1//===- ASTReaderDecl.cpp - Decl Deserialization ---------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the ASTReader::readDeclRecord method, which is the
10// entrypoint for loading a decl.
11//
12//===----------------------------------------------------------------------===//
13
14#include "ASTCommon.h"
15#include "ASTReaderInternals.h"
16#include "clang/AST/ASTConcept.h"
17#include "clang/AST/ASTContext.h"
18#include "clang/AST/ASTStructuralEquivalence.h"
19#include "clang/AST/Attr.h"
20#include "clang/AST/AttrIterator.h"
21#include "clang/AST/Decl.h"
22#include "clang/AST/DeclBase.h"
23#include "clang/AST/DeclCXX.h"
24#include "clang/AST/DeclFriend.h"
25#include "clang/AST/DeclObjC.h"
26#include "clang/AST/DeclOpenMP.h"
27#include "clang/AST/DeclTemplate.h"
28#include "clang/AST/DeclVisitor.h"
29#include "clang/AST/DeclarationName.h"
30#include "clang/AST/Expr.h"
31#include "clang/AST/ExternalASTSource.h"
32#include "clang/AST/LambdaCapture.h"
33#include "clang/AST/NestedNameSpecifier.h"
34#include "clang/AST/OpenMPClause.h"
35#include "clang/AST/Redeclarable.h"
36#include "clang/AST/Stmt.h"
37#include "clang/AST/TemplateBase.h"
38#include "clang/AST/Type.h"
39#include "clang/AST/UnresolvedSet.h"
40#include "clang/Basic/AttrKinds.h"
41#include "clang/Basic/DiagnosticSema.h"
42#include "clang/Basic/ExceptionSpecificationType.h"
43#include "clang/Basic/IdentifierTable.h"
44#include "clang/Basic/LLVM.h"
45#include "clang/Basic/Lambda.h"
46#include "clang/Basic/LangOptions.h"
47#include "clang/Basic/Linkage.h"
48#include "clang/Basic/Module.h"
49#include "clang/Basic/PragmaKinds.h"
50#include "clang/Basic/SourceLocation.h"
51#include "clang/Basic/Specifiers.h"
52#include "clang/Sema/IdentifierResolver.h"
53#include "clang/Serialization/ASTBitCodes.h"
54#include "clang/Serialization/ASTRecordReader.h"
55#include "clang/Serialization/ContinuousRangeMap.h"
56#include "clang/Serialization/ModuleFile.h"
57#include "llvm/ADT/DenseMap.h"
58#include "llvm/ADT/FoldingSet.h"
59#include "llvm/ADT/SmallPtrSet.h"
60#include "llvm/ADT/SmallVector.h"
61#include "llvm/ADT/iterator_range.h"
62#include "llvm/Bitstream/BitstreamReader.h"
63#include "llvm/Support/ErrorHandling.h"
64#include "llvm/Support/SaveAndRestore.h"
65#include <algorithm>
66#include <cassert>
67#include <cstdint>
68#include <cstring>
69#include <string>
70#include <utility>
71
72using namespace clang;
73using namespace serialization;
74
75//===----------------------------------------------------------------------===//
76// Declaration Merging
77//===----------------------------------------------------------------------===//
78
79namespace {
80/// Results from loading a RedeclarableDecl.
81class RedeclarableResult {
82 Decl *MergeWith;
83 GlobalDeclID FirstID;
84 bool IsKeyDecl;
85
86public:
87 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
88 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
89
90 /// Retrieve the first ID.
91 GlobalDeclID getFirstID() const { return FirstID; }
92
93 /// Is this declaration a key declaration?
94 bool isKeyDecl() const { return IsKeyDecl; }
95
96 /// Get a known declaration that this should be merged with, if
97 /// any.
98 Decl *getKnownMergeTarget() const { return MergeWith; }
99};
100} // namespace
101
102namespace clang {
103class ASTDeclMerger {
104 ASTReader &Reader;
105
106public:
107 ASTDeclMerger(ASTReader &Reader) : Reader(Reader) {}
108
109 void mergeLambda(CXXRecordDecl *D, RedeclarableResult &Redecl, Decl &Context,
110 unsigned Number);
111
112 /// \param KeyDeclID the decl ID of the key declaration \param D.
113 /// GlobalDeclID() if \param is not a key declaration.
114 /// See the comments of ASTReader::KeyDecls for the explanation
115 /// of key declaration.
116 template <typename T>
117 void mergeRedeclarableImpl(Redeclarable<T> *D, T *Existing,
118 GlobalDeclID KeyDeclID);
119
120 template <typename T>
121 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
122 RedeclarableResult &Redecl) {
123 mergeRedeclarableImpl(
124 D, Existing, Redecl.isKeyDecl() ? Redecl.getFirstID() : GlobalDeclID());
125 }
126
127 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
128 RedeclarableTemplateDecl *Existing, bool IsKeyDecl);
129
130 void MergeDefinitionData(CXXRecordDecl *D,
131 struct CXXRecordDecl::DefinitionData &&NewDD);
132 void MergeDefinitionData(ObjCInterfaceDecl *D,
133 struct ObjCInterfaceDecl::DefinitionData &&NewDD);
134 void MergeDefinitionData(ObjCProtocolDecl *D,
135 struct ObjCProtocolDecl::DefinitionData &&NewDD);
136};
137} // namespace clang
138
139//===----------------------------------------------------------------------===//
140// Declaration deserialization
141//===----------------------------------------------------------------------===//
142
143namespace clang {
144class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
145 ASTReader &Reader;
146 ASTDeclMerger MergeImpl;
147 ASTRecordReader &Record;
148 ASTReader::RecordLocation Loc;
149 const GlobalDeclID ThisDeclID;
150 const SourceLocation ThisDeclLoc;
151
152 using RecordData = ASTReader::RecordData;
153
154 TypeID DeferredTypeID = 0;
155 unsigned AnonymousDeclNumber = 0;
156 GlobalDeclID NamedDeclForTagDecl = GlobalDeclID();
157 IdentifierInfo *TypedefNameForLinkage = nullptr;
158
159 /// A flag to carry the information for a decl from the entity is
160 /// used. We use it to delay the marking of the canonical decl as used until
161 /// the entire declaration is deserialized and merged.
162 bool IsDeclMarkedUsed = false;
163
164 uint64_t GetCurrentCursorOffset();
165
166 uint64_t ReadLocalOffset() {
167 uint64_t LocalOffset = Record.readInt();
168 assert(LocalOffset < Loc.Offset && "offset point after current record");
169 return LocalOffset ? Loc.Offset - LocalOffset : 0;
170 }
171
172 uint64_t ReadGlobalOffset() {
173 uint64_t Local = ReadLocalOffset();
174 return Local ? Record.getGlobalBitOffset(LocalOffset: Local) : 0;
175 }
176
177 SourceLocation readSourceLocation() { return Record.readSourceLocation(); }
178
179 SourceRange readSourceRange() { return Record.readSourceRange(); }
180
181 TypeSourceInfo *readTypeSourceInfo() { return Record.readTypeSourceInfo(); }
182
183 GlobalDeclID readDeclID() { return Record.readDeclID(); }
184
185 std::string readString() { return Record.readString(); }
186
187 Decl *readDecl() { return Record.readDecl(); }
188
189 template <typename T> T *readDeclAs() { return Record.readDeclAs<T>(); }
190
191 serialization::SubmoduleID readSubmoduleID() {
192 if (Record.getIdx() == Record.size())
193 return 0;
194
195 return Record.getGlobalSubmoduleID(LocalID: Record.readInt());
196 }
197
198 Module *readModule() { return Record.getSubmodule(GlobalID: readSubmoduleID()); }
199
200 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update,
201 Decl *LambdaContext = nullptr,
202 unsigned IndexInLambdaContext = 0);
203 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
204 const CXXRecordDecl *D, Decl *LambdaContext,
205 unsigned IndexInLambdaContext);
206 void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
207 void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
208
209 static DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
210
211 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
212 DeclContext *DC, unsigned Index);
213 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
214 unsigned Index, NamedDecl *D);
215
216 /// Commit to a primary definition of the class RD, which is known to be
217 /// a definition of the class. We might not have read the definition data
218 /// for it yet. If we haven't then allocate placeholder definition data
219 /// now too.
220 static CXXRecordDecl *getOrFakePrimaryClassDefinition(ASTReader &Reader,
221 CXXRecordDecl *RD);
222
223 /// Class used to capture the result of searching for an existing
224 /// declaration of a specific kind and name, along with the ability
225 /// to update the place where this result was found (the declaration
226 /// chain hanging off an identifier or the DeclContext we searched in)
227 /// if requested.
228 class FindExistingResult {
229 ASTReader &Reader;
230 NamedDecl *New = nullptr;
231 NamedDecl *Existing = nullptr;
232 bool AddResult = false;
233 unsigned AnonymousDeclNumber = 0;
234 IdentifierInfo *TypedefNameForLinkage = nullptr;
235
236 public:
237 FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
238
239 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
240 unsigned AnonymousDeclNumber,
241 IdentifierInfo *TypedefNameForLinkage)
242 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
243 AnonymousDeclNumber(AnonymousDeclNumber),
244 TypedefNameForLinkage(TypedefNameForLinkage) {}
245
246 FindExistingResult(FindExistingResult &&Other)
247 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
248 AddResult(Other.AddResult),
249 AnonymousDeclNumber(Other.AnonymousDeclNumber),
250 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
251 Other.AddResult = false;
252 }
253
254 FindExistingResult &operator=(FindExistingResult &&) = delete;
255 ~FindExistingResult();
256
257 /// Suppress the addition of this result into the known set of
258 /// names.
259 void suppress() { AddResult = false; }
260
261 operator NamedDecl *() const { return Existing; }
262
263 template <typename T> operator T *() const {
264 return dyn_cast_or_null<T>(Existing);
265 }
266 };
267
268 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
269 DeclContext *DC);
270 FindExistingResult findExisting(NamedDecl *D);
271
272public:
273 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
274 ASTReader::RecordLocation Loc, GlobalDeclID thisDeclID,
275 SourceLocation ThisDeclLoc)
276 : Reader(Reader), MergeImpl(Reader), Record(Record), Loc(Loc),
277 ThisDeclID(thisDeclID), ThisDeclLoc(ThisDeclLoc) {}
278
279 template <typename DeclT>
280 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
281 static Decl *getMostRecentDeclImpl(...);
282 static Decl *getMostRecentDecl(Decl *D);
283
284 template <typename DeclT>
285 static void attachPreviousDeclImpl(ASTReader &Reader, Redeclarable<DeclT> *D,
286 Decl *Previous, Decl *Canon);
287 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
288 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
289 Decl *Canon);
290
291 static void checkMultipleDefinitionInNamedModules(ASTReader &Reader, Decl *D,
292 Decl *Previous);
293
294 template <typename DeclT>
295 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
296 static void attachLatestDeclImpl(...);
297 static void attachLatestDecl(Decl *D, Decl *latest);
298
299 template <typename DeclT>
300 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
301 static void markIncompleteDeclChainImpl(...);
302
303 void ReadSpecializations(ModuleFile &M, Decl *D,
304 llvm::BitstreamCursor &DeclsCursor, bool IsPartial);
305
306 void ReadFunctionDefinition(FunctionDecl *FD);
307 void Visit(Decl *D);
308
309 void UpdateDecl(Decl *D);
310
311 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
312 ObjCCategoryDecl *Next) {
313 Cat->NextClassCategory = Next;
314 }
315
316 void VisitDecl(Decl *D);
317 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
318 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
319 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
320 void VisitNamedDecl(NamedDecl *ND);
321 void VisitLabelDecl(LabelDecl *LD);
322 void VisitNamespaceDecl(NamespaceDecl *D);
323 void VisitHLSLBufferDecl(HLSLBufferDecl *D);
324 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
325 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
326 void VisitTypeDecl(TypeDecl *TD);
327 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
328 void VisitTypedefDecl(TypedefDecl *TD);
329 void VisitTypeAliasDecl(TypeAliasDecl *TD);
330 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
331 void VisitUnresolvedUsingIfExistsDecl(UnresolvedUsingIfExistsDecl *D);
332 RedeclarableResult VisitTagDecl(TagDecl *TD);
333 void VisitEnumDecl(EnumDecl *ED);
334 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
335 void VisitRecordDecl(RecordDecl *RD);
336 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
337 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
338 RedeclarableResult
339 VisitClassTemplateSpecializationDeclImpl(ClassTemplateSpecializationDecl *D);
340
341 void
342 VisitClassTemplateSpecializationDecl(ClassTemplateSpecializationDecl *D) {
343 VisitClassTemplateSpecializationDeclImpl(D);
344 }
345
346 void VisitClassTemplatePartialSpecializationDecl(
347 ClassTemplatePartialSpecializationDecl *D);
348 RedeclarableResult
349 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
350
351 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
352 VisitVarTemplateSpecializationDeclImpl(D);
353 }
354
355 void VisitVarTemplatePartialSpecializationDecl(
356 VarTemplatePartialSpecializationDecl *D);
357 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
358 void VisitValueDecl(ValueDecl *VD);
359 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
360 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
361 void VisitDeclaratorDecl(DeclaratorDecl *DD);
362 void VisitFunctionDecl(FunctionDecl *FD);
363 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
364 void VisitCXXMethodDecl(CXXMethodDecl *D);
365 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
366 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
367 void VisitCXXConversionDecl(CXXConversionDecl *D);
368 void VisitFieldDecl(FieldDecl *FD);
369 void VisitMSPropertyDecl(MSPropertyDecl *FD);
370 void VisitMSGuidDecl(MSGuidDecl *D);
371 void VisitUnnamedGlobalConstantDecl(UnnamedGlobalConstantDecl *D);
372 void VisitTemplateParamObjectDecl(TemplateParamObjectDecl *D);
373 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
374 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
375 void ReadVarDeclInit(VarDecl *VD);
376 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(D: VD); }
377 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
378 void VisitParmVarDecl(ParmVarDecl *PD);
379 void VisitDecompositionDecl(DecompositionDecl *DD);
380 void VisitBindingDecl(BindingDecl *BD);
381 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
382 void VisitTemplateDecl(TemplateDecl *D);
383 void VisitConceptDecl(ConceptDecl *D);
384 void
385 VisitImplicitConceptSpecializationDecl(ImplicitConceptSpecializationDecl *D);
386 void VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D);
387 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
388 void VisitClassTemplateDecl(ClassTemplateDecl *D);
389 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
390 void VisitVarTemplateDecl(VarTemplateDecl *D);
391 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
392 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
393 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
394 void VisitUsingDecl(UsingDecl *D);
395 void VisitUsingEnumDecl(UsingEnumDecl *D);
396 void VisitUsingPackDecl(UsingPackDecl *D);
397 void VisitUsingShadowDecl(UsingShadowDecl *D);
398 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
399 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
400 void VisitExportDecl(ExportDecl *D);
401 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
402 void VisitTopLevelStmtDecl(TopLevelStmtDecl *D);
403 void VisitImportDecl(ImportDecl *D);
404 void VisitAccessSpecDecl(AccessSpecDecl *D);
405 void VisitFriendDecl(FriendDecl *D);
406 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
407 void VisitStaticAssertDecl(StaticAssertDecl *D);
408 void VisitBlockDecl(BlockDecl *BD);
409 void VisitOutlinedFunctionDecl(OutlinedFunctionDecl *D);
410 void VisitCapturedDecl(CapturedDecl *CD);
411 void VisitEmptyDecl(EmptyDecl *D);
412 void VisitLifetimeExtendedTemporaryDecl(LifetimeExtendedTemporaryDecl *D);
413
414 void VisitOpenACCDeclareDecl(OpenACCDeclareDecl *D);
415 void VisitOpenACCRoutineDecl(OpenACCRoutineDecl *D);
416
417 void VisitDeclContext(DeclContext *DC, LookupBlockOffsets &Offsets);
418
419 template <typename T>
420 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
421
422 template <typename T>
423 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl);
424
425 void mergeRedeclarableTemplate(RedeclarableTemplateDecl *D,
426 RedeclarableResult &Redecl);
427
428 template <typename T> void mergeMergeable(Mergeable<T> *D);
429
430 void mergeMergeable(LifetimeExtendedTemporaryDecl *D);
431
432 ObjCTypeParamList *ReadObjCTypeParamList();
433
434 // FIXME: Reorder according to DeclNodes.td?
435 void VisitObjCMethodDecl(ObjCMethodDecl *D);
436 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
437 void VisitObjCContainerDecl(ObjCContainerDecl *D);
438 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
439 void VisitObjCIvarDecl(ObjCIvarDecl *D);
440 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
441 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
442 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
443 void VisitObjCImplDecl(ObjCImplDecl *D);
444 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
445 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
446 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
447 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
448 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
449 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
450 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
451 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
452 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
453 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
454 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
455};
456} // namespace clang
457
458namespace {
459
460/// Iterator over the redeclarations of a declaration that have already
461/// been merged into the same redeclaration chain.
462template <typename DeclT> class MergedRedeclIterator {
463 DeclT *Start = nullptr;
464 DeclT *Canonical = nullptr;
465 DeclT *Current = nullptr;
466
467public:
468 MergedRedeclIterator() = default;
469 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
470
471 DeclT *operator*() { return Current; }
472
473 MergedRedeclIterator &operator++() {
474 if (Current->isFirstDecl()) {
475 Canonical = Current;
476 Current = Current->getMostRecentDecl();
477 } else
478 Current = Current->getPreviousDecl();
479
480 // If we started in the merged portion, we'll reach our start position
481 // eventually. Otherwise, we'll never reach it, but the second declaration
482 // we reached was the canonical declaration, so stop when we see that one
483 // again.
484 if (Current == Start || Current == Canonical)
485 Current = nullptr;
486 return *this;
487 }
488
489 friend bool operator!=(const MergedRedeclIterator &A,
490 const MergedRedeclIterator &B) {
491 return A.Current != B.Current;
492 }
493};
494
495} // namespace
496
497template <typename DeclT>
498static llvm::iterator_range<MergedRedeclIterator<DeclT>>
499merged_redecls(DeclT *D) {
500 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
501 MergedRedeclIterator<DeclT>());
502}
503
504uint64_t ASTDeclReader::GetCurrentCursorOffset() {
505 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
506}
507
508void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
509 if (Record.readInt()) {
510 Reader.DefinitionSource[FD] =
511 Loc.F->Kind == ModuleKind::MK_MainFile ||
512 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
513 }
514 if (auto *CD = dyn_cast<CXXConstructorDecl>(Val: FD)) {
515 CD->setNumCtorInitializers(Record.readInt());
516 if (CD->getNumCtorInitializers())
517 CD->CtorInitializers = ReadGlobalOffset();
518 }
519 // Store the offset of the body so we can lazily load it later.
520 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
521 // For now remember ThisDeclarationWasADefinition only for friend functions.
522 if (FD->getFriendObjectKind())
523 Reader.ThisDeclarationWasADefinitionSet.insert(V: FD);
524}
525
526void ASTDeclReader::Visit(Decl *D) {
527 DeclVisitor<ASTDeclReader, void>::Visit(D);
528
529 // At this point we have deserialized and merged the decl and it is safe to
530 // update its canonical decl to signal that the entire entity is used.
531 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
532 IsDeclMarkedUsed = false;
533
534 if (auto *DD = dyn_cast<DeclaratorDecl>(Val: D)) {
535 if (auto *TInfo = DD->getTypeSourceInfo())
536 Record.readTypeLoc(TL: TInfo->getTypeLoc());
537 }
538
539 if (auto *TD = dyn_cast<TypeDecl>(Val: D)) {
540 // We have a fully initialized TypeDecl. Read its type now.
541 if (isa<TagDecl, TypedefDecl, TypeAliasDecl>(Val: TD))
542 assert(DeferredTypeID == 0 &&
543 "Deferred type not used for TagDecls and Typedefs");
544 else
545 TD->setTypeForDecl(Reader.GetType(ID: DeferredTypeID).getTypePtrOrNull());
546
547 // If this is a tag declaration with a typedef name for linkage, it's safe
548 // to load that typedef now.
549 if (NamedDeclForTagDecl.isValid())
550 cast<TagDecl>(Val: D)->TypedefNameDeclOrQualifier =
551 cast<TypedefNameDecl>(Val: Reader.GetDecl(ID: NamedDeclForTagDecl));
552 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(Val: D)) {
553 // if we have a fully initialized TypeDecl, we can safely read its type now.
554 ID->TypeForDecl = Reader.GetType(ID: DeferredTypeID).getTypePtrOrNull();
555 } else if (auto *FD = dyn_cast<FunctionDecl>(Val: D)) {
556 // FunctionDecl's body was written last after all other Stmts/Exprs.
557 if (Record.readInt())
558 ReadFunctionDefinition(FD);
559 } else if (auto *VD = dyn_cast<VarDecl>(Val: D)) {
560 ReadVarDeclInit(VD);
561 } else if (auto *FD = dyn_cast<FieldDecl>(Val: D)) {
562 if (FD->hasInClassInitializer() && Record.readInt()) {
563 FD->setLazyInClassInitializer(LazyDeclStmtPtr(GetCurrentCursorOffset()));
564 }
565 }
566}
567
568void ASTDeclReader::VisitDecl(Decl *D) {
569 BitsUnpacker DeclBits(Record.readInt());
570 auto ModuleOwnership =
571 (Decl::ModuleOwnershipKind)DeclBits.getNextBits(/*Width=*/3);
572 D->setReferenced(DeclBits.getNextBit());
573 D->Used = DeclBits.getNextBit();
574 IsDeclMarkedUsed |= D->Used;
575 D->setAccess((AccessSpecifier)DeclBits.getNextBits(/*Width=*/2));
576 D->setImplicit(DeclBits.getNextBit());
577 bool HasStandaloneLexicalDC = DeclBits.getNextBit();
578 bool HasAttrs = DeclBits.getNextBit();
579 D->setTopLevelDeclInObjCContainer(DeclBits.getNextBit());
580 D->InvalidDecl = DeclBits.getNextBit();
581 D->FromASTFile = true;
582
583 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
584 isa<ParmVarDecl, ObjCTypeParamDecl>(Val: D)) {
585 // We don't want to deserialize the DeclContext of a template
586 // parameter or of a parameter of a function template immediately. These
587 // entities might be used in the formulation of its DeclContext (for
588 // example, a function parameter can be used in decltype() in trailing
589 // return type of the function). Use the translation unit DeclContext as a
590 // placeholder.
591 GlobalDeclID SemaDCIDForTemplateParmDecl = readDeclID();
592 GlobalDeclID LexicalDCIDForTemplateParmDecl =
593 HasStandaloneLexicalDC ? readDeclID() : GlobalDeclID();
594 if (LexicalDCIDForTemplateParmDecl.isInvalid())
595 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
596 Reader.addPendingDeclContextInfo(D,
597 SemaDC: SemaDCIDForTemplateParmDecl,
598 LexicalDC: LexicalDCIDForTemplateParmDecl);
599 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
600 } else {
601 auto *SemaDC = readDeclAs<DeclContext>();
602 auto *LexicalDC =
603 HasStandaloneLexicalDC ? readDeclAs<DeclContext>() : nullptr;
604 if (!LexicalDC)
605 LexicalDC = SemaDC;
606 // If the context is a class, we might not have actually merged it yet, in
607 // the case where the definition comes from an update record.
608 DeclContext *MergedSemaDC;
609 if (auto *RD = dyn_cast<CXXRecordDecl>(Val: SemaDC))
610 MergedSemaDC = getOrFakePrimaryClassDefinition(Reader, RD);
611 else
612 MergedSemaDC = Reader.MergedDeclContexts.lookup(Val: SemaDC);
613 // Avoid calling setLexicalDeclContext() directly because it uses
614 // Decl::getASTContext() internally which is unsafe during derialization.
615 D->setDeclContextsImpl(SemaDC: MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
616 Ctx&: Reader.getContext());
617 }
618 D->setLocation(ThisDeclLoc);
619
620 if (HasAttrs) {
621 AttrVec Attrs;
622 Record.readAttributes(Attrs);
623 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
624 // internally which is unsafe during derialization.
625 D->setAttrsImpl(Attrs, Ctx&: Reader.getContext());
626 }
627
628 // Determine whether this declaration is part of a (sub)module. If so, it
629 // may not yet be visible.
630 bool ModulePrivate =
631 (ModuleOwnership == Decl::ModuleOwnershipKind::ModulePrivate);
632 if (unsigned SubmoduleID = readSubmoduleID()) {
633 switch (ModuleOwnership) {
634 case Decl::ModuleOwnershipKind::Visible:
635 ModuleOwnership = Decl::ModuleOwnershipKind::VisibleWhenImported;
636 break;
637 case Decl::ModuleOwnershipKind::Unowned:
638 case Decl::ModuleOwnershipKind::VisibleWhenImported:
639 case Decl::ModuleOwnershipKind::ReachableWhenImported:
640 case Decl::ModuleOwnershipKind::ModulePrivate:
641 break;
642 }
643
644 D->setModuleOwnershipKind(ModuleOwnership);
645 // Store the owning submodule ID in the declaration.
646 D->setOwningModuleID(SubmoduleID);
647
648 if (ModulePrivate) {
649 // Module-private declarations are never visible, so there is no work to
650 // do.
651 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
652 // If local visibility is being tracked, this declaration will become
653 // hidden and visible as the owning module does.
654 } else if (Module *Owner = Reader.getSubmodule(GlobalID: SubmoduleID)) {
655 // Mark the declaration as visible when its owning module becomes visible.
656 if (Owner->NameVisibility == Module::AllVisible)
657 D->setVisibleDespiteOwningModule();
658 else
659 Reader.HiddenNamesMap[Owner].push_back(Elt: D);
660 }
661 } else if (ModulePrivate) {
662 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
663 }
664}
665
666void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
667 VisitDecl(D);
668 D->setLocation(readSourceLocation());
669 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
670 std::string Arg = readString();
671 memcpy(dest: D->getTrailingObjects(), src: Arg.data(), n: Arg.size());
672 D->getTrailingObjects()[Arg.size()] = '\0';
673}
674
675void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
676 VisitDecl(D);
677 D->setLocation(readSourceLocation());
678 std::string Name = readString();
679 memcpy(dest: D->getTrailingObjects(), src: Name.data(), n: Name.size());
680 D->getTrailingObjects()[Name.size()] = '\0';
681
682 D->ValueStart = Name.size() + 1;
683 std::string Value = readString();
684 memcpy(dest: D->getTrailingObjects() + D->ValueStart, src: Value.data(), n: Value.size());
685 D->getTrailingObjects()[D->ValueStart + Value.size()] = '\0';
686}
687
688void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
689 llvm_unreachable("Translation units are not serialized");
690}
691
692void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
693 VisitDecl(D: ND);
694 ND->setDeclName(Record.readDeclarationName());
695 AnonymousDeclNumber = Record.readInt();
696}
697
698void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
699 VisitNamedDecl(ND: TD);
700 TD->setLocStart(readSourceLocation());
701 // Delay type reading until after we have fully initialized the decl.
