3263  auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3264  if (Index < Previous.size() && Previous[Index])
3265  return Previous[Index];
3266 
3267  // If this is the first time, but we have parsed a declaration of the context,
3268  // build the anonymous declaration list from the parsed declaration.
3269  auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3270  if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3271  numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3272  if (Previous.size() == Number)
3273  Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3274  else
3275  Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3276  });
3277  }
3278 
3279  return Index < Previous.size() ? Previous[Index] : nullptr;
3280 }
3281 
3282 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3283  DeclContext *DC, unsigned Index,
3284  NamedDecl *D) {
3285  auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3286 
3287  auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3288  if (Index >= Previous.size())
3289  Previous.resize(Index + 1);
3290  if (!Previous[Index])
3291  Previous[Index] = D;
3292 }
3293 
3294 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3295  DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3296  : D->getDeclName();
3297 
3298  if (!Name && !needsAnonymousDeclarationNumber(D)) {
3299  // Don't bother trying to find unnamed declarations that are in
3300  // unmergeable contexts.
3301  FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3302  AnonymousDeclNumber, TypedefNameForLinkage);
3303  Result.suppress();
3304  return Result;
3305  }
3306 
3308  if (TypedefNameForLinkage) {
3309  auto It = Reader.ImportedTypedefNamesForLinkage.find(
3310  std::make_pair(DC, TypedefNameForLinkage));
3311  if (It != Reader.ImportedTypedefNamesForLinkage.end())
3312  if (isSameEntity(It->second, D))
3313  return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3314  TypedefNameForLinkage);
3315  // Go on to check in other places in case an existing typedef name
3316  // was not imported.
3317  }
3318 
3320  // This is an anonymous declaration that we may need to merge. Look it up
3321  // in its context by number.
3322  if (auto *Existing = getAnonymousDeclForMerging(
3323  Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3324  if (isSameEntity(Existing, D))
3325  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3326  TypedefNameForLinkage);
3327  } else if (DC->isTranslationUnit() &&
3328  !Reader.getContext().getLangOpts().CPlusPlus) {
3329  IdentifierResolver &IdResolver = Reader.getIdResolver();
3330 
3331  // Temporarily consider the identifier to be up-to-date. We don't want to
3332  // cause additional lookups here.
3333  class UpToDateIdentifierRAII {
3334  IdentifierInfo *II;
3335  bool WasOutToDate = false;
3336 
3337  public:
3338  explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3339  if (II) {
3340  WasOutToDate = II->isOutOfDate();
3341  if (WasOutToDate)
3342  II->setOutOfDate(false);
3343  }
3344  }
3345 
3346  ~UpToDateIdentifierRAII() {
3347  if (WasOutToDate)
3348  II->setOutOfDate(true);
3349  }
3350  } UpToDate(Name.getAsIdentifierInfo());
3351 
3352  for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3353  IEnd = IdResolver.end();
3354  I != IEnd; ++I) {
3355  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3356  if (isSameEntity(Existing, D))
3357  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3358  TypedefNameForLinkage);
3359  }
3360  } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3361  DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3362  for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3363  if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3364  if (isSameEntity(Existing, D))
3365  return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3366  TypedefNameForLinkage);
3367  }
3368  } else {
3369  // Not in a mergeable context.
3370  return FindExistingResult(Reader);
3371  }
3372 
3373  // If this declaration is from a merged context, make a note that we need to
3374  // check that the canonical definition of that context contains the decl.
3375  //
3376  // FIXME: We should do something similar if we merge two definitions of the
3377  // same template specialization into the same CXXRecordDecl.
3378  auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3379  if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3380  MergedDCIt->second == D->getDeclContext())
3381  Reader.PendingOdrMergeChecks.push_back(D);
3382 
3383  return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3384  AnonymousDeclNumber, TypedefNameForLinkage);
3385 }
3386 
3387 template<typename DeclT>
3389  return D->RedeclLink.getLatestNotUpdated();
3390 }
3391 
3393  llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3394 }
3395 
3397  assert(D);
3398 
3399  switch (D->getKind()) {
3400 #define ABSTRACT_DECL(TYPE)
3401 #define DECL(TYPE, BASE) \
3402  case Decl::TYPE: \
3403  return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3404 #include "clang/AST/DeclNodes.inc"
3405  }
3406  llvm_unreachable("unknown decl kind");
3407 }
3408 
3409 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3411 }
3412 
3413 template<typename DeclT>
3416  Decl *Previous, Decl *Canon) {
3417  D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3418  D->First = cast<DeclT>(Previous)->First;
3419 }
3420 
3421 namespace clang {
3422 
3423 template<>
3426  Decl *Previous, Decl *Canon) {
3427  auto *VD = static_cast<VarDecl *>(D);
3428  auto *PrevVD = cast<VarDecl>(Previous);
3429  D->RedeclLink.setPrevious(PrevVD);
3430  D->First = PrevVD->First;
3431 
3432  // We should keep at most one definition on the chain.
3433  // FIXME: Cache the definition once we've found it. Building a chain with
3434  // N definitions currently takes O(N^2) time here.
3435  if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3436  for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3437  if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3438  Reader.mergeDefinitionVisibility(CurD, VD);
3439  VD->demoteThisDefinitionToDeclaration();
3440  break;
3441  }
3442  }
3443  }
3444 }
3445 
3447  auto *DT = T->getContainedDeducedType();
3448  return DT && !DT->isDeduced();
3449 }
3450 
3451 template<>
3454  Decl *Previous, Decl *Canon) {
3455  auto *FD = static_cast<FunctionDecl *>(D);
3456  auto *PrevFD = cast<FunctionDecl>(Previous);
3457 
3458  FD->RedeclLink.setPrevious(PrevFD);
3459  FD->First = PrevFD->First;
3460 
3461  // If the previous declaration is an inline function declaration, then this
3462  // declaration is too.
3463  if (PrevFD->isInlined() != FD->isInlined()) {
3464  // FIXME: [dcl.fct.spec]p4:
3465  // If a function with external linkage is declared inline in one
3466  // translation unit, it shall be declared inline in all translation
3467  // units in which it appears.
3468  //
3469  // Be careful of this case:
3470  //
3471  // module A:
3472  // template<typename T> struct X { void f(); };
3473  // template<typename T> inline void X<T>::f() {}
3474  //
3475  // module B instantiates the declaration of X<int>::f
3476  // module C instantiates the definition of X<int>::f
3477  //
3478  // If module B and C are merged, we do not have a violation of this rule.
3479  FD->setImplicitlyInline(true);
3480  }
3481 
3482  auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3483  auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3484  if (FPT && PrevFPT) {
3485  // If we need to propagate an exception specification along the redecl
3486  // chain, make a note of that so that we can do so later.
3487  bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3488  bool WasUnresolved =
3490  if (IsUnresolved != WasUnresolved)
3491  Reader.PendingExceptionSpecUpdates.insert(
3492  {Canon, IsUnresolved ? PrevFD : FD});
3493 
3494  // If we need to propagate a deduced return type along the redecl chain,
3495  // make a note of that so that we can do it later.
3496  bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3497  bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3498  if (IsUndeduced != WasUndeduced)
3499  Reader.PendingDeducedTypeUpdates.insert(
3500  {cast<FunctionDecl>(Canon),
3501  (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3502  }
3503 }
3504 
3505 } // namespace clang
3506 
3508  llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3509 }
3510 
3511 /// Inherit the default template argument from \p From to \p To. Returns
3512 /// \c false if there is no default template for \p From.
3513 template <typename ParmDecl>
3514 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3515  Decl *ToD) {
3516  auto *To = cast<ParmDecl>(ToD);
3517  if (!From->hasDefaultArgument())
3518  return false;
3519  To->setInheritedDefaultArgument(Context, From);
3520  return true;
3521 }
3522 
3524  TemplateDecl *From,
3525  TemplateDecl *To) {
3526  auto *FromTP = From->getTemplateParameters();
3527  auto *ToTP = To->getTemplateParameters();
3528  assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3529 
3530  for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3531  NamedDecl *FromParam = FromTP->getParam(I);
3532  NamedDecl *ToParam = ToTP->getParam(I);
3533 
3534  if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3535  inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3536  else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3537  inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3538  else
3540  Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3541  }
3542 }
3543 
3545  Decl *Previous, Decl *Canon) {
3546  assert(D && Previous);
3547 
3548  switch (D->getKind()) {
3549 #define ABSTRACT_DECL(TYPE)
3550 #define DECL(TYPE, BASE) \
3551  case Decl::TYPE: \
3552  attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3553  break;
3554 #include "clang/AST/DeclNodes.inc"
3555  }
3556 
3557  // If the declaration was visible in one module, a redeclaration of it in
3558  // another module remains visible even if it wouldn't be visible by itself.
3559  //
3560  // FIXME: In this case, the declaration should only be visible if a module
3561  // that makes it visible has been imported.
3562  D->IdentifierNamespace |=
3563  Previous->IdentifierNamespace &
3565 
3566  // If the declaration declares a template, it may inherit default arguments
3567  // from the previous declaration.
