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 VisitExplicitInstantiationDecl(ExplicitInstantiationDecl *D);
409 void VisitBlockDecl(BlockDecl *BD);
410 void VisitOutlinedFunctionDecl(OutlinedFunctionDecl *D);
411 void VisitCapturedDecl(CapturedDecl *CD);
412 void VisitEmptyDecl(EmptyDecl *D);
413 void VisitLifetimeExtendedTemporaryDecl(LifetimeExtendedTemporaryDecl *D);
414
415 void VisitOpenACCDeclareDecl(OpenACCDeclareDecl *D);
416 void VisitOpenACCRoutineDecl(OpenACCRoutineDecl *D);
417
418 void VisitDeclContext(DeclContext *DC, LookupBlockOffsets &Offsets);
419
420 template <typename T>
421 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
422
423 template <typename T>
424 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl);
425
426 void mergeRedeclarableTemplate(RedeclarableTemplateDecl *D,
427 RedeclarableResult &Redecl);
428
429 template <typename T> void mergeMergeable(Mergeable<T> *D);
430
431 void mergeMergeable(LifetimeExtendedTemporaryDecl *D);
432
433 ObjCTypeParamList *ReadObjCTypeParamList();
434
435 // FIXME: Reorder according to DeclNodes.td?
436 void VisitObjCMethodDecl(ObjCMethodDecl *D);
437 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
438 void VisitObjCContainerDecl(ObjCContainerDecl *D);
439 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
440 void VisitObjCIvarDecl(ObjCIvarDecl *D);
441 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
442 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
443 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
444 void VisitObjCImplDecl(ObjCImplDecl *D);
445 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
446 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
447 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
448 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
449 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
450 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
451 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
452 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
453 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
454 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
455 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
456};
457} // namespace clang
458
459namespace {
460
461/// Iterator over the redeclarations of a declaration that have already
462/// been merged into the same redeclaration chain.
463template <typename DeclT> class MergedRedeclIterator {
464 DeclT *Start = nullptr;
465 DeclT *Canonical = nullptr;
466 DeclT *Current = nullptr;
467
468public:
469 MergedRedeclIterator() = default;
470 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
471
472 DeclT *operator*() { return Current; }
473
474 MergedRedeclIterator &operator++() {
475 if (Current->isFirstDecl()) {
476 Canonical = Current;
477 Current = Current->getMostRecentDecl();
478 } else
479 Current = Current->getPreviousDecl();
480
481 // If we started in the merged portion, we'll reach our start position
482 // eventually. Otherwise, we'll never reach it, but the second declaration
483 // we reached was the canonical declaration, so stop when we see that one
484 // again.
485 if (Current == Start || Current == Canonical)
486 Current = nullptr;
487 return *this;
488 }
489
490 friend bool operator!=(const MergedRedeclIterator &A,
491 const MergedRedeclIterator &B) {
492 return A.Current != B.Current;
493 }
494};
495
496} // namespace
497
498template <typename DeclT>
499static llvm::iterator_range<MergedRedeclIterator<DeclT>>
500merged_redecls(DeclT *D) {
501 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
502 MergedRedeclIterator<DeclT>());
503}
504
505uint64_t ASTDeclReader::GetCurrentCursorOffset() {
506 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
507}
508
509void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
510 if (Record.readInt()) {
511 Reader.DefinitionSource[FD] =
512 Loc.F->Kind == ModuleKind::MK_MainFile ||
513 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
514 }
515 if (auto *CD = dyn_cast<CXXConstructorDecl>(Val: FD)) {
516 CD->setNumCtorInitializers(Record.readInt());
517 if (CD->getNumCtorInitializers())
518 CD->CtorInitializers = ReadGlobalOffset();
519 }
520 // Store the offset of the body so we can lazily load it later.
521 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
522 // For now remember ThisDeclarationWasADefinition only for friend functions.
523 if (FD->getFriendObjectKind())
524 Reader.ThisDeclarationWasADefinitionSet.insert(V: FD);
525}
526
527void ASTDeclReader::Visit(Decl *D) {
528 DeclVisitor<ASTDeclReader, void>::Visit(D);
529
530 // At this point we have deserialized and merged the decl and it is safe to
531 // update its canonical decl to signal that the entire entity is used.
532 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
533 IsDeclMarkedUsed = false;
534
535 if (auto *DD = dyn_cast<DeclaratorDecl>(Val: D)) {
536 if (auto *TInfo = DD->getTypeSourceInfo())
537 Record.readTypeLoc(TL: TInfo->getTypeLoc());
538 }
539
540 if (auto *TD = dyn_cast<TypeDecl>(Val: D)) {
541 // We have a fully initialized TypeDecl. Read its type now.
542 if (isa<TagDecl, TypedefDecl, TypeAliasDecl>(Val: TD))
543 assert(DeferredTypeID == 0 &&
544 "Deferred type not used for TagDecls and Typedefs");
545 else
546 TD->setTypeForDecl(Reader.GetType(ID: DeferredTypeID).getTypePtrOrNull());
547
548 // If this is a tag declaration with a typedef name for linkage, it's safe
549 // to load that typedef now.
550 if (NamedDeclForTagDecl.isValid())
551 cast<TagDecl>(Val: D)->TypedefNameDeclOrQualifier =
552 cast<TypedefNameDecl>(Val: Reader.GetDecl(ID: NamedDeclForTagDecl));
553 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(Val: D)) {
554 // if we have a fully initialized TypeDecl, we can safely read its type now.
555 ID->TypeForDecl = Reader.GetType(ID: DeferredTypeID).getTypePtrOrNull();
556 } else if (auto *FD = dyn_cast<FunctionDecl>(Val: D)) {
557 // FunctionDecl's body was written last after all other Stmts/Exprs.
558 if (Record.readInt())
559 ReadFunctionDefinition(FD);
560 } else if (auto *VD = dyn_cast<VarDecl>(Val: D)) {
561 ReadVarDeclInit(VD);
562 } else if (auto *FD = dyn_cast<FieldDecl>(Val: D)) {
563 if (FD->hasInClassInitializer() && Record.readInt()) {
564 FD->setLazyInClassInitializer(LazyDeclStmtPtr(GetCurrentCursorOffset()));
565 }
566 }
567}
568
569void ASTDeclReader::VisitDecl(Decl *D) {
570 BitsUnpacker DeclBits(Record.readInt());
571 auto ModuleOwnership =
572 (Decl::ModuleOwnershipKind)DeclBits.getNextBits(/*Width=*/3);
573 D->setReferenced(DeclBits.getNextBit());
574 D->Used = DeclBits.getNextBit();
575 IsDeclMarkedUsed |= D->Used;
576 D->setAccess((AccessSpecifier)DeclBits.getNextBits(/*Width=*/2));
577 D->setImplicit(DeclBits.getNextBit());
578 bool HasStandaloneLexicalDC = DeclBits.getNextBit();
579 bool HasAttrs = DeclBits.getNextBit();
580 D->setTopLevelDeclInObjCContainer(DeclBits.getNextBit());
581 D->InvalidDecl = DeclBits.getNextBit();
582 D->FromASTFile = true;
583
584 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
585 isa<ParmVarDecl, ObjCTypeParamDecl>(Val: D)) {
586 // We don't want to deserialize the DeclContext of a template
587 // parameter or of a parameter of a function template immediately. These
588 // entities might be used in the formulation of its DeclContext (for
589 // example, a function parameter can be used in decltype() in trailing
590 // return type of the function). Use the translation unit DeclContext as a
591 // placeholder.
592 GlobalDeclID SemaDCIDForTemplateParmDecl = readDeclID();
593 GlobalDeclID LexicalDCIDForTemplateParmDecl =
594 HasStandaloneLexicalDC ? readDeclID() : GlobalDeclID();
595 if (LexicalDCIDForTemplateParmDecl.isInvalid())
596 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
597 Reader.addPendingDeclContextInfo(D,
598 SemaDC: SemaDCIDForTemplateParmDecl,
599 LexicalDC: LexicalDCIDForTemplateParmDecl);
600 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
601 } else {
602 auto *SemaDC = readDeclAs<DeclContext>();
603 auto *LexicalDC =
604 HasStandaloneLexicalDC ? readDeclAs<DeclContext>() : nullptr;
605 if (!LexicalDC)
606 LexicalDC = SemaDC;
607 // If the context is a class, we might not have actually merged it yet, in
608 // the case where the definition comes from an update record.
609 DeclContext *MergedSemaDC;
610 if (auto *RD = dyn_cast<CXXRecordDecl>(Val: SemaDC))
611 MergedSemaDC = getOrFakePrimaryClassDefinition(Reader, RD);
612 else
613 MergedSemaDC = Reader.MergedDeclContexts.lookup(Val: SemaDC);
614 // Avoid calling setLexicalDeclContext() directly because it uses
615 // Decl::getASTContext() internally which is unsafe during derialization.
616 D->setDeclContextsImpl(SemaDC: MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
617 Ctx&: Reader.getContext());
618 }
619 D->setLocation(ThisDeclLoc);
620
621 if (HasAttrs) {
622 AttrVec Attrs;
623 Record.readAttributes(Attrs);
624 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
625 // internally which is unsafe during derialization.
626 D->setAttrsImpl(Attrs, Ctx&: Reader.getContext());
627 }
628
629 // Determine whether this declaration is part of a (sub)module. If so, it
630 // may not yet be visible.
631 bool ModulePrivate =
632 (ModuleOwnership == Decl::ModuleOwnershipKind::ModulePrivate);
633 if (unsigned SubmoduleID = readSubmoduleID()) {
634 switch (ModuleOwnership) {
635 case Decl::ModuleOwnershipKind::Visible:
636 ModuleOwnership = Decl::ModuleOwnershipKind::VisibleWhenImported;
637 break;
638 case Decl::ModuleOwnershipKind::Unowned:
639 case Decl::ModuleOwnershipKind::VisibleWhenImported:
640 case Decl::ModuleOwnershipKind::VisiblePromoted:
641 case Decl::ModuleOwnershipKind::ReachableWhenImported:
642 case Decl::ModuleOwnershipKind::ModulePrivate:
643 break;
644 }
645
646 D->setModuleOwnershipKind(ModuleOwnership);
647 // Store the owning submodule ID in the declaration.
648 D->setOwningModuleID(SubmoduleID);
649
650 if (ModulePrivate) {
651 // Module-private declarations are never visible, so there is no work to
652 // do.
653 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
654 // If local visibility is being tracked, this declaration will become
655 // hidden and visible as the owning module does.
656 } else if (Module *Owner = Reader.getSubmodule(GlobalID: SubmoduleID)) {
657 // Mark the declaration as visible when its owning module becomes visible.
658 if (Owner->NameVisibility == Module::AllVisible)
659 D->setVisibleDespiteOwningModule();
660 else
661 Reader.HiddenNamesMap[Owner].push_back(Elt: D);
662 }
663 } else if (ModulePrivate) {
664 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
665 }
666}
667
668void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
669 VisitDecl(D);
670 D->setLocation(readSourceLocation());
671 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
672 std::string Arg = readString();
673 memcpy(dest: D->getTrailingObjects(), src: Arg.data(), n: Arg.size());
674 D->getTrailingObjects()[Arg.size()] = '\0';
675}
676
677void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
678 VisitDecl(D);
679 D->setLocation(readSourceLocation());
680 std::string Name = readString();
681 memcpy(dest: D->getTrailingObjects(), src: Name.data(), n: Name.size());
682 D->getTrailingObjects()[Name.size()] = '\0';
683
684 D->ValueStart = Name.size() + 1;
685 std::string Value = readString();
686 memcpy(dest: D->getTrailingObjects() + D->ValueStart, src: Value.data(), n: Value.size());
687 D->getTrailingObjects()[D->ValueStart + Value.size()] = '\0';
688}
689
690void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
691 llvm_unreachable("Translation units are not serialized");
692}
693
694void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
695 VisitDecl(D: ND);
696 ND->setDeclName(Record.readDeclarationName());
697 AnonymousDeclNumber = Record.readInt();
698}
699
700void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
701 VisitNamedDecl(ND: TD);
702 TD->setLocStart(readSourceLocation());
703 // Delay type reading until after we have fully initialized the decl.
704 if (!isa<TagDecl, TypedefDecl, TypeAliasDecl>(Val: TD))
705 DeferredTypeID = Record.getGlobalTypeID(LocalID: Record.readInt());
706}
707
708RedeclarableResult ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
709 RedeclarableResult Redecl = VisitRedeclarable(D: TD);
710 VisitTypeDecl(TD);
711 TypeSourceInfo *TInfo = readTypeSourceInfo();
712 if (Record.readInt()) { // isModed
713 QualType modedT = Record.readType();
714 TD->setModedTypeSourceInfo(unmodedTSI: TInfo, modedTy: modedT);
715 } else
716 TD->setTypeSourceInfo(TInfo);
717 // Read and discard the declaration for which this is a typedef name for
718 // linkage, if it exists. We cannot rely on our type to pull in this decl,
719 // because it might have been merged with a type from another module and
720 // thus might not refer to our version of the declaration.
721 readDecl();
722 return Redecl;
723}
724
725void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
726 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
727 mergeRedeclarable(DBase: TD, Redecl);
728}
729
730void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
731 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
732 if (auto *Template = readDeclAs<TypeAliasTemplateDecl>())
733 // Merged when we merge the template.
734 TD->setDescribedAliasTemplate(Template);
735 else
736 mergeRedeclarable(DBase: TD, Redecl);
737}
738
739RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
740 RedeclarableResult Redecl = VisitRedeclarable(D: TD);
741 VisitTypeDecl(TD);
742
743 TD->IdentifierNamespace = Record.readInt();
744
745 BitsUnpacker TagDeclBits(Record.readInt());
746 TD->setTagKind(
747 static_cast<TagTypeKind>(TagDeclBits.getNextBits(/*Width=*/3)));
748 TD->setCompleteDefinition(TagDeclBits.getNextBit());
749 TD->setEmbeddedInDeclarator(TagDeclBits.getNextBit());
750 TD->setFreeStanding(TagDeclBits.getNextBit());
751 TD->setCompleteDefinitionRequired(TagDeclBits.getNextBit());
752 TD->setBraceRange(readSourceRange());
753
754 switch (TagDeclBits.getNextBits(/*Width=*/2)) {
755 case 0:
756 break;
757 case 1: { // ExtInfo
758 auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
759 Record.readQualifierInfo(Info&: *Info);
760 TD->TypedefNameDeclOrQualifier = Info;
761 break;
762 }
763 case 2: // TypedefNameForAnonDecl
764 NamedDeclForTagDecl = readDeclID();
765 TypedefNameForLinkage = Record.readIdentifier();
766 break;
767 default:
768 llvm_unreachable("unexpected tag info kind");
769 }
770
771 if (!isa<CXXRecordDecl>(Val: TD))
772 mergeRedeclarable(DBase: TD, Redecl);
773 return Redecl;
774}
775
776void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
777 VisitTagDecl(TD: ED);
778 if (TypeSourceInfo *TI = readTypeSourceInfo())
779 ED->setIntegerTypeSourceInfo(TI);
780 else
781 ED->setIntegerType(Record.readType());
782 ED->setPromotionType(Record.readType());
783
784 BitsUnpacker EnumDeclBits(Record.readInt());
785 ED->setNumPositiveBits(EnumDeclBits.getNextBits(/*Width=*/8));
786 ED->setNumNegativeBits(EnumDeclBits.getNextBits(/*Width=*/8));
787 ED->setScoped(EnumDeclBits.getNextBit());
788 ED->setScopedUsingClassTag(EnumDeclBits.getNextBit());
789 ED->setFixed(EnumDeclBits.getNextBit());
790
791 ED->setHasODRHash(true);
792 ED->ODRHash = Record.readInt();
793
794 // If this is a definition subject to the ODR, and we already have a
795 // definition, merge this one into it.
