1 //===--- ASTReaderDecl.cpp - Decl Deserialization ---------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the ASTReader::ReadDeclRecord method, which is the
11 // entrypoint for loading a decl.
13 //===----------------------------------------------------------------------===//
15 #include "clang/Serialization/ASTReader.h"
16 #include "ASTCommon.h"
17 #include "ASTReaderInternals.h"
18 #include "clang/AST/ASTConsumer.h"
19 #include "clang/AST/ASTContext.h"
20 #include "clang/AST/DeclCXX.h"
21 #include "clang/AST/DeclGroup.h"
22 #include "clang/AST/DeclTemplate.h"
23 #include "clang/AST/DeclVisitor.h"
24 #include "clang/AST/Expr.h"
25 #include "clang/Sema/IdentifierResolver.h"
26 #include "clang/Sema/Sema.h"
27 #include "clang/Sema/SemaDiagnostic.h"
28 #include "llvm/Support/SaveAndRestore.h"
30 using namespace clang;
31 using namespace clang::serialization;
33 //===----------------------------------------------------------------------===//
34 // Declaration deserialization
35 //===----------------------------------------------------------------------===//
38 class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
41 const DeclID ThisDeclID;
42 const unsigned RawLocation;
43 typedef ASTReader::RecordData RecordData;
44 const RecordData &Record;
46 TypeID TypeIDForTypeDecl;
47 unsigned AnonymousDeclNumber;
48 GlobalDeclID NamedDeclForTagDecl;
49 IdentifierInfo *TypedefNameForLinkage;
53 uint64_t GetCurrentCursorOffset();
55 SourceLocation ReadSourceLocation(const RecordData &R, unsigned &I) {
56 return Reader.ReadSourceLocation(F, R, I);
59 SourceRange ReadSourceRange(const RecordData &R, unsigned &I) {
60 return Reader.ReadSourceRange(F, R, I);
63 TypeSourceInfo *GetTypeSourceInfo(const RecordData &R, unsigned &I) {
64 return Reader.GetTypeSourceInfo(F, R, I);
67 serialization::DeclID ReadDeclID(const RecordData &R, unsigned &I) {
68 return Reader.ReadDeclID(F, R, I);
71 void ReadDeclIDList(SmallVectorImpl<DeclID> &IDs) {
72 for (unsigned I = 0, Size = Record[Idx++]; I != Size; ++I)
73 IDs.push_back(ReadDeclID(Record, Idx));
76 Decl *ReadDecl(const RecordData &R, unsigned &I) {
77 return Reader.ReadDecl(F, R, I);
81 T *ReadDeclAs(const RecordData &R, unsigned &I) {
82 return Reader.ReadDeclAs<T>(F, R, I);
85 void ReadQualifierInfo(QualifierInfo &Info,
86 const RecordData &R, unsigned &I) {
87 Reader.ReadQualifierInfo(F, Info, R, I);
90 void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name,
91 const RecordData &R, unsigned &I) {
92 Reader.ReadDeclarationNameLoc(F, DNLoc, Name, R, I);
95 void ReadDeclarationNameInfo(DeclarationNameInfo &NameInfo,
96 const RecordData &R, unsigned &I) {
97 Reader.ReadDeclarationNameInfo(F, NameInfo, R, I);
100 serialization::SubmoduleID readSubmoduleID(const RecordData &R,
105 return Reader.getGlobalSubmoduleID(F, R[I++]);
108 Module *readModule(const RecordData &R, unsigned &I) {
109 return Reader.getSubmodule(readSubmoduleID(R, I));
112 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
113 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
114 const RecordData &R, unsigned &I);
115 void MergeDefinitionData(CXXRecordDecl *D,
116 struct CXXRecordDecl::DefinitionData &&NewDD);
118 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
121 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
122 unsigned Index, NamedDecl *D);
124 /// Results from loading a RedeclarableDecl.
125 class RedeclarableResult {
126 GlobalDeclID FirstID;
131 RedeclarableResult(GlobalDeclID FirstID, Decl *MergeWith, bool IsKeyDecl)
132 : FirstID(FirstID), MergeWith(MergeWith), IsKeyDecl(IsKeyDecl) {}
134 /// \brief Retrieve the first ID.
135 GlobalDeclID getFirstID() const { return FirstID; }
137 /// \brief Is this declaration a key declaration?
138 bool isKeyDecl() const { return IsKeyDecl; }
140 /// \brief Get a known declaration that this should be merged with, if
142 Decl *getKnownMergeTarget() const { return MergeWith; }
145 /// \brief Class used to capture the result of searching for an existing
146 /// declaration of a specific kind and name, along with the ability
147 /// to update the place where this result was found (the declaration
148 /// chain hanging off an identifier or the DeclContext we searched in)
150 class FindExistingResult {
154 mutable bool AddResult;
156 unsigned AnonymousDeclNumber;
157 IdentifierInfo *TypedefNameForLinkage;
159 void operator=(FindExistingResult&) = delete;
162 FindExistingResult(ASTReader &Reader)
163 : Reader(Reader), New(nullptr), Existing(nullptr), AddResult(false),
164 AnonymousDeclNumber(0), TypedefNameForLinkage(nullptr) {}
166 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
167 unsigned AnonymousDeclNumber,
168 IdentifierInfo *TypedefNameForLinkage)
169 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
170 AnonymousDeclNumber(AnonymousDeclNumber),
171 TypedefNameForLinkage(TypedefNameForLinkage) {}
173 FindExistingResult(const FindExistingResult &Other)
174 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
175 AddResult(Other.AddResult),
176 AnonymousDeclNumber(Other.AnonymousDeclNumber),
177 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
178 Other.AddResult = false;
181 ~FindExistingResult();
183 /// \brief Suppress the addition of this result into the known set of
185 void suppress() { AddResult = false; }
187 operator NamedDecl*() const { return Existing; }
190 operator T*() const { return dyn_cast_or_null<T>(Existing); }
193 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
195 FindExistingResult findExisting(NamedDecl *D);
198 ASTDeclReader(ASTReader &Reader, ModuleFile &F, DeclID thisDeclID,
199 unsigned RawLocation, const RecordData &Record, unsigned &Idx)
200 : Reader(Reader), F(F), ThisDeclID(thisDeclID),
201 RawLocation(RawLocation), Record(Record), Idx(Idx),
202 TypeIDForTypeDecl(0), NamedDeclForTagDecl(0),
203 TypedefNameForLinkage(nullptr), HasPendingBody(false) {}
205 template <typename DeclT>
206 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
207 static Decl *getMostRecentDeclImpl(...);
208 static Decl *getMostRecentDecl(Decl *D);
210 template <typename DeclT>
211 static void attachPreviousDeclImpl(ASTReader &Reader,
212 Redeclarable<DeclT> *D, Decl *Previous,
214 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
215 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
218 template <typename DeclT>
219 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
220 static void attachLatestDeclImpl(...);
221 static void attachLatestDecl(Decl *D, Decl *latest);
223 template <typename DeclT>
224 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
225 static void markIncompleteDeclChainImpl(...);
227 /// \brief Determine whether this declaration has a pending body.
228 bool hasPendingBody() const { return HasPendingBody; }
232 void UpdateDecl(Decl *D, ModuleFile &ModuleFile,
233 const RecordData &Record);
235 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
236 ObjCCategoryDecl *Next) {
237 Cat->NextClassCategory = Next;
240 void VisitDecl(Decl *D);
241 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
242 void VisitNamedDecl(NamedDecl *ND);
243 void VisitLabelDecl(LabelDecl *LD);
244 void VisitNamespaceDecl(NamespaceDecl *D);
245 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
246 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
247 void VisitTypeDecl(TypeDecl *TD);
248 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
249 void VisitTypedefDecl(TypedefDecl *TD);
250 void VisitTypeAliasDecl(TypeAliasDecl *TD);
251 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
252 RedeclarableResult VisitTagDecl(TagDecl *TD);
253 void VisitEnumDecl(EnumDecl *ED);
254 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
255 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
256 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
257 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
258 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
259 ClassTemplateSpecializationDecl *D);
260 void VisitClassTemplateSpecializationDecl(
261 ClassTemplateSpecializationDecl *D) {
262 VisitClassTemplateSpecializationDeclImpl(D);
264 void VisitClassTemplatePartialSpecializationDecl(
265 ClassTemplatePartialSpecializationDecl *D);
266 void VisitClassScopeFunctionSpecializationDecl(
267 ClassScopeFunctionSpecializationDecl *D);
269 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
270 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
271 VisitVarTemplateSpecializationDeclImpl(D);
273 void VisitVarTemplatePartialSpecializationDecl(
274 VarTemplatePartialSpecializationDecl *D);
275 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
276 void VisitValueDecl(ValueDecl *VD);
277 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
278 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
279 void VisitDeclaratorDecl(DeclaratorDecl *DD);
280 void VisitFunctionDecl(FunctionDecl *FD);
281 void VisitCXXMethodDecl(CXXMethodDecl *D);
282 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
283 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
284 void VisitCXXConversionDecl(CXXConversionDecl *D);
285 void VisitFieldDecl(FieldDecl *FD);
286 void VisitMSPropertyDecl(MSPropertyDecl *FD);
287 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
288 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
289 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
290 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
291 void VisitParmVarDecl(ParmVarDecl *PD);
292 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
293 DeclID VisitTemplateDecl(TemplateDecl *D);
294 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
295 void VisitClassTemplateDecl(ClassTemplateDecl *D);
296 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
297 void VisitVarTemplateDecl(VarTemplateDecl *D);
298 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
299 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
300 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
301 void VisitUsingDecl(UsingDecl *D);
302 void VisitUsingShadowDecl(UsingShadowDecl *D);
303 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
304 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
305 void VisitImportDecl(ImportDecl *D);
306 void VisitAccessSpecDecl(AccessSpecDecl *D);
307 void VisitFriendDecl(FriendDecl *D);
308 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
309 void VisitStaticAssertDecl(StaticAssertDecl *D);
310 void VisitBlockDecl(BlockDecl *BD);
311 void VisitCapturedDecl(CapturedDecl *CD);
312 void VisitEmptyDecl(EmptyDecl *D);
314 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
317 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
320 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
321 DeclID TemplatePatternID = 0);
324 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
325 RedeclarableResult &Redecl,
326 DeclID TemplatePatternID = 0);
329 void mergeMergeable(Mergeable<T> *D);
331 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
332 RedeclarableTemplateDecl *Existing,
333 DeclID DsID, bool IsKeyDecl);
335 ObjCTypeParamList *ReadObjCTypeParamList();
337 // FIXME: Reorder according to DeclNodes.td?
338 void VisitObjCMethodDecl(ObjCMethodDecl *D);
339 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
340 void VisitObjCContainerDecl(ObjCContainerDecl *D);
341 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
342 void VisitObjCIvarDecl(ObjCIvarDecl *D);
343 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
344 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
345 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
346 void VisitObjCImplDecl(ObjCImplDecl *D);
347 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
348 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
349 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
350 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
351 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
352 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
354 /// We've merged the definition \p MergedDef into the existing definition
355 /// \p Def. Ensure that \p Def is made visible whenever \p MergedDef is made
357 void mergeDefinitionVisibility(NamedDecl *Def, NamedDecl *MergedDef) {
358 if (Def->isHidden()) {
359 // If MergedDef is visible or becomes visible, make the definition visible.
360 if (!MergedDef->isHidden())
362 else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
363 Reader.getContext().mergeDefinitionIntoModule(
364 Def, MergedDef->getImportedOwningModule(),
365 /*NotifyListeners*/ false);
366 Reader.PendingMergedDefinitionsToDeduplicate.insert(Def);
368 auto SubmoduleID = MergedDef->getOwningModuleID();
369 assert(SubmoduleID && "hidden definition in no module");
370 Reader.HiddenNamesMap[Reader.getSubmodule(SubmoduleID)].push_back(Def);
375 } // end namespace clang
378 /// Iterator over the redeclarations of a declaration that have already
379 /// been merged into the same redeclaration chain.
380 template<typename DeclT>
381 class MergedRedeclIterator {
382 DeclT *Start, *Canonical, *Current;
384 MergedRedeclIterator() : Current(nullptr) {}
385 MergedRedeclIterator(DeclT *Start)
386 : Start(Start), Canonical(nullptr), Current(Start) {}
388 DeclT *operator*() { return Current; }
390 MergedRedeclIterator &operator++() {
391 if (Current->isFirstDecl()) {
393 Current = Current->getMostRecentDecl();
395 Current = Current->getPreviousDecl();
397 // If we started in the merged portion, we'll reach our start position
398 // eventually. Otherwise, we'll never reach it, but the second declaration
399 // we reached was the canonical declaration, so stop when we see that one
401 if (Current == Start || Current == Canonical)
406 friend bool operator!=(const MergedRedeclIterator &A,
407 const MergedRedeclIterator &B) {
408 return A.Current != B.Current;
411 } // end anonymous namespace
413 template<typename DeclT>
414 llvm::iterator_range<MergedRedeclIterator<DeclT>> merged_redecls(DeclT *D) {
415 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
416 MergedRedeclIterator<DeclT>());
419 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
420 return F.DeclsCursor.GetCurrentBitNo() + F.GlobalBitOffset;
423 void ASTDeclReader::Visit(Decl *D) {
424 DeclVisitor<ASTDeclReader, void>::Visit(D);
426 if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) {
428 DeclaratorDecl::ExtInfo *Info =
429 DD->DeclInfo.get<DeclaratorDecl::ExtInfo *>();
431 GetTypeSourceInfo(Record, Idx);
434 DD->DeclInfo = GetTypeSourceInfo(Record, Idx);
438 if (TypeDecl *TD = dyn_cast<TypeDecl>(D)) {
439 // We have a fully initialized TypeDecl. Read its type now.
440 TD->setTypeForDecl(Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull());
442 // If this is a tag declaration with a typedef name for linkage, it's safe
443 // to load that typedef now.
444 if (NamedDeclForTagDecl)
445 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
446 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
447 } else if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
448 // if we have a fully initialized TypeDecl, we can safely read its type now.
449 ID->TypeForDecl = Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull();
450 } else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
451 // FunctionDecl's body was written last after all other Stmts/Exprs.
452 // We only read it if FD doesn't already have a body (e.g., from another
454 // FIXME: Can we diagnose ODR violations somehow?
456 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
457 CD->NumCtorInitializers = Record[Idx++];
458 if (CD->NumCtorInitializers)
459 CD->CtorInitializers =
460 Reader.ReadCXXCtorInitializersRef(F, Record, Idx);
462 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
463 HasPendingBody = true;
468 void ASTDeclReader::VisitDecl(Decl *D) {
469 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
470 isa<ParmVarDecl>(D)) {
471 // We don't want to deserialize the DeclContext of a template
472 // parameter or of a parameter of a function template immediately. These
473 // entities might be used in the formulation of its DeclContext (for
474 // example, a function parameter can be used in decltype() in trailing
475 // return type of the function). Use the translation unit DeclContext as a
477 GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID(Record, Idx);
478 GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID(Record, Idx);
479 if (!LexicalDCIDForTemplateParmDecl)
480 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
481 Reader.addPendingDeclContextInfo(D,
482 SemaDCIDForTemplateParmDecl,
483 LexicalDCIDForTemplateParmDecl);
484 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
486 DeclContext *SemaDC = ReadDeclAs<DeclContext>(Record, Idx);
487 DeclContext *LexicalDC = ReadDeclAs<DeclContext>(Record, Idx);
490 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
491 // Avoid calling setLexicalDeclContext() directly because it uses
492 // Decl::getASTContext() internally which is unsafe during derialization.
