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"
29 using namespace clang;
30 using namespace clang::serialization;
32 //===----------------------------------------------------------------------===//
33 // Declaration deserialization
34 //===----------------------------------------------------------------------===//
37 class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
40 const DeclID ThisDeclID;
41 const unsigned RawLocation;
42 typedef ASTReader::RecordData RecordData;
43 const RecordData &Record;
45 TypeID TypeIDForTypeDecl;
46 unsigned AnonymousDeclNumber;
47 GlobalDeclID NamedDeclForTagDecl;
48 IdentifierInfo *TypedefNameForLinkage;
52 uint64_t GetCurrentCursorOffset();
54 SourceLocation ReadSourceLocation(const RecordData &R, unsigned &I) {
55 return Reader.ReadSourceLocation(F, R, I);
58 SourceRange ReadSourceRange(const RecordData &R, unsigned &I) {
59 return Reader.ReadSourceRange(F, R, I);
62 TypeSourceInfo *GetTypeSourceInfo(const RecordData &R, unsigned &I) {
63 return Reader.GetTypeSourceInfo(F, R, I);
66 serialization::DeclID ReadDeclID(const RecordData &R, unsigned &I) {
67 return Reader.ReadDeclID(F, R, I);
70 Decl *ReadDecl(const RecordData &R, unsigned &I) {
71 return Reader.ReadDecl(F, R, I);
75 T *ReadDeclAs(const RecordData &R, unsigned &I) {
76 return Reader.ReadDeclAs<T>(F, R, I);
79 void ReadQualifierInfo(QualifierInfo &Info,
80 const RecordData &R, unsigned &I) {
81 Reader.ReadQualifierInfo(F, Info, R, I);
84 void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name,
85 const RecordData &R, unsigned &I) {
86 Reader.ReadDeclarationNameLoc(F, DNLoc, Name, R, I);
89 void ReadDeclarationNameInfo(DeclarationNameInfo &NameInfo,
90 const RecordData &R, unsigned &I) {
91 Reader.ReadDeclarationNameInfo(F, NameInfo, R, I);
94 serialization::SubmoduleID readSubmoduleID(const RecordData &R,
99 return Reader.getGlobalSubmoduleID(F, R[I++]);
102 Module *readModule(const RecordData &R, unsigned &I) {
103 return Reader.getSubmodule(readSubmoduleID(R, I));
106 void ReadCXXRecordDefinition(CXXRecordDecl *D);
107 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
108 const RecordData &R, unsigned &I);
109 void MergeDefinitionData(CXXRecordDecl *D,
110 struct CXXRecordDecl::DefinitionData &NewDD);
112 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
115 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
116 unsigned Index, NamedDecl *D);
118 /// \brief RAII class used to capture the first ID within a redeclaration
119 /// chain and to introduce it into the list of pending redeclaration chains
122 /// The caller can choose not to introduce this ID into the list of pending
123 /// redeclaration chains by calling \c suppress().
124 class RedeclarableResult {
126 GlobalDeclID FirstID;
130 void operator=(RedeclarableResult &) LLVM_DELETED_FUNCTION;
133 RedeclarableResult(ASTReader &Reader, GlobalDeclID FirstID,
135 : Reader(Reader), FirstID(FirstID), Owning(true), DeclKind(DeclKind) { }
137 RedeclarableResult(const RedeclarableResult &Other)
138 : Reader(Other.Reader), FirstID(Other.FirstID), Owning(Other.Owning) ,
139 DeclKind(Other.DeclKind)
141 Other.Owning = false;
144 ~RedeclarableResult() {
145 if (FirstID && Owning && isRedeclarableDeclKind(DeclKind) &&
146 Reader.PendingDeclChainsKnown.insert(FirstID).second)
147 Reader.PendingDeclChains.push_back(FirstID);
150 /// \brief Retrieve the first ID.
151 GlobalDeclID getFirstID() const { return FirstID; }
153 /// \brief Do not introduce this declaration ID into the set of pending
154 /// declaration chains.
160 /// \brief Class used to capture the result of searching for an existing
161 /// declaration of a specific kind and name, along with the ability
162 /// to update the place where this result was found (the declaration
163 /// chain hanging off an identifier or the DeclContext we searched in)
165 class FindExistingResult {
169 mutable bool AddResult;
171 unsigned AnonymousDeclNumber;
172 IdentifierInfo *TypedefNameForLinkage;
174 void operator=(FindExistingResult&) LLVM_DELETED_FUNCTION;
177 FindExistingResult(ASTReader &Reader)
178 : Reader(Reader), New(nullptr), Existing(nullptr), AddResult(false),
179 AnonymousDeclNumber(0), TypedefNameForLinkage(0) {}
181 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
182 unsigned AnonymousDeclNumber,
183 IdentifierInfo *TypedefNameForLinkage)
184 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
185 AnonymousDeclNumber(AnonymousDeclNumber),
186 TypedefNameForLinkage(TypedefNameForLinkage) {}
188 FindExistingResult(const FindExistingResult &Other)
189 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
190 AddResult(Other.AddResult),
191 AnonymousDeclNumber(Other.AnonymousDeclNumber),
192 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
193 Other.AddResult = false;
196 ~FindExistingResult();
198 /// \brief Suppress the addition of this result into the known set of
200 void suppress() { AddResult = false; }
202 operator NamedDecl*() const { return Existing; }
205 operator T*() const { return dyn_cast_or_null<T>(Existing); }
208 FindExistingResult findExisting(NamedDecl *D);
211 ASTDeclReader(ASTReader &Reader, ModuleFile &F, DeclID thisDeclID,
212 unsigned RawLocation, const RecordData &Record, unsigned &Idx)
213 : Reader(Reader), F(F), ThisDeclID(thisDeclID),
214 RawLocation(RawLocation), Record(Record), Idx(Idx),
215 TypeIDForTypeDecl(0), NamedDeclForTagDecl(0),
216 TypedefNameForLinkage(nullptr), HasPendingBody(false) {}
218 template <typename DeclT>
219 static void attachPreviousDeclImpl(ASTReader &Reader,
220 Redeclarable<DeclT> *D, Decl *Previous);
221 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
222 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous);
224 template <typename DeclT>
225 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
226 static void attachLatestDeclImpl(...);
227 static void attachLatestDecl(Decl *D, Decl *latest);
229 template <typename DeclT>
230 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
231 static void markIncompleteDeclChainImpl(...);
233 /// \brief Determine whether this declaration has a pending body.
234 bool hasPendingBody() const { return HasPendingBody; }
238 void UpdateDecl(Decl *D, ModuleFile &ModuleFile,
239 const RecordData &Record);
241 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
242 ObjCCategoryDecl *Next) {
243 Cat->NextClassCategory = Next;
246 void VisitDecl(Decl *D);
247 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
248 void VisitNamedDecl(NamedDecl *ND);
249 void VisitLabelDecl(LabelDecl *LD);
250 void VisitNamespaceDecl(NamespaceDecl *D);
251 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
252 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
253 void VisitTypeDecl(TypeDecl *TD);
254 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
255 void VisitTypedefDecl(TypedefDecl *TD);
256 void VisitTypeAliasDecl(TypeAliasDecl *TD);
257 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
258 RedeclarableResult VisitTagDecl(TagDecl *TD);
259 void VisitEnumDecl(EnumDecl *ED);
260 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
261 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
262 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
263 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
264 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
265 ClassTemplateSpecializationDecl *D);
266 void VisitClassTemplateSpecializationDecl(
267 ClassTemplateSpecializationDecl *D) {
268 VisitClassTemplateSpecializationDeclImpl(D);
270 void VisitClassTemplatePartialSpecializationDecl(
271 ClassTemplatePartialSpecializationDecl *D);
272 void VisitClassScopeFunctionSpecializationDecl(
273 ClassScopeFunctionSpecializationDecl *D);
275 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
276 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
277 VisitVarTemplateSpecializationDeclImpl(D);
279 void VisitVarTemplatePartialSpecializationDecl(
280 VarTemplatePartialSpecializationDecl *D);
281 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
282 void VisitValueDecl(ValueDecl *VD);
283 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
284 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
285 void VisitDeclaratorDecl(DeclaratorDecl *DD);
286 void VisitFunctionDecl(FunctionDecl *FD);
287 void VisitCXXMethodDecl(CXXMethodDecl *D);
288 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
289 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
290 void VisitCXXConversionDecl(CXXConversionDecl *D);
291 void VisitFieldDecl(FieldDecl *FD);
292 void VisitMSPropertyDecl(MSPropertyDecl *FD);
293 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
294 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
295 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
296 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
297 void VisitParmVarDecl(ParmVarDecl *PD);
298 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
299 DeclID VisitTemplateDecl(TemplateDecl *D);
300 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
301 void VisitClassTemplateDecl(ClassTemplateDecl *D);
302 void VisitVarTemplateDecl(VarTemplateDecl *D);
303 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
304 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
305 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
306 void VisitUsingDecl(UsingDecl *D);
307 void VisitUsingShadowDecl(UsingShadowDecl *D);
308 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
309 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
310 void VisitImportDecl(ImportDecl *D);
311 void VisitAccessSpecDecl(AccessSpecDecl *D);
312 void VisitFriendDecl(FriendDecl *D);
313 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
314 void VisitStaticAssertDecl(StaticAssertDecl *D);
315 void VisitBlockDecl(BlockDecl *BD);
316 void VisitCapturedDecl(CapturedDecl *CD);
317 void VisitEmptyDecl(EmptyDecl *D);
319 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
322 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
325 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
326 DeclID TemplatePatternID = 0);
329 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
330 RedeclarableResult &Redecl,
331 DeclID TemplatePatternID = 0);
334 void mergeMergeable(Mergeable<T> *D);
336 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
337 RedeclarableTemplateDecl *Existing,
340 // FIXME: Reorder according to DeclNodes.td?
341 void VisitObjCMethodDecl(ObjCMethodDecl *D);
342 void VisitObjCContainerDecl(ObjCContainerDecl *D);
343 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
344 void VisitObjCIvarDecl(ObjCIvarDecl *D);
345 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
346 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
347 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
348 void VisitObjCImplDecl(ObjCImplDecl *D);
349 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
350 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
351 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
352 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
353 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
354 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
358 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
359 return F.DeclsCursor.GetCurrentBitNo() + F.GlobalBitOffset;
362 void ASTDeclReader::Visit(Decl *D) {
363 DeclVisitor<ASTDeclReader, void>::Visit(D);
365 if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) {
367 DeclaratorDecl::ExtInfo *Info =
368 DD->DeclInfo.get<DeclaratorDecl::ExtInfo *>();
370 GetTypeSourceInfo(Record, Idx);
373 DD->DeclInfo = GetTypeSourceInfo(Record, Idx);
377 if (TypeDecl *TD = dyn_cast<TypeDecl>(D)) {
378 // We have a fully initialized TypeDecl. Read its type now.
379 TD->setTypeForDecl(Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull());
381 // If this is a tag declaration with a typedef name for linkage, it's safe
382 // to load that typedef now.
383 if (NamedDeclForTagDecl)
384 cast<TagDecl>(D)->NamedDeclOrQualifier =
385 cast<NamedDecl>(Reader.GetDecl(NamedDeclForTagDecl));
386 } else if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
387 // if we have a fully initialized TypeDecl, we can safely read its type now.
388 ID->TypeForDecl = Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull();
389 } else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
390 // FunctionDecl's body was written last after all other Stmts/Exprs.
391 // We only read it if FD doesn't already have a body (e.g., from another
393 // FIXME: Also consider = default and = delete.
394 // FIXME: Can we diagnose ODR violations somehow?
396 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
397 HasPendingBody = true;
402 void ASTDeclReader::VisitDecl(Decl *D) {
403 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
404 isa<ParmVarDecl>(D)) {
405 // We don't want to deserialize the DeclContext of a template
406 // parameter or of a parameter of a function template immediately. These
407 // entities might be used in the formulation of its DeclContext (for
408 // example, a function parameter can be used in decltype() in trailing
409 // return type of the function). Use the translation unit DeclContext as a
411 GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID(Record, Idx);
412 GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID(Record, Idx);
413 Reader.addPendingDeclContextInfo(D,
414 SemaDCIDForTemplateParmDecl,
415 LexicalDCIDForTemplateParmDecl);
416 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
418 DeclContext *SemaDC = ReadDeclAs<DeclContext>(Record, Idx);
419 DeclContext *LexicalDC = ReadDeclAs<DeclContext>(Record, Idx);
420 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
421 // Avoid calling setLexicalDeclContext() directly because it uses
422 // Decl::getASTContext() internally which is unsafe during derialization.
423 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
424 Reader.getContext());
426 D->setLocation(Reader.ReadSourceLocation(F, RawLocation));
427 D->setInvalidDecl(Record[Idx++]);
428 if (Record[Idx++]) { // hasAttrs
430 Reader.ReadAttributes(F, Attrs, Record, Idx);
431 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
432 // internally which is unsafe during derialization.
433 D->setAttrsImpl(Attrs, Reader.getContext());
435 D->setImplicit(Record[Idx++]);
436 D->Used = Record[Idx++];
437 D->setReferenced(Record[Idx++]);
438 D->setTopLevelDeclInObjCContainer(Record[Idx++]);
439 D->setAccess((AccessSpecifier)Record[Idx++]);
440 D->FromASTFile = true;
441 D->setModulePrivate(Record[Idx++]);
442 D->Hidden = D->isModulePrivate();
444 // Determine whether this declaration is part of a (sub)module. If so, it
445 // may not yet be visible.
446 if (unsigned SubmoduleID = readSubmoduleID(Record, Idx)) {
447 // Store the owning submodule ID in the declaration.
448 D->setOwningModuleID(SubmoduleID);
450 // Module-private declarations are never visible, so there is no work to do.
451 if (!D->isModulePrivate()) {
452 if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
453 if (Owner->NameVisibility != Module::AllVisible) {
454 // The owning module is not visible. Mark this declaration as hidden.
457 // Note that this declaration was hidden because its owning module is
459 Reader.HiddenNamesMap[Owner].HiddenDecls.push_back(D);
466 void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
467 llvm_unreachable("Translation units are not serialized");
470 void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
472 ND->setDeclName(Reader.ReadDeclarationName(F, Record, Idx));
473 if (needsAnonymousDeclarationNumber(ND))
474 AnonymousDeclNumber = Record[Idx++];
477 void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
479 TD->setLocStart(ReadSourceLocation(Record, Idx));
480 // Delay type reading until after we have fully initialized the decl.
481 TypeIDForTypeDecl = Reader.getGlobalTypeID(F, Record[Idx++]);
484 ASTDeclReader::RedeclarableResult
485 ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
486 RedeclarableResult Redecl = VisitRedeclarable(TD);
488 TypeSourceInfo *TInfo = GetTypeSourceInfo(Record, Idx);
489 if (Record[Idx++]) { // isModed
490 QualType modedT = Reader.readType(F, Record, Idx);
491 TD->setModedTypeSourceInfo(TInfo, modedT);
493 TD->setTypeSourceInfo(TInfo);
497 void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
498 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
499 mergeRedeclarable(TD, Redecl);
502 void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
503 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
504 if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>(Record, Idx))
505 // Merged when we merge the template.