3568  if (auto *TD = dyn_cast<TemplateDecl>(D))
3570  cast<TemplateDecl>(Previous), TD);
3571 }
3572 
3573 template<typename DeclT>
3575  D->RedeclLink.setLatest(cast<DeclT>(Latest));
3576 }
3577 
3579  llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3580 }
3581 
3583  assert(D && Latest);
3584 
3585  switch (D->getKind()) {
3586 #define ABSTRACT_DECL(TYPE)
3587 #define DECL(TYPE, BASE) \
3588  case Decl::TYPE: \
3589  attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3590  break;
3591 #include "clang/AST/DeclNodes.inc"
3592  }
3593 }
3594 
3595 template<typename DeclT>
3597  D->RedeclLink.markIncomplete();
3598 }
3599 
3601  llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3602 }
3603 
3604 void ASTReader::markIncompleteDeclChain(Decl *D) {
3605  switch (D->getKind()) {
3606 #define ABSTRACT_DECL(TYPE)
3607 #define DECL(TYPE, BASE) \
3608  case Decl::TYPE: \
3609  ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3610  break;
3611 #include "clang/AST/DeclNodes.inc"
3612  }
3613 }
3614 
3615 /// Read the declaration at the given offset from the AST file.
3616 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3617  unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3618  SourceLocation DeclLoc;
3619  RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3620  llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3621  // Keep track of where we are in the stream, then jump back there
3622  // after reading this declaration.
3623  SavedStreamPosition SavedPosition(DeclsCursor);
3624 
3625  ReadingKindTracker ReadingKind(Read_Decl, *this);
3626 
3627  // Note that we are loading a declaration record.
3628  Deserializing ADecl(this);
3629 
3630  DeclsCursor.JumpToBit(Loc.Offset);
3631  ASTRecordReader Record(*this, *Loc.F);
3632  ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3633  unsigned Code = DeclsCursor.ReadCode();
3634 
3635  ASTContext &Context = getContext();
3636  Decl *D = nullptr;
3637  switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3638  case DECL_CONTEXT_LEXICAL:
3639  case DECL_CONTEXT_VISIBLE:
3640  llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3641  case DECL_TYPEDEF:
3642  D = TypedefDecl::CreateDeserialized(Context, ID);
3643  break;
3644  case DECL_TYPEALIAS:
3645  D = TypeAliasDecl::CreateDeserialized(Context, ID);
3646  break;
3647  case DECL_ENUM:
3648  D = EnumDecl::CreateDeserialized(Context, ID);
3649  break;
3650  case DECL_RECORD:
3651  D = RecordDecl::CreateDeserialized(Context, ID);
3652  break;
3653  case DECL_ENUM_CONSTANT:
3654  D = EnumConstantDecl::CreateDeserialized(Context, ID);
3655  break;
3656  case DECL_FUNCTION:
3657  D = FunctionDecl::CreateDeserialized(Context, ID);
3658  break;
3659  case DECL_LINKAGE_SPEC:
3660  D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3661  break;
3662  case DECL_EXPORT:
3663  D = ExportDecl::CreateDeserialized(Context, ID);
3664  break;
3665  case DECL_LABEL:
3666  D = LabelDecl::CreateDeserialized(Context, ID);
3667  break;
3668  case DECL_NAMESPACE:
3669  D = NamespaceDecl::CreateDeserialized(Context, ID);
3670  break;
3671  case DECL_NAMESPACE_ALIAS:
3672  D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3673  break;
3674  case DECL_USING:
3675  D = UsingDecl::CreateDeserialized(Context, ID);
3676  break;
3677  case DECL_USING_PACK:
3678  D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3679  break;
3680  case DECL_USING_SHADOW:
3681  D = UsingShadowDecl::CreateDeserialized(Context, ID);
3682  break;
3685  break;
3686  case DECL_USING_DIRECTIVE:
3687  D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3688  break;
3691  break;
3694  break;
3695  case DECL_CXX_RECORD:
3696  D = CXXRecordDecl::CreateDeserialized(Context, ID);
3697  break;
3700  break;
3701  case DECL_CXX_METHOD:
3702  D = CXXMethodDecl::CreateDeserialized(Context, ID);
3703  break;
3704  case DECL_CXX_CONSTRUCTOR:
3705  D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3706  break;
3708  D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3709  break;
3710  case DECL_CXX_DESTRUCTOR:
3711  D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3712  break;
3713  case DECL_CXX_CONVERSION:
3714  D = CXXConversionDecl::CreateDeserialized(Context, ID);
3715  break;
3716  case DECL_ACCESS_SPEC:
3717  D = AccessSpecDecl::CreateDeserialized(Context, ID);
3718  break;
3719  case DECL_FRIEND:
3720  D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3721  break;
3722  case DECL_FRIEND_TEMPLATE:
3723  D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3724  break;
3725  case DECL_CLASS_TEMPLATE:
3726  D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3727  break;
3730  break;
3733  break;
3734  case DECL_VAR_TEMPLATE:
3735  D = VarTemplateDecl::CreateDeserialized(Context, ID);
3736  break;
3739  break;
3742  break;
3745  break;
3748  break;
3751  break;
3754  break;
3757  Record.readInt());
3758  break;
3761  break;
3764  Record.readInt());
3765  break;
3768  break;
3769  case DECL_STATIC_ASSERT:
3770  D = StaticAssertDecl::CreateDeserialized(Context, ID);
3771  break;
3772  case DECL_OBJC_METHOD:
3773  D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3774  break;
3775  case DECL_OBJC_INTERFACE:
3776  D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3777  break;
3778  case DECL_OBJC_IVAR:
3779  D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3780  break;
3781  case DECL_OBJC_PROTOCOL:
3782  D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3783  break;
3785  D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3786  break;
3787  case DECL_OBJC_CATEGORY:
3788  D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3789  break;
3792  break;
3795  break;
3798  break;
3799  case DECL_OBJC_PROPERTY:
3800  D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3801  break;
3804  break;
3805  case DECL_FIELD:
3806  D = FieldDecl::CreateDeserialized(Context, ID);
3807  break;
3808  case DECL_INDIRECTFIELD:
3809  D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3810  break;
3811  case DECL_VAR:
3812  D = VarDecl::CreateDeserialized(Context, ID);
3813  break;
3814  case DECL_IMPLICIT_PARAM:
3815  D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3816  break;
3817  case DECL_PARM_VAR:
3818  D = ParmVarDecl::CreateDeserialized(Context, ID);
3819  break;
3820  case DECL_DECOMPOSITION:
3821  D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3822  break;
3823  case DECL_BINDING:
3824  D = BindingDecl::CreateDeserialized(Context, ID);
3825  break;
3826  case DECL_FILE_SCOPE_ASM:
3827  D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3828  break;
3829  case DECL_BLOCK:
3830  D = BlockDecl::CreateDeserialized(Context, ID);
3831  break;
3832  case DECL_MS_PROPERTY:
3833  D = MSPropertyDecl::CreateDeserialized(Context, ID);
3834  break;
3835  case DECL_CAPTURED:
3836  D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3837  break;
3839  Error("attempt to read a C++ base-specifier record as a declaration");
3840  return nullptr;
3842  Error("attempt to read a C++ ctor initializer record as a declaration");
3843  return nullptr;
3844  case DECL_IMPORT:
3845  // Note: last entry of the ImportDecl record is the number of stored source
3846  // locations.
3847  D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3848  break;
3850  D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3851  break;
3852  case DECL_OMP_REQUIRES:
3853  D = OMPRequiresDecl::CreateDeserialized(Context, ID, Record.readInt());
3854  break;
3857  break;
3858  case DECL_OMP_CAPTUREDEXPR:
3859  D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3860  break;
3861  case DECL_PRAGMA_COMMENT:
3862  D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3863  break;
3866  Record.readInt());
3867  break;
3868  case DECL_EMPTY:
3869  D = EmptyDecl::CreateDeserialized(Context, ID);
3870  break;
3871  case DECL_OBJC_TYPE_PARAM:
3872  D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3873  break;
3874  }
3875 
3876  assert(D && "Unknown declaration reading AST file");
3877  LoadedDecl(Index, D);
3878  // Set the DeclContext before doing any deserialization, to make sure internal
3879  // calls to Decl::getASTContext() by Decl's methods will find the
3880  // TranslationUnitDecl without crashing.
3881  D->setDeclContext(Context.getTranslationUnitDecl());
3882  Reader.Visit(D);
3883 
3884  // If this declaration is also a declaration context, get the
3885  // offsets for its tables of lexical and visible declarations.
3886  if (auto *DC = dyn_cast<DeclContext>(D)) {
3887  std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3888  if (Offsets.first &&
3889  ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3890  return nullptr;
3891  if (Offsets.second &&
3892  ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3893  return nullptr;
3894  }
3895  assert(Record.getIdx() == Record.size());
3896 
3897  // Load any relevant update records.
3898  PendingUpdateRecords.push_back(
3899  PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3900 
3901  // Load the categories after recursive loading is finished.
3902  if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3903  // If we already have a definition when deserializing the ObjCInterfaceDecl,
3904  // we put the Decl in PendingDefinitions so we can pull the categories here.
