1 //===--- ASTReaderDecl.cpp - Decl Deserialization ---------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the ASTReader::ReadDeclRecord method, which is the
11 // entrypoint for loading a decl.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "clang/Serialization/ASTReader.h"
16 #include "ASTCommon.h"
17 #include "ASTReaderInternals.h"
18 #include "clang/AST/ASTConsumer.h"
19 #include "clang/AST/ASTContext.h"
20 #include "clang/AST/DeclCXX.h"
21 #include "clang/AST/DeclGroup.h"
22 #include "clang/AST/DeclTemplate.h"
23 #include "clang/AST/DeclVisitor.h"
24 #include "clang/AST/Expr.h"
25 #include "clang/Sema/IdentifierResolver.h"
26 #include "clang/Sema/Sema.h"
27 #include "clang/Sema/SemaDiagnostic.h"
28 #include "llvm/Support/SaveAndRestore.h"
29
30 using namespace clang;
31 using namespace clang::serialization;
32
33 //===----------------------------------------------------------------------===//
34 // Declaration deserialization
35 //===----------------------------------------------------------------------===//
36
37 namespace clang {
38 class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
39 ASTReader &Reader;
40 ModuleFile &F;
41 const DeclID ThisDeclID;
42 const unsigned RawLocation;
43 typedef ASTReader::RecordData RecordData;
44 const RecordData &Record;
45 unsigned &Idx;
46 TypeID TypeIDForTypeDecl;
47 unsigned AnonymousDeclNumber;
48 GlobalDeclID NamedDeclForTagDecl;
49 IdentifierInfo *TypedefNameForLinkage;
50
51 bool HasPendingBody;
52
53 uint64_t GetCurrentCursorOffset();
54
ReadSourceLocation(const RecordData & R,unsigned & I)55 SourceLocation ReadSourceLocation(const RecordData &R, unsigned &I) {
56 return Reader.ReadSourceLocation(F, R, I);
57 }
58
ReadSourceRange(const RecordData & R,unsigned & I)59 SourceRange ReadSourceRange(const RecordData &R, unsigned &I) {
60 return Reader.ReadSourceRange(F, R, I);
61 }
62
GetTypeSourceInfo(const RecordData & R,unsigned & I)63 TypeSourceInfo *GetTypeSourceInfo(const RecordData &R, unsigned &I) {
64 return Reader.GetTypeSourceInfo(F, R, I);
65 }
66
ReadDeclID(const RecordData & R,unsigned & I)67 serialization::DeclID ReadDeclID(const RecordData &R, unsigned &I) {
68 return Reader.ReadDeclID(F, R, I);
69 }
70
ReadDeclIDList(SmallVectorImpl<DeclID> & IDs)71 void ReadDeclIDList(SmallVectorImpl<DeclID> &IDs) {
72 for (unsigned I = 0, Size = Record[Idx++]; I != Size; ++I)
73 IDs.push_back(ReadDeclID(Record, Idx));
74 }
75
ReadDecl(const RecordData & R,unsigned & I)76 Decl *ReadDecl(const RecordData &R, unsigned &I) {
77 return Reader.ReadDecl(F, R, I);
78 }
79
80 template<typename T>
ReadDeclAs(const RecordData & R,unsigned & I)81 T *ReadDeclAs(const RecordData &R, unsigned &I) {
82 return Reader.ReadDeclAs<T>(F, R, I);
83 }
84
ReadQualifierInfo(QualifierInfo & Info,const RecordData & R,unsigned & I)85 void ReadQualifierInfo(QualifierInfo &Info,
86 const RecordData &R, unsigned &I) {
87 Reader.ReadQualifierInfo(F, Info, R, I);
88 }
89
ReadDeclarationNameLoc(DeclarationNameLoc & DNLoc,DeclarationName Name,const RecordData & R,unsigned & I)90 void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name,
91 const RecordData &R, unsigned &I) {
92 Reader.ReadDeclarationNameLoc(F, DNLoc, Name, R, I);
93 }
94
ReadDeclarationNameInfo(DeclarationNameInfo & NameInfo,const RecordData & R,unsigned & I)95 void ReadDeclarationNameInfo(DeclarationNameInfo &NameInfo,
96 const RecordData &R, unsigned &I) {
97 Reader.ReadDeclarationNameInfo(F, NameInfo, R, I);
98 }
99
readSubmoduleID(const RecordData & R,unsigned & I)100 serialization::SubmoduleID readSubmoduleID(const RecordData &R,
101 unsigned &I) {
102 if (I >= R.size())
103 return 0;
104
105 return Reader.getGlobalSubmoduleID(F, R[I++]);
106 }
107
readModule(const RecordData & R,unsigned & I)108 Module *readModule(const RecordData &R, unsigned &I) {
109 return Reader.getSubmodule(readSubmoduleID(R, I));
110 }
111
112 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
113 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
114 const RecordData &R, unsigned &I);
115 void MergeDefinitionData(CXXRecordDecl *D,
116 struct CXXRecordDecl::DefinitionData &&NewDD);
117
118 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
119 DeclContext *DC,
120 unsigned Index);
121 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
122 unsigned Index, NamedDecl *D);
123
124 /// Results from loading a RedeclarableDecl.