796 if (ED->isCompleteDefinition() && Reader.getContext().getLangOpts().Modules) {
797 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
798 if (!OldDef) {
799 // This is the first time we've seen an imported definition. Look for a
800 // local definition before deciding that we are the first definition.
801 for (auto *D : merged_redecls(D: ED->getCanonicalDecl())) {
802 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
803 OldDef = D;
804 break;
805 }
806 }
807 }
808 if (OldDef) {
809 Reader.MergedDeclContexts.insert(KV: std::make_pair(x&: ED, y&: OldDef));
810 ED->demoteThisDefinitionToDeclaration();
811 Reader.mergeDefinitionVisibility(Def: OldDef, MergedDef: ED);
812 // We don't want to check the ODR hash value for declarations from global
813 // module fragment.
814 if (!shouldSkipCheckingODR(D: ED) && !shouldSkipCheckingODR(D: OldDef) &&
815 OldDef->getODRHash() != ED->getODRHash())
816 Reader.PendingEnumOdrMergeFailures[OldDef].push_back(Elt: ED);
817 } else {
818 OldDef = ED;
819 }
820 }
821
822 if (auto *InstED = readDeclAs<EnumDecl>()) {
823 auto TSK = (TemplateSpecializationKind)Record.readInt();
824 SourceLocation POI = readSourceLocation();
825 ED->setInstantiationOfMemberEnum(C&: Reader.getContext(), ED: InstED, TSK);
826 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
827 }
828}
829
830RedeclarableResult ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
831 RedeclarableResult Redecl = VisitTagDecl(TD: RD);
832
833 BitsUnpacker RecordDeclBits(Record.readInt());
834 RD->setHasFlexibleArrayMember(RecordDeclBits.getNextBit());
835 RD->setAnonymousStructOrUnion(RecordDeclBits.getNextBit());
836 RD->setHasObjectMember(RecordDeclBits.getNextBit());
837 RD->setHasVolatileMember(RecordDeclBits.getNextBit());
838 RD->setNonTrivialToPrimitiveDefaultInitialize(RecordDeclBits.getNextBit());
839 RD->setNonTrivialToPrimitiveCopy(RecordDeclBits.getNextBit());
840 RD->setNonTrivialToPrimitiveDestroy(RecordDeclBits.getNextBit());
841 RD->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(
842 RecordDeclBits.getNextBit());
843 RD->setHasNonTrivialToPrimitiveDestructCUnion(RecordDeclBits.getNextBit());
844 RD->setHasNonTrivialToPrimitiveCopyCUnion(RecordDeclBits.getNextBit());
845 RD->setHasUninitializedExplicitInitFields(RecordDeclBits.getNextBit());
846 RD->setParamDestroyedInCallee(RecordDeclBits.getNextBit());
847 RD->setArgPassingRestrictions(
848 (RecordArgPassingKind)RecordDeclBits.getNextBits(/*Width=*/2));
849 return Redecl;
850}
851
852void ASTDeclReader::VisitRecordDecl(RecordDecl *RD) {
853 VisitRecordDeclImpl(RD);
854 RD->setODRHash(Record.readInt());
855
856 // Maintain the invariant of a redeclaration chain containing only
857 // a single definition.
858 if (RD->isCompleteDefinition()) {
859 RecordDecl *Canon = static_cast<RecordDecl *>(RD->getCanonicalDecl());
860 RecordDecl *&OldDef = Reader.RecordDefinitions[Canon];
861 if (!OldDef) {
862 // This is the first time we've seen an imported definition. Look for a
863 // local definition before deciding that we are the first definition.
864 for (auto *D : merged_redecls(D: Canon)) {
865 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
866 OldDef = D;
867 break;
868 }
869 }
870 }
871 if (OldDef) {
872 Reader.MergedDeclContexts.insert(KV: std::make_pair(x&: RD, y&: OldDef));
873 RD->demoteThisDefinitionToDeclaration();
874 Reader.mergeDefinitionVisibility(Def: OldDef, MergedDef: RD);
875 if (OldDef->getODRHash() != RD->getODRHash())
876 Reader.PendingRecordOdrMergeFailures[OldDef].push_back(Elt: RD);
877 } else {
878 OldDef = RD;
879 }
880 }
881}
882
883void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
884 VisitNamedDecl(ND: VD);
885 // For function or variable declarations, defer reading the type in case the
886 // declaration has a deduced type that references an entity declared within
887 // the function definition or variable initializer.
888 if (isa<FunctionDecl, VarDecl>(Val: VD))
889 DeferredTypeID = Record.getGlobalTypeID(LocalID: Record.readInt());
890 else
891 VD->setType(Record.readType());
892}
893
894void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
895 VisitValueDecl(VD: ECD);
896 if (Record.readInt())
897 ECD->setInitExpr(Record.readExpr());
898 ECD->setInitVal(C: Reader.getContext(), V: Record.readAPSInt());
899 mergeMergeable(D: ECD);
900}
901
902void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
903 VisitValueDecl(VD: DD);
904 DD->setInnerLocStart(readSourceLocation());
905 if (Record.readInt()) { // hasExtInfo
906 auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
907 Record.readQualifierInfo(Info&: *Info);
908 Info->TrailingRequiresClause = AssociatedConstraint(
909 Record.readExpr(),
910 UnsignedOrNone::fromInternalRepresentation(Rep: Record.readUInt32()));
911 DD->DeclInfo = Info;
912 }
913 QualType TSIType = Record.readType();
914 DD->setTypeSourceInfo(
915 TSIType.isNull() ? nullptr
916 : Reader.getContext().CreateTypeSourceInfo(T: TSIType));
917}
918
919void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
920 RedeclarableResult Redecl = VisitRedeclarable(D: FD);
921
922 FunctionDecl *Existing = nullptr;
923
924 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
925 case FunctionDecl::TK_NonTemplate:
926 break;
927 case FunctionDecl::TK_DependentNonTemplate:
928 FD->setInstantiatedFromDecl(readDeclAs<FunctionDecl>());
929 break;
930 case FunctionDecl::TK_FunctionTemplate: {
931 auto *Template = readDeclAs<FunctionTemplateDecl>();
932 Template->init(NewTemplatedDecl: FD);
933 FD->setDescribedFunctionTemplate(Template);
934 break;
935 }
936 case FunctionDecl::TK_MemberSpecialization: {
937 auto *InstFD = readDeclAs<FunctionDecl>();
938 auto TSK = (TemplateSpecializationKind)Record.readInt();
939 SourceLocation POI = readSourceLocation();
940 FD->setInstantiationOfMemberFunction(C&: Reader.getContext(), FD: InstFD, TSK);
941 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
942 break;
943 }
944 case FunctionDecl::TK_FunctionTemplateSpecialization: {
945 auto *Template = readDeclAs<FunctionTemplateDecl>();
946 auto TSK = (TemplateSpecializationKind)Record.readInt();
947
948 // Template arguments.
949 SmallVector<TemplateArgument, 8> TemplArgs;
950 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
951
952 // Template args as written.
953 TemplateArgumentListInfo TemplArgsWritten;
954 bool HasTemplateArgumentsAsWritten = Record.readBool();
955 if (HasTemplateArgumentsAsWritten)
956 Record.readTemplateArgumentListInfo(Result&: TemplArgsWritten);
957
958 SourceLocation POI = readSourceLocation();
959
960 ASTContext &C = Reader.getContext();
961 TemplateArgumentList *TemplArgList =
962 TemplateArgumentList::CreateCopy(Context&: C, Args: TemplArgs);
963
964 MemberSpecializationInfo *MSInfo = nullptr;
965 if (Record.readInt()) {
966 auto *FD = readDeclAs<FunctionDecl>();
967 auto TSK = (TemplateSpecializationKind)Record.readInt();
968 SourceLocation POI = readSourceLocation();
969
970 MSInfo = new (C) MemberSpecializationInfo(FD, TSK);
971 MSInfo->setPointOfInstantiation(POI);
972 }
973
974 FunctionTemplateSpecializationInfo *FTInfo =
975 FunctionTemplateSpecializationInfo::Create(
976 C, FD, Template, TSK, TemplateArgs: TemplArgList,
977 TemplateArgsAsWritten: HasTemplateArgumentsAsWritten ? &TemplArgsWritten : nullptr, POI,
978 MSInfo);
979 FD->TemplateOrSpecialization = FTInfo;
980
981 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
982 // The template that contains the specializations set. It's not safe to
983 // use getCanonicalDecl on Template since it may still be initializing.
984 auto *CanonTemplate = readDeclAs<FunctionTemplateDecl>();
985 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
986 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
987 // FunctionTemplateSpecializationInfo's Profile().
988 // We avoid getASTContext because a decl in the parent hierarchy may
989 // be initializing.
990 llvm::FoldingSetNodeID ID;
991 FunctionTemplateSpecializationInfo::Profile(ID, TemplateArgs: TemplArgs, Context: C);
992 void *InsertPos = nullptr;
993 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
994 FunctionTemplateSpecializationInfo *ExistingInfo =
995 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
996 if (InsertPos)
997 CommonPtr->Specializations.InsertNode(N: FTInfo, InsertPos);
998 else {
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::VisitExplicitInstantiationDecl(
2788 ExplicitInstantiationDecl *D) {
2789 // Note: trailing flags were already read by ReadDeclRecord and passed to
2790 // CreateDeserialized, so TypeAndFlags.getInt() is already set.
2791 VisitDecl(D);
2792 auto *Spec = readDeclAs<NamedDecl>();
2793 D->SpecAndTSK.setPointer(Spec);
2794 D->ExternLoc = readSourceLocation();
2795 D->NameLoc = readSourceLocation();
2796 TypeSourceInfo *TSI = readTypeSourceInfo();
2797 unsigned TSK = Record.readInt();
2798 D->SpecAndTSK.setInt(TSK);
2799 D->TypeAndFlags.setPointer(TSI); // preserves trailing flags in int bits
2800 // Read trailing objects.
2801 if (D->hasTrailingQualifier())
2802 *D->getTrailingObjects<NestedNameSpecifierLoc>() =
2803 Record.readNestedNameSpecifierLoc();
2804 if (D->hasTrailingArgsAsWritten())
2805 *D->getTrailingObjects<const ASTTemplateArgumentListInfo *>() =
2806 Record.readASTTemplateArgumentListInfo();
2807
2808 // Rebuild the ASTContext map from specialization to EID.
2809 if (Spec)
2810 Reader.getContext().addExplicitInstantiationDecl(Spec, EID: D);
2811}
2812
2813void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2814 VisitDecl(D);
2815}
2816
2817void ASTDeclReader::VisitLifetimeExtendedTemporaryDecl(
2818 LifetimeExtendedTemporaryDecl *D) {
2819 VisitDecl(D);
2820 D->ExtendingDecl = readDeclAs<ValueDecl>();
2821 D->ExprWithTemporary = Record.readStmt();
2822 if (Record.readInt()) {
2823 D->Value = new (D->getASTContext()) APValue(Record.readAPValue());
2824 D->getASTContext().addDestruction(Ptr: D->Value);
2825 }
2826 D->ManglingNumber = Record.readInt();
2827 mergeMergeable(D);
2828}
2829
2830void ASTDeclReader::VisitDeclContext(DeclContext *DC,
2831 LookupBlockOffsets &Offsets) {
2832 Offsets.LexicalOffset = ReadLocalOffset();
2833 Offsets.VisibleOffset = ReadLocalOffset();
2834 Offsets.ModuleLocalOffset = ReadLocalOffset();
2835 Offsets.TULocalOffset = ReadLocalOffset();
2836}
2837
2838template <typename T>
2839RedeclarableResult ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2840 GlobalDeclID FirstDeclID = readDeclID();
2841 Decl *MergeWith = nullptr;
2842
2843 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2844 bool IsFirstLocalDecl = false;
2845
2846 uint64_t RedeclOffset = 0;
2847
2848 // invalid FirstDeclID indicates that this declaration was the only
2849 // declaration of its entity, and is used for space optimization.
2850 if (FirstDeclID.isInvalid()) {
2851 FirstDeclID = ThisDeclID;
2852 IsKeyDecl = true;
2853 IsFirstLocalDecl = true;
2854 } else if (unsigned N = Record.readInt()) {
2855 // This declaration was the first local declaration, but may have imported
2856 // other declarations.
2857 IsKeyDecl = N == 1;
2858 IsFirstLocalDecl = true;
2859
2860 // We have some declarations that must be before us in our redeclaration
2861 // chain. Read them now, and remember that we ought to merge with one of
2862 // them.
2863 // FIXME: Provide a known merge target to the second and subsequent such
2864 // declaration.
2865 for (unsigned I = 0; I != N - 1; ++I)
2866 MergeWith = readDecl();
2867
2868 RedeclOffset = ReadLocalOffset();
2869 } else {
2870 // This declaration was not the first local declaration. Read the first
2871 // local declaration now, to trigger the import of other redeclarations.
2872 (void)readDecl();
2873 }
2874
2875 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(ID: FirstDeclID));
2876 if (FirstDecl != D) {
2877 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2878 // We temporarily set the first (canonical) declaration as the previous one
2879 // which is the one that matters and mark the real previous DeclID to be
2880 // loaded & attached later on.
2881 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2882 D->First = FirstDecl->getCanonicalDecl();
2883 }
2884
2885 auto *DAsT = static_cast<T *>(D);
2886
2887 // Note that we need to load local redeclarations of this decl and build a
2888 // decl chain for them. This must happen *after* we perform the preloading
2889 // above; this ensures that the redeclaration chain is built in the correct
2890 // order.
2891 if (IsFirstLocalDecl)
2892 Reader.PendingDeclChains.push_back(Elt: std::make_pair(DAsT, RedeclOffset));
2893
2894 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2895}
2896
2897/// Attempts to merge the given declaration (D) with another declaration
2898/// of the same entity.
2899template <typename T>
2900void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2901 RedeclarableResult &Redecl) {
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 (!DBase->isFirstDecl())
2908 return;
2909
2910 auto *D = static_cast<T *>(DBase);
2911
2912 if (auto *Existing = Redecl.getKnownMergeTarget())
2913 // We already know of an existing declaration we should merge with.
2914 MergeImpl.mergeRedeclarable(D, cast<T>(Existing), Redecl);
2915 else if (FindExistingResult ExistingRes = findExisting(D))
2916 if (T *Existing = ExistingRes)
2917 MergeImpl.mergeRedeclarable(D, Existing, Redecl);
2918}
2919
2920/// Attempt to merge D with a previous declaration of the same lambda, which is
2921/// found by its index within its context declaration, if it has one.
2922///
2923/// We can't look up lambdas in their enclosing lexical or semantic context in
2924/// general, because for lambdas in variables, both of those might be a
2925/// namespace or the translation unit.
2926void ASTDeclMerger::mergeLambda(CXXRecordDecl *D, RedeclarableResult &Redecl,
2927 Decl &Context, unsigned IndexInContext) {
2928 // If modules are not available, there is no reason to perform this merge.
2929 if (!Reader.getContext().getLangOpts().Modules)
2930 return;
2931
2932 // If we're not the canonical declaration, we don't need to merge.
2933 if (!D->isFirstDecl())
2934 return;
2935
2936 if (auto *Existing = Redecl.getKnownMergeTarget())
2937 // We already know of an existing declaration we should merge with.
