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);
129 void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
130 void MergeDefinitionData(ObjCProtocolDecl *D,
131 struct ObjCProtocolDecl::DefinitionData &&NewDD);
133 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
136 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
137 unsigned Index, NamedDecl *D);
139 /// Results from loading a RedeclarableDecl.
140 class RedeclarableResult {
142 GlobalDeclID FirstID;
146 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
147 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
149 /// \brief Retrieve the first ID.
150 GlobalDeclID getFirstID() const { return FirstID; }
152 /// \brief Is this declaration a key declaration?
153 bool isKeyDecl() const { return IsKeyDecl; }
155 /// \brief Get a known declaration that this should be merged with, if
157 Decl *getKnownMergeTarget() const { return MergeWith; }
160 /// \brief Class used to capture the result of searching for an existing
161 /// declaration of a specific kind and name, along with the ability
162 /// to update the place where this result was found (the declaration
163 /// chain hanging off an identifier or the DeclContext we searched in)
165 class FindExistingResult {
171 unsigned AnonymousDeclNumber;
172 IdentifierInfo *TypedefNameForLinkage;
174 void operator=(FindExistingResult &&) = delete;
177 FindExistingResult(ASTReader &Reader)
178 : Reader(Reader), New(nullptr), Existing(nullptr), AddResult(false),
179 AnonymousDeclNumber(0), TypedefNameForLinkage(nullptr) {}
181 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
182 unsigned AnonymousDeclNumber,
183 IdentifierInfo *TypedefNameForLinkage)
184 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
185 AnonymousDeclNumber(AnonymousDeclNumber),
186 TypedefNameForLinkage(TypedefNameForLinkage) {}
188 FindExistingResult(FindExistingResult &&Other)
189 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
190 AddResult(Other.AddResult),
191 AnonymousDeclNumber(Other.AnonymousDeclNumber),
192 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
193 Other.AddResult = false;
196 ~FindExistingResult();
198 /// \brief Suppress the addition of this result into the known set of
200 void suppress() { AddResult = false; }
202 operator NamedDecl*() const { return Existing; }
205 operator T*() const { return dyn_cast_or_null<T>(Existing); }
208 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
210 FindExistingResult findExisting(NamedDecl *D);
213 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
214 ASTReader::RecordLocation Loc,
215 DeclID thisDeclID, SourceLocation ThisDeclLoc)
216 : Reader(Reader), Record(Record), Loc(Loc),
217 ThisDeclID(thisDeclID), ThisDeclLoc(ThisDeclLoc),
218 TypeIDForTypeDecl(0), NamedDeclForTagDecl(0),
219 TypedefNameForLinkage(nullptr), HasPendingBody(false),
220 IsDeclMarkedUsed(false) {}
222 template <typename T> static
223 void AddLazySpecializations(T *D,
224 SmallVectorImpl<serialization::DeclID>& IDs) {
228 // FIXME: We should avoid this pattern of getting the ASTContext.
229 ASTContext &C = D->getASTContext();
231 auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
233 if (auto &Old = LazySpecializations) {
234 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
235 std::sort(IDs.begin(), IDs.end());
236 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
239 auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
240 *Result = IDs.size();
241 std::copy(IDs.begin(), IDs.end(), Result + 1);
243 LazySpecializations = Result;
246 template <typename DeclT>
247 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
248 static Decl *getMostRecentDeclImpl(...);
249 static Decl *getMostRecentDecl(Decl *D);
251 template <typename DeclT>
252 static void attachPreviousDeclImpl(ASTReader &Reader,
253 Redeclarable<DeclT> *D, Decl *Previous,
255 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
256 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
259 template <typename DeclT>
260 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
261 static void attachLatestDeclImpl(...);
262 static void attachLatestDecl(Decl *D, Decl *latest);
264 template <typename DeclT>
265 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
266 static void markIncompleteDeclChainImpl(...);
268 /// \brief Determine whether this declaration has a pending body.
269 bool hasPendingBody() const { return HasPendingBody; }
271 void ReadFunctionDefinition(FunctionDecl *FD);
274 void UpdateDecl(Decl *D, llvm::SmallVectorImpl<serialization::DeclID>&);
276 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
277 ObjCCategoryDecl *Next) {
278 Cat->NextClassCategory = Next;
281 void VisitDecl(Decl *D);
282 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
283 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
284 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
285 void VisitNamedDecl(NamedDecl *ND);
286 void VisitLabelDecl(LabelDecl *LD);
287 void VisitNamespaceDecl(NamespaceDecl *D);
288 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
289 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
290 void VisitTypeDecl(TypeDecl *TD);
291 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
292 void VisitTypedefDecl(TypedefDecl *TD);
293 void VisitTypeAliasDecl(TypeAliasDecl *TD);
294 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
295 RedeclarableResult VisitTagDecl(TagDecl *TD);
296 void VisitEnumDecl(EnumDecl *ED);
297 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
298 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
299 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
300 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
301 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
302 ClassTemplateSpecializationDecl *D);
303 void VisitClassTemplateSpecializationDecl(
304 ClassTemplateSpecializationDecl *D) {
305 VisitClassTemplateSpecializationDeclImpl(D);
307 void VisitClassTemplatePartialSpecializationDecl(
308 ClassTemplatePartialSpecializationDecl *D);
309 void VisitClassScopeFunctionSpecializationDecl(
310 ClassScopeFunctionSpecializationDecl *D);
312 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
313 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
314 VisitVarTemplateSpecializationDeclImpl(D);
316 void VisitVarTemplatePartialSpecializationDecl(
317 VarTemplatePartialSpecializationDecl *D);
318 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
319 void VisitValueDecl(ValueDecl *VD);
320 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
321 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
322 void VisitDeclaratorDecl(DeclaratorDecl *DD);
323 void VisitFunctionDecl(FunctionDecl *FD);
324 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
325 void VisitCXXMethodDecl(CXXMethodDecl *D);
326 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
327 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
328 void VisitCXXConversionDecl(CXXConversionDecl *D);
329 void VisitFieldDecl(FieldDecl *FD);
330 void VisitMSPropertyDecl(MSPropertyDecl *FD);
331 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
332 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
333 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
334 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
335 void VisitParmVarDecl(ParmVarDecl *PD);
336 void VisitDecompositionDecl(DecompositionDecl *DD);
337 void VisitBindingDecl(BindingDecl *BD);
338 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
339 DeclID VisitTemplateDecl(TemplateDecl *D);
340 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
341 void VisitClassTemplateDecl(ClassTemplateDecl *D);
342 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
343 void VisitVarTemplateDecl(VarTemplateDecl *D);
344 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
345 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
346 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
347 void VisitUsingDecl(UsingDecl *D);
348 void VisitUsingPackDecl(UsingPackDecl *D);
349 void VisitUsingShadowDecl(UsingShadowDecl *D);
350 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
351 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
352 void VisitExportDecl(ExportDecl *D);
353 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
354 void VisitImportDecl(ImportDecl *D);
355 void VisitAccessSpecDecl(AccessSpecDecl *D);
356 void VisitFriendDecl(FriendDecl *D);
357 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
358 void VisitStaticAssertDecl(StaticAssertDecl *D);
359 void VisitBlockDecl(BlockDecl *BD);
360 void VisitCapturedDecl(CapturedDecl *CD);
361 void VisitEmptyDecl(EmptyDecl *D);
363 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
366 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
369 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
370 DeclID TemplatePatternID = 0);
373 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
374 RedeclarableResult &Redecl,
375 DeclID TemplatePatternID = 0);
378 void mergeMergeable(Mergeable<T> *D);
380 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
381 RedeclarableTemplateDecl *Existing,
382 DeclID DsID, bool IsKeyDecl);
384 ObjCTypeParamList *ReadObjCTypeParamList();
386 // FIXME: Reorder according to DeclNodes.td?
387 void VisitObjCMethodDecl(ObjCMethodDecl *D);
388 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
389 void VisitObjCContainerDecl(ObjCContainerDecl *D);
390 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
391 void VisitObjCIvarDecl(ObjCIvarDecl *D);
392 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
393 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
394 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
395 void VisitObjCImplDecl(ObjCImplDecl *D);
396 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
397 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
398 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
399 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
400 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
401 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
402 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
403 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
405 } // end namespace clang
408 /// Iterator over the redeclarations of a declaration that have already
409 /// been merged into the same redeclaration chain.
410 template<typename DeclT>
411 class MergedRedeclIterator {
412 DeclT *Start, *Canonical, *Current;
414 MergedRedeclIterator() : Current(nullptr) {}
415 MergedRedeclIterator(DeclT *Start)
416 : Start(Start), Canonical(nullptr), Current(Start) {}
418 DeclT *operator*() { return Current; }
420 MergedRedeclIterator &operator++() {
421 if (Current->isFirstDecl()) {
423 Current = Current->getMostRecentDecl();
425 Current = Current->getPreviousDecl();
427 // If we started in the merged portion, we'll reach our start position
428 // eventually. Otherwise, we'll never reach it, but the second declaration
429 // we reached was the canonical declaration, so stop when we see that one
431 if (Current == Start || Current == Canonical)
436 friend bool operator!=(const MergedRedeclIterator &A,
437 const MergedRedeclIterator &B) {
438 return A.Current != B.Current;
441 } // end anonymous namespace
443 template <typename DeclT>
444 static llvm::iterator_range<MergedRedeclIterator<DeclT>>
445 merged_redecls(DeclT *D) {
446 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
447 MergedRedeclIterator<DeclT>());
450 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
451 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
454 void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
455 if (Record.readInt())
456 Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
457 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
458 CD->NumCtorInitializers = Record.readInt();
459 if (CD->NumCtorInitializers)
460 CD->CtorInitializers = ReadGlobalOffset();
462 // Store the offset of the body so we can lazily load it later.
463 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
464 HasPendingBody = true;
467 void ASTDeclReader::Visit(Decl *D) {
468 DeclVisitor<ASTDeclReader, void>::Visit(D);
470 // At this point we have deserialized and merged the decl and it is safe to
471 // update its canonical decl to signal that the entire entity is used.
472 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
473 IsDeclMarkedUsed = false;
475 if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) {
477 DeclaratorDecl::ExtInfo *Info =
478 DD->DeclInfo.get<DeclaratorDecl::ExtInfo *>();
479 Info->TInfo = GetTypeSourceInfo();
482 DD->DeclInfo = GetTypeSourceInfo();
486 if (TypeDecl *TD = dyn_cast<TypeDecl>(D)) {
487 // We have a fully initialized TypeDecl. Read its type now.
488 TD->setTypeForDecl(Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull());
490 // If this is a tag declaration with a typedef name for linkage, it's safe
491 // to load that typedef now.
492 if (NamedDeclForTagDecl)
493 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
494 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
495 } else if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
496 // if we have a fully initialized TypeDecl, we can safely read its type now.
497 ID->TypeForDecl = Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull();
498 } else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
499 // FunctionDecl's body was written last after all other Stmts/Exprs.
500 // We only read it if FD doesn't already have a body (e.g., from another
502 // FIXME: Can we diagnose ODR violations somehow?
503 if (Record.readInt())
504 ReadFunctionDefinition(FD);
508 void ASTDeclReader::VisitDecl(Decl *D) {
509 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
510 isa<ParmVarDecl>(D)) {
511 // We don't want to deserialize the DeclContext of a template
512 // parameter or of a parameter of a function template immediately. These
513 // entities might be used in the formulation of its DeclContext (for
514 // example, a function parameter can be used in decltype() in trailing
515 // return type of the function). Use the translation unit DeclContext as a
517 GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID();
518 GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID();
519 if (!LexicalDCIDForTemplateParmDecl)
520 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
521 Reader.addPendingDeclContextInfo(D,
522 SemaDCIDForTemplateParmDecl,
523 LexicalDCIDForTemplateParmDecl);
524 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
526 DeclContext *SemaDC = ReadDeclAs<DeclContext>();
527 DeclContext *LexicalDC = ReadDeclAs<DeclContext>();
530 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
531 // Avoid calling setLexicalDeclContext() directly because it uses
532 // Decl::getASTContext() internally which is unsafe during derialization.
533 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
534 Reader.getContext());
536 D->setLocation(ThisDeclLoc);
537 D->setInvalidDecl(Record.readInt());
538 if (Record.readInt()) { // hasAttrs
540 Record.readAttributes(Attrs);
541 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
542 // internally which is unsafe during derialization.
543 D->setAttrsImpl(Attrs, Reader.getContext());
545 D->setImplicit(Record.readInt());
546 D->Used = Record.readInt();
547 IsDeclMarkedUsed |= D->Used;
548 D->setReferenced(Record.readInt());
549 D->setTopLevelDeclInObjCContainer(Record.readInt());
550 D->setAccess((AccessSpecifier)Record.readInt());
551 D->FromASTFile = true;
552 bool ModulePrivate = Record.readInt();
554 // Determine whether this declaration is part of a (sub)module. If so, it
555 // may not yet be visible.
556 if (unsigned SubmoduleID = readSubmoduleID()) {
557 // Store the owning submodule ID in the declaration.
558 D->setModuleOwnershipKind(
559 ModulePrivate ? Decl::ModuleOwnershipKind::ModulePrivate
560 : Decl::ModuleOwnershipKind::VisibleWhenImported);
561 D->setOwningModuleID(SubmoduleID);
564 // Module-private declarations are never visible, so there is no work to
566 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
567 // If local visibility is being tracked, this declaration will become
568 // hidden and visible as the owning module does.
569 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
570 // Mark the declaration as visible when its owning module becomes visible.
571 if (Owner->NameVisibility == Module::AllVisible)
572 D->setVisibleDespiteOwningModule();
574 Reader.HiddenNamesMap[Owner].push_back(D);
576 } else if (ModulePrivate) {
577 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
581 void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
583 D->setLocation(ReadSourceLocation());
584 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
585 std::string Arg = ReadString();
586 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
587 D->getTrailingObjects<char>()[Arg.size()] = '\0';
590 void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
592 D->setLocation(ReadSourceLocation());
593 std::string Name = ReadString();
594 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
595 D->getTrailingObjects<char>()[Name.size()] = '\0';
597 D->ValueStart = Name.size() + 1;
598 std::string Value = ReadString();
599 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
601 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
604 void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
605 llvm_unreachable("Translation units are not serialized");
608 void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
610 ND->setDeclName(Record.readDeclarationName());
611 AnonymousDeclNumber = Record.readInt();
614 void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
616 TD->setLocStart(ReadSourceLocation());
617 // Delay type reading until after we have fully initialized the decl.
618 TypeIDForTypeDecl = Record.getGlobalTypeID(Record.readInt());
621 ASTDeclReader::RedeclarableResult
622 ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
623 RedeclarableResult Redecl = VisitRedeclarable(TD);
625 TypeSourceInfo *TInfo = GetTypeSourceInfo();
626 if (Record.readInt()) { // isModed
627 QualType modedT = Record.readType();
628 TD->setModedTypeSourceInfo(TInfo, modedT);
630 TD->setTypeSourceInfo(TInfo);
631 // Read and discard the declaration for which this is a typedef name for
632 // linkage, if it exists. We cannot rely on our type to pull in this decl,
633 // because it might have been merged with a type from another module and
634 // thus might not refer to our version of the declaration.