506 TD->setDescribedAliasTemplate(Template);
508 mergeRedeclarable(TD, Redecl);
511 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
512 RedeclarableResult Redecl = VisitRedeclarable(TD);
515 TD->IdentifierNamespace = Record[Idx++];
516 TD->setTagKind((TagDecl::TagKind)Record[Idx++]);
517 if (!isa<CXXRecordDecl>(TD))
518 TD->setCompleteDefinition(Record[Idx++]);
519 TD->setEmbeddedInDeclarator(Record[Idx++]);
520 TD->setFreeStanding(Record[Idx++]);
521 TD->setCompleteDefinitionRequired(Record[Idx++]);
522 TD->setRBraceLoc(ReadSourceLocation(Record, Idx));
524 switch (Record[Idx++]) {
528 TagDecl::ExtInfo *Info = new (Reader.getContext()) TagDecl::ExtInfo();
529 ReadQualifierInfo(*Info, Record, Idx);
530 TD->NamedDeclOrQualifier = Info;
533 case 2: // TypedefNameForAnonDecl
534 NamedDeclForTagDecl = ReadDeclID(Record, Idx);
535 TypedefNameForLinkage = Reader.GetIdentifierInfo(F, Record, Idx);
537 case 3: // DeclaratorForAnonDecl
538 NamedDeclForTagDecl = ReadDeclID(Record, Idx);
541 llvm_unreachable("unexpected tag info kind");
544 if (!isa<CXXRecordDecl>(TD))
545 mergeRedeclarable(TD, Redecl);
549 void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
551 if (TypeSourceInfo *TI = Reader.GetTypeSourceInfo(F, Record, Idx))
552 ED->setIntegerTypeSourceInfo(TI);
554 ED->setIntegerType(Reader.readType(F, Record, Idx));
555 ED->setPromotionType(Reader.readType(F, Record, Idx));
556 ED->setNumPositiveBits(Record[Idx++]);
557 ED->setNumNegativeBits(Record[Idx++]);
558 ED->IsScoped = Record[Idx++];
559 ED->IsScopedUsingClassTag = Record[Idx++];
560 ED->IsFixed = Record[Idx++];
562 // If this is a definition subject to the ODR, and we already have a
563 // definition, merge this one into it.
564 if (ED->IsCompleteDefinition &&
565 Reader.getContext().getLangOpts().Modules &&
566 Reader.getContext().getLangOpts().CPlusPlus) {
567 if (EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()]) {
568 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
569 ED->IsCompleteDefinition = false;
575 if (EnumDecl *InstED = ReadDeclAs<EnumDecl>(Record, Idx)) {
576 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
577 SourceLocation POI = ReadSourceLocation(Record, Idx);
578 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
579 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
583 ASTDeclReader::RedeclarableResult
584 ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
585 RedeclarableResult Redecl = VisitTagDecl(RD);
586 RD->setHasFlexibleArrayMember(Record[Idx++]);
587 RD->setAnonymousStructOrUnion(Record[Idx++]);
588 RD->setHasObjectMember(Record[Idx++]);
589 RD->setHasVolatileMember(Record[Idx++]);
593 void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
595 VD->setType(Reader.readType(F, Record, Idx));
598 void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
601 ECD->setInitExpr(Reader.ReadExpr(F));
602 ECD->setInitVal(Reader.ReadAPSInt(Record, Idx));
606 void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
608 DD->setInnerLocStart(ReadSourceLocation(Record, Idx));
609 if (Record[Idx++]) { // hasExtInfo
610 DeclaratorDecl::ExtInfo *Info
611 = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
612 ReadQualifierInfo(*Info, Record, Idx);
617 void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
618 RedeclarableResult Redecl = VisitRedeclarable(FD);
619 VisitDeclaratorDecl(FD);
621 ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName(), Record, Idx);
622 FD->IdentifierNamespace = Record[Idx++];
624 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
625 // after everything else is read.
627 FD->SClass = (StorageClass)Record[Idx++];
628 FD->IsInline = Record[Idx++];
629 FD->IsInlineSpecified = Record[Idx++];
630 FD->IsVirtualAsWritten = Record[Idx++];
631 FD->IsPure = Record[Idx++];
632 FD->HasInheritedPrototype = Record[Idx++];
633 FD->HasWrittenPrototype = Record[Idx++];
634 FD->IsDeleted = Record[Idx++];
635 FD->IsTrivial = Record[Idx++];
636 FD->IsDefaulted = Record[Idx++];
637 FD->IsExplicitlyDefaulted = Record[Idx++];
638 FD->HasImplicitReturnZero = Record[Idx++];
639 FD->IsConstexpr = Record[Idx++];
640 FD->HasSkippedBody = Record[Idx++];
641 FD->IsLateTemplateParsed = Record[Idx++];
642 FD->setCachedLinkage(Linkage(Record[Idx++]));
643 FD->EndRangeLoc = ReadSourceLocation(Record, Idx);
645 switch ((FunctionDecl::TemplatedKind)Record[Idx++]) {
646 case FunctionDecl::TK_NonTemplate:
647 mergeRedeclarable(FD, Redecl);
649 case FunctionDecl::TK_FunctionTemplate:
650 // Merged when we merge the template.
651 FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>(Record,
654 case FunctionDecl::TK_MemberSpecialization: {
655 FunctionDecl *InstFD = ReadDeclAs<FunctionDecl>(Record, Idx);
656 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
657 SourceLocation POI = ReadSourceLocation(Record, Idx);
658 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
659 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
660 mergeRedeclarable(FD, Redecl);
663 case FunctionDecl::TK_FunctionTemplateSpecialization: {
664 FunctionTemplateDecl *Template = ReadDeclAs<FunctionTemplateDecl>(Record,
666 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
668 // Template arguments.
669 SmallVector<TemplateArgument, 8> TemplArgs;
670 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
672 // Template args as written.
673 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
674 SourceLocation LAngleLoc, RAngleLoc;
675 bool HasTemplateArgumentsAsWritten = Record[Idx++];
676 if (HasTemplateArgumentsAsWritten) {
677 unsigned NumTemplateArgLocs = Record[Idx++];
678 TemplArgLocs.reserve(NumTemplateArgLocs);
679 for (unsigned i=0; i != NumTemplateArgLocs; ++i)
680 TemplArgLocs.push_back(
681 Reader.ReadTemplateArgumentLoc(F, Record, Idx));
683 LAngleLoc = ReadSourceLocation(Record, Idx);
684 RAngleLoc = ReadSourceLocation(Record, Idx);
687 SourceLocation POI = ReadSourceLocation(Record, Idx);
689 ASTContext &C = Reader.getContext();
690 TemplateArgumentList *TemplArgList
691 = TemplateArgumentList::CreateCopy(C, TemplArgs.data(), TemplArgs.size());
692 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
693 for (unsigned i=0, e = TemplArgLocs.size(); i != e; ++i)
694 TemplArgsInfo.addArgument(TemplArgLocs[i]);
695 FunctionTemplateSpecializationInfo *FTInfo
696 = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
698 HasTemplateArgumentsAsWritten ? &TemplArgsInfo
701 FD->TemplateOrSpecialization = FTInfo;
703 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
704 // The template that contains the specializations set. It's not safe to
705 // use getCanonicalDecl on Template since it may still be initializing.
706 FunctionTemplateDecl *CanonTemplate
707 = ReadDeclAs<FunctionTemplateDecl>(Record, Idx);
708 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
709 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
710 // FunctionTemplateSpecializationInfo's Profile().
711 // We avoid getASTContext because a decl in the parent hierarchy may
713 llvm::FoldingSetNodeID ID;
714 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
715 void *InsertPos = nullptr;
716 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
717 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
719 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
721 assert(Reader.getContext().getLangOpts().Modules &&
722 "already deserialized this template specialization");
723 // FIXME: This specialization is a redeclaration of one from another
729 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
731 UnresolvedSet<8> TemplDecls;
732 unsigned NumTemplates = Record[Idx++];
733 while (NumTemplates--)
734 TemplDecls.addDecl(ReadDeclAs<NamedDecl>(Record, Idx));
737 TemplateArgumentListInfo TemplArgs;
738 unsigned NumArgs = Record[Idx++];
740 TemplArgs.addArgument(Reader.ReadTemplateArgumentLoc(F, Record, Idx));
741 TemplArgs.setLAngleLoc(ReadSourceLocation(Record, Idx));
742 TemplArgs.setRAngleLoc(ReadSourceLocation(Record, Idx));
744 FD->setDependentTemplateSpecialization(Reader.getContext(),
745 TemplDecls, TemplArgs);
752 // Read in the parameters.
753 unsigned NumParams = Record[Idx++];
754 SmallVector<ParmVarDecl *, 16> Params;
755 Params.reserve(NumParams);
756 for (unsigned I = 0; I != NumParams; ++I)
757 Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
758 FD->setParams(Reader.getContext(), Params);
761 void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
764 // Load the body on-demand. Most clients won't care, because method
765 // definitions rarely show up in headers.
766 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
767 HasPendingBody = true;
768 MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>(Record, Idx));
769 MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>(Record, Idx));
771 MD->setInstanceMethod(Record[Idx++]);
772 MD->setVariadic(Record[Idx++]);
773 MD->setPropertyAccessor(Record[Idx++]);
774 MD->setDefined(Record[Idx++]);
775 MD->IsOverriding = Record[Idx++];
776 MD->HasSkippedBody = Record[Idx++];
778 MD->IsRedeclaration = Record[Idx++];
779 MD->HasRedeclaration = Record[Idx++];
780 if (MD->HasRedeclaration)
781 Reader.getContext().setObjCMethodRedeclaration(MD,
782 ReadDeclAs<ObjCMethodDecl>(Record, Idx));
784 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record[Idx++]);
785 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record[Idx++]);
786 MD->SetRelatedResultType(Record[Idx++]);
787 MD->setReturnType(Reader.readType(F, Record, Idx));
788 MD->setReturnTypeSourceInfo(GetTypeSourceInfo(Record, Idx));
789 MD->DeclEndLoc = ReadSourceLocation(Record, Idx);
790 unsigned NumParams = Record[Idx++];
791 SmallVector<ParmVarDecl *, 16> Params;
792 Params.reserve(NumParams);
793 for (unsigned I = 0; I != NumParams; ++I)
794 Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
796 MD->SelLocsKind = Record[Idx++];
797 unsigned NumStoredSelLocs = Record[Idx++];
798 SmallVector<SourceLocation, 16> SelLocs;
799 SelLocs.reserve(NumStoredSelLocs);
800 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
801 SelLocs.push_back(ReadSourceLocation(Record, Idx));
803 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
806 void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
808 CD->setAtStartLoc(ReadSourceLocation(Record, Idx));
809 CD->setAtEndRange(ReadSourceRange(Record, Idx));
812 void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
813 RedeclarableResult Redecl = VisitRedeclarable(ID);
814 VisitObjCContainerDecl(ID);
815 TypeIDForTypeDecl = Reader.getGlobalTypeID(F, Record[Idx++]);
816 mergeRedeclarable(ID, Redecl);
819 // Read the definition.
820 ID->allocateDefinitionData();
822 // Set the definition data of the canonical declaration, so other
823 // redeclarations will see it.
824 ID->getCanonicalDecl()->Data = ID->Data;
826 ObjCInterfaceDecl::DefinitionData &Data = ID->data();
828 // Read the superclass.
829 Data.SuperClass = ReadDeclAs<ObjCInterfaceDecl>(Record, Idx);
830 Data.SuperClassLoc = ReadSourceLocation(Record, Idx);
832 Data.EndLoc = ReadSourceLocation(Record, Idx);
833 Data.HasDesignatedInitializers = Record[Idx++];
835 // Read the directly referenced protocols and their SourceLocations.
836 unsigned NumProtocols = Record[Idx++];
837 SmallVector<ObjCProtocolDecl *, 16> Protocols;
838 Protocols.reserve(NumProtocols);
839 for (unsigned I = 0; I != NumProtocols; ++I)
840 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
841 SmallVector<SourceLocation, 16> ProtoLocs;
842 ProtoLocs.reserve(NumProtocols);
843 for (unsigned I = 0; I != NumProtocols; ++I)
844 ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
845 ID->setProtocolList(Protocols.data(), NumProtocols, ProtoLocs.data(),
846 Reader.getContext());
848 // Read the transitive closure of protocols referenced by this class.
849 NumProtocols = Record[Idx++];
851 Protocols.reserve(NumProtocols);
852 for (unsigned I = 0; I != NumProtocols; ++I)
853 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
854 ID->data().AllReferencedProtocols.set(Protocols.data(), NumProtocols,
855 Reader.getContext());
857 // We will rebuild this list lazily.
858 ID->setIvarList(nullptr);
860 // Note that we have deserialized a definition.
861 Reader.PendingDefinitions.insert(ID);
863 // Note that we've loaded this Objective-C class.
864 Reader.ObjCClassesLoaded.push_back(ID);
866 ID->Data = ID->getCanonicalDecl()->Data;
870 void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
872 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record[Idx++]);
873 // This field will be built lazily.
874 IVD->setNextIvar(nullptr);
875 bool synth = Record[Idx++];
876 IVD->setSynthesize(synth);
879 void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
880 RedeclarableResult Redecl = VisitRedeclarable(PD);
881 VisitObjCContainerDecl(PD);
882 mergeRedeclarable(PD, Redecl);
885 // Read the definition.
886 PD->allocateDefinitionData();
888 // Set the definition data of the canonical declaration, so other
889 // redeclarations will see it.
890 PD->getCanonicalDecl()->Data = PD->Data;
892 unsigned NumProtoRefs = Record[Idx++];
893 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
894 ProtoRefs.reserve(NumProtoRefs);
895 for (unsigned I = 0; I != NumProtoRefs; ++I)
896 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
897 SmallVector<SourceLocation, 16> ProtoLocs;
898 ProtoLocs.reserve(NumProtoRefs);
899 for (unsigned I = 0; I != NumProtoRefs; ++I)
900 ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
901 PD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
902 Reader.getContext());
904 // Note that we have deserialized a definition.
905 Reader.PendingDefinitions.insert(PD);
907 PD->Data = PD->getCanonicalDecl()->Data;
911 void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
915 void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
916 VisitObjCContainerDecl(CD);
917 CD->setCategoryNameLoc(ReadSourceLocation(Record, Idx));
918 CD->setIvarLBraceLoc(ReadSourceLocation(Record, Idx));
919 CD->setIvarRBraceLoc(ReadSourceLocation(Record, Idx));
921 // Note that this category has been deserialized. We do this before
922 // deserializing the interface declaration, so that it will consider this
924 Reader.CategoriesDeserialized.insert(CD);
926 CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>(Record, Idx);
927 unsigned NumProtoRefs = Record[Idx++];
928 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
929 ProtoRefs.reserve(NumProtoRefs);
930 for (unsigned I = 0; I != NumProtoRefs; ++I)
931 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
932 SmallVector<SourceLocation, 16> ProtoLocs;
933 ProtoLocs.reserve(NumProtoRefs);
934 for (unsigned I = 0; I != NumProtoRefs; ++I)
935 ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
936 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
937 Reader.getContext());
940 void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
942 CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
945 void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
947 D->setAtLoc(ReadSourceLocation(Record, Idx));
948 D->setLParenLoc(ReadSourceLocation(Record, Idx));
949 D->setType(GetTypeSourceInfo(Record, Idx));
950 // FIXME: stable encoding
951 D->setPropertyAttributes(
952 (ObjCPropertyDecl::PropertyAttributeKind)Record[Idx++]);
953 D->setPropertyAttributesAsWritten(
954 (ObjCPropertyDecl::PropertyAttributeKind)Record[Idx++]);
955 // FIXME: stable encoding
956 D->setPropertyImplementation(
957 (ObjCPropertyDecl::PropertyControl)Record[Idx++]);
958 D->setGetterName(Reader.ReadDeclarationName(F,Record, Idx).getObjCSelector());
959 D->setSetterName(Reader.ReadDeclarationName(F,Record, Idx).getObjCSelector());
960 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>(Record, Idx));
961 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>(Record, Idx));
962 D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>(Record, Idx));
965 void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
966 VisitObjCContainerDecl(D);
967 D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
970 void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
971 VisitObjCImplDecl(D);
972 D->setIdentifier(Reader.GetIdentifierInfo(F, Record, Idx));
973 D->CategoryNameLoc = ReadSourceLocation(Record, Idx);
976 void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
977 VisitObjCImplDecl(D);
978 D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
979 D->SuperLoc = ReadSourceLocation(Record, Idx);
980 D->setIvarLBraceLoc(ReadSourceLocation(Record, Idx));
981 D->setIvarRBraceLoc(ReadSourceLocation(Record, Idx));
982 D->setHasNonZeroConstructors(Record[Idx++]);
983 D->setHasDestructors(Record[Idx++]);
984 std::tie(D->IvarInitializers, D->NumIvarInitializers) =
985 Reader.ReadCXXCtorInitializers(F, Record, Idx);
989 void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
991 D->setAtLoc(ReadSourceLocation(Record, Idx));
992 D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>(Record, Idx));
993 D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>(Record, Idx);
994 D->IvarLoc = ReadSourceLocation(Record, Idx);
995 D->setGetterCXXConstructor(Reader.ReadExpr(F));
996 D->setSetterCXXAssignment(Reader.ReadExpr(F));
999 void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1000 VisitDeclaratorDecl(FD);
1001 FD->Mutable = Record[Idx++];
1002 if (int BitWidthOrInitializer = Record[Idx++]) {
1003 FD->InitStorage.setInt(
1004 static_cast<FieldDecl::InitStorageKind>(BitWidthOrInitializer - 1));
1005 if (FD->InitStorage.getInt() == FieldDecl::ISK_CapturedVLAType) {
1006 // Read captured variable length array.
