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);
579 void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
581 D->setLocation(ReadSourceLocation());
582 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
583 std::string Arg = ReadString();
584 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
585 D->getTrailingObjects<char>()[Arg.size()] = '\0';
588 void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
590 D->setLocation(ReadSourceLocation());
591 std::string Name = ReadString();
592 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
593 D->getTrailingObjects<char>()[Name.size()] = '\0';
595 D->ValueStart = Name.size() + 1;
596 std::string Value = ReadString();
597 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
599 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
602 void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
603 llvm_unreachable("Translation units are not serialized");
606 void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
608 ND->setDeclName(Record.readDeclarationName());
609 AnonymousDeclNumber = Record.readInt();
612 void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
614 TD->setLocStart(ReadSourceLocation());
615 // Delay type reading until after we have fully initialized the decl.
616 TypeIDForTypeDecl = Record.getGlobalTypeID(Record.readInt());
619 ASTDeclReader::RedeclarableResult
620 ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
621 RedeclarableResult Redecl = VisitRedeclarable(TD);
623 TypeSourceInfo *TInfo = GetTypeSourceInfo();
624 if (Record.readInt()) { // isModed
625 QualType modedT = Record.readType();
626 TD->setModedTypeSourceInfo(TInfo, modedT);
628 TD->setTypeSourceInfo(TInfo);
629 // Read and discard the declaration for which this is a typedef name for
630 // linkage, if it exists. We cannot rely on our type to pull in this decl,
631 // because it might have been merged with a type from another module and
632 // thus might not refer to our version of the declaration.
637 void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
638 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
639 mergeRedeclarable(TD, Redecl);
642 void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
643 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
644 if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>())
645 // Merged when we merge the template.
646 TD->setDescribedAliasTemplate(Template);
648 mergeRedeclarable(TD, Redecl);
651 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
652 RedeclarableResult Redecl = VisitRedeclarable(TD);
655 TD->IdentifierNamespace = Record.readInt();
656 TD->setTagKind((TagDecl::TagKind)Record.readInt());
657 if (!isa<CXXRecordDecl>(TD))
658 TD->setCompleteDefinition(Record.readInt());
659 TD->setEmbeddedInDeclarator(Record.readInt());
660 TD->setFreeStanding(Record.readInt());
661 TD->setCompleteDefinitionRequired(Record.readInt());
662 TD->setBraceRange(ReadSourceRange());
664 switch (Record.readInt()) {
668 TagDecl::ExtInfo *Info = new (Reader.getContext()) TagDecl::ExtInfo();
669 ReadQualifierInfo(*Info);
670 TD->TypedefNameDeclOrQualifier = Info;
673 case 2: // TypedefNameForAnonDecl
674 NamedDeclForTagDecl = ReadDeclID();
675 TypedefNameForLinkage = Record.getIdentifierInfo();
678 llvm_unreachable("unexpected tag info kind");
681 if (!isa<CXXRecordDecl>(TD))
682 mergeRedeclarable(TD, Redecl);
686 void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
688 if (TypeSourceInfo *TI = GetTypeSourceInfo())
689 ED->setIntegerTypeSourceInfo(TI);
691 ED->setIntegerType(Record.readType());
692 ED->setPromotionType(Record.readType());
693 ED->setNumPositiveBits(Record.readInt());
694 ED->setNumNegativeBits(Record.readInt());
695 ED->IsScoped = Record.readInt();
696 ED->IsScopedUsingClassTag = Record.readInt();
697 ED->IsFixed = Record.readInt();
699 // If this is a definition subject to the ODR, and we already have a
700 // definition, merge this one into it.
701 if (ED->IsCompleteDefinition &&
702 Reader.getContext().getLangOpts().Modules &&
703 Reader.getContext().getLangOpts().CPlusPlus) {
704 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
706 // This is the first time we've seen an imported definition. Look for a
707 // local definition before deciding that we are the first definition.
708 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
709 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
716 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
717 ED->IsCompleteDefinition = false;
718 Reader.mergeDefinitionVisibility(OldDef, ED);
724 if (EnumDecl *InstED = ReadDeclAs<EnumDecl>()) {
725 TemplateSpecializationKind TSK =
726 (TemplateSpecializationKind)Record.readInt();
727 SourceLocation POI = ReadSourceLocation();
728 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
729 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
733 ASTDeclReader::RedeclarableResult
734 ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
735 RedeclarableResult Redecl = VisitTagDecl(RD);
736 RD->setHasFlexibleArrayMember(Record.readInt());
737 RD->setAnonymousStructOrUnion(Record.readInt());
738 RD->setHasObjectMember(Record.readInt());
739 RD->setHasVolatileMember(Record.readInt());
743 void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
745 VD->setType(Record.readType());
748 void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
750 if (Record.readInt())
751 ECD->setInitExpr(Record.readExpr());
752 ECD->setInitVal(Record.readAPSInt());
756 void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
758 DD->setInnerLocStart(ReadSourceLocation());
759 if (Record.readInt()) { // hasExtInfo
760 DeclaratorDecl::ExtInfo *Info
761 = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
762 ReadQualifierInfo(*Info);
767 void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
768 RedeclarableResult Redecl = VisitRedeclarable(FD);
769 VisitDeclaratorDecl(FD);
771 ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName());
772 FD->IdentifierNamespace = Record.readInt();
774 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
775 // after everything else is read.
777 FD->SClass = (StorageClass)Record.readInt();
778 FD->IsInline = Record.readInt();
779 FD->IsInlineSpecified = Record.readInt();
780 FD->IsExplicitSpecified = Record.readInt();
781 FD->IsVirtualAsWritten = Record.readInt();
782 FD->IsPure = Record.readInt();
783 FD->HasInheritedPrototype = Record.readInt();
784 FD->HasWrittenPrototype = Record.readInt();
785 FD->IsDeleted = Record.readInt();
786 FD->IsTrivial = Record.readInt();
787 FD->IsDefaulted = Record.readInt();
788 FD->IsExplicitlyDefaulted = Record.readInt();
789 FD->HasImplicitReturnZero = Record.readInt();
790 FD->IsConstexpr = Record.readInt();
791 FD->UsesSEHTry = Record.readInt();
792 FD->HasSkippedBody = Record.readInt();
793 FD->IsLateTemplateParsed = Record.readInt();
794 FD->setCachedLinkage(Linkage(Record.readInt()));
795 FD->EndRangeLoc = ReadSourceLocation();
797 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
798 case FunctionDecl::TK_NonTemplate:
799 mergeRedeclarable(FD, Redecl);
801 case FunctionDecl::TK_FunctionTemplate:
802 // Merged when we merge the template.
803 FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
805 case FunctionDecl::TK_MemberSpecialization: {
806 FunctionDecl *InstFD = ReadDeclAs<FunctionDecl>();
807 TemplateSpecializationKind TSK =
808 (TemplateSpecializationKind)Record.readInt();
809 SourceLocation POI = ReadSourceLocation();
810 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
811 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
812 mergeRedeclarable(FD, Redecl);
815 case FunctionDecl::TK_FunctionTemplateSpecialization: {
816 FunctionTemplateDecl *Template = ReadDeclAs<FunctionTemplateDecl>();
817 TemplateSpecializationKind TSK =
818 (TemplateSpecializationKind)Record.readInt();
820 // Template arguments.
821 SmallVector<TemplateArgument, 8> TemplArgs;
822 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
824 // Template args as written.
825 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
826 SourceLocation LAngleLoc, RAngleLoc;
827 bool HasTemplateArgumentsAsWritten = Record.readInt();
828 if (HasTemplateArgumentsAsWritten) {
829 unsigned NumTemplateArgLocs = Record.readInt();
830 TemplArgLocs.reserve(NumTemplateArgLocs);
831 for (unsigned i=0; i != NumTemplateArgLocs; ++i)
832 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
834 LAngleLoc = ReadSourceLocation();
835 RAngleLoc = ReadSourceLocation();
838 SourceLocation POI = ReadSourceLocation();
840 ASTContext &C = Reader.getContext();
841 TemplateArgumentList *TemplArgList
842 = TemplateArgumentList::CreateCopy(C, TemplArgs);
843 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
844 for (unsigned i=0, e = TemplArgLocs.size(); i != e; ++i)
845 TemplArgsInfo.addArgument(TemplArgLocs[i]);
846 FunctionTemplateSpecializationInfo *FTInfo
847 = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
849 HasTemplateArgumentsAsWritten ? &TemplArgsInfo
852 FD->TemplateOrSpecialization = FTInfo;
854 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
855 // The template that contains the specializations set. It's not safe to
856 // use getCanonicalDecl on Template since it may still be initializing.
857 FunctionTemplateDecl *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
858 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
859 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
860 // FunctionTemplateSpecializationInfo's Profile().
861 // We avoid getASTContext because a decl in the parent hierarchy may
863 llvm::FoldingSetNodeID ID;
864 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
865 void *InsertPos = nullptr;
866 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
867 FunctionTemplateSpecializationInfo *ExistingInfo =
868 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
870 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
872 assert(Reader.getContext().getLangOpts().Modules &&
873 "already deserialized this template specialization");
874 mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
879 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
881 UnresolvedSet<8> TemplDecls;
882 unsigned NumTemplates = Record.readInt();
883 while (NumTemplates--)
884 TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
887 TemplateArgumentListInfo TemplArgs;
888 unsigned NumArgs = Record.readInt();
890 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
891 TemplArgs.setLAngleLoc(ReadSourceLocation());
892 TemplArgs.setRAngleLoc(ReadSourceLocation());
894 FD->setDependentTemplateSpecialization(Reader.getContext(),
895 TemplDecls, TemplArgs);
896 // These are not merged; we don't need to merge redeclarations of dependent
902 // Read in the parameters.
903 unsigned NumParams = Record.readInt();
904 SmallVector<ParmVarDecl *, 16> Params;
905 Params.reserve(NumParams);
906 for (unsigned I = 0; I != NumParams; ++I)
907 Params.push_back(ReadDeclAs<ParmVarDecl>());
908 FD->setParams(Reader.getContext(), Params);
911 void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
913 if (Record.readInt()) {
914 // Load the body on-demand. Most clients won't care, because method
915 // definitions rarely show up in headers.
916 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
917 HasPendingBody = true;
918 MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
919 MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
921 MD->setInstanceMethod(Record.readInt());
922 MD->setVariadic(Record.readInt());
923 MD->setPropertyAccessor(Record.readInt());
924 MD->setDefined(Record.readInt());
925 MD->IsOverriding = Record.readInt();
926 MD->HasSkippedBody = Record.readInt();
928 MD->IsRedeclaration = Record.readInt();
929 MD->HasRedeclaration = Record.readInt();
930 if (MD->HasRedeclaration)
931 Reader.getContext().setObjCMethodRedeclaration(MD,
932 ReadDeclAs<ObjCMethodDecl>());
934 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
935 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
936 MD->SetRelatedResultType(Record.readInt());
937 MD->setReturnType(Record.readType());
938 MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
939 MD->DeclEndLoc = ReadSourceLocation();
940 unsigned NumParams = Record.readInt();
941 SmallVector<ParmVarDecl *, 16> Params;
942 Params.reserve(NumParams);
943 for (unsigned I = 0; I != NumParams; ++I)
944 Params.push_back(ReadDeclAs<ParmVarDecl>());
946 MD->SelLocsKind = Record.readInt();
947 unsigned NumStoredSelLocs = Record.readInt();
948 SmallVector<SourceLocation, 16> SelLocs;
949 SelLocs.reserve(NumStoredSelLocs);
950 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
951 SelLocs.push_back(ReadSourceLocation());
953 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
956 void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
957 VisitTypedefNameDecl(D);
959 D->Variance = Record.readInt();
960 D->Index = Record.readInt();
961 D->VarianceLoc = ReadSourceLocation();
962 D->ColonLoc = ReadSourceLocation();
965 void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
967 CD->setAtStartLoc(ReadSourceLocation());
968 CD->setAtEndRange(ReadSourceRange());
971 ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
972 unsigned numParams = Record.readInt();
976 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
977 typeParams.reserve(numParams);
978 for (unsigned i = 0; i != numParams; ++i) {
979 auto typeParam = ReadDeclAs<ObjCTypeParamDecl>();
983 typeParams.push_back(typeParam);
986 SourceLocation lAngleLoc = ReadSourceLocation();
987 SourceLocation rAngleLoc = ReadSourceLocation();
989 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
990 typeParams, rAngleLoc);
993 void ASTDeclReader::ReadObjCDefinitionData(
994 struct ObjCInterfaceDecl::DefinitionData &Data) {
995 // Read the superclass.
996 Data.SuperClassTInfo = GetTypeSourceInfo();
998 Data.EndLoc = ReadSourceLocation();
999 Data.HasDesignatedInitializers = Record.readInt();
1001 // Read the directly referenced protocols and their SourceLocations.
1002 unsigned NumProtocols = Record.readInt();
1003 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1004 Protocols.reserve(NumProtocols);
1005 for (unsigned I = 0; I != NumProtocols; ++I)
1006 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1007 SmallVector<SourceLocation, 16> ProtoLocs;
1008 ProtoLocs.reserve(NumProtocols);
1009 for (unsigned I = 0; I != NumProtocols; ++I)
1010 ProtoLocs.push_back(ReadSourceLocation());
1011 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1012 Reader.getContext());
1014 // Read the transitive closure of protocols referenced by this class.