702 if (!isa<TagDecl, TypedefDecl, TypeAliasDecl>(Val: TD))
703 DeferredTypeID = Record.getGlobalTypeID(LocalID: Record.readInt());
704}
705
706RedeclarableResult ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
707 RedeclarableResult Redecl = VisitRedeclarable(D: TD);
708 VisitTypeDecl(TD);
709 TypeSourceInfo *TInfo = readTypeSourceInfo();
710 if (Record.readInt()) { // isModed
711 QualType modedT = Record.readType();
712 TD->setModedTypeSourceInfo(unmodedTSI: TInfo, modedTy: modedT);
713 } else
714 TD->setTypeSourceInfo(TInfo);
715 // Read and discard the declaration for which this is a typedef name for
716 // linkage, if it exists. We cannot rely on our type to pull in this decl,
717 // because it might have been merged with a type from another module and
718 // thus might not refer to our version of the declaration.
719 readDecl();
720 return Redecl;
721}
722
723void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
724 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
725 mergeRedeclarable(DBase: TD, Redecl);
726}
727
728void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
729 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
730 if (auto *Template = readDeclAs<TypeAliasTemplateDecl>())
731 // Merged when we merge the template.
732 TD->setDescribedAliasTemplate(Template);
733 else
734 mergeRedeclarable(DBase: TD, Redecl);
735}
736
737RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
738 RedeclarableResult Redecl = VisitRedeclarable(D: TD);
739 VisitTypeDecl(TD);
740
741 TD->IdentifierNamespace = Record.readInt();
742
743 BitsUnpacker TagDeclBits(Record.readInt());
744 TD->setTagKind(
745 static_cast<TagTypeKind>(TagDeclBits.getNextBits(/*Width=*/3)));
746 TD->setCompleteDefinition(TagDeclBits.getNextBit());
747 TD->setEmbeddedInDeclarator(TagDeclBits.getNextBit());
748 TD->setFreeStanding(TagDeclBits.getNextBit());
749 TD->setCompleteDefinitionRequired(TagDeclBits.getNextBit());
750 TD->setBraceRange(readSourceRange());
751
752 switch (TagDeclBits.getNextBits(/*Width=*/2)) {
753 case 0:
754 break;
755 case 1: { // ExtInfo
756 auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
757 Record.readQualifierInfo(Info&: *Info);
758 TD->TypedefNameDeclOrQualifier = Info;
759 break;
760 }
761 case 2: // TypedefNameForAnonDecl
762 NamedDeclForTagDecl = readDeclID();
763 TypedefNameForLinkage = Record.readIdentifier();
764 break;
765 default:
766 llvm_unreachable("unexpected tag info kind");
767 }
768
769 if (!isa<CXXRecordDecl>(Val: TD))
770 mergeRedeclarable(DBase: TD, Redecl);
771 return Redecl;
772}
773
774void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
775 VisitTagDecl(TD: ED);
776 if (TypeSourceInfo *TI = readTypeSourceInfo())
777 ED->setIntegerTypeSourceInfo(TI);
778 else
779 ED->setIntegerType(Record.readType());
780 ED->setPromotionType(Record.readType());
781
782 BitsUnpacker EnumDeclBits(Record.readInt());
783 ED->setNumPositiveBits(EnumDeclBits.getNextBits(/*Width=*/8));
784 ED->setNumNegativeBits(EnumDeclBits.getNextBits(/*Width=*/8));
785 ED->setScoped(EnumDeclBits.getNextBit());
786 ED->setScopedUsingClassTag(EnumDeclBits.getNextBit());
787 ED->setFixed(EnumDeclBits.getNextBit());
788
789 ED->setHasODRHash(true);
790 ED->ODRHash = Record.readInt();
791
792 // If this is a definition subject to the ODR, and we already have a
793 // definition, merge this one into it.
794 if (ED->isCompleteDefinition() && Reader.getContext().getLangOpts().Modules) {
795 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
796 if (!OldDef) {
797 // This is the first time we've seen an imported definition. Look for a
798 // local definition before deciding that we are the first definition.
799 for (auto *D : merged_redecls(D: ED->getCanonicalDecl())) {
800 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
801 OldDef = D;
802 break;
803 }
804 }
805 }
806 if (OldDef) {
807 Reader.MergedDeclContexts.insert(KV: std::make_pair(x&: ED, y&: OldDef));
808 ED->demoteThisDefinitionToDeclaration();
809 Reader.mergeDefinitionVisibility(Def: OldDef, MergedDef: ED);
810 // We don't want to check the ODR hash value for declarations from global
811 // module fragment.
812 if (!shouldSkipCheckingODR(D: ED) && !shouldSkipCheckingODR(D: OldDef) &&
813 OldDef->getODRHash() != ED->getODRHash())
814 Reader.PendingEnumOdrMergeFailures[OldDef].push_back(Elt: ED);
815 } else {
816 OldDef = ED;
817 }
818 }
819
820 if (auto *InstED = readDeclAs<EnumDecl>()) {
821 auto TSK = (TemplateSpecializationKind)Record.readInt();
822 SourceLocation POI = readSourceLocation();
823 ED->setInstantiationOfMemberEnum(C&: Reader.getContext(), ED: InstED, TSK);
824 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
825 }
826}
827
828RedeclarableResult ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
829 RedeclarableResult Redecl = VisitTagDecl(TD: RD);
830
831 BitsUnpacker RecordDeclBits(Record.readInt());
832 RD->setHasFlexibleArrayMember(RecordDeclBits.getNextBit());
833 RD->setAnonymousStructOrUnion(RecordDeclBits.getNextBit());
834 RD->setHasObjectMember(RecordDeclBits.getNextBit());
835 RD->setHasVolatileMember(RecordDeclBits.getNextBit());
836 RD->setNonTrivialToPrimitiveDefaultInitialize(RecordDeclBits.getNextBit());
837 RD->setNonTrivialToPrimitiveCopy(RecordDeclBits.getNextBit());
838 RD->setNonTrivialToPrimitiveDestroy(RecordDeclBits.getNextBit());
839 RD->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(
840 RecordDeclBits.getNextBit());
841 RD->setHasNonTrivialToPrimitiveDestructCUnion(RecordDeclBits.getNextBit());
842 RD->setHasNonTrivialToPrimitiveCopyCUnion(RecordDeclBits.getNextBit());
843 RD->setHasUninitializedExplicitInitFields(RecordDeclBits.getNextBit());
844 RD->setParamDestroyedInCallee(RecordDeclBits.getNextBit());
845 RD->setArgPassingRestrictions(
846 (RecordArgPassingKind)RecordDeclBits.getNextBits(/*Width=*/2));
847 return Redecl;
848}
849
850void ASTDeclReader::VisitRecordDecl(RecordDecl *RD) {
851 VisitRecordDeclImpl(RD);
852 RD->setODRHash(Record.readInt());
853
854 // Maintain the invariant of a redeclaration chain containing only
855 // a single definition.
856 if (RD->isCompleteDefinition()) {
857 RecordDecl *Canon = static_cast<RecordDecl *>(RD->getCanonicalDecl());
858 RecordDecl *&OldDef = Reader.RecordDefinitions[Canon];
859 if (!OldDef) {
860 // This is the first time we've seen an imported definition. Look for a
861 // local definition before deciding that we are the first definition.
862 for (auto *D : merged_redecls(D: Canon)) {
863 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
864 OldDef = D;
865 break;
866 }
867 }
868 }
869 if (OldDef) {
870 Reader.MergedDeclContexts.insert(KV: std::make_pair(x&: RD, y&: OldDef));
871 RD->demoteThisDefinitionToDeclaration();
872 Reader.mergeDefinitionVisibility(Def: OldDef, MergedDef: RD);
873 if (OldDef->getODRHash() != RD->getODRHash())
874 Reader.PendingRecordOdrMergeFailures[OldDef].push_back(Elt: RD);
875 } else {
876 OldDef = RD;
877 }
878 }
879}
880
881void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
882 VisitNamedDecl(ND: VD);
883 // For function or variable declarations, defer reading the type in case the
884 // declaration has a deduced type that references an entity declared within
885 // the function definition or variable initializer.
886 if (isa<FunctionDecl, VarDecl>(Val: VD))
887 DeferredTypeID = Record.getGlobalTypeID(LocalID: Record.readInt());
888 else
889 VD->setType(Record.readType());
890}
891
892void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
893 VisitValueDecl(VD: ECD);
894 if (Record.readInt())
895 ECD->setInitExpr(Record.readExpr());
896 ECD->setInitVal(C: Reader.getContext(), V: Record.readAPSInt());
897 mergeMergeable(D: ECD);
898}
899
900void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
901 VisitValueDecl(VD: DD);
902 DD->setInnerLocStart(readSourceLocation());
903 if (Record.readInt()) { // hasExtInfo
904 auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
905 Record.readQualifierInfo(Info&: *Info);
906 Info->TrailingRequiresClause = AssociatedConstraint(
907 Record.readExpr(),
908 UnsignedOrNone::fromInternalRepresentation(Rep: Record.readUInt32()));
909 DD->DeclInfo = Info;
910 }
911 QualType TSIType = Record.readType();
912 DD->setTypeSourceInfo(
913 TSIType.isNull() ? nullptr
914 : Reader.getContext().CreateTypeSourceInfo(T: TSIType));
915}
916
917void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
918 RedeclarableResult Redecl = VisitRedeclarable(D: FD);
919
920 FunctionDecl *Existing = nullptr;
921
922 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
923 case FunctionDecl::TK_NonTemplate:
924 break;
925 case FunctionDecl::TK_DependentNonTemplate:
926 FD->setInstantiatedFromDecl(readDeclAs<FunctionDecl>());
927 break;
928 case FunctionDecl::TK_FunctionTemplate: {
929 auto *Template = readDeclAs<FunctionTemplateDecl>();
930 Template->init(NewTemplatedDecl: FD);
931 FD->setDescribedFunctionTemplate(Template);
932 break;
933 }
934 case FunctionDecl::TK_MemberSpecialization: {
935 auto *InstFD = readDeclAs<FunctionDecl>();
936 auto TSK = (TemplateSpecializationKind)Record.readInt();
937 SourceLocation POI = readSourceLocation();
938 FD->setInstantiationOfMemberFunction(C&: Reader.getContext(), FD: InstFD, TSK);
939 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
940 break;
941 }
942 case FunctionDecl::TK_FunctionTemplateSpecialization: {
943 auto *Template = readDeclAs<FunctionTemplateDecl>();
944 auto TSK = (TemplateSpecializationKind)Record.readInt();
945
946 // Template arguments.
947 SmallVector<TemplateArgument, 8> TemplArgs;
948 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
949
950 // Template args as written.
951 TemplateArgumentListInfo TemplArgsWritten;
952 bool HasTemplateArgumentsAsWritten = Record.readBool();
953 if (HasTemplateArgumentsAsWritten)
954 Record.readTemplateArgumentListInfo(Result&: TemplArgsWritten);
955
956 SourceLocation POI = readSourceLocation();
957
958 ASTContext &C = Reader.getContext();
959 TemplateArgumentList *TemplArgList =
960 TemplateArgumentList::CreateCopy(Context&: C, Args: TemplArgs);
961
962 MemberSpecializationInfo *MSInfo = nullptr;
963 if (Record.readInt()) {
964 auto *FD = readDeclAs<FunctionDecl>();
965 auto TSK = (TemplateSpecializationKind)Record.readInt();
966 SourceLocation POI = readSourceLocation();
967
968 MSInfo = new (C) MemberSpecializationInfo(FD, TSK);
969 MSInfo->setPointOfInstantiation(POI);
970 }
971
972 FunctionTemplateSpecializationInfo *FTInfo =
973 FunctionTemplateSpecializationInfo::Create(
974 C, FD, Template, TSK, TemplateArgs: TemplArgList,
975 TemplateArgsAsWritten: HasTemplateArgumentsAsWritten ? &TemplArgsWritten : nullptr, POI,
976 MSInfo);
977 FD->TemplateOrSpecialization = FTInfo;
978
979 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
980 // The template that contains the specializations set. It's not safe to
981 // use getCanonicalDecl on Template since it may still be initializing.
982 auto *CanonTemplate = readDeclAs<FunctionTemplateDecl>();
983 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
984 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
985 // FunctionTemplateSpecializationInfo's Profile().
986 // We avoid getASTContext because a decl in the parent hierarchy may
987 // be initializing.
988 llvm::FoldingSetNodeID ID;
989 FunctionTemplateSpecializationInfo::Profile(ID, TemplateArgs: TemplArgs, Context: C);
990 void *InsertPos = nullptr;
991 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
992 FunctionTemplateSpecializationInfo *ExistingInfo =
993 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
994 if (InsertPos)
995 CommonPtr->Specializations.InsertNode(N: FTInfo, InsertPos);
996 else {
997 assert(Reader.getContext().getLangOpts().Modules &&
998 "already deserialized this template specialization");
999 Existing = ExistingInfo->getFunction();
1000 }
1001 }
1002 break;
1003 }
1004 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
1005 // Templates.
1006 UnresolvedSet<8> Candidates;
1007 unsigned NumCandidates = Record.readInt();
1008 while (NumCandidates--)
1009 Candidates.addDecl(D: readDeclAs<NamedDecl>());
1010
1011 // Templates args.
1012 TemplateArgumentListInfo TemplArgsWritten;
1013 bool HasTemplateArgumentsAsWritten = Record.readBool();
1014 if (HasTemplateArgumentsAsWritten)
1015 Record.readTemplateArgumentListInfo(Result&: TemplArgsWritten);
1016
1017 FD->setDependentTemplateSpecialization(
1018 Context&: Reader.getContext(), Templates: Candidates,
1019 TemplateArgs: HasTemplateArgumentsAsWritten ? &TemplArgsWritten : nullptr);
1020 // These are not merged; we don't need to merge redeclarations of dependent
1021 // template friends.
1022 break;
1023 }
1024 }
1025
1026 VisitDeclaratorDecl(DD: FD);
1027
1028 // Attach a type to this function. Use the real type if possible, but fall
1029 // back to the type as written if it involves a deduced return type.
1030 if (FD->getTypeSourceInfo() && FD->getTypeSourceInfo()
1031 ->getType()
1032 ->castAs<FunctionType>()
1033 ->getReturnType()
1034 ->getContainedAutoType()) {
1035 // We'll set up the real type in Visit, once we've finished loading the
1036 // function.
1037 FD->setType(FD->getTypeSourceInfo()->getType());
1038 Reader.PendingDeducedFunctionTypes.push_back(Elt: {FD, DeferredTypeID});
1039 } else {
1040 FD->setType(Reader.GetType(ID: DeferredTypeID));
1041 }
1042 DeferredTypeID = 0;
1043
1044 FD->DNLoc = Record.readDeclarationNameLoc(Name: FD->getDeclName());
1045 FD->IdentifierNamespace = Record.readInt();
1046
1047 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
1048 // after everything else is read.
1049 BitsUnpacker FunctionDeclBits(Record.readInt());
1050
1051 FD->setCachedLinkage((Linkage)FunctionDeclBits.getNextBits(/*Width=*/3));
1052 FD->setStorageClass((StorageClass)FunctionDeclBits.getNextBits(/*Width=*/3));
1053 FD->setInlineSpecified(FunctionDeclBits.getNextBit());
1054 FD->setImplicitlyInline(FunctionDeclBits.getNextBit());
1055 FD->setHasSkippedBody(FunctionDeclBits.getNextBit());
1056 FD->setVirtualAsWritten(FunctionDeclBits.getNextBit());
1057 // We defer calling `FunctionDecl::setPure()` here as for methods of
1058 // `CXXTemplateSpecializationDecl`s, we may not have connected up the
1059 // definition (which is required for `setPure`).
1060 const bool Pure = FunctionDeclBits.getNextBit();
1061 FD->setHasInheritedPrototype(FunctionDeclBits.getNextBit());
1062 FD->setHasWrittenPrototype(FunctionDeclBits.getNextBit());
1063 FD->setDeletedAsWritten(D: FunctionDeclBits.getNextBit());
1064 FD->setTrivial(FunctionDeclBits.getNextBit());
1065 FD->setTrivialForCall(FunctionDeclBits.getNextBit());
1066 FD->setDefaulted(FunctionDeclBits.getNextBit());
1067 FD->setExplicitlyDefaulted(FunctionDeclBits.getNextBit());
1068 FD->setIneligibleOrNotSelected(FunctionDeclBits.getNextBit());
1069 FD->setConstexprKind(
1070 (ConstexprSpecKind)FunctionDeclBits.getNextBits(/*Width=*/2));
1071 FD->setHasImplicitReturnZero(FunctionDeclBits.getNextBit());
1072 FD->setIsMultiVersion(FunctionDeclBits.getNextBit());
1073 FD->setLateTemplateParsed(FunctionDeclBits.getNextBit());
1074 FD->setInstantiatedFromMemberTemplate(FunctionDeclBits.getNextBit());
1075 FD->setFriendConstraintRefersToEnclosingTemplate(
1076 FunctionDeclBits.getNextBit());
1077 FD->setUsesSEHTry(FunctionDeclBits.getNextBit());
1078 FD->setIsDestroyingOperatorDelete(FunctionDeclBits.getNextBit());
1079 FD->setIsTypeAwareOperatorNewOrDelete(FunctionDeclBits.getNextBit());
1080
1081 FD->EndRangeLoc = readSourceLocation();
1082 if (FD->isExplicitlyDefaulted())
1083 FD->setDefaultLoc(readSourceLocation());
1084
1085 FD->ODRHash = Record.readInt();
1086 FD->setHasODRHash(true);
1087
1088 if (FD->isDefaulted() || FD->isDeletedAsWritten()) {
1089 // If 'Info' is nonzero, we need to read an DefaultedOrDeletedInfo; if,
1090 // additionally, the second bit is also set, we also need to read
1091 // a DeletedMessage for the DefaultedOrDeletedInfo.
1092 if (auto Info = Record.readInt()) {
1093 bool HasMessage = Info & 2;
1094 StringLiteral *DeletedMessage =
1095 HasMessage ? cast<StringLiteral>(Val: Record.readExpr()) : nullptr;
1096
1097 unsigned NumLookups = Record.readInt();
1098 SmallVector<DeclAccessPair, 8> Lookups;
1099 for (unsigned I = 0; I != NumLookups; ++I) {
1100 NamedDecl *ND = Record.readDeclAs<NamedDecl>();
1101 AccessSpecifier AS = (AccessSpecifier)Record.readInt();
1102 Lookups.push_back(Elt: DeclAccessPair::make(D: ND, AS));
1103 }
1104
1105 FD->setDefaultedOrDeletedInfo(
1106 FunctionDecl::DefaultedOrDeletedFunctionInfo::Create(
1107 Context&: Reader.getContext(), Lookups, DeletedMessage));
1108 }
1109 }
1110
1111 if (Existing)
1112 MergeImpl.mergeRedeclarable(D: FD, Existing, Redecl);
1113 else if (auto Kind = FD->getTemplatedKind();
1114 Kind == FunctionDecl::TK_FunctionTemplate ||
1115 Kind == FunctionDecl::TK_FunctionTemplateSpecialization) {
1116 // Function Templates have their FunctionTemplateDecls merged instead of
1117 // their FunctionDecls.
1118 auto merge = [this, &Redecl, FD](auto &&F) {
1119 auto *Existing = cast_or_null<FunctionDecl>(Val: Redecl.getKnownMergeTarget());
1120 RedeclarableResult NewRedecl(Existing ? F(Existing) : nullptr,
1121 Redecl.getFirstID(), Redecl.isKeyDecl());
1122 mergeRedeclarableTemplate(D: F(FD), Redecl&: NewRedecl);
1123 };
1124 if (Kind == FunctionDecl::TK_FunctionTemplate)
1125 merge(
1126 [](FunctionDecl *FD) { return FD->getDescribedFunctionTemplate(); });
1127 else
1128 merge([](FunctionDecl *FD) {
1129 return FD->getTemplateSpecializationInfo()->getTemplate();
1130 });
1131 } else
1132 mergeRedeclarable(DBase: FD, Redecl);
1133
1134 // Defer calling `setPure` until merging above has guaranteed we've set
1135 // `DefinitionData` (as this will need to access it).
1136 FD->setIsPureVirtual(Pure);
1137
1138 // Read in the parameters.
1139 unsigned NumParams = Record.readInt();
1140 SmallVector<ParmVarDecl *, 16> Params;
1141 Params.reserve(N: NumParams);
1142 for (unsigned I = 0; I != NumParams; ++I)
1143 Params.push_back(Elt: readDeclAs<ParmVarDecl>());
1144 FD->setParams(C&: Reader.getContext(), NewParamInfo: Params);
1145
1146 // If the declaration is a SYCL kernel entry point function as indicated by
1147 // the presence of a sycl_kernel_entry_point attribute, register it so that
1148 // associated metadata is recreated.
1149 if (FD->hasAttr<SYCLKernelEntryPointAttr>()) {
1150 auto *SKEPAttr = FD->getAttr<SYCLKernelEntryPointAttr>();
1151 ASTContext &C = Reader.getContext();
1152 const SYCLKernelInfo *SKI = C.findSYCLKernelInfo(T: SKEPAttr->getKernelName());
1153 if (SKI) {
1154 if (!declaresSameEntity(D1: FD, D2: SKI->getKernelEntryPointDecl())) {
1155 Reader.Diag(Loc: FD->getLocation(), DiagID: diag::err_sycl_kernel_name_conflict)
1156 << SKEPAttr;
1157 Reader.Diag(Loc: SKI->getKernelEntryPointDecl()->getLocation(),
1158 DiagID: diag::note_previous_declaration);
1159 SKEPAttr->setInvalidAttr();
1160 }
1161 } else {
1162 C.registerSYCLEntryPointFunction(FD);
1163 }
1164 }
1165}
1166
1167void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
1168 VisitNamedDecl(ND: MD);
1169 if (Record.readInt()) {
1170 // Load the body on-demand. Most clients won't care, because method
1171 // definitions rarely show up in headers.
1172 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1173 }
1174 MD->setSelfDecl(readDeclAs<ImplicitParamDecl>());
1175 MD->setCmdDecl(readDeclAs<ImplicitParamDecl>());
1176 MD->setInstanceMethod(Record.readInt());
1177 MD->setVariadic(Record.readInt());
1178 MD->setPropertyAccessor(Record.readInt());
1179 MD->setSynthesizedAccessorStub(Record.readInt());
1180 MD->setDefined(Record.readInt());
1181 MD->setOverriding(Record.readInt());
1182 MD->setHasSkippedBody(Record.readInt());
1183
1184 MD->setIsRedeclaration(Record.readInt());
1185 MD->setHasRedeclaration(Record.readInt());
1186 if (MD->hasRedeclaration())
1187 Reader.getContext().setObjCMethodRedeclaration(MD,
1188 Redecl: readDeclAs<ObjCMethodDecl>());
1189
1190 MD->setDeclImplementation(
1191 static_cast<ObjCImplementationControl>(Record.readInt()));
1192 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1193 MD->setRelatedResultType(Record.readInt());
1194 MD->setReturnType(Record.readType());
1195 MD->setReturnTypeSourceInfo(readTypeSourceInfo());
1196 MD->DeclEndLoc = readSourceLocation();
1197 unsigned NumParams = Record.readInt();
1198 SmallVector<ParmVarDecl *, 16> Params;
1199 Params.reserve(N: NumParams);
1200 for (unsigned I = 0; I != NumParams; ++I)
1201 Params.push_back(Elt: readDeclAs<ParmVarDecl>());
1202
1203 MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1204 unsigned NumStoredSelLocs = Record.readInt();
1205 SmallVector<SourceLocation, 16> SelLocs;
1206 SelLocs.reserve(N: NumStoredSelLocs);
1207 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1208 SelLocs.push_back(Elt: readSourceLocation());
1209
1210 MD->setParamsAndSelLocs(C&: Reader.getContext(), Params, SelLocs);
1211}
1212
1213void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1214 VisitTypedefNameDecl(TD: D);
1215
1216 D->Variance = Record.readInt();
1217 D->Index = Record.readInt();
1218 D->VarianceLoc = readSourceLocation();
1219 D->ColonLoc = readSourceLocation();
1220}
1221
1222void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
1223 VisitNamedDecl(ND: CD);
1224 CD->setAtStartLoc(readSourceLocation());
1225 CD->setAtEndRange(readSourceRange());
1226}
1227
1228ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
1229 unsigned numParams = Record.readInt();
1230 if (numParams == 0)
1231 return nullptr;
1232
1233 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
1234 typeParams.reserve(N: numParams);
1235 for (unsigned i = 0; i != numParams; ++i) {
1236 auto *typeParam = readDeclAs<ObjCTypeParamDecl>();
1237 if (!typeParam)
1238 return nullptr;
1239
1240 typeParams.push_back(Elt: typeParam);
1241 }
1242
1243 SourceLocation lAngleLoc = readSourceLocation();
1244 SourceLocation rAngleLoc = readSourceLocation();
1245
1246 return ObjCTypeParamList::create(ctx&: Reader.getContext(), lAngleLoc,
1247 typeParams, rAngleLoc);
1248}
1249
1250void ASTDeclReader::ReadObjCDefinitionData(
1251 struct ObjCInterfaceDecl::DefinitionData &Data) {
1252 // Read the superclass.
1253 Data.SuperClassTInfo = readTypeSourceInfo();
1254
1255 Data.EndLoc = readSourceLocation();
1256 Data.HasDesignatedInitializers = Record.readInt();
1257 Data.ODRHash = Record.readInt();
1258 Data.HasODRHash = true;
1259
1260 // Read the directly referenced protocols and their SourceLocations.
1261 unsigned NumProtocols = Record.readInt();
1262 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1263 Protocols.reserve(N: NumProtocols);
1264 for (unsigned I = 0; I != NumProtocols; ++I)
1265 Protocols.push_back(Elt: readDeclAs<ObjCProtocolDecl>());
1266 SmallVector<SourceLocation, 16> ProtoLocs;
1267 ProtoLocs.reserve(N: NumProtocols);
1268 for (unsigned I = 0; I != NumProtocols; ++I)
1269 ProtoLocs.push_back(Elt: readSourceLocation());
1270 Data.ReferencedProtocols.set(InList: Protocols.data(), Elts: NumProtocols, Locs: ProtoLocs.data(),
1271 Ctx&: Reader.getContext());
1272
1273 // Read the transitive closure of protocols referenced by this class.
