1 //===- ASTReaderDecl.cpp - Decl Deserialization ---------------------------===//
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/Attr.h"
19 #include "clang/AST/AttrIterator.h"
20 #include "clang/AST/Decl.h"
21 #include "clang/AST/DeclBase.h"
22 #include "clang/AST/DeclCXX.h"
23 #include "clang/AST/DeclFriend.h"
24 #include "clang/AST/DeclObjC.h"
25 #include "clang/AST/DeclOpenMP.h"
26 #include "clang/AST/DeclTemplate.h"
27 #include "clang/AST/DeclVisitor.h"
28 #include "clang/AST/DeclarationName.h"
29 #include "clang/AST/Expr.h"
30 #include "clang/AST/ExternalASTSource.h"
31 #include "clang/AST/LambdaCapture.h"
32 #include "clang/AST/NestedNameSpecifier.h"
33 #include "clang/AST/Redeclarable.h"
34 #include "clang/AST/Stmt.h"
35 #include "clang/AST/TemplateBase.h"
36 #include "clang/AST/Type.h"
37 #include "clang/AST/UnresolvedSet.h"
38 #include "clang/Basic/AttrKinds.h"
39 #include "clang/Basic/ExceptionSpecificationType.h"
40 #include "clang/Basic/IdentifierTable.h"
41 #include "clang/Basic/LLVM.h"
42 #include "clang/Basic/Lambda.h"
43 #include "clang/Basic/LangOptions.h"
44 #include "clang/Basic/Linkage.h"
45 #include "clang/Basic/Module.h"
46 #include "clang/Basic/PragmaKinds.h"
47 #include "clang/Basic/SourceLocation.h"
48 #include "clang/Basic/Specifiers.h"
49 #include "clang/Sema/IdentifierResolver.h"
50 #include "clang/Sema/SemaDiagnostic.h"
51 #include "clang/Serialization/ASTBitCodes.h"
52 #include "clang/Serialization/ASTReader.h"
53 #include "clang/Serialization/ContinuousRangeMap.h"
54 #include "clang/Serialization/Module.h"
55 #include "llvm/ADT/DenseMap.h"
56 #include "llvm/ADT/FoldingSet.h"
57 #include "llvm/ADT/STLExtras.h"
58 #include "llvm/ADT/SmallPtrSet.h"
59 #include "llvm/ADT/SmallVector.h"
60 #include "llvm/ADT/iterator_range.h"
61 #include "llvm/Bitcode/BitstreamReader.h"
62 #include "llvm/Support/Casting.h"
63 #include "llvm/Support/ErrorHandling.h"
64 #include "llvm/Support/SaveAndRestore.h"
72 using namespace clang;
73 using namespace serialization;
75 //===----------------------------------------------------------------------===//
76 // Declaration deserialization
77 //===----------------------------------------------------------------------===//
81 class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
83 ASTRecordReader &Record;
84 ASTReader::RecordLocation Loc;
85 const DeclID ThisDeclID;
86 const SourceLocation ThisDeclLoc;
88 using RecordData = ASTReader::RecordData;
90 TypeID DeferredTypeID = 0;
91 unsigned AnonymousDeclNumber;
92 GlobalDeclID NamedDeclForTagDecl = 0;
93 IdentifierInfo *TypedefNameForLinkage = nullptr;
95 bool HasPendingBody = false;
97 ///A flag to carry the information for a decl from the entity is
98 /// used. We use it to delay the marking of the canonical decl as used until
99 /// the entire declaration is deserialized and merged.
100 bool IsDeclMarkedUsed = false;
102 uint64_t GetCurrentCursorOffset();
104 uint64_t ReadLocalOffset() {
105 uint64_t LocalOffset = Record.readInt();
106 assert(LocalOffset < Loc.Offset && "offset point after current record");
107 return LocalOffset ? Loc.Offset - LocalOffset : 0;
110 uint64_t ReadGlobalOffset() {
111 uint64_t Local = ReadLocalOffset();
112 return Local ? Record.getGlobalBitOffset(Local) : 0;
115 SourceLocation ReadSourceLocation() {
116 return Record.readSourceLocation();
119 SourceRange ReadSourceRange() {
120 return Record.readSourceRange();
123 TypeSourceInfo *GetTypeSourceInfo() {
124 return Record.getTypeSourceInfo();
127 serialization::DeclID ReadDeclID() {
128 return Record.readDeclID();
131 std::string ReadString() {
132 return Record.readString();
135 void ReadDeclIDList(SmallVectorImpl<DeclID> &IDs) {
136 for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
137 IDs.push_back(ReadDeclID());
141 return Record.readDecl();
146 return Record.readDeclAs<T>();
149 void ReadQualifierInfo(QualifierInfo &Info) {
150 Record.readQualifierInfo(Info);
153 void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name) {
154 Record.readDeclarationNameLoc(DNLoc, Name);
157 serialization::SubmoduleID readSubmoduleID() {
158 if (Record.getIdx() == Record.size())
161 return Record.getGlobalSubmoduleID(Record.readInt());
164 Module *readModule() {
165 return Record.getSubmodule(readSubmoduleID());
168 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
169 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
170 const CXXRecordDecl *D);
171 void MergeDefinitionData(CXXRecordDecl *D,
172 struct CXXRecordDecl::DefinitionData &&NewDD);
173 void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
174 void MergeDefinitionData(ObjCInterfaceDecl *D,
175 struct ObjCInterfaceDecl::DefinitionData &&NewDD);
176 void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
177 void MergeDefinitionData(ObjCProtocolDecl *D,
178 struct ObjCProtocolDecl::DefinitionData &&NewDD);
180 static DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
182 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
185 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
186 unsigned Index, NamedDecl *D);
188 /// Results from loading a RedeclarableDecl.
189 class RedeclarableResult {
191 GlobalDeclID FirstID;
195 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
196 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
198 /// Retrieve the first ID.
199 GlobalDeclID getFirstID() const { return FirstID; }
201 /// Is this declaration a key declaration?
202 bool isKeyDecl() const { return IsKeyDecl; }
204 /// Get a known declaration that this should be merged with, if
206 Decl *getKnownMergeTarget() const { return MergeWith; }
209 /// Class used to capture the result of searching for an existing
210 /// declaration of a specific kind and name, along with the ability
211 /// to update the place where this result was found (the declaration
212 /// chain hanging off an identifier or the DeclContext we searched in)
214 class FindExistingResult {
216 NamedDecl *New = nullptr;
217 NamedDecl *Existing = nullptr;
218 bool AddResult = false;
219 unsigned AnonymousDeclNumber = 0;
220 IdentifierInfo *TypedefNameForLinkage = nullptr;
223 FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
225 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
226 unsigned AnonymousDeclNumber,
227 IdentifierInfo *TypedefNameForLinkage)
228 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
229 AnonymousDeclNumber(AnonymousDeclNumber),
230 TypedefNameForLinkage(TypedefNameForLinkage) {}
232 FindExistingResult(FindExistingResult &&Other)
233 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
234 AddResult(Other.AddResult),
235 AnonymousDeclNumber(Other.AnonymousDeclNumber),
236 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
237 Other.AddResult = false;
240 FindExistingResult &operator=(FindExistingResult &&) = delete;
241 ~FindExistingResult();
243 /// Suppress the addition of this result into the known set of
245 void suppress() { AddResult = false; }
247 operator NamedDecl*() const { return Existing; }
250 operator T*() const { return dyn_cast_or_null<T>(Existing); }
253 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
255 FindExistingResult findExisting(NamedDecl *D);
258 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
259 ASTReader::RecordLocation Loc,
260 DeclID thisDeclID, SourceLocation ThisDeclLoc)
261 : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
262 ThisDeclLoc(ThisDeclLoc) {}
264 template <typename T> static
265 void AddLazySpecializations(T *D,
266 SmallVectorImpl<serialization::DeclID>& IDs) {
270 // FIXME: We should avoid this pattern of getting the ASTContext.
271 ASTContext &C = D->getASTContext();
273 auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
275 if (auto &Old = LazySpecializations) {
276 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
277 llvm::sort(IDs.begin(), IDs.end());
278 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
281 auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
282 *Result = IDs.size();
283 std::copy(IDs.begin(), IDs.end(), Result + 1);
285 LazySpecializations = Result;
288 template <typename DeclT>
289 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
290 static Decl *getMostRecentDeclImpl(...);
291 static Decl *getMostRecentDecl(Decl *D);
293 template <typename DeclT>
294 static void attachPreviousDeclImpl(ASTReader &Reader,
295 Redeclarable<DeclT> *D, Decl *Previous,
297 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
298 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
301 template <typename DeclT>
302 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
303 static void attachLatestDeclImpl(...);
304 static void attachLatestDecl(Decl *D, Decl *latest);
306 template <typename DeclT>
307 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
308 static void markIncompleteDeclChainImpl(...);
310 /// Determine whether this declaration has a pending body.
311 bool hasPendingBody() const { return HasPendingBody; }
313 void ReadFunctionDefinition(FunctionDecl *FD);
316 void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
318 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
319 ObjCCategoryDecl *Next) {
320 Cat->NextClassCategory = Next;
323 void VisitDecl(Decl *D);
324 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
325 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
326 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
327 void VisitNamedDecl(NamedDecl *ND);
328 void VisitLabelDecl(LabelDecl *LD);
329 void VisitNamespaceDecl(NamespaceDecl *D);
330 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
331 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
332 void VisitTypeDecl(TypeDecl *TD);
333 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
334 void VisitTypedefDecl(TypedefDecl *TD);
335 void VisitTypeAliasDecl(TypeAliasDecl *TD);
336 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
337 RedeclarableResult VisitTagDecl(TagDecl *TD);
338 void VisitEnumDecl(EnumDecl *ED);
339 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
340 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
341 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
342 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
343 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
344 ClassTemplateSpecializationDecl *D);
346 void VisitClassTemplateSpecializationDecl(
347 ClassTemplateSpecializationDecl *D) {
348 VisitClassTemplateSpecializationDeclImpl(D);
351 void VisitClassTemplatePartialSpecializationDecl(
352 ClassTemplatePartialSpecializationDecl *D);
353 void VisitClassScopeFunctionSpecializationDecl(
354 ClassScopeFunctionSpecializationDecl *D);
356 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
358 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
359 VisitVarTemplateSpecializationDeclImpl(D);
362 void VisitVarTemplatePartialSpecializationDecl(
363 VarTemplatePartialSpecializationDecl *D);
364 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
365 void VisitValueDecl(ValueDecl *VD);
366 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
367 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
368 void VisitDeclaratorDecl(DeclaratorDecl *DD);
369 void VisitFunctionDecl(FunctionDecl *FD);
370 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
371 void VisitCXXMethodDecl(CXXMethodDecl *D);
372 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
373 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
374 void VisitCXXConversionDecl(CXXConversionDecl *D);
375 void VisitFieldDecl(FieldDecl *FD);
376 void VisitMSPropertyDecl(MSPropertyDecl *FD);
377 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
378 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
379 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
380 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
381 void VisitParmVarDecl(ParmVarDecl *PD);
382 void VisitDecompositionDecl(DecompositionDecl *DD);
383 void VisitBindingDecl(BindingDecl *BD);
384 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
385 DeclID VisitTemplateDecl(TemplateDecl *D);
386 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
387 void VisitClassTemplateDecl(ClassTemplateDecl *D);
388 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
389 void VisitVarTemplateDecl(VarTemplateDecl *D);
390 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
391 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
392 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
393 void VisitUsingDecl(UsingDecl *D);
394 void VisitUsingPackDecl(UsingPackDecl *D);
395 void VisitUsingShadowDecl(UsingShadowDecl *D);
396 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
397 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
398 void VisitExportDecl(ExportDecl *D);
399 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
400 void VisitImportDecl(ImportDecl *D);
401 void VisitAccessSpecDecl(AccessSpecDecl *D);
402 void VisitFriendDecl(FriendDecl *D);
403 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
404 void VisitStaticAssertDecl(StaticAssertDecl *D);
405 void VisitBlockDecl(BlockDecl *BD);
406 void VisitCapturedDecl(CapturedDecl *CD);
407 void VisitEmptyDecl(EmptyDecl *D);
409 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
412 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
415 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
416 DeclID TemplatePatternID = 0);
419 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
420 RedeclarableResult &Redecl,
421 DeclID TemplatePatternID = 0);
424 void mergeMergeable(Mergeable<T> *D);
426 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
427 RedeclarableTemplateDecl *Existing,
428 DeclID DsID, bool IsKeyDecl);
430 ObjCTypeParamList *ReadObjCTypeParamList();
432 // FIXME: Reorder according to DeclNodes.td?
433 void VisitObjCMethodDecl(ObjCMethodDecl *D);
434 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
435 void VisitObjCContainerDecl(ObjCContainerDecl *D);
436 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
437 void VisitObjCIvarDecl(ObjCIvarDecl *D);
438 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
439 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
440 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
441 void VisitObjCImplDecl(ObjCImplDecl *D);
442 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
443 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
444 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
445 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
446 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
447 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
448 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
449 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
456 /// Iterator over the redeclarations of a declaration that have already
457 /// been merged into the same redeclaration chain.
458 template<typename DeclT>
459 class MergedRedeclIterator {
461 DeclT *Canonical = nullptr;
462 DeclT *Current = nullptr;
465 MergedRedeclIterator() = default;
466 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
468 DeclT *operator*() { return Current; }
470 MergedRedeclIterator &operator++() {
471 if (Current->isFirstDecl()) {
473 Current = Current->getMostRecentDecl();
475 Current = Current->getPreviousDecl();
477 // If we started in the merged portion, we'll reach our start position
478 // eventually. Otherwise, we'll never reach it, but the second declaration
479 // we reached was the canonical declaration, so stop when we see that one
481 if (Current == Start || Current == Canonical)
486 friend bool operator!=(const MergedRedeclIterator &A,
487 const MergedRedeclIterator &B) {
488 return A.Current != B.Current;
494 template <typename DeclT>
495 static llvm::iterator_range<MergedRedeclIterator<DeclT>>
496 merged_redecls(DeclT *D) {
497 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
498 MergedRedeclIterator<DeclT>());
501 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
502 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
505 void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
506 if (Record.readInt())
507 Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
508 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
509 CD->NumCtorInitializers = Record.readInt();
510 if (CD->NumCtorInitializers)
511 CD->CtorInitializers = ReadGlobalOffset();
513 // Store the offset of the body so we can lazily load it later.
514 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
515 HasPendingBody = true;
518 void ASTDeclReader::Visit(Decl *D) {
519 DeclVisitor<ASTDeclReader, void>::Visit(D);
521 // At this point we have deserialized and merged the decl and it is safe to
522 // update its canonical decl to signal that the entire entity is used.
523 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
524 IsDeclMarkedUsed = false;
526 if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
527 if (auto *TInfo = DD->getTypeSourceInfo())
528 Record.readTypeLoc(TInfo->getTypeLoc());
531 if (auto *TD = dyn_cast<TypeDecl>(D)) {
532 // We have a fully initialized TypeDecl. Read its type now.
533 TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
535 // If this is a tag declaration with a typedef name for linkage, it's safe
536 // to load that typedef now.
537 if (NamedDeclForTagDecl)
538 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
539 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
540 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
541 // if we have a fully initialized TypeDecl, we can safely read its type now.
542 ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
543 } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
545 FD->setType(Reader.GetType(DeferredTypeID));
547 // FunctionDecl's body was written last after all other Stmts/Exprs.
548 // We only read it if FD doesn't already have a body (e.g., from another
550 // FIXME: Can we diagnose ODR violations somehow?