3905  if (Class->isThisDeclarationADefinition() ||
3906  PendingDefinitions.count(Class))
3907  loadObjCCategories(ID, Class);
3908 
3909  // If we have deserialized a declaration that has a definition the
3910  // AST consumer might need to know about, queue it.
3911  // We don't pass it to the consumer immediately because we may be in recursive
3912  // loading, and some declarations may still be initializing.
3913  PotentiallyInterestingDecls.push_back(
3914  InterestingDecl(D, Reader.hasPendingBody()));
3915 
3916  return D;
3917 }
3918 
3919 void ASTReader::PassInterestingDeclsToConsumer() {
3920  assert(Consumer);
3921 
3922  if (PassingDeclsToConsumer)
3923  return;
3924 
3925  // Guard variable to avoid recursively redoing the process of passing
3926  // decls to consumer.
3927  SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3928  true);
3929 
3930  // Ensure that we've loaded all potentially-interesting declarations
3931  // that need to be eagerly loaded.
3932  for (auto ID : EagerlyDeserializedDecls)
3933  GetDecl(ID);
3934  EagerlyDeserializedDecls.clear();
3935 
3936  while (!PotentiallyInterestingDecls.empty()) {
3937  InterestingDecl D = PotentiallyInterestingDecls.front();
3938  PotentiallyInterestingDecls.pop_front();
3939  if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3940  PassInterestingDeclToConsumer(D.getDecl());
3941  }
3942 }
3943 
3944 void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3945  // The declaration may have been modified by files later in the chain.
3946  // If this is the case, read the record containing the updates from each file
3947  // and pass it to ASTDeclReader to make the modifications.
3948  serialization::GlobalDeclID ID = Record.ID;
3949  Decl *D = Record.D;
3950  ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3951  DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3952 
3953  SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3954 
3955  if (UpdI != DeclUpdateOffsets.end()) {
3956  auto UpdateOffsets = std::move(UpdI->second);
3957  DeclUpdateOffsets.erase(UpdI);
3958 
3959  // Check if this decl was interesting to the consumer. If we just loaded
3960  // the declaration, then we know it was interesting and we skip the call
3961  // to isConsumerInterestedIn because it is unsafe to call in the
3962  // current ASTReader state.
3963  bool WasInteresting =
3964  Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
3965  for (auto &FileAndOffset : UpdateOffsets) {
3966  ModuleFile *F = FileAndOffset.first;
3967  uint64_t Offset = FileAndOffset.second;
3968  llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3969  SavedStreamPosition SavedPosition(Cursor);
3970  Cursor.JumpToBit(Offset);
3971  unsigned Code = Cursor.ReadCode();
3972  ASTRecordReader Record(*this, *F);
3973  unsigned RecCode = Record.readRecord(Cursor, Code);
3974  (void)RecCode;
3975  assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3976 
3977  ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
3978  SourceLocation());
3979  Reader.UpdateDecl(D, PendingLazySpecializationIDs);
3980 
3981  // We might have made this declaration interesting. If so, remember that
3982  // we need to hand it off to the consumer.
3983  if (!WasInteresting &&
3984  isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
3985  PotentiallyInterestingDecls.push_back(
3986  InterestingDecl(D, Reader.hasPendingBody()));
3987  WasInteresting = true;
3988  }
3989  }
3990  }
3991  // Add the lazy specializations to the template.
3992  assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||
3993  isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&
3994  "Must not have pending specializations");
3995  if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
3996  ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
3997  else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
3998  ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
3999  else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4000  ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4001  PendingLazySpecializationIDs.clear();
4002 
4003  // Load the pending visible updates for this decl context, if it has any.
4004  auto I = PendingVisibleUpdates.find(ID);
4005  if (I != PendingVisibleUpdates.end()) {
4006  auto VisibleUpdates = std::move(I->second);
4007  PendingVisibleUpdates.erase(I);
4008 
4009  auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4010  for (const auto &Update : VisibleUpdates)
4011  Lookups[DC].Table.add(
4012  Update.Mod, Update.Data,
4014  DC->setHasExternalVisibleStorage(true);
4015  }
4016 }
4017 
4018 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4019  // Attach FirstLocal to the end of the decl chain.
4020  Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4021  if (FirstLocal != CanonDecl) {
4022  Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4024  *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4025  CanonDecl);
4026  }
4027 
4028  if (!LocalOffset) {
4029  ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4030  return;
4031  }
4032 
4033  // Load the list of other redeclarations from this module file.
4034  ModuleFile *M = getOwningModuleFile(FirstLocal);
4035  assert(M && "imported decl from no module file");
4036 
4037  llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4038  SavedStreamPosition SavedPosition(Cursor);
4039  Cursor.JumpToBit(LocalOffset);
4040 
4041  RecordData Record;
4042  unsigned Code = Cursor.ReadCode();
4043  unsigned RecCode = Cursor.readRecord(Code, Record);
4044  (void)RecCode;
4045  assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
4046 
4047  // FIXME: We have several different dispatches on decl kind here; maybe
4048  // we should instead generate one loop per kind and dispatch up-front?
4049  Decl *MostRecent = FirstLocal;
4050  for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4051  auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4052  ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4053  MostRecent = D;
4054  }
4055  ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4056 }
4057 
4058 namespace {
4059 
4060  /// Given an ObjC interface, goes through the modules and links to the
4061  /// interface all the categories for it.
4062  class ObjCCategoriesVisitor {
4063  ASTReader &Reader;
4064  ObjCInterfaceDecl *Interface;
4065  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4066  ObjCCategoryDecl *Tail = nullptr;
4067  llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4068  serialization::GlobalDeclID InterfaceID;
4069  unsigned PreviousGeneration;
4070 
4071  void add(ObjCCategoryDecl *Cat) {
4072  // Only process each category once.
4073  if (!Deserialized.erase(Cat))
4074  return;
4075 
4076  // Check for duplicate categories.
4077  if (Cat->getDeclName()) {
4078  ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4079  if (Existing &&
4080  Reader.getOwningModuleFile(Existing)
4081  != Reader.getOwningModuleFile(Cat)) {
4082  // FIXME: We should not warn for duplicates in diamond:
4083  //
4084  // MT //
4085  // / \ //
4086  // ML MR //
4087  // \ / //
4088  // MB //
4089  //
4090  // If there are duplicates in ML/MR, there will be warning when
4091  // creating MB *and* when importing MB. We should not warn when
4092  // importing.
4093  Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4094  << Interface->getDeclName() << Cat->getDeclName();
4095  Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4096  } else if (!Existing) {
4097  // Record this category.
4098  Existing = Cat;
4099  }
4100  }
4101 
4102  // Add this category to the end of the chain.
4103  if (Tail)
4105  else
4106  Interface->setCategoryListRaw(Cat);
4107  Tail = Cat;
4108  }
4109 
4110  public:
4111  ObjCCategoriesVisitor(ASTReader &Reader,
4112  ObjCInterfaceDecl *Interface,
4113  llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4114  serialization::GlobalDeclID InterfaceID,
4115  unsigned PreviousGeneration)
4116  : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4117  InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4118  // Populate the name -> category map with the set of known categories.
4119  for (auto *Cat : Interface->known_categories()) {
4120  if (Cat->getDeclName())
4121  NameCategoryMap[Cat->getDeclName()] = Cat;
4122 
4123  // Keep track of the tail of the category list.
4124  Tail = Cat;
4125  }
4126  }
4127 
4128  bool operator()(ModuleFile &M) {
4129  // If we've loaded all of the category information we care about from
4130  // this module file, we're done.
4131  if (M.Generation <= PreviousGeneration)
4132  return true;
4133 
4134  // Map global ID of the definition down to the local ID used in this
4135  // module file. If there is no such mapping, we'll find nothing here
4136  // (or in any module it imports).
4137  DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4138  if (!LocalID)
4139  return true;
4140 
4141  // Perform a binary search to find the local redeclarations for this
4142  // declaration (if any).
4143  const ObjCCategoriesInfo Compare = { LocalID, 0 };
4144  const ObjCCategoriesInfo *Result
4145  = std::lower_bound(M.ObjCCategoriesMap,
4147  Compare);
4148  if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4149  Result->DefinitionID != LocalID) {
4150  // We didn't find anything. If the class definition is in this module
4151  // file, then the module files it depends on cannot have any categories,
4152  // so suppress further lookup.
4153  return Reader.isDeclIDFromModule(InterfaceID, M);
4154  }
4155 
4156  // We found something. Dig out all of the categories.
4157  unsigned Offset = Result->Offset;
4158  unsigned N = M.ObjCCategories[Offset];
4159  M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4160  for (unsigned I = 0; I != N; ++I)
4161  add(cast_or_null<ObjCCategoryDecl>(
4162  Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4163  return true;
4164  }
4165  };
4166 
4167 } // namespace
4168 
4169 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4170  ObjCInterfaceDecl *D,
4171  unsigned PreviousGeneration) {
4172  ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4173  PreviousGeneration);
4174  ModuleMgr.visit(Visitor);
4175 }
4176 
4177 template<typename DeclT, typename Fn>
4178 static void forAllLaterRedecls(DeclT *D, Fn F) {
4179  F(D);
4180 
4181  // Check whether we've already merged D into its redeclaration chain.