1007 FD->InitStorage.setPointer(
1008 Reader.readType(F, Record, Idx).getAsOpaquePtr());
1010 FD->InitStorage.setPointer(Reader.ReadExpr(F));
1013 if (!FD->getDeclName()) {
1014 if (FieldDecl *Tmpl = ReadDeclAs<FieldDecl>(Record, Idx))
1015 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1020 void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1021 VisitDeclaratorDecl(PD);
1022 PD->GetterId = Reader.GetIdentifierInfo(F, Record, Idx);
1023 PD->SetterId = Reader.GetIdentifierInfo(F, Record, Idx);
1026 void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1029 FD->ChainingSize = Record[Idx++];
1030 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1031 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1033 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1034 FD->Chaining[I] = ReadDeclAs<NamedDecl>(Record, Idx);
1037 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1038 RedeclarableResult Redecl = VisitRedeclarable(VD);
1039 VisitDeclaratorDecl(VD);
1041 VD->VarDeclBits.SClass = (StorageClass)Record[Idx++];
1042 VD->VarDeclBits.TSCSpec = Record[Idx++];
1043 VD->VarDeclBits.InitStyle = Record[Idx++];
1044 VD->VarDeclBits.ExceptionVar = Record[Idx++];
1045 VD->VarDeclBits.NRVOVariable = Record[Idx++];
1046 VD->VarDeclBits.CXXForRangeDecl = Record[Idx++];
1047 VD->VarDeclBits.ARCPseudoStrong = Record[Idx++];
1048 VD->VarDeclBits.IsConstexpr = Record[Idx++];
1049 VD->VarDeclBits.IsInitCapture = Record[Idx++];
1050 VD->VarDeclBits.PreviousDeclInSameBlockScope = Record[Idx++];
1051 Linkage VarLinkage = Linkage(Record[Idx++]);
1052 VD->setCachedLinkage(VarLinkage);
1054 // Reconstruct the one piece of the IdentifierNamespace that we need.
1055 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1056 VD->getLexicalDeclContext()->isFunctionOrMethod())
1057 VD->setLocalExternDecl();
1059 if (uint64_t Val = Record[Idx++]) {
1060 VD->setInit(Reader.ReadExpr(F));
1062 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1063 Eval->CheckedICE = true;
1064 Eval->IsICE = Val == 3;
1069 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1071 switch ((VarKind)Record[Idx++]) {
1072 case VarNotTemplate:
1073 // Only true variables (not parameters or implicit parameters) can be merged
1074 if (VD->getKind() != Decl::ParmVar && VD->getKind() != Decl::ImplicitParam &&
1075 !isa<VarTemplateSpecializationDecl>(VD))
1076 mergeRedeclarable(VD, Redecl);
1079 // Merged when we merge the template.
1080 VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>(Record, Idx));
1082 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1083 VarDecl *Tmpl = ReadDeclAs<VarDecl>(Record, Idx);
1084 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
1085 SourceLocation POI = ReadSourceLocation(Record, Idx);
1086 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1087 mergeRedeclarable(VD, Redecl);
1095 void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1099 void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1101 unsigned isObjCMethodParam = Record[Idx++];
1102 unsigned scopeDepth = Record[Idx++];
1103 unsigned scopeIndex = Record[Idx++];
1104 unsigned declQualifier = Record[Idx++];
1105 if (isObjCMethodParam) {
1106 assert(scopeDepth == 0);
1107 PD->setObjCMethodScopeInfo(scopeIndex);
1108 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1110 PD->setScopeInfo(scopeDepth, scopeIndex);
1112 PD->ParmVarDeclBits.IsKNRPromoted = Record[Idx++];
1113 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record[Idx++];
1114 if (Record[Idx++]) // hasUninstantiatedDefaultArg.
1115 PD->setUninstantiatedDefaultArg(Reader.ReadExpr(F));
1117 // FIXME: If this is a redeclaration of a function from another module, handle
1118 // inheritance of default arguments.
1121 void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1123 AD->setAsmString(cast<StringLiteral>(Reader.ReadExpr(F)));
1124 AD->setRParenLoc(ReadSourceLocation(Record, Idx));
1127 void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1129 BD->setBody(cast_or_null<CompoundStmt>(Reader.ReadStmt(F)));
1130 BD->setSignatureAsWritten(GetTypeSourceInfo(Record, Idx));
1131 unsigned NumParams = Record[Idx++];
1132 SmallVector<ParmVarDecl *, 16> Params;
1133 Params.reserve(NumParams);
1134 for (unsigned I = 0; I != NumParams; ++I)
1135 Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
1136 BD->setParams(Params);
1138 BD->setIsVariadic(Record[Idx++]);
1139 BD->setBlockMissingReturnType(Record[Idx++]);
1140 BD->setIsConversionFromLambda(Record[Idx++]);
1142 bool capturesCXXThis = Record[Idx++];
1143 unsigned numCaptures = Record[Idx++];
1144 SmallVector<BlockDecl::Capture, 16> captures;
1145 captures.reserve(numCaptures);
1146 for (unsigned i = 0; i != numCaptures; ++i) {
1147 VarDecl *decl = ReadDeclAs<VarDecl>(Record, Idx);
1148 unsigned flags = Record[Idx++];
1149 bool byRef = (flags & 1);
1150 bool nested = (flags & 2);
1151 Expr *copyExpr = ((flags & 4) ? Reader.ReadExpr(F) : nullptr);
1153 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1155 BD->setCaptures(Reader.getContext(), captures.begin(),
1156 captures.end(), capturesCXXThis);
1159 void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1161 unsigned ContextParamPos = Record[Idx++];
1162 CD->setNothrow(Record[Idx++] != 0);
1163 // Body is set by VisitCapturedStmt.
1164 for (unsigned I = 0; I < CD->NumParams; ++I) {
1165 if (I != ContextParamPos)
1166 CD->setParam(I, ReadDeclAs<ImplicitParamDecl>(Record, Idx));
1168 CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>(Record, Idx));
1172 void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1174 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record[Idx++]);
1175 D->setExternLoc(ReadSourceLocation(Record, Idx));
1176 D->setRBraceLoc(ReadSourceLocation(Record, Idx));
1179 void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1181 D->setLocStart(ReadSourceLocation(Record, Idx));
1185 void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1186 RedeclarableResult Redecl = VisitRedeclarable(D);
1188 D->setInline(Record[Idx++]);
1189 D->LocStart = ReadSourceLocation(Record, Idx);
1190 D->RBraceLoc = ReadSourceLocation(Record, Idx);
1192 if (Redecl.getFirstID() == ThisDeclID) {
1193 // Each module has its own anonymous namespace, which is disjoint from
1194 // any other module's anonymous namespaces, so don't attach the anonymous
1195 // namespace at all.
1196 NamespaceDecl *Anon = ReadDeclAs<NamespaceDecl>(Record, Idx);
1197 if (F.Kind != MK_ImplicitModule && F.Kind != MK_ExplicitModule)
1198 D->setAnonymousNamespace(Anon);
1200 // Link this namespace back to the first declaration, which has already
1201 // been deserialized.
1202 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1205 mergeRedeclarable(D, Redecl);
1208 void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1209 RedeclarableResult Redecl = VisitRedeclarable(D);
1211 D->NamespaceLoc = ReadSourceLocation(Record, Idx);
1212 D->IdentLoc = ReadSourceLocation(Record, Idx);
1213 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1214 D->Namespace = ReadDeclAs<NamedDecl>(Record, Idx);
1215 mergeRedeclarable(D, Redecl);
1218 void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1220 D->setUsingLoc(ReadSourceLocation(Record, Idx));
1221 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1222 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record, Idx);
1223 D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>(Record, Idx));
1224 D->setTypename(Record[Idx++]);
1225 if (NamedDecl *Pattern = ReadDeclAs<NamedDecl>(Record, Idx))
1226 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1230 void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1231 RedeclarableResult Redecl = VisitRedeclarable(D);
1233 D->setTargetDecl(ReadDeclAs<NamedDecl>(Record, Idx));
1234 D->UsingOrNextShadow = ReadDeclAs<NamedDecl>(Record, Idx);
1235 UsingShadowDecl *Pattern = ReadDeclAs<UsingShadowDecl>(Record, Idx);
1237 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1238 mergeRedeclarable(D, Redecl);
1241 void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1243 D->UsingLoc = ReadSourceLocation(Record, Idx);
1244 D->NamespaceLoc = ReadSourceLocation(Record, Idx);
1245 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1246 D->NominatedNamespace = ReadDeclAs<NamedDecl>(Record, Idx);
1247 D->CommonAncestor = ReadDeclAs<DeclContext>(Record, Idx);
1250 void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1252 D->setUsingLoc(ReadSourceLocation(Record, Idx));
1253 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1254 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record, Idx);
1258 void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1259 UnresolvedUsingTypenameDecl *D) {
1261 D->TypenameLocation = ReadSourceLocation(Record, Idx);
1262 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1266 void ASTDeclReader::ReadCXXDefinitionData(
1267 struct CXXRecordDecl::DefinitionData &Data,
1268 const RecordData &Record, unsigned &Idx) {
1269 // Note: the caller has deserialized the IsLambda bit already.
1270 Data.UserDeclaredConstructor = Record[Idx++];
1271 Data.UserDeclaredSpecialMembers = Record[Idx++];
1272 Data.Aggregate = Record[Idx++];
1273 Data.PlainOldData = Record[Idx++];
1274 Data.Empty = Record[Idx++];
1275 Data.Polymorphic = Record[Idx++];
1276 Data.Abstract = Record[Idx++];
1277 Data.IsStandardLayout = Record[Idx++];
1278 Data.HasNoNonEmptyBases = Record[Idx++];
1279 Data.HasPrivateFields = Record[Idx++];
1280 Data.HasProtectedFields = Record[Idx++];
1281 Data.HasPublicFields = Record[Idx++];
1282 Data.HasMutableFields = Record[Idx++];
1283 Data.HasVariantMembers = Record[Idx++];
1284 Data.HasOnlyCMembers = Record[Idx++];
1285 Data.HasInClassInitializer = Record[Idx++];
1286 Data.HasUninitializedReferenceMember = Record[Idx++];
1287 Data.NeedOverloadResolutionForMoveConstructor = Record[Idx++];
1288 Data.NeedOverloadResolutionForMoveAssignment = Record[Idx++];
1289 Data.NeedOverloadResolutionForDestructor = Record[Idx++];
1290 Data.DefaultedMoveConstructorIsDeleted = Record[Idx++];
1291 Data.DefaultedMoveAssignmentIsDeleted = Record[Idx++];
1292 Data.DefaultedDestructorIsDeleted = Record[Idx++];
1293 Data.HasTrivialSpecialMembers = Record[Idx++];
1294 Data.DeclaredNonTrivialSpecialMembers = Record[Idx++];
1295 Data.HasIrrelevantDestructor = Record[Idx++];
1296 Data.HasConstexprNonCopyMoveConstructor = Record[Idx++];
1297 Data.DefaultedDefaultConstructorIsConstexpr = Record[Idx++];
1298 Data.HasConstexprDefaultConstructor = Record[Idx++];
1299 Data.HasNonLiteralTypeFieldsOrBases = Record[Idx++];
1300 Data.ComputedVisibleConversions = Record[Idx++];
1301 Data.UserProvidedDefaultConstructor = Record[Idx++];
1302 Data.DeclaredSpecialMembers = Record[Idx++];
1303 Data.ImplicitCopyConstructorHasConstParam = Record[Idx++];
1304 Data.ImplicitCopyAssignmentHasConstParam = Record[Idx++];
1305 Data.HasDeclaredCopyConstructorWithConstParam = Record[Idx++];
1306 Data.HasDeclaredCopyAssignmentWithConstParam = Record[Idx++];
1308 Data.NumBases = Record[Idx++];
1310 Data.Bases = Reader.readCXXBaseSpecifiers(F, Record, Idx);
1311 Data.NumVBases = Record[Idx++];
1313 Data.VBases = Reader.readCXXBaseSpecifiers(F, Record, Idx);
1315 Reader.ReadUnresolvedSet(F, Data.Conversions, Record, Idx);
1316 Reader.ReadUnresolvedSet(F, Data.VisibleConversions, Record, Idx);
1317 assert(Data.Definition && "Data.Definition should be already set!");
1318 Data.FirstFriend = ReadDeclID(Record, Idx);
1320 if (Data.IsLambda) {
1321 typedef LambdaCapture Capture;
1322 CXXRecordDecl::LambdaDefinitionData &Lambda
1323 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1324 Lambda.Dependent = Record[Idx++];
1325 Lambda.IsGenericLambda = Record[Idx++];
1326 Lambda.CaptureDefault = Record[Idx++];
1327 Lambda.NumCaptures = Record[Idx++];
1328 Lambda.NumExplicitCaptures = Record[Idx++];
1329 Lambda.ManglingNumber = Record[Idx++];
1330 Lambda.ContextDecl = ReadDecl(Record, Idx);
1332 = (Capture*)Reader.Context.Allocate(sizeof(Capture)*Lambda.NumCaptures);
1333 Capture *ToCapture = Lambda.Captures;
1334 Lambda.MethodTyInfo = GetTypeSourceInfo(Record, Idx);
1335 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1336 SourceLocation Loc = ReadSourceLocation(Record, Idx);
1337 bool IsImplicit = Record[Idx++];
1338 LambdaCaptureKind Kind = static_cast<LambdaCaptureKind>(Record[Idx++]);
1342 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1346 VarDecl *Var = ReadDeclAs<VarDecl>(Record, Idx);
1347 SourceLocation EllipsisLoc = ReadSourceLocation(Record, Idx);
1348 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1355 void ASTDeclReader::MergeDefinitionData(
1356 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &MergeDD) {
1357 assert(D->DefinitionData.getNotUpdated() &&
1358 "merging class definition into non-definition");
1359 auto &DD = *D->DefinitionData.getNotUpdated();
1361 // If the new definition has new special members, let the name lookup
1362 // code know that it needs to look in the new definition too.