125 class RedeclarableResult {
126 GlobalDeclID FirstID;
127 Decl *MergeWith;
128 bool IsKeyDecl;
129
130 public:
RedeclarableResult(GlobalDeclID FirstID,Decl * MergeWith,bool IsKeyDecl)131 RedeclarableResult(GlobalDeclID FirstID, Decl *MergeWith, bool IsKeyDecl)
132 : FirstID(FirstID), MergeWith(MergeWith), IsKeyDecl(IsKeyDecl) {}
133
134 /// \brief Retrieve the first ID.
getFirstID() const135 GlobalDeclID getFirstID() const { return FirstID; }
136
137 /// \brief Is this declaration a key declaration?
isKeyDecl() const138 bool isKeyDecl() const { return IsKeyDecl; }
139
140 /// \brief Get a known declaration that this should be merged with, if
141 /// any.
getKnownMergeTarget() const142 Decl *getKnownMergeTarget() const { return MergeWith; }
143 };
144
145 /// \brief Class used to capture the result of searching for an existing
146 /// declaration of a specific kind and name, along with the ability
147 /// to update the place where this result was found (the declaration
148 /// chain hanging off an identifier or the DeclContext we searched in)
149 /// if requested.
150 class FindExistingResult {
151 ASTReader &Reader;
152 NamedDecl *New;
153 NamedDecl *Existing;
154 mutable bool AddResult;
155
156 unsigned AnonymousDeclNumber;
157 IdentifierInfo *TypedefNameForLinkage;
158
159 void operator=(FindExistingResult&) = delete;
160
161 public:
FindExistingResult(ASTReader & Reader)162 FindExistingResult(ASTReader &Reader)
163 : Reader(Reader), New(nullptr), Existing(nullptr), AddResult(false),
164 AnonymousDeclNumber(0), TypedefNameForLinkage(nullptr) {}
165
FindExistingResult(ASTReader & Reader,NamedDecl * New,NamedDecl * Existing,unsigned AnonymousDeclNumber,IdentifierInfo * TypedefNameForLinkage)166 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
167 unsigned AnonymousDeclNumber,
168 IdentifierInfo *TypedefNameForLinkage)
169 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
170 AnonymousDeclNumber(AnonymousDeclNumber),
171 TypedefNameForLinkage(TypedefNameForLinkage) {}
172
FindExistingResult(const FindExistingResult & Other)173 FindExistingResult(const FindExistingResult &Other)
174 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
175 AddResult(Other.AddResult),
176 AnonymousDeclNumber(Other.AnonymousDeclNumber),
177 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
178 Other.AddResult = false;
179 }
180
181 ~FindExistingResult();
182
183 /// \brief Suppress the addition of this result into the known set of
184 /// names.
suppress()185 void suppress() { AddResult = false; }
186
operator NamedDecl*() const187 operator NamedDecl*() const { return Existing; }
188
189 template<typename T>
operator T*() const190 operator T*() const { return dyn_cast_or_null<T>(Existing); }
191 };
192
193 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
194 DeclContext *DC);
195 FindExistingResult findExisting(NamedDecl *D);
196
197 public:
ASTDeclReader(ASTReader & Reader,ModuleFile & F,DeclID thisDeclID,unsigned RawLocation,const RecordData & Record,unsigned & Idx)198 ASTDeclReader(ASTReader &Reader, ModuleFile &F, DeclID thisDeclID,
199 unsigned RawLocation, const RecordData &Record, unsigned &Idx)
200 : Reader(Reader), F(F), ThisDeclID(thisDeclID),
201 RawLocation(RawLocation), Record(Record), Idx(Idx),
202 TypeIDForTypeDecl(0), NamedDeclForTagDecl(0),
203 TypedefNameForLinkage(nullptr), HasPendingBody(false) {}
204
205 template <typename DeclT>
206 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
207 static Decl *getMostRecentDeclImpl(...);
208 static Decl *getMostRecentDecl(Decl *D);
209
210 template <typename DeclT>
211 static void attachPreviousDeclImpl(ASTReader &Reader,
212 Redeclarable<DeclT> *D, Decl *Previous,
213 Decl *Canon);
214 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
215 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
216 Decl *Canon);
217
218 template <typename DeclT>
219 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
220 static void attachLatestDeclImpl(...);
221 static void attachLatestDecl(Decl *D, Decl *latest);
222
223 template <typename DeclT>
224 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
225 static void markIncompleteDeclChainImpl(...);
226
227 /// \brief Determine whether this declaration has a pending body.
hasPendingBody() const228 bool hasPendingBody() const { return HasPendingBody; }
229
230 void Visit(Decl *D);
231
232 void UpdateDecl(Decl *D, ModuleFile &ModuleFile,
233 const RecordData &Record);
234
setNextObjCCategory(ObjCCategoryDecl * Cat,ObjCCategoryDecl * Next)235 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
236 ObjCCategoryDecl *Next) {
237 Cat->NextClassCategory = Next;
238 }
239
240 void VisitDecl(Decl *D);
241 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
242 void VisitNamedDecl(NamedDecl *ND);
243 void VisitLabelDecl(LabelDecl *LD);
244 void VisitNamespaceDecl(NamespaceDecl *D);
245 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
246 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
247 void VisitTypeDecl(TypeDecl *TD);
248 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
249 void VisitTypedefDecl(TypedefDecl *TD);
250 void VisitTypeAliasDecl(TypeAliasDecl *TD);
251 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
252 RedeclarableResult VisitTagDecl(TagDecl *TD);
253 void VisitEnumDecl(EnumDecl *ED);
254 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
VisitRecordDecl(RecordDecl * RD)255 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
256 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
VisitCXXRecordDecl(CXXRecordDecl * D)257 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
258 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
259 ClassTemplateSpecializationDecl *D);
VisitClassTemplateSpecializationDecl(ClassTemplateSpecializationDecl * D)260 void VisitClassTemplateSpecializationDecl(
261 ClassTemplateSpecializationDecl *D) {
262 VisitClassTemplateSpecializationDeclImpl(D);
263 }
264 void VisitClassTemplatePartialSpecializationDecl(
265 ClassTemplatePartialSpecializationDecl *D);
266 void VisitClassScopeFunctionSpecializationDecl(
267 ClassScopeFunctionSpecializationDecl *D);
268 RedeclarableResult
269 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl * D)270 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
271 VisitVarTemplateSpecializationDeclImpl(D);
272 }
273 void VisitVarTemplatePartialSpecializationDecl(
274 VarTemplatePartialSpecializationDecl *D);
275 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
276 void VisitValueDecl(ValueDecl *VD);
277 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
278 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