4182  // MostRecent may or may not be nullptr if D has not been merged. If
4183  // not, walk the merged redecl chain and see if it's there.
4184  auto *MostRecent = D->getMostRecentDecl();
4185  bool Found = false;
4186  for (auto *Redecl = MostRecent; Redecl && !Found;
4187  Redecl = Redecl->getPreviousDecl())
4188  Found = (Redecl == D);
4189 
4190  // If this declaration is merged, apply the functor to all later decls.
4191  if (Found) {
4192  for (auto *Redecl = MostRecent; Redecl != D;
4193  Redecl = Redecl->getPreviousDecl())
4194  F(Redecl);
4195  }
4196 }
4197 
4199  llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4200  while (Record.getIdx() < Record.size()) {
4201  switch ((DeclUpdateKind)Record.readInt()) {
4203  auto *RD = cast<CXXRecordDecl>(D);
4204  // FIXME: If we also have an update record for instantiating the
4205  // definition of D, we need that to happen before we get here.
4206  Decl *MD = Record.readDecl();
4207  assert(MD && "couldn't read decl from update record");
4208  // FIXME: We should call addHiddenDecl instead, to add the member
4209  // to its DeclContext.
4210  RD->addedMember(MD);
4211  break;
4212  }
4213 
4215  // It will be added to the template's lazy specialization set.
4216  PendingLazySpecializationIDs.push_back(ReadDeclID());
4217  break;
4218 
4220  auto *Anon = ReadDeclAs<NamespaceDecl>();
4221 
4222  // Each module has its own anonymous namespace, which is disjoint from
4223  // any other module's anonymous namespaces, so don't attach the anonymous
4224  // namespace at all.
4225  if (!Record.isModule()) {
4226  if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4227  TU->setAnonymousNamespace(Anon);
4228  else
4229  cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4230  }
4231  break;
4232  }
4233 
4235  auto *VD = cast<VarDecl>(D);
4236  VD->NonParmVarDeclBits.IsInline = Record.readInt();
4237  VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4238  uint64_t Val = Record.readInt();
4239  if (Val && !VD->getInit()) {
4240  VD->setInit(Record.readExpr());
4241  if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4242  EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4243  Eval->CheckedICE = true;
4244  Eval->IsICE = Val == 3;
4245  }
4246  }
4247  break;
4248  }
4249 
4251  SourceLocation POI = Record.readSourceLocation();
4252  if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4253  VTSD->setPointOfInstantiation(POI);
4254  } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4255  VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4256  } else {
4257  auto *FD = cast<FunctionDecl>(D);
4258  if (auto *FTSInfo = FD->TemplateOrSpecialization
4259  .dyn_cast<FunctionTemplateSpecializationInfo *>())
4260  FTSInfo->setPointOfInstantiation(POI);
4261  else
4262  FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4263  ->setPointOfInstantiation(POI);
4264  }
4265  break;
4266  }
4267 
4269  auto *Param = cast<ParmVarDecl>(D);
4270 
4271  // We have to read the default argument regardless of whether we use it
4272  // so that hypothetical further update records aren't messed up.
4273  // TODO: Add a function to skip over the next expr record.
4274  auto *DefaultArg = Record.readExpr();
4275 
4276  // Only apply the update if the parameter still has an uninstantiated
4277  // default argument.
4278  if (Param->hasUninstantiatedDefaultArg())
4279  Param->setDefaultArg(DefaultArg);
4280  break;
4281  }
4282 
4284  auto *FD = cast<FieldDecl>(D);
4285  auto *DefaultInit = Record.readExpr();
4286 
4287  // Only apply the update if the field still has an uninstantiated
4288  // default member initializer.
4289  if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4290  if (DefaultInit)
4291  FD->setInClassInitializer(DefaultInit);
4292  else
4293  // Instantiation failed. We can get here if we serialized an AST for
4294  // an invalid program.
4295  FD->removeInClassInitializer();
4296  }
4297  break;
4298  }
4299 
4301  auto *FD = cast<FunctionDecl>(D);
4302  if (Reader.PendingBodies[FD]) {
4303  // FIXME: Maybe check for ODR violations.
4304  // It's safe to stop now because this update record is always last.
4305  return;
4306  }
4307 
4308  if (Record.readInt()) {
4309  // Maintain AST consistency: any later redeclarations of this function
4310  // are inline if this one is. (We might have merged another declaration
4311  // into this one.)
4312  forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4313  FD->setImplicitlyInline();
4314  });
4315  }
4316  FD->setInnerLocStart(ReadSourceLocation());
4317  ReadFunctionDefinition(FD);
4318  assert(Record.getIdx() == Record.size() && "lazy body must be last");
4319  break;
4320  }
4321 
4323  auto *RD = cast<CXXRecordDecl>(D);
4324  auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4325  bool HadRealDefinition =
4326  OldDD && (OldDD->Definition != RD ||
4327  !Reader.PendingFakeDefinitionData.count(OldDD));
4328  RD->setParamDestroyedInCallee(Record.readInt());
4329  RD->setArgPassingRestrictions(
4330  (RecordDecl::ArgPassingKind)Record.readInt());
4331  ReadCXXRecordDefinition(RD, /*Update*/true);
4332 
4333  // Visible update is handled separately.
4334  uint64_t LexicalOffset = ReadLocalOffset();
4335  if (!HadRealDefinition && LexicalOffset) {
4336  Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4337  Reader.PendingFakeDefinitionData.erase(OldDD);
4338  }
4339 
4340  auto TSK = (TemplateSpecializationKind)Record.readInt();
4341  SourceLocation POI = ReadSourceLocation();
4342  if (MemberSpecializationInfo *MSInfo =
4343  RD->getMemberSpecializationInfo()) {
4344  MSInfo->setTemplateSpecializationKind(TSK);
4345  MSInfo->setPointOfInstantiation(POI);
4346  } else {
4347  auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4348  Spec->setTemplateSpecializationKind(TSK);
4349  Spec->setPointOfInstantiation(POI);
4350 
4351  if (Record.readInt()) {
4352  auto *PartialSpec =
4353  ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4355  Record.readTemplateArgumentList(TemplArgs);
4356  auto *TemplArgList = TemplateArgumentList::CreateCopy(
4357  Reader.getContext(), TemplArgs);
4358 
4359  // FIXME: If we already have a partial specialization set,
4360  // check that it matches.
4361  if (!Spec->getSpecializedTemplateOrPartial()
4363  Spec->setInstantiationOf(PartialSpec, TemplArgList);
4364  }
4365  }
4366 
4367  RD->setTagKind((TagTypeKind)Record.readInt());
4368  RD->setLocation(ReadSourceLocation());
4369  RD->setLocStart(ReadSourceLocation());
4370  RD->setBraceRange(ReadSourceRange());
4371 
4372  if (Record.readInt()) {
4373  AttrVec Attrs;
4374  Record.readAttributes(Attrs);
4375  // If the declaration already has attributes, we assume that some other
4376  // AST file already loaded them.
4377  if (!D->hasAttrs())
4378  D->setAttrsImpl(Attrs, Reader.getContext());
4379  }
4380  break;
4381  }
4382 
4384  // Set the 'operator delete' directly to avoid emitting another update
4385  // record.
4386  auto *Del = ReadDeclAs<FunctionDecl>();
4387  auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4388  auto *ThisArg = Record.readExpr();
4389  // FIXME: Check consistency if we have an old and new operator delete.
4390  if (!First->OperatorDelete) {
4391  First->OperatorDelete = Del;
4392  First->OperatorDeleteThisArg = ThisArg;
4393  }
4394  break;
4395  }
4396 
4399  SmallVector<QualType, 8> ExceptionStorage;
4400  Record.readExceptionSpec(ExceptionStorage, ESI);
4401 
4402  // Update this declaration's exception specification, if needed.
4403  auto *FD = cast<FunctionDecl>(D);
4404  auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4405  // FIXME: If the exception specification is already present, check that it
4406  // matches.
4407  if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4408  FD->setType(Reader.getContext().getFunctionType(
4409  FPT->getReturnType(), FPT->getParamTypes(),
4410  FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4411 
4412  // When we get to the end of deserializing, see if there are other decls
4413  // that we need to propagate this exception specification onto.
4414  Reader.PendingExceptionSpecUpdates.insert(
4415  std::make_pair(FD->getCanonicalDecl(), FD));
4416  }
4417  break;
4418  }
4419 
4421  auto *FD = cast<FunctionDecl>(D);
4422  QualType DeducedResultType = Record.readType();
4423  Reader.PendingDeducedTypeUpdates.insert(
4424  {FD->getCanonicalDecl(), DeducedResultType});
4425  break;
4426  }
4427 
4428  case UPD_DECL_MARKED_USED:
4429  // Maintain AST consistency: any later redeclarations are used too.