2938 mergeRedeclarable(D, Existing: cast<TagDecl>(Val: Existing), Redecl);
2939
2940 // Look up this lambda to see if we've seen it before. If so, merge with the
2941 // one we already loaded.
2942 NamedDecl *&Slot = Reader.LambdaDeclarationsForMerging[{
2943 Context.getCanonicalDecl(), IndexInContext}];
2944 if (Slot)
2945 mergeRedeclarable(D, Existing: cast<TagDecl>(Val: Slot), Redecl);
2946 else
2947 Slot = D;
2948}
2949
2950void ASTDeclReader::mergeRedeclarableTemplate(RedeclarableTemplateDecl *D,
2951 RedeclarableResult &Redecl) {
2952 mergeRedeclarable(DBase: D, Redecl);
2953 // If we merged the template with a prior declaration chain, merge the
2954 // common pointer.
2955 // FIXME: Actually merge here, don't just overwrite.
2956 D->Common = D->getCanonicalDecl()->Common;
2957}
2958
2959/// "Cast" to type T, asserting if we don't have an implicit conversion.
2960/// We use this to put code in a template that will only be valid for certain
2961/// instantiations.
2962template<typename T> static T assert_cast(T t) { return t; }
2963template<typename T> static T assert_cast(...) {
2964 llvm_unreachable("bad assert_cast");
2965}
2966
2967/// Merge together the pattern declarations from two template
2968/// declarations.
2969void ASTDeclMerger::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2970 RedeclarableTemplateDecl *Existing,
2971 bool IsKeyDecl) {
2972 auto *DPattern = D->getTemplatedDecl();
2973 auto *ExistingPattern = Existing->getTemplatedDecl();
2974 RedeclarableResult Result(
2975 /*MergeWith*/ ExistingPattern,
2976 DPattern->getCanonicalDecl()->getGlobalID(), IsKeyDecl);
2977
2978 if (auto *DClass = dyn_cast<CXXRecordDecl>(Val: DPattern)) {
2979 // Merge with any existing definition.
2980 // FIXME: This is duplicated in several places. Refactor.
2981 auto *ExistingClass =
2982 cast<CXXRecordDecl>(Val: ExistingPattern)->getCanonicalDecl();
2983 if (auto *DDD = DClass->DefinitionData) {
2984 if (ExistingClass->DefinitionData) {
2985 MergeDefinitionData(D: ExistingClass, MergeDD: std::move(*DDD));
2986 } else {
2987 ExistingClass->DefinitionData = DClass->DefinitionData;
2988 // We may have skipped this before because we thought that DClass
2989 // was the canonical declaration.
2990 Reader.PendingDefinitions.insert(Ptr: DClass);
2991 }
2992 }
2993 DClass->DefinitionData = ExistingClass->DefinitionData;
2994
2995 return mergeRedeclarable(D: DClass, Existing: cast<TagDecl>(Val: ExistingPattern),
2996 Redecl&: Result);
2997 }
2998 if (auto *DFunction = dyn_cast<FunctionDecl>(Val: DPattern))
2999 return mergeRedeclarable(D: DFunction, Existing: cast<FunctionDecl>(Val: ExistingPattern),
3000 Redecl&: Result);
3001 if (auto *DVar = dyn_cast<VarDecl>(Val: DPattern))
3002 return mergeRedeclarable(D: DVar, Existing: cast<VarDecl>(Val: ExistingPattern), Redecl&: Result);
3003 if (auto *DAlias = dyn_cast<TypeAliasDecl>(Val: DPattern))
3004 return mergeRedeclarable(D: DAlias, Existing: cast<TypedefNameDecl>(Val: ExistingPattern),
3005 Redecl&: Result);
3006 llvm_unreachable("merged an unknown kind of redeclarable template");
3007}
3008
3009/// Attempts to merge the given declaration (D) with another declaration
3010/// of the same entity.
3011template <typename T>
3012void ASTDeclMerger::mergeRedeclarableImpl(Redeclarable<T> *DBase, T *Existing,
3013 GlobalDeclID KeyDeclID) {
3014 auto *D = static_cast<T *>(DBase);
3015 T *ExistingCanon = Existing->getCanonicalDecl();
3016 T *DCanon = D->getCanonicalDecl();
3017 if (ExistingCanon != DCanon) {
3018 // Have our redeclaration link point back at the canonical declaration
3019 // of the existing declaration, so that this declaration has the
3020 // appropriate canonical declaration.
3021 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
3022 D->First = ExistingCanon;
3023 ExistingCanon->Used |= D->Used;
3024 D->Used = false;
3025
3026 bool IsKeyDecl = KeyDeclID.isValid();
3027
3028 // When we merge a template, merge its pattern.
3029 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
3030 mergeTemplatePattern(
3031 D: DTemplate, Existing: assert_cast<RedeclarableTemplateDecl *>(ExistingCanon),
3032 IsKeyDecl);
3033
3034 // If this declaration is a key declaration, make a note of that.
3035 if (IsKeyDecl)
3036 Reader.KeyDecls[ExistingCanon].push_back(KeyDeclID);
3037 }
3038}
3039
3040/// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
3041/// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
3042/// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
3043/// that some types are mergeable during deserialization, otherwise name
3044/// lookup fails. This is the case for EnumConstantDecl.
3045static bool allowODRLikeMergeInC(NamedDecl *ND) {
3046 if (!ND)
3047 return false;
3048 // TODO: implement merge for other necessary decls.
3049 if (isa<EnumConstantDecl, FieldDecl, IndirectFieldDecl>(Val: ND))
3050 return true;
3051 return false;
3052}
3053
3054/// Attempts to merge LifetimeExtendedTemporaryDecl with
3055/// identical class definitions from two different modules.
3056void ASTDeclReader::mergeMergeable(LifetimeExtendedTemporaryDecl *D) {
3057 // If modules are not available, there is no reason to perform this merge.
3058 if (!Reader.getContext().getLangOpts().Modules)
3059 return;
3060
3061 LifetimeExtendedTemporaryDecl *LETDecl = D;
3062
3063 LifetimeExtendedTemporaryDecl *&LookupResult =
3064 Reader.LETemporaryForMerging[std::make_pair(
3065 x: LETDecl->getExtendingDecl(), y: LETDecl->getManglingNumber())];
3066 if (LookupResult)
3067 Reader.getContext().setPrimaryMergedDecl(D: LETDecl,
3068 Primary: LookupResult->getCanonicalDecl());
3069 else
3070 LookupResult = LETDecl;
3071}
3072
3073/// Attempts to merge the given declaration (D) with another declaration
3074/// of the same entity, for the case where the entity is not actually
3075/// redeclarable. This happens, for instance, when merging the fields of
3076/// identical class definitions from two different modules.
3077template<typename T>
3078void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
3079 // If modules are not available, there is no reason to perform this merge.
3080 if (!Reader.getContext().getLangOpts().Modules)
3081 return;
3082
3083 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
3084 // Note that C identically-named things in different translation units are
3085 // not redeclarations, but may still have compatible types, where ODR-like
3086 // semantics may apply.
3087 if (!Reader.getContext().getLangOpts().CPlusPlus &&
3088 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
3089 return;
3090
3091 if (FindExistingResult ExistingRes = findExisting(D: static_cast<T*>(D)))
3092 if (T *Existing = ExistingRes)
3093 Reader.getContext().setPrimaryMergedDecl(D: static_cast<T *>(D),
3094 Primary: Existing->getCanonicalDecl());
3095}
3096
3097void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
3098 Record.readOMPChildren(Data: D->Data);
3099 VisitDecl(D);
3100}
3101
3102void ASTDeclReader::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
3103 Record.readOMPChildren(Data: D->Data);
3104 VisitDecl(D);
3105}
3106
3107void ASTDeclReader::VisitOMPRequiresDecl(OMPRequiresDecl * D) {
3108 Record.readOMPChildren(Data: D->Data);
3109 VisitDecl(D);
3110}
3111
3112void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
3113 VisitValueDecl(VD: D);
3114 D->setLocation(readSourceLocation());
3115 Expr *In = Record.readExpr();
3116 Expr *Out = Record.readExpr();
3117 D->setCombinerData(InE: In, OutE: Out);
3118 Expr *Combiner = Record.readExpr();
3119 D->setCombiner(Combiner);
3120 Expr *Orig = Record.readExpr();
3121 Expr *Priv = Record.readExpr();
3122 D->setInitializerData(OrigE: Orig, PrivE: Priv);
3123 Expr *Init = Record.readExpr();
3124 auto IK = static_cast<OMPDeclareReductionInitKind>(Record.readInt());
3125 D->setInitializer(E: Init, IK);
3126 D->PrevDeclInScope = readDeclID().getRawValue();
3127}
3128
3129void ASTDeclReader::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
3130 Record.readOMPChildren(Data: D->Data);
3131 VisitValueDecl(VD: D);
3132 D->VarName = Record.readDeclarationName();
3133 D->PrevDeclInScope = readDeclID().getRawValue();
3134}
3135
3136void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
3137 VisitVarDecl(VD: D);
3138}
3139
3140void ASTDeclReader::VisitOpenACCDeclareDecl(OpenACCDeclareDecl *D) {
3141 VisitDecl(D);
3142 D->DirKind = Record.readEnum<OpenACCDirectiveKind>();
3143 D->DirectiveLoc = Record.readSourceLocation();
3144 D->EndLoc = Record.readSourceLocation();
3145 Record.readOpenACCClauseList(Clauses: D->Clauses);
3146}
3147void ASTDeclReader::VisitOpenACCRoutineDecl(OpenACCRoutineDecl *D) {
3148 VisitDecl(D);
3149 D->DirKind = Record.readEnum<OpenACCDirectiveKind>();
3150 D->DirectiveLoc = Record.readSourceLocation();
3151 D->EndLoc = Record.readSourceLocation();
3152 D->ParensLoc = Record.readSourceRange();
3153 D->FuncRef = Record.readExpr();
3154 Record.readOpenACCClauseList(Clauses: D->Clauses);
3155}
3156
3157//===----------------------------------------------------------------------===//
3158// Attribute Reading
3159//===----------------------------------------------------------------------===//
3160
3161namespace {
3162class AttrReader {
3163 ASTRecordReader &Reader;
3164
3165public:
3166 AttrReader(ASTRecordReader &Reader) : Reader(Reader) {}
3167
3168 uint64_t readInt() {
3169 return Reader.readInt();
3170 }
3171
3172 bool readBool() { return Reader.readBool(); }
3173
3174 SourceRange readSourceRange() {
3175 return Reader.readSourceRange();
3176 }
3177
3178 SourceLocation readSourceLocation() {
3179 return Reader.readSourceLocation();
3180 }
3181
3182 Expr *readExpr() { return Reader.readExpr(); }
3183
3184 Attr *readAttr() { return Reader.readAttr(); }
3185
3186 std::string readString() {
3187 return Reader.readString();
3188 }
3189
3190 TypeSourceInfo *readTypeSourceInfo() {
3191 return Reader.readTypeSourceInfo();
3192 }
3193
3194 IdentifierInfo *readIdentifier() {
3195 return Reader.readIdentifier();
3196 }
3197
3198 VersionTuple readVersionTuple() {
3199 return Reader.readVersionTuple();
3200 }
3201
3202 OMPTraitInfo *readOMPTraitInfo() { return Reader.readOMPTraitInfo(); }
3203
3204 template <typename T> T *readDeclAs() { return Reader.readDeclAs<T>(); }
3205};
3206}
3207
3208Attr *ASTRecordReader::readAttr() {
3209 AttrReader Record(*this);
3210 auto V = Record.readInt();
3211 if (!V)
3212 return nullptr;
3213
3214 Attr *New = nullptr;
3215 // Kind is stored as a 1-based integer because 0 is used to indicate a null
3216 // Attr pointer.
3217 auto Kind = static_cast<attr::Kind>(V - 1);
3218 ASTContext &Context = getContext();
3219
3220 IdentifierInfo *AttrName = Record.readIdentifier();
3221 IdentifierInfo *ScopeName = Record.readIdentifier();
3222 SourceRange AttrRange = Record.readSourceRange();
3223 SourceLocation ScopeLoc = Record.readSourceLocation();
3224 unsigned ParsedKind = Record.readInt();
3225 unsigned Syntax = Record.readInt();
3226 unsigned SpellingIndex = Record.readInt();
3227 bool IsAlignas = (ParsedKind == AttributeCommonInfo::AT_Aligned &&
3228 Syntax == AttributeCommonInfo::AS_Keyword &&
3229 SpellingIndex == AlignedAttr::Keyword_alignas);
3230 bool IsRegularKeywordAttribute = Record.readBool();
3231
3232 AttributeCommonInfo Info(AttrName, AttributeScopeInfo(ScopeName, ScopeLoc),
3233 AttrRange, AttributeCommonInfo::Kind(ParsedKind),
3234 {AttributeCommonInfo::Syntax(Syntax), SpellingIndex,
3235 IsAlignas, IsRegularKeywordAttribute});
3236
3237#include "clang/Serialization/AttrPCHRead.inc"
3238
3239 assert(New && "Unable to decode attribute?");
3240 return New;
3241}
3242
3243/// Reads attributes from the current stream position.
3244void ASTRecordReader::readAttributes(AttrVec &Attrs) {
3245 for (unsigned I = 0, E = readInt(); I != E; ++I)
3246 if (auto *A = readAttr())
3247 Attrs.push_back(Elt: A);
3248}
3249
3250//===----------------------------------------------------------------------===//
3251// ASTReader Implementation
3252//===----------------------------------------------------------------------===//
3253
3254/// Note that we have loaded the declaration with the given
3255/// Index.
3256///
3257/// This routine notes that this declaration has already been loaded,
3258/// so that future GetDecl calls will return this declaration rather
3259/// than trying to load a new declaration.
3260inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
3261 assert(!DeclsLoaded[Index] && "Decl loaded twice?");
3262 DeclsLoaded[Index] = D;
3263}
3264
3265/// Determine whether the consumer will be interested in seeing
3266/// this declaration (via HandleTopLevelDecl).
3267///
3268/// This routine should return true for anything that might affect
3269/// code generation, e.g., inline function definitions, Objective-C
3270/// declarations with metadata, etc.
3271bool ASTReader::isConsumerInterestedIn(Decl *D) {
3272 // An ObjCMethodDecl is never considered as "interesting" because its
3273 // implementation container always is.
3274
3275 // An ImportDecl or VarDecl imported from a module map module will get
3276 // emitted when we import the relevant module.
3277 if (isPartOfPerModuleInitializer(D)) {
3278 auto *M = D->getImportedOwningModule();
3279 if (M && M->Kind == Module::ModuleMapModule &&
3280 getContext().DeclMustBeEmitted(D))
3281 return false;
3282 }
3283
3284 if (isa<FileScopeAsmDecl, TopLevelStmtDecl, ObjCProtocolDecl, ObjCImplDecl,
3285 ImportDecl, PragmaCommentDecl, PragmaDetectMismatchDecl>(Val: D))
3286 return true;
3287 if (isa<OMPThreadPrivateDecl, OMPDeclareReductionDecl, OMPDeclareMapperDecl,
3288 OMPAllocateDecl, OMPRequiresDecl>(Val: D))
3289 return !D->getDeclContext()->isFunctionOrMethod();
3290 if (const auto *Var = dyn_cast<VarDecl>(Val: D))
3291 return Var->isFileVarDecl() &&
3292 (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
3293 OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD: Var));
3294 if (const auto *Func = dyn_cast<FunctionDecl>(Val: D))
3295 return Func->doesThisDeclarationHaveABody() || PendingBodies.count(Key: D);
3296
3297 if (auto *ES = D->getASTContext().getExternalSource())
3298 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
3299 return true;
3300
3301 return false;
3302}
3303
3304/// Get the correct cursor and offset for loading a declaration.