1274 NumProtocols = Record.readInt();
1275 Protocols.clear();
1276 Protocols.reserve(N: NumProtocols);
1277 for (unsigned I = 0; I != NumProtocols; ++I)
1278 Protocols.push_back(Elt: readDeclAs<ObjCProtocolDecl>());
1279 Data.AllReferencedProtocols.set(InList: Protocols.data(), Elts: NumProtocols,
1280 Ctx&: Reader.getContext());
1281}
1282
1283void ASTDeclMerger::MergeDefinitionData(
1284 ObjCInterfaceDecl *D, struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1285 struct ObjCInterfaceDecl::DefinitionData &DD = D->data();
1286 if (DD.Definition == NewDD.Definition)
1287 return;
1288
1289 Reader.MergedDeclContexts.insert(
1290 KV: std::make_pair(x&: NewDD.Definition, y&: DD.Definition));
1291 Reader.mergeDefinitionVisibility(Def: DD.Definition, MergedDef: NewDD.Definition);
1292
1293 if (D->getODRHash() != NewDD.ODRHash)
1294 Reader.PendingObjCInterfaceOdrMergeFailures[DD.Definition].push_back(
1295 Elt: {NewDD.Definition, &NewDD});
1296}
1297
1298void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1299 RedeclarableResult Redecl = VisitRedeclarable(D: ID);
1300 VisitObjCContainerDecl(CD: ID);
1301 DeferredTypeID = Record.getGlobalTypeID(LocalID: Record.readInt());
1302 mergeRedeclarable(DBase: ID, Redecl);
1303
1304 ID->TypeParamList = ReadObjCTypeParamList();
1305 if (Record.readInt()) {
1306 // Read the definition.
1307 ID->allocateDefinitionData();
1308
1309 ReadObjCDefinitionData(Data&: ID->data());
1310 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1311 if (Canon->Data.getPointer()) {
1312 // If we already have a definition, keep the definition invariant and
1313 // merge the data.
1314 MergeImpl.MergeDefinitionData(D: Canon, NewDD: std::move(ID->data()));
1315 ID->Data = Canon->Data;
1316 } else {
1317 // Set the definition data of the canonical declaration, so other
1318 // redeclarations will see it.
1319 ID->getCanonicalDecl()->Data = ID->Data;
1320
1321 // We will rebuild this list lazily.
1322 ID->setIvarList(nullptr);
1323 }
1324
1325 // Note that we have deserialized a definition.
1326 Reader.PendingDefinitions.insert(Ptr: ID);
1327
1328 // Note that we've loaded this Objective-C class.
1329 Reader.ObjCClassesLoaded.push_back(Elt: ID);
1330 } else {
1331 ID->Data = ID->getCanonicalDecl()->Data;
1332 }
1333}
1334
1335void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1336 VisitFieldDecl(FD: IVD);
1337 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1338 // This field will be built lazily.
1339 IVD->setNextIvar(nullptr);
1340 bool synth = Record.readInt();
1341 IVD->setSynthesize(synth);
1342
1343 // Check ivar redeclaration.
1344 if (IVD->isInvalidDecl())
1345 return;
1346 // Don't check ObjCInterfaceDecl as interfaces are named and mismatches can be
1347 // detected in VisitObjCInterfaceDecl. Here we are looking for redeclarations
1348 // in extensions.
1349 if (isa<ObjCInterfaceDecl>(Val: IVD->getDeclContext()))
1350 return;
1351 ObjCInterfaceDecl *CanonIntf =
1352 IVD->getContainingInterface()->getCanonicalDecl();
1353 IdentifierInfo *II = IVD->getIdentifier();
1354 ObjCIvarDecl *PrevIvar = CanonIntf->lookupInstanceVariable(IVarName: II);
1355 if (PrevIvar && PrevIvar != IVD) {
1356 auto *ParentExt = dyn_cast<ObjCCategoryDecl>(Val: IVD->getDeclContext());
1357 auto *PrevParentExt =
1358 dyn_cast<ObjCCategoryDecl>(Val: PrevIvar->getDeclContext());
1359 if (ParentExt && PrevParentExt) {
1360 // Postpone diagnostic as we should merge identical extensions from
1361 // different modules.
1362 Reader
1363 .PendingObjCExtensionIvarRedeclarations[std::make_pair(x&: ParentExt,
1364 y&: PrevParentExt)]
1365 .push_back(Elt: std::make_pair(x&: IVD, y&: PrevIvar));
1366 } else if (ParentExt || PrevParentExt) {
1367 // Duplicate ivars in extension + implementation are never compatible.
1368 // Compatibility of implementation + implementation should be handled in
1369 // VisitObjCImplementationDecl.
1370 Reader.Diag(Loc: IVD->getLocation(), DiagID: diag::err_duplicate_ivar_declaration)
1371 << II;
1372 Reader.Diag(Loc: PrevIvar->getLocation(), DiagID: diag::note_previous_definition);
1373 }
1374 }
1375}
1376
1377void ASTDeclReader::ReadObjCDefinitionData(
1378 struct ObjCProtocolDecl::DefinitionData &Data) {
1379 unsigned NumProtoRefs = Record.readInt();
1380 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1381 ProtoRefs.reserve(N: NumProtoRefs);
1382 for (unsigned I = 0; I != NumProtoRefs; ++I)
1383 ProtoRefs.push_back(Elt: readDeclAs<ObjCProtocolDecl>());
1384 SmallVector<SourceLocation, 16> ProtoLocs;
1385 ProtoLocs.reserve(N: NumProtoRefs);
1386 for (unsigned I = 0; I != NumProtoRefs; ++I)
1387 ProtoLocs.push_back(Elt: readSourceLocation());
1388 Data.ReferencedProtocols.set(InList: ProtoRefs.data(), Elts: NumProtoRefs,
1389 Locs: ProtoLocs.data(), Ctx&: Reader.getContext());
1390 Data.ODRHash = Record.readInt();
1391 Data.HasODRHash = true;
1392}
1393
1394void ASTDeclMerger::MergeDefinitionData(
1395 ObjCProtocolDecl *D, struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1396 struct ObjCProtocolDecl::DefinitionData &DD = D->data();
1397 if (DD.Definition == NewDD.Definition)
1398 return;
1399
1400 Reader.MergedDeclContexts.insert(
1401 KV: std::make_pair(x&: NewDD.Definition, y&: DD.Definition));
1402 Reader.mergeDefinitionVisibility(Def: DD.Definition, MergedDef: NewDD.Definition);
1403
1404 if (D->getODRHash() != NewDD.ODRHash)
1405 Reader.PendingObjCProtocolOdrMergeFailures[DD.Definition].push_back(
1406 Elt: {NewDD.Definition, &NewDD});
1407}
1408
1409void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1410 RedeclarableResult Redecl = VisitRedeclarable(D: PD);
1411 VisitObjCContainerDecl(CD: PD);
1412 mergeRedeclarable(DBase: PD, Redecl);
1413
1414 if (Record.readInt()) {
1415 // Read the definition.
1416 PD->allocateDefinitionData();
1417
1418 ReadObjCDefinitionData(Data&: PD->data());
1419
1420 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1421 if (Canon->Data.getPointer()) {
1422 // If we already have a definition, keep the definition invariant and
1423 // merge the data.
1424 MergeImpl.MergeDefinitionData(D: Canon, NewDD: std::move(PD->data()));
1425 PD->Data = Canon->Data;
1426 } else {
1427 // Set the definition data of the canonical declaration, so other
1428 // redeclarations will see it.
1429 PD->getCanonicalDecl()->Data = PD->Data;
1430 }
1431 // Note that we have deserialized a definition.
1432 Reader.PendingDefinitions.insert(Ptr: PD);
1433 } else {
1434 PD->Data = PD->getCanonicalDecl()->Data;
1435 }
1436}
1437
1438void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1439 VisitFieldDecl(FD);
1440}
1441
1442void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1443 VisitObjCContainerDecl(CD);
1444 CD->setCategoryNameLoc(readSourceLocation());
1445 CD->setIvarLBraceLoc(readSourceLocation());
1446 CD->setIvarRBraceLoc(readSourceLocation());
1447
1448 // Note that this category has been deserialized. We do this before
1449 // deserializing the interface declaration, so that it will consider this
1450 /// category.
1451 Reader.CategoriesDeserialized.insert(Ptr: CD);
1452
1453 CD->ClassInterface = readDeclAs<ObjCInterfaceDecl>();
1454 CD->TypeParamList = ReadObjCTypeParamList();
1455 unsigned NumProtoRefs = Record.readInt();
1456 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1457 ProtoRefs.reserve(N: NumProtoRefs);
1458 for (unsigned I = 0; I != NumProtoRefs; ++I)
1459 ProtoRefs.push_back(Elt: readDeclAs<ObjCProtocolDecl>());
1460 SmallVector<SourceLocation, 16> ProtoLocs;
1461 ProtoLocs.reserve(N: NumProtoRefs);
1462 for (unsigned I = 0; I != NumProtoRefs; ++I)
1463 ProtoLocs.push_back(Elt: readSourceLocation());
1464 CD->setProtocolList(List: ProtoRefs.data(), Num: NumProtoRefs, Locs: ProtoLocs.data(),
1465 C&: Reader.getContext());
1466
1467 // Protocols in the class extension belong to the class.
1468 if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1469 CD->ClassInterface->mergeClassExtensionProtocolList(
1470 List: (ObjCProtocolDecl *const *)ProtoRefs.data(), Num: NumProtoRefs,
1471 C&: Reader.getContext());
1472}
1473
1474void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1475 VisitNamedDecl(ND: CAD);
1476 CAD->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1477}
1478
1479void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1480 VisitNamedDecl(ND: D);
1481 D->setAtLoc(readSourceLocation());
1482 D->setLParenLoc(readSourceLocation());
1483 QualType T = Record.readType();
1484 TypeSourceInfo *TSI = readTypeSourceInfo();
1485 D->setType(T, TSI);
1486 D->setPropertyAttributes((ObjCPropertyAttribute::Kind)Record.readInt());
1487 D->setPropertyAttributesAsWritten(
1488 (ObjCPropertyAttribute::Kind)Record.readInt());
1489 D->setPropertyImplementation(
1490 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1491 DeclarationName GetterName = Record.readDeclarationName();
1492 SourceLocation GetterLoc = readSourceLocation();
1493 D->setGetterName(Sel: GetterName.getObjCSelector(), Loc: GetterLoc);
1494 DeclarationName SetterName = Record.readDeclarationName();
1495 SourceLocation SetterLoc = readSourceLocation();
1496 D->setSetterName(Sel: SetterName.getObjCSelector(), Loc: SetterLoc);
1497 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1498 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1499 D->setPropertyIvarDecl(readDeclAs<ObjCIvarDecl>());
1500}
1501
1502void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1503 VisitObjCContainerDecl(CD: D);
1504 D->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1505}
1506
1507void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1508 VisitObjCImplDecl(D);
1509 D->CategoryNameLoc = readSourceLocation();
1510}
1511
1512void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1513 VisitObjCImplDecl(D);
1514 D->setSuperClass(readDeclAs<ObjCInterfaceDecl>());
1515 D->SuperLoc = readSourceLocation();
1516 D->setIvarLBraceLoc(readSourceLocation());
1517 D->setIvarRBraceLoc(readSourceLocation());
1518 D->setHasNonZeroConstructors(Record.readInt());
1519 D->setHasDestructors(Record.readInt());
1520 D->NumIvarInitializers = Record.readInt();
1521 if (D->NumIvarInitializers)
1522 D->IvarInitializers = ReadGlobalOffset();
1523}
1524
1525void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1526 VisitDecl(D);
1527 D->setAtLoc(readSourceLocation());
1528 D->setPropertyDecl(readDeclAs<ObjCPropertyDecl>());
1529 D->PropertyIvarDecl = readDeclAs<ObjCIvarDecl>();
1530 D->IvarLoc = readSourceLocation();
1531 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1532 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1533 D->setGetterCXXConstructor(Record.readExpr());
1534 D->setSetterCXXAssignment(Record.readExpr());
1535}
1536
1537void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1538 VisitDeclaratorDecl(DD: FD);
1539 FD->Mutable = Record.readInt();
1540
1541 unsigned Bits = Record.readInt();
1542 FD->StorageKind = Bits >> 1;
1543 if (FD->StorageKind == FieldDecl::ISK_CapturedVLAType)
1544 FD->CapturedVLAType =
1545 cast<VariableArrayType>(Val: Record.readType().getTypePtr());
1546 else if (Bits & 1)
1547 FD->setBitWidth(Record.readExpr());
1548
1549 if (!FD->getDeclName() ||
1550 FD->isPlaceholderVar(LangOpts: Reader.getContext().getLangOpts())) {
1551 if (auto *Tmpl = readDeclAs<FieldDecl>())
1552 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(Inst: FD, Tmpl);
1553 }
1554 mergeMergeable(D: FD);
1555}
1556
1557void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1558 VisitDeclaratorDecl(DD: PD);
1559 PD->GetterId = Record.readIdentifier();
1560 PD->SetterId = Record.readIdentifier();
1561}
1562
1563void ASTDeclReader::VisitMSGuidDecl(MSGuidDecl *D) {
1564 VisitValueDecl(VD: D);
1565 D->PartVal.Part1 = Record.readInt();
1566 D->PartVal.Part2 = Record.readInt();
1567 D->PartVal.Part3 = Record.readInt();
1568 for (auto &C : D->PartVal.Part4And5)
1569 C = Record.readInt();
1570
1571 // Add this GUID to the AST context's lookup structure, and merge if needed.
1572 if (MSGuidDecl *Existing = Reader.getContext().MSGuidDecls.GetOrInsertNode(N: D))
1573 Reader.getContext().setPrimaryMergedDecl(D, Primary: Existing->getCanonicalDecl());
1574}
1575
1576void ASTDeclReader::VisitUnnamedGlobalConstantDecl(
1577 UnnamedGlobalConstantDecl *D) {
1578 VisitValueDecl(VD: D);
1579 D->Value = Record.readAPValue();
1580
1581 // Add this to the AST context's lookup structure, and merge if needed.
1582 if (UnnamedGlobalConstantDecl *Existing =
1583 Reader.getContext().UnnamedGlobalConstantDecls.GetOrInsertNode(N: D))
1584 Reader.getContext().setPrimaryMergedDecl(D, Primary: Existing->getCanonicalDecl());
1585}
1586
1587void ASTDeclReader::VisitTemplateParamObjectDecl(TemplateParamObjectDecl *D) {
1588 VisitValueDecl(VD: D);
1589 D->Value = Record.readAPValue();
1590
1591 // Add this template parameter object to the AST context's lookup structure,
1592 // and merge if needed.
1593 if (TemplateParamObjectDecl *Existing =
1594 Reader.getContext().TemplateParamObjectDecls.GetOrInsertNode(N: D))
1595 Reader.getContext().setPrimaryMergedDecl(D, Primary: Existing->getCanonicalDecl());
1596}
1597
1598void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1599 VisitValueDecl(VD: FD);
1600
1601 FD->ChainingSize = Record.readInt();
1602 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1603 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1604
1605 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1606 FD->Chaining[I] = readDeclAs<NamedDecl>();
1607
1608 mergeMergeable(D: FD);
1609}
1610
1611RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1612 RedeclarableResult Redecl = VisitRedeclarable(D: VD);
1613 VisitDeclaratorDecl(DD: VD);
1614
1615 BitsUnpacker VarDeclBits(Record.readInt());
1616 auto VarLinkage = Linkage(VarDeclBits.getNextBits(/*Width=*/3));
1617 bool DefGeneratedInModule = VarDeclBits.getNextBit();
1618 VD->VarDeclBits.SClass = (StorageClass)VarDeclBits.getNextBits(/*Width=*/3);
1619 VD->VarDeclBits.TSCSpec = VarDeclBits.getNextBits(/*Width=*/2);
1620 VD->VarDeclBits.InitStyle = VarDeclBits.getNextBits(/*Width=*/2);
1621 VD->VarDeclBits.ARCPseudoStrong = VarDeclBits.getNextBit();
1622 bool HasDeducedType = false;
1623 if (!isa<ParmVarDecl>(Val: VD)) {
1624 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1625 VarDeclBits.getNextBit();
1626 VD->NonParmVarDeclBits.ExceptionVar = VarDeclBits.getNextBit();
1627 VD->NonParmVarDeclBits.NRVOVariable = VarDeclBits.getNextBit();
1628 VD->NonParmVarDeclBits.CXXForRangeDecl = VarDeclBits.getNextBit();
1629
1630 VD->NonParmVarDeclBits.IsInline = VarDeclBits.getNextBit();
1631 VD->NonParmVarDeclBits.IsInlineSpecified = VarDeclBits.getNextBit();
1632 VD->NonParmVarDeclBits.IsConstexpr = VarDeclBits.getNextBit();
1633 VD->NonParmVarDeclBits.IsInitCapture = VarDeclBits.getNextBit();
1634 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope =
1635 VarDeclBits.getNextBit();
1636
1637 VD->NonParmVarDeclBits.EscapingByref = VarDeclBits.getNextBit();
1638 HasDeducedType = VarDeclBits.getNextBit();
1639 VD->NonParmVarDeclBits.ImplicitParamKind =
1640 VarDeclBits.getNextBits(/*Width*/ 3);
1641
1642 VD->NonParmVarDeclBits.ObjCForDecl = VarDeclBits.getNextBit();
1643 VD->NonParmVarDeclBits.IsCXXForRangeImplicitVar = VarDeclBits.getNextBit();
1644 }
1645
1646 // If this variable has a deduced type, defer reading that type until we are
1647 // done deserializing this variable, because the type might refer back to the
1648 // variable.
1649 if (HasDeducedType)
1650 Reader.PendingDeducedVarTypes.push_back(Elt: {VD, DeferredTypeID});
1651 else
1652 VD->setType(Reader.GetType(ID: DeferredTypeID));
1653 DeferredTypeID = 0;
1654
1655 VD->setCachedLinkage(VarLinkage);
1656
1657 // Reconstruct the one piece of the IdentifierNamespace that we need.
1658 if (VD->getStorageClass() == SC_Extern && VarLinkage != Linkage::None &&
1659 VD->getLexicalDeclContext()->isFunctionOrMethod())
1660 VD->setLocalExternDecl();
1661
1662 if (DefGeneratedInModule) {
1663 Reader.DefinitionSource[VD] =
1664 Loc.F->Kind == ModuleKind::MK_MainFile ||
1665 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
1666 }
1667
1668 if (VD->hasAttr<BlocksAttr>()) {
1669 Expr *CopyExpr = Record.readExpr();
1670 if (CopyExpr)
1671 Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, CanThrow: Record.readInt());
1672 }
1673
1674 enum VarKind {
1675 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1676 };
1677 switch ((VarKind)Record.readInt()) {
1678 case VarNotTemplate:
1679 // Only true variables (not parameters or implicit parameters) can be
1680 // merged; the other kinds are not really redeclarable at all.
1681 if (!isa<ParmVarDecl>(Val: VD) && !isa<ImplicitParamDecl>(Val: VD) &&
1682 !isa<VarTemplateSpecializationDecl>(Val: VD))
1683 mergeRedeclarable(DBase: VD, Redecl);
1684 break;
1685 case VarTemplate:
1686 // Merged when we merge the template.
1687 VD->setDescribedVarTemplate(readDeclAs<VarTemplateDecl>());
1688 break;
1689 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1690 auto *Tmpl = readDeclAs<VarDecl>();
1691 auto TSK = (TemplateSpecializationKind)Record.readInt();
1692 SourceLocation POI = readSourceLocation();
1693 Reader.getContext().setInstantiatedFromStaticDataMember(Inst: VD, Tmpl, TSK,PointOfInstantiation: POI);
1694 mergeRedeclarable(DBase: VD, Redecl);
1695 break;
1696 }
1697 }
1698
1699 return Redecl;
1700}
1701
1702void ASTDeclReader::ReadVarDeclInit(VarDecl *VD) {
1703 if (uint64_t Val = Record.readInt()) {
1704 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1705 Eval->HasConstantInitialization = (Val & 2) != 0;
1706 Eval->HasConstantDestruction = (Val & 4) != 0;
1707 Eval->WasEvaluated = (Val & 8) != 0;
1708 Eval->HasSideEffects = (Val & 16) != 0;
1709 Eval->CheckedForSideEffects = true;
1710 if (Eval->WasEvaluated) {
1711 Eval->Evaluated = Record.readAPValue();
1712 if (Eval->Evaluated.needsCleanup())
1713 Reader.getContext().addDestruction(Ptr: &Eval->Evaluated);
1714 }
1715
1716 // Store the offset of the initializer. Don't deserialize it yet: it might
1717 // not be needed, and might refer back to the variable, for example if it
1718 // contains a lambda.
1719 Eval->Value = GetCurrentCursorOffset();
1720 }
1721}
1722
1723void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1724 VisitVarDecl(VD: PD);
1725}
1726
1727void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1728 VisitVarDecl(VD: PD);
1729
1730 unsigned scopeIndex = Record.readInt();
1731 BitsUnpacker ParmVarDeclBits(Record.readInt());
1732 unsigned isObjCMethodParam = ParmVarDeclBits.getNextBit();
1733 unsigned scopeDepth = ParmVarDeclBits.getNextBits(/*Width=*/7);
1734 unsigned declQualifier = ParmVarDeclBits.getNextBits(/*Width=*/7);
1735 if (isObjCMethodParam) {
1736 assert(scopeDepth == 0);
1737 PD->setObjCMethodScopeInfo(scopeIndex);
1738 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1739 } else {
1740 PD->setScopeInfo(scopeDepth, parameterIndex: scopeIndex);
1741 }
1742 PD->ParmVarDeclBits.IsKNRPromoted = ParmVarDeclBits.getNextBit();
1743
1744 PD->ParmVarDeclBits.HasInheritedDefaultArg = ParmVarDeclBits.getNextBit();
1745 if (ParmVarDeclBits.getNextBit()) // hasUninstantiatedDefaultArg.
1746 PD->setUninstantiatedDefaultArg(Record.readExpr());
1747
1748 if (ParmVarDeclBits.getNextBit()) // Valid explicit object parameter
1749 PD->ExplicitObjectParameterIntroducerLoc = Record.readSourceLocation();
1750
1751 // FIXME: If this is a redeclaration of a function from another module, handle
1752 // inheritance of default arguments.
1753}
1754
1755void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1756 VisitVarDecl(VD: DD);
1757 auto **BDs = DD->getTrailingObjects();
1758 for (unsigned I = 0; I != DD->NumBindings; ++I) {
1759 BDs[I] = readDeclAs<BindingDecl>();
1760 BDs[I]->setDecomposedDecl(DD);
1761 }
1762}
1763
1764void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1765 VisitValueDecl(VD: BD);
1766 BD->Binding = Record.readExpr();
1767}
1768
1769void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1770 VisitDecl(D: AD);
1771 AD->setAsmString(cast<StringLiteral>(Val: Record.readExpr()));
1772 AD->setRParenLoc(readSourceLocation());
1773}
1774
1775void ASTDeclReader::VisitTopLevelStmtDecl(TopLevelStmtDecl *D) {
1776 VisitDecl(D);
1777 D->Statement = Record.readStmt();
1778}
1779
1780void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1781 VisitDecl(D: BD);
1782 BD->setBody(cast_or_null<CompoundStmt>(Val: Record.readStmt()));
1783 BD->setSignatureAsWritten(readTypeSourceInfo());
1784 unsigned NumParams = Record.readInt();
1785 SmallVector<ParmVarDecl *, 16> Params;
1786 Params.reserve(N: NumParams);
1787 for (unsigned I = 0; I != NumParams; ++I)
1788 Params.push_back(Elt: readDeclAs<ParmVarDecl>());
1789 BD->setParams(Params);
1790
1791 BD->setIsVariadic(Record.readInt());
1792 BD->setBlockMissingReturnType(Record.readInt());
1793 BD->setIsConversionFromLambda(Record.readInt());
1794 BD->setDoesNotEscape(Record.readInt());
1795 BD->setCanAvoidCopyToHeap(Record.readInt());
1796
1797 bool capturesCXXThis = Record.readInt();
1798 unsigned numCaptures = Record.readInt();
1799 SmallVector<BlockDecl::Capture, 16> captures;
1800 captures.reserve(N: numCaptures);
1801 for (unsigned i = 0; i != numCaptures; ++i) {
1802 auto *decl = readDeclAs<VarDecl>();
1803 unsigned flags = Record.readInt();
1804 bool byRef = (flags & 1);
1805 bool nested = (flags & 2);
1806 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1807
1808 captures.push_back(Elt: BlockDecl::Capture(decl, byRef, nested, copyExpr));
1809 }
1810 BD->setCaptures(Context&: Reader.getContext(), Captures: captures, CapturesCXXThis: capturesCXXThis);
1811}
1812
1813void ASTDeclReader::VisitOutlinedFunctionDecl(OutlinedFunctionDecl *D) {
1814 // NumParams is deserialized by OutlinedFunctionDecl::CreateDeserialized().
1815 VisitDecl(D);
1816 for (unsigned I = 0; I < D->NumParams; ++I)
1817 D->setParam(i: I, P: readDeclAs<ImplicitParamDecl>());
1818 D->setNothrow(Record.readInt() != 0);
1819 D->setBody(cast_or_null<Stmt>(Val: Record.readStmt()));
1820}
1821
1822void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1823 VisitDecl(D: CD);
1824 unsigned ContextParamPos = Record.readInt();
1825 CD->setNothrow(Record.readInt() != 0);
1826 // Body is set by VisitCapturedStmt.
1827 for (unsigned I = 0; I < CD->NumParams; ++I) {
1828 if (I != ContextParamPos)
1829 CD->setParam(i: I, P: readDeclAs<ImplicitParamDecl>());
1830 else
1831 CD->setContextParam(i: I, P: readDeclAs<ImplicitParamDecl>());
1832 }
1833}
1834
1835void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1836 VisitDecl(D);
1837 D->setLanguage(static_cast<LinkageSpecLanguageIDs>(Record.readInt()));
1838 D->setExternLoc(readSourceLocation());
1839 D->setRBraceLoc(readSourceLocation());
1840}
1841
1842void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1843 VisitDecl(D);
1844 D->RBraceLoc = readSourceLocation();
1845}
1846
1847void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1848 VisitNamedDecl(ND: D);
1849 D->setLocStart(readSourceLocation());
1850}
1851
1852void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1853 RedeclarableResult Redecl = VisitRedeclarable(D);
1854 VisitNamedDecl(ND: D);
1855
1856 BitsUnpacker NamespaceDeclBits(Record.readInt());
1857 D->setInline(NamespaceDeclBits.getNextBit());
1858 D->setNested(NamespaceDeclBits.getNextBit());
1859 D->LocStart = readSourceLocation();
1860 D->RBraceLoc = readSourceLocation();
1861
1862 // Defer loading the anonymous namespace until we've finished merging
1863 // this namespace; loading it might load a later declaration of the
1864 // same namespace, and we have an invariant that older declarations
1865 // get merged before newer ones try to merge.
1866 GlobalDeclID AnonNamespace;
1867 if (Redecl.getFirstID() == ThisDeclID)
1868 AnonNamespace = readDeclID();
1869
1870 mergeRedeclarable(DBase: D, Redecl);
1871
1872 if (AnonNamespace.isValid()) {
1873 // Each module has its own anonymous namespace, which is disjoint from
1874 // any other module's anonymous namespaces, so don't attach the anonymous
1875 // namespace at all.