1364 // FIXME: We only need to do this if the merged definition declares members
1365 // that this definition did not declare, or if it defines members that this
1366 // definition did not define.
1367 if (MergeDD.DeclaredSpecialMembers && DD.Definition != MergeDD.Definition) {
1368 Reader.MergedLookups[DD.Definition].push_back(MergeDD.Definition);
1369 DD.Definition->setHasExternalVisibleStorage();
1372 // FIXME: Move this out into a .def file?
1373 // FIXME: Issue a diagnostic on a mismatched MATCH_FIELD, rather than
1374 // asserting; this can happen in the case of an ODR violation.
1375 bool DetectedOdrViolation = false;
1376 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1377 #define MATCH_FIELD(Field) \
1378 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1380 MATCH_FIELD(UserDeclaredConstructor)
1381 MATCH_FIELD(UserDeclaredSpecialMembers)
1382 MATCH_FIELD(Aggregate)
1383 MATCH_FIELD(PlainOldData)
1385 MATCH_FIELD(Polymorphic)
1386 MATCH_FIELD(Abstract)
1387 MATCH_FIELD(IsStandardLayout)
1388 MATCH_FIELD(HasNoNonEmptyBases)
1389 MATCH_FIELD(HasPrivateFields)
1390 MATCH_FIELD(HasProtectedFields)
1391 MATCH_FIELD(HasPublicFields)
1392 MATCH_FIELD(HasMutableFields)
1393 MATCH_FIELD(HasVariantMembers)
1394 MATCH_FIELD(HasOnlyCMembers)
1395 MATCH_FIELD(HasInClassInitializer)
1396 MATCH_FIELD(HasUninitializedReferenceMember)
1397 MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1398 MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1399 MATCH_FIELD(NeedOverloadResolutionForDestructor)
1400 MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1401 MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1402 MATCH_FIELD(DefaultedDestructorIsDeleted)
1403 OR_FIELD(HasTrivialSpecialMembers)
1404 OR_FIELD(DeclaredNonTrivialSpecialMembers)
1405 MATCH_FIELD(HasIrrelevantDestructor)
1406 OR_FIELD(HasConstexprNonCopyMoveConstructor)
1407 MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1408 OR_FIELD(HasConstexprDefaultConstructor)
1409 MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1410 // ComputedVisibleConversions is handled below.
1411 MATCH_FIELD(UserProvidedDefaultConstructor)
1412 OR_FIELD(DeclaredSpecialMembers)
1413 MATCH_FIELD(ImplicitCopyConstructorHasConstParam)
1414 MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1415 OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1416 OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1417 MATCH_FIELD(IsLambda)
1421 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1422 DetectedOdrViolation = true;
1423 // FIXME: Issue a diagnostic if the base classes don't match when we come
1424 // to lazily load them.
1426 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1427 // match when we come to lazily load them.
1428 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1429 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1430 DD.ComputedVisibleConversions = true;
1433 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1437 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1438 // when they occur within the body of a function template specialization).
1441 if (DetectedOdrViolation)
1442 Reader.PendingOdrMergeFailures[DD.Definition].push_back(MergeDD.Definition);
1445 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D) {
1446 struct CXXRecordDecl::DefinitionData *DD;
1447 ASTContext &C = Reader.getContext();
1449 // Determine whether this is a lambda closure type, so that we can
1450 // allocate the appropriate DefinitionData structure.
1451 bool IsLambda = Record[Idx++];
1453 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1456 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1458 ReadCXXDefinitionData(*DD, Record, Idx);
1460 // If we're reading an update record, we might already have a definition for
1461 // this record. If so, just merge into it.
1462 if (D->DefinitionData.getNotUpdated()) {
1463 MergeDefinitionData(D, *DD);
1467 // Propagate the DefinitionData pointer to the canonical declaration, so
1468 // that all other deserialized declarations will see it.
1469 CXXRecordDecl *Canon = D->getCanonicalDecl();
1471 D->DefinitionData = DD;
1472 D->IsCompleteDefinition = true;
1473 } else if (auto *CanonDD = Canon->DefinitionData.getNotUpdated()) {
1474 // We have already deserialized a definition of this record. This
1475 // definition is no longer really a definition. Note that the pre-existing
1476 // definition is the *real* definition.
1477 Reader.MergedDeclContexts.insert(
1478 std::make_pair(D, CanonDD->Definition));
1479 D->DefinitionData = Canon->DefinitionData;
1480 D->IsCompleteDefinition = false;
1481 MergeDefinitionData(D, *DD);
1483 Canon->DefinitionData = DD;
1484 D->DefinitionData = Canon->DefinitionData;
1485 D->IsCompleteDefinition = true;
1487 // Note that we have deserialized a definition. Any declarations
1488 // deserialized before this one will be be given the DefinitionData
1489 // pointer at the end.
1490 Reader.PendingDefinitions.insert(D);
1494 ASTDeclReader::RedeclarableResult
1495 ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1496 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1498 ASTContext &C = Reader.getContext();
1501 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1503 switch ((CXXRecKind)Record[Idx++]) {
1504 case CXXRecNotTemplate:
1505 // Merged when we merge the folding set entry in the primary template.
1506 if (!isa<ClassTemplateSpecializationDecl>(D))
1507 mergeRedeclarable(D, Redecl);
1509 case CXXRecTemplate: {
1510 // Merged when we merge the template.
1511 ClassTemplateDecl *Template = ReadDeclAs<ClassTemplateDecl>(Record, Idx);
1512 D->TemplateOrInstantiation = Template;
1513 if (!Template->getTemplatedDecl()) {
1514 // We've not actually loaded the ClassTemplateDecl yet, because we're
1515 // currently being loaded as its pattern. Rely on it to set up our
1516 // TypeForDecl (see VisitClassTemplateDecl).
1518 // Beware: we do not yet know our canonical declaration, and may still
1519 // get merged once the surrounding class template has got off the ground.
1520 TypeIDForTypeDecl = 0;
1524 case CXXRecMemberSpecialization: {
1525 CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>(Record, Idx);
1526 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
1527 SourceLocation POI = ReadSourceLocation(Record, Idx);
1528 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1529 MSI->setPointOfInstantiation(POI);
1530 D->TemplateOrInstantiation = MSI;
1531 mergeRedeclarable(D, Redecl);
1536 bool WasDefinition = Record[Idx++];
1538 ReadCXXRecordDefinition(D);
1540 // Propagate DefinitionData pointer from the canonical declaration.
1541 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1543 // Lazily load the key function to avoid deserializing every method so we can
1545 if (WasDefinition) {
1546 DeclID KeyFn = ReadDeclID(Record, Idx);
1547 if (KeyFn && D->IsCompleteDefinition)
1548 // FIXME: This is wrong for the ARM ABI, where some other module may have
1549 // made this function no longer be a key function. We need an update
1550 // record or similar for that case.
1551 C.KeyFunctions[D] = KeyFn;
1557 void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1558 VisitFunctionDecl(D);
1560 unsigned NumOverridenMethods = Record[Idx++];
1561 if (D->isCanonicalDecl()) {
1562 while (NumOverridenMethods--) {
1563 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1564 // MD may be initializing.
1565 if (CXXMethodDecl *MD = ReadDeclAs<CXXMethodDecl>(Record, Idx))
1566 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1569 // We don't care about which declarations this used to override; we get
1570 // the relevant information from the canonical declaration.
1571 Idx += NumOverridenMethods;
1575 void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1576 VisitCXXMethodDecl(D);
1578 if (auto *CD = ReadDeclAs<CXXConstructorDecl>(Record, Idx))
1579 D->setInheritedConstructor(CD);
1580 D->IsExplicitSpecified = Record[Idx++];
1581 // FIXME: We should defer loading this until we need the constructor's body.
1582 std::tie(D->CtorInitializers, D->NumCtorInitializers) =
1583 Reader.ReadCXXCtorInitializers(F, Record, Idx);
1586 void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1587 VisitCXXMethodDecl(D);
1589 D->OperatorDelete = ReadDeclAs<FunctionDecl>(Record, Idx);
1592 void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1593 VisitCXXMethodDecl(D);
1594 D->IsExplicitSpecified = Record[Idx++];
1597 void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1599 D->ImportedAndComplete.setPointer(readModule(Record, Idx));
1600 D->ImportedAndComplete.setInt(Record[Idx++]);
1601 SourceLocation *StoredLocs = reinterpret_cast<SourceLocation *>(D + 1);
1602 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1603 StoredLocs[I] = ReadSourceLocation(Record, Idx);
1604 ++Idx; // The number of stored source locations.
1607 void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1609 D->setColonLoc(ReadSourceLocation(Record, Idx));
1612 void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1614 if (Record[Idx++]) // hasFriendDecl
1615 D->Friend = ReadDeclAs<NamedDecl>(Record, Idx);
1617 D->Friend = GetTypeSourceInfo(Record, Idx);
1618 for (unsigned i = 0; i != D->NumTPLists; ++i)
1619 D->getTPLists()[i] = Reader.ReadTemplateParameterList(F, Record, Idx);
1620 D->NextFriend = ReadDeclID(Record, Idx);
1621 D->UnsupportedFriend = (Record[Idx++] != 0);
1622 D->FriendLoc = ReadSourceLocation(Record, Idx);
1625 void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1627 unsigned NumParams = Record[Idx++];
1628 D->NumParams = NumParams;
1629 D->Params = new TemplateParameterList*[NumParams];
1630 for (unsigned i = 0; i != NumParams; ++i)
1631 D->Params[i] = Reader.ReadTemplateParameterList(F, Record, Idx);
1632 if (Record[Idx++]) // HasFriendDecl
1633 D->Friend = ReadDeclAs<NamedDecl>(Record, Idx);
1635 D->Friend = GetTypeSourceInfo(Record, Idx);
1636 D->FriendLoc = ReadSourceLocation(Record, Idx);
1639 DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
1642 DeclID PatternID = ReadDeclID(Record, Idx);
1643 NamedDecl *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
1644 TemplateParameterList* TemplateParams
1645 = Reader.ReadTemplateParameterList(F, Record, Idx);
1646 D->init(TemplatedDecl, TemplateParams);
1648 // FIXME: If this is a redeclaration of a template from another module, handle
1649 // inheritance of default template arguments.
1654 ASTDeclReader::RedeclarableResult
1655 ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1656 RedeclarableResult Redecl = VisitRedeclarable(D);
1658 // Make sure we've allocated the Common pointer first. We do this before
1659 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
1660 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
1661 if (!CanonD->Common) {
1662 CanonD->Common = CanonD->newCommon(Reader.getContext());
1663 Reader.PendingDefinitions.insert(CanonD);
1665 D->Common = CanonD->Common;
1667 // If this is the first declaration of the template, fill in the information
1668 // for the 'common' pointer.
1669 if (ThisDeclID == Redecl.getFirstID()) {
1670 if (RedeclarableTemplateDecl *RTD
1671 = ReadDeclAs<RedeclarableTemplateDecl>(Record, Idx)) {
1672 assert(RTD->getKind() == D->getKind() &&
1673 "InstantiatedFromMemberTemplate kind mismatch");
1674 D->setInstantiatedFromMemberTemplate(RTD);
1676 D->setMemberSpecialization();
1680 DeclID PatternID = VisitTemplateDecl(D);
1681 D->IdentifierNamespace = Record[Idx++];
1683 mergeRedeclarable(D, Redecl, PatternID);
1685 // If we merged the template with a prior declaration chain, merge the common
1687 // FIXME: Actually merge here, don't just overwrite.
1688 D->Common = D->getCanonicalDecl()->Common;
1693 void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1694 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
1696 if (ThisDeclID == Redecl.getFirstID()) {
1697 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
1698 // the specializations.
1699 SmallVector<serialization::DeclID, 2> SpecIDs;
1700 SpecIDs.push_back(0);
1703 unsigned Size = Record[Idx++];
1705 for (unsigned I = 0; I != Size; ++I)
1706 SpecIDs.push_back(ReadDeclID(Record, Idx));
1708 // Partial specializations.
1709 Size = Record[Idx++];
1711 for (unsigned I = 0; I != Size; ++I)
1712 SpecIDs.push_back(ReadDeclID(Record, Idx));
1714 ClassTemplateDecl::Common *CommonPtr = D->getCommonPtr();
1716 typedef serialization::DeclID DeclID;
1718 // FIXME: Append specializations!
1719 CommonPtr->LazySpecializations
1720 = new (Reader.getContext()) DeclID [SpecIDs.size()];
1721 memcpy(CommonPtr->LazySpecializations, SpecIDs.data(),
1722 SpecIDs.size() * sizeof(DeclID));
1726 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
1727 // We were loaded before our templated declaration was. We've not set up
1728 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
1730 Reader.Context.getInjectedClassNameType(
1731 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
1735 /// TODO: Unify with ClassTemplateDecl version?
1736 /// May require unifying ClassTemplateDecl and
1737 /// VarTemplateDecl beyond TemplateDecl...
1738 void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
1739 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
1741 if (ThisDeclID == Redecl.getFirstID()) {
1742 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
1743 // the specializations.
1744 SmallVector<serialization::DeclID, 2> SpecIDs;
1745 SpecIDs.push_back(0);
1748 unsigned Size = Record[Idx++];
1750 for (unsigned I = 0; I != Size; ++I)
1751 SpecIDs.push_back(ReadDeclID(Record, Idx));
1753 // Partial specializations.
1754 Size = Record[Idx++];
1756 for (unsigned I = 0; I != Size; ++I)
1757 SpecIDs.push_back(ReadDeclID(Record, Idx));
1759 VarTemplateDecl::Common *CommonPtr = D->getCommonPtr();
1761 typedef serialization::DeclID DeclID;
1763 // FIXME: Append specializations!
1764 CommonPtr->LazySpecializations =
1765 new (Reader.getContext()) DeclID[SpecIDs.size()];
1766 memcpy(CommonPtr->LazySpecializations, SpecIDs.data(),
1767 SpecIDs.size() * sizeof(DeclID));
1772 ASTDeclReader::RedeclarableResult
1773 ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
1774 ClassTemplateSpecializationDecl *D) {
1775 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
1777 ASTContext &C = Reader.getContext();
1778 if (Decl *InstD = ReadDecl(Record, Idx)) {
1779 if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
1780 D->SpecializedTemplate = CTD;
1782 SmallVector<TemplateArgument, 8> TemplArgs;
1783 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
1784 TemplateArgumentList *ArgList
1785 = TemplateArgumentList::CreateCopy(C, TemplArgs.data(),
1787 ClassTemplateSpecializationDecl::SpecializedPartialSpecialization *PS
1788 = new (C) ClassTemplateSpecializationDecl::
1789 SpecializedPartialSpecialization();
1790 PS->PartialSpecialization
1791 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
1792 PS->TemplateArgs = ArgList;
1793 D->SpecializedTemplate = PS;
1797 SmallVector<TemplateArgument, 8> TemplArgs;
1798 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
1799 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs.data(),
1801 D->PointOfInstantiation = ReadSourceLocation(Record, Idx);
1802 D->SpecializationKind = (TemplateSpecializationKind)Record[Idx++];
1804 bool writtenAsCanonicalDecl = Record[Idx++];
1805 if (writtenAsCanonicalDecl) {
1806 ClassTemplateDecl *CanonPattern = ReadDeclAs<ClassTemplateDecl>(Record,Idx);
1807 if (D->isCanonicalDecl()) { // It's kept in the folding set.