1015 NumProtocols = Record.readInt();
1017 Protocols.reserve(NumProtocols);
1018 for (unsigned I = 0; I != NumProtocols; ++I)
1019 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1020 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1021 Reader.getContext());
1024 void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1025 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1026 // FIXME: odr checking?
1029 void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1030 RedeclarableResult Redecl = VisitRedeclarable(ID);
1031 VisitObjCContainerDecl(ID);
1032 TypeIDForTypeDecl = Record.getGlobalTypeID(Record.readInt());
1033 mergeRedeclarable(ID, Redecl);
1035 ID->TypeParamList = ReadObjCTypeParamList();
1036 if (Record.readInt()) {
1037 // Read the definition.
1038 ID->allocateDefinitionData();
1040 ReadObjCDefinitionData(ID->data());
1041 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1042 if (Canon->Data.getPointer()) {
1043 // If we already have a definition, keep the definition invariant and
1045 MergeDefinitionData(Canon, std::move(ID->data()));
1046 ID->Data = Canon->Data;
1048 // Set the definition data of the canonical declaration, so other
1049 // redeclarations will see it.
1050 ID->getCanonicalDecl()->Data = ID->Data;
1052 // We will rebuild this list lazily.
1053 ID->setIvarList(nullptr);
1056 // Note that we have deserialized a definition.
1057 Reader.PendingDefinitions.insert(ID);
1059 // Note that we've loaded this Objective-C class.
1060 Reader.ObjCClassesLoaded.push_back(ID);
1062 ID->Data = ID->getCanonicalDecl()->Data;
1066 void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1067 VisitFieldDecl(IVD);
1068 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1069 // This field will be built lazily.
1070 IVD->setNextIvar(nullptr);
1071 bool synth = Record.readInt();
1072 IVD->setSynthesize(synth);
1075 void ASTDeclReader::ReadObjCDefinitionData(
1076 struct ObjCProtocolDecl::DefinitionData &Data) {
1078 unsigned NumProtoRefs = Record.readInt();
1079 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1080 ProtoRefs.reserve(NumProtoRefs);
1081 for (unsigned I = 0; I != NumProtoRefs; ++I)
1082 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1083 SmallVector<SourceLocation, 16> ProtoLocs;
1084 ProtoLocs.reserve(NumProtoRefs);
1085 for (unsigned I = 0; I != NumProtoRefs; ++I)
1086 ProtoLocs.push_back(ReadSourceLocation());
1087 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1088 ProtoLocs.data(), Reader.getContext());
1091 void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1092 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1093 // FIXME: odr checking?
1096 void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1097 RedeclarableResult Redecl = VisitRedeclarable(PD);
1098 VisitObjCContainerDecl(PD);
1099 mergeRedeclarable(PD, Redecl);
1101 if (Record.readInt()) {
1102 // Read the definition.
1103 PD->allocateDefinitionData();
1105 ReadObjCDefinitionData(PD->data());
1107 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1108 if (Canon->Data.getPointer()) {
1109 // If we already have a definition, keep the definition invariant and
1111 MergeDefinitionData(Canon, std::move(PD->data()));
1112 PD->Data = Canon->Data;
1114 // Set the definition data of the canonical declaration, so other
1115 // redeclarations will see it.
1116 PD->getCanonicalDecl()->Data = PD->Data;
1118 // Note that we have deserialized a definition.
1119 Reader.PendingDefinitions.insert(PD);
1121 PD->Data = PD->getCanonicalDecl()->Data;
1125 void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1129 void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1130 VisitObjCContainerDecl(CD);
1131 CD->setCategoryNameLoc(ReadSourceLocation());
1132 CD->setIvarLBraceLoc(ReadSourceLocation());
1133 CD->setIvarRBraceLoc(ReadSourceLocation());
1135 // Note that this category has been deserialized. We do this before
1136 // deserializing the interface declaration, so that it will consider this
1138 Reader.CategoriesDeserialized.insert(CD);
1140 CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1141 CD->TypeParamList = ReadObjCTypeParamList();
1142 unsigned NumProtoRefs = Record.readInt();
1143 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1144 ProtoRefs.reserve(NumProtoRefs);
1145 for (unsigned I = 0; I != NumProtoRefs; ++I)
1146 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1147 SmallVector<SourceLocation, 16> ProtoLocs;
1148 ProtoLocs.reserve(NumProtoRefs);
1149 for (unsigned I = 0; I != NumProtoRefs; ++I)
1150 ProtoLocs.push_back(ReadSourceLocation());
1151 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1152 Reader.getContext());
1155 void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1156 VisitNamedDecl(CAD);
1157 CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1160 void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1162 D->setAtLoc(ReadSourceLocation());
1163 D->setLParenLoc(ReadSourceLocation());
1164 QualType T = Record.readType();
1165 TypeSourceInfo *TSI = GetTypeSourceInfo();
1167 D->setPropertyAttributes(
1168 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1169 D->setPropertyAttributesAsWritten(
1170 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1171 D->setPropertyImplementation(
1172 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1173 DeclarationName GetterName = Record.readDeclarationName();
1174 SourceLocation GetterLoc = ReadSourceLocation();
1175 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1176 DeclarationName SetterName = Record.readDeclarationName();
1177 SourceLocation SetterLoc = ReadSourceLocation();
1178 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1179 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1180 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1181 D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1184 void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1185 VisitObjCContainerDecl(D);
1186 D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1189 void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1190 VisitObjCImplDecl(D);
1191 D->CategoryNameLoc = ReadSourceLocation();
1194 void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1195 VisitObjCImplDecl(D);
1196 D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1197 D->SuperLoc = ReadSourceLocation();
1198 D->setIvarLBraceLoc(ReadSourceLocation());
1199 D->setIvarRBraceLoc(ReadSourceLocation());
1200 D->setHasNonZeroConstructors(Record.readInt());
1201 D->setHasDestructors(Record.readInt());
1202 D->NumIvarInitializers = Record.readInt();
1203 if (D->NumIvarInitializers)
1204 D->IvarInitializers = ReadGlobalOffset();
1207 void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1209 D->setAtLoc(ReadSourceLocation());
1210 D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1211 D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1212 D->IvarLoc = ReadSourceLocation();
1213 D->setGetterCXXConstructor(Record.readExpr());
1214 D->setSetterCXXAssignment(Record.readExpr());
1217 void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1218 VisitDeclaratorDecl(FD);
1219 FD->Mutable = Record.readInt();
1220 if (int BitWidthOrInitializer = Record.readInt()) {
1221 FD->InitStorage.setInt(
1222 static_cast<FieldDecl::InitStorageKind>(BitWidthOrInitializer - 1));
1223 if (FD->InitStorage.getInt() == FieldDecl::ISK_CapturedVLAType) {
1224 // Read captured variable length array.
1225 FD->InitStorage.setPointer(Record.readType().getAsOpaquePtr());
1227 FD->InitStorage.setPointer(Record.readExpr());
1230 if (!FD->getDeclName()) {
1231 if (FieldDecl *Tmpl = ReadDeclAs<FieldDecl>())
1232 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1237 void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1238 VisitDeclaratorDecl(PD);
1239 PD->GetterId = Record.getIdentifierInfo();
1240 PD->SetterId = Record.getIdentifierInfo();
1243 void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1246 FD->ChainingSize = Record.readInt();
1247 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1248 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1250 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1251 FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1256 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1257 RedeclarableResult Redecl = VisitRedeclarable(VD);
1258 VisitDeclaratorDecl(VD);
1260 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1261 VD->VarDeclBits.TSCSpec = Record.readInt();
1262 VD->VarDeclBits.InitStyle = Record.readInt();
1263 if (!isa<ParmVarDecl>(VD)) {
1264 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1266 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1267 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1268 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1269 VD->NonParmVarDeclBits.ARCPseudoStrong = Record.readInt();
1270 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1271 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1272 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1273 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1274 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1275 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1277 Linkage VarLinkage = Linkage(Record.readInt());
1278 VD->setCachedLinkage(VarLinkage);
1280 // Reconstruct the one piece of the IdentifierNamespace that we need.
1281 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1282 VD->getLexicalDeclContext()->isFunctionOrMethod())
1283 VD->setLocalExternDecl();
1285 if (uint64_t Val = Record.readInt()) {
1286 VD->setInit(Record.readExpr());
1287 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1288 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1289 Eval->CheckedICE = true;
1290 Eval->IsICE = Val == 3;
1295 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1297 switch ((VarKind)Record.readInt()) {
1298 case VarNotTemplate:
1299 // Only true variables (not parameters or implicit parameters) can be
1300 // merged; the other kinds are not really redeclarable at all.
1301 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1302 !isa<VarTemplateSpecializationDecl>(VD))
1303 mergeRedeclarable(VD, Redecl);
1306 // Merged when we merge the template.
1307 VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1309 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1310 VarDecl *Tmpl = ReadDeclAs<VarDecl>();
1311 TemplateSpecializationKind TSK =
1312 (TemplateSpecializationKind)Record.readInt();
1313 SourceLocation POI = ReadSourceLocation();
1314 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1315 mergeRedeclarable(VD, Redecl);
1323 void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1327 void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1329 unsigned isObjCMethodParam = Record.readInt();
1330 unsigned scopeDepth = Record.readInt();
1331 unsigned scopeIndex = Record.readInt();
1332 unsigned declQualifier = Record.readInt();
1333 if (isObjCMethodParam) {
1334 assert(scopeDepth == 0);
1335 PD->setObjCMethodScopeInfo(scopeIndex);
1336 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1338 PD->setScopeInfo(scopeDepth, scopeIndex);
1340 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1341 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1342 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1343 PD->setUninstantiatedDefaultArg(Record.readExpr());
1345 // FIXME: If this is a redeclaration of a function from another module, handle
1346 // inheritance of default arguments.
1349 void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1351 BindingDecl **BDs = DD->getTrailingObjects<BindingDecl*>();
1352 for (unsigned I = 0; I != DD->NumBindings; ++I)
1353 BDs[I] = ReadDeclAs<BindingDecl>();
1356 void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1358 BD->Binding = Record.readExpr();
1361 void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1363 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1364 AD->setRParenLoc(ReadSourceLocation());
1367 void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1369 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1370 BD->setSignatureAsWritten(GetTypeSourceInfo());
1371 unsigned NumParams = Record.readInt();
1372 SmallVector<ParmVarDecl *, 16> Params;
1373 Params.reserve(NumParams);
1374 for (unsigned I = 0; I != NumParams; ++I)
1375 Params.push_back(ReadDeclAs<ParmVarDecl>());
1376 BD->setParams(Params);
1378 BD->setIsVariadic(Record.readInt());
1379 BD->setBlockMissingReturnType(Record.readInt());
1380 BD->setIsConversionFromLambda(Record.readInt());
1382 bool capturesCXXThis = Record.readInt();
1383 unsigned numCaptures = Record.readInt();
1384 SmallVector<BlockDecl::Capture, 16> captures;
1385 captures.reserve(numCaptures);
1386 for (unsigned i = 0; i != numCaptures; ++i) {
1387 VarDecl *decl = ReadDeclAs<VarDecl>();
1388 unsigned flags = Record.readInt();
1389 bool byRef = (flags & 1);
1390 bool nested = (flags & 2);
1391 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1393 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1395 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1398 void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1400 unsigned ContextParamPos = Record.readInt();
1401 CD->setNothrow(Record.readInt() != 0);
1402 // Body is set by VisitCapturedStmt.
1403 for (unsigned I = 0; I < CD->NumParams; ++I) {
1404 if (I != ContextParamPos)
1405 CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1407 CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1411 void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1413 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1414 D->setExternLoc(ReadSourceLocation());
1415 D->setRBraceLoc(ReadSourceLocation());
1418 void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1420 D->RBraceLoc = ReadSourceLocation();
1423 void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1425 D->setLocStart(ReadSourceLocation());
1428 void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1429 RedeclarableResult Redecl = VisitRedeclarable(D);
1431 D->setInline(Record.readInt());
1432 D->LocStart = ReadSourceLocation();
1433 D->RBraceLoc = ReadSourceLocation();
1435 // Defer loading the anonymous namespace until we've finished merging
1436 // this namespace; loading it might load a later declaration of the
1437 // same namespace, and we have an invariant that older declarations
1438 // get merged before newer ones try to merge.
1439 GlobalDeclID AnonNamespace = 0;
1440 if (Redecl.getFirstID() == ThisDeclID) {
1441 AnonNamespace = ReadDeclID();
1443 // Link this namespace back to the first declaration, which has already
1444 // been deserialized.
1445 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1448 mergeRedeclarable(D, Redecl);
1450 if (AnonNamespace) {
1451 // Each module has its own anonymous namespace, which is disjoint from
1452 // any other module's anonymous namespaces, so don't attach the anonymous
1453 // namespace at all.