3305ASTReader::RecordLocation ASTReader::DeclCursorForID(GlobalDeclID ID,
3306 SourceLocation &Loc) {
3307 ModuleFile *M = getOwningModuleFile(ID);
3308 assert(M);
3309 unsigned LocalDeclIndex = ID.getLocalDeclIndex();
3310 const DeclOffset &DOffs = M->DeclOffsets[LocalDeclIndex];
3311 Loc = ReadSourceLocation(MF&: *M, Raw: DOffs.getRawLoc());
3312 return RecordLocation(M, DOffs.getBitOffset(DeclTypesBlockStartOffset: M->DeclsBlockStartOffset));
3313}
3314
3315ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
3316 auto I = GlobalBitOffsetsMap.find(K: GlobalOffset);
3317
3318 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
3319 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
3320}
3321
3322uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint64_t LocalOffset) {
3323 return LocalOffset + M.GlobalBitOffset;
3324}
3325
3326CXXRecordDecl *
3327ASTDeclReader::getOrFakePrimaryClassDefinition(ASTReader &Reader,
3328 CXXRecordDecl *RD) {
3329 // Try to dig out the definition.
3330 auto *DD = RD->DefinitionData;
3331 if (!DD)
3332 DD = RD->getCanonicalDecl()->DefinitionData;
3333
3334 // If there's no definition yet, then DC's definition is added by an update
3335 // record, but we've not yet loaded that update record. In this case, we
3336 // commit to DC being the canonical definition now, and will fix this when
3337 // we load the update record.
3338 if (!DD) {
3339 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3340 RD->setCompleteDefinition(true);
3341 RD->DefinitionData = DD;
3342 RD->getCanonicalDecl()->DefinitionData = DD;
3343
3344 // Track that we did this horrible thing so that we can fix it later.
3345 Reader.PendingFakeDefinitionData.insert(
3346 KV: std::make_pair(x&: DD, y: ASTReader::PendingFakeDefinitionKind::Fake));
3347 }
3348
3349 return DD->Definition;
3350}
3351
3352/// Find the context in which we should search for previous declarations when
3353/// looking for declarations to merge.
3354DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3355 DeclContext *DC) {
3356 if (auto *ND = dyn_cast<NamespaceDecl>(Val: DC))
3357 return ND->getFirstDecl();
3358
3359 if (auto *RD = dyn_cast<CXXRecordDecl>(Val: DC))
3360 return getOrFakePrimaryClassDefinition(Reader, RD);
3361
3362 if (auto *RD = dyn_cast<RecordDecl>(Val: DC))
3363 return RD->getDefinition();
3364
3365 if (auto *ED = dyn_cast<EnumDecl>(Val: DC))
3366 return ED->getDefinition();
3367
3368 if (auto *OID = dyn_cast<ObjCInterfaceDecl>(Val: DC))
3369 return OID->getDefinition();
3370
3371 // We can see the TU here only if we have no Sema object. It is possible
3372 // we're in clang-repl so we still need to get the primary context.
3373 if (auto *TU = dyn_cast<TranslationUnitDecl>(Val: DC))
3374 return TU->getPrimaryContext();
3375
3376 return nullptr;
3377}
3378
3379ASTDeclReader::FindExistingResult::~FindExistingResult() {
3380 // Record that we had a typedef name for linkage whether or not we merge
3381 // with that declaration.
3382 if (TypedefNameForLinkage) {
3383 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3384 Reader.ImportedTypedefNamesForLinkage.insert(
3385 KV: std::make_pair(x: std::make_pair(x&: DC, y&: TypedefNameForLinkage), y&: New));
3386 return;
3387 }
3388
3389 if (!AddResult || Existing)
3390 return;
3391
3392 DeclarationName Name = New->getDeclName();
3393 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3394 if (needsAnonymousDeclarationNumber(D: New)) {
3395 setAnonymousDeclForMerging(Reader, DC: New->getLexicalDeclContext(),
3396 Index: AnonymousDeclNumber, D: New);
3397 } else if (DC->isTranslationUnit() &&
3398 !Reader.getContext().getLangOpts().CPlusPlus) {
3399 if (Reader.getIdResolver().tryAddTopLevelDecl(D: New, Name))
3400 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3401 .push_back(Elt: New);
3402 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3403 // Add the declaration to its redeclaration context so later merging
3404 // lookups will find it.
3405 MergeDC->makeDeclVisibleInContextImpl(D: New, /*Internal*/true);
3406 }
3407}
3408
3409/// Find the declaration that should be merged into, given the declaration found
3410/// by name lookup. If we're merging an anonymous declaration within a typedef,
3411/// we need a matching typedef, and we merge with the type inside it.
3412static NamedDecl *getDeclForMerging(NamedDecl *Found,
3413 bool IsTypedefNameForLinkage) {
3414 if (!IsTypedefNameForLinkage)
3415 return Found;
3416
3417 // If we found a typedef declaration that gives a name to some other
3418 // declaration, then we want that inner declaration. Declarations from
3419 // AST files are handled via ImportedTypedefNamesForLinkage.
3420 if (Found->isFromASTFile())
3421 return nullptr;
3422
3423 if (auto *TND = dyn_cast<TypedefNameDecl>(Val: Found))
3424 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3425
3426 return nullptr;
3427}
3428
3429/// Find the declaration to use to populate the anonymous declaration table
3430/// for the given lexical DeclContext. We only care about finding local
3431/// definitions of the context; we'll merge imported ones as we go.
3432DeclContext *
3433ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3434 // For classes, we track the definition as we merge.
3435 if (auto *RD = dyn_cast<CXXRecordDecl>(Val: LexicalDC)) {
3436 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3437 return DD ? DD->Definition : nullptr;
3438 } else if (auto *OID = dyn_cast<ObjCInterfaceDecl>(Val: LexicalDC)) {
3439 return OID->getCanonicalDecl()->getDefinition();
3440 }
3441
3442 // For anything else, walk its merged redeclarations looking for a definition.
3443 // Note that we can't just call getDefinition here because the redeclaration
3444 // chain isn't wired up.
3445 for (auto *D : merged_redecls(D: cast<Decl>(Val: LexicalDC))) {
3446 if (auto *FD = dyn_cast<FunctionDecl>(Val: D))
3447 if (FD->isThisDeclarationADefinition())
3448 return FD;
3449 if (auto *MD = dyn_cast<ObjCMethodDecl>(Val: D))
3450 if (MD->isThisDeclarationADefinition())
3451 return MD;
3452 if (auto *RD = dyn_cast<RecordDecl>(Val: D))
3453 if (RD->isThisDeclarationADefinition())
3454 return RD;
3455 }
3456
3457 // No merged definition yet.
3458 return nullptr;
3459}
3460
3461NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3462 DeclContext *DC,
3463 unsigned Index) {
3464 // If the lexical context has been merged, look into the now-canonical
3465 // definition.
3466 auto *CanonDC = cast<Decl>(Val: DC)->getCanonicalDecl();
3467
3468 // If we've seen this before, return the canonical declaration.
3469 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3470 if (Index < Previous.size() && Previous[Index])
3471 return Previous[Index];
3472
3473 // If this is the first time, but we have parsed a declaration of the context,
3474 // build the anonymous declaration list from the parsed declaration.
3475 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(LexicalDC: DC);
3476 auto needToNumberAnonymousDeclsWithin = [](Decl *D) {
3477 if (!D->isFromASTFile())
3478 return true;
3479 // If this is a class template specialization from an AST file, has at least
3480 // one field, but none of the fields have been loaded from external storage,
3481 // this is a situation where the class template specialization decl
3482 // was imported but the definition was instantiated within the source.
3483 // In such a case, we still need to number the anonymous decls.
3484 auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(Val: D);
3485 return CTSD && !CTSD->noload_field_empty() &&
3486 !CTSD->hasLoadedFieldsFromExternalStorage();
3487 };
3488 if (PrimaryDC && needToNumberAnonymousDeclsWithin(cast<Decl>(Val: PrimaryDC))) {
3489 numberAnonymousDeclsWithin(DC: PrimaryDC, Visit: [&](NamedDecl *ND, unsigned Number) {
3490 if (Previous.size() == Number)
3491 Previous.push_back(Elt: cast<NamedDecl>(Val: ND->getCanonicalDecl()));
3492 else
3493 Previous[Number] = cast<NamedDecl>(Val: ND->getCanonicalDecl());
3494 });
3495 }
3496
3497 return Index < Previous.size() ? Previous[Index] : nullptr;
3498}
3499
3500void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3501 DeclContext *DC, unsigned Index,
3502 NamedDecl *D) {
3503 auto *CanonDC = cast<Decl>(Val: DC)->getCanonicalDecl();
3504
3505 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3506 if (Index >= Previous.size())
3507 Previous.resize(N: Index + 1);
3508 if (!Previous[Index])
3509 Previous[Index] = D;
3510}
3511
3512ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3513 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3514 : D->getDeclName();
3515
3516 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3517 // Don't bother trying to find unnamed declarations that are in
3518 // unmergeable contexts.
3519 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3520 AnonymousDeclNumber, TypedefNameForLinkage);
3521 Result.suppress();
3522 return Result;
3523 }
3524
3525 ASTContext &C = Reader.getContext();
3526 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3527 if (TypedefNameForLinkage) {
3528 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3529 Val: std::make_pair(x&: DC, y&: TypedefNameForLinkage));
3530 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3531 if (C.isSameEntity(X: It->second, Y: D))
3532 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3533 TypedefNameForLinkage);
3534 // Go on to check in other places in case an existing typedef name
3535 // was not imported.
3536 }
3537
3538 if (needsAnonymousDeclarationNumber(D)) {
3539 // This is an anonymous declaration that we may need to merge. Look it up
3540 // in its context by number.
3541 if (auto *Existing = getAnonymousDeclForMerging(
3542 Reader, DC: D->getLexicalDeclContext(), Index: AnonymousDeclNumber))
3543 if (C.isSameEntity(X: Existing, Y: D))
3544 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3545 TypedefNameForLinkage);
3546 } else if (DC->isTranslationUnit() &&
3547 !Reader.getContext().getLangOpts().CPlusPlus) {
3548 IdentifierResolver &IdResolver = Reader.getIdResolver();
3549
3550 // Temporarily consider the identifier to be up-to-date. We don't want to
3551 // cause additional lookups here.
3552 class UpToDateIdentifierRAII {
3553 IdentifierInfo *II;
3554 bool WasOutToDate = false;
3555
3556 public:
3557 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3558 if (II) {
3559 WasOutToDate = II->isOutOfDate();
3560 if (WasOutToDate)
3561 II->setOutOfDate(false);
3562 }
3563 }
3564
3565 ~UpToDateIdentifierRAII() {
3566 if (WasOutToDate)
3567 II->setOutOfDate(true);
3568 }
3569 } UpToDate(Name.getAsIdentifierInfo());
3570
3571 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3572 IEnd = IdResolver.end();
3573 I != IEnd; ++I) {
3574 if (NamedDecl *Existing = getDeclForMerging(Found: *I, IsTypedefNameForLinkage: TypedefNameForLinkage))
3575 if (C.isSameEntity(X: Existing, Y: D))
3576 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3577 TypedefNameForLinkage);
3578 }
3579 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3580 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3581 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3582 if (NamedDecl *Existing = getDeclForMerging(Found: *I, IsTypedefNameForLinkage: TypedefNameForLinkage))
3583 if (C.isSameEntity(X: Existing, Y: D))
3584 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3585 TypedefNameForLinkage);
3586 }
3587 } else {
3588 // Not in a mergeable context.
3589 return FindExistingResult(Reader);
3590 }
3591
3592 // If this declaration is from a merged context, make a note that we need to
3593 // check that the canonical definition of that context contains the decl.
3594 //
3595 // Note that we don't perform ODR checks for decls from the global module
3596 // fragment.
3597 //
3598 // FIXME: We should do something similar if we merge two definitions of the
3599 // same template specialization into the same CXXRecordDecl.
3600 auto MergedDCIt = Reader.MergedDeclContexts.find(Val: D->getLexicalDeclContext());
3601 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3602 !shouldSkipCheckingODR(D) && MergedDCIt->second == D->getDeclContext() &&
3603 !shouldSkipCheckingODR(D: cast<Decl>(Val: D->getDeclContext())))
3604 Reader.PendingOdrMergeChecks.push_back(Elt: D);
3605
3606 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3607 AnonymousDeclNumber, TypedefNameForLinkage);
3608}
3609
3610template<typename DeclT>
3611Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3612 return D->RedeclLink.getLatestNotUpdated();
3613}
3614
3615Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3616 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
3617}
3618
3619Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3620 assert(D);
3621
3622 switch (D->getKind()) {
3623#define ABSTRACT_DECL(TYPE)
3624#define DECL(TYPE, BASE) \
3625 case Decl::TYPE: \
3626 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3627#include "clang/AST/DeclNodes.inc"
3628 }
3629 llvm_unreachable("unknown decl kind");
3630}
3631
3632Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3633 return ASTDeclReader::getMostRecentDecl(D: D->getCanonicalDecl());
3634}
3635
3636namespace {
3637void mergeInheritableAttributes(ASTReader &Reader, Decl *D, Decl *Previous) {
3638 InheritableAttr *NewAttr = nullptr;
3639 ASTContext &Context = Reader.getContext();
3640 const auto *IA = Previous->getAttr<MSInheritanceAttr>();
3641
3642 if (IA && !D->hasAttr<MSInheritanceAttr>()) {
3643 NewAttr = cast<InheritableAttr>(Val: IA->clone(C&: Context));
3644 NewAttr->setInherited(true);
3645 D->addAttr(A: NewAttr);
3646 }
3647
3648 if (!D->hasAttr<AvailabilityAttr>()) {
3649 for (const auto *AA : Previous->specific_attrs<AvailabilityAttr>()) {
3650 NewAttr = AA->clone(C&: Context);
3651 NewAttr->setInherited(true);
3652 D->addAttr(A: NewAttr);
3653 }
3654 }
3655}
3656} // namespace
3657
3658template<typename DeclT>
3659void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3660 Redeclarable<DeclT> *D,
3661 Decl *Previous, Decl *Canon) {
3662 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3663 D->First = cast<DeclT>(Previous)->First;
3664}
3665
3666namespace clang {
3667
3668template<>
3669void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3670 Redeclarable<VarDecl> *D,
3671 Decl *Previous, Decl *Canon) {
3672 auto *PrevVD = cast<VarDecl>(Val: Previous);
3673 D->RedeclLink.setPrevious(PrevVD);
3674 D->First = PrevVD->First;
3675
3676 // We should keep at most one definition on the chain.
3677 // FIXME: Cache the definition once we've found it. Building a chain with
3678 // N definitions currently takes O(N^2) time here.
3679 auto *VD = static_cast<VarDecl *>(D);
3680 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3681 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3682 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3683 // FIXME: For header modules, there are some problems if we don't
3684 // demote definition to declaration.
3685 // See clang/test/Modules/module-init-forcelly-loaded-module.cpp
3686 // for example. Maybe we are able to handle the CodeGen part
3687 // to avoid it emitting duplicated definitions. But just workaround
3688 // now temporarily.