639 void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
640 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
641 mergeRedeclarable(TD, Redecl);
644 void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
645 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
646 if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>())
647 // Merged when we merge the template.
648 TD->setDescribedAliasTemplate(Template);
650 mergeRedeclarable(TD, Redecl);
653 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
654 RedeclarableResult Redecl = VisitRedeclarable(TD);
657 TD->IdentifierNamespace = Record.readInt();
658 TD->setTagKind((TagDecl::TagKind)Record.readInt());
659 if (!isa<CXXRecordDecl>(TD))
660 TD->setCompleteDefinition(Record.readInt());
661 TD->setEmbeddedInDeclarator(Record.readInt());
662 TD->setFreeStanding(Record.readInt());
663 TD->setCompleteDefinitionRequired(Record.readInt());
664 TD->setBraceRange(ReadSourceRange());
666 switch (Record.readInt()) {
670 TagDecl::ExtInfo *Info = new (Reader.getContext()) TagDecl::ExtInfo();
671 ReadQualifierInfo(*Info);
672 TD->TypedefNameDeclOrQualifier = Info;
675 case 2: // TypedefNameForAnonDecl
676 NamedDeclForTagDecl = ReadDeclID();
677 TypedefNameForLinkage = Record.getIdentifierInfo();
680 llvm_unreachable("unexpected tag info kind");
683 if (!isa<CXXRecordDecl>(TD))
684 mergeRedeclarable(TD, Redecl);
688 void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
690 if (TypeSourceInfo *TI = GetTypeSourceInfo())
691 ED->setIntegerTypeSourceInfo(TI);
693 ED->setIntegerType(Record.readType());
694 ED->setPromotionType(Record.readType());
695 ED->setNumPositiveBits(Record.readInt());
696 ED->setNumNegativeBits(Record.readInt());
697 ED->IsScoped = Record.readInt();
698 ED->IsScopedUsingClassTag = Record.readInt();
699 ED->IsFixed = Record.readInt();
701 // If this is a definition subject to the ODR, and we already have a
702 // definition, merge this one into it.
703 if (ED->IsCompleteDefinition &&
704 Reader.getContext().getLangOpts().Modules &&
705 Reader.getContext().getLangOpts().CPlusPlus) {
706 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
708 // This is the first time we've seen an imported definition. Look for a
709 // local definition before deciding that we are the first definition.
710 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
711 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
718 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
719 ED->IsCompleteDefinition = false;
720 Reader.mergeDefinitionVisibility(OldDef, ED);
726 if (EnumDecl *InstED = ReadDeclAs<EnumDecl>()) {
727 TemplateSpecializationKind TSK =
728 (TemplateSpecializationKind)Record.readInt();
729 SourceLocation POI = ReadSourceLocation();
730 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
731 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
735 ASTDeclReader::RedeclarableResult
736 ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
737 RedeclarableResult Redecl = VisitTagDecl(RD);
738 RD->setHasFlexibleArrayMember(Record.readInt());
739 RD->setAnonymousStructOrUnion(Record.readInt());
740 RD->setHasObjectMember(Record.readInt());
741 RD->setHasVolatileMember(Record.readInt());
745 void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
747 VD->setType(Record.readType());
750 void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
752 if (Record.readInt())
753 ECD->setInitExpr(Record.readExpr());
754 ECD->setInitVal(Record.readAPSInt());
758 void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
760 DD->setInnerLocStart(ReadSourceLocation());
761 if (Record.readInt()) { // hasExtInfo
762 DeclaratorDecl::ExtInfo *Info
763 = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
764 ReadQualifierInfo(*Info);
769 void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
770 RedeclarableResult Redecl = VisitRedeclarable(FD);
771 VisitDeclaratorDecl(FD);
773 ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName());
774 FD->IdentifierNamespace = Record.readInt();
776 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
777 // after everything else is read.
779 FD->SClass = (StorageClass)Record.readInt();
780 FD->IsInline = Record.readInt();
781 FD->IsInlineSpecified = Record.readInt();
782 FD->IsExplicitSpecified = Record.readInt();
783 FD->IsVirtualAsWritten = Record.readInt();
784 FD->IsPure = Record.readInt();
785 FD->HasInheritedPrototype = Record.readInt();
786 FD->HasWrittenPrototype = Record.readInt();
787 FD->IsDeleted = Record.readInt();
788 FD->IsTrivial = Record.readInt();
789 FD->IsDefaulted = Record.readInt();
790 FD->IsExplicitlyDefaulted = Record.readInt();
791 FD->HasImplicitReturnZero = Record.readInt();
792 FD->IsConstexpr = Record.readInt();
793 FD->UsesSEHTry = Record.readInt();
794 FD->HasSkippedBody = Record.readInt();
795 FD->IsLateTemplateParsed = Record.readInt();
796 FD->setCachedLinkage(Linkage(Record.readInt()));
797 FD->EndRangeLoc = ReadSourceLocation();
799 FD->ODRHash = Record.readInt();
800 FD->HasODRHash = true;
802 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
803 case FunctionDecl::TK_NonTemplate:
804 mergeRedeclarable(FD, Redecl);
806 case FunctionDecl::TK_FunctionTemplate:
807 // Merged when we merge the template.
808 FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
810 case FunctionDecl::TK_MemberSpecialization: {
811 FunctionDecl *InstFD = ReadDeclAs<FunctionDecl>();
812 TemplateSpecializationKind TSK =
813 (TemplateSpecializationKind)Record.readInt();
814 SourceLocation POI = ReadSourceLocation();
815 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
816 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
817 mergeRedeclarable(FD, Redecl);
820 case FunctionDecl::TK_FunctionTemplateSpecialization: {
821 FunctionTemplateDecl *Template = ReadDeclAs<FunctionTemplateDecl>();
822 TemplateSpecializationKind TSK =
823 (TemplateSpecializationKind)Record.readInt();
825 // Template arguments.
826 SmallVector<TemplateArgument, 8> TemplArgs;
827 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
829 // Template args as written.
830 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
831 SourceLocation LAngleLoc, RAngleLoc;
832 bool HasTemplateArgumentsAsWritten = Record.readInt();
833 if (HasTemplateArgumentsAsWritten) {
834 unsigned NumTemplateArgLocs = Record.readInt();
835 TemplArgLocs.reserve(NumTemplateArgLocs);
836 for (unsigned i=0; i != NumTemplateArgLocs; ++i)
837 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
839 LAngleLoc = ReadSourceLocation();
840 RAngleLoc = ReadSourceLocation();
843 SourceLocation POI = ReadSourceLocation();
845 ASTContext &C = Reader.getContext();
846 TemplateArgumentList *TemplArgList
847 = TemplateArgumentList::CreateCopy(C, TemplArgs);
848 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
849 for (unsigned i=0, e = TemplArgLocs.size(); i != e; ++i)
850 TemplArgsInfo.addArgument(TemplArgLocs[i]);
851 FunctionTemplateSpecializationInfo *FTInfo
852 = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
854 HasTemplateArgumentsAsWritten ? &TemplArgsInfo
857 FD->TemplateOrSpecialization = FTInfo;
859 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
860 // The template that contains the specializations set. It's not safe to
861 // use getCanonicalDecl on Template since it may still be initializing.
862 FunctionTemplateDecl *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
863 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
864 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
865 // FunctionTemplateSpecializationInfo's Profile().
866 // We avoid getASTContext because a decl in the parent hierarchy may
868 llvm::FoldingSetNodeID ID;
869 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
870 void *InsertPos = nullptr;
871 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
872 FunctionTemplateSpecializationInfo *ExistingInfo =
873 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
875 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
877 assert(Reader.getContext().getLangOpts().Modules &&
878 "already deserialized this template specialization");
879 mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
884 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
886 UnresolvedSet<8> TemplDecls;
887 unsigned NumTemplates = Record.readInt();
888 while (NumTemplates--)
889 TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
892 TemplateArgumentListInfo TemplArgs;
893 unsigned NumArgs = Record.readInt();
895 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
896 TemplArgs.setLAngleLoc(ReadSourceLocation());
897 TemplArgs.setRAngleLoc(ReadSourceLocation());
899 FD->setDependentTemplateSpecialization(Reader.getContext(),
900 TemplDecls, TemplArgs);
901 // These are not merged; we don't need to merge redeclarations of dependent
907 // Read in the parameters.
908 unsigned NumParams = Record.readInt();
909 SmallVector<ParmVarDecl *, 16> Params;
910 Params.reserve(NumParams);
911 for (unsigned I = 0; I != NumParams; ++I)
912 Params.push_back(ReadDeclAs<ParmVarDecl>());
913 FD->setParams(Reader.getContext(), Params);
916 void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
918 if (Record.readInt()) {
919 // Load the body on-demand. Most clients won't care, because method
920 // definitions rarely show up in headers.
921 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
922 HasPendingBody = true;
923 MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
924 MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
926 MD->setInstanceMethod(Record.readInt());
927 MD->setVariadic(Record.readInt());
928 MD->setPropertyAccessor(Record.readInt());
929 MD->setDefined(Record.readInt());
930 MD->IsOverriding = Record.readInt();
931 MD->HasSkippedBody = Record.readInt();
933 MD->IsRedeclaration = Record.readInt();
934 MD->HasRedeclaration = Record.readInt();
935 if (MD->HasRedeclaration)
936 Reader.getContext().setObjCMethodRedeclaration(MD,
937 ReadDeclAs<ObjCMethodDecl>());
939 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
940 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
941 MD->SetRelatedResultType(Record.readInt());
942 MD->setReturnType(Record.readType());
943 MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
944 MD->DeclEndLoc = ReadSourceLocation();
945 unsigned NumParams = Record.readInt();
946 SmallVector<ParmVarDecl *, 16> Params;
947 Params.reserve(NumParams);
948 for (unsigned I = 0; I != NumParams; ++I)
949 Params.push_back(ReadDeclAs<ParmVarDecl>());
951 MD->SelLocsKind = Record.readInt();
952 unsigned NumStoredSelLocs = Record.readInt();
953 SmallVector<SourceLocation, 16> SelLocs;
954 SelLocs.reserve(NumStoredSelLocs);
955 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
956 SelLocs.push_back(ReadSourceLocation());
958 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
961 void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
962 VisitTypedefNameDecl(D);
964 D->Variance = Record.readInt();
965 D->Index = Record.readInt();
966 D->VarianceLoc = ReadSourceLocation();
967 D->ColonLoc = ReadSourceLocation();
970 void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
972 CD->setAtStartLoc(ReadSourceLocation());
973 CD->setAtEndRange(ReadSourceRange());
976 ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
977 unsigned numParams = Record.readInt();
981 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
982 typeParams.reserve(numParams);
983 for (unsigned i = 0; i != numParams; ++i) {
984 auto typeParam = ReadDeclAs<ObjCTypeParamDecl>();
988 typeParams.push_back(typeParam);
991 SourceLocation lAngleLoc = ReadSourceLocation();
992 SourceLocation rAngleLoc = ReadSourceLocation();
994 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
995 typeParams, rAngleLoc);
998 void ASTDeclReader::ReadObjCDefinitionData(
999 struct ObjCInterfaceDecl::DefinitionData &Data) {
1000 // Read the superclass.
1001 Data.SuperClassTInfo = GetTypeSourceInfo();
1003 Data.EndLoc = ReadSourceLocation();
1004 Data.HasDesignatedInitializers = Record.readInt();
1006 // Read the directly referenced protocols and their SourceLocations.
1007 unsigned NumProtocols = Record.readInt();
1008 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1009 Protocols.reserve(NumProtocols);
1010 for (unsigned I = 0; I != NumProtocols; ++I)
1011 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1012 SmallVector<SourceLocation, 16> ProtoLocs;
1013 ProtoLocs.reserve(NumProtocols);
1014 for (unsigned I = 0; I != NumProtocols; ++I)
1015 ProtoLocs.push_back(ReadSourceLocation());
1016 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1017 Reader.getContext());
1019 // Read the transitive closure of protocols referenced by this class.
1020 NumProtocols = Record.readInt();
1022 Protocols.reserve(NumProtocols);
1023 for (unsigned I = 0; I != NumProtocols; ++I)
1024 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1025 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1026 Reader.getContext());
1029 void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1030 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1031 // FIXME: odr checking?
1034 void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1035 RedeclarableResult Redecl = VisitRedeclarable(ID);
1036 VisitObjCContainerDecl(ID);
1037 TypeIDForTypeDecl = Record.getGlobalTypeID(Record.readInt());
1038 mergeRedeclarable(ID, Redecl);
1040 ID->TypeParamList = ReadObjCTypeParamList();
1041 if (Record.readInt()) {
1042 // Read the definition.
1043 ID->allocateDefinitionData();
1045 ReadObjCDefinitionData(ID->data());
1046 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1047 if (Canon->Data.getPointer()) {
1048 // If we already have a definition, keep the definition invariant and
1050 MergeDefinitionData(Canon, std::move(ID->data()));
1051 ID->Data = Canon->Data;
1053 // Set the definition data of the canonical declaration, so other
1054 // redeclarations will see it.
1055 ID->getCanonicalDecl()->Data = ID->Data;
1057 // We will rebuild this list lazily.
1058 ID->setIvarList(nullptr);
1061 // Note that we have deserialized a definition.
1062 Reader.PendingDefinitions.insert(ID);
1064 // Note that we've loaded this Objective-C class.
1065 Reader.ObjCClassesLoaded.push_back(ID);
1067 ID->Data = ID->getCanonicalDecl()->Data;
1071 void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1072 VisitFieldDecl(IVD);
1073 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1074 // This field will be built lazily.
1075 IVD->setNextIvar(nullptr);
1076 bool synth = Record.readInt();
1077 IVD->setSynthesize(synth);
1080 void ASTDeclReader::ReadObjCDefinitionData(
1081 struct ObjCProtocolDecl::DefinitionData &Data) {
1083 unsigned NumProtoRefs = Record.readInt();
1084 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1085 ProtoRefs.reserve(NumProtoRefs);
1086 for (unsigned I = 0; I != NumProtoRefs; ++I)
1087 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1088 SmallVector<SourceLocation, 16> ProtoLocs;
1089 ProtoLocs.reserve(NumProtoRefs);
1090 for (unsigned I = 0; I != NumProtoRefs; ++I)
1091 ProtoLocs.push_back(ReadSourceLocation());
1092 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1093 ProtoLocs.data(), Reader.getContext());
1096 void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1097 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1098 // FIXME: odr checking?
1101 void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1102 RedeclarableResult Redecl = VisitRedeclarable(PD);
1103 VisitObjCContainerDecl(PD);
1104 mergeRedeclarable(PD, Redecl);
1106 if (Record.readInt()) {
1107 // Read the definition.
1108 PD->allocateDefinitionData();
1110 ReadObjCDefinitionData(PD->data());
1112 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1113 if (Canon->Data.getPointer()) {
1114 // If we already have a definition, keep the definition invariant and
1116 MergeDefinitionData(Canon, std::move(PD->data()));
1117 PD->Data = Canon->Data;
1119 // Set the definition data of the canonical declaration, so other
1120 // redeclarations will see it.
1121 PD->getCanonicalDecl()->Data = PD->Data;
1123 // Note that we have deserialized a definition.
1124 Reader.PendingDefinitions.insert(PD);
1126 PD->Data = PD->getCanonicalDecl()->Data;
1130 void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1134 void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1135 VisitObjCContainerDecl(CD);
1136 CD->setCategoryNameLoc(ReadSourceLocation());
1137 CD->setIvarLBraceLoc(ReadSourceLocation());
1138 CD->setIvarRBraceLoc(ReadSourceLocation());
1140 // Note that this category has been deserialized. We do this before
1141 // deserializing the interface declaration, so that it will consider this
1143 Reader.CategoriesDeserialized.insert(CD);
1145 CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1146 CD->TypeParamList = ReadObjCTypeParamList();
1147 unsigned NumProtoRefs = Record.readInt();
1148 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1149 ProtoRefs.reserve(NumProtoRefs);
1150 for (unsigned I = 0; I != NumProtoRefs; ++I)
1151 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1152 SmallVector<SourceLocation, 16> ProtoLocs;
1153 ProtoLocs.reserve(NumProtoRefs);
1154 for (unsigned I = 0; I != NumProtoRefs; ++I)
1155 ProtoLocs.push_back(ReadSourceLocation());
1156 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1157 Reader.getContext());
1160 void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1161 VisitNamedDecl(CAD);
1162 CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1165 void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1167 D->setAtLoc(ReadSourceLocation());
1168 D->setLParenLoc(ReadSourceLocation());
1169 QualType T = Record.readType();
1170 TypeSourceInfo *TSI = GetTypeSourceInfo();
1172 D->setPropertyAttributes(
1173 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1174 D->setPropertyAttributesAsWritten(
1175 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1176 D->setPropertyImplementation(
1177 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1178 DeclarationName GetterName = Record.readDeclarationName();
1179 SourceLocation GetterLoc = ReadSourceLocation();
1180 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1181 DeclarationName SetterName = Record.readDeclarationName();
1182 SourceLocation SetterLoc = ReadSourceLocation();
1183 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1184 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1185 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1186 D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1189 void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1190 VisitObjCContainerDecl(D);
1191 D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1194 void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1195 VisitObjCImplDecl(D);
1196 D->CategoryNameLoc = ReadSourceLocation();
1199 void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1200 VisitObjCImplDecl(D);
1201 D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1202 D->SuperLoc = ReadSourceLocation();
1203 D->setIvarLBraceLoc(ReadSourceLocation());
1204 D->setIvarRBraceLoc(ReadSourceLocation());
1205 D->setHasNonZeroConstructors(Record.readInt());
1206 D->setHasDestructors(Record.readInt());
1207 D->NumIvarInitializers = Record.readInt();
1208 if (D->NumIvarInitializers)
1209 D->IvarInitializers = ReadGlobalOffset();
1212 void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1214 D->setAtLoc(ReadSourceLocation());
1215 D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1216 D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1217 D->IvarLoc = ReadSourceLocation();
1218 D->setGetterCXXConstructor(Record.readExpr());
1219 D->setSetterCXXAssignment(Record.readExpr());
1222 void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1223 VisitDeclaratorDecl(FD);
1224 FD->Mutable = Record.readInt();
1226 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1227 FD->InitStorage.setInt(ISK);
1228 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1229 ? Record.readType().getAsOpaquePtr()
1230 : Record.readExpr());
1233 if (auto *BW = Record.readExpr())
1234 FD->setBitWidth(BW);
1236 if (!FD->getDeclName()) {
1237 if (FieldDecl *Tmpl = ReadDeclAs<FieldDecl>())
1238 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1243 void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1244 VisitDeclaratorDecl(PD);
1245 PD->GetterId = Record.getIdentifierInfo();
1246 PD->SetterId = Record.getIdentifierInfo();
1249 void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1252 FD->ChainingSize = Record.readInt();
1253 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1254 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1256 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1257 FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1262 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1263 RedeclarableResult Redecl = VisitRedeclarable(VD);
1264 VisitDeclaratorDecl(VD);
1266 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1267 VD->VarDeclBits.TSCSpec = Record.readInt();
1268 VD->VarDeclBits.InitStyle = Record.readInt();
1269 if (!isa<ParmVarDecl>(VD)) {
1270 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1272 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1273 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1274 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1275 VD->NonParmVarDeclBits.ARCPseudoStrong = Record.readInt();
1276 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1277 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1278 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1279 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1280 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1281 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1283 Linkage VarLinkage = Linkage(Record.readInt());
1284 VD->setCachedLinkage(VarLinkage);
1286 // Reconstruct the one piece of the IdentifierNamespace that we need.
1287 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1288 VD->getLexicalDeclContext()->isFunctionOrMethod())
1289 VD->setLocalExternDecl();
1291 if (uint64_t Val = Record.readInt()) {
1292 VD->setInit(Record.readExpr());
1293 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1294 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1295 Eval->CheckedICE = true;
1296 Eval->IsICE = Val == 3;
1300 if (VD->getStorageDuration() == SD_Static && Record.readInt())
1301 Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1304 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1306 switch ((VarKind)Record.readInt()) {
1307 case VarNotTemplate:
1308 // Only true variables (not parameters or implicit parameters) can be
1309 // merged; the other kinds are not really redeclarable at all.
1310 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1311 !isa<VarTemplateSpecializationDecl>(VD))
1312 mergeRedeclarable(VD, Redecl);
1315 // Merged when we merge the template.
1316 VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1318 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1319 VarDecl *Tmpl = ReadDeclAs<VarDecl>();
1320 TemplateSpecializationKind TSK =
1321 (TemplateSpecializationKind)Record.readInt();
1322 SourceLocation POI = ReadSourceLocation();
1323 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1324 mergeRedeclarable(VD, Redecl);
1332 void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1336 void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1338 unsigned isObjCMethodParam = Record.readInt();
1339 unsigned scopeDepth = Record.readInt();
1340 unsigned scopeIndex = Record.readInt();
1341 unsigned declQualifier = Record.readInt();
1342 if (isObjCMethodParam) {
1343 assert(scopeDepth == 0);
1344 PD->setObjCMethodScopeInfo(scopeIndex);
1345 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1347 PD->setScopeInfo(scopeDepth, scopeIndex);
1349 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1350 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1351 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1352 PD->setUninstantiatedDefaultArg(Record.readExpr());
1354 // FIXME: If this is a redeclaration of a function from another module, handle
1355 // inheritance of default arguments.
1358 void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1360 BindingDecl **BDs = DD->getTrailingObjects<BindingDecl*>();
1361 for (unsigned I = 0; I != DD->NumBindings; ++I)
1362 BDs[I] = ReadDeclAs<BindingDecl>();
1365 void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1367 BD->Binding = Record.readExpr();
1370 void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1372 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1373 AD->setRParenLoc(ReadSourceLocation());
1376 void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1378 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1379 BD->setSignatureAsWritten(GetTypeSourceInfo());
1380 unsigned NumParams = Record.readInt();
1381 SmallVector<ParmVarDecl *, 16> Params;
1382 Params.reserve(NumParams);
1383 for (unsigned I = 0; I != NumParams; ++I)
1384 Params.push_back(ReadDeclAs<ParmVarDecl>());
1385 BD->setParams(Params);
1387 BD->setIsVariadic(Record.readInt());
1388 BD->setBlockMissingReturnType(Record.readInt());
1389 BD->setIsConversionFromLambda(Record.readInt());
1391 bool capturesCXXThis = Record.readInt();
1392 unsigned numCaptures = Record.readInt();
1393 SmallVector<BlockDecl::Capture, 16> captures;
1394 captures.reserve(numCaptures);
1395 for (unsigned i = 0; i != numCaptures; ++i) {
1396 VarDecl *decl = ReadDeclAs<VarDecl>();
1397 unsigned flags = Record.readInt();
1398 bool byRef = (flags & 1);
1399 bool nested = (flags & 2);
1400 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1402 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1404 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1407 void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1409 unsigned ContextParamPos = Record.readInt();
1410 CD->setNothrow(Record.readInt() != 0);
1411 // Body is set by VisitCapturedStmt.
1412 for (unsigned I = 0; I < CD->NumParams; ++I) {
1413 if (I != ContextParamPos)
1414 CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1416 CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1420 void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1422 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1423 D->setExternLoc(ReadSourceLocation());
1424 D->setRBraceLoc(ReadSourceLocation());
1427 void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1429 D->RBraceLoc = ReadSourceLocation();
1432 void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1434 D->setLocStart(ReadSourceLocation());
1437 void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1438 RedeclarableResult Redecl = VisitRedeclarable(D);
1440 D->setInline(Record.readInt());
1441 D->LocStart = ReadSourceLocation();
1442 D->RBraceLoc = ReadSourceLocation();
1444 // Defer loading the anonymous namespace until we've finished merging
1445 // this namespace; loading it might load a later declaration of the
1446 // same namespace, and we have an invariant that older declarations
1447 // get merged before newer ones try to merge.
1448 GlobalDeclID AnonNamespace = 0;
1449 if (Redecl.getFirstID() == ThisDeclID) {
1450 AnonNamespace = ReadDeclID();
1452 // Link this namespace back to the first declaration, which has already
1453 // been deserialized.
1454 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1457 mergeRedeclarable(D, Redecl);
1459 if (AnonNamespace) {
1460 // Each module has its own anonymous namespace, which is disjoint from
1461 // any other module's anonymous namespaces, so don't attach the anonymous
1462 // namespace at all.
1463 NamespaceDecl *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1464 if (!Record.isModule())
1465 D->setAnonymousNamespace(Anon);
1469 void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1470 RedeclarableResult Redecl = VisitRedeclarable(D);
1472 D->NamespaceLoc = ReadSourceLocation();
1473 D->IdentLoc = ReadSourceLocation();
1474 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1475 D->Namespace = ReadDeclAs<NamedDecl>();
1476 mergeRedeclarable(D, Redecl);
1479 void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1481 D->setUsingLoc(ReadSourceLocation());
1482 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1483 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1484 D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1485 D->setTypename(Record.readInt());
1486 if (NamedDecl *Pattern = ReadDeclAs<NamedDecl>())
1487 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1491 void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1493 D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1494 NamedDecl **Expansions = D->getTrailingObjects<NamedDecl*>();
1495 for (unsigned I = 0; I != D->NumExpansions; ++I)
1496 Expansions[I] = ReadDeclAs<NamedDecl>();
1500 void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1501 RedeclarableResult Redecl = VisitRedeclarable(D);
1503 D->setTargetDecl(ReadDeclAs<NamedDecl>());
1504 D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1505 UsingShadowDecl *Pattern = ReadDeclAs<UsingShadowDecl>();
1507 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1508 mergeRedeclarable(D, Redecl);
1511 void ASTDeclReader::VisitConstructorUsingShadowDecl(
1512 ConstructorUsingShadowDecl *D) {
1513 VisitUsingShadowDecl(D);
1514 D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1515 D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1516 D->IsVirtual = Record.readInt();
1519 void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1521 D->UsingLoc = ReadSourceLocation();
1522 D->NamespaceLoc = ReadSourceLocation();
1523 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1524 D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1525 D->CommonAncestor = ReadDeclAs<DeclContext>();
1528 void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1530 D->setUsingLoc(ReadSourceLocation());
1531 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1532 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1533 D->EllipsisLoc = ReadSourceLocation();
1537 void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1538 UnresolvedUsingTypenameDecl *D) {
1540 D->TypenameLocation = ReadSourceLocation();
1541 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1542 D->EllipsisLoc = ReadSourceLocation();
1546 void ASTDeclReader::ReadCXXDefinitionData(
1547 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1548 // Note: the caller has deserialized the IsLambda bit already.
1549 Data.UserDeclaredConstructor = Record.readInt();
1550 Data.UserDeclaredSpecialMembers = Record.readInt();
1551 Data.Aggregate = Record.readInt();
1552 Data.PlainOldData = Record.readInt();
1553 Data.Empty = Record.readInt();
1554 Data.Polymorphic = Record.readInt();
1555 Data.Abstract = Record.readInt();
1556 Data.IsStandardLayout = Record.readInt();
1557 Data.HasNoNonEmptyBases = Record.readInt();
1558 Data.HasPrivateFields = Record.readInt();
1559 Data.HasProtectedFields = Record.readInt();
1560 Data.HasPublicFields = Record.readInt();
1561 Data.HasMutableFields = Record.readInt();
1562 Data.HasVariantMembers = Record.readInt();
1563 Data.HasOnlyCMembers = Record.readInt();
1564 Data.HasInClassInitializer = Record.readInt();
1565 Data.HasUninitializedReferenceMember = Record.readInt();
1566 Data.HasUninitializedFields = Record.readInt();
1567 Data.HasInheritedConstructor = Record.readInt();
1568 Data.HasInheritedAssignment = Record.readInt();
1569 Data.NeedOverloadResolutionForCopyConstructor = Record.readInt();
1570 Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1571 Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1572 Data.NeedOverloadResolutionForDestructor = Record.readInt();
1573 Data.DefaultedCopyConstructorIsDeleted = Record.readInt();
1574 Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1575 Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1576 Data.DefaultedDestructorIsDeleted = Record.readInt();
1577 Data.HasTrivialSpecialMembers = Record.readInt();
1578 Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1579 Data.HasIrrelevantDestructor = Record.readInt();
1580 Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1581 Data.HasDefaultedDefaultConstructor = Record.readInt();
1582 Data.CanPassInRegisters = Record.readInt();
1583 Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1584 Data.HasConstexprDefaultConstructor = Record.readInt();
1585 Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1586 Data.ComputedVisibleConversions = Record.readInt();
1587 Data.UserProvidedDefaultConstructor = Record.readInt();
1588 Data.DeclaredSpecialMembers = Record.readInt();
1589 Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1590 Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1591 Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1592 Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1593 Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1594 Data.ODRHash = Record.readInt();
1595 Data.HasODRHash = true;
1597 if (Record.readInt())
1598 Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1600 Data.NumBases = Record.readInt();
1602 Data.Bases = ReadGlobalOffset();
1603 Data.NumVBases = Record.readInt();
1605 Data.VBases = ReadGlobalOffset();
1607 Record.readUnresolvedSet(Data.Conversions);
1608 Record.readUnresolvedSet(Data.VisibleConversions);
1609 assert(Data.Definition && "Data.Definition should be already set!");
1610 Data.FirstFriend = ReadDeclID();
1612 if (Data.IsLambda) {
1613 typedef LambdaCapture Capture;
1614 CXXRecordDecl::LambdaDefinitionData &Lambda
1615 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1616 Lambda.Dependent = Record.readInt();
1617 Lambda.IsGenericLambda = Record.readInt();
1618 Lambda.CaptureDefault = Record.readInt();
1619 Lambda.NumCaptures = Record.readInt();
1620 Lambda.NumExplicitCaptures = Record.readInt();
1621 Lambda.ManglingNumber = Record.readInt();
1622 Lambda.ContextDecl = ReadDeclID();
1623 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1624 sizeof(Capture) * Lambda.NumCaptures);
1625 Capture *ToCapture = Lambda.Captures;
1626 Lambda.MethodTyInfo = GetTypeSourceInfo();
1627 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1628 SourceLocation Loc = ReadSourceLocation();
1629 bool IsImplicit = Record.readInt();
1630 LambdaCaptureKind Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1635 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1639 VarDecl *Var = ReadDeclAs<VarDecl>();
1640 SourceLocation EllipsisLoc = ReadSourceLocation();
1641 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1648 void ASTDeclReader::MergeDefinitionData(
1649 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1650 assert(D->DefinitionData &&
1651 "merging class definition into non-definition");
1652 auto &DD = *D->DefinitionData;
1654 if (DD.Definition != MergeDD.Definition) {
1655 // Track that we merged the definitions.
1656 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1658 Reader.PendingDefinitions.erase(MergeDD.Definition);
1659 MergeDD.Definition->IsCompleteDefinition = false;
1660 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1661 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1662 "already loaded pending lookups for merged definition");
1665 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1666 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1667 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1668 // We faked up this definition data because we found a class for which we'd
1669 // not yet loaded the definition. Replace it with the real thing now.
1670 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1671 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1673 // Don't change which declaration is the definition; that is required
1674 // to be invariant once we select it.
1675 auto *Def = DD.Definition;
1676 DD = std::move(MergeDD);
1677 DD.Definition = Def;
1681 // FIXME: Move this out into a .def file?
1682 bool DetectedOdrViolation = false;
1683 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1684 #define MATCH_FIELD(Field) \
1685 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1687 MATCH_FIELD(UserDeclaredConstructor)
1688 MATCH_FIELD(UserDeclaredSpecialMembers)
1689 MATCH_FIELD(Aggregate)
1690 MATCH_FIELD(PlainOldData)
1692 MATCH_FIELD(Polymorphic)
1693 MATCH_FIELD(Abstract)
1694 MATCH_FIELD(IsStandardLayout)
1695 MATCH_FIELD(HasNoNonEmptyBases)
1696 MATCH_FIELD(HasPrivateFields)
1697 MATCH_FIELD(HasProtectedFields)
1698 MATCH_FIELD(HasPublicFields)
1699 MATCH_FIELD(HasMutableFields)
1700 MATCH_FIELD(HasVariantMembers)
1701 MATCH_FIELD(HasOnlyCMembers)
1702 MATCH_FIELD(HasInClassInitializer)
1703 MATCH_FIELD(HasUninitializedReferenceMember)
1704 MATCH_FIELD(HasUninitializedFields)
1705 MATCH_FIELD(HasInheritedConstructor)
1706 MATCH_FIELD(HasInheritedAssignment)
1707 MATCH_FIELD(NeedOverloadResolutionForCopyConstructor)
1708 MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1709 MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1710 MATCH_FIELD(NeedOverloadResolutionForDestructor)
1711 MATCH_FIELD(DefaultedCopyConstructorIsDeleted)
1712 MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1713 MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1714 MATCH_FIELD(DefaultedDestructorIsDeleted)
1715 OR_FIELD(HasTrivialSpecialMembers)
1716 OR_FIELD(DeclaredNonTrivialSpecialMembers)
1717 MATCH_FIELD(HasIrrelevantDestructor)
1718 OR_FIELD(HasConstexprNonCopyMoveConstructor)
1719 OR_FIELD(HasDefaultedDefaultConstructor)
1720 MATCH_FIELD(CanPassInRegisters)
1721 MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1722 OR_FIELD(HasConstexprDefaultConstructor)
1723 MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1724 // ComputedVisibleConversions is handled below.
1725 MATCH_FIELD(UserProvidedDefaultConstructor)
1726 OR_FIELD(DeclaredSpecialMembers)
1727 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1728 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1729 MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1730 OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1731 OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1732 MATCH_FIELD(IsLambda)
1736 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1737 DetectedOdrViolation = true;
1738 // FIXME: Issue a diagnostic if the base classes don't match when we come
1739 // to lazily load them.
1741 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1742 // match when we come to lazily load them.
1743 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1744 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1745 DD.ComputedVisibleConversions = true;
1748 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1752 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1753 // when they occur within the body of a function template specialization).
1756 if (D->getODRHash() != MergeDD.ODRHash) {
1757 DetectedOdrViolation = true;
1760 if (DetectedOdrViolation)
1761 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1762 {MergeDD.Definition, &MergeDD});
1765 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1766 struct CXXRecordDecl::DefinitionData *DD;
1767 ASTContext &C = Reader.getContext();
1769 // Determine whether this is a lambda closure type, so that we can
1770 // allocate the appropriate DefinitionData structure.
1771 bool IsLambda = Record.readInt();
1773 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1776 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1778 ReadCXXDefinitionData(*DD, D);
1780 // We might already have a definition for this record. This can happen either
1781 // because we're reading an update record, or because we've already done some
1782 // merging. Either way, just merge into it.
1783 CXXRecordDecl *Canon = D->getCanonicalDecl();
1784 if (Canon->DefinitionData) {
1785 MergeDefinitionData(Canon, std::move(*DD));
1786 D->DefinitionData = Canon->DefinitionData;
1790 // Mark this declaration as being a definition.
1791 D->IsCompleteDefinition = true;
1792 D->DefinitionData = DD;
1794 // If this is not the first declaration or is an update record, we can have
1795 // other redeclarations already. Make a note that we need to propagate the
1796 // DefinitionData pointer onto them.
1797 if (Update || Canon != D) {
1798 Canon->DefinitionData = D->DefinitionData;
1799 Reader.PendingDefinitions.insert(D);
1803 ASTDeclReader::RedeclarableResult
1804 ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1805 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1807 ASTContext &C = Reader.getContext();
1810 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1812 switch ((CXXRecKind)Record.readInt()) {
1813 case CXXRecNotTemplate:
1814 // Merged when we merge the folding set entry in the primary template.
1815 if (!isa<ClassTemplateSpecializationDecl>(D))
1816 mergeRedeclarable(D, Redecl);
1818 case CXXRecTemplate: {
1819 // Merged when we merge the template.
1820 ClassTemplateDecl *Template = ReadDeclAs<ClassTemplateDecl>();
1821 D->TemplateOrInstantiation = Template;
1822 if (!Template->getTemplatedDecl()) {
1823 // We've not actually loaded the ClassTemplateDecl yet, because we're
1824 // currently being loaded as its pattern. Rely on it to set up our
1825 // TypeForDecl (see VisitClassTemplateDecl).
1827 // Beware: we do not yet know our canonical declaration, and may still
1828 // get merged once the surrounding class template has got off the ground.
1829 TypeIDForTypeDecl = 0;
1833 case CXXRecMemberSpecialization: {
1834 CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>();
1835 TemplateSpecializationKind TSK =
1836 (TemplateSpecializationKind)Record.readInt();
1837 SourceLocation POI = ReadSourceLocation();
1838 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1839 MSI->setPointOfInstantiation(POI);
1840 D->TemplateOrInstantiation = MSI;
1841 mergeRedeclarable(D, Redecl);
1846 bool WasDefinition = Record.readInt();
1848 ReadCXXRecordDefinition(D, /*Update*/false);
1850 // Propagate DefinitionData pointer from the canonical declaration.
1851 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1853 // Lazily load the key function to avoid deserializing every method so we can
1855 if (WasDefinition) {
1856 DeclID KeyFn = ReadDeclID();
1857 if (KeyFn && D->IsCompleteDefinition)
1858 // FIXME: This is wrong for the ARM ABI, where some other module may have
1859 // made this function no longer be a key function. We need an update
1860 // record or similar for that case.
1861 C.KeyFunctions[D] = KeyFn;
1867 void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1868 VisitFunctionDecl(D);
1869 D->IsCopyDeductionCandidate = Record.readInt();
1872 void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1873 VisitFunctionDecl(D);
1875 unsigned NumOverridenMethods = Record.readInt();
1876 if (D->isCanonicalDecl()) {
1877 while (NumOverridenMethods--) {
1878 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1879 // MD may be initializing.
1880 if (CXXMethodDecl *MD = ReadDeclAs<CXXMethodDecl>())
1881 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1884 // We don't care about which declarations this used to override; we get
1885 // the relevant information from the canonical declaration.
1886 Record.skipInts(NumOverridenMethods);
1890 void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1891 // We need the inherited constructor information to merge the declaration,
1892 // so we have to read it before we call VisitCXXMethodDecl.
1893 if (D->isInheritingConstructor()) {
1894 auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1895 auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1896 *D->getTrailingObjects<InheritedConstructor>() =
1897 InheritedConstructor(Shadow, Ctor);
1900 VisitCXXMethodDecl(D);
1903 void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1904 VisitCXXMethodDecl(D);
1906 if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
1907 auto *Canon = cast<CXXDestructorDecl>(D->getCanonicalDecl());
1908 auto *ThisArg = Record.readExpr();
1909 // FIXME: Check consistency if we have an old and new operator delete.
1910 if (!Canon->OperatorDelete) {
1911 Canon->OperatorDelete = OperatorDelete;
1912 Canon->OperatorDeleteThisArg = ThisArg;
1917 void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1918 VisitCXXMethodDecl(D);
1921 void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1923 D->ImportedAndComplete.setPointer(readModule());
1924 D->ImportedAndComplete.setInt(Record.readInt());
1925 SourceLocation *StoredLocs = D->getTrailingObjects<SourceLocation>();
1926 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1927 StoredLocs[I] = ReadSourceLocation();
1928 Record.skipInts(1); // The number of stored source locations.
1931 void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1933 D->setColonLoc(ReadSourceLocation());
1936 void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1938 if (Record.readInt()) // hasFriendDecl
1939 D->Friend = ReadDeclAs<NamedDecl>();
1941 D->Friend = GetTypeSourceInfo();
1942 for (unsigned i = 0; i != D->NumTPLists; ++i)
1943 D->getTrailingObjects<TemplateParameterList *>()[i] =
1944 Record.readTemplateParameterList();
1945 D->NextFriend = ReadDeclID();
1946 D->UnsupportedFriend = (Record.readInt() != 0);
1947 D->FriendLoc = ReadSourceLocation();
1950 void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1952 unsigned NumParams = Record.readInt();
1953 D->NumParams = NumParams;
1954 D->Params = new TemplateParameterList*[NumParams];
1955 for (unsigned i = 0; i != NumParams; ++i)
1956 D->Params[i] = Record.readTemplateParameterList();
1957 if (Record.readInt()) // HasFriendDecl
1958 D->Friend = ReadDeclAs<NamedDecl>();
1960 D->Friend = GetTypeSourceInfo();
1961 D->FriendLoc = ReadSourceLocation();
1964 DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
1967 DeclID PatternID = ReadDeclID();
1968 NamedDecl *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
1969 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
1970 // FIXME handle associated constraints
1971 D->init(TemplatedDecl, TemplateParams);
1976 ASTDeclReader::RedeclarableResult
1977 ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1978 RedeclarableResult Redecl = VisitRedeclarable(D);
1980 // Make sure we've allocated the Common pointer first. We do this before
1981 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
1982 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
1983 if (!CanonD->Common) {
1984 CanonD->Common = CanonD->newCommon(Reader.getContext());
1985 Reader.PendingDefinitions.insert(CanonD);
1987 D->Common = CanonD->Common;
1989 // If this is the first declaration of the template, fill in the information
1990 // for the 'common' pointer.
1991 if (ThisDeclID == Redecl.getFirstID()) {
1992 if (RedeclarableTemplateDecl *RTD
1993 = ReadDeclAs<RedeclarableTemplateDecl>()) {
1994 assert(RTD->getKind() == D->getKind() &&
1995 "InstantiatedFromMemberTemplate kind mismatch");
1996 D->setInstantiatedFromMemberTemplate(RTD);
1997 if (Record.readInt())
1998 D->setMemberSpecialization();
2002 DeclID PatternID = VisitTemplateDecl(D);
2003 D->IdentifierNamespace = Record.readInt();
2005 mergeRedeclarable(D, Redecl, PatternID);
2007 // If we merged the template with a prior declaration chain, merge the common
2009 // FIXME: Actually merge here, don't just overwrite.
2010 D->Common = D->getCanonicalDecl()->Common;
2015 void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2016 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2018 if (ThisDeclID == Redecl.getFirstID()) {
2019 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2020 // the specializations.
2021 SmallVector<serialization::DeclID, 32> SpecIDs;
2022 ReadDeclIDList(SpecIDs);
2023 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2026 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2027 // We were loaded before our templated declaration was. We've not set up
2028 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2030 Reader.getContext().getInjectedClassNameType(
2031 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2035 void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2036 llvm_unreachable("BuiltinTemplates are not serialized");
2039 /// TODO: Unify with ClassTemplateDecl version?
2040 /// May require unifying ClassTemplateDecl and
2041 /// VarTemplateDecl beyond TemplateDecl...
2042 void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2043 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2045 if (ThisDeclID == Redecl.getFirstID()) {
2046 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2047 // the specializations.
2048 SmallVector<serialization::DeclID, 32> SpecIDs;
2049 ReadDeclIDList(SpecIDs);
2050 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2054 ASTDeclReader::RedeclarableResult
2055 ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2056 ClassTemplateSpecializationDecl *D) {
2057 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2059 ASTContext &C = Reader.getContext();
2060 if (Decl *InstD = ReadDecl()) {
2061 if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2062 D->SpecializedTemplate = CTD;
2064 SmallVector<TemplateArgument, 8> TemplArgs;
2065 Record.readTemplateArgumentList(TemplArgs);
2066 TemplateArgumentList *ArgList
2067 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2068 ClassTemplateSpecializationDecl::SpecializedPartialSpecialization *PS
2069 = new (C) ClassTemplateSpecializationDecl::
2070 SpecializedPartialSpecialization();
2071 PS->PartialSpecialization
2072 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2073 PS->TemplateArgs = ArgList;
2074 D->SpecializedTemplate = PS;
2078 SmallVector<TemplateArgument, 8> TemplArgs;
2079 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2080 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2081 D->PointOfInstantiation = ReadSourceLocation();
2082 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2084 bool writtenAsCanonicalDecl = Record.readInt();
2085 if (writtenAsCanonicalDecl) {
2086 ClassTemplateDecl *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2087 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2088 // Set this as, or find, the canonical declaration for this specialization
2089 ClassTemplateSpecializationDecl *CanonSpec;
2090 if (ClassTemplatePartialSpecializationDecl *Partial =
2091 dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2092 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2093 .GetOrInsertNode(Partial);
2096 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2098 // If there was already a canonical specialization, merge into it.
2099 if (CanonSpec != D) {
2100 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2102 // This declaration might be a definition. Merge with any existing
2104 if (auto *DDD = D->DefinitionData) {
2105 if (CanonSpec->DefinitionData)
2106 MergeDefinitionData(CanonSpec, std::move(*DDD));
2108 CanonSpec->DefinitionData = D->DefinitionData;
2110 D->DefinitionData = CanonSpec->DefinitionData;
2116 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2117 ClassTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo
2118 = new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2119 ExplicitInfo->TypeAsWritten = TyInfo;
2120 ExplicitInfo->ExternLoc = ReadSourceLocation();
2121 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2122 D->ExplicitInfo = ExplicitInfo;
2128 void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2129 ClassTemplatePartialSpecializationDecl *D) {
2130 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2132 D->TemplateParams = Record.readTemplateParameterList();
2133 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2135 // These are read/set from/to the first declaration.
2136 if (ThisDeclID == Redecl.getFirstID()) {
2137 D->InstantiatedFromMember.setPointer(
2138 ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2139 D->InstantiatedFromMember.setInt(Record.readInt());
2143 void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2144 ClassScopeFunctionSpecializationDecl *D) {
2146 D->Specialization = ReadDeclAs<CXXMethodDecl>();
2149 void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2150 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2152 if (ThisDeclID == Redecl.getFirstID()) {
2153 // This FunctionTemplateDecl owns a CommonPtr; read it.
2154 SmallVector<serialization::DeclID, 32> SpecIDs;
2155 ReadDeclIDList(SpecIDs);
2156 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2160 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2161 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2162 /// VarTemplate(Partial)SpecializationDecl with a new data
2163 /// structure Template(Partial)SpecializationDecl, and
2164 /// using Template(Partial)SpecializationDecl as input type.
2165 ASTDeclReader::RedeclarableResult
2166 ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2167 VarTemplateSpecializationDecl *D) {
2168 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2170 ASTContext &C = Reader.getContext();
2171 if (Decl *InstD = ReadDecl()) {
2172 if (VarTemplateDecl *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2173 D->SpecializedTemplate = VTD;
2175 SmallVector<TemplateArgument, 8> TemplArgs;
2176 Record.readTemplateArgumentList(TemplArgs);
2177 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2179 VarTemplateSpecializationDecl::SpecializedPartialSpecialization *PS =
2181 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2182 PS->PartialSpecialization =
2183 cast<VarTemplatePartialSpecializationDecl>(InstD);
2184 PS->TemplateArgs = ArgList;
2185 D->SpecializedTemplate = PS;
2190 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2191 VarTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo =
2192 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2193 ExplicitInfo->TypeAsWritten = TyInfo;
2194 ExplicitInfo->ExternLoc = ReadSourceLocation();
2195 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2196 D->ExplicitInfo = ExplicitInfo;
2199 SmallVector<TemplateArgument, 8> TemplArgs;
2200 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2201 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2202 D->PointOfInstantiation = ReadSourceLocation();
2203 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2204 D->IsCompleteDefinition = Record.readInt();
2206 bool writtenAsCanonicalDecl = Record.readInt();
2207 if (writtenAsCanonicalDecl) {
2208 VarTemplateDecl *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2209 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2210 // FIXME: If it's already present, merge it.
2211 if (VarTemplatePartialSpecializationDecl *Partial =
2212 dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2213 CanonPattern->getCommonPtr()->PartialSpecializations
2214 .GetOrInsertNode(Partial);
2216 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2224 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2225 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2226 /// VarTemplate(Partial)SpecializationDecl with a new data
2227 /// structure Template(Partial)SpecializationDecl, and
2228 /// using Template(Partial)SpecializationDecl as input type.
2229 void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2230 VarTemplatePartialSpecializationDecl *D) {
2231 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2233 D->TemplateParams = Record.readTemplateParameterList();
2234 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2236 // These are read/set from/to the first declaration.
2237 if (ThisDeclID == Redecl.getFirstID()) {
2238 D->InstantiatedFromMember.setPointer(
2239 ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2240 D->InstantiatedFromMember.setInt(Record.readInt());
2244 void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2247 D->setDeclaredWithTypename(Record.readInt());
2249 if (Record.readInt())
2250 D->setDefaultArgument(GetTypeSourceInfo());
2253 void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2254 VisitDeclaratorDecl(D);
2255 // TemplateParmPosition.
2256 D->setDepth(Record.readInt());
2257 D->setPosition(Record.readInt());
2258 if (D->isExpandedParameterPack()) {
2259 auto TypesAndInfos =
2260 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2261 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2262 new (&TypesAndInfos[I].first) QualType(Record.readType());
2263 TypesAndInfos[I].second = GetTypeSourceInfo();
2266 // Rest of NonTypeTemplateParmDecl.
2267 D->ParameterPack = Record.readInt();
2268 if (Record.readInt())
2269 D->setDefaultArgument(Record.readExpr());
2273 void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2274 VisitTemplateDecl(D);
2275 // TemplateParmPosition.
2276 D->setDepth(Record.readInt());
2277 D->setPosition(Record.readInt());
2278 if (D->isExpandedParameterPack()) {
2279 TemplateParameterList **Data =
2280 D->getTrailingObjects<TemplateParameterList *>();
2281 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2283 Data[I] = Record.readTemplateParameterList();
2285 // Rest of TemplateTemplateParmDecl.
2286 D->ParameterPack = Record.readInt();
2287 if (Record.readInt())
2288 D->setDefaultArgument(Reader.getContext(),
2289 Record.readTemplateArgumentLoc());
2293 void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2294 VisitRedeclarableTemplateDecl(D);
2297 void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2299 D->AssertExprAndFailed.setPointer(Record.readExpr());
2300 D->AssertExprAndFailed.setInt(Record.readInt());
2301 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2302 D->RParenLoc = ReadSourceLocation();
2305 void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2309 std::pair<uint64_t, uint64_t>
2310 ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2311 uint64_t LexicalOffset = ReadLocalOffset();
2312 uint64_t VisibleOffset = ReadLocalOffset();
2313 return std::make_pair(LexicalOffset, VisibleOffset);
2316 template <typename T>
2317 ASTDeclReader::RedeclarableResult
2318 ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2319 DeclID FirstDeclID = ReadDeclID();
2320 Decl *MergeWith = nullptr;
2322 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2323 bool IsFirstLocalDecl = false;
2325 uint64_t RedeclOffset = 0;
2327 // 0 indicates that this declaration was the only declaration of its entity,
2328 // and is used for space optimization.
2329 if (FirstDeclID == 0) {
2330 FirstDeclID = ThisDeclID;
2332 IsFirstLocalDecl = true;
2333 } else if (unsigned N = Record.readInt()) {
2334 // This declaration was the first local declaration, but may have imported
2335 // other declarations.
2337 IsFirstLocalDecl = true;
2339 // We have some declarations that must be before us in our redeclaration
2340 // chain. Read them now, and remember that we ought to merge with one of
2342 // FIXME: Provide a known merge target to the second and subsequent such
2344 for (unsigned I = 0; I != N - 1; ++I)
2345 MergeWith = ReadDecl();
2347 RedeclOffset = ReadLocalOffset();
2349 // This declaration was not the first local declaration. Read the first
2350 // local declaration now, to trigger the import of other redeclarations.
2354 T *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2355 if (FirstDecl != D) {
2356 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2357 // We temporarily set the first (canonical) declaration as the previous one
2358 // which is the one that matters and mark the real previous DeclID to be
2359 // loaded & attached later on.
2360 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2361 D->First = FirstDecl->getCanonicalDecl();
2364 T *DAsT = static_cast<T*>(D);
2366 // Note that we need to load local redeclarations of this decl and build a
2367 // decl chain for them. This must happen *after* we perform the preloading
2368 // above; this ensures that the redeclaration chain is built in the correct
2370 if (IsFirstLocalDecl)
2371 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2373 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2376 /// \brief Attempts to merge the given declaration (D) with another declaration
2377 /// of the same entity.
2378 template<typename T>
2379 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2380 RedeclarableResult &Redecl,
2381 DeclID TemplatePatternID) {
2382 // If modules are not available, there is no reason to perform this merge.
2383 if (!Reader.getContext().getLangOpts().Modules)
2386 // If we're not the canonical declaration, we don't need to merge.
2387 if (!DBase->isFirstDecl())
2390 T *D = static_cast<T*>(DBase);
2392 if (auto *Existing = Redecl.getKnownMergeTarget())
2393 // We already know of an existing declaration we should merge with.
2394 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2395 else if (FindExistingResult ExistingRes = findExisting(D))
2396 if (T *Existing = ExistingRes)
2397 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2400 /// \brief "Cast" to type T, asserting if we don't have an implicit conversion.
2401 /// We use this to put code in a template that will only be valid for certain
2403 template<typename T> static T assert_cast(T t) { return t; }
2404 template<typename T> static T assert_cast(...) {
2405 llvm_unreachable("bad assert_cast");
2408 /// \brief Merge together the pattern declarations from two template
2410 void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2411 RedeclarableTemplateDecl *Existing,
2412 DeclID DsID, bool IsKeyDecl) {
2413 auto *DPattern = D->getTemplatedDecl();
2414 auto *ExistingPattern = Existing->getTemplatedDecl();
2415 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2416 DPattern->getCanonicalDecl()->getGlobalID(),
2419 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2420 // Merge with any existing definition.
2421 // FIXME: This is duplicated in several places. Refactor.
2422 auto *ExistingClass =
2423 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2424 if (auto *DDD = DClass->DefinitionData) {
2425 if (ExistingClass->DefinitionData) {
2426 MergeDefinitionData(ExistingClass, std::move(*DDD));
2428 ExistingClass->DefinitionData = DClass->DefinitionData;
2429 // We may have skipped this before because we thought that DClass
2430 // was the canonical declaration.
2431 Reader.PendingDefinitions.insert(DClass);
2434 DClass->DefinitionData = ExistingClass->DefinitionData;
2436 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2439 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2440 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2442 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2443 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2444 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2445 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2447 llvm_unreachable("merged an unknown kind of redeclarable template");
2450 /// \brief Attempts to merge the given declaration (D) with another declaration
2451 /// of the same entity.
2452 template<typename T>
2453 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2454 RedeclarableResult &Redecl,
2455 DeclID TemplatePatternID) {
2456 T *D = static_cast<T*>(DBase);
2457 T *ExistingCanon = Existing->getCanonicalDecl();
2458 T *DCanon = D->getCanonicalDecl();
2459 if (ExistingCanon != DCanon) {
2460 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2461 "already merged this declaration");
2463 // Have our redeclaration link point back at the canonical declaration
2464 // of the existing declaration, so that this declaration has the
2465 // appropriate canonical declaration.
2466 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2467 D->First = ExistingCanon;
2468 ExistingCanon->Used |= D->Used;
2471 // When we merge a namespace, update its pointer to the first namespace.
2472 // We cannot have loaded any redeclarations of this declaration yet, so
2473 // there's nothing else that needs to be updated.
2474 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2475 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2476 assert_cast<NamespaceDecl*>(ExistingCanon));
2478 // When we merge a template, merge its pattern.
2479 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2480 mergeTemplatePattern(
2481 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2482 TemplatePatternID, Redecl.isKeyDecl());
2484 // If this declaration is a key declaration, make a note of that.
2485 if (Redecl.isKeyDecl())
2486 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2490 /// \brief Attempts to merge the given declaration (D) with another declaration
2491 /// of the same entity, for the case where the entity is not actually
2492 /// redeclarable. This happens, for instance, when merging the fields of
2493 /// identical class definitions from two different modules.
2494 template<typename T>
2495 void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2496 // If modules are not available, there is no reason to perform this merge.
2497 if (!Reader.getContext().getLangOpts().Modules)
2500 // ODR-based merging is only performed in C++. In C, identically-named things
2501 // in different translation units are not redeclarations (but may still have
2502 // compatible types).
2503 if (!Reader.getContext().getLangOpts().CPlusPlus)
2506 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2507 if (T *Existing = ExistingRes)
2508 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2509 Existing->getCanonicalDecl());
2512 void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2514 unsigned NumVars = D->varlist_size();
2515 SmallVector<Expr *, 16> Vars;
2516 Vars.reserve(NumVars);
2517 for (unsigned i = 0; i != NumVars; ++i) {
2518 Vars.push_back(Record.readExpr());
2523 void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2525 D->setLocation(ReadSourceLocation());
2526 D->setCombiner(Record.readExpr());
2529 static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt()));
2530 D->PrevDeclInScope = ReadDeclID();
2533 void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2537 //===----------------------------------------------------------------------===//
2538 // Attribute Reading
2539 //===----------------------------------------------------------------------===//
2541 /// \brief Reads attributes from the current stream position.
2542 void ASTReader::ReadAttributes(ASTRecordReader &Record, AttrVec &Attrs) {
2543 for (unsigned i = 0, e = Record.readInt(); i != e; ++i) {
2544 Attr *New = nullptr;
2545 attr::Kind Kind = (attr::Kind)Record.readInt();
2546 SourceRange Range = Record.readSourceRange();
2547 ASTContext &Context = getContext();
2549 #include "clang/Serialization/AttrPCHRead.inc"
2551 assert(New && "Unable to decode attribute?");
2552 Attrs.push_back(New);
2556 //===----------------------------------------------------------------------===//
2557 // ASTReader Implementation
2558 //===----------------------------------------------------------------------===//
2560 /// \brief Note that we have loaded the declaration with the given
2563 /// This routine notes that this declaration has already been loaded,
2564 /// so that future GetDecl calls will return this declaration rather
2565 /// than trying to load a new declaration.
2566 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2567 assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2568 DeclsLoaded[Index] = D;
2572 /// \brief Determine whether the consumer will be interested in seeing
2573 /// this declaration (via HandleTopLevelDecl).
2575 /// This routine should return true for anything that might affect
2576 /// code generation, e.g., inline function definitions, Objective-C
2577 /// declarations with metadata, etc.
2578 static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2579 // An ObjCMethodDecl is never considered as "interesting" because its
2580 // implementation container always is.
2582 // An ImportDecl or VarDecl imported from a module map module will get
2583 // emitted when we import the relevant module.
2584 if (isa<ImportDecl>(D) || isa<VarDecl>(D)) {
2585 auto *M = D->getImportedOwningModule();
2586 if (M && M->Kind == Module::ModuleMapModule &&
2587 Ctx.DeclMustBeEmitted(D))
2591 if (isa<FileScopeAsmDecl>(D) ||
2592 isa<ObjCProtocolDecl>(D) ||
2593 isa<ObjCImplDecl>(D) ||
2594 isa<ImportDecl>(D) ||
2595 isa<PragmaCommentDecl>(D) ||
2596 isa<PragmaDetectMismatchDecl>(D))
2598 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D))
2599 return !D->getDeclContext()->isFunctionOrMethod();
2600 if (VarDecl *Var = dyn_cast<VarDecl>(D))
2601 return Var->isFileVarDecl() &&
2602 Var->isThisDeclarationADefinition() == VarDecl::Definition;
2603 if (FunctionDecl *Func = dyn_cast<FunctionDecl>(D))
2604 return Func->doesThisDeclarationHaveABody() || HasBody;
2606 if (auto *ES = D->getASTContext().getExternalSource())
2607 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2613 /// \brief Get the correct cursor and offset for loading a declaration.
2614 ASTReader::RecordLocation
2615 ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2616 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2617 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2618 ModuleFile *M = I->second;
2619 const DeclOffset &DOffs =
2620 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2621 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2622 return RecordLocation(M, DOffs.BitOffset);
2625 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2626 ContinuousRangeMap<uint64_t, ModuleFile*, 4>::iterator I
2627 = GlobalBitOffsetsMap.find(GlobalOffset);
2629 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2630 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2633 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2634 return LocalOffset + M.GlobalBitOffset;
2637 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2638 const TemplateParameterList *Y);
2640 /// \brief Determine whether two template parameters are similar enough
2641 /// that they may be used in declarations of the same template.
2642 static bool isSameTemplateParameter(const NamedDecl *X,
2643 const NamedDecl *Y) {
2644 if (X->getKind() != Y->getKind())
2647 if (const TemplateTypeParmDecl *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2648 const TemplateTypeParmDecl *TY = cast<TemplateTypeParmDecl>(Y);
2649 return TX->isParameterPack() == TY->isParameterPack();
2652 if (const NonTypeTemplateParmDecl *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2653 const NonTypeTemplateParmDecl *TY = cast<NonTypeTemplateParmDecl>(Y);
2654 return TX->isParameterPack() == TY->isParameterPack() &&
2655 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2658 const TemplateTemplateParmDecl *TX = cast<TemplateTemplateParmDecl>(X);
2659 const TemplateTemplateParmDecl *TY = cast<TemplateTemplateParmDecl>(Y);
2660 return TX->isParameterPack() == TY->isParameterPack() &&
2661 isSameTemplateParameterList(TX->getTemplateParameters(),
2662 TY->getTemplateParameters());
2665 static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2666 if (auto *NS = X->getAsNamespace())
2668 if (auto *NAS = X->getAsNamespaceAlias())
2669 return NAS->getNamespace();
2673 static bool isSameQualifier(const NestedNameSpecifier *X,
2674 const NestedNameSpecifier *Y) {
2675 if (auto *NSX = getNamespace(X)) {
2676 auto *NSY = getNamespace(Y);
2677 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2679 } else if (X->getKind() != Y->getKind())
2682 // FIXME: For namespaces and types, we're permitted to check that the entity
2683 // is named via the same tokens. We should probably do so.
2684 switch (X->getKind()) {
2685 case NestedNameSpecifier::Identifier:
2686 if (X->getAsIdentifier() != Y->getAsIdentifier())
2689 case NestedNameSpecifier::Namespace:
2690 case NestedNameSpecifier::NamespaceAlias:
2691 // We've already checked that we named the same namespace.
2693 case NestedNameSpecifier::TypeSpec:
2694 case NestedNameSpecifier::TypeSpecWithTemplate:
2695 if (X->getAsType()->getCanonicalTypeInternal() !=
2696 Y->getAsType()->getCanonicalTypeInternal())
2699 case NestedNameSpecifier::Global:
2700 case NestedNameSpecifier::Super:
2704 // Recurse into earlier portion of NNS, if any.
2705 auto *PX = X->getPrefix();
2706 auto *PY = Y->getPrefix();
2708 return isSameQualifier(PX, PY);
2712 /// \brief Determine whether two template parameter lists are similar enough
2713 /// that they may be used in declarations of the same template.
2714 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2715 const TemplateParameterList *Y) {
2716 if (X->size() != Y->size())
2719 for (unsigned I = 0, N = X->size(); I != N; ++I)
2720 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2726 /// Determine whether the attributes we can overload on are identical for A and
2727 /// B. Will ignore any overloadable attrs represented in the type of A and B.
2728 static bool hasSameOverloadableAttrs(const FunctionDecl *A,
2729 const FunctionDecl *B) {
2730 // Note that pass_object_size attributes are represented in the function's
2731 // ExtParameterInfo, so we don't need to check them here.
2733 SmallVector<const EnableIfAttr *, 4> AEnableIfs;
2734 // Since this is an equality check, we can ignore that enable_if attrs show up
2735 // in reverse order.
2736 for (const auto *EIA : A->specific_attrs<EnableIfAttr>())
2737 AEnableIfs.push_back(EIA);
2739 SmallVector<const EnableIfAttr *, 4> BEnableIfs;
2740 for (const auto *EIA : B->specific_attrs<EnableIfAttr>())
2741 BEnableIfs.push_back(EIA);
2743 // Two very common cases: either we have 0 enable_if attrs, or we have an
2744 // unequal number of enable_if attrs.
2745 if (AEnableIfs.empty() && BEnableIfs.empty())
2748 if (AEnableIfs.size() != BEnableIfs.size())
2751 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2752 for (unsigned I = 0, E = AEnableIfs.size(); I != E; ++I) {
2756 AEnableIfs[I]->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2757 BEnableIfs[I]->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2758 if (Cand1ID != Cand2ID)
2765 /// \brief Determine whether the two declarations refer to the same entity.
2766 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2767 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2772 // Must be in the same context.
2773 if (!X->getDeclContext()->getRedeclContext()->Equals(
2774 Y->getDeclContext()->getRedeclContext()))
2777 // Two typedefs refer to the same entity if they have the same underlying
2779 if (TypedefNameDecl *TypedefX = dyn_cast<TypedefNameDecl>(X))
2780 if (TypedefNameDecl *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2781 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2782 TypedefY->getUnderlyingType());
2784 // Must have the same kind.
2785 if (X->getKind() != Y->getKind())
2788 // Objective-C classes and protocols with the same name always match.
2789 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2792 if (isa<ClassTemplateSpecializationDecl>(X)) {
2793 // No need to handle these here: we merge them when adding them to the
2798 // Compatible tags match.
2799 if (TagDecl *TagX = dyn_cast<TagDecl>(X)) {
2800 TagDecl *TagY = cast<TagDecl>(Y);
2801 return (TagX->getTagKind() == TagY->getTagKind()) ||
2802 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2803 TagX->getTagKind() == TTK_Interface) &&
2804 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2805 TagY->getTagKind() == TTK_Interface));
2808 // Functions with the same type and linkage match.
2809 // FIXME: This needs to cope with merging of prototyped/non-prototyped
2811 if (FunctionDecl *FuncX = dyn_cast<FunctionDecl>(X)) {
2812 FunctionDecl *FuncY = cast<FunctionDecl>(Y);
2813 if (CXXConstructorDecl *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
2814 CXXConstructorDecl *CtorY = cast<CXXConstructorDecl>(Y);
2815 if (CtorX->getInheritedConstructor() &&
2816 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
2817 CtorY->getInheritedConstructor().getConstructor()))
2820 ASTContext &C = FuncX->getASTContext();
2821 if (!C.hasSameType(FuncX->getType(), FuncY->getType())) {
2822 // We can get functions with different types on the redecl chain in C++17
2823 // if they have differing exception specifications and at least one of
2824 // the excpetion specs is unresolved.
2825 // FIXME: Do we need to check for C++14 deduced return types here too?
2826 auto *XFPT = FuncX->getType()->getAs<FunctionProtoType>();
2827 auto *YFPT = FuncY->getType()->getAs<FunctionProtoType>();
2828 if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
2829 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
2830 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
2831 C.hasSameFunctionTypeIgnoringExceptionSpec(FuncX->getType(),
2836 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
2837 hasSameOverloadableAttrs(FuncX, FuncY);
2840 // Variables with the same type and linkage match.
2841 if (VarDecl *VarX = dyn_cast<VarDecl>(X)) {
2842 VarDecl *VarY = cast<VarDecl>(Y);
2843 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
2844 ASTContext &C = VarX->getASTContext();
2845 if (C.hasSameType(VarX->getType(), VarY->getType()))
2848 // We can get decls with different types on the redecl chain. Eg.
2849 // template <typename T> struct S { static T Var[]; }; // #1
2850 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
2851 // Only? happens when completing an incomplete array type. In this case
2852 // when comparing #1 and #2 we should go through their element type.
2853 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
2854 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
2855 if (!VarXTy || !VarYTy)
2857 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
2858 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
2863 // Namespaces with the same name and inlinedness match.
2864 if (NamespaceDecl *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
2865 NamespaceDecl *NamespaceY = cast<NamespaceDecl>(Y);
2866 return NamespaceX->isInline() == NamespaceY->isInline();
2869 // Identical template names and kinds match if their template parameter lists
2870 // and patterns match.
2871 if (TemplateDecl *TemplateX = dyn_cast<TemplateDecl>(X)) {
2872 TemplateDecl *TemplateY = cast<TemplateDecl>(Y);
2873 return isSameEntity(TemplateX->getTemplatedDecl(),
2874 TemplateY->getTemplatedDecl()) &&
2875 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
2876 TemplateY->getTemplateParameters());
2879 // Fields with the same name and the same type match.
2880 if (FieldDecl *FDX = dyn_cast<FieldDecl>(X)) {
2881 FieldDecl *FDY = cast<FieldDecl>(Y);
2882 // FIXME: Also check the bitwidth is odr-equivalent, if any.
2883 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
2886 // Indirect fields with the same target field match.
2887 if (auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
2888 auto *IFDY = cast<IndirectFieldDecl>(Y);
2889 return IFDX->getAnonField()->getCanonicalDecl() ==
2890 IFDY->getAnonField()->getCanonicalDecl();
2893 // Enumerators with the same name match.
2894 if (isa<EnumConstantDecl>(X))
2895 // FIXME: Also check the value is odr-equivalent.
2898 // Using shadow declarations with the same target match.
2899 if (UsingShadowDecl *USX = dyn_cast<UsingShadowDecl>(X)) {
2900 UsingShadowDecl *USY = cast<UsingShadowDecl>(Y);
2901 return USX->getTargetDecl() == USY->getTargetDecl();
2904 // Using declarations with the same qualifier match. (We already know that
2905 // the name matches.)
2906 if (auto *UX = dyn_cast<UsingDecl>(X)) {
2907 auto *UY = cast<UsingDecl>(Y);
2908 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2909 UX->hasTypename() == UY->hasTypename() &&
2910 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2912 if (auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
2913 auto *UY = cast<UnresolvedUsingValueDecl>(Y);
2914 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2915 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2917 if (auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
2918 return isSameQualifier(
2920 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
2922 // Namespace alias definitions with the same target match.
2923 if (auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
2924 auto *NAY = cast<NamespaceAliasDecl>(Y);
2925 return NAX->getNamespace()->Equals(NAY->getNamespace());
2931 /// Find the context in which we should search for previous declarations when
2932 /// looking for declarations to merge.
2933 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
2935 if (NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC))
2936 return ND->getOriginalNamespace();
2938 if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) {
2939 // Try to dig out the definition.
2940 auto *DD = RD->DefinitionData;
2942 DD = RD->getCanonicalDecl()->DefinitionData;
2944 // If there's no definition yet, then DC's definition is added by an update
2945 // record, but we've not yet loaded that update record. In this case, we
2946 // commit to DC being the canonical definition now, and will fix this when
2947 // we load the update record.
2949 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
2950 RD->IsCompleteDefinition = true;
2951 RD->DefinitionData = DD;
2952 RD->getCanonicalDecl()->DefinitionData = DD;
2954 // Track that we did this horrible thing so that we can fix it later.
2955 Reader.PendingFakeDefinitionData.insert(
2956 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
2959 return DD->Definition;
2962 if (EnumDecl *ED = dyn_cast<EnumDecl>(DC))
2963 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
2966 // We can see the TU here only if we have no Sema object. In that case,
2967 // there's no TU scope to look in, so using the DC alone is sufficient.
2968 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
2974 ASTDeclReader::FindExistingResult::~FindExistingResult() {
2975 // Record that we had a typedef name for linkage whether or not we merge
2976 // with that declaration.
2977 if (TypedefNameForLinkage) {
2978 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2979 Reader.ImportedTypedefNamesForLinkage.insert(
2980 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
2984 if (!AddResult || Existing)
2987 DeclarationName Name = New->getDeclName();
2988 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2989 if (needsAnonymousDeclarationNumber(New)) {
2990 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
2991 AnonymousDeclNumber, New);
2992 } else if (DC->isTranslationUnit() &&
2993 !Reader.getContext().getLangOpts().CPlusPlus) {
2994 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
2995 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
2997 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
2998 // Add the declaration to its redeclaration context so later merging
2999 // lookups will find it.
3000 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3004 /// Find the declaration that should be merged into, given the declaration found
3005 /// by name lookup. If we're merging an anonymous declaration within a typedef,
3006 /// we need a matching typedef, and we merge with the type inside it.
3007 static NamedDecl *getDeclForMerging(NamedDecl *Found,
3008 bool IsTypedefNameForLinkage) {
3009 if (!IsTypedefNameForLinkage)
3012 // If we found a typedef declaration that gives a name to some other
3013 // declaration, then we want that inner declaration. Declarations from
3014 // AST files are handled via ImportedTypedefNamesForLinkage.
3015 if (Found->isFromASTFile())
3018 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3019 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3024 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3027 // If the lexical context has been merged, look into the now-canonical
3029 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
3032 // If we've seen this before, return the canonical declaration.
3033 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
3034 if (Index < Previous.size() && Previous[Index])
3035 return Previous[Index];
3037 // If this is the first time, but we have parsed a declaration of the context,
3038 // build the anonymous declaration list from the parsed declaration.
3039 if (!cast<Decl>(DC)->isFromASTFile()) {
3040 numberAnonymousDeclsWithin(DC, [&](NamedDecl *ND, unsigned Number) {
3041 if (Previous.size() == Number)
3042 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3044 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3048 return Index < Previous.size() ? Previous[Index] : nullptr;
3051 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3052 DeclContext *DC, unsigned Index,
3054 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
3057 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
3058 if (Index >= Previous.size())
3059 Previous.resize(Index + 1);
3060 if (!Previous[Index])
3061 Previous[Index] = D;
3064 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3065 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3068 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3069 // Don't bother trying to find unnamed declarations that are in
3070 // unmergeable contexts.
3071 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3072 AnonymousDeclNumber, TypedefNameForLinkage);
3077 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3078 if (TypedefNameForLinkage) {
3079 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3080 std::make_pair(DC, TypedefNameForLinkage));
3081 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3082 if (isSameEntity(It->second, D))
3083 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3084 TypedefNameForLinkage);
3085 // Go on to check in other places in case an existing typedef name
3086 // was not imported.
3089 if (needsAnonymousDeclarationNumber(D)) {
3090 // This is an anonymous declaration that we may need to merge. Look it up
3091 // in its context by number.
3092 if (auto *Existing = getAnonymousDeclForMerging(
3093 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3094 if (isSameEntity(Existing, D))
3095 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3096 TypedefNameForLinkage);
3097 } else if (DC->isTranslationUnit() &&
3098 !Reader.getContext().getLangOpts().CPlusPlus) {
3099 IdentifierResolver &IdResolver = Reader.getIdResolver();
3101 // Temporarily consider the identifier to be up-to-date. We don't want to
3102 // cause additional lookups here.
3103 class UpToDateIdentifierRAII {
3108 explicit UpToDateIdentifierRAII(IdentifierInfo *II)
3109 : II(II), WasOutToDate(false)
3112 WasOutToDate = II->isOutOfDate();
3114 II->setOutOfDate(false);
3118 ~UpToDateIdentifierRAII() {
3120 II->setOutOfDate(true);
3122 } UpToDate(Name.getAsIdentifierInfo());
3124 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3125 IEnd = IdResolver.end();
3127 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3128 if (isSameEntity(Existing, D))
3129 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3130 TypedefNameForLinkage);
3132 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3133 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3134 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3135 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3136 if (isSameEntity(Existing, D))
3137 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3138 TypedefNameForLinkage);
3141 // Not in a mergeable context.
3142 return FindExistingResult(Reader);
3145 // If this declaration is from a merged context, make a note that we need to
3146 // check that the canonical definition of that context contains the decl.
3148 // FIXME: We should do something similar if we merge two definitions of the
3149 // same template specialization into the same CXXRecordDecl.
3150 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3151 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3152 MergedDCIt->second == D->getDeclContext())
3153 Reader.PendingOdrMergeChecks.push_back(D);
3155 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3156 AnonymousDeclNumber, TypedefNameForLinkage);
3159 template<typename DeclT>
3160 Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3161 return D->RedeclLink.getLatestNotUpdated();
3163 Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3164 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3167 Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3170 switch (D->getKind()) {
3171 #define ABSTRACT_DECL(TYPE)
3172 #define DECL(TYPE, BASE) \
3174 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3175 #include "clang/AST/DeclNodes.inc"
3177 llvm_unreachable("unknown decl kind");
3180 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3181 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3184 template<typename DeclT>
3185 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3186 Redeclarable<DeclT> *D,
3187 Decl *Previous, Decl *Canon) {
3188 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3189 D->First = cast<DeclT>(Previous)->First;
3194 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3195 Redeclarable<VarDecl> *D,
3196 Decl *Previous, Decl *Canon) {
3197 VarDecl *VD = static_cast<VarDecl*>(D);
3198 VarDecl *PrevVD = cast<VarDecl>(Previous);
3199 D->RedeclLink.setPrevious(PrevVD);
3200 D->First = PrevVD->First;
3202 // We should keep at most one definition on the chain.
3203 // FIXME: Cache the definition once we've found it. Building a chain with
3204 // N definitions currently takes O(N^2) time here.
3205 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3206 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3207 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3208 Reader.mergeDefinitionVisibility(CurD, VD);
3209 VD->demoteThisDefinitionToDeclaration();
3217 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3218 Redeclarable<FunctionDecl> *D,
3219 Decl *Previous, Decl *Canon) {
3220 FunctionDecl *FD = static_cast<FunctionDecl*>(D);
3221 FunctionDecl *PrevFD = cast<FunctionDecl>(Previous);
3223 FD->RedeclLink.setPrevious(PrevFD);
3224 FD->First = PrevFD->First;
3226 // If the previous declaration is an inline function declaration, then this
3227 // declaration is too.
3228 if (PrevFD->IsInline != FD->IsInline) {
3229 // FIXME: [dcl.fct.spec]p4:
3230 // If a function with external linkage is declared inline in one
3231 // translation unit, it shall be declared inline in all translation
3232 // units in which it appears.
3234 // Be careful of this case:
3237 // template<typename T> struct X { void f(); };
3238 // template<typename T> inline void X<T>::f() {}
3240 // module B instantiates the declaration of X<int>::f
3241 // module C instantiates the definition of X<int>::f
3243 // If module B and C are merged, we do not have a violation of this rule.
3244 FD->IsInline = true;
3247 // If we need to propagate an exception specification along the redecl
3248 // chain, make a note of that so that we can do so later.
3249 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3250 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3251 if (FPT && PrevFPT) {
3252 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3253 bool WasUnresolved =
3254 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3255 if (IsUnresolved != WasUnresolved)
3256 Reader.PendingExceptionSpecUpdates.insert(
3257 std::make_pair(Canon, IsUnresolved ? PrevFD : FD));
3260 } // end namespace clang
3262 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3263 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3266 /// Inherit the default template argument from \p From to \p To. Returns
3267 /// \c false if there is no default template for \p From.
3268 template <typename ParmDecl>
3269 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3271 auto *To = cast<ParmDecl>(ToD);
3272 if (!From->hasDefaultArgument())
3274 To->setInheritedDefaultArgument(Context, From);
3278 static void inheritDefaultTemplateArguments(ASTContext &Context,
3281 auto *FromTP = From->getTemplateParameters();
3282 auto *ToTP = To->getTemplateParameters();
3283 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3285 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3286 NamedDecl *FromParam = FromTP->getParam(N - I - 1);
3287 if (FromParam->isParameterPack())
3289 NamedDecl *ToParam = ToTP->getParam(N - I - 1);
3291 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam)) {
3292 if (!inheritDefaultTemplateArgument(Context, FTTP, ToParam))
3294 } else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam)) {
3295 if (!inheritDefaultTemplateArgument(Context, FNTTP, ToParam))
3298 if (!inheritDefaultTemplateArgument(
3299 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam))
3305 void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3306 Decl *Previous, Decl *Canon) {
3307 assert(D && Previous);
3309 switch (D->getKind()) {
3310 #define ABSTRACT_DECL(TYPE)
3311 #define DECL(TYPE, BASE) \
3313 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3315 #include "clang/AST/DeclNodes.inc"
3318 // If the declaration was visible in one module, a redeclaration of it in
3319 // another module remains visible even if it wouldn't be visible by itself.
3321 // FIXME: In this case, the declaration should only be visible if a module
3322 // that makes it visible has been imported.
3323 D->IdentifierNamespace |=
3324 Previous->IdentifierNamespace &
3325 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3327 // If the declaration declares a template, it may inherit default arguments
3328 // from the previous declaration.
3329 if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D))
3330 inheritDefaultTemplateArguments(Reader.getContext(),
3331 cast<TemplateDecl>(Previous), TD);
3334 template<typename DeclT>
3335 void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3336 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3338 void ASTDeclReader::attachLatestDeclImpl(...) {
3339 llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3342 void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3343 assert(D && Latest);
3345 switch (D->getKind()) {
3346 #define ABSTRACT_DECL(TYPE)
3347 #define DECL(TYPE, BASE) \
3349 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3351 #include "clang/AST/DeclNodes.inc"
3355 template<typename DeclT>
3356 void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3357 D->RedeclLink.markIncomplete();
3359 void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3360 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3363 void ASTReader::markIncompleteDeclChain(Decl *D) {
3364 switch (D->getKind()) {
3365 #define ABSTRACT_DECL(TYPE)
3366 #define DECL(TYPE, BASE) \
3368 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3370 #include "clang/AST/DeclNodes.inc"
3374 /// \brief Read the declaration at the given offset from the AST file.
3375 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3376 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3377 SourceLocation DeclLoc;
3378 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3379 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3380 // Keep track of where we are in the stream, then jump back there
3381 // after reading this declaration.
3382 SavedStreamPosition SavedPosition(DeclsCursor);
3384 ReadingKindTracker ReadingKind(Read_Decl, *this);
3386 // Note that we are loading a declaration record.
3387 Deserializing ADecl(this);
3389 DeclsCursor.JumpToBit(Loc.Offset);
3390 ASTRecordReader Record(*this, *Loc.F);
3391 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3392 unsigned Code = DeclsCursor.ReadCode();
3394 ASTContext &Context = getContext();
3396 switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3397 case DECL_CONTEXT_LEXICAL:
3398 case DECL_CONTEXT_VISIBLE:
3399 llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3401 D = TypedefDecl::CreateDeserialized(Context, ID);
3403 case DECL_TYPEALIAS:
3404 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3407 D = EnumDecl::CreateDeserialized(Context, ID);
3410 D = RecordDecl::CreateDeserialized(Context, ID);
3412 case DECL_ENUM_CONSTANT:
3413 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3416 D = FunctionDecl::CreateDeserialized(Context, ID);
3418 case DECL_LINKAGE_SPEC:
3419 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3422 D = ExportDecl::CreateDeserialized(Context, ID);
3425 D = LabelDecl::CreateDeserialized(Context, ID);
3427 case DECL_NAMESPACE:
3428 D = NamespaceDecl::CreateDeserialized(Context, ID);
3430 case DECL_NAMESPACE_ALIAS:
3431 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3434 D = UsingDecl::CreateDeserialized(Context, ID);
3436 case DECL_USING_PACK:
3437 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3439 case DECL_USING_SHADOW:
3440 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3442 case DECL_CONSTRUCTOR_USING_SHADOW:
3443 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3445 case DECL_USING_DIRECTIVE:
3446 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3448 case DECL_UNRESOLVED_USING_VALUE:
3449 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3451 case DECL_UNRESOLVED_USING_TYPENAME:
3452 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3454 case DECL_CXX_RECORD:
3455 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3457 case DECL_CXX_DEDUCTION_GUIDE:
3458 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3460 case DECL_CXX_METHOD:
3461 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3463 case DECL_CXX_CONSTRUCTOR:
3464 D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3466 case DECL_CXX_INHERITED_CONSTRUCTOR:
3467 D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3469 case DECL_CXX_DESTRUCTOR:
3470 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3472 case DECL_CXX_CONVERSION:
3473 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3475 case DECL_ACCESS_SPEC:
3476 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3479 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3481 case DECL_FRIEND_TEMPLATE:
3482 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3484 case DECL_CLASS_TEMPLATE:
3485 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3487 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3488 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3490 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3491 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3493 case DECL_VAR_TEMPLATE:
3494 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3496 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3497 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3499 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3500 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3502 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3503 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3505 case DECL_FUNCTION_TEMPLATE:
3506 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3508 case DECL_TEMPLATE_TYPE_PARM:
3509 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3511 case DECL_NON_TYPE_TEMPLATE_PARM:
3512 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3514 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3515 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3518 case DECL_TEMPLATE_TEMPLATE_PARM:
3519 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3521 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3522 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3525 case DECL_TYPE_ALIAS_TEMPLATE:
3526 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3528 case DECL_STATIC_ASSERT:
3529 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3531 case DECL_OBJC_METHOD:
3532 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3534 case DECL_OBJC_INTERFACE:
3535 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3537 case DECL_OBJC_IVAR:
3538 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3540 case DECL_OBJC_PROTOCOL:
3541 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3543 case DECL_OBJC_AT_DEFS_FIELD:
3544 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3546 case DECL_OBJC_CATEGORY:
3547 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3549 case DECL_OBJC_CATEGORY_IMPL:
3550 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3552 case DECL_OBJC_IMPLEMENTATION:
3553 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3555 case DECL_OBJC_COMPATIBLE_ALIAS:
3556 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3558 case DECL_OBJC_PROPERTY:
3559 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3561 case DECL_OBJC_PROPERTY_IMPL:
3562 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3565 D = FieldDecl::CreateDeserialized(Context, ID);
3567 case DECL_INDIRECTFIELD:
3568 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3571 D = VarDecl::CreateDeserialized(Context, ID);
3573 case DECL_IMPLICIT_PARAM:
3574 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3577 D = ParmVarDecl::CreateDeserialized(Context, ID);
3579 case DECL_DECOMPOSITION:
3580 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3583 D = BindingDecl::CreateDeserialized(Context, ID);
3585 case DECL_FILE_SCOPE_ASM:
3586 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3589 D = BlockDecl::CreateDeserialized(Context, ID);
3591 case DECL_MS_PROPERTY:
3592 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3595 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3597 case DECL_CXX_BASE_SPECIFIERS:
3598 Error("attempt to read a C++ base-specifier record as a declaration");
3600 case DECL_CXX_CTOR_INITIALIZERS:
3601 Error("attempt to read a C++ ctor initializer record as a declaration");
3604 // Note: last entry of the ImportDecl record is the number of stored source
3606 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3608 case DECL_OMP_THREADPRIVATE:
3609 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3611 case DECL_OMP_DECLARE_REDUCTION:
3612 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
3614 case DECL_OMP_CAPTUREDEXPR:
3615 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3617 case DECL_PRAGMA_COMMENT:
3618 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3620 case DECL_PRAGMA_DETECT_MISMATCH:
3621 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
3625 D = EmptyDecl::CreateDeserialized(Context, ID);
3627 case DECL_OBJC_TYPE_PARAM:
3628 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3632 assert(D && "Unknown declaration reading AST file");
3633 LoadedDecl(Index, D);
3634 // Set the DeclContext before doing any deserialization, to make sure internal
3635 // calls to Decl::getASTContext() by Decl's methods will find the
3636 // TranslationUnitDecl without crashing.
3637 D->setDeclContext(Context.getTranslationUnitDecl());
3640 // If this declaration is also a declaration context, get the
3641 // offsets for its tables of lexical and visible declarations.
3642 if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
3643 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3644 if (Offsets.first &&
3645 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3647 if (Offsets.second &&
3648 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3651 assert(Record.getIdx() == Record.size());
3653 // Load any relevant update records.
3654 PendingUpdateRecords.push_back(
3655 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3657 // Load the categories after recursive loading is finished.
3658 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(D))
3659 // If we already have a definition when deserializing the ObjCInterfaceDecl,
3660 // we put the Decl in PendingDefinitions so we can pull the categories here.
3661 if (Class->isThisDeclarationADefinition() ||
3662 PendingDefinitions.count(Class))
3663 loadObjCCategories(ID, Class);
3665 // If we have deserialized a declaration that has a definition the
3666 // AST consumer might need to know about, queue it.
3667 // We don't pass it to the consumer immediately because we may be in recursive
3668 // loading, and some declarations may still be initializing.
3669 PotentiallyInterestingDecls.push_back(
3670 InterestingDecl(D, Reader.hasPendingBody()));
3675 void ASTReader::PassInterestingDeclsToConsumer() {
3678 if (PassingDeclsToConsumer)
3681 // Guard variable to avoid recursively redoing the process of passing
3682 // decls to consumer.
3683 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3686 // Ensure that we've loaded all potentially-interesting declarations
3687 // that need to be eagerly loaded.
3688 for (auto ID : EagerlyDeserializedDecls)
3690 EagerlyDeserializedDecls.clear();
3692 while (!PotentiallyInterestingDecls.empty()) {
3693 InterestingDecl D = PotentiallyInterestingDecls.front();
3694 PotentiallyInterestingDecls.pop_front();
3695 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3696 PassInterestingDeclToConsumer(D.getDecl());
3700 void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3701 // The declaration may have been modified by files later in the chain.
3702 // If this is the case, read the record containing the updates from each file
3703 // and pass it to ASTDeclReader to make the modifications.
3704 serialization::GlobalDeclID ID = Record.ID;
3706 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3707 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3709 llvm::SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3711 if (UpdI != DeclUpdateOffsets.end()) {
3712 auto UpdateOffsets = std::move(UpdI->second);
3713 DeclUpdateOffsets.erase(UpdI);
3715 // Check if this decl was interesting to the consumer. If we just loaded
3716 // the declaration, then we know it was interesting and we skip the call
3717 // to isConsumerInterestedIn because it is unsafe to call in the
3718 // current ASTReader state.
3719 bool WasInteresting =
3720 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
3721 for (auto &FileAndOffset : UpdateOffsets) {
3722 ModuleFile *F = FileAndOffset.first;
3723 uint64_t Offset = FileAndOffset.second;
3724 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3725 SavedStreamPosition SavedPosition(Cursor);
3726 Cursor.JumpToBit(Offset);
3727 unsigned Code = Cursor.ReadCode();
3728 ASTRecordReader Record(*this, *F);
3729 unsigned RecCode = Record.readRecord(Cursor, Code);
3731 assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3733 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
3735 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
3737 // We might have made this declaration interesting. If so, remember that
3738 // we need to hand it off to the consumer.
3739 if (!WasInteresting &&
3740 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
3741 PotentiallyInterestingDecls.push_back(
3742 InterestingDecl(D, Reader.hasPendingBody()));
3743 WasInteresting = true;
3747 // Add the lazy specializations to the template.
3748 assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||
3749 isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&
3750 "Must not have pending specializations");
3751 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
3752 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
3753 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
3754 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
3755 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
3756 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
3757 PendingLazySpecializationIDs.clear();
3759 // Load the pending visible updates for this decl context, if it has any.
3760 auto I = PendingVisibleUpdates.find(ID);
3761 if (I != PendingVisibleUpdates.end()) {
3762 auto VisibleUpdates = std::move(I->second);
3763 PendingVisibleUpdates.erase(I);
3765 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
3766 for (const PendingVisibleUpdate &Update : VisibleUpdates)
3767 Lookups[DC].Table.add(
3768 Update.Mod, Update.Data,
3769 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
3770 DC->setHasExternalVisibleStorage(true);
3774 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
3775 // Attach FirstLocal to the end of the decl chain.
3776 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
3777 if (FirstLocal != CanonDecl) {
3778 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
3779 ASTDeclReader::attachPreviousDecl(
3780 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
3785 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
3789 // Load the list of other redeclarations from this module file.
3790 ModuleFile *M = getOwningModuleFile(FirstLocal);
3791 assert(M && "imported decl from no module file");
3793 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
3794 SavedStreamPosition SavedPosition(Cursor);
3795 Cursor.JumpToBit(LocalOffset);
3798 unsigned Code = Cursor.ReadCode();
3799 unsigned RecCode = Cursor.readRecord(Code, Record);
3801 assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
3803 // FIXME: We have several different dispatches on decl kind here; maybe
3804 // we should instead generate one loop per kind and dispatch up-front?
3805 Decl *MostRecent = FirstLocal;
3806 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
3807 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
3808 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
3811 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
3815 /// \brief Given an ObjC interface, goes through the modules and links to the
3816 /// interface all the categories for it.
3817 class ObjCCategoriesVisitor {
3819 ObjCInterfaceDecl *Interface;
3820 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
3821 ObjCCategoryDecl *Tail;
3822 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
3823 serialization::GlobalDeclID InterfaceID;
3824 unsigned PreviousGeneration;
3826 void add(ObjCCategoryDecl *Cat) {
3827 // Only process each category once.
3828 if (!Deserialized.erase(Cat))
3831 // Check for duplicate categories.
3832 if (Cat->getDeclName()) {
3833 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
3835 Reader.getOwningModuleFile(Existing)
3836 != Reader.getOwningModuleFile(Cat)) {
3837 // FIXME: We should not warn for duplicates in diamond:
3845 // If there are duplicates in ML/MR, there will be warning when
3846 // creating MB *and* when importing MB. We should not warn when
3848 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
3849 << Interface->getDeclName() << Cat->getDeclName();
3850 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
3851 } else if (!Existing) {
3852 // Record this category.
3857 // Add this category to the end of the chain.
3859 ASTDeclReader::setNextObjCCategory(Tail, Cat);
3861 Interface->setCategoryListRaw(Cat);
3866 ObjCCategoriesVisitor(ASTReader &Reader,
3867 ObjCInterfaceDecl *Interface,
3868 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
3869 serialization::GlobalDeclID InterfaceID,
3870 unsigned PreviousGeneration)
3871 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
3872 Tail(nullptr), InterfaceID(InterfaceID),
3873 PreviousGeneration(PreviousGeneration)
3875 // Populate the name -> category map with the set of known categories.
3876 for (auto *Cat : Interface->known_categories()) {
3877 if (Cat->getDeclName())
3878 NameCategoryMap[Cat->getDeclName()] = Cat;
3880 // Keep track of the tail of the category list.
3885 bool operator()(ModuleFile &M) {
3886 // If we've loaded all of the category information we care about from
3887 // this module file, we're done.
3888 if (M.Generation <= PreviousGeneration)
3891 // Map global ID of the definition down to the local ID used in this
3892 // module file. If there is no such mapping, we'll find nothing here
3893 // (or in any module it imports).
3894 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
3898 // Perform a binary search to find the local redeclarations for this
3899 // declaration (if any).
3900 const ObjCCategoriesInfo Compare = { LocalID, 0 };
3901 const ObjCCategoriesInfo *Result
3902 = std::lower_bound(M.ObjCCategoriesMap,
3903 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
3905 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
3906 Result->DefinitionID != LocalID) {
3907 // We didn't find anything. If the class definition is in this module
3908 // file, then the module files it depends on cannot have any categories,
3909 // so suppress further lookup.
3910 return Reader.isDeclIDFromModule(InterfaceID, M);
3913 // We found something. Dig out all of the categories.
3914 unsigned Offset = Result->Offset;
3915 unsigned N = M.ObjCCategories[Offset];
3916 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
3917 for (unsigned I = 0; I != N; ++I)
3918 add(cast_or_null<ObjCCategoryDecl>(
3919 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
3923 } // end anonymous namespace
3925 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
3926 ObjCInterfaceDecl *D,
3927 unsigned PreviousGeneration) {
3928 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
3929 PreviousGeneration);
3930 ModuleMgr.visit(Visitor);
3933 template<typename DeclT, typename Fn>
3934 static void forAllLaterRedecls(DeclT *D, Fn F) {
3937 // Check whether we've already merged D into its redeclaration chain.
3938 // MostRecent may or may not be nullptr if D has not been merged. If
3939 // not, walk the merged redecl chain and see if it's there.
3940 auto *MostRecent = D->getMostRecentDecl();
3942 for (auto *Redecl = MostRecent; Redecl && !Found;
3943 Redecl = Redecl->getPreviousDecl())
3944 Found = (Redecl == D);
3946 // If this declaration is merged, apply the functor to all later decls.
3948 for (auto *Redecl = MostRecent; Redecl != D;
3949 Redecl = Redecl->getPreviousDecl())
3954 void ASTDeclReader::UpdateDecl(Decl *D,
3955 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
3956 while (Record.getIdx() < Record.size()) {
3957 switch ((DeclUpdateKind)Record.readInt()) {
3958 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
3959 auto *RD = cast<CXXRecordDecl>(D);
3960 // FIXME: If we also have an update record for instantiating the
3961 // definition of D, we need that to happen before we get here.
3962 Decl *MD = Record.readDecl();
3963 assert(MD && "couldn't read decl from update record");
3964 // FIXME: We should call addHiddenDecl instead, to add the member
3965 // to its DeclContext.
3966 RD->addedMember(MD);
3970 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
3971 // It will be added to the template's lazy specialization set.
3972 PendingLazySpecializationIDs.push_back(ReadDeclID());
3975 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
3976 NamespaceDecl *Anon = ReadDeclAs<NamespaceDecl>();
3978 // Each module has its own anonymous namespace, which is disjoint from
3979 // any other module's anonymous namespaces, so don't attach the anonymous
3980 // namespace at all.
3981 if (!Record.isModule()) {
3982 if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(D))
3983 TU->setAnonymousNamespace(Anon);
3985 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
3990 case UPD_CXX_ADDED_VAR_DEFINITION: {
3991 VarDecl *VD = cast<VarDecl>(D);
3992 VD->NonParmVarDeclBits.IsInline = Record.readInt();
3993 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
3994 uint64_t Val = Record.readInt();
3995 if (Val && !VD->getInit()) {
3996 VD->setInit(Record.readExpr());
3997 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
3998 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
3999 Eval->CheckedICE = true;
4000 Eval->IsICE = Val == 3;
4006 case UPD_CXX_POINT_OF_INSTANTIATION: {
4007 SourceLocation POI = Record.readSourceLocation();
4008 if (VarTemplateSpecializationDecl *VTSD =
4009 dyn_cast<VarTemplateSpecializationDecl>(D)) {
4010 VTSD->setPointOfInstantiation(POI);
4011 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4012 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4014 auto *FD = cast<FunctionDecl>(D);
4015 if (auto *FTSInfo = FD->TemplateOrSpecialization
4016 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4017 FTSInfo->setPointOfInstantiation(POI);
4019 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4020 ->setPointOfInstantiation(POI);
4025 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4026 auto Param = cast<ParmVarDecl>(D);
4028 // We have to read the default argument regardless of whether we use it
4029 // so that hypothetical further update records aren't messed up.
4030 // TODO: Add a function to skip over the next expr record.
4031 auto DefaultArg = Record.readExpr();
4033 // Only apply the update if the parameter still has an uninstantiated
4034 // default argument.
4035 if (Param->hasUninstantiatedDefaultArg())
4036 Param->setDefaultArg(DefaultArg);
4040 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4041 auto FD = cast<FieldDecl>(D);
4042 auto DefaultInit = Record.readExpr();
4044 // Only apply the update if the field still has an uninstantiated
4045 // default member initializer.
4046 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4048 FD->setInClassInitializer(DefaultInit);
4050 // Instantiation failed. We can get here if we serialized an AST for
4051 // an invalid program.
4052 FD->removeInClassInitializer();
4057 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4058 FunctionDecl *FD = cast<FunctionDecl>(D);
4059 if (Reader.PendingBodies[FD]) {
4060 // FIXME: Maybe check for ODR violations.
4061 // It's safe to stop now because this update record is always last.
4065 if (Record.readInt()) {
4066 // Maintain AST consistency: any later redeclarations of this function
4067 // are inline if this one is. (We might have merged another declaration
4069 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4070 FD->setImplicitlyInline();
4073 FD->setInnerLocStart(ReadSourceLocation());
4074 ReadFunctionDefinition(FD);
4075 assert(Record.getIdx() == Record.size() && "lazy body must be last");
4079 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4080 auto *RD = cast<CXXRecordDecl>(D);
4081 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4082 bool HadRealDefinition =
4083 OldDD && (OldDD->Definition != RD ||
4084 !Reader.PendingFakeDefinitionData.count(OldDD));
4085 ReadCXXRecordDefinition(RD, /*Update*/true);
4087 // Visible update is handled separately.
4088 uint64_t LexicalOffset = ReadLocalOffset();
4089 if (!HadRealDefinition && LexicalOffset) {
4090 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4091 Reader.PendingFakeDefinitionData.erase(OldDD);
4094 auto TSK = (TemplateSpecializationKind)Record.readInt();
4095 SourceLocation POI = ReadSourceLocation();
4096 if (MemberSpecializationInfo *MSInfo =
4097 RD->getMemberSpecializationInfo()) {
4098 MSInfo->setTemplateSpecializationKind(TSK);
4099 MSInfo->setPointOfInstantiation(POI);
4101 ClassTemplateSpecializationDecl *Spec =
4102 cast<ClassTemplateSpecializationDecl>(RD);
4103 Spec->setTemplateSpecializationKind(TSK);
4104 Spec->setPointOfInstantiation(POI);
4106 if (Record.readInt()) {
4108 ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4109 SmallVector<TemplateArgument, 8> TemplArgs;
4110 Record.readTemplateArgumentList(TemplArgs);
4111 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4112 Reader.getContext(), TemplArgs);
4114 // FIXME: If we already have a partial specialization set,
4115 // check that it matches.
4116 if (!Spec->getSpecializedTemplateOrPartial()
4117 .is<ClassTemplatePartialSpecializationDecl *>())
4118 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4122 RD->setTagKind((TagTypeKind)Record.readInt());
4123 RD->setLocation(ReadSourceLocation());
4124 RD->setLocStart(ReadSourceLocation());
4125 RD->setBraceRange(ReadSourceRange());
4127 if (Record.readInt()) {
4129 Record.readAttributes(Attrs);
4130 // If the declaration already has attributes, we assume that some other
4131 // AST file already loaded them.
4133 D->setAttrsImpl(Attrs, Reader.getContext());
4138 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4139 // Set the 'operator delete' directly to avoid emitting another update
4141 auto *Del = ReadDeclAs<FunctionDecl>();
4142 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4143 auto *ThisArg = Record.readExpr();
4144 // FIXME: Check consistency if we have an old and new operator delete.
4145 if (!First->OperatorDelete) {
4146 First->OperatorDelete = Del;
4147 First->OperatorDeleteThisArg = ThisArg;
4152 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4153 FunctionProtoType::ExceptionSpecInfo ESI;
4154 SmallVector<QualType, 8> ExceptionStorage;
4155 Record.readExceptionSpec(ExceptionStorage, ESI);
4157 // Update this declaration's exception specification, if needed.
4158 auto *FD = cast<FunctionDecl>(D);
4159 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4160 // FIXME: If the exception specification is already present, check that it
4162 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4163 FD->setType(Reader.getContext().getFunctionType(
4164 FPT->getReturnType(), FPT->getParamTypes(),
4165 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4167 // When we get to the end of deserializing, see if there are other decls
4168 // that we need to propagate this exception specification onto.
4169 Reader.PendingExceptionSpecUpdates.insert(
4170 std::make_pair(FD->getCanonicalDecl(), FD));
4175 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4176 // FIXME: Also do this when merging redecls.
4177 QualType DeducedResultType = Record.readType();
4178 for (auto *Redecl : merged_redecls(D)) {
4179 // FIXME: If the return type is already deduced, check that it matches.
4180 FunctionDecl *FD = cast<FunctionDecl>(Redecl);
4181 Reader.getContext().adjustDeducedFunctionResultType(FD,
4187 case UPD_DECL_MARKED_USED: {
4188 // Maintain AST consistency: any later redeclarations are used too.
4189 D->markUsed(Reader.getContext());
4193 case UPD_MANGLING_NUMBER:
4194 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4198 case UPD_STATIC_LOCAL_NUMBER:
4199 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4203 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4204 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4205 ReadSourceRange()));
4208 case UPD_DECL_EXPORTED: {
4209 unsigned SubmoduleID = readSubmoduleID();
4210 auto *Exported = cast<NamedDecl>(D);
4211 if (auto *TD = dyn_cast<TagDecl>(Exported))
4212 Exported = TD->getDefinition();
4213 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4214 if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
4215 Reader.getContext().mergeDefinitionIntoModule(cast<NamedDecl>(Exported),
4217 Reader.PendingMergedDefinitionsToDeduplicate.insert(
4218 cast<NamedDecl>(Exported));
4219 } else if (Owner && Owner->NameVisibility != Module::AllVisible) {
4220 // If Owner is made visible at some later point, make this declaration
4222 Reader.HiddenNamesMap[Owner].push_back(Exported);
4224 // The declaration is now visible.
4225 Exported->setVisibleDespiteOwningModule();
4230 case UPD_DECL_MARKED_OPENMP_DECLARETARGET:
4231 case UPD_ADDED_ATTR_TO_RECORD:
4233 Record.readAttributes(Attrs);
4234 assert(Attrs.size() == 1);
4235 D->addAttr(Attrs[0]);