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 "ASTCommon.h"
16 #include "ASTReaderInternals.h"
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/DeclCXX.h"
19 #include "clang/AST/DeclGroup.h"
20 #include "clang/AST/DeclTemplate.h"
21 #include "clang/AST/DeclVisitor.h"
22 #include "clang/AST/Expr.h"
23 #include "clang/Sema/IdentifierResolver.h"
24 #include "clang/Sema/SemaDiagnostic.h"
25 #include "clang/Serialization/ASTReader.h"
26 #include "llvm/Support/SaveAndRestore.h"
28 using namespace clang;
29 using namespace clang::serialization;
31 //===----------------------------------------------------------------------===//
32 // Declaration deserialization
33 //===----------------------------------------------------------------------===//
36 class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
38 ASTRecordReader &Record;
39 ASTReader::RecordLocation Loc;
40 const DeclID ThisDeclID;
41 const SourceLocation ThisDeclLoc;
42 typedef ASTReader::RecordData RecordData;
43 TypeID TypeIDForTypeDecl;
44 unsigned AnonymousDeclNumber;
45 GlobalDeclID NamedDeclForTagDecl;
46 IdentifierInfo *TypedefNameForLinkage;
50 ///\brief A flag to carry the information for a decl from the entity is
51 /// used. We use it to delay the marking of the canonical decl as used until
52 /// the entire declaration is deserialized and merged.
53 bool IsDeclMarkedUsed;
55 uint64_t GetCurrentCursorOffset();
57 uint64_t ReadLocalOffset() {
58 uint64_t LocalOffset = Record.readInt();
59 assert(LocalOffset < Loc.Offset && "offset point after current record");
60 return LocalOffset ? Loc.Offset - LocalOffset : 0;
63 uint64_t ReadGlobalOffset() {
64 uint64_t Local = ReadLocalOffset();
65 return Local ? Record.getGlobalBitOffset(Local) : 0;
68 SourceLocation ReadSourceLocation() {
69 return Record.readSourceLocation();
72 SourceRange ReadSourceRange() {
73 return Record.readSourceRange();
76 TypeSourceInfo *GetTypeSourceInfo() {
77 return Record.getTypeSourceInfo();
80 serialization::DeclID ReadDeclID() {
81 return Record.readDeclID();
84 std::string ReadString() {
85 return Record.readString();
88 void ReadDeclIDList(SmallVectorImpl<DeclID> &IDs) {
89 for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
90 IDs.push_back(ReadDeclID());
94 return Record.readDecl();
99 return Record.readDeclAs<T>();
102 void ReadQualifierInfo(QualifierInfo &Info) {
103 Record.readQualifierInfo(Info);
106 void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name) {
107 Record.readDeclarationNameLoc(DNLoc, Name);
110 serialization::SubmoduleID readSubmoduleID() {
111 if (Record.getIdx() == Record.size())
114 return Record.getGlobalSubmoduleID(Record.readInt());
117 Module *readModule() {
118 return Record.getSubmodule(readSubmoduleID());
121 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
122 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
123 const CXXRecordDecl *D);
124 void MergeDefinitionData(CXXRecordDecl *D,
125 struct CXXRecordDecl::DefinitionData &&NewDD);
126 void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
127 void MergeDefinitionData(ObjCInterfaceDecl *D,
128 struct ObjCInterfaceDecl::DefinitionData &&NewDD);
130 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
133 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
134 unsigned Index, NamedDecl *D);
136 /// Results from loading a RedeclarableDecl.
137 class RedeclarableResult {
139 GlobalDeclID FirstID;
143 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
144 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
146 /// \brief Retrieve the first ID.
147 GlobalDeclID getFirstID() const { return FirstID; }
149 /// \brief Is this declaration a key declaration?
150 bool isKeyDecl() const { return IsKeyDecl; }
152 /// \brief Get a known declaration that this should be merged with, if
154 Decl *getKnownMergeTarget() const { return MergeWith; }
157 /// \brief Class used to capture the result of searching for an existing
158 /// declaration of a specific kind and name, along with the ability
159 /// to update the place where this result was found (the declaration
160 /// chain hanging off an identifier or the DeclContext we searched in)
162 class FindExistingResult {
168 unsigned AnonymousDeclNumber;
169 IdentifierInfo *TypedefNameForLinkage;
171 void operator=(FindExistingResult &&) = delete;
174 FindExistingResult(ASTReader &Reader)
175 : Reader(Reader), New(nullptr), Existing(nullptr), AddResult(false),
176 AnonymousDeclNumber(0), TypedefNameForLinkage(nullptr) {}
178 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
179 unsigned AnonymousDeclNumber,
180 IdentifierInfo *TypedefNameForLinkage)
181 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
182 AnonymousDeclNumber(AnonymousDeclNumber),
183 TypedefNameForLinkage(TypedefNameForLinkage) {}
185 FindExistingResult(FindExistingResult &&Other)
186 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
187 AddResult(Other.AddResult),
188 AnonymousDeclNumber(Other.AnonymousDeclNumber),
189 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
190 Other.AddResult = false;
193 ~FindExistingResult();
195 /// \brief Suppress the addition of this result into the known set of
197 void suppress() { AddResult = false; }
199 operator NamedDecl*() const { return Existing; }
202 operator T*() const { return dyn_cast_or_null<T>(Existing); }
205 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
207 FindExistingResult findExisting(NamedDecl *D);
210 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
211 ASTReader::RecordLocation Loc,
212 DeclID thisDeclID, SourceLocation ThisDeclLoc)
213 : Reader(Reader), Record(Record), Loc(Loc),
214 ThisDeclID(thisDeclID), ThisDeclLoc(ThisDeclLoc),
215 TypeIDForTypeDecl(0), NamedDeclForTagDecl(0),
216 TypedefNameForLinkage(nullptr), HasPendingBody(false),
217 IsDeclMarkedUsed(false) {}
219 template <typename DeclT>
220 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
221 static Decl *getMostRecentDeclImpl(...);
222 static Decl *getMostRecentDecl(Decl *D);
224 template <typename DeclT>
225 static void attachPreviousDeclImpl(ASTReader &Reader,
226 Redeclarable<DeclT> *D, Decl *Previous,
228 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
229 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
232 template <typename DeclT>
233 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
234 static void attachLatestDeclImpl(...);
235 static void attachLatestDecl(Decl *D, Decl *latest);
237 template <typename DeclT>
238 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
239 static void markIncompleteDeclChainImpl(...);
241 /// \brief Determine whether this declaration has a pending body.
242 bool hasPendingBody() const { return HasPendingBody; }
244 void ReadFunctionDefinition(FunctionDecl *FD);
247 void UpdateDecl(Decl *D);
249 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
250 ObjCCategoryDecl *Next) {
251 Cat->NextClassCategory = Next;
254 void VisitDecl(Decl *D);
255 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
256 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
257 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
258 void VisitNamedDecl(NamedDecl *ND);
259 void VisitLabelDecl(LabelDecl *LD);
260 void VisitNamespaceDecl(NamespaceDecl *D);
261 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
262 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
263 void VisitTypeDecl(TypeDecl *TD);
264 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
265 void VisitTypedefDecl(TypedefDecl *TD);
266 void VisitTypeAliasDecl(TypeAliasDecl *TD);
267 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
268 RedeclarableResult VisitTagDecl(TagDecl *TD);
269 void VisitEnumDecl(EnumDecl *ED);
270 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
271 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
272 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
273 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
274 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
275 ClassTemplateSpecializationDecl *D);
276 void VisitClassTemplateSpecializationDecl(
277 ClassTemplateSpecializationDecl *D) {
278 VisitClassTemplateSpecializationDeclImpl(D);
280 void VisitClassTemplatePartialSpecializationDecl(
281 ClassTemplatePartialSpecializationDecl *D);
282 void VisitClassScopeFunctionSpecializationDecl(
283 ClassScopeFunctionSpecializationDecl *D);
285 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
286 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
287 VisitVarTemplateSpecializationDeclImpl(D);
289 void VisitVarTemplatePartialSpecializationDecl(
290 VarTemplatePartialSpecializationDecl *D);
291 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
292 void VisitValueDecl(ValueDecl *VD);
293 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
294 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
295 void VisitDeclaratorDecl(DeclaratorDecl *DD);
296 void VisitFunctionDecl(FunctionDecl *FD);
297 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
298 void VisitCXXMethodDecl(CXXMethodDecl *D);
299 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
300 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
301 void VisitCXXConversionDecl(CXXConversionDecl *D);
302 void VisitFieldDecl(FieldDecl *FD);
303 void VisitMSPropertyDecl(MSPropertyDecl *FD);
304 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
305 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
306 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
307 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
308 void VisitParmVarDecl(ParmVarDecl *PD);
309 void VisitDecompositionDecl(DecompositionDecl *DD);
310 void VisitBindingDecl(BindingDecl *BD);
311 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
312 DeclID VisitTemplateDecl(TemplateDecl *D);
313 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
314 void VisitClassTemplateDecl(ClassTemplateDecl *D);
315 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
316 void VisitVarTemplateDecl(VarTemplateDecl *D);
317 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
318 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
319 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
320 void VisitUsingDecl(UsingDecl *D);
321 void VisitUsingPackDecl(UsingPackDecl *D);
322 void VisitUsingShadowDecl(UsingShadowDecl *D);
323 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
324 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
325 void VisitExportDecl(ExportDecl *D);
326 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
327 void VisitImportDecl(ImportDecl *D);
328 void VisitAccessSpecDecl(AccessSpecDecl *D);
329 void VisitFriendDecl(FriendDecl *D);
330 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
331 void VisitStaticAssertDecl(StaticAssertDecl *D);
332 void VisitBlockDecl(BlockDecl *BD);
333 void VisitCapturedDecl(CapturedDecl *CD);
334 void VisitEmptyDecl(EmptyDecl *D);
336 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
339 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
342 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
343 DeclID TemplatePatternID = 0);
346 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
347 RedeclarableResult &Redecl,
348 DeclID TemplatePatternID = 0);
351 void mergeMergeable(Mergeable<T> *D);
353 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
354 RedeclarableTemplateDecl *Existing,
355 DeclID DsID, bool IsKeyDecl);
357 ObjCTypeParamList *ReadObjCTypeParamList();
359 // FIXME: Reorder according to DeclNodes.td?
360 void VisitObjCMethodDecl(ObjCMethodDecl *D);
361 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
362 void VisitObjCContainerDecl(ObjCContainerDecl *D);
363 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
364 void VisitObjCIvarDecl(ObjCIvarDecl *D);
365 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
366 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
367 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
368 void VisitObjCImplDecl(ObjCImplDecl *D);
369 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
370 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
371 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
372 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
373 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
374 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
375 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
376 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
378 } // end namespace clang
381 /// Iterator over the redeclarations of a declaration that have already
382 /// been merged into the same redeclaration chain.
383 template<typename DeclT>
384 class MergedRedeclIterator {
385 DeclT *Start, *Canonical, *Current;
387 MergedRedeclIterator() : Current(nullptr) {}
388 MergedRedeclIterator(DeclT *Start)
389 : Start(Start), Canonical(nullptr), Current(Start) {}
391 DeclT *operator*() { return Current; }
393 MergedRedeclIterator &operator++() {
394 if (Current->isFirstDecl()) {
396 Current = Current->getMostRecentDecl();
398 Current = Current->getPreviousDecl();
400 // If we started in the merged portion, we'll reach our start position
401 // eventually. Otherwise, we'll never reach it, but the second declaration
402 // we reached was the canonical declaration, so stop when we see that one
404 if (Current == Start || Current == Canonical)
409 friend bool operator!=(const MergedRedeclIterator &A,
410 const MergedRedeclIterator &B) {
411 return A.Current != B.Current;
414 } // end anonymous namespace
416 template <typename DeclT>
417 static llvm::iterator_range<MergedRedeclIterator<DeclT>>
418 merged_redecls(DeclT *D) {
419 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
420 MergedRedeclIterator<DeclT>());
423 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
424 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
427 void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
428 if (Record.readInt())
429 Reader.BodySource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
430 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
431 CD->NumCtorInitializers = Record.readInt();
432 if (CD->NumCtorInitializers)
433 CD->CtorInitializers = ReadGlobalOffset();
435 // Store the offset of the body so we can lazily load it later.
436 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
437 HasPendingBody = true;
440 void ASTDeclReader::Visit(Decl *D) {
441 DeclVisitor<ASTDeclReader, void>::Visit(D);
443 // At this point we have deserialized and merged the decl and it is safe to
444 // update its canonical decl to signal that the entire entity is used.
445 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
446 IsDeclMarkedUsed = false;
448 if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) {
450 DeclaratorDecl::ExtInfo *Info =
451 DD->DeclInfo.get<DeclaratorDecl::ExtInfo *>();
452 Info->TInfo = GetTypeSourceInfo();
455 DD->DeclInfo = GetTypeSourceInfo();
459 if (TypeDecl *TD = dyn_cast<TypeDecl>(D)) {
460 // We have a fully initialized TypeDecl. Read its type now.
461 TD->setTypeForDecl(Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull());
463 // If this is a tag declaration with a typedef name for linkage, it's safe
464 // to load that typedef now.
465 if (NamedDeclForTagDecl)
466 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
467 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
468 } else if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
469 // if we have a fully initialized TypeDecl, we can safely read its type now.
470 ID->TypeForDecl = Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull();
471 } else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
472 // FunctionDecl's body was written last after all other Stmts/Exprs.
473 // We only read it if FD doesn't already have a body (e.g., from another
475 // FIXME: Can we diagnose ODR violations somehow?
476 if (Record.readInt())
477 ReadFunctionDefinition(FD);
481 void ASTDeclReader::VisitDecl(Decl *D) {
482 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
483 isa<ParmVarDecl>(D)) {
484 // We don't want to deserialize the DeclContext of a template
485 // parameter or of a parameter of a function template immediately. These
486 // entities might be used in the formulation of its DeclContext (for
487 // example, a function parameter can be used in decltype() in trailing
488 // return type of the function). Use the translation unit DeclContext as a
490 GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID();
491 GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID();
492 if (!LexicalDCIDForTemplateParmDecl)
493 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
494 Reader.addPendingDeclContextInfo(D,
495 SemaDCIDForTemplateParmDecl,
496 LexicalDCIDForTemplateParmDecl);
497 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
499 DeclContext *SemaDC = ReadDeclAs<DeclContext>();
500 DeclContext *LexicalDC = ReadDeclAs<DeclContext>();
503 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
504 // Avoid calling setLexicalDeclContext() directly because it uses
505 // Decl::getASTContext() internally which is unsafe during derialization.
506 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
507 Reader.getContext());
509 D->setLocation(ThisDeclLoc);
510 D->setInvalidDecl(Record.readInt());
511 if (Record.readInt()) { // hasAttrs
513 Record.readAttributes(Attrs);
514 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
515 // internally which is unsafe during derialization.
516 D->setAttrsImpl(Attrs, Reader.getContext());
518 D->setImplicit(Record.readInt());
519 D->Used = Record.readInt();
520 IsDeclMarkedUsed |= D->Used;
521 D->setReferenced(Record.readInt());
522 D->setTopLevelDeclInObjCContainer(Record.readInt());
523 D->setAccess((AccessSpecifier)Record.readInt());
524 D->FromASTFile = true;
525 D->setModulePrivate(Record.readInt());
526 D->Hidden = D->isModulePrivate();
528 // Determine whether this declaration is part of a (sub)module. If so, it
529 // may not yet be visible.