4430  D->markUsed(Reader.getContext());
4431  break;
4432 
4433  case UPD_MANGLING_NUMBER:
4434  Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4435  Record.readInt());
4436  break;
4437 
4439  Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4440  Record.readInt());
4441  break;
4442 
4444  D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4445  ReadSourceRange()));
4446  break;
4447 
4448  case UPD_DECL_EXPORTED: {
4449  unsigned SubmoduleID = readSubmoduleID();
4450  auto *Exported = cast<NamedDecl>(D);
4451  Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4452  Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4453  Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4454  break;
4455  }
4456 
4458  D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4459  Reader.getContext(),
4460  static_cast<OMPDeclareTargetDeclAttr::MapTypeTy>(Record.readInt()),
4461  ReadSourceRange()));
4462  break;
4463 
4465  AttrVec Attrs;
4466  Record.readAttributes(Attrs);
4467  assert(Attrs.size() == 1);
4468  D->addAttr(Attrs[0]);
4469  break;
4470  }
4471  }
4472 }
const uint64_t & readInt()
Returns the current value in this record, and advances to the next value.
Definition: ASTReader.h:2401
RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD)
void VisitTypeDecl(TypeDecl *TD)
void setCategoryNameLoc(SourceLocation Loc)
Definition: DeclObjC.h:2406
A FriendTemplateDecl record.
Definition: ASTBitCodes.h:1458
void setHasSkippedBody(bool Skipped=true)
Definition: Decl.h:2217
Defines the clang::ASTContext interface.
A NonTypeTemplateParmDecl record.
Definition: ASTBitCodes.h:1485
static bool isUndeducedReturnType(QualType T)
void setScopeInfo(unsigned scopeDepth, unsigned parameterIndex)
Definition: Decl.h:1584
Decl * GetLocalDecl(ModuleFile &F, uint32_t LocalID)
Reads a declaration with the given local ID in the given module.
Definition: ASTReader.h:1842
SourceLocation readSourceLocation()
Read a source location, advancing Idx.
Definition: ASTReader.h:2598
void VisitClassScopeFunctionSpecializationDecl(ClassScopeFunctionSpecializationDecl *D)
static const Decl * getCanonicalDecl(const Decl *D)
void setImplicit(bool I=true)
Definition: DeclBase.h:548
Represents a function declaration or definition.
Definition: Decl.h:1739
void setInitializerData(Expr *OrigE, Expr *PrivE)
Set initializer Orig and Priv vars.
Definition: DeclOpenMP.h:189
void setNonTrivialToPrimitiveDestroy(bool V)
Definition: Decl.h:3721
void VisitVarDecl(VarDecl *VD)
#define MATCH_FIELD(Field)
void setAnonymousStructOrUnion(bool Anon)
Definition: Decl.h:3679
A class which contains all the information about a particular captured value.
Definition: Decl.h:3873
static ImportDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumLocations)
Create a new, deserialized module import declaration.
Definition: Decl.cpp:4687
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
void VisitImportDecl(ImportDecl *D)
A (possibly-)qualified type.
Definition: Type.h:642
void mergeMergeable(Mergeable< T > *D)
Attempts to merge the given declaration (D) with another declaration of the same entity, for the case where the entity is not actually redeclarable.
static ObjCIvarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:1784
FunctionDecl * Function
The function template specialization that this structure describes.
Definition: DeclTemplate.h:530
Static storage duration.
Definition: Specifiers.h:281
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:3181
void VisitUsingDecl(UsingDecl *D)
static UnresolvedUsingValueDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2790
static VarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:1925
void setLParenLoc(SourceLocation L)
Definition: DeclObjC.h:817
bool tryAddTopLevelDecl(NamedDecl *D, DeclarationName Name)
Try to add the given declaration to the top level scope, if it (or a redeclaration of it) hasn&#39;t alre...
void VisitFieldDecl(FieldDecl *FD)
void VisitImplicitParamDecl(ImplicitParamDecl *PD)
This declaration has an owning module, but is only visible to lookups that occur within that module...
An OMPThreadPrivateDecl record.
Definition: ASTBitCodes.h:1521
void setNonTrivialToPrimitiveDefaultInitialize(bool V)
Definition: Decl.h:3705
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:2373
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3361
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:2795
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:3208
No linkage, which means that the entity is unique and can only be referred to from within its scope...
Definition: Linkage.h:27
StorageClass getStorageClass() const
Returns the storage class as written in the source.
Definition: Decl.h:1019
unsigned Generation
The generation of which this module file is a part.
Definition: Module.h:175
static AccessSpecDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:59
Represents the declaration of a typedef-name via the &#39;typedef&#39; type specifier.
Definition: Decl.h:3027
C Language Family Type Representation.
void setParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4104
Microsoft&#39;s &#39;__super&#39; specifier, stored as a CXXRecordDecl* of the class it appeared in...
An OMPDeclareReductionDecl record.
Definition: ASTBitCodes.h:1542
void VisitEnumConstantDecl(EnumConstantDecl *ECD)
static PragmaCommentDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned ArgSize)
Definition: Decl.cpp:4341
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:8462
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:1476
void setArgPassingRestrictions(ArgPassingKind Kind)
Definition: Decl.h:3736
Selector getObjCSelector() const
Get the Objective-C selector stored in this declaration name.
NestedNameSpecifier * getPrefix() const
Return the prefix of this nested name specifier.
void setDefaultArgument(const ASTContext &C, const TemplateArgumentLoc &DefArg)
Set the default argument for this template parameter, and whether that default argument was inherited...
Defines the C++ template declaration subclasses.
NamedDecl * getTemplatedDecl() const
Get the underlying, templated declaration.
Definition: DeclTemplate.h:453
void setPure(bool P=true)
Definition: Decl.cpp:2747
static Decl * getMostRecentDecl(Decl *D)
known_categories_range known_categories() const
Definition: DeclObjC.h:1679
void VisitCXXDestructorDecl(CXXDestructorDecl *D)
void VisitClassTemplateSpecializationDecl(ClassTemplateSpecializationDecl *D)
A record that stores the set of declarations that are lexically stored within a given DeclContext...
Definition: ASTBitCodes.h:1383
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:4268
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:4279
unsigned LocalNumObjCCategoriesInMap
The number of redeclaration info entries in ObjCCategoriesMap.
Definition: Module.h:439
Class that performs name lookup into a DeclContext stored in an AST file.
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2818
Declaration of a variable template.
Represent a C++ namespace.
Definition: Decl.h:514
A ObjCPropertyDecl record.
Definition: ASTBitCodes.h:1340
void setPropertyImplementation(PropertyControl pc)
Definition: DeclObjC.h:921
bool hasRedeclaration() const
True if redeclared in the same interface.
Definition: DeclObjC.h:272
static bool hasSameOverloadableAttrs(const FunctionDecl *A, const FunctionDecl *B)
Determine whether the attributes we can overload on are identical for A and B.
NamedDecl * getParam(unsigned Idx)
Definition: DeclTemplate.h:133
static FriendDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned FriendTypeNumTPLists)
Definition: DeclFriend.cpp:66
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:98
A container of type source information.
Definition: Decl.h:86
uint64_t GlobalBitOffset
The global bit offset (or base) of this module.
Definition: Module.h:185
void readQualifierInfo(QualifierInfo &Info)
Definition: ASTReader.h:2544
void setPropertyAccessor(bool isAccessor)
Definition: DeclObjC.h:428
static void inheritDefaultTemplateArguments(ASTContext &Context, TemplateDecl *From, TemplateDecl *To)
ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record, ASTReader::RecordLocation Loc, DeclID thisDeclID, SourceLocation ThisDeclLoc)
Describes the capture of a variable or of this, or of a C++1y init-capture.
Definition: LambdaCapture.h:26
An OMPRequiresDecl record.
Definition: ASTBitCodes.h:1524
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2481
This is a module that was defined by a module map and built out of header files.
Definition: Module.h:76
static CapturedDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumParams)
Definition: Decl.cpp:4474
QualType getElementType() const
Definition: Type.h:2853
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3178
Represents a #pragma comment line.
Definition: Decl.h:139
A ClassTemplateDecl record.
Definition: ASTBitCodes.h:1461
void VisitStaticAssertDecl(StaticAssertDecl *D)
A PragmaDetectMismatchDecl record.
Definition: ASTBitCodes.h:1539
An UnresolvedUsingTypenameDecl record.
Definition: ASTBitCodes.h:1422
An identifier, stored as an IdentifierInfo*.
void setNothrow(bool Nothrow=true)
Definition: Decl.cpp:4484
void setRAngleLoc(SourceLocation Loc)
Definition: TemplateBase.h:572
FriendDecl - Represents the declaration of a friend entity, which can be a function, a type, or a templated function or type.
Definition: DeclFriend.h:54
unsigned getODRHash()
Definition: Decl.cpp:4088
Represents a variable declaration or definition.
Definition: Decl.h:812
void VisitNamedDecl(NamedDecl *ND)
Declaration of a redeclarable template.
Definition: DeclTemplate.h:737
An OMPCapturedExprDecl record.
Definition: ASTBitCodes.h:1533
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6716
A UsingShadowDecl record.
Definition: ASTBitCodes.h:1410
const unsigned int NUM_PREDEF_DECL_IDS
The number of declaration IDs that are predefined.
Definition: ASTBitCodes.h:1277
The "__interface" keyword.