1454 NamespaceDecl *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1455 if (!Record.isModule())
1456 D->setAnonymousNamespace(Anon);
1460 void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1461 RedeclarableResult Redecl = VisitRedeclarable(D);
1463 D->NamespaceLoc = ReadSourceLocation();
1464 D->IdentLoc = ReadSourceLocation();
1465 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1466 D->Namespace = ReadDeclAs<NamedDecl>();
1467 mergeRedeclarable(D, Redecl);
1470 void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1472 D->setUsingLoc(ReadSourceLocation());
1473 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1474 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1475 D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1476 D->setTypename(Record.readInt());
1477 if (NamedDecl *Pattern = ReadDeclAs<NamedDecl>())
1478 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1482 void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1484 D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1485 NamedDecl **Expansions = D->getTrailingObjects<NamedDecl*>();
1486 for (unsigned I = 0; I != D->NumExpansions; ++I)
1487 Expansions[I] = ReadDeclAs<NamedDecl>();
1491 void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1492 RedeclarableResult Redecl = VisitRedeclarable(D);
1494 D->setTargetDecl(ReadDeclAs<NamedDecl>());
1495 D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1496 UsingShadowDecl *Pattern = ReadDeclAs<UsingShadowDecl>();
1498 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1499 mergeRedeclarable(D, Redecl);
1502 void ASTDeclReader::VisitConstructorUsingShadowDecl(
1503 ConstructorUsingShadowDecl *D) {
1504 VisitUsingShadowDecl(D);
1505 D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1506 D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1507 D->IsVirtual = Record.readInt();
1510 void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1512 D->UsingLoc = ReadSourceLocation();
1513 D->NamespaceLoc = ReadSourceLocation();
1514 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1515 D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1516 D->CommonAncestor = ReadDeclAs<DeclContext>();
1519 void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1521 D->setUsingLoc(ReadSourceLocation());
1522 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1523 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1524 D->EllipsisLoc = ReadSourceLocation();
1528 void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1529 UnresolvedUsingTypenameDecl *D) {
1531 D->TypenameLocation = ReadSourceLocation();
1532 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1533 D->EllipsisLoc = ReadSourceLocation();
1537 void ASTDeclReader::ReadCXXDefinitionData(
1538 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1539 // Note: the caller has deserialized the IsLambda bit already.
1540 Data.UserDeclaredConstructor = Record.readInt();
1541 Data.UserDeclaredSpecialMembers = Record.readInt();
1542 Data.Aggregate = Record.readInt();
1543 Data.PlainOldData = Record.readInt();
1544 Data.Empty = Record.readInt();
1545 Data.Polymorphic = Record.readInt();
1546 Data.Abstract = Record.readInt();
1547 Data.IsStandardLayout = Record.readInt();
1548 Data.HasNoNonEmptyBases = Record.readInt();
1549 Data.HasPrivateFields = Record.readInt();
1550 Data.HasProtectedFields = Record.readInt();
1551 Data.HasPublicFields = Record.readInt();
1552 Data.HasMutableFields = Record.readInt();
1553 Data.HasVariantMembers = Record.readInt();
1554 Data.HasOnlyCMembers = Record.readInt();
1555 Data.HasInClassInitializer = Record.readInt();
1556 Data.HasUninitializedReferenceMember = Record.readInt();
1557 Data.HasUninitializedFields = Record.readInt();
1558 Data.HasInheritedConstructor = Record.readInt();
1559 Data.HasInheritedAssignment = Record.readInt();
1560 Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1561 Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1562 Data.NeedOverloadResolutionForDestructor = Record.readInt();
1563 Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1564 Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1565 Data.DefaultedDestructorIsDeleted = Record.readInt();
1566 Data.HasTrivialSpecialMembers = Record.readInt();
1567 Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1568 Data.HasIrrelevantDestructor = Record.readInt();
1569 Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1570 Data.HasDefaultedDefaultConstructor = Record.readInt();
1571 Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1572 Data.HasConstexprDefaultConstructor = Record.readInt();
1573 Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1574 Data.ComputedVisibleConversions = Record.readInt();
1575 Data.UserProvidedDefaultConstructor = Record.readInt();
1576 Data.DeclaredSpecialMembers = Record.readInt();
1577 Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1578 Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1579 Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1580 Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1581 Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1582 Data.ODRHash = Record.readInt();
1583 Data.HasODRHash = true;
1585 if (Record.readInt()) {
1586 Reader.BodySource[D] = Loc.F->Kind == ModuleKind::MK_MainFile
1587 ? ExternalASTSource::EK_Never
1588 : ExternalASTSource::EK_Always;
1591 Data.NumBases = Record.readInt();
1593 Data.Bases = ReadGlobalOffset();
1594 Data.NumVBases = Record.readInt();
1596 Data.VBases = ReadGlobalOffset();
1598 Record.readUnresolvedSet(Data.Conversions);
1599 Record.readUnresolvedSet(Data.VisibleConversions);
1600 assert(Data.Definition && "Data.Definition should be already set!");
1601 Data.FirstFriend = ReadDeclID();
1603 if (Data.IsLambda) {
1604 typedef LambdaCapture Capture;
1605 CXXRecordDecl::LambdaDefinitionData &Lambda
1606 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1607 Lambda.Dependent = Record.readInt();
1608 Lambda.IsGenericLambda = Record.readInt();
1609 Lambda.CaptureDefault = Record.readInt();
1610 Lambda.NumCaptures = Record.readInt();
1611 Lambda.NumExplicitCaptures = Record.readInt();
1612 Lambda.ManglingNumber = Record.readInt();
1613 Lambda.ContextDecl = ReadDeclID();
1614 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1615 sizeof(Capture) * Lambda.NumCaptures);
1616 Capture *ToCapture = Lambda.Captures;
1617 Lambda.MethodTyInfo = GetTypeSourceInfo();
1618 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1619 SourceLocation Loc = ReadSourceLocation();
1620 bool IsImplicit = Record.readInt();
1621 LambdaCaptureKind Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1626 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1630 VarDecl *Var = ReadDeclAs<VarDecl>();
1631 SourceLocation EllipsisLoc = ReadSourceLocation();
1632 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1639 void ASTDeclReader::MergeDefinitionData(
1640 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1641 assert(D->DefinitionData &&
1642 "merging class definition into non-definition");
1643 auto &DD = *D->DefinitionData;
1645 if (DD.Definition != MergeDD.Definition) {
1646 // Track that we merged the definitions.
1647 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1649 Reader.PendingDefinitions.erase(MergeDD.Definition);
1650 MergeDD.Definition->IsCompleteDefinition = false;
1651 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1652 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1653 "already loaded pending lookups for merged definition");
1656 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1657 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1658 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1659 // We faked up this definition data because we found a class for which we'd
1660 // not yet loaded the definition. Replace it with the real thing now.
1661 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1662 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1664 // Don't change which declaration is the definition; that is required
1665 // to be invariant once we select it.
1666 auto *Def = DD.Definition;
1667 DD = std::move(MergeDD);
1668 DD.Definition = Def;
1672 // FIXME: Move this out into a .def file?
1673 bool DetectedOdrViolation = false;
1674 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1675 #define MATCH_FIELD(Field) \
1676 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1678 MATCH_FIELD(UserDeclaredConstructor)
1679 MATCH_FIELD(UserDeclaredSpecialMembers)
1680 MATCH_FIELD(Aggregate)
1681 MATCH_FIELD(PlainOldData)
1683 MATCH_FIELD(Polymorphic)
1684 MATCH_FIELD(Abstract)
1685 MATCH_FIELD(IsStandardLayout)
1686 MATCH_FIELD(HasNoNonEmptyBases)
1687 MATCH_FIELD(HasPrivateFields)
1688 MATCH_FIELD(HasProtectedFields)
1689 MATCH_FIELD(HasPublicFields)
1690 MATCH_FIELD(HasMutableFields)
1691 MATCH_FIELD(HasVariantMembers)
1692 MATCH_FIELD(HasOnlyCMembers)
1693 MATCH_FIELD(HasInClassInitializer)
1694 MATCH_FIELD(HasUninitializedReferenceMember)
1695 MATCH_FIELD(HasUninitializedFields)
1696 MATCH_FIELD(HasInheritedConstructor)
1697 MATCH_FIELD(HasInheritedAssignment)
1698 MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1699 MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1700 MATCH_FIELD(NeedOverloadResolutionForDestructor)
1701 MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1702 MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1703 MATCH_FIELD(DefaultedDestructorIsDeleted)
1704 OR_FIELD(HasTrivialSpecialMembers)
1705 OR_FIELD(DeclaredNonTrivialSpecialMembers)
1706 MATCH_FIELD(HasIrrelevantDestructor)
1707 OR_FIELD(HasConstexprNonCopyMoveConstructor)
1708 OR_FIELD(HasDefaultedDefaultConstructor)
1709 MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1710 OR_FIELD(HasConstexprDefaultConstructor)
1711 MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1712 // ComputedVisibleConversions is handled below.
1713 MATCH_FIELD(UserProvidedDefaultConstructor)
1714 OR_FIELD(DeclaredSpecialMembers)
1715 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1716 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1717 MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1718 OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1719 OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1720 MATCH_FIELD(IsLambda)
1724 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1725 DetectedOdrViolation = true;
1726 // FIXME: Issue a diagnostic if the base classes don't match when we come
1727 // to lazily load them.
1729 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1730 // match when we come to lazily load them.
1731 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1732 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1733 DD.ComputedVisibleConversions = true;
1736 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1740 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1741 // when they occur within the body of a function template specialization).
1744 if (D->getODRHash() != MergeDD.ODRHash) {
1745 DetectedOdrViolation = true;
1748 if (DetectedOdrViolation)
1749 Reader.PendingOdrMergeFailures[DD.Definition].push_back(MergeDD.Definition);
1752 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1753 struct CXXRecordDecl::DefinitionData *DD;
1754 ASTContext &C = Reader.getContext();
1756 // Determine whether this is a lambda closure type, so that we can
1757 // allocate the appropriate DefinitionData structure.
1758 bool IsLambda = Record.readInt();
1760 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1763 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1765 ReadCXXDefinitionData(*DD, D);
1767 // We might already have a definition for this record. This can happen either
1768 // because we're reading an update record, or because we've already done some
1769 // merging. Either way, just merge into it.
1770 CXXRecordDecl *Canon = D->getCanonicalDecl();
1771 if (Canon->DefinitionData) {
1772 MergeDefinitionData(Canon, std::move(*DD));
1773 D->DefinitionData = Canon->DefinitionData;
1777 // Mark this declaration as being a definition.
1778 D->IsCompleteDefinition = true;
1779 D->DefinitionData = DD;
1781 // If this is not the first declaration or is an update record, we can have
1782 // other redeclarations already. Make a note that we need to propagate the
1783 // DefinitionData pointer onto them.
1784 if (Update || Canon != D) {
1785 Canon->DefinitionData = D->DefinitionData;
1786 Reader.PendingDefinitions.insert(D);
1790 ASTDeclReader::RedeclarableResult
1791 ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1792 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1794 ASTContext &C = Reader.getContext();
1797 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1799 switch ((CXXRecKind)Record.readInt()) {
1800 case CXXRecNotTemplate:
1801 // Merged when we merge the folding set entry in the primary template.
1802 if (!isa<ClassTemplateSpecializationDecl>(D))
1803 mergeRedeclarable(D, Redecl);
1805 case CXXRecTemplate: {
1806 // Merged when we merge the template.
1807 ClassTemplateDecl *Template = ReadDeclAs<ClassTemplateDecl>();
1808 D->TemplateOrInstantiation = Template;
1809 if (!Template->getTemplatedDecl()) {
1810 // We've not actually loaded the ClassTemplateDecl yet, because we're
1811 // currently being loaded as its pattern. Rely on it to set up our
1812 // TypeForDecl (see VisitClassTemplateDecl).
1814 // Beware: we do not yet know our canonical declaration, and may still
1815 // get merged once the surrounding class template has got off the ground.
1816 TypeIDForTypeDecl = 0;
1820 case CXXRecMemberSpecialization: {
1821 CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>();
1822 TemplateSpecializationKind TSK =
1823 (TemplateSpecializationKind)Record.readInt();
1824 SourceLocation POI = ReadSourceLocation();
1825 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1826 MSI->setPointOfInstantiation(POI);
1827 D->TemplateOrInstantiation = MSI;
1828 mergeRedeclarable(D, Redecl);
1833 bool WasDefinition = Record.readInt();
1835 ReadCXXRecordDefinition(D, /*Update*/false);
1837 // Propagate DefinitionData pointer from the canonical declaration.
1838 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1840 // Lazily load the key function to avoid deserializing every method so we can
1842 if (WasDefinition) {
1843 DeclID KeyFn = ReadDeclID();
1844 if (KeyFn && D->IsCompleteDefinition)
1845 // FIXME: This is wrong for the ARM ABI, where some other module may have
1846 // made this function no longer be a key function. We need an update
1847 // record or similar for that case.
1848 C.KeyFunctions[D] = KeyFn;
1854 void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1855 VisitFunctionDecl(D);
1858 void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1859 VisitFunctionDecl(D);
1861 unsigned NumOverridenMethods = Record.readInt();
1862 if (D->isCanonicalDecl()) {
1863 while (NumOverridenMethods--) {
1864 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1865 // MD may be initializing.
1866 if (CXXMethodDecl *MD = ReadDeclAs<CXXMethodDecl>())
1867 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1870 // We don't care about which declarations this used to override; we get
1871 // the relevant information from the canonical declaration.
1872 Record.skipInts(NumOverridenMethods);
1876 void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1877 // We need the inherited constructor information to merge the declaration,
1878 // so we have to read it before we call VisitCXXMethodDecl.