279 void VisitDeclaratorDecl(DeclaratorDecl *DD);
280 void VisitFunctionDecl(FunctionDecl *FD);
281 void VisitCXXMethodDecl(CXXMethodDecl *D);
282 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
283 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
284 void VisitCXXConversionDecl(CXXConversionDecl *D);
285 void VisitFieldDecl(FieldDecl *FD);
286 void VisitMSPropertyDecl(MSPropertyDecl *FD);
287 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
288 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
VisitVarDecl(VarDecl * VD)289 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
290 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
291 void VisitParmVarDecl(ParmVarDecl *PD);
292 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
293 DeclID VisitTemplateDecl(TemplateDecl *D);
294 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
295 void VisitClassTemplateDecl(ClassTemplateDecl *D);
296 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
297 void VisitVarTemplateDecl(VarTemplateDecl *D);
298 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
299 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
300 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
301 void VisitUsingDecl(UsingDecl *D);
302 void VisitUsingShadowDecl(UsingShadowDecl *D);
303 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
304 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
305 void VisitImportDecl(ImportDecl *D);
306 void VisitAccessSpecDecl(AccessSpecDecl *D);
307 void VisitFriendDecl(FriendDecl *D);
308 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
309 void VisitStaticAssertDecl(StaticAssertDecl *D);
310 void VisitBlockDecl(BlockDecl *BD);
311 void VisitCapturedDecl(CapturedDecl *CD);
312 void VisitEmptyDecl(EmptyDecl *D);
313
314 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
315
316 template<typename T>
317 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
318
319 template<typename T>
320 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
321 DeclID TemplatePatternID = 0);
322
323 template<typename T>
324 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
325 RedeclarableResult &Redecl,
326 DeclID TemplatePatternID = 0);
327
328 template<typename T>
329 void mergeMergeable(Mergeable<T> *D);
330
331 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
332 RedeclarableTemplateDecl *Existing,
333 DeclID DsID, bool IsKeyDecl);
334
335 ObjCTypeParamList *ReadObjCTypeParamList();
336
337 // FIXME: Reorder according to DeclNodes.td?
338 void VisitObjCMethodDecl(ObjCMethodDecl *D);
339 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
340 void VisitObjCContainerDecl(ObjCContainerDecl *D);
341 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
342 void VisitObjCIvarDecl(ObjCIvarDecl *D);
343 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
344 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
345 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
346 void VisitObjCImplDecl(ObjCImplDecl *D);
347 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
348 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
349 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
350 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
351 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
352 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
353
354 /// We've merged the definition \p MergedDef into the existing definition
355 /// \p Def. Ensure that \p Def is made visible whenever \p MergedDef is made
356 /// visible.
mergeDefinitionVisibility(NamedDecl * Def,NamedDecl * MergedDef)357 void mergeDefinitionVisibility(NamedDecl *Def, NamedDecl *MergedDef) {
358 if (Def->isHidden()) {
359 // If MergedDef is visible or becomes visible, make the definition visible.
360 if (!MergedDef->isHidden())
361 Def->Hidden = false;
362 else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
363 Reader.getContext().mergeDefinitionIntoModule(
364 Def, MergedDef->getImportedOwningModule(),
365 /*NotifyListeners*/ false);
366 Reader.PendingMergedDefinitionsToDeduplicate.insert(Def);
367 } else {
368 auto SubmoduleID = MergedDef->getOwningModuleID();
369 assert(SubmoduleID && "hidden definition in no module");
370 Reader.HiddenNamesMap[Reader.getSubmodule(SubmoduleID)].push_back(Def);
371 }
372 }
373 }
374 };
375 } // end namespace clang
376
377 namespace {
378 /// Iterator over the redeclarations of a declaration that have already
379 /// been merged into the same redeclaration chain.
380 template<typename DeclT>
381 class MergedRedeclIterator {
382 DeclT *Start, *Canonical, *Current;
383 public:
MergedRedeclIterator()384 MergedRedeclIterator() : Current(nullptr) {}
MergedRedeclIterator(DeclT * Start)385 MergedRedeclIterator(DeclT *Start)
386 : Start(Start), Canonical(nullptr), Current(Start) {}
387
operator *()388 DeclT *operator*() { return Current; }
389
operator ++()390 MergedRedeclIterator &operator++() {
391 if (Current->isFirstDecl()) {
392 Canonical = Current;
393 Current = Current->getMostRecentDecl();
394 } else
395 Current = Current->getPreviousDecl();
396
397 // If we started in the merged portion, we'll reach our start position
398 // eventually. Otherwise, we'll never reach it, but the second declaration
399 // we reached was the canonical declaration, so stop when we see that one
400 // again.
401 if (Current == Start || Current == Canonical)
402 Current = nullptr;
403 return *this;
404 }
405
operator !=(const MergedRedeclIterator & A,const MergedRedeclIterator & B)406 friend bool operator!=(const MergedRedeclIterator &A,
407 const MergedRedeclIterator &B) {
408 return A.Current != B.Current;
409 }
410 };
411 } // end anonymous namespace
412
413 template<typename DeclT>
merged_redecls(DeclT * D)414 llvm::iterator_range<MergedRedeclIterator<DeclT>> merged_redecls(DeclT *D) {
415 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
416 MergedRedeclIterator<DeclT>());
417 }
418
GetCurrentCursorOffset()419 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
420 return F.DeclsCursor.GetCurrentBitNo() + F.GlobalBitOffset;
421 }
422
Visit(Decl * D)423 void ASTDeclReader::Visit(Decl *D) {
424 DeclVisitor<ASTDeclReader, void>::Visit(D);
425
426 if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) {
427 if (DD->DeclInfo) {
428 DeclaratorDecl::ExtInfo *Info =
429 DD->DeclInfo.get<DeclaratorDecl::ExtInfo *>();
430 Info->TInfo =
431 GetTypeSourceInfo(Record, Idx);
432 }
433 else {
434 DD->DeclInfo = GetTypeSourceInfo(Record, Idx);
435 }
436 }
437
438 if (TypeDecl *TD = dyn_cast<TypeDecl>(D)) {
439 // We have a fully initialized TypeDecl. Read its type now.