Definition: Type.h:5022
Represents a variable template specialization, which refers to a variable template with a given set o...
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
A TemplateTemplateParmDecl record that stores an expanded template template parameter pack...
Definition: ASTBitCodes.h:1511
A namespace, stored as a NamespaceDecl*.
void VisitClassTemplateDecl(ClassTemplateDecl *D)
Stores a list of template parameters for a TemplateDecl and its derived classes.
Definition: DeclTemplate.h:68
unsigned getODRHash() const
Definition: DeclCXX.cpp:475
void setSelfDecl(ImplicitParamDecl *SD)
Definition: DeclObjC.h:407
void VisitTypeAliasDecl(TypeAliasDecl *TD)
SpecifierKind getKind() const
Determine what kind of nested name specifier is stored.
void setCombinerData(Expr *InE, Expr *OutE)
Set combiner In and Out vars.
Definition: DeclOpenMP.h:164
A TemplateTemplateParmDecl record.
Definition: ASTBitCodes.h:1488
Represents a parameter to a function.
Definition: Decl.h:1551
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:24
A ObjCInterfaceDecl record.
Definition: ASTBitCodes.h:1316
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:1443
Represents a struct/union/class.
Definition: Decl.h:3602
Description of a constructor that was inherited from a base class.
Definition: DeclCXX.h:2455
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:297
Provides common interface for the Decls that can be redeclared.
Definition: Redeclarable.h:85
ObjCProtocolDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this Objective-C protocol.
Definition: DeclObjC.h:2242
Represents a class template specialization, which refers to a class template with a given set of temp...
One of these records is kept for each identifier that is lexed.
void setIntegerType(QualType T)
Set the underlying integer type.
Definition: Decl.h:3498
T * readDeclAs()
Reads a declaration from the given position in the record, advancing Idx.
Definition: ASTReader.h:2520
void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D)
void mergeRedeclarable(Redeclarable< T > *D, RedeclarableResult &Redecl, DeclID TemplatePatternID=0)
Attempts to merge the given declaration (D) with another declaration of the same entity.
static OMPThreadPrivateDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned N)
Definition: DeclOpenMP.cpp:41
void setManglingNumber(const NamedDecl *ND, unsigned Number)
void setUninstantiatedDefaultArg(Expr *arg)
Definition: Decl.cpp:2610
static IndirectFieldDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4520
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:1187
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:2862
LambdaCaptureKind
The different capture forms in a lambda introducer.
Definition: Lambda.h:34
Represents a member of a struct/union/class.
Definition: Decl.h:2588
const Type * getAsType() const
Retrieve the type stored in this nested name specifier.
Defines the ExceptionSpecificationType enumeration and various utility functions. ...
void setLocStart(SourceLocation L)
Definition: Decl.h:496
static CXXRecordDecl * CreateDeserialized(const ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:157
void setVisibleDespiteOwningModule()
Set that this declaration is globally visible, even if it came from a module that is not visible...
Definition: DeclBase.h:773
ArgPassingKind
Enum that represents the different ways arguments are passed to and returned from function calls...
Definition: Decl.h:3611
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:2127
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:623
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:324
void Profile(llvm::FoldingSetNodeID &ID)
Definition: DeclTemplate.h:591
Defines the clang::attr::Kind enum.
clang::CharUnits operator*(clang::CharUnits::QuantityType Scale, const clang::CharUnits &CU)
Definition: CharUnits.h:208
Represents an access specifier followed by colon &#39;:&#39;.
Definition: DeclCXX.h:132
void setReturnType(QualType T)
Definition: DeclObjC.h:324
Declaration of a function specialization at template class scope.
static StaticAssertDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2838
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:2587
void setDeclImplementation(ImplementationControl ic)
Definition: DeclObjC.h:470
Describes a module or submodule.
Definition: Module.h:65
void setDefaultArgument(Expr *DefArg)
Set the default argument for this template parameter, and whether that default argument was inherited...
A IndirectFieldDecl record.
Definition: ASTBitCodes.h:1503
size_t size() const
The length of this record.
Definition: ASTReader.h:2391
static OMPCapturedExprDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclOpenMP.cpp:139
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:9097
Provides information about a function template specialization, which is a FunctionDecl that has been ...
Definition: DeclTemplate.h:508
Represents a C++ using-declaration.
Definition: DeclCXX.h:3349
void setUsingLoc(SourceLocation L)
Set the source location of the &#39;using&#39; keyword.
Definition: DeclCXX.h:3385
void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D)
IdentifierInfo * getAsIdentifier() const
Retrieve the identifier stored in this nested name specifier.
SelectorLocationsKind
Whether all locations of the selector identifiers are in a "standard" position.
static llvm::iterator_range< MergedRedeclIterator< DeclT > > merged_redecls(DeclT *D)
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:961
void setAccessControl(AccessControl ac)
Definition: DeclObjC.h:1974
static void attachLatestDecl(Decl *D, Decl *latest)
TypeSourceInfo * GetTypeSourceInfo(ModuleFile &F, const RecordData &Record, unsigned &Idx)
Reads a declarator info from the given record.
Definition: ASTReader.cpp:6761
< Capturing the *this object by copy
Definition: Lambda.h:37
RedeclarableResult VisitVarDeclImpl(VarDecl *D)
DeclLink RedeclLink
Points to the next redeclaration in the chain.
Definition: Redeclarable.h:186
An AccessSpecDecl record.
Definition: ASTBitCodes.h:1452
void setAtLoc(SourceLocation L)
Definition: DeclObjC.h:814
A convenient class for passing around template argument information.
Definition: TemplateBase.h:552
void setParamDestroyedInCallee(bool V)
Definition: Decl.h:3744
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
A ConstructorUsingShadowDecl record.
Definition: ASTBitCodes.h:1413
A UsingDirecitveDecl record.
Definition: ASTBitCodes.h:1416
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:2820
void VisitCXXRecordDecl(CXXRecordDecl *D)
static ClassTemplateSpecializationDecl * CreateDeserialized(ASTContext &C, unsigned ID)
void setSuperClass(ObjCInterfaceDecl *superCls)
Definition: DeclObjC.h:2685
A DecompositionDecl record.
Definition: ASTBitCodes.h:1361
Represents a declaration of a type.
Definition: Decl.h:2883
void setHasObjectMember(bool val)
Definition: Decl.h:3684
void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D)
void VisitMSPropertyDecl(MSPropertyDecl *FD)
static ObjCCategoryImplDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:2057
void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D)
ASTContext & getContext()
Retrieve the AST context that this AST reader supplements.
Definition: ASTReader.h:2307
void setHasImplicitReturnZero(bool IRZ)
State that falling off this function implicitly returns null/zero.
Definition: Decl.h:2060
MemberSpecializationInfo * getMemberSpecializationInfo() const
If this enumeration is an instantiation of a member enumeration of a class template specialization...
Definition: Decl.h:3583
DeclID VisitTemplateDecl(TemplateDecl *D)
SourceRange readSourceRange()
Read a source range, advancing Idx.
Definition: ASTReader.h:2603
void setClassInterface(ObjCInterfaceDecl *D)
Definition: DeclObjC.h:2741
CXXRecordDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:728
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1158
static FileScopeAsmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4622
void VisitCXXMethodDecl(CXXMethodDecl *D)
void setTrivial(bool IT)
Definition: Decl.h:2028
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:4592
A ClassTemplateSpecializationDecl record.
Definition: ASTBitCodes.h:1464
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2056
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:821
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:4053
Represents an ObjC class declaration.
Definition: DeclObjC.h:1164
Represents a linkage specification.
Definition: DeclCXX.h:2823
static ParmVarDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:2552
void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D)
CXXRecordDecl * getTemplatedDecl() const
Get the underlying class declarations of the template.
A binding in a decomposition declaration.
Definition: DeclCXX.h:3792
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:3353
void setInitVal(const llvm::APSInt &V)
Definition: Decl.h:2819
Ordinary names.
Definition: DeclBase.h:145
void setInitExpr(Expr *E)
Definition: Decl.h:2818
void setCachedLinkage(Linkage L) const
Definition: DeclBase.h:396
void setLocStart(SourceLocation L)
Definition: Decl.h:2911
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:870
void setHasInheritedPrototype(bool P=true)
State that this function inherited its prototype from a previous declaration.
Definition: Decl.h:2090
static std::string ReadString(const RecordData &Record, unsigned &Idx)
Definition: ASTReader.cpp:9083
void setGetterCXXConstructor(Expr *getterCXXConstructor)
Definition: DeclObjC.h:2845
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1587
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:1863
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2751
IdentifierInfo * GetIdentifierInfo(ModuleFile &M, const RecordData &Record, unsigned &Idx)
Definition: ASTReader.h:2047
llvm::FoldingSetVector< FunctionTemplateSpecializationInfo > Specializations
The function template specializations for this function template, including explicit specializations ...
Definition: DeclTemplate.h:977
void setVariadic(bool isVar)
Definition: DeclObjC.h:420
static TemplateTypeParmDecl * CreateDeserialized(const ASTContext &C, unsigned ID)
bool hasAttr() const
Definition: DeclBase.h:531
Represents the declaration of a typedef-name via a C++11 alias-declaration.