1879 if (D->isInheritingConstructor()) {
1880 auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1881 auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1882 *D->getTrailingObjects<InheritedConstructor>() =
1883 InheritedConstructor(Shadow, Ctor);
1886 VisitCXXMethodDecl(D);
1889 void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1890 VisitCXXMethodDecl(D);
1892 if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
1893 auto *Canon = cast<CXXDestructorDecl>(D->getCanonicalDecl());
1894 // FIXME: Check consistency if we have an old and new operator delete.
1895 if (!Canon->OperatorDelete)
1896 Canon->OperatorDelete = OperatorDelete;
1900 void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1901 VisitCXXMethodDecl(D);
1904 void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1906 D->ImportedAndComplete.setPointer(readModule());
1907 D->ImportedAndComplete.setInt(Record.readInt());
1908 SourceLocation *StoredLocs = D->getTrailingObjects<SourceLocation>();
1909 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1910 StoredLocs[I] = ReadSourceLocation();
1911 Record.skipInts(1); // The number of stored source locations.
1914 void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1916 D->setColonLoc(ReadSourceLocation());
1919 void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1921 if (Record.readInt()) // hasFriendDecl
1922 D->Friend = ReadDeclAs<NamedDecl>();
1924 D->Friend = GetTypeSourceInfo();
1925 for (unsigned i = 0; i != D->NumTPLists; ++i)
1926 D->getTrailingObjects<TemplateParameterList *>()[i] =
1927 Record.readTemplateParameterList();
1928 D->NextFriend = ReadDeclID();
1929 D->UnsupportedFriend = (Record.readInt() != 0);
1930 D->FriendLoc = ReadSourceLocation();
1933 void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1935 unsigned NumParams = Record.readInt();
1936 D->NumParams = NumParams;
1937 D->Params = new TemplateParameterList*[NumParams];
1938 for (unsigned i = 0; i != NumParams; ++i)
1939 D->Params[i] = Record.readTemplateParameterList();
1940 if (Record.readInt()) // HasFriendDecl
1941 D->Friend = ReadDeclAs<NamedDecl>();
1943 D->Friend = GetTypeSourceInfo();
1944 D->FriendLoc = ReadSourceLocation();
1947 DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
1950 DeclID PatternID = ReadDeclID();
1951 NamedDecl *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
1952 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
1953 // FIXME handle associated constraints
1954 D->init(TemplatedDecl, TemplateParams);
1959 ASTDeclReader::RedeclarableResult
1960 ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1961 RedeclarableResult Redecl = VisitRedeclarable(D);
1963 // Make sure we've allocated the Common pointer first. We do this before
1964 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
1965 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
1966 if (!CanonD->Common) {
1967 CanonD->Common = CanonD->newCommon(Reader.getContext());
1968 Reader.PendingDefinitions.insert(CanonD);
1970 D->Common = CanonD->Common;
1972 // If this is the first declaration of the template, fill in the information
1973 // for the 'common' pointer.
1974 if (ThisDeclID == Redecl.getFirstID()) {
1975 if (RedeclarableTemplateDecl *RTD
1976 = ReadDeclAs<RedeclarableTemplateDecl>()) {
1977 assert(RTD->getKind() == D->getKind() &&
1978 "InstantiatedFromMemberTemplate kind mismatch");
1979 D->setInstantiatedFromMemberTemplate(RTD);
1980 if (Record.readInt())
1981 D->setMemberSpecialization();
1985 DeclID PatternID = VisitTemplateDecl(D);
1986 D->IdentifierNamespace = Record.readInt();
1988 mergeRedeclarable(D, Redecl, PatternID);
1990 // If we merged the template with a prior declaration chain, merge the common
1992 // FIXME: Actually merge here, don't just overwrite.
1993 D->Common = D->getCanonicalDecl()->Common;
1998 void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1999 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2001 if (ThisDeclID == Redecl.getFirstID()) {
2002 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2003 // the specializations.
2004 SmallVector<serialization::DeclID, 32> SpecIDs;
2005 ReadDeclIDList(SpecIDs);
2006 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2009 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2010 // We were loaded before our templated declaration was. We've not set up
2011 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2013 Reader.getContext().getInjectedClassNameType(
2014 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2018 void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2019 llvm_unreachable("BuiltinTemplates are not serialized");
2022 /// TODO: Unify with ClassTemplateDecl version?
2023 /// May require unifying ClassTemplateDecl and
2024 /// VarTemplateDecl beyond TemplateDecl...
2025 void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2026 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2028 if (ThisDeclID == Redecl.getFirstID()) {
2029 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2030 // the specializations.
2031 SmallVector<serialization::DeclID, 32> SpecIDs;
2032 ReadDeclIDList(SpecIDs);
2033 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2037 ASTDeclReader::RedeclarableResult
2038 ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2039 ClassTemplateSpecializationDecl *D) {
2040 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2042 ASTContext &C = Reader.getContext();
2043 if (Decl *InstD = ReadDecl()) {
2044 if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2045 D->SpecializedTemplate = CTD;
2047 SmallVector<TemplateArgument, 8> TemplArgs;
2048 Record.readTemplateArgumentList(TemplArgs);
2049 TemplateArgumentList *ArgList
2050 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2051 ClassTemplateSpecializationDecl::SpecializedPartialSpecialization *PS
2052 = new (C) ClassTemplateSpecializationDecl::
2053 SpecializedPartialSpecialization();
2054 PS->PartialSpecialization
2055 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2056 PS->TemplateArgs = ArgList;
2057 D->SpecializedTemplate = PS;
2061 SmallVector<TemplateArgument, 8> TemplArgs;
2062 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2063 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2064 D->PointOfInstantiation = ReadSourceLocation();
2065 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2067 bool writtenAsCanonicalDecl = Record.readInt();
2068 if (writtenAsCanonicalDecl) {
2069 ClassTemplateDecl *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2070 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2071 // Set this as, or find, the canonical declaration for this specialization
2072 ClassTemplateSpecializationDecl *CanonSpec;
2073 if (ClassTemplatePartialSpecializationDecl *Partial =
2074 dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2075 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2076 .GetOrInsertNode(Partial);
2079 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2081 // If there was already a canonical specialization, merge into it.
2082 if (CanonSpec != D) {
2083 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2085 // This declaration might be a definition. Merge with any existing
2087 if (auto *DDD = D->DefinitionData) {
2088 if (CanonSpec->DefinitionData)
2089 MergeDefinitionData(CanonSpec, std::move(*DDD));
2091 CanonSpec->DefinitionData = D->DefinitionData;
2093 D->DefinitionData = CanonSpec->DefinitionData;
2099 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2100 ClassTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo
2101 = new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2102 ExplicitInfo->TypeAsWritten = TyInfo;
2103 ExplicitInfo->ExternLoc = ReadSourceLocation();
2104 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2105 D->ExplicitInfo = ExplicitInfo;
2111 void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2112 ClassTemplatePartialSpecializationDecl *D) {
2113 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2115 D->TemplateParams = Record.readTemplateParameterList();
2116 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2118 // These are read/set from/to the first declaration.
2119 if (ThisDeclID == Redecl.getFirstID()) {
2120 D->InstantiatedFromMember.setPointer(
2121 ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2122 D->InstantiatedFromMember.setInt(Record.readInt());
2126 void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2127 ClassScopeFunctionSpecializationDecl *D) {
2129 D->Specialization = ReadDeclAs<CXXMethodDecl>();
2132 void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2133 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2135 if (ThisDeclID == Redecl.getFirstID()) {
2136 // This FunctionTemplateDecl owns a CommonPtr; read it.
2137 SmallVector<serialization::DeclID, 32> SpecIDs;
2138 ReadDeclIDList(SpecIDs);
2139 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2143 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2144 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2145 /// VarTemplate(Partial)SpecializationDecl with a new data
2146 /// structure Template(Partial)SpecializationDecl, and
2147 /// using Template(Partial)SpecializationDecl as input type.
2148 ASTDeclReader::RedeclarableResult
2149 ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2150 VarTemplateSpecializationDecl *D) {
2151 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2153 ASTContext &C = Reader.getContext();
2154 if (Decl *InstD = ReadDecl()) {
2155 if (VarTemplateDecl *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2156 D->SpecializedTemplate = VTD;
2158 SmallVector<TemplateArgument, 8> TemplArgs;
2159 Record.readTemplateArgumentList(TemplArgs);
2160 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2162 VarTemplateSpecializationDecl::SpecializedPartialSpecialization *PS =
2164 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2165 PS->PartialSpecialization =
2166 cast<VarTemplatePartialSpecializationDecl>(InstD);
2167 PS->TemplateArgs = ArgList;
2168 D->SpecializedTemplate = PS;
2173 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2174 VarTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo =
2175 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2176 ExplicitInfo->TypeAsWritten = TyInfo;
2177 ExplicitInfo->ExternLoc = ReadSourceLocation();
2178 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2179 D->ExplicitInfo = ExplicitInfo;
2182 SmallVector<TemplateArgument, 8> TemplArgs;
2183 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2184 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2185 D->PointOfInstantiation = ReadSourceLocation();
2186 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2188 bool writtenAsCanonicalDecl = Record.readInt();
2189 if (writtenAsCanonicalDecl) {
2190 VarTemplateDecl *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2191 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2192 // FIXME: If it's already present, merge it.
2193 if (VarTemplatePartialSpecializationDecl *Partial =
2194 dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2195 CanonPattern->getCommonPtr()->PartialSpecializations
2196 .GetOrInsertNode(Partial);
2198 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2206 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2207 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2208 /// VarTemplate(Partial)SpecializationDecl with a new data
2209 /// structure Template(Partial)SpecializationDecl, and
2210 /// using Template(Partial)SpecializationDecl as input type.
2211 void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2212 VarTemplatePartialSpecializationDecl *D) {
2213 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2215 D->TemplateParams = Record.readTemplateParameterList();
2216 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2218 // These are read/set from/to the first declaration.
2219 if (ThisDeclID == Redecl.getFirstID()) {
2220 D->InstantiatedFromMember.setPointer(
2221 ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2222 D->InstantiatedFromMember.setInt(Record.readInt());
2226 void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2229 D->setDeclaredWithTypename(Record.readInt());
2231 if (Record.readInt())
2232 D->setDefaultArgument(GetTypeSourceInfo());
2235 void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2236 VisitDeclaratorDecl(D);
2237 // TemplateParmPosition.
2238 D->setDepth(Record.readInt());
2239 D->setPosition(Record.readInt());
2240 if (D->isExpandedParameterPack()) {
2241 auto TypesAndInfos =
2242 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2243 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2244 new (&TypesAndInfos[I].first) QualType(Record.readType());
2245 TypesAndInfos[I].second = GetTypeSourceInfo();
2248 // Rest of NonTypeTemplateParmDecl.
2249 D->ParameterPack = Record.readInt();
2250 if (Record.readInt())
2251 D->setDefaultArgument(Record.readExpr());
2255 void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2256 VisitTemplateDecl(D);
2257 // TemplateParmPosition.
2258 D->setDepth(Record.readInt());
2259 D->setPosition(Record.readInt());
2260 if (D->isExpandedParameterPack()) {
2261 TemplateParameterList **Data =
2262 D->getTrailingObjects<TemplateParameterList *>();
2263 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2265 Data[I] = Record.readTemplateParameterList();
2267 // Rest of TemplateTemplateParmDecl.
2268 D->ParameterPack = Record.readInt();
2269 if (Record.readInt())
2270 D->setDefaultArgument(Reader.getContext(),
2271 Record.readTemplateArgumentLoc());
2275 void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2276 VisitRedeclarableTemplateDecl(D);
2279 void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2281 D->AssertExprAndFailed.setPointer(Record.readExpr());
2282 D->AssertExprAndFailed.setInt(Record.readInt());
2283 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2284 D->RParenLoc = ReadSourceLocation();
2287 void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2291 std::pair<uint64_t, uint64_t>
2292 ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2293 uint64_t LexicalOffset = ReadLocalOffset();
2294 uint64_t VisibleOffset = ReadLocalOffset();
2295 return std::make_pair(LexicalOffset, VisibleOffset);
2298 template <typename T>
2299 ASTDeclReader::RedeclarableResult
2300 ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2301 DeclID FirstDeclID = ReadDeclID();
2302 Decl *MergeWith = nullptr;
2304 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2305 bool IsFirstLocalDecl = false;
2307 uint64_t RedeclOffset = 0;
2309 // 0 indicates that this declaration was the only declaration of its entity,
2310 // and is used for space optimization.
2311 if (FirstDeclID == 0) {
2312 FirstDeclID = ThisDeclID;
2314 IsFirstLocalDecl = true;
2315 } else if (unsigned N = Record.readInt()) {
2316 // This declaration was the first local declaration, but may have imported
2317 // other declarations.
2319 IsFirstLocalDecl = true;
2321 // We have some declarations that must be before us in our redeclaration
2322 // chain. Read them now, and remember that we ought to merge with one of
2324 // FIXME: Provide a known merge target to the second and subsequent such
2326 for (unsigned I = 0; I != N - 1; ++I)
2327 MergeWith = ReadDecl();
2329 RedeclOffset = ReadLocalOffset();
2331 // This declaration was not the first local declaration. Read the first
2332 // local declaration now, to trigger the import of other redeclarations.