440 TD->setTypeForDecl(Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull());
441
442 // If this is a tag declaration with a typedef name for linkage, it's safe
443 // to load that typedef now.
444 if (NamedDeclForTagDecl)
445 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
446 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
447 } else if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
448 // if we have a fully initialized TypeDecl, we can safely read its type now.
449 ID->TypeForDecl = Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull();
450 } else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
451 // FunctionDecl's body was written last after all other Stmts/Exprs.
452 // We only read it if FD doesn't already have a body (e.g., from another
453 // module).
454 // FIXME: Can we diagnose ODR violations somehow?
455 if (Record[Idx++]) {
456 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
457 CD->NumCtorInitializers = Record[Idx++];
458 if (CD->NumCtorInitializers)
459 CD->CtorInitializers =
460 Reader.ReadCXXCtorInitializersRef(F, Record, Idx);
461 }
462 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
463 HasPendingBody = true;
464 }
465 }
466 }
467
VisitDecl(Decl * D)468 void ASTDeclReader::VisitDecl(Decl *D) {
469 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
470 isa<ParmVarDecl>(D)) {
471 // We don't want to deserialize the DeclContext of a template
472 // parameter or of a parameter of a function template immediately. These
473 // entities might be used in the formulation of its DeclContext (for
474 // example, a function parameter can be used in decltype() in trailing
475 // return type of the function). Use the translation unit DeclContext as a
476 // placeholder.
477 GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID(Record, Idx);
478 GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID(Record, Idx);
479 if (!LexicalDCIDForTemplateParmDecl)
480 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
481 Reader.addPendingDeclContextInfo(D,
482 SemaDCIDForTemplateParmDecl,
483 LexicalDCIDForTemplateParmDecl);
484 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
485 } else {
486 DeclContext *SemaDC = ReadDeclAs<DeclContext>(Record, Idx);
487 DeclContext *LexicalDC = ReadDeclAs<DeclContext>(Record, Idx);
488 if (!LexicalDC)
489 LexicalDC = SemaDC;
490 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
491 // Avoid calling setLexicalDeclContext() directly because it uses
492 // Decl::getASTContext() internally which is unsafe during derialization.
493 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
494 Reader.getContext());
495 }
496 D->setLocation(Reader.ReadSourceLocation(F, RawLocation));
497 D->setInvalidDecl(Record[Idx++]);
498 if (Record[Idx++]) { // hasAttrs
499 AttrVec Attrs;
500 Reader.ReadAttributes(F, Attrs, Record, Idx);
501 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
502 // internally which is unsafe during derialization.
503 D->setAttrsImpl(Attrs, Reader.getContext());
504 }
505 D->setImplicit(Record[Idx++]);
506 D->Used = Record[Idx++];
507 D->setReferenced(Record[Idx++]);
508 D->setTopLevelDeclInObjCContainer(Record[Idx++]);
509 D->setAccess((AccessSpecifier)Record[Idx++]);
510 D->FromASTFile = true;
511 D->setModulePrivate(Record[Idx++]);
512 D->Hidden = D->isModulePrivate();
513
514 // Determine whether this declaration is part of a (sub)module. If so, it
515 // may not yet be visible.
516 if (unsigned SubmoduleID = readSubmoduleID(Record, Idx)) {
517 // Store the owning submodule ID in the declaration.
518 D->setOwningModuleID(SubmoduleID);
519
520 if (D->Hidden) {
521 // Module-private declarations are never visible, so there is no work to do.
522 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
523 // If local visibility is being tracked, this declaration will become
524 // hidden and visible as the owning module does. Inform Sema that this
525 // declaration might not be visible.
526 D->Hidden = true;
527 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
528 if (Owner->NameVisibility != Module::AllVisible) {
529 // The owning module is not visible. Mark this declaration as hidden.
530 D->Hidden = true;
531
532 // Note that this declaration was hidden because its owning module is
533 // not yet visible.
534 Reader.HiddenNamesMap[Owner].push_back(D);
535 }
536 }
537 }
538 }
539
VisitTranslationUnitDecl(TranslationUnitDecl * TU)540 void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
541 llvm_unreachable("Translation units are not serialized");
542 }
543
VisitNamedDecl(NamedDecl * ND)544 void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
545 VisitDecl(ND);
546 ND->setDeclName(Reader.ReadDeclarationName(F, Record, Idx));
547 AnonymousDeclNumber = Record[Idx++];
548 }
549
VisitTypeDecl(TypeDecl * TD)550 void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
551 VisitNamedDecl(TD);
552 TD->setLocStart(ReadSourceLocation(Record, Idx));
553 // Delay type reading until after we have fully initialized the decl.
554 TypeIDForTypeDecl = Reader.getGlobalTypeID(F, Record[Idx++]);
555 }
556
557 ASTDeclReader::RedeclarableResult
VisitTypedefNameDecl(TypedefNameDecl * TD)558 ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
559 RedeclarableResult Redecl = VisitRedeclarable(TD);
560 VisitTypeDecl(TD);
561 TypeSourceInfo *TInfo = GetTypeSourceInfo(Record, Idx);
562 if (Record[Idx++]) { // isModed
563 QualType modedT = Reader.readType(F, Record, Idx);
564 TD->setModedTypeSourceInfo(TInfo, modedT);
565 } else
566 TD->setTypeSourceInfo(TInfo);
567 return Redecl;
568 }
569
VisitTypedefDecl(TypedefDecl * TD)570 void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
571 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
572 mergeRedeclarable(TD, Redecl);
573 }
574
VisitTypeAliasDecl(TypeAliasDecl * TD)575 void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
576 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
577 if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>(Record, Idx))
578 // Merged when we merge the template.