1808 // Set this as, or find, the canonical declaration for this specialization
1809 ClassTemplateSpecializationDecl *CanonSpec;
1810 if (ClassTemplatePartialSpecializationDecl *Partial =
1811 dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
1812 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
1813 .GetOrInsertNode(Partial);
1816 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
1818 // If there was already a canonical specialization, merge into it.
1819 if (CanonSpec != D) {
1820 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
1822 // This declaration might be a definition. Merge with any existing
1824 if (auto *DDD = D->DefinitionData.getNotUpdated()) {
1825 if (auto *CanonDD = CanonSpec->DefinitionData.getNotUpdated()) {
1826 MergeDefinitionData(CanonSpec, *DDD);
1827 Reader.PendingDefinitions.erase(D);
1828 Reader.MergedDeclContexts.insert(
1829 std::make_pair(D, CanonDD->Definition));
1830 D->IsCompleteDefinition = false;
1832 CanonSpec->DefinitionData = D->DefinitionData;
1835 D->DefinitionData = CanonSpec->DefinitionData;
1841 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo(Record, Idx)) {
1842 ClassTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo
1843 = new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
1844 ExplicitInfo->TypeAsWritten = TyInfo;
1845 ExplicitInfo->ExternLoc = ReadSourceLocation(Record, Idx);
1846 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation(Record, Idx);
1847 D->ExplicitInfo = ExplicitInfo;
1853 void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
1854 ClassTemplatePartialSpecializationDecl *D) {
1855 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
1857 D->TemplateParams = Reader.ReadTemplateParameterList(F, Record, Idx);
1858 D->ArgsAsWritten = Reader.ReadASTTemplateArgumentListInfo(F, Record, Idx);
1860 // These are read/set from/to the first declaration.
1861 if (ThisDeclID == Redecl.getFirstID()) {
1862 D->InstantiatedFromMember.setPointer(
1863 ReadDeclAs<ClassTemplatePartialSpecializationDecl>(Record, Idx));
1864 D->InstantiatedFromMember.setInt(Record[Idx++]);
1868 void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
1869 ClassScopeFunctionSpecializationDecl *D) {
1871 D->Specialization = ReadDeclAs<CXXMethodDecl>(Record, Idx);
1874 void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1875 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
1877 if (ThisDeclID == Redecl.getFirstID()) {
1878 // This FunctionTemplateDecl owns a CommonPtr; read it.
1880 // Read the function specialization declaration IDs. The specializations
1881 // themselves will be loaded if they're needed.
1882 if (unsigned NumSpecs = Record[Idx++]) {
1883 // FIXME: Append specializations!
1884 FunctionTemplateDecl::Common *CommonPtr = D->getCommonPtr();
1885 CommonPtr->LazySpecializations = new (Reader.getContext())
1886 serialization::DeclID[NumSpecs + 1];
1887 CommonPtr->LazySpecializations[0] = NumSpecs;
1888 for (unsigned I = 0; I != NumSpecs; ++I)
1889 CommonPtr->LazySpecializations[I + 1] = ReadDeclID(Record, Idx);
1894 /// TODO: Unify with ClassTemplateSpecializationDecl version?
1895 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
1896 /// VarTemplate(Partial)SpecializationDecl with a new data
1897 /// structure Template(Partial)SpecializationDecl, and
1898 /// using Template(Partial)SpecializationDecl as input type.
1899 ASTDeclReader::RedeclarableResult
1900 ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
1901 VarTemplateSpecializationDecl *D) {
1902 RedeclarableResult Redecl = VisitVarDeclImpl(D);
1904 ASTContext &C = Reader.getContext();
1905 if (Decl *InstD = ReadDecl(Record, Idx)) {
1906 if (VarTemplateDecl *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
1907 D->SpecializedTemplate = VTD;
1909 SmallVector<TemplateArgument, 8> TemplArgs;
1910 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
1911 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
1912 C, TemplArgs.data(), TemplArgs.size());
1913 VarTemplateSpecializationDecl::SpecializedPartialSpecialization *PS =
1915 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
1916 PS->PartialSpecialization =
1917 cast<VarTemplatePartialSpecializationDecl>(InstD);
1918 PS->TemplateArgs = ArgList;
1919 D->SpecializedTemplate = PS;
1924 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo(Record, Idx)) {
1925 VarTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo =
1926 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
1927 ExplicitInfo->TypeAsWritten = TyInfo;
1928 ExplicitInfo->ExternLoc = ReadSourceLocation(Record, Idx);
1929 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation(Record, Idx);
1930 D->ExplicitInfo = ExplicitInfo;
1933 SmallVector<TemplateArgument, 8> TemplArgs;
1934 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
1936 TemplateArgumentList::CreateCopy(C, TemplArgs.data(), TemplArgs.size());
1937 D->PointOfInstantiation = ReadSourceLocation(Record, Idx);
1938 D->SpecializationKind = (TemplateSpecializationKind)Record[Idx++];
1940 bool writtenAsCanonicalDecl = Record[Idx++];
1941 if (writtenAsCanonicalDecl) {
1942 VarTemplateDecl *CanonPattern = ReadDeclAs<VarTemplateDecl>(Record, Idx);
1943 if (D->isCanonicalDecl()) { // It's kept in the folding set.
1944 if (VarTemplatePartialSpecializationDecl *Partial =
1945 dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
1946 CanonPattern->getCommonPtr()->PartialSpecializations
1947 .GetOrInsertNode(Partial);
1949 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
1957 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
1958 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
1959 /// VarTemplate(Partial)SpecializationDecl with a new data
1960 /// structure Template(Partial)SpecializationDecl, and
1961 /// using Template(Partial)SpecializationDecl as input type.
1962 void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
1963 VarTemplatePartialSpecializationDecl *D) {
1964 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
1966 D->TemplateParams = Reader.ReadTemplateParameterList(F, Record, Idx);
1967 D->ArgsAsWritten = Reader.ReadASTTemplateArgumentListInfo(F, Record, Idx);
1969 // These are read/set from/to the first declaration.
1970 if (ThisDeclID == Redecl.getFirstID()) {
1971 D->InstantiatedFromMember.setPointer(
1972 ReadDeclAs<VarTemplatePartialSpecializationDecl>(Record, Idx));
1973 D->InstantiatedFromMember.setInt(Record[Idx++]);
1977 void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
1980 D->setDeclaredWithTypename(Record[Idx++]);
1982 bool Inherited = Record[Idx++];
1983 TypeSourceInfo *DefArg = GetTypeSourceInfo(Record, Idx);
1984 D->setDefaultArgument(DefArg, Inherited);
1987 void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
1988 VisitDeclaratorDecl(D);
1989 // TemplateParmPosition.
1990 D->setDepth(Record[Idx++]);
1991 D->setPosition(Record[Idx++]);
1992 if (D->isExpandedParameterPack()) {
1993 void **Data = reinterpret_cast<void **>(D + 1);
1994 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
1995 Data[2*I] = Reader.readType(F, Record, Idx).getAsOpaquePtr();
1996 Data[2*I + 1] = GetTypeSourceInfo(Record, Idx);
1999 // Rest of NonTypeTemplateParmDecl.
2000 D->ParameterPack = Record[Idx++];
2001 if (Record[Idx++]) {
2002 Expr *DefArg = Reader.ReadExpr(F);
2003 bool Inherited = Record[Idx++];
2004 D->setDefaultArgument(DefArg, Inherited);
2009 void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2010 VisitTemplateDecl(D);
2011 // TemplateParmPosition.
2012 D->setDepth(Record[Idx++]);
2013 D->setPosition(Record[Idx++]);
2014 if (D->isExpandedParameterPack()) {
2015 void **Data = reinterpret_cast<void **>(D + 1);
2016 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2018 Data[I] = Reader.ReadTemplateParameterList(F, Record, Idx);
2020 // Rest of TemplateTemplateParmDecl.
2021 TemplateArgumentLoc Arg = Reader.ReadTemplateArgumentLoc(F, Record, Idx);
2022 bool IsInherited = Record[Idx++];
2023 D->setDefaultArgument(Arg, IsInherited);
2024 D->ParameterPack = Record[Idx++];
2028 void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2029 VisitRedeclarableTemplateDecl(D);
2032 void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2034 D->AssertExprAndFailed.setPointer(Reader.ReadExpr(F));
2035 D->AssertExprAndFailed.setInt(Record[Idx++]);
2036 D->Message = cast<StringLiteral>(Reader.ReadExpr(F));
2037 D->RParenLoc = ReadSourceLocation(Record, Idx);
2040 void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2044 std::pair<uint64_t, uint64_t>
2045 ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2046 uint64_t LexicalOffset = Record[Idx++];
2047 uint64_t VisibleOffset = Record[Idx++];
2048 return std::make_pair(LexicalOffset, VisibleOffset);
2051 template <typename T>
2052 ASTDeclReader::RedeclarableResult
2053 ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2054 DeclID FirstDeclID = ReadDeclID(Record, Idx);
2056 // 0 indicates that this declaration was the only declaration of its entity,
2057 // and is used for space optimization.
2058 if (FirstDeclID == 0)
2059 FirstDeclID = ThisDeclID;
2061 T *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2062 if (FirstDecl != D) {
2063 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2064 // We temporarily set the first (canonical) declaration as the previous one
2065 // which is the one that matters and mark the real previous DeclID to be
2066 // loaded & attached later on.
2067 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2070 // Note that this declaration has been deserialized.
2071 Reader.RedeclsDeserialized.insert(static_cast<T *>(D));
2073 // The result structure takes care to note that we need to load the
2074 // other declaration chains for this ID.
2075 return RedeclarableResult(Reader, FirstDeclID,
2076 static_cast<T *>(D)->getKind());
2079 /// \brief Attempts to merge the given declaration (D) with another declaration
2080 /// of the same entity.
2081 template<typename T>
2082 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2083 RedeclarableResult &Redecl,
2084 DeclID TemplatePatternID) {
2085 T *D = static_cast<T*>(DBase);
2086 T *DCanon = D->getCanonicalDecl();
2088 // IDs < NUM_PREDEF_DECL_IDS are not loaded from an AST file.
2089 Redecl.getFirstID() >= NUM_PREDEF_DECL_IDS &&
2090 (!Reader.getContext().getLangOpts().Modules ||
2091 Reader.getOwningModuleFile(DCanon) == Reader.getOwningModuleFile(D))) {
2092 // All redeclarations between this declaration and its originally-canonical
2093 // declaration get pulled in when we load DCanon; we don't need to
2094 // perform any more merging now.
2098 // If modules are not available, there is no reason to perform this merge.
2099 if (!Reader.getContext().getLangOpts().Modules)
2102 if (FindExistingResult ExistingRes = findExisting(D))
2103 if (T *Existing = ExistingRes)
2104 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2107 /// \brief "Cast" to type T, asserting if we don't have an implicit conversion.
2108 /// We use this to put code in a template that will only be valid for certain
2110 template<typename T> static T assert_cast(T t) { return t; }
2111 template<typename T> static T assert_cast(...) {
2112 llvm_unreachable("bad assert_cast");
2115 /// \brief Merge together the pattern declarations from two template
2117 void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2118 RedeclarableTemplateDecl *Existing,
2120 auto *DPattern = D->getTemplatedDecl();
2121 auto *ExistingPattern = Existing->getTemplatedDecl();
2122 RedeclarableResult Result(Reader, DPattern->getCanonicalDecl()->getGlobalID(),
2123 DPattern->getKind());
2124 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2125 // Merge with any existing definition.
2126 // FIXME: This is duplicated in several places. Refactor.
2127 auto *ExistingClass =
2128 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2129 if (auto *DDD = DClass->DefinitionData.getNotUpdated()) {
2130 if (auto *ExistingDD = ExistingClass->DefinitionData.getNotUpdated()) {
2131 MergeDefinitionData(ExistingClass, *DDD);
2132 Reader.PendingDefinitions.erase(DClass);
2133 Reader.MergedDeclContexts.insert(
2134 std::make_pair(DClass, ExistingDD->Definition));
2135 DClass->IsCompleteDefinition = false;
2137 ExistingClass->DefinitionData = DClass->DefinitionData;
2140 DClass->DefinitionData = ExistingClass->DefinitionData;
2142 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2145 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2146 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2148 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2149 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2150 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2151 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2153 llvm_unreachable("merged an unknown kind of redeclarable template");
2156 /// \brief Attempts to merge the given declaration (D) with another declaration
2157 /// of the same entity.
2158 template<typename T>
2159 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2160 RedeclarableResult &Redecl,
2161 DeclID TemplatePatternID) {
2162 T *D = static_cast<T*>(DBase);
2163 T *ExistingCanon = Existing->getCanonicalDecl();
2164 T *DCanon = D->getCanonicalDecl();
2165 if (ExistingCanon != DCanon) {
2166 assert(DCanon->getGlobalID() == Redecl.getFirstID());
2168 // Have our redeclaration link point back at the canonical declaration
2169 // of the existing declaration, so that this declaration has the
2170 // appropriate canonical declaration.
2171 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2173 // When we merge a namespace, update its pointer to the first namespace.
2174 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2175 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2176 assert_cast<NamespaceDecl*>(ExistingCanon));
2178 // When we merge a template, merge its pattern.
2179 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2180 mergeTemplatePattern(
2181 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2184 // If this declaration was the canonical declaration, make a note of
2185 // that. We accept the linear algorithm here because the number of
2186 // unique canonical declarations of an entity should always be tiny.
2188 SmallVectorImpl<DeclID> &Merged = Reader.MergedDecls[ExistingCanon];
2189 if (std::find(Merged.begin(), Merged.end(), Redecl.getFirstID())
2191 Merged.push_back(Redecl.getFirstID());
2196 /// \brief Attempts to merge the given declaration (D) with another declaration
2197 /// of the same entity, for the case where the entity is not actually
2198 /// redeclarable. This happens, for instance, when merging the fields of
2199 /// identical class definitions from two different modules.
2200 template<typename T>
2201 void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2202 // If modules are not available, there is no reason to perform this merge.
2203 if (!Reader.getContext().getLangOpts().Modules)
2206 // ODR-based merging is only performed in C++. In C, identically-named things
2207 // in different translation units are not redeclarations (but may still have
2208 // compatible types).
2209 if (!Reader.getContext().getLangOpts().CPlusPlus)
2212 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2213 if (T *Existing = ExistingRes)
2214 Reader.Context.setPrimaryMergedDecl(static_cast<T*>(D),
2215 Existing->getCanonicalDecl());
2218 void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2220 unsigned NumVars = D->varlist_size();
2221 SmallVector<Expr *, 16> Vars;
2222 Vars.reserve(NumVars);
2223 for (unsigned i = 0; i != NumVars; ++i) {
2224 Vars.push_back(Reader.ReadExpr(F));
2229 //===----------------------------------------------------------------------===//
2230 // Attribute Reading
2231 //===----------------------------------------------------------------------===//
2233 /// \brief Reads attributes from the current stream position.
2234 void ASTReader::ReadAttributes(ModuleFile &F, AttrVec &Attrs,
2235 const RecordData &Record, unsigned &Idx) {
2236 for (unsigned i = 0, e = Record[Idx++]; i != e; ++i) {
2237 Attr *New = nullptr;
2238 attr::Kind Kind = (attr::Kind)Record[Idx++];
2239 SourceRange Range = ReadSourceRange(F, Record, Idx);
2241 #include "clang/Serialization/AttrPCHRead.inc"
2243 assert(New && "Unable to decode attribute?");
2244 Attrs.push_back(New);
2248 //===----------------------------------------------------------------------===//
2249 // ASTReader Implementation
2250 //===----------------------------------------------------------------------===//
2252 /// \brief Note that we have loaded the declaration with the given
2255 /// This routine notes that this declaration has already been loaded,
2256 /// so that future GetDecl calls will return this declaration rather
2257 /// than trying to load a new declaration.