2336 T *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2337 if (FirstDecl != D) {
2338 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2339 // We temporarily set the first (canonical) declaration as the previous one
2340 // which is the one that matters and mark the real previous DeclID to be
2341 // loaded & attached later on.
2342 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2343 D->First = FirstDecl->getCanonicalDecl();
2346 T *DAsT = static_cast<T*>(D);
2348 // Note that we need to load local redeclarations of this decl and build a
2349 // decl chain for them. This must happen *after* we perform the preloading
2350 // above; this ensures that the redeclaration chain is built in the correct
2352 if (IsFirstLocalDecl)
2353 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2355 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2358 /// \brief Attempts to merge the given declaration (D) with another declaration
2359 /// of the same entity.
2360 template<typename T>
2361 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2362 RedeclarableResult &Redecl,
2363 DeclID TemplatePatternID) {
2364 // If modules are not available, there is no reason to perform this merge.
2365 if (!Reader.getContext().getLangOpts().Modules)
2368 // If we're not the canonical declaration, we don't need to merge.
2369 if (!DBase->isFirstDecl())
2372 T *D = static_cast<T*>(DBase);
2374 if (auto *Existing = Redecl.getKnownMergeTarget())
2375 // We already know of an existing declaration we should merge with.
2376 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2377 else if (FindExistingResult ExistingRes = findExisting(D))
2378 if (T *Existing = ExistingRes)
2379 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2382 /// \brief "Cast" to type T, asserting if we don't have an implicit conversion.
2383 /// We use this to put code in a template that will only be valid for certain
2385 template<typename T> static T assert_cast(T t) { return t; }
2386 template<typename T> static T assert_cast(...) {
2387 llvm_unreachable("bad assert_cast");
2390 /// \brief Merge together the pattern declarations from two template
2392 void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2393 RedeclarableTemplateDecl *Existing,
2394 DeclID DsID, bool IsKeyDecl) {
2395 auto *DPattern = D->getTemplatedDecl();
2396 auto *ExistingPattern = Existing->getTemplatedDecl();
2397 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2398 DPattern->getCanonicalDecl()->getGlobalID(),
2401 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2402 // Merge with any existing definition.
2403 // FIXME: This is duplicated in several places. Refactor.
2404 auto *ExistingClass =
2405 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2406 if (auto *DDD = DClass->DefinitionData) {
2407 if (ExistingClass->DefinitionData) {
2408 MergeDefinitionData(ExistingClass, std::move(*DDD));
2410 ExistingClass->DefinitionData = DClass->DefinitionData;
2411 // We may have skipped this before because we thought that DClass
2412 // was the canonical declaration.
2413 Reader.PendingDefinitions.insert(DClass);
2416 DClass->DefinitionData = ExistingClass->DefinitionData;
2418 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2421 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2422 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2424 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2425 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2426 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2427 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2429 llvm_unreachable("merged an unknown kind of redeclarable template");
2432 /// \brief Attempts to merge the given declaration (D) with another declaration
2433 /// of the same entity.
2434 template<typename T>
2435 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2436 RedeclarableResult &Redecl,
2437 DeclID TemplatePatternID) {
2438 T *D = static_cast<T*>(DBase);
2439 T *ExistingCanon = Existing->getCanonicalDecl();
2440 T *DCanon = D->getCanonicalDecl();
2441 if (ExistingCanon != DCanon) {
2442 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2443 "already merged this declaration");
2445 // Have our redeclaration link point back at the canonical declaration
2446 // of the existing declaration, so that this declaration has the
2447 // appropriate canonical declaration.
2448 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2449 D->First = ExistingCanon;
2450 ExistingCanon->Used |= D->Used;
2453 // When we merge a namespace, update its pointer to the first namespace.
2454 // We cannot have loaded any redeclarations of this declaration yet, so
2455 // there's nothing else that needs to be updated.
2456 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2457 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2458 assert_cast<NamespaceDecl*>(ExistingCanon));
2460 // When we merge a template, merge its pattern.
2461 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2462 mergeTemplatePattern(
2463 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2464 TemplatePatternID, Redecl.isKeyDecl());
2466 // If this declaration is a key declaration, make a note of that.
2467 if (Redecl.isKeyDecl())
2468 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2472 /// \brief Attempts to merge the given declaration (D) with another declaration
2473 /// of the same entity, for the case where the entity is not actually
2474 /// redeclarable. This happens, for instance, when merging the fields of
2475 /// identical class definitions from two different modules.
2476 template<typename T>
2477 void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2478 // If modules are not available, there is no reason to perform this merge.
2479 if (!Reader.getContext().getLangOpts().Modules)
2482 // ODR-based merging is only performed in C++. In C, identically-named things
2483 // in different translation units are not redeclarations (but may still have
2484 // compatible types).
2485 if (!Reader.getContext().getLangOpts().CPlusPlus)
2488 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2489 if (T *Existing = ExistingRes)
2490 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2491 Existing->getCanonicalDecl());
2494 void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2496 unsigned NumVars = D->varlist_size();
2497 SmallVector<Expr *, 16> Vars;
2498 Vars.reserve(NumVars);
2499 for (unsigned i = 0; i != NumVars; ++i) {
2500 Vars.push_back(Record.readExpr());
2505 void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2507 D->setLocation(ReadSourceLocation());
2508 D->setCombiner(Record.readExpr());
2509 D->setInitializer(Record.readExpr());
2510 D->PrevDeclInScope = ReadDeclID();
2513 void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2517 //===----------------------------------------------------------------------===//
2518 // Attribute Reading
2519 //===----------------------------------------------------------------------===//
2521 /// \brief Reads attributes from the current stream position.
2522 void ASTReader::ReadAttributes(ASTRecordReader &Record, AttrVec &Attrs) {
2523 for (unsigned i = 0, e = Record.readInt(); i != e; ++i) {
2524 Attr *New = nullptr;
2525 attr::Kind Kind = (attr::Kind)Record.readInt();
2526 SourceRange Range = Record.readSourceRange();
2527 ASTContext &Context = getContext();
2529 #include "clang/Serialization/AttrPCHRead.inc"
2531 assert(New && "Unable to decode attribute?");
2532 Attrs.push_back(New);
2536 //===----------------------------------------------------------------------===//
2537 // ASTReader Implementation
2538 //===----------------------------------------------------------------------===//
2540 /// \brief Note that we have loaded the declaration with the given
2543 /// This routine notes that this declaration has already been loaded,
2544 /// so that future GetDecl calls will return this declaration rather
2545 /// than trying to load a new declaration.
2546 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2547 assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2548 DeclsLoaded[Index] = D;
2552 /// \brief Determine whether the consumer will be interested in seeing
2553 /// this declaration (via HandleTopLevelDecl).
2555 /// This routine should return true for anything that might affect
2556 /// code generation, e.g., inline function definitions, Objective-C
2557 /// declarations with metadata, etc.
2558 static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2559 // An ObjCMethodDecl is never considered as "interesting" because its
2560 // implementation container always is.
2562 // An ImportDecl or VarDecl imported from a module will get emitted when
2563 // we import the relevant module.
2564 if ((isa<ImportDecl>(D) || isa<VarDecl>(D)) && D->getImportedOwningModule() &&
2565 Ctx.DeclMustBeEmitted(D))
2568 if (isa<FileScopeAsmDecl>(D) ||
2569 isa<ObjCProtocolDecl>(D) ||
2570 isa<ObjCImplDecl>(D) ||
2571 isa<ImportDecl>(D) ||
2572 isa<PragmaCommentDecl>(D) ||
2573 isa<PragmaDetectMismatchDecl>(D))
2575 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D))
2576 return !D->getDeclContext()->isFunctionOrMethod();
2577 if (VarDecl *Var = dyn_cast<VarDecl>(D))
2578 return Var->isFileVarDecl() &&
2579 Var->isThisDeclarationADefinition() == VarDecl::Definition;
2580 if (FunctionDecl *Func = dyn_cast<FunctionDecl>(D))
2581 return Func->doesThisDeclarationHaveABody() || HasBody;
2583 if (auto *ES = D->getASTContext().getExternalSource())
2584 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2590 /// \brief Get the correct cursor and offset for loading a declaration.
2591 ASTReader::RecordLocation
2592 ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2593 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2594 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2595 ModuleFile *M = I->second;
2596 const DeclOffset &DOffs =
2597 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2598 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2599 return RecordLocation(M, DOffs.BitOffset);
2602 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2603 ContinuousRangeMap<uint64_t, ModuleFile*, 4>::iterator I
2604 = GlobalBitOffsetsMap.find(GlobalOffset);
2606 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2607 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2610 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2611 return LocalOffset + M.GlobalBitOffset;
2614 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2615 const TemplateParameterList *Y);
2617 /// \brief Determine whether two template parameters are similar enough
2618 /// that they may be used in declarations of the same template.
2619 static bool isSameTemplateParameter(const NamedDecl *X,
2620 const NamedDecl *Y) {
2621 if (X->getKind() != Y->getKind())
2624 if (const TemplateTypeParmDecl *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2625 const TemplateTypeParmDecl *TY = cast<TemplateTypeParmDecl>(Y);
2626 return TX->isParameterPack() == TY->isParameterPack();
2629 if (const NonTypeTemplateParmDecl *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2630 const NonTypeTemplateParmDecl *TY = cast<NonTypeTemplateParmDecl>(Y);
2631 return TX->isParameterPack() == TY->isParameterPack() &&
2632 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2635 const TemplateTemplateParmDecl *TX = cast<TemplateTemplateParmDecl>(X);
2636 const TemplateTemplateParmDecl *TY = cast<TemplateTemplateParmDecl>(Y);
2637 return TX->isParameterPack() == TY->isParameterPack() &&
2638 isSameTemplateParameterList(TX->getTemplateParameters(),
2639 TY->getTemplateParameters());
2642 static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2643 if (auto *NS = X->getAsNamespace())
2645 if (auto *NAS = X->getAsNamespaceAlias())
2646 return NAS->getNamespace();
2650 static bool isSameQualifier(const NestedNameSpecifier *X,
2651 const NestedNameSpecifier *Y) {
2652 if (auto *NSX = getNamespace(X)) {
2653 auto *NSY = getNamespace(Y);
2654 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2656 } else if (X->getKind() != Y->getKind())
2659 // FIXME: For namespaces and types, we're permitted to check that the entity
2660 // is named via the same tokens. We should probably do so.
2661 switch (X->getKind()) {
2662 case NestedNameSpecifier::Identifier:
2663 if (X->getAsIdentifier() != Y->getAsIdentifier())
2666 case NestedNameSpecifier::Namespace:
2667 case NestedNameSpecifier::NamespaceAlias:
2668 // We've already checked that we named the same namespace.
2670 case NestedNameSpecifier::TypeSpec:
2671 case NestedNameSpecifier::TypeSpecWithTemplate:
2672 if (X->getAsType()->getCanonicalTypeInternal() !=
2673 Y->getAsType()->getCanonicalTypeInternal())
2676 case NestedNameSpecifier::Global:
2677 case NestedNameSpecifier::Super:
2681 // Recurse into earlier portion of NNS, if any.
2682 auto *PX = X->getPrefix();
2683 auto *PY = Y->getPrefix();
2685 return isSameQualifier(PX, PY);
2689 /// \brief Determine whether two template parameter lists are similar enough
2690 /// that they may be used in declarations of the same template.
2691 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2692 const TemplateParameterList *Y) {
2693 if (X->size() != Y->size())
2696 for (unsigned I = 0, N = X->size(); I != N; ++I)
2697 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2703 /// Determine whether the attributes we can overload on are identical for A and
2704 /// B. Will ignore any overloadable attrs represented in the type of A and B.
2705 static bool hasSameOverloadableAttrs(const FunctionDecl *A,
2706 const FunctionDecl *B) {
2707 // Note that pass_object_size attributes are represented in the function's
2708 // ExtParameterInfo, so we don't need to check them here.
2710 SmallVector<const EnableIfAttr *, 4> AEnableIfs;
2711 // Since this is an equality check, we can ignore that enable_if attrs show up
2712 // in reverse order.
2713 for (const auto *EIA : A->specific_attrs<EnableIfAttr>())
2714 AEnableIfs.push_back(EIA);
2716 SmallVector<const EnableIfAttr *, 4> BEnableIfs;
2717 for (const auto *EIA : B->specific_attrs<EnableIfAttr>())
2718 BEnableIfs.push_back(EIA);
2720 // Two very common cases: either we have 0 enable_if attrs, or we have an
2721 // unequal number of enable_if attrs.
2722 if (AEnableIfs.empty() && BEnableIfs.empty())
2725 if (AEnableIfs.size() != BEnableIfs.size())
2728 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2729 for (unsigned I = 0, E = AEnableIfs.size(); I != E; ++I) {
2733 AEnableIfs[I]->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2734 BEnableIfs[I]->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2735 if (Cand1ID != Cand2ID)
2742 /// \brief Determine whether the two declarations refer to the same entity.
2743 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2744 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2749 // Must be in the same context.
2750 if (!X->getDeclContext()->getRedeclContext()->Equals(
2751 Y->getDeclContext()->getRedeclContext()))
2754 // Two typedefs refer to the same entity if they have the same underlying
2756 if (TypedefNameDecl *TypedefX = dyn_cast<TypedefNameDecl>(X))
2757 if (TypedefNameDecl *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2758 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2759 TypedefY->getUnderlyingType());
2761 // Must have the same kind.