579 TD->setDescribedAliasTemplate(Template);
580 else
581 mergeRedeclarable(TD, Redecl);
582 }
583
VisitTagDecl(TagDecl * TD)584 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
585 RedeclarableResult Redecl = VisitRedeclarable(TD);
586 VisitTypeDecl(TD);
587
588 TD->IdentifierNamespace = Record[Idx++];
589 TD->setTagKind((TagDecl::TagKind)Record[Idx++]);
590 if (!isa<CXXRecordDecl>(TD))
591 TD->setCompleteDefinition(Record[Idx++]);
592 TD->setEmbeddedInDeclarator(Record[Idx++]);
593 TD->setFreeStanding(Record[Idx++]);
594 TD->setCompleteDefinitionRequired(Record[Idx++]);
595 TD->setRBraceLoc(ReadSourceLocation(Record, Idx));
596
597 switch (Record[Idx++]) {
598 case 0:
599 break;
600 case 1: { // ExtInfo
601 TagDecl::ExtInfo *Info = new (Reader.getContext()) TagDecl::ExtInfo();
602 ReadQualifierInfo(*Info, Record, Idx);
603 TD->TypedefNameDeclOrQualifier = Info;
604 break;
605 }
606 case 2: // TypedefNameForAnonDecl
607 NamedDeclForTagDecl = ReadDeclID(Record, Idx);
608 TypedefNameForLinkage = Reader.GetIdentifierInfo(F, Record, Idx);
609 break;
610 default:
611 llvm_unreachable("unexpected tag info kind");
612 }
613
614 if (!isa<CXXRecordDecl>(TD))
615 mergeRedeclarable(TD, Redecl);
616 return Redecl;
617 }
618
VisitEnumDecl(EnumDecl * ED)619 void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
620 VisitTagDecl(ED);
621 if (TypeSourceInfo *TI = Reader.GetTypeSourceInfo(F, Record, Idx))
622 ED->setIntegerTypeSourceInfo(TI);
623 else
624 ED->setIntegerType(Reader.readType(F, Record, Idx));
625 ED->setPromotionType(Reader.readType(F, Record, Idx));
626 ED->setNumPositiveBits(Record[Idx++]);
627 ED->setNumNegativeBits(Record[Idx++]);
628 ED->IsScoped = Record[Idx++];
629 ED->IsScopedUsingClassTag = Record[Idx++];
630 ED->IsFixed = Record[Idx++];
631
632 // If this is a definition subject to the ODR, and we already have a
633 // definition, merge this one into it.
634 if (ED->IsCompleteDefinition &&
635 Reader.getContext().getLangOpts().Modules &&
636 Reader.getContext().getLangOpts().CPlusPlus) {
637 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
638 if (!OldDef) {
639 // This is the first time we've seen an imported definition. Look for a
640 // local definition before deciding that we are the first definition.
641 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
642 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
643 OldDef = D;
644 break;
645 }
646 }
647 }
648 if (OldDef) {
649 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
650 ED->IsCompleteDefinition = false;
651 mergeDefinitionVisibility(OldDef, ED);
652 } else {
653 OldDef = ED;
654 }
655 }
656
657 if (EnumDecl *InstED = ReadDeclAs<EnumDecl>(Record, Idx)) {
658 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
659 SourceLocation POI = ReadSourceLocation(Record, Idx);
660 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
661 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
662 }
663 }
664
665 ASTDeclReader::RedeclarableResult
VisitRecordDeclImpl(RecordDecl * RD)666 ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
667 RedeclarableResult Redecl = VisitTagDecl(RD);
668 RD->setHasFlexibleArrayMember(Record[Idx++]);
669 RD->setAnonymousStructOrUnion(Record[Idx++]);
670 RD->setHasObjectMember(Record[Idx++]);
671 RD->setHasVolatileMember(Record[Idx++]);
672 return Redecl;
673 }
674
VisitValueDecl(ValueDecl * VD)675 void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
676 VisitNamedDecl(VD);
677 VD->setType(Reader.readType(F, Record, Idx));
678 }
679
VisitEnumConstantDecl(EnumConstantDecl * ECD)680 void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
681 VisitValueDecl(ECD);
682 if (Record[Idx++])
683 ECD->setInitExpr(Reader.ReadExpr(F));
684 ECD->setInitVal(Reader.ReadAPSInt(Record, Idx));
685 mergeMergeable(ECD);
686 }
687
VisitDeclaratorDecl(DeclaratorDecl * DD)688 void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
689 VisitValueDecl(DD);
690 DD->setInnerLocStart(ReadSourceLocation(Record, Idx));
691 if (Record[Idx++]) { // hasExtInfo
692 DeclaratorDecl::ExtInfo *Info
693 = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
694 ReadQualifierInfo(*Info, Record, Idx);
695 DD->DeclInfo = Info;
696 }
697 }
698
VisitFunctionDecl(FunctionDecl * FD)699 void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
700 RedeclarableResult Redecl = VisitRedeclarable(FD);
701 VisitDeclaratorDecl(FD);
702
703 ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName(), Record, Idx);
704 FD->IdentifierNamespace = Record[Idx++];
705
706 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
707 // after everything else is read.