2258 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2259 assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2260 DeclsLoaded[Index] = D;
2264 /// \brief Determine whether the consumer will be interested in seeing
2265 /// this declaration (via HandleTopLevelDecl).
2267 /// This routine should return true for anything that might affect
2268 /// code generation, e.g., inline function definitions, Objective-C
2269 /// declarations with metadata, etc.
2270 static bool isConsumerInterestedIn(Decl *D, bool HasBody) {
2271 // An ObjCMethodDecl is never considered as "interesting" because its
2272 // implementation container always is.
2274 if (isa<FileScopeAsmDecl>(D) ||
2275 isa<ObjCProtocolDecl>(D) ||
2276 isa<ObjCImplDecl>(D) ||
2277 isa<ImportDecl>(D) ||
2278 isa<OMPThreadPrivateDecl>(D))
2280 if (VarDecl *Var = dyn_cast<VarDecl>(D))
2281 return Var->isFileVarDecl() &&
2282 Var->isThisDeclarationADefinition() == VarDecl::Definition;
2283 if (FunctionDecl *Func = dyn_cast<FunctionDecl>(D))
2284 return Func->doesThisDeclarationHaveABody() || HasBody;
2289 /// \brief Get the correct cursor and offset for loading a declaration.
2290 ASTReader::RecordLocation
2291 ASTReader::DeclCursorForID(DeclID ID, unsigned &RawLocation) {
2292 // See if there's an override.
2293 DeclReplacementMap::iterator It = ReplacedDecls.find(ID);
2294 if (It != ReplacedDecls.end()) {
2295 RawLocation = It->second.RawLoc;
2296 return RecordLocation(It->second.Mod, It->second.Offset);
2299 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2300 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2301 ModuleFile *M = I->second;
2303 DOffs = M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2304 RawLocation = DOffs.Loc;
2305 return RecordLocation(M, DOffs.BitOffset);
2308 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2309 ContinuousRangeMap<uint64_t, ModuleFile*, 4>::iterator I
2310 = GlobalBitOffsetsMap.find(GlobalOffset);
2312 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2313 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2316 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2317 return LocalOffset + M.GlobalBitOffset;
2320 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2321 const TemplateParameterList *Y);
2323 /// \brief Determine whether two template parameters are similar enough
2324 /// that they may be used in declarations of the same template.
2325 static bool isSameTemplateParameter(const NamedDecl *X,
2326 const NamedDecl *Y) {
2327 if (X->getKind() != Y->getKind())
2330 if (const TemplateTypeParmDecl *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2331 const TemplateTypeParmDecl *TY = cast<TemplateTypeParmDecl>(Y);
2332 return TX->isParameterPack() == TY->isParameterPack();
2335 if (const NonTypeTemplateParmDecl *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2336 const NonTypeTemplateParmDecl *TY = cast<NonTypeTemplateParmDecl>(Y);
2337 return TX->isParameterPack() == TY->isParameterPack() &&
2338 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2341 const TemplateTemplateParmDecl *TX = cast<TemplateTemplateParmDecl>(X);
2342 const TemplateTemplateParmDecl *TY = cast<TemplateTemplateParmDecl>(Y);
2343 return TX->isParameterPack() == TY->isParameterPack() &&
2344 isSameTemplateParameterList(TX->getTemplateParameters(),
2345 TY->getTemplateParameters());
2348 static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2349 if (auto *NS = X->getAsNamespace())
2351 if (auto *NAS = X->getAsNamespaceAlias())
2352 return NAS->getNamespace();
2356 static bool isSameQualifier(const NestedNameSpecifier *X,
2357 const NestedNameSpecifier *Y) {
2358 if (auto *NSX = getNamespace(X)) {
2359 auto *NSY = getNamespace(Y);
2360 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2362 } else if (X->getKind() != Y->getKind())
2365 // FIXME: For namespaces and types, we're permitted to check that the entity
2366 // is named via the same tokens. We should probably do so.
2367 switch (X->getKind()) {
2368 case NestedNameSpecifier::Identifier:
2369 if (X->getAsIdentifier() != Y->getAsIdentifier())
2372 case NestedNameSpecifier::Namespace:
2373 case NestedNameSpecifier::NamespaceAlias:
2374 // We've already checked that we named the same namespace.
2376 case NestedNameSpecifier::TypeSpec:
2377 case NestedNameSpecifier::TypeSpecWithTemplate:
2378 if (X->getAsType()->getCanonicalTypeInternal() !=
2379 Y->getAsType()->getCanonicalTypeInternal())
2382 case NestedNameSpecifier::Global:
2383 case NestedNameSpecifier::Super:
2387 // Recurse into earlier portion of NNS, if any.
2388 auto *PX = X->getPrefix();
2389 auto *PY = Y->getPrefix();
2391 return isSameQualifier(PX, PY);
2395 /// \brief Determine whether two template parameter lists are similar enough
2396 /// that they may be used in declarations of the same template.
2397 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2398 const TemplateParameterList *Y) {
2399 if (X->size() != Y->size())
2402 for (unsigned I = 0, N = X->size(); I != N; ++I)
2403 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2409 /// \brief Determine whether the two declarations refer to the same entity.
2410 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2411 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2416 // Must be in the same context.
2417 if (!X->getDeclContext()->getRedeclContext()->Equals(
2418 Y->getDeclContext()->getRedeclContext()))
2421 // Two typedefs refer to the same entity if they have the same underlying
2423 if (TypedefNameDecl *TypedefX = dyn_cast<TypedefNameDecl>(X))
2424 if (TypedefNameDecl *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2425 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2426 TypedefY->getUnderlyingType());
2428 // Must have the same kind.
2429 if (X->getKind() != Y->getKind())
2432 // Objective-C classes and protocols with the same name always match.
2433 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2436 if (isa<ClassTemplateSpecializationDecl>(X)) {
2437 // No need to handle these here: we merge them when adding them to the
2442 // Compatible tags match.
2443 if (TagDecl *TagX = dyn_cast<TagDecl>(X)) {
2444 TagDecl *TagY = cast<TagDecl>(Y);
2445 return (TagX->getTagKind() == TagY->getTagKind()) ||
2446 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2447 TagX->getTagKind() == TTK_Interface) &&
2448 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2449 TagY->getTagKind() == TTK_Interface));
2452 // Functions with the same type and linkage match.
2453 // FIXME: This needs to cope with merging of prototyped/non-prototyped
2455 if (FunctionDecl *FuncX = dyn_cast<FunctionDecl>(X)) {
2456 FunctionDecl *FuncY = cast<FunctionDecl>(Y);
2457 return (FuncX->getLinkageInternal() == FuncY->getLinkageInternal()) &&
2458 FuncX->getASTContext().hasSameType(FuncX->getType(), FuncY->getType());
2461 // Variables with the same type and linkage match.
2462 if (VarDecl *VarX = dyn_cast<VarDecl>(X)) {
2463 VarDecl *VarY = cast<VarDecl>(Y);
2464 return (VarX->getLinkageInternal() == VarY->getLinkageInternal()) &&
2465 VarX->getASTContext().hasSameType(VarX->getType(), VarY->getType());
2468 // Namespaces with the same name and inlinedness match.
2469 if (NamespaceDecl *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
2470 NamespaceDecl *NamespaceY = cast<NamespaceDecl>(Y);
2471 return NamespaceX->isInline() == NamespaceY->isInline();
2474 // Identical template names and kinds match if their template parameter lists
2475 // and patterns match.
2476 if (TemplateDecl *TemplateX = dyn_cast<TemplateDecl>(X)) {
2477 TemplateDecl *TemplateY = cast<TemplateDecl>(Y);
2478 return isSameEntity(TemplateX->getTemplatedDecl(),
2479 TemplateY->getTemplatedDecl()) &&
2480 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
2481 TemplateY->getTemplateParameters());
2484 // Fields with the same name and the same type match.
2485 if (FieldDecl *FDX = dyn_cast<FieldDecl>(X)) {
2486 FieldDecl *FDY = cast<FieldDecl>(Y);
2487 // FIXME: Also check the bitwidth is odr-equivalent, if any.
2488 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
2491 // Enumerators with the same name match.
2492 if (isa<EnumConstantDecl>(X))
2493 // FIXME: Also check the value is odr-equivalent.
2496 // Using shadow declarations with the same target match.
2497 if (UsingShadowDecl *USX = dyn_cast<UsingShadowDecl>(X)) {
2498 UsingShadowDecl *USY = cast<UsingShadowDecl>(Y);
2499 return USX->getTargetDecl() == USY->getTargetDecl();
2502 // Using declarations with the same qualifier match. (We already know that
2503 // the name matches.)
2504 if (auto *UX = dyn_cast<UsingDecl>(X)) {
2505 auto *UY = cast<UsingDecl>(Y);
2506 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2507 UX->hasTypename() == UY->hasTypename() &&
2508 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2510 if (auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
2511 auto *UY = cast<UnresolvedUsingValueDecl>(Y);
2512 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2513 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2515 if (auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
2516 return isSameQualifier(
2518 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
2520 // Namespace alias definitions with the same target match.
2521 if (auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
2522 auto *NAY = cast<NamespaceAliasDecl>(Y);
2523 return NAX->getNamespace()->Equals(NAY->getNamespace());
2526 // FIXME: Many other cases to implement.
2530 /// Find the context in which we should search for previous declarations when
2531 /// looking for declarations to merge.
2532 static DeclContext *getPrimaryContextForMerging(DeclContext *DC) {
2533 if (NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC))
2534 return ND->getOriginalNamespace();
2536 // There is one tricky case here: if DC is a class with no definition, then
2537 // we're merging a declaration whose definition is added by an update record,
2538 // but we've not yet loaded that update record. In this case, we use the
2539 // canonical declaration for merging until we get a real definition.
2540 // FIXME: When we add a definition, we may need to move the partial lookup
2541 // information from the canonical declaration onto the chosen definition.
2542 if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC))
2543 return RD->getPrimaryContext();
2545 if (EnumDecl *ED = dyn_cast<EnumDecl>(DC))
2546 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
2552 ASTDeclReader::FindExistingResult::~FindExistingResult() {
2553 if (!AddResult || Existing)
2556 DeclarationName Name = New->getDeclName();
2557 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2558 if (TypedefNameForLinkage) {
2559 Reader.ImportedTypedefNamesForLinkage.insert(
2560 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
2562 assert(needsAnonymousDeclarationNumber(New));
2563 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
2564 AnonymousDeclNumber, New);
2565 } else if (DC->isTranslationUnit() && Reader.SemaObj) {
2566 Reader.SemaObj->IdResolver.tryAddTopLevelDecl(New, Name);
2567 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(DC)) {
2568 // Add the declaration to its redeclaration context so later merging
2569 // lookups will find it.
2570 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
2574 /// Find the declaration that should be merged into, given the declaration found
2575 /// by name lookup. If we're merging an anonymous declaration within a typedef,
2576 /// we need a matching typedef, and we merge with the type inside it.
2577 static NamedDecl *getDeclForMerging(NamedDecl *Found,
2578 bool IsTypedefNameForLinkage) {
2579 if (!IsTypedefNameForLinkage)
2582 // If we found a typedef declaration that gives a name to some other
2583 // declaration, then we want that inner declaration. Declarations from
2584 // AST files are handled via ImportedTypedefNamesForLinkage.
2585 if (Found->isFromASTFile()) return 0;
2586 if (auto *TND = dyn_cast<TypedefNameDecl>(Found)) {
2587 if (auto *TT = TND->getTypeSourceInfo()->getType()->getAs<TagType>())
2588 if (TT->getDecl()->getTypedefNameForAnonDecl() == TND)
2589 return TT->getDecl();
2595 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
2598 // If the lexical context has been merged, look into the now-canonical
2600 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
2603 // If we've seen this before, return the canonical declaration.
2604 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
2605 if (Index < Previous.size() && Previous[Index])
2606 return Previous[Index];
2608 // If this is the first time, but we have parsed a declaration of the context,
2609 // build the anonymous declaration list from the parsed declaration.
2610 if (!cast<Decl>(DC)->isFromASTFile()) {
2612 for (Decl *LexicalD : DC->decls()) {
2613 auto *ND = dyn_cast<NamedDecl>(LexicalD);
2614 if (!ND || !needsAnonymousDeclarationNumber(ND))
2616 if (Previous.size() == Index)
2617 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
2619 Previous[Index] = cast<NamedDecl>(ND->getCanonicalDecl());
2624 return Index < Previous.size() ? Previous[Index] : nullptr;
2627 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
2628 DeclContext *DC, unsigned Index,
2630 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
2633 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
2634 if (Index >= Previous.size())
2635 Previous.resize(Index + 1);
2636 if (!Previous[Index])
2637 Previous[Index] = D;
2640 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
2641 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
2644 if (!Name && !needsAnonymousDeclarationNumber(D)) {
2645 // Don't bother trying to find unnamed declarations that are in
2646 // unmergeable contexts.
2647 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
2648 AnonymousDeclNumber, TypedefNameForLinkage);
2649 // FIXME: We may still need to pull in the redeclaration chain; there can
2650 // be redeclarations via 'decltype'.
2655 // FIXME: Bail out for non-canonical declarations. We will have performed any
2656 // necessary merging already.
2658 DeclContext *DC = D->getDeclContext()->getRedeclContext();
2659 if (TypedefNameForLinkage) {
2660 auto It = Reader.ImportedTypedefNamesForLinkage.find(
2661 std::make_pair(DC, TypedefNameForLinkage));
2662 if (It != Reader.ImportedTypedefNamesForLinkage.end())
2663 if (isSameEntity(It->second, D))
2664 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
2665 TypedefNameForLinkage);
2666 // Go on to check in other places in case an existing typedef name
2667 // was not imported.
2671 // This is an anonymous declaration that we may need to merge. Look it up
2672 // in its context by number.
2673 assert(needsAnonymousDeclarationNumber(D));
2674 if (auto *Existing = getAnonymousDeclForMerging(
2675 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
2676 if (isSameEntity(Existing, D))
2677 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
2678 TypedefNameForLinkage);
2679 } else if (DC->isTranslationUnit() && Reader.SemaObj) {
2680 IdentifierResolver &IdResolver = Reader.SemaObj->IdResolver;
2682 // Temporarily consider the identifier to be up-to-date. We don't want to
2683 // cause additional lookups here.
2684 class UpToDateIdentifierRAII {
2689 explicit UpToDateIdentifierRAII(IdentifierInfo *II)
2690 : II(II), WasOutToDate(false)
2693 WasOutToDate = II->isOutOfDate();
2695 II->setOutOfDate(false);
2699 ~UpToDateIdentifierRAII() {
2701 II->setOutOfDate(true);
2703 } UpToDate(Name.getAsIdentifierInfo());
2705 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
2706 IEnd = IdResolver.end();
2708 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
2709 if (isSameEntity(Existing, D))
2710 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
2711 TypedefNameForLinkage);
2713 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(DC)) {
2714 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
2715 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
2716 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
2717 if (isSameEntity(Existing, D))
2718 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
2719 TypedefNameForLinkage);
2722 // Not in a mergeable context.
2723 return FindExistingResult(Reader);
2726 // If this declaration is from a merged context, make a note that we need to
2727 // check that the canonical definition of that context contains the decl.
2729 // FIXME: We should do something similar if we merge two definitions of the
2730 // same template specialization into the same CXXRecordDecl.