530 if (unsigned SubmoduleID = readSubmoduleID()) {
531 // Store the owning submodule ID in the declaration.
532 D->setOwningModuleID(SubmoduleID);
535 // Module-private declarations are never visible, so there is no work to do.
536 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
537 // If local visibility is being tracked, this declaration will become
538 // hidden and visible as the owning module does. Inform Sema that this
539 // declaration might not be visible.
541 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
542 if (Owner->NameVisibility != Module::AllVisible) {
543 // The owning module is not visible. Mark this declaration as hidden.
546 // Note that this declaration was hidden because its owning module is
548 Reader.HiddenNamesMap[Owner].push_back(D);
554 void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
556 D->setLocation(ReadSourceLocation());
557 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
558 std::string Arg = ReadString();
559 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
560 D->getTrailingObjects<char>()[Arg.size()] = '\0';
563 void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
565 D->setLocation(ReadSourceLocation());
566 std::string Name = ReadString();
567 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
568 D->getTrailingObjects<char>()[Name.size()] = '\0';
570 D->ValueStart = Name.size() + 1;
571 std::string Value = ReadString();
572 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
574 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
577 void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
578 llvm_unreachable("Translation units are not serialized");
581 void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
583 ND->setDeclName(Record.readDeclarationName());
584 AnonymousDeclNumber = Record.readInt();
587 void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
589 TD->setLocStart(ReadSourceLocation());
590 // Delay type reading until after we have fully initialized the decl.
591 TypeIDForTypeDecl = Record.getGlobalTypeID(Record.readInt());
594 ASTDeclReader::RedeclarableResult
595 ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
596 RedeclarableResult Redecl = VisitRedeclarable(TD);
598 TypeSourceInfo *TInfo = GetTypeSourceInfo();
599 if (Record.readInt()) { // isModed
600 QualType modedT = Record.readType();
601 TD->setModedTypeSourceInfo(TInfo, modedT);
603 TD->setTypeSourceInfo(TInfo);
604 // Read and discard the declaration for which this is a typedef name for
605 // linkage, if it exists. We cannot rely on our type to pull in this decl,
606 // because it might have been merged with a type from another module and
607 // thus might not refer to our version of the declaration.
612 void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
613 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
614 mergeRedeclarable(TD, Redecl);
617 void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
618 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
619 if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>())
620 // Merged when we merge the template.
621 TD->setDescribedAliasTemplate(Template);
623 mergeRedeclarable(TD, Redecl);
626 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
627 RedeclarableResult Redecl = VisitRedeclarable(TD);
630 TD->IdentifierNamespace = Record.readInt();
631 TD->setTagKind((TagDecl::TagKind)Record.readInt());
632 if (!isa<CXXRecordDecl>(TD))
633 TD->setCompleteDefinition(Record.readInt());
634 TD->setEmbeddedInDeclarator(Record.readInt());
635 TD->setFreeStanding(Record.readInt());
636 TD->setCompleteDefinitionRequired(Record.readInt());
637 TD->setBraceRange(ReadSourceRange());
639 switch (Record.readInt()) {
643 TagDecl::ExtInfo *Info = new (Reader.getContext()) TagDecl::ExtInfo();
644 ReadQualifierInfo(*Info);
645 TD->TypedefNameDeclOrQualifier = Info;
648 case 2: // TypedefNameForAnonDecl
649 NamedDeclForTagDecl = ReadDeclID();
650 TypedefNameForLinkage = Record.getIdentifierInfo();
653 llvm_unreachable("unexpected tag info kind");
656 if (!isa<CXXRecordDecl>(TD))
657 mergeRedeclarable(TD, Redecl);
661 void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
663 if (TypeSourceInfo *TI = GetTypeSourceInfo())
664 ED->setIntegerTypeSourceInfo(TI);
666 ED->setIntegerType(Record.readType());
667 ED->setPromotionType(Record.readType());
668 ED->setNumPositiveBits(Record.readInt());
669 ED->setNumNegativeBits(Record.readInt());
670 ED->IsScoped = Record.readInt();
671 ED->IsScopedUsingClassTag = Record.readInt();
672 ED->IsFixed = Record.readInt();
674 // If this is a definition subject to the ODR, and we already have a
675 // definition, merge this one into it.
676 if (ED->IsCompleteDefinition &&
677 Reader.getContext().getLangOpts().Modules &&
678 Reader.getContext().getLangOpts().CPlusPlus) {
679 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
681 // This is the first time we've seen an imported definition. Look for a
682 // local definition before deciding that we are the first definition.
683 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
684 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
691 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
692 ED->IsCompleteDefinition = false;
693 Reader.mergeDefinitionVisibility(OldDef, ED);
699 if (EnumDecl *InstED = ReadDeclAs<EnumDecl>()) {
700 TemplateSpecializationKind TSK =
701 (TemplateSpecializationKind)Record.readInt();
702 SourceLocation POI = ReadSourceLocation();
703 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
704 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
708 ASTDeclReader::RedeclarableResult
709 ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
710 RedeclarableResult Redecl = VisitTagDecl(RD);
711 RD->setHasFlexibleArrayMember(Record.readInt());
712 RD->setAnonymousStructOrUnion(Record.readInt());
713 RD->setHasObjectMember(Record.readInt());
714 RD->setHasVolatileMember(Record.readInt());
718 void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
720 VD->setType(Record.readType());
723 void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
725 if (Record.readInt())
726 ECD->setInitExpr(Record.readExpr());
727 ECD->setInitVal(Record.readAPSInt());
731 void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
733 DD->setInnerLocStart(ReadSourceLocation());
734 if (Record.readInt()) { // hasExtInfo
735 DeclaratorDecl::ExtInfo *Info
736 = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
737 ReadQualifierInfo(*Info);
742 void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
743 RedeclarableResult Redecl = VisitRedeclarable(FD);
744 VisitDeclaratorDecl(FD);
746 ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName());
747 FD->IdentifierNamespace = Record.readInt();
749 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
750 // after everything else is read.
752 FD->SClass = (StorageClass)Record.readInt();
753 FD->IsInline = Record.readInt();
754 FD->IsInlineSpecified = Record.readInt();
755 FD->IsExplicitSpecified = Record.readInt();
756 FD->IsVirtualAsWritten = Record.readInt();
757 FD->IsPure = Record.readInt();
758 FD->HasInheritedPrototype = Record.readInt();
759 FD->HasWrittenPrototype = Record.readInt();
760 FD->IsDeleted = Record.readInt();
761 FD->IsTrivial = Record.readInt();
762 FD->IsDefaulted = Record.readInt();
763 FD->IsExplicitlyDefaulted = Record.readInt();
764 FD->HasImplicitReturnZero = Record.readInt();
765 FD->IsConstexpr = Record.readInt();
766 FD->UsesSEHTry = Record.readInt();
767 FD->HasSkippedBody = Record.readInt();
768 FD->IsLateTemplateParsed = Record.readInt();
769 FD->setCachedLinkage(Linkage(Record.readInt()));
770 FD->EndRangeLoc = ReadSourceLocation();
772 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
773 case FunctionDecl::TK_NonTemplate:
774 mergeRedeclarable(FD, Redecl);
776 case FunctionDecl::TK_FunctionTemplate:
777 // Merged when we merge the template.
778 FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
780 case FunctionDecl::TK_MemberSpecialization: {
781 FunctionDecl *InstFD = ReadDeclAs<FunctionDecl>();
782 TemplateSpecializationKind TSK =
783 (TemplateSpecializationKind)Record.readInt();
784 SourceLocation POI = ReadSourceLocation();
785 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
786 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
787 mergeRedeclarable(FD, Redecl);
790 case FunctionDecl::TK_FunctionTemplateSpecialization: {
791 FunctionTemplateDecl *Template = ReadDeclAs<FunctionTemplateDecl>();
792 TemplateSpecializationKind TSK =
793 (TemplateSpecializationKind)Record.readInt();
795 // Template arguments.
796 SmallVector<TemplateArgument, 8> TemplArgs;
797 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
799 // Template args as written.
800 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
801 SourceLocation LAngleLoc, RAngleLoc;
802 bool HasTemplateArgumentsAsWritten = Record.readInt();
803 if (HasTemplateArgumentsAsWritten) {
804 unsigned NumTemplateArgLocs = Record.readInt();
805 TemplArgLocs.reserve(NumTemplateArgLocs);
806 for (unsigned i=0; i != NumTemplateArgLocs; ++i)
807 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
809 LAngleLoc = ReadSourceLocation();
810 RAngleLoc = ReadSourceLocation();
813 SourceLocation POI = ReadSourceLocation();
815 ASTContext &C = Reader.getContext();
816 TemplateArgumentList *TemplArgList
817 = TemplateArgumentList::CreateCopy(C, TemplArgs);
818 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
819 for (unsigned i=0, e = TemplArgLocs.size(); i != e; ++i)
820 TemplArgsInfo.addArgument(TemplArgLocs[i]);
821 FunctionTemplateSpecializationInfo *FTInfo
822 = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
824 HasTemplateArgumentsAsWritten ? &TemplArgsInfo
827 FD->TemplateOrSpecialization = FTInfo;
829 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
830 // The template that contains the specializations set. It's not safe to
831 // use getCanonicalDecl on Template since it may still be initializing.
832 FunctionTemplateDecl *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
833 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
834 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
835 // FunctionTemplateSpecializationInfo's Profile().
836 // We avoid getASTContext because a decl in the parent hierarchy may
838 llvm::FoldingSetNodeID ID;
839 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
840 void *InsertPos = nullptr;
841 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
842 FunctionTemplateSpecializationInfo *ExistingInfo =
843 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
845 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
847 assert(Reader.getContext().getLangOpts().Modules &&
848 "already deserialized this template specialization");
849 mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
854 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
856 UnresolvedSet<8> TemplDecls;
857 unsigned NumTemplates = Record.readInt();
858 while (NumTemplates--)
859 TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
862 TemplateArgumentListInfo TemplArgs;
863 unsigned NumArgs = Record.readInt();
865 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
866 TemplArgs.setLAngleLoc(ReadSourceLocation());
867 TemplArgs.setRAngleLoc(ReadSourceLocation());
869 FD->setDependentTemplateSpecialization(Reader.getContext(),
870 TemplDecls, TemplArgs);
871 // These are not merged; we don't need to merge redeclarations of dependent
877 // Read in the parameters.
878 unsigned NumParams = Record.readInt();
879 SmallVector<ParmVarDecl *, 16> Params;
880 Params.reserve(NumParams);
881 for (unsigned I = 0; I != NumParams; ++I)
882 Params.push_back(ReadDeclAs<ParmVarDecl>());
883 FD->setParams(Reader.getContext(), Params);
886 void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
888 if (Record.readInt()) {
889 // Load the body on-demand. Most clients won't care, because method
890 // definitions rarely show up in headers.
891 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
892 HasPendingBody = true;
893 MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
894 MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
896 MD->setInstanceMethod(Record.readInt());
897 MD->setVariadic(Record.readInt());
898 MD->setPropertyAccessor(Record.readInt());
899 MD->setDefined(Record.readInt());
900 MD->IsOverriding = Record.readInt();
901 MD->HasSkippedBody = Record.readInt();
903 MD->IsRedeclaration = Record.readInt();
904 MD->HasRedeclaration = Record.readInt();
905 if (MD->HasRedeclaration)
906 Reader.getContext().setObjCMethodRedeclaration(MD,
907 ReadDeclAs<ObjCMethodDecl>());
909 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
910 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
911 MD->SetRelatedResultType(Record.readInt());
912 MD->setReturnType(Record.readType());
913 MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
914 MD->DeclEndLoc = ReadSourceLocation();
915 unsigned NumParams = Record.readInt();
916 SmallVector<ParmVarDecl *, 16> Params;
917 Params.reserve(NumParams);
918 for (unsigned I = 0; I != NumParams; ++I)
919 Params.push_back(ReadDeclAs<ParmVarDecl>());
921 MD->SelLocsKind = Record.readInt();
922 unsigned NumStoredSelLocs = Record.readInt();
923 SmallVector<SourceLocation, 16> SelLocs;
924 SelLocs.reserve(NumStoredSelLocs);
925 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
926 SelLocs.push_back(ReadSourceLocation());
928 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
931 void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
932 VisitTypedefNameDecl(D);
934 D->Variance = Record.readInt();
935 D->Index = Record.readInt();
936 D->VarianceLoc = ReadSourceLocation();
937 D->ColonLoc = ReadSourceLocation();
940 void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
942 CD->setAtStartLoc(ReadSourceLocation());
943 CD->setAtEndRange(ReadSourceRange());
946 ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
947 unsigned numParams = Record.readInt();
951 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
952 typeParams.reserve(numParams);
953 for (unsigned i = 0; i != numParams; ++i) {
954 auto typeParam = ReadDeclAs<ObjCTypeParamDecl>();
958 typeParams.push_back(typeParam);
961 SourceLocation lAngleLoc = ReadSourceLocation();
962 SourceLocation rAngleLoc = ReadSourceLocation();
964 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
965 typeParams, rAngleLoc);
968 void ASTDeclReader::ReadObjCDefinitionData(
969 struct ObjCInterfaceDecl::DefinitionData &Data) {
970 // Read the superclass.
971 Data.SuperClassTInfo = GetTypeSourceInfo();
973 Data.EndLoc = ReadSourceLocation();
974 Data.HasDesignatedInitializers = Record.readInt();
976 // Read the directly referenced protocols and their SourceLocations.
977 unsigned NumProtocols = Record.readInt();
978 SmallVector<ObjCProtocolDecl *, 16> Protocols;
979 Protocols.reserve(NumProtocols);
980 for (unsigned I = 0; I != NumProtocols; ++I)
981 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
982 SmallVector<SourceLocation, 16> ProtoLocs;
983 ProtoLocs.reserve(NumProtocols);
984 for (unsigned I = 0; I != NumProtocols; ++I)
985 ProtoLocs.push_back(ReadSourceLocation());
986 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
987 Reader.getContext());
989 // Read the transitive closure of protocols referenced by this class.
990 NumProtocols = Record.readInt();
992 Protocols.reserve(NumProtocols);
993 for (unsigned I = 0; I != NumProtocols; ++I)
994 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
995 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
996 Reader.getContext());
999 void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1000 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1001 // FIXME: odr checking?
1004 void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1005 RedeclarableResult Redecl = VisitRedeclarable(ID);
1006 VisitObjCContainerDecl(ID);
1007 TypeIDForTypeDecl = Record.getGlobalTypeID(Record.readInt());
1008 mergeRedeclarable(ID, Redecl);
1010 ID->TypeParamList = ReadObjCTypeParamList();
1011 if (Record.readInt()) {
1012 // Read the definition.
1013 ID->allocateDefinitionData();
1015 ReadObjCDefinitionData(ID->data());
1016 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1017 if (Canon->Data.getPointer()) {
1018 // If we already have a definition, keep the definition invariant and
1020 MergeDefinitionData(Canon, std::move(ID->data()));
1021 ID->Data = Canon->Data;
1023 // Set the definition data of the canonical declaration, so other
1024 // redeclarations will see it.
1025 ID->getCanonicalDecl()->Data = ID->Data;
1027 // We will rebuild this list lazily.