2762 if (X->getKind() != Y->getKind())
2765 // Objective-C classes and protocols with the same name always match.
2766 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2769 if (isa<ClassTemplateSpecializationDecl>(X)) {
2770 // No need to handle these here: we merge them when adding them to the
2775 // Compatible tags match.
2776 if (TagDecl *TagX = dyn_cast<TagDecl>(X)) {
2777 TagDecl *TagY = cast<TagDecl>(Y);
2778 return (TagX->getTagKind() == TagY->getTagKind()) ||
2779 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2780 TagX->getTagKind() == TTK_Interface) &&
2781 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2782 TagY->getTagKind() == TTK_Interface));
2785 // Functions with the same type and linkage match.
2786 // FIXME: This needs to cope with merging of prototyped/non-prototyped
2788 if (FunctionDecl *FuncX = dyn_cast<FunctionDecl>(X)) {
2789 FunctionDecl *FuncY = cast<FunctionDecl>(Y);
2790 if (CXXConstructorDecl *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
2791 CXXConstructorDecl *CtorY = cast<CXXConstructorDecl>(Y);
2792 if (CtorX->getInheritedConstructor() &&
2793 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
2794 CtorY->getInheritedConstructor().getConstructor()))
2797 ASTContext &C = FuncX->getASTContext();
2798 if (!C.hasSameType(FuncX->getType(), FuncY->getType())) {
2799 // We can get functions with different types on the redecl chain in C++17
2800 // if they have differing exception specifications and at least one of
2801 // the excpetion specs is unresolved.
2802 // FIXME: Do we need to check for C++14 deduced return types here too?
2803 auto *XFPT = FuncX->getType()->getAs<FunctionProtoType>();
2804 auto *YFPT = FuncY->getType()->getAs<FunctionProtoType>();
2805 if (C.getLangOpts().CPlusPlus1z && XFPT && YFPT &&
2806 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
2807 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
2808 C.hasSameFunctionTypeIgnoringExceptionSpec(FuncX->getType(),
2813 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
2814 hasSameOverloadableAttrs(FuncX, FuncY);
2817 // Variables with the same type and linkage match.
2818 if (VarDecl *VarX = dyn_cast<VarDecl>(X)) {
2819 VarDecl *VarY = cast<VarDecl>(Y);
2820 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
2821 ASTContext &C = VarX->getASTContext();
2822 if (C.hasSameType(VarX->getType(), VarY->getType()))
2825 // We can get decls with different types on the redecl chain. Eg.
2826 // template <typename T> struct S { static T Var[]; }; // #1
2827 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
2828 // Only? happens when completing an incomplete array type. In this case
2829 // when comparing #1 and #2 we should go through their element type.
2830 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
2831 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
2832 if (!VarXTy || !VarYTy)
2834 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
2835 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
2840 // Namespaces with the same name and inlinedness match.
2841 if (NamespaceDecl *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
2842 NamespaceDecl *NamespaceY = cast<NamespaceDecl>(Y);
2843 return NamespaceX->isInline() == NamespaceY->isInline();
2846 // Identical template names and kinds match if their template parameter lists
2847 // and patterns match.
2848 if (TemplateDecl *TemplateX = dyn_cast<TemplateDecl>(X)) {
2849 TemplateDecl *TemplateY = cast<TemplateDecl>(Y);
2850 return isSameEntity(TemplateX->getTemplatedDecl(),
2851 TemplateY->getTemplatedDecl()) &&
2852 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
2853 TemplateY->getTemplateParameters());
2856 // Fields with the same name and the same type match.
2857 if (FieldDecl *FDX = dyn_cast<FieldDecl>(X)) {
2858 FieldDecl *FDY = cast<FieldDecl>(Y);
2859 // FIXME: Also check the bitwidth is odr-equivalent, if any.
2860 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
2863 // Indirect fields with the same target field match.
2864 if (auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
2865 auto *IFDY = cast<IndirectFieldDecl>(Y);
2866 return IFDX->getAnonField()->getCanonicalDecl() ==
2867 IFDY->getAnonField()->getCanonicalDecl();
2870 // Enumerators with the same name match.
2871 if (isa<EnumConstantDecl>(X))
2872 // FIXME: Also check the value is odr-equivalent.
2875 // Using shadow declarations with the same target match.
2876 if (UsingShadowDecl *USX = dyn_cast<UsingShadowDecl>(X)) {
2877 UsingShadowDecl *USY = cast<UsingShadowDecl>(Y);
2878 return USX->getTargetDecl() == USY->getTargetDecl();
2881 // Using declarations with the same qualifier match. (We already know that
2882 // the name matches.)
2883 if (auto *UX = dyn_cast<UsingDecl>(X)) {
2884 auto *UY = cast<UsingDecl>(Y);
2885 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2886 UX->hasTypename() == UY->hasTypename() &&
2887 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2889 if (auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
2890 auto *UY = cast<UnresolvedUsingValueDecl>(Y);
2891 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2892 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2894 if (auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
2895 return isSameQualifier(
2897 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
2899 // Namespace alias definitions with the same target match.
2900 if (auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
2901 auto *NAY = cast<NamespaceAliasDecl>(Y);
2902 return NAX->getNamespace()->Equals(NAY->getNamespace());
2908 /// Find the context in which we should search for previous declarations when
2909 /// looking for declarations to merge.
2910 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
2912 if (NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC))
2913 return ND->getOriginalNamespace();
2915 if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) {
2916 // Try to dig out the definition.
2917 auto *DD = RD->DefinitionData;
2919 DD = RD->getCanonicalDecl()->DefinitionData;
2921 // If there's no definition yet, then DC's definition is added by an update
2922 // record, but we've not yet loaded that update record. In this case, we
2923 // commit to DC being the canonical definition now, and will fix this when
2924 // we load the update record.
2926 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
2927 RD->IsCompleteDefinition = true;
2928 RD->DefinitionData = DD;
2929 RD->getCanonicalDecl()->DefinitionData = DD;
2931 // Track that we did this horrible thing so that we can fix it later.
2932 Reader.PendingFakeDefinitionData.insert(
2933 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
2936 return DD->Definition;
2939 if (EnumDecl *ED = dyn_cast<EnumDecl>(DC))
2940 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
2943 // We can see the TU here only if we have no Sema object. In that case,
2944 // there's no TU scope to look in, so using the DC alone is sufficient.
2945 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
2951 ASTDeclReader::FindExistingResult::~FindExistingResult() {
2952 // Record that we had a typedef name for linkage whether or not we merge
2953 // with that declaration.
2954 if (TypedefNameForLinkage) {
2955 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2956 Reader.ImportedTypedefNamesForLinkage.insert(
2957 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
2961 if (!AddResult || Existing)
2964 DeclarationName Name = New->getDeclName();
2965 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2966 if (needsAnonymousDeclarationNumber(New)) {
2967 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
2968 AnonymousDeclNumber, New);
2969 } else if (DC->isTranslationUnit() &&
2970 !Reader.getContext().getLangOpts().CPlusPlus) {
2971 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
2972 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
2974 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
2975 // Add the declaration to its redeclaration context so later merging
2976 // lookups will find it.
2977 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
2981 /// Find the declaration that should be merged into, given the declaration found
2982 /// by name lookup. If we're merging an anonymous declaration within a typedef,
2983 /// we need a matching typedef, and we merge with the type inside it.
2984 static NamedDecl *getDeclForMerging(NamedDecl *Found,
2985 bool IsTypedefNameForLinkage) {
2986 if (!IsTypedefNameForLinkage)
2989 // If we found a typedef declaration that gives a name to some other
2990 // declaration, then we want that inner declaration. Declarations from
2991 // AST files are handled via ImportedTypedefNamesForLinkage.
2992 if (Found->isFromASTFile())
2995 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
2996 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3001 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3004 // If the lexical context has been merged, look into the now-canonical
3006 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
3009 // If we've seen this before, return the canonical declaration.
3010 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
3011 if (Index < Previous.size() && Previous[Index])
3012 return Previous[Index];
3014 // If this is the first time, but we have parsed a declaration of the context,
3015 // build the anonymous declaration list from the parsed declaration.
3016 if (!cast<Decl>(DC)->isFromASTFile()) {
3017 numberAnonymousDeclsWithin(DC, [&](NamedDecl *ND, unsigned Number) {
3018 if (Previous.size() == Number)
3019 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3021 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3025 return Index < Previous.size() ? Previous[Index] : nullptr;
3028 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3029 DeclContext *DC, unsigned Index,
3031 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
3034 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
3035 if (Index >= Previous.size())
3036 Previous.resize(Index + 1);
3037 if (!Previous[Index])
3038 Previous[Index] = D;
3041 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3042 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3045 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3046 // Don't bother trying to find unnamed declarations that are in
3047 // unmergeable contexts.
3048 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3049 AnonymousDeclNumber, TypedefNameForLinkage);
3054 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3055 if (TypedefNameForLinkage) {
3056 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3057 std::make_pair(DC, TypedefNameForLinkage));
3058 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3059 if (isSameEntity(It->second, D))
3060 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3061 TypedefNameForLinkage);
3062 // Go on to check in other places in case an existing typedef name
3063 // was not imported.
3066 if (needsAnonymousDeclarationNumber(D)) {
3067 // This is an anonymous declaration that we may need to merge. Look it up
3068 // in its context by number.
3069 if (auto *Existing = getAnonymousDeclForMerging(
3070 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3071 if (isSameEntity(Existing, D))
3072 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3073 TypedefNameForLinkage);
3074 } else if (DC->isTranslationUnit() &&
3075 !Reader.getContext().getLangOpts().CPlusPlus) {
3076 IdentifierResolver &IdResolver = Reader.getIdResolver();
3078 // Temporarily consider the identifier to be up-to-date. We don't want to
3079 // cause additional lookups here.
3080 class UpToDateIdentifierRAII {
3085 explicit UpToDateIdentifierRAII(IdentifierInfo *II)
3086 : II(II), WasOutToDate(false)
3089 WasOutToDate = II->isOutOfDate();
3091 II->setOutOfDate(false);
3095 ~UpToDateIdentifierRAII() {
3097 II->setOutOfDate(true);
3099 } UpToDate(Name.getAsIdentifierInfo());
3101 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3102 IEnd = IdResolver.end();
3104 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3105 if (isSameEntity(Existing, D))
3106 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3107 TypedefNameForLinkage);
3109 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3110 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3111 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3112 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3113 if (isSameEntity(Existing, D))
3114 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3115 TypedefNameForLinkage);
3118 // Not in a mergeable context.
3119 return FindExistingResult(Reader);
3122 // If this declaration is from a merged context, make a note that we need to
3123 // check that the canonical definition of that context contains the decl.
3125 // FIXME: We should do something similar if we merge two definitions of the
3126 // same template specialization into the same CXXRecordDecl.
3127 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3128 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3129 MergedDCIt->second == D->getDeclContext())
3130 Reader.PendingOdrMergeChecks.push_back(D);
3132 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3133 AnonymousDeclNumber, TypedefNameForLinkage);
3136 template<typename DeclT>
3137 Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3138 return D->RedeclLink.getLatestNotUpdated();
3140 Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3141 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3144 Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3147 switch (D->getKind()) {
3148 #define ABSTRACT_DECL(TYPE)
3149 #define DECL(TYPE, BASE) \
3151 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3152 #include "clang/AST/DeclNodes.inc"
3154 llvm_unreachable("unknown decl kind");
3157 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3158 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3161 template<typename DeclT>
3162 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3163 Redeclarable<DeclT> *D,
3164 Decl *Previous, Decl *Canon) {
3165 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3166 D->First = cast<DeclT>(Previous)->First;
3171 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3172 Redeclarable<VarDecl> *D,
3173 Decl *Previous, Decl *Canon) {
3174 VarDecl *VD = static_cast<VarDecl*>(D);
3175 VarDecl *PrevVD = cast<VarDecl>(Previous);
3176 D->RedeclLink.setPrevious(PrevVD);
3177 D->First = PrevVD->First;
3179 // We should keep at most one definition on the chain.
3180 // FIXME: Cache the definition once we've found it. Building a chain with
3181 // N definitions currently takes O(N^2) time here.
3182 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3183 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3184 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3185 Reader.mergeDefinitionVisibility(CurD, VD);
3186 VD->demoteThisDefinitionToDeclaration();
3194 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3195 Redeclarable<FunctionDecl> *D,
3196 Decl *Previous, Decl *Canon) {
3197 FunctionDecl *FD = static_cast<FunctionDecl*>(D);
3198 FunctionDecl *PrevFD = cast<FunctionDecl>(Previous);
3200 FD->RedeclLink.setPrevious(PrevFD);
3201 FD->First = PrevFD->First;
3203 // If the previous declaration is an inline function declaration, then this
3204 // declaration is too.
3205 if (PrevFD->IsInline != FD->IsInline) {
3206 // FIXME: [dcl.fct.spec]p4:
3207 // If a function with external linkage is declared inline in one
3208 // translation unit, it shall be declared inline in all translation
3209 // units in which it appears.