2731 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
2732 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
2733 MergedDCIt->second == D->getDeclContext())
2734 Reader.PendingOdrMergeChecks.push_back(D);
2736 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
2737 AnonymousDeclNumber, TypedefNameForLinkage);
2740 template<typename DeclT>
2741 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
2742 Redeclarable<DeclT> *D,
2744 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
2748 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
2749 Redeclarable<FunctionDecl> *D,
2751 FunctionDecl *FD = static_cast<FunctionDecl*>(D);
2752 FunctionDecl *PrevFD = cast<FunctionDecl>(Previous);
2754 FD->RedeclLink.setPrevious(PrevFD);
2756 // If the previous declaration is an inline function declaration, then this
2757 // declaration is too.
2758 if (PrevFD->IsInline != FD->IsInline) {
2759 // FIXME: [dcl.fct.spec]p4:
2760 // If a function with external linkage is declared inline in one
2761 // translation unit, it shall be declared inline in all translation
2762 // units in which it appears.
2764 // Be careful of this case:
2767 // template<typename T> struct X { void f(); };
2768 // template<typename T> inline void X<T>::f() {}
2770 // module B instantiates the declaration of X<int>::f
2771 // module C instantiates the definition of X<int>::f
2773 // If module B and C are merged, we do not have a violation of this rule.
2774 FD->IsInline = true;
2777 // If this declaration has an unresolved exception specification but the
2778 // previous declaration had a resolved one, resolve the exception
2779 // specification now.
2780 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
2781 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
2782 if (FPT && PrevFPT &&
2783 isUnresolvedExceptionSpec(FPT->getExceptionSpecType()) &&
2784 !isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType())) {
2785 Reader.Context.adjustExceptionSpec(
2786 FD, PrevFPT->getExtProtoInfo().ExceptionSpec);
2790 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
2791 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
2794 void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
2796 assert(D && Previous);
2798 switch (D->getKind()) {
2799 #define ABSTRACT_DECL(TYPE)
2800 #define DECL(TYPE, BASE) \
2802 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous); \
2804 #include "clang/AST/DeclNodes.inc"
2807 // If the declaration was visible in one module, a redeclaration of it in
2808 // another module remains visible even if it wouldn't be visible by itself.
2810 // FIXME: In this case, the declaration should only be visible if a module
2811 // that makes it visible has been imported.
2812 D->IdentifierNamespace |=
2813 Previous->IdentifierNamespace &
2814 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
2816 // If the previous declaration is marked as used, then this declaration should
2822 template<typename DeclT>
2823 void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
2824 D->RedeclLink.setLatest(cast<DeclT>(Latest));
2826 void ASTDeclReader::attachLatestDeclImpl(...) {
2827 llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
2830 void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
2831 assert(D && Latest);
2833 switch (D->getKind()) {
2834 #define ABSTRACT_DECL(TYPE)
2835 #define DECL(TYPE, BASE) \
2837 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
2839 #include "clang/AST/DeclNodes.inc"
2843 template<typename DeclT>
2844 void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
2845 D->RedeclLink.markIncomplete();
2847 void ASTDeclReader::markIncompleteDeclChainImpl(...) {
2848 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
2851 void ASTReader::markIncompleteDeclChain(Decl *D) {
2852 switch (D->getKind()) {
2853 #define ABSTRACT_DECL(TYPE)
2854 #define DECL(TYPE, BASE) \
2856 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
2858 #include "clang/AST/DeclNodes.inc"
2862 ASTReader::MergedDeclsMap::iterator
2863 ASTReader::combineStoredMergedDecls(Decl *Canon, GlobalDeclID CanonID) {
2864 // If we don't have any stored merged declarations, just look in the
2865 // merged declarations set.
2866 StoredMergedDeclsMap::iterator StoredPos = StoredMergedDecls.find(CanonID);
2867 if (StoredPos == StoredMergedDecls.end())
2868 return MergedDecls.find(Canon);
2870 // Append the stored merged declarations to the merged declarations set.
2871 MergedDeclsMap::iterator Pos = MergedDecls.find(Canon);
2872 if (Pos == MergedDecls.end())
2873 Pos = MergedDecls.insert(std::make_pair(Canon,
2874 SmallVector<DeclID, 2>())).first;
2875 Pos->second.append(StoredPos->second.begin(), StoredPos->second.end());
2876 StoredMergedDecls.erase(StoredPos);
2878 // Sort and uniquify the set of merged declarations.
2879 llvm::array_pod_sort(Pos->second.begin(), Pos->second.end());
2880 Pos->second.erase(std::unique(Pos->second.begin(), Pos->second.end()),
2885 /// \brief Read the declaration at the given offset from the AST file.
2886 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
2887 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
2888 unsigned RawLocation = 0;
2889 RecordLocation Loc = DeclCursorForID(ID, RawLocation);
2890 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
2891 // Keep track of where we are in the stream, then jump back there
2892 // after reading this declaration.
2893 SavedStreamPosition SavedPosition(DeclsCursor);
2895 ReadingKindTracker ReadingKind(Read_Decl, *this);
2897 // Note that we are loading a declaration record.
2898 Deserializing ADecl(this);
2900 DeclsCursor.JumpToBit(Loc.Offset);
2902 unsigned Code = DeclsCursor.ReadCode();
2904 ASTDeclReader Reader(*this, *Loc.F, ID, RawLocation, Record,Idx);
2907 switch ((DeclCode)DeclsCursor.readRecord(Code, Record)) {
2908 case DECL_CONTEXT_LEXICAL:
2909 case DECL_CONTEXT_VISIBLE:
2910 llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
2912 D = TypedefDecl::CreateDeserialized(Context, ID);
2914 case DECL_TYPEALIAS:
2915 D = TypeAliasDecl::CreateDeserialized(Context, ID);
2918 D = EnumDecl::CreateDeserialized(Context, ID);
2921 D = RecordDecl::CreateDeserialized(Context, ID);
2923 case DECL_ENUM_CONSTANT:
2924 D = EnumConstantDecl::CreateDeserialized(Context, ID);
2927 D = FunctionDecl::CreateDeserialized(Context, ID);
2929 case DECL_LINKAGE_SPEC:
2930 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
2933 D = LabelDecl::CreateDeserialized(Context, ID);
2935 case DECL_NAMESPACE:
2936 D = NamespaceDecl::CreateDeserialized(Context, ID);
2938 case DECL_NAMESPACE_ALIAS:
2939 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
2942 D = UsingDecl::CreateDeserialized(Context, ID);
2944 case DECL_USING_SHADOW:
2945 D = UsingShadowDecl::CreateDeserialized(Context, ID);
2947 case DECL_USING_DIRECTIVE:
2948 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
2950 case DECL_UNRESOLVED_USING_VALUE:
2951 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
2953 case DECL_UNRESOLVED_USING_TYPENAME:
2954 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
2956 case DECL_CXX_RECORD:
2957 D = CXXRecordDecl::CreateDeserialized(Context, ID);
2959 case DECL_CXX_METHOD:
2960 D = CXXMethodDecl::CreateDeserialized(Context, ID);
2962 case DECL_CXX_CONSTRUCTOR:
2963 D = CXXConstructorDecl::CreateDeserialized(Context, ID);
2965 case DECL_CXX_DESTRUCTOR:
2966 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
2968 case DECL_CXX_CONVERSION:
2969 D = CXXConversionDecl::CreateDeserialized(Context, ID);
2971 case DECL_ACCESS_SPEC:
2972 D = AccessSpecDecl::CreateDeserialized(Context, ID);
2975 D = FriendDecl::CreateDeserialized(Context, ID, Record[Idx++]);
2977 case DECL_FRIEND_TEMPLATE:
2978 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
2980 case DECL_CLASS_TEMPLATE:
2981 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
2983 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
2984 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
2986 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
2987 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
2989 case DECL_VAR_TEMPLATE:
2990 D = VarTemplateDecl::CreateDeserialized(Context, ID);
2992 case DECL_VAR_TEMPLATE_SPECIALIZATION:
2993 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
2995 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
2996 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
2998 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
2999 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3001 case DECL_FUNCTION_TEMPLATE:
3002 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3004 case DECL_TEMPLATE_TYPE_PARM:
3005 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3007 case DECL_NON_TYPE_TEMPLATE_PARM:
3008 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3010 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3011 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID, Record[Idx++]);
3013 case DECL_TEMPLATE_TEMPLATE_PARM:
3014 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3016 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3017 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3020 case DECL_TYPE_ALIAS_TEMPLATE:
3021 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3023 case DECL_STATIC_ASSERT:
3024 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3026 case DECL_OBJC_METHOD:
3027 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3029 case DECL_OBJC_INTERFACE:
3030 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3032 case DECL_OBJC_IVAR:
3033 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3035 case DECL_OBJC_PROTOCOL:
3036 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3038 case DECL_OBJC_AT_DEFS_FIELD:
3039 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3041 case DECL_OBJC_CATEGORY:
3042 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3044 case DECL_OBJC_CATEGORY_IMPL:
3045 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3047 case DECL_OBJC_IMPLEMENTATION:
3048 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3050 case DECL_OBJC_COMPATIBLE_ALIAS:
3051 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3053 case DECL_OBJC_PROPERTY:
3054 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3056 case DECL_OBJC_PROPERTY_IMPL:
3057 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3060 D = FieldDecl::CreateDeserialized(Context, ID);
3062 case DECL_INDIRECTFIELD:
3063 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3066 D = VarDecl::CreateDeserialized(Context, ID);
3068 case DECL_IMPLICIT_PARAM:
3069 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3072 D = ParmVarDecl::CreateDeserialized(Context, ID);
3074 case DECL_FILE_SCOPE_ASM:
3075 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3078 D = BlockDecl::CreateDeserialized(Context, ID);
3080 case DECL_MS_PROPERTY:
3081 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3084 D = CapturedDecl::CreateDeserialized(Context, ID, Record[Idx++]);
3086 case DECL_CXX_BASE_SPECIFIERS:
3087 Error("attempt to read a C++ base-specifier record as a declaration");
3090 // Note: last entry of the ImportDecl record is the number of stored source
3092 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3094 case DECL_OMP_THREADPRIVATE:
3095 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record[Idx++]);
3098 D = EmptyDecl::CreateDeserialized(Context, ID);
3102 assert(D && "Unknown declaration reading AST file");
3103 LoadedDecl(Index, D);
3104 // Set the DeclContext before doing any deserialization, to make sure internal
3105 // calls to Decl::getASTContext() by Decl's methods will find the
3106 // TranslationUnitDecl without crashing.
3107 D->setDeclContext(Context.getTranslationUnitDecl());
3110 // If this declaration is also a declaration context, get the
3111 // offsets for its tables of lexical and visible declarations.
3112 if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
3113 // FIXME: This should really be
3114 // DeclContext *LookupDC = DC->getPrimaryContext();
3115 // but that can walk the redeclaration chain, which might not work yet.
3116 DeclContext *LookupDC = DC;
3117 if (isa<NamespaceDecl>(DC))
3118 LookupDC = DC->getPrimaryContext();
3119 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3120 if (Offsets.first || Offsets.second) {
3121 if (Offsets.first != 0)
3122 DC->setHasExternalLexicalStorage(true);
3123 if (Offsets.second != 0)
3124 LookupDC->setHasExternalVisibleStorage(true);
3125 if (ReadDeclContextStorage(*Loc.F, DeclsCursor, Offsets,
3126 Loc.F->DeclContextInfos[DC]))
3130 // Now add the pending visible updates for this decl context, if it has any.
3131 DeclContextVisibleUpdatesPending::iterator I =
3132 PendingVisibleUpdates.find(ID);
3133 if (I != PendingVisibleUpdates.end()) {
3134 // There are updates. This means the context has external visible
3135 // storage, even if the original stored version didn't.
3136 LookupDC->setHasExternalVisibleStorage(true);
3137 for (const auto &Update : I->second) {
3138 DeclContextInfo &Info = Update.second->DeclContextInfos[DC];
3139 delete Info.NameLookupTableData;
3140 Info.NameLookupTableData = Update.first;
3142 PendingVisibleUpdates.erase(I);
3145 assert(Idx == Record.size());
3147 // Load any relevant update records.
3148 PendingUpdateRecords.push_back(std::make_pair(ID, D));
3150 // Load the categories after recursive loading is finished.
3151 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(D))
3152 if (Class->isThisDeclarationADefinition())
3153 loadObjCCategories(ID, Class);
3155 // If we have deserialized a declaration that has a definition the
3156 // AST consumer might need to know about, queue it.
3157 // We don't pass it to the consumer immediately because we may be in recursive
3158 // loading, and some declarations may still be initializing.
3159 if (isConsumerInterestedIn(D, Reader.hasPendingBody()))
3160 InterestingDecls.push_back(D);
3165 void ASTReader::loadDeclUpdateRecords(serialization::DeclID ID, Decl *D) {
3166 // The declaration may have been modified by files later in the chain.
3167 // If this is the case, read the record containing the updates from each file
3168 // and pass it to ASTDeclReader to make the modifications.
3169 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3170 if (UpdI != DeclUpdateOffsets.end()) {
3171 FileOffsetsTy &UpdateOffsets = UpdI->second;
3172 bool WasInteresting = isConsumerInterestedIn(D, false);
3173 for (FileOffsetsTy::iterator
3174 I = UpdateOffsets.begin(), E = UpdateOffsets.end(); I != E; ++I) {
3175 ModuleFile *F = I->first;
3176 uint64_t Offset = I->second;
3177 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3178 SavedStreamPosition SavedPosition(Cursor);
3179 Cursor.JumpToBit(Offset);
3181 unsigned Code = Cursor.ReadCode();
3182 unsigned RecCode = Cursor.readRecord(Code, Record);
3184 assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3187 ASTDeclReader Reader(*this, *F, ID, 0, Record, Idx);
3188 Reader.UpdateDecl(D, *F, Record);
3190 // We might have made this declaration interesting. If so, remember that
3191 // we need to hand it off to the consumer.
3192 if (!WasInteresting &&
3193 isConsumerInterestedIn(D, Reader.hasPendingBody())) {
3194 InterestingDecls.push_back(D);
3195 WasInteresting = true;
3202 /// \brief Module visitor class that finds all of the redeclarations of a
3204 class RedeclChainVisitor {
3206 SmallVectorImpl<DeclID> &SearchDecls;
3207 llvm::SmallPtrSetImpl<Decl *> &Deserialized;
3208 GlobalDeclID CanonID;
3209 SmallVector<Decl *, 4> Chain;
3212 RedeclChainVisitor(ASTReader &Reader, SmallVectorImpl<DeclID> &SearchDecls,
3213 llvm::SmallPtrSetImpl<Decl *> &Deserialized,
3214 GlobalDeclID CanonID)
3215 : Reader(Reader), SearchDecls(SearchDecls), Deserialized(Deserialized),
3217 for (unsigned I = 0, N = SearchDecls.size(); I != N; ++I)
3218 addToChain(Reader.GetDecl(SearchDecls[I]));
3221 static bool visit(ModuleFile &M, bool Preorder, void *UserData) {
3225 return static_cast<RedeclChainVisitor *>(UserData)->visit(M);
3228 void addToChain(Decl *D) {
3232 if (Deserialized.erase(D))
3236 void searchForID(ModuleFile &M, GlobalDeclID GlobalID) {
3237 // Map global ID of the first declaration down to the local ID
3238 // used in this module file.
3239 DeclID ID = Reader.mapGlobalIDToModuleFileGlobalID(M, GlobalID);
3243 // Perform a binary search to find the local redeclarations for this
3244 // declaration (if any).