493 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
494 Reader.getContext());
496 D->setLocation(Reader.ReadSourceLocation(F, RawLocation));
497 D->setInvalidDecl(Record[Idx++]);
498 if (Record[Idx++]) { // hasAttrs
500 Reader.ReadAttributes(F, Attrs, Record, Idx);
501 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
502 // internally which is unsafe during derialization.
503 D->setAttrsImpl(Attrs, Reader.getContext());
505 D->setImplicit(Record[Idx++]);
506 D->Used = Record[Idx++];
507 D->setReferenced(Record[Idx++]);
508 D->setTopLevelDeclInObjCContainer(Record[Idx++]);
509 D->setAccess((AccessSpecifier)Record[Idx++]);
510 D->FromASTFile = true;
511 D->setModulePrivate(Record[Idx++]);
512 D->Hidden = D->isModulePrivate();
514 // Determine whether this declaration is part of a (sub)module. If so, it
515 // may not yet be visible.
516 if (unsigned SubmoduleID = readSubmoduleID(Record, Idx)) {
517 // Store the owning submodule ID in the declaration.
518 D->setOwningModuleID(SubmoduleID);
521 // Module-private declarations are never visible, so there is no work to do.
522 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
523 // If local visibility is being tracked, this declaration will become
524 // hidden and visible as the owning module does. Inform Sema that this
525 // declaration might not be visible.
527 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
528 if (Owner->NameVisibility != Module::AllVisible) {
529 // The owning module is not visible. Mark this declaration as hidden.
532 // Note that this declaration was hidden because its owning module is
534 Reader.HiddenNamesMap[Owner].push_back(D);
540 void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
541 llvm_unreachable("Translation units are not serialized");
544 void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
546 ND->setDeclName(Reader.ReadDeclarationName(F, Record, Idx));
547 AnonymousDeclNumber = Record[Idx++];
550 void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
552 TD->setLocStart(ReadSourceLocation(Record, Idx));
553 // Delay type reading until after we have fully initialized the decl.
554 TypeIDForTypeDecl = Reader.getGlobalTypeID(F, Record[Idx++]);
557 ASTDeclReader::RedeclarableResult
558 ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
559 RedeclarableResult Redecl = VisitRedeclarable(TD);
561 TypeSourceInfo *TInfo = GetTypeSourceInfo(Record, Idx);
562 if (Record[Idx++]) { // isModed
563 QualType modedT = Reader.readType(F, Record, Idx);
564 TD->setModedTypeSourceInfo(TInfo, modedT);
566 TD->setTypeSourceInfo(TInfo);
570 void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
571 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
572 mergeRedeclarable(TD, Redecl);
575 void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
576 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
577 if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>(Record, Idx))
578 // Merged when we merge the template.
579 TD->setDescribedAliasTemplate(Template);
581 mergeRedeclarable(TD, Redecl);
584 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
585 RedeclarableResult Redecl = VisitRedeclarable(TD);
588 TD->IdentifierNamespace = Record[Idx++];
589 TD->setTagKind((TagDecl::TagKind)Record[Idx++]);
590 if (!isa<CXXRecordDecl>(TD))
591 TD->setCompleteDefinition(Record[Idx++]);
592 TD->setEmbeddedInDeclarator(Record[Idx++]);
593 TD->setFreeStanding(Record[Idx++]);
594 TD->setCompleteDefinitionRequired(Record[Idx++]);
595 TD->setRBraceLoc(ReadSourceLocation(Record, Idx));
597 switch (Record[Idx++]) {
601 TagDecl::ExtInfo *Info = new (Reader.getContext()) TagDecl::ExtInfo();
602 ReadQualifierInfo(*Info, Record, Idx);
603 TD->TypedefNameDeclOrQualifier = Info;
606 case 2: // TypedefNameForAnonDecl
607 NamedDeclForTagDecl = ReadDeclID(Record, Idx);
608 TypedefNameForLinkage = Reader.GetIdentifierInfo(F, Record, Idx);
611 llvm_unreachable("unexpected tag info kind");
614 if (!isa<CXXRecordDecl>(TD))
615 mergeRedeclarable(TD, Redecl);
619 void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
621 if (TypeSourceInfo *TI = Reader.GetTypeSourceInfo(F, Record, Idx))
622 ED->setIntegerTypeSourceInfo(TI);
624 ED->setIntegerType(Reader.readType(F, Record, Idx));
625 ED->setPromotionType(Reader.readType(F, Record, Idx));
626 ED->setNumPositiveBits(Record[Idx++]);
627 ED->setNumNegativeBits(Record[Idx++]);
628 ED->IsScoped = Record[Idx++];
629 ED->IsScopedUsingClassTag = Record[Idx++];
630 ED->IsFixed = Record[Idx++];
632 // If this is a definition subject to the ODR, and we already have a
633 // definition, merge this one into it.
634 if (ED->IsCompleteDefinition &&
635 Reader.getContext().getLangOpts().Modules &&
636 Reader.getContext().getLangOpts().CPlusPlus) {
637 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
639 // This is the first time we've seen an imported definition. Look for a
640 // local definition before deciding that we are the first definition.
641 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
642 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
649 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
650 ED->IsCompleteDefinition = false;
651 mergeDefinitionVisibility(OldDef, ED);
657 if (EnumDecl *InstED = ReadDeclAs<EnumDecl>(Record, Idx)) {
658 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
659 SourceLocation POI = ReadSourceLocation(Record, Idx);
660 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
661 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
665 ASTDeclReader::RedeclarableResult
666 ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
667 RedeclarableResult Redecl = VisitTagDecl(RD);
668 RD->setHasFlexibleArrayMember(Record[Idx++]);
669 RD->setAnonymousStructOrUnion(Record[Idx++]);
670 RD->setHasObjectMember(Record[Idx++]);
671 RD->setHasVolatileMember(Record[Idx++]);
675 void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
677 VD->setType(Reader.readType(F, Record, Idx));
680 void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
683 ECD->setInitExpr(Reader.ReadExpr(F));
684 ECD->setInitVal(Reader.ReadAPSInt(Record, Idx));
688 void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
690 DD->setInnerLocStart(ReadSourceLocation(Record, Idx));
691 if (Record[Idx++]) { // hasExtInfo
692 DeclaratorDecl::ExtInfo *Info
693 = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
694 ReadQualifierInfo(*Info, Record, Idx);
699 void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
700 RedeclarableResult Redecl = VisitRedeclarable(FD);
701 VisitDeclaratorDecl(FD);
703 ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName(), Record, Idx);
704 FD->IdentifierNamespace = Record[Idx++];
706 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
707 // after everything else is read.
709 FD->SClass = (StorageClass)Record[Idx++];
710 FD->IsInline = Record[Idx++];
711 FD->IsInlineSpecified = Record[Idx++];
712 FD->IsVirtualAsWritten = Record[Idx++];
713 FD->IsPure = Record[Idx++];
714 FD->HasInheritedPrototype = Record[Idx++];
715 FD->HasWrittenPrototype = Record[Idx++];
716 FD->IsDeleted = Record[Idx++];
717 FD->IsTrivial = Record[Idx++];
718 FD->IsDefaulted = Record[Idx++];
719 FD->IsExplicitlyDefaulted = Record[Idx++];
720 FD->HasImplicitReturnZero = Record[Idx++];
721 FD->IsConstexpr = Record[Idx++];
722 FD->HasSkippedBody = Record[Idx++];
723 FD->IsLateTemplateParsed = Record[Idx++];
724 FD->setCachedLinkage(Linkage(Record[Idx++]));
725 FD->EndRangeLoc = ReadSourceLocation(Record, Idx);
727 switch ((FunctionDecl::TemplatedKind)Record[Idx++]) {
728 case FunctionDecl::TK_NonTemplate:
729 mergeRedeclarable(FD, Redecl);
731 case FunctionDecl::TK_FunctionTemplate:
732 // Merged when we merge the template.
733 FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>(Record,
736 case FunctionDecl::TK_MemberSpecialization: {
737 FunctionDecl *InstFD = ReadDeclAs<FunctionDecl>(Record, Idx);
738 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
739 SourceLocation POI = ReadSourceLocation(Record, Idx);
740 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
741 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
742 mergeRedeclarable(FD, Redecl);
745 case FunctionDecl::TK_FunctionTemplateSpecialization: {
746 FunctionTemplateDecl *Template = ReadDeclAs<FunctionTemplateDecl>(Record,
748 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
750 // Template arguments.
751 SmallVector<TemplateArgument, 8> TemplArgs;
752 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx,
753 /*Canonicalize*/ true);
755 // Template args as written.
756 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
757 SourceLocation LAngleLoc, RAngleLoc;
758 bool HasTemplateArgumentsAsWritten = Record[Idx++];
759 if (HasTemplateArgumentsAsWritten) {
760 unsigned NumTemplateArgLocs = Record[Idx++];
761 TemplArgLocs.reserve(NumTemplateArgLocs);
762 for (unsigned i=0; i != NumTemplateArgLocs; ++i)
763 TemplArgLocs.push_back(
764 Reader.ReadTemplateArgumentLoc(F, Record, Idx));
766 LAngleLoc = ReadSourceLocation(Record, Idx);
767 RAngleLoc = ReadSourceLocation(Record, Idx);
770 SourceLocation POI = ReadSourceLocation(Record, Idx);
772 ASTContext &C = Reader.getContext();
773 TemplateArgumentList *TemplArgList
774 = TemplateArgumentList::CreateCopy(C, TemplArgs.data(), TemplArgs.size());
775 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
776 for (unsigned i=0, e = TemplArgLocs.size(); i != e; ++i)
777 TemplArgsInfo.addArgument(TemplArgLocs[i]);
778 FunctionTemplateSpecializationInfo *FTInfo
779 = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
781 HasTemplateArgumentsAsWritten ? &TemplArgsInfo
784 FD->TemplateOrSpecialization = FTInfo;
786 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
787 // The template that contains the specializations set. It's not safe to
788 // use getCanonicalDecl on Template since it may still be initializing.
789 FunctionTemplateDecl *CanonTemplate
790 = ReadDeclAs<FunctionTemplateDecl>(Record, Idx);
791 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
792 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
793 // FunctionTemplateSpecializationInfo's Profile().
794 // We avoid getASTContext because a decl in the parent hierarchy may
796 llvm::FoldingSetNodeID ID;
797 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
798 void *InsertPos = nullptr;
799 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
800 FunctionTemplateSpecializationInfo *ExistingInfo =
801 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
803 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
805 assert(Reader.getContext().getLangOpts().Modules &&
806 "already deserialized this template specialization");
807 mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
812 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
814 UnresolvedSet<8> TemplDecls;
815 unsigned NumTemplates = Record[Idx++];
816 while (NumTemplates--)
817 TemplDecls.addDecl(ReadDeclAs<NamedDecl>(Record, Idx));
820 TemplateArgumentListInfo TemplArgs;
821 unsigned NumArgs = Record[Idx++];
823 TemplArgs.addArgument(Reader.ReadTemplateArgumentLoc(F, Record, Idx));
824 TemplArgs.setLAngleLoc(ReadSourceLocation(Record, Idx));
825 TemplArgs.setRAngleLoc(ReadSourceLocation(Record, Idx));
827 FD->setDependentTemplateSpecialization(Reader.getContext(),
828 TemplDecls, TemplArgs);
829 // These are not merged; we don't need to merge redeclarations of dependent
835 // Read in the parameters.
836 unsigned NumParams = Record[Idx++];
837 SmallVector<ParmVarDecl *, 16> Params;
838 Params.reserve(NumParams);
839 for (unsigned I = 0; I != NumParams; ++I)
840 Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
841 FD->setParams(Reader.getContext(), Params);
844 void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
847 // Load the body on-demand. Most clients won't care, because method
848 // definitions rarely show up in headers.
849 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
850 HasPendingBody = true;
851 MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>(Record, Idx));
852 MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>(Record, Idx));
854 MD->setInstanceMethod(Record[Idx++]);
855 MD->setVariadic(Record[Idx++]);
856 MD->setPropertyAccessor(Record[Idx++]);
857 MD->setDefined(Record[Idx++]);
858 MD->IsOverriding = Record[Idx++];
859 MD->HasSkippedBody = Record[Idx++];
861 MD->IsRedeclaration = Record[Idx++];
862 MD->HasRedeclaration = Record[Idx++];
863 if (MD->HasRedeclaration)
864 Reader.getContext().setObjCMethodRedeclaration(MD,
865 ReadDeclAs<ObjCMethodDecl>(Record, Idx));
867 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record[Idx++]);
868 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record[Idx++]);
869 MD->SetRelatedResultType(Record[Idx++]);
870 MD->setReturnType(Reader.readType(F, Record, Idx));
871 MD->setReturnTypeSourceInfo(GetTypeSourceInfo(Record, Idx));
872 MD->DeclEndLoc = ReadSourceLocation(Record, Idx);
873 unsigned NumParams = Record[Idx++];
874 SmallVector<ParmVarDecl *, 16> Params;
875 Params.reserve(NumParams);
876 for (unsigned I = 0; I != NumParams; ++I)
877 Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
879 MD->SelLocsKind = Record[Idx++];
880 unsigned NumStoredSelLocs = Record[Idx++];
881 SmallVector<SourceLocation, 16> SelLocs;
882 SelLocs.reserve(NumStoredSelLocs);
883 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
884 SelLocs.push_back(ReadSourceLocation(Record, Idx));
886 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
889 void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
890 VisitTypedefNameDecl(D);
892 D->Variance = Record[Idx++];
893 D->Index = Record[Idx++];
894 D->VarianceLoc = ReadSourceLocation(Record, Idx);
895 D->ColonLoc = ReadSourceLocation(Record, Idx);
898 void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
900 CD->setAtStartLoc(ReadSourceLocation(Record, Idx));
901 CD->setAtEndRange(ReadSourceRange(Record, Idx));
904 ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
905 unsigned numParams = Record[Idx++];
909 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
910 typeParams.reserve(numParams);
911 for (unsigned i = 0; i != numParams; ++i) {
912 auto typeParam = ReadDeclAs<ObjCTypeParamDecl>(Record, Idx);
916 typeParams.push_back(typeParam);
919 SourceLocation lAngleLoc = ReadSourceLocation(Record, Idx);
920 SourceLocation rAngleLoc = ReadSourceLocation(Record, Idx);
922 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
923 typeParams, rAngleLoc);
926 void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
927 RedeclarableResult Redecl = VisitRedeclarable(ID);
928 VisitObjCContainerDecl(ID);
929 TypeIDForTypeDecl = Reader.getGlobalTypeID(F, Record[Idx++]);
930 mergeRedeclarable(ID, Redecl);
932 ID->TypeParamList = ReadObjCTypeParamList();
934 // Read the definition.
935 ID->allocateDefinitionData();
937 // Set the definition data of the canonical declaration, so other
938 // redeclarations will see it.
939 ID->getCanonicalDecl()->Data = ID->Data;
941 ObjCInterfaceDecl::DefinitionData &Data = ID->data();
943 // Read the superclass.
944 Data.SuperClassTInfo = GetTypeSourceInfo(Record, Idx);
946 Data.EndLoc = ReadSourceLocation(Record, Idx);
947 Data.HasDesignatedInitializers = Record[Idx++];
949 // Read the directly referenced protocols and their SourceLocations.