Definition: Decl.h:3047
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1613
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3686
RedeclarableResult VisitRedeclarable(Redeclarable< T > *D)
void setHasDestructors(bool val)
Definition: DeclObjC.h:2652
void VisitObjCContainerDecl(ObjCContainerDecl *D)
void setImplicitlyInline(bool I=true)
Flag that this function is implicitly inline.
Definition: Decl.h:2360
static ObjCCompatibleAliasDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:2208
void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D)
CXXDestructorDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:2743
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:688
A CXXDeductionGuideDecl record.
Definition: ASTBitCodes.h:1434
void VisitParmVarDecl(ParmVarDecl *PD)
void setStorageClass(StorageClass SClass)
Sets the storage class as written in the source.
Definition: Decl.h:2345
void VisitLinkageSpecDecl(LinkageSpecDecl *D)
static OMPRequiresDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned N)
Create deserialized requires node.
Definition: DeclOpenMP.cpp:73
void setIvarRBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2689
A StaticAssertDecl record.
Definition: ASTBitCodes.h:1494
for(unsigned I=0, E=TL.getNumArgs();I !=E;++I)
A VarTemplateSpecializationDecl record.
Definition: ASTBitCodes.h:1473
void VisitUsingPackDecl(UsingPackDecl *D)
void VisitUsingShadowDecl(UsingShadowDecl *D)
void VisitVarTemplatePartialSpecializationDecl(VarTemplatePartialSpecializationDecl *D)
TODO: Unify with ClassTemplatePartialSpecializationDecl version? May require unifying ClassTemplate(P...
void setNextIvar(ObjCIvarDecl *ivar)
Definition: DeclObjC.h:1972
void setSynthesize(bool synth)
Definition: DeclObjC.h:1982
This represents &#39;#pragma omp requires...&#39; directive.
Definition: DeclOpenMP.h:250
void VisitFriendDecl(FriendDecl *D)
unsigned Offset
Definition: Format.cpp:1631
An ObjCTypeParamDecl record.
Definition: ASTBitCodes.h:1530
void VisitDecl(Decl *D)
A record containing CXXBaseSpecifiers.
Definition: ASTBitCodes.h:1497
DiagnosticBuilder Diag(unsigned DiagID) const
Report a diagnostic.
Definition: ASTReader.cpp:9116
void setTrivialForCall(bool IT)
Definition: Decl.h:2031
void setType(QualType T, TypeSourceInfo *TSI)
Definition: DeclObjC.h:823
TemplateParameterList * getTemplateParameters() const
Get the list of template parameters.
Definition: DeclTemplate.h:432
bool isCanonicalDecl() const
Whether this particular Decl is a canonical one.
Definition: DeclBase.h:876
void setGetterMethodDecl(ObjCMethodDecl *gDecl)
Definition: DeclObjC.h:915
Represents a shadow constructor declaration introduced into a class by a C++11 using-declaration that...
Definition: DeclCXX.h:3237
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3867
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:106
A ObjCCategoryImplDecl record.
Definition: ASTBitCodes.h:1331
Defines the clang::LangOptions interface.
void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD)
void setBitWidth(Expr *Width)
Set the bit-field width for this member.
Definition: Decl.h:2690
static LinkageSpecDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2532
A ObjCPropertyImplDecl record.
Definition: ASTBitCodes.h:1343
StateNode * Previous
Declaration of a template type parameter.
void setSetterMethodDecl(ObjCMethodDecl *gDecl)
Definition: DeclObjC.h:918
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:6779
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2703
const internal::VariadicAllOfMatcher< Decl > decl
Matches declarations.
void setInit(Expr *I)
Definition: Decl.cpp:2205
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:132
A CXXConstructorDecl record.
Definition: ASTBitCodes.h:1440
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:722
void setContextParam(unsigned i, ImplicitParamDecl *P)
Definition: Decl.h:4122
void setAtEndRange(SourceRange atEnd)
Definition: DeclObjC.h:1116
void setRBraceLoc(SourceLocation L)
Definition: DeclCXX.h:2874
static DeclLink PreviousDeclLink(decl_type *D)
Definition: Redeclarable.h:167
void setRelatedResultType(bool RRT=true)
Note whether this method has a related result type.
Definition: DeclObjC.h:262
DeclContext * getDeclContext()
Definition: DeclBase.h:427
SourceRange ReadSourceRange(ModuleFile &F, const RecordData &Record, unsigned &Idx)
Read a source range.
Definition: ASTReader.cpp:9053
A record containing CXXCtorInitializers.
Definition: ASTBitCodes.h:1500
A VarTemplateDecl record.
Definition: ASTBitCodes.h:1470
IdentifierResolver - Keeps track of shadowed decls on enclosing scopes.
static ObjCTypeParamList * create(ASTContext &ctx, SourceLocation lAngleLoc, ArrayRef< ObjCTypeParamDecl *> typeParams, SourceLocation rAngleLoc)
Create a new Objective-C type parameter list.
Definition: DeclObjC.cpp:1434
void setMemberSpecialization()
Note that this member template is a specialization.
Definition: DeclTemplate.h:884
Decl * readDecl()
Reads a declaration from the given position in a record in the given module, advancing Idx...
Definition: ASTReader.h:2510
NonTypeTemplateParmDecl - Declares a non-type template parameter, e.g., "Size" in.
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:2422
void setDefined(bool isDefined)
Definition: DeclObjC.h:433
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:201
void setCompleteDefinitionRequired(bool V=true)
True if this complete decl is required to be complete for some existing use.
Definition: Decl.h:3193
RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D)
Information about a module that has been loaded by the ASTReader.
Definition: Module.h:108
A namespace alias, stored as a NamespaceAliasDecl*.
void setLateTemplateParsed(bool ILT=true)
State that this templated function will be late parsed.
Definition: Decl.h:2019
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:2186
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:1446
void VisitOMPRequiresDecl(OMPRequiresDecl *D)
SmallVector< uint64_t, 1 > ObjCCategories
The Objective-C category lists for categories known to this module.
Definition: Module.h:443
A NonTypeTemplateParmDecl record that stores an expanded non-type template parameter pack...
Definition: ASTBitCodes.h:1507
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
static NamespaceAliasDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2649
static CXXConstructorDecl * CreateDeserialized(ASTContext &C, unsigned ID, bool InheritsConstructor)
Definition: DeclCXX.cpp:2309
bool isFunctionOrMethod() const
Definition: DeclBase.h:1800
StorageClass
Storage classes.
Definition: Specifiers.h:206
void mergeClassExtensionProtocolList(ObjCProtocolDecl *const *List, unsigned Num, ASTContext &C)
mergeClassExtensionProtocolList - Merge class extension&#39;s protocol list into the protocol list for th...
Definition: DeclObjC.cpp:433
static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody)
Determine whether the consumer will be interested in seeing this declaration (via HandleTopLevelDecl)...
PragmaMSCommentKind
Definition: PragmaKinds.h:15
This declaration has an owning module, and is visible when that module is imported.
A NamespaceAliasDecl record.
Definition: ASTBitCodes.h:1401
void setTypename(bool TN)
Sets whether the using declaration has &#39;typename&#39;.
Definition: DeclCXX.h:3407
Declaration of an alias template.
void setModedTypeSourceInfo(TypeSourceInfo *unmodedTSI, QualType modedTy)
Definition: Decl.h:2991
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:419
TemplateTemplateParmDecl - Declares a template template parameter, e.g., "T" in.
void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D)
An ImplicitParamDecl record.
Definition: ASTBitCodes.h:1355
void setIvarRBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2410
void VisitDecompositionDecl(DecompositionDecl *DD)
void setIsRedeclaration(bool RD)
Definition: DeclObjC.h:268
Represents a C++ deduction guide declaration.
Definition: DeclCXX.h:1988
Represents a C++ conversion function within a class.
Definition: DeclCXX.h:2765
static UsingDirectiveDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2553
An EnumConstantDecl record.
Definition: ASTBitCodes.h:1307
static ObjCTypeParamDecl * CreateDeserialized(ASTContext &ctx, unsigned ID)
Definition: DeclObjC.cpp:1401
std::string readString()
Read a string, advancing Idx.
Definition: ASTReader.h:2623
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:707
void VisitNamespaceAliasDecl(NamespaceAliasDecl *D)
void setHasSkippedBody(bool Skipped=true)
Definition: DeclObjC.h:458
An ImportDecl recording a module import.
Definition: ASTBitCodes.h:1518
A ObjCCategoryDecl record.
Definition: ASTBitCodes.h:1328
void setDoesNotEscape(bool B=true)
Definition: Decl.h:4019
void setDeclContext(DeclContext *DC)
setDeclContext - Set both the semantic and lexical DeclContext to DC.
Definition: DeclBase.cpp:295
static ObjCMethodDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:822
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:216
void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D)
void VisitObjCProtocolDecl(ObjCProtocolDecl *D)
A ObjCCompatibleAliasDecl record.
Definition: ASTBitCodes.h:1337
void setHasExternalVisibleStorage(bool ES=true) const
State whether this DeclContext has external storage for declarations visible in this context...