1876 auto *Anon = cast<NamespaceDecl>(Val: Reader.GetDecl(ID: AnonNamespace));
1877 if (!Record.isModule())
1878 D->setAnonymousNamespace(Anon);
1879 }
1880}
1881
1882void ASTDeclReader::VisitHLSLBufferDecl(HLSLBufferDecl *D) {
1883 VisitNamedDecl(ND: D);
1884 LookupBlockOffsets Offsets;
1885 VisitDeclContext(DC: D, Offsets);
1886 D->IsCBuffer = Record.readBool();
1887 D->KwLoc = readSourceLocation();
1888 D->LBraceLoc = readSourceLocation();
1889 D->RBraceLoc = readSourceLocation();
1890}
1891
1892void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1893 RedeclarableResult Redecl = VisitRedeclarable(D);
1894 VisitNamedDecl(ND: D);
1895 D->NamespaceLoc = readSourceLocation();
1896 D->IdentLoc = readSourceLocation();
1897 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1898 D->Namespace = readDeclAs<NamespaceBaseDecl>();
1899 mergeRedeclarable(DBase: D, Redecl);
1900}
1901
1902void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1903 VisitNamedDecl(ND: D);
1904 D->setUsingLoc(readSourceLocation());
1905 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1906 D->DNLoc = Record.readDeclarationNameLoc(Name: D->getDeclName());
1907 D->FirstUsingShadow.setPointer(readDeclAs<UsingShadowDecl>());
1908 D->setTypename(Record.readInt());
1909 if (auto *Pattern = readDeclAs<NamedDecl>())
1910 Reader.getContext().setInstantiatedFromUsingDecl(Inst: D, Pattern);
1911 mergeMergeable(D);
1912}
1913
1914void ASTDeclReader::VisitUsingEnumDecl(UsingEnumDecl *D) {
1915 VisitNamedDecl(ND: D);
1916 D->setUsingLoc(readSourceLocation());
1917 D->setEnumLoc(readSourceLocation());
1918 D->setEnumType(Record.readTypeSourceInfo());
1919 D->FirstUsingShadow.setPointer(readDeclAs<UsingShadowDecl>());
1920 if (auto *Pattern = readDeclAs<UsingEnumDecl>())
1921 Reader.getContext().setInstantiatedFromUsingEnumDecl(Inst: D, Pattern);
1922 mergeMergeable(D);
1923}
1924
1925void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1926 VisitNamedDecl(ND: D);
1927 D->InstantiatedFrom = readDeclAs<NamedDecl>();
1928 auto **Expansions = D->getTrailingObjects();
1929 for (unsigned I = 0; I != D->NumExpansions; ++I)
1930 Expansions[I] = readDeclAs<NamedDecl>();
1931 mergeMergeable(D);
1932}
1933
1934void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1935 RedeclarableResult Redecl = VisitRedeclarable(D);
1936 VisitNamedDecl(ND: D);
1937 D->Underlying = readDeclAs<NamedDecl>();
1938 D->IdentifierNamespace = Record.readInt();
1939 D->UsingOrNextShadow = readDeclAs<NamedDecl>();
1940 auto *Pattern = readDeclAs<UsingShadowDecl>();
1941 if (Pattern)
1942 Reader.getContext().setInstantiatedFromUsingShadowDecl(Inst: D, Pattern);
1943 mergeRedeclarable(DBase: D, Redecl);
1944}
1945
1946void ASTDeclReader::VisitConstructorUsingShadowDecl(
1947 ConstructorUsingShadowDecl *D) {
1948 VisitUsingShadowDecl(D);
1949 D->NominatedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1950 D->ConstructedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1951 D->IsVirtual = Record.readInt();
1952}
1953
1954void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1955 VisitNamedDecl(ND: D);
1956 D->UsingLoc = readSourceLocation();
1957 D->NamespaceLoc = readSourceLocation();
1958 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1959 D->NominatedNamespace = readDeclAs<NamedDecl>();
1960 D->CommonAncestor = readDeclAs<DeclContext>();
1961}
1962
1963void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1964 VisitValueDecl(VD: D);
1965 D->setUsingLoc(readSourceLocation());
1966 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1967 D->DNLoc = Record.readDeclarationNameLoc(Name: D->getDeclName());
1968 D->EllipsisLoc = readSourceLocation();
1969 mergeMergeable(D);
1970}
1971
1972void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1973 UnresolvedUsingTypenameDecl *D) {
1974 VisitTypeDecl(TD: D);
1975 D->TypenameLocation = readSourceLocation();
1976 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1977 D->EllipsisLoc = readSourceLocation();
1978 mergeMergeable(D);
1979}
1980
1981void ASTDeclReader::VisitUnresolvedUsingIfExistsDecl(
1982 UnresolvedUsingIfExistsDecl *D) {
1983 VisitNamedDecl(ND: D);
1984}
1985
1986void ASTDeclReader::ReadCXXDefinitionData(
1987 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D,
1988 Decl *LambdaContext, unsigned IndexInLambdaContext) {
1989
1990 BitsUnpacker CXXRecordDeclBits = Record.readInt();
1991
1992#define FIELD(Name, Width, Merge) \
1993 if (!CXXRecordDeclBits.canGetNextNBits(Width)) \
1994 CXXRecordDeclBits.updateValue(Record.readInt()); \
1995 Data.Name = CXXRecordDeclBits.getNextBits(Width);
1996
1997#include "clang/AST/CXXRecordDeclDefinitionBits.def"
1998#undef FIELD
1999
2000 // Note: the caller has deserialized the IsLambda bit already.
2001 Data.ODRHash = Record.readInt();
2002 Data.HasODRHash = true;
2003
2004 if (Record.readInt()) {
2005 Reader.DefinitionSource[D] =
2006 Loc.F->Kind == ModuleKind::MK_MainFile ||
2007 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
2008 }
2009
2010 Record.readUnresolvedSet(Set&: Data.Conversions);
2011 Data.ComputedVisibleConversions = Record.readInt();
2012 if (Data.ComputedVisibleConversions)
2013 Record.readUnresolvedSet(Set&: Data.VisibleConversions);
2014 assert(Data.Definition && "Data.Definition should be already set!");
2015
2016 if (!Data.IsLambda) {
2017 assert(!LambdaContext && !IndexInLambdaContext &&
2018 "given lambda context for non-lambda");
2019
2020 Data.NumBases = Record.readInt();
2021 if (Data.NumBases)
2022 Data.Bases = ReadGlobalOffset();
2023
2024 Data.NumVBases = Record.readInt();
2025 if (Data.NumVBases)
2026 Data.VBases = ReadGlobalOffset();
2027
2028 Data.FirstFriend = readDeclID().getRawValue();
2029 } else {
2030 using Capture = LambdaCapture;
2031
2032 auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
2033
2034 BitsUnpacker LambdaBits(Record.readInt());
2035 Lambda.DependencyKind = LambdaBits.getNextBits(/*Width=*/2);
2036 Lambda.IsGenericLambda = LambdaBits.getNextBit();
2037 Lambda.CaptureDefault = LambdaBits.getNextBits(/*Width=*/2);
2038 Lambda.NumCaptures = LambdaBits.getNextBits(/*Width=*/15);
2039 Lambda.HasKnownInternalLinkage = LambdaBits.getNextBit();
2040
2041 Lambda.NumExplicitCaptures = Record.readInt();
2042 Lambda.ManglingNumber = Record.readInt();
2043 if (unsigned DeviceManglingNumber = Record.readInt())
2044 Reader.getContext().DeviceLambdaManglingNumbers[D] = DeviceManglingNumber;
2045 Lambda.IndexInContext = IndexInLambdaContext;
2046 Lambda.ContextDecl = LambdaContext;
2047 Capture *ToCapture = nullptr;
2048 if (Lambda.NumCaptures) {
2049 ToCapture = (Capture *)Reader.getContext().Allocate(Size: sizeof(Capture) *
2050 Lambda.NumCaptures);
2051 Lambda.AddCaptureList(Ctx&: Reader.getContext(), CaptureList: ToCapture);
2052 }
2053 Lambda.MethodTyInfo = readTypeSourceInfo();
2054 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
2055 SourceLocation Loc = readSourceLocation();
2056 BitsUnpacker CaptureBits(Record.readInt());
2057 bool IsImplicit = CaptureBits.getNextBit();
2058 auto Kind =
2059 static_cast<LambdaCaptureKind>(CaptureBits.getNextBits(/*Width=*/3));
2060 switch (Kind) {
2061 case LCK_StarThis:
2062 case LCK_This:
2063 case LCK_VLAType:
2064 new (ToCapture)
2065 Capture(Loc, IsImplicit, Kind, nullptr, SourceLocation());
2066 ToCapture++;
2067 break;
2068 case LCK_ByCopy:
2069 case LCK_ByRef:
2070 auto *Var = readDeclAs<ValueDecl>();
2071 SourceLocation EllipsisLoc = readSourceLocation();
2072 new (ToCapture) Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
2073 ToCapture++;
2074 break;
2075 }
2076 }
2077 }
2078}
2079
2080void ASTDeclMerger::MergeDefinitionData(
2081 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
2082 assert(D->DefinitionData &&
2083 "merging class definition into non-definition");
2084 auto &DD = *D->DefinitionData;
2085
2086 if (DD.Definition != MergeDD.Definition) {
2087 // Track that we merged the definitions.
2088 Reader.MergedDeclContexts.insert(KV: std::make_pair(x&: MergeDD.Definition,
2089 y&: DD.Definition));
2090 Reader.PendingDefinitions.erase(Ptr: MergeDD.Definition);
2091 MergeDD.Definition->demoteThisDefinitionToDeclaration();
2092 Reader.mergeDefinitionVisibility(Def: DD.Definition, MergedDef: MergeDD.Definition);
2093 assert(!Reader.Lookups.contains(MergeDD.Definition) &&
2094 "already loaded pending lookups for merged definition");
2095 }
2096
2097 auto PFDI = Reader.PendingFakeDefinitionData.find(Val: &DD);
2098 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
2099 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
2100 // We faked up this definition data because we found a class for which we'd
2101 // not yet loaded the definition. Replace it with the real thing now.
2102 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
2103 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
2104
2105 // Don't change which declaration is the definition; that is required
2106 // to be invariant once we select it.
2107 auto *Def = DD.Definition;
2108 DD = std::move(MergeDD);
2109 DD.Definition = Def;
2110 for (auto *R = Reader.getMostRecentExistingDecl(D: Def); R;
2111 R = R->getPreviousDecl())
2112 cast<CXXRecordDecl>(Val: R)->DefinitionData = &DD;
2113 return;
2114 }
2115
2116 bool DetectedOdrViolation = false;
2117
2118 #define FIELD(Name, Width, Merge) Merge(Name)
2119 #define MERGE_OR(Field) DD.Field |= MergeDD.Field;
2120 #define NO_MERGE(Field) \
2121 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
2122 MERGE_OR(Field)
2123 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
2124 NO_MERGE(IsLambda)
2125 #undef NO_MERGE
2126 #undef MERGE_OR
2127
2128 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
2129 DetectedOdrViolation = true;
2130 // FIXME: Issue a diagnostic if the base classes don't match when we come
2131 // to lazily load them.
2132
2133 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
2134 // match when we come to lazily load them.
2135 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
2136 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
2137 DD.ComputedVisibleConversions = true;
2138 }
2139
2140 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
2141 // lazily load it.
2142
2143 if (DD.IsLambda) {
2144 auto &Lambda1 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(DD);
2145 auto &Lambda2 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(MergeDD);
2146 DetectedOdrViolation |= Lambda1.DependencyKind != Lambda2.DependencyKind;
2147 DetectedOdrViolation |= Lambda1.IsGenericLambda != Lambda2.IsGenericLambda;
2148 DetectedOdrViolation |= Lambda1.CaptureDefault != Lambda2.CaptureDefault;
2149 DetectedOdrViolation |= Lambda1.NumCaptures != Lambda2.NumCaptures;
2150 DetectedOdrViolation |=
2151 Lambda1.NumExplicitCaptures != Lambda2.NumExplicitCaptures;
2152 DetectedOdrViolation |=
2153 Lambda1.HasKnownInternalLinkage != Lambda2.HasKnownInternalLinkage;
2154 DetectedOdrViolation |= Lambda1.ManglingNumber != Lambda2.ManglingNumber;
2155
2156 if (Lambda1.NumCaptures && Lambda1.NumCaptures == Lambda2.NumCaptures) {
2157 for (unsigned I = 0, N = Lambda1.NumCaptures; I != N; ++I) {
2158 LambdaCapture &Cap1 = Lambda1.Captures.front()[I];
2159 LambdaCapture &Cap2 = Lambda2.Captures.front()[I];
2160 DetectedOdrViolation |= Cap1.getCaptureKind() != Cap2.getCaptureKind();
2161 }
2162 Lambda1.AddCaptureList(Ctx&: Reader.getContext(), CaptureList: Lambda2.Captures.front());
2163 }
2164 }
2165
2166 // We don't want to check ODR for decls in the global module fragment.
2167 if (shouldSkipCheckingODR(D: MergeDD.Definition) || shouldSkipCheckingODR(D))
2168 return;
2169
2170 if (D->getODRHash() != MergeDD.ODRHash) {
2171 DetectedOdrViolation = true;
2172 }
2173
2174 if (DetectedOdrViolation)
2175 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
2176 Elt: {MergeDD.Definition, &MergeDD});
2177}
2178
2179void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update,
2180 Decl *LambdaContext,
2181 unsigned IndexInLambdaContext) {
2182 struct CXXRecordDecl::DefinitionData *DD;
2183 ASTContext &C = Reader.getContext();
2184
2185 // Determine whether this is a lambda closure type, so that we can
2186 // allocate the appropriate DefinitionData structure.
2187 bool IsLambda = Record.readInt();
2188 assert(!(IsLambda && Update) &&
2189 "lambda definition should not be added by update record");
2190 if (IsLambda)
2191 DD = new (C) CXXRecordDecl::LambdaDefinitionData(
2192 D, nullptr, CXXRecordDecl::LDK_Unknown, false, LCD_None);
2193 else
2194 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
2195
2196 CXXRecordDecl *Canon = D->getCanonicalDecl();
2197 // Set decl definition data before reading it, so that during deserialization
2198 // when we read CXXRecordDecl, it already has definition data and we don't
2199 // set fake one.
2200 if (!Canon->DefinitionData)
2201 Canon->DefinitionData = DD;
2202 D->DefinitionData = Canon->DefinitionData;
2203 ReadCXXDefinitionData(Data&: *DD, D, LambdaContext, IndexInLambdaContext);
2204
2205 // Mark this declaration as being a definition.
2206 D->setCompleteDefinition(true);
2207
2208 // We might already have a different definition for this record. This can
2209 // happen either because we're reading an update record, or because we've
2210 // already done some merging. Either way, just merge into it.
2211 if (Canon->DefinitionData != DD) {
2212 MergeImpl.MergeDefinitionData(D: Canon, MergeDD: std::move(*DD));
2213 return;
2214 }
2215
2216 // If this is not the first declaration or is an update record, we can have
2217 // other redeclarations already. Make a note that we need to propagate the
2218 // DefinitionData pointer onto them.
2219 if (Update || Canon != D)
2220 Reader.PendingDefinitions.insert(Ptr: D);
2221}
2222
2223RedeclarableResult ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
2224 RedeclarableResult Redecl = VisitRecordDeclImpl(RD: D);
2225
2226 ASTContext &C = Reader.getContext();
2227
2228 enum CXXRecKind {
2229 CXXRecNotTemplate = 0,
2230 CXXRecTemplate,
2231 CXXRecMemberSpecialization,
2232 CXXLambda
2233 };
2234
2235 Decl *LambdaContext = nullptr;
2236 unsigned IndexInLambdaContext = 0;
2237
2238 switch ((CXXRecKind)Record.readInt()) {
2239 case CXXRecNotTemplate:
2240 // Merged when we merge the folding set entry in the primary template.
2241 if (!isa<ClassTemplateSpecializationDecl>(Val: D))
2242 mergeRedeclarable(DBase: D, Redecl);
2243 break;
2244 case CXXRecTemplate: {
2245 // Merged when we merge the template.
2246 auto *Template = readDeclAs<ClassTemplateDecl>();
2247 D->TemplateOrInstantiation = Template;
2248 break;
2249 }
2250 case CXXRecMemberSpecialization: {
2251 auto *RD = readDeclAs<CXXRecordDecl>();
2252 auto TSK = (TemplateSpecializationKind)Record.readInt();
2253 SourceLocation POI = readSourceLocation();
2254 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
2255 MSI->setPointOfInstantiation(POI);
2256 D->TemplateOrInstantiation = MSI;
2257 mergeRedeclarable(DBase: D, Redecl);
2258 break;
2259 }
2260 case CXXLambda: {
2261 LambdaContext = readDecl();
2262 if (LambdaContext)
2263 IndexInLambdaContext = Record.readInt();
2264 if (LambdaContext)
2265 MergeImpl.mergeLambda(D, Redecl, Context&: *LambdaContext, Number: IndexInLambdaContext);
2266 else
2267 // If we don't have a mangling context, treat this like any other
2268 // declaration.
2269 mergeRedeclarable(DBase: D, Redecl);
2270 break;
2271 }
2272 }
2273
2274 bool WasDefinition = Record.readInt();
2275 if (WasDefinition)
2276 ReadCXXRecordDefinition(D, /*Update=*/false, LambdaContext,
2277 IndexInLambdaContext);
2278 else
2279 // Propagate DefinitionData pointer from the canonical declaration.
2280 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
2281
2282 // Lazily load the key function to avoid deserializing every method so we can
2283 // compute it.
2284 if (WasDefinition) {
2285 GlobalDeclID KeyFn = readDeclID();
2286 if (KeyFn.isValid() && D->isCompleteDefinition())
2287 // FIXME: This is wrong for the ARM ABI, where some other module may have
2288 // made this function no longer be a key function. We need an update
2289 // record or similar for that case.
2290 C.KeyFunctions[D] = KeyFn.getRawValue();
2291 }
2292
2293 return Redecl;
2294}
2295
2296void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
2297 D->setExplicitSpecifier(Record.readExplicitSpec());
2298 D->Ctor = readDeclAs<CXXConstructorDecl>();
2299 VisitFunctionDecl(FD: D);
2300 D->setDeductionCandidateKind(
2301 static_cast<DeductionCandidate>(Record.readInt()));
2302 D->setSourceDeductionGuide(readDeclAs<CXXDeductionGuideDecl>());
2303 D->setSourceDeductionGuideKind(
2304 static_cast<CXXDeductionGuideDecl::SourceDeductionGuideKind>(
2305 Record.readInt()));
2306}
2307
2308void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
2309 VisitFunctionDecl(FD: D);
2310
2311 unsigned NumOverridenMethods = Record.readInt();
2312 if (D->isCanonicalDecl()) {
2313 while (NumOverridenMethods--) {
2314 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
2315 // MD may be initializing.
2316 if (auto *MD = readDeclAs<CXXMethodDecl>())
2317 Reader.getContext().addOverriddenMethod(Method: D, Overridden: MD->getCanonicalDecl());
2318 }
2319 } else {
2320 // We don't care about which declarations this used to override; we get
2321 // the relevant information from the canonical declaration.
2322 Record.skipInts(N: NumOverridenMethods);
2323 }
2324}
2325
2326void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
2327 // We need the inherited constructor information to merge the declaration,
2328 // so we have to read it before we call VisitCXXMethodDecl.
2329 D->setExplicitSpecifier(Record.readExplicitSpec());
2330 if (D->isInheritingConstructor()) {
2331 auto *Shadow = readDeclAs<ConstructorUsingShadowDecl>();
2332 auto *Ctor = readDeclAs<CXXConstructorDecl>();
2333 *D->getTrailingObjects<InheritedConstructor>() =
2334 InheritedConstructor(Shadow, Ctor);
2335 }
2336
2337 VisitCXXMethodDecl(D);
2338}
2339
2340void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
2341 VisitCXXMethodDecl(D);
2342
2343 ASTContext &C = Reader.getContext();
2344 CXXDestructorDecl *Canon = cast<CXXDestructorDecl>(Val: D->getCanonicalDecl());
2345 if (auto *OperatorDelete = readDeclAs<FunctionDecl>()) {
2346 auto *ThisArg = Record.readExpr();
2347 // FIXME: Check consistency if we have an old and new operator delete.
2348 if (!C.dtorHasOperatorDelete(Dtor: D, K: ASTContext::OperatorDeleteKind::Regular)) {
2349 C.addOperatorDeleteForVDtor(Dtor: D, OperatorDelete,
2350 K: ASTContext::OperatorDeleteKind::Regular);
2351 Canon->OperatorDeleteThisArg = ThisArg;
2352 }
2353 }
2354 if (auto *OperatorGlobDelete = readDeclAs<FunctionDecl>()) {
2355 if (!C.dtorHasOperatorDelete(Dtor: D,
2356 K: ASTContext::OperatorDeleteKind::GlobalRegular))
2357 C.addOperatorDeleteForVDtor(
2358 Dtor: D, OperatorDelete: OperatorGlobDelete, K: ASTContext::OperatorDeleteKind::GlobalRegular);
2359 }
2360 if (auto *OperatorArrayDelete = readDeclAs<FunctionDecl>()) {
2361 if (!C.dtorHasOperatorDelete(Dtor: D, K: ASTContext::OperatorDeleteKind::Array))
2362 C.addOperatorDeleteForVDtor(Dtor: D, OperatorDelete: OperatorArrayDelete,
2363 K: ASTContext::OperatorDeleteKind::Array);
2364 }
2365 if (auto *OperatorGlobArrayDelete = readDeclAs<FunctionDecl>()) {
2366 if (!C.dtorHasOperatorDelete(Dtor: D,
2367 K: ASTContext::OperatorDeleteKind::ArrayGlobal))
2368 C.addOperatorDeleteForVDtor(Dtor: D, OperatorDelete: OperatorGlobArrayDelete,
2369 K: ASTContext::OperatorDeleteKind::ArrayGlobal);
2370 }
2371}
2372
2373void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
2374 D->setExplicitSpecifier(Record.readExplicitSpec());
2375 VisitCXXMethodDecl(D);
2376}
2377
2378void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
2379 VisitDecl(D);
2380 D->ImportedModule = readModule();
2381 D->setImportComplete(Record.readInt());
2382 auto *StoredLocs = D->getTrailingObjects();
2383 for (unsigned I = 0, N = Record.back(); I != N; ++I)
2384 StoredLocs[I] = readSourceLocation();
2385 Record.skipInts(N: 1); // The number of stored source locations.
2386}
2387
2388void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
2389 VisitDecl(D);
2390 D->setColonLoc(readSourceLocation());
2391}
2392
2393void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
2394 VisitDecl(D);
2395 if (Record.readInt()) // hasFriendDecl
2396 D->Friend = readDeclAs<NamedDecl>();
2397 else
2398 D->Friend = readTypeSourceInfo();
2399 for (unsigned i = 0; i != D->NumTPLists; ++i)
2400 D->getTrailingObjects()[i] = Record.readTemplateParameterList();
2401 D->NextFriend = readDeclID().getRawValue();
2402 D->UnsupportedFriend = (Record.readInt() != 0);
2403 D->FriendLoc = readSourceLocation();
2404 D->EllipsisLoc = readSourceLocation();
2405}
2406
2407void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
2408 VisitDecl(D);
2409 unsigned NumParams = Record.readInt();
2410 D->NumParams = NumParams;
2411 D->Params = new (Reader.getContext()) TemplateParameterList *[NumParams];
2412 for (unsigned i = 0; i != NumParams; ++i)
2413 D->Params[i] = Record.readTemplateParameterList();
2414 if (Record.readInt()) // HasFriendDecl
2415 D->Friend = readDeclAs<NamedDecl>();
2416 else
2417 D->Friend = readTypeSourceInfo();
2418 D->FriendLoc = readSourceLocation();
2419}
2420
2421void ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
2422 VisitNamedDecl(ND: D);
2423
2424 assert(!D->TemplateParams && "TemplateParams already set!");
2425 D->TemplateParams = Record.readTemplateParameterList();
2426 D->init(NewTemplatedDecl: readDeclAs<NamedDecl>());
2427}
2428
2429void ASTDeclReader::VisitConceptDecl(ConceptDecl *D) {
2430 VisitTemplateDecl(D);
2431 D->ConstraintExpr = Record.readExpr();
2432 mergeMergeable(D);
2433}
2434
2435void ASTDeclReader::VisitImplicitConceptSpecializationDecl(
2436 ImplicitConceptSpecializationDecl *D) {
2437 // The size of the template list was read during creation of the Decl, so we
2438 // don't have to re-read it here.
2439 VisitDecl(D);
2440 llvm::SmallVector<TemplateArgument, 4> Args;
2441 for (unsigned I = 0; I < D->NumTemplateArgs; ++I)
2442 Args.push_back(Elt: Record.readTemplateArgument(/*Canonicalize=*/false));
2443 D->setTemplateArguments(Args);
2444}
2445
2446void ASTDeclReader::VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D) {
2447}
2448
2449void ASTDeclReader::ReadSpecializations(ModuleFile &M, Decl *D,
2450 llvm::BitstreamCursor &DeclsCursor,
2451 bool IsPartial) {
2452 uint64_t Offset = ReadLocalOffset();
2453 bool Failed =
2454 Reader.ReadSpecializations(M, Cursor&: DeclsCursor, Offset, D, IsPartial);
2455 (void)Failed;
2456 assert(!Failed);
2457}
2458
2459RedeclarableResult
2460ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
2461 RedeclarableResult Redecl = VisitRedeclarable(D);
2462
2463 // Make sure we've allocated the Common pointer first. We do this before
2464 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2465 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
2466 if (!CanonD->Common) {
2467 CanonD->Common = CanonD->newCommon(C&: Reader.getContext());
2468 Reader.PendingDefinitions.insert(Ptr: CanonD);
2469 }
2470 D->Common = CanonD->Common;
2471
2472 // If this is the first declaration of the template, fill in the information
2473 // for the 'common' pointer.
2474 if (ThisDeclID == Redecl.getFirstID()) {
2475 if (auto *RTD = readDeclAs<RedeclarableTemplateDecl>()) {
2476 assert(RTD->getKind() == D->getKind() &&
2477 "InstantiatedFromMemberTemplate kind mismatch");
2478 D->setInstantiatedFromMemberTemplate(RTD);
2479 if (Record.readInt())
2480 D->setMemberSpecialization();
2481 }
2482 }
2483
2484 VisitTemplateDecl(D);
2485 D->IdentifierNamespace = Record.readInt();
2486
2487 return Redecl;
2488}
2489
2490void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2491 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2492 mergeRedeclarableTemplate(D, Redecl);
2493
2494 if (ThisDeclID == Redecl.getFirstID()) {
2495 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2496 // the specializations.