1028 ID->setIvarList(nullptr);
1031 // Note that we have deserialized a definition.
1032 Reader.PendingDefinitions.insert(ID);
1034 // Note that we've loaded this Objective-C class.
1035 Reader.ObjCClassesLoaded.push_back(ID);
1037 ID->Data = ID->getCanonicalDecl()->Data;
1041 void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1042 VisitFieldDecl(IVD);
1043 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1044 // This field will be built lazily.
1045 IVD->setNextIvar(nullptr);
1046 bool synth = Record.readInt();
1047 IVD->setSynthesize(synth);
1050 void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1051 RedeclarableResult Redecl = VisitRedeclarable(PD);
1052 VisitObjCContainerDecl(PD);
1053 mergeRedeclarable(PD, Redecl);
1055 if (Record.readInt()) {
1056 // Read the definition.
1057 PD->allocateDefinitionData();
1059 // Set the definition data of the canonical declaration, so other
1060 // redeclarations will see it.
1061 PD->getCanonicalDecl()->Data = PD->Data;
1063 unsigned NumProtoRefs = Record.readInt();
1064 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1065 ProtoRefs.reserve(NumProtoRefs);
1066 for (unsigned I = 0; I != NumProtoRefs; ++I)
1067 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1068 SmallVector<SourceLocation, 16> ProtoLocs;
1069 ProtoLocs.reserve(NumProtoRefs);
1070 for (unsigned I = 0; I != NumProtoRefs; ++I)
1071 ProtoLocs.push_back(ReadSourceLocation());
1072 PD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1073 Reader.getContext());
1075 // Note that we have deserialized a definition.
1076 Reader.PendingDefinitions.insert(PD);
1078 PD->Data = PD->getCanonicalDecl()->Data;
1082 void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1086 void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1087 VisitObjCContainerDecl(CD);
1088 CD->setCategoryNameLoc(ReadSourceLocation());
1089 CD->setIvarLBraceLoc(ReadSourceLocation());
1090 CD->setIvarRBraceLoc(ReadSourceLocation());
1092 // Note that this category has been deserialized. We do this before
1093 // deserializing the interface declaration, so that it will consider this
1095 Reader.CategoriesDeserialized.insert(CD);
1097 CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1098 CD->TypeParamList = ReadObjCTypeParamList();
1099 unsigned NumProtoRefs = Record.readInt();
1100 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1101 ProtoRefs.reserve(NumProtoRefs);
1102 for (unsigned I = 0; I != NumProtoRefs; ++I)
1103 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1104 SmallVector<SourceLocation, 16> ProtoLocs;
1105 ProtoLocs.reserve(NumProtoRefs);
1106 for (unsigned I = 0; I != NumProtoRefs; ++I)
1107 ProtoLocs.push_back(ReadSourceLocation());
1108 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1109 Reader.getContext());
1112 void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1113 VisitNamedDecl(CAD);
1114 CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1117 void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1119 D->setAtLoc(ReadSourceLocation());
1120 D->setLParenLoc(ReadSourceLocation());
1121 QualType T = Record.readType();
1122 TypeSourceInfo *TSI = GetTypeSourceInfo();
1124 D->setPropertyAttributes(
1125 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1126 D->setPropertyAttributesAsWritten(
1127 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1128 D->setPropertyImplementation(
1129 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1130 DeclarationName GetterName = Record.readDeclarationName();
1131 SourceLocation GetterLoc = ReadSourceLocation();
1132 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1133 DeclarationName SetterName = Record.readDeclarationName();
1134 SourceLocation SetterLoc = ReadSourceLocation();
1135 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1136 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1137 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1138 D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1141 void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1142 VisitObjCContainerDecl(D);
1143 D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1146 void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1147 VisitObjCImplDecl(D);
1148 D->CategoryNameLoc = ReadSourceLocation();
1151 void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1152 VisitObjCImplDecl(D);
1153 D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1154 D->SuperLoc = ReadSourceLocation();
1155 D->setIvarLBraceLoc(ReadSourceLocation());
1156 D->setIvarRBraceLoc(ReadSourceLocation());
1157 D->setHasNonZeroConstructors(Record.readInt());
1158 D->setHasDestructors(Record.readInt());
1159 D->NumIvarInitializers = Record.readInt();
1160 if (D->NumIvarInitializers)
1161 D->IvarInitializers = ReadGlobalOffset();
1164 void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1166 D->setAtLoc(ReadSourceLocation());
1167 D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1168 D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1169 D->IvarLoc = ReadSourceLocation();
1170 D->setGetterCXXConstructor(Record.readExpr());
1171 D->setSetterCXXAssignment(Record.readExpr());
1174 void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1175 VisitDeclaratorDecl(FD);
1176 FD->Mutable = Record.readInt();
1177 if (int BitWidthOrInitializer = Record.readInt()) {
1178 FD->InitStorage.setInt(
1179 static_cast<FieldDecl::InitStorageKind>(BitWidthOrInitializer - 1));
1180 if (FD->InitStorage.getInt() == FieldDecl::ISK_CapturedVLAType) {
1181 // Read captured variable length array.
1182 FD->InitStorage.setPointer(Record.readType().getAsOpaquePtr());
1184 FD->InitStorage.setPointer(Record.readExpr());
1187 if (!FD->getDeclName()) {
1188 if (FieldDecl *Tmpl = ReadDeclAs<FieldDecl>())
1189 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1194 void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1195 VisitDeclaratorDecl(PD);
1196 PD->GetterId = Record.getIdentifierInfo();
1197 PD->SetterId = Record.getIdentifierInfo();
1200 void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1203 FD->ChainingSize = Record.readInt();
1204 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1205 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1207 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1208 FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1213 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1214 RedeclarableResult Redecl = VisitRedeclarable(VD);
1215 VisitDeclaratorDecl(VD);
1217 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1218 VD->VarDeclBits.TSCSpec = Record.readInt();
1219 VD->VarDeclBits.InitStyle = Record.readInt();
1220 if (!isa<ParmVarDecl>(VD)) {
1221 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1223 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1224 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1225 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1226 VD->NonParmVarDeclBits.ARCPseudoStrong = Record.readInt();
1227 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1228 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1229 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1230 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1231 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1233 Linkage VarLinkage = Linkage(Record.readInt());
1234 VD->setCachedLinkage(VarLinkage);
1236 // Reconstruct the one piece of the IdentifierNamespace that we need.
1237 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1238 VD->getLexicalDeclContext()->isFunctionOrMethod())
1239 VD->setLocalExternDecl();
1241 if (uint64_t Val = Record.readInt()) {
1242 VD->setInit(Record.readExpr());
1243 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1244 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1245 Eval->CheckedICE = true;
1246 Eval->IsICE = Val == 3;
1251 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1253 switch ((VarKind)Record.readInt()) {
1254 case VarNotTemplate:
1255 // Only true variables (not parameters or implicit parameters) can be
1256 // merged; the other kinds are not really redeclarable at all.
1257 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1258 !isa<VarTemplateSpecializationDecl>(VD))
1259 mergeRedeclarable(VD, Redecl);
1262 // Merged when we merge the template.
1263 VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1265 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1266 VarDecl *Tmpl = ReadDeclAs<VarDecl>();
1267 TemplateSpecializationKind TSK =
1268 (TemplateSpecializationKind)Record.readInt();
1269 SourceLocation POI = ReadSourceLocation();
1270 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1271 mergeRedeclarable(VD, Redecl);
1279 void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1283 void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1285 unsigned isObjCMethodParam = Record.readInt();
1286 unsigned scopeDepth = Record.readInt();
1287 unsigned scopeIndex = Record.readInt();
1288 unsigned declQualifier = Record.readInt();
1289 if (isObjCMethodParam) {
1290 assert(scopeDepth == 0);
1291 PD->setObjCMethodScopeInfo(scopeIndex);
1292 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1294 PD->setScopeInfo(scopeDepth, scopeIndex);
1296 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1297 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1298 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1299 PD->setUninstantiatedDefaultArg(Record.readExpr());
1301 // FIXME: If this is a redeclaration of a function from another module, handle
1302 // inheritance of default arguments.
1305 void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1307 BindingDecl **BDs = DD->getTrailingObjects<BindingDecl*>();
1308 for (unsigned I = 0; I != DD->NumBindings; ++I)
1309 BDs[I] = ReadDeclAs<BindingDecl>();
1312 void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1314 BD->Binding = Record.readExpr();
1317 void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1319 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1320 AD->setRParenLoc(ReadSourceLocation());
1323 void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1325 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1326 BD->setSignatureAsWritten(GetTypeSourceInfo());
1327 unsigned NumParams = Record.readInt();
1328 SmallVector<ParmVarDecl *, 16> Params;
1329 Params.reserve(NumParams);
1330 for (unsigned I = 0; I != NumParams; ++I)
1331 Params.push_back(ReadDeclAs<ParmVarDecl>());
1332 BD->setParams(Params);
1334 BD->setIsVariadic(Record.readInt());
1335 BD->setBlockMissingReturnType(Record.readInt());
1336 BD->setIsConversionFromLambda(Record.readInt());
1338 bool capturesCXXThis = Record.readInt();
1339 unsigned numCaptures = Record.readInt();
1340 SmallVector<BlockDecl::Capture, 16> captures;
1341 captures.reserve(numCaptures);
1342 for (unsigned i = 0; i != numCaptures; ++i) {
1343 VarDecl *decl = ReadDeclAs<VarDecl>();
1344 unsigned flags = Record.readInt();
1345 bool byRef = (flags & 1);
1346 bool nested = (flags & 2);
1347 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1349 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1351 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1354 void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1356 unsigned ContextParamPos = Record.readInt();
1357 CD->setNothrow(Record.readInt() != 0);
1358 // Body is set by VisitCapturedStmt.
1359 for (unsigned I = 0; I < CD->NumParams; ++I) {
1360 if (I != ContextParamPos)
1361 CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1363 CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1367 void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1369 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1370 D->setExternLoc(ReadSourceLocation());
1371 D->setRBraceLoc(ReadSourceLocation());
1374 void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1376 D->RBraceLoc = ReadSourceLocation();
1379 void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1381 D->setLocStart(ReadSourceLocation());
1384 void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1385 RedeclarableResult Redecl = VisitRedeclarable(D);
1387 D->setInline(Record.readInt());
1388 D->LocStart = ReadSourceLocation();
1389 D->RBraceLoc = ReadSourceLocation();
1391 // Defer loading the anonymous namespace until we've finished merging
1392 // this namespace; loading it might load a later declaration of the
1393 // same namespace, and we have an invariant that older declarations
1394 // get merged before newer ones try to merge.
1395 GlobalDeclID AnonNamespace = 0;
1396 if (Redecl.getFirstID() == ThisDeclID) {
1397 AnonNamespace = ReadDeclID();
1399 // Link this namespace back to the first declaration, which has already
1400 // been deserialized.
1401 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1404 mergeRedeclarable(D, Redecl);
1406 if (AnonNamespace) {
1407 // Each module has its own anonymous namespace, which is disjoint from
1408 // any other module's anonymous namespaces, so don't attach the anonymous
1409 // namespace at all.
1410 NamespaceDecl *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1411 if (!Record.isModule())
1412 D->setAnonymousNamespace(Anon);
1416 void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1417 RedeclarableResult Redecl = VisitRedeclarable(D);
1419 D->NamespaceLoc = ReadSourceLocation();
1420 D->IdentLoc = ReadSourceLocation();
1421 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1422 D->Namespace = ReadDeclAs<NamedDecl>();
1423 mergeRedeclarable(D, Redecl);
1426 void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1428 D->setUsingLoc(ReadSourceLocation());
1429 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1430 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1431 D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1432 D->setTypename(Record.readInt());
1433 if (NamedDecl *Pattern = ReadDeclAs<NamedDecl>())
1434 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1438 void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1440 D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1441 NamedDecl **Expansions = D->getTrailingObjects<NamedDecl*>();
1442 for (unsigned I = 0; I != D->NumExpansions; ++I)
1443 Expansions[I] = ReadDeclAs<NamedDecl>();
1447 void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1448 RedeclarableResult Redecl = VisitRedeclarable(D);
1450 D->setTargetDecl(ReadDeclAs<NamedDecl>());
1451 D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1452 UsingShadowDecl *Pattern = ReadDeclAs<UsingShadowDecl>();
1454 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1455 mergeRedeclarable(D, Redecl);
1458 void ASTDeclReader::VisitConstructorUsingShadowDecl(
1459 ConstructorUsingShadowDecl *D) {
1460 VisitUsingShadowDecl(D);
1461 D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1462 D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1463 D->IsVirtual = Record.readInt();
1466 void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1468 D->UsingLoc = ReadSourceLocation();
1469 D->NamespaceLoc = ReadSourceLocation();
1470 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1471 D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1472 D->CommonAncestor = ReadDeclAs<DeclContext>();
1475 void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1477 D->setUsingLoc(ReadSourceLocation());
1478 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1479 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1480 D->EllipsisLoc = ReadSourceLocation();
1484 void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1485 UnresolvedUsingTypenameDecl *D) {
1487 D->TypenameLocation = ReadSourceLocation();
1488 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1489 D->EllipsisLoc = ReadSourceLocation();
1493 void ASTDeclReader::ReadCXXDefinitionData(
1494 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1495 // Note: the caller has deserialized the IsLambda bit already.
1496 Data.UserDeclaredConstructor = Record.readInt();
1497 Data.UserDeclaredSpecialMembers = Record.readInt();
1498 Data.Aggregate = Record.readInt();
1499 Data.PlainOldData = Record.readInt();
1500 Data.Empty = Record.readInt();
1501 Data.Polymorphic = Record.readInt();
1502 Data.Abstract = Record.readInt();
1503 Data.IsStandardLayout = Record.readInt();
1504 Data.HasNoNonEmptyBases = Record.readInt();
1505 Data.HasPrivateFields = Record.readInt();
1506 Data.HasProtectedFields = Record.readInt();
1507 Data.HasPublicFields = Record.readInt();
1508 Data.HasMutableFields = Record.readInt();
1509 Data.HasVariantMembers = Record.readInt();
1510 Data.HasOnlyCMembers = Record.readInt();
1511 Data.HasInClassInitializer = Record.readInt();
1512 Data.HasUninitializedReferenceMember = Record.readInt();
1513 Data.HasUninitializedFields = Record.readInt();
1514 Data.HasInheritedConstructor = Record.readInt();
1515 Data.HasInheritedAssignment = Record.readInt();
1516 Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1517 Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1518 Data.NeedOverloadResolutionForDestructor = Record.readInt();
1519 Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1520 Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1521 Data.DefaultedDestructorIsDeleted = Record.readInt();
1522 Data.HasTrivialSpecialMembers = Record.readInt();
1523 Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1524 Data.HasIrrelevantDestructor = Record.readInt();
1525 Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1526 Data.HasDefaultedDefaultConstructor = Record.readInt();
1527 Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1528 Data.HasConstexprDefaultConstructor = Record.readInt();
1529 Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1530 Data.ComputedVisibleConversions = Record.readInt();
1531 Data.UserProvidedDefaultConstructor = Record.readInt();
1532 Data.DeclaredSpecialMembers = Record.readInt();
1533 Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1534 Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1535 Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1536 Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1537 Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1538 Data.ODRHash = Record.readInt();
1539 Data.HasODRHash = true;
1541 if (Record.readInt()) {
1542 Reader.BodySource[D] = Loc.F->Kind == ModuleKind::MK_MainFile
1543 ? ExternalASTSource::EK_Never
1544 : ExternalASTSource::EK_Always;
1547 Data.NumBases = Record.readInt();
1549 Data.Bases = ReadGlobalOffset();
1550 Data.NumVBases = Record.readInt();
1552 Data.VBases = ReadGlobalOffset();
1554 Record.readUnresolvedSet(Data.Conversions);
1555 Record.readUnresolvedSet(Data.VisibleConversions);
1556 assert(Data.Definition && "Data.Definition should be already set!");
1557 Data.FirstFriend = ReadDeclID();
1559 if (Data.IsLambda) {
1560 typedef LambdaCapture Capture;
1561 CXXRecordDecl::LambdaDefinitionData &Lambda
1562 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1563 Lambda.Dependent = Record.readInt();
1564 Lambda.IsGenericLambda = Record.readInt();
1565 Lambda.CaptureDefault = Record.readInt();
1566 Lambda.NumCaptures = Record.readInt();
1567 Lambda.NumExplicitCaptures = Record.readInt();
1568 Lambda.ManglingNumber = Record.readInt();
1569 Lambda.ContextDecl = ReadDeclID();
1571 = (Capture*)Reader.Context.Allocate(sizeof(Capture)*Lambda.NumCaptures);
1572 Capture *ToCapture = Lambda.Captures;
1573 Lambda.MethodTyInfo = GetTypeSourceInfo();
1574 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1575 SourceLocation Loc = ReadSourceLocation();
1576 bool IsImplicit = Record.readInt();
1577 LambdaCaptureKind Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1582 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1586 VarDecl *Var = ReadDeclAs<VarDecl>();
1587 SourceLocation EllipsisLoc = ReadSourceLocation();
1588 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1595 void ASTDeclReader::MergeDefinitionData(
1596 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1597 assert(D->DefinitionData &&
1598 "merging class definition into non-definition");
1599 auto &DD = *D->DefinitionData;
1601 if (DD.Definition != MergeDD.Definition) {
1602 // Track that we merged the definitions.