708
709 FD->SClass = (StorageClass)Record[Idx++];
710 FD->IsInline = Record[Idx++];
711 FD->IsInlineSpecified = Record[Idx++];
712 FD->IsVirtualAsWritten = Record[Idx++];
713 FD->IsPure = Record[Idx++];
714 FD->HasInheritedPrototype = Record[Idx++];
715 FD->HasWrittenPrototype = Record[Idx++];
716 FD->IsDeleted = Record[Idx++];
717 FD->IsTrivial = Record[Idx++];
718 FD->IsDefaulted = Record[Idx++];
719 FD->IsExplicitlyDefaulted = Record[Idx++];
720 FD->HasImplicitReturnZero = Record[Idx++];
721 FD->IsConstexpr = Record[Idx++];
722 FD->HasSkippedBody = Record[Idx++];
723 FD->IsLateTemplateParsed = Record[Idx++];
724 FD->setCachedLinkage(Linkage(Record[Idx++]));
725 FD->EndRangeLoc = ReadSourceLocation(Record, Idx);
726
727 switch ((FunctionDecl::TemplatedKind)Record[Idx++]) {
728 case FunctionDecl::TK_NonTemplate:
729 mergeRedeclarable(FD, Redecl);
730 break;
731 case FunctionDecl::TK_FunctionTemplate:
732 // Merged when we merge the template.
733 FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>(Record,
734 Idx));
735 break;
736 case FunctionDecl::TK_MemberSpecialization: {
737 FunctionDecl *InstFD = ReadDeclAs<FunctionDecl>(Record, Idx);
738 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
739 SourceLocation POI = ReadSourceLocation(Record, Idx);
740 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
741 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
742 mergeRedeclarable(FD, Redecl);
743 break;
744 }
745 case FunctionDecl::TK_FunctionTemplateSpecialization: {
746 FunctionTemplateDecl *Template = ReadDeclAs<FunctionTemplateDecl>(Record,
747 Idx);
748 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
749
750 // Template arguments.
751 SmallVector<TemplateArgument, 8> TemplArgs;
752 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx,
753 /*Canonicalize*/ true);
754
755 // Template args as written.
756 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
757 SourceLocation LAngleLoc, RAngleLoc;
758 bool HasTemplateArgumentsAsWritten = Record[Idx++];
759 if (HasTemplateArgumentsAsWritten) {
760 unsigned NumTemplateArgLocs = Record[Idx++];
761 TemplArgLocs.reserve(NumTemplateArgLocs);
762 for (unsigned i=0; i != NumTemplateArgLocs; ++i)
763 TemplArgLocs.push_back(
764 Reader.ReadTemplateArgumentLoc(F, Record, Idx));
765
766 LAngleLoc = ReadSourceLocation(Record, Idx);
767 RAngleLoc = ReadSourceLocation(Record, Idx);
768 }
769
770 SourceLocation POI = ReadSourceLocation(Record, Idx);
771
772 ASTContext &C = Reader.getContext();
773 TemplateArgumentList *TemplArgList
774 = TemplateArgumentList::CreateCopy(C, TemplArgs.data(), TemplArgs.size());
775 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
776 for (unsigned i=0, e = TemplArgLocs.size(); i != e; ++i)
777 TemplArgsInfo.addArgument(TemplArgLocs[i]);
778 FunctionTemplateSpecializationInfo *FTInfo
779 = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
780 TemplArgList,
781 HasTemplateArgumentsAsWritten ? &TemplArgsInfo
782 : nullptr,
783 POI);
784 FD->TemplateOrSpecialization = FTInfo;
785
786 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
787 // The template that contains the specializations set. It's not safe to
788 // use getCanonicalDecl on Template since it may still be initializing.
789 FunctionTemplateDecl *CanonTemplate
790 = ReadDeclAs<FunctionTemplateDecl>(Record, Idx);
791 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
792 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
793 // FunctionTemplateSpecializationInfo's Profile().
794 // We avoid getASTContext because a decl in the parent hierarchy may
795 // be initializing.
796 llvm::FoldingSetNodeID ID;
797 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
798 void *InsertPos = nullptr;
799 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
800 FunctionTemplateSpecializationInfo *ExistingInfo =
801 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
802 if (InsertPos)
803 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
804 else {
805 assert(Reader.getContext().getLangOpts().Modules &&
806 "already deserialized this template specialization");
807 mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
808 }
809 }
810 break;
811 }
812 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
813 // Templates.
814 UnresolvedSet<8> TemplDecls;
815 unsigned NumTemplates = Record[Idx++];
816 while (NumTemplates--)
817 TemplDecls.addDecl(ReadDeclAs<NamedDecl>(Record, Idx));
818
819 // Templates args.
820 TemplateArgumentListInfo TemplArgs;
821 unsigned NumArgs = Record[Idx++];
822 while (NumArgs--)
823 TemplArgs.addArgument(Reader.ReadTemplateArgumentLoc(F, Record, Idx));
824 TemplArgs.setLAngleLoc(ReadSourceLocation(Record, Idx));
825 TemplArgs.setRAngleLoc(ReadSourceLocation(Record, Idx));
826
827 FD->setDependentTemplateSpecialization(Reader.getContext(),
828 TemplDecls, TemplArgs);
829 // These are not merged; we don't need to merge redeclarations of dependent
830 // template friends.
831 break;
832 }
833 }
834
835 // Read in the parameters.
836 unsigned NumParams = Record[Idx++];
837 SmallVector<ParmVarDecl *, 16> Params;
838 Params.reserve(NumParams);
839 for (unsigned I = 0; I != NumParams; ++I)
840 Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
841 FD->setParams(Reader.getContext(), Params);
842 }
843
VisitObjCMethodDecl(ObjCMethodDecl * MD)844 void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
845 VisitNamedDecl(MD);
846 if (Record[Idx++]) {
847 // Load the body on-demand. Most clients won't care, because method
848 // definitions rarely show up in headers.