950 unsigned NumProtocols = Record[Idx++];
951 SmallVector<ObjCProtocolDecl *, 16> Protocols;
952 Protocols.reserve(NumProtocols);
953 for (unsigned I = 0; I != NumProtocols; ++I)
954 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
955 SmallVector<SourceLocation, 16> ProtoLocs;
956 ProtoLocs.reserve(NumProtocols);
957 for (unsigned I = 0; I != NumProtocols; ++I)
958 ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
959 ID->setProtocolList(Protocols.data(), NumProtocols, ProtoLocs.data(),
960 Reader.getContext());
962 // Read the transitive closure of protocols referenced by this class.
963 NumProtocols = Record[Idx++];
965 Protocols.reserve(NumProtocols);
966 for (unsigned I = 0; I != NumProtocols; ++I)
967 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
968 ID->data().AllReferencedProtocols.set(Protocols.data(), NumProtocols,
969 Reader.getContext());
971 // We will rebuild this list lazily.
972 ID->setIvarList(nullptr);
974 // Note that we have deserialized a definition.
975 Reader.PendingDefinitions.insert(ID);
977 // Note that we've loaded this Objective-C class.
978 Reader.ObjCClassesLoaded.push_back(ID);
980 ID->Data = ID->getCanonicalDecl()->Data;
984 void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
986 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record[Idx++]);
987 // This field will be built lazily.
988 IVD->setNextIvar(nullptr);
989 bool synth = Record[Idx++];
990 IVD->setSynthesize(synth);
993 void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
994 RedeclarableResult Redecl = VisitRedeclarable(PD);
995 VisitObjCContainerDecl(PD);
996 mergeRedeclarable(PD, Redecl);
999 // Read the definition.
1000 PD->allocateDefinitionData();
1002 // Set the definition data of the canonical declaration, so other
1003 // redeclarations will see it.
1004 PD->getCanonicalDecl()->Data = PD->Data;
1006 unsigned NumProtoRefs = Record[Idx++];
1007 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1008 ProtoRefs.reserve(NumProtoRefs);
1009 for (unsigned I = 0; I != NumProtoRefs; ++I)
1010 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
1011 SmallVector<SourceLocation, 16> ProtoLocs;
1012 ProtoLocs.reserve(NumProtoRefs);
1013 for (unsigned I = 0; I != NumProtoRefs; ++I)
1014 ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
1015 PD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1016 Reader.getContext());
1018 // Note that we have deserialized a definition.
1019 Reader.PendingDefinitions.insert(PD);
1021 PD->Data = PD->getCanonicalDecl()->Data;
1025 void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1029 void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1030 VisitObjCContainerDecl(CD);
1031 CD->setCategoryNameLoc(ReadSourceLocation(Record, Idx));
1032 CD->setIvarLBraceLoc(ReadSourceLocation(Record, Idx));
1033 CD->setIvarRBraceLoc(ReadSourceLocation(Record, Idx));
1035 // Note that this category has been deserialized. We do this before
1036 // deserializing the interface declaration, so that it will consider this
1038 Reader.CategoriesDeserialized.insert(CD);
1040 CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>(Record, Idx);
1041 CD->TypeParamList = ReadObjCTypeParamList();
1042 unsigned NumProtoRefs = Record[Idx++];
1043 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1044 ProtoRefs.reserve(NumProtoRefs);
1045 for (unsigned I = 0; I != NumProtoRefs; ++I)
1046 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
1047 SmallVector<SourceLocation, 16> ProtoLocs;
1048 ProtoLocs.reserve(NumProtoRefs);
1049 for (unsigned I = 0; I != NumProtoRefs; ++I)
1050 ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
1051 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1052 Reader.getContext());
1055 void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1056 VisitNamedDecl(CAD);
1057 CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
1060 void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1062 D->setAtLoc(ReadSourceLocation(Record, Idx));
1063 D->setLParenLoc(ReadSourceLocation(Record, Idx));
1064 QualType T = Reader.readType(F, Record, Idx);
1065 TypeSourceInfo *TSI = GetTypeSourceInfo(Record, Idx);
1067 D->setPropertyAttributes(
1068 (ObjCPropertyDecl::PropertyAttributeKind)Record[Idx++]);
1069 D->setPropertyAttributesAsWritten(
1070 (ObjCPropertyDecl::PropertyAttributeKind)Record[Idx++]);
1071 D->setPropertyImplementation(
1072 (ObjCPropertyDecl::PropertyControl)Record[Idx++]);
1073 D->setGetterName(Reader.ReadDeclarationName(F,Record, Idx).getObjCSelector());
1074 D->setSetterName(Reader.ReadDeclarationName(F,Record, Idx).getObjCSelector());
1075 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>(Record, Idx));
1076 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>(Record, Idx));
1077 D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>(Record, Idx));
1080 void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1081 VisitObjCContainerDecl(D);
1082 D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
1085 void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1086 VisitObjCImplDecl(D);
1087 D->setIdentifier(Reader.GetIdentifierInfo(F, Record, Idx));
1088 D->CategoryNameLoc = ReadSourceLocation(Record, Idx);
1091 void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1092 VisitObjCImplDecl(D);
1093 D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
1094 D->SuperLoc = ReadSourceLocation(Record, Idx);
1095 D->setIvarLBraceLoc(ReadSourceLocation(Record, Idx));
1096 D->setIvarRBraceLoc(ReadSourceLocation(Record, Idx));
1097 D->setHasNonZeroConstructors(Record[Idx++]);
1098 D->setHasDestructors(Record[Idx++]);
1099 D->NumIvarInitializers = Record[Idx++];
1100 if (D->NumIvarInitializers)
1101 D->IvarInitializers = Reader.ReadCXXCtorInitializersRef(F, Record, Idx);
1104 void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1106 D->setAtLoc(ReadSourceLocation(Record, Idx));
1107 D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>(Record, Idx));
1108 D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>(Record, Idx);
1109 D->IvarLoc = ReadSourceLocation(Record, Idx);
1110 D->setGetterCXXConstructor(Reader.ReadExpr(F));
1111 D->setSetterCXXAssignment(Reader.ReadExpr(F));
1114 void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1115 VisitDeclaratorDecl(FD);
1116 FD->Mutable = Record[Idx++];
1117 if (int BitWidthOrInitializer = Record[Idx++]) {
1118 FD->InitStorage.setInt(
1119 static_cast<FieldDecl::InitStorageKind>(BitWidthOrInitializer - 1));
1120 if (FD->InitStorage.getInt() == FieldDecl::ISK_CapturedVLAType) {
1121 // Read captured variable length array.
1122 FD->InitStorage.setPointer(
1123 Reader.readType(F, Record, Idx).getAsOpaquePtr());
1125 FD->InitStorage.setPointer(Reader.ReadExpr(F));
1128 if (!FD->getDeclName()) {
1129 if (FieldDecl *Tmpl = ReadDeclAs<FieldDecl>(Record, Idx))
1130 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1135 void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1136 VisitDeclaratorDecl(PD);
1137 PD->GetterId = Reader.GetIdentifierInfo(F, Record, Idx);
1138 PD->SetterId = Reader.GetIdentifierInfo(F, Record, Idx);
1141 void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1144 FD->ChainingSize = Record[Idx++];
1145 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1146 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1148 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1149 FD->Chaining[I] = ReadDeclAs<NamedDecl>(Record, Idx);
1154 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1155 RedeclarableResult Redecl = VisitRedeclarable(VD);
1156 VisitDeclaratorDecl(VD);
1158 VD->VarDeclBits.SClass = (StorageClass)Record[Idx++];
1159 VD->VarDeclBits.TSCSpec = Record[Idx++];
1160 VD->VarDeclBits.InitStyle = Record[Idx++];
1161 if (!isa<ParmVarDecl>(VD)) {
1162 VD->NonParmVarDeclBits.ExceptionVar = Record[Idx++];
1163 VD->NonParmVarDeclBits.NRVOVariable = Record[Idx++];
1164 VD->NonParmVarDeclBits.CXXForRangeDecl = Record[Idx++];
1165 VD->NonParmVarDeclBits.ARCPseudoStrong = Record[Idx++];
1166 VD->NonParmVarDeclBits.IsConstexpr = Record[Idx++];
1167 VD->NonParmVarDeclBits.IsInitCapture = Record[Idx++];
1168 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record[Idx++];
1170 Linkage VarLinkage = Linkage(Record[Idx++]);
1171 VD->setCachedLinkage(VarLinkage);
1173 // Reconstruct the one piece of the IdentifierNamespace that we need.
1174 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1175 VD->getLexicalDeclContext()->isFunctionOrMethod())
1176 VD->setLocalExternDecl();
1178 if (uint64_t Val = Record[Idx++]) {
1179 VD->setInit(Reader.ReadExpr(F));
1181 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1182 Eval->CheckedICE = true;
1183 Eval->IsICE = Val == 3;
1188 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1190 switch ((VarKind)Record[Idx++]) {
1191 case VarNotTemplate:
1192 // Only true variables (not parameters or implicit parameters) can be
1193 // merged; the other kinds are not really redeclarable at all.
1194 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1195 !isa<VarTemplateSpecializationDecl>(VD))
1196 mergeRedeclarable(VD, Redecl);
1199 // Merged when we merge the template.
1200 VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>(Record, Idx));
1202 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1203 VarDecl *Tmpl = ReadDeclAs<VarDecl>(Record, Idx);
1204 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
1205 SourceLocation POI = ReadSourceLocation(Record, Idx);
1206 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1207 mergeRedeclarable(VD, Redecl);
1215 void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1219 void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1221 unsigned isObjCMethodParam = Record[Idx++];
1222 unsigned scopeDepth = Record[Idx++];
1223 unsigned scopeIndex = Record[Idx++];
1224 unsigned declQualifier = Record[Idx++];
1225 if (isObjCMethodParam) {
1226 assert(scopeDepth == 0);
1227 PD->setObjCMethodScopeInfo(scopeIndex);
1228 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1230 PD->setScopeInfo(scopeDepth, scopeIndex);
1232 PD->ParmVarDeclBits.IsKNRPromoted = Record[Idx++];
1233 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record[Idx++];
1234 if (Record[Idx++]) // hasUninstantiatedDefaultArg.
1235 PD->setUninstantiatedDefaultArg(Reader.ReadExpr(F));
1237 // FIXME: If this is a redeclaration of a function from another module, handle
1238 // inheritance of default arguments.
1241 void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1243 AD->setAsmString(cast<StringLiteral>(Reader.ReadExpr(F)));
1244 AD->setRParenLoc(ReadSourceLocation(Record, Idx));
1247 void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1249 BD->setBody(cast_or_null<CompoundStmt>(Reader.ReadStmt(F)));
1250 BD->setSignatureAsWritten(GetTypeSourceInfo(Record, Idx));
1251 unsigned NumParams = Record[Idx++];
1252 SmallVector<ParmVarDecl *, 16> Params;
1253 Params.reserve(NumParams);
1254 for (unsigned I = 0; I != NumParams; ++I)
1255 Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
1256 BD->setParams(Params);
1258 BD->setIsVariadic(Record[Idx++]);
1259 BD->setBlockMissingReturnType(Record[Idx++]);
1260 BD->setIsConversionFromLambda(Record[Idx++]);
1262 bool capturesCXXThis = Record[Idx++];
1263 unsigned numCaptures = Record[Idx++];
1264 SmallVector<BlockDecl::Capture, 16> captures;
1265 captures.reserve(numCaptures);
1266 for (unsigned i = 0; i != numCaptures; ++i) {
1267 VarDecl *decl = ReadDeclAs<VarDecl>(Record, Idx);
1268 unsigned flags = Record[Idx++];
1269 bool byRef = (flags & 1);
1270 bool nested = (flags & 2);
1271 Expr *copyExpr = ((flags & 4) ? Reader.ReadExpr(F) : nullptr);
1273 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1275 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1278 void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1280 unsigned ContextParamPos = Record[Idx++];
1281 CD->setNothrow(Record[Idx++] != 0);
1282 // Body is set by VisitCapturedStmt.
1283 for (unsigned I = 0; I < CD->NumParams; ++I) {
1284 if (I != ContextParamPos)
1285 CD->setParam(I, ReadDeclAs<ImplicitParamDecl>(Record, Idx));
1287 CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>(Record, Idx));
1291 void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1293 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record[Idx++]);
1294 D->setExternLoc(ReadSourceLocation(Record, Idx));
1295 D->setRBraceLoc(ReadSourceLocation(Record, Idx));
1298 void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1300 D->setLocStart(ReadSourceLocation(Record, Idx));
1303 void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1304 RedeclarableResult Redecl = VisitRedeclarable(D);
1306 D->setInline(Record[Idx++]);
1307 D->LocStart = ReadSourceLocation(Record, Idx);
1308 D->RBraceLoc = ReadSourceLocation(Record, Idx);
1310 // Defer loading the anonymous namespace until we've finished merging
1311 // this namespace; loading it might load a later declaration of the
1312 // same namespace, and we have an invariant that older declarations
1313 // get merged before newer ones try to merge.
1314 GlobalDeclID AnonNamespace = 0;
1315 if (Redecl.getFirstID() == ThisDeclID) {
1316 AnonNamespace = ReadDeclID(Record, Idx);
1318 // Link this namespace back to the first declaration, which has already
1319 // been deserialized.
1320 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1323 mergeRedeclarable(D, Redecl);
1325 if (AnonNamespace) {
1326 // Each module has its own anonymous namespace, which is disjoint from
1327 // any other module's anonymous namespaces, so don't attach the anonymous
1328 // namespace at all.
1329 NamespaceDecl *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1330 if (F.Kind != MK_ImplicitModule && F.Kind != MK_ExplicitModule)
1331 D->setAnonymousNamespace(Anon);
1335 void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1336 RedeclarableResult Redecl = VisitRedeclarable(D);
1338 D->NamespaceLoc = ReadSourceLocation(Record, Idx);
1339 D->IdentLoc = ReadSourceLocation(Record, Idx);
1340 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1341 D->Namespace = ReadDeclAs<NamedDecl>(Record, Idx);
1342 mergeRedeclarable(D, Redecl);
1345 void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1347 D->setUsingLoc(ReadSourceLocation(Record, Idx));
1348 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1349 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record, Idx);
1350 D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>(Record, Idx));
1351 D->setTypename(Record[Idx++]);
1352 if (NamedDecl *Pattern = ReadDeclAs<NamedDecl>(Record, Idx))
1353 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1357 void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1358 RedeclarableResult Redecl = VisitRedeclarable(D);
1360 D->setTargetDecl(ReadDeclAs<NamedDecl>(Record, Idx));
1361 D->UsingOrNextShadow = ReadDeclAs<NamedDecl>(Record, Idx);
1362 UsingShadowDecl *Pattern = ReadDeclAs<UsingShadowDecl>(Record, Idx);
1364 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1365 mergeRedeclarable(D, Redecl);
1368 void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1370 D->UsingLoc = ReadSourceLocation(Record, Idx);
1371 D->NamespaceLoc = ReadSourceLocation(Record, Idx);
1372 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1373 D->NominatedNamespace = ReadDeclAs<NamedDecl>(Record, Idx);
1374 D->CommonAncestor = ReadDeclAs<DeclContext>(Record, Idx);
1377 void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1379 D->setUsingLoc(ReadSourceLocation(Record, Idx));
1380 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1381 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record, Idx);
1385 void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1386 UnresolvedUsingTypenameDecl *D) {
1388 D->TypenameLocation = ReadSourceLocation(Record, Idx);
1389 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1393 void ASTDeclReader::ReadCXXDefinitionData(
1394 struct CXXRecordDecl::DefinitionData &Data,
1395 const RecordData &Record, unsigned &Idx) {
1396 // Note: the caller has deserialized the IsLambda bit already.