1603 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1605 Reader.PendingDefinitions.erase(MergeDD.Definition);
1606 MergeDD.Definition->IsCompleteDefinition = false;
1607 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1608 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1609 "already loaded pending lookups for merged definition");
1612 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1613 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1614 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1615 // We faked up this definition data because we found a class for which we'd
1616 // not yet loaded the definition. Replace it with the real thing now.
1617 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1618 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1620 // Don't change which declaration is the definition; that is required
1621 // to be invariant once we select it.
1622 auto *Def = DD.Definition;
1623 DD = std::move(MergeDD);
1624 DD.Definition = Def;
1628 // FIXME: Move this out into a .def file?
1629 bool DetectedOdrViolation = false;
1630 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1631 #define MATCH_FIELD(Field) \
1632 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1634 MATCH_FIELD(UserDeclaredConstructor)
1635 MATCH_FIELD(UserDeclaredSpecialMembers)
1636 MATCH_FIELD(Aggregate)
1637 MATCH_FIELD(PlainOldData)
1639 MATCH_FIELD(Polymorphic)
1640 MATCH_FIELD(Abstract)
1641 MATCH_FIELD(IsStandardLayout)
1642 MATCH_FIELD(HasNoNonEmptyBases)
1643 MATCH_FIELD(HasPrivateFields)
1644 MATCH_FIELD(HasProtectedFields)
1645 MATCH_FIELD(HasPublicFields)
1646 MATCH_FIELD(HasMutableFields)
1647 MATCH_FIELD(HasVariantMembers)
1648 MATCH_FIELD(HasOnlyCMembers)
1649 MATCH_FIELD(HasInClassInitializer)
1650 MATCH_FIELD(HasUninitializedReferenceMember)
1651 MATCH_FIELD(HasUninitializedFields)
1652 MATCH_FIELD(HasInheritedConstructor)
1653 MATCH_FIELD(HasInheritedAssignment)
1654 MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1655 MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1656 MATCH_FIELD(NeedOverloadResolutionForDestructor)
1657 MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1658 MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1659 MATCH_FIELD(DefaultedDestructorIsDeleted)
1660 OR_FIELD(HasTrivialSpecialMembers)
1661 OR_FIELD(DeclaredNonTrivialSpecialMembers)
1662 MATCH_FIELD(HasIrrelevantDestructor)
1663 OR_FIELD(HasConstexprNonCopyMoveConstructor)
1664 OR_FIELD(HasDefaultedDefaultConstructor)
1665 MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1666 OR_FIELD(HasConstexprDefaultConstructor)
1667 MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1668 // ComputedVisibleConversions is handled below.
1669 MATCH_FIELD(UserProvidedDefaultConstructor)
1670 OR_FIELD(DeclaredSpecialMembers)
1671 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1672 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1673 MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1674 OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1675 OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1676 MATCH_FIELD(IsLambda)
1680 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1681 DetectedOdrViolation = true;
1682 // FIXME: Issue a diagnostic if the base classes don't match when we come
1683 // to lazily load them.
1685 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1686 // match when we come to lazily load them.
1687 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1688 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1689 DD.ComputedVisibleConversions = true;
1692 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1696 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1697 // when they occur within the body of a function template specialization).
1700 if (D->getODRHash() != MergeDD.ODRHash) {
1701 DetectedOdrViolation = true;
1704 if (DetectedOdrViolation)
1705 Reader.PendingOdrMergeFailures[DD.Definition].push_back(MergeDD.Definition);
1708 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1709 struct CXXRecordDecl::DefinitionData *DD;
1710 ASTContext &C = Reader.getContext();
1712 // Determine whether this is a lambda closure type, so that we can
1713 // allocate the appropriate DefinitionData structure.
1714 bool IsLambda = Record.readInt();
1716 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1719 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1721 ReadCXXDefinitionData(*DD, D);
1723 // We might already have a definition for this record. This can happen either
1724 // because we're reading an update record, or because we've already done some
1725 // merging. Either way, just merge into it.
1726 CXXRecordDecl *Canon = D->getCanonicalDecl();
1727 if (Canon->DefinitionData) {
1728 MergeDefinitionData(Canon, std::move(*DD));
1729 D->DefinitionData = Canon->DefinitionData;
1733 // Mark this declaration as being a definition.
1734 D->IsCompleteDefinition = true;
1735 D->DefinitionData = DD;
1737 // If this is not the first declaration or is an update record, we can have
1738 // other redeclarations already. Make a note that we need to propagate the
1739 // DefinitionData pointer onto them.
1740 if (Update || Canon != D) {
1741 Canon->DefinitionData = D->DefinitionData;
1742 Reader.PendingDefinitions.insert(D);
1746 ASTDeclReader::RedeclarableResult
1747 ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1748 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1750 ASTContext &C = Reader.getContext();
1753 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1755 switch ((CXXRecKind)Record.readInt()) {
1756 case CXXRecNotTemplate:
1757 // Merged when we merge the folding set entry in the primary template.
1758 if (!isa<ClassTemplateSpecializationDecl>(D))
1759 mergeRedeclarable(D, Redecl);
1761 case CXXRecTemplate: {
1762 // Merged when we merge the template.
1763 ClassTemplateDecl *Template = ReadDeclAs<ClassTemplateDecl>();
1764 D->TemplateOrInstantiation = Template;
1765 if (!Template->getTemplatedDecl()) {
1766 // We've not actually loaded the ClassTemplateDecl yet, because we're
1767 // currently being loaded as its pattern. Rely on it to set up our
1768 // TypeForDecl (see VisitClassTemplateDecl).
1770 // Beware: we do not yet know our canonical declaration, and may still
1771 // get merged once the surrounding class template has got off the ground.
1772 TypeIDForTypeDecl = 0;
1776 case CXXRecMemberSpecialization: {
1777 CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>();
1778 TemplateSpecializationKind TSK =
1779 (TemplateSpecializationKind)Record.readInt();
1780 SourceLocation POI = ReadSourceLocation();
1781 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1782 MSI->setPointOfInstantiation(POI);
1783 D->TemplateOrInstantiation = MSI;
1784 mergeRedeclarable(D, Redecl);
1789 bool WasDefinition = Record.readInt();
1791 ReadCXXRecordDefinition(D, /*Update*/false);
1793 // Propagate DefinitionData pointer from the canonical declaration.
1794 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1796 // Lazily load the key function to avoid deserializing every method so we can
1798 if (WasDefinition) {
1799 DeclID KeyFn = ReadDeclID();
1800 if (KeyFn && D->IsCompleteDefinition)
1801 // FIXME: This is wrong for the ARM ABI, where some other module may have
1802 // made this function no longer be a key function. We need an update
1803 // record or similar for that case.
1804 C.KeyFunctions[D] = KeyFn;
1810 void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1811 VisitFunctionDecl(D);
1814 void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1815 VisitFunctionDecl(D);
1817 unsigned NumOverridenMethods = Record.readInt();
1818 if (D->isCanonicalDecl()) {
1819 while (NumOverridenMethods--) {
1820 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1821 // MD may be initializing.
1822 if (CXXMethodDecl *MD = ReadDeclAs<CXXMethodDecl>())
1823 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1826 // We don't care about which declarations this used to override; we get
1827 // the relevant information from the canonical declaration.
1828 Record.skipInts(NumOverridenMethods);
1832 void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1833 // We need the inherited constructor information to merge the declaration,
1834 // so we have to read it before we call VisitCXXMethodDecl.
1835 if (D->isInheritingConstructor()) {
1836 auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1837 auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1838 *D->getTrailingObjects<InheritedConstructor>() =
1839 InheritedConstructor(Shadow, Ctor);
1842 VisitCXXMethodDecl(D);
1845 void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1846 VisitCXXMethodDecl(D);
1848 if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
1849 auto *Canon = cast<CXXDestructorDecl>(D->getCanonicalDecl());
1850 // FIXME: Check consistency if we have an old and new operator delete.
1851 if (!Canon->OperatorDelete)
1852 Canon->OperatorDelete = OperatorDelete;
1856 void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1857 VisitCXXMethodDecl(D);
1860 void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1862 D->ImportedAndComplete.setPointer(readModule());
1863 D->ImportedAndComplete.setInt(Record.readInt());
1864 SourceLocation *StoredLocs = D->getTrailingObjects<SourceLocation>();
1865 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1866 StoredLocs[I] = ReadSourceLocation();
1867 Record.skipInts(1); // The number of stored source locations.
1870 void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1872 D->setColonLoc(ReadSourceLocation());
1875 void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1877 if (Record.readInt()) // hasFriendDecl
1878 D->Friend = ReadDeclAs<NamedDecl>();
1880 D->Friend = GetTypeSourceInfo();
1881 for (unsigned i = 0; i != D->NumTPLists; ++i)
1882 D->getTrailingObjects<TemplateParameterList *>()[i] =
1883 Record.readTemplateParameterList();
1884 D->NextFriend = ReadDeclID();
1885 D->UnsupportedFriend = (Record.readInt() != 0);
1886 D->FriendLoc = ReadSourceLocation();
1889 void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1891 unsigned NumParams = Record.readInt();
1892 D->NumParams = NumParams;
1893 D->Params = new TemplateParameterList*[NumParams];
1894 for (unsigned i = 0; i != NumParams; ++i)
1895 D->Params[i] = Record.readTemplateParameterList();
1896 if (Record.readInt()) // HasFriendDecl
1897 D->Friend = ReadDeclAs<NamedDecl>();
1899 D->Friend = GetTypeSourceInfo();
1900 D->FriendLoc = ReadSourceLocation();
1903 DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
1906 DeclID PatternID = ReadDeclID();
1907 NamedDecl *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
1908 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
1909 // FIXME handle associated constraints
1910 D->init(TemplatedDecl, TemplateParams);
1915 ASTDeclReader::RedeclarableResult
1916 ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1917 RedeclarableResult Redecl = VisitRedeclarable(D);
1919 // Make sure we've allocated the Common pointer first. We do this before
1920 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
1921 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
1922 if (!CanonD->Common) {
1923 CanonD->Common = CanonD->newCommon(Reader.getContext());
1924 Reader.PendingDefinitions.insert(CanonD);
1926 D->Common = CanonD->Common;
1928 // If this is the first declaration of the template, fill in the information
1929 // for the 'common' pointer.
1930 if (ThisDeclID == Redecl.getFirstID()) {
1931 if (RedeclarableTemplateDecl *RTD
1932 = ReadDeclAs<RedeclarableTemplateDecl>()) {
1933 assert(RTD->getKind() == D->getKind() &&
1934 "InstantiatedFromMemberTemplate kind mismatch");
1935 D->setInstantiatedFromMemberTemplate(RTD);
1936 if (Record.readInt())
1937 D->setMemberSpecialization();
1941 DeclID PatternID = VisitTemplateDecl(D);
1942 D->IdentifierNamespace = Record.readInt();
1944 mergeRedeclarable(D, Redecl, PatternID);
1946 // If we merged the template with a prior declaration chain, merge the common
1948 // FIXME: Actually merge here, don't just overwrite.
1949 D->Common = D->getCanonicalDecl()->Common;
1954 static DeclID *newDeclIDList(ASTContext &Context, DeclID *Old,
1955 SmallVectorImpl<DeclID> &IDs) {
1956 assert(!IDs.empty() && "no IDs to add to list");
1958 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
1959 std::sort(IDs.begin(), IDs.end());
1960 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
1963 auto *Result = new (Context) DeclID[1 + IDs.size()];
1964 *Result = IDs.size();
1965 std::copy(IDs.begin(), IDs.end(), Result + 1);
1969 void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1970 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
1972 if (ThisDeclID == Redecl.getFirstID()) {
1973 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
1974 // the specializations.
1975 SmallVector<serialization::DeclID, 32> SpecIDs;
1976 ReadDeclIDList(SpecIDs);
1978 if (!SpecIDs.empty()) {
1979 auto *CommonPtr = D->getCommonPtr();
1980 CommonPtr->LazySpecializations = newDeclIDList(
1981 Reader.getContext(), CommonPtr->LazySpecializations, SpecIDs);
1985 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
1986 // We were loaded before our templated declaration was. We've not set up
1987 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
1989 Reader.Context.getInjectedClassNameType(
1990 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
1994 void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
1995 llvm_unreachable("BuiltinTemplates are not serialized");
1998 /// TODO: Unify with ClassTemplateDecl version?
1999 /// May require unifying ClassTemplateDecl and
2000 /// VarTemplateDecl beyond TemplateDecl...
2001 void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2002 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2004 if (ThisDeclID == Redecl.getFirstID()) {
2005 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2006 // the specializations.