2497 ReadSpecializations(M&: *Loc.F, D, DeclsCursor&: Loc.F->DeclsCursor, /*IsPartial=*/false);
2498 ReadSpecializations(M&: *Loc.F, D, DeclsCursor&: Loc.F->DeclsCursor, /*IsPartial=*/true);
2499 }
2500}
2501
2502void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2503 llvm_unreachable("BuiltinTemplates are not serialized");
2504}
2505
2506/// TODO: Unify with ClassTemplateDecl version?
2507/// May require unifying ClassTemplateDecl and
2508/// VarTemplateDecl beyond TemplateDecl...
2509void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2510 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2511 mergeRedeclarableTemplate(D, Redecl);
2512
2513 if (ThisDeclID == Redecl.getFirstID()) {
2514 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2515 // the specializations.
2516 ReadSpecializations(M&: *Loc.F, D, DeclsCursor&: Loc.F->DeclsCursor, /*IsPartial=*/false);
2517 ReadSpecializations(M&: *Loc.F, D, DeclsCursor&: Loc.F->DeclsCursor, /*IsPartial=*/true);
2518 }
2519}
2520
2521RedeclarableResult ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2522 ClassTemplateSpecializationDecl *D) {
2523 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2524
2525 ASTContext &C = Reader.getContext();
2526 if (Decl *InstD = readDecl()) {
2527 if (auto *CTD = dyn_cast<ClassTemplateDecl>(Val: InstD)) {
2528 D->SpecializedTemplate = CTD;
2529 } else {
2530 SmallVector<TemplateArgument, 8> TemplArgs;
2531 Record.readTemplateArgumentList(TemplArgs);
2532 TemplateArgumentList *ArgList
2533 = TemplateArgumentList::CreateCopy(Context&: C, Args: TemplArgs);
2534 auto *PS =
2535 new (C) ClassTemplateSpecializationDecl::
2536 SpecializedPartialSpecialization();
2537 PS->PartialSpecialization
2538 = cast<ClassTemplatePartialSpecializationDecl>(Val: InstD);
2539 PS->TemplateArgs = ArgList;
2540 D->SpecializedTemplate = PS;
2541 }
2542 }
2543
2544 SmallVector<TemplateArgument, 8> TemplArgs;
2545 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2546 D->TemplateArgs = TemplateArgumentList::CreateCopy(Context&: C, Args: TemplArgs);
2547 D->PointOfInstantiation = readSourceLocation();
2548 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2549 D->StrictPackMatch = Record.readBool();
2550
2551 bool writtenAsCanonicalDecl = Record.readInt();
2552 if (writtenAsCanonicalDecl) {
2553 auto *CanonPattern = readDeclAs<ClassTemplateDecl>();
2554 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2555 // Set this as, or find, the canonical declaration for this specialization
2556 ClassTemplateSpecializationDecl *CanonSpec;
2557 if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(Val: D)) {
2558 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2559 .GetOrInsertNode(N: Partial);
2560 } else {
2561 CanonSpec =
2562 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(N: D);
2563 }
2564 // If there was already a canonical specialization, merge into it.
2565 if (CanonSpec != D) {
2566 MergeImpl.mergeRedeclarable<TagDecl>(D, Existing: CanonSpec, Redecl);
2567
2568 // This declaration might be a definition. Merge with any existing
2569 // definition.
2570 if (auto *DDD = D->DefinitionData) {
2571 if (CanonSpec->DefinitionData)
2572 MergeImpl.MergeDefinitionData(D: CanonSpec, MergeDD: std::move(*DDD));
2573 else
2574 CanonSpec->DefinitionData = D->DefinitionData;
2575 }
2576 D->DefinitionData = CanonSpec->DefinitionData;
2577 }
2578 }
2579 }
2580
2581 // extern/template keyword locations for explicit instantiations
2582 if (Record.readBool()) {
2583 auto *ExplicitInfo = new (C) ExplicitInstantiationInfo;
2584 ExplicitInfo->ExternKeywordLoc = readSourceLocation();
2585 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2586 D->ExplicitInfo = ExplicitInfo;
2587 }
2588
2589 if (Record.readBool())
2590 D->setTemplateArgsAsWritten(Record.readASTTemplateArgumentListInfo());
2591
2592 return Redecl;
2593}
2594
2595void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2596 ClassTemplatePartialSpecializationDecl *D) {
2597 // We need to read the template params first because redeclarable is going to
2598 // need them for profiling
2599 TemplateParameterList *Params = Record.readTemplateParameterList();
2600 D->TemplateParams = Params;
2601
2602 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2603
2604 // These are read/set from/to the first declaration.
2605 if (ThisDeclID == Redecl.getFirstID()) {
2606 D->InstantiatedFromMember.setPointer(
2607 readDeclAs<ClassTemplatePartialSpecializationDecl>());
2608 D->InstantiatedFromMember.setInt(Record.readInt());
2609 }
2610}
2611
2612void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2613 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2614
2615 if (ThisDeclID == Redecl.getFirstID()) {
2616 // This FunctionTemplateDecl owns a CommonPtr; read it.
2617 ReadSpecializations(M&: *Loc.F, D, DeclsCursor&: Loc.F->DeclsCursor, /*IsPartial=*/false);
2618 }
2619}
2620
2621/// TODO: Unify with ClassTemplateSpecializationDecl version?
2622/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2623/// VarTemplate(Partial)SpecializationDecl with a new data
2624/// structure Template(Partial)SpecializationDecl, and
2625/// using Template(Partial)SpecializationDecl as input type.
2626RedeclarableResult ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2627 VarTemplateSpecializationDecl *D) {
2628 ASTContext &C = Reader.getContext();
2629 if (Decl *InstD = readDecl()) {
2630 if (auto *VTD = dyn_cast<VarTemplateDecl>(Val: InstD)) {
2631 D->SpecializedTemplate = VTD;
2632 } else {
2633 SmallVector<TemplateArgument, 8> TemplArgs;
2634 Record.readTemplateArgumentList(TemplArgs);
2635 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2636 Context&: C, Args: TemplArgs);
2637 auto *PS =
2638 new (C)
2639 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2640 PS->PartialSpecialization =
2641 cast<VarTemplatePartialSpecializationDecl>(Val: InstD);
2642 PS->TemplateArgs = ArgList;
2643 D->SpecializedTemplate = PS;
2644 }
2645 }
2646
2647 // extern/template keyword locations for explicit instantiations
2648 if (Record.readBool()) {
2649 auto *ExplicitInfo = new (C) ExplicitInstantiationInfo;
2650 ExplicitInfo->ExternKeywordLoc = readSourceLocation();
2651 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2652 D->ExplicitInfo = ExplicitInfo;
2653 }
2654
2655 if (Record.readBool())
2656 D->setTemplateArgsAsWritten(Record.readASTTemplateArgumentListInfo());
2657
2658 SmallVector<TemplateArgument, 8> TemplArgs;
2659 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2660 D->TemplateArgs = TemplateArgumentList::CreateCopy(Context&: C, Args: TemplArgs);
2661 D->PointOfInstantiation = readSourceLocation();
2662 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2663 D->IsCompleteDefinition = Record.readInt();
2664
2665 RedeclarableResult Redecl = VisitVarDeclImpl(VD: D);
2666
2667 bool writtenAsCanonicalDecl = Record.readInt();
2668 if (writtenAsCanonicalDecl) {
2669 auto *CanonPattern = readDeclAs<VarTemplateDecl>();
2670 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2671 VarTemplateSpecializationDecl *CanonSpec;
2672 if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(Val: D)) {
2673 CanonSpec = CanonPattern->getCommonPtr()
2674 ->PartialSpecializations.GetOrInsertNode(N: Partial);
2675 } else {
2676 CanonSpec =
2677 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(N: D);
2678 }
2679 // If we already have a matching specialization, merge it.
2680 if (CanonSpec != D)
2681 MergeImpl.mergeRedeclarable<VarDecl>(D, Existing: CanonSpec, Redecl);
2682 }
2683 }
2684
2685 return Redecl;
2686}
2687
2688/// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2689/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2690/// VarTemplate(Partial)SpecializationDecl with a new data
2691/// structure Template(Partial)SpecializationDecl, and
2692/// using Template(Partial)SpecializationDecl as input type.
2693void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2694 VarTemplatePartialSpecializationDecl *D) {
2695 TemplateParameterList *Params = Record.readTemplateParameterList();
2696 D->TemplateParams = Params;
2697
2698 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2699
2700 // These are read/set from/to the first declaration.
2701 if (ThisDeclID == Redecl.getFirstID()) {
2702 D->InstantiatedFromMember.setPointer(
2703 readDeclAs<VarTemplatePartialSpecializationDecl>());
2704 D->InstantiatedFromMember.setInt(Record.readInt());
2705 }
2706}
2707
2708void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2709 VisitTypeDecl(TD: D);
2710
2711 D->setDeclaredWithTypename(Record.readInt());
2712
2713 bool TypeConstraintInitialized = D->hasTypeConstraint() && Record.readBool();
2714 if (TypeConstraintInitialized) {
2715 ConceptReference *CR = nullptr;
2716 if (Record.readBool())
2717 CR = Record.readConceptReference();
2718 Expr *ImmediatelyDeclaredConstraint = Record.readExpr();
2719 UnsignedOrNone ArgPackSubstIndex = Record.readUnsignedOrNone();
2720
2721 D->setTypeConstraint(CR, ImmediatelyDeclaredConstraint, ArgPackSubstIndex);
2722 D->NumExpanded = Record.readUnsignedOrNone();
2723 }
2724
2725 if (Record.readInt())
2726 D->setDefaultArgument(C: Reader.getContext(),
2727 DefArg: Record.readTemplateArgumentLoc());
2728}
2729
2730void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2731 VisitDeclaratorDecl(DD: D);
2732 // TemplateParmPosition.
2733 D->setDepth(Record.readInt());
2734 D->setPosition(Record.readInt());
2735 if (D->hasPlaceholderTypeConstraint())
2736 D->setPlaceholderTypeConstraint(Record.readExpr());
2737 if (D->isExpandedParameterPack()) {
2738 auto TypesAndInfos =
2739 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2740 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2741 new (&TypesAndInfos[I].first) QualType(Record.readType());
2742 TypesAndInfos[I].second = readTypeSourceInfo();
2743 }
2744 } else {
2745 // Rest of NonTypeTemplateParmDecl.
2746 D->ParameterPack = Record.readInt();
2747 if (Record.readInt())
2748 D->setDefaultArgument(C: Reader.getContext(),
2749 DefArg: Record.readTemplateArgumentLoc());
2750 }
2751}
2752
2753void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2754 VisitTemplateDecl(D);
2755 D->ParameterKind = static_cast<TemplateNameKind>(Record.readInt());
2756 D->setDeclaredWithTypename(Record.readBool());
2757 // TemplateParmPosition.
2758 D->setDepth(Record.readInt());
2759 D->setPosition(Record.readInt());
2760 if (D->isExpandedParameterPack()) {
2761 auto **Data = D->getTrailingObjects();
2762 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2763 I != N; ++I)
2764 Data[I] = Record.readTemplateParameterList();
2765 } else {
2766 // Rest of TemplateTemplateParmDecl.
2767 D->ParameterPack = Record.readInt();
2768 if (Record.readInt())
2769 D->setDefaultArgument(C: Reader.getContext(),
2770 DefArg: Record.readTemplateArgumentLoc());
2771 }
2772}
2773
2774void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2775 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2776 mergeRedeclarableTemplate(D, Redecl);
2777}
2778
2779void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2780 VisitDecl(D);
2781 D->AssertExprAndFailed.setPointer(Record.readExpr());
2782 D->AssertExprAndFailed.setInt(Record.readInt());
2783 D->Message = cast_or_null<StringLiteral>(Val: Record.readExpr());
2784 D->RParenLoc = readSourceLocation();
2785}
2786
2787void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2788 VisitDecl(D);
2789}
2790
2791void ASTDeclReader::VisitLifetimeExtendedTemporaryDecl(
2792 LifetimeExtendedTemporaryDecl *D) {
2793 VisitDecl(D);
2794 D->ExtendingDecl = readDeclAs<ValueDecl>();
2795 D->ExprWithTemporary = Record.readStmt();
2796 if (Record.readInt()) {
2797 D->Value = new (D->getASTContext()) APValue(Record.readAPValue());
2798 D->getASTContext().addDestruction(Ptr: D->Value);
2799 }
2800 D->ManglingNumber = Record.readInt();
2801 mergeMergeable(D);
2802}
2803
2804void ASTDeclReader::VisitDeclContext(DeclContext *DC,
2805 LookupBlockOffsets &Offsets) {
2806 Offsets.LexicalOffset = ReadLocalOffset();
2807 Offsets.VisibleOffset = ReadLocalOffset();
2808 Offsets.ModuleLocalOffset = ReadLocalOffset();
2809 Offsets.TULocalOffset = ReadLocalOffset();
2810}
2811
2812template <typename T>
2813RedeclarableResult ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2814 GlobalDeclID FirstDeclID = readDeclID();
2815 Decl *MergeWith = nullptr;
2816
2817 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2818 bool IsFirstLocalDecl = false;
2819
2820 uint64_t RedeclOffset = 0;
2821
2822 // invalid FirstDeclID indicates that this declaration was the only
2823 // declaration of its entity, and is used for space optimization.
2824 if (FirstDeclID.isInvalid()) {
2825 FirstDeclID = ThisDeclID;
2826 IsKeyDecl = true;
2827 IsFirstLocalDecl = true;
2828 } else if (unsigned N = Record.readInt()) {
2829 // This declaration was the first local declaration, but may have imported
2830 // other declarations.
2831 IsKeyDecl = N == 1;
2832 IsFirstLocalDecl = true;
2833
2834 // We have some declarations that must be before us in our redeclaration
2835 // chain. Read them now, and remember that we ought to merge with one of
2836 // them.
2837 // FIXME: Provide a known merge target to the second and subsequent such
2838 // declaration.
2839 for (unsigned I = 0; I != N - 1; ++I)
2840 MergeWith = readDecl();
2841
2842 RedeclOffset = ReadLocalOffset();
2843 } else {
2844 // This declaration was not the first local declaration. Read the first
2845 // local declaration now, to trigger the import of other redeclarations.
2846 (void)readDecl();
2847 }
2848
2849 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(ID: FirstDeclID));
2850 if (FirstDecl != D) {
2851 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2852 // We temporarily set the first (canonical) declaration as the previous one
2853 // which is the one that matters and mark the real previous DeclID to be
2854 // loaded & attached later on.
2855 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2856 D->First = FirstDecl->getCanonicalDecl();
2857 }
2858
2859 auto *DAsT = static_cast<T *>(D);
2860
2861 // Note that we need to load local redeclarations of this decl and build a
2862 // decl chain for them. This must happen *after* we perform the preloading
2863 // above; this ensures that the redeclaration chain is built in the correct
2864 // order.
2865 if (IsFirstLocalDecl)
2866 Reader.PendingDeclChains.push_back(Elt: std::make_pair(DAsT, RedeclOffset));
2867
2868 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2869}
2870
2871/// Attempts to merge the given declaration (D) with another declaration
2872/// of the same entity.
2873template <typename T>
2874void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2875 RedeclarableResult &Redecl) {
2876 // If modules are not available, there is no reason to perform this merge.
2877 if (!Reader.getContext().getLangOpts().Modules)
2878 return;
2879
2880 // If we're not the canonical declaration, we don't need to merge.
2881 if (!DBase->isFirstDecl())
2882 return;
2883
2884 auto *D = static_cast<T *>(DBase);
2885
2886 if (auto *Existing = Redecl.getKnownMergeTarget())
2887 // We already know of an existing declaration we should merge with.
2888 MergeImpl.mergeRedeclarable(D, cast<T>(Existing), Redecl);
2889 else if (FindExistingResult ExistingRes = findExisting(D))
2890 if (T *Existing = ExistingRes)
2891 MergeImpl.mergeRedeclarable(D, Existing, Redecl);
2892}
2893
2894/// Attempt to merge D with a previous declaration of the same lambda, which is
2895/// found by its index within its context declaration, if it has one.
2896///
2897/// We can't look up lambdas in their enclosing lexical or semantic context in
2898/// general, because for lambdas in variables, both of those might be a
2899/// namespace or the translation unit.
2900void ASTDeclMerger::mergeLambda(CXXRecordDecl *D, RedeclarableResult &Redecl,
2901 Decl &Context, unsigned IndexInContext) {
2902 // If modules are not available, there is no reason to perform this merge.
2903 if (!Reader.getContext().getLangOpts().Modules)
2904 return;
2905
2906 // If we're not the canonical declaration, we don't need to merge.
2907 if (!D->isFirstDecl())
2908 return;
2909
2910 if (auto *Existing = Redecl.getKnownMergeTarget())
2911 // We already know of an existing declaration we should merge with.
2912 mergeRedeclarable(D, Existing: cast<TagDecl>(Val: Existing), Redecl);
2913
2914 // Look up this lambda to see if we've seen it before. If so, merge with the
2915 // one we already loaded.
2916 NamedDecl *&Slot = Reader.LambdaDeclarationsForMerging[{
2917 Context.getCanonicalDecl(), IndexInContext}];
2918 if (Slot)
2919 mergeRedeclarable(D, Existing: cast<TagDecl>(Val: Slot), Redecl);
2920 else
2921 Slot = D;
2922}
2923
2924void ASTDeclReader::mergeRedeclarableTemplate(RedeclarableTemplateDecl *D,
2925 RedeclarableResult &Redecl) {
2926 mergeRedeclarable(DBase: D, Redecl);
2927 // If we merged the template with a prior declaration chain, merge the
2928 // common pointer.
2929 // FIXME: Actually merge here, don't just overwrite.
2930 D->Common = D->getCanonicalDecl()->Common;
2931}
2932
2933/// "Cast" to type T, asserting if we don't have an implicit conversion.
2934/// We use this to put code in a template that will only be valid for certain
2935/// instantiations.
2936template<typename T> static T assert_cast(T t) { return t; }
2937template<typename T> static T assert_cast(...) {
2938 llvm_unreachable("bad assert_cast");
2939}
2940
2941/// Merge together the pattern declarations from two template
2942/// declarations.
2943void ASTDeclMerger::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2944 RedeclarableTemplateDecl *Existing,
2945 bool IsKeyDecl) {
2946 auto *DPattern = D->getTemplatedDecl();
2947 auto *ExistingPattern = Existing->getTemplatedDecl();
2948 RedeclarableResult Result(
2949 /*MergeWith*/ ExistingPattern,
2950 DPattern->getCanonicalDecl()->getGlobalID(), IsKeyDecl);
2951
2952 if (auto *DClass = dyn_cast<CXXRecordDecl>(Val: DPattern)) {
2953 // Merge with any existing definition.
2954 // FIXME: This is duplicated in several places. Refactor.
2955 auto *ExistingClass =
2956 cast<CXXRecordDecl>(Val: ExistingPattern)->getCanonicalDecl();
2957 if (auto *DDD = DClass->DefinitionData) {
2958 if (ExistingClass->DefinitionData) {
2959 MergeDefinitionData(D: ExistingClass, MergeDD: std::move(*DDD));
2960 } else {
2961 ExistingClass->DefinitionData = DClass->DefinitionData;
2962 // We may have skipped this before because we thought that DClass
2963 // was the canonical declaration.
2964 Reader.PendingDefinitions.insert(Ptr: DClass);
2965 }
2966 }
2967 DClass->DefinitionData = ExistingClass->DefinitionData;
2968
2969 return mergeRedeclarable(D: DClass, Existing: cast<TagDecl>(Val: ExistingPattern),
2970 Redecl&: Result);
2971 }
2972 if (auto *DFunction = dyn_cast<FunctionDecl>(Val: DPattern))
2973 return mergeRedeclarable(D: DFunction, Existing: cast<FunctionDecl>(Val: ExistingPattern),
2974 Redecl&: Result);
2975 if (auto *DVar = dyn_cast<VarDecl>(Val: DPattern))
2976 return mergeRedeclarable(D: DVar, Existing: cast<VarDecl>(Val: ExistingPattern), Redecl&: Result);
2977 if (auto *DAlias = dyn_cast<TypeAliasDecl>(Val: DPattern))
2978 return mergeRedeclarable(D: DAlias, Existing: cast<TypedefNameDecl>(Val: ExistingPattern),
2979 Redecl&: Result);
2980 llvm_unreachable("merged an unknown kind of redeclarable template");
2981}
2982
2983/// Attempts to merge the given declaration (D) with another declaration
2984/// of the same entity.
2985template <typename T>
2986void ASTDeclMerger::mergeRedeclarableImpl(Redeclarable<T> *DBase, T *Existing,
2987 GlobalDeclID KeyDeclID) {
2988 auto *D = static_cast<T *>(DBase);
2989 T *ExistingCanon = Existing->getCanonicalDecl();
2990 T *DCanon = D->getCanonicalDecl();
2991 if (ExistingCanon != DCanon) {
2992 // Have our redeclaration link point back at the canonical declaration
2993 // of the existing declaration, so that this declaration has the
2994 // appropriate canonical declaration.
2995 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2996 D->First = ExistingCanon;
2997 ExistingCanon->Used |= D->Used;
2998 D->Used = false;
2999
3000 bool IsKeyDecl = KeyDeclID.isValid();
3001
3002 // When we merge a template, merge its pattern.
3003 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
3004 mergeTemplatePattern(
3005 D: DTemplate, Existing: assert_cast<RedeclarableTemplateDecl *>(ExistingCanon),
3006 IsKeyDecl);
3007
3008 // If this declaration is a key declaration, make a note of that.
3009 if (IsKeyDecl)
3010 Reader.KeyDecls[ExistingCanon].push_back(KeyDeclID);
3011 }
3012}
3013
3014/// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
3015/// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
3016/// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
3017/// that some types are mergeable during deserialization, otherwise name
3018/// lookup fails. This is the case for EnumConstantDecl.
3019static bool allowODRLikeMergeInC(NamedDecl *ND) {
3020 if (!ND)
3021 return false;
3022 // TODO: implement merge for other necessary decls.
3023 if (isa<EnumConstantDecl, FieldDecl, IndirectFieldDecl>(Val: ND))
3024 return true;
3025 return false;
3026}
3027
3028/// Attempts to merge LifetimeExtendedTemporaryDecl with
3029/// identical class definitions from two different modules.
3030void ASTDeclReader::mergeMergeable(LifetimeExtendedTemporaryDecl *D) {
3031 // If modules are not available, there is no reason to perform this merge.
3032 if (!Reader.getContext().getLangOpts().Modules)
3033 return;
3034
3035 LifetimeExtendedTemporaryDecl *LETDecl = D;
3036
3037 LifetimeExtendedTemporaryDecl *&LookupResult =
3038 Reader.LETemporaryForMerging[std::make_pair(
3039 x: LETDecl->getExtendingDecl(), y: LETDecl->getManglingNumber())];
3040 if (LookupResult)
3041 Reader.getContext().setPrimaryMergedDecl(D: LETDecl,
3042 Primary: LookupResult->getCanonicalDecl());
3043 else
3044 LookupResult = LETDecl;
3045}
3046
3047/// Attempts to merge the given declaration (D) with another declaration
3048/// of the same entity, for the case where the entity is not actually
3049/// redeclarable. This happens, for instance, when merging the fields of
3050/// identical class definitions from two different modules.
3051template<typename T>
3052void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
3053 // If modules are not available, there is no reason to perform this merge.
3054 if (!Reader.getContext().getLangOpts().Modules)
3055 return;
3056
3057 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
3058 // Note that C identically-named things in different translation units are
3059 // not redeclarations, but may still have compatible types, where ODR-like
3060 // semantics may apply.
3061 if (!Reader.getContext().getLangOpts().CPlusPlus &&
3062 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
3063 return;
3064
3065 if (FindExistingResult ExistingRes = findExisting(D: static_cast<T*>(D)))
3066 if (T *Existing = ExistingRes)
3067 Reader.getContext().setPrimaryMergedDecl(D: static_cast<T *>(D),
3068 Primary: Existing->getCanonicalDecl());
3069}
3070
3071void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
3072 Record.readOMPChildren(Data: D->Data);
3073 VisitDecl(D);
3074}
3075
3076void ASTDeclReader::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
3077 Record.readOMPChildren(Data: D->Data);
3078 VisitDecl(D);
3079}
3080
3081void ASTDeclReader::VisitOMPRequiresDecl(OMPRequiresDecl * D) {
3082 Record.readOMPChildren(Data: D->Data);
3083 VisitDecl(D);
3084}
3085
3086void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
3087 VisitValueDecl(VD: D);
3088 D->setLocation(readSourceLocation());
3089 Expr *In = Record.readExpr();
3090 Expr *Out = Record.readExpr();
3091 D->setCombinerData(InE: In, OutE: Out);
3092 Expr *Combiner = Record.readExpr();
3093 D->setCombiner(Combiner);
3094 Expr *Orig = Record.readExpr();
3095 Expr *Priv = Record.readExpr();
3096 D->setInitializerData(OrigE: Orig, PrivE: Priv);
3097 Expr *Init = Record.readExpr();
3098 auto IK = static_cast<OMPDeclareReductionInitKind>(Record.readInt());
3099 D->setInitializer(E: Init, IK);
3100 D->PrevDeclInScope = readDeclID().getRawValue();
3101}
3102
3103void ASTDeclReader::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
3104 Record.readOMPChildren(Data: D->Data);
3105 VisitValueDecl(VD: D);
3106 D->VarName = Record.readDeclarationName();
3107 D->PrevDeclInScope = readDeclID().getRawValue();
3108}
3109
3110void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
3111 VisitVarDecl(VD: D);
3112}
3113
3114void ASTDeclReader::VisitOpenACCDeclareDecl(OpenACCDeclareDecl *D) {
3115 VisitDecl(D);
3116 D->DirKind = Record.readEnum<OpenACCDirectiveKind>();
3117 D->DirectiveLoc = Record.readSourceLocation();
3118 D->EndLoc = Record.readSourceLocation();
3119 Record.readOpenACCClauseList(Clauses: D->Clauses);
3120}
3121void ASTDeclReader::VisitOpenACCRoutineDecl(OpenACCRoutineDecl *D) {
3122 VisitDecl(D);
3123 D->DirKind = Record.readEnum<OpenACCDirectiveKind>();
3124 D->DirectiveLoc = Record.readSourceLocation();
3125 D->EndLoc = Record.readSourceLocation();
3126 D->ParensLoc = Record.readSourceRange();
3127 D->FuncRef = Record.readExpr();
3128 Record.readOpenACCClauseList(Clauses: D->Clauses);
3129}
3130
3131//===----------------------------------------------------------------------===//
3132// Attribute Reading
3133//===----------------------------------------------------------------------===//
3134
3135namespace {
3136class AttrReader {
3137 ASTRecordReader &Reader;
3138
3139public:
3140 AttrReader(ASTRecordReader &Reader) : Reader(Reader) {}
3141
3142 uint64_t readInt() {
3143 return Reader.readInt();
3144 }
3145
3146 bool readBool() { return Reader.readBool(); }
3147
3148 SourceRange readSourceRange() {
3149 return Reader.readSourceRange();
3150 }
3151
3152 SourceLocation readSourceLocation() {
3153 return Reader.readSourceLocation();
3154 }
3155
3156 Expr *readExpr() { return Reader.readExpr(); }
3157
3158 Attr *readAttr() { return Reader.readAttr(); }
3159
3160 std::string readString() {
3161 return Reader.readString();
3162 }
3163
3164 TypeSourceInfo *readTypeSourceInfo() {
3165 return Reader.readTypeSourceInfo();
3166 }
3167
3168 IdentifierInfo *readIdentifier() {
3169 return Reader.readIdentifier();
3170 }
3171
3172 VersionTuple readVersionTuple() {
3173 return Reader.readVersionTuple();
3174 }
3175
3176 OMPTraitInfo *readOMPTraitInfo() { return Reader.readOMPTraitInfo(); }
3177
3178 template <typename T> T *readDeclAs() { return Reader.readDeclAs<T>(); }
3179};
3180}
3181
3182Attr *ASTRecordReader::readAttr() {
3183 AttrReader Record(*this);
3184 auto V = Record.readInt();
3185 if (!V)
3186 return nullptr;
3187
3188 Attr *New = nullptr;
3189 // Kind is stored as a 1-based integer because 0 is used to indicate a null
3190 // Attr pointer.