1397 Data.UserDeclaredConstructor = Record[Idx++];
1398 Data.UserDeclaredSpecialMembers = Record[Idx++];
1399 Data.Aggregate = Record[Idx++];
1400 Data.PlainOldData = Record[Idx++];
1401 Data.Empty = Record[Idx++];
1402 Data.Polymorphic = Record[Idx++];
1403 Data.Abstract = Record[Idx++];
1404 Data.IsStandardLayout = Record[Idx++];
1405 Data.HasNoNonEmptyBases = Record[Idx++];
1406 Data.HasPrivateFields = Record[Idx++];
1407 Data.HasProtectedFields = Record[Idx++];
1408 Data.HasPublicFields = Record[Idx++];
1409 Data.HasMutableFields = Record[Idx++];
1410 Data.HasVariantMembers = Record[Idx++];
1411 Data.HasOnlyCMembers = Record[Idx++];
1412 Data.HasInClassInitializer = Record[Idx++];
1413 Data.HasUninitializedReferenceMember = Record[Idx++];
1414 Data.NeedOverloadResolutionForMoveConstructor = Record[Idx++];
1415 Data.NeedOverloadResolutionForMoveAssignment = Record[Idx++];
1416 Data.NeedOverloadResolutionForDestructor = Record[Idx++];
1417 Data.DefaultedMoveConstructorIsDeleted = Record[Idx++];
1418 Data.DefaultedMoveAssignmentIsDeleted = Record[Idx++];
1419 Data.DefaultedDestructorIsDeleted = Record[Idx++];
1420 Data.HasTrivialSpecialMembers = Record[Idx++];
1421 Data.DeclaredNonTrivialSpecialMembers = Record[Idx++];
1422 Data.HasIrrelevantDestructor = Record[Idx++];
1423 Data.HasConstexprNonCopyMoveConstructor = Record[Idx++];
1424 Data.DefaultedDefaultConstructorIsConstexpr = Record[Idx++];
1425 Data.HasConstexprDefaultConstructor = Record[Idx++];
1426 Data.HasNonLiteralTypeFieldsOrBases = Record[Idx++];
1427 Data.ComputedVisibleConversions = Record[Idx++];
1428 Data.UserProvidedDefaultConstructor = Record[Idx++];
1429 Data.DeclaredSpecialMembers = Record[Idx++];
1430 Data.ImplicitCopyConstructorHasConstParam = Record[Idx++];
1431 Data.ImplicitCopyAssignmentHasConstParam = Record[Idx++];
1432 Data.HasDeclaredCopyConstructorWithConstParam = Record[Idx++];
1433 Data.HasDeclaredCopyAssignmentWithConstParam = Record[Idx++];
1435 Data.NumBases = Record[Idx++];
1437 Data.Bases = Reader.readCXXBaseSpecifiers(F, Record, Idx);
1438 Data.NumVBases = Record[Idx++];
1440 Data.VBases = Reader.readCXXBaseSpecifiers(F, Record, Idx);
1442 Reader.ReadUnresolvedSet(F, Data.Conversions, Record, Idx);
1443 Reader.ReadUnresolvedSet(F, Data.VisibleConversions, Record, Idx);
1444 assert(Data.Definition && "Data.Definition should be already set!");
1445 Data.FirstFriend = ReadDeclID(Record, Idx);
1447 if (Data.IsLambda) {
1448 typedef LambdaCapture Capture;
1449 CXXRecordDecl::LambdaDefinitionData &Lambda
1450 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1451 Lambda.Dependent = Record[Idx++];
1452 Lambda.IsGenericLambda = Record[Idx++];
1453 Lambda.CaptureDefault = Record[Idx++];
1454 Lambda.NumCaptures = Record[Idx++];
1455 Lambda.NumExplicitCaptures = Record[Idx++];
1456 Lambda.ManglingNumber = Record[Idx++];
1457 Lambda.ContextDecl = ReadDecl(Record, Idx);
1459 = (Capture*)Reader.Context.Allocate(sizeof(Capture)*Lambda.NumCaptures);
1460 Capture *ToCapture = Lambda.Captures;
1461 Lambda.MethodTyInfo = GetTypeSourceInfo(Record, Idx);
1462 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1463 SourceLocation Loc = ReadSourceLocation(Record, Idx);
1464 bool IsImplicit = Record[Idx++];
1465 LambdaCaptureKind Kind = static_cast<LambdaCaptureKind>(Record[Idx++]);
1469 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1473 VarDecl *Var = ReadDeclAs<VarDecl>(Record, Idx);
1474 SourceLocation EllipsisLoc = ReadSourceLocation(Record, Idx);
1475 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1482 void ASTDeclReader::MergeDefinitionData(
1483 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1484 assert(D->DefinitionData.getNotUpdated() &&
1485 "merging class definition into non-definition");
1486 auto &DD = *D->DefinitionData.getNotUpdated();
1488 if (DD.Definition != MergeDD.Definition) {
1489 // Track that we merged the definitions.
1490 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1492 Reader.PendingDefinitions.erase(MergeDD.Definition);
1493 MergeDD.Definition->IsCompleteDefinition = false;
1494 mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1495 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1496 "already loaded pending lookups for merged definition");
1499 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1500 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1501 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1502 // We faked up this definition data because we found a class for which we'd
1503 // not yet loaded the definition. Replace it with the real thing now.
1504 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1505 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1507 // Don't change which declaration is the definition; that is required
1508 // to be invariant once we select it.
1509 auto *Def = DD.Definition;
1510 DD = std::move(MergeDD);
1511 DD.Definition = Def;
1515 // FIXME: Move this out into a .def file?
1516 bool DetectedOdrViolation = false;
1517 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1518 #define MATCH_FIELD(Field) \
1519 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1521 MATCH_FIELD(UserDeclaredConstructor)
1522 MATCH_FIELD(UserDeclaredSpecialMembers)
1523 MATCH_FIELD(Aggregate)
1524 MATCH_FIELD(PlainOldData)
1526 MATCH_FIELD(Polymorphic)
1527 MATCH_FIELD(Abstract)
1528 MATCH_FIELD(IsStandardLayout)
1529 MATCH_FIELD(HasNoNonEmptyBases)
1530 MATCH_FIELD(HasPrivateFields)
1531 MATCH_FIELD(HasProtectedFields)
1532 MATCH_FIELD(HasPublicFields)
1533 MATCH_FIELD(HasMutableFields)
1534 MATCH_FIELD(HasVariantMembers)
1535 MATCH_FIELD(HasOnlyCMembers)
1536 MATCH_FIELD(HasInClassInitializer)
1537 MATCH_FIELD(HasUninitializedReferenceMember)
1538 MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1539 MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1540 MATCH_FIELD(NeedOverloadResolutionForDestructor)
1541 MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1542 MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1543 MATCH_FIELD(DefaultedDestructorIsDeleted)
1544 OR_FIELD(HasTrivialSpecialMembers)
1545 OR_FIELD(DeclaredNonTrivialSpecialMembers)
1546 MATCH_FIELD(HasIrrelevantDestructor)
1547 OR_FIELD(HasConstexprNonCopyMoveConstructor)
1548 MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1549 OR_FIELD(HasConstexprDefaultConstructor)
1550 MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1551 // ComputedVisibleConversions is handled below.
1552 MATCH_FIELD(UserProvidedDefaultConstructor)
1553 OR_FIELD(DeclaredSpecialMembers)
1554 MATCH_FIELD(ImplicitCopyConstructorHasConstParam)
1555 MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1556 OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1557 OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1558 MATCH_FIELD(IsLambda)
1562 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1563 DetectedOdrViolation = true;
1564 // FIXME: Issue a diagnostic if the base classes don't match when we come
1565 // to lazily load them.
1567 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1568 // match when we come to lazily load them.
1569 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1570 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1571 DD.ComputedVisibleConversions = true;
1574 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1578 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1579 // when they occur within the body of a function template specialization).
1582 if (DetectedOdrViolation)
1583 Reader.PendingOdrMergeFailures[DD.Definition].push_back(MergeDD.Definition);
1586 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1587 struct CXXRecordDecl::DefinitionData *DD;
1588 ASTContext &C = Reader.getContext();
1590 // Determine whether this is a lambda closure type, so that we can
1591 // allocate the appropriate DefinitionData structure.
1592 bool IsLambda = Record[Idx++];
1594 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1597 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1599 ReadCXXDefinitionData(*DD, Record, Idx);
1601 // We might already have a definition for this record. This can happen either
1602 // because we're reading an update record, or because we've already done some
1603 // merging. Either way, just merge into it.
1604 CXXRecordDecl *Canon = D->getCanonicalDecl();
1605 if (Canon->DefinitionData.getNotUpdated()) {
1606 MergeDefinitionData(Canon, std::move(*DD));
1607 D->DefinitionData = Canon->DefinitionData;
1611 // Mark this declaration as being a definition.
1612 D->IsCompleteDefinition = true;
1613 D->DefinitionData = DD;
1615 // If this is not the first declaration or is an update record, we can have
1616 // other redeclarations already. Make a note that we need to propagate the
1617 // DefinitionData pointer onto them.
1618 if (Update || Canon != D) {
1619 Canon->DefinitionData = D->DefinitionData;
1620 Reader.PendingDefinitions.insert(D);
1624 ASTDeclReader::RedeclarableResult
1625 ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1626 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1628 ASTContext &C = Reader.getContext();
1631 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1633 switch ((CXXRecKind)Record[Idx++]) {
1634 case CXXRecNotTemplate:
1635 // Merged when we merge the folding set entry in the primary template.
1636 if (!isa<ClassTemplateSpecializationDecl>(D))
1637 mergeRedeclarable(D, Redecl);
1639 case CXXRecTemplate: {
1640 // Merged when we merge the template.
1641 ClassTemplateDecl *Template = ReadDeclAs<ClassTemplateDecl>(Record, Idx);
1642 D->TemplateOrInstantiation = Template;
1643 if (!Template->getTemplatedDecl()) {
1644 // We've not actually loaded the ClassTemplateDecl yet, because we're
1645 // currently being loaded as its pattern. Rely on it to set up our
1646 // TypeForDecl (see VisitClassTemplateDecl).
1648 // Beware: we do not yet know our canonical declaration, and may still
1649 // get merged once the surrounding class template has got off the ground.
1650 TypeIDForTypeDecl = 0;
1654 case CXXRecMemberSpecialization: {
1655 CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>(Record, Idx);
1656 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
1657 SourceLocation POI = ReadSourceLocation(Record, Idx);
1658 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1659 MSI->setPointOfInstantiation(POI);
1660 D->TemplateOrInstantiation = MSI;
1661 mergeRedeclarable(D, Redecl);
1666 bool WasDefinition = Record[Idx++];
1668 ReadCXXRecordDefinition(D, /*Update*/false);
1670 // Propagate DefinitionData pointer from the canonical declaration.
1671 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1673 // Lazily load the key function to avoid deserializing every method so we can
1675 if (WasDefinition) {
1676 DeclID KeyFn = ReadDeclID(Record, Idx);
1677 if (KeyFn && D->IsCompleteDefinition)
1678 // FIXME: This is wrong for the ARM ABI, where some other module may have
1679 // made this function no longer be a key function. We need an update
1680 // record or similar for that case.
1681 C.KeyFunctions[D] = KeyFn;
1687 void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1688 VisitFunctionDecl(D);
1690 unsigned NumOverridenMethods = Record[Idx++];
1691 if (D->isCanonicalDecl()) {
1692 while (NumOverridenMethods--) {
1693 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1694 // MD may be initializing.
1695 if (CXXMethodDecl *MD = ReadDeclAs<CXXMethodDecl>(Record, Idx))
1696 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1699 // We don't care about which declarations this used to override; we get
1700 // the relevant information from the canonical declaration.
1701 Idx += NumOverridenMethods;
1705 void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1706 VisitCXXMethodDecl(D);
1708 if (auto *CD = ReadDeclAs<CXXConstructorDecl>(Record, Idx))
1709 if (D->isCanonicalDecl())
1710 D->setInheritedConstructor(CD->getCanonicalDecl());
1711 D->IsExplicitSpecified = Record[Idx++];
1714 void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1715 VisitCXXMethodDecl(D);
1717 if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>(Record, Idx)) {
1718 auto *Canon = cast<CXXDestructorDecl>(D->getCanonicalDecl());
1719 // FIXME: Check consistency if we have an old and new operator delete.
1720 if (!Canon->OperatorDelete)
1721 Canon->OperatorDelete = OperatorDelete;
1725 void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1726 VisitCXXMethodDecl(D);
1727 D->IsExplicitSpecified = Record[Idx++];
1730 void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1732 D->ImportedAndComplete.setPointer(readModule(Record, Idx));
1733 D->ImportedAndComplete.setInt(Record[Idx++]);
1734 SourceLocation *StoredLocs = D->getTrailingObjects<SourceLocation>();
1735 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1736 StoredLocs[I] = ReadSourceLocation(Record, Idx);
1737 ++Idx; // The number of stored source locations.
1740 void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1742 D->setColonLoc(ReadSourceLocation(Record, Idx));
1745 void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1747 if (Record[Idx++]) // hasFriendDecl
1748 D->Friend = ReadDeclAs<NamedDecl>(Record, Idx);
1750 D->Friend = GetTypeSourceInfo(Record, Idx);
1751 for (unsigned i = 0; i != D->NumTPLists; ++i)
1752 D->getTrailingObjects<TemplateParameterList *>()[i] =
1753 Reader.ReadTemplateParameterList(F, Record, Idx);
1754 D->NextFriend = ReadDeclID(Record, Idx);
1755 D->UnsupportedFriend = (Record[Idx++] != 0);
1756 D->FriendLoc = ReadSourceLocation(Record, Idx);
1759 void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1761 unsigned NumParams = Record[Idx++];
1762 D->NumParams = NumParams;
1763 D->Params = new TemplateParameterList*[NumParams];
1764 for (unsigned i = 0; i != NumParams; ++i)
1765 D->Params[i] = Reader.ReadTemplateParameterList(F, Record, Idx);
1766 if (Record[Idx++]) // HasFriendDecl
1767 D->Friend = ReadDeclAs<NamedDecl>(Record, Idx);
1769 D->Friend = GetTypeSourceInfo(Record, Idx);
1770 D->FriendLoc = ReadSourceLocation(Record, Idx);
1773 DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
1776 DeclID PatternID = ReadDeclID(Record, Idx);
1777 NamedDecl *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
1778 TemplateParameterList* TemplateParams
1779 = Reader.ReadTemplateParameterList(F, Record, Idx);
1780 D->init(TemplatedDecl, TemplateParams);
1785 ASTDeclReader::RedeclarableResult
1786 ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1787 RedeclarableResult Redecl = VisitRedeclarable(D);
1789 // Make sure we've allocated the Common pointer first. We do this before
1790 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
1791 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
1792 if (!CanonD->Common) {
1793 CanonD->Common = CanonD->newCommon(Reader.getContext());
1794 Reader.PendingDefinitions.insert(CanonD);
1796 D->Common = CanonD->Common;
1798 // If this is the first declaration of the template, fill in the information
1799 // for the 'common' pointer.
1800 if (ThisDeclID == Redecl.getFirstID()) {
1801 if (RedeclarableTemplateDecl *RTD
1802 = ReadDeclAs<RedeclarableTemplateDecl>(Record, Idx)) {
1803 assert(RTD->getKind() == D->getKind() &&
1804 "InstantiatedFromMemberTemplate kind mismatch");
1805 D->setInstantiatedFromMemberTemplate(RTD);
1807 D->setMemberSpecialization();
1811 DeclID PatternID = VisitTemplateDecl(D);
1812 D->IdentifierNamespace = Record[Idx++];
1814 mergeRedeclarable(D, Redecl, PatternID);
1816 // If we merged the template with a prior declaration chain, merge the common
1818 // FIXME: Actually merge here, don't just overwrite.