2007 SmallVector<serialization::DeclID, 32> SpecIDs;
2008 ReadDeclIDList(SpecIDs);
2010 if (!SpecIDs.empty()) {
2011 auto *CommonPtr = D->getCommonPtr();
2012 CommonPtr->LazySpecializations = newDeclIDList(
2013 Reader.getContext(), CommonPtr->LazySpecializations, SpecIDs);
2018 ASTDeclReader::RedeclarableResult
2019 ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2020 ClassTemplateSpecializationDecl *D) {
2021 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2023 ASTContext &C = Reader.getContext();
2024 if (Decl *InstD = ReadDecl()) {
2025 if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2026 D->SpecializedTemplate = CTD;
2028 SmallVector<TemplateArgument, 8> TemplArgs;
2029 Record.readTemplateArgumentList(TemplArgs);
2030 TemplateArgumentList *ArgList
2031 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2032 ClassTemplateSpecializationDecl::SpecializedPartialSpecialization *PS
2033 = new (C) ClassTemplateSpecializationDecl::
2034 SpecializedPartialSpecialization();
2035 PS->PartialSpecialization
2036 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2037 PS->TemplateArgs = ArgList;
2038 D->SpecializedTemplate = PS;
2042 SmallVector<TemplateArgument, 8> TemplArgs;
2043 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2044 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2045 D->PointOfInstantiation = ReadSourceLocation();
2046 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2048 bool writtenAsCanonicalDecl = Record.readInt();
2049 if (writtenAsCanonicalDecl) {
2050 ClassTemplateDecl *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2051 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2052 // Set this as, or find, the canonical declaration for this specialization
2053 ClassTemplateSpecializationDecl *CanonSpec;
2054 if (ClassTemplatePartialSpecializationDecl *Partial =
2055 dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2056 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2057 .GetOrInsertNode(Partial);
2060 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2062 // If there was already a canonical specialization, merge into it.
2063 if (CanonSpec != D) {
2064 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2066 // This declaration might be a definition. Merge with any existing
2068 if (auto *DDD = D->DefinitionData) {
2069 if (CanonSpec->DefinitionData)
2070 MergeDefinitionData(CanonSpec, std::move(*DDD));
2072 CanonSpec->DefinitionData = D->DefinitionData;
2074 D->DefinitionData = CanonSpec->DefinitionData;
2080 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2081 ClassTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo
2082 = new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2083 ExplicitInfo->TypeAsWritten = TyInfo;
2084 ExplicitInfo->ExternLoc = ReadSourceLocation();
2085 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2086 D->ExplicitInfo = ExplicitInfo;
2092 void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2093 ClassTemplatePartialSpecializationDecl *D) {
2094 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2096 D->TemplateParams = Record.readTemplateParameterList();
2097 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2099 // These are read/set from/to the first declaration.
2100 if (ThisDeclID == Redecl.getFirstID()) {
2101 D->InstantiatedFromMember.setPointer(
2102 ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2103 D->InstantiatedFromMember.setInt(Record.readInt());
2107 void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2108 ClassScopeFunctionSpecializationDecl *D) {
2110 D->Specialization = ReadDeclAs<CXXMethodDecl>();
2113 void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2114 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2116 if (ThisDeclID == Redecl.getFirstID()) {
2117 // This FunctionTemplateDecl owns a CommonPtr; read it.
2118 SmallVector<serialization::DeclID, 32> SpecIDs;
2119 ReadDeclIDList(SpecIDs);
2121 if (!SpecIDs.empty()) {
2122 auto *CommonPtr = D->getCommonPtr();
2123 CommonPtr->LazySpecializations = newDeclIDList(
2124 Reader.getContext(), CommonPtr->LazySpecializations, SpecIDs);
2129 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2130 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2131 /// VarTemplate(Partial)SpecializationDecl with a new data
2132 /// structure Template(Partial)SpecializationDecl, and
2133 /// using Template(Partial)SpecializationDecl as input type.
2134 ASTDeclReader::RedeclarableResult
2135 ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2136 VarTemplateSpecializationDecl *D) {
2137 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2139 ASTContext &C = Reader.getContext();
2140 if (Decl *InstD = ReadDecl()) {
2141 if (VarTemplateDecl *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2142 D->SpecializedTemplate = VTD;
2144 SmallVector<TemplateArgument, 8> TemplArgs;
2145 Record.readTemplateArgumentList(TemplArgs);
2146 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2148 VarTemplateSpecializationDecl::SpecializedPartialSpecialization *PS =
2150 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2151 PS->PartialSpecialization =
2152 cast<VarTemplatePartialSpecializationDecl>(InstD);
2153 PS->TemplateArgs = ArgList;
2154 D->SpecializedTemplate = PS;
2159 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2160 VarTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo =
2161 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2162 ExplicitInfo->TypeAsWritten = TyInfo;
2163 ExplicitInfo->ExternLoc = ReadSourceLocation();
2164 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2165 D->ExplicitInfo = ExplicitInfo;
2168 SmallVector<TemplateArgument, 8> TemplArgs;
2169 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2170 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2171 D->PointOfInstantiation = ReadSourceLocation();
2172 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2174 bool writtenAsCanonicalDecl = Record.readInt();
2175 if (writtenAsCanonicalDecl) {
2176 VarTemplateDecl *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2177 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2178 // FIXME: If it's already present, merge it.
2179 if (VarTemplatePartialSpecializationDecl *Partial =
2180 dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2181 CanonPattern->getCommonPtr()->PartialSpecializations
2182 .GetOrInsertNode(Partial);
2184 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2192 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2193 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2194 /// VarTemplate(Partial)SpecializationDecl with a new data
2195 /// structure Template(Partial)SpecializationDecl, and
2196 /// using Template(Partial)SpecializationDecl as input type.
2197 void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2198 VarTemplatePartialSpecializationDecl *D) {
2199 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2201 D->TemplateParams = Record.readTemplateParameterList();
2202 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2204 // These are read/set from/to the first declaration.
2205 if (ThisDeclID == Redecl.getFirstID()) {
2206 D->InstantiatedFromMember.setPointer(
2207 ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2208 D->InstantiatedFromMember.setInt(Record.readInt());
2212 void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2215 D->setDeclaredWithTypename(Record.readInt());
2217 if (Record.readInt())
2218 D->setDefaultArgument(GetTypeSourceInfo());
2221 void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2222 VisitDeclaratorDecl(D);
2223 // TemplateParmPosition.
2224 D->setDepth(Record.readInt());
2225 D->setPosition(Record.readInt());
2226 if (D->isExpandedParameterPack()) {
2227 auto TypesAndInfos =
2228 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2229 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2230 new (&TypesAndInfos[I].first) QualType(Record.readType());
2231 TypesAndInfos[I].second = GetTypeSourceInfo();
2234 // Rest of NonTypeTemplateParmDecl.
2235 D->ParameterPack = Record.readInt();
2236 if (Record.readInt())
2237 D->setDefaultArgument(Record.readExpr());
2241 void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2242 VisitTemplateDecl(D);
2243 // TemplateParmPosition.
2244 D->setDepth(Record.readInt());
2245 D->setPosition(Record.readInt());
2246 if (D->isExpandedParameterPack()) {
2247 TemplateParameterList **Data =
2248 D->getTrailingObjects<TemplateParameterList *>();
2249 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2251 Data[I] = Record.readTemplateParameterList();
2253 // Rest of TemplateTemplateParmDecl.
2254 D->ParameterPack = Record.readInt();
2255 if (Record.readInt())
2256 D->setDefaultArgument(Reader.getContext(),
2257 Record.readTemplateArgumentLoc());
2261 void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2262 VisitRedeclarableTemplateDecl(D);
2265 void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2267 D->AssertExprAndFailed.setPointer(Record.readExpr());
2268 D->AssertExprAndFailed.setInt(Record.readInt());
2269 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2270 D->RParenLoc = ReadSourceLocation();
2273 void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2277 std::pair<uint64_t, uint64_t>
2278 ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2279 uint64_t LexicalOffset = ReadLocalOffset();
2280 uint64_t VisibleOffset = ReadLocalOffset();
2281 return std::make_pair(LexicalOffset, VisibleOffset);
2284 template <typename T>
2285 ASTDeclReader::RedeclarableResult
2286 ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2287 DeclID FirstDeclID = ReadDeclID();
2288 Decl *MergeWith = nullptr;
2290 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2291 bool IsFirstLocalDecl = false;
2293 uint64_t RedeclOffset = 0;
2295 // 0 indicates that this declaration was the only declaration of its entity,
2296 // and is used for space optimization.
2297 if (FirstDeclID == 0) {
2298 FirstDeclID = ThisDeclID;
2300 IsFirstLocalDecl = true;
2301 } else if (unsigned N = Record.readInt()) {
2302 // This declaration was the first local declaration, but may have imported
2303 // other declarations.
2305 IsFirstLocalDecl = true;
2307 // We have some declarations that must be before us in our redeclaration
2308 // chain. Read them now, and remember that we ought to merge with one of
2310 // FIXME: Provide a known merge target to the second and subsequent such
2312 for (unsigned I = 0; I != N - 1; ++I)
2313 MergeWith = ReadDecl();
2315 RedeclOffset = ReadLocalOffset();
2317 // This declaration was not the first local declaration. Read the first
2318 // local declaration now, to trigger the import of other redeclarations.
2322 T *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2323 if (FirstDecl != D) {
2324 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2325 // We temporarily set the first (canonical) declaration as the previous one
2326 // which is the one that matters and mark the real previous DeclID to be
2327 // loaded & attached later on.
2328 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2329 D->First = FirstDecl->getCanonicalDecl();
2332 T *DAsT = static_cast<T*>(D);
2334 // Note that we need to load local redeclarations of this decl and build a
2335 // decl chain for them. This must happen *after* we perform the preloading
2336 // above; this ensures that the redeclaration chain is built in the correct
2338 if (IsFirstLocalDecl)
2339 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2341 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2344 /// \brief Attempts to merge the given declaration (D) with another declaration
2345 /// of the same entity.
2346 template<typename T>
2347 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2348 RedeclarableResult &Redecl,
2349 DeclID TemplatePatternID) {
2350 // If modules are not available, there is no reason to perform this merge.
2351 if (!Reader.getContext().getLangOpts().Modules)
2354 // If we're not the canonical declaration, we don't need to merge.
2355 if (!DBase->isFirstDecl())
2358 T *D = static_cast<T*>(DBase);
2360 if (auto *Existing = Redecl.getKnownMergeTarget())
2361 // We already know of an existing declaration we should merge with.
2362 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2363 else if (FindExistingResult ExistingRes = findExisting(D))
2364 if (T *Existing = ExistingRes)
2365 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2368 /// \brief "Cast" to type T, asserting if we don't have an implicit conversion.
2369 /// We use this to put code in a template that will only be valid for certain
2371 template<typename T> static T assert_cast(T t) { return t; }
2372 template<typename T> static T assert_cast(...) {
2373 llvm_unreachable("bad assert_cast");
2376 /// \brief Merge together the pattern declarations from two template
2378 void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2379 RedeclarableTemplateDecl *Existing,
2380 DeclID DsID, bool IsKeyDecl) {
2381 auto *DPattern = D->getTemplatedDecl();
2382 auto *ExistingPattern = Existing->getTemplatedDecl();
2383 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2384 DPattern->getCanonicalDecl()->getGlobalID(),
2387 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2388 // Merge with any existing definition.
2389 // FIXME: This is duplicated in several places. Refactor.
2390 auto *ExistingClass =
2391 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2392 if (auto *DDD = DClass->DefinitionData) {
2393 if (ExistingClass->DefinitionData) {
2394 MergeDefinitionData(ExistingClass, std::move(*DDD));
2396 ExistingClass->DefinitionData = DClass->DefinitionData;
2397 // We may have skipped this before because we thought that DClass
2398 // was the canonical declaration.
2399 Reader.PendingDefinitions.insert(DClass);
2402 DClass->DefinitionData = ExistingClass->DefinitionData;
2404 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2407 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2408 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2410 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2411 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2412 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2413 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2415 llvm_unreachable("merged an unknown kind of redeclarable template");
2418 /// \brief Attempts to merge the given declaration (D) with another declaration
2419 /// of the same entity.
2420 template<typename T>
2421 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2422 RedeclarableResult &Redecl,
2423 DeclID TemplatePatternID) {
2424 T *D = static_cast<T*>(DBase);
2425 T *ExistingCanon = Existing->getCanonicalDecl();
2426 T *DCanon = D->getCanonicalDecl();
2427 if (ExistingCanon != DCanon) {
2428 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2429 "already merged this declaration");
2431 // Have our redeclaration link point back at the canonical declaration
2432 // of the existing declaration, so that this declaration has the
2433 // appropriate canonical declaration.
2434 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2435 D->First = ExistingCanon;
2436 ExistingCanon->Used |= D->Used;
2439 // When we merge a namespace, update its pointer to the first namespace.
2440 // We cannot have loaded any redeclarations of this declaration yet, so
2441 // there's nothing else that needs to be updated.
2442 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2443 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2444 assert_cast<NamespaceDecl*>(ExistingCanon));
2446 // When we merge a template, merge its pattern.
2447 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2448 mergeTemplatePattern(
2449 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2450 TemplatePatternID, Redecl.isKeyDecl());
2452 // If this declaration is a key declaration, make a note of that.
2453 if (Redecl.isKeyDecl())
2454 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2458 /// \brief Attempts to merge the given declaration (D) with another declaration
2459 /// of the same entity, for the case where the entity is not actually
2460 /// redeclarable. This happens, for instance, when merging the fields of
2461 /// identical class definitions from two different modules.
2462 template<typename T>
2463 void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2464 // If modules are not available, there is no reason to perform this merge.
2465 if (!Reader.getContext().getLangOpts().Modules)
2468 // ODR-based merging is only performed in C++. In C, identically-named things
2469 // in different translation units are not redeclarations (but may still have
2470 // compatible types).
2471 if (!Reader.getContext().getLangOpts().CPlusPlus)
2474 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2475 if (T *Existing = ExistingRes)
2476 Reader.Context.setPrimaryMergedDecl(static_cast<T*>(D),
2477 Existing->getCanonicalDecl());
2480 void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2482 unsigned NumVars = D->varlist_size();
2483 SmallVector<Expr *, 16> Vars;
2484 Vars.reserve(NumVars);
2485 for (unsigned i = 0; i != NumVars; ++i) {
2486 Vars.push_back(Record.readExpr());
2491 void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2493 D->setLocation(ReadSourceLocation());
2494 D->setCombiner(Record.readExpr());
2495 D->setInitializer(Record.readExpr());
2496 D->PrevDeclInScope = ReadDeclID();
2499 void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2503 //===----------------------------------------------------------------------===//
2504 // Attribute Reading
2505 //===----------------------------------------------------------------------===//
2507 /// \brief Reads attributes from the current stream position.
2508 void ASTReader::ReadAttributes(ASTRecordReader &Record, AttrVec &Attrs) {
2509 for (unsigned i = 0, e = Record.readInt(); i != e; ++i) {
2510 Attr *New = nullptr;
2511 attr::Kind Kind = (attr::Kind)Record.readInt();
2512 SourceRange Range = Record.readSourceRange();
2514 #include "clang/Serialization/AttrPCHRead.inc"
2516 assert(New && "Unable to decode attribute?");
2517 Attrs.push_back(New);
2521 //===----------------------------------------------------------------------===//
2522 // ASTReader Implementation
2523 //===----------------------------------------------------------------------===//
2525 /// \brief Note that we have loaded the declaration with the given
2528 /// This routine notes that this declaration has already been loaded,
2529 /// so that future GetDecl calls will return this declaration rather
2530 /// than trying to load a new declaration.
2531 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2532 assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2533 DeclsLoaded[Index] = D;
2537 /// \brief Determine whether the consumer will be interested in seeing
2538 /// this declaration (via HandleTopLevelDecl).
2540 /// This routine should return true for anything that might affect
2541 /// code generation, e.g., inline function definitions, Objective-C
2542 /// declarations with metadata, etc.
2543 static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2544 // An ObjCMethodDecl is never considered as "interesting" because its
2545 // implementation container always is.