551 if (Record.readInt())
552 ReadFunctionDefinition(FD);
556 void ASTDeclReader::VisitDecl(Decl *D) {
557 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
558 isa<ParmVarDecl>(D)) {
559 // We don't want to deserialize the DeclContext of a template
560 // parameter or of a parameter of a function template immediately. These
561 // entities might be used in the formulation of its DeclContext (for
562 // example, a function parameter can be used in decltype() in trailing
563 // return type of the function). Use the translation unit DeclContext as a
565 GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID();
566 GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID();
567 if (!LexicalDCIDForTemplateParmDecl)
568 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
569 Reader.addPendingDeclContextInfo(D,
570 SemaDCIDForTemplateParmDecl,
571 LexicalDCIDForTemplateParmDecl);
572 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
574 auto *SemaDC = ReadDeclAs<DeclContext>();
575 auto *LexicalDC = ReadDeclAs<DeclContext>();
578 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
579 // Avoid calling setLexicalDeclContext() directly because it uses
580 // Decl::getASTContext() internally which is unsafe during derialization.
581 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
582 Reader.getContext());
584 D->setLocation(ThisDeclLoc);
585 D->setInvalidDecl(Record.readInt());
586 if (Record.readInt()) { // hasAttrs
588 Record.readAttributes(Attrs);
589 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
590 // internally which is unsafe during derialization.
591 D->setAttrsImpl(Attrs, Reader.getContext());
593 D->setImplicit(Record.readInt());
594 D->Used = Record.readInt();
595 IsDeclMarkedUsed |= D->Used;
596 D->setReferenced(Record.readInt());
597 D->setTopLevelDeclInObjCContainer(Record.readInt());
598 D->setAccess((AccessSpecifier)Record.readInt());
599 D->FromASTFile = true;
600 bool ModulePrivate = Record.readInt();
602 // Determine whether this declaration is part of a (sub)module. If so, it
603 // may not yet be visible.
604 if (unsigned SubmoduleID = readSubmoduleID()) {
605 // Store the owning submodule ID in the declaration.
606 D->setModuleOwnershipKind(
607 ModulePrivate ? Decl::ModuleOwnershipKind::ModulePrivate
608 : Decl::ModuleOwnershipKind::VisibleWhenImported);
609 D->setOwningModuleID(SubmoduleID);
612 // Module-private declarations are never visible, so there is no work to
614 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
615 // If local visibility is being tracked, this declaration will become
616 // hidden and visible as the owning module does.
617 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
618 // Mark the declaration as visible when its owning module becomes visible.
619 if (Owner->NameVisibility == Module::AllVisible)
620 D->setVisibleDespiteOwningModule();
622 Reader.HiddenNamesMap[Owner].push_back(D);
624 } else if (ModulePrivate) {
625 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
629 void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
631 D->setLocation(ReadSourceLocation());
632 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
633 std::string Arg = ReadString();
634 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
635 D->getTrailingObjects<char>()[Arg.size()] = '\0';
638 void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
640 D->setLocation(ReadSourceLocation());
641 std::string Name = ReadString();
642 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
643 D->getTrailingObjects<char>()[Name.size()] = '\0';
645 D->ValueStart = Name.size() + 1;
646 std::string Value = ReadString();
647 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
649 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
652 void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
653 llvm_unreachable("Translation units are not serialized");
656 void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
658 ND->setDeclName(Record.readDeclarationName());
659 AnonymousDeclNumber = Record.readInt();
662 void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
664 TD->setLocStart(ReadSourceLocation());
665 // Delay type reading until after we have fully initialized the decl.
666 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
669 ASTDeclReader::RedeclarableResult
670 ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
671 RedeclarableResult Redecl = VisitRedeclarable(TD);
673 TypeSourceInfo *TInfo = GetTypeSourceInfo();
674 if (Record.readInt()) { // isModed
675 QualType modedT = Record.readType();
676 TD->setModedTypeSourceInfo(TInfo, modedT);
678 TD->setTypeSourceInfo(TInfo);
679 // Read and discard the declaration for which this is a typedef name for
680 // linkage, if it exists. We cannot rely on our type to pull in this decl,
681 // because it might have been merged with a type from another module and
682 // thus might not refer to our version of the declaration.
687 void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
688 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
689 mergeRedeclarable(TD, Redecl);
692 void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
693 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
694 if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>())
695 // Merged when we merge the template.
696 TD->setDescribedAliasTemplate(Template);
698 mergeRedeclarable(TD, Redecl);
701 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
702 RedeclarableResult Redecl = VisitRedeclarable(TD);
705 TD->IdentifierNamespace = Record.readInt();
706 TD->setTagKind((TagDecl::TagKind)Record.readInt());
707 if (!isa<CXXRecordDecl>(TD))
708 TD->setCompleteDefinition(Record.readInt());
709 TD->setEmbeddedInDeclarator(Record.readInt());
710 TD->setFreeStanding(Record.readInt());
711 TD->setCompleteDefinitionRequired(Record.readInt());
712 TD->setBraceRange(ReadSourceRange());
714 switch (Record.readInt()) {
718 auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
719 ReadQualifierInfo(*Info);
720 TD->TypedefNameDeclOrQualifier = Info;
723 case 2: // TypedefNameForAnonDecl
724 NamedDeclForTagDecl = ReadDeclID();
725 TypedefNameForLinkage = Record.getIdentifierInfo();
728 llvm_unreachable("unexpected tag info kind");
731 if (!isa<CXXRecordDecl>(TD))
732 mergeRedeclarable(TD, Redecl);
736 void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
738 if (TypeSourceInfo *TI = GetTypeSourceInfo())
739 ED->setIntegerTypeSourceInfo(TI);
741 ED->setIntegerType(Record.readType());
742 ED->setPromotionType(Record.readType());
743 ED->setNumPositiveBits(Record.readInt());
744 ED->setNumNegativeBits(Record.readInt());
745 ED->IsScoped = Record.readInt();
746 ED->IsScopedUsingClassTag = Record.readInt();
747 ED->IsFixed = Record.readInt();
749 ED->HasODRHash = true;
750 ED->ODRHash = Record.readInt();
752 // If this is a definition subject to the ODR, and we already have a
753 // definition, merge this one into it.
754 if (ED->IsCompleteDefinition &&
755 Reader.getContext().getLangOpts().Modules &&
756 Reader.getContext().getLangOpts().CPlusPlus) {
757 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
759 // This is the first time we've seen an imported definition. Look for a
760 // local definition before deciding that we are the first definition.
761 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
762 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
769 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
770 ED->IsCompleteDefinition = false;
771 Reader.mergeDefinitionVisibility(OldDef, ED);
772 if (OldDef->getODRHash() != ED->getODRHash())
773 Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
779 if (auto *InstED = ReadDeclAs<EnumDecl>()) {
780 auto TSK = (TemplateSpecializationKind)Record.readInt();
781 SourceLocation POI = ReadSourceLocation();
782 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
783 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
787 ASTDeclReader::RedeclarableResult
788 ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
789 RedeclarableResult Redecl = VisitTagDecl(RD);
790 RD->setHasFlexibleArrayMember(Record.readInt());
791 RD->setAnonymousStructOrUnion(Record.readInt());
792 RD->setHasObjectMember(Record.readInt());
793 RD->setHasVolatileMember(Record.readInt());
794 RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
795 RD->setNonTrivialToPrimitiveCopy(Record.readInt());
796 RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
797 RD->setParamDestroyedInCallee(Record.readInt());
798 RD->setArgPassingRestrictions((RecordDecl::ArgPassingKind)Record.readInt());
802 void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
804 // For function declarations, defer reading the type in case the function has
805 // a deduced return type that references an entity declared within the
807 if (isa<FunctionDecl>(VD))
808 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
810 VD->setType(Record.readType());
813 void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
815 if (Record.readInt())
816 ECD->setInitExpr(Record.readExpr());
817 ECD->setInitVal(Record.readAPSInt());
821 void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
823 DD->setInnerLocStart(ReadSourceLocation());
824 if (Record.readInt()) { // hasExtInfo
825 auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
826 ReadQualifierInfo(*Info);
829 QualType TSIType = Record.readType();
830 DD->setTypeSourceInfo(
831 TSIType.isNull() ? nullptr
832 : Reader.getContext().CreateTypeSourceInfo(TSIType));
835 void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
836 RedeclarableResult Redecl = VisitRedeclarable(FD);
837 VisitDeclaratorDecl(FD);
839 // Attach a type to this function. Use the real type if possible, but fall
840 // back to the type as written if it involves a deduced return type.
841 if (FD->getTypeSourceInfo() &&
842 FD->getTypeSourceInfo()->getType()->castAs<FunctionType>()
843 ->getReturnType()->getContainedAutoType()) {
844 // We'll set up the real type in Visit, once we've finished loading the
846 FD->setType(FD->getTypeSourceInfo()->getType());
848 FD->setType(Reader.GetType(DeferredTypeID));
852 ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName());
853 FD->IdentifierNamespace = Record.readInt();
855 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
856 // after everything else is read.
858 FD->SClass = (StorageClass)Record.readInt();
859 FD->IsInline = Record.readInt();
860 FD->IsInlineSpecified = Record.readInt();
861 FD->IsExplicitSpecified = Record.readInt();
862 FD->IsVirtualAsWritten = Record.readInt();
863 FD->IsPure = Record.readInt();
864 FD->HasInheritedPrototype = Record.readInt();
865 FD->HasWrittenPrototype = Record.readInt();
866 FD->IsDeleted = Record.readInt();
867 FD->IsTrivial = Record.readInt();
868 FD->IsTrivialForCall = Record.readInt();
869 FD->IsDefaulted = Record.readInt();
870 FD->IsExplicitlyDefaulted = Record.readInt();
871 FD->HasImplicitReturnZero = Record.readInt();
872 FD->IsConstexpr = Record.readInt();
873 FD->UsesSEHTry = Record.readInt();
874 FD->HasSkippedBody = Record.readInt();
875 FD->IsMultiVersion = Record.readInt();
876 FD->IsLateTemplateParsed = Record.readInt();
877 FD->setCachedLinkage(Linkage(Record.readInt()));
878 FD->EndRangeLoc = ReadSourceLocation();
880 FD->ODRHash = Record.readInt();
881 FD->HasODRHash = true;
883 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
884 case FunctionDecl::TK_NonTemplate:
885 mergeRedeclarable(FD, Redecl);
887 case FunctionDecl::TK_FunctionTemplate:
888 // Merged when we merge the template.
889 FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
891 case FunctionDecl::TK_MemberSpecialization: {
892 auto *InstFD = ReadDeclAs<FunctionDecl>();
893 auto TSK = (TemplateSpecializationKind)Record.readInt();
894 SourceLocation POI = ReadSourceLocation();
895 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
896 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
897 mergeRedeclarable(FD, Redecl);
900 case FunctionDecl::TK_FunctionTemplateSpecialization: {
901 auto *Template = ReadDeclAs<FunctionTemplateDecl>();
902 auto TSK = (TemplateSpecializationKind)Record.readInt();
904 // Template arguments.
905 SmallVector<TemplateArgument, 8> TemplArgs;
906 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
908 // Template args as written.
909 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
910 SourceLocation LAngleLoc, RAngleLoc;
911 bool HasTemplateArgumentsAsWritten = Record.readInt();
912 if (HasTemplateArgumentsAsWritten) {
913 unsigned NumTemplateArgLocs = Record.readInt();
914 TemplArgLocs.reserve(NumTemplateArgLocs);
915 for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
916 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
918 LAngleLoc = ReadSourceLocation();
919 RAngleLoc = ReadSourceLocation();
922 SourceLocation POI = ReadSourceLocation();
924 ASTContext &C = Reader.getContext();
925 TemplateArgumentList *TemplArgList
926 = TemplateArgumentList::CreateCopy(C, TemplArgs);
927 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
928 for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
929 TemplArgsInfo.addArgument(TemplArgLocs[i]);
930 FunctionTemplateSpecializationInfo *FTInfo
931 = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
933 HasTemplateArgumentsAsWritten ? &TemplArgsInfo
936 FD->TemplateOrSpecialization = FTInfo;
938 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
939 // The template that contains the specializations set. It's not safe to
940 // use getCanonicalDecl on Template since it may still be initializing.
941 auto *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
942 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
943 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
944 // FunctionTemplateSpecializationInfo's Profile().
945 // We avoid getASTContext because a decl in the parent hierarchy may
947 llvm::FoldingSetNodeID ID;
948 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
949 void *InsertPos = nullptr;
950 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
951 FunctionTemplateSpecializationInfo *ExistingInfo =
952 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
954 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
956 assert(Reader.getContext().getLangOpts().Modules &&
957 "already deserialized this template specialization");
958 mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
963 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
965 UnresolvedSet<8> TemplDecls;
966 unsigned NumTemplates = Record.readInt();
967 while (NumTemplates--)
968 TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
971 TemplateArgumentListInfo TemplArgs;
972 unsigned NumArgs = Record.readInt();
974 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
975 TemplArgs.setLAngleLoc(ReadSourceLocation());
976 TemplArgs.setRAngleLoc(ReadSourceLocation());
978 FD->setDependentTemplateSpecialization(Reader.getContext(),
979 TemplDecls, TemplArgs);
980 // These are not merged; we don't need to merge redeclarations of dependent
986 // Read in the parameters.
987 unsigned NumParams = Record.readInt();
988 SmallVector<ParmVarDecl *, 16> Params;
989 Params.reserve(NumParams);
990 for (unsigned I = 0; I != NumParams; ++I)
991 Params.push_back(ReadDeclAs<ParmVarDecl>());
992 FD->setParams(Reader.getContext(), Params);
995 void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
997 if (Record.readInt()) {
998 // Load the body on-demand. Most clients won't care, because method
999 // definitions rarely show up in headers.
1000 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1001 HasPendingBody = true;
1002 MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
1003 MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
1005 MD->setInstanceMethod(Record.readInt());
1006 MD->setVariadic(Record.readInt());
1007 MD->setPropertyAccessor(Record.readInt());
1008 MD->setDefined(Record.readInt());
1009 MD->IsOverriding = Record.readInt();
1010 MD->HasSkippedBody = Record.readInt();
1012 MD->IsRedeclaration = Record.readInt();
1013 MD->HasRedeclaration = Record.readInt();
1014 if (MD->HasRedeclaration)
1015 Reader.getContext().setObjCMethodRedeclaration(MD,
1016 ReadDeclAs<ObjCMethodDecl>());
1018 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
1019 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1020 MD->SetRelatedResultType(Record.readInt());
1021 MD->setReturnType(Record.readType());
1022 MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
1023 MD->DeclEndLoc = ReadSourceLocation();
1024 unsigned NumParams = Record.readInt();
1025 SmallVector<ParmVarDecl *, 16> Params;
1026 Params.reserve(NumParams);
1027 for (unsigned I = 0; I != NumParams; ++I)
1028 Params.push_back(ReadDeclAs<ParmVarDecl>());
1030 MD->SelLocsKind = Record.readInt();
1031 unsigned NumStoredSelLocs = Record.readInt();
1032 SmallVector<SourceLocation, 16> SelLocs;
1033 SelLocs.reserve(NumStoredSelLocs);
1034 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1035 SelLocs.push_back(ReadSourceLocation());
1037 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1040 void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1041 VisitTypedefNameDecl(D);
1043 D->Variance = Record.readInt();
1044 D->Index = Record.readInt();
1045 D->VarianceLoc = ReadSourceLocation();
1046 D->ColonLoc = ReadSourceLocation();
1049 void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
1051 CD->setAtStartLoc(ReadSourceLocation());
1052 CD->setAtEndRange(ReadSourceRange());
1055 ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
1056 unsigned numParams = Record.readInt();
1060 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
1061 typeParams.reserve(numParams);
1062 for (unsigned i = 0; i != numParams; ++i) {
1063 auto *typeParam = ReadDeclAs<ObjCTypeParamDecl>();
1067 typeParams.push_back(typeParam);
1070 SourceLocation lAngleLoc = ReadSourceLocation();
1071 SourceLocation rAngleLoc = ReadSourceLocation();
1073 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1074 typeParams, rAngleLoc);
1077 void ASTDeclReader::ReadObjCDefinitionData(
1078 struct ObjCInterfaceDecl::DefinitionData &Data) {
1079 // Read the superclass.