1819 D->Common = D->getCanonicalDecl()->Common;
1824 static DeclID *newDeclIDList(ASTContext &Context, DeclID *Old,
1825 SmallVectorImpl<DeclID> &IDs) {
1826 assert(!IDs.empty() && "no IDs to add to list");
1828 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
1829 std::sort(IDs.begin(), IDs.end());
1830 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
1833 auto *Result = new (Context) DeclID[1 + IDs.size()];
1834 *Result = IDs.size();
1835 std::copy(IDs.begin(), IDs.end(), Result + 1);
1839 void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1840 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
1842 if (ThisDeclID == Redecl.getFirstID()) {
1843 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
1844 // the specializations.
1845 SmallVector<serialization::DeclID, 32> SpecIDs;
1846 ReadDeclIDList(SpecIDs);
1848 if (!SpecIDs.empty()) {
1849 auto *CommonPtr = D->getCommonPtr();
1850 CommonPtr->LazySpecializations = newDeclIDList(
1851 Reader.getContext(), CommonPtr->LazySpecializations, SpecIDs);
1855 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
1856 // We were loaded before our templated declaration was. We've not set up
1857 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
1859 Reader.Context.getInjectedClassNameType(
1860 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
1864 void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
1865 llvm_unreachable("BuiltinTemplates are not serialized");
1868 /// TODO: Unify with ClassTemplateDecl version?
1869 /// May require unifying ClassTemplateDecl and
1870 /// VarTemplateDecl beyond TemplateDecl...
1871 void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
1872 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
1874 if (ThisDeclID == Redecl.getFirstID()) {
1875 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
1876 // the specializations.
1877 SmallVector<serialization::DeclID, 32> SpecIDs;
1878 ReadDeclIDList(SpecIDs);
1880 if (!SpecIDs.empty()) {
1881 auto *CommonPtr = D->getCommonPtr();
1882 CommonPtr->LazySpecializations = newDeclIDList(
1883 Reader.getContext(), CommonPtr->LazySpecializations, SpecIDs);
1888 ASTDeclReader::RedeclarableResult
1889 ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
1890 ClassTemplateSpecializationDecl *D) {
1891 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
1893 ASTContext &C = Reader.getContext();
1894 if (Decl *InstD = ReadDecl(Record, Idx)) {
1895 if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
1896 D->SpecializedTemplate = CTD;
1898 SmallVector<TemplateArgument, 8> TemplArgs;
1899 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
1900 TemplateArgumentList *ArgList
1901 = TemplateArgumentList::CreateCopy(C, TemplArgs.data(),
1903 ClassTemplateSpecializationDecl::SpecializedPartialSpecialization *PS
1904 = new (C) ClassTemplateSpecializationDecl::
1905 SpecializedPartialSpecialization();
1906 PS->PartialSpecialization
1907 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
1908 PS->TemplateArgs = ArgList;
1909 D->SpecializedTemplate = PS;
1913 SmallVector<TemplateArgument, 8> TemplArgs;
1914 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx,
1915 /*Canonicalize*/ true);
1916 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs.data(),
1918 D->PointOfInstantiation = ReadSourceLocation(Record, Idx);
1919 D->SpecializationKind = (TemplateSpecializationKind)Record[Idx++];
1921 bool writtenAsCanonicalDecl = Record[Idx++];
1922 if (writtenAsCanonicalDecl) {
1923 ClassTemplateDecl *CanonPattern = ReadDeclAs<ClassTemplateDecl>(Record,Idx);
1924 if (D->isCanonicalDecl()) { // It's kept in the folding set.
1925 // Set this as, or find, the canonical declaration for this specialization
1926 ClassTemplateSpecializationDecl *CanonSpec;
1927 if (ClassTemplatePartialSpecializationDecl *Partial =
1928 dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
1929 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
1930 .GetOrInsertNode(Partial);
1933 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
1935 // If there was already a canonical specialization, merge into it.
1936 if (CanonSpec != D) {
1937 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
1939 // This declaration might be a definition. Merge with any existing
1941 if (auto *DDD = D->DefinitionData.getNotUpdated()) {
1942 if (CanonSpec->DefinitionData.getNotUpdated())
1943 MergeDefinitionData(CanonSpec, std::move(*DDD));
1945 CanonSpec->DefinitionData = D->DefinitionData;
1947 D->DefinitionData = CanonSpec->DefinitionData;
1953 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo(Record, Idx)) {
1954 ClassTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo
1955 = new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
1956 ExplicitInfo->TypeAsWritten = TyInfo;
1957 ExplicitInfo->ExternLoc = ReadSourceLocation(Record, Idx);
1958 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation(Record, Idx);
1959 D->ExplicitInfo = ExplicitInfo;
1965 void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
1966 ClassTemplatePartialSpecializationDecl *D) {
1967 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
1969 D->TemplateParams = Reader.ReadTemplateParameterList(F, Record, Idx);
1970 D->ArgsAsWritten = Reader.ReadASTTemplateArgumentListInfo(F, Record, Idx);
1972 // These are read/set from/to the first declaration.
1973 if (ThisDeclID == Redecl.getFirstID()) {
1974 D->InstantiatedFromMember.setPointer(
1975 ReadDeclAs<ClassTemplatePartialSpecializationDecl>(Record, Idx));
1976 D->InstantiatedFromMember.setInt(Record[Idx++]);
1980 void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
1981 ClassScopeFunctionSpecializationDecl *D) {
1983 D->Specialization = ReadDeclAs<CXXMethodDecl>(Record, Idx);
1986 void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1987 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
1989 if (ThisDeclID == Redecl.getFirstID()) {
1990 // This FunctionTemplateDecl owns a CommonPtr; read it.
1991 SmallVector<serialization::DeclID, 32> SpecIDs;
1992 ReadDeclIDList(SpecIDs);
1994 if (!SpecIDs.empty()) {
1995 auto *CommonPtr = D->getCommonPtr();
1996 CommonPtr->LazySpecializations = newDeclIDList(
1997 Reader.getContext(), CommonPtr->LazySpecializations, SpecIDs);
2002 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2003 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2004 /// VarTemplate(Partial)SpecializationDecl with a new data
2005 /// structure Template(Partial)SpecializationDecl, and
2006 /// using Template(Partial)SpecializationDecl as input type.
2007 ASTDeclReader::RedeclarableResult
2008 ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2009 VarTemplateSpecializationDecl *D) {
2010 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2012 ASTContext &C = Reader.getContext();
2013 if (Decl *InstD = ReadDecl(Record, Idx)) {
2014 if (VarTemplateDecl *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2015 D->SpecializedTemplate = VTD;
2017 SmallVector<TemplateArgument, 8> TemplArgs;
2018 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
2019 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2020 C, TemplArgs.data(), TemplArgs.size());
2021 VarTemplateSpecializationDecl::SpecializedPartialSpecialization *PS =
2023 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2024 PS->PartialSpecialization =
2025 cast<VarTemplatePartialSpecializationDecl>(InstD);
2026 PS->TemplateArgs = ArgList;
2027 D->SpecializedTemplate = PS;
2032 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo(Record, Idx)) {
2033 VarTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo =
2034 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2035 ExplicitInfo->TypeAsWritten = TyInfo;
2036 ExplicitInfo->ExternLoc = ReadSourceLocation(Record, Idx);
2037 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation(Record, Idx);
2038 D->ExplicitInfo = ExplicitInfo;
2041 SmallVector<TemplateArgument, 8> TemplArgs;
2042 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx,
2043 /*Canonicalize*/ true);
2045 TemplateArgumentList::CreateCopy(C, TemplArgs.data(), TemplArgs.size());
2046 D->PointOfInstantiation = ReadSourceLocation(Record, Idx);
2047 D->SpecializationKind = (TemplateSpecializationKind)Record[Idx++];
2049 bool writtenAsCanonicalDecl = Record[Idx++];
2050 if (writtenAsCanonicalDecl) {
2051 VarTemplateDecl *CanonPattern = ReadDeclAs<VarTemplateDecl>(Record, Idx);
2052 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2053 // FIXME: If it's already present, merge it.
2054 if (VarTemplatePartialSpecializationDecl *Partial =
2055 dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2056 CanonPattern->getCommonPtr()->PartialSpecializations
2057 .GetOrInsertNode(Partial);
2059 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2067 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2068 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2069 /// VarTemplate(Partial)SpecializationDecl with a new data
2070 /// structure Template(Partial)SpecializationDecl, and
2071 /// using Template(Partial)SpecializationDecl as input type.
2072 void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2073 VarTemplatePartialSpecializationDecl *D) {
2074 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2076 D->TemplateParams = Reader.ReadTemplateParameterList(F, Record, Idx);
2077 D->ArgsAsWritten = Reader.ReadASTTemplateArgumentListInfo(F, Record, Idx);
2079 // These are read/set from/to the first declaration.
2080 if (ThisDeclID == Redecl.getFirstID()) {
2081 D->InstantiatedFromMember.setPointer(
2082 ReadDeclAs<VarTemplatePartialSpecializationDecl>(Record, Idx));
2083 D->InstantiatedFromMember.setInt(Record[Idx++]);
2087 void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2090 D->setDeclaredWithTypename(Record[Idx++]);
2093 D->setDefaultArgument(GetTypeSourceInfo(Record, Idx));
2096 void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2097 VisitDeclaratorDecl(D);
2098 // TemplateParmPosition.
2099 D->setDepth(Record[Idx++]);
2100 D->setPosition(Record[Idx++]);
2101 if (D->isExpandedParameterPack()) {
2102 auto TypesAndInfos =
2103 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2104 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2105 new (&TypesAndInfos[I].first) QualType(Reader.readType(F, Record, Idx));
2106 TypesAndInfos[I].second = GetTypeSourceInfo(Record, Idx);
2109 // Rest of NonTypeTemplateParmDecl.
2110 D->ParameterPack = Record[Idx++];
2112 D->setDefaultArgument(Reader.ReadExpr(F));
2116 void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2117 VisitTemplateDecl(D);
2118 // TemplateParmPosition.
2119 D->setDepth(Record[Idx++]);
2120 D->setPosition(Record[Idx++]);
2121 if (D->isExpandedParameterPack()) {
2122 TemplateParameterList **Data =
2123 D->getTrailingObjects<TemplateParameterList *>();
2124 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2126 Data[I] = Reader.ReadTemplateParameterList(F, Record, Idx);
2128 // Rest of TemplateTemplateParmDecl.
2129 D->ParameterPack = Record[Idx++];
2131 D->setDefaultArgument(Reader.getContext(),
2132 Reader.ReadTemplateArgumentLoc(F, Record, Idx));
2136 void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2137 VisitRedeclarableTemplateDecl(D);
2140 void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2142 D->AssertExprAndFailed.setPointer(Reader.ReadExpr(F));
2143 D->AssertExprAndFailed.setInt(Record[Idx++]);
2144 D->Message = cast<StringLiteral>(Reader.ReadExpr(F));
2145 D->RParenLoc = ReadSourceLocation(Record, Idx);
2148 void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2152 std::pair<uint64_t, uint64_t>
2153 ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2154 uint64_t LexicalOffset = Record[Idx++];
2155 uint64_t VisibleOffset = Record[Idx++];
2156 return std::make_pair(LexicalOffset, VisibleOffset);
2159 template <typename T>
2160 ASTDeclReader::RedeclarableResult
2161 ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2162 DeclID FirstDeclID = ReadDeclID(Record, Idx);
2163 Decl *MergeWith = nullptr;
2165 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2166 bool IsFirstLocalDecl = false;
2168 uint64_t RedeclOffset = 0;
2170 // 0 indicates that this declaration was the only declaration of its entity,
2171 // and is used for space optimization.
2172 if (FirstDeclID == 0) {
2173 FirstDeclID = ThisDeclID;
2175 IsFirstLocalDecl = true;
2176 } else if (unsigned N = Record[Idx++]) {
2177 // This declaration was the first local declaration, but may have imported
2178 // other declarations.
2180 IsFirstLocalDecl = true;
2182 // We have some declarations that must be before us in our redeclaration
2183 // chain. Read them now, and remember that we ought to merge with one of
2185 // FIXME: Provide a known merge target to the second and subsequent such
2187 for (unsigned I = 0; I != N - 1; ++I)
2188 MergeWith = ReadDecl(Record, Idx/*, MergeWith*/);
2190 RedeclOffset = Record[Idx++];
2192 // This declaration was not the first local declaration. Read the first
2193 // local declaration now, to trigger the import of other redeclarations.
2194 (void)ReadDecl(Record, Idx);
2197 T *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2198 if (FirstDecl != D) {
2199 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2200 // We temporarily set the first (canonical) declaration as the previous one
2201 // which is the one that matters and mark the real previous DeclID to be
2202 // loaded & attached later on.
2203 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2204 D->First = FirstDecl->getCanonicalDecl();
2207 T *DAsT = static_cast<T*>(D);
2209 // Note that we need to load local redeclarations of this decl and build a
2210 // decl chain for them. This must happen *after* we perform the preloading
2211 // above; this ensures that the redeclaration chain is built in the correct
2213 if (IsFirstLocalDecl)
2214 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2216 return RedeclarableResult(FirstDeclID, MergeWith, IsKeyDecl);
2219 /// \brief Attempts to merge the given declaration (D) with another declaration
2220 /// of the same entity.
2221 template<typename T>
2222 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2223 RedeclarableResult &Redecl,
2224 DeclID TemplatePatternID) {
2225 T *D = static_cast<T*>(DBase);
2227 // If modules are not available, there is no reason to perform this merge.
2228 if (!Reader.getContext().getLangOpts().Modules)
2231 // If we're not the canonical declaration, we don't need to merge.
2232 if (!DBase->isFirstDecl())
2235 if (auto *Existing = Redecl.getKnownMergeTarget())
2236 // We already know of an existing declaration we should merge with.
2237 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2238 else if (FindExistingResult ExistingRes = findExisting(D))
2239 if (T *Existing = ExistingRes)
2240 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2243 /// \brief "Cast" to type T, asserting if we don't have an implicit conversion.
2244 /// We use this to put code in a template that will only be valid for certain
2246 template<typename T> static T assert_cast(T t) { return t; }
2247 template<typename T> static T assert_cast(...) {
2248 llvm_unreachable("bad assert_cast");
2251 /// \brief Merge together the pattern declarations from two template
2253 void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2254 RedeclarableTemplateDecl *Existing,
2255 DeclID DsID, bool IsKeyDecl) {
2256 auto *DPattern = D->getTemplatedDecl();
2257 auto *ExistingPattern = Existing->getTemplatedDecl();
2258 RedeclarableResult Result(DPattern->getCanonicalDecl()->getGlobalID(),
2259 /*MergeWith*/ ExistingPattern, IsKeyDecl);
2261 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2262 // Merge with any existing definition.
2263 // FIXME: This is duplicated in several places. Refactor.
2264 auto *ExistingClass =
2265 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2266 if (auto *DDD = DClass->DefinitionData.getNotUpdated()) {
2267 if (ExistingClass->DefinitionData.getNotUpdated()) {
2268 MergeDefinitionData(ExistingClass, std::move(*DDD));
2270 ExistingClass->DefinitionData = DClass->DefinitionData;
2271 // We may have skipped this before because we thought that DClass
2272 // was the canonical declaration.