2547 // An ImportDecl or VarDecl imported from a module will get emitted when
2548 // we import the relevant module.
2549 if ((isa<ImportDecl>(D) || isa<VarDecl>(D)) && D->getImportedOwningModule() &&
2550 Ctx.DeclMustBeEmitted(D))
2553 if (isa<FileScopeAsmDecl>(D) ||
2554 isa<ObjCProtocolDecl>(D) ||
2555 isa<ObjCImplDecl>(D) ||
2556 isa<ImportDecl>(D) ||
2557 isa<PragmaCommentDecl>(D) ||
2558 isa<PragmaDetectMismatchDecl>(D))
2560 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D))
2561 return !D->getDeclContext()->isFunctionOrMethod();
2562 if (VarDecl *Var = dyn_cast<VarDecl>(D))
2563 return Var->isFileVarDecl() &&
2564 Var->isThisDeclarationADefinition() == VarDecl::Definition;
2565 if (FunctionDecl *Func = dyn_cast<FunctionDecl>(D))
2566 return Func->doesThisDeclarationHaveABody() || HasBody;
2568 if (auto *ES = D->getASTContext().getExternalSource())
2569 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2575 /// \brief Get the correct cursor and offset for loading a declaration.
2576 ASTReader::RecordLocation
2577 ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2578 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2579 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2580 ModuleFile *M = I->second;
2581 const DeclOffset &DOffs =
2582 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2583 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2584 return RecordLocation(M, DOffs.BitOffset);
2587 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2588 ContinuousRangeMap<uint64_t, ModuleFile*, 4>::iterator I
2589 = GlobalBitOffsetsMap.find(GlobalOffset);
2591 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2592 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2595 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2596 return LocalOffset + M.GlobalBitOffset;
2599 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2600 const TemplateParameterList *Y);
2602 /// \brief Determine whether two template parameters are similar enough
2603 /// that they may be used in declarations of the same template.
2604 static bool isSameTemplateParameter(const NamedDecl *X,
2605 const NamedDecl *Y) {
2606 if (X->getKind() != Y->getKind())
2609 if (const TemplateTypeParmDecl *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2610 const TemplateTypeParmDecl *TY = cast<TemplateTypeParmDecl>(Y);
2611 return TX->isParameterPack() == TY->isParameterPack();
2614 if (const NonTypeTemplateParmDecl *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2615 const NonTypeTemplateParmDecl *TY = cast<NonTypeTemplateParmDecl>(Y);
2616 return TX->isParameterPack() == TY->isParameterPack() &&
2617 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2620 const TemplateTemplateParmDecl *TX = cast<TemplateTemplateParmDecl>(X);
2621 const TemplateTemplateParmDecl *TY = cast<TemplateTemplateParmDecl>(Y);
2622 return TX->isParameterPack() == TY->isParameterPack() &&
2623 isSameTemplateParameterList(TX->getTemplateParameters(),
2624 TY->getTemplateParameters());
2627 static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2628 if (auto *NS = X->getAsNamespace())
2630 if (auto *NAS = X->getAsNamespaceAlias())
2631 return NAS->getNamespace();
2635 static bool isSameQualifier(const NestedNameSpecifier *X,
2636 const NestedNameSpecifier *Y) {
2637 if (auto *NSX = getNamespace(X)) {
2638 auto *NSY = getNamespace(Y);
2639 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2641 } else if (X->getKind() != Y->getKind())
2644 // FIXME: For namespaces and types, we're permitted to check that the entity
2645 // is named via the same tokens. We should probably do so.
2646 switch (X->getKind()) {
2647 case NestedNameSpecifier::Identifier:
2648 if (X->getAsIdentifier() != Y->getAsIdentifier())
2651 case NestedNameSpecifier::Namespace:
2652 case NestedNameSpecifier::NamespaceAlias:
2653 // We've already checked that we named the same namespace.
2655 case NestedNameSpecifier::TypeSpec:
2656 case NestedNameSpecifier::TypeSpecWithTemplate:
2657 if (X->getAsType()->getCanonicalTypeInternal() !=
2658 Y->getAsType()->getCanonicalTypeInternal())
2661 case NestedNameSpecifier::Global:
2662 case NestedNameSpecifier::Super:
2666 // Recurse into earlier portion of NNS, if any.
2667 auto *PX = X->getPrefix();
2668 auto *PY = Y->getPrefix();
2670 return isSameQualifier(PX, PY);
2674 /// \brief Determine whether two template parameter lists are similar enough
2675 /// that they may be used in declarations of the same template.
2676 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2677 const TemplateParameterList *Y) {
2678 if (X->size() != Y->size())
2681 for (unsigned I = 0, N = X->size(); I != N; ++I)
2682 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2688 /// Determine whether the attributes we can overload on are identical for A and
2689 /// B. Will ignore any overloadable attrs represented in the type of A and B.
2690 static bool hasSameOverloadableAttrs(const FunctionDecl *A,
2691 const FunctionDecl *B) {
2692 // Note that pass_object_size attributes are represented in the function's
2693 // ExtParameterInfo, so we don't need to check them here.
2695 SmallVector<const EnableIfAttr *, 4> AEnableIfs;
2696 // Since this is an equality check, we can ignore that enable_if attrs show up
2697 // in reverse order.
2698 for (const auto *EIA : A->specific_attrs<EnableIfAttr>())
2699 AEnableIfs.push_back(EIA);
2701 SmallVector<const EnableIfAttr *, 4> BEnableIfs;
2702 for (const auto *EIA : B->specific_attrs<EnableIfAttr>())
2703 BEnableIfs.push_back(EIA);
2705 // Two very common cases: either we have 0 enable_if attrs, or we have an
2706 // unequal number of enable_if attrs.
2707 if (AEnableIfs.empty() && BEnableIfs.empty())
2710 if (AEnableIfs.size() != BEnableIfs.size())
2713 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2714 for (unsigned I = 0, E = AEnableIfs.size(); I != E; ++I) {
2718 AEnableIfs[I]->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2719 BEnableIfs[I]->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2720 if (Cand1ID != Cand2ID)
2727 /// \brief Determine whether the two declarations refer to the same entity.
2728 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2729 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2734 // Must be in the same context.
2735 if (!X->getDeclContext()->getRedeclContext()->Equals(
2736 Y->getDeclContext()->getRedeclContext()))
2739 // Two typedefs refer to the same entity if they have the same underlying
2741 if (TypedefNameDecl *TypedefX = dyn_cast<TypedefNameDecl>(X))
2742 if (TypedefNameDecl *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2743 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2744 TypedefY->getUnderlyingType());
2746 // Must have the same kind.
2747 if (X->getKind() != Y->getKind())
2750 // Objective-C classes and protocols with the same name always match.
2751 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2754 if (isa<ClassTemplateSpecializationDecl>(X)) {
2755 // No need to handle these here: we merge them when adding them to the
2760 // Compatible tags match.
2761 if (TagDecl *TagX = dyn_cast<TagDecl>(X)) {
2762 TagDecl *TagY = cast<TagDecl>(Y);
2763 return (TagX->getTagKind() == TagY->getTagKind()) ||
2764 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2765 TagX->getTagKind() == TTK_Interface) &&
2766 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2767 TagY->getTagKind() == TTK_Interface));
2770 // Functions with the same type and linkage match.
2771 // FIXME: This needs to cope with merging of prototyped/non-prototyped
2773 if (FunctionDecl *FuncX = dyn_cast<FunctionDecl>(X)) {
2774 FunctionDecl *FuncY = cast<FunctionDecl>(Y);
2775 if (CXXConstructorDecl *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
2776 CXXConstructorDecl *CtorY = cast<CXXConstructorDecl>(Y);
2777 if (CtorX->getInheritedConstructor() &&
2778 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
2779 CtorY->getInheritedConstructor().getConstructor()))
2782 ASTContext &C = FuncX->getASTContext();
2783 if (!C.hasSameType(FuncX->getType(), FuncY->getType())) {
2784 // We can get functions with different types on the redecl chain in C++17
2785 // if they have differing exception specifications and at least one of
2786 // the excpetion specs is unresolved.
2787 // FIXME: Do we need to check for C++14 deduced return types here too?
2788 auto *XFPT = FuncX->getType()->getAs<FunctionProtoType>();
2789 auto *YFPT = FuncY->getType()->getAs<FunctionProtoType>();
2790 if (C.getLangOpts().CPlusPlus1z && XFPT && YFPT &&
2791 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
2792 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
2793 C.hasSameFunctionTypeIgnoringExceptionSpec(FuncX->getType(),
2798 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
2799 hasSameOverloadableAttrs(FuncX, FuncY);
2802 // Variables with the same type and linkage match.
2803 if (VarDecl *VarX = dyn_cast<VarDecl>(X)) {
2804 VarDecl *VarY = cast<VarDecl>(Y);
2805 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
2806 ASTContext &C = VarX->getASTContext();
2807 if (C.hasSameType(VarX->getType(), VarY->getType()))
2810 // We can get decls with different types on the redecl chain. Eg.
2811 // template <typename T> struct S { static T Var[]; }; // #1
2812 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
2813 // Only? happens when completing an incomplete array type. In this case
2814 // when comparing #1 and #2 we should go through their element type.
2815 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
2816 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
2817 if (!VarXTy || !VarYTy)
2819 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
2820 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
2825 // Namespaces with the same name and inlinedness match.
2826 if (NamespaceDecl *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
2827 NamespaceDecl *NamespaceY = cast<NamespaceDecl>(Y);
2828 return NamespaceX->isInline() == NamespaceY->isInline();
2831 // Identical template names and kinds match if their template parameter lists
2832 // and patterns match.
2833 if (TemplateDecl *TemplateX = dyn_cast<TemplateDecl>(X)) {
2834 TemplateDecl *TemplateY = cast<TemplateDecl>(Y);
2835 return isSameEntity(TemplateX->getTemplatedDecl(),
2836 TemplateY->getTemplatedDecl()) &&
2837 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
2838 TemplateY->getTemplateParameters());
2841 // Fields with the same name and the same type match.
2842 if (FieldDecl *FDX = dyn_cast<FieldDecl>(X)) {
2843 FieldDecl *FDY = cast<FieldDecl>(Y);
2844 // FIXME: Also check the bitwidth is odr-equivalent, if any.
2845 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
2848 // Indirect fields with the same target field match.
2849 if (auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
2850 auto *IFDY = cast<IndirectFieldDecl>(Y);
2851 return IFDX->getAnonField()->getCanonicalDecl() ==
2852 IFDY->getAnonField()->getCanonicalDecl();
2855 // Enumerators with the same name match.
2856 if (isa<EnumConstantDecl>(X))
2857 // FIXME: Also check the value is odr-equivalent.
2860 // Using shadow declarations with the same target match.
2861 if (UsingShadowDecl *USX = dyn_cast<UsingShadowDecl>(X)) {
2862 UsingShadowDecl *USY = cast<UsingShadowDecl>(Y);
2863 return USX->getTargetDecl() == USY->getTargetDecl();
2866 // Using declarations with the same qualifier match. (We already know that
2867 // the name matches.)
2868 if (auto *UX = dyn_cast<UsingDecl>(X)) {
2869 auto *UY = cast<UsingDecl>(Y);
2870 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2871 UX->hasTypename() == UY->hasTypename() &&
2872 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2874 if (auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
2875 auto *UY = cast<UnresolvedUsingValueDecl>(Y);
2876 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2877 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2879 if (auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
2880 return isSameQualifier(
2882 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
2884 // Namespace alias definitions with the same target match.
2885 if (auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
2886 auto *NAY = cast<NamespaceAliasDecl>(Y);
2887 return NAX->getNamespace()->Equals(NAY->getNamespace());
2893 /// Find the context in which we should search for previous declarations when
2894 /// looking for declarations to merge.
2895 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
2897 if (NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC))
2898 return ND->getOriginalNamespace();
2900 if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) {
2901 // Try to dig out the definition.
2902 auto *DD = RD->DefinitionData;
2904 DD = RD->getCanonicalDecl()->DefinitionData;
2906 // If there's no definition yet, then DC's definition is added by an update
2907 // record, but we've not yet loaded that update record. In this case, we
2908 // commit to DC being the canonical definition now, and will fix this when
2909 // we load the update record.
2911 DD = new (Reader.Context) struct CXXRecordDecl::DefinitionData(RD);
2912 RD->IsCompleteDefinition = true;
2913 RD->DefinitionData = DD;
2914 RD->getCanonicalDecl()->DefinitionData = DD;
2916 // Track that we did this horrible thing so that we can fix it later.
2917 Reader.PendingFakeDefinitionData.insert(
2918 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
2921 return DD->Definition;
2924 if (EnumDecl *ED = dyn_cast<EnumDecl>(DC))
2925 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
2928 // We can see the TU here only if we have no Sema object. In that case,
2929 // there's no TU scope to look in, so using the DC alone is sufficient.
2930 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
2936 ASTDeclReader::FindExistingResult::~FindExistingResult() {
2937 // Record that we had a typedef name for linkage whether or not we merge
2938 // with that declaration.
2939 if (TypedefNameForLinkage) {
2940 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2941 Reader.ImportedTypedefNamesForLinkage.insert(
2942 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
2946 if (!AddResult || Existing)
2949 DeclarationName Name = New->getDeclName();
2950 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2951 if (needsAnonymousDeclarationNumber(New)) {
2952 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
2953 AnonymousDeclNumber, New);
2954 } else if (DC->isTranslationUnit() &&
2955 !Reader.getContext().getLangOpts().CPlusPlus) {
2956 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
2957 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
2959 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
2960 // Add the declaration to its redeclaration context so later merging
2961 // lookups will find it.
2962 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
2966 /// Find the declaration that should be merged into, given the declaration found
2967 /// by name lookup. If we're merging an anonymous declaration within a typedef,
2968 /// we need a matching typedef, and we merge with the type inside it.
2969 static NamedDecl *getDeclForMerging(NamedDecl *Found,
2970 bool IsTypedefNameForLinkage) {
2971 if (!IsTypedefNameForLinkage)
2974 // If we found a typedef declaration that gives a name to some other
2975 // declaration, then we want that inner declaration. Declarations from
2976 // AST files are handled via ImportedTypedefNamesForLinkage.
2977 if (Found->isFromASTFile())
2980 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
2981 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
2986 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
2989 // If the lexical context has been merged, look into the now-canonical
2991 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
2994 // If we've seen this before, return the canonical declaration.
2995 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
2996 if (Index < Previous.size() && Previous[Index])
2997 return Previous[Index];
2999 // If this is the first time, but we have parsed a declaration of the context,
3000 // build the anonymous declaration list from the parsed declaration.
3001 if (!cast<Decl>(DC)->isFromASTFile()) {
3002 numberAnonymousDeclsWithin(DC, [&](NamedDecl *ND, unsigned Number) {
3003 if (Previous.size() == Number)
3004 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3006 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3010 return Index < Previous.size() ? Previous[Index] : nullptr;
3013 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3014 DeclContext *DC, unsigned Index,
3016 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
3019 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
3020 if (Index >= Previous.size())
3021 Previous.resize(Index + 1);
3022 if (!Previous[Index])
3023 Previous[Index] = D;
3026 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3027 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3030 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3031 // Don't bother trying to find unnamed declarations that are in
3032 // unmergeable contexts.