3689 if (VD->getOwningModule() &&
3690 VD->getOwningModule()->isHeaderLikeModule())
3691 VD->demoteThisDefinitionToDeclaration();
3692 Reader.mergeDefinitionVisibility(Def: CurD, MergedDef: VD);
3693 break;
3694 }
3695 }
3696 }
3697}
3698
3699static bool isUndeducedReturnType(QualType T) {
3700 auto *DT = T->getContainedDeducedType();
3701 return DT && !DT->isDeduced();
3702}
3703
3704template<>
3705void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3706 Redeclarable<FunctionDecl> *D,
3707 Decl *Previous, Decl *Canon) {
3708 auto *FD = static_cast<FunctionDecl *>(D);
3709 auto *PrevFD = cast<FunctionDecl>(Val: Previous);
3710
3711 FD->RedeclLink.setPrevious(PrevFD);
3712 FD->First = PrevFD->First;
3713
3714 // If the previous declaration is an inline function declaration, then this
3715 // declaration is too.
3716 if (PrevFD->isInlined() != FD->isInlined()) {
3717 // FIXME: [dcl.fct.spec]p4:
3718 // If a function with external linkage is declared inline in one
3719 // translation unit, it shall be declared inline in all translation
3720 // units in which it appears.
3721 //
3722 // Be careful of this case:
3723 //
3724 // module A:
3725 // template<typename T> struct X { void f(); };
3726 // template<typename T> inline void X<T>::f() {}
3727 //
3728 // module B instantiates the declaration of X<int>::f
3729 // module C instantiates the definition of X<int>::f
3730 //
3731 // If module B and C are merged, we do not have a violation of this rule.
3732 FD->setImplicitlyInline(true);
3733 }
3734
3735 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3736 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3737 if (FPT && PrevFPT) {
3738 // If we need to propagate an exception specification along the redecl
3739 // chain, make a note of that so that we can do so later.
3740 bool IsUnresolved = isUnresolvedExceptionSpec(ESpecType: FPT->getExceptionSpecType());
3741 bool WasUnresolved =
3742 isUnresolvedExceptionSpec(ESpecType: PrevFPT->getExceptionSpecType());
3743 if (IsUnresolved != WasUnresolved)
3744 Reader.PendingExceptionSpecUpdates.insert(
3745 KV: {Canon, IsUnresolved ? PrevFD : FD});
3746
3747 // If we need to propagate a deduced return type along the redecl chain,
3748 // make a note of that so that we can do it later.
3749 bool IsUndeduced = isUndeducedReturnType(T: FPT->getReturnType());
3750 bool WasUndeduced = isUndeducedReturnType(T: PrevFPT->getReturnType());
3751 if (IsUndeduced != WasUndeduced)
3752 Reader.PendingDeducedTypeUpdates.insert(
3753 KV: {cast<FunctionDecl>(Val: Canon),
3754 (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3755 }
3756}
3757
3758} // namespace clang
3759
3760void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3761 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
3762}
3763
3764/// Inherit the default template argument from \p From to \p To. Returns
3765/// \c false if there is no default template for \p From.
3766template <typename ParmDecl>
3767static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3768 Decl *ToD) {
3769 auto *To = cast<ParmDecl>(ToD);
3770 if (!From->hasDefaultArgument())
3771 return false;
3772 To->setInheritedDefaultArgument(Context, From);
3773 return true;
3774}
3775
3776static void inheritDefaultTemplateArguments(ASTContext &Context,
3777 TemplateDecl *From,
3778 TemplateDecl *To) {
3779 auto *FromTP = From->getTemplateParameters();
3780 auto *ToTP = To->getTemplateParameters();
3781 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
3782
3783 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3784 NamedDecl *FromParam = FromTP->getParam(Idx: I);
3785 NamedDecl *ToParam = ToTP->getParam(Idx: I);
3786
3787 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(Val: FromParam))
3788 inheritDefaultTemplateArgument(Context, From: FTTP, ToD: ToParam);
3789 else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(Val: FromParam))
3790 inheritDefaultTemplateArgument(Context, From: FNTTP, ToD: ToParam);
3791 else
3792 inheritDefaultTemplateArgument(
3793 Context, From: cast<TemplateTemplateParmDecl>(Val: FromParam), ToD: ToParam);
3794 }
3795}
3796
3797// [basic.link]/p10:
3798// If two declarations of an entity are attached to different modules,
3799// the program is ill-formed;
3800void ASTDeclReader::checkMultipleDefinitionInNamedModules(ASTReader &Reader,
3801 Decl *D,
3802 Decl *Previous) {
3803 // If it is previous implcitly introduced, it is not meaningful to
3804 // diagnose it.
3805 if (Previous->isImplicit())
3806 return;
3807
3808 // FIXME: Get rid of the enumeration of decl types once we have an appropriate
3809 // abstract for decls of an entity. e.g., the namespace decl and using decl
3810 // doesn't introduce an entity.
3811 if (!isa<VarDecl, FunctionDecl, TagDecl, RedeclarableTemplateDecl>(Val: Previous))
3812 return;
3813
3814 // Skip implicit instantiations since it may give false positive diagnostic
3815 // messages.
3816 // FIXME: Maybe this shows the implicit instantiations may have incorrect
3817 // module owner ships. But given we've finished the compilation of a module,
3818 // how can we add new entities to that module?
3819 if (isa<VarTemplateSpecializationDecl>(Val: Previous))
3820 return;
3821 if (isa<ClassTemplateSpecializationDecl>(Val: Previous))
3822 return;
3823 if (auto *Func = dyn_cast<FunctionDecl>(Val: Previous);
3824 Func && Func->getTemplateSpecializationInfo())
3825 return;
3826
3827 // The module ownership of in-class friend declaration is not straightforward.
3828 // Avoid diagnosing such cases.
3829 if (D->getFriendObjectKind() || Previous->getFriendObjectKind())
3830 return;
3831
3832 // Skip diagnosing in-class declarations.
3833 if (!Previous->getLexicalDeclContext()
3834 ->getNonTransparentContext()
3835 ->isFileContext() ||
3836 !D->getLexicalDeclContext()->getNonTransparentContext()->isFileContext())
3837 return;
3838
3839 Module *M = Previous->getOwningModule();
3840 if (!M)
3841 return;
3842
3843 // We only forbids merging decls within named modules.
3844 if (!M->isNamedModule()) {
3845 // Try to warn the case that we merged decls from global module.
3846 if (!M->isGlobalModule())
3847 return;
3848
3849 if (D->getOwningModule() &&
3850 M->getTopLevelModule() == D->getOwningModule()->getTopLevelModule())
3851 return;
3852
3853 Reader.PendingWarningForDuplicatedDefsInModuleUnits.push_back(
3854 Elt: {D, Previous});
3855 return;
3856 }
3857
3858 // It is fine if they are in the same module.
3859 if (Reader.getContext().isInSameModule(M1: M, M2: D->getOwningModule()))
3860 return;
3861
3862 Reader.Diag(Loc: Previous->getLocation(),
3863 DiagID: diag::err_multiple_decl_in_different_modules)
3864 << cast<NamedDecl>(Val: Previous) << M->Name;
3865 Reader.Diag(Loc: D->getLocation(), DiagID: diag::note_also_found);
3866}
3867
3868void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3869 Decl *Previous, Decl *Canon) {
3870 assert(D && Previous);
3871
3872 switch (D->getKind()) {
3873#define ABSTRACT_DECL(TYPE)
3874#define DECL(TYPE, BASE) \
3875 case Decl::TYPE: \
3876 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3877 break;
3878#include "clang/AST/DeclNodes.inc"
3879 }
3880
3881 checkMultipleDefinitionInNamedModules(Reader, D, Previous);
3882
3883 // If the declaration was visible in one module, a redeclaration of it in
3884 // another module remains visible even if it wouldn't be visible by itself.
3885 //
3886 // FIXME: In this case, the declaration should only be visible if a module
3887 // that makes it visible has been imported.
3888 D->IdentifierNamespace |=
3889 Previous->IdentifierNamespace &
3890 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3891
3892 // If the declaration declares a template, it may inherit default arguments
3893 // from the previous declaration.
3894 if (auto *TD = dyn_cast<TemplateDecl>(Val: D))
3895 inheritDefaultTemplateArguments(Context&: Reader.getContext(),
3896 From: cast<TemplateDecl>(Val: Previous), To: TD);
3897
3898 // If any of the declaration in the chain contains an Inheritable attribute,
3899 // it needs to be added to all the declarations in the redeclarable chain.
3900 // FIXME: Only the logic of merging MSInheritableAttr is present, it should
3901 // be extended for all inheritable attributes.
3902 mergeInheritableAttributes(Reader, D, Previous);
3903}
3904
3905template<typename DeclT>
3906void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3907 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3908}
3909
3910void ASTDeclReader::attachLatestDeclImpl(...) {
3911 llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3912}
3913
3914void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3915 assert(D && Latest);
3916
3917 switch (D->getKind()) {
3918#define ABSTRACT_DECL(TYPE)
3919#define DECL(TYPE, BASE) \
3920 case Decl::TYPE: \
3921 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3922 break;
3923#include "clang/AST/DeclNodes.inc"
3924 }
3925}
3926
3927template<typename DeclT>
3928void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3929 D->RedeclLink.markIncomplete();
3930}
3931
3932void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3933 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3934}
3935
3936void ASTReader::markIncompleteDeclChain(Decl *D) {
3937 switch (D->getKind()) {
3938#define ABSTRACT_DECL(TYPE)
3939#define DECL(TYPE, BASE) \
3940 case Decl::TYPE: \
3941 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3942 break;
3943#include "clang/AST/DeclNodes.inc"
3944 }
3945}
3946
3947/// Read the declaration at the given offset from the AST file.
3948Decl *ASTReader::ReadDeclRecord(GlobalDeclID ID) {
3949 SourceLocation DeclLoc;
3950 RecordLocation Loc = DeclCursorForID(ID, Loc&: DeclLoc);
3951 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3952 // Keep track of where we are in the stream, then jump back there
3953 // after reading this declaration.
3954 SavedStreamPosition SavedPosition(DeclsCursor);
3955
3956 ReadingKindTracker ReadingKind(Read_Decl, *this);
3957
3958 // Note that we are loading a declaration record.
3959 Deserializing ADecl(this);
3960
3961 auto Fail = [](const char *what, llvm::Error &&Err) {
3962 llvm::report_fatal_error(reason: Twine("ASTReader::readDeclRecord failed ") + what +
3963 ": " + toString(E: std::move(Err)));
3964 };
3965
3966 if (llvm::Error JumpFailed = DeclsCursor.JumpToBit(BitNo: Loc.Offset))
3967 Fail("jumping", std::move(JumpFailed));
3968 ASTRecordReader Record(*this, *Loc.F);
3969 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3970 Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
3971 if (!MaybeCode)
3972 Fail("reading code", MaybeCode.takeError());
3973 unsigned Code = MaybeCode.get();
3974
3975 ASTContext &Context = getContext();
3976 Decl *D = nullptr;
3977 Expected<unsigned> MaybeDeclCode = Record.readRecord(Cursor&: DeclsCursor, AbbrevID: Code);
3978 if (!MaybeDeclCode)
3979 llvm::report_fatal_error(
3980 reason: Twine("ASTReader::readDeclRecord failed reading decl code: ") +
3981 toString(E: MaybeDeclCode.takeError()));
3982
3983 switch ((DeclCode)MaybeDeclCode.get()) {
3984 case DECL_CONTEXT_LEXICAL:
3985 case DECL_CONTEXT_VISIBLE:
3986 case DECL_CONTEXT_MODULE_LOCAL_VISIBLE:
3987 case DECL_CONTEXT_TU_LOCAL_VISIBLE:
3988 case DECL_SPECIALIZATIONS:
3989 case DECL_PARTIAL_SPECIALIZATIONS:
3990 llvm_unreachable("Record cannot be de-serialized with readDeclRecord");
3991 case DECL_TYPEDEF:
3992 D = TypedefDecl::CreateDeserialized(C&: Context, ID);
3993 break;
3994 case DECL_TYPEALIAS:
3995 D = TypeAliasDecl::CreateDeserialized(C&: Context, ID);
3996 break;
3997 case DECL_ENUM:
3998 D = EnumDecl::CreateDeserialized(C&: Context, ID);
3999 break;
4000 case DECL_RECORD:
4001 D = RecordDecl::CreateDeserialized(C: Context, ID);
4002 break;
4003 case DECL_ENUM_CONSTANT:
4004 D = EnumConstantDecl::CreateDeserialized(C&: Context, ID);
4005 break;
4006 case DECL_FUNCTION:
4007 D = FunctionDecl::CreateDeserialized(C&: Context, ID);
4008 break;
4009 case DECL_LINKAGE_SPEC:
4010 D = LinkageSpecDecl::CreateDeserialized(C&: Context, ID);
4011 break;
4012 case DECL_EXPORT:
4013 D = ExportDecl::CreateDeserialized(C&: Context, ID);
4014 break;
4015 case DECL_LABEL:
4016 D = LabelDecl::CreateDeserialized(C&: Context, ID);
4017 break;
4018 case DECL_NAMESPACE:
4019 D = NamespaceDecl::CreateDeserialized(C&: Context, ID);
4020 break;
4021 case DECL_NAMESPACE_ALIAS:
4022 D = NamespaceAliasDecl::CreateDeserialized(C&: Context, ID);
4023 break;
4024 case DECL_USING:
4025 D = UsingDecl::CreateDeserialized(C&: Context, ID);
4026 break;
4027 case DECL_USING_PACK:
4028 D = UsingPackDecl::CreateDeserialized(C&: Context, ID, NumExpansions: Record.readInt());
4029 break;
4030 case DECL_USING_SHADOW:
4031 D = UsingShadowDecl::CreateDeserialized(C&: Context, ID);
4032 break;
4033 case DECL_USING_ENUM:
4034 D = UsingEnumDecl::CreateDeserialized(C&: Context, ID);
4035 break;
4036 case DECL_CONSTRUCTOR_USING_SHADOW:
4037 D = ConstructorUsingShadowDecl::CreateDeserialized(C&: Context, ID);
4038 break;
4039 case DECL_USING_DIRECTIVE:
4040 D = UsingDirectiveDecl::CreateDeserialized(C&: Context, ID);
4041 break;
4042 case DECL_UNRESOLVED_USING_VALUE:
4043 D = UnresolvedUsingValueDecl::CreateDeserialized(C&: Context, ID);
4044 break;
4045 case DECL_UNRESOLVED_USING_TYPENAME:
4046 D = UnresolvedUsingTypenameDecl::CreateDeserialized(C&: Context, ID);
4047 break;
4048 case DECL_UNRESOLVED_USING_IF_EXISTS:
4049 D = UnresolvedUsingIfExistsDecl::CreateDeserialized(Ctx&: Context, ID);
4050 break;
4051 case DECL_CXX_RECORD:
4052 D = CXXRecordDecl::CreateDeserialized(C: Context, ID);
4053 break;
4054 case DECL_CXX_DEDUCTION_GUIDE:
4055 D = CXXDeductionGuideDecl::CreateDeserialized(C&: Context, ID);
4056 break;
4057 case DECL_CXX_METHOD:
4058 D = CXXMethodDecl::CreateDeserialized(C&: Context, ID);
4059 break;
4060 case DECL_CXX_CONSTRUCTOR:
4061 D = CXXConstructorDecl::CreateDeserialized(C&: Context, ID, AllocKind: Record.readInt());
4062 break;
4063 case DECL_CXX_DESTRUCTOR:
4064 D = CXXDestructorDecl::CreateDeserialized(C&: Context, ID);
4065 break;
4066 case DECL_CXX_CONVERSION:
4067 D = CXXConversionDecl::CreateDeserialized(C&: Context, ID);
4068 break;
4069 case DECL_ACCESS_SPEC:
4070 D = AccessSpecDecl::CreateDeserialized(C&: Context, ID);
4071 break;
4072 case DECL_FRIEND:
4073 D = FriendDecl::CreateDeserialized(C&: Context, ID, FriendTypeNumTPLists: Record.readInt());
4074 break;
4075 case DECL_FRIEND_TEMPLATE:
4076 D = FriendTemplateDecl::CreateDeserialized(C&: Context, ID);
4077 break;
4078 case DECL_CLASS_TEMPLATE:
4079 D = ClassTemplateDecl::CreateDeserialized(C&: Context, ID);
4080 break;
4081 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
4082 D = ClassTemplateSpecializationDecl::CreateDeserialized(C&: Context, ID);
4083 break;
4084 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
4085 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(C&: Context, ID);
4086 break;
4087 case DECL_VAR_TEMPLATE:
4088 D = VarTemplateDecl::CreateDeserialized(C&: Context, ID);
4089 break;
4090 case DECL_VAR_TEMPLATE_SPECIALIZATION:
4091 D = VarTemplateSpecializationDecl::CreateDeserialized(C&: Context, ID);
4092 break;
4093 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
4094 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(C&: Context, ID);
4095 break;
4096 case DECL_FUNCTION_TEMPLATE:
4097 D = FunctionTemplateDecl::CreateDeserialized(C&: Context, ID);
4098 break;
4099 case DECL_TEMPLATE_TYPE_PARM: {
4100 bool HasTypeConstraint = Record.readInt();
4101 D = TemplateTypeParmDecl::CreateDeserialized(C: Context, ID,
4102 HasTypeConstraint);
4103 break;
4104 }
4105 case DECL_NON_TYPE_TEMPLATE_PARM: {
4106 bool HasTypeConstraint = Record.readInt();
4107 D = NonTypeTemplateParmDecl::CreateDeserialized(C&: Context, ID,
4108 HasTypeConstraint);
4109 break;
4110 }
4111 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK: {
4112 bool HasTypeConstraint = Record.readInt();
4113 D = NonTypeTemplateParmDecl::CreateDeserialized(
4114 C&: Context, ID, NumExpandedTypes: Record.readInt(), HasTypeConstraint);
4115 break;
4116 }
4117 case DECL_TEMPLATE_TEMPLATE_PARM:
4118 D = TemplateTemplateParmDecl::CreateDeserialized(C&: Context, ID);
4119 break;
4120 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
4121 D = TemplateTemplateParmDecl::CreateDeserialized(C&: Context, ID,
4122 NumExpansions: Record.readInt());
4123 break;
4124 case DECL_TYPE_ALIAS_TEMPLATE:
4125 D = TypeAliasTemplateDecl::CreateDeserialized(C&: Context, ID);
4126 break;
4127 case DECL_CONCEPT:
4128 D = ConceptDecl::CreateDeserialized(C&: Context, ID);
4129 break;
4130 case DECL_REQUIRES_EXPR_BODY:
4131 D = RequiresExprBodyDecl::CreateDeserialized(C&: Context, ID);
4132 break;
4133 case DECL_STATIC_ASSERT:
4134 D = StaticAssertDecl::CreateDeserialized(C&: Context, ID);
4135 break;
4136 case DECL_EXPLICIT_INSTANTIATION:
4137 D = ExplicitInstantiationDecl::CreateDeserialized(C&: Context, ID,
4138 TrailingFlags: Record.readInt());
4139 break;
4140 case DECL_OBJC_METHOD:
4141 D = ObjCMethodDecl::CreateDeserialized(C&: Context, ID);
4142 break;
4143 case DECL_OBJC_INTERFACE:
4144 D = ObjCInterfaceDecl::CreateDeserialized(C: Context, ID);
4145 break;
4146 case DECL_OBJC_IVAR:
4147 D = ObjCIvarDecl::CreateDeserialized(C&: Context, ID);
4148 break;
4149 case DECL_OBJC_PROTOCOL:
4150 D = ObjCProtocolDecl::CreateDeserialized(C&: Context, ID);
4151 break;
4152 case DECL_OBJC_AT_DEFS_FIELD:
4153 D = ObjCAtDefsFieldDecl::CreateDeserialized(C&: Context, ID);
4154 break;
4155 case DECL_OBJC_CATEGORY:
4156 D = ObjCCategoryDecl::CreateDeserialized(C&: Context, ID);
4157 break;
4158 case DECL_OBJC_CATEGORY_IMPL:
4159 D = ObjCCategoryImplDecl::CreateDeserialized(C&: Context, ID);
4160 break;
4161 case DECL_OBJC_IMPLEMENTATION:
4162 D = ObjCImplementationDecl::CreateDeserialized(C&: Context, ID);
4163 break;
4164 case DECL_OBJC_COMPATIBLE_ALIAS:
4165 D = ObjCCompatibleAliasDecl::CreateDeserialized(C&: Context, ID);
4166 break;
4167 case DECL_OBJC_PROPERTY:
4168 D = ObjCPropertyDecl::CreateDeserialized(C&: Context, ID);
4169 break;
4170 case DECL_OBJC_PROPERTY_IMPL:
4171 D = ObjCPropertyImplDecl::CreateDeserialized(C&: Context, ID);
4172 break;
4173 case DECL_FIELD:
4174 D = FieldDecl::CreateDeserialized(C&: Context, ID);
4175 break;
4176 case DECL_INDIRECTFIELD:
4177 D = IndirectFieldDecl::CreateDeserialized(C&: Context, ID);
4178 break;
4179 case DECL_VAR:
4180 D = VarDecl::CreateDeserialized(C&: Context, ID);
4181 break;
4182 case DECL_IMPLICIT_PARAM:
4183 D = ImplicitParamDecl::CreateDeserialized(C&: Context, ID);
4184 break;
4185 case DECL_PARM_VAR:
4186 D = ParmVarDecl::CreateDeserialized(C&: Context, ID);
4187 break;
4188 case DECL_DECOMPOSITION:
4189 D = DecompositionDecl::CreateDeserialized(C&: Context, ID, NumBindings: Record.readInt());
4190 break;
4191 case DECL_BINDING:
4192 D = BindingDecl::CreateDeserialized(C&: Context, ID);
4193 break;
4194 case DECL_FILE_SCOPE_ASM:
4195 D = FileScopeAsmDecl::CreateDeserialized(C&: Context, ID);
4196 break;
4197 case DECL_TOP_LEVEL_STMT_DECL:
4198 D = TopLevelStmtDecl::CreateDeserialized(C&: Context, ID);
4199 break;
4200 case DECL_BLOCK:
4201 D = BlockDecl::CreateDeserialized(C&: Context, ID);
4202 break;
4203 case DECL_MS_PROPERTY:
4204 D = MSPropertyDecl::CreateDeserialized(C&: Context, ID);
4205 break;
4206 case DECL_MS_GUID:
4207 D = MSGuidDecl::CreateDeserialized(C&: Context, ID);
4208 break;
4209 case DECL_UNNAMED_GLOBAL_CONSTANT:
4210 D = UnnamedGlobalConstantDecl::CreateDeserialized(C&: Context, ID);
4211 break;
4212 case DECL_TEMPLATE_PARAM_OBJECT:
4213 D = TemplateParamObjectDecl::CreateDeserialized(C&: Context, ID);
4214 break;
4215 case DECL_OUTLINEDFUNCTION:
4216 D = OutlinedFunctionDecl::CreateDeserialized(C&: Context, ID, NumParams: Record.readInt());
4217 break;
4218 case DECL_CAPTURED:
4219 D = CapturedDecl::CreateDeserialized(C&: Context, ID, NumParams: Record.readInt());
4220 break;
4221 case DECL_CXX_BASE_SPECIFIERS:
4222 Error(Msg: "attempt to read a C++ base-specifier record as a declaration");
4223 return nullptr;
4224 case DECL_CXX_CTOR_INITIALIZERS:
4225 Error(Msg: "attempt to read a C++ ctor initializer record as a declaration");
4226 return nullptr;
4227 case DECL_IMPORT:
4228 // Note: last entry of the ImportDecl record is the number of stored source
4229 // locations.
4230 D = ImportDecl::CreateDeserialized(C&: Context, ID, NumLocations: Record.back());
4231 break;
4232 case DECL_OMP_THREADPRIVATE: {
4233 Record.skipInts(N: 1);
4234 unsigned NumChildren = Record.readInt();
4235 Record.skipInts(N: 1);
4236 D = OMPThreadPrivateDecl::CreateDeserialized(C&: Context, ID, N: NumChildren);
4237 break;
4238 }
4239 case DECL_OMP_ALLOCATE: {
4240 unsigned NumClauses = Record.readInt();
4241 unsigned NumVars = Record.readInt();
4242 Record.skipInts(N: 1);
4243 D = OMPAllocateDecl::CreateDeserialized(C&: Context, ID, NVars: NumVars, NClauses: NumClauses);
4244 break;
4245 }
4246 case DECL_OMP_REQUIRES: {
4247 unsigned NumClauses = Record.readInt();
4248 Record.skipInts(N: 2);
4249 D = OMPRequiresDecl::CreateDeserialized(C&: Context, ID, N: NumClauses);
4250 break;
4251 }
4252 case DECL_OMP_DECLARE_REDUCTION:
4253 D = OMPDeclareReductionDecl::CreateDeserialized(C&: Context, ID);
4254 break;
4255 case DECL_OMP_DECLARE_MAPPER: {
4256 unsigned NumClauses = Record.readInt();
4257 Record.skipInts(N: 2);
4258 D = OMPDeclareMapperDecl::CreateDeserialized(C&: Context, ID, N: NumClauses);
4259 break;
4260 }
4261 case DECL_OMP_CAPTUREDEXPR:
4262 D = OMPCapturedExprDecl::CreateDeserialized(C&: Context, ID);
4263 break;
4264 case DECL_PRAGMA_COMMENT:
4265 D = PragmaCommentDecl::CreateDeserialized(C&: Context, ID, ArgSize: Record.readInt());
4266 break;
4267 case DECL_PRAGMA_DETECT_MISMATCH:
4268 D = PragmaDetectMismatchDecl::CreateDeserialized(C&: Context, ID,
4269 NameValueSize: Record.readInt());
4270 break;
4271 case DECL_EMPTY:
4272 D = EmptyDecl::CreateDeserialized(C&: Context, ID);
4273 break;
4274 case DECL_LIFETIME_EXTENDED_TEMPORARY:
4275 D = LifetimeExtendedTemporaryDecl::CreateDeserialized(C&: Context, ID);
4276 break;
4277 case DECL_OBJC_TYPE_PARAM:
4278 D = ObjCTypeParamDecl::CreateDeserialized(ctx&: Context, ID);
4279 break;
4280 case DECL_HLSL_BUFFER:
4281 D = HLSLBufferDecl::CreateDeserialized(C&: Context, ID);
4282 break;
4283 case DECL_IMPLICIT_CONCEPT_SPECIALIZATION:
4284 D = ImplicitConceptSpecializationDecl::CreateDeserialized(C: Context, ID,
4285 NumTemplateArgs: Record.readInt());
4286 break;
4287 case DECL_OPENACC_DECLARE:
4288 D = OpenACCDeclareDecl::CreateDeserialized(Ctx&: Context, ID, NumClauses: Record.readInt());
4289 break;
4290 case DECL_OPENACC_ROUTINE:
4291 D = OpenACCRoutineDecl::CreateDeserialized(Ctx&: Context, ID, NumClauses: Record.readInt());
4292 break;
4293 }
4294
4295 assert(D && "Unknown declaration reading AST file");
4296 LoadedDecl(Index: translateGlobalDeclIDToIndex(ID), D);
4297 // Set the DeclContext before doing any deserialization, to make sure internal
4298 // calls to Decl::getASTContext() by Decl's methods will find the
4299 // TranslationUnitDecl without crashing.
4300 D->setDeclContext(Context.getTranslationUnitDecl());
4301
4302 // Reading some declarations can result in deep recursion.
4303 runWithSufficientStackSpace(Loc: DeclLoc, Fn: [&] { Reader.Visit(D); });
4304
4305 // If this declaration is also a declaration context, get the
4306 // offsets for its tables of lexical and visible declarations.
4307 if (auto *DC = dyn_cast<DeclContext>(Val: D)) {
4308 LookupBlockOffsets Offsets;
4309
4310 Reader.VisitDeclContext(DC, Offsets);
4311
4312 // Get the lexical and visible block for the delayed namespace.
4313 // It is sufficient to judge if ID is in DelayedNamespaceOffsetMap.
4314 // But it may be more efficient to filter the other cases.
4315 if (!Offsets && isa<NamespaceDecl>(Val: D))
4316 if (auto Iter = DelayedNamespaceOffsetMap.find(Val: ID);
4317 Iter != DelayedNamespaceOffsetMap.end())
4318 Offsets = Iter->second;
4319
4320 if (Offsets.VisibleOffset &&
4321 ReadVisibleDeclContextStorage(
4322 M&: *Loc.F, Cursor&: DeclsCursor, Offset: Offsets.VisibleOffset, ID,
4323 VisibleKind: VisibleDeclContextStorageKind::GenerallyVisible))
4324 return nullptr;
4325 if (Offsets.ModuleLocalOffset &&
4326 ReadVisibleDeclContextStorage(
4327 M&: *Loc.F, Cursor&: DeclsCursor, Offset: Offsets.ModuleLocalOffset, ID,
4328 VisibleKind: VisibleDeclContextStorageKind::ModuleLocalVisible))
4329 return nullptr;
4330 if (Offsets.TULocalOffset &&
4331 ReadVisibleDeclContextStorage(
4332 M&: *Loc.F, Cursor&: DeclsCursor, Offset: Offsets.TULocalOffset, ID,
4333 VisibleKind: VisibleDeclContextStorageKind::TULocalVisible))
4334 return nullptr;
4335
4336 if (Offsets.LexicalOffset &&
4337 ReadLexicalDeclContextStorage(M&: *Loc.F, Cursor&: DeclsCursor,
4338 Offset: Offsets.LexicalOffset, DC))
4339 return nullptr;
4340 }
4341 assert(Record.getIdx() == Record.size());
4342
4343 // Load any relevant update records.
4344 PendingUpdateRecords.push_back(
4345 Elt: PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
4346
4347 // Load the categories after recursive loading is finished.
4348 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(Val: D))
4349 // If we already have a definition when deserializing the ObjCInterfaceDecl,
4350 // we put the Decl in PendingDefinitions so we can pull the categories here.
4351 if (Class->isThisDeclarationADefinition() ||
4352 PendingDefinitions.count(Ptr: Class))
4353 loadObjCCategories(ID, D: Class);
4354
4355 // If we have deserialized a declaration that has a definition the
4356 // AST consumer might need to know about, queue it.
4357 // We don't pass it to the consumer immediately because we may be in recursive
4358 // loading, and some declarations may still be initializing.
4359 PotentiallyInterestingDecls.push_back(x: D);
4360
4361 return D;
4362}
4363
4364void ASTReader::PassInterestingDeclsToConsumer() {
4365 assert(Consumer);
4366
4367 if (!CanPassDeclsToConsumer)
4368 return;
4369
4370 // Guard variable to avoid recursively redoing the process of passing
4371 // decls to consumer.