2273 Reader.PendingDefinitions.insert(DClass);
2276 DClass->DefinitionData = ExistingClass->DefinitionData;
2278 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2281 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2282 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2284 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2285 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2286 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2287 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2289 llvm_unreachable("merged an unknown kind of redeclarable template");
2292 /// \brief Attempts to merge the given declaration (D) with another declaration
2293 /// of the same entity.
2294 template<typename T>
2295 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2296 RedeclarableResult &Redecl,
2297 DeclID TemplatePatternID) {
2298 T *D = static_cast<T*>(DBase);
2299 T *ExistingCanon = Existing->getCanonicalDecl();
2300 T *DCanon = D->getCanonicalDecl();
2301 if (ExistingCanon != DCanon) {
2302 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2303 "already merged this declaration");
2305 // Have our redeclaration link point back at the canonical declaration
2306 // of the existing declaration, so that this declaration has the
2307 // appropriate canonical declaration.
2308 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2309 D->First = ExistingCanon;
2311 // When we merge a namespace, update its pointer to the first namespace.
2312 // We cannot have loaded any redeclarations of this declaration yet, so
2313 // there's nothing else that needs to be updated.
2314 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2315 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2316 assert_cast<NamespaceDecl*>(ExistingCanon));
2318 // When we merge a template, merge its pattern.
2319 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2320 mergeTemplatePattern(
2321 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2322 TemplatePatternID, Redecl.isKeyDecl());
2324 // If this declaration is a key declaration, make a note of that.
2325 if (Redecl.isKeyDecl())
2326 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2330 /// \brief Attempts to merge the given declaration (D) with another declaration
2331 /// of the same entity, for the case where the entity is not actually
2332 /// redeclarable. This happens, for instance, when merging the fields of
2333 /// identical class definitions from two different modules.
2334 template<typename T>
2335 void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2336 // If modules are not available, there is no reason to perform this merge.
2337 if (!Reader.getContext().getLangOpts().Modules)
2340 // ODR-based merging is only performed in C++. In C, identically-named things
2341 // in different translation units are not redeclarations (but may still have
2342 // compatible types).
2343 if (!Reader.getContext().getLangOpts().CPlusPlus)
2346 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2347 if (T *Existing = ExistingRes)
2348 Reader.Context.setPrimaryMergedDecl(static_cast<T*>(D),
2349 Existing->getCanonicalDecl());
2352 void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2354 unsigned NumVars = D->varlist_size();
2355 SmallVector<Expr *, 16> Vars;
2356 Vars.reserve(NumVars);
2357 for (unsigned i = 0; i != NumVars; ++i) {
2358 Vars.push_back(Reader.ReadExpr(F));
2363 //===----------------------------------------------------------------------===//
2364 // Attribute Reading
2365 //===----------------------------------------------------------------------===//
2367 /// \brief Reads attributes from the current stream position.
2368 void ASTReader::ReadAttributes(ModuleFile &F, AttrVec &Attrs,
2369 const RecordData &Record, unsigned &Idx) {
2370 for (unsigned i = 0, e = Record[Idx++]; i != e; ++i) {
2371 Attr *New = nullptr;
2372 attr::Kind Kind = (attr::Kind)Record[Idx++];
2373 SourceRange Range = ReadSourceRange(F, Record, Idx);
2375 #include "clang/Serialization/AttrPCHRead.inc"
2377 assert(New && "Unable to decode attribute?");
2378 Attrs.push_back(New);
2382 //===----------------------------------------------------------------------===//
2383 // ASTReader Implementation
2384 //===----------------------------------------------------------------------===//
2386 /// \brief Note that we have loaded the declaration with the given
2389 /// This routine notes that this declaration has already been loaded,
2390 /// so that future GetDecl calls will return this declaration rather
2391 /// than trying to load a new declaration.
2392 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2393 assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2394 DeclsLoaded[Index] = D;
2398 /// \brief Determine whether the consumer will be interested in seeing
2399 /// this declaration (via HandleTopLevelDecl).
2401 /// This routine should return true for anything that might affect
2402 /// code generation, e.g., inline function definitions, Objective-C
2403 /// declarations with metadata, etc.
2404 static bool isConsumerInterestedIn(Decl *D, bool HasBody) {
2405 // An ObjCMethodDecl is never considered as "interesting" because its
2406 // implementation container always is.
2408 if (isa<FileScopeAsmDecl>(D) ||
2409 isa<ObjCProtocolDecl>(D) ||
2410 isa<ObjCImplDecl>(D) ||
2411 isa<ImportDecl>(D) ||
2412 isa<OMPThreadPrivateDecl>(D))
2414 if (VarDecl *Var = dyn_cast<VarDecl>(D))
2415 return Var->isFileVarDecl() &&
2416 Var->isThisDeclarationADefinition() == VarDecl::Definition;
2417 if (FunctionDecl *Func = dyn_cast<FunctionDecl>(D))
2418 return Func->doesThisDeclarationHaveABody() || HasBody;
2423 /// \brief Get the correct cursor and offset for loading a declaration.
2424 ASTReader::RecordLocation
2425 ASTReader::DeclCursorForID(DeclID ID, unsigned &RawLocation) {
2426 // See if there's an override.
2427 DeclReplacementMap::iterator It = ReplacedDecls.find(ID);
2428 if (It != ReplacedDecls.end()) {
2429 RawLocation = It->second.RawLoc;
2430 return RecordLocation(It->second.Mod, It->second.Offset);
2433 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2434 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2435 ModuleFile *M = I->second;
2437 DOffs = M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2438 RawLocation = DOffs.Loc;
2439 return RecordLocation(M, DOffs.BitOffset);
2442 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2443 ContinuousRangeMap<uint64_t, ModuleFile*, 4>::iterator I
2444 = GlobalBitOffsetsMap.find(GlobalOffset);
2446 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2447 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2450 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2451 return LocalOffset + M.GlobalBitOffset;
2454 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2455 const TemplateParameterList *Y);
2457 /// \brief Determine whether two template parameters are similar enough
2458 /// that they may be used in declarations of the same template.
2459 static bool isSameTemplateParameter(const NamedDecl *X,
2460 const NamedDecl *Y) {
2461 if (X->getKind() != Y->getKind())
2464 if (const TemplateTypeParmDecl *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2465 const TemplateTypeParmDecl *TY = cast<TemplateTypeParmDecl>(Y);
2466 return TX->isParameterPack() == TY->isParameterPack();
2469 if (const NonTypeTemplateParmDecl *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2470 const NonTypeTemplateParmDecl *TY = cast<NonTypeTemplateParmDecl>(Y);
2471 return TX->isParameterPack() == TY->isParameterPack() &&
2472 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2475 const TemplateTemplateParmDecl *TX = cast<TemplateTemplateParmDecl>(X);
2476 const TemplateTemplateParmDecl *TY = cast<TemplateTemplateParmDecl>(Y);
2477 return TX->isParameterPack() == TY->isParameterPack() &&
2478 isSameTemplateParameterList(TX->getTemplateParameters(),
2479 TY->getTemplateParameters());
2482 static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2483 if (auto *NS = X->getAsNamespace())
2485 if (auto *NAS = X->getAsNamespaceAlias())
2486 return NAS->getNamespace();
2490 static bool isSameQualifier(const NestedNameSpecifier *X,
2491 const NestedNameSpecifier *Y) {
2492 if (auto *NSX = getNamespace(X)) {
2493 auto *NSY = getNamespace(Y);
2494 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2496 } else if (X->getKind() != Y->getKind())
2499 // FIXME: For namespaces and types, we're permitted to check that the entity
2500 // is named via the same tokens. We should probably do so.
2501 switch (X->getKind()) {
2502 case NestedNameSpecifier::Identifier:
2503 if (X->getAsIdentifier() != Y->getAsIdentifier())
2506 case NestedNameSpecifier::Namespace:
2507 case NestedNameSpecifier::NamespaceAlias:
2508 // We've already checked that we named the same namespace.
2510 case NestedNameSpecifier::TypeSpec:
2511 case NestedNameSpecifier::TypeSpecWithTemplate:
2512 if (X->getAsType()->getCanonicalTypeInternal() !=
2513 Y->getAsType()->getCanonicalTypeInternal())
2516 case NestedNameSpecifier::Global:
2517 case NestedNameSpecifier::Super:
2521 // Recurse into earlier portion of NNS, if any.
2522 auto *PX = X->getPrefix();
2523 auto *PY = Y->getPrefix();
2525 return isSameQualifier(PX, PY);
2529 /// \brief Determine whether two template parameter lists are similar enough
2530 /// that they may be used in declarations of the same template.
2531 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2532 const TemplateParameterList *Y) {
2533 if (X->size() != Y->size())
2536 for (unsigned I = 0, N = X->size(); I != N; ++I)
2537 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2543 /// \brief Determine whether the two declarations refer to the same entity.
2544 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2545 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2550 // Must be in the same context.
2551 if (!X->getDeclContext()->getRedeclContext()->Equals(
2552 Y->getDeclContext()->getRedeclContext()))
2555 // Two typedefs refer to the same entity if they have the same underlying
2557 if (TypedefNameDecl *TypedefX = dyn_cast<TypedefNameDecl>(X))
2558 if (TypedefNameDecl *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2559 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2560 TypedefY->getUnderlyingType());
2562 // Must have the same kind.
2563 if (X->getKind() != Y->getKind())
2566 // Objective-C classes and protocols with the same name always match.
2567 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2570 if (isa<ClassTemplateSpecializationDecl>(X)) {
2571 // No need to handle these here: we merge them when adding them to the
2576 // Compatible tags match.
2577 if (TagDecl *TagX = dyn_cast<TagDecl>(X)) {
2578 TagDecl *TagY = cast<TagDecl>(Y);
2579 return (TagX->getTagKind() == TagY->getTagKind()) ||
2580 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2581 TagX->getTagKind() == TTK_Interface) &&
2582 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2583 TagY->getTagKind() == TTK_Interface));
2586 // Functions with the same type and linkage match.
2587 // FIXME: This needs to cope with merging of prototyped/non-prototyped
2589 if (FunctionDecl *FuncX = dyn_cast<FunctionDecl>(X)) {
2590 FunctionDecl *FuncY = cast<FunctionDecl>(Y);
2591 return (FuncX->getLinkageInternal() == FuncY->getLinkageInternal()) &&
2592 FuncX->getASTContext().hasSameType(FuncX->getType(), FuncY->getType());
2595 // Variables with the same type and linkage match.
2596 if (VarDecl *VarX = dyn_cast<VarDecl>(X)) {
2597 VarDecl *VarY = cast<VarDecl>(Y);
2598 return (VarX->getLinkageInternal() == VarY->getLinkageInternal()) &&
2599 VarX->getASTContext().hasSameType(VarX->getType(), VarY->getType());
2602 // Namespaces with the same name and inlinedness match.
2603 if (NamespaceDecl *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
2604 NamespaceDecl *NamespaceY = cast<NamespaceDecl>(Y);
2605 return NamespaceX->isInline() == NamespaceY->isInline();
2608 // Identical template names and kinds match if their template parameter lists
2609 // and patterns match.
2610 if (TemplateDecl *TemplateX = dyn_cast<TemplateDecl>(X)) {
2611 TemplateDecl *TemplateY = cast<TemplateDecl>(Y);
2612 return isSameEntity(TemplateX->getTemplatedDecl(),
2613 TemplateY->getTemplatedDecl()) &&
2614 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
2615 TemplateY->getTemplateParameters());
2618 // Fields with the same name and the same type match.
2619 if (FieldDecl *FDX = dyn_cast<FieldDecl>(X)) {
2620 FieldDecl *FDY = cast<FieldDecl>(Y);
2621 // FIXME: Also check the bitwidth is odr-equivalent, if any.
2622 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
2625 // Indirect fields with the same target field match.
2626 if (auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
2627 auto *IFDY = cast<IndirectFieldDecl>(Y);
2628 return IFDX->getAnonField()->getCanonicalDecl() ==
2629 IFDY->getAnonField()->getCanonicalDecl();
2632 // Enumerators with the same name match.
2633 if (isa<EnumConstantDecl>(X))
2634 // FIXME: Also check the value is odr-equivalent.
2637 // Using shadow declarations with the same target match.
2638 if (UsingShadowDecl *USX = dyn_cast<UsingShadowDecl>(X)) {
2639 UsingShadowDecl *USY = cast<UsingShadowDecl>(Y);
2640 return USX->getTargetDecl() == USY->getTargetDecl();
2643 // Using declarations with the same qualifier match. (We already know that
2644 // the name matches.)
2645 if (auto *UX = dyn_cast<UsingDecl>(X)) {
2646 auto *UY = cast<UsingDecl>(Y);
2647 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2648 UX->hasTypename() == UY->hasTypename() &&
2649 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2651 if (auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
2652 auto *UY = cast<UnresolvedUsingValueDecl>(Y);
2653 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2654 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2656 if (auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
2657 return isSameQualifier(
2659 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
2661 // Namespace alias definitions with the same target match.
2662 if (auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
2663 auto *NAY = cast<NamespaceAliasDecl>(Y);
2664 return NAX->getNamespace()->Equals(NAY->getNamespace());
2670 /// Find the context in which we should search for previous declarations when
2671 /// looking for declarations to merge.
2672 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
2674 if (NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC))
2675 return ND->getOriginalNamespace();
2677 if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) {
2678 // Try to dig out the definition.
2679 auto *DD = RD->DefinitionData.getNotUpdated();
2681 DD = RD->getCanonicalDecl()->DefinitionData.getNotUpdated();
2683 // If there's no definition yet, then DC's definition is added by an update
2684 // record, but we've not yet loaded that update record. In this case, we
2685 // commit to DC being the canonical definition now, and will fix this when
2686 // we load the update record.
2688 DD = new (Reader.Context) struct CXXRecordDecl::DefinitionData(RD);
2689 RD->IsCompleteDefinition = true;
2690 RD->DefinitionData = DD;
2691 RD->getCanonicalDecl()->DefinitionData = DD;
2693 // Track that we did this horrible thing so that we can fix it later.
2694 Reader.PendingFakeDefinitionData.insert(
2695 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
2698 return DD->Definition;
2701 if (EnumDecl *ED = dyn_cast<EnumDecl>(DC))
2702 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
2705 // We can see the TU here only if we have no Sema object. In that case,
2706 // there's no TU scope to look in, so using the DC alone is sufficient.
2707 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
2713 ASTDeclReader::FindExistingResult::~FindExistingResult() {
2714 // Record that we had a typedef name for linkage whether or not we merge
2715 // with that declaration.
2716 if (TypedefNameForLinkage) {
2717 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2718 Reader.ImportedTypedefNamesForLinkage.insert(
2719 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
2723 if (!AddResult || Existing)
2726 DeclarationName Name = New->getDeclName();
2727 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2728 if (needsAnonymousDeclarationNumber(New)) {
2729 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
2730 AnonymousDeclNumber, New);
2731 } else if (DC->isTranslationUnit() && Reader.SemaObj &&
2732 !Reader.getContext().getLangOpts().CPlusPlus) {
2733 if (Reader.SemaObj->IdResolver.tryAddTopLevelDecl(New, Name))
2734 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
2736 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
2737 // Add the declaration to its redeclaration context so later merging
2738 // lookups will find it.
2739 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
2743 /// Find the declaration that should be merged into, given the declaration found
2744 /// by name lookup. If we're merging an anonymous declaration within a typedef,
2745 /// we need a matching typedef, and we merge with the type inside it.
2746 static NamedDecl *getDeclForMerging(NamedDecl *Found,
2747 bool IsTypedefNameForLinkage) {
2748 if (!IsTypedefNameForLinkage)
2751 // If we found a typedef declaration that gives a name to some other
2752 // declaration, then we want that inner declaration. Declarations from
2753 // AST files are handled via ImportedTypedefNamesForLinkage.