3033 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3034 AnonymousDeclNumber, TypedefNameForLinkage);
3039 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3040 if (TypedefNameForLinkage) {
3041 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3042 std::make_pair(DC, TypedefNameForLinkage));
3043 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3044 if (isSameEntity(It->second, D))
3045 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3046 TypedefNameForLinkage);
3047 // Go on to check in other places in case an existing typedef name
3048 // was not imported.
3051 if (needsAnonymousDeclarationNumber(D)) {
3052 // This is an anonymous declaration that we may need to merge. Look it up
3053 // in its context by number.
3054 if (auto *Existing = getAnonymousDeclForMerging(
3055 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3056 if (isSameEntity(Existing, D))
3057 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3058 TypedefNameForLinkage);
3059 } else if (DC->isTranslationUnit() &&
3060 !Reader.getContext().getLangOpts().CPlusPlus) {
3061 IdentifierResolver &IdResolver = Reader.getIdResolver();
3063 // Temporarily consider the identifier to be up-to-date. We don't want to
3064 // cause additional lookups here.
3065 class UpToDateIdentifierRAII {
3070 explicit UpToDateIdentifierRAII(IdentifierInfo *II)
3071 : II(II), WasOutToDate(false)
3074 WasOutToDate = II->isOutOfDate();
3076 II->setOutOfDate(false);
3080 ~UpToDateIdentifierRAII() {
3082 II->setOutOfDate(true);
3084 } UpToDate(Name.getAsIdentifierInfo());
3086 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3087 IEnd = IdResolver.end();
3089 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3090 if (isSameEntity(Existing, D))
3091 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3092 TypedefNameForLinkage);
3094 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3095 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3096 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3097 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3098 if (isSameEntity(Existing, D))
3099 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3100 TypedefNameForLinkage);
3103 // Not in a mergeable context.
3104 return FindExistingResult(Reader);
3107 // If this declaration is from a merged context, make a note that we need to
3108 // check that the canonical definition of that context contains the decl.
3110 // FIXME: We should do something similar if we merge two definitions of the
3111 // same template specialization into the same CXXRecordDecl.
3112 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3113 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3114 MergedDCIt->second == D->getDeclContext())
3115 Reader.PendingOdrMergeChecks.push_back(D);
3117 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3118 AnonymousDeclNumber, TypedefNameForLinkage);
3121 template<typename DeclT>
3122 Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3123 return D->RedeclLink.getLatestNotUpdated();
3125 Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3126 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3129 Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3132 switch (D->getKind()) {
3133 #define ABSTRACT_DECL(TYPE)
3134 #define DECL(TYPE, BASE) \
3136 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3137 #include "clang/AST/DeclNodes.inc"
3139 llvm_unreachable("unknown decl kind");
3142 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3143 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3146 template<typename DeclT>
3147 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3148 Redeclarable<DeclT> *D,
3149 Decl *Previous, Decl *Canon) {
3150 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3151 D->First = cast<DeclT>(Previous)->First;
3156 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3157 Redeclarable<VarDecl> *D,
3158 Decl *Previous, Decl *Canon) {
3159 VarDecl *VD = static_cast<VarDecl*>(D);
3160 VarDecl *PrevVD = cast<VarDecl>(Previous);
3161 D->RedeclLink.setPrevious(PrevVD);
3162 D->First = PrevVD->First;
3164 // We should keep at most one definition on the chain.
3165 // FIXME: Cache the definition once we've found it. Building a chain with
3166 // N definitions currently takes O(N^2) time here.
3167 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3168 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3169 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3170 Reader.mergeDefinitionVisibility(CurD, VD);
3171 VD->demoteThisDefinitionToDeclaration();
3179 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3180 Redeclarable<FunctionDecl> *D,
3181 Decl *Previous, Decl *Canon) {
3182 FunctionDecl *FD = static_cast<FunctionDecl*>(D);
3183 FunctionDecl *PrevFD = cast<FunctionDecl>(Previous);
3185 FD->RedeclLink.setPrevious(PrevFD);
3186 FD->First = PrevFD->First;
3188 // If the previous declaration is an inline function declaration, then this
3189 // declaration is too.
3190 if (PrevFD->IsInline != FD->IsInline) {
3191 // FIXME: [dcl.fct.spec]p4:
3192 // If a function with external linkage is declared inline in one
3193 // translation unit, it shall be declared inline in all translation
3194 // units in which it appears.
3196 // Be careful of this case:
3199 // template<typename T> struct X { void f(); };
3200 // template<typename T> inline void X<T>::f() {}
3202 // module B instantiates the declaration of X<int>::f
3203 // module C instantiates the definition of X<int>::f
3205 // If module B and C are merged, we do not have a violation of this rule.
3206 FD->IsInline = true;
3209 // If we need to propagate an exception specification along the redecl
3210 // chain, make a note of that so that we can do so later.
3211 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3212 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3213 if (FPT && PrevFPT) {
3214 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3215 bool WasUnresolved =
3216 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3217 if (IsUnresolved != WasUnresolved)
3218 Reader.PendingExceptionSpecUpdates.insert(
3219 std::make_pair(Canon, IsUnresolved ? PrevFD : FD));
3222 } // end namespace clang
3224 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3225 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3228 /// Inherit the default template argument from \p From to \p To. Returns
3229 /// \c false if there is no default template for \p From.
3230 template <typename ParmDecl>
3231 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3233 auto *To = cast<ParmDecl>(ToD);
3234 if (!From->hasDefaultArgument())
3236 To->setInheritedDefaultArgument(Context, From);
3240 static void inheritDefaultTemplateArguments(ASTContext &Context,
3243 auto *FromTP = From->getTemplateParameters();
3244 auto *ToTP = To->getTemplateParameters();
3245 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3247 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3248 NamedDecl *FromParam = FromTP->getParam(N - I - 1);
3249 if (FromParam->isParameterPack())
3251 NamedDecl *ToParam = ToTP->getParam(N - I - 1);
3253 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam)) {
3254 if (!inheritDefaultTemplateArgument(Context, FTTP, ToParam))
3256 } else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam)) {
3257 if (!inheritDefaultTemplateArgument(Context, FNTTP, ToParam))
3260 if (!inheritDefaultTemplateArgument(
3261 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam))
3267 void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3268 Decl *Previous, Decl *Canon) {
3269 assert(D && Previous);
3271 switch (D->getKind()) {
3272 #define ABSTRACT_DECL(TYPE)
3273 #define DECL(TYPE, BASE) \
3275 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3277 #include "clang/AST/DeclNodes.inc"
3280 // If the declaration was visible in one module, a redeclaration of it in
3281 // another module remains visible even if it wouldn't be visible by itself.
3283 // FIXME: In this case, the declaration should only be visible if a module
3284 // that makes it visible has been imported.
3285 D->IdentifierNamespace |=
3286 Previous->IdentifierNamespace &
3287 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3289 // If the declaration declares a template, it may inherit default arguments
3290 // from the previous declaration.
3291 if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D))
3292 inheritDefaultTemplateArguments(Reader.getContext(),
3293 cast<TemplateDecl>(Previous), TD);
3296 template<typename DeclT>
3297 void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3298 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3300 void ASTDeclReader::attachLatestDeclImpl(...) {
3301 llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3304 void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3305 assert(D && Latest);
3307 switch (D->getKind()) {
3308 #define ABSTRACT_DECL(TYPE)
3309 #define DECL(TYPE, BASE) \
3311 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3313 #include "clang/AST/DeclNodes.inc"
3317 template<typename DeclT>
3318 void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3319 D->RedeclLink.markIncomplete();
3321 void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3322 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3325 void ASTReader::markIncompleteDeclChain(Decl *D) {
3326 switch (D->getKind()) {
3327 #define ABSTRACT_DECL(TYPE)
3328 #define DECL(TYPE, BASE) \
3330 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3332 #include "clang/AST/DeclNodes.inc"
3336 /// \brief Read the declaration at the given offset from the AST file.
3337 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3338 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3339 SourceLocation DeclLoc;
3340 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3341 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3342 // Keep track of where we are in the stream, then jump back there
3343 // after reading this declaration.
3344 SavedStreamPosition SavedPosition(DeclsCursor);
3346 ReadingKindTracker ReadingKind(Read_Decl, *this);
3348 // Note that we are loading a declaration record.
3349 Deserializing ADecl(this);
3351 DeclsCursor.JumpToBit(Loc.Offset);
3352 ASTRecordReader Record(*this, *Loc.F);
3353 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3354 unsigned Code = DeclsCursor.ReadCode();
3357 switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3358 case DECL_CONTEXT_LEXICAL:
3359 case DECL_CONTEXT_VISIBLE:
3360 llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3362 D = TypedefDecl::CreateDeserialized(Context, ID);
3364 case DECL_TYPEALIAS:
3365 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3368 D = EnumDecl::CreateDeserialized(Context, ID);
3371 D = RecordDecl::CreateDeserialized(Context, ID);
3373 case DECL_ENUM_CONSTANT:
3374 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3377 D = FunctionDecl::CreateDeserialized(Context, ID);
3379 case DECL_LINKAGE_SPEC:
3380 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3383 D = ExportDecl::CreateDeserialized(Context, ID);
3386 D = LabelDecl::CreateDeserialized(Context, ID);
3388 case DECL_NAMESPACE:
3389 D = NamespaceDecl::CreateDeserialized(Context, ID);
3391 case DECL_NAMESPACE_ALIAS:
3392 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3395 D = UsingDecl::CreateDeserialized(Context, ID);
3397 case DECL_USING_PACK:
3398 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3400 case DECL_USING_SHADOW:
3401 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3403 case DECL_CONSTRUCTOR_USING_SHADOW:
3404 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3406 case DECL_USING_DIRECTIVE:
3407 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3409 case DECL_UNRESOLVED_USING_VALUE:
3410 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3412 case DECL_UNRESOLVED_USING_TYPENAME:
3413 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3415 case DECL_CXX_RECORD:
3416 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3418 case DECL_CXX_DEDUCTION_GUIDE:
3419 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3421 case DECL_CXX_METHOD:
3422 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3424 case DECL_CXX_CONSTRUCTOR:
3425 D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3427 case DECL_CXX_INHERITED_CONSTRUCTOR:
3428 D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3430 case DECL_CXX_DESTRUCTOR:
3431 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3433 case DECL_CXX_CONVERSION:
3434 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3436 case DECL_ACCESS_SPEC:
3437 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3440 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3442 case DECL_FRIEND_TEMPLATE:
3443 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3445 case DECL_CLASS_TEMPLATE:
3446 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3448 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3449 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3451 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3452 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3454 case DECL_VAR_TEMPLATE:
3455 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3457 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3458 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3460 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3461 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3463 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3464 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3466 case DECL_FUNCTION_TEMPLATE:
3467 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3469 case DECL_TEMPLATE_TYPE_PARM:
3470 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3472 case DECL_NON_TYPE_TEMPLATE_PARM:
3473 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3475 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3476 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3479 case DECL_TEMPLATE_TEMPLATE_PARM:
3480 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3482 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3483 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3486 case DECL_TYPE_ALIAS_TEMPLATE:
3487 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3489 case DECL_STATIC_ASSERT:
3490 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3492 case DECL_OBJC_METHOD:
3493 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3495 case DECL_OBJC_INTERFACE:
3496 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3498 case DECL_OBJC_IVAR:
3499 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3501 case DECL_OBJC_PROTOCOL:
3502 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3504 case DECL_OBJC_AT_DEFS_FIELD:
3505 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3507 case DECL_OBJC_CATEGORY:
3508 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3510 case DECL_OBJC_CATEGORY_IMPL:
3511 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3513 case DECL_OBJC_IMPLEMENTATION:
3514 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3516 case DECL_OBJC_COMPATIBLE_ALIAS:
3517 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3519 case DECL_OBJC_PROPERTY:
3520 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3522 case DECL_OBJC_PROPERTY_IMPL:
3523 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3526 D = FieldDecl::CreateDeserialized(Context, ID);
3528 case DECL_INDIRECTFIELD:
3529 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3532 D = VarDecl::CreateDeserialized(Context, ID);
3534 case DECL_IMPLICIT_PARAM:
3535 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3538 D = ParmVarDecl::CreateDeserialized(Context, ID);
3540 case DECL_DECOMPOSITION:
3541 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3544 D = BindingDecl::CreateDeserialized(Context, ID);
3546 case DECL_FILE_SCOPE_ASM:
3547 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3550 D = BlockDecl::CreateDeserialized(Context, ID);
3552 case DECL_MS_PROPERTY:
3553 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3556 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3558 case DECL_CXX_BASE_SPECIFIERS:
3559 Error("attempt to read a C++ base-specifier record as a declaration");
3561 case DECL_CXX_CTOR_INITIALIZERS:
3562 Error("attempt to read a C++ ctor initializer record as a declaration");
3565 // Note: last entry of the ImportDecl record is the number of stored source
3567 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3569 case DECL_OMP_THREADPRIVATE:
3570 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3572 case DECL_OMP_DECLARE_REDUCTION:
3573 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
3575 case DECL_OMP_CAPTUREDEXPR:
3576 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3578 case DECL_PRAGMA_COMMENT:
3579 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3581 case DECL_PRAGMA_DETECT_MISMATCH:
3582 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
3586 D = EmptyDecl::CreateDeserialized(Context, ID);
3588 case DECL_OBJC_TYPE_PARAM:
3589 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3593 assert(D && "Unknown declaration reading AST file");
3594 LoadedDecl(Index, D);
3595 // Set the DeclContext before doing any deserialization, to make sure internal
3596 // calls to Decl::getASTContext() by Decl's methods will find the
3597 // TranslationUnitDecl without crashing.
3598 D->setDeclContext(Context.getTranslationUnitDecl());
3601 // If this declaration is also a declaration context, get the
3602 // offsets for its tables of lexical and visible declarations.
3603 if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
3604 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3605 if (Offsets.first &&
3606 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3608 if (Offsets.second &&
3609 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3612 assert(Record.getIdx() == Record.size());
3614 // Load any relevant update records.
3615 PendingUpdateRecords.push_back(
3616 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3618 // Load the categories after recursive loading is finished.
3619 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(D))
3620 // If we already have a definition when deserializing the ObjCInterfaceDecl,
3621 // we put the Decl in PendingDefinitions so we can pull the categories here.
3622 if (Class->isThisDeclarationADefinition() ||
3623 PendingDefinitions.count(Class))
3624 loadObjCCategories(ID, Class);
3626 // If we have deserialized a declaration that has a definition the
3627 // AST consumer might need to know about, queue it.
3628 // We don't pass it to the consumer immediately because we may be in recursive
3629 // loading, and some declarations may still be initializing.
3630 PotentiallyInterestingDecls.push_back(
3631 InterestingDecl(D, Reader.hasPendingBody()));
3636 void ASTReader::PassInterestingDeclsToConsumer() {
3639 if (PassingDeclsToConsumer)
3642 // Guard variable to avoid recursively redoing the process of passing
3643 // decls to consumer.
3644 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3647 // Ensure that we've loaded all potentially-interesting declarations
3648 // that need to be eagerly loaded.
3649 for (auto ID : EagerlyDeserializedDecls)
3651 EagerlyDeserializedDecls.clear();
3653 while (!PotentiallyInterestingDecls.empty()) {
3654 InterestingDecl D = PotentiallyInterestingDecls.front();
3655 PotentiallyInterestingDecls.pop_front();
3656 if (isConsumerInterestedIn(Context, D.getDecl(), D.hasPendingBody()))
3657 PassInterestingDeclToConsumer(D.getDecl());
3661 void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3662 // The declaration may have been modified by files later in the chain.