1080 Data.SuperClassTInfo = GetTypeSourceInfo();
1082 Data.EndLoc = ReadSourceLocation();
1083 Data.HasDesignatedInitializers = Record.readInt();
1085 // Read the directly referenced protocols and their SourceLocations.
1086 unsigned NumProtocols = Record.readInt();
1087 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1088 Protocols.reserve(NumProtocols);
1089 for (unsigned I = 0; I != NumProtocols; ++I)
1090 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1091 SmallVector<SourceLocation, 16> ProtoLocs;
1092 ProtoLocs.reserve(NumProtocols);
1093 for (unsigned I = 0; I != NumProtocols; ++I)
1094 ProtoLocs.push_back(ReadSourceLocation());
1095 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1096 Reader.getContext());
1098 // Read the transitive closure of protocols referenced by this class.
1099 NumProtocols = Record.readInt();
1101 Protocols.reserve(NumProtocols);
1102 for (unsigned I = 0; I != NumProtocols; ++I)
1103 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1104 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1105 Reader.getContext());
1108 void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1109 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1110 // FIXME: odr checking?
1113 void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1114 RedeclarableResult Redecl = VisitRedeclarable(ID);
1115 VisitObjCContainerDecl(ID);
1116 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1117 mergeRedeclarable(ID, Redecl);
1119 ID->TypeParamList = ReadObjCTypeParamList();
1120 if (Record.readInt()) {
1121 // Read the definition.
1122 ID->allocateDefinitionData();
1124 ReadObjCDefinitionData(ID->data());
1125 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1126 if (Canon->Data.getPointer()) {
1127 // If we already have a definition, keep the definition invariant and
1129 MergeDefinitionData(Canon, std::move(ID->data()));
1130 ID->Data = Canon->Data;
1132 // Set the definition data of the canonical declaration, so other
1133 // redeclarations will see it.
1134 ID->getCanonicalDecl()->Data = ID->Data;
1136 // We will rebuild this list lazily.
1137 ID->setIvarList(nullptr);
1140 // Note that we have deserialized a definition.
1141 Reader.PendingDefinitions.insert(ID);
1143 // Note that we've loaded this Objective-C class.
1144 Reader.ObjCClassesLoaded.push_back(ID);
1146 ID->Data = ID->getCanonicalDecl()->Data;
1150 void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1151 VisitFieldDecl(IVD);
1152 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1153 // This field will be built lazily.
1154 IVD->setNextIvar(nullptr);
1155 bool synth = Record.readInt();
1156 IVD->setSynthesize(synth);
1159 void ASTDeclReader::ReadObjCDefinitionData(
1160 struct ObjCProtocolDecl::DefinitionData &Data) {
1161 unsigned NumProtoRefs = Record.readInt();
1162 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1163 ProtoRefs.reserve(NumProtoRefs);
1164 for (unsigned I = 0; I != NumProtoRefs; ++I)
1165 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1166 SmallVector<SourceLocation, 16> ProtoLocs;
1167 ProtoLocs.reserve(NumProtoRefs);
1168 for (unsigned I = 0; I != NumProtoRefs; ++I)
1169 ProtoLocs.push_back(ReadSourceLocation());
1170 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1171 ProtoLocs.data(), Reader.getContext());
1174 void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1175 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1176 // FIXME: odr checking?
1179 void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1180 RedeclarableResult Redecl = VisitRedeclarable(PD);
1181 VisitObjCContainerDecl(PD);
1182 mergeRedeclarable(PD, Redecl);
1184 if (Record.readInt()) {
1185 // Read the definition.
1186 PD->allocateDefinitionData();
1188 ReadObjCDefinitionData(PD->data());
1190 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1191 if (Canon->Data.getPointer()) {
1192 // If we already have a definition, keep the definition invariant and
1194 MergeDefinitionData(Canon, std::move(PD->data()));
1195 PD->Data = Canon->Data;
1197 // Set the definition data of the canonical declaration, so other
1198 // redeclarations will see it.
1199 PD->getCanonicalDecl()->Data = PD->Data;
1201 // Note that we have deserialized a definition.
1202 Reader.PendingDefinitions.insert(PD);
1204 PD->Data = PD->getCanonicalDecl()->Data;
1208 void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1212 void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1213 VisitObjCContainerDecl(CD);
1214 CD->setCategoryNameLoc(ReadSourceLocation());
1215 CD->setIvarLBraceLoc(ReadSourceLocation());
1216 CD->setIvarRBraceLoc(ReadSourceLocation());
1218 // Note that this category has been deserialized. We do this before
1219 // deserializing the interface declaration, so that it will consider this
1221 Reader.CategoriesDeserialized.insert(CD);
1223 CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1224 CD->TypeParamList = ReadObjCTypeParamList();
1225 unsigned NumProtoRefs = Record.readInt();
1226 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1227 ProtoRefs.reserve(NumProtoRefs);
1228 for (unsigned I = 0; I != NumProtoRefs; ++I)
1229 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1230 SmallVector<SourceLocation, 16> ProtoLocs;
1231 ProtoLocs.reserve(NumProtoRefs);
1232 for (unsigned I = 0; I != NumProtoRefs; ++I)
1233 ProtoLocs.push_back(ReadSourceLocation());
1234 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1235 Reader.getContext());
1237 // Protocols in the class extension belong to the class.
1238 if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1239 CD->ClassInterface->mergeClassExtensionProtocolList(
1240 (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1241 Reader.getContext());
1244 void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1245 VisitNamedDecl(CAD);
1246 CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1249 void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1251 D->setAtLoc(ReadSourceLocation());
1252 D->setLParenLoc(ReadSourceLocation());
1253 QualType T = Record.readType();
1254 TypeSourceInfo *TSI = GetTypeSourceInfo();
1256 D->setPropertyAttributes(
1257 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1258 D->setPropertyAttributesAsWritten(
1259 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1260 D->setPropertyImplementation(
1261 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1262 DeclarationName GetterName = Record.readDeclarationName();
1263 SourceLocation GetterLoc = ReadSourceLocation();
1264 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1265 DeclarationName SetterName = Record.readDeclarationName();
1266 SourceLocation SetterLoc = ReadSourceLocation();
1267 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1268 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1269 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1270 D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1273 void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1274 VisitObjCContainerDecl(D);
1275 D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1278 void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1279 VisitObjCImplDecl(D);
1280 D->CategoryNameLoc = ReadSourceLocation();
1283 void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1284 VisitObjCImplDecl(D);
1285 D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1286 D->SuperLoc = ReadSourceLocation();
1287 D->setIvarLBraceLoc(ReadSourceLocation());
1288 D->setIvarRBraceLoc(ReadSourceLocation());
1289 D->setHasNonZeroConstructors(Record.readInt());
1290 D->setHasDestructors(Record.readInt());
1291 D->NumIvarInitializers = Record.readInt();
1292 if (D->NumIvarInitializers)
1293 D->IvarInitializers = ReadGlobalOffset();
1296 void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1298 D->setAtLoc(ReadSourceLocation());
1299 D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1300 D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1301 D->IvarLoc = ReadSourceLocation();
1302 D->setGetterCXXConstructor(Record.readExpr());
1303 D->setSetterCXXAssignment(Record.readExpr());
1306 void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1307 VisitDeclaratorDecl(FD);
1308 FD->Mutable = Record.readInt();
1310 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1311 FD->InitStorage.setInt(ISK);
1312 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1313 ? Record.readType().getAsOpaquePtr()
1314 : Record.readExpr());
1317 if (auto *BW = Record.readExpr())
1318 FD->setBitWidth(BW);
1320 if (!FD->getDeclName()) {
1321 if (auto *Tmpl = ReadDeclAs<FieldDecl>())
1322 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1327 void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1328 VisitDeclaratorDecl(PD);
1329 PD->GetterId = Record.getIdentifierInfo();
1330 PD->SetterId = Record.getIdentifierInfo();
1333 void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1336 FD->ChainingSize = Record.readInt();
1337 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1338 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1340 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1341 FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1346 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1347 RedeclarableResult Redecl = VisitRedeclarable(VD);
1348 VisitDeclaratorDecl(VD);
1350 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1351 VD->VarDeclBits.TSCSpec = Record.readInt();
1352 VD->VarDeclBits.InitStyle = Record.readInt();
1353 if (!isa<ParmVarDecl>(VD)) {
1354 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1356 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1357 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1358 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1359 VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1360 VD->NonParmVarDeclBits.ARCPseudoStrong = Record.readInt();
1361 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1362 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1363 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1364 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1365 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1366 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1368 auto VarLinkage = Linkage(Record.readInt());
1369 VD->setCachedLinkage(VarLinkage);
1371 // Reconstruct the one piece of the IdentifierNamespace that we need.
1372 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1373 VD->getLexicalDeclContext()->isFunctionOrMethod())
1374 VD->setLocalExternDecl();
1376 if (uint64_t Val = Record.readInt()) {
1377 VD->setInit(Record.readExpr());
1378 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1379 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1380 Eval->CheckedICE = true;
1381 Eval->IsICE = Val == 3;
1385 if (VD->getStorageDuration() == SD_Static && Record.readInt())
1386 Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1389 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1391 switch ((VarKind)Record.readInt()) {
1392 case VarNotTemplate:
1393 // Only true variables (not parameters or implicit parameters) can be
1394 // merged; the other kinds are not really redeclarable at all.
1395 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1396 !isa<VarTemplateSpecializationDecl>(VD))
1397 mergeRedeclarable(VD, Redecl);
1400 // Merged when we merge the template.
1401 VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1403 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1404 auto *Tmpl = ReadDeclAs<VarDecl>();
1405 auto TSK = (TemplateSpecializationKind)Record.readInt();
1406 SourceLocation POI = ReadSourceLocation();
1407 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1408 mergeRedeclarable(VD, Redecl);
1416 void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1420 void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1422 unsigned isObjCMethodParam = Record.readInt();
1423 unsigned scopeDepth = Record.readInt();
1424 unsigned scopeIndex = Record.readInt();
1425 unsigned declQualifier = Record.readInt();
1426 if (isObjCMethodParam) {
1427 assert(scopeDepth == 0);
1428 PD->setObjCMethodScopeInfo(scopeIndex);
1429 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1431 PD->setScopeInfo(scopeDepth, scopeIndex);
1433 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1434 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1435 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1436 PD->setUninstantiatedDefaultArg(Record.readExpr());
1438 // FIXME: If this is a redeclaration of a function from another module, handle
1439 // inheritance of default arguments.
1442 void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1444 auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1445 for (unsigned I = 0; I != DD->NumBindings; ++I)
1446 BDs[I] = ReadDeclAs<BindingDecl>();
1449 void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1451 BD->Binding = Record.readExpr();
1454 void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1456 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1457 AD->setRParenLoc(ReadSourceLocation());
1460 void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1462 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1463 BD->setSignatureAsWritten(GetTypeSourceInfo());
1464 unsigned NumParams = Record.readInt();
1465 SmallVector<ParmVarDecl *, 16> Params;
1466 Params.reserve(NumParams);
1467 for (unsigned I = 0; I != NumParams; ++I)
1468 Params.push_back(ReadDeclAs<ParmVarDecl>());
1469 BD->setParams(Params);
1471 BD->setIsVariadic(Record.readInt());
1472 BD->setBlockMissingReturnType(Record.readInt());
1473 BD->setIsConversionFromLambda(Record.readInt());
1475 bool capturesCXXThis = Record.readInt();
1476 unsigned numCaptures = Record.readInt();
1477 SmallVector<BlockDecl::Capture, 16> captures;
1478 captures.reserve(numCaptures);
1479 for (unsigned i = 0; i != numCaptures; ++i) {
1480 auto *decl = ReadDeclAs<VarDecl>();
1481 unsigned flags = Record.readInt();
1482 bool byRef = (flags & 1);
1483 bool nested = (flags & 2);
1484 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1486 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1488 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1491 void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1493 unsigned ContextParamPos = Record.readInt();
1494 CD->setNothrow(Record.readInt() != 0);
1495 // Body is set by VisitCapturedStmt.
1496 for (unsigned I = 0; I < CD->NumParams; ++I) {
1497 if (I != ContextParamPos)
1498 CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1500 CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1504 void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1506 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1507 D->setExternLoc(ReadSourceLocation());
1508 D->setRBraceLoc(ReadSourceLocation());
1511 void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1513 D->RBraceLoc = ReadSourceLocation();
1516 void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1518 D->setLocStart(ReadSourceLocation());
1521 void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1522 RedeclarableResult Redecl = VisitRedeclarable(D);
1524 D->setInline(Record.readInt());
1525 D->LocStart = ReadSourceLocation();
1526 D->RBraceLoc = ReadSourceLocation();
1528 // Defer loading the anonymous namespace until we've finished merging
1529 // this namespace; loading it might load a later declaration of the
1530 // same namespace, and we have an invariant that older declarations
1531 // get merged before newer ones try to merge.
1532 GlobalDeclID AnonNamespace = 0;
1533 if (Redecl.getFirstID() == ThisDeclID) {
1534 AnonNamespace = ReadDeclID();
1536 // Link this namespace back to the first declaration, which has already
1537 // been deserialized.
1538 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1541 mergeRedeclarable(D, Redecl);
1543 if (AnonNamespace) {
1544 // Each module has its own anonymous namespace, which is disjoint from
1545 // any other module's anonymous namespaces, so don't attach the anonymous
1546 // namespace at all.
1547 auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1548 if (!Record.isModule())
1549 D->setAnonymousNamespace(Anon);
1553 void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1554 RedeclarableResult Redecl = VisitRedeclarable(D);
1556 D->NamespaceLoc = ReadSourceLocation();
1557 D->IdentLoc = ReadSourceLocation();
1558 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1559 D->Namespace = ReadDeclAs<NamedDecl>();
1560 mergeRedeclarable(D, Redecl);
1563 void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1565 D->setUsingLoc(ReadSourceLocation());
1566 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1567 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1568 D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1569 D->setTypename(Record.readInt());
1570 if (auto *Pattern = ReadDeclAs<NamedDecl>())
1571 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1575 void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1577 D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1578 auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1579 for (unsigned I = 0; I != D->NumExpansions; ++I)
1580 Expansions[I] = ReadDeclAs<NamedDecl>();
1584 void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1585 RedeclarableResult Redecl = VisitRedeclarable(D);
1587 D->Underlying = ReadDeclAs<NamedDecl>();
1588 D->IdentifierNamespace = Record.readInt();
1589 D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1590 auto *Pattern = ReadDeclAs<UsingShadowDecl>();
1592 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1593 mergeRedeclarable(D, Redecl);
1596 void ASTDeclReader::VisitConstructorUsingShadowDecl(
1597 ConstructorUsingShadowDecl *D) {
1598 VisitUsingShadowDecl(D);
1599 D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1600 D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1601 D->IsVirtual = Record.readInt();
1604 void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1606 D->UsingLoc = ReadSourceLocation();
1607 D->NamespaceLoc = ReadSourceLocation();
1608 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1609 D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1610 D->CommonAncestor = ReadDeclAs<DeclContext>();
1613 void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1615 D->setUsingLoc(ReadSourceLocation());
1616 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1617 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1618 D->EllipsisLoc = ReadSourceLocation();
1622 void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1623 UnresolvedUsingTypenameDecl *D) {
1625 D->TypenameLocation = ReadSourceLocation();
1626 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1627 D->EllipsisLoc = ReadSourceLocation();
1631 void ASTDeclReader::ReadCXXDefinitionData(
1632 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1633 // Note: the caller has deserialized the IsLambda bit already.
1634 Data.UserDeclaredConstructor = Record.readInt();
1635 Data.UserDeclaredSpecialMembers = Record.readInt();
1636 Data.Aggregate = Record.readInt();
1637 Data.PlainOldData = Record.readInt();
1638 Data.Empty = Record.readInt();
1639 Data.Polymorphic = Record.readInt();
1640 Data.Abstract = Record.readInt();
1641 Data.IsStandardLayout = Record.readInt();
1642 Data.IsCXX11StandardLayout = Record.readInt();
1643 Data.HasBasesWithFields = Record.readInt();
1644 Data.HasBasesWithNonStaticDataMembers = Record.readInt();
1645 Data.HasPrivateFields = Record.readInt();
1646 Data.HasProtectedFields = Record.readInt();
1647 Data.HasPublicFields = Record.readInt();
1648 Data.HasMutableFields = Record.readInt();
1649 Data.HasVariantMembers = Record.readInt();
1650 Data.HasOnlyCMembers = Record.readInt();
1651 Data.HasInClassInitializer = Record.readInt();
1652 Data.HasUninitializedReferenceMember = Record.readInt();
1653 Data.HasUninitializedFields = Record.readInt();
1654 Data.HasInheritedConstructor = Record.readInt();
1655 Data.HasInheritedAssignment = Record.readInt();
1656 Data.NeedOverloadResolutionForCopyConstructor = Record.readInt();
1657 Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1658 Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1659 Data.NeedOverloadResolutionForDestructor = Record.readInt();
1660 Data.DefaultedCopyConstructorIsDeleted = Record.readInt();
1661 Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1662 Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1663 Data.DefaultedDestructorIsDeleted = Record.readInt();
1664 Data.HasTrivialSpecialMembers = Record.readInt();
1665 Data.HasTrivialSpecialMembersForCall = Record.readInt();
1666 Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1667 Data.DeclaredNonTrivialSpecialMembersForCall = Record.readInt();
1668 Data.HasIrrelevantDestructor = Record.readInt();
1669 Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1670 Data.HasDefaultedDefaultConstructor = Record.readInt();
1671 Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1672 Data.HasConstexprDefaultConstructor = Record.readInt();
1673 Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1674 Data.ComputedVisibleConversions = Record.readInt();
1675 Data.UserProvidedDefaultConstructor = Record.readInt();
1676 Data.DeclaredSpecialMembers = Record.readInt();
1677 Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1678 Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1679 Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1680 Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1681 Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1682 Data.ODRHash = Record.readInt();
1683 Data.HasODRHash = true;
1685 if (Record.readInt())
1686 Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1688 Data.NumBases = Record.readInt();
1690 Data.Bases = ReadGlobalOffset();
1691 Data.NumVBases = Record.readInt();
1693 Data.VBases = ReadGlobalOffset();
1695 Record.readUnresolvedSet(Data.Conversions);
1696 Record.readUnresolvedSet(Data.VisibleConversions);
1697 assert(Data.Definition && "Data.Definition should be already set!");
1698 Data.FirstFriend = ReadDeclID();
1700 if (Data.IsLambda) {
1701 using Capture = LambdaCapture;
1703 auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1704 Lambda.Dependent = Record.readInt();
1705 Lambda.IsGenericLambda = Record.readInt();
1706 Lambda.CaptureDefault = Record.readInt();
1707 Lambda.NumCaptures = Record.readInt();
1708 Lambda.NumExplicitCaptures = Record.readInt();
1709 Lambda.ManglingNumber = Record.readInt();
1710 Lambda.ContextDecl = ReadDeclID();
1711 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1712 sizeof(Capture) * Lambda.NumCaptures);
1713 Capture *ToCapture = Lambda.Captures;
1714 Lambda.MethodTyInfo = GetTypeSourceInfo();
1715 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1716 SourceLocation Loc = ReadSourceLocation();
1717 bool IsImplicit = Record.readInt();
1718 auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1723 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1727 auto *Var = ReadDeclAs<VarDecl>();
1728 SourceLocation EllipsisLoc = ReadSourceLocation();
1729 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1736 void ASTDeclReader::MergeDefinitionData(
1737 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1738 assert(D->DefinitionData &&
1739 "merging class definition into non-definition");
1740 auto &DD = *D->DefinitionData;
1742 if (DD.Definition != MergeDD.Definition) {
1743 // Track that we merged the definitions.
1744 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1746 Reader.PendingDefinitions.erase(MergeDD.Definition);
1747 MergeDD.Definition->IsCompleteDefinition = false;
1748 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1749 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1750 "already loaded pending lookups for merged definition");
1753 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1754 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1755 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1756 // We faked up this definition data because we found a class for which we'd
1757 // not yet loaded the definition. Replace it with the real thing now.
1758 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1759 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1761 // Don't change which declaration is the definition; that is required
1762 // to be invariant once we select it.
1763 auto *Def = DD.Definition;
1764 DD = std::move(MergeDD);
1765 DD.Definition = Def;
1769 // FIXME: Move this out into a .def file?
1770 bool DetectedOdrViolation = false;
1771 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1772 #define MATCH_FIELD(Field) \
1773 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1775 MATCH_FIELD(UserDeclaredConstructor)
1776 MATCH_FIELD(UserDeclaredSpecialMembers)
1777 MATCH_FIELD(Aggregate)
1778 MATCH_FIELD(PlainOldData)
1780 MATCH_FIELD(Polymorphic)
1781 MATCH_FIELD(Abstract)
1782 MATCH_FIELD(IsStandardLayout)
1783 MATCH_FIELD(IsCXX11StandardLayout)
1784 MATCH_FIELD(HasBasesWithFields)
1785 MATCH_FIELD(HasBasesWithNonStaticDataMembers)
1786 MATCH_FIELD(HasPrivateFields)
1787 MATCH_FIELD(HasProtectedFields)
1788 MATCH_FIELD(HasPublicFields)
1789 MATCH_FIELD(HasMutableFields)
1790 MATCH_FIELD(HasVariantMembers)
1791 MATCH_FIELD(HasOnlyCMembers)
1792 MATCH_FIELD(HasInClassInitializer)
1793 MATCH_FIELD(HasUninitializedReferenceMember)
1794 MATCH_FIELD(HasUninitializedFields)
1795 MATCH_FIELD(HasInheritedConstructor)
1796 MATCH_FIELD(HasInheritedAssignment)
1797 MATCH_FIELD(NeedOverloadResolutionForCopyConstructor)
1798 MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1799 MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1800 MATCH_FIELD(NeedOverloadResolutionForDestructor)
1801 MATCH_FIELD(DefaultedCopyConstructorIsDeleted)
1802 MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1803 MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1804 MATCH_FIELD(DefaultedDestructorIsDeleted)
1805 OR_FIELD(HasTrivialSpecialMembers)
1806 OR_FIELD(HasTrivialSpecialMembersForCall)
1807 OR_FIELD(DeclaredNonTrivialSpecialMembers)
1808 OR_FIELD(DeclaredNonTrivialSpecialMembersForCall)
1809 MATCH_FIELD(HasIrrelevantDestructor)
1810 OR_FIELD(HasConstexprNonCopyMoveConstructor)
1811 OR_FIELD(HasDefaultedDefaultConstructor)
1812 MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1813 OR_FIELD(HasConstexprDefaultConstructor)
1814 MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1815 // ComputedVisibleConversions is handled below.
1816 MATCH_FIELD(UserProvidedDefaultConstructor)
1817 OR_FIELD(DeclaredSpecialMembers)
1818 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1819 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1820 MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1821 OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1822 OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1823 MATCH_FIELD(IsLambda)
1827 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1828 DetectedOdrViolation = true;
1829 // FIXME: Issue a diagnostic if the base classes don't match when we come
1830 // to lazily load them.
1832 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1833 // match when we come to lazily load them.
1834 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1835 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1836 DD.ComputedVisibleConversions = true;
1839 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1843 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1844 // when they occur within the body of a function template specialization).
1847 if (D->getODRHash() != MergeDD.ODRHash) {
1848 DetectedOdrViolation = true;
1851 if (DetectedOdrViolation)
1852 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1853 {MergeDD.Definition, &MergeDD});
1856 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1857 struct CXXRecordDecl::DefinitionData *DD;
1858 ASTContext &C = Reader.getContext();
1860 // Determine whether this is a lambda closure type, so that we can
1861 // allocate the appropriate DefinitionData structure.
1862 bool IsLambda = Record.readInt();
1864 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1867 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1869 CXXRecordDecl *Canon = D->getCanonicalDecl();
1870 // Set decl definition data before reading it, so that during deserialization
1871 // when we read CXXRecordDecl, it already has definition data and we don't
1873 if (!Canon->DefinitionData)
1874 Canon->DefinitionData = DD;
1875 D->DefinitionData = Canon->DefinitionData;
1876 ReadCXXDefinitionData(*DD, D);
1878 // We might already have a different definition for this record. This can
1879 // happen either because we're reading an update record, or because we've
1880 // already done some merging. Either way, just merge into it.
1881 if (Canon->DefinitionData != DD) {
1882 MergeDefinitionData(Canon, std::move(*DD));
1886 // Mark this declaration as being a definition.
1887 D->IsCompleteDefinition = true;
1889 // If this is not the first declaration or is an update record, we can have
1890 // other redeclarations already. Make a note that we need to propagate the
1891 // DefinitionData pointer onto them.
1892 if (Update || Canon != D)
1893 Reader.PendingDefinitions.insert(D);
1896 ASTDeclReader::RedeclarableResult
1897 ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1898 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1900 ASTContext &C = Reader.getContext();
1903 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1905 switch ((CXXRecKind)Record.readInt()) {
1906 case CXXRecNotTemplate:
1907 // Merged when we merge the folding set entry in the primary template.
1908 if (!isa<ClassTemplateSpecializationDecl>(D))
1909 mergeRedeclarable(D, Redecl);
1911 case CXXRecTemplate: {
1912 // Merged when we merge the template.
1913 auto *Template = ReadDeclAs<ClassTemplateDecl>();
1914 D->TemplateOrInstantiation = Template;
1915 if (!Template->getTemplatedDecl()) {
1916 // We've not actually loaded the ClassTemplateDecl yet, because we're
1917 // currently being loaded as its pattern. Rely on it to set up our
1918 // TypeForDecl (see VisitClassTemplateDecl).
1920 // Beware: we do not yet know our canonical declaration, and may still
1921 // get merged once the surrounding class template has got off the ground.
1926 case CXXRecMemberSpecialization: {
1927 auto *RD = ReadDeclAs<CXXRecordDecl>();
1928 auto TSK = (TemplateSpecializationKind)Record.readInt();
1929 SourceLocation POI = ReadSourceLocation();
1930 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1931 MSI->setPointOfInstantiation(POI);
1932 D->TemplateOrInstantiation = MSI;
1933 mergeRedeclarable(D, Redecl);
1938 bool WasDefinition = Record.readInt();
1940 ReadCXXRecordDefinition(D, /*Update*/false);
1942 // Propagate DefinitionData pointer from the canonical declaration.
1943 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1945 // Lazily load the key function to avoid deserializing every method so we can
1947 if (WasDefinition) {
1948 DeclID KeyFn = ReadDeclID();
1949 if (KeyFn && D->IsCompleteDefinition)
1950 // FIXME: This is wrong for the ARM ABI, where some other module may have
1951 // made this function no longer be a key function. We need an update
1952 // record or similar for that case.
1953 C.KeyFunctions[D] = KeyFn;
1959 void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1960 VisitFunctionDecl(D);
1961 D->IsCopyDeductionCandidate = Record.readInt();
1964 void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1965 VisitFunctionDecl(D);
1967 unsigned NumOverridenMethods = Record.readInt();
1968 if (D->isCanonicalDecl()) {
1969 while (NumOverridenMethods--) {
1970 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1971 // MD may be initializing.
1972 if (auto *MD = ReadDeclAs<CXXMethodDecl>())
1973 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1976 // We don't care about which declarations this used to override; we get
1977 // the relevant information from the canonical declaration.
1978 Record.skipInts(NumOverridenMethods);
1982 void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1983 // We need the inherited constructor information to merge the declaration,
1984 // so we have to read it before we call VisitCXXMethodDecl.
1985 if (D->isInheritingConstructor()) {
1986 auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1987 auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1988 *D->getTrailingObjects<InheritedConstructor>() =
1989 InheritedConstructor(Shadow, Ctor);
1992 VisitCXXMethodDecl(D);
1995 void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1996 VisitCXXMethodDecl(D);
1998 if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
1999 CXXDestructorDecl *Canon = D->getCanonicalDecl();
2000 auto *ThisArg = Record.readExpr();
2001 // FIXME: Check consistency if we have an old and new operator delete.
2002 if (!Canon->OperatorDelete) {
2003 Canon->OperatorDelete = OperatorDelete;
2004 Canon->OperatorDeleteThisArg = ThisArg;
2009 void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
2010 VisitCXXMethodDecl(D);
2013 void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
2015 D->ImportedAndComplete.setPointer(readModule());
2016 D->ImportedAndComplete.setInt(Record.readInt());
2017 auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
2018 for (unsigned I = 0, N = Record.back(); I != N; ++I)
2019 StoredLocs[I] = ReadSourceLocation();
2020 Record.skipInts(1); // The number of stored source locations.
2023 void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
2025 D->setColonLoc(ReadSourceLocation());
2028 void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
2030 if (Record.readInt()) // hasFriendDecl
2031 D->Friend = ReadDeclAs<NamedDecl>();
2033 D->Friend = GetTypeSourceInfo();
2034 for (unsigned i = 0; i != D->NumTPLists; ++i)
2035 D->getTrailingObjects<TemplateParameterList *>()[i] =
2036 Record.readTemplateParameterList();
2037 D->NextFriend = ReadDeclID();
2038 D->UnsupportedFriend = (Record.readInt() != 0);
2039 D->FriendLoc = ReadSourceLocation();
2042 void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
2044 unsigned NumParams = Record.readInt();
2045 D->NumParams = NumParams;
2046 D->Params = new TemplateParameterList*[NumParams];
2047 for (unsigned i = 0; i != NumParams; ++i)
2048 D->Params[i] = Record.readTemplateParameterList();
2049 if (Record.readInt()) // HasFriendDecl
2050 D->Friend = ReadDeclAs<NamedDecl>();
2052 D->Friend = GetTypeSourceInfo();
2053 D->FriendLoc = ReadSourceLocation();
2056 DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
2059 DeclID PatternID = ReadDeclID();
2060 auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2061 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2062 // FIXME handle associated constraints
2063 D->init(TemplatedDecl, TemplateParams);
2068 ASTDeclReader::RedeclarableResult
2069 ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
2070 RedeclarableResult Redecl = VisitRedeclarable(D);
2072 // Make sure we've allocated the Common pointer first. We do this before
2073 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2074 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
2075 if (!CanonD->Common) {
2076 CanonD->Common = CanonD->newCommon(Reader.getContext());
2077 Reader.PendingDefinitions.insert(CanonD);
2079 D->Common = CanonD->Common;
2081 // If this is the first declaration of the template, fill in the information
2082 // for the 'common' pointer.
2083 if (ThisDeclID == Redecl.getFirstID()) {
2084 if (auto *RTD = ReadDeclAs<RedeclarableTemplateDecl>()) {
2085 assert(RTD->getKind() == D->getKind() &&
2086 "InstantiatedFromMemberTemplate kind mismatch");
2087 D->setInstantiatedFromMemberTemplate(RTD);
2088 if (Record.readInt())
2089 D->setMemberSpecialization();
2093 DeclID PatternID = VisitTemplateDecl(D);
2094 D->IdentifierNamespace = Record.readInt();
2096 mergeRedeclarable(D, Redecl, PatternID);
2098 // If we merged the template with a prior declaration chain, merge the common
2100 // FIXME: Actually merge here, don't just overwrite.
2101 D->Common = D->getCanonicalDecl()->Common;
2106 void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2107 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2109 if (ThisDeclID == Redecl.getFirstID()) {
2110 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2111 // the specializations.
2112 SmallVector<serialization::DeclID, 32> SpecIDs;
2113 ReadDeclIDList(SpecIDs);
2114 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2117 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2118 // We were loaded before our templated declaration was. We've not set up
2119 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2121 Reader.getContext().getInjectedClassNameType(
2122 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2126 void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2127 llvm_unreachable("BuiltinTemplates are not serialized");
2130 /// TODO: Unify with ClassTemplateDecl version?
2131 /// May require unifying ClassTemplateDecl and
2132 /// VarTemplateDecl beyond TemplateDecl...
2133 void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2134 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2136 if (ThisDeclID == Redecl.getFirstID()) {
2137 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2138 // the specializations.
2139 SmallVector<serialization::DeclID, 32> SpecIDs;
2140 ReadDeclIDList(SpecIDs);
2141 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2145 ASTDeclReader::RedeclarableResult
2146 ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2147 ClassTemplateSpecializationDecl *D) {
2148 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2150 ASTContext &C = Reader.getContext();
2151 if (Decl *InstD = ReadDecl()) {
2152 if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2153 D->SpecializedTemplate = CTD;
2155 SmallVector<TemplateArgument, 8> TemplArgs;
2156 Record.readTemplateArgumentList(TemplArgs);
2157 TemplateArgumentList *ArgList
2158 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2160 new (C) ClassTemplateSpecializationDecl::
2161 SpecializedPartialSpecialization();
2162 PS->PartialSpecialization
2163 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2164 PS->TemplateArgs = ArgList;
2165 D->SpecializedTemplate = PS;
2169 SmallVector<TemplateArgument, 8> TemplArgs;
2170 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2171 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2172 D->PointOfInstantiation = ReadSourceLocation();
2173 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2175 bool writtenAsCanonicalDecl = Record.readInt();
2176 if (writtenAsCanonicalDecl) {
2177 auto *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2178 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2179 // Set this as, or find, the canonical declaration for this specialization
2180 ClassTemplateSpecializationDecl *CanonSpec;
2181 if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2182 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2183 .GetOrInsertNode(Partial);
2186 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2188 // If there was already a canonical specialization, merge into it.
2189 if (CanonSpec != D) {
2190 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2192 // This declaration might be a definition. Merge with any existing
2194 if (auto *DDD = D->DefinitionData) {
2195 if (CanonSpec->DefinitionData)
2196 MergeDefinitionData(CanonSpec, std::move(*DDD));
2198 CanonSpec->DefinitionData = D->DefinitionData;
2200 D->DefinitionData = CanonSpec->DefinitionData;
2206 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2207 auto *ExplicitInfo =
2208 new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2209 ExplicitInfo->TypeAsWritten = TyInfo;
2210 ExplicitInfo->ExternLoc = ReadSourceLocation();
2211 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2212 D->ExplicitInfo = ExplicitInfo;
2218 void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2219 ClassTemplatePartialSpecializationDecl *D) {
2220 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2222 D->TemplateParams = Record.readTemplateParameterList();
2223 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2225 // These are read/set from/to the first declaration.
2226 if (ThisDeclID == Redecl.getFirstID()) {
2227 D->InstantiatedFromMember.setPointer(
2228 ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2229 D->InstantiatedFromMember.setInt(Record.readInt());
2233 void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2234 ClassScopeFunctionSpecializationDecl *D) {
2236 D->Specialization = ReadDeclAs<CXXMethodDecl>();
2239 void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2240 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2242 if (ThisDeclID == Redecl.getFirstID()) {
2243 // This FunctionTemplateDecl owns a CommonPtr; read it.
2244 SmallVector<serialization::DeclID, 32> SpecIDs;
2245 ReadDeclIDList(SpecIDs);
2246 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2250 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2251 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2252 /// VarTemplate(Partial)SpecializationDecl with a new data
2253 /// structure Template(Partial)SpecializationDecl, and
2254 /// using Template(Partial)SpecializationDecl as input type.
2255 ASTDeclReader::RedeclarableResult
2256 ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2257 VarTemplateSpecializationDecl *D) {
2258 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2260 ASTContext &C = Reader.getContext();
2261 if (Decl *InstD = ReadDecl()) {
2262 if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2263 D->SpecializedTemplate = VTD;
2265 SmallVector<TemplateArgument, 8> TemplArgs;
2266 Record.readTemplateArgumentList(TemplArgs);
2267 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2271 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2272 PS->PartialSpecialization =
2273 cast<VarTemplatePartialSpecializationDecl>(InstD);
2274 PS->TemplateArgs = ArgList;
2275 D->SpecializedTemplate = PS;
2280 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2281 auto *ExplicitInfo =
2282 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2283 ExplicitInfo->TypeAsWritten = TyInfo;
2284 ExplicitInfo->ExternLoc = ReadSourceLocation();
2285 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2286 D->ExplicitInfo = ExplicitInfo;
2289 SmallVector<TemplateArgument, 8> TemplArgs;
2290 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2291 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2292 D->PointOfInstantiation = ReadSourceLocation();
2293 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2294 D->IsCompleteDefinition = Record.readInt();
2296 bool writtenAsCanonicalDecl = Record.readInt();
2297 if (writtenAsCanonicalDecl) {
2298 auto *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2299 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2300 // FIXME: If it's already present, merge it.
2301 if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2302 CanonPattern->getCommonPtr()->PartialSpecializations
2303 .GetOrInsertNode(Partial);
2305 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2313 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2314 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2315 /// VarTemplate(Partial)SpecializationDecl with a new data
2316 /// structure Template(Partial)SpecializationDecl, and
2317 /// using Template(Partial)SpecializationDecl as input type.
2318 void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2319 VarTemplatePartialSpecializationDecl *D) {
2320 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2322 D->TemplateParams = Record.readTemplateParameterList();
2323 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2325 // These are read/set from/to the first declaration.
2326 if (ThisDeclID == Redecl.getFirstID()) {
2327 D->InstantiatedFromMember.setPointer(
2328 ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2329 D->InstantiatedFromMember.setInt(Record.readInt());
2333 void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2336 D->setDeclaredWithTypename(Record.readInt());
2338 if (Record.readInt())
2339 D->setDefaultArgument(GetTypeSourceInfo());
2342 void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2343 VisitDeclaratorDecl(D);
2344 // TemplateParmPosition.
2345 D->setDepth(Record.readInt());
2346 D->setPosition(Record.readInt());
2347 if (D->isExpandedParameterPack()) {
2348 auto TypesAndInfos =
2349 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2350 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2351 new (&TypesAndInfos[I].first) QualType(Record.readType());
2352 TypesAndInfos[I].second = GetTypeSourceInfo();
2355 // Rest of NonTypeTemplateParmDecl.
2356 D->ParameterPack = Record.readInt();
2357 if (Record.readInt())
2358 D->setDefaultArgument(Record.readExpr());
2362 void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2363 VisitTemplateDecl(D);
2364 // TemplateParmPosition.
2365 D->setDepth(Record.readInt());
2366 D->setPosition(Record.readInt());
2367 if (D->isExpandedParameterPack()) {
2368 auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2369 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2371 Data[I] = Record.readTemplateParameterList();
2373 // Rest of TemplateTemplateParmDecl.
2374 D->ParameterPack = Record.readInt();
2375 if (Record.readInt())
2376 D->setDefaultArgument(Reader.getContext(),
2377 Record.readTemplateArgumentLoc());
2381 void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2382 VisitRedeclarableTemplateDecl(D);
2385 void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2387 D->AssertExprAndFailed.setPointer(Record.readExpr());
2388 D->AssertExprAndFailed.setInt(Record.readInt());
2389 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2390 D->RParenLoc = ReadSourceLocation();
2393 void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2397 std::pair<uint64_t, uint64_t>
2398 ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2399 uint64_t LexicalOffset = ReadLocalOffset();
2400 uint64_t VisibleOffset = ReadLocalOffset();
2401 return std::make_pair(LexicalOffset, VisibleOffset);
2404 template <typename T>
2405 ASTDeclReader::RedeclarableResult
2406 ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2407 DeclID FirstDeclID = ReadDeclID();
2408 Decl *MergeWith = nullptr;
2410 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2411 bool IsFirstLocalDecl = false;
2413 uint64_t RedeclOffset = 0;
2415 // 0 indicates that this declaration was the only declaration of its entity,
2416 // and is used for space optimization.
2417 if (FirstDeclID == 0) {
2418 FirstDeclID = ThisDeclID;
2420 IsFirstLocalDecl = true;
2421 } else if (unsigned N = Record.readInt()) {
2422 // This declaration was the first local declaration, but may have imported
2423 // other declarations.
2425 IsFirstLocalDecl = true;
2427 // We have some declarations that must be before us in our redeclaration
2428 // chain. Read them now, and remember that we ought to merge with one of
2430 // FIXME: Provide a known merge target to the second and subsequent such
2432 for (unsigned I = 0; I != N - 1; ++I)
2433 MergeWith = ReadDecl();
2435 RedeclOffset = ReadLocalOffset();
2437 // This declaration was not the first local declaration. Read the first
2438 // local declaration now, to trigger the import of other redeclarations.
2442 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2443 if (FirstDecl != D) {
2444 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2445 // We temporarily set the first (canonical) declaration as the previous one
2446 // which is the one that matters and mark the real previous DeclID to be
2447 // loaded & attached later on.
2448 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2449 D->First = FirstDecl->getCanonicalDecl();
2452 auto *DAsT = static_cast<T *>(D);
2454 // Note that we need to load local redeclarations of this decl and build a
2455 // decl chain for them. This must happen *after* we perform the preloading
2456 // above; this ensures that the redeclaration chain is built in the correct
2458 if (IsFirstLocalDecl)
2459 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2461 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2464 /// Attempts to merge the given declaration (D) with another declaration
2465 /// of the same entity.
2466 template<typename T>
2467 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2468 RedeclarableResult &Redecl,
2469 DeclID TemplatePatternID) {
2470 // If modules are not available, there is no reason to perform this merge.
2471 if (!Reader.getContext().getLangOpts().Modules)
2474 // If we're not the canonical declaration, we don't need to merge.
2475 if (!DBase->isFirstDecl())
2478 auto *D = static_cast<T *>(DBase);
2480 if (auto *Existing = Redecl.getKnownMergeTarget())
2481 // We already know of an existing declaration we should merge with.
2482 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2483 else if (FindExistingResult ExistingRes = findExisting(D))
2484 if (T *Existing = ExistingRes)
2485 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2488 /// "Cast" to type T, asserting if we don't have an implicit conversion.
2489 /// We use this to put code in a template that will only be valid for certain
2491 template<typename T> static T assert_cast(T t) { return t; }
2492 template<typename T> static T assert_cast(...) {
2493 llvm_unreachable("bad assert_cast");
2496 /// Merge together the pattern declarations from two template
2498 void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2499 RedeclarableTemplateDecl *Existing,
2500 DeclID DsID, bool IsKeyDecl) {
2501 auto *DPattern = D->getTemplatedDecl();
2502 auto *ExistingPattern = Existing->getTemplatedDecl();
2503 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2504 DPattern->getCanonicalDecl()->getGlobalID(),
2507 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2508 // Merge with any existing definition.
2509 // FIXME: This is duplicated in several places. Refactor.
2510 auto *ExistingClass =
2511 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2512 if (auto *DDD = DClass->DefinitionData) {
2513 if (ExistingClass->DefinitionData) {
2514 MergeDefinitionData(ExistingClass, std::move(*DDD));
2516 ExistingClass->DefinitionData = DClass->DefinitionData;
2517 // We may have skipped this before because we thought that DClass
2518 // was the canonical declaration.
2519 Reader.PendingDefinitions.insert(DClass);
2522 DClass->DefinitionData = ExistingClass->DefinitionData;
2524 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2527 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2528 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2530 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2531 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2532 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2533 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2535 llvm_unreachable("merged an unknown kind of redeclarable template");
2538 /// Attempts to merge the given declaration (D) with another declaration
2539 /// of the same entity.
2540 template<typename T>
2541 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2542 RedeclarableResult &Redecl,
2543 DeclID TemplatePatternID) {
2544 auto *D = static_cast<T *>(DBase);
2545 T *ExistingCanon = Existing->getCanonicalDecl();
2546 T *DCanon = D->getCanonicalDecl();
2547 if (ExistingCanon != DCanon) {
2548 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2549 "already merged this declaration");
2551 // Have our redeclaration link point back at the canonical declaration
2552 // of the existing declaration, so that this declaration has the
2553 // appropriate canonical declaration.
2554 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2555 D->First = ExistingCanon;
2556 ExistingCanon->Used |= D->Used;
2559 // When we merge a namespace, update its pointer to the first namespace.
2560 // We cannot have loaded any redeclarations of this declaration yet, so
2561 // there's nothing else that needs to be updated.
2562 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2563 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2564 assert_cast<NamespaceDecl*>(ExistingCanon));
2566 // When we merge a template, merge its pattern.
2567 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2568 mergeTemplatePattern(
2569 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2570 TemplatePatternID, Redecl.isKeyDecl());
2572 // If this declaration is a key declaration, make a note of that.
2573 if (Redecl.isKeyDecl())
2574 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2578 /// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2579 /// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2580 /// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2581 /// that some types are mergeable during deserialization, otherwise name
2582 /// lookup fails. This is the case for EnumConstantDecl.
2583 static bool allowODRLikeMergeInC(NamedDecl *ND) {
2586 // TODO: implement merge for other necessary decls.
2587 if (isa<EnumConstantDecl>(ND))
2592 /// Attempts to merge the given declaration (D) with another declaration
2593 /// of the same entity, for the case where the entity is not actually
2594 /// redeclarable. This happens, for instance, when merging the fields of
2595 /// identical class definitions from two different modules.
2596 template<typename T>
2597 void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2598 // If modules are not available, there is no reason to perform this merge.
2599 if (!Reader.getContext().getLangOpts().Modules)
2602 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2603 // Note that C identically-named things in different translation units are
2604 // not redeclarations, but may still have compatible types, where ODR-like
2605 // semantics may apply.
2606 if (!Reader.getContext().getLangOpts().CPlusPlus &&
2607 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2610 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2611 if (T *Existing = ExistingRes)
2612 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2613 Existing->getCanonicalDecl());
2616 void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2618 unsigned NumVars = D->varlist_size();
2619 SmallVector<Expr *, 16> Vars;
2620 Vars.reserve(NumVars);
2621 for (unsigned i = 0; i != NumVars; ++i) {
2622 Vars.push_back(Record.readExpr());
2627 void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2629 D->setLocation(ReadSourceLocation());
2630 D->setCombiner(Record.readExpr());
2633 static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt()));
2634 D->PrevDeclInScope = ReadDeclID();
2637 void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2641 //===----------------------------------------------------------------------===//
2642 // Attribute Reading
2643 //===----------------------------------------------------------------------===//
2645 /// Reads attributes from the current stream position.
2646 void ASTReader::ReadAttributes(ASTRecordReader &Record, AttrVec &Attrs) {
2647 for (unsigned i = 0, e = Record.readInt(); i != e; ++i) {
2648 Attr *New = nullptr;
2649 auto Kind = (attr::Kind)Record.readInt();
2650 SourceRange Range = Record.readSourceRange();
2651 ASTContext &Context = getContext();
2653 #include "clang/Serialization/AttrPCHRead.inc"
2655 assert(New && "Unable to decode attribute?");
2656 Attrs.push_back(New);
2660 //===----------------------------------------------------------------------===//
2661 // ASTReader Implementation
2662 //===----------------------------------------------------------------------===//
2664 /// Note that we have loaded the declaration with the given
2667 /// This routine notes that this declaration has already been loaded,
2668 /// so that future GetDecl calls will return this declaration rather
2669 /// than trying to load a new declaration.
2670 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2671 assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2672 DeclsLoaded[Index] = D;
2675 /// Determine whether the consumer will be interested in seeing
2676 /// this declaration (via HandleTopLevelDecl).
2678 /// This routine should return true for anything that might affect
2679 /// code generation, e.g., inline function definitions, Objective-C
2680 /// declarations with metadata, etc.
2681 static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2682 // An ObjCMethodDecl is never considered as "interesting" because its
2683 // implementation container always is.
2685 // An ImportDecl or VarDecl imported from a module map module will get
2686 // emitted when we import the relevant module.
2687 if (isa<ImportDecl>(D) || isa<VarDecl>(D)) {
2688 auto *M = D->getImportedOwningModule();
2689 if (M && M->Kind == Module::ModuleMapModule &&
2690 Ctx.DeclMustBeEmitted(D))
2694 if (isa<FileScopeAsmDecl>(D) ||
2695 isa<ObjCProtocolDecl>(D) ||
2696 isa<ObjCImplDecl>(D) ||
2697 isa<ImportDecl>(D) ||
2698 isa<PragmaCommentDecl>(D) ||
2699 isa<PragmaDetectMismatchDecl>(D))
2701 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D))
2702 return !D->getDeclContext()->isFunctionOrMethod();
2703 if (const auto *Var = dyn_cast<VarDecl>(D))
2704 return Var->isFileVarDecl() &&
2705 Var->isThisDeclarationADefinition() == VarDecl::Definition;
2706 if (const auto *Func = dyn_cast<FunctionDecl>(D))
2707 return Func->doesThisDeclarationHaveABody() || HasBody;
2709 if (auto *ES = D->getASTContext().getExternalSource())
2710 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2716 /// Get the correct cursor and offset for loading a declaration.
2717 ASTReader::RecordLocation
2718 ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2719 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2720 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2721 ModuleFile *M = I->second;
2722 const DeclOffset &DOffs =
2723 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2724 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2725 return RecordLocation(M, DOffs.BitOffset);
2728 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2729 auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2731 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2732 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2735 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2736 return LocalOffset + M.GlobalBitOffset;
2739 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2740 const TemplateParameterList *Y);
2742 /// Determine whether two template parameters are similar enough
2743 /// that they may be used in declarations of the same template.
2744 static bool isSameTemplateParameter(const NamedDecl *X,
2745 const NamedDecl *Y) {
2746 if (X->getKind() != Y->getKind())
2749 if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2750 const auto *TY = cast<TemplateTypeParmDecl>(Y);
2751 return TX->isParameterPack() == TY->isParameterPack();
2754 if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2755 const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2756 return TX->isParameterPack() == TY->isParameterPack() &&
2757 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2760 const auto *TX = cast<TemplateTemplateParmDecl>(X);
2761 const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2762 return TX->isParameterPack() == TY->isParameterPack() &&
2763 isSameTemplateParameterList(TX->getTemplateParameters(),
2764 TY->getTemplateParameters());
2767 static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2768 if (auto *NS = X->getAsNamespace())
2770 if (auto *NAS = X->getAsNamespaceAlias())
2771 return NAS->getNamespace();
2775 static bool isSameQualifier(const NestedNameSpecifier *X,
2776 const NestedNameSpecifier *Y) {
2777 if (auto *NSX = getNamespace(X)) {
2778 auto *NSY = getNamespace(Y);
2779 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2781 } else if (X->getKind() != Y->getKind())
2784 // FIXME: For namespaces and types, we're permitted to check that the entity
2785 // is named via the same tokens. We should probably do so.
2786 switch (X->getKind()) {
2787 case NestedNameSpecifier::Identifier:
2788 if (X->getAsIdentifier() != Y->getAsIdentifier())
2791 case NestedNameSpecifier::Namespace:
2792 case NestedNameSpecifier::NamespaceAlias:
2793 // We've already checked that we named the same namespace.
2795 case NestedNameSpecifier::TypeSpec:
2796 case NestedNameSpecifier::TypeSpecWithTemplate:
2797 if (X->getAsType()->getCanonicalTypeInternal() !=
2798 Y->getAsType()->getCanonicalTypeInternal())
2801 case NestedNameSpecifier::Global:
2802 case NestedNameSpecifier::Super:
2806 // Recurse into earlier portion of NNS, if any.
2807 auto *PX = X->getPrefix();
2808 auto *PY = Y->getPrefix();
2810 return isSameQualifier(PX, PY);
2814 /// Determine whether two template parameter lists are similar enough
2815 /// that they may be used in declarations of the same template.
2816 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2817 const TemplateParameterList *Y) {
2818 if (X->size() != Y->size())
2821 for (unsigned I = 0, N = X->size(); I != N; ++I)
2822 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2828 /// Determine whether the attributes we can overload on are identical for A and
2829 /// B. Will ignore any overloadable attrs represented in the type of A and B.
2830 static bool hasSameOverloadableAttrs(const FunctionDecl *A,
2831 const FunctionDecl *B) {
2832 // Note that pass_object_size attributes are represented in the function's
2833 // ExtParameterInfo, so we don't need to check them here.
2835 SmallVector<const EnableIfAttr *, 4> AEnableIfs;
2836 // Since this is an equality check, we can ignore that enable_if attrs show up
2837 // in reverse order.
2838 for (const auto *EIA : A->specific_attrs<EnableIfAttr>())
2839 AEnableIfs.push_back(EIA);
2841 SmallVector<const EnableIfAttr *, 4> BEnableIfs;
2842 for (const auto *EIA : B->specific_attrs<EnableIfAttr>())
2843 BEnableIfs.push_back(EIA);
2845 // Two very common cases: either we have 0 enable_if attrs, or we have an
2846 // unequal number of enable_if attrs.
2847 if (AEnableIfs.empty() && BEnableIfs.empty())
2850 if (AEnableIfs.size() != BEnableIfs.size())
2853 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2854 for (unsigned I = 0, E = AEnableIfs.size(); I != E; ++I) {
2858 AEnableIfs[I]->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2859 BEnableIfs[I]->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2860 if (Cand1ID != Cand2ID)
2867 /// Determine whether the two declarations refer to the same entity.
2868 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2869 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2874 // Must be in the same context.
2876 // Note that we can't use DeclContext::Equals here, because the DeclContexts
2877 // could be two different declarations of the same function. (We will fix the
2878 // semantic DC to refer to the primary definition after merging.)
2879 if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
2880 cast<Decl>(Y->getDeclContext()->getRedeclContext())))
2883 // Two typedefs refer to the same entity if they have the same underlying
2885 if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
2886 if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2887 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2888 TypedefY->getUnderlyingType());
2890 // Must have the same kind.
2891 if (X->getKind() != Y->getKind())
2894 // Objective-C classes and protocols with the same name always match.
2895 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2898 if (isa<ClassTemplateSpecializationDecl>(X)) {
2899 // No need to handle these here: we merge them when adding them to the
2904 // Compatible tags match.
2905 if (const auto *TagX = dyn_cast<TagDecl>(X)) {
2906 const auto *TagY = cast<TagDecl>(Y);
2907 return (TagX->getTagKind() == TagY->getTagKind()) ||
2908 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2909 TagX->getTagKind() == TTK_Interface) &&
2910 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2911 TagY->getTagKind() == TTK_Interface));
2914 // Functions with the same type and linkage match.
2915 // FIXME: This needs to cope with merging of prototyped/non-prototyped
2917 if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
2918 const auto *FuncY = cast<FunctionDecl>(Y);
2919 if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
2920 const auto *CtorY = cast<CXXConstructorDecl>(Y);
2921 if (CtorX->getInheritedConstructor() &&
2922 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
2923 CtorY->getInheritedConstructor().getConstructor()))
2927 if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
2930 // Multiversioned functions with different feature strings are represented
2931 // as separate declarations.
2932 if (FuncX->isMultiVersion()) {
2933 const auto *TAX = FuncX->getAttr<TargetAttr>();
2934 const auto *TAY = FuncY->getAttr<TargetAttr>();
2935 assert(TAX && TAY && "Multiversion Function without target attribute");
2937 if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
2941 ASTContext &C = FuncX->getASTContext();
2942 auto GetTypeAsWritten = [](const FunctionDecl *FD) {
2943 // Map to the first declaration that we've already merged into this one.
2944 // The TSI of redeclarations might not match (due to calling conventions
2945 // being inherited onto the type but not the TSI), but the TSI type of
2946 // the first declaration of the function should match across modules.
2947 FD = FD->getCanonicalDecl();
2948 return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
2951 QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
2952 if (!C.hasSameType(XT, YT)) {
2953 // We can get functions with different types on the redecl chain in C++17
2954 // if they have differing exception specifications and at least one of
2955 // the excpetion specs is unresolved.
2956 auto *XFPT = XT->getAs<FunctionProtoType>();
2957 auto *YFPT = YT->getAs<FunctionProtoType>();
2958 if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
2959 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
2960 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
2961 C.hasSameFunctionTypeIgnoringExceptionSpec(XT, YT))
2965 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
2966 hasSameOverloadableAttrs(FuncX, FuncY);
2969 // Variables with the same type and linkage match.
2970 if (const auto *VarX = dyn_cast<VarDecl>(X)) {
2971 const auto *VarY = cast<VarDecl>(Y);
2972 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
2973 ASTContext &C = VarX->getASTContext();
2974 if (C.hasSameType(VarX->getType(), VarY->getType()))
2977 // We can get decls with different types on the redecl chain. Eg.
2978 // template <typename T> struct S { static T Var[]; }; // #1
2979 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
2980 // Only? happens when completing an incomplete array type. In this case
2981 // when comparing #1 and #2 we should go through their element type.
2982 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
2983 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
2984 if (!VarXTy || !VarYTy)
2986 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
2987 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
2992 // Namespaces with the same name and inlinedness match.
2993 if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
2994 const auto *NamespaceY = cast<NamespaceDecl>(Y);
2995 return NamespaceX->isInline() == NamespaceY->isInline();
2998 // Identical template names and kinds match if their template parameter lists
2999 // and patterns match.
3000 if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3001 const auto *TemplateY = cast<TemplateDecl>(Y);
3002 return isSameEntity(TemplateX->getTemplatedDecl(),
3003 TemplateY->getTemplatedDecl()) &&
3004 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
3005 TemplateY->getTemplateParameters());
3008 // Fields with the same name and the same type match.
3009 if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3010 const auto *FDY = cast<FieldDecl>(Y);
3011 // FIXME: Also check the bitwidth is odr-equivalent, if any.
3012 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3015 // Indirect fields with the same target field match.
3016 if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3017 const auto *IFDY = cast<IndirectFieldDecl>(Y);
3018 return IFDX->getAnonField()->getCanonicalDecl() ==
3019 IFDY->getAnonField()->getCanonicalDecl();
3022 // Enumerators with the same name match.
3023 if (isa<EnumConstantDecl>(X))
3024 // FIXME: Also check the value is odr-equivalent.
3027 // Using shadow declarations with the same target match.
3028 if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3029 const auto *USY = cast<UsingShadowDecl>(Y);
3030 return USX->getTargetDecl() == USY->getTargetDecl();
3033 // Using declarations with the same qualifier match. (We already know that
3034 // the name matches.)
3035 if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3036 const auto *UY = cast<UsingDecl>(Y);
3037 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3038 UX->hasTypename() == UY->hasTypename() &&
3039 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3041 if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3042 const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3043 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3044 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3046 if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3047 return isSameQualifier(
3049 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3051 // Namespace alias definitions with the same target match.
3052 if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3053 const auto *NAY = cast<NamespaceAliasDecl>(Y);
3054 return NAX->getNamespace()->Equals(NAY->getNamespace());
3060 /// Find the context in which we should search for previous declarations when
3061 /// looking for declarations to merge.
3062 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3064 if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3065 return ND->getOriginalNamespace();
3067 if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3068 // Try to dig out the definition.
3069 auto *DD = RD->DefinitionData;
3071 DD = RD->getCanonicalDecl()->DefinitionData;
3073 // If there's no definition yet, then DC's definition is added by an update
3074 // record, but we've not yet loaded that update record. In this case, we
3075 // commit to DC being the canonical definition now, and will fix this when
3076 // we load the update record.
3078 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3079 RD->IsCompleteDefinition = true;
3080 RD->DefinitionData = DD;
3081 RD->getCanonicalDecl()->DefinitionData = DD;
3083 // Track that we did this horrible thing so that we can fix it later.
3084 Reader.PendingFakeDefinitionData.insert(
3085 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3088 return DD->Definition;
3091 if (auto *ED = dyn_cast<EnumDecl>(DC))
3092 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3095 // We can see the TU here only if we have no Sema object. In that case,
3096 // there's no TU scope to look in, so using the DC alone is sufficient.
3097 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3103 ASTDeclReader::FindExistingResult::~FindExistingResult() {
3104 // Record that we had a typedef name for linkage whether or not we merge
3105 // with that declaration.
3106 if (TypedefNameForLinkage) {
3107 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3108 Reader.ImportedTypedefNamesForLinkage.insert(
3109 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3113 if (!AddResult || Existing)
3116 DeclarationName Name = New->getDeclName();
3117 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3118 if (needsAnonymousDeclarationNumber(New)) {
3119 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3120 AnonymousDeclNumber, New);
3121 } else if (DC->isTranslationUnit() &&
3122 !Reader.getContext().getLangOpts().CPlusPlus) {
3123 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3124 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3126 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3127 // Add the declaration to its redeclaration context so later merging
3128 // lookups will find it.
3129 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3133 /// Find the declaration that should be merged into, given the declaration found
3134 /// by name lookup. If we're merging an anonymous declaration within a typedef,
3135 /// we need a matching typedef, and we merge with the type inside it.
3136 static NamedDecl *getDeclForMerging(NamedDecl *Found,
3137 bool IsTypedefNameForLinkage) {
3138 if (!IsTypedefNameForLinkage)
3141 // If we found a typedef declaration that gives a name to some other
3142 // declaration, then we want that inner declaration. Declarations from
3143 // AST files are handled via ImportedTypedefNamesForLinkage.
3144 if (Found->isFromASTFile())
3147 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3148 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3153 /// Find the declaration to use to populate the anonymous declaration table
3154 /// for the given lexical DeclContext. We only care about finding local
3155 /// definitions of the context; we'll merge imported ones as we go.
3157 ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3158 // For classes, we track the definition as we merge.
3159 if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3160 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3161 return DD ? DD->Definition : nullptr;
3164 // For anything else, walk its merged redeclarations looking for a definition.
3165 // Note that we can't just call getDefinition here because the redeclaration
3166 // chain isn't wired up.
3167 for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3168 if (auto *FD = dyn_cast<FunctionDecl>(D))
3169 if (FD->isThisDeclarationADefinition())
3171 if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3172 if (MD->isThisDeclarationADefinition())
3176 // No merged definition yet.
3180 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3183 // If the lexical context has been merged, look into the now-canonical
3185 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3187 // If we've seen this before, return the canonical declaration.
3188 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3189 if (Index < Previous.size() && Previous[Index])
3190 return Previous[Index];
3192 // If this is the first time, but we have parsed a declaration of the context,
3193 // build the anonymous declaration list from the parsed declaration.
3194 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3195 if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3196 numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3197 if (Previous.size() == Number)
3198 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3200 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3204 return Index < Previous.size() ? Previous[Index] : nullptr;
3207 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3208 DeclContext *DC, unsigned Index,
3210 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3212 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3213 if (Index >= Previous.size())
3214 Previous.resize(Index + 1);
3215 if (!Previous[Index])
3216 Previous[Index] = D;
3219 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3220 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3223 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3224 // Don't bother trying to find unnamed declarations that are in
3225 // unmergeable contexts.
3226 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3227 AnonymousDeclNumber, TypedefNameForLinkage);
3232 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3233 if (TypedefNameForLinkage) {
3234 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3235 std::make_pair(DC, TypedefNameForLinkage));
3236 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3237 if (isSameEntity(It->second, D))
3238 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3239 TypedefNameForLinkage);
3240 // Go on to check in other places in case an existing typedef name
3241 // was not imported.
3244 if (needsAnonymousDeclarationNumber(D)) {
3245 // This is an anonymous declaration that we may need to merge. Look it up
3246 // in its context by number.
3247 if (auto *Existing = getAnonymousDeclForMerging(
3248 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3249 if (isSameEntity(Existing, D))
3250 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3251 TypedefNameForLinkage);
3252 } else if (DC->isTranslationUnit() &&
3253 !Reader.getContext().getLangOpts().CPlusPlus) {
3254 IdentifierResolver &IdResolver = Reader.getIdResolver();
3256 // Temporarily consider the identifier to be up-to-date. We don't want to
3257 // cause additional lookups here.
3258 class UpToDateIdentifierRAII {
3260 bool WasOutToDate = false;
3263 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3265 WasOutToDate = II->isOutOfDate();
3267 II->setOutOfDate(false);
3271 ~UpToDateIdentifierRAII() {
3273 II->setOutOfDate(true);
3275 } UpToDate(Name.getAsIdentifierInfo());
3277 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3278 IEnd = IdResolver.end();
3280 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3281 if (isSameEntity(Existing, D))
3282 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3283 TypedefNameForLinkage);
3285 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3286 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3287 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3288 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3289 if (isSameEntity(Existing, D))
3290 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3291 TypedefNameForLinkage);
3294 // Not in a mergeable context.
3295 return FindExistingResult(Reader);
3298 // If this declaration is from a merged context, make a note that we need to
3299 // check that the canonical definition of that context contains the decl.
3301 // FIXME: We should do something similar if we merge two definitions of the
3302 // same template specialization into the same CXXRecordDecl.
3303 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3304 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3305 MergedDCIt->second == D->getDeclContext())
3306 Reader.PendingOdrMergeChecks.push_back(D);
3308 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3309 AnonymousDeclNumber, TypedefNameForLinkage);
3312 template<typename DeclT>
3313 Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3314 return D->RedeclLink.getLatestNotUpdated();
3317 Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3318 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3321 Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3324 switch (D->getKind()) {
3325 #define ABSTRACT_DECL(TYPE)
3326 #define DECL(TYPE, BASE) \
3328 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3329 #include "clang/AST/DeclNodes.inc"
3331 llvm_unreachable("unknown decl kind");
3334 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3335 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3338 template<typename DeclT>
3339 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3340 Redeclarable<DeclT> *D,
3341 Decl *Previous, Decl *Canon) {
3342 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3343 D->First = cast<DeclT>(Previous)->First;
3349 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3350 Redeclarable<VarDecl> *D,
3351 Decl *Previous, Decl *Canon) {
3352 auto *VD = static_cast<VarDecl *>(D);
3353 auto *PrevVD = cast<VarDecl>(Previous);
3354 D->RedeclLink.setPrevious(PrevVD);
3355 D->First = PrevVD->First;
3357 // We should keep at most one definition on the chain.
3358 // FIXME: Cache the definition once we've found it. Building a chain with
3359 // N definitions currently takes O(N^2) time here.
3360 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3361 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3362 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3363 Reader.mergeDefinitionVisibility(CurD, VD);
3364 VD->demoteThisDefinitionToDeclaration();
3372 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3373 Redeclarable<FunctionDecl> *D,
3374 Decl *Previous, Decl *Canon) {
3375 auto *FD = static_cast<FunctionDecl *>(D);
3376 auto *PrevFD = cast<FunctionDecl>(Previous);
3378 FD->RedeclLink.setPrevious(PrevFD);
3379 FD->First = PrevFD->First;
3381 // If the previous declaration is an inline function declaration, then this
3382 // declaration is too.
3383 if (PrevFD->IsInline != FD->IsInline) {
3384 // FIXME: [dcl.fct.spec]p4:
3385 // If a function with external linkage is declared inline in one
3386 // translation unit, it shall be declared inline in all translation
3387 // units in which it appears.
3389 // Be careful of this case:
3392 // template<typename T> struct X { void f(); };
3393 // template<typename T> inline void X<T>::f() {}
3395 // module B instantiates the declaration of X<int>::f
3396 // module C instantiates the definition of X<int>::f
3398 // If module B and C are merged, we do not have a violation of this rule.
3399 FD->IsInline = true;
3402 // If we need to propagate an exception specification along the redecl
3403 // chain, make a note of that so that we can do so later.
3404 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3405 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3406 if (FPT && PrevFPT) {
3407 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3408 bool WasUnresolved =
3409 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3410 if (IsUnresolved != WasUnresolved)
3411 Reader.PendingExceptionSpecUpdates.insert(
3412 std::make_pair(Canon, IsUnresolved ? PrevFD : FD));
3416 } // namespace clang
3418 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3419 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3422 /// Inherit the default template argument from \p From to \p To. Returns
3423 /// \c false if there is no default template for \p From.
3424 template <typename ParmDecl>
3425 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3427 auto *To = cast<ParmDecl>(ToD);
3428 if (!From->hasDefaultArgument())
3430 To->setInheritedDefaultArgument(Context, From);
3434 static void inheritDefaultTemplateArguments(ASTContext &Context,
3437 auto *FromTP = From->getTemplateParameters();
3438 auto *ToTP = To->getTemplateParameters();
3439 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3441 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3442 NamedDecl *FromParam = FromTP->getParam(I);
3443 NamedDecl *ToParam = ToTP->getParam(I);
3445 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3446 inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3447 else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3448 inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3450 inheritDefaultTemplateArgument(
3451 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3455 void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3456 Decl *Previous, Decl *Canon) {
3457 assert(D && Previous);
3459 switch (D->getKind()) {
3460 #define ABSTRACT_DECL(TYPE)
3461 #define DECL(TYPE, BASE) \
3463 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3465 #include "clang/AST/DeclNodes.inc"
3468 // If the declaration was visible in one module, a redeclaration of it in
3469 // another module remains visible even if it wouldn't be visible by itself.
3471 // FIXME: In this case, the declaration should only be visible if a module
3472 // that makes it visible has been imported.
3473 D->IdentifierNamespace |=
3474 Previous->IdentifierNamespace &
3475 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3477 // If the declaration declares a template, it may inherit default arguments
3478 // from the previous declaration.
3479 if (auto *TD = dyn_cast<TemplateDecl>(D))
3480 inheritDefaultTemplateArguments(Reader.getContext(),
3481 cast<TemplateDecl>(Previous), TD);
3484 template<typename DeclT>
3485 void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3486 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3489 void ASTDeclReader::attachLatestDeclImpl(...) {
3490 llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3493 void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3494 assert(D && Latest);
3496 switch (D->getKind()) {
3497 #define ABSTRACT_DECL(TYPE)
3498 #define DECL(TYPE, BASE) \
3500 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3502 #include "clang/AST/DeclNodes.inc"
3506 template<typename DeclT>
3507 void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3508 D->RedeclLink.markIncomplete();
3511 void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3512 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3515 void ASTReader::markIncompleteDeclChain(Decl *D) {
3516 switch (D->getKind()) {
3517 #define ABSTRACT_DECL(TYPE)
3518 #define DECL(TYPE, BASE) \
3520 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3522 #include "clang/AST/DeclNodes.inc"
3526 /// Read the declaration at the given offset from the AST file.
3527 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3528 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3529 SourceLocation DeclLoc;
3530 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3531 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3532 // Keep track of where we are in the stream, then jump back there
3533 // after reading this declaration.
3534 SavedStreamPosition SavedPosition(DeclsCursor);
3536 ReadingKindTracker ReadingKind(Read_Decl, *this);
3538 // Note that we are loading a declaration record.
3539 Deserializing ADecl(this);
3541 DeclsCursor.JumpToBit(Loc.Offset);
3542 ASTRecordReader Record(*this, *Loc.F);
3543 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3544 unsigned Code = DeclsCursor.ReadCode();
3546 ASTContext &Context = getContext();
3548 switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3549 case DECL_CONTEXT_LEXICAL:
3550 case DECL_CONTEXT_VISIBLE:
3551 llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3553 D = TypedefDecl::CreateDeserialized(Context, ID);
3555 case DECL_TYPEALIAS:
3556 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3559 D = EnumDecl::CreateDeserialized(Context, ID);
3562 D = RecordDecl::CreateDeserialized(Context, ID);
3564 case DECL_ENUM_CONSTANT:
3565 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3568 D = FunctionDecl::CreateDeserialized(Context, ID);
3570 case DECL_LINKAGE_SPEC:
3571 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3574 D = ExportDecl::CreateDeserialized(Context, ID);
3577 D = LabelDecl::CreateDeserialized(Context, ID);
3579 case DECL_NAMESPACE:
3580 D = NamespaceDecl::CreateDeserialized(Context, ID);
3582 case DECL_NAMESPACE_ALIAS:
3583 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3586 D = UsingDecl::CreateDeserialized(Context, ID);
3588 case DECL_USING_PACK:
3589 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3591 case DECL_USING_SHADOW:
3592 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3594 case DECL_CONSTRUCTOR_USING_SHADOW:
3595 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3597 case DECL_USING_DIRECTIVE:
3598 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3600 case DECL_UNRESOLVED_USING_VALUE:
3601 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3603 case DECL_UNRESOLVED_USING_TYPENAME:
3604 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3606 case DECL_CXX_RECORD:
3607 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3609 case DECL_CXX_DEDUCTION_GUIDE:
3610 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3612 case DECL_CXX_METHOD:
3613 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3615 case DECL_CXX_CONSTRUCTOR:
3616 D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3618 case DECL_CXX_INHERITED_CONSTRUCTOR:
3619 D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3621 case DECL_CXX_DESTRUCTOR:
3622 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3624 case DECL_CXX_CONVERSION:
3625 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3627 case DECL_ACCESS_SPEC:
3628 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3631 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3633 case DECL_FRIEND_TEMPLATE:
3634 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3636 case DECL_CLASS_TEMPLATE:
3637 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3639 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3640 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3642 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3643 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3645 case DECL_VAR_TEMPLATE:
3646 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3648 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3649 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3651 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3652 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3654 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3655 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3657 case DECL_FUNCTION_TEMPLATE:
3658 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3660 case DECL_TEMPLATE_TYPE_PARM:
3661 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3663 case DECL_NON_TYPE_TEMPLATE_PARM:
3664 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3666 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3667 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3670 case DECL_TEMPLATE_TEMPLATE_PARM:
3671 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3673 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3674 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3677 case DECL_TYPE_ALIAS_TEMPLATE:
3678 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3680 case DECL_STATIC_ASSERT:
3681 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3683 case DECL_OBJC_METHOD:
3684 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3686 case DECL_OBJC_INTERFACE:
3687 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3689 case DECL_OBJC_IVAR:
3690 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3692 case DECL_OBJC_PROTOCOL:
3693 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3695 case DECL_OBJC_AT_DEFS_FIELD:
3696 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3698 case DECL_OBJC_CATEGORY:
3699 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3701 case DECL_OBJC_CATEGORY_IMPL:
3702 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3704 case DECL_OBJC_IMPLEMENTATION:
3705 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3707 case DECL_OBJC_COMPATIBLE_ALIAS:
3708 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3710 case DECL_OBJC_PROPERTY:
3711 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3713 case DECL_OBJC_PROPERTY_IMPL:
3714 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3717 D = FieldDecl::CreateDeserialized(Context, ID);
3719 case DECL_INDIRECTFIELD:
3720 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3723 D = VarDecl::CreateDeserialized(Context, ID);
3725 case DECL_IMPLICIT_PARAM:
3726 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3729 D = ParmVarDecl::CreateDeserialized(Context, ID);
3731 case DECL_DECOMPOSITION:
3732 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3735 D = BindingDecl::CreateDeserialized(Context, ID);
3737 case DECL_FILE_SCOPE_ASM:
3738 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3741 D = BlockDecl::CreateDeserialized(Context, ID);
3743 case DECL_MS_PROPERTY:
3744 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3747 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3749 case DECL_CXX_BASE_SPECIFIERS:
3750 Error("attempt to read a C++ base-specifier record as a declaration");
3752 case DECL_CXX_CTOR_INITIALIZERS:
3753 Error("attempt to read a C++ ctor initializer record as a declaration");
3756 // Note: last entry of the ImportDecl record is the number of stored source
3758 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3760 case DECL_OMP_THREADPRIVATE:
3761 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3763 case DECL_OMP_DECLARE_REDUCTION:
3764 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
3766 case DECL_OMP_CAPTUREDEXPR:
3767 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3769 case DECL_PRAGMA_COMMENT:
3770 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3772 case DECL_PRAGMA_DETECT_MISMATCH:
3773 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
3777 D = EmptyDecl::CreateDeserialized(Context, ID);
3779 case DECL_OBJC_TYPE_PARAM:
3780 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3784 assert(D && "Unknown declaration reading AST file");
3785 LoadedDecl(Index, D);
3786 // Set the DeclContext before doing any deserialization, to make sure internal
3787 // calls to Decl::getASTContext() by Decl's methods will find the
3788 // TranslationUnitDecl without crashing.
3789 D->setDeclContext(Context.getTranslationUnitDecl());
3792 // If this declaration is also a declaration context, get the
3793 // offsets for its tables of lexical and visible declarations.
3794 if (auto *DC = dyn_cast<DeclContext>(D)) {
3795 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3796 if (Offsets.first &&
3797 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3799 if (Offsets.second &&
3800 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3803 assert(Record.getIdx() == Record.size());
3805 // Load any relevant update records.
3806 PendingUpdateRecords.push_back(
3807 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3809 // Load the categories after recursive loading is finished.
3810 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3811 // If we already have a definition when deserializing the ObjCInterfaceDecl,
3812 // we put the Decl in PendingDefinitions so we can pull the categories here.
3813 if (Class->isThisDeclarationADefinition() ||
3814 PendingDefinitions.count(Class))
3815 loadObjCCategories(ID, Class);
3817 // If we have deserialized a declaration that has a definition the
3818 // AST consumer might need to know about, queue it.
3819 // We don't pass it to the consumer immediately because we may be in recursive
3820 // loading, and some declarations may still be initializing.
3821 PotentiallyInterestingDecls.push_back(
3822 InterestingDecl(D, Reader.hasPendingBody()));
3827 void ASTReader::PassInterestingDeclsToConsumer() {
3830 if (PassingDeclsToConsumer)
3833 // Guard variable to avoid recursively redoing the process of passing
3834 // decls to consumer.
3835 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3838 // Ensure that we've loaded all potentially-interesting declarations
3839 // that need to be eagerly loaded.
3840 for (auto ID : EagerlyDeserializedDecls)
3842 EagerlyDeserializedDecls.clear();
3844 while (!PotentiallyInterestingDecls.empty()) {
3845 InterestingDecl D = PotentiallyInterestingDecls.front();
3846 PotentiallyInterestingDecls.pop_front();
3847 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3848 PassInterestingDeclToConsumer(D.getDecl());
3852 void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3853 // The declaration may have been modified by files later in the chain.
3854 // If this is the case, read the record containing the updates from each file
3855 // and pass it to ASTDeclReader to make the modifications.
3856 serialization::GlobalDeclID ID = Record.ID;
3858 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3859 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3861 SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3863 if (UpdI != DeclUpdateOffsets.end()) {
3864 auto UpdateOffsets = std::move(UpdI->second);
3865 DeclUpdateOffsets.erase(UpdI);
3867 // Check if this decl was interesting to the consumer. If we just loaded
3868 // the declaration, then we know it was interesting and we skip the call
3869 // to isConsumerInterestedIn because it is unsafe to call in the
3870 // current ASTReader state.
3871 bool WasInteresting =
3872 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
3873 for (auto &FileAndOffset : UpdateOffsets) {
3874 ModuleFile *F = FileAndOffset.first;
3875 uint64_t Offset = FileAndOffset.second;
3876 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3877 SavedStreamPosition SavedPosition(Cursor);
3878 Cursor.JumpToBit(Offset);
3879 unsigned Code = Cursor.ReadCode();
3880 ASTRecordReader Record(*this, *F);
3881 unsigned RecCode = Record.readRecord(Cursor, Code);
3883 assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3885 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
3887 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
3889 // We might have made this declaration interesting. If so, remember that
3890 // we need to hand it off to the consumer.
3891 if (!WasInteresting &&
3892 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
3893 PotentiallyInterestingDecls.push_back(
3894 InterestingDecl(D, Reader.hasPendingBody()));
3895 WasInteresting = true;
3899 // Add the lazy specializations to the template.
3900 assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||
3901 isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&
3902 "Must not have pending specializations");
3903 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
3904 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
3905 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
3906 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
3907 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
3908 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
3909 PendingLazySpecializationIDs.clear();
3911 // Load the pending visible updates for this decl context, if it has any.
3912 auto I = PendingVisibleUpdates.find(ID);
3913 if (I != PendingVisibleUpdates.end()) {
3914 auto VisibleUpdates = std::move(I->second);
3915 PendingVisibleUpdates.erase(I);
3917 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
3918 for (const auto &Update : VisibleUpdates)
3919 Lookups[DC].Table.add(
3920 Update.Mod, Update.Data,
3921 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
3922 DC->setHasExternalVisibleStorage(true);
3926 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
3927 // Attach FirstLocal to the end of the decl chain.
3928 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
3929 if (FirstLocal != CanonDecl) {
3930 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
3931 ASTDeclReader::attachPreviousDecl(
3932 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
3937 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
3941 // Load the list of other redeclarations from this module file.
3942 ModuleFile *M = getOwningModuleFile(FirstLocal);
3943 assert(M && "imported decl from no module file");
3945 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
3946 SavedStreamPosition SavedPosition(Cursor);
3947 Cursor.JumpToBit(LocalOffset);
3950 unsigned Code = Cursor.ReadCode();
3951 unsigned RecCode = Cursor.readRecord(Code, Record);
3953 assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
3955 // FIXME: We have several different dispatches on decl kind here; maybe
3956 // we should instead generate one loop per kind and dispatch up-front?
3957 Decl *MostRecent = FirstLocal;
3958 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
3959 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
3960 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
3963 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
3968 /// Given an ObjC interface, goes through the modules and links to the
3969 /// interface all the categories for it.
3970 class ObjCCategoriesVisitor {
3972 ObjCInterfaceDecl *Interface;
3973 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
3974 ObjCCategoryDecl *Tail = nullptr;
3975 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
3976 serialization::GlobalDeclID InterfaceID;
3977 unsigned PreviousGeneration;
3979 void add(ObjCCategoryDecl *Cat) {
3980 // Only process each category once.
3981 if (!Deserialized.erase(Cat))
3984 // Check for duplicate categories.
3985 if (Cat->getDeclName()) {
3986 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
3988 Reader.getOwningModuleFile(Existing)
3989 != Reader.getOwningModuleFile(Cat)) {
3990 // FIXME: We should not warn for duplicates in diamond:
3998 // If there are duplicates in ML/MR, there will be warning when
3999 // creating MB *and* when importing MB. We should not warn when
4001 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4002 << Interface->getDeclName() << Cat->getDeclName();
4003 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4004 } else if (!Existing) {
4005 // Record this category.
4010 // Add this category to the end of the chain.
4012 ASTDeclReader::setNextObjCCategory(Tail, Cat);
4014 Interface->setCategoryListRaw(Cat);
4019 ObjCCategoriesVisitor(ASTReader &Reader,
4020 ObjCInterfaceDecl *Interface,
4021 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4022 serialization::GlobalDeclID InterfaceID,
4023 unsigned PreviousGeneration)
4024 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4025 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4026 // Populate the name -> category map with the set of known categories.
4027 for (auto *Cat : Interface->known_categories()) {
4028 if (Cat->getDeclName())
4029 NameCategoryMap[Cat->getDeclName()] = Cat;
4031 // Keep track of the tail of the category list.
4036 bool operator()(ModuleFile &M) {
4037 // If we've loaded all of the category information we care about from
4038 // this module file, we're done.
4039 if (M.Generation <= PreviousGeneration)
4042 // Map global ID of the definition down to the local ID used in this
4043 // module file. If there is no such mapping, we'll find nothing here
4044 // (or in any module it imports).
4045 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4049 // Perform a binary search to find the local redeclarations for this
4050 // declaration (if any).
4051 const ObjCCategoriesInfo Compare = { LocalID, 0 };
4052 const ObjCCategoriesInfo *Result
4053 = std::lower_bound(M.ObjCCategoriesMap,
4054 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
4056 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4057 Result->DefinitionID != LocalID) {
4058 // We didn't find anything. If the class definition is in this module
4059 // file, then the module files it depends on cannot have any categories,
4060 // so suppress further lookup.
4061 return Reader.isDeclIDFromModule(InterfaceID, M);
4064 // We found something. Dig out all of the categories.
4065 unsigned Offset = Result->Offset;
4066 unsigned N = M.ObjCCategories[Offset];
4067 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4068 for (unsigned I = 0; I != N; ++I)
4069 add(cast_or_null<ObjCCategoryDecl>(
4070 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4077 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4078 ObjCInterfaceDecl *D,
4079 unsigned PreviousGeneration) {
4080 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4081 PreviousGeneration);
4082 ModuleMgr.visit(Visitor);
4085 template<typename DeclT, typename Fn>
4086 static void forAllLaterRedecls(DeclT *D, Fn F) {
4089 // Check whether we've already merged D into its redeclaration chain.
4090 // MostRecent may or may not be nullptr if D has not been merged. If
4091 // not, walk the merged redecl chain and see if it's there.
4092 auto *MostRecent = D->getMostRecentDecl();
4094 for (auto *Redecl = MostRecent; Redecl && !Found;
4095 Redecl = Redecl->getPreviousDecl())
4096 Found = (Redecl == D);
4098 // If this declaration is merged, apply the functor to all later decls.
4100 for (auto *Redecl = MostRecent; Redecl != D;
4101 Redecl = Redecl->getPreviousDecl())
4106 void ASTDeclReader::UpdateDecl(Decl *D,
4107 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4108 while (Record.getIdx() < Record.size()) {
4109 switch ((DeclUpdateKind)Record.readInt()) {
4110 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
4111 auto *RD = cast<CXXRecordDecl>(D);
4112 // FIXME: If we also have an update record for instantiating the
4113 // definition of D, we need that to happen before we get here.
4114 Decl *MD = Record.readDecl();
4115 assert(MD && "couldn't read decl from update record");
4116 // FIXME: We should call addHiddenDecl instead, to add the member
4117 // to its DeclContext.
4118 RD->addedMember(MD);
4122 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
4123 // It will be added to the template's lazy specialization set.
4124 PendingLazySpecializationIDs.push_back(ReadDeclID());
4127 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
4128 auto *Anon = ReadDeclAs<NamespaceDecl>();
4130 // Each module has its own anonymous namespace, which is disjoint from
4131 // any other module's anonymous namespaces, so don't attach the anonymous
4132 // namespace at all.
4133 if (!Record.isModule()) {
4134 if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4135 TU->setAnonymousNamespace(Anon);
4137 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4142 case UPD_CXX_ADDED_VAR_DEFINITION: {
4143 auto *VD = cast<VarDecl>(D);
4144 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4145 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4146 uint64_t Val = Record.readInt();
4147 if (Val && !VD->getInit()) {
4148 VD->setInit(Record.readExpr());
4149 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4150 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4151 Eval->CheckedICE = true;
4152 Eval->IsICE = Val == 3;
4158 case UPD_CXX_POINT_OF_INSTANTIATION: {
4159 SourceLocation POI = Record.readSourceLocation();
4160 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4161 VTSD->setPointOfInstantiation(POI);
4162 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4163 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4165 auto *FD = cast<FunctionDecl>(D);
4166 if (auto *FTSInfo = FD->TemplateOrSpecialization
4167 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4168 FTSInfo->setPointOfInstantiation(POI);
4170 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4171 ->setPointOfInstantiation(POI);
4176 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4177 auto *Param = cast<ParmVarDecl>(D);
4179 // We have to read the default argument regardless of whether we use it
4180 // so that hypothetical further update records aren't messed up.
4181 // TODO: Add a function to skip over the next expr record.
4182 auto *DefaultArg = Record.readExpr();
4184 // Only apply the update if the parameter still has an uninstantiated
4185 // default argument.
4186 if (Param->hasUninstantiatedDefaultArg())
4187 Param->setDefaultArg(DefaultArg);
4191 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4192 auto *FD = cast<FieldDecl>(D);
4193 auto *DefaultInit = Record.readExpr();
4195 // Only apply the update if the field still has an uninstantiated
4196 // default member initializer.
4197 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4199 FD->setInClassInitializer(DefaultInit);
4201 // Instantiation failed. We can get here if we serialized an AST for
4202 // an invalid program.
4203 FD->removeInClassInitializer();
4208 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4209 auto *FD = cast<FunctionDecl>(D);
4210 if (Reader.PendingBodies[FD]) {
4211 // FIXME: Maybe check for ODR violations.
4212 // It's safe to stop now because this update record is always last.
4216 if (Record.readInt()) {
4217 // Maintain AST consistency: any later redeclarations of this function
4218 // are inline if this one is. (We might have merged another declaration
4220 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4221 FD->setImplicitlyInline();
4224 FD->setInnerLocStart(ReadSourceLocation());
4225 ReadFunctionDefinition(FD);
4226 assert(Record.getIdx() == Record.size() && "lazy body must be last");
4230 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4231 auto *RD = cast<CXXRecordDecl>(D);
4232 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4233 bool HadRealDefinition =
4234 OldDD && (OldDD->Definition != RD ||
4235 !Reader.PendingFakeDefinitionData.count(OldDD));
4236 RD->setParamDestroyedInCallee(Record.readInt());
4237 RD->setArgPassingRestrictions(
4238 (RecordDecl::ArgPassingKind)Record.readInt());
4239 ReadCXXRecordDefinition(RD, /*Update*/true);
4241 // Visible update is handled separately.
4242 uint64_t LexicalOffset = ReadLocalOffset();
4243 if (!HadRealDefinition && LexicalOffset) {
4244 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4245 Reader.PendingFakeDefinitionData.erase(OldDD);
4248 auto TSK = (TemplateSpecializationKind)Record.readInt();
4249 SourceLocation POI = ReadSourceLocation();
4250 if (MemberSpecializationInfo *MSInfo =
4251 RD->getMemberSpecializationInfo()) {
4252 MSInfo->setTemplateSpecializationKind(TSK);
4253 MSInfo->setPointOfInstantiation(POI);
4255 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4256 Spec->setTemplateSpecializationKind(TSK);
4257 Spec->setPointOfInstantiation(POI);
4259 if (Record.readInt()) {
4261 ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4262 SmallVector<TemplateArgument, 8> TemplArgs;
4263 Record.readTemplateArgumentList(TemplArgs);
4264 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4265 Reader.getContext(), TemplArgs);
4267 // FIXME: If we already have a partial specialization set,
4268 // check that it matches.
4269 if (!Spec->getSpecializedTemplateOrPartial()
4270 .is<ClassTemplatePartialSpecializationDecl *>())
4271 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4275 RD->setTagKind((TagTypeKind)Record.readInt());
4276 RD->setLocation(ReadSourceLocation());
4277 RD->setLocStart(ReadSourceLocation());
4278 RD->setBraceRange(ReadSourceRange());
4280 if (Record.readInt()) {
4282 Record.readAttributes(Attrs);
4283 // If the declaration already has attributes, we assume that some other
4284 // AST file already loaded them.
4286 D->setAttrsImpl(Attrs, Reader.getContext());
4291 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4292 // Set the 'operator delete' directly to avoid emitting another update
4294 auto *Del = ReadDeclAs<FunctionDecl>();
4295 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4296 auto *ThisArg = Record.readExpr();
4297 // FIXME: Check consistency if we have an old and new operator delete.
4298 if (!First->OperatorDelete) {
4299 First->OperatorDelete = Del;
4300 First->OperatorDeleteThisArg = ThisArg;
4305 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4306 FunctionProtoType::ExceptionSpecInfo ESI;
4307 SmallVector<QualType, 8> ExceptionStorage;
4308 Record.readExceptionSpec(ExceptionStorage, ESI);
4310 // Update this declaration's exception specification, if needed.
4311 auto *FD = cast<FunctionDecl>(D);
4312 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4313 // FIXME: If the exception specification is already present, check that it
4315 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4316 FD->setType(Reader.getContext().getFunctionType(
4317 FPT->getReturnType(), FPT->getParamTypes(),
4318 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4320 // When we get to the end of deserializing, see if there are other decls
4321 // that we need to propagate this exception specification onto.
4322 Reader.PendingExceptionSpecUpdates.insert(
4323 std::make_pair(FD->getCanonicalDecl(), FD));
4328 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4329 // FIXME: Also do this when merging redecls.
4330 QualType DeducedResultType = Record.readType();
4331 for (auto *Redecl : merged_redecls(D)) {
4332 // FIXME: If the return type is already deduced, check that it matches.
4333 auto *FD = cast<FunctionDecl>(Redecl);
4334 Reader.getContext().adjustDeducedFunctionResultType(FD,
4340 case UPD_DECL_MARKED_USED:
4341 // Maintain AST consistency: any later redeclarations are used too.
4342 D->markUsed(Reader.getContext());
4345 case UPD_MANGLING_NUMBER:
4346 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4350 case UPD_STATIC_LOCAL_NUMBER:
4351 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4355 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4356 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4357 ReadSourceRange()));
4360 case UPD_DECL_EXPORTED: {
4361 unsigned SubmoduleID = readSubmoduleID();
4362 auto *Exported = cast<NamedDecl>(D);
4363 if (auto *TD = dyn_cast<TagDecl>(Exported))
4364 Exported = TD->getDefinition();
4365 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4366 if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
4367 Reader.getContext().mergeDefinitionIntoModule(cast<NamedDecl>(Exported),
4369 Reader.PendingMergedDefinitionsToDeduplicate.insert(
4370 cast<NamedDecl>(Exported));
4371 } else if (Owner && Owner->NameVisibility != Module::AllVisible) {
4372 // If Owner is made visible at some later point, make this declaration
4374 Reader.HiddenNamesMap[Owner].push_back(Exported);
4376 // The declaration is now visible.
4377 Exported->setVisibleDespiteOwningModule();
4382 case UPD_DECL_MARKED_OPENMP_DECLARETARGET:
4383 case UPD_ADDED_ATTR_TO_RECORD:
4385 Record.readAttributes(Attrs);
4386 assert(Attrs.size() == 1);
4387 D->addAttr(Attrs[0]);