2754 if (Found->isFromASTFile())
2757 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
2758 return TND->getAnonDeclWithTypedefName();
2763 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
2766 // If the lexical context has been merged, look into the now-canonical
2768 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
2771 // If we've seen this before, return the canonical declaration.
2772 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
2773 if (Index < Previous.size() && Previous[Index])
2774 return Previous[Index];
2776 // If this is the first time, but we have parsed a declaration of the context,
2777 // build the anonymous declaration list from the parsed declaration.
2778 if (!cast<Decl>(DC)->isFromASTFile()) {
2779 numberAnonymousDeclsWithin(DC, [&](NamedDecl *ND, unsigned Number) {
2780 if (Previous.size() == Number)
2781 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
2783 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
2787 return Index < Previous.size() ? Previous[Index] : nullptr;
2790 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
2791 DeclContext *DC, unsigned Index,
2793 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
2796 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
2797 if (Index >= Previous.size())
2798 Previous.resize(Index + 1);
2799 if (!Previous[Index])
2800 Previous[Index] = D;
2803 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
2804 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
2807 if (!Name && !needsAnonymousDeclarationNumber(D)) {
2808 // Don't bother trying to find unnamed declarations that are in
2809 // unmergeable contexts.
2810 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
2811 AnonymousDeclNumber, TypedefNameForLinkage);
2816 DeclContext *DC = D->getDeclContext()->getRedeclContext();
2817 if (TypedefNameForLinkage) {
2818 auto It = Reader.ImportedTypedefNamesForLinkage.find(
2819 std::make_pair(DC, TypedefNameForLinkage));
2820 if (It != Reader.ImportedTypedefNamesForLinkage.end())
2821 if (isSameEntity(It->second, D))
2822 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
2823 TypedefNameForLinkage);
2824 // Go on to check in other places in case an existing typedef name
2825 // was not imported.
2828 if (needsAnonymousDeclarationNumber(D)) {
2829 // This is an anonymous declaration that we may need to merge. Look it up
2830 // in its context by number.
2831 if (auto *Existing = getAnonymousDeclForMerging(
2832 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
2833 if (isSameEntity(Existing, D))
2834 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
2835 TypedefNameForLinkage);
2836 } else if (DC->isTranslationUnit() && Reader.SemaObj &&
2837 !Reader.getContext().getLangOpts().CPlusPlus) {
2838 IdentifierResolver &IdResolver = Reader.SemaObj->IdResolver;
2840 // Temporarily consider the identifier to be up-to-date. We don't want to
2841 // cause additional lookups here.
2842 class UpToDateIdentifierRAII {
2847 explicit UpToDateIdentifierRAII(IdentifierInfo *II)
2848 : II(II), WasOutToDate(false)
2851 WasOutToDate = II->isOutOfDate();
2853 II->setOutOfDate(false);
2857 ~UpToDateIdentifierRAII() {
2859 II->setOutOfDate(true);
2861 } UpToDate(Name.getAsIdentifierInfo());
2863 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
2864 IEnd = IdResolver.end();
2866 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
2867 if (isSameEntity(Existing, D))
2868 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
2869 TypedefNameForLinkage);
2871 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
2872 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
2873 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
2874 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
2875 if (isSameEntity(Existing, D))
2876 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
2877 TypedefNameForLinkage);
2880 // Not in a mergeable context.
2881 return FindExistingResult(Reader);
2884 // If this declaration is from a merged context, make a note that we need to
2885 // check that the canonical definition of that context contains the decl.
2887 // FIXME: We should do something similar if we merge two definitions of the
2888 // same template specialization into the same CXXRecordDecl.
2889 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
2890 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
2891 MergedDCIt->second == D->getDeclContext())
2892 Reader.PendingOdrMergeChecks.push_back(D);
2894 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
2895 AnonymousDeclNumber, TypedefNameForLinkage);
2898 template<typename DeclT>
2899 Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
2900 return D->RedeclLink.getLatestNotUpdated();
2902 Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
2903 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
2906 Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
2909 switch (D->getKind()) {
2910 #define ABSTRACT_DECL(TYPE)
2911 #define DECL(TYPE, BASE) \
2913 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
2914 #include "clang/AST/DeclNodes.inc"
2916 llvm_unreachable("unknown decl kind");
2919 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
2920 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
2923 template<typename DeclT>
2924 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
2925 Redeclarable<DeclT> *D,
2926 Decl *Previous, Decl *Canon) {
2927 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
2928 D->First = cast<DeclT>(Previous)->First;
2933 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
2934 Redeclarable<FunctionDecl> *D,
2935 Decl *Previous, Decl *Canon) {
2936 FunctionDecl *FD = static_cast<FunctionDecl*>(D);
2937 FunctionDecl *PrevFD = cast<FunctionDecl>(Previous);
2939 FD->RedeclLink.setPrevious(PrevFD);
2940 FD->First = PrevFD->First;
2942 // If the previous declaration is an inline function declaration, then this
2943 // declaration is too.
2944 if (PrevFD->IsInline != FD->IsInline) {
2945 // FIXME: [dcl.fct.spec]p4:
2946 // If a function with external linkage is declared inline in one
2947 // translation unit, it shall be declared inline in all translation
2948 // units in which it appears.
2950 // Be careful of this case:
2953 // template<typename T> struct X { void f(); };
2954 // template<typename T> inline void X<T>::f() {}
2956 // module B instantiates the declaration of X<int>::f
2957 // module C instantiates the definition of X<int>::f
2959 // If module B and C are merged, we do not have a violation of this rule.
2960 FD->IsInline = true;
2963 // If we need to propagate an exception specification along the redecl
2964 // chain, make a note of that so that we can do so later.
2965 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
2966 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
2967 if (FPT && PrevFPT) {
2968 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
2969 bool WasUnresolved =
2970 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
2971 if (IsUnresolved != WasUnresolved)
2972 Reader.PendingExceptionSpecUpdates.insert(
2973 std::make_pair(Canon, IsUnresolved ? PrevFD : FD));
2976 } // end namespace clang
2978 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
2979 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
2982 /// Inherit the default template argument from \p From to \p To. Returns
2983 /// \c false if there is no default template for \p From.
2984 template <typename ParmDecl>
2985 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
2987 auto *To = cast<ParmDecl>(ToD);
2988 if (!From->hasDefaultArgument())
2990 To->setInheritedDefaultArgument(Context, From);
2994 static void inheritDefaultTemplateArguments(ASTContext &Context,
2997 auto *FromTP = From->getTemplateParameters();
2998 auto *ToTP = To->getTemplateParameters();
2999 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3001 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3002 NamedDecl *FromParam = FromTP->getParam(N - I - 1);
3003 NamedDecl *ToParam = ToTP->getParam(N - I - 1);
3005 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam)) {
3006 if (!inheritDefaultTemplateArgument(Context, FTTP, ToParam))
3008 } else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam)) {
3009 if (!inheritDefaultTemplateArgument(Context, FNTTP, ToParam))
3012 if (!inheritDefaultTemplateArgument(
3013 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam))
3019 void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3020 Decl *Previous, Decl *Canon) {
3021 assert(D && Previous);
3023 switch (D->getKind()) {
3024 #define ABSTRACT_DECL(TYPE)
3025 #define DECL(TYPE, BASE) \
3027 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3029 #include "clang/AST/DeclNodes.inc"
3032 // If the declaration was visible in one module, a redeclaration of it in
3033 // another module remains visible even if it wouldn't be visible by itself.
3035 // FIXME: In this case, the declaration should only be visible if a module
3036 // that makes it visible has been imported.
3037 D->IdentifierNamespace |=
3038 Previous->IdentifierNamespace &
3039 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3041 // If the previous declaration is marked as used, then this declaration should
3046 // If the declaration declares a template, it may inherit default arguments
3047 // from the previous declaration.
3048 if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D))
3049 inheritDefaultTemplateArguments(Reader.getContext(),
3050 cast<TemplateDecl>(Previous), TD);
3053 template<typename DeclT>
3054 void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3055 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3057 void ASTDeclReader::attachLatestDeclImpl(...) {
3058 llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3061 void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3062 assert(D && Latest);
3064 switch (D->getKind()) {
3065 #define ABSTRACT_DECL(TYPE)
3066 #define DECL(TYPE, BASE) \
3068 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3070 #include "clang/AST/DeclNodes.inc"
3074 template<typename DeclT>
3075 void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3076 D->RedeclLink.markIncomplete();
3078 void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3079 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3082 void ASTReader::markIncompleteDeclChain(Decl *D) {
3083 switch (D->getKind()) {
3084 #define ABSTRACT_DECL(TYPE)
3085 #define DECL(TYPE, BASE) \
3087 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3089 #include "clang/AST/DeclNodes.inc"
3093 /// \brief Read the declaration at the given offset from the AST file.
3094 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3095 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3096 unsigned RawLocation = 0;
3097 RecordLocation Loc = DeclCursorForID(ID, RawLocation);
3098 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3099 // Keep track of where we are in the stream, then jump back there
3100 // after reading this declaration.
3101 SavedStreamPosition SavedPosition(DeclsCursor);
3103 ReadingKindTracker ReadingKind(Read_Decl, *this);
3105 // Note that we are loading a declaration record.
3106 Deserializing ADecl(this);
3108 DeclsCursor.JumpToBit(Loc.Offset);
3110 unsigned Code = DeclsCursor.ReadCode();
3112 ASTDeclReader Reader(*this, *Loc.F, ID, RawLocation, Record,Idx);
3115 switch ((DeclCode)DeclsCursor.readRecord(Code, Record)) {
3116 case DECL_CONTEXT_LEXICAL:
3117 case DECL_CONTEXT_VISIBLE:
3118 llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3120 D = TypedefDecl::CreateDeserialized(Context, ID);
3122 case DECL_TYPEALIAS:
3123 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3126 D = EnumDecl::CreateDeserialized(Context, ID);
3129 D = RecordDecl::CreateDeserialized(Context, ID);
3131 case DECL_ENUM_CONSTANT:
3132 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3135 D = FunctionDecl::CreateDeserialized(Context, ID);
3137 case DECL_LINKAGE_SPEC:
3138 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3141 D = LabelDecl::CreateDeserialized(Context, ID);
3143 case DECL_NAMESPACE:
3144 D = NamespaceDecl::CreateDeserialized(Context, ID);
3146 case DECL_NAMESPACE_ALIAS:
3147 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3150 D = UsingDecl::CreateDeserialized(Context, ID);
3152 case DECL_USING_SHADOW:
3153 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3155 case DECL_USING_DIRECTIVE:
3156 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3158 case DECL_UNRESOLVED_USING_VALUE:
3159 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3161 case DECL_UNRESOLVED_USING_TYPENAME:
3162 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3164 case DECL_CXX_RECORD:
3165 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3167 case DECL_CXX_METHOD:
3168 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3170 case DECL_CXX_CONSTRUCTOR:
3171 D = CXXConstructorDecl::CreateDeserialized(Context, ID);
3173 case DECL_CXX_DESTRUCTOR:
3174 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3176 case DECL_CXX_CONVERSION:
3177 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3179 case DECL_ACCESS_SPEC:
3180 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3183 D = FriendDecl::CreateDeserialized(Context, ID, Record[Idx++]);
3185 case DECL_FRIEND_TEMPLATE:
3186 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3188 case DECL_CLASS_TEMPLATE:
3189 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3191 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3192 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3194 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3195 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3197 case DECL_VAR_TEMPLATE:
3198 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3200 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3201 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3203 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3204 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3206 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3207 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3209 case DECL_FUNCTION_TEMPLATE:
3210 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3212 case DECL_TEMPLATE_TYPE_PARM:
3213 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3215 case DECL_NON_TYPE_TEMPLATE_PARM:
3216 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3218 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3219 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID, Record[Idx++]);
3221 case DECL_TEMPLATE_TEMPLATE_PARM:
3222 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3224 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3225 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3228 case DECL_TYPE_ALIAS_TEMPLATE:
3229 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3231 case DECL_STATIC_ASSERT:
3232 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3234 case DECL_OBJC_METHOD:
3235 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3237 case DECL_OBJC_INTERFACE:
3238 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3240 case DECL_OBJC_IVAR:
3241 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3243 case DECL_OBJC_PROTOCOL:
3244 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3246 case DECL_OBJC_AT_DEFS_FIELD:
3247 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3249 case DECL_OBJC_CATEGORY:
3250 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3252 case DECL_OBJC_CATEGORY_IMPL:
3253 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3255 case DECL_OBJC_IMPLEMENTATION:
3256 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3258 case DECL_OBJC_COMPATIBLE_ALIAS:
3259 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3261 case DECL_OBJC_PROPERTY:
3262 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3264 case DECL_OBJC_PROPERTY_IMPL:
3265 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3268 D = FieldDecl::CreateDeserialized(Context, ID);
3270 case DECL_INDIRECTFIELD:
3271 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3274 D = VarDecl::CreateDeserialized(Context, ID);
3276 case DECL_IMPLICIT_PARAM:
3277 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3280 D = ParmVarDecl::CreateDeserialized(Context, ID);
3282 case DECL_FILE_SCOPE_ASM:
3283 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3286 D = BlockDecl::CreateDeserialized(Context, ID);
3288 case DECL_MS_PROPERTY:
3289 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3292 D = CapturedDecl::CreateDeserialized(Context, ID, Record[Idx++]);
3294 case DECL_CXX_BASE_SPECIFIERS:
3295 Error("attempt to read a C++ base-specifier record as a declaration");
3297 case DECL_CXX_CTOR_INITIALIZERS:
3298 Error("attempt to read a C++ ctor initializer record as a declaration");
3301 // Note: last entry of the ImportDecl record is the number of stored source
3303 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3305 case DECL_OMP_THREADPRIVATE:
3306 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record[Idx++]);
3309 D = EmptyDecl::CreateDeserialized(Context, ID);
3311 case DECL_OBJC_TYPE_PARAM:
3312 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3316 assert(D && "Unknown declaration reading AST file");
3317 LoadedDecl(Index, D);
3318 // Set the DeclContext before doing any deserialization, to make sure internal
3319 // calls to Decl::getASTContext() by Decl's methods will find the
3320 // TranslationUnitDecl without crashing.
3321 D->setDeclContext(Context.getTranslationUnitDecl());
3324 // If this declaration is also a declaration context, get the
3325 // offsets for its tables of lexical and visible declarations.
3326 if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
3327 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3328 if (Offsets.first &&
3329 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3331 if (Offsets.second &&
3332 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3335 assert(Idx == Record.size());
3337 // Load any relevant update records.
3338 PendingUpdateRecords.push_back(std::make_pair(ID, D));
3340 // Load the categories after recursive loading is finished.
3341 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(D))
3342 if (Class->isThisDeclarationADefinition())
3343 loadObjCCategories(ID, Class);
3345 // If we have deserialized a declaration that has a definition the
3346 // AST consumer might need to know about, queue it.
3347 // We don't pass it to the consumer immediately because we may be in recursive
3348 // loading, and some declarations may still be initializing.
3349 if (isConsumerInterestedIn(D, Reader.hasPendingBody()))
3350 InterestingDecls.push_back(D);
3355 void ASTReader::loadDeclUpdateRecords(serialization::DeclID ID, Decl *D) {
3356 // Load the pending visible updates for this decl context, if it has any.