4372 SaveAndRestore GuardPassingDeclsToConsumer(CanPassDeclsToConsumer,
4373 /*NewValue=*/false);
4374
4375 // Ensure that we've loaded all potentially-interesting declarations
4376 // that need to be eagerly loaded.
4377 for (auto ID : EagerlyDeserializedDecls)
4378 GetDecl(ID);
4379 EagerlyDeserializedDecls.clear();
4380
4381 auto ConsumingPotentialInterestingDecls = [this]() {
4382 while (!PotentiallyInterestingDecls.empty()) {
4383 Decl *D = PotentiallyInterestingDecls.front();
4384 PotentiallyInterestingDecls.pop_front();
4385 if (isConsumerInterestedIn(D))
4386 PassInterestingDeclToConsumer(D);
4387 }
4388 };
4389 std::deque<Decl *> MaybeInterestingDecls =
4390 std::move(PotentiallyInterestingDecls);
4391 PotentiallyInterestingDecls.clear();
4392 assert(PotentiallyInterestingDecls.empty());
4393 while (!MaybeInterestingDecls.empty()) {
4394 Decl *D = MaybeInterestingDecls.front();
4395 MaybeInterestingDecls.pop_front();
4396 // Since we load the variable's initializers lazily, it'd be problematic
4397 // if the initializers dependent on each other. So here we try to load the
4398 // initializers of static variables to make sure they are passed to code
4399 // generator by order. If we read anything interesting, we would consume
4400 // that before emitting the current declaration.
4401 if (auto *VD = dyn_cast<VarDecl>(Val: D);
4402 VD && VD->isFileVarDecl() && !VD->isExternallyVisible())
4403 VD->getInit();
4404 ConsumingPotentialInterestingDecls();
4405 if (isConsumerInterestedIn(D))
4406 PassInterestingDeclToConsumer(D);
4407 }
4408
4409 // If we add any new potential interesting decl in the last call, consume it.
4410 ConsumingPotentialInterestingDecls();
4411
4412 for (GlobalDeclID ID : VTablesToEmit) {
4413 auto *RD = cast<CXXRecordDecl>(Val: GetDecl(ID));
4414 assert(!RD->shouldEmitInExternalSource());
4415 PassVTableToConsumer(RD);
4416 }
4417 VTablesToEmit.clear();
4418}
4419
4420void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
4421 // The declaration may have been modified by files later in the chain.
4422 // If this is the case, read the record containing the updates from each file
4423 // and pass it to ASTDeclReader to make the modifications.
4424 GlobalDeclID ID = Record.ID;
4425 Decl *D = Record.D;
4426 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
4427 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(Val: ID);
4428
4429 if (UpdI != DeclUpdateOffsets.end()) {
4430 auto UpdateOffsets = std::move(UpdI->second);
4431 DeclUpdateOffsets.erase(I: UpdI);
4432
4433 // Check if this decl was interesting to the consumer. If we just loaded
4434 // the declaration, then we know it was interesting and we skip the call
4435 // to isConsumerInterestedIn because it is unsafe to call in the
4436 // current ASTReader state.
4437 bool WasInteresting = Record.JustLoaded || isConsumerInterestedIn(D);
4438 for (auto &FileAndOffset : UpdateOffsets) {
4439 ModuleFile *F = FileAndOffset.first;
4440 uint64_t Offset = FileAndOffset.second;
4441 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
4442 SavedStreamPosition SavedPosition(Cursor);
4443 if (llvm::Error JumpFailed = Cursor.JumpToBit(BitNo: Offset))
4444 // FIXME don't do a fatal error.
4445 llvm::report_fatal_error(
4446 reason: Twine("ASTReader::loadDeclUpdateRecords failed jumping: ") +
4447 toString(E: std::move(JumpFailed)));
4448 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4449 if (!MaybeCode)
4450 llvm::report_fatal_error(
4451 reason: Twine("ASTReader::loadDeclUpdateRecords failed reading code: ") +
4452 toString(E: MaybeCode.takeError()));
4453 unsigned Code = MaybeCode.get();
4454 ASTRecordReader Record(*this, *F);
4455 if (Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, AbbrevID: Code))
4456 assert(MaybeRecCode.get() == DECL_UPDATES &&
4457 "Expected DECL_UPDATES record!");
4458 else
4459 llvm::report_fatal_error(
4460 reason: Twine("ASTReader::loadDeclUpdateRecords failed reading rec code: ") +
4461 toString(E: MaybeCode.takeError()));
4462
4463 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4464 SourceLocation());
4465 Reader.UpdateDecl(D);
4466
4467 // We might have made this declaration interesting. If so, remember that
4468 // we need to hand it off to the consumer.
4469 if (!WasInteresting && isConsumerInterestedIn(D)) {
4470 PotentiallyInterestingDecls.push_back(x: D);
4471 WasInteresting = true;
4472 }
4473 }
4474 }
4475
4476 // Load the pending visible updates for this decl context, if it has any.
4477 if (auto I = PendingVisibleUpdates.find(Val: ID);
4478 I != PendingVisibleUpdates.end()) {
4479 auto VisibleUpdates = std::move(I->second);
4480 PendingVisibleUpdates.erase(I);
4481
4482 auto *DC = cast<DeclContext>(Val: D)->getPrimaryContext();
4483 for (const auto &Update : VisibleUpdates)
4484 Lookups[DC].Table.add(
4485 File: Update.Mod, Data: Update.Data,
4486 InfoObj: reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4487 DC->setHasExternalVisibleStorage(true);
4488 }
4489
4490 if (auto I = PendingModuleLocalVisibleUpdates.find(Val: ID);
4491 I != PendingModuleLocalVisibleUpdates.end()) {
4492 auto ModuleLocalVisibleUpdates = std::move(I->second);
4493 PendingModuleLocalVisibleUpdates.erase(I);
4494
4495 auto *DC = cast<DeclContext>(Val: D)->getPrimaryContext();
4496 for (const auto &Update : ModuleLocalVisibleUpdates)
4497 ModuleLocalLookups[DC].Table.add(
4498 File: Update.Mod, Data: Update.Data,
4499 InfoObj: reader::ModuleLocalNameLookupTrait(*this, *Update.Mod));
4500 // NOTE: Can we optimize the case that the data being loaded
4501 // is not related to current module?
4502 DC->setHasExternalVisibleStorage(true);
4503 }
4504
4505 if (auto I = TULocalUpdates.find(Val: ID); I != TULocalUpdates.end()) {
4506 auto Updates = std::move(I->second);
4507 TULocalUpdates.erase(I);
4508
4509 auto *DC = cast<DeclContext>(Val: D)->getPrimaryContext();
4510 for (const auto &Update : Updates)
4511 TULocalLookups[DC].Table.add(
4512 File: Update.Mod, Data: Update.Data,
4513 InfoObj: reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4514 DC->setHasExternalVisibleStorage(true);
4515 }
4516
4517 // Load any pending related decls.
4518 if (D->isCanonicalDecl()) {
4519 if (auto IT = RelatedDeclsMap.find(Val: ID); IT != RelatedDeclsMap.end()) {
4520 for (auto LID : IT->second)
4521 GetDecl(ID: LID);
4522 RelatedDeclsMap.erase(I: IT);
4523 }
4524 }
4525
4526 // Load the pending specializations update for this decl, if it has any.
4527 if (auto I = PendingSpecializationsUpdates.find(Val: ID);
4528 I != PendingSpecializationsUpdates.end()) {
4529 auto SpecializationUpdates = std::move(I->second);
4530 PendingSpecializationsUpdates.erase(I);
4531
4532 for (const auto &Update : SpecializationUpdates)
4533 AddSpecializations(D, Data: Update.Data, M&: *Update.Mod, /*IsPartial=*/false);
4534 }
4535
4536 // Load the pending specializations update for this decl, if it has any.
4537 if (auto I = PendingPartialSpecializationsUpdates.find(Val: ID);
4538 I != PendingPartialSpecializationsUpdates.end()) {
4539 auto SpecializationUpdates = std::move(I->second);
4540 PendingPartialSpecializationsUpdates.erase(I);
4541
4542 for (const auto &Update : SpecializationUpdates)
4543 AddSpecializations(D, Data: Update.Data, M&: *Update.Mod, /*IsPartial=*/true);
4544 }
4545}
4546
4547void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4548 // Attach FirstLocal to the end of the decl chain.
4549 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4550 if (FirstLocal != CanonDecl) {
4551 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(D: CanonDecl);
4552 ASTDeclReader::attachPreviousDecl(
4553 Reader&: *this, D: FirstLocal, Previous: PrevMostRecent ? PrevMostRecent : CanonDecl,
4554 Canon: CanonDecl);
4555 }
4556
4557 if (!LocalOffset) {
4558 ASTDeclReader::attachLatestDecl(D: CanonDecl, Latest: FirstLocal);
4559 return;
4560 }
4561
4562 // Load the list of other redeclarations from this module file.
4563 ModuleFile *M = getOwningModuleFile(D: FirstLocal);
4564 assert(M && "imported decl from no module file");
4565
4566 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4567 SavedStreamPosition SavedPosition(Cursor);
4568 if (llvm::Error JumpFailed = Cursor.JumpToBit(BitNo: LocalOffset))
4569 llvm::report_fatal_error(
4570 reason: Twine("ASTReader::loadPendingDeclChain failed jumping: ") +
4571 toString(E: std::move(JumpFailed)));
4572
4573 RecordData Record;
4574 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4575 if (!MaybeCode)
4576 llvm::report_fatal_error(
4577 reason: Twine("ASTReader::loadPendingDeclChain failed reading code: ") +
4578 toString(E: MaybeCode.takeError()));
4579 unsigned Code = MaybeCode.get();
4580 if (Expected<unsigned> MaybeRecCode = Cursor.readRecord(AbbrevID: Code, Vals&: Record))
4581 assert(MaybeRecCode.get() == LOCAL_REDECLARATIONS &&
4582 "expected LOCAL_REDECLARATIONS record!");
4583 else
4584 llvm::report_fatal_error(
4585 reason: Twine("ASTReader::loadPendingDeclChain failed reading rec code: ") +
4586 toString(E: MaybeCode.takeError()));
4587
4588 // FIXME: We have several different dispatches on decl kind here; maybe
4589 // we should instead generate one loop per kind and dispatch up-front?
4590 Decl *MostRecent = FirstLocal;
4591 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4592 unsigned Idx = N - I - 1;
4593 auto *D = ReadDecl(F&: *M, R: Record, I&: Idx);
4594 ASTDeclReader::attachPreviousDecl(Reader&: *this, D, Previous: MostRecent, Canon: CanonDecl);
4595 MostRecent = D;
4596 }
4597 ASTDeclReader::attachLatestDecl(D: CanonDecl, Latest: MostRecent);
4598}
4599
4600namespace {
4601
4602 /// Given an ObjC interface, goes through the modules and links to the
4603 /// interface all the categories for it.
4604 class ObjCCategoriesVisitor {
4605 ASTReader &Reader;
4606 ObjCInterfaceDecl *Interface;
4607 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4608 ObjCCategoryDecl *Tail = nullptr;
4609 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4610 GlobalDeclID InterfaceID;
4611 unsigned PreviousGeneration;
4612
4613 void add(ObjCCategoryDecl *Cat) {
4614 // Only process each category once.
4615 if (!Deserialized.erase(Ptr: Cat))
4616 return;
4617
4618 // Check for duplicate categories.
4619 if (Cat->getDeclName()) {
4620 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4621 if (Existing && Reader.getOwningModuleFile(D: Existing) !=
4622 Reader.getOwningModuleFile(D: Cat)) {
4623 StructuralEquivalenceContext::NonEquivalentDeclSet NonEquivalentDecls;
4624 StructuralEquivalenceContext Ctx(
4625 Reader.getContext().getLangOpts(), Cat->getASTContext(),
4626 Existing->getASTContext(), NonEquivalentDecls,
4627 StructuralEquivalenceKind::Default,
4628 /*StrictTypeSpelling=*/false,
4629 /*Complain=*/false,
4630 /*ErrorOnTagTypeMismatch=*/true);
4631 if (!Ctx.IsEquivalent(D1: Cat, D2: Existing)) {
4632 // Warn only if the categories with the same name are different.
4633 Reader.Diag(Loc: Cat->getLocation(), DiagID: diag::warn_dup_category_def)
4634 << Interface->getDeclName() << Cat->getDeclName();
4635 Reader.Diag(Loc: Existing->getLocation(),
4636 DiagID: diag::note_previous_definition);
4637 }
4638 } else if (!Existing) {
4639 // Record this category.
4640 Existing = Cat;
4641 }
4642 }
4643
4644 // Add this category to the end of the chain.
4645 if (Tail)
4646 ASTDeclReader::setNextObjCCategory(Cat: Tail, Next: Cat);
4647 else
4648 Interface->setCategoryListRaw(Cat);
4649 Tail = Cat;
4650 }
4651
4652 public:
4653 ObjCCategoriesVisitor(
4654 ASTReader &Reader, ObjCInterfaceDecl *Interface,
4655 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4656 GlobalDeclID InterfaceID, unsigned PreviousGeneration)
4657 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4658 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4659 // Populate the name -> category map with the set of known categories.
4660 for (auto *Cat : Interface->known_categories()) {
4661 if (Cat->getDeclName())
4662 NameCategoryMap[Cat->getDeclName()] = Cat;
4663
4664 // Keep track of the tail of the category list.
4665 Tail = Cat;
4666 }
4667 }
4668
4669 bool operator()(ModuleFile &M) {
4670 // If we've loaded all of the category information we care about from
4671 // this module file, we're done.
4672 if (M.Generation <= PreviousGeneration)
4673 return true;
4674
4675 // Map global ID of the definition down to the local ID used in this
4676 // module file. If there is no such mapping, we'll find nothing here
4677 // (or in any module it imports).
4678 LocalDeclID LocalID =
4679 Reader.mapGlobalIDToModuleFileGlobalID(M, GlobalID: InterfaceID);
4680 if (LocalID.isInvalid())
4681 return true;
4682
4683 // Perform a binary search to find the local redeclarations for this
4684 // declaration (if any).
4685 const ObjCCategoriesInfo Compare = {LocalID, 0};
4686 const ObjCCategoriesInfo *Result = std::lower_bound(
4687 first: M.ObjCCategoriesMap,
4688 last: M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap, val: Compare);
4689 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4690 LocalID != Result->getDefinitionID()) {
4691 // We didn't find anything. If the class definition is in this module
4692 // file, then the module files it depends on cannot have any categories,
4693 // so suppress further lookup.
4694 return Reader.isDeclIDFromModule(ID: InterfaceID, M);
4695 }
4696
4697 // We found something. Dig out all of the categories.
4698 unsigned Offset = Result->Offset;
4699 unsigned N = M.ObjCCategories[Offset];
4700 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4701 for (unsigned I = 0; I != N; ++I)
4702 add(Cat: Reader.ReadDeclAs<ObjCCategoryDecl>(F&: M, R: M.ObjCCategories, I&: Offset));
4703 return true;
4704 }
4705 };
4706
4707} // namespace
4708
4709void ASTReader::loadObjCCategories(GlobalDeclID ID, ObjCInterfaceDecl *D,
4710 unsigned PreviousGeneration) {
4711 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4712 PreviousGeneration);
4713 ModuleMgr.visit(Visitor);
4714}
4715
4716template<typename DeclT, typename Fn>
4717static void forAllLaterRedecls(DeclT *D, Fn F) {
4718 F(D);
4719
4720 // Check whether we've already merged D into its redeclaration chain.