849 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
850 HasPendingBody = true;
851 MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>(Record, Idx));
852 MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>(Record, Idx));
853 }
854 MD->setInstanceMethod(Record[Idx++]);
855 MD->setVariadic(Record[Idx++]);
856 MD->setPropertyAccessor(Record[Idx++]);
857 MD->setDefined(Record[Idx++]);
858 MD->IsOverriding = Record[Idx++];
859 MD->HasSkippedBody = Record[Idx++];
860
861 MD->IsRedeclaration = Record[Idx++];
862 MD->HasRedeclaration = Record[Idx++];
863 if (MD->HasRedeclaration)
864 Reader.getContext().setObjCMethodRedeclaration(MD,
865 ReadDeclAs<ObjCMethodDecl>(Record, Idx));
866
867 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record[Idx++]);
868 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record[Idx++]);
869 MD->SetRelatedResultType(Record[Idx++]);
870 MD->setReturnType(Reader.readType(F, Record, Idx));
871 MD->setReturnTypeSourceInfo(GetTypeSourceInfo(Record, Idx));
872 MD->DeclEndLoc = ReadSourceLocation(Record, Idx);
873 unsigned NumParams = Record[Idx++];
874 SmallVector<ParmVarDecl *, 16> Params;
875 Params.reserve(NumParams);
876 for (unsigned I = 0; I != NumParams; ++I)
877 Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
878
879 MD->SelLocsKind = Record[Idx++];
880 unsigned NumStoredSelLocs = Record[Idx++];
881 SmallVector<SourceLocation, 16> SelLocs;
882 SelLocs.reserve(NumStoredSelLocs);
883 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
884 SelLocs.push_back(ReadSourceLocation(Record, Idx));
885
886 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
887 }
888
VisitObjCTypeParamDecl(ObjCTypeParamDecl * D)889 void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
890 VisitTypedefNameDecl(D);
891
892 D->Variance = Record[Idx++];
893 D->Index = Record[Idx++];
894 D->VarianceLoc = ReadSourceLocation(Record, Idx);
895 D->ColonLoc = ReadSourceLocation(Record, Idx);
896 }
897
VisitObjCContainerDecl(ObjCContainerDecl * CD)898 void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
899 VisitNamedDecl(CD);
900 CD->setAtStartLoc(ReadSourceLocation(Record, Idx));
901 CD->setAtEndRange(ReadSourceRange(Record, Idx));
902 }
903
ReadObjCTypeParamList()904 ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
905 unsigned numParams = Record[Idx++];
906 if (numParams == 0)
907 return nullptr;
908
909 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
910 typeParams.reserve(numParams);
911 for (unsigned i = 0; i != numParams; ++i) {
912 auto typeParam = ReadDeclAs<ObjCTypeParamDecl>(Record, Idx);
913 if (!typeParam)
914 return nullptr;
915
916 typeParams.push_back(typeParam);
917 }
918
919 SourceLocation lAngleLoc = ReadSourceLocation(Record, Idx);
920 SourceLocation rAngleLoc = ReadSourceLocation(Record, Idx);
921
922 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
923 typeParams, rAngleLoc);
924 }
925
VisitObjCInterfaceDecl(ObjCInterfaceDecl * ID)926 void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
927 RedeclarableResult Redecl = VisitRedeclarable(ID);
928 VisitObjCContainerDecl(ID);
929 TypeIDForTypeDecl = Reader.getGlobalTypeID(F, Record[Idx++]);
930 mergeRedeclarable(ID, Redecl);
931
932 ID->TypeParamList = ReadObjCTypeParamList();
933 if (Record[Idx++]) {
934 // Read the definition.
935 ID->allocateDefinitionData();
936
937 // Set the definition data of the canonical declaration, so other
938 // redeclarations will see it.
939 ID->getCanonicalDecl()->Data = ID->Data;
940
941 ObjCInterfaceDecl::DefinitionData &Data = ID->data();
942
943 // Read the superclass.
944 Data.SuperClassTInfo = GetTypeSourceInfo(Record, Idx);
945
946 Data.EndLoc = ReadSourceLocation(Record, Idx);
947 Data.HasDesignatedInitializers = Record[Idx++];
948
949 // Read the directly referenced protocols and their SourceLocations.
950 unsigned NumProtocols = Record[Idx++];
951 SmallVector<ObjCProtocolDecl *, 16> Protocols;
952 Protocols.reserve(NumProtocols);
953 for (unsigned I = 0; I != NumProtocols; ++I)
954 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
955 SmallVector<SourceLocation, 16> ProtoLocs;
956 ProtoLocs.reserve(NumProtocols);
957 for (unsigned I = 0; I != NumProtocols; ++I)
958 ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
959 ID->setProtocolList(Protocols.data(), NumProtocols, ProtoLocs.data(),
960 Reader.getContext());
961
962 // Read the transitive closure of protocols referenced by this class.
963 NumProtocols = Record[Idx++];
964 Protocols.clear();
965 Protocols.reserve(NumProtocols);
966 for (unsigned I = 0; I != NumProtocols; ++I)
967 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
968 ID->data().AllReferencedProtocols.set(Protocols.data(), NumProtocols,
969 Reader.getContext());
970
971 // We will rebuild this list lazily.
972 ID->setIvarList(nullptr);
973
974 // Note that we have deserialized a definition.
975 Reader.PendingDefinitions.insert(ID);
976
977 // Note that we've loaded this Objective-C class.
978 Reader.ObjCClassesLoaded.push_back(ID);
979 } else {
980 ID->Data = ID->getCanonicalDecl()->Data;
981 }
982 }
983
VisitObjCIvarDecl(ObjCIvarDecl * IVD)984 void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
985 VisitFieldDecl(IVD);
986 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record[Idx++]);
987 // This field will be built lazily.