3357 auto I = PendingVisibleUpdates.find(ID);
3358 if (I != PendingVisibleUpdates.end()) {
3359 auto VisibleUpdates = std::move(I->second);
3360 PendingVisibleUpdates.erase(I);
3362 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
3363 for (const PendingVisibleUpdate &Update : VisibleUpdates)
3364 Lookups[DC].Table.add(
3365 Update.Mod, Update.Data,
3366 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
3367 DC->setHasExternalVisibleStorage(true);
3370 // The declaration may have been modified by files later in the chain.
3371 // If this is the case, read the record containing the updates from each file
3372 // and pass it to ASTDeclReader to make the modifications.
3373 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3374 if (UpdI != DeclUpdateOffsets.end()) {
3375 auto UpdateOffsets = std::move(UpdI->second);
3376 DeclUpdateOffsets.erase(UpdI);
3378 bool WasInteresting = isConsumerInterestedIn(D, false);
3379 for (auto &FileAndOffset : UpdateOffsets) {
3380 ModuleFile *F = FileAndOffset.first;
3381 uint64_t Offset = FileAndOffset.second;
3382 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3383 SavedStreamPosition SavedPosition(Cursor);
3384 Cursor.JumpToBit(Offset);
3386 unsigned Code = Cursor.ReadCode();
3387 unsigned RecCode = Cursor.readRecord(Code, Record);
3389 assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3392 ASTDeclReader Reader(*this, *F, ID, 0, Record, Idx);
3393 Reader.UpdateDecl(D, *F, Record);
3395 // We might have made this declaration interesting. If so, remember that
3396 // we need to hand it off to the consumer.
3397 if (!WasInteresting &&
3398 isConsumerInterestedIn(D, Reader.hasPendingBody())) {
3399 InterestingDecls.push_back(D);
3400 WasInteresting = true;
3406 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
3407 // Attach FirstLocal to the end of the decl chain.
3408 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
3409 if (FirstLocal != CanonDecl) {
3410 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
3411 ASTDeclReader::attachPreviousDecl(
3412 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
3417 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
3421 // Load the list of other redeclarations from this module file.
3422 ModuleFile *M = getOwningModuleFile(FirstLocal);
3423 assert(M && "imported decl from no module file");
3425 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
3426 SavedStreamPosition SavedPosition(Cursor);
3427 Cursor.JumpToBit(LocalOffset);
3430 unsigned Code = Cursor.ReadCode();
3431 unsigned RecCode = Cursor.readRecord(Code, Record);
3433 assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
3435 // FIXME: We have several different dispatches on decl kind here; maybe
3436 // we should instead generate one loop per kind and dispatch up-front?
3437 Decl *MostRecent = FirstLocal;
3438 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
3439 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
3440 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
3443 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
3447 /// \brief Given an ObjC interface, goes through the modules and links to the
3448 /// interface all the categories for it.
3449 class ObjCCategoriesVisitor {
3451 serialization::GlobalDeclID InterfaceID;
3452 ObjCInterfaceDecl *Interface;
3453 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
3454 unsigned PreviousGeneration;
3455 ObjCCategoryDecl *Tail;
3456 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
3458 void add(ObjCCategoryDecl *Cat) {
3459 // Only process each category once.
3460 if (!Deserialized.erase(Cat))
3463 // Check for duplicate categories.
3464 if (Cat->getDeclName()) {
3465 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
3467 Reader.getOwningModuleFile(Existing)
3468 != Reader.getOwningModuleFile(Cat)) {
3469 // FIXME: We should not warn for duplicates in diamond:
3477 // If there are duplicates in ML/MR, there will be warning when
3478 // creating MB *and* when importing MB. We should not warn when
3480 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
3481 << Interface->getDeclName() << Cat->getDeclName();
3482 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
3483 } else if (!Existing) {
3484 // Record this category.
3489 // Add this category to the end of the chain.
3491 ASTDeclReader::setNextObjCCategory(Tail, Cat);
3493 Interface->setCategoryListRaw(Cat);
3498 ObjCCategoriesVisitor(ASTReader &Reader,
3499 serialization::GlobalDeclID InterfaceID,
3500 ObjCInterfaceDecl *Interface,
3501 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
3502 unsigned PreviousGeneration)
3503 : Reader(Reader), InterfaceID(InterfaceID), Interface(Interface),
3504 Deserialized(Deserialized), PreviousGeneration(PreviousGeneration),
3507 // Populate the name -> category map with the set of known categories.
3508 for (auto *Cat : Interface->known_categories()) {
3509 if (Cat->getDeclName())
3510 NameCategoryMap[Cat->getDeclName()] = Cat;
3512 // Keep track of the tail of the category list.
3517 bool operator()(ModuleFile &M) {
3518 // If we've loaded all of the category information we care about from
3519 // this module file, we're done.
3520 if (M.Generation <= PreviousGeneration)
3523 // Map global ID of the definition down to the local ID used in this
3524 // module file. If there is no such mapping, we'll find nothing here
3525 // (or in any module it imports).
3526 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
3530 // Perform a binary search to find the local redeclarations for this
3531 // declaration (if any).
3532 const ObjCCategoriesInfo Compare = { LocalID, 0 };
3533 const ObjCCategoriesInfo *Result
3534 = std::lower_bound(M.ObjCCategoriesMap,
3535 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
3537 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
3538 Result->DefinitionID != LocalID) {
3539 // We didn't find anything. If the class definition is in this module
3540 // file, then the module files it depends on cannot have any categories,
3541 // so suppress further lookup.
3542 return Reader.isDeclIDFromModule(InterfaceID, M);
3545 // We found something. Dig out all of the categories.
3546 unsigned Offset = Result->Offset;
3547 unsigned N = M.ObjCCategories[Offset];
3548 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
3549 for (unsigned I = 0; I != N; ++I)
3550 add(cast_or_null<ObjCCategoryDecl>(
3551 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
3555 } // end anonymous namespace
3557 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
3558 ObjCInterfaceDecl *D,
3559 unsigned PreviousGeneration) {
3560 ObjCCategoriesVisitor Visitor(*this, ID, D, CategoriesDeserialized,
3561 PreviousGeneration);
3562 ModuleMgr.visit(Visitor);
3565 template<typename DeclT, typename Fn>
3566 static void forAllLaterRedecls(DeclT *D, Fn F) {
3569 // Check whether we've already merged D into its redeclaration chain.
3570 // MostRecent may or may not be nullptr if D has not been merged. If
3571 // not, walk the merged redecl chain and see if it's there.
3572 auto *MostRecent = D->getMostRecentDecl();
3574 for (auto *Redecl = MostRecent; Redecl && !Found;
3575 Redecl = Redecl->getPreviousDecl())
3576 Found = (Redecl == D);
3578 // If this declaration is merged, apply the functor to all later decls.
3580 for (auto *Redecl = MostRecent; Redecl != D;
3581 Redecl = Redecl->getPreviousDecl())
3586 void ASTDeclReader::UpdateDecl(Decl *D, ModuleFile &ModuleFile,
3587 const RecordData &Record) {
3588 while (Idx < Record.size()) {
3589 switch ((DeclUpdateKind)Record[Idx++]) {
3590 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
3591 auto *RD = cast<CXXRecordDecl>(D);
3592 // FIXME: If we also have an update record for instantiating the
3593 // definition of D, we need that to happen before we get here.
3594 Decl *MD = Reader.ReadDecl(ModuleFile, Record, Idx);
3595 assert(MD && "couldn't read decl from update record");
3596 // FIXME: We should call addHiddenDecl instead, to add the member
3597 // to its DeclContext.
3598 RD->addedMember(MD);
3602 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
3603 // It will be added to the template's specializations set when loaded.
3604 (void)Reader.ReadDecl(ModuleFile, Record, Idx);
3607 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
3609 = Reader.ReadDeclAs<NamespaceDecl>(ModuleFile, Record, Idx);
3611 // Each module has its own anonymous namespace, which is disjoint from
3612 // any other module's anonymous namespaces, so don't attach the anonymous
3613 // namespace at all.
3614 if (ModuleFile.Kind != MK_ImplicitModule &&
3615 ModuleFile.Kind != MK_ExplicitModule) {
3616 if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(D))
3617 TU->setAnonymousNamespace(Anon);
3619 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
3624 case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER:
3625 cast<VarDecl>(D)->getMemberSpecializationInfo()->setPointOfInstantiation(
3626 Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3629 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
3630 auto Param = cast<ParmVarDecl>(D);
3632 // We have to read the default argument regardless of whether we use it
3633 // so that hypothetical further update records aren't messed up.
3634 // TODO: Add a function to skip over the next expr record.
3635 auto DefaultArg = Reader.ReadExpr(F);
3637 // Only apply the update if the parameter still has an uninstantiated
3638 // default argument.
3639 if (Param->hasUninstantiatedDefaultArg())
3640 Param->setDefaultArg(DefaultArg);
3644 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
3645 FunctionDecl *FD = cast<FunctionDecl>(D);
3646 if (Reader.PendingBodies[FD]) {
3647 // FIXME: Maybe check for ODR violations.
3648 // It's safe to stop now because this update record is always last.
3652 if (Record[Idx++]) {
3653 // Maintain AST consistency: any later redeclarations of this function
3654 // are inline if this one is. (We might have merged another declaration
3656 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
3657 FD->setImplicitlyInline();
3660 FD->setInnerLocStart(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3661 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
3662 CD->NumCtorInitializers = Record[Idx++];
3663 if (CD->NumCtorInitializers)
3664 CD->CtorInitializers =
3665 Reader.ReadCXXCtorInitializersRef(F, Record, Idx);
3667 // Store the offset of the body so we can lazily load it later.
3668 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
3669 HasPendingBody = true;
3670 assert(Idx == Record.size() && "lazy body must be last");
3674 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
3675 auto *RD = cast<CXXRecordDecl>(D);
3676 auto *OldDD = RD->DefinitionData.getNotUpdated();
3677 bool HadRealDefinition =
3678 OldDD && (OldDD->Definition != RD ||
3679 !Reader.PendingFakeDefinitionData.count(OldDD));
3680 ReadCXXRecordDefinition(RD, /*Update*/true);
3682 // Visible update is handled separately.
3683 uint64_t LexicalOffset = Record[Idx++];
3684 if (!HadRealDefinition && LexicalOffset) {
3685 Reader.ReadLexicalDeclContextStorage(ModuleFile, ModuleFile.DeclsCursor,
3687 Reader.PendingFakeDefinitionData.erase(OldDD);
3690 auto TSK = (TemplateSpecializationKind)Record[Idx++];
3691 SourceLocation POI = Reader.ReadSourceLocation(ModuleFile, Record, Idx);
3692 if (MemberSpecializationInfo *MSInfo =
3693 RD->getMemberSpecializationInfo()) {
3694 MSInfo->setTemplateSpecializationKind(TSK);
3695 MSInfo->setPointOfInstantiation(POI);
3697 ClassTemplateSpecializationDecl *Spec =
3698 cast<ClassTemplateSpecializationDecl>(RD);
3699 Spec->setTemplateSpecializationKind(TSK);
3700 Spec->setPointOfInstantiation(POI);
3702 if (Record[Idx++]) {
3704 ReadDeclAs<ClassTemplatePartialSpecializationDecl>(Record, Idx);
3705 SmallVector<TemplateArgument, 8> TemplArgs;
3706 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
3707 auto *TemplArgList = TemplateArgumentList::CreateCopy(
3708 Reader.getContext(), TemplArgs.data(), TemplArgs.size());
3710 // FIXME: If we already have a partial specialization set,
3711 // check that it matches.
3712 if (!Spec->getSpecializedTemplateOrPartial()
3713 .is<ClassTemplatePartialSpecializationDecl *>())
3714 Spec->setInstantiationOf(PartialSpec, TemplArgList);
3718 RD->setTagKind((TagTypeKind)Record[Idx++]);
3719 RD->setLocation(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3720 RD->setLocStart(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3721 RD->setRBraceLoc(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3723 if (Record[Idx++]) {
3725 Reader.ReadAttributes(F, Attrs, Record, Idx);
3726 D->setAttrsImpl(Attrs, Reader.getContext());
3731 case UPD_CXX_RESOLVED_DTOR_DELETE: {
3732 // Set the 'operator delete' directly to avoid emitting another update
3734 auto *Del = Reader.ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
3735 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
3736 // FIXME: Check consistency if we have an old and new operator delete.
3737 if (!First->OperatorDelete)
3738 First->OperatorDelete = Del;
3742 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
3743 FunctionProtoType::ExceptionSpecInfo ESI;
3744 SmallVector<QualType, 8> ExceptionStorage;
3745 Reader.readExceptionSpec(ModuleFile, ExceptionStorage, ESI, Record, Idx);
3747 // Update this declaration's exception specification, if needed.
3748 auto *FD = cast<FunctionDecl>(D);
3749 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
3750 // FIXME: If the exception specification is already present, check that it
3752 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
3753 FD->setType(Reader.Context.getFunctionType(
3754 FPT->getReturnType(), FPT->getParamTypes(),
3755 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
3757 // When we get to the end of deserializing, see if there are other decls
3758 // that we need to propagate this exception specification onto.
3759 Reader.PendingExceptionSpecUpdates.insert(
3760 std::make_pair(FD->getCanonicalDecl(), FD));
3765 case UPD_CXX_DEDUCED_RETURN_TYPE: {
3766 // FIXME: Also do this when merging redecls.
3767 QualType DeducedResultType = Reader.readType(ModuleFile, Record, Idx);
3768 for (auto *Redecl : merged_redecls(D)) {
3769 // FIXME: If the return type is already deduced, check that it matches.
3770 FunctionDecl *FD = cast<FunctionDecl>(Redecl);
3771 Reader.Context.adjustDeducedFunctionResultType(FD, DeducedResultType);
3776 case UPD_DECL_MARKED_USED: {
3777 // FIXME: This doesn't send the right notifications if there are
3778 // ASTMutationListeners other than an ASTWriter.
3780 // Maintain AST consistency: any later redeclarations are used too.
3781 forAllLaterRedecls(D, [](Decl *D) { D->Used = true; });
3785 case UPD_MANGLING_NUMBER:
3786 Reader.Context.setManglingNumber(cast<NamedDecl>(D), Record[Idx++]);
3789 case UPD_STATIC_LOCAL_NUMBER:
3790 Reader.Context.setStaticLocalNumber(cast<VarDecl>(D), Record[Idx++]);
3793 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
3794 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
3795 Reader.Context, ReadSourceRange(Record, Idx)));
3798 case UPD_DECL_EXPORTED: {
3799 unsigned SubmoduleID = readSubmoduleID(Record, Idx);
3800 auto *Exported = cast<NamedDecl>(D);
3801 if (auto *TD = dyn_cast<TagDecl>(Exported))
3802 Exported = TD->getDefinition();
3803 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
3804 if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
3805 // FIXME: This doesn't send the right notifications if there are
3806 // ASTMutationListeners other than an ASTWriter.
3807 Reader.getContext().mergeDefinitionIntoModule(
3808 cast<NamedDecl>(Exported), Owner,
3809 /*NotifyListeners*/ false);
3810 Reader.PendingMergedDefinitionsToDeduplicate.insert(
3811 cast<NamedDecl>(Exported));
3812 } else if (Owner && Owner->NameVisibility != Module::AllVisible) {
3813 // If Owner is made visible at some later point, make this declaration
3815 Reader.HiddenNamesMap[Owner].push_back(Exported);
3817 // The declaration is now visible.
3818 Exported->Hidden = false;
3823 case UPD_ADDED_ATTR_TO_RECORD:
3825 Reader.ReadAttributes(F, Attrs, Record, Idx);
3826 assert(Attrs.size() == 1);
3827 D->addAttr(Attrs[0]);