3211 // Be careful of this case:
3214 // template<typename T> struct X { void f(); };
3215 // template<typename T> inline void X<T>::f() {}
3217 // module B instantiates the declaration of X<int>::f
3218 // module C instantiates the definition of X<int>::f
3220 // If module B and C are merged, we do not have a violation of this rule.
3221 FD->IsInline = true;
3224 // If we need to propagate an exception specification along the redecl
3225 // chain, make a note of that so that we can do so later.
3226 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3227 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3228 if (FPT && PrevFPT) {
3229 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3230 bool WasUnresolved =
3231 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3232 if (IsUnresolved != WasUnresolved)
3233 Reader.PendingExceptionSpecUpdates.insert(
3234 std::make_pair(Canon, IsUnresolved ? PrevFD : FD));
3237 } // end namespace clang
3239 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3240 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3243 /// Inherit the default template argument from \p From to \p To. Returns
3244 /// \c false if there is no default template for \p From.
3245 template <typename ParmDecl>
3246 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3248 auto *To = cast<ParmDecl>(ToD);
3249 if (!From->hasDefaultArgument())
3251 To->setInheritedDefaultArgument(Context, From);
3255 static void inheritDefaultTemplateArguments(ASTContext &Context,
3258 auto *FromTP = From->getTemplateParameters();
3259 auto *ToTP = To->getTemplateParameters();
3260 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3262 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3263 NamedDecl *FromParam = FromTP->getParam(N - I - 1);
3264 if (FromParam->isParameterPack())
3266 NamedDecl *ToParam = ToTP->getParam(N - I - 1);
3268 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam)) {
3269 if (!inheritDefaultTemplateArgument(Context, FTTP, ToParam))
3271 } else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam)) {
3272 if (!inheritDefaultTemplateArgument(Context, FNTTP, ToParam))
3275 if (!inheritDefaultTemplateArgument(
3276 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam))
3282 void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3283 Decl *Previous, Decl *Canon) {
3284 assert(D && Previous);
3286 switch (D->getKind()) {
3287 #define ABSTRACT_DECL(TYPE)
3288 #define DECL(TYPE, BASE) \
3290 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3292 #include "clang/AST/DeclNodes.inc"
3295 // If the declaration was visible in one module, a redeclaration of it in
3296 // another module remains visible even if it wouldn't be visible by itself.
3298 // FIXME: In this case, the declaration should only be visible if a module
3299 // that makes it visible has been imported.
3300 D->IdentifierNamespace |=
3301 Previous->IdentifierNamespace &
3302 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3304 // If the declaration declares a template, it may inherit default arguments
3305 // from the previous declaration.
3306 if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D))
3307 inheritDefaultTemplateArguments(Reader.getContext(),
3308 cast<TemplateDecl>(Previous), TD);
3311 template<typename DeclT>
3312 void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3313 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3315 void ASTDeclReader::attachLatestDeclImpl(...) {
3316 llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3319 void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3320 assert(D && Latest);
3322 switch (D->getKind()) {
3323 #define ABSTRACT_DECL(TYPE)
3324 #define DECL(TYPE, BASE) \
3326 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3328 #include "clang/AST/DeclNodes.inc"
3332 template<typename DeclT>
3333 void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3334 D->RedeclLink.markIncomplete();
3336 void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3337 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3340 void ASTReader::markIncompleteDeclChain(Decl *D) {
3341 switch (D->getKind()) {
3342 #define ABSTRACT_DECL(TYPE)
3343 #define DECL(TYPE, BASE) \
3345 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3347 #include "clang/AST/DeclNodes.inc"
3351 /// \brief Read the declaration at the given offset from the AST file.
3352 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3353 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3354 SourceLocation DeclLoc;
3355 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3356 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3357 // Keep track of where we are in the stream, then jump back there
3358 // after reading this declaration.
3359 SavedStreamPosition SavedPosition(DeclsCursor);
3361 ReadingKindTracker ReadingKind(Read_Decl, *this);
3363 // Note that we are loading a declaration record.
3364 Deserializing ADecl(this);
3366 DeclsCursor.JumpToBit(Loc.Offset);
3367 ASTRecordReader Record(*this, *Loc.F);
3368 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3369 unsigned Code = DeclsCursor.ReadCode();
3371 ASTContext &Context = getContext();
3373 switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3374 case DECL_CONTEXT_LEXICAL:
3375 case DECL_CONTEXT_VISIBLE:
3376 llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3378 D = TypedefDecl::CreateDeserialized(Context, ID);
3380 case DECL_TYPEALIAS:
3381 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3384 D = EnumDecl::CreateDeserialized(Context, ID);
3387 D = RecordDecl::CreateDeserialized(Context, ID);
3389 case DECL_ENUM_CONSTANT:
3390 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3393 D = FunctionDecl::CreateDeserialized(Context, ID);
3395 case DECL_LINKAGE_SPEC:
3396 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3399 D = ExportDecl::CreateDeserialized(Context, ID);
3402 D = LabelDecl::CreateDeserialized(Context, ID);
3404 case DECL_NAMESPACE:
3405 D = NamespaceDecl::CreateDeserialized(Context, ID);
3407 case DECL_NAMESPACE_ALIAS:
3408 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3411 D = UsingDecl::CreateDeserialized(Context, ID);
3413 case DECL_USING_PACK:
3414 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3416 case DECL_USING_SHADOW:
3417 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3419 case DECL_CONSTRUCTOR_USING_SHADOW:
3420 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3422 case DECL_USING_DIRECTIVE:
3423 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3425 case DECL_UNRESOLVED_USING_VALUE:
3426 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3428 case DECL_UNRESOLVED_USING_TYPENAME:
3429 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3431 case DECL_CXX_RECORD:
3432 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3434 case DECL_CXX_DEDUCTION_GUIDE:
3435 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3437 case DECL_CXX_METHOD:
3438 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3440 case DECL_CXX_CONSTRUCTOR:
3441 D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3443 case DECL_CXX_INHERITED_CONSTRUCTOR:
3444 D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3446 case DECL_CXX_DESTRUCTOR:
3447 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3449 case DECL_CXX_CONVERSION:
3450 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3452 case DECL_ACCESS_SPEC:
3453 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3456 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3458 case DECL_FRIEND_TEMPLATE:
3459 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3461 case DECL_CLASS_TEMPLATE:
3462 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3464 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3465 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3467 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3468 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3470 case DECL_VAR_TEMPLATE:
3471 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3473 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3474 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3476 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3477 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3479 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3480 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3482 case DECL_FUNCTION_TEMPLATE:
3483 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3485 case DECL_TEMPLATE_TYPE_PARM:
3486 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3488 case DECL_NON_TYPE_TEMPLATE_PARM:
3489 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3491 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3492 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3495 case DECL_TEMPLATE_TEMPLATE_PARM:
3496 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3498 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3499 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3502 case DECL_TYPE_ALIAS_TEMPLATE:
3503 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3505 case DECL_STATIC_ASSERT:
3506 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3508 case DECL_OBJC_METHOD:
3509 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3511 case DECL_OBJC_INTERFACE:
3512 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3514 case DECL_OBJC_IVAR:
3515 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3517 case DECL_OBJC_PROTOCOL:
3518 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3520 case DECL_OBJC_AT_DEFS_FIELD:
3521 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3523 case DECL_OBJC_CATEGORY:
3524 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3526 case DECL_OBJC_CATEGORY_IMPL:
3527 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3529 case DECL_OBJC_IMPLEMENTATION:
3530 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3532 case DECL_OBJC_COMPATIBLE_ALIAS:
3533 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3535 case DECL_OBJC_PROPERTY:
3536 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3538 case DECL_OBJC_PROPERTY_IMPL:
3539 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3542 D = FieldDecl::CreateDeserialized(Context, ID);
3544 case DECL_INDIRECTFIELD:
3545 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3548 D = VarDecl::CreateDeserialized(Context, ID);
3550 case DECL_IMPLICIT_PARAM:
3551 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3554 D = ParmVarDecl::CreateDeserialized(Context, ID);
3556 case DECL_DECOMPOSITION:
3557 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3560 D = BindingDecl::CreateDeserialized(Context, ID);
3562 case DECL_FILE_SCOPE_ASM:
3563 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3566 D = BlockDecl::CreateDeserialized(Context, ID);
3568 case DECL_MS_PROPERTY:
3569 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3572 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3574 case DECL_CXX_BASE_SPECIFIERS:
3575 Error("attempt to read a C++ base-specifier record as a declaration");
3577 case DECL_CXX_CTOR_INITIALIZERS:
3578 Error("attempt to read a C++ ctor initializer record as a declaration");
3581 // Note: last entry of the ImportDecl record is the number of stored source
3583 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3585 case DECL_OMP_THREADPRIVATE:
3586 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3588 case DECL_OMP_DECLARE_REDUCTION:
3589 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
3591 case DECL_OMP_CAPTUREDEXPR:
3592 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3594 case DECL_PRAGMA_COMMENT:
3595 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3597 case DECL_PRAGMA_DETECT_MISMATCH:
3598 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
3602 D = EmptyDecl::CreateDeserialized(Context, ID);
3604 case DECL_OBJC_TYPE_PARAM:
3605 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3609 assert(D && "Unknown declaration reading AST file");
3610 LoadedDecl(Index, D);
3611 // Set the DeclContext before doing any deserialization, to make sure internal
3612 // calls to Decl::getASTContext() by Decl's methods will find the
3613 // TranslationUnitDecl without crashing.
3614 D->setDeclContext(Context.getTranslationUnitDecl());
3617 // If this declaration is also a declaration context, get the
3618 // offsets for its tables of lexical and visible declarations.
3619 if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
3620 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3621 if (Offsets.first &&
3622 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3624 if (Offsets.second &&
3625 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3628 assert(Record.getIdx() == Record.size());
3630 // Load any relevant update records.
3631 PendingUpdateRecords.push_back(
3632 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3634 // Load the categories after recursive loading is finished.
3635 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(D))
3636 // If we already have a definition when deserializing the ObjCInterfaceDecl,
3637 // we put the Decl in PendingDefinitions so we can pull the categories here.
3638 if (Class->isThisDeclarationADefinition() ||
3639 PendingDefinitions.count(Class))
3640 loadObjCCategories(ID, Class);
3642 // If we have deserialized a declaration that has a definition the
3643 // AST consumer might need to know about, queue it.
3644 // We don't pass it to the consumer immediately because we may be in recursive
3645 // loading, and some declarations may still be initializing.
3646 PotentiallyInterestingDecls.push_back(
3647 InterestingDecl(D, Reader.hasPendingBody()));
3652 void ASTReader::PassInterestingDeclsToConsumer() {
3655 if (PassingDeclsToConsumer)
3658 // Guard variable to avoid recursively redoing the process of passing
3659 // decls to consumer.
3660 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3663 // Ensure that we've loaded all potentially-interesting declarations
3664 // that need to be eagerly loaded.
3665 for (auto ID : EagerlyDeserializedDecls)
3667 EagerlyDeserializedDecls.clear();
3669 while (!PotentiallyInterestingDecls.empty()) {
3670 InterestingDecl D = PotentiallyInterestingDecls.front();
3671 PotentiallyInterestingDecls.pop_front();
3672 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3673 PassInterestingDeclToConsumer(D.getDecl());
3677 void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3678 // The declaration may have been modified by files later in the chain.
3679 // If this is the case, read the record containing the updates from each file
3680 // and pass it to ASTDeclReader to make the modifications.
3681 serialization::GlobalDeclID ID = Record.ID;
3683 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3684 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3686 llvm::SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3688 if (UpdI != DeclUpdateOffsets.end()) {
3689 auto UpdateOffsets = std::move(UpdI->second);
3690 DeclUpdateOffsets.erase(UpdI);
3692 // Check if this decl was interesting to the consumer. If we just loaded
3693 // the declaration, then we know it was interesting and we skip the call
3694 // to isConsumerInterestedIn because it is unsafe to call in the
3695 // current ASTReader state.
3696 bool WasInteresting =
3697 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
3698 for (auto &FileAndOffset : UpdateOffsets) {
3699 ModuleFile *F = FileAndOffset.first;
3700 uint64_t Offset = FileAndOffset.second;
3701 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3702 SavedStreamPosition SavedPosition(Cursor);
3703 Cursor.JumpToBit(Offset);
3704 unsigned Code = Cursor.ReadCode();
3705 ASTRecordReader Record(*this, *F);
3706 unsigned RecCode = Record.readRecord(Cursor, Code);
3708 assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3710 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
3712 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
3714 // We might have made this declaration interesting. If so, remember that
3715 // we need to hand it off to the consumer.
3716 if (!WasInteresting &&
3717 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
3718 PotentiallyInterestingDecls.push_back(
3719 InterestingDecl(D, Reader.hasPendingBody()));
3720 WasInteresting = true;
3724 // Add the lazy specializations to the template.
3725 assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||
3726 isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&
3727 "Must not have pending specializations");
3728 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
3729 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
3730 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
3731 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
3732 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
3733 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
3734 PendingLazySpecializationIDs.clear();
3736 // Load the pending visible updates for this decl context, if it has any.
3737 auto I = PendingVisibleUpdates.find(ID);
3738 if (I != PendingVisibleUpdates.end()) {
3739 auto VisibleUpdates = std::move(I->second);
3740 PendingVisibleUpdates.erase(I);
3742 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
3743 for (const PendingVisibleUpdate &Update : VisibleUpdates)
3744 Lookups[DC].Table.add(
3745 Update.Mod, Update.Data,
3746 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
3747 DC->setHasExternalVisibleStorage(true);
3751 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
3752 // Attach FirstLocal to the end of the decl chain.
3753 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
3754 if (FirstLocal != CanonDecl) {
3755 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
3756 ASTDeclReader::attachPreviousDecl(
3757 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
3762 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
3766 // Load the list of other redeclarations from this module file.
3767 ModuleFile *M = getOwningModuleFile(FirstLocal);
3768 assert(M && "imported decl from no module file");
3770 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
3771 SavedStreamPosition SavedPosition(Cursor);
3772 Cursor.JumpToBit(LocalOffset);
3775 unsigned Code = Cursor.ReadCode();
3776 unsigned RecCode = Cursor.readRecord(Code, Record);
3778 assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
3780 // FIXME: We have several different dispatches on decl kind here; maybe
3781 // we should instead generate one loop per kind and dispatch up-front?
3782 Decl *MostRecent = FirstLocal;
3783 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
3784 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
3785 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
3788 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
3792 /// \brief Given an ObjC interface, goes through the modules and links to the
3793 /// interface all the categories for it.
3794 class ObjCCategoriesVisitor {
3796 ObjCInterfaceDecl *Interface;
3797 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
3798 ObjCCategoryDecl *Tail;
3799 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
3800 serialization::GlobalDeclID InterfaceID;
3801 unsigned PreviousGeneration;
3803 void add(ObjCCategoryDecl *Cat) {
3804 // Only process each category once.
3805 if (!Deserialized.erase(Cat))
3808 // Check for duplicate categories.
3809 if (Cat->getDeclName()) {
3810 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
3812 Reader.getOwningModuleFile(Existing)
3813 != Reader.getOwningModuleFile(Cat)) {
3814 // FIXME: We should not warn for duplicates in diamond:
3822 // If there are duplicates in ML/MR, there will be warning when
3823 // creating MB *and* when importing MB. We should not warn when
3825 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
3826 << Interface->getDeclName() << Cat->getDeclName();
3827 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
3828 } else if (!Existing) {
3829 // Record this category.
3834 // Add this category to the end of the chain.
3836 ASTDeclReader::setNextObjCCategory(Tail, Cat);
3838 Interface->setCategoryListRaw(Cat);
3843 ObjCCategoriesVisitor(ASTReader &Reader,
3844 ObjCInterfaceDecl *Interface,
3845 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
3846 serialization::GlobalDeclID InterfaceID,
3847 unsigned PreviousGeneration)
3848 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
3849 Tail(nullptr), InterfaceID(InterfaceID),
3850 PreviousGeneration(PreviousGeneration)
3852 // Populate the name -> category map with the set of known categories.
3853 for (auto *Cat : Interface->known_categories()) {
3854 if (Cat->getDeclName())
3855 NameCategoryMap[Cat->getDeclName()] = Cat;
3857 // Keep track of the tail of the category list.
3862 bool operator()(ModuleFile &M) {
3863 // If we've loaded all of the category information we care about from
3864 // this module file, we're done.
3865 if (M.Generation <= PreviousGeneration)
3868 // Map global ID of the definition down to the local ID used in this
3869 // module file. If there is no such mapping, we'll find nothing here
3870 // (or in any module it imports).
3871 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
3875 // Perform a binary search to find the local redeclarations for this
3876 // declaration (if any).
3877 const ObjCCategoriesInfo Compare = { LocalID, 0 };
3878 const ObjCCategoriesInfo *Result
3879 = std::lower_bound(M.ObjCCategoriesMap,
3880 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
3882 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
3883 Result->DefinitionID != LocalID) {
3884 // We didn't find anything. If the class definition is in this module
3885 // file, then the module files it depends on cannot have any categories,
3886 // so suppress further lookup.
3887 return Reader.isDeclIDFromModule(InterfaceID, M);
3890 // We found something. Dig out all of the categories.
3891 unsigned Offset = Result->Offset;
3892 unsigned N = M.ObjCCategories[Offset];
3893 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
3894 for (unsigned I = 0; I != N; ++I)
3895 add(cast_or_null<ObjCCategoryDecl>(
3896 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
3900 } // end anonymous namespace
3902 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
3903 ObjCInterfaceDecl *D,
3904 unsigned PreviousGeneration) {
3905 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
3906 PreviousGeneration);
3907 ModuleMgr.visit(Visitor);
3910 template<typename DeclT, typename Fn>
3911 static void forAllLaterRedecls(DeclT *D, Fn F) {
3914 // Check whether we've already merged D into its redeclaration chain.
3915 // MostRecent may or may not be nullptr if D has not been merged. If
3916 // not, walk the merged redecl chain and see if it's there.
3917 auto *MostRecent = D->getMostRecentDecl();
3919 for (auto *Redecl = MostRecent; Redecl && !Found;
3920 Redecl = Redecl->getPreviousDecl())
3921 Found = (Redecl == D);
3923 // If this declaration is merged, apply the functor to all later decls.
3925 for (auto *Redecl = MostRecent; Redecl != D;
3926 Redecl = Redecl->getPreviousDecl())
3931 void ASTDeclReader::UpdateDecl(Decl *D,
3932 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
3933 while (Record.getIdx() < Record.size()) {
3934 switch ((DeclUpdateKind)Record.readInt()) {
3935 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
3936 auto *RD = cast<CXXRecordDecl>(D);
3937 // FIXME: If we also have an update record for instantiating the
3938 // definition of D, we need that to happen before we get here.
3939 Decl *MD = Record.readDecl();
3940 assert(MD && "couldn't read decl from update record");
3941 // FIXME: We should call addHiddenDecl instead, to add the member
3942 // to its DeclContext.
3943 RD->addedMember(MD);
3947 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
3948 // It will be added to the template's lazy specialization set.
3949 PendingLazySpecializationIDs.push_back(ReadDeclID());
3952 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
3953 NamespaceDecl *Anon = ReadDeclAs<NamespaceDecl>();
3955 // Each module has its own anonymous namespace, which is disjoint from
3956 // any other module's anonymous namespaces, so don't attach the anonymous
3957 // namespace at all.
3958 if (!Record.isModule()) {
3959 if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(D))
3960 TU->setAnonymousNamespace(Anon);
3962 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
3967 case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER: {
3968 VarDecl *VD = cast<VarDecl>(D);
3969 VD->getMemberSpecializationInfo()->setPointOfInstantiation(
3970 ReadSourceLocation());
3971 uint64_t Val = Record.readInt();
3972 if (Val && !VD->getInit()) {
3973 VD->setInit(Record.readExpr());
3974 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
3975 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
3976 Eval->CheckedICE = true;
3977 Eval->IsICE = Val == 3;
3983 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
3984 auto Param = cast<ParmVarDecl>(D);
3986 // We have to read the default argument regardless of whether we use it
3987 // so that hypothetical further update records aren't messed up.
3988 // TODO: Add a function to skip over the next expr record.
3989 auto DefaultArg = Record.readExpr();
3991 // Only apply the update if the parameter still has an uninstantiated
3992 // default argument.
3993 if (Param->hasUninstantiatedDefaultArg())
3994 Param->setDefaultArg(DefaultArg);
3998 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
3999 auto FD = cast<FieldDecl>(D);
4000 auto DefaultInit = Record.readExpr();
4002 // Only apply the update if the field still has an uninstantiated
4003 // default member initializer.
4004 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4006 FD->setInClassInitializer(DefaultInit);
4008 // Instantiation failed. We can get here if we serialized an AST for
4009 // an invalid program.
4010 FD->removeInClassInitializer();
4015 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4016 FunctionDecl *FD = cast<FunctionDecl>(D);
4017 if (Reader.PendingBodies[FD]) {
4018 // FIXME: Maybe check for ODR violations.
4019 // It's safe to stop now because this update record is always last.
4023 if (Record.readInt()) {
4024 // Maintain AST consistency: any later redeclarations of this function
4025 // are inline if this one is. (We might have merged another declaration
4027 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4028 FD->setImplicitlyInline();
4031 FD->setInnerLocStart(ReadSourceLocation());
4032 ReadFunctionDefinition(FD);
4033 assert(Record.getIdx() == Record.size() && "lazy body must be last");
4037 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4038 auto *RD = cast<CXXRecordDecl>(D);
4039 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4040 bool HadRealDefinition =
4041 OldDD && (OldDD->Definition != RD ||
4042 !Reader.PendingFakeDefinitionData.count(OldDD));
4043 ReadCXXRecordDefinition(RD, /*Update*/true);
4045 // Visible update is handled separately.
4046 uint64_t LexicalOffset = ReadLocalOffset();
4047 if (!HadRealDefinition && LexicalOffset) {
4048 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4049 Reader.PendingFakeDefinitionData.erase(OldDD);
4052 auto TSK = (TemplateSpecializationKind)Record.readInt();
4053 SourceLocation POI = ReadSourceLocation();
4054 if (MemberSpecializationInfo *MSInfo =
4055 RD->getMemberSpecializationInfo()) {
4056 MSInfo->setTemplateSpecializationKind(TSK);
4057 MSInfo->setPointOfInstantiation(POI);
4059 ClassTemplateSpecializationDecl *Spec =
4060 cast<ClassTemplateSpecializationDecl>(RD);
4061 Spec->setTemplateSpecializationKind(TSK);
4062 Spec->setPointOfInstantiation(POI);
4064 if (Record.readInt()) {
4066 ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4067 SmallVector<TemplateArgument, 8> TemplArgs;
4068 Record.readTemplateArgumentList(TemplArgs);
4069 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4070 Reader.getContext(), TemplArgs);
4072 // FIXME: If we already have a partial specialization set,
4073 // check that it matches.
4074 if (!Spec->getSpecializedTemplateOrPartial()
4075 .is<ClassTemplatePartialSpecializationDecl *>())
4076 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4080 RD->setTagKind((TagTypeKind)Record.readInt());
4081 RD->setLocation(ReadSourceLocation());
4082 RD->setLocStart(ReadSourceLocation());
4083 RD->setBraceRange(ReadSourceRange());
4085 if (Record.readInt()) {
4087 Record.readAttributes(Attrs);
4088 // If the declaration already has attributes, we assume that some other
4089 // AST file already loaded them.
4091 D->setAttrsImpl(Attrs, Reader.getContext());
4096 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4097 // Set the 'operator delete' directly to avoid emitting another update
4099 auto *Del = ReadDeclAs<FunctionDecl>();
4100 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4101 // FIXME: Check consistency if we have an old and new operator delete.
4102 if (!First->OperatorDelete)
4103 First->OperatorDelete = Del;
4107 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4108 FunctionProtoType::ExceptionSpecInfo ESI;
4109 SmallVector<QualType, 8> ExceptionStorage;
4110 Record.readExceptionSpec(ExceptionStorage, ESI);
4112 // Update this declaration's exception specification, if needed.
4113 auto *FD = cast<FunctionDecl>(D);
4114 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4115 // FIXME: If the exception specification is already present, check that it
4117 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4118 FD->setType(Reader.getContext().getFunctionType(
4119 FPT->getReturnType(), FPT->getParamTypes(),
4120 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4122 // When we get to the end of deserializing, see if there are other decls
4123 // that we need to propagate this exception specification onto.
4124 Reader.PendingExceptionSpecUpdates.insert(
4125 std::make_pair(FD->getCanonicalDecl(), FD));
4130 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4131 // FIXME: Also do this when merging redecls.
4132 QualType DeducedResultType = Record.readType();
4133 for (auto *Redecl : merged_redecls(D)) {
4134 // FIXME: If the return type is already deduced, check that it matches.
4135 FunctionDecl *FD = cast<FunctionDecl>(Redecl);
4136 Reader.getContext().adjustDeducedFunctionResultType(FD,
4142 case UPD_DECL_MARKED_USED: {
4143 // Maintain AST consistency: any later redeclarations are used too.
4144 D->markUsed(Reader.getContext());
4148 case UPD_MANGLING_NUMBER:
4149 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4153 case UPD_STATIC_LOCAL_NUMBER:
4154 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4158 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4159 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4160 ReadSourceRange()));
4163 case UPD_DECL_EXPORTED: {
4164 unsigned SubmoduleID = readSubmoduleID();
4165 auto *Exported = cast<NamedDecl>(D);
4166 if (auto *TD = dyn_cast<TagDecl>(Exported))
4167 Exported = TD->getDefinition();
4168 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4169 if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
4170 Reader.getContext().mergeDefinitionIntoModule(cast<NamedDecl>(Exported),
4172 Reader.PendingMergedDefinitionsToDeduplicate.insert(
4173 cast<NamedDecl>(Exported));
4174 } else if (Owner && Owner->NameVisibility != Module::AllVisible) {
4175 // If Owner is made visible at some later point, make this declaration
4177 Reader.HiddenNamesMap[Owner].push_back(Exported);
4179 // The declaration is now visible.
4180 Exported->setVisibleDespiteOwningModule();
4185 case UPD_DECL_MARKED_OPENMP_DECLARETARGET:
4186 case UPD_ADDED_ATTR_TO_RECORD:
4188 Record.readAttributes(Attrs);
4189 assert(Attrs.size() == 1);
4190 D->addAttr(Attrs[0]);