4721 // MostRecent may or may not be nullptr if D has not been merged. If
4722 // not, walk the merged redecl chain and see if it's there.
4723 auto *MostRecent = D->getMostRecentDecl();
4724 bool Found = false;
4725 for (auto *Redecl = MostRecent; Redecl && !Found;
4726 Redecl = Redecl->getPreviousDecl())
4727 Found = (Redecl == D);
4728
4729 // If this declaration is merged, apply the functor to all later decls.
4730 if (Found) {
4731 for (auto *Redecl = MostRecent; Redecl != D;
4732 Redecl = Redecl->getPreviousDecl())
4733 F(Redecl);
4734 }
4735}
4736
4737void ASTDeclReader::UpdateDecl(Decl *D) {
4738 while (Record.getIdx() < Record.size()) {
4739 switch ((DeclUpdateKind)Record.readInt()) {
4740 case DeclUpdateKind::CXXAddedImplicitMember: {
4741 auto *RD = cast<CXXRecordDecl>(Val: D);
4742 Decl *MD = Record.readDecl();
4743 assert(MD && "couldn't read decl from update record");
4744 Reader.PendingAddedClassMembers.push_back(Elt: {RD, MD});
4745 break;
4746 }
4747
4748 case DeclUpdateKind::CXXAddedAnonymousNamespace: {
4749 auto *Anon = readDeclAs<NamespaceDecl>();
4750
4751 // Each module has its own anonymous namespace, which is disjoint from
4752 // any other module's anonymous namespaces, so don't attach the anonymous
4753 // namespace at all.
4754 if (!Record.isModule()) {
4755 if (auto *TU = dyn_cast<TranslationUnitDecl>(Val: D))
4756 TU->setAnonymousNamespace(Anon);
4757 else
4758 cast<NamespaceDecl>(Val: D)->setAnonymousNamespace(Anon);
4759 }
4760 break;
4761 }
4762
4763 case DeclUpdateKind::CXXAddedVarDefinition: {
4764 auto *VD = cast<VarDecl>(Val: D);
4765 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4766 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4767 ReadVarDeclInit(VD);
4768 break;
4769 }
4770
4771 case DeclUpdateKind::CXXPointOfInstantiation: {
4772 SourceLocation POI = Record.readSourceLocation();
4773 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(Val: D)) {
4774 VTSD->setPointOfInstantiation(POI);
4775 } else if (auto *VD = dyn_cast<VarDecl>(Val: D)) {
4776 MemberSpecializationInfo *MSInfo = VD->getMemberSpecializationInfo();
4777 assert(MSInfo && "No member specialization information");
4778 MSInfo->setPointOfInstantiation(POI);
4779 } else {
4780 auto *FD = cast<FunctionDecl>(Val: D);
4781 if (auto *FTSInfo = dyn_cast<FunctionTemplateSpecializationInfo *>(
4782 Val&: FD->TemplateOrSpecialization))
4783 FTSInfo->setPointOfInstantiation(POI);
4784 else
4785 cast<MemberSpecializationInfo *>(Val&: FD->TemplateOrSpecialization)
4786 ->setPointOfInstantiation(POI);
4787 }
4788 break;
4789 }
4790
4791 case DeclUpdateKind::CXXInstantiatedDefaultArgument: {
4792 auto *Param = cast<ParmVarDecl>(Val: D);
4793
4794 // We have to read the default argument regardless of whether we use it
4795 // so that hypothetical further update records aren't messed up.
4796 // TODO: Add a function to skip over the next expr record.
4797 auto *DefaultArg = Record.readExpr();
4798
4799 // Only apply the update if the parameter still has an uninstantiated
4800 // default argument.
4801 if (Param->hasUninstantiatedDefaultArg())
4802 Param->setDefaultArg(DefaultArg);
4803 break;
4804 }
4805
4806 case DeclUpdateKind::CXXInstantiatedDefaultMemberInitializer: {
4807 auto *FD = cast<FieldDecl>(Val: D);
4808 auto *DefaultInit = Record.readExpr();
4809
4810 // Only apply the update if the field still has an uninstantiated
4811 // default member initializer.
4812 if (FD->hasInClassInitializer() && !FD->hasNonNullInClassInitializer()) {
4813 if (DefaultInit)
4814 FD->setInClassInitializer(DefaultInit);
4815 else
4816 // Instantiation failed. We can get here if we serialized an AST for
4817 // an invalid program.
4818 FD->removeInClassInitializer();
4819 }
4820 break;
4821 }
4822
4823 case DeclUpdateKind::CXXAddedFunctionDefinition: {
4824 auto *FD = cast<FunctionDecl>(Val: D);
4825 if (Reader.PendingBodies[FD]) {
4826 // FIXME: Maybe check for ODR violations.
4827 // It's safe to stop now because this update record is always last.
4828 return;
4829 }
4830
4831 if (Record.readInt()) {
4832 // Maintain AST consistency: any later redeclarations of this function
4833 // are inline if this one is. (We might have merged another declaration
4834 // into this one.)
4835 forAllLaterRedecls(D: FD, F: [](FunctionDecl *FD) {
4836 FD->setImplicitlyInline();
4837 });
4838 }
4839 FD->setInnerLocStart(readSourceLocation());
4840 ReadFunctionDefinition(FD);
4841 assert(Record.getIdx() == Record.size() && "lazy body must be last");
4842 break;
4843 }
4844
4845 case DeclUpdateKind::CXXInstantiatedClassDefinition: {
4846 auto *RD = cast<CXXRecordDecl>(Val: D);
4847 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4848 bool HadRealDefinition =
4849 OldDD && (OldDD->Definition != RD ||
4850 !Reader.PendingFakeDefinitionData.count(Val: OldDD));
4851 RD->setParamDestroyedInCallee(Record.readInt());
4852 RD->setArgPassingRestrictions(
4853 static_cast<RecordArgPassingKind>(Record.readInt()));
4854 ReadCXXRecordDefinition(D: RD, /*Update*/true);
4855
4856 // Visible update is handled separately.
4857 uint64_t LexicalOffset = ReadLocalOffset();
4858 if (!HadRealDefinition && LexicalOffset) {
4859 Record.readLexicalDeclContextStorage(Offset: LexicalOffset, DC: RD);
4860 Reader.PendingFakeDefinitionData.erase(Val: OldDD);
4861 }
4862
4863 auto TSK = (TemplateSpecializationKind)Record.readInt();
4864 SourceLocation POI = readSourceLocation();
4865 if (MemberSpecializationInfo *MSInfo =
4866 RD->getMemberSpecializationInfo()) {
4867 MSInfo->setTemplateSpecializationKind(TSK);
4868 MSInfo->setPointOfInstantiation(POI);
4869 } else {
4870 auto *Spec = cast<ClassTemplateSpecializationDecl>(Val: RD);
4871 Spec->setTemplateSpecializationKind(TSK);
4872 Spec->setPointOfInstantiation(POI);
4873
4874 if (Record.readInt()) {
4875 auto *PartialSpec =
4876 readDeclAs<ClassTemplatePartialSpecializationDecl>();
4877 SmallVector<TemplateArgument, 8> TemplArgs;
4878 Record.readTemplateArgumentList(TemplArgs);
4879 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4880 Context&: Reader.getContext(), Args: TemplArgs);
4881
4882 // FIXME: If we already have a partial specialization set,
4883 // check that it matches.
4884 if (!isa<ClassTemplatePartialSpecializationDecl *>(
4885 Val: Spec->getSpecializedTemplateOrPartial()))
4886 Spec->setInstantiationOf(PartialSpec, TemplateArgs: TemplArgList);
4887 }
4888 }
4889
4890 RD->setTagKind(static_cast<TagTypeKind>(Record.readInt()));
4891 RD->setLocation(readSourceLocation());
4892 RD->setLocStart(readSourceLocation());
4893 RD->setBraceRange(readSourceRange());
4894
4895 if (Record.readInt()) {
4896 AttrVec Attrs;
4897 Record.readAttributes(Attrs);
4898 // If the declaration already has attributes, we assume that some other
4899 // AST file already loaded them.
4900 if (!D->hasAttrs())
4901 D->setAttrsImpl(Attrs, Ctx&: Reader.getContext());
4902 }
4903 break;
4904 }
4905
4906 case DeclUpdateKind::CXXResolvedDtorDelete: {
4907 // Set the 'operator delete' directly to avoid emitting another update
4908 // record.
4909 CXXDestructorDecl *Canon = cast<CXXDestructorDecl>(Val: D->getCanonicalDecl());
4910 ASTContext &C = Reader.getContext();
4911 auto *Del = readDeclAs<FunctionDecl>();
4912 auto *ThisArg = Record.readExpr();
4913 auto *Dtor = cast<CXXDestructorDecl>(Val: D);
4914 // FIXME: Check consistency if we have an old and new operator delete.
4915 if (!C.dtorHasOperatorDelete(Dtor,
4916 K: ASTContext::OperatorDeleteKind::Regular)) {
4917 C.addOperatorDeleteForVDtor(Dtor, OperatorDelete: Del,
4918 K: ASTContext::OperatorDeleteKind::Regular);
4919 Canon->OperatorDeleteThisArg = ThisArg;
4920 }
4921 break;
4922 }
4923
4924 case DeclUpdateKind::CXXResolvedDtorGlobDelete: {
4925 auto *Del = readDeclAs<FunctionDecl>();
4926 auto *Dtor = cast<CXXDestructorDecl>(Val: D);
4927 ASTContext &C = Reader.getContext();
4928 if (!C.dtorHasOperatorDelete(
4929 Dtor, K: ASTContext::OperatorDeleteKind::GlobalRegular))
4930 C.addOperatorDeleteForVDtor(
4931 Dtor, OperatorDelete: Del, K: ASTContext::OperatorDeleteKind::GlobalRegular);
4932 break;
4933 }
4934 case DeclUpdateKind::CXXResolvedDtorArrayDelete: {
4935 auto *Del = readDeclAs<FunctionDecl>();
4936 auto *Dtor = cast<CXXDestructorDecl>(Val: D);
4937 ASTContext &C = Reader.getContext();
4938 if (!C.dtorHasOperatorDelete(Dtor, K: ASTContext::OperatorDeleteKind::Array))
4939 C.addOperatorDeleteForVDtor(Dtor, OperatorDelete: Del,
4940 K: ASTContext::OperatorDeleteKind::Array);
4941 break;
4942 }
4943 case DeclUpdateKind::CXXResolvedDtorGlobArrayDelete: {
4944 auto *Del = readDeclAs<FunctionDecl>();
4945 auto *Dtor = cast<CXXDestructorDecl>(Val: D);
4946 ASTContext &C = Reader.getContext();
4947 if (!C.dtorHasOperatorDelete(Dtor,
4948 K: ASTContext::OperatorDeleteKind::ArrayGlobal))
4949 C.addOperatorDeleteForVDtor(
4950 Dtor, OperatorDelete: Del, K: ASTContext::OperatorDeleteKind::ArrayGlobal);
4951 break;
4952 }
4953
4954 case DeclUpdateKind::CXXResolvedExceptionSpec: {
4955 SmallVector<QualType, 8> ExceptionStorage;
4956 auto ESI = Record.readExceptionSpecInfo(buffer&: ExceptionStorage);
4957
4958 // Update this declaration's exception specification, if needed.
4959 auto *FD = cast<FunctionDecl>(Val: D);
4960 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4961 // FIXME: If the exception specification is already present, check that it
4962 // matches.
4963 if (isUnresolvedExceptionSpec(ESpecType: FPT->getExceptionSpecType())) {
4964 FD->setType(Reader.getContext().getFunctionType(
4965 ResultTy: FPT->getReturnType(), Args: FPT->getParamTypes(),
4966 EPI: FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4967
4968 // When we get to the end of deserializing, see if there are other decls
4969 // that we need to propagate this exception specification onto.
4970 Reader.PendingExceptionSpecUpdates.insert(
4971 KV: std::make_pair(x: FD->getCanonicalDecl(), y&: FD));
4972 }
4973 break;
4974 }
4975
4976 case DeclUpdateKind::CXXDeducedReturnType: {
4977 auto *FD = cast<FunctionDecl>(Val: D);
4978 QualType DeducedResultType = Record.readType();
4979 Reader.PendingDeducedTypeUpdates.insert(
4980 KV: {FD->getCanonicalDecl(), DeducedResultType});
4981 break;
4982 }
4983
4984 case DeclUpdateKind::DeclMarkedUsed:
4985 // Maintain AST consistency: any later redeclarations are used too.
4986 D->markUsed(C&: Reader.getContext());
4987 break;
4988
4989 case DeclUpdateKind::ManglingNumber:
4990 Reader.getContext().setManglingNumber(ND: cast<NamedDecl>(Val: D),
4991 Number: Record.readInt());
4992 break;
4993
4994 case DeclUpdateKind::StaticLocalNumber:
4995 Reader.getContext().setStaticLocalNumber(VD: cast<VarDecl>(Val: D),
4996 Number: Record.readInt());
4997 break;
4998
4999 case DeclUpdateKind::DeclMarkedOpenMPThreadPrivate:
5000 D->addAttr(A: OMPThreadPrivateDeclAttr::CreateImplicit(Ctx&: Reader.getContext(),
5001 Range: readSourceRange()));
5002 break;
5003
5004 case DeclUpdateKind::DeclMarkedOpenMPAllocate: {
5005 auto AllocatorKind =
5006 static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
5007 Expr *Allocator = Record.readExpr();
5008 Expr *Alignment = Record.readExpr();
5009 SourceRange SR = readSourceRange();
5010 D->addAttr(A: OMPAllocateDeclAttr::CreateImplicit(
5011 Ctx&: Reader.getContext(), AllocatorType: AllocatorKind, Allocator, Alignment, Range: SR));
5012 break;
5013 }
5014
5015 case DeclUpdateKind::DeclMarkedOpenMPIndirectCall:
5016 D->addAttr(A: OMPTargetIndirectCallAttr::CreateImplicit(Ctx&: Reader.getContext(),
5017 Range: readSourceRange()));
5018 break;
5019
5020 case DeclUpdateKind::DeclExported: {
5021 unsigned SubmoduleID = readSubmoduleID();
5022 auto *Exported = cast<NamedDecl>(Val: D);
5023 Module *Owner = SubmoduleID ? Reader.getSubmodule(GlobalID: SubmoduleID) : nullptr;
5024 Reader.getContext().mergeDefinitionIntoModule(ND: Exported, M: Owner);
5025 Reader.PendingMergedDefinitionsToDeduplicate.insert(X: Exported);
5026 break;
5027 }
5028
5029 case DeclUpdateKind::DeclMarkedOpenMPDeclareTarget: {
5030 auto MapType = Record.readEnum<OMPDeclareTargetDeclAttr::MapTypeTy>();
5031 auto DevType = Record.readEnum<OMPDeclareTargetDeclAttr::DevTypeTy>();
5032 Expr *IndirectE = Record.readExpr();
5033 bool Indirect = Record.readBool();
5034 unsigned Level = Record.readInt();
5035 D->addAttr(A: OMPDeclareTargetDeclAttr::CreateImplicit(
5036 Ctx&: Reader.getContext(), MapType, DevType, IndirectExpr: IndirectE, Indirect, Level,
5037 Range: readSourceRange()));
5038 break;
5039 }
5040
5041 case DeclUpdateKind::AddedAttrToRecord:
5042 AttrVec Attrs;
5043 Record.readAttributes(Attrs);
5044 assert(Attrs.size() == 1);
5045 D->addAttr(A: Attrs[0]);
5046 break;
5047 }
5048 }
5049}
5050