988 IVD->setNextIvar(nullptr);
989 bool synth = Record[Idx++];
990 IVD->setSynthesize(synth);
991 }
992
VisitObjCProtocolDecl(ObjCProtocolDecl * PD)993 void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
994 RedeclarableResult Redecl = VisitRedeclarable(PD);
995 VisitObjCContainerDecl(PD);
996 mergeRedeclarable(PD, Redecl);
997
998 if (Record[Idx++]) {
999 // Read the definition.
1000 PD->allocateDefinitionData();
1001
1002 // Set the definition data of the canonical declaration, so other
1003 // redeclarations will see it.
1004 PD->getCanonicalDecl()->Data = PD->Data;
1005
1006 unsigned NumProtoRefs = Record[Idx++];
1007 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1008 ProtoRefs.reserve(NumProtoRefs);
1009 for (unsigned I = 0; I != NumProtoRefs; ++I)
1010 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
1011 SmallVector<SourceLocation, 16> ProtoLocs;
1012 ProtoLocs.reserve(NumProtoRefs);
1013 for (unsigned I = 0; I != NumProtoRefs; ++I)
1014 ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
1015 PD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1016 Reader.getContext());
1017
1018 // Note that we have deserialized a definition.
1019 Reader.PendingDefinitions.insert(PD);
1020 } else {
1021 PD->Data = PD->getCanonicalDecl()->Data;
1022 }
1023 }
1024
VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl * FD)1025 void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1026 VisitFieldDecl(FD);
1027 }
1028
VisitObjCCategoryDecl(ObjCCategoryDecl * CD)1029 void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1030 VisitObjCContainerDecl(CD);
1031 CD->setCategoryNameLoc(ReadSourceLocation(Record, Idx));
1032 CD->setIvarLBraceLoc(ReadSourceLocation(Record, Idx));
1033 CD->setIvarRBraceLoc(ReadSourceLocation(Record, Idx));
1034
1035 // Note that this category has been deserialized. We do this before
1036 // deserializing the interface declaration, so that it will consider this
1037 /// category.
1038 Reader.CategoriesDeserialized.insert(CD);
1039
1040 CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>(Record, Idx);
1041 CD->TypeParamList = ReadObjCTypeParamList();
1042 unsigned NumProtoRefs = Record[Idx++];
1043 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1044 ProtoRefs.reserve(NumProtoRefs);
1045 for (unsigned I = 0; I != NumProtoRefs; ++I)
1046 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
1047 SmallVector<SourceLocation, 16> ProtoLocs;
1048 ProtoLocs.reserve(NumProtoRefs);
1049 for (unsigned I = 0; I != NumProtoRefs; ++I)
1050 ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
1051 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1052 Reader.getContext());
1053 }
1054
VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl * CAD)1055 void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1056 VisitNamedDecl(CAD);
1057 CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
1058 }
1059
VisitObjCPropertyDecl(ObjCPropertyDecl * D)1060 void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1061 VisitNamedDecl(D);
1062 D->setAtLoc(ReadSourceLocation(Record, Idx));
1063 D->setLParenLoc(ReadSourceLocation(Record, Idx));
1064 QualType T = Reader.readType(F, Record, Idx);
1065 TypeSourceInfo *TSI = GetTypeSourceInfo(Record, Idx);
1066 D->setType(T, TSI);
1067 D->setPropertyAttributes(
1068 (ObjCPropertyDecl::PropertyAttributeKind)Record[Idx++]);
1069 D->setPropertyAttributesAsWritten(
1070 (ObjCPropertyDecl::PropertyAttributeKind)Record[Idx++]);
1071 D->setPropertyImplementation(
1072 (ObjCPropertyDecl::PropertyControl)Record[Idx++]);
1073 D->setGetterName(Reader.ReadDeclarationName(F,Record, Idx).getObjCSelector());
1074 D->setSetterName(Reader.ReadDeclarationName(F,Record, Idx).getObjCSelector());
1075 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>(Record, Idx));
1076 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>(Record, Idx));
1077 D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>(Record, Idx));
1078 }
1079
VisitObjCImplDecl(ObjCImplDecl * D)1080 void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1081 VisitObjCContainerDecl(D);
1082 D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
1083 }
1084
VisitObjCCategoryImplDecl(ObjCCategoryImplDecl * D)1085 void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1086 VisitObjCImplDecl(D);
1087 D->setIdentifier(Reader.GetIdentifierInfo(F, Record, Idx));
1088 D->CategoryNameLoc = ReadSourceLocation(Record, Idx);
1089 }
1090
VisitObjCImplementationDecl(ObjCImplementationDecl * D)1091 void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1092 VisitObjCImplDecl(D);
1093 D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
1094 D->SuperLoc = ReadSourceLocation(Record, Idx);
1095 D->setIvarLBraceLoc(ReadSourceLocation(Record, Idx));
1096 D->setIvarRBraceLoc(ReadSourceLocation(Record, Idx));
1097 D->setHasNonZeroConstructors(Record[Idx++]);
1098 D->setHasDestructors(Record[Idx++]);
1099 D->NumIvarInitializers = Record[Idx++];
1100 if (D->NumIvarInitializers)
1101 D->IvarInitializers = Reader.ReadCXXCtorInitializersRef(F, Record, Idx);
1102 }
1103
VisitObjCPropertyImplDecl(ObjCPropertyImplDecl * D)1104 void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1105 VisitDecl(D);
1106 D->setAtLoc(ReadSourceLocation(Record, Idx));
1107 D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>(Record, Idx));
1108 D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>(Record, Idx);
1109 D->IvarLoc = ReadSourceLocation(Record, Idx);
1110 D->setGetterCXXConstructor(Reader.ReadExpr(F));
1111 D->setSetterCXXAssignment(Reader.ReadExpr(F));
1112 }
1113
VisitFieldDecl(FieldDecl