3663 // If this is the case, read the record containing the updates from each file
3664 // and pass it to ASTDeclReader to make the modifications.
3665 serialization::GlobalDeclID ID = Record.ID;
3667 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3668 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3669 if (UpdI != DeclUpdateOffsets.end()) {
3670 auto UpdateOffsets = std::move(UpdI->second);
3671 DeclUpdateOffsets.erase(UpdI);
3673 // Check if this decl was interesting to the consumer. If we just loaded
3674 // the declaration, then we know it was interesting and we skip the call
3675 // to isConsumerInterestedIn because it is unsafe to call in the
3676 // current ASTReader state.
3677 bool WasInteresting =
3678 Record.JustLoaded || isConsumerInterestedIn(Context, D, false);
3679 for (auto &FileAndOffset : UpdateOffsets) {
3680 ModuleFile *F = FileAndOffset.first;
3681 uint64_t Offset = FileAndOffset.second;
3682 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3683 SavedStreamPosition SavedPosition(Cursor);
3684 Cursor.JumpToBit(Offset);
3685 unsigned Code = Cursor.ReadCode();
3686 ASTRecordReader Record(*this, *F);
3687 unsigned RecCode = Record.readRecord(Cursor, Code);
3689 assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3691 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
3693 Reader.UpdateDecl(D);
3695 // We might have made this declaration interesting. If so, remember that
3696 // we need to hand it off to the consumer.
3697 if (!WasInteresting &&
3698 isConsumerInterestedIn(Context, D, Reader.hasPendingBody())) {
3699 PotentiallyInterestingDecls.push_back(
3700 InterestingDecl(D, Reader.hasPendingBody()));
3701 WasInteresting = true;
3706 // Load the pending visible updates for this decl context, if it has any.
3707 auto I = PendingVisibleUpdates.find(ID);
3708 if (I != PendingVisibleUpdates.end()) {
3709 auto VisibleUpdates = std::move(I->second);
3710 PendingVisibleUpdates.erase(I);
3712 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
3713 for (const PendingVisibleUpdate &Update : VisibleUpdates)
3714 Lookups[DC].Table.add(
3715 Update.Mod, Update.Data,
3716 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
3717 DC->setHasExternalVisibleStorage(true);
3721 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
3722 // Attach FirstLocal to the end of the decl chain.
3723 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
3724 if (FirstLocal != CanonDecl) {
3725 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
3726 ASTDeclReader::attachPreviousDecl(
3727 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
3732 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
3736 // Load the list of other redeclarations from this module file.
3737 ModuleFile *M = getOwningModuleFile(FirstLocal);
3738 assert(M && "imported decl from no module file");
3740 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
3741 SavedStreamPosition SavedPosition(Cursor);
3742 Cursor.JumpToBit(LocalOffset);
3745 unsigned Code = Cursor.ReadCode();
3746 unsigned RecCode = Cursor.readRecord(Code, Record);
3748 assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
3750 // FIXME: We have several different dispatches on decl kind here; maybe
3751 // we should instead generate one loop per kind and dispatch up-front?
3752 Decl *MostRecent = FirstLocal;
3753 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
3754 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
3755 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
3758 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
3762 /// \brief Given an ObjC interface, goes through the modules and links to the
3763 /// interface all the categories for it.
3764 class ObjCCategoriesVisitor {
3766 ObjCInterfaceDecl *Interface;
3767 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
3768 ObjCCategoryDecl *Tail;
3769 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
3770 serialization::GlobalDeclID InterfaceID;
3771 unsigned PreviousGeneration;
3773 void add(ObjCCategoryDecl *Cat) {
3774 // Only process each category once.
3775 if (!Deserialized.erase(Cat))
3778 // Check for duplicate categories.
3779 if (Cat->getDeclName()) {
3780 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
3782 Reader.getOwningModuleFile(Existing)
3783 != Reader.getOwningModuleFile(Cat)) {
3784 // FIXME: We should not warn for duplicates in diamond:
3792 // If there are duplicates in ML/MR, there will be warning when
3793 // creating MB *and* when importing MB. We should not warn when
3795 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
3796 << Interface->getDeclName() << Cat->getDeclName();
3797 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
3798 } else if (!Existing) {
3799 // Record this category.
3804 // Add this category to the end of the chain.
3806 ASTDeclReader::setNextObjCCategory(Tail, Cat);
3808 Interface->setCategoryListRaw(Cat);
3813 ObjCCategoriesVisitor(ASTReader &Reader,
3814 ObjCInterfaceDecl *Interface,
3815 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
3816 serialization::GlobalDeclID InterfaceID,
3817 unsigned PreviousGeneration)
3818 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
3819 Tail(nullptr), InterfaceID(InterfaceID),
3820 PreviousGeneration(PreviousGeneration)
3822 // Populate the name -> category map with the set of known categories.
3823 for (auto *Cat : Interface->known_categories()) {
3824 if (Cat->getDeclName())
3825 NameCategoryMap[Cat->getDeclName()] = Cat;
3827 // Keep track of the tail of the category list.
3832 bool operator()(ModuleFile &M) {
3833 // If we've loaded all of the category information we care about from
3834 // this module file, we're done.
3835 if (M.Generation <= PreviousGeneration)
3838 // Map global ID of the definition down to the local ID used in this
3839 // module file. If there is no such mapping, we'll find nothing here
3840 // (or in any module it imports).
3841 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
3845 // Perform a binary search to find the local redeclarations for this
3846 // declaration (if any).
3847 const ObjCCategoriesInfo Compare = { LocalID, 0 };
3848 const ObjCCategoriesInfo *Result
3849 = std::lower_bound(M.ObjCCategoriesMap,
3850 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
3852 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
3853 Result->DefinitionID != LocalID) {
3854 // We didn't find anything. If the class definition is in this module
3855 // file, then the module files it depends on cannot have any categories,
3856 // so suppress further lookup.
3857 return Reader.isDeclIDFromModule(InterfaceID, M);
3860 // We found something. Dig out all of the categories.
3861 unsigned Offset = Result->Offset;
3862 unsigned N = M.ObjCCategories[Offset];
3863 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
3864 for (unsigned I = 0; I != N; ++I)
3865 add(cast_or_null<ObjCCategoryDecl>(
3866 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
3870 } // end anonymous namespace
3872 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
3873 ObjCInterfaceDecl *D,
3874 unsigned PreviousGeneration) {
3875 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
3876 PreviousGeneration);
3877 ModuleMgr.visit(Visitor);
3880 template<typename DeclT, typename Fn>
3881 static void forAllLaterRedecls(DeclT *D, Fn F) {
3884 // Check whether we've already merged D into its redeclaration chain.
3885 // MostRecent may or may not be nullptr if D has not been merged. If
3886 // not, walk the merged redecl chain and see if it's there.
3887 auto *MostRecent = D->getMostRecentDecl();
3889 for (auto *Redecl = MostRecent; Redecl && !Found;
3890 Redecl = Redecl->getPreviousDecl())
3891 Found = (Redecl == D);
3893 // If this declaration is merged, apply the functor to all later decls.
3895 for (auto *Redecl = MostRecent; Redecl != D;
3896 Redecl = Redecl->getPreviousDecl())
3901 void ASTDeclReader::UpdateDecl(Decl *D) {
3902 while (Record.getIdx() < Record.size()) {
3903 switch ((DeclUpdateKind)Record.readInt()) {
3904 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
3905 auto *RD = cast<CXXRecordDecl>(D);
3906 // FIXME: If we also have an update record for instantiating the
3907 // definition of D, we need that to happen before we get here.
3908 Decl *MD = Record.readDecl();
3909 assert(MD && "couldn't read decl from update record");
3910 // FIXME: We should call addHiddenDecl instead, to add the member
3911 // to its DeclContext.
3912 RD->addedMember(MD);
3916 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
3917 // It will be added to the template's specializations set when loaded.
3918 (void)Record.readDecl();
3921 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
3922 NamespaceDecl *Anon = ReadDeclAs<NamespaceDecl>();
3924 // Each module has its own anonymous namespace, which is disjoint from
3925 // any other module's anonymous namespaces, so don't attach the anonymous
3926 // namespace at all.
3927 if (!Record.isModule()) {
3928 if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(D))
3929 TU->setAnonymousNamespace(Anon);
3931 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
3936 case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER:
3937 cast<VarDecl>(D)->getMemberSpecializationInfo()->setPointOfInstantiation(
3938 ReadSourceLocation());
3941 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
3942 auto Param = cast<ParmVarDecl>(D);
3944 // We have to read the default argument regardless of whether we use it
3945 // so that hypothetical further update records aren't messed up.
3946 // TODO: Add a function to skip over the next expr record.
3947 auto DefaultArg = Record.readExpr();
3949 // Only apply the update if the parameter still has an uninstantiated
3950 // default argument.
3951 if (Param->hasUninstantiatedDefaultArg())
3952 Param->setDefaultArg(DefaultArg);
3956 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
3957 auto FD = cast<FieldDecl>(D);
3958 auto DefaultInit = Record.readExpr();
3960 // Only apply the update if the field still has an uninstantiated
3961 // default member initializer.
3962 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
3964 FD->setInClassInitializer(DefaultInit);
3966 // Instantiation failed. We can get here if we serialized an AST for
3967 // an invalid program.
3968 FD->removeInClassInitializer();
3973 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
3974 FunctionDecl *FD = cast<FunctionDecl>(D);
3975 if (Reader.PendingBodies[FD]) {
3976 // FIXME: Maybe check for ODR violations.
3977 // It's safe to stop now because this update record is always last.
3981 if (Record.readInt()) {
3982 // Maintain AST consistency: any later redeclarations of this function
3983 // are inline if this one is. (We might have merged another declaration
3985 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
3986 FD->setImplicitlyInline();
3989 FD->setInnerLocStart(ReadSourceLocation());
3990 ReadFunctionDefinition(FD);
3991 assert(Record.getIdx() == Record.size() && "lazy body must be last");
3995 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
3996 auto *RD = cast<CXXRecordDecl>(D);
3997 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
3998 bool HadRealDefinition =
3999 OldDD && (OldDD->Definition != RD ||
4000 !Reader.PendingFakeDefinitionData.count(OldDD));
4001 ReadCXXRecordDefinition(RD, /*Update*/true);
4003 // Visible update is handled separately.
4004 uint64_t LexicalOffset = ReadLocalOffset();
4005 if (!HadRealDefinition && LexicalOffset) {
4006 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4007 Reader.PendingFakeDefinitionData.erase(OldDD);
4010 auto TSK = (TemplateSpecializationKind)Record.readInt();
4011 SourceLocation POI = ReadSourceLocation();
4012 if (MemberSpecializationInfo *MSInfo =
4013 RD->getMemberSpecializationInfo()) {
4014 MSInfo->setTemplateSpecializationKind(TSK);
4015 MSInfo->setPointOfInstantiation(POI);
4017 ClassTemplateSpecializationDecl *Spec =
4018 cast<ClassTemplateSpecializationDecl>(RD);
4019 Spec->setTemplateSpecializationKind(TSK);
4020 Spec->setPointOfInstantiation(POI);
4022 if (Record.readInt()) {
4024 ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4025 SmallVector<TemplateArgument, 8> TemplArgs;
4026 Record.readTemplateArgumentList(TemplArgs);
4027 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4028 Reader.getContext(), TemplArgs);
4030 // FIXME: If we already have a partial specialization set,
4031 // check that it matches.
4032 if (!Spec->getSpecializedTemplateOrPartial()
4033 .is<ClassTemplatePartialSpecializationDecl *>())
4034 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4038 RD->setTagKind((TagTypeKind)Record.readInt());
4039 RD->setLocation(ReadSourceLocation());
4040 RD->setLocStart(ReadSourceLocation());
4041 RD->setBraceRange(ReadSourceRange());
4043 if (Record.readInt()) {
4045 Record.readAttributes(Attrs);
4046 // If the declaration already has attributes, we assume that some other
4047 // AST file already loaded them.
4049 D->setAttrsImpl(Attrs, Reader.getContext());
4054 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4055 // Set the 'operator delete' directly to avoid emitting another update
4057 auto *Del = ReadDeclAs<FunctionDecl>();
4058 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4059 // FIXME: Check consistency if we have an old and new operator delete.
4060 if (!First->OperatorDelete)
4061 First->OperatorDelete = Del;
4065 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4066 FunctionProtoType::ExceptionSpecInfo ESI;
4067 SmallVector<QualType, 8> ExceptionStorage;
4068 Record.readExceptionSpec(ExceptionStorage, ESI);
4070 // Update this declaration's exception specification, if needed.
4071 auto *FD = cast<FunctionDecl>(D);
4072 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4073 // FIXME: If the exception specification is already present, check that it
4075 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4076 FD->setType(Reader.Context.getFunctionType(
4077 FPT->getReturnType(), FPT->getParamTypes(),
4078 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4080 // When we get to the end of deserializing, see if there are other decls
4081 // that we need to propagate this exception specification onto.
4082 Reader.PendingExceptionSpecUpdates.insert(
4083 std::make_pair(FD->getCanonicalDecl(), FD));
4088 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4089 // FIXME: Also do this when merging redecls.
4090 QualType DeducedResultType = Record.readType();
4091 for (auto *Redecl : merged_redecls(D)) {
4092 // FIXME: If the return type is already deduced, check that it matches.
4093 FunctionDecl *FD = cast<FunctionDecl>(Redecl);
4094 Reader.Context.adjustDeducedFunctionResultType(FD, DeducedResultType);
4099 case UPD_DECL_MARKED_USED: {
4100 // Maintain AST consistency: any later redeclarations are used too.
4101 D->markUsed(Reader.Context);
4105 case UPD_MANGLING_NUMBER:
4106 Reader.Context.setManglingNumber(cast<NamedDecl>(D), Record.readInt());
4109 case UPD_STATIC_LOCAL_NUMBER:
4110 Reader.Context.setStaticLocalNumber(cast<VarDecl>(D), Record.readInt());
4113 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4114 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
4115 Reader.Context, ReadSourceRange()));
4118 case UPD_DECL_EXPORTED: {
4119 unsigned SubmoduleID = readSubmoduleID();
4120 auto *Exported = cast<NamedDecl>(D);
4121 if (auto *TD = dyn_cast<TagDecl>(Exported))
4122 Exported = TD->getDefinition();
4123 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4124 if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
4125 Reader.getContext().mergeDefinitionIntoModule(cast<NamedDecl>(Exported),
4127 Reader.PendingMergedDefinitionsToDeduplicate.insert(
4128 cast<NamedDecl>(Exported));
4129 } else if (Owner && Owner->NameVisibility != Module::AllVisible) {
4130 // If Owner is made visible at some later point, make this declaration
4132 Reader.HiddenNamesMap[Owner].push_back(Exported);
4134 // The declaration is now visible.
4135 Exported->Hidden = false;
4140 case UPD_DECL_MARKED_OPENMP_DECLARETARGET:
4141 case UPD_ADDED_ATTR_TO_RECORD:
4143 Record.readAttributes(Attrs);
4144 assert(Attrs.size() == 1);
4145 D->addAttr(Attrs[0]);