3245 const LocalRedeclarationsInfo Compare = { ID, 0 };
3246 const LocalRedeclarationsInfo *Result
3247 = std::lower_bound(M.RedeclarationsMap,
3248 M.RedeclarationsMap + M.LocalNumRedeclarationsInMap,
3250 if (Result == M.RedeclarationsMap + M.LocalNumRedeclarationsInMap ||
3251 Result->FirstID != ID) {
3252 // If we have a previously-canonical singleton declaration that was
3253 // merged into another redeclaration chain, create a trivial chain
3254 // for this single declaration so that it will get wired into the
3255 // complete redeclaration chain.
3256 if (GlobalID != CanonID &&
3257 GlobalID - NUM_PREDEF_DECL_IDS >= M.BaseDeclID &&
3258 GlobalID - NUM_PREDEF_DECL_IDS < M.BaseDeclID + M.LocalNumDecls) {
3259 addToChain(Reader.GetDecl(GlobalID));
3265 // Dig out all of the redeclarations.
3266 unsigned Offset = Result->Offset;
3267 unsigned N = M.RedeclarationChains[Offset];
3268 M.RedeclarationChains[Offset++] = 0; // Don't try to deserialize again
3269 for (unsigned I = 0; I != N; ++I)
3270 addToChain(Reader.GetLocalDecl(M, M.RedeclarationChains[Offset++]));
3273 bool visit(ModuleFile &M) {
3274 // Visit each of the declarations.
3275 for (unsigned I = 0, N = SearchDecls.size(); I != N; ++I)
3276 searchForID(M, SearchDecls[I]);
3277 // FIXME: If none of the SearchDecls had local IDs in this module, can
3278 // we avoid searching any ancestor module files?
3282 ArrayRef<Decl *> getChain() const {
3288 void ASTReader::loadPendingDeclChain(serialization::GlobalDeclID ID) {
3289 Decl *D = GetDecl(ID);
3290 Decl *CanonDecl = D->getCanonicalDecl();
3292 // Determine the set of declaration IDs we'll be searching for.
3293 SmallVector<DeclID, 1> SearchDecls;
3294 GlobalDeclID CanonID = 0;
3295 if (D == CanonDecl) {
3296 SearchDecls.push_back(ID); // Always first.
3299 MergedDeclsMap::iterator MergedPos = combineStoredMergedDecls(CanonDecl, ID);
3300 if (MergedPos != MergedDecls.end())
3301 SearchDecls.append(MergedPos->second.begin(), MergedPos->second.end());
3303 // Build up the list of redeclarations.
3304 RedeclChainVisitor Visitor(*this, SearchDecls, RedeclsDeserialized, CanonID);
3305 ModuleMgr.visitDepthFirst(&RedeclChainVisitor::visit, &Visitor);
3307 // Retrieve the chains.
3308 ArrayRef<Decl *> Chain = Visitor.getChain();
3312 // Hook up the chains.
3313 Decl *MostRecent = CanonDecl->getMostRecentDecl();
3314 for (unsigned I = 0, N = Chain.size(); I != N; ++I) {
3315 if (Chain[I] == CanonDecl)
3318 ASTDeclReader::attachPreviousDecl(*this, Chain[I], MostRecent);
3319 MostRecent = Chain[I];
3322 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
3326 /// \brief Given an ObjC interface, goes through the modules and links to the
3327 /// interface all the categories for it.
3328 class ObjCCategoriesVisitor {
3330 serialization::GlobalDeclID InterfaceID;
3331 ObjCInterfaceDecl *Interface;
3332 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
3333 unsigned PreviousGeneration;
3334 ObjCCategoryDecl *Tail;
3335 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
3337 void add(ObjCCategoryDecl *Cat) {
3338 // Only process each category once.
3339 if (!Deserialized.erase(Cat))
3342 // Check for duplicate categories.
3343 if (Cat->getDeclName()) {
3344 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
3346 Reader.getOwningModuleFile(Existing)
3347 != Reader.getOwningModuleFile(Cat)) {
3348 // FIXME: We should not warn for duplicates in diamond:
3356 // If there are duplicates in ML/MR, there will be warning when
3357 // creating MB *and* when importing MB. We should not warn when
3359 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
3360 << Interface->getDeclName() << Cat->getDeclName();
3361 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
3362 } else if (!Existing) {
3363 // Record this category.
3368 // Add this category to the end of the chain.
3370 ASTDeclReader::setNextObjCCategory(Tail, Cat);
3372 Interface->setCategoryListRaw(Cat);
3377 ObjCCategoriesVisitor(ASTReader &Reader,
3378 serialization::GlobalDeclID InterfaceID,
3379 ObjCInterfaceDecl *Interface,
3380 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
3381 unsigned PreviousGeneration)
3382 : Reader(Reader), InterfaceID(InterfaceID), Interface(Interface),
3383 Deserialized(Deserialized), PreviousGeneration(PreviousGeneration),
3386 // Populate the name -> category map with the set of known categories.
3387 for (auto *Cat : Interface->known_categories()) {
3388 if (Cat->getDeclName())
3389 NameCategoryMap[Cat->getDeclName()] = Cat;
3391 // Keep track of the tail of the category list.
3396 static bool visit(ModuleFile &M, void *UserData) {
3397 return static_cast<ObjCCategoriesVisitor *>(UserData)->visit(M);
3400 bool visit(ModuleFile &M) {
3401 // If we've loaded all of the category information we care about from
3402 // this module file, we're done.
3403 if (M.Generation <= PreviousGeneration)
3406 // Map global ID of the definition down to the local ID used in this
3407 // module file. If there is no such mapping, we'll find nothing here
3408 // (or in any module it imports).
3409 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
3413 // Perform a binary search to find the local redeclarations for this
3414 // declaration (if any).
3415 const ObjCCategoriesInfo Compare = { LocalID, 0 };
3416 const ObjCCategoriesInfo *Result
3417 = std::lower_bound(M.ObjCCategoriesMap,
3418 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
3420 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
3421 Result->DefinitionID != LocalID) {
3422 // We didn't find anything. If the class definition is in this module
3423 // file, then the module files it depends on cannot have any categories,
3424 // so suppress further lookup.
3425 return Reader.isDeclIDFromModule(InterfaceID, M);
3428 // We found something. Dig out all of the categories.
3429 unsigned Offset = Result->Offset;
3430 unsigned N = M.ObjCCategories[Offset];
3431 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
3432 for (unsigned I = 0; I != N; ++I)
3433 add(cast_or_null<ObjCCategoryDecl>(
3434 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
3440 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
3441 ObjCInterfaceDecl *D,
3442 unsigned PreviousGeneration) {
3443 ObjCCategoriesVisitor Visitor(*this, ID, D, CategoriesDeserialized,
3444 PreviousGeneration);
3445 ModuleMgr.visit(ObjCCategoriesVisitor::visit, &Visitor);
3449 /// Iterator over the redeclarations of a declaration that have already
3450 /// been merged into the same redeclaration chain.
3451 template<typename DeclT>
3452 class MergedRedeclIterator {
3453 DeclT *Start, *Canonical, *Current;
3455 MergedRedeclIterator() : Current(nullptr) {}
3456 MergedRedeclIterator(DeclT *Start)
3457 : Start(Start), Canonical(nullptr), Current(Start) {}
3459 DeclT *operator*() { return Current; }
3461 MergedRedeclIterator &operator++() {
3462 if (Current->isFirstDecl()) {
3463 Canonical = Current;
3464 Current = Current->getMostRecentDecl();
3466 Current = Current->getPreviousDecl();
3468 // If we started in the merged portion, we'll reach our start position
3469 // eventually. Otherwise, we'll never reach it, but the second declaration
3470 // we reached was the canonical declaration, so stop when we see that one
3472 if (Current == Start || Current == Canonical)
3477 friend bool operator!=(const MergedRedeclIterator &A,
3478 const MergedRedeclIterator &B) {
3479 return A.Current != B.Current;
3483 template<typename DeclT>
3484 llvm::iterator_range<MergedRedeclIterator<DeclT>> merged_redecls(DeclT *D) {
3485 return llvm::iterator_range<MergedRedeclIterator<DeclT>>(
3486 MergedRedeclIterator<DeclT>(D),
3487 MergedRedeclIterator<DeclT>());
3490 template<typename DeclT, typename Fn>
3491 static void forAllLaterRedecls(DeclT *D, Fn F) {
3494 // Check whether we've already merged D into its redeclaration chain.
3495 // MostRecent may or may not be nullptr if D has not been merged. If
3496 // not, walk the merged redecl chain and see if it's there.
3497 auto *MostRecent = D->getMostRecentDecl();
3499 for (auto *Redecl = MostRecent; Redecl && !Found;
3500 Redecl = Redecl->getPreviousDecl())
3501 Found = (Redecl == D);
3503 // If this declaration is merged, apply the functor to all later decls.
3505 for (auto *Redecl = MostRecent; Redecl != D;
3506 Redecl = Redecl->getPreviousDecl())
3511 void ASTDeclReader::UpdateDecl(Decl *D, ModuleFile &ModuleFile,
3512 const RecordData &Record) {
3513 while (Idx < Record.size()) {
3514 switch ((DeclUpdateKind)Record[Idx++]) {
3515 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
3516 // FIXME: If we also have an update record for instantiating the
3517 // definition of D, we need that to happen before we get here.
3518 Decl *MD = Reader.ReadDecl(ModuleFile, Record, Idx);
3519 assert(MD && "couldn't read decl from update record");
3520 // FIXME: We should call addHiddenDecl instead, to add the member
3521 // to its DeclContext.
3522 cast<CXXRecordDecl>(D)->addedMember(MD);
3526 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
3527 // It will be added to the template's specializations set when loaded.
3528 (void)Reader.ReadDecl(ModuleFile, Record, Idx);
3531 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
3533 = Reader.ReadDeclAs<NamespaceDecl>(ModuleFile, Record, Idx);
3535 // Each module has its own anonymous namespace, which is disjoint from
3536 // any other module's anonymous namespaces, so don't attach the anonymous
3537 // namespace at all.
3538 if (ModuleFile.Kind != MK_ImplicitModule &&
3539 ModuleFile.Kind != MK_ExplicitModule) {
3540 if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(D))
3541 TU->setAnonymousNamespace(Anon);
3543 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
3548 case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER:
3549 cast<VarDecl>(D)->getMemberSpecializationInfo()->setPointOfInstantiation(
3550 Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3553 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
3554 FunctionDecl *FD = cast<FunctionDecl>(D);
3555 if (Reader.PendingBodies[FD]) {
3556 // FIXME: Maybe check for ODR violations.
3557 // It's safe to stop now because this update record is always last.
3561 if (Record[Idx++]) {
3562 // Maintain AST consistency: any later redeclarations of this function
3563 // are inline if this one is. (We might have merged another declaration
3565 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
3566 FD->setImplicitlyInline();
3569 FD->setInnerLocStart(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3570 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD))
3571 std::tie(CD->CtorInitializers, CD->NumCtorInitializers) =
3572 Reader.ReadCXXCtorInitializers(ModuleFile, Record, Idx);
3573 if (auto *DD = dyn_cast<CXXDestructorDecl>(FD))
3574 // FIXME: Check consistency.
3575 DD->setOperatorDelete(Reader.ReadDeclAs<FunctionDecl>(ModuleFile,
3577 // Store the offset of the body so we can lazily load it later.
3578 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
3579 HasPendingBody = true;
3580 assert(Idx == Record.size() && "lazy body must be last");
3584 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
3585 auto *RD = cast<CXXRecordDecl>(D);
3586 bool HadDefinition = RD->getDefinition();
3587 ReadCXXRecordDefinition(RD);
3588 // Visible update is handled separately.
3589 uint64_t LexicalOffset = Record[Idx++];
3590 if (!HadDefinition && LexicalOffset) {
3591 RD->setHasExternalLexicalStorage(true);
3592 Reader.ReadDeclContextStorage(ModuleFile, ModuleFile.DeclsCursor,
3593 std::make_pair(LexicalOffset, 0),
3594 ModuleFile.DeclContextInfos[RD]);
3595 Reader.PendingDefinitions.insert(RD);
3598 auto TSK = (TemplateSpecializationKind)Record[Idx++];
3599 SourceLocation POI = Reader.ReadSourceLocation(ModuleFile, Record, Idx);
3600 if (MemberSpecializationInfo *MSInfo =
3601 RD->getMemberSpecializationInfo()) {
3602 MSInfo->setTemplateSpecializationKind(TSK);
3603 MSInfo->setPointOfInstantiation(POI);
3605 ClassTemplateSpecializationDecl *Spec =
3606 cast<ClassTemplateSpecializationDecl>(RD);
3607 Spec->setTemplateSpecializationKind(TSK);
3608 Spec->setPointOfInstantiation(POI);
3610 if (Record[Idx++]) {
3612 ReadDeclAs<ClassTemplatePartialSpecializationDecl>(Record, Idx);
3613 SmallVector<TemplateArgument, 8> TemplArgs;
3614 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
3615 auto *TemplArgList = TemplateArgumentList::CreateCopy(
3616 Reader.getContext(), TemplArgs.data(), TemplArgs.size());
3618 // FIXME: If we already have a partial specialization set,
3619 // check that it matches.
3620 if (!Spec->getSpecializedTemplateOrPartial()
3621 .is<ClassTemplatePartialSpecializationDecl *>())
3622 Spec->setInstantiationOf(PartialSpec, TemplArgList);
3626 RD->setTagKind((TagTypeKind)Record[Idx++]);
3627 RD->setLocation(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3628 RD->setLocStart(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3629 RD->setRBraceLoc(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3631 if (Record[Idx++]) {
3633 Reader.ReadAttributes(F, Attrs, Record, Idx);
3634 D->setAttrsImpl(Attrs, Reader.getContext());
3639 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
3640 // FIXME: This doesn't send the right notifications if there are
3641 // ASTMutationListeners other than an ASTWriter.
3642 FunctionProtoType::ExceptionSpecInfo ESI;
3643 SmallVector<QualType, 8> ExceptionStorage;
3644 Reader.readExceptionSpec(ModuleFile, ExceptionStorage, ESI, Record, Idx);
3645 for (auto *Redecl : merged_redecls(D)) {
3646 auto *FD = cast<FunctionDecl>(Redecl);
3647 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
3648 if (!isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
3649 // AST invariant: if any exception spec in the redecl chain is
3650 // resolved, all are resolved. We don't need to go any further.
3651 // FIXME: If the exception spec is resolved, check that it matches.
3654 FD->setType(Reader.Context.getFunctionType(
3655 FPT->getReturnType(), FPT->getParamTypes(),
3656 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
3661 case UPD_CXX_DEDUCED_RETURN_TYPE: {
3662 // FIXME: Also do this when merging redecls.
3663 QualType DeducedResultType = Reader.readType(ModuleFile, Record, Idx);
3664 for (auto *Redecl : merged_redecls(D)) {
3665 // FIXME: If the return type is already deduced, check that it matches.
3666 FunctionDecl *FD = cast<FunctionDecl>(Redecl);
3667 Reader.Context.adjustDeducedFunctionResultType(FD, DeducedResultType);
3672 case UPD_DECL_MARKED_USED: {
3673 // FIXME: This doesn't send the right notifications if there are
3674 // ASTMutationListeners other than an ASTWriter.
3676 // Maintain AST consistency: any later redeclarations are used too.
3677 forAllLaterRedecls(D, [](Decl *D) { D->Used = true; });
3681 case UPD_MANGLING_NUMBER:
3682 Reader.Context.setManglingNumber(cast<NamedDecl>(D), Record[Idx++]);
3685 case UPD_STATIC_LOCAL_NUMBER:
3686 Reader.Context.setStaticLocalNumber(cast<VarDecl>(D), Record[Idx++]);
3688 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
3689 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
3690 Reader.Context, ReadSourceRange(Record, Idx)));