Definition: DeclBase.h:2330
Attr * ReadAttr(ModuleFile &M, const RecordData &Record, unsigned &Idx)
Reads one attribute from the current stream position.
bool hasAttrs() const
Definition: DeclBase.h:473
void VisitPragmaCommentDecl(PragmaCommentDecl *D)
void mergeDefinitionVisibility(NamedDecl *Def, NamedDecl *MergedDef)
Note that MergedDef is a redefinition of the canonical definition Def, so Def should be visible whene...
Definition: ASTReader.cpp:3781
static TypeAliasTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty alias template node.
unsigned readRecord(llvm::BitstreamCursor &Cursor, unsigned AbbrevID)
Reads a record with id AbbrevID from Cursor, resetting the internal state.
void setIsVariadic(bool value)
Definition: Decl.h:3943
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:4367
uint32_t SubmoduleID
An ID number that refers to a submodule in a module file.
Definition: ASTBitCodes.h:172
Represents a C++ Modules TS module export declaration.
Definition: Decl.h:4223
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:4014
void setColonLoc(SourceLocation CLoc)
Sets the location of the colon.
Definition: DeclCXX.h:157
An UnresolvedUsingValueDecl record.
Definition: ASTBitCodes.h:1419
The "struct" keyword.
Definition: Type.h:5019
void VisitDeclaratorDecl(DeclaratorDecl *DD)
static ObjCProtocolDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclObjC.cpp:1867
static EnumConstantDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4494
Kind
static UsingShadowDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2673
decl_type * getPreviousDecl()
Return the previous declaration of this declaration or NULL if this is the first declaration.
Definition: Redeclarable.h:204
static void markIncompleteDeclChainImpl(Redeclarable< DeclT > *D)
static CXXDestructorDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2453
Encodes a location in the source.
static EmptyDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: Decl.cpp:4634
QualType getReturnType() const
Definition: Type.h:3617
void setTopLevelDeclInObjCContainer(bool V=true)
Definition: DeclBase.h:586
static TemplateTemplateParmDecl * CreateDeserialized(ASTContext &C, unsigned ID)
void setModuleOwnershipKind(ModuleOwnershipKind MOK)
Set whether this declaration is hidden from name lookup.
Definition: DeclBase.h:784
This represents &#39;#pragma omp declare reduction ...&#39; directive.
Definition: DeclOpenMP.h:103
A record that stores the set of declarations that are visible from a given DeclContext.
Definition: ASTBitCodes.h:1392
Pseudo declaration for capturing expressions.
Definition: DeclOpenMP.h:217
void setIvarLBraceLoc(SourceLocation Loc)
Definition: DeclObjC.h:2408
void setBraceRange(SourceRange R)
Definition: Decl.h:3155
void setAtStartLoc(SourceLocation Loc)
Definition: DeclObjC.h:1109
void VisitEmptyDecl(EmptyDecl *D)
void setAnonymousNamespace(NamespaceDecl *D)
Definition: Decl.h:601
void setFreeStanding(bool isFreeStanding=true)
True if this tag is free standing, e.g. "struct foo;".
Definition: Decl.h:3216
void setObjCDeclQualifier(ObjCDeclQualifier QV)
Definition: DeclObjC.h:251
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3073
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:376
static DecompositionDecl * CreateDeserialized(ASTContext &C, unsigned ID, unsigned NumBindings)
Definition: DeclCXX.cpp:2881
Defines several types used to describe C++ lambda expressions that are shared between the parser and ...
void setReferenced(bool R=true)
Definition: DeclBase.h:577
Represents the declaration of a label.
Definition: Decl.h:468
void mergeTemplatePattern(RedeclarableTemplateDecl *D, RedeclarableTemplateDecl *Existing, DeclID DsID, bool IsKeyDecl)
Merge together the pattern declarations from two template declarations.
void setPropertyAttributesAsWritten(PropertyAttributeKind PRVal)
Definition: DeclObjC.h:848
Represents a dependent using declaration which was not marked with typename.
Definition: DeclCXX.h:3568
void setPosition(unsigned P)
void setIsCopyDeductionCandidate(bool isCDC=true)
Definition: DeclCXX.h:2024
void VisitObjCImplDecl(ObjCImplDecl *D)
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2041
void setDefaulted(bool D=true)
Definition: Decl.h:2036
void setHasFlexibleArrayMember(bool V)
Definition: Decl.h:3660
EnumDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.h:3414
Represents a C++ nested name specifier, such as "\::std::vector<int>::".
void VisitBindingDecl(BindingDecl *BD)
A TemplateTypeParmDecl record.
Definition: ASTBitCodes.h:1482
This file defines OpenMP nodes for declarative directives.
bool isFirstDecl() const
True if this is the first declaration in its redeclaration chain.
Definition: Redeclarable.h:223
Data that is common to all of the declarations of a given function template.
Definition: DeclTemplate.h:974
const ArrayType * getAsArrayType(QualType T) const
Type Query functions.
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2272
QualType getInjectedClassNameSpecialization()
Retrieve the template specialization type of the injected-class-name for this class template...
void readDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name)
Definition: ASTReader.h:2537
void addDecl(NamedDecl *D)
Definition: UnresolvedSet.h:89
void setDeclName(DeclarationName N)
Set the name of this declaration.
Definition: Decl.h:300
static MSPropertyDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2917
SourceLocation getLocation() const
Definition: ASTBitCodes.h:236
void setOverriding(bool IsOver)
Definition: DeclObjC.h:443
static ConstructorUsingShadowDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Definition: DeclCXX.cpp:2696
Describes the categories of an Objective-C class.
Definition: ASTBitCodes.h:2036
bool isDeclIDFromModule(serialization::GlobalDeclID ID, ModuleFile &M) const
Returns true if global DeclID ID originated from module M.
Definition: ASTReader.cpp:7224
void init(NamedDecl *templatedDecl, TemplateParameterList *templateParams)
Initialize the underlying templated declaration and template parameters.
Definition: DeclTemplate.h:497
void setTagKind(TagKind TK)
Definition: Decl.h:3256
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:4450
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:721
void setProtocolList(ObjCProtocolDecl *const *List, unsigned Num, const SourceLocation *Locs, ASTContext &C)
setProtocolList - Set the list of protocols that this interface implements.
Definition: DeclObjC.h:2336
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:695
uint32_t TypeID
An ID number that refers to a type in an AST file.
Definition: ASTBitCodes.h:86
void setInitializer(Expr *E, InitKind IK)
Set initializer expression for the declare reduction construct.
Definition: DeclOpenMP.h:184
A simple visitor class that helps create declaration visitors.
Definition: DeclVisitor.h:67
const unsigned int DECL_UPDATES
Record of updates for a declaration that was modified after being deserialized.
Definition: ASTBitCodes.h:1281
void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D)
void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D)
void VisitRecordDecl(RecordDecl *RD)
static T assert_cast(T t)
"Cast" to type T, asserting if we don&#39;t have an implicit conversion.
serialization::SubmoduleID getGlobalSubmoduleID(unsigned LocalID)
Retrieve the global submodule ID its local ID number.
Definition: ASTReader.h:2411
static VarTemplateDecl * CreateDeserialized(ASTContext &C, unsigned ID)
Create an empty variable template node.
A NamespaceDecl record.
Definition: ASTBitCodes.h:1398
Represents a C++11 static_assert declaration.
Definition: DeclCXX.h:3743
__DEVICE__ void * memcpy(void *__a, const void *__b, size_t __c)
uint32_t BitOffset
Offset in the AST file.
Definition: ASTBitCodes.h:226
void setExplicitlyDefaulted(bool ED=true)
State that this function is explicitly defaulted per C++0x.
Definition: Decl.h:2046
void setLAngleLoc(SourceLocation Loc)
Definition: TemplateBase.h:571
void VisitExportDecl(ExportDecl *D)
void addArgument(const TemplateArgumentLoc &Loc)
Definition: TemplateBase.h:592
File is a PCH file treated as the actual main file.
Definition: Module.h:57
ExceptionSpecificationType getExceptionSpecType() const
Get the kind of exception specification on this function.
Definition: Type.h:3913
Describes a module import declaration, which makes the contents of the named module visible in the cu...
Definition: Decl.h:4158
serialization::DeclID readDeclID()
Reads a declaration ID from the given position in this record.
Definition: ASTReader.h:2504
void VisitValueDecl(ValueDecl *VD)
void setVirtualAsWritten(bool V)
State that this function is marked as virtual explicitly.
Definition: Decl.h:2006
A ObjCProtocolDecl record.
Definition: ASTBitCodes.h:1319
void setDeclaredWithTypename(bool withTypename)
Set whether this template type parameter was declared with the &#39;typename&#39; or &#39;class&#39; keyword...
void setHasWrittenPrototype(bool P=true)
State that this function has a written prototype.
Definition: Decl.h:2078
bool hasPendingBody() const
Determine whether this declaration has a pending body.
Defines various enumerations that describe declaration and type specifiers.
DeclarationNameLoc - Additional source/type location info for a declaration name. ...
void setSetterCXXAssignment(Expr *setterCXXAssignment)
Definition: