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.BodySource[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 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
800 case FunctionDecl::TK_NonTemplate:
801 mergeRedeclarable(FD, Redecl);
803 case FunctionDecl::TK_FunctionTemplate:
804 // Merged when we merge the template.
805 FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
807 case FunctionDecl::TK_MemberSpecialization: {
808 FunctionDecl *InstFD = ReadDeclAs<FunctionDecl>();
809 TemplateSpecializationKind TSK =
810 (TemplateSpecializationKind)Record.readInt();
811 SourceLocation POI = ReadSourceLocation();
812 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
813 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
814 mergeRedeclarable(FD, Redecl);
817 case FunctionDecl::TK_FunctionTemplateSpecialization: {
818 FunctionTemplateDecl *Template = ReadDeclAs<FunctionTemplateDecl>();
819 TemplateSpecializationKind TSK =
820 (TemplateSpecializationKind)Record.readInt();
822 // Template arguments.
823 SmallVector<TemplateArgument, 8> TemplArgs;
824 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
826 // Template args as written.
827 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
828 SourceLocation LAngleLoc, RAngleLoc;
829 bool HasTemplateArgumentsAsWritten = Record.readInt();
830 if (HasTemplateArgumentsAsWritten) {
831 unsigned NumTemplateArgLocs = Record.readInt();
832 TemplArgLocs.reserve(NumTemplateArgLocs);
833 for (unsigned i=0; i != NumTemplateArgLocs; ++i)
834 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
836 LAngleLoc = ReadSourceLocation();
837 RAngleLoc = ReadSourceLocation();
840 SourceLocation POI = ReadSourceLocation();
842 ASTContext &C = Reader.getContext();
843 TemplateArgumentList *TemplArgList
844 = TemplateArgumentList::CreateCopy(C, TemplArgs);
845 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
846 for (unsigned i=0, e = TemplArgLocs.size(); i != e; ++i)
847 TemplArgsInfo.addArgument(TemplArgLocs[i]);
848 FunctionTemplateSpecializationInfo *FTInfo
849 = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
851 HasTemplateArgumentsAsWritten ? &TemplArgsInfo
854 FD->TemplateOrSpecialization = FTInfo;
856 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
857 // The template that contains the specializations set. It's not safe to
858 // use getCanonicalDecl on Template since it may still be initializing.
859 FunctionTemplateDecl *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
860 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
861 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
862 // FunctionTemplateSpecializationInfo's Profile().
863 // We avoid getASTContext because a decl in the parent hierarchy may
865 llvm::FoldingSetNodeID ID;
866 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
867 void *InsertPos = nullptr;
868 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
869 FunctionTemplateSpecializationInfo *ExistingInfo =
870 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
872 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
874 assert(Reader.getContext().getLangOpts().Modules &&
875 "already deserialized this template specialization");
876 mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
881 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
883 UnresolvedSet<8> TemplDecls;
884 unsigned NumTemplates = Record.readInt();
885 while (NumTemplates--)
886 TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
889 TemplateArgumentListInfo TemplArgs;
890 unsigned NumArgs = Record.readInt();
892 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
893 TemplArgs.setLAngleLoc(ReadSourceLocation());
894 TemplArgs.setRAngleLoc(ReadSourceLocation());
896 FD->setDependentTemplateSpecialization(Reader.getContext(),
897 TemplDecls, TemplArgs);
898 // These are not merged; we don't need to merge redeclarations of dependent
904 // Read in the parameters.
905 unsigned NumParams = Record.readInt();
906 SmallVector<ParmVarDecl *, 16> Params;
907 Params.reserve(NumParams);
908 for (unsigned I = 0; I != NumParams; ++I)
909 Params.push_back(ReadDeclAs<ParmVarDecl>());
910 FD->setParams(Reader.getContext(), Params);
913 void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
915 if (Record.readInt()) {
916 // Load the body on-demand. Most clients won't care, because method
917 // definitions rarely show up in headers.
918 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
919 HasPendingBody = true;
920 MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
921 MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
923 MD->setInstanceMethod(Record.readInt());
924 MD->setVariadic(Record.readInt());
925 MD->setPropertyAccessor(Record.readInt());
926 MD->setDefined(Record.readInt());
927 MD->IsOverriding = Record.readInt();
928 MD->HasSkippedBody = Record.readInt();
930 MD->IsRedeclaration = Record.readInt();
931 MD->HasRedeclaration = Record.readInt();
932 if (MD->HasRedeclaration)
933 Reader.getContext().setObjCMethodRedeclaration(MD,
934 ReadDeclAs<ObjCMethodDecl>());
936 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
937 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
938 MD->SetRelatedResultType(Record.readInt());
939 MD->setReturnType(Record.readType());
940 MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
941 MD->DeclEndLoc = ReadSourceLocation();
942 unsigned NumParams = Record.readInt();
943 SmallVector<ParmVarDecl *, 16> Params;
944 Params.reserve(NumParams);
945 for (unsigned I = 0; I != NumParams; ++I)
946 Params.push_back(ReadDeclAs<ParmVarDecl>());
948 MD->SelLocsKind = Record.readInt();
949 unsigned NumStoredSelLocs = Record.readInt();
950 SmallVector<SourceLocation, 16> SelLocs;
951 SelLocs.reserve(NumStoredSelLocs);
952 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
953 SelLocs.push_back(ReadSourceLocation());
955 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
958 void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
959 VisitTypedefNameDecl(D);
961 D->Variance = Record.readInt();
962 D->Index = Record.readInt();
963 D->VarianceLoc = ReadSourceLocation();
964 D->ColonLoc = ReadSourceLocation();
967 void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
969 CD->setAtStartLoc(ReadSourceLocation());
970 CD->setAtEndRange(ReadSourceRange());
973 ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
974 unsigned numParams = Record.readInt();
978 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
979 typeParams.reserve(numParams);
980 for (unsigned i = 0; i != numParams; ++i) {
981 auto typeParam = ReadDeclAs<ObjCTypeParamDecl>();
985 typeParams.push_back(typeParam);
988 SourceLocation lAngleLoc = ReadSourceLocation();
989 SourceLocation rAngleLoc = ReadSourceLocation();
991 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
992 typeParams, rAngleLoc);
995 void ASTDeclReader::ReadObjCDefinitionData(
996 struct ObjCInterfaceDecl::DefinitionData &Data) {
997 // Read the superclass.
998 Data.SuperClassTInfo = GetTypeSourceInfo();
1000 Data.EndLoc = ReadSourceLocation();
1001 Data.HasDesignatedInitializers = Record.readInt();
1003 // Read the directly referenced protocols and their SourceLocations.
1004 unsigned NumProtocols = Record.readInt();
1005 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1006 Protocols.reserve(NumProtocols);
1007 for (unsigned I = 0; I != NumProtocols; ++I)
1008 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1009 SmallVector<SourceLocation, 16> ProtoLocs;
1010 ProtoLocs.reserve(NumProtocols);
1011 for (unsigned I = 0; I != NumProtocols; ++I)
1012 ProtoLocs.push_back(ReadSourceLocation());
1013 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1014 Reader.getContext());
1016 // Read the transitive closure of protocols referenced by this class.
1017 NumProtocols = Record.readInt();
1019 Protocols.reserve(NumProtocols);
1020 for (unsigned I = 0; I != NumProtocols; ++I)
1021 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1022 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1023 Reader.getContext());
1026 void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1027 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1028 // FIXME: odr checking?
1031 void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1032 RedeclarableResult Redecl = VisitRedeclarable(ID);
1033 VisitObjCContainerDecl(ID);
1034 TypeIDForTypeDecl = Record.getGlobalTypeID(Record.readInt());
1035 mergeRedeclarable(ID, Redecl);
1037 ID->TypeParamList = ReadObjCTypeParamList();
1038 if (Record.readInt()) {
1039 // Read the definition.
1040 ID->allocateDefinitionData();
1042 ReadObjCDefinitionData(ID->data());
1043 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1044 if (Canon->Data.getPointer()) {
1045 // If we already have a definition, keep the definition invariant and
1047 MergeDefinitionData(Canon, std::move(ID->data()));
1048 ID->Data = Canon->Data;
1050 // Set the definition data of the canonical declaration, so other
1051 // redeclarations will see it.
1052 ID->getCanonicalDecl()->Data = ID->Data;
1054 // We will rebuild this list lazily.
1055 ID->setIvarList(nullptr);
1058 // Note that we have deserialized a definition.
1059 Reader.PendingDefinitions.insert(ID);
1061 // Note that we've loaded this Objective-C class.
1062 Reader.ObjCClassesLoaded.push_back(ID);
1064 ID->Data = ID->getCanonicalDecl()->Data;
1068 void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1069 VisitFieldDecl(IVD);
1070 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1071 // This field will be built lazily.
1072 IVD->setNextIvar(nullptr);
1073 bool synth = Record.readInt();
1074 IVD->setSynthesize(synth);
1077 void ASTDeclReader::ReadObjCDefinitionData(
1078 struct ObjCProtocolDecl::DefinitionData &Data) {
1080 unsigned NumProtoRefs = Record.readInt();
1081 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1082 ProtoRefs.reserve(NumProtoRefs);
1083 for (unsigned I = 0; I != NumProtoRefs; ++I)
1084 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1085 SmallVector<SourceLocation, 16> ProtoLocs;
1086 ProtoLocs.reserve(NumProtoRefs);
1087 for (unsigned I = 0; I != NumProtoRefs; ++I)
1088 ProtoLocs.push_back(ReadSourceLocation());
1089 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1090 ProtoLocs.data(), Reader.getContext());
1093 void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1094 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1095 // FIXME: odr checking?
1098 void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1099 RedeclarableResult Redecl = VisitRedeclarable(PD);
1100 VisitObjCContainerDecl(PD);
1101 mergeRedeclarable(PD, Redecl);
1103 if (Record.readInt()) {
1104 // Read the definition.
1105 PD->allocateDefinitionData();
1107 ReadObjCDefinitionData(PD->data());
1109 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1110 if (Canon->Data.getPointer()) {
1111 // If we already have a definition, keep the definition invariant and
1113 MergeDefinitionData(Canon, std::move(PD->data()));
1114 PD->Data = Canon->Data;
1116 // Set the definition data of the canonical declaration, so other
1117 // redeclarations will see it.
1118 PD->getCanonicalDecl()->Data = PD->Data;
1120 // Note that we have deserialized a definition.
1121 Reader.PendingDefinitions.insert(PD);
1123 PD->Data = PD->getCanonicalDecl()->Data;
1127 void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1131 void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1132 VisitObjCContainerDecl(CD);
1133 CD->setCategoryNameLoc(ReadSourceLocation());
1134 CD->setIvarLBraceLoc(ReadSourceLocation());
1135 CD->setIvarRBraceLoc(ReadSourceLocation());
1137 // Note that this category has been deserialized. We do this before
1138 // deserializing the interface declaration, so that it will consider this
1140 Reader.CategoriesDeserialized.insert(CD);
1142 CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1143 CD->TypeParamList = ReadObjCTypeParamList();
1144 unsigned NumProtoRefs = Record.readInt();
1145 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1146 ProtoRefs.reserve(NumProtoRefs);
1147 for (unsigned I = 0; I != NumProtoRefs; ++I)
1148 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1149 SmallVector<SourceLocation, 16> ProtoLocs;
1150 ProtoLocs.reserve(NumProtoRefs);
1151 for (unsigned I = 0; I != NumProtoRefs; ++I)
1152 ProtoLocs.push_back(ReadSourceLocation());
1153 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1154 Reader.getContext());
1157 void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1158 VisitNamedDecl(CAD);
1159 CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1162 void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1164 D->setAtLoc(ReadSourceLocation());
1165 D->setLParenLoc(ReadSourceLocation());
1166 QualType T = Record.readType();
1167 TypeSourceInfo *TSI = GetTypeSourceInfo();
1169 D->setPropertyAttributes(
1170 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1171 D->setPropertyAttributesAsWritten(
1172 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1173 D->setPropertyImplementation(
1174 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1175 DeclarationName GetterName = Record.readDeclarationName();
1176 SourceLocation GetterLoc = ReadSourceLocation();
1177 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1178 DeclarationName SetterName = Record.readDeclarationName();
1179 SourceLocation SetterLoc = ReadSourceLocation();
1180 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1181 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1182 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1183 D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1186 void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1187 VisitObjCContainerDecl(D);
1188 D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1191 void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1192 VisitObjCImplDecl(D);
1193 D->CategoryNameLoc = ReadSourceLocation();
1196 void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1197 VisitObjCImplDecl(D);
1198 D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1199 D->SuperLoc = ReadSourceLocation();
1200 D->setIvarLBraceLoc(ReadSourceLocation());
1201 D->setIvarRBraceLoc(ReadSourceLocation());
1202 D->setHasNonZeroConstructors(Record.readInt());
1203 D->setHasDestructors(Record.readInt());
1204 D->NumIvarInitializers = Record.readInt();
1205 if (D->NumIvarInitializers)
1206 D->IvarInitializers = ReadGlobalOffset();
1209 void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1211 D->setAtLoc(ReadSourceLocation());
1212 D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1213 D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1214 D->IvarLoc = ReadSourceLocation();
1215 D->setGetterCXXConstructor(Record.readExpr());
1216 D->setSetterCXXAssignment(Record.readExpr());
1219 void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1220 VisitDeclaratorDecl(FD);
1221 FD->Mutable = Record.readInt();
1222 if (int BitWidthOrInitializer = Record.readInt()) {
1223 FD->InitStorage.setInt(
1224 static_cast<FieldDecl::InitStorageKind>(BitWidthOrInitializer - 1));
1225 if (FD->InitStorage.getInt() == FieldDecl::ISK_CapturedVLAType) {
1226 // Read captured variable length array.
1227 FD->InitStorage.setPointer(Record.readType().getAsOpaquePtr());
1229 FD->InitStorage.setPointer(Record.readExpr());
1232 if (!FD->getDeclName()) {
1233 if (FieldDecl *Tmpl = ReadDeclAs<FieldDecl>())
1234 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1239 void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1240 VisitDeclaratorDecl(PD);
1241 PD->GetterId = Record.getIdentifierInfo();
1242 PD->SetterId = Record.getIdentifierInfo();
1245 void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1248 FD->ChainingSize = Record.readInt();
1249 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1250 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1252 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1253 FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1258 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1259 RedeclarableResult Redecl = VisitRedeclarable(VD);
1260 VisitDeclaratorDecl(VD);
1262 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1263 VD->VarDeclBits.TSCSpec = Record.readInt();
1264 VD->VarDeclBits.InitStyle = Record.readInt();
1265 if (!isa<ParmVarDecl>(VD)) {
1266 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1268 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1269 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1270 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1271 VD->NonParmVarDeclBits.ARCPseudoStrong = Record.readInt();
1272 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1273 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1274 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1275 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1276 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1277 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1279 Linkage VarLinkage = Linkage(Record.readInt());
1280 VD->setCachedLinkage(VarLinkage);
1282 // Reconstruct the one piece of the IdentifierNamespace that we need.
1283 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1284 VD->getLexicalDeclContext()->isFunctionOrMethod())
1285 VD->setLocalExternDecl();
1287 if (uint64_t Val = Record.readInt()) {
1288 VD->setInit(Record.readExpr());
1289 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1290 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1291 Eval->CheckedICE = true;
1292 Eval->IsICE = Val == 3;
1297 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1299 switch ((VarKind)Record.readInt()) {
1300 case VarNotTemplate:
1301 // Only true variables (not parameters or implicit parameters) can be
1302 // merged; the other kinds are not really redeclarable at all.
1303 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1304 !isa<VarTemplateSpecializationDecl>(VD))
1305 mergeRedeclarable(VD, Redecl);
1308 // Merged when we merge the template.
1309 VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1311 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1312 VarDecl *Tmpl = ReadDeclAs<VarDecl>();
1313 TemplateSpecializationKind TSK =
1314 (TemplateSpecializationKind)Record.readInt();
1315 SourceLocation POI = ReadSourceLocation();
1316 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1317 mergeRedeclarable(VD, Redecl);
1325 void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1329 void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1331 unsigned isObjCMethodParam = Record.readInt();
1332 unsigned scopeDepth = Record.readInt();
1333 unsigned scopeIndex = Record.readInt();
1334 unsigned declQualifier = Record.readInt();
1335 if (isObjCMethodParam) {
1336 assert(scopeDepth == 0);
1337 PD->setObjCMethodScopeInfo(scopeIndex);
1338 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1340 PD->setScopeInfo(scopeDepth, scopeIndex);
1342 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1343 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1344 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1345 PD->setUninstantiatedDefaultArg(Record.readExpr());
1347 // FIXME: If this is a redeclaration of a function from another module, handle
1348 // inheritance of default arguments.
1351 void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1353 BindingDecl **BDs = DD->getTrailingObjects<BindingDecl*>();
1354 for (unsigned I = 0; I != DD->NumBindings; ++I)
1355 BDs[I] = ReadDeclAs<BindingDecl>();
1358 void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1360 BD->Binding = Record.readExpr();
1363 void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1365 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1366 AD->setRParenLoc(ReadSourceLocation());
1369 void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1371 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1372 BD->setSignatureAsWritten(GetTypeSourceInfo());
1373 unsigned NumParams = Record.readInt();
1374 SmallVector<ParmVarDecl *, 16> Params;
1375 Params.reserve(NumParams);
1376 for (unsigned I = 0; I != NumParams; ++I)
1377 Params.push_back(ReadDeclAs<ParmVarDecl>());
1378 BD->setParams(Params);
1380 BD->setIsVariadic(Record.readInt());
1381 BD->setBlockMissingReturnType(Record.readInt());
1382 BD->setIsConversionFromLambda(Record.readInt());
1384 bool capturesCXXThis = Record.readInt();
1385 unsigned numCaptures = Record.readInt();
1386 SmallVector<BlockDecl::Capture, 16> captures;
1387 captures.reserve(numCaptures);
1388 for (unsigned i = 0; i != numCaptures; ++i) {
1389 VarDecl *decl = ReadDeclAs<VarDecl>();
1390 unsigned flags = Record.readInt();
1391 bool byRef = (flags & 1);
1392 bool nested = (flags & 2);
1393 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1395 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1397 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1400 void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1402 unsigned ContextParamPos = Record.readInt();
1403 CD->setNothrow(Record.readInt() != 0);
1404 // Body is set by VisitCapturedStmt.
1405 for (unsigned I = 0; I < CD->NumParams; ++I) {
1406 if (I != ContextParamPos)
1407 CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1409 CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1413 void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1415 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1416 D->setExternLoc(ReadSourceLocation());
1417 D->setRBraceLoc(ReadSourceLocation());
1420 void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1422 D->RBraceLoc = ReadSourceLocation();
1425 void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1427 D->setLocStart(ReadSourceLocation());
1430 void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1431 RedeclarableResult Redecl = VisitRedeclarable(D);
1433 D->setInline(Record.readInt());
1434 D->LocStart = ReadSourceLocation();
1435 D->RBraceLoc = ReadSourceLocation();
1437 // Defer loading the anonymous namespace until we've finished merging
1438 // this namespace; loading it might load a later declaration of the
1439 // same namespace, and we have an invariant that older declarations
1440 // get merged before newer ones try to merge.
1441 GlobalDeclID AnonNamespace = 0;
1442 if (Redecl.getFirstID() == ThisDeclID) {
1443 AnonNamespace = ReadDeclID();
1445 // Link this namespace back to the first declaration, which has already
1446 // been deserialized.
1447 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1450 mergeRedeclarable(D, Redecl);
1452 if (AnonNamespace) {
1453 // Each module has its own anonymous namespace, which is disjoint from
1454 // any other module's anonymous namespaces, so don't attach the anonymous
1455 // namespace at all.
1456 NamespaceDecl *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1457 if (!Record.isModule())
1458 D->setAnonymousNamespace(Anon);
1462 void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1463 RedeclarableResult Redecl = VisitRedeclarable(D);
1465 D->NamespaceLoc = ReadSourceLocation();
1466 D->IdentLoc = ReadSourceLocation();
1467 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1468 D->Namespace = ReadDeclAs<NamedDecl>();
1469 mergeRedeclarable(D, Redecl);
1472 void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1474 D->setUsingLoc(ReadSourceLocation());
1475 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1476 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1477 D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1478 D->setTypename(Record.readInt());
1479 if (NamedDecl *Pattern = ReadDeclAs<NamedDecl>())
1480 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1484 void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1486 D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1487 NamedDecl **Expansions = D->getTrailingObjects<NamedDecl*>();
1488 for (unsigned I = 0; I != D->NumExpansions; ++I)
1489 Expansions[I] = ReadDeclAs<NamedDecl>();
1493 void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1494 RedeclarableResult Redecl = VisitRedeclarable(D);
1496 D->setTargetDecl(ReadDeclAs<NamedDecl>());
1497 D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1498 UsingShadowDecl *Pattern = ReadDeclAs<UsingShadowDecl>();
1500 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1501 mergeRedeclarable(D, Redecl);
1504 void ASTDeclReader::VisitConstructorUsingShadowDecl(
1505 ConstructorUsingShadowDecl *D) {
1506 VisitUsingShadowDecl(D);
1507 D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1508 D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1509 D->IsVirtual = Record.readInt();
1512 void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1514 D->UsingLoc = ReadSourceLocation();
1515 D->NamespaceLoc = ReadSourceLocation();
1516 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1517 D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1518 D->CommonAncestor = ReadDeclAs<DeclContext>();
1521 void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1523 D->setUsingLoc(ReadSourceLocation());
1524 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1525 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1526 D->EllipsisLoc = ReadSourceLocation();
1530 void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1531 UnresolvedUsingTypenameDecl *D) {
1533 D->TypenameLocation = ReadSourceLocation();
1534 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1535 D->EllipsisLoc = ReadSourceLocation();
1539 void ASTDeclReader::ReadCXXDefinitionData(
1540 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1541 // Note: the caller has deserialized the IsLambda bit already.
1542 Data.UserDeclaredConstructor = Record.readInt();
1543 Data.UserDeclaredSpecialMembers = Record.readInt();
1544 Data.Aggregate = Record.readInt();
1545 Data.PlainOldData = Record.readInt();
1546 Data.Empty = Record.readInt();
1547 Data.Polymorphic = Record.readInt();
1548 Data.Abstract = Record.readInt();
1549 Data.IsStandardLayout = Record.readInt();
1550 Data.HasNoNonEmptyBases = Record.readInt();
1551 Data.HasPrivateFields = Record.readInt();
1552 Data.HasProtectedFields = Record.readInt();
1553 Data.HasPublicFields = Record.readInt();
1554 Data.HasMutableFields = Record.readInt();
1555 Data.HasVariantMembers = Record.readInt();
1556 Data.HasOnlyCMembers = Record.readInt();
1557 Data.HasInClassInitializer = Record.readInt();
1558 Data.HasUninitializedReferenceMember = Record.readInt();
1559 Data.HasUninitializedFields = Record.readInt();
1560 Data.HasInheritedConstructor = Record.readInt();
1561 Data.HasInheritedAssignment = Record.readInt();
1562 Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1563 Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1564 Data.NeedOverloadResolutionForDestructor = Record.readInt();
1565 Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1566 Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1567 Data.DefaultedDestructorIsDeleted = Record.readInt();
1568 Data.HasTrivialSpecialMembers = Record.readInt();
1569 Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1570 Data.HasIrrelevantDestructor = Record.readInt();
1571 Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1572 Data.HasDefaultedDefaultConstructor = Record.readInt();
1573 Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1574 Data.HasConstexprDefaultConstructor = Record.readInt();
1575 Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1576 Data.ComputedVisibleConversions = Record.readInt();
1577 Data.UserProvidedDefaultConstructor = Record.readInt();
1578 Data.DeclaredSpecialMembers = Record.readInt();
1579 Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1580 Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1581 Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1582 Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1583 Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1584 Data.ODRHash = Record.readInt();
1585 Data.HasODRHash = true;
1587 if (Record.readInt()) {
1588 Reader.BodySource[D] = Loc.F->Kind == ModuleKind::MK_MainFile
1589 ? ExternalASTSource::EK_Never
1590 : ExternalASTSource::EK_Always;
1593 Data.NumBases = Record.readInt();
1595 Data.Bases = ReadGlobalOffset();
1596 Data.NumVBases = Record.readInt();
1598 Data.VBases = ReadGlobalOffset();
1600 Record.readUnresolvedSet(Data.Conversions);
1601 Record.readUnresolvedSet(Data.VisibleConversions);
1602 assert(Data.Definition && "Data.Definition should be already set!");
1603 Data.FirstFriend = ReadDeclID();
1605 if (Data.IsLambda) {
1606 typedef LambdaCapture Capture;
1607 CXXRecordDecl::LambdaDefinitionData &Lambda
1608 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1609 Lambda.Dependent = Record.readInt();
1610 Lambda.IsGenericLambda = Record.readInt();
1611 Lambda.CaptureDefault = Record.readInt();
1612 Lambda.NumCaptures = Record.readInt();
1613 Lambda.NumExplicitCaptures = Record.readInt();
1614 Lambda.ManglingNumber = Record.readInt();
1615 Lambda.ContextDecl = ReadDeclID();
1616 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1617 sizeof(Capture) * Lambda.NumCaptures);
1618 Capture *ToCapture = Lambda.Captures;
1619 Lambda.MethodTyInfo = GetTypeSourceInfo();
1620 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1621 SourceLocation Loc = ReadSourceLocation();
1622 bool IsImplicit = Record.readInt();
1623 LambdaCaptureKind Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1628 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1632 VarDecl *Var = ReadDeclAs<VarDecl>();
1633 SourceLocation EllipsisLoc = ReadSourceLocation();
1634 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1641 void ASTDeclReader::MergeDefinitionData(
1642 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1643 assert(D->DefinitionData &&
1644 "merging class definition into non-definition");
1645 auto &DD = *D->DefinitionData;
1647 if (DD.Definition != MergeDD.Definition) {
1648 // Track that we merged the definitions.
1649 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1651 Reader.PendingDefinitions.erase(MergeDD.Definition);
1652 MergeDD.Definition->IsCompleteDefinition = false;
1653 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1654 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1655 "already loaded pending lookups for merged definition");
1658 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1659 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1660 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1661 // We faked up this definition data because we found a class for which we'd
1662 // not yet loaded the definition. Replace it with the real thing now.
1663 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1664 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1666 // Don't change which declaration is the definition; that is required
1667 // to be invariant once we select it.
1668 auto *Def = DD.Definition;
1669 DD = std::move(MergeDD);
1670 DD.Definition = Def;
1674 // FIXME: Move this out into a .def file?
1675 bool DetectedOdrViolation = false;
1676 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1677 #define MATCH_FIELD(Field) \
1678 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1680 MATCH_FIELD(UserDeclaredConstructor)
1681 MATCH_FIELD(UserDeclaredSpecialMembers)
1682 MATCH_FIELD(Aggregate)
1683 MATCH_FIELD(PlainOldData)
1685 MATCH_FIELD(Polymorphic)
1686 MATCH_FIELD(Abstract)
1687 MATCH_FIELD(IsStandardLayout)
1688 MATCH_FIELD(HasNoNonEmptyBases)
1689 MATCH_FIELD(HasPrivateFields)
1690 MATCH_FIELD(HasProtectedFields)
1691 MATCH_FIELD(HasPublicFields)
1692 MATCH_FIELD(HasMutableFields)
1693 MATCH_FIELD(HasVariantMembers)
1694 MATCH_FIELD(HasOnlyCMembers)
1695 MATCH_FIELD(HasInClassInitializer)
1696 MATCH_FIELD(HasUninitializedReferenceMember)
1697 MATCH_FIELD(HasUninitializedFields)
1698 MATCH_FIELD(HasInheritedConstructor)
1699 MATCH_FIELD(HasInheritedAssignment)
1700 MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1701 MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1702 MATCH_FIELD(NeedOverloadResolutionForDestructor)
1703 MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1704 MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1705 MATCH_FIELD(DefaultedDestructorIsDeleted)
1706 OR_FIELD(HasTrivialSpecialMembers)
1707 OR_FIELD(DeclaredNonTrivialSpecialMembers)
1708 MATCH_FIELD(HasIrrelevantDestructor)
1709 OR_FIELD(HasConstexprNonCopyMoveConstructor)
1710 OR_FIELD(HasDefaultedDefaultConstructor)
1711 MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1712 OR_FIELD(HasConstexprDefaultConstructor)
1713 MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1714 // ComputedVisibleConversions is handled below.
1715 MATCH_FIELD(UserProvidedDefaultConstructor)
1716 OR_FIELD(DeclaredSpecialMembers)
1717 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1718 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1719 MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1720 OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1721 OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1722 MATCH_FIELD(IsLambda)
1726 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1727 DetectedOdrViolation = true;
1728 // FIXME: Issue a diagnostic if the base classes don't match when we come
1729 // to lazily load them.
1731 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1732 // match when we come to lazily load them.
1733 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1734 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1735 DD.ComputedVisibleConversions = true;
1738 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1742 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1743 // when they occur within the body of a function template specialization).
1746 if (D->getODRHash() != MergeDD.ODRHash) {
1747 DetectedOdrViolation = true;
1750 if (DetectedOdrViolation)
1751 Reader.PendingOdrMergeFailures[DD.Definition].push_back(MergeDD.Definition);
1754 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1755 struct CXXRecordDecl::DefinitionData *DD;
1756 ASTContext &C = Reader.getContext();
1758 // Determine whether this is a lambda closure type, so that we can
1759 // allocate the appropriate DefinitionData structure.
1760 bool IsLambda = Record.readInt();
1762 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1765 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1767 ReadCXXDefinitionData(*DD, D);
1769 // We might already have a definition for this record. This can happen either
1770 // because we're reading an update record, or because we've already done some
1771 // merging. Either way, just merge into it.
1772 CXXRecordDecl *Canon = D->getCanonicalDecl();
1773 if (Canon->DefinitionData) {
1774 MergeDefinitionData(Canon, std::move(*DD));
1775 D->DefinitionData = Canon->DefinitionData;
1779 // Mark this declaration as being a definition.
1780 D->IsCompleteDefinition = true;
1781 D->DefinitionData = DD;
1783 // If this is not the first declaration or is an update record, we can have
1784 // other redeclarations already. Make a note that we need to propagate the
1785 // DefinitionData pointer onto them.
1786 if (Update || Canon != D) {
1787 Canon->DefinitionData = D->DefinitionData;
1788 Reader.PendingDefinitions.insert(D);
1792 ASTDeclReader::RedeclarableResult
1793 ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1794 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1796 ASTContext &C = Reader.getContext();
1799 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1801 switch ((CXXRecKind)Record.readInt()) {
1802 case CXXRecNotTemplate:
1803 // Merged when we merge the folding set entry in the primary template.
1804 if (!isa<ClassTemplateSpecializationDecl>(D))
1805 mergeRedeclarable(D, Redecl);
1807 case CXXRecTemplate: {
1808 // Merged when we merge the template.
1809 ClassTemplateDecl *Template = ReadDeclAs<ClassTemplateDecl>();
1810 D->TemplateOrInstantiation = Template;
1811 if (!Template->getTemplatedDecl()) {
1812 // We've not actually loaded the ClassTemplateDecl yet, because we're
1813 // currently being loaded as its pattern. Rely on it to set up our
1814 // TypeForDecl (see VisitClassTemplateDecl).
1816 // Beware: we do not yet know our canonical declaration, and may still
1817 // get merged once the surrounding class template has got off the ground.
1818 TypeIDForTypeDecl = 0;
1822 case CXXRecMemberSpecialization: {
1823 CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>();
1824 TemplateSpecializationKind TSK =
1825 (TemplateSpecializationKind)Record.readInt();
1826 SourceLocation POI = ReadSourceLocation();
1827 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1828 MSI->setPointOfInstantiation(POI);
1829 D->TemplateOrInstantiation = MSI;
1830 mergeRedeclarable(D, Redecl);
1835 bool WasDefinition = Record.readInt();
1837 ReadCXXRecordDefinition(D, /*Update*/false);
1839 // Propagate DefinitionData pointer from the canonical declaration.
1840 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1842 // Lazily load the key function to avoid deserializing every method so we can
1844 if (WasDefinition) {
1845 DeclID KeyFn = ReadDeclID();
1846 if (KeyFn && D->IsCompleteDefinition)
1847 // FIXME: This is wrong for the ARM ABI, where some other module may have
1848 // made this function no longer be a key function. We need an update
1849 // record or similar for that case.
1850 C.KeyFunctions[D] = KeyFn;
1856 void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1857 VisitFunctionDecl(D);
1860 void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1861 VisitFunctionDecl(D);
1863 unsigned NumOverridenMethods = Record.readInt();
1864 if (D->isCanonicalDecl()) {
1865 while (NumOverridenMethods--) {
1866 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1867 // MD may be initializing.
1868 if (CXXMethodDecl *MD = ReadDeclAs<CXXMethodDecl>())
1869 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1872 // We don't care about which declarations this used to override; we get
1873 // the relevant information from the canonical declaration.
1874 Record.skipInts(NumOverridenMethods);
1878 void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1879 // We need the inherited constructor information to merge the declaration,
1880 // so we have to read it before we call VisitCXXMethodDecl.
1881 if (D->isInheritingConstructor()) {
1882 auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1883 auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1884 *D->getTrailingObjects<InheritedConstructor>() =
1885 InheritedConstructor(Shadow, Ctor);
1888 VisitCXXMethodDecl(D);
1891 void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1892 VisitCXXMethodDecl(D);
1894 if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
1895 auto *Canon = cast<CXXDestructorDecl>(D->getCanonicalDecl());
1896 // FIXME: Check consistency if we have an old and new operator delete.
1897 if (!Canon->OperatorDelete)
1898 Canon->OperatorDelete = OperatorDelete;
1902 void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1903 VisitCXXMethodDecl(D);
1906 void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1908 D->ImportedAndComplete.setPointer(readModule());
1909 D->ImportedAndComplete.setInt(Record.readInt());
1910 SourceLocation *StoredLocs = D->getTrailingObjects<SourceLocation>();
1911 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1912 StoredLocs[I] = ReadSourceLocation();
1913 Record.skipInts(1); // The number of stored source locations.
1916 void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1918 D->setColonLoc(ReadSourceLocation());
1921 void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1923 if (Record.readInt()) // hasFriendDecl
1924 D->Friend = ReadDeclAs<NamedDecl>();
1926 D->Friend = GetTypeSourceInfo();
1927 for (unsigned i = 0; i != D->NumTPLists; ++i)
1928 D->getTrailingObjects<TemplateParameterList *>()[i] =
1929 Record.readTemplateParameterList();
1930 D->NextFriend = ReadDeclID();
1931 D->UnsupportedFriend = (Record.readInt() != 0);
1932 D->FriendLoc = ReadSourceLocation();
1935 void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1937 unsigned NumParams = Record.readInt();
1938 D->NumParams = NumParams;
1939 D->Params = new TemplateParameterList*[NumParams];
1940 for (unsigned i = 0; i != NumParams; ++i)
1941 D->Params[i] = Record.readTemplateParameterList();
1942 if (Record.readInt()) // HasFriendDecl
1943 D->Friend = ReadDeclAs<NamedDecl>();
1945 D->Friend = GetTypeSourceInfo();
1946 D->FriendLoc = ReadSourceLocation();
1949 DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
1952 DeclID PatternID = ReadDeclID();
1953 NamedDecl *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
1954 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
1955 // FIXME handle associated constraints
1956 D->init(TemplatedDecl, TemplateParams);
1961 ASTDeclReader::RedeclarableResult
1962 ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1963 RedeclarableResult Redecl = VisitRedeclarable(D);
1965 // Make sure we've allocated the Common pointer first. We do this before
1966 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
1967 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
1968 if (!CanonD->Common) {
1969 CanonD->Common = CanonD->newCommon(Reader.getContext());
1970 Reader.PendingDefinitions.insert(CanonD);
1972 D->Common = CanonD->Common;
1974 // If this is the first declaration of the template, fill in the information
1975 // for the 'common' pointer.
1976 if (ThisDeclID == Redecl.getFirstID()) {
1977 if (RedeclarableTemplateDecl *RTD
1978 = ReadDeclAs<RedeclarableTemplateDecl>()) {
1979 assert(RTD->getKind() == D->getKind() &&
1980 "InstantiatedFromMemberTemplate kind mismatch");
1981 D->setInstantiatedFromMemberTemplate(RTD);
1982 if (Record.readInt())
1983 D->setMemberSpecialization();
1987 DeclID PatternID = VisitTemplateDecl(D);
1988 D->IdentifierNamespace = Record.readInt();
1990 mergeRedeclarable(D, Redecl, PatternID);
1992 // If we merged the template with a prior declaration chain, merge the common
1994 // FIXME: Actually merge here, don't just overwrite.
1995 D->Common = D->getCanonicalDecl()->Common;
2000 void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2001 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2003 if (ThisDeclID == Redecl.getFirstID()) {
2004 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2005 // the specializations.
2006 SmallVector<serialization::DeclID, 32> SpecIDs;
2007 ReadDeclIDList(SpecIDs);
2008 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2011 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2012 // We were loaded before our templated declaration was. We've not set up
2013 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2015 Reader.getContext().getInjectedClassNameType(
2016 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2020 void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2021 llvm_unreachable("BuiltinTemplates are not serialized");
2024 /// TODO: Unify with ClassTemplateDecl version?
2025 /// May require unifying ClassTemplateDecl and
2026 /// VarTemplateDecl beyond TemplateDecl...
2027 void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2028 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2030 if (ThisDeclID == Redecl.getFirstID()) {
2031 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2032 // the specializations.
2033 SmallVector<serialization::DeclID, 32> SpecIDs;
2034 ReadDeclIDList(SpecIDs);
2035 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2039 ASTDeclReader::RedeclarableResult
2040 ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2041 ClassTemplateSpecializationDecl *D) {
2042 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2044 ASTContext &C = Reader.getContext();
2045 if (Decl *InstD = ReadDecl()) {
2046 if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2047 D->SpecializedTemplate = CTD;
2049 SmallVector<TemplateArgument, 8> TemplArgs;
2050 Record.readTemplateArgumentList(TemplArgs);
2051 TemplateArgumentList *ArgList
2052 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2053 ClassTemplateSpecializationDecl::SpecializedPartialSpecialization *PS
2054 = new (C) ClassTemplateSpecializationDecl::
2055 SpecializedPartialSpecialization();
2056 PS->PartialSpecialization
2057 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2058 PS->TemplateArgs = ArgList;
2059 D->SpecializedTemplate = PS;
2063 SmallVector<TemplateArgument, 8> TemplArgs;
2064 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2065 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2066 D->PointOfInstantiation = ReadSourceLocation();
2067 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2069 bool writtenAsCanonicalDecl = Record.readInt();
2070 if (writtenAsCanonicalDecl) {
2071 ClassTemplateDecl *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2072 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2073 // Set this as, or find, the canonical declaration for this specialization
2074 ClassTemplateSpecializationDecl *CanonSpec;
2075 if (ClassTemplatePartialSpecializationDecl *Partial =
2076 dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2077 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2078 .GetOrInsertNode(Partial);
2081 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2083 // If there was already a canonical specialization, merge into it.
2084 if (CanonSpec != D) {
2085 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2087 // This declaration might be a definition. Merge with any existing
2089 if (auto *DDD = D->DefinitionData) {
2090 if (CanonSpec->DefinitionData)
2091 MergeDefinitionData(CanonSpec, std::move(*DDD));
2093 CanonSpec->DefinitionData = D->DefinitionData;
2095 D->DefinitionData = CanonSpec->DefinitionData;
2101 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2102 ClassTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo
2103 = new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2104 ExplicitInfo->TypeAsWritten = TyInfo;
2105 ExplicitInfo->ExternLoc = ReadSourceLocation();
2106 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2107 D->ExplicitInfo = ExplicitInfo;
2113 void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2114 ClassTemplatePartialSpecializationDecl *D) {
2115 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2117 D->TemplateParams = Record.readTemplateParameterList();
2118 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2120 // These are read/set from/to the first declaration.
2121 if (ThisDeclID == Redecl.getFirstID()) {
2122 D->InstantiatedFromMember.setPointer(
2123 ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2124 D->InstantiatedFromMember.setInt(Record.readInt());
2128 void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2129 ClassScopeFunctionSpecializationDecl *D) {
2131 D->Specialization = ReadDeclAs<CXXMethodDecl>();
2134 void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2135 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2137 if (ThisDeclID == Redecl.getFirstID()) {
2138 // This FunctionTemplateDecl owns a CommonPtr; read it.
2139 SmallVector<serialization::DeclID, 32> SpecIDs;
2140 ReadDeclIDList(SpecIDs);
2141 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2145 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2146 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2147 /// VarTemplate(Partial)SpecializationDecl with a new data
2148 /// structure Template(Partial)SpecializationDecl, and
2149 /// using Template(Partial)SpecializationDecl as input type.
2150 ASTDeclReader::RedeclarableResult
2151 ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2152 VarTemplateSpecializationDecl *D) {
2153 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2155 ASTContext &C = Reader.getContext();
2156 if (Decl *InstD = ReadDecl()) {
2157 if (VarTemplateDecl *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2158 D->SpecializedTemplate = VTD;
2160 SmallVector<TemplateArgument, 8> TemplArgs;
2161 Record.readTemplateArgumentList(TemplArgs);
2162 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2164 VarTemplateSpecializationDecl::SpecializedPartialSpecialization *PS =
2166 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2167 PS->PartialSpecialization =
2168 cast<VarTemplatePartialSpecializationDecl>(InstD);
2169 PS->TemplateArgs = ArgList;
2170 D->SpecializedTemplate = PS;
2175 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2176 VarTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo =
2177 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2178 ExplicitInfo->TypeAsWritten = TyInfo;
2179 ExplicitInfo->ExternLoc = ReadSourceLocation();
2180 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2181 D->ExplicitInfo = ExplicitInfo;
2184 SmallVector<TemplateArgument, 8> TemplArgs;
2185 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2186 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2187 D->PointOfInstantiation = ReadSourceLocation();
2188 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2190 bool writtenAsCanonicalDecl = Record.readInt();
2191 if (writtenAsCanonicalDecl) {
2192 VarTemplateDecl *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2193 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2194 // FIXME: If it's already present, merge it.
2195 if (VarTemplatePartialSpecializationDecl *Partial =
2196 dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2197 CanonPattern->getCommonPtr()->PartialSpecializations
2198 .GetOrInsertNode(Partial);
2200 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2208 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2209 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2210 /// VarTemplate(Partial)SpecializationDecl with a new data
2211 /// structure Template(Partial)SpecializationDecl, and
2212 /// using Template(Partial)SpecializationDecl as input type.
2213 void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2214 VarTemplatePartialSpecializationDecl *D) {
2215 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2217 D->TemplateParams = Record.readTemplateParameterList();
2218 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2220 // These are read/set from/to the first declaration.
2221 if (ThisDeclID == Redecl.getFirstID()) {
2222 D->InstantiatedFromMember.setPointer(
2223 ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2224 D->InstantiatedFromMember.setInt(Record.readInt());
2228 void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2231 D->setDeclaredWithTypename(Record.readInt());
2233 if (Record.readInt())
2234 D->setDefaultArgument(GetTypeSourceInfo());
2237 void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2238 VisitDeclaratorDecl(D);
2239 // TemplateParmPosition.
2240 D->setDepth(Record.readInt());
2241 D->setPosition(Record.readInt());
2242 if (D->isExpandedParameterPack()) {
2243 auto TypesAndInfos =
2244 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2245 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2246 new (&TypesAndInfos[I].first) QualType(Record.readType());
2247 TypesAndInfos[I].second = GetTypeSourceInfo();
2250 // Rest of NonTypeTemplateParmDecl.
2251 D->ParameterPack = Record.readInt();
2252 if (Record.readInt())
2253 D->setDefaultArgument(Record.readExpr());
2257 void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2258 VisitTemplateDecl(D);
2259 // TemplateParmPosition.
2260 D->setDepth(Record.readInt());
2261 D->setPosition(Record.readInt());
2262 if (D->isExpandedParameterPack()) {
2263 TemplateParameterList **Data =
2264 D->getTrailingObjects<TemplateParameterList *>();
2265 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2267 Data[I] = Record.readTemplateParameterList();
2269 // Rest of TemplateTemplateParmDecl.
2270 D->ParameterPack = Record.readInt();
2271 if (Record.readInt())
2272 D->setDefaultArgument(Reader.getContext(),
2273 Record.readTemplateArgumentLoc());
2277 void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2278 VisitRedeclarableTemplateDecl(D);
2281 void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2283 D->AssertExprAndFailed.setPointer(Record.readExpr());
2284 D->AssertExprAndFailed.setInt(Record.readInt());
2285 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2286 D->RParenLoc = ReadSourceLocation();
2289 void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2293 std::pair<uint64_t, uint64_t>
2294 ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2295 uint64_t LexicalOffset = ReadLocalOffset();
2296 uint64_t VisibleOffset = ReadLocalOffset();
2297 return std::make_pair(LexicalOffset, VisibleOffset);
2300 template <typename T>
2301 ASTDeclReader::RedeclarableResult
2302 ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2303 DeclID FirstDeclID = ReadDeclID();
2304 Decl *MergeWith = nullptr;
2306 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2307 bool IsFirstLocalDecl = false;
2309 uint64_t RedeclOffset = 0;
2311 // 0 indicates that this declaration was the only declaration of its entity,
2312 // and is used for space optimization.
2313 if (FirstDeclID == 0) {
2314 FirstDeclID = ThisDeclID;
2316 IsFirstLocalDecl = true;
2317 } else if (unsigned N = Record.readInt()) {
2318 // This declaration was the first local declaration, but may have imported
2319 // other declarations.
2321 IsFirstLocalDecl = true;
2323 // We have some declarations that must be before us in our redeclaration
2324 // chain. Read them now, and remember that we ought to merge with one of
2326 // FIXME: Provide a known merge target to the second and subsequent such
2328 for (unsigned I = 0; I != N - 1; ++I)
2329 MergeWith = ReadDecl();
2331 RedeclOffset = ReadLocalOffset();
2333 // This declaration was not the first local declaration. Read the first
2334 // local declaration now, to trigger the import of other redeclarations.
2338 T *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2339 if (FirstDecl != D) {
2340 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2341 // We temporarily set the first (canonical) declaration as the previous one
2342 // which is the one that matters and mark the real previous DeclID to be
2343 // loaded & attached later on.
2344 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2345 D->First = FirstDecl->getCanonicalDecl();
2348 T *DAsT = static_cast<T*>(D);
2350 // Note that we need to load local redeclarations of this decl and build a
2351 // decl chain for them. This must happen *after* we perform the preloading
2352 // above; this ensures that the redeclaration chain is built in the correct
2354 if (IsFirstLocalDecl)
2355 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2357 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2360 /// \brief Attempts to merge the given declaration (D) with another declaration
2361 /// of the same entity.
2362 template<typename T>
2363 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2364 RedeclarableResult &Redecl,
2365 DeclID TemplatePatternID) {
2366 // If modules are not available, there is no reason to perform this merge.
2367 if (!Reader.getContext().getLangOpts().Modules)
2370 // If we're not the canonical declaration, we don't need to merge.
2371 if (!DBase->isFirstDecl())
2374 T *D = static_cast<T*>(DBase);
2376 if (auto *Existing = Redecl.getKnownMergeTarget())
2377 // We already know of an existing declaration we should merge with.
2378 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2379 else if (FindExistingResult ExistingRes = findExisting(D))
2380 if (T *Existing = ExistingRes)
2381 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2384 /// \brief "Cast" to type T, asserting if we don't have an implicit conversion.
2385 /// We use this to put code in a template that will only be valid for certain
2387 template<typename T> static T assert_cast(T t) { return t; }
2388 template<typename T> static T assert_cast(...) {
2389 llvm_unreachable("bad assert_cast");
2392 /// \brief Merge together the pattern declarations from two template
2394 void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2395 RedeclarableTemplateDecl *Existing,
2396 DeclID DsID, bool IsKeyDecl) {
2397 auto *DPattern = D->getTemplatedDecl();
2398 auto *ExistingPattern = Existing->getTemplatedDecl();
2399 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2400 DPattern->getCanonicalDecl()->getGlobalID(),
2403 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2404 // Merge with any existing definition.
2405 // FIXME: This is duplicated in several places. Refactor.
2406 auto *ExistingClass =
2407 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2408 if (auto *DDD = DClass->DefinitionData) {
2409 if (ExistingClass->DefinitionData) {
2410 MergeDefinitionData(ExistingClass, std::move(*DDD));
2412 ExistingClass->DefinitionData = DClass->DefinitionData;
2413 // We may have skipped this before because we thought that DClass
2414 // was the canonical declaration.
2415 Reader.PendingDefinitions.insert(DClass);
2418 DClass->DefinitionData = ExistingClass->DefinitionData;
2420 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2423 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2424 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2426 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2427 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2428 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2429 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2431 llvm_unreachable("merged an unknown kind of redeclarable template");
2434 /// \brief Attempts to merge the given declaration (D) with another declaration
2435 /// of the same entity.
2436 template<typename T>
2437 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2438 RedeclarableResult &Redecl,
2439 DeclID TemplatePatternID) {
2440 T *D = static_cast<T*>(DBase);
2441 T *ExistingCanon = Existing->getCanonicalDecl();
2442 T *DCanon = D->getCanonicalDecl();
2443 if (ExistingCanon != DCanon) {
2444 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2445 "already merged this declaration");
2447 // Have our redeclaration link point back at the canonical declaration
2448 // of the existing declaration, so that this declaration has the
2449 // appropriate canonical declaration.
2450 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2451 D->First = ExistingCanon;
2452 ExistingCanon->Used |= D->Used;
2455 // When we merge a namespace, update its pointer to the first namespace.
2456 // We cannot have loaded any redeclarations of this declaration yet, so
2457 // there's nothing else that needs to be updated.
2458 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2459 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2460 assert_cast<NamespaceDecl*>(ExistingCanon));
2462 // When we merge a template, merge its pattern.
2463 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2464 mergeTemplatePattern(
2465 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2466 TemplatePatternID, Redecl.isKeyDecl());
2468 // If this declaration is a key declaration, make a note of that.
2469 if (Redecl.isKeyDecl())
2470 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2474 /// \brief Attempts to merge the given declaration (D) with another declaration
2475 /// of the same entity, for the case where the entity is not actually
2476 /// redeclarable. This happens, for instance, when merging the fields of
2477 /// identical class definitions from two different modules.
2478 template<typename T>
2479 void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2480 // If modules are not available, there is no reason to perform this merge.
2481 if (!Reader.getContext().getLangOpts().Modules)
2484 // ODR-based merging is only performed in C++. In C, identically-named things
2485 // in different translation units are not redeclarations (but may still have
2486 // compatible types).
2487 if (!Reader.getContext().getLangOpts().CPlusPlus)
2490 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2491 if (T *Existing = ExistingRes)
2492 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2493 Existing->getCanonicalDecl());
2496 void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2498 unsigned NumVars = D->varlist_size();
2499 SmallVector<Expr *, 16> Vars;
2500 Vars.reserve(NumVars);
2501 for (unsigned i = 0; i != NumVars; ++i) {
2502 Vars.push_back(Record.readExpr());
2507 void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2509 D->setLocation(ReadSourceLocation());
2510 D->setCombiner(Record.readExpr());
2511 D->setInitializer(Record.readExpr());
2512 D->PrevDeclInScope = ReadDeclID();
2515 void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2519 //===----------------------------------------------------------------------===//
2520 // Attribute Reading
2521 //===----------------------------------------------------------------------===//
2523 /// \brief Reads attributes from the current stream position.
2524 void ASTReader::ReadAttributes(ASTRecordReader &Record, AttrVec &Attrs) {
2525 for (unsigned i = 0, e = Record.readInt(); i != e; ++i) {
2526 Attr *New = nullptr;
2527 attr::Kind Kind = (attr::Kind)Record.readInt();
2528 SourceRange Range = Record.readSourceRange();
2529 ASTContext &Context = getContext();
2531 #include "clang/Serialization/AttrPCHRead.inc"
2533 assert(New && "Unable to decode attribute?");
2534 Attrs.push_back(New);
2538 //===----------------------------------------------------------------------===//
2539 // ASTReader Implementation
2540 //===----------------------------------------------------------------------===//
2542 /// \brief Note that we have loaded the declaration with the given
2545 /// This routine notes that this declaration has already been loaded,
2546 /// so that future GetDecl calls will return this declaration rather
2547 /// than trying to load a new declaration.
2548 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2549 assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2550 DeclsLoaded[Index] = D;
2554 /// \brief Determine whether the consumer will be interested in seeing
2555 /// this declaration (via HandleTopLevelDecl).
2557 /// This routine should return true for anything that might affect
2558 /// code generation, e.g., inline function definitions, Objective-C
2559 /// declarations with metadata, etc.
2560 static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2561 // An ObjCMethodDecl is never considered as "interesting" because its
2562 // implementation container always is.
2564 // An ImportDecl or VarDecl imported from a module will get emitted when
2565 // we import the relevant module.
2566 if ((isa<ImportDecl>(D) || isa<VarDecl>(D)) && D->getImportedOwningModule() &&
2567 Ctx.DeclMustBeEmitted(D))
2570 if (isa<FileScopeAsmDecl>(D) ||
2571 isa<ObjCProtocolDecl>(D) ||
2572 isa<ObjCImplDecl>(D) ||
2573 isa<ImportDecl>(D) ||
2574 isa<PragmaCommentDecl>(D) ||
2575 isa<PragmaDetectMismatchDecl>(D))
2577 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D))
2578 return !D->getDeclContext()->isFunctionOrMethod();
2579 if (VarDecl *Var = dyn_cast<VarDecl>(D))
2580 return Var->isFileVarDecl() &&
2581 Var->isThisDeclarationADefinition() == VarDecl::Definition;
2582 if (FunctionDecl *Func = dyn_cast<FunctionDecl>(D))
2583 return Func->doesThisDeclarationHaveABody() || HasBody;
2585 if (auto *ES = D->getASTContext().getExternalSource())
2586 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2592 /// \brief Get the correct cursor and offset for loading a declaration.
2593 ASTReader::RecordLocation
2594 ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2595 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2596 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2597 ModuleFile *M = I->second;
2598 const DeclOffset &DOffs =
2599 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2600 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2601 return RecordLocation(M, DOffs.BitOffset);
2604 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2605 ContinuousRangeMap<uint64_t, ModuleFile*, 4>::iterator I
2606 = GlobalBitOffsetsMap.find(GlobalOffset);
2608 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2609 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2612 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2613 return LocalOffset + M.GlobalBitOffset;
2616 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2617 const TemplateParameterList *Y);
2619 /// \brief Determine whether two template parameters are similar enough
2620 /// that they may be used in declarations of the same template.
2621 static bool isSameTemplateParameter(const NamedDecl *X,
2622 const NamedDecl *Y) {
2623 if (X->getKind() != Y->getKind())
2626 if (const TemplateTypeParmDecl *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2627 const TemplateTypeParmDecl *TY = cast<TemplateTypeParmDecl>(Y);
2628 return TX->isParameterPack() == TY->isParameterPack();
2631 if (const NonTypeTemplateParmDecl *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2632 const NonTypeTemplateParmDecl *TY = cast<NonTypeTemplateParmDecl>(Y);
2633 return TX->isParameterPack() == TY->isParameterPack() &&
2634 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2637 const TemplateTemplateParmDecl *TX = cast<TemplateTemplateParmDecl>(X);
2638 const TemplateTemplateParmDecl *TY = cast<TemplateTemplateParmDecl>(Y);
2639 return TX->isParameterPack() == TY->isParameterPack() &&
2640 isSameTemplateParameterList(TX->getTemplateParameters(),
2641 TY->getTemplateParameters());
2644 static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2645 if (auto *NS = X->getAsNamespace())
2647 if (auto *NAS = X->getAsNamespaceAlias())
2648 return NAS->getNamespace();
2652 static bool isSameQualifier(const NestedNameSpecifier *X,
2653 const NestedNameSpecifier *Y) {
2654 if (auto *NSX = getNamespace(X)) {
2655 auto *NSY = getNamespace(Y);
2656 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2658 } else if (X->getKind() != Y->getKind())
2661 // FIXME: For namespaces and types, we're permitted to check that the entity
2662 // is named via the same tokens. We should probably do so.
2663 switch (X->getKind()) {
2664 case NestedNameSpecifier::Identifier:
2665 if (X->getAsIdentifier() != Y->getAsIdentifier())
2668 case NestedNameSpecifier::Namespace:
2669 case NestedNameSpecifier::NamespaceAlias:
2670 // We've already checked that we named the same namespace.
2672 case NestedNameSpecifier::TypeSpec:
2673 case NestedNameSpecifier::TypeSpecWithTemplate:
2674 if (X->getAsType()->getCanonicalTypeInternal() !=
2675 Y->getAsType()->getCanonicalTypeInternal())
2678 case NestedNameSpecifier::Global:
2679 case NestedNameSpecifier::Super:
2683 // Recurse into earlier portion of NNS, if any.
2684 auto *PX = X->getPrefix();
2685 auto *PY = Y->getPrefix();
2687 return isSameQualifier(PX, PY);
2691 /// \brief Determine whether two template parameter lists are similar enough
2692 /// that they may be used in declarations of the same template.
2693 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2694 const TemplateParameterList *Y) {
2695 if (X->size() != Y->size())
2698 for (unsigned I = 0, N = X->size(); I != N; ++I)
2699 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2705 /// Determine whether the attributes we can overload on are identical for A and
2706 /// B. Will ignore any overloadable attrs represented in the type of A and B.
2707 static bool hasSameOverloadableAttrs(const FunctionDecl *A,
2708 const FunctionDecl *B) {
2709 // Note that pass_object_size attributes are represented in the function's
2710 // ExtParameterInfo, so we don't need to check them here.
2712 SmallVector<const EnableIfAttr *, 4> AEnableIfs;
2713 // Since this is an equality check, we can ignore that enable_if attrs show up
2714 // in reverse order.
2715 for (const auto *EIA : A->specific_attrs<EnableIfAttr>())
2716 AEnableIfs.push_back(EIA);
2718 SmallVector<const EnableIfAttr *, 4> BEnableIfs;
2719 for (const auto *EIA : B->specific_attrs<EnableIfAttr>())
2720 BEnableIfs.push_back(EIA);
2722 // Two very common cases: either we have 0 enable_if attrs, or we have an
2723 // unequal number of enable_if attrs.
2724 if (AEnableIfs.empty() && BEnableIfs.empty())
2727 if (AEnableIfs.size() != BEnableIfs.size())
2730 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2731 for (unsigned I = 0, E = AEnableIfs.size(); I != E; ++I) {
2735 AEnableIfs[I]->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2736 BEnableIfs[I]->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2737 if (Cand1ID != Cand2ID)
2744 /// \brief Determine whether the two declarations refer to the same entity.
2745 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2746 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2751 // Must be in the same context.
2752 if (!X->getDeclContext()->getRedeclContext()->Equals(
2753 Y->getDeclContext()->getRedeclContext()))
2756 // Two typedefs refer to the same entity if they have the same underlying
2758 if (TypedefNameDecl *TypedefX = dyn_cast<TypedefNameDecl>(X))
2759 if (TypedefNameDecl *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2760 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2761 TypedefY->getUnderlyingType());
2763 // Must have the same kind.
2764 if (X->getKind() != Y->getKind())
2767 // Objective-C classes and protocols with the same name always match.
2768 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2771 if (isa<ClassTemplateSpecializationDecl>(X)) {
2772 // No need to handle these here: we merge them when adding them to the
2777 // Compatible tags match.
2778 if (TagDecl *TagX = dyn_cast<TagDecl>(X)) {
2779 TagDecl *TagY = cast<TagDecl>(Y);
2780 return (TagX->getTagKind() == TagY->getTagKind()) ||
2781 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2782 TagX->getTagKind() == TTK_Interface) &&
2783 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2784 TagY->getTagKind() == TTK_Interface));
2787 // Functions with the same type and linkage match.
2788 // FIXME: This needs to cope with merging of prototyped/non-prototyped
2790 if (FunctionDecl *FuncX = dyn_cast<FunctionDecl>(X)) {
2791 FunctionDecl *FuncY = cast<FunctionDecl>(Y);
2792 if (CXXConstructorDecl *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
2793 CXXConstructorDecl *CtorY = cast<CXXConstructorDecl>(Y);
2794 if (CtorX->getInheritedConstructor() &&
2795 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
2796 CtorY->getInheritedConstructor().getConstructor()))
2799 ASTContext &C = FuncX->getASTContext();
2800 if (!C.hasSameType(FuncX->getType(), FuncY->getType())) {
2801 // We can get functions with different types on the redecl chain in C++17
2802 // if they have differing exception specifications and at least one of
2803 // the excpetion specs is unresolved.
2804 // FIXME: Do we need to check for C++14 deduced return types here too?
2805 auto *XFPT = FuncX->getType()->getAs<FunctionProtoType>();
2806 auto *YFPT = FuncY->getType()->getAs<FunctionProtoType>();
2807 if (C.getLangOpts().CPlusPlus1z && XFPT && YFPT &&
2808 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
2809 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
2810 C.hasSameFunctionTypeIgnoringExceptionSpec(FuncX->getType(),
2815 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
2816 hasSameOverloadableAttrs(FuncX, FuncY);
2819 // Variables with the same type and linkage match.
2820 if (VarDecl *VarX = dyn_cast<VarDecl>(X)) {
2821 VarDecl *VarY = cast<VarDecl>(Y);
2822 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
2823 ASTContext &C = VarX->getASTContext();
2824 if (C.hasSameType(VarX->getType(), VarY->getType()))
2827 // We can get decls with different types on the redecl chain. Eg.
2828 // template <typename T> struct S { static T Var[]; }; // #1
2829 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
2830 // Only? happens when completing an incomplete array type. In this case
2831 // when comparing #1 and #2 we should go through their element type.
2832 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
2833 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
2834 if (!VarXTy || !VarYTy)
2836 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
2837 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
2842 // Namespaces with the same name and inlinedness match.
2843 if (NamespaceDecl *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
2844 NamespaceDecl *NamespaceY = cast<NamespaceDecl>(Y);
2845 return NamespaceX->isInline() == NamespaceY->isInline();
2848 // Identical template names and kinds match if their template parameter lists
2849 // and patterns match.
2850 if (TemplateDecl *TemplateX = dyn_cast<TemplateDecl>(X)) {
2851 TemplateDecl *TemplateY = cast<TemplateDecl>(Y);
2852 return isSameEntity(TemplateX->getTemplatedDecl(),
2853 TemplateY->getTemplatedDecl()) &&
2854 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
2855 TemplateY->getTemplateParameters());
2858 // Fields with the same name and the same type match.
2859 if (FieldDecl *FDX = dyn_cast<FieldDecl>(X)) {
2860 FieldDecl *FDY = cast<FieldDecl>(Y);
2861 // FIXME: Also check the bitwidth is odr-equivalent, if any.
2862 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
2865 // Indirect fields with the same target field match.
2866 if (auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
2867 auto *IFDY = cast<IndirectFieldDecl>(Y);
2868 return IFDX->getAnonField()->getCanonicalDecl() ==
2869 IFDY->getAnonField()->getCanonicalDecl();
2872 // Enumerators with the same name match.
2873 if (isa<EnumConstantDecl>(X))
2874 // FIXME: Also check the value is odr-equivalent.
2877 // Using shadow declarations with the same target match.
2878 if (UsingShadowDecl *USX = dyn_cast<UsingShadowDecl>(X)) {
2879 UsingShadowDecl *USY = cast<UsingShadowDecl>(Y);
2880 return USX->getTargetDecl() == USY->getTargetDecl();
2883 // Using declarations with the same qualifier match. (We already know that
2884 // the name matches.)
2885 if (auto *UX = dyn_cast<UsingDecl>(X)) {
2886 auto *UY = cast<UsingDecl>(Y);
2887 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2888 UX->hasTypename() == UY->hasTypename() &&
2889 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2891 if (auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
2892 auto *UY = cast<UnresolvedUsingValueDecl>(Y);
2893 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2894 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2896 if (auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
2897 return isSameQualifier(
2899 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
2901 // Namespace alias definitions with the same target match.
2902 if (auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
2903 auto *NAY = cast<NamespaceAliasDecl>(Y);
2904 return NAX->getNamespace()->Equals(NAY->getNamespace());
2910 /// Find the context in which we should search for previous declarations when
2911 /// looking for declarations to merge.
2912 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
2914 if (NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC))
2915 return ND->getOriginalNamespace();
2917 if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) {
2918 // Try to dig out the definition.
2919 auto *DD = RD->DefinitionData;
2921 DD = RD->getCanonicalDecl()->DefinitionData;
2923 // If there's no definition yet, then DC's definition is added by an update
2924 // record, but we've not yet loaded that update record. In this case, we
2925 // commit to DC being the canonical definition now, and will fix this when
2926 // we load the update record.
2928 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
2929 RD->IsCompleteDefinition = true;
2930 RD->DefinitionData = DD;
2931 RD->getCanonicalDecl()->DefinitionData = DD;
2933 // Track that we did this horrible thing so that we can fix it later.
2934 Reader.PendingFakeDefinitionData.insert(
2935 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
2938 return DD->Definition;
2941 if (EnumDecl *ED = dyn_cast<EnumDecl>(DC))
2942 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
2945 // We can see the TU here only if we have no Sema object. In that case,
2946 // there's no TU scope to look in, so using the DC alone is sufficient.
2947 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
2953 ASTDeclReader::FindExistingResult::~FindExistingResult() {
2954 // Record that we had a typedef name for linkage whether or not we merge
2955 // with that declaration.
2956 if (TypedefNameForLinkage) {
2957 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2958 Reader.ImportedTypedefNamesForLinkage.insert(
2959 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
2963 if (!AddResult || Existing)
2966 DeclarationName Name = New->getDeclName();
2967 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2968 if (needsAnonymousDeclarationNumber(New)) {
2969 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
2970 AnonymousDeclNumber, New);
2971 } else if (DC->isTranslationUnit() &&
2972 !Reader.getContext().getLangOpts().CPlusPlus) {
2973 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
2974 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
2976 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
2977 // Add the declaration to its redeclaration context so later merging
2978 // lookups will find it.
2979 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
2983 /// Find the declaration that should be merged into, given the declaration found
2984 /// by name lookup. If we're merging an anonymous declaration within a typedef,
2985 /// we need a matching typedef, and we merge with the type inside it.
2986 static NamedDecl *getDeclForMerging(NamedDecl *Found,
2987 bool IsTypedefNameForLinkage) {
2988 if (!IsTypedefNameForLinkage)
2991 // If we found a typedef declaration that gives a name to some other
2992 // declaration, then we want that inner declaration. Declarations from
2993 // AST files are handled via ImportedTypedefNamesForLinkage.
2994 if (Found->isFromASTFile())
2997 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
2998 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3003 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3006 // If the lexical context has been merged, look into the now-canonical
3008 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
3011 // If we've seen this before, return the canonical declaration.
3012 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
3013 if (Index < Previous.size() && Previous[Index])
3014 return Previous[Index];
3016 // If this is the first time, but we have parsed a declaration of the context,
3017 // build the anonymous declaration list from the parsed declaration.
3018 if (!cast<Decl>(DC)->isFromASTFile()) {
3019 numberAnonymousDeclsWithin(DC, [&](NamedDecl *ND, unsigned Number) {
3020 if (Previous.size() == Number)
3021 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3023 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3027 return Index < Previous.size() ? Previous[Index] : nullptr;
3030 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3031 DeclContext *DC, unsigned Index,
3033 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
3036 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
3037 if (Index >= Previous.size())
3038 Previous.resize(Index + 1);
3039 if (!Previous[Index])
3040 Previous[Index] = D;
3043 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3044 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3047 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3048 // Don't bother trying to find unnamed declarations that are in
3049 // unmergeable contexts.
3050 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3051 AnonymousDeclNumber, TypedefNameForLinkage);
3056 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3057 if (TypedefNameForLinkage) {
3058 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3059 std::make_pair(DC, TypedefNameForLinkage));
3060 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3061 if (isSameEntity(It->second, D))
3062 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3063 TypedefNameForLinkage);
3064 // Go on to check in other places in case an existing typedef name
3065 // was not imported.
3068 if (needsAnonymousDeclarationNumber(D)) {
3069 // This is an anonymous declaration that we may need to merge. Look it up
3070 // in its context by number.
3071 if (auto *Existing = getAnonymousDeclForMerging(
3072 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3073 if (isSameEntity(Existing, D))
3074 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3075 TypedefNameForLinkage);
3076 } else if (DC->isTranslationUnit() &&
3077 !Reader.getContext().getLangOpts().CPlusPlus) {
3078 IdentifierResolver &IdResolver = Reader.getIdResolver();
3080 // Temporarily consider the identifier to be up-to-date. We don't want to
3081 // cause additional lookups here.
3082 class UpToDateIdentifierRAII {
3087 explicit UpToDateIdentifierRAII(IdentifierInfo *II)
3088 : II(II), WasOutToDate(false)
3091 WasOutToDate = II->isOutOfDate();
3093 II->setOutOfDate(false);
3097 ~UpToDateIdentifierRAII() {
3099 II->setOutOfDate(true);
3101 } UpToDate(Name.getAsIdentifierInfo());
3103 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3104 IEnd = IdResolver.end();
3106 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3107 if (isSameEntity(Existing, D))
3108 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3109 TypedefNameForLinkage);
3111 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3112 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3113 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3114 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3115 if (isSameEntity(Existing, D))
3116 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3117 TypedefNameForLinkage);
3120 // Not in a mergeable context.
3121 return FindExistingResult(Reader);
3124 // If this declaration is from a merged context, make a note that we need to
3125 // check that the canonical definition of that context contains the decl.
3127 // FIXME: We should do something similar if we merge two definitions of the
3128 // same template specialization into the same CXXRecordDecl.
3129 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3130 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3131 MergedDCIt->second == D->getDeclContext())
3132 Reader.PendingOdrMergeChecks.push_back(D);
3134 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3135 AnonymousDeclNumber, TypedefNameForLinkage);
3138 template<typename DeclT>
3139 Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3140 return D->RedeclLink.getLatestNotUpdated();
3142 Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3143 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3146 Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3149 switch (D->getKind()) {
3150 #define ABSTRACT_DECL(TYPE)
3151 #define DECL(TYPE, BASE) \
3153 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3154 #include "clang/AST/DeclNodes.inc"
3156 llvm_unreachable("unknown decl kind");
3159 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3160 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3163 template<typename DeclT>
3164 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3165 Redeclarable<DeclT> *D,
3166 Decl *Previous, Decl *Canon) {
3167 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3168 D->First = cast<DeclT>(Previous)->First;
3173 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3174 Redeclarable<VarDecl> *D,
3175 Decl *Previous, Decl *Canon) {
3176 VarDecl *VD = static_cast<VarDecl*>(D);
3177 VarDecl *PrevVD = cast<VarDecl>(Previous);
3178 D->RedeclLink.setPrevious(PrevVD);
3179 D->First = PrevVD->First;
3181 // We should keep at most one definition on the chain.
3182 // FIXME: Cache the definition once we've found it. Building a chain with
3183 // N definitions currently takes O(N^2) time here.
3184 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3185 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3186 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3187 Reader.mergeDefinitionVisibility(CurD, VD);
3188 VD->demoteThisDefinitionToDeclaration();
3196 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3197 Redeclarable<FunctionDecl> *D,
3198 Decl *Previous, Decl *Canon) {
3199 FunctionDecl *FD = static_cast<FunctionDecl*>(D);
3200 FunctionDecl *PrevFD = cast<FunctionDecl>(Previous);
3202 FD->RedeclLink.setPrevious(PrevFD);
3203 FD->First = PrevFD->First;
3205 // If the previous declaration is an inline function declaration, then this
3206 // declaration is too.
3207 if (PrevFD->IsInline != FD->IsInline) {
3208 // FIXME: [dcl.fct.spec]p4:
3209 // If a function with external linkage is declared inline in one
3210 // translation unit, it shall be declared inline in all translation
3211 // units in which it appears.
3213 // Be careful of this case:
3216 // template<typename T> struct X { void f(); };
3217 // template<typename T> inline void X<T>::f() {}
3219 // module B instantiates the declaration of X<int>::f
3220 // module C instantiates the definition of X<int>::f
3222 // If module B and C are merged, we do not have a violation of this rule.
3223 FD->IsInline = true;
3226 // If we need to propagate an exception specification along the redecl
3227 // chain, make a note of that so that we can do so later.
3228 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3229 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3230 if (FPT && PrevFPT) {
3231 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3232 bool WasUnresolved =
3233 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3234 if (IsUnresolved != WasUnresolved)
3235 Reader.PendingExceptionSpecUpdates.insert(
3236 std::make_pair(Canon, IsUnresolved ? PrevFD : FD));
3239 } // end namespace clang
3241 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3242 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3245 /// Inherit the default template argument from \p From to \p To. Returns
3246 /// \c false if there is no default template for \p From.
3247 template <typename ParmDecl>
3248 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3250 auto *To = cast<ParmDecl>(ToD);
3251 if (!From->hasDefaultArgument())
3253 To->setInheritedDefaultArgument(Context, From);
3257 static void inheritDefaultTemplateArguments(ASTContext &Context,
3260 auto *FromTP = From->getTemplateParameters();
3261 auto *ToTP = To->getTemplateParameters();
3262 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3264 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3265 NamedDecl *FromParam = FromTP->getParam(N - I - 1);
3266 if (FromParam->isParameterPack())
3268 NamedDecl *ToParam = ToTP->getParam(N - I - 1);
3270 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam)) {
3271 if (!inheritDefaultTemplateArgument(Context, FTTP, ToParam))
3273 } else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam)) {
3274 if (!inheritDefaultTemplateArgument(Context, FNTTP, ToParam))
3277 if (!inheritDefaultTemplateArgument(
3278 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam))
3284 void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3285 Decl *Previous, Decl *Canon) {
3286 assert(D && Previous);
3288 switch (D->getKind()) {
3289 #define ABSTRACT_DECL(TYPE)
3290 #define DECL(TYPE, BASE) \
3292 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3294 #include "clang/AST/DeclNodes.inc"
3297 // If the declaration was visible in one module, a redeclaration of it in
3298 // another module remains visible even if it wouldn't be visible by itself.
3300 // FIXME: In this case, the declaration should only be visible if a module
3301 // that makes it visible has been imported.
3302 D->IdentifierNamespace |=
3303 Previous->IdentifierNamespace &
3304 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3306 // If the declaration declares a template, it may inherit default arguments
3307 // from the previous declaration.
3308 if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D))
3309 inheritDefaultTemplateArguments(Reader.getContext(),
3310 cast<TemplateDecl>(Previous), TD);
3313 template<typename DeclT>
3314 void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3315 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3317 void ASTDeclReader::attachLatestDeclImpl(...) {
3318 llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3321 void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3322 assert(D && Latest);
3324 switch (D->getKind()) {
3325 #define ABSTRACT_DECL(TYPE)
3326 #define DECL(TYPE, BASE) \
3328 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3330 #include "clang/AST/DeclNodes.inc"
3334 template<typename DeclT>
3335 void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3336 D->RedeclLink.markIncomplete();
3338 void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3339 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3342 void ASTReader::markIncompleteDeclChain(Decl *D) {
3343 switch (D->getKind()) {
3344 #define ABSTRACT_DECL(TYPE)
3345 #define DECL(TYPE, BASE) \
3347 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3349 #include "clang/AST/DeclNodes.inc"
3353 /// \brief Read the declaration at the given offset from the AST file.
3354 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3355 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3356 SourceLocation DeclLoc;
3357 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3358 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3359 // Keep track of where we are in the stream, then jump back there
3360 // after reading this declaration.
3361 SavedStreamPosition SavedPosition(DeclsCursor);
3363 ReadingKindTracker ReadingKind(Read_Decl, *this);
3365 // Note that we are loading a declaration record.
3366 Deserializing ADecl(this);
3368 DeclsCursor.JumpToBit(Loc.Offset);
3369 ASTRecordReader Record(*this, *Loc.F);
3370 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3371 unsigned Code = DeclsCursor.ReadCode();
3373 ASTContext &Context = getContext();
3375 switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3376 case DECL_CONTEXT_LEXICAL:
3377 case DECL_CONTEXT_VISIBLE:
3378 llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3380 D = TypedefDecl::CreateDeserialized(Context, ID);
3382 case DECL_TYPEALIAS:
3383 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3386 D = EnumDecl::CreateDeserialized(Context, ID);
3389 D = RecordDecl::CreateDeserialized(Context, ID);
3391 case DECL_ENUM_CONSTANT:
3392 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3395 D = FunctionDecl::CreateDeserialized(Context, ID);
3397 case DECL_LINKAGE_SPEC:
3398 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3401 D = ExportDecl::CreateDeserialized(Context, ID);
3404 D = LabelDecl::CreateDeserialized(Context, ID);
3406 case DECL_NAMESPACE:
3407 D = NamespaceDecl::CreateDeserialized(Context, ID);
3409 case DECL_NAMESPACE_ALIAS:
3410 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3413 D = UsingDecl::CreateDeserialized(Context, ID);
3415 case DECL_USING_PACK:
3416 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3418 case DECL_USING_SHADOW:
3419 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3421 case DECL_CONSTRUCTOR_USING_SHADOW:
3422 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3424 case DECL_USING_DIRECTIVE:
3425 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3427 case DECL_UNRESOLVED_USING_VALUE:
3428 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3430 case DECL_UNRESOLVED_USING_TYPENAME:
3431 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3433 case DECL_CXX_RECORD:
3434 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3436 case DECL_CXX_DEDUCTION_GUIDE:
3437 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3439 case DECL_CXX_METHOD:
3440 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3442 case DECL_CXX_CONSTRUCTOR:
3443 D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3445 case DECL_CXX_INHERITED_CONSTRUCTOR:
3446 D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3448 case DECL_CXX_DESTRUCTOR:
3449 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3451 case DECL_CXX_CONVERSION:
3452 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3454 case DECL_ACCESS_SPEC:
3455 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3458 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3460 case DECL_FRIEND_TEMPLATE:
3461 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3463 case DECL_CLASS_TEMPLATE:
3464 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3466 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3467 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3469 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3470 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3472 case DECL_VAR_TEMPLATE:
3473 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3475 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3476 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3478 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3479 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3481 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3482 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3484 case DECL_FUNCTION_TEMPLATE:
3485 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3487 case DECL_TEMPLATE_TYPE_PARM:
3488 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3490 case DECL_NON_TYPE_TEMPLATE_PARM:
3491 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3493 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3494 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3497 case DECL_TEMPLATE_TEMPLATE_PARM:
3498 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3500 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3501 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3504 case DECL_TYPE_ALIAS_TEMPLATE:
3505 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3507 case DECL_STATIC_ASSERT:
3508 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3510 case DECL_OBJC_METHOD:
3511 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3513 case DECL_OBJC_INTERFACE:
3514 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3516 case DECL_OBJC_IVAR:
3517 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3519 case DECL_OBJC_PROTOCOL:
3520 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3522 case DECL_OBJC_AT_DEFS_FIELD:
3523 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3525 case DECL_OBJC_CATEGORY:
3526 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3528 case DECL_OBJC_CATEGORY_IMPL:
3529 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3531 case DECL_OBJC_IMPLEMENTATION:
3532 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3534 case DECL_OBJC_COMPATIBLE_ALIAS:
3535 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3537 case DECL_OBJC_PROPERTY:
3538 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3540 case DECL_OBJC_PROPERTY_IMPL:
3541 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3544 D = FieldDecl::CreateDeserialized(Context, ID);
3546 case DECL_INDIRECTFIELD:
3547 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3550 D = VarDecl::CreateDeserialized(Context, ID);
3552 case DECL_IMPLICIT_PARAM:
3553 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3556 D = ParmVarDecl::CreateDeserialized(Context, ID);
3558 case DECL_DECOMPOSITION:
3559 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3562 D = BindingDecl::CreateDeserialized(Context, ID);
3564 case DECL_FILE_SCOPE_ASM:
3565 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3568 D = BlockDecl::CreateDeserialized(Context, ID);
3570 case DECL_MS_PROPERTY:
3571 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3574 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3576 case DECL_CXX_BASE_SPECIFIERS:
3577 Error("attempt to read a C++ base-specifier record as a declaration");
3579 case DECL_CXX_CTOR_INITIALIZERS:
3580 Error("attempt to read a C++ ctor initializer record as a declaration");
3583 // Note: last entry of the ImportDecl record is the number of stored source
3585 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3587 case DECL_OMP_THREADPRIVATE:
3588 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3590 case DECL_OMP_DECLARE_REDUCTION:
3591 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
3593 case DECL_OMP_CAPTUREDEXPR:
3594 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3596 case DECL_PRAGMA_COMMENT:
3597 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3599 case DECL_PRAGMA_DETECT_MISMATCH:
3600 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
3604 D = EmptyDecl::CreateDeserialized(Context, ID);
3606 case DECL_OBJC_TYPE_PARAM:
3607 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3611 assert(D && "Unknown declaration reading AST file");
3612 LoadedDecl(Index, D);
3613 // Set the DeclContext before doing any deserialization, to make sure internal
3614 // calls to Decl::getASTContext() by Decl's methods will find the
3615 // TranslationUnitDecl without crashing.
3616 D->setDeclContext(Context.getTranslationUnitDecl());
3619 // If this declaration is also a declaration context, get the
3620 // offsets for its tables of lexical and visible declarations.
3621 if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
3622 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3623 if (Offsets.first &&
3624 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3626 if (Offsets.second &&
3627 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3630 assert(Record.getIdx() == Record.size());
3632 // Load any relevant update records.
3633 PendingUpdateRecords.push_back(
3634 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3636 // Load the categories after recursive loading is finished.
3637 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(D))
3638 // If we already have a definition when deserializing the ObjCInterfaceDecl,
3639 // we put the Decl in PendingDefinitions so we can pull the categories here.
3640 if (Class->isThisDeclarationADefinition() ||
3641 PendingDefinitions.count(Class))
3642 loadObjCCategories(ID, Class);
3644 // If we have deserialized a declaration that has a definition the
3645 // AST consumer might need to know about, queue it.
3646 // We don't pass it to the consumer immediately because we may be in recursive
3647 // loading, and some declarations may still be initializing.
3648 PotentiallyInterestingDecls.push_back(
3649 InterestingDecl(D, Reader.hasPendingBody()));
3654 void ASTReader::PassInterestingDeclsToConsumer() {
3657 if (PassingDeclsToConsumer)
3660 // Guard variable to avoid recursively redoing the process of passing
3661 // decls to consumer.
3662 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3665 // Ensure that we've loaded all potentially-interesting declarations
3666 // that need to be eagerly loaded.
3667 for (auto ID : EagerlyDeserializedDecls)
3669 EagerlyDeserializedDecls.clear();
3671 while (!PotentiallyInterestingDecls.empty()) {
3672 InterestingDecl D = PotentiallyInterestingDecls.front();
3673 PotentiallyInterestingDecls.pop_front();
3674 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3675 PassInterestingDeclToConsumer(D.getDecl());
3679 void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3680 // The declaration may have been modified by files later in the chain.
3681 // If this is the case, read the record containing the updates from each file
3682 // and pass it to ASTDeclReader to make the modifications.
3683 serialization::GlobalDeclID ID = Record.ID;
3685 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3686 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3688 llvm::SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3690 if (UpdI != DeclUpdateOffsets.end()) {
3691 auto UpdateOffsets = std::move(UpdI->second);
3692 DeclUpdateOffsets.erase(UpdI);
3694 // Check if this decl was interesting to the consumer. If we just loaded
3695 // the declaration, then we know it was interesting and we skip the call
3696 // to isConsumerInterestedIn because it is unsafe to call in the
3697 // current ASTReader state.
3698 bool WasInteresting =
3699 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
3700 for (auto &FileAndOffset : UpdateOffsets) {
3701 ModuleFile *F = FileAndOffset.first;
3702 uint64_t Offset = FileAndOffset.second;
3703 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3704 SavedStreamPosition SavedPosition(Cursor);
3705 Cursor.JumpToBit(Offset);
3706 unsigned Code = Cursor.ReadCode();
3707 ASTRecordReader Record(*this, *F);
3708 unsigned RecCode = Record.readRecord(Cursor, Code);
3710 assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3712 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
3714 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
3716 // We might have made this declaration interesting. If so, remember that
3717 // we need to hand it off to the consumer.
3718 if (!WasInteresting &&
3719 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
3720 PotentiallyInterestingDecls.push_back(
3721 InterestingDecl(D, Reader.hasPendingBody()));
3722 WasInteresting = true;
3726 // Add the lazy specializations to the template.
3727 assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||
3728 isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&
3729 "Must not have pending specializations");
3730 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
3731 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
3732 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
3733 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
3734 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
3735 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
3736 PendingLazySpecializationIDs.clear();
3738 // Load the pending visible updates for this decl context, if it has any.
3739 auto I = PendingVisibleUpdates.find(ID);
3740 if (I != PendingVisibleUpdates.end()) {
3741 auto VisibleUpdates = std::move(I->second);
3742 PendingVisibleUpdates.erase(I);
3744 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
3745 for (const PendingVisibleUpdate &Update : VisibleUpdates)
3746 Lookups[DC].Table.add(
3747 Update.Mod, Update.Data,
3748 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
3749 DC->setHasExternalVisibleStorage(true);
3753 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
3754 // Attach FirstLocal to the end of the decl chain.
3755 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
3756 if (FirstLocal != CanonDecl) {
3757 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
3758 ASTDeclReader::attachPreviousDecl(
3759 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
3764 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
3768 // Load the list of other redeclarations from this module file.
3769 ModuleFile *M = getOwningModuleFile(FirstLocal);
3770 assert(M && "imported decl from no module file");
3772 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
3773 SavedStreamPosition SavedPosition(Cursor);
3774 Cursor.JumpToBit(LocalOffset);
3777 unsigned Code = Cursor.ReadCode();
3778 unsigned RecCode = Cursor.readRecord(Code, Record);
3780 assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
3782 // FIXME: We have several different dispatches on decl kind here; maybe
3783 // we should instead generate one loop per kind and dispatch up-front?
3784 Decl *MostRecent = FirstLocal;
3785 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
3786 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
3787 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
3790 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
3794 /// \brief Given an ObjC interface, goes through the modules and links to the
3795 /// interface all the categories for it.
3796 class ObjCCategoriesVisitor {
3798 ObjCInterfaceDecl *Interface;
3799 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
3800 ObjCCategoryDecl *Tail;
3801 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
3802 serialization::GlobalDeclID InterfaceID;
3803 unsigned PreviousGeneration;
3805 void add(ObjCCategoryDecl *Cat) {
3806 // Only process each category once.
3807 if (!Deserialized.erase(Cat))
3810 // Check for duplicate categories.
3811 if (Cat->getDeclName()) {
3812 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
3814 Reader.getOwningModuleFile(Existing)
3815 != Reader.getOwningModuleFile(Cat)) {
3816 // FIXME: We should not warn for duplicates in diamond:
3824 // If there are duplicates in ML/MR, there will be warning when
3825 // creating MB *and* when importing MB. We should not warn when
3827 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
3828 << Interface->getDeclName() << Cat->getDeclName();
3829 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
3830 } else if (!Existing) {
3831 // Record this category.
3836 // Add this category to the end of the chain.
3838 ASTDeclReader::setNextObjCCategory(Tail, Cat);
3840 Interface->setCategoryListRaw(Cat);
3845 ObjCCategoriesVisitor(ASTReader &Reader,
3846 ObjCInterfaceDecl *Interface,
3847 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
3848 serialization::GlobalDeclID InterfaceID,
3849 unsigned PreviousGeneration)
3850 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
3851 Tail(nullptr), InterfaceID(InterfaceID),
3852 PreviousGeneration(PreviousGeneration)
3854 // Populate the name -> category map with the set of known categories.
3855 for (auto *Cat : Interface->known_categories()) {
3856 if (Cat->getDeclName())
3857 NameCategoryMap[Cat->getDeclName()] = Cat;
3859 // Keep track of the tail of the category list.
3864 bool operator()(ModuleFile &M) {
3865 // If we've loaded all of the category information we care about from
3866 // this module file, we're done.
3867 if (M.Generation <= PreviousGeneration)
3870 // Map global ID of the definition down to the local ID used in this
3871 // module file. If there is no such mapping, we'll find nothing here
3872 // (or in any module it imports).
3873 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
3877 // Perform a binary search to find the local redeclarations for this
3878 // declaration (if any).
3879 const ObjCCategoriesInfo Compare = { LocalID, 0 };
3880 const ObjCCategoriesInfo *Result
3881 = std::lower_bound(M.ObjCCategoriesMap,
3882 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
3884 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
3885 Result->DefinitionID != LocalID) {
3886 // We didn't find anything. If the class definition is in this module
3887 // file, then the module files it depends on cannot have any categories,
3888 // so suppress further lookup.
3889 return Reader.isDeclIDFromModule(InterfaceID, M);
3892 // We found something. Dig out all of the categories.
3893 unsigned Offset = Result->Offset;
3894 unsigned N = M.ObjCCategories[Offset];
3895 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
3896 for (unsigned I = 0; I != N; ++I)
3897 add(cast_or_null<ObjCCategoryDecl>(
3898 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
3902 } // end anonymous namespace
3904 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
3905 ObjCInterfaceDecl *D,
3906 unsigned PreviousGeneration) {
3907 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
3908 PreviousGeneration);
3909 ModuleMgr.visit(Visitor);
3912 template<typename DeclT, typename Fn>
3913 static void forAllLaterRedecls(DeclT *D, Fn F) {
3916 // Check whether we've already merged D into its redeclaration chain.
3917 // MostRecent may or may not be nullptr if D has not been merged. If
3918 // not, walk the merged redecl chain and see if it's there.
3919 auto *MostRecent = D->getMostRecentDecl();
3921 for (auto *Redecl = MostRecent; Redecl && !Found;
3922 Redecl = Redecl->getPreviousDecl())
3923 Found = (Redecl == D);
3925 // If this declaration is merged, apply the functor to all later decls.
3927 for (auto *Redecl = MostRecent; Redecl != D;
3928 Redecl = Redecl->getPreviousDecl())
3933 void ASTDeclReader::UpdateDecl(Decl *D,
3934 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
3935 while (Record.getIdx() < Record.size()) {
3936 switch ((DeclUpdateKind)Record.readInt()) {
3937 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
3938 auto *RD = cast<CXXRecordDecl>(D);
3939 // FIXME: If we also have an update record for instantiating the
3940 // definition of D, we need that to happen before we get here.
3941 Decl *MD = Record.readDecl();
3942 assert(MD && "couldn't read decl from update record");
3943 // FIXME: We should call addHiddenDecl instead, to add the member
3944 // to its DeclContext.
3945 RD->addedMember(MD);
3949 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
3950 // It will be added to the template's lazy specialization set.
3951 PendingLazySpecializationIDs.push_back(ReadDeclID());
3954 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
3955 NamespaceDecl *Anon = ReadDeclAs<NamespaceDecl>();
3957 // Each module has its own anonymous namespace, which is disjoint from
3958 // any other module's anonymous namespaces, so don't attach the anonymous
3959 // namespace at all.
3960 if (!Record.isModule()) {
3961 if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(D))
3962 TU->setAnonymousNamespace(Anon);
3964 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
3969 case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER: {
3970 VarDecl *VD = cast<VarDecl>(D);
3971 VD->getMemberSpecializationInfo()->setPointOfInstantiation(
3972 ReadSourceLocation());
3973 uint64_t Val = Record.readInt();
3974 if (Val && !VD->getInit()) {
3975 VD->setInit(Record.readExpr());
3976 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
3977 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
3978 Eval->CheckedICE = true;
3979 Eval->IsICE = Val == 3;
3985 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
3986 auto Param = cast<ParmVarDecl>(D);
3988 // We have to read the default argument regardless of whether we use it
3989 // so that hypothetical further update records aren't messed up.
3990 // TODO: Add a function to skip over the next expr record.
3991 auto DefaultArg = Record.readExpr();
3993 // Only apply the update if the parameter still has an uninstantiated
3994 // default argument.
3995 if (Param->hasUninstantiatedDefaultArg())
3996 Param->setDefaultArg(DefaultArg);
4000 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4001 auto FD = cast<FieldDecl>(D);
4002 auto DefaultInit = Record.readExpr();
4004 // Only apply the update if the field still has an uninstantiated
4005 // default member initializer.
4006 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4008 FD->setInClassInitializer(DefaultInit);
4010 // Instantiation failed. We can get here if we serialized an AST for
4011 // an invalid program.
4012 FD->removeInClassInitializer();
4017 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4018 FunctionDecl *FD = cast<FunctionDecl>(D);
4019 if (Reader.PendingBodies[FD]) {
4020 // FIXME: Maybe check for ODR violations.
4021 // It's safe to stop now because this update record is always last.
4025 if (Record.readInt()) {
4026 // Maintain AST consistency: any later redeclarations of this function
4027 // are inline if this one is. (We might have merged another declaration
4029 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4030 FD->setImplicitlyInline();
4033 FD->setInnerLocStart(ReadSourceLocation());
4034 ReadFunctionDefinition(FD);
4035 assert(Record.getIdx() == Record.size() && "lazy body must be last");
4039 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4040 auto *RD = cast<CXXRecordDecl>(D);
4041 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4042 bool HadRealDefinition =
4043 OldDD && (OldDD->Definition != RD ||
4044 !Reader.PendingFakeDefinitionData.count(OldDD));
4045 ReadCXXRecordDefinition(RD, /*Update*/true);
4047 // Visible update is handled separately.
4048 uint64_t LexicalOffset = ReadLocalOffset();
4049 if (!HadRealDefinition && LexicalOffset) {
4050 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4051 Reader.PendingFakeDefinitionData.erase(OldDD);
4054 auto TSK = (TemplateSpecializationKind)Record.readInt();
4055 SourceLocation POI = ReadSourceLocation();
4056 if (MemberSpecializationInfo *MSInfo =
4057 RD->getMemberSpecializationInfo()) {
4058 MSInfo->setTemplateSpecializationKind(TSK);
4059 MSInfo->setPointOfInstantiation(POI);
4061 ClassTemplateSpecializationDecl *Spec =
4062 cast<ClassTemplateSpecializationDecl>(RD);
4063 Spec->setTemplateSpecializationKind(TSK);
4064 Spec->setPointOfInstantiation(POI);
4066 if (Record.readInt()) {
4068 ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4069 SmallVector<TemplateArgument, 8> TemplArgs;
4070 Record.readTemplateArgumentList(TemplArgs);
4071 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4072 Reader.getContext(), TemplArgs);
4074 // FIXME: If we already have a partial specialization set,
4075 // check that it matches.
4076 if (!Spec->getSpecializedTemplateOrPartial()
4077 .is<ClassTemplatePartialSpecializationDecl *>())
4078 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4082 RD->setTagKind((TagTypeKind)Record.readInt());
4083 RD->setLocation(ReadSourceLocation());
4084 RD->setLocStart(ReadSourceLocation());
4085 RD->setBraceRange(ReadSourceRange());
4087 if (Record.readInt()) {
4089 Record.readAttributes(Attrs);
4090 // If the declaration already has attributes, we assume that some other
4091 // AST file already loaded them.
4093 D->setAttrsImpl(Attrs, Reader.getContext());
4098 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4099 // Set the 'operator delete' directly to avoid emitting another update
4101 auto *Del = ReadDeclAs<FunctionDecl>();
4102 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4103 // FIXME: Check consistency if we have an old and new operator delete.
4104 if (!First->OperatorDelete)
4105 First->OperatorDelete = Del;
4109 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4110 FunctionProtoType::ExceptionSpecInfo ESI;
4111 SmallVector<QualType, 8> ExceptionStorage;
4112 Record.readExceptionSpec(ExceptionStorage, ESI);
4114 // Update this declaration's exception specification, if needed.
4115 auto *FD = cast<FunctionDecl>(D);
4116 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4117 // FIXME: If the exception specification is already present, check that it
4119 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4120 FD->setType(Reader.getContext().getFunctionType(
4121 FPT->getReturnType(), FPT->getParamTypes(),
4122 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4124 // When we get to the end of deserializing, see if there are other decls
4125 // that we need to propagate this exception specification onto.
4126 Reader.PendingExceptionSpecUpdates.insert(
4127 std::make_pair(FD->getCanonicalDecl(), FD));
4132 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4133 // FIXME: Also do this when merging redecls.
4134 QualType DeducedResultType = Record.readType();
4135 for (auto *Redecl : merged_redecls(D)) {
4136 // FIXME: If the return type is already deduced, check that it matches.
4137 FunctionDecl *FD = cast<FunctionDecl>(Redecl);
4138 Reader.getContext().adjustDeducedFunctionResultType(FD,
4144 case UPD_DECL_MARKED_USED: {
4145 // Maintain AST consistency: any later redeclarations are used too.
4146 D->markUsed(Reader.getContext());
4150 case UPD_MANGLING_NUMBER:
4151 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4155 case UPD_STATIC_LOCAL_NUMBER:
4156 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4160 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4161 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4162 ReadSourceRange()));
4165 case UPD_DECL_EXPORTED: {
4166 unsigned SubmoduleID = readSubmoduleID();
4167 auto *Exported = cast<NamedDecl>(D);
4168 if (auto *TD = dyn_cast<TagDecl>(Exported))
4169 Exported = TD->getDefinition();
4170 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4171 if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
4172 Reader.getContext().mergeDefinitionIntoModule(cast<NamedDecl>(Exported),
4174 Reader.PendingMergedDefinitionsToDeduplicate.insert(
4175 cast<NamedDecl>(Exported));
4176 } else if (Owner && Owner->NameVisibility != Module::AllVisible) {
4177 // If Owner is made visible at some later point, make this declaration
4179 Reader.HiddenNamesMap[Owner].push_back(Exported);
4181 // The declaration is now visible.
4182 Exported->setVisibleDespiteOwningModule();
4187 case UPD_DECL_MARKED_OPENMP_DECLARETARGET:
4188 case UPD_ADDED_ATTR_TO_RECORD:
4190 Record.readAttributes(Attrs);
4191 assert(Attrs.size() == 1);
4192 D->addAttr(Attrs[0]);