3191 auto Kind = static_cast<attr::Kind>(V - 1);
3192 ASTContext &Context = getContext();
3193
3194 IdentifierInfo *AttrName = Record.readIdentifier();
3195 IdentifierInfo *ScopeName = Record.readIdentifier();
3196 SourceRange AttrRange = Record.readSourceRange();
3197 SourceLocation ScopeLoc = Record.readSourceLocation();
3198 unsigned ParsedKind = Record.readInt();
3199 unsigned Syntax = Record.readInt();
3200 unsigned SpellingIndex = Record.readInt();
3201 bool IsAlignas = (ParsedKind == AttributeCommonInfo::AT_Aligned &&
3202 Syntax == AttributeCommonInfo::AS_Keyword &&
3203 SpellingIndex == AlignedAttr::Keyword_alignas);
3204 bool IsRegularKeywordAttribute = Record.readBool();
3205
3206 AttributeCommonInfo Info(AttrName, AttributeScopeInfo(ScopeName, ScopeLoc),
3207 AttrRange, AttributeCommonInfo::Kind(ParsedKind),
3208 {AttributeCommonInfo::Syntax(Syntax), SpellingIndex,
3209 IsAlignas, IsRegularKeywordAttribute});
3210
3211#include "clang/Serialization/AttrPCHRead.inc"
3212
3213 assert(New && "Unable to decode attribute?");
3214 return New;
3215}
3216
3217/// Reads attributes from the current stream position.
3218void ASTRecordReader::readAttributes(AttrVec &Attrs) {
3219 for (unsigned I = 0, E = readInt(); I != E; ++I)
3220 if (auto *A = readAttr())
3221 Attrs.push_back(Elt: A);
3222}
3223
3224//===----------------------------------------------------------------------===//
3225// ASTReader Implementation
3226//===----------------------------------------------------------------------===//
3227
3228/// Note that we have loaded the declaration with the given
3229/// Index.
3230///
3231/// This routine notes that this declaration has already been loaded,
3232/// so that future GetDecl calls will return this declaration rather
3233/// than trying to load a new declaration.
3234inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
3235 assert(!DeclsLoaded[Index] && "Decl loaded twice?");
3236 DeclsLoaded[Index] = D;
3237}
3238
3239/// Determine whether the consumer will be interested in seeing
3240/// this declaration (via HandleTopLevelDecl).
3241///
3242/// This routine should return true for anything that might affect
3243/// code generation, e.g., inline function definitions, Objective-C
3244/// declarations with metadata, etc.
3245bool ASTReader::isConsumerInterestedIn(Decl *D) {
3246 // An ObjCMethodDecl is never considered as "interesting" because its
3247 // implementation container always is.
3248
3249 // An ImportDecl or VarDecl imported from a module map module will get
3250 // emitted when we import the relevant module.
3251 if (isPartOfPerModuleInitializer(D)) {
3252 auto *M = D->getImportedOwningModule();
3253 if (M && M->Kind == Module::ModuleMapModule &&
3254 getContext().DeclMustBeEmitted(D))
3255 return false;
3256 }
3257
3258 if (isa<FileScopeAsmDecl, TopLevelStmtDecl, ObjCProtocolDecl, ObjCImplDecl,
3259 ImportDecl, PragmaCommentDecl, PragmaDetectMismatchDecl>(Val: D))
3260 return true;
3261 if (isa<OMPThreadPrivateDecl, OMPDeclareReductionDecl, OMPDeclareMapperDecl,
3262 OMPAllocateDecl, OMPRequiresDecl>(Val: D))
3263 return !D->getDeclContext()->isFunctionOrMethod();
3264 if (const auto *Var = dyn_cast<VarDecl>(Val: D))
3265 return Var->isFileVarDecl() &&
3266 (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
3267 OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD: Var));
3268 if (const auto *Func = dyn_cast<FunctionDecl>(Val: D))
3269 return Func->doesThisDeclarationHaveABody() || PendingBodies.count(Key: D);
3270
3271 if (auto *ES = D->getASTContext().getExternalSource())
3272 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
3273 return true;
3274
3275 return false;
3276}
3277
3278/// Get the correct cursor and offset for loading a declaration.
3279ASTReader::RecordLocation ASTReader::DeclCursorForID(GlobalDeclID ID,
3280 SourceLocation &Loc) {
3281 ModuleFile *M = getOwningModuleFile(ID);
3282 assert(M);
3283 unsigned LocalDeclIndex = ID.getLocalDeclIndex();
3284 const DeclOffset &DOffs = M->DeclOffsets[LocalDeclIndex];
3285 Loc = ReadSourceLocation(MF&: *M, Raw: DOffs.getRawLoc());
3286 return RecordLocation(M, DOffs.getBitOffset(DeclTypesBlockStartOffset: M->DeclsBlockStartOffset));
3287}
3288
3289ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
3290 auto I = GlobalBitOffsetsMap.find(K: GlobalOffset);
3291
3292 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
3293 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
3294}
3295
3296uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint64_t LocalOffset) {
3297 return LocalOffset + M.GlobalBitOffset;
3298}
3299
3300CXXRecordDecl *
3301ASTDeclReader::getOrFakePrimaryClassDefinition(ASTReader &Reader,
3302 CXXRecordDecl *RD) {
3303 // Try to dig out the definition.
3304 auto *DD = RD->DefinitionData;
3305 if (!DD)
3306 DD = RD->getCanonicalDecl()->DefinitionData;
3307
3308 // If there's no definition yet, then DC's definition is added by an update
3309 // record, but we've not yet loaded that update record. In this case, we
3310 // commit to DC being the canonical definition now, and will fix this when
3311 // we load the update record.
3312 if (!DD) {
3313 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3314 RD->setCompleteDefinition(true);
3315 RD->DefinitionData = DD;
3316 RD->getCanonicalDecl()->DefinitionData = DD;
3317
3318 // Track that we did this horrible thing so that we can fix it later.
3319 Reader.PendingFakeDefinitionData.insert(
3320 KV: std::make_pair(x&: DD, y: ASTReader::PendingFakeDefinitionKind::Fake));
3321 }
3322
3323 return DD->Definition;
3324}
3325
3326/// Find the context in which we should search for previous declarations when
3327/// looking for declarations to merge.
3328DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3329 DeclContext *DC) {
3330 if (auto *ND = dyn_cast<NamespaceDecl>(Val: DC))
3331 return ND->getFirstDecl();
3332
3333 if (auto *RD = dyn_cast<CXXRecordDecl>(Val: DC))
3334 return getOrFakePrimaryClassDefinition(Reader, RD);
3335
3336 if (auto *RD = dyn_cast<RecordDecl>(Val: DC))
3337 return RD->getDefinition();
3338
3339 if (auto *ED = dyn_cast<EnumDecl>(Val: DC))
3340 return ED->getDefinition();
3341
3342 if (auto *OID = dyn_cast<ObjCInterfaceDecl>(Val: DC))
3343 return OID->getDefinition();
3344
3345 // We can see the TU here only if we have no Sema object. It is possible
3346 // we're in clang-repl so we still need to get the primary context.
3347 if (auto *TU = dyn_cast<TranslationUnitDecl>(Val: DC))
3348 return TU->getPrimaryContext();
3349
3350 return nullptr;
3351}
3352
3353ASTDeclReader::FindExistingResult::~FindExistingResult() {
3354 // Record that we had a typedef name for linkage whether or not we merge
3355 // with that declaration.
3356 if (TypedefNameForLinkage) {
3357 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3358 Reader.ImportedTypedefNamesForLinkage.insert(
3359 KV: std::make_pair(x: std::make_pair(x&: DC, y&: TypedefNameForLinkage), y&: New));
3360 return;
3361 }
3362
3363 if (!AddResult || Existing)
3364 return;
3365
3366 DeclarationName Name = New->getDeclName();
3367 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3368 if (needsAnonymousDeclarationNumber(D: New)) {
3369 setAnonymousDeclForMerging(Reader, DC: New->getLexicalDeclContext(),
3370 Index: AnonymousDeclNumber, D: New);
3371 } else if (DC->isTranslationUnit() &&
3372 !Reader.getContext().getLangOpts().CPlusPlus) {
3373 if (Reader.getIdResolver().tryAddTopLevelDecl(D: New, Name))
3374 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3375 .push_back(Elt: New);
3376 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3377 // Add the declaration to its redeclaration context so later merging
3378 // lookups will find it.
3379 MergeDC->makeDeclVisibleInContextImpl(D: New, /*Internal*/true);
3380 }
3381}
3382
3383/// Find the declaration that should be merged into, given the declaration found
3384/// by name lookup. If we're merging an anonymous declaration within a typedef,
3385/// we need a matching typedef, and we merge with the type inside it.
3386static NamedDecl *getDeclForMerging(NamedDecl *Found,
3387 bool IsTypedefNameForLinkage) {
3388 if (!IsTypedefNameForLinkage)
3389 return Found;
3390
3391 // If we found a typedef declaration that gives a name to some other
3392 // declaration, then we want that inner declaration. Declarations from
3393 // AST files are handled via ImportedTypedefNamesForLinkage.
3394 if (Found->isFromASTFile())
3395 return nullptr;
3396
3397 if (auto *TND = dyn_cast<TypedefNameDecl>(Val: Found))
3398 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3399
3400 return nullptr;
3401}
3402
3403/// Find the declaration to use to populate the anonymous declaration table
3404/// for the given lexical DeclContext. We only care about finding local
3405/// definitions of the context; we'll merge imported ones as we go.
3406DeclContext *
3407ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3408 // For classes, we track the definition as we merge.
3409 if (auto *RD = dyn_cast<CXXRecordDecl>(Val: LexicalDC)) {
3410 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3411 return DD ? DD->Definition : nullptr;
3412 } else if (auto *OID = dyn_cast<ObjCInterfaceDecl>(Val: LexicalDC)) {
3413 return OID->getCanonicalDecl()->getDefinition();
3414 }
3415
3416 // For anything else, walk its merged redeclarations looking for a definition.
3417 // Note that we can't just call getDefinition here because the redeclaration
3418 // chain isn't wired up.
3419 for (auto *D : merged_redecls(D: cast<Decl>(Val: LexicalDC))) {
3420 if (auto *FD = dyn_cast<FunctionDecl>(Val: D))
3421 if (FD->isThisDeclarationADefinition())
3422 return FD;
3423 if (auto *MD = dyn_cast<ObjCMethodDecl>(Val: D))
3424 if (MD->isThisDeclarationADefinition())
3425 return MD;
3426 if (auto *RD = dyn_cast<RecordDecl>(Val: D))
3427 if (RD->isThisDeclarationADefinition())
3428 return RD;
3429 }
3430
3431 // No merged definition yet.
3432 return nullptr;
3433}
3434
3435NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3436 DeclContext *DC,
3437 unsigned Index) {
3438 // If the lexical context has been merged, look into the now-canonical
3439 // definition.
3440 auto *CanonDC = cast<Decl>(Val: DC)->getCanonicalDecl();
3441
3442 // If we've seen this before, return the canonical declaration.
3443 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3444 if (Index < Previous.size() && Previous[Index])
3445 return Previous[Index];
3446
3447 // If this is the first time, but we have parsed a declaration of the context,
3448 // build the anonymous declaration list from the parsed declaration.
3449 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(LexicalDC: DC);
3450 auto needToNumberAnonymousDeclsWithin = [](Decl *D) {
3451 if (!D->isFromASTFile())
3452 return true;
3453 // If this is a class template specialization from an AST file, has at least
3454 // one field, but none of the fields have been loaded from external storage,
3455 // this is a situation where the class template specialization decl
3456 // was imported but the definition was instantiated within the source.
3457 // In such a case, we still need to number the anonymous decls.
3458 auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(Val: D);
3459 return CTSD && !CTSD->noload_field_empty() &&
3460 !CTSD->hasLoadedFieldsFromExternalStorage();
3461 };
3462 if (PrimaryDC && needToNumberAnonymousDeclsWithin(cast<Decl>(Val: PrimaryDC))) {
3463 numberAnonymousDeclsWithin(DC: PrimaryDC, Visit: [&](NamedDecl *ND, unsigned Number) {
3464 if (Previous.size() == Number)
3465 Previous.push_back(Elt: cast<NamedDecl>(Val: ND->getCanonicalDecl()));
3466 else
3467 Previous[Number] = cast<NamedDecl>(Val: ND->getCanonicalDecl());
3468 });
3469 }
3470
3471 return Index < Previous.size() ? Previous[Index] : nullptr;
3472}
3473
3474void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3475 DeclContext *DC, unsigned Index,
3476 NamedDecl *D) {
3477 auto *CanonDC = cast<Decl>(Val: DC)->getCanonicalDecl();
3478
3479 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3480 if (Index >= Previous.size())
3481 Previous.resize(N: Index + 1);
3482 if (!Previous[Index])
3483 Previous[Index] = D;
3484}
3485
3486ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3487 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3488 : D->getDeclName();
3489
3490 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3491 // Don't bother trying to find unnamed declarations that are in
3492 // unmergeable contexts.
3493 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3494 AnonymousDeclNumber, TypedefNameForLinkage);
3495 Result.suppress();
3496 return Result;
3497 }
3498
3499 ASTContext &C = Reader.getContext();
3500 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3501 if (TypedefNameForLinkage) {
3502 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3503 Val: std::make_pair(x&: DC, y&: TypedefNameForLinkage));
3504 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3505 if (C.isSameEntity(X: It->second, Y: D))
3506 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3507 TypedefNameForLinkage);
3508 // Go on to check in other places in case an existing typedef name
3509 // was not imported.
3510 }
3511
3512 if (needsAnonymousDeclarationNumber(D)) {
3513 // This is an anonymous declaration that we may need to merge. Look it up
3514 // in its context by number.
3515 if (auto *Existing = getAnonymousDeclForMerging(
3516 Reader, DC: D->getLexicalDeclContext(), Index: AnonymousDeclNumber))
3517 if (C.isSameEntity(X: Existing, Y: D))
3518 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3519 TypedefNameForLinkage);
3520 } else if (DC->isTranslationUnit() &&
3521 !Reader.getContext().getLangOpts().CPlusPlus) {
3522 IdentifierResolver &IdResolver = Reader.getIdResolver();
3523
3524 // Temporarily consider the identifier to be up-to-date. We don't want to
3525 // cause additional lookups here.
3526 class UpToDateIdentifierRAII {
3527 IdentifierInfo *II;
3528 bool WasOutToDate = false;
3529
3530 public:
3531 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3532 if (II) {
3533 WasOutToDate = II->isOutOfDate();
3534 if (WasOutToDate)
3535 II->setOutOfDate(false);
3536 }
3537 }
3538
3539 ~UpToDateIdentifierRAII() {
3540 if (WasOutToDate)
3541 II->setOutOfDate(true);
3542 }
3543 } UpToDate(Name.getAsIdentifierInfo());
3544
3545 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3546 IEnd = IdResolver.end();
3547 I != IEnd; ++I) {
3548 if (NamedDecl *Existing = getDeclForMerging(Found: *I, IsTypedefNameForLinkage: TypedefNameForLinkage))
3549 if (C.isSameEntity(X: Existing, Y: D))
3550 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3551 TypedefNameForLinkage);
3552 }
3553 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3554 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3555 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3556 if (NamedDecl *Existing = getDeclForMerging(Found: *I, IsTypedefNameForLinkage: TypedefNameForLinkage))
3557 if (C.isSameEntity(X: Existing, Y: D))
3558 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3559 TypedefNameForLinkage);
3560 }
3561 } else {
3562 // Not in a mergeable context.
3563 return FindExistingResult(Reader);
3564 }
3565
3566 // If this declaration is from a merged context, make a note that we need to
3567 // check that the canonical definition of that context contains the decl.
3568 //
3569 // Note that we don't perform ODR checks for decls from the global module
3570 // fragment.
3571 //
3572 // FIXME: We should do something similar if we merge two definitions of the
3573 // same template specialization into the same CXXRecordDecl.
3574 auto MergedDCIt = Reader.MergedDeclContexts.find(Val: D->getLexicalDeclContext());
3575 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3576 !shouldSkipCheckingODR(D) && MergedDCIt->second == D->getDeclContext() &&
3577 !shouldSkipCheckingODR(D: cast<Decl>(Val: D->getDeclContext())))
3578 Reader.PendingOdrMergeChecks.push_back(Elt: D);
3579
3580 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3581 AnonymousDeclNumber, TypedefNameForLinkage);
3582}
3583
3584template<typename DeclT>
3585Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3586 return D->RedeclLink.getLatestNotUpdated();
3587}
3588
3589Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3590 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3591}
3592
3593Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3594 assert(D);
3595
3596 switch (D->getKind()) {
3597#define ABSTRACT_DECL(TYPE)
3598#define DECL(TYPE, BASE) \
3599 case Decl::TYPE: \
3600 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3601#include "clang/AST/DeclNodes.inc"
3602 }
3603 llvm_unreachable("unknown decl kind");
3604}
3605
3606Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3607 return ASTDeclReader::getMostRecentDecl(D: D->getCanonicalDecl());
3608}
3609
3610namespace {
3611void mergeInheritableAttributes(ASTReader &Reader, Decl *D, Decl *Previous) {
3612 InheritableAttr *NewAttr = nullptr;
3613 ASTContext &Context = Reader.getContext();
3614 const auto *IA = Previous->getAttr<MSInheritanceAttr>();
3615
3616 if (IA && !D->hasAttr<MSInheritanceAttr>()) {
3617 NewAttr = cast<InheritableAttr>(Val: IA->clone(C&: Context));
3618 NewAttr->setInherited(true);
3619 D->addAttr(A: NewAttr);
3620 }
3621
3622 const auto *AA = Previous->getAttr<AvailabilityAttr>();
3623 if (AA && !D->hasAttr<AvailabilityAttr>()) {
3624 NewAttr = AA->clone(C&: Context);
3625 NewAttr->setInherited(true);
3626 D->addAttr(A: NewAttr);
3627 }
3628}
3629} // namespace
3630
3631template<typename DeclT>
3632void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3633 Redeclarable<DeclT> *D,
3634 Decl *Previous, Decl *Canon) {
3635 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3636 D->First = cast<DeclT>(Previous)->First;
3637}
3638
3639namespace clang {
3640
3641template<>
3642void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3643 Redeclarable<VarDecl> *D,
3644 Decl *Previous, Decl *Canon) {
3645 auto *PrevVD = cast<VarDecl>(Val: Previous);
3646 D->RedeclLink.setPrevious(PrevVD);
3647 D->First = PrevVD->First;
3648}
3649
3650static bool isUndeducedReturnType(QualType T) {
3651 auto *DT = T->getContainedDeducedType();
3652 return DT && !DT->isDeduced();
3653}
3654
3655template<>
3656void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3657 Redeclarable<FunctionDecl> *D,
3658 Decl *Previous, Decl *Canon) {
3659 auto *FD = static_cast<FunctionDecl *>(D);
3660 auto *PrevFD = cast<FunctionDecl>(Val: Previous);
3661
3662 FD->RedeclLink.setPrevious(PrevFD);
3663 FD->First = PrevFD->First;
3664
3665 // If the previous declaration is an inline function declaration, then this
3666 // declaration is too.
3667 if (PrevFD->isInlined() != FD->isInlined()) {
3668 // FIXME: [dcl.fct.spec]p4:
3669 // If a function with external linkage is declared inline in one
3670 // translation unit, it shall be declared inline in all translation
3671 // units in which it appears.
3672 //
3673 // Be careful of this case:
3674 //
3675 // module A:
3676 // template<typename T> struct X { void f(); };
3677 // template<typename T> inline void X<T>::f() {}
3678 //
3679 // module B instantiates the declaration of X<int>::f
3680 // module C instantiates the definition of X<int>::f
3681 //
3682 // If module B and C are merged, we do not have a violation of this rule.
3683 FD->setImplicitlyInline(true);
3684 }
3685
3686 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3687 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3688 if (FPT && PrevFPT) {
3689 // If we need to propagate an exception specification along the redecl
3690 // chain, make a note of that so that we can do so later.
3691 bool IsUnresolved = isUnresolvedExceptionSpec(ESpecType: FPT->getExceptionSpecType());
3692 bool WasUnresolved =
3693 isUnresolvedExceptionSpec(ESpecType: PrevFPT->getExceptionSpecType());
3694 if (IsUnresolved != WasUnresolved)
3695 Reader.PendingExceptionSpecUpdates.insert(
3696 KV: {Canon, IsUnresolved ? PrevFD : FD});
3697
3698 // If we need to propagate a deduced return type along the redecl chain,
3699 // make a note of that so that we can do it later.
3700 bool IsUndeduced = isUndeducedReturnType(T: FPT->getReturnType());
3701 bool WasUndeduced = isUndeducedReturnType(T: PrevFPT->getReturnType());
3702 if (IsUndeduced != WasUndeduced)
3703 Reader.PendingDeducedTypeUpdates.insert(
3704 KV: {cast<FunctionDecl>(Val: Canon),
3705 (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3706 }
3707}
3708
3709} // namespace clang
3710
3711void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3712 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3713}
3714
3715/// Inherit the default template argument from \p From to \p To. Returns
3716/// \c false if there is no default template for \p From.
3717template <typename ParmDecl>
3718static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3719 Decl *ToD) {
3720 auto *To = cast<ParmDecl>(ToD);
3721 if (!From->hasDefaultArgument())
3722 return false;
3723 To->setInheritedDefaultArgument(Context, From);
3724 return true;
3725}
3726
3727static void inheritDefaultTemplateArguments(ASTContext &Context,
3728 TemplateDecl *From,
3729 TemplateDecl *To) {
3730 auto *FromTP = From->getTemplateParameters();
3731 auto *ToTP = To->getTemplateParameters();
3732 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3733
3734 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3735 NamedDecl *FromParam = FromTP->getParam(Idx: I);
3736 NamedDecl *ToParam = ToTP->getParam(Idx: I);
3737
3738 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(Val: FromParam))
3739 inheritDefaultTemplateArgument(Context, From: FTTP, ToD: ToParam);
3740 else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(Val: FromParam))
3741 inheritDefaultTemplateArgument(Context, From: FNTTP, ToD: ToParam);
3742 else
3743 inheritDefaultTemplateArgument(
3744 Context, From: cast<TemplateTemplateParmDecl>(Val: FromParam), ToD: ToParam);
3745 }
3746}
3747
3748// [basic.link]/p10:
3749// If two declarations of an entity are attached to different modules,
3750// the program is ill-formed;
3751void ASTDeclReader::checkMultipleDefinitionInNamedModules(ASTReader &Reader,
3752 Decl *D,
3753 Decl *Previous) {
3754 // If it is previous implcitly introduced, it is not meaningful to
3755 // diagnose it.
3756 if (Previous->isImplicit())
3757 return;
3758
3759 // FIXME: Get rid of the enumeration of decl types once we have an appropriate
3760 // abstract for decls of an entity. e.g., the namespace decl and using decl
3761 // doesn't introduce an entity.
3762 if (!isa<VarDecl, FunctionDecl, TagDecl, RedeclarableTemplateDecl>(Val: Previous))
3763 return;
3764
3765 // Skip implicit instantiations since it may give false positive diagnostic
3766 // messages.
3767 // FIXME: Maybe this shows the implicit instantiations may have incorrect
3768 // module owner ships. But given we've finished the compilation of a module,
3769 // how can we add new entities to that module?
3770 if (isa<VarTemplateSpecializationDecl>(Val: Previous))
3771 return;
3772 if (isa<ClassTemplateSpecializationDecl>(Val: Previous))
3773 return;
3774 if (auto *Func = dyn_cast<FunctionDecl>(Val: Previous);
3775 Func && Func->getTemplateSpecializationInfo())
3776 return;
3777
3778 // The module ownership of in-class friend declaration is not straightforward.
3779 // Avoid diagnosing such cases.
3780 if (D->getFriendObjectKind() || Previous->getFriendObjectKind())
3781 return;
3782
3783 // Skip diagnosing in-class declarations.
3784 if (!Previous->getLexicalDeclContext()
3785 ->getNonTransparentContext()
3786 ->isFileContext() ||
3787 !D->getLexicalDeclContext()->getNonTransparentContext()->isFileContext())
3788 return;
3789
3790 Module *M = Previous->getOwningModule();
3791 if (!M)
3792 return;
3793
3794 // We only forbids merging decls within named modules.
3795 if (!M->isNamedModule()) {
3796 // Try to warn the case that we merged decls from global module.
3797 if (!M->isGlobalModule())
3798 return;
3799
3800 if (D->getOwningModule() &&
3801 M->getTopLevelModule() == D->getOwningModule()->getTopLevelModule())
3802 return;
3803
3804 Reader.PendingWarningForDuplicatedDefsInModuleUnits.push_back(
3805 Elt: {D, Previous});
3806 return;
3807 }
3808
3809 // It is fine if they are in the same module.
3810 if (Reader.getContext().isInSameModule(M1: M, M2: D->getOwningModule()))
3811 return;
3812
3813 Reader.Diag(Loc: Previous->getLocation(),
3814 DiagID: diag::err_multiple_decl_in_different_modules)
3815 << cast<NamedDecl>(Val: Previous) << M->Name;
3816 Reader.Diag(Loc: D->getLocation(), DiagID: diag::note_also_found);
3817}
3818
3819void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3820 Decl *Previous, Decl *Canon) {
3821 assert(D && Previous);
3822
3823 switch (D->getKind()) {
3824#define ABSTRACT_DECL(TYPE)
3825#define DECL(TYPE, BASE) \
3826 case Decl::TYPE: \
3827 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3828 break;
3829#include "clang/AST/DeclNodes.inc"
3830 }
3831
3832 checkMultipleDefinitionInNamedModules(Reader, D, Previous);
3833
3834 // If the declaration was visible in one module, a redeclaration of it in
3835 // another module remains visible even if it wouldn't be visible by itself.
3836 //
3837 // FIXME: In this case, the declaration should only be visible if a module
3838 // that makes it visible has been imported.
3839 D->IdentifierNamespace |=
3840 Previous->IdentifierNamespace &
3841 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3842
3843 // If the declaration declares a template, it may inherit default arguments
3844 // from the previous declaration.
3845 if (auto *TD = dyn_cast<TemplateDecl>(Val: D))
3846 inheritDefaultTemplateArguments(Context&: Reader.getContext(),
3847 From: cast<TemplateDecl>(Val: Previous), To: TD);
3848
3849 // If any of the declaration in the chain contains an Inheritable attribute,
3850 // it needs to be added to all the declarations in the redeclarable chain.
3851 // FIXME: Only the logic of merging MSInheritableAttr is present, it should
3852 // be extended for all inheritable attributes.
3853 mergeInheritableAttributes(Reader, D, Previous);
3854}
3855
3856template<typename DeclT>
3857void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3858 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3859}
3860
3861void ASTDeclReader::attachLatestDeclImpl(...) {
3862 llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3863}
3864
3865void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3866 assert(D && Latest);
3867
3868 switch (D->getKind()) {
3869#define ABSTRACT_DECL(TYPE)
3870#define DECL(TYPE, BASE) \
3871 case Decl::TYPE: \
3872 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3873 break;
3874#include "clang/AST/DeclNodes.inc"
3875 }
3876}
3877
3878template<typename DeclT>
3879void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3880 D->RedeclLink.markIncomplete();
3881}
3882
3883void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3884 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3885}
3886
3887void ASTReader::markIncompleteDeclChain(Decl *D) {
3888 switch (D->getKind()) {
3889#define ABSTRACT_DECL(TYPE)
3890#define DECL(TYPE, BASE) \
3891 case Decl::TYPE: \
3892 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3893 break;
3894#include "clang/AST/DeclNodes.inc"
3895 }
3896}
3897
3898/// Read the declaration at the given offset from the AST file.
3899Decl *ASTReader::ReadDeclRecord(GlobalDeclID ID) {
3900 SourceLocation DeclLoc;
3901 RecordLocation Loc = DeclCursorForID(ID, Loc&: DeclLoc);
3902 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3903 // Keep track of where we are in the stream, then jump back there
3904 // after reading this declaration.
3905 SavedStreamPosition SavedPosition(DeclsCursor);
3906
3907 ReadingKindTracker ReadingKind(Read_Decl, *this);
3908
3909 // Note that we are loading a declaration record.
3910 Deserializing ADecl(this);
3911
3912 auto Fail = [](const char *what, llvm::Error &&Err) {
3913 llvm::report_fatal_error(reason: Twine("ASTReader::readDeclRecord failed ") + what +
3914 ": " + toString(E: std::move(Err)));
3915 };
3916
3917 if (llvm::Error JumpFailed = DeclsCursor.JumpToBit(BitNo: Loc.Offset))
3918 Fail("jumping", std::move(JumpFailed));
3919 ASTRecordReader Record(*this, *Loc.F);
3920 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3921 Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
3922 if (!MaybeCode)
3923 Fail("reading code", MaybeCode.takeError());
3924 unsigned Code = MaybeCode.get();
3925
3926 ASTContext &Context = getContext();
3927 Decl *D = nullptr;
3928 Expected<unsigned> MaybeDeclCode = Record.readRecord(Cursor&: DeclsCursor, AbbrevID: Code);
3929 if (!MaybeDeclCode)
3930 llvm::report_fatal_error(
3931 reason: Twine("ASTReader::readDeclRecord failed reading decl code: ") +
3932 toString(E: MaybeDeclCode.takeError()));
3933
3934 switch ((DeclCode)MaybeDeclCode.get()) {
3935 case DECL_CONTEXT_LEXICAL:
3936 case DECL_CONTEXT_VISIBLE:
3937 case DECL_CONTEXT_MODULE_LOCAL_VISIBLE:
3938 case DECL_CONTEXT_TU_LOCAL_VISIBLE:
3939 case DECL_SPECIALIZATIONS:
3940 case DECL_PARTIAL_SPECIALIZATIONS:
3941 llvm_unreachable("Record cannot be de-serialized with readDeclRecord");
3942 case DECL_TYPEDEF:
3943 D = TypedefDecl::CreateDeserialized(C&: Context, ID);
3944 break;
3945 case DECL_TYPEALIAS:
3946 D = TypeAliasDecl::CreateDeserialized(C&: Context, ID);
3947 break;
3948 case DECL_ENUM:
3949 D = EnumDecl::CreateDeserialized(C&: Context, ID);
3950 break;
3951 case DECL_RECORD:
3952 D = RecordDecl::CreateDeserialized(C: Context, ID);
3953 break;
3954 case DECL_ENUM_CONSTANT:
3955 D = EnumConstantDecl::CreateDeserialized(C&: Context, ID);
3956 break;
3957 case DECL_FUNCTION:
3958 D = FunctionDecl::CreateDeserialized(C&: Context, ID);
3959 break;
3960 case DECL_LINKAGE_SPEC:
3961 D = LinkageSpecDecl::CreateDeserialized(C&: Context, ID);
3962 break;
3963 case DECL_EXPORT:
3964 D = ExportDecl::CreateDeserialized(C&: Context, ID);
3965 break;
3966 case DECL_LABEL:
3967 D = LabelDecl::CreateDeserialized(C&: Context, ID);
3968 break;
3969 case DECL_NAMESPACE:
3970 D = NamespaceDecl::CreateDeserialized(C&: Context, ID);
3971 break;
3972 case DECL_NAMESPACE_ALIAS:
3973 D = NamespaceAliasDecl::CreateDeserialized(C&: Context, ID);
3974 break;
3975 case DECL_USING:
3976 D = UsingDecl::CreateDeserialized(C&: Context, ID);
3977 break;
3978 case DECL_USING_PACK:
3979 D = UsingPackDecl::CreateDeserialized(C&: Context, ID, NumExpansions: Record.readInt());
3980 break;
3981 case DECL_USING_SHADOW:
3982 D = UsingShadowDecl::CreateDeserialized(C&: Context, ID);
3983 break;
3984 case DECL_USING_ENUM:
3985 D = UsingEnumDecl::CreateDeserialized(C&: Context, ID);
3986 break;
3987 case DECL_CONSTRUCTOR_USING_SHADOW:
3988 D = ConstructorUsingShadowDecl::CreateDeserialized(C&: Context, ID);
3989 break;
3990 case DECL_USING_DIRECTIVE:
3991 D = UsingDirectiveDecl::CreateDeserialized(C&: Context, ID);
3992 break;
3993 case DECL_UNRESOLVED_USING_VALUE:
3994 D = UnresolvedUsingValueDecl::CreateDeserialized(C&: Context, ID);
3995 break;
3996 case DECL_UNRESOLVED_USING_TYPENAME:
3997 D = UnresolvedUsingTypenameDecl::CreateDeserialized(C&: Context, ID);
3998 break;
3999 case DECL_UNRESOLVED_USING_IF_EXISTS:
4000 D = UnresolvedUsingIfExistsDecl::CreateDeserialized(Ctx&: Context, ID);
4001 break;
4002 case DECL_CXX_RECORD:
4003 D = CXXRecordDecl::CreateDeserialized(C: Context, ID);
4004 break;
4005 case DECL_CXX_DEDUCTION_GUIDE:
4006 D = CXXDeductionGuideDecl::CreateDeserialized(C&: Context, ID);
4007 break;
4008 case DECL_CXX_METHOD:
4009 D = CXXMethodDecl::CreateDeserialized(C&: Context, ID);
4010 break;
4011 case DECL_CXX_CONSTRUCTOR:
4012 D = CXXConstructorDecl::CreateDeserialized(C&: Context, ID, AllocKind: Record.readInt());
4013 break;
4014 case DECL_CXX_DESTRUCTOR:
4015 D = CXXDestructorDecl::CreateDeserialized(C&: Context, ID);
4016 break;
4017 case DECL_CXX_CONVERSION:
4018 D = CXXConversionDecl::CreateDeserialized(C&: Context, ID);
4019 break;
4020 case DECL_ACCESS_SPEC:
4021 D = AccessSpecDecl::CreateDeserialized(C&: Context, ID);
4022 break;
4023 case DECL_FRIEND:
4024 D = FriendDecl::CreateDeserialized(C&: Context, ID, FriendTypeNumTPLists: Record.readInt());
4025 break;
4026 case DECL_FRIEND_TEMPLATE:
4027 D = FriendTemplateDecl::CreateDeserialized(C&: Context, ID);
4028 break;
4029 case DECL_CLASS_TEMPLATE:
4030 D = ClassTemplateDecl::CreateDeserialized(C&: Context, ID);
4031 break;
4032 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
4033 D = ClassTemplateSpecializationDecl::CreateDeserialized(C&: Context, ID);
4034 break;
4035 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
4036 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(C&: Context, ID);
4037 break;
4038 case DECL_VAR_TEMPLATE:
4039 D = VarTemplateDecl::CreateDeserialized(C&: Context, ID);
4040 break;
4041 case DECL_VAR_TEMPLATE_SPECIALIZATION:
4042 D = VarTemplateSpecializationDecl::CreateDeserialized(C&: Context, ID);
4043 break;
4044 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
4045 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(C&: Context, ID);
4046 break;
4047 case DECL_FUNCTION_TEMPLATE:
4048 D = FunctionTemplateDecl::CreateDeserialized(C&: Context, ID);
4049 break;
4050 case DECL_TEMPLATE_TYPE_PARM: {
4051 bool HasTypeConstraint = Record.readInt();
4052 D = TemplateTypeParmDecl::CreateDeserialized(C: Context, ID,
4053 HasTypeConstraint);
4054 break;
4055 }
4056 case DECL_NON_TYPE_TEMPLATE_PARM: {
4057 bool HasTypeConstraint = Record.readInt();
4058 D = NonTypeTemplateParmDecl::CreateDeserialized(C&: Context, ID,
4059 HasTypeConstraint);
4060 break;
4061 }
4062 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK: {
4063 bool HasTypeConstraint = Record.readInt();
4064 D = NonTypeTemplateParmDecl::CreateDeserialized(
4065 C&: Context, ID, NumExpandedTypes: Record.readInt(), HasTypeConstraint);
4066 break;
4067 }
4068 case DECL_TEMPLATE_TEMPLATE_PARM:
4069 D = TemplateTemplateParmDecl::CreateDeserialized(C&: Context, ID);
4070 break;
4071 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
4072 D = TemplateTemplateParmDecl::CreateDeserialized(C&: Context, ID,
4073 NumExpansions: Record.readInt());
4074 break;
4075 case DECL_TYPE_ALIAS_TEMPLATE:
4076 D = TypeAliasTemplateDecl::CreateDeserialized(C&: Context, ID);
4077 break;
4078 case DECL_CONCEPT:
4079 D = ConceptDecl::CreateDeserialized(C&: Context, ID);
4080 break;
4081 case DECL_REQUIRES_EXPR_BODY:
4082 D = RequiresExprBodyDecl::CreateDeserialized(C&: Context, ID);
4083 break;
4084 case DECL_STATIC_ASSERT:
4085 D = StaticAssertDecl::CreateDeserialized(C&: Context, ID);
4086 break;
4087 case DECL_OBJC_METHOD:
4088 D = ObjCMethodDecl::CreateDeserialized(C&: Context, ID);
4089 break;
4090 case DECL_OBJC_INTERFACE:
4091 D = ObjCInterfaceDecl::CreateDeserialized(C: Context, ID);
4092 break;
4093 case DECL_OBJC_IVAR:
4094 D = ObjCIvarDecl::CreateDeserialized(C&: Context, ID);
4095 break;
4096 case DECL_OBJC_PROTOCOL:
4097 D = ObjCProtocolDecl::CreateDeserialized(C&: Context, ID);
4098 break;
4099 case DECL_OBJC_AT_DEFS_FIELD:
4100 D = ObjCAtDefsFieldDecl::CreateDeserialized(C&: Context, ID);
4101 break;
4102 case DECL_OBJC_CATEGORY:
4103 D = ObjCCategoryDecl::CreateDeserialized(C&: Context, ID);
4104 break;
4105 case DECL_OBJC_CATEGORY_IMPL:
4106 D = ObjCCategoryImplDecl::CreateDeserialized(C&: Context, ID);
4107 break;
4108 case DECL_OBJC_IMPLEMENTATION:
4109 D = ObjCImplementationDecl::CreateDeserialized(C&: Context, ID);
4110 break;
4111 case DECL_OBJC_COMPATIBLE_ALIAS:
4112 D = ObjCCompatibleAliasDecl::CreateDeserialized(C&: Context, ID);
4113 break;
4114 case DECL_OBJC_PROPERTY:
4115 D = ObjCPropertyDecl::CreateDeserialized(C&: Context, ID);
4116 break;
4117 case DECL_OBJC_PROPERTY_IMPL:
4118 D = ObjCPropertyImplDecl::CreateDeserialized(C&: Context, ID);
4119 break;
4120 case DECL_FIELD:
4121 D = FieldDecl::CreateDeserialized(C&: Context, ID);
4122 break;
4123 case DECL_INDIRECTFIELD:
4124 D = IndirectFieldDecl::CreateDeserialized(C&: Context, ID);
4125 break;
4126 case DECL_VAR:
4127 D = VarDecl::CreateDeserialized(C&: Context, ID);
4128 break;
4129 case DECL_IMPLICIT_PARAM:
4130 D = ImplicitParamDecl::CreateDeserialized(C&: Context, ID);
4131 break;
4132 case DECL_PARM_VAR:
4133 D = ParmVarDecl::CreateDeserialized(C&: Context, ID);
4134 break;
4135 case DECL_DECOMPOSITION:
4136 D = DecompositionDecl::CreateDeserialized(C&: Context, ID, NumBindings: Record.readInt());
4137 break;
4138 case DECL_BINDING:
4139 D = BindingDecl::CreateDeserialized(C&: Context, ID);
4140 break;
4141 case DECL_FILE_SCOPE_ASM:
4142 D = FileScopeAsmDecl::CreateDeserialized(C&: Context, ID);
4143 break;
4144 case DECL_TOP_LEVEL_STMT_DECL:
4145 D = TopLevelStmtDecl::CreateDeserialized(C&: Context, ID);
4146 break;
4147 case DECL_BLOCK:
4148 D = BlockDecl::CreateDeserialized(C&: Context, ID);
4149 break;
4150 case DECL_MS_PROPERTY:
4151 D = MSPropertyDecl::CreateDeserialized(C&: Context, ID);
4152 break;
4153 case DECL_MS_GUID:
4154 D = MSGuidDecl::CreateDeserialized(C&: Context, ID);
4155 break;
4156 case DECL_UNNAMED_GLOBAL_CONSTANT:
4157 D = UnnamedGlobalConstantDecl::CreateDeserialized(C&: Context, ID);
4158 break;
4159 case DECL_TEMPLATE_PARAM_OBJECT:
4160 D = TemplateParamObjectDecl::CreateDeserialized(C&: Context, ID);
4161 break;
4162 case DECL_OUTLINEDFUNCTION:
4163 D = OutlinedFunctionDecl::CreateDeserialized(C&: Context, ID, NumParams: Record.readInt());
4164 break;
4165 case DECL_CAPTURED:
4166 D = CapturedDecl::CreateDeserialized(C&: Context, ID, NumParams: Record.readInt());
4167 break;
4168 case DECL_CXX_BASE_SPECIFIERS:
4169 Error(Msg: "attempt to read a C++ base-specifier record as a declaration");
4170 return nullptr;
4171 case DECL_CXX_CTOR_INITIALIZERS:
4172 Error(Msg: "attempt to read a C++ ctor initializer record as a declaration");
4173 return nullptr;
4174 case DECL_IMPORT:
4175 // Note: last entry of the ImportDecl record is the number of stored source
4176 // locations.
4177 D = ImportDecl::CreateDeserialized(C&: Context, ID, NumLocations: Record.back());
4178 break;
4179 case DECL_OMP_THREADPRIVATE: {
4180 Record.skipInts(N: 1);
4181 unsigned NumChildren = Record.readInt();
4182 Record.skipInts(N: 1);
4183 D = OMPThreadPrivateDecl::CreateDeserialized(C&: Context, ID, N: NumChildren);
4184 break;
4185 }
4186 case DECL_OMP_ALLOCATE: {
4187 unsigned NumClauses = Record.readInt();
4188 unsigned NumVars = Record.readInt();
4189 Record.skipInts(N: 1);
4190 D = OMPAllocateDecl::CreateDeserialized(C&: Context, ID, NVars: NumVars, NClauses: NumClauses);
4191 break;
4192 }
4193 case DECL_OMP_REQUIRES: {
4194 unsigned NumClauses = Record.readInt();
4195 Record.skipInts(N: 2);
4196 D = OMPRequiresDecl::CreateDeserialized(C&: Context, ID, N: NumClauses);
4197 break;
4198 }
4199 case DECL_OMP_DECLARE_REDUCTION:
4200 D = OMPDeclareReductionDecl::CreateDeserialized(C&: Context, ID);
4201 break;
4202 case DECL_OMP_DECLARE_MAPPER: {
4203 unsigned NumClauses = Record.readInt();
4204 Record.skipInts(N: 2);
4205 D = OMPDeclareMapperDecl::CreateDeserialized(C&: Context, ID, N: NumClauses);
4206 break;
4207 }
4208 case DECL_OMP_CAPTUREDEXPR:
4209 D = OMPCapturedExprDecl::CreateDeserialized(C&: Context, ID);
4210 break;
4211 case DECL_PRAGMA_COMMENT:
4212 D = PragmaCommentDecl::CreateDeserialized(C&: Context, ID, ArgSize: Record.readInt());
4213 break;
4214 case DECL_PRAGMA_DETECT_MISMATCH:
4215 D = PragmaDetectMismatchDecl::CreateDeserialized(C&: Context, ID,
4216 NameValueSize: Record.readInt());
4217 break;
4218 case DECL_EMPTY:
4219 D = EmptyDecl::CreateDeserialized(C&: Context, ID);
4220 break;
4221 case DECL_LIFETIME_EXTENDED_TEMPORARY:
4222 D = LifetimeExtendedTemporaryDecl::CreateDeserialized(C&: Context, ID);
4223 break;
4224 case DECL_OBJC_TYPE_PARAM:
4225 D = ObjCTypeParamDecl::CreateDeserialized(ctx&: Context, ID);
4226 break;
4227 case DECL_HLSL_BUFFER:
4228 D = HLSLBufferDecl::CreateDeserialized(C&: Context, ID);
4229 break;
4230 case DECL_IMPLICIT_CONCEPT_SPECIALIZATION:
4231 D = ImplicitConceptSpecializationDecl::CreateDeserialized(C: Context, ID,
4232 NumTemplateArgs: Record.readInt());
4233 break;
4234 case DECL_OPENACC_DECLARE:
4235 D = OpenACCDeclareDecl::CreateDeserialized(Ctx&: Context, ID, NumClauses: Record.readInt());
4236 break;
4237 case DECL_OPENACC_ROUTINE:
4238 D = OpenACCRoutineDecl::CreateDeserialized(Ctx&: Context, ID, NumClauses: Record.readInt());
4239 break;
4240 }
4241
4242 assert(D && "Unknown declaration reading AST file");
4243 LoadedDecl(Index: translateGlobalDeclIDToIndex(ID), D);
4244 // Set the DeclContext before doing any deserialization, to make sure internal
4245 // calls to Decl::getASTContext() by Decl's methods will find the
4246 // TranslationUnitDecl without crashing.
4247 D->setDeclContext(Context.getTranslationUnitDecl());
4248
4249 // Reading some declarations can result in deep recursion.
4250 runWithSufficientStackSpace(Loc: DeclLoc, Fn: [&] { Reader.Visit(D); });
4251
4252 // If this declaration is also a declaration context, get the
4253 // offsets for its tables of lexical and visible declarations.
4254 if (auto *DC = dyn_cast<DeclContext>(Val: D)) {
4255 LookupBlockOffsets Offsets;
4256
4257 Reader.VisitDeclContext(DC, Offsets);
4258
4259 // Get the lexical and visible block for the delayed namespace.
4260 // It is sufficient to judge if ID is in DelayedNamespaceOffsetMap.
4261 // But it may be more efficient to filter the other cases.
4262 if (!Offsets && isa<NamespaceDecl>(Val: D))
4263 if (auto Iter = DelayedNamespaceOffsetMap.find(Val: ID);
4264 Iter != DelayedNamespaceOffsetMap.end())
4265 Offsets = Iter->second;
4266
4267 if (Offsets.VisibleOffset &&
4268 ReadVisibleDeclContextStorage(
4269 M&: *Loc.F, Cursor&: DeclsCursor, Offset: Offsets.VisibleOffset, ID,
4270 VisibleKind: VisibleDeclContextStorageKind::GenerallyVisible))
4271 return nullptr;
4272 if (Offsets.ModuleLocalOffset &&
4273 ReadVisibleDeclContextStorage(
4274 M&: *Loc.F, Cursor&: DeclsCursor, Offset: Offsets.ModuleLocalOffset, ID,
4275 VisibleKind: VisibleDeclContextStorageKind::ModuleLocalVisible))
4276 return nullptr;
4277 if (Offsets.TULocalOffset &&
4278 ReadVisibleDeclContextStorage(
4279 M&: *Loc.F, Cursor&: DeclsCursor, Offset: Offsets.TULocalOffset, ID,
4280 VisibleKind: VisibleDeclContextStorageKind::TULocalVisible))
4281 return nullptr;
4282
4283 if (Offsets.LexicalOffset &&
4284 ReadLexicalDeclContextStorage(M&: *Loc.F, Cursor&: DeclsCursor,
4285 Offset: Offsets.LexicalOffset, DC))
4286 return nullptr;
4287 }
4288 assert(Record.getIdx() == Record.size());
4289
4290 // Load any relevant update records.
4291 PendingUpdateRecords.push_back(
4292 Elt: PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
4293
4294 // Load the categories after recursive loading is finished.
4295 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(Val: D))
4296 // If we already have a definition when deserializing the ObjCInterfaceDecl,
4297 // we put the Decl in PendingDefinitions so we can pull the categories here.
4298 if (Class->isThisDeclarationADefinition() ||
4299 PendingDefinitions.count(Ptr: Class))
4300 loadObjCCategories(ID, D: Class);
4301
4302 // If we have deserialized a declaration that has a definition the
4303 // AST consumer might need to know about, queue it.
4304 // We don't pass it to the consumer immediately because we may be in recursive
4305 // loading, and some declarations may still be initializing.
4306 PotentiallyInterestingDecls.push_back(x: D);
4307
4308 return D;
4309}
4310
4311void ASTReader::PassInterestingDeclsToConsumer() {
4312 assert(Consumer);
4313
4314 if (!CanPassDeclsToConsumer)
4315 return;
4316
4317 // Guard variable to avoid recursively redoing the process of passing
4318 // decls to consumer.
4319 SaveAndRestore GuardPassingDeclsToConsumer(CanPassDeclsToConsumer,
4320 /*NewValue=*/false);
4321
4322 // Ensure that we've loaded all potentially-interesting declarations
4323 // that need to be eagerly loaded.
4324 for (auto ID : EagerlyDeserializedDecls)
4325 GetDecl(ID);
4326 EagerlyDeserializedDecls.clear();
4327
4328 auto ConsumingPotentialInterestingDecls = [this]() {
4329 while (!PotentiallyInterestingDecls.empty()) {
4330 Decl *D = PotentiallyInterestingDecls.front();
4331 PotentiallyInterestingDecls.pop_front();
4332 if (isConsumerInterestedIn(D))
4333 PassInterestingDeclToConsumer(D);
4334 }
4335 };
4336 std::deque<Decl *> MaybeInterestingDecls =
4337 std::move(PotentiallyInterestingDecls);
4338 PotentiallyInterestingDecls.clear();
4339 assert(PotentiallyInterestingDecls.empty());
4340 while (!MaybeInterestingDecls.empty()) {
4341 Decl *D = MaybeInterestingDecls.front();
4342 MaybeInterestingDecls.pop_front();
4343 // Since we load the variable's initializers lazily, it'd be problematic
4344 // if the initializers dependent on each other. So here we try to load the
4345 // initializers of static variables to make sure they are passed to code
4346 // generator by order. If we read anything interesting, we would consume
4347 // that before emitting the current declaration.
4348 if (auto *VD = dyn_cast<VarDecl>(Val: D);
4349 VD && VD->isFileVarDecl() && !VD->isExternallyVisible())
4350 VD->getInit();
4351 ConsumingPotentialInterestingDecls();
4352 if (isConsumerInterestedIn(D))
4353 PassInterestingDeclToConsumer(D);
4354 }
4355
4356 // If we add any new potential interesting decl in the last call, consume it.
4357 ConsumingPotentialInterestingDecls();
4358
4359 for (GlobalDeclID ID : VTablesToEmit) {
4360 auto *RD = cast<CXXRecordDecl>(Val: GetDecl(ID));
4361 assert(!RD->shouldEmitInExternalSource());
4362 PassVTableToConsumer(RD);
4363 }
4364 VTablesToEmit.clear();
4365}
4366
4367void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
4368 // The declaration may have been modified by files later in the chain.
4369 // If this is the case, read the record containing the updates from each file
4370 // and pass it to ASTDeclReader to make the modifications.
4371 GlobalDeclID ID = Record.ID;
4372 Decl *D = Record.D;
4373 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
4374 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(Val: ID);
4375
4376 if (UpdI != DeclUpdateOffsets.end()) {
4377 auto UpdateOffsets = std::move(UpdI->second);
4378 DeclUpdateOffsets.erase(I: UpdI);
4379
4380 // Check if this decl was interesting to the consumer. If we just loaded
4381 // the declaration, then we know it was interesting and we skip the call
4382 // to isConsumerInterestedIn because it is unsafe to call in the
4383 // current ASTReader state.
4384 bool WasInteresting = Record.JustLoaded || isConsumerInterestedIn(D);
4385 for (auto &FileAndOffset : UpdateOffsets) {
4386 ModuleFile *F = FileAndOffset.first;
4387 uint64_t Offset = FileAndOffset.second;
4388 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
4389 SavedStreamPosition SavedPosition(Cursor);
4390 if (llvm::Error JumpFailed = Cursor.JumpToBit(BitNo: Offset))
4391 // FIXME don't do a fatal error.
4392 llvm::report_fatal_error(
4393 reason: Twine("ASTReader::loadDeclUpdateRecords failed jumping: ") +
4394 toString(E: std::move(JumpFailed)));
4395 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4396 if (!MaybeCode)
4397 llvm::report_fatal_error(
4398 reason: Twine("ASTReader::loadDeclUpdateRecords failed reading code: ") +
4399 toString(E: MaybeCode.takeError()));
4400 unsigned Code = MaybeCode.get();
4401 ASTRecordReader Record(*this, *F);
4402 if (Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, AbbrevID: Code))
4403 assert(MaybeRecCode.get() == DECL_UPDATES &&
4404 "Expected DECL_UPDATES record!");
4405 else
4406 llvm::report_fatal_error(
4407 reason: Twine("ASTReader::loadDeclUpdateRecords failed reading rec code: ") +
4408 toString(E: MaybeCode.takeError()));
4409
4410 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4411 SourceLocation());
4412 Reader.UpdateDecl(D);
4413
4414 // We might have made this declaration interesting. If so, remember that
4415 // we need to hand it off to the consumer.
4416 if (!WasInteresting && isConsumerInterestedIn(D)) {
4417 PotentiallyInterestingDecls.push_back(x: D);
4418 WasInteresting = true;
4419 }
4420 }
4421 }
4422
4423 // Load the pending visible updates for this decl context, if it has any.
4424 if (auto I = PendingVisibleUpdates.find(Val: ID);
4425 I != PendingVisibleUpdates.end()) {
4426 auto VisibleUpdates = std::move(I->second);
4427 PendingVisibleUpdates.erase(I);
4428
4429 auto *DC = cast<DeclContext>(Val: D)->getPrimaryContext();
4430 for (const auto &Update : VisibleUpdates)
4431 Lookups[DC].Table.add(
4432 File: Update.Mod, Data: Update.Data,
4433 InfoObj: reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4434 DC->setHasExternalVisibleStorage(true);
4435 }
4436
4437 if (auto I = PendingModuleLocalVisibleUpdates.find(Val: ID);
4438 I != PendingModuleLocalVisibleUpdates.end()) {
4439 auto ModuleLocalVisibleUpdates = std::move(I->second);
4440 PendingModuleLocalVisibleUpdates.erase(I);
4441
4442 auto *DC = cast<DeclContext>(Val: D)->getPrimaryContext();
4443 for (const auto &Update : ModuleLocalVisibleUpdates)
4444 ModuleLocalLookups[DC].Table.add(
4445 File: Update.Mod, Data: Update.Data,
4446 InfoObj: reader::ModuleLocalNameLookupTrait(*this, *Update.Mod));
4447 // NOTE: Can we optimize the case that the data being loaded
4448 // is not related to current module?
4449 DC->setHasExternalVisibleStorage(true);
4450 }
4451
4452 if (auto I = TULocalUpdates.find(Val: ID); I != TULocalUpdates.end()) {
4453 auto Updates = std::move(I->second);
4454 TULocalUpdates.erase(I);
4455
4456 auto *DC = cast<DeclContext>(Val: D)->getPrimaryContext();
4457 for (const auto &Update : Updates)
4458 TULocalLookups[DC].Table.add(
4459 File: Update.Mod, Data: Update.Data,
4460 InfoObj: reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4461 DC->setHasExternalVisibleStorage(true);
4462 }
4463
4464 // Load any pending related decls.
4465 if (D->isCanonicalDecl()) {
4466 if (auto IT = RelatedDeclsMap.find(Val: ID); IT != RelatedDeclsMap.end()) {
4467 for (auto LID : IT->second)
4468 GetDecl(ID: LID);
4469 RelatedDeclsMap.erase(I: IT);
4470 }
4471 }
4472
4473 // Load the pending specializations update for this decl, if it has any.
4474 if (auto I = PendingSpecializationsUpdates.find(Val: ID);
4475 I != PendingSpecializationsUpdates.end()) {
4476 auto SpecializationUpdates = std::move(I->second);
4477 PendingSpecializationsUpdates.erase(I);
4478
4479 for (const auto &Update : SpecializationUpdates)
4480 AddSpecializations(D, Data: Update.Data, M&: *Update.Mod, /*IsPartial=*/false);
4481 }
4482
4483 // Load the pending specializations update for this decl, if it has any.
4484 if (auto I = PendingPartialSpecializationsUpdates.find(Val: ID);
4485 I != PendingPartialSpecializationsUpdates.end()) {
4486 auto SpecializationUpdates = std::move(I->second);
4487 PendingPartialSpecializationsUpdates.erase(I);
4488
4489 for (const auto &Update : SpecializationUpdates)
4490 AddSpecializations(D, Data: Update.Data, M&: *Update.Mod, /*IsPartial=*/true);
4491 }
4492}
4493
4494void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4495 // Attach FirstLocal to the end of the decl chain.
4496 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4497 if (FirstLocal != CanonDecl) {
4498 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(D: CanonDecl);
4499 ASTDeclReader::attachPreviousDecl(
4500 Reader&: *this, D: FirstLocal, Previous: PrevMostRecent ? PrevMostRecent : CanonDecl,
4501 Canon: CanonDecl);
4502 }
4503
4504 if (!LocalOffset) {
4505 ASTDeclReader::attachLatestDecl(D: CanonDecl, Latest: FirstLocal);
4506 return;
4507 }
4508
4509 // Load the list of other redeclarations from this module file.
4510 ModuleFile *M = getOwningModuleFile(D: FirstLocal);
4511 assert(M && "imported decl from no module file");
4512
4513 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4514 SavedStreamPosition SavedPosition(Cursor);
4515 if (llvm::Error JumpFailed = Cursor.JumpToBit(BitNo: LocalOffset))
4516 llvm::report_fatal_error(
4517 reason: Twine("ASTReader::loadPendingDeclChain failed jumping: ") +
4518 toString(E: std::move(JumpFailed)));
4519
4520 RecordData Record;
4521 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4522 if (!MaybeCode)
4523 llvm::report_fatal_error(
4524 reason: Twine("ASTReader::loadPendingDeclChain failed reading code: ") +
4525 toString(E: MaybeCode.takeError()));
4526 unsigned Code = MaybeCode.get();
4527 if (Expected<unsigned> MaybeRecCode = Cursor.readRecord(AbbrevID: Code, Vals&: Record))
4528 assert(MaybeRecCode.get() == LOCAL_REDECLARATIONS &&
4529 "expected LOCAL_REDECLARATIONS record!");
4530 else
4531 llvm::report_fatal_error(
4532 reason: Twine("ASTReader::loadPendingDeclChain failed reading rec code: ") +
4533 toString(E: MaybeCode.takeError()));
4534
4535 // FIXME: We have several different dispatches on decl kind here; maybe
4536 // we should instead generate one loop per kind and dispatch up-front?
4537 Decl *MostRecent = FirstLocal;
4538 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4539 unsigned Idx = N - I - 1;
4540 auto *D = ReadDecl(F&: *M, R: Record, I&: Idx);
4541 ASTDeclReader::attachPreviousDecl(Reader&: *this, D, Previous: MostRecent, Canon: CanonDecl);
4542 MostRecent = D;
4543 }
4544 ASTDeclReader::attachLatestDecl(D: CanonDecl, Latest: MostRecent);
4545}
4546
4547namespace {
4548
4549 /// Given an ObjC interface, goes through the modules and links to the
4550 /// interface all the categories for it.
4551 class ObjCCategoriesVisitor {
4552 ASTReader &Reader;
4553 ObjCInterfaceDecl *Interface;
4554 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4555 ObjCCategoryDecl *Tail = nullptr;
4556 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4557 GlobalDeclID InterfaceID;
4558 unsigned PreviousGeneration;
4559
4560 void add(ObjCCategoryDecl *Cat) {
4561 // Only process each category once.
4562 if (!Deserialized.erase(Ptr: Cat))
4563 return;
4564
4565 // Check for duplicate categories.
4566 if (Cat->getDeclName()) {
4567 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4568 if (Existing && Reader.getOwningModuleFile(D: Existing) !=
4569 Reader.getOwningModuleFile(D: Cat)) {
4570 StructuralEquivalenceContext::NonEquivalentDeclSet NonEquivalentDecls;
4571 StructuralEquivalenceContext Ctx(
4572 Reader.getContext().getLangOpts(), Cat->getASTContext(),
4573 Existing->getASTContext(), NonEquivalentDecls,
4574 StructuralEquivalenceKind::Default,
4575 /*StrictTypeSpelling=*/false,
4576 /*Complain=*/false,
4577 /*ErrorOnTagTypeMismatch=*/true);
4578 if (!Ctx.IsEquivalent(D1: Cat, D2: Existing)) {
4579 // Warn only if the categories with the same name are different.
4580 Reader.Diag(Loc: Cat->getLocation(), DiagID: diag::warn_dup_category_def)
4581 << Interface->getDeclName() << Cat->getDeclName();
4582 Reader.Diag(Loc: Existing->getLocation(),
4583 DiagID: diag::note_previous_definition);
4584 }
4585 } else if (!Existing) {
4586 // Record this category.
4587 Existing = Cat;
4588 }
4589 }
4590
4591 // Add this category to the end of the chain.
4592 if (Tail)
4593 ASTDeclReader::setNextObjCCategory(Cat: Tail, Next: Cat);
4594 else
4595 Interface->setCategoryListRaw(Cat);
4596 Tail = Cat;
4597 }
4598
4599 public:
4600 ObjCCategoriesVisitor(
4601 ASTReader &Reader, ObjCInterfaceDecl *Interface,
4602 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4603 GlobalDeclID InterfaceID, unsigned PreviousGeneration)
4604 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4605 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4606 // Populate the name -> category map with the set of known categories.
4607 for (auto *Cat : Interface->known_categories()) {
4608 if (Cat->getDeclName())
4609 NameCategoryMap[Cat->getDeclName()] = Cat;
4610
4611 // Keep track of the tail of the category list.
4612 Tail = Cat;
4613 }
4614 }
4615
4616 bool operator()(ModuleFile &M) {
4617 // If we've loaded all of the category information we care about from
4618 // this module file, we're done.
4619 if (M.Generation <= PreviousGeneration)
4620 return true;
4621
4622 // Map global ID of the definition down to the local ID used in this
4623 // module file. If there is no such mapping, we'll find nothing here
4624 // (or in any module it imports).
4625 LocalDeclID LocalID =
4626 Reader.mapGlobalIDToModuleFileGlobalID(M, GlobalID: InterfaceID);
4627 if (LocalID.isInvalid())
4628 return true;
4629
4630 // Perform a binary search to find the local redeclarations for this
4631 // declaration (if any).
4632 const ObjCCategoriesInfo Compare = {LocalID, 0};
4633 const ObjCCategoriesInfo *Result = std::lower_bound(
4634 first: M.ObjCCategoriesMap,
4635 last: M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap, val: Compare);
4636 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4637 LocalID != Result->getDefinitionID()) {
4638 // We didn't find anything. If the class definition is in this module
4639 // file, then the module files it depends on cannot have any categories,
4640 // so suppress further lookup.
4641 return Reader.isDeclIDFromModule(ID: InterfaceID, M);
4642 }
4643
4644 // We found something. Dig out all of the categories.
4645 unsigned Offset = Result->Offset;
4646 unsigned N = M.ObjCCategories[Offset];
4647 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4648 for (unsigned I = 0; I != N; ++I)
4649 add(Cat: Reader.ReadDeclAs<ObjCCategoryDecl>(F&: M, R: M.ObjCCategories, I&: Offset));
4650 return true;
4651 }
4652 };
4653
4654} // namespace
4655
4656void ASTReader::loadObjCCategories(GlobalDeclID ID, ObjCInterfaceDecl *D,
4657 unsigned PreviousGeneration) {
4658 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4659 PreviousGeneration);
4660 ModuleMgr.visit(Visitor);
4661}
4662
4663template<typename DeclT, typename Fn>
4664static void forAllLaterRedecls(DeclT *D, Fn F) {
4665 F(D);
4666
4667 // Check whether we've already merged D into its redeclaration chain.
4668 // MostRecent may or may not be nullptr if D has not been merged. If
4669 // not, walk the merged redecl chain and see if it's there.
4670 auto *MostRecent = D->getMostRecentDecl();
4671 bool Found = false;
4672 for (auto *Redecl = MostRecent; Redecl && !Found;
4673 Redecl = Redecl->getPreviousDecl())
4674 Found = (Redecl == D);
4675
4676 // If this declaration is merged, apply the functor to all later decls.
4677 if (Found) {
4678 for (auto *Redecl = MostRecent; Redecl != D;
4679 Redecl = Redecl->getPreviousDecl())
4680 F(Redecl);
4681 }
4682}
4683
4684void ASTDeclReader::UpdateDecl(Decl *D) {
4685 while (Record.getIdx() < Record.size()) {
4686 switch ((DeclUpdateKind)Record.readInt()) {
4687 case DeclUpdateKind::CXXAddedImplicitMember: {
4688 auto *RD = cast<CXXRecordDecl>(Val: D);
4689 Decl *MD = Record.readDecl();
4690 assert(MD && "couldn't read decl from update record");
4691 Reader.PendingAddedClassMembers.push_back(Elt: {RD, MD});
4692 break;
4693 }
4694
4695 case DeclUpdateKind::CXXAddedAnonymousNamespace: {
4696 auto *Anon = readDeclAs<NamespaceDecl>();
4697
4698 // Each module has its own anonymous namespace, which is disjoint from
4699 // any other module's anonymous namespaces, so don't attach the anonymous
4700 // namespace at all.
4701 if (!Record.isModule()) {
4702 if (auto *TU = dyn_cast<TranslationUnitDecl>(Val: D))
4703 TU->setAnonymousNamespace(Anon);
4704 else
4705 cast<NamespaceDecl>(Val: D)->setAnonymousNamespace(Anon);
4706 }
4707 break;
4708 }
4709
4710 case DeclUpdateKind::CXXAddedVarDefinition: {
4711 auto *VD = cast<VarDecl>(Val: D);
4712 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4713 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4714 ReadVarDeclInit(VD);
4715 break;
4716 }
4717
4718 case DeclUpdateKind::CXXPointOfInstantiation: {
4719 SourceLocation POI = Record.readSourceLocation();
4720 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(Val: D)) {
4721 VTSD->setPointOfInstantiation(POI);
4722 } else if (auto *VD = dyn_cast<VarDecl>(Val: D)) {
4723 MemberSpecializationInfo *MSInfo = VD->getMemberSpecializationInfo();
4724 assert(MSInfo && "No member specialization information");
4725 MSInfo->setPointOfInstantiation(POI);
4726 } else {
4727 auto *FD = cast<FunctionDecl>(Val: D);
4728 if (auto *FTSInfo = dyn_cast<FunctionTemplateSpecializationInfo *>(
4729 Val&: FD->TemplateOrSpecialization))
4730 FTSInfo->setPointOfInstantiation(POI);
4731 else
4732 cast<MemberSpecializationInfo *>(Val&: FD->TemplateOrSpecialization)
4733 ->setPointOfInstantiation(POI);
4734 }
4735 break;
4736 }
4737
4738 case DeclUpdateKind::CXXInstantiatedDefaultArgument: {
4739 auto *Param = cast<ParmVarDecl>(Val: D);
4740
4741 // We have to read the default argument regardless of whether we use it
4742 // so that hypothetical further update records aren't messed up.
4743 // TODO: Add a function to skip over the next expr record.
4744 auto *DefaultArg = Record.readExpr();
4745
4746 // Only apply the update if the parameter still has an uninstantiated
4747 // default argument.
4748 if (Param->hasUninstantiatedDefaultArg())
4749 Param->setDefaultArg(DefaultArg);
4750 break;
4751 }
4752
4753 case DeclUpdateKind::CXXInstantiatedDefaultMemberInitializer: {
4754 auto *FD = cast<FieldDecl>(Val: D);
4755 auto *DefaultInit = Record.readExpr();
4756
4757 // Only apply the update if the field still has an uninstantiated
4758 // default member initializer.
4759 if (FD->hasInClassInitializer() && !FD->hasNonNullInClassInitializer()) {
4760 if (DefaultInit)
4761 FD->setInClassInitializer(DefaultInit);
4762 else
4763 // Instantiation failed. We can get here if we serialized an AST for
4764 // an invalid program.
4765 FD->removeInClassInitializer();
4766 }
4767 break;
4768 }
4769
4770 case DeclUpdateKind::CXXAddedFunctionDefinition: {
4771 auto *FD = cast<FunctionDecl>(Val: D);
4772 if (Reader.PendingBodies[FD]) {
4773 // FIXME: Maybe check for ODR violations.
4774 // It's safe to stop now because this update record is always last.
4775 return;
4776 }
4777
4778 if (Record.readInt()) {
4779 // Maintain AST consistency: any later redeclarations of this function
4780 // are inline if this one is. (We might have merged another declaration
4781 // into this one.)
4782 forAllLaterRedecls(D: FD, F: [](FunctionDecl *FD) {
4783 FD->setImplicitlyInline();
4784 });
4785 }
4786 FD->setInnerLocStart(readSourceLocation());
4787 ReadFunctionDefinition(FD);
4788 assert(Record.getIdx() == Record.size() && "lazy body must be last");
4789 break;
4790 }
4791
4792 case DeclUpdateKind::CXXInstantiatedClassDefinition: {
4793 auto *RD = cast<CXXRecordDecl>(Val: D);
4794 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4795 bool HadRealDefinition =
4796 OldDD && (OldDD->Definition != RD ||
4797 !Reader.PendingFakeDefinitionData.count(Val: OldDD));
4798 RD->setParamDestroyedInCallee(Record.readInt());
4799 RD->setArgPassingRestrictions(
4800 static_cast<RecordArgPassingKind>(Record.readInt()));
4801 ReadCXXRecordDefinition(D: RD, /*Update*/true);
4802
4803 // Visible update is handled separately.
4804 uint64_t LexicalOffset = ReadLocalOffset();
4805 if (!HadRealDefinition && LexicalOffset) {
4806 Record.readLexicalDeclContextStorage(Offset: LexicalOffset, DC: RD);
4807 Reader.PendingFakeDefinitionData.erase(Val: OldDD);
4808 }
4809
4810 auto TSK = (TemplateSpecializationKind)Record.readInt();
4811 SourceLocation POI = readSourceLocation();
4812 if (MemberSpecializationInfo *MSInfo =
4813 RD->getMemberSpecializationInfo()) {
4814 MSInfo->setTemplateSpecializationKind(TSK);
4815 MSInfo->setPointOfInstantiation(POI);
4816 } else {
4817 auto *Spec = cast<ClassTemplateSpecializationDecl>(Val: RD);
4818 Spec->setTemplateSpecializationKind(TSK);
4819 Spec->setPointOfInstantiation(POI);
4820
4821 if (Record.readInt()) {
4822 auto *PartialSpec =
4823 readDeclAs<ClassTemplatePartialSpecializationDecl>();
4824 SmallVector<TemplateArgument, 8> TemplArgs;
4825 Record.readTemplateArgumentList(TemplArgs);
4826 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4827 Context&: Reader.getContext(), Args: TemplArgs);
4828
4829 // FIXME: If we already have a partial specialization set,
4830 // check that it matches.
4831 if (!isa<ClassTemplatePartialSpecializationDecl *>(
4832 Val: Spec->getSpecializedTemplateOrPartial()))
4833 Spec->setInstantiationOf(PartialSpec, TemplateArgs: TemplArgList);
4834 }
4835 }
4836
4837 RD->setTagKind(static_cast<TagTypeKind>(Record.readInt()));
4838 RD->setLocation(readSourceLocation());
4839 RD->setLocStart(readSourceLocation());
4840 RD->setBraceRange(readSourceRange());
4841
4842 if (Record.readInt()) {
4843 AttrVec Attrs;
4844 Record.readAttributes(Attrs);
4845 // If the declaration already has attributes, we assume that some other
4846 // AST file already loaded them.
4847 if (!D->hasAttrs())
4848 D->setAttrsImpl(Attrs, Ctx&: Reader.getContext());
4849 }
4850 break;
4851 }
4852
4853 case DeclUpdateKind::CXXResolvedDtorDelete: {
4854 // Set the 'operator delete' directly to avoid emitting another update
4855 // record.
4856 CXXDestructorDecl *Canon = cast<CXXDestructorDecl>(Val: D->getCanonicalDecl());
4857 ASTContext &C = Reader.getContext();
4858 auto *Del = readDeclAs<FunctionDecl>();
4859 auto *ThisArg = Record.readExpr();
4860 auto *Dtor = cast<CXXDestructorDecl>(Val: D);
4861 // FIXME: Check consistency if we have an old and new operator delete.
4862 if (!C.dtorHasOperatorDelete(Dtor,
4863 K: ASTContext::OperatorDeleteKind::Regular)) {
4864 C.addOperatorDeleteForVDtor(Dtor, OperatorDelete: Del,
4865 K: ASTContext::OperatorDeleteKind::Regular);
4866 Canon->OperatorDeleteThisArg = ThisArg;
4867 }
4868 break;
4869 }
4870
4871 case DeclUpdateKind::CXXResolvedDtorGlobDelete: {
4872 auto *Del = readDeclAs<FunctionDecl>();
4873 auto *Dtor = cast<CXXDestructorDecl>(Val: D);
4874 ASTContext &C = Reader.getContext();
4875 if (!C.dtorHasOperatorDelete(
4876 Dtor, K: ASTContext::OperatorDeleteKind::GlobalRegular))
4877 C.addOperatorDeleteForVDtor(
4878 Dtor, OperatorDelete: Del, K: ASTContext::OperatorDeleteKind::GlobalRegular);
4879 break;
4880 }
4881 case DeclUpdateKind::CXXResolvedDtorArrayDelete: {
4882 auto *Del = readDeclAs<FunctionDecl>();
4883 auto *Dtor = cast<CXXDestructorDecl>(Val: D);
4884 ASTContext &C = Reader.getContext();
4885 if (!C.dtorHasOperatorDelete(Dtor, K: ASTContext::OperatorDeleteKind::Array))
4886 C.addOperatorDeleteForVDtor(Dtor, OperatorDelete: Del,
4887 K: ASTContext::OperatorDeleteKind::Array);
4888 break;
4889 }
4890 case DeclUpdateKind::CXXResolvedDtorGlobArrayDelete: {
4891 auto *Del = readDeclAs<FunctionDecl>();
4892 auto *Dtor = cast<CXXDestructorDecl>(Val: D);
4893 ASTContext &C = Reader.getContext();
4894 if (!C.dtorHasOperatorDelete(Dtor,
4895 K: ASTContext::OperatorDeleteKind::ArrayGlobal))
4896 C.addOperatorDeleteForVDtor(
4897 Dtor, OperatorDelete: Del, K: ASTContext::OperatorDeleteKind::ArrayGlobal);
4898 break;
4899 }
4900
4901 case DeclUpdateKind::CXXResolvedExceptionSpec: {
4902 SmallVector<QualType, 8> ExceptionStorage;
4903 auto ESI = Record.readExceptionSpecInfo(buffer&: ExceptionStorage);
4904
4905 // Update this declaration's exception specification, if needed.
4906 auto *FD = cast<FunctionDecl>(Val: D);
4907 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4908 // FIXME: If the exception specification is already present, check that it
4909 // matches.
4910 if (isUnresolvedExceptionSpec(ESpecType: FPT->getExceptionSpecType())) {
4911 FD->setType(Reader.getContext().getFunctionType(
4912 ResultTy: FPT->getReturnType(), Args: FPT->getParamTypes(),
4913 EPI: FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4914
4915 // When we get to the end of deserializing, see if there are other decls
4916 // that we need to propagate this exception specification onto.
4917 Reader.PendingExceptionSpecUpdates.insert(
4918 KV: std::make_pair(x: FD->getCanonicalDecl(), y&: FD));
4919 }
4920 break;
4921 }
4922
4923 case DeclUpdateKind::CXXDeducedReturnType: {
4924 auto *FD = cast<FunctionDecl>(Val: D);
4925 QualType DeducedResultType = Record.readType();
4926 Reader.PendingDeducedTypeUpdates.insert(
4927 KV: {FD->getCanonicalDecl(), DeducedResultType});
4928 break;
4929 }
4930
4931 case DeclUpdateKind::DeclMarkedUsed:
4932 // Maintain AST consistency: any later redeclarations are used too.
4933 D->markUsed(C&: Reader.getContext());
4934 break;
4935
4936 case DeclUpdateKind::ManglingNumber:
4937 Reader.getContext().setManglingNumber(ND: cast<NamedDecl>(Val: D),
4938 Number: Record.readInt());
4939 break;
4940
4941 case DeclUpdateKind::StaticLocalNumber:
4942 Reader.getContext().setStaticLocalNumber(VD: cast<VarDecl>(Val: D),
4943 Number: Record.readInt());
4944 break;
4945
4946 case DeclUpdateKind::DeclMarkedOpenMPThreadPrivate:
4947 D->addAttr(A: OMPThreadPrivateDeclAttr::CreateImplicit(Ctx&: Reader.getContext(),
4948 Range: readSourceRange()));
4949 break;
4950
4951 case DeclUpdateKind::DeclMarkedOpenMPAllocate: {
4952 auto AllocatorKind =
4953 static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
4954 Expr *Allocator = Record.readExpr();
4955 Expr *Alignment = Record.readExpr();
4956 SourceRange SR = readSourceRange();
4957 D->addAttr(A: OMPAllocateDeclAttr::CreateImplicit(
4958 Ctx&: Reader.getContext(), AllocatorType: AllocatorKind, Allocator, Alignment, Range: SR));
4959 break;
4960 }
4961
4962 case DeclUpdateKind::DeclExported: {
4963 unsigned SubmoduleID = readSubmoduleID();
4964 auto *Exported = cast<NamedDecl>(Val: D);
4965 Module *Owner = SubmoduleID ? Reader.getSubmodule(GlobalID: SubmoduleID) : nullptr;
4966 Reader.getContext().mergeDefinitionIntoModule(ND: Exported, M: Owner);
4967 Reader.PendingMergedDefinitionsToDeduplicate.insert(X: Exported);
4968 break;
4969 }
4970
4971 case DeclUpdateKind::DeclMarkedOpenMPDeclareTarget: {
4972 auto MapType = Record.readEnum<OMPDeclareTargetDeclAttr::MapTypeTy>();
4973 auto DevType = Record.readEnum<OMPDeclareTargetDeclAttr::DevTypeTy>();
4974 Expr *IndirectE = Record.readExpr();
4975 bool Indirect = Record.readBool();
4976 unsigned Level = Record.readInt();
4977 D->addAttr(A: OMPDeclareTargetDeclAttr::CreateImplicit(
4978 Ctx&: Reader.getContext(), MapType, DevType, IndirectExpr: IndirectE, Indirect, Level,
4979 Range: readSourceRange()));
4980 break;
4981 }
4982
4983 case DeclUpdateKind::AddedAttrToRecord:
4984 AttrVec Attrs;
4985 Record.readAttributes(Attrs);
4986 assert(Attrs.size() == 1);
4987 D->addAttr(A: Attrs[0]);
4988 break;
4989 }
4990 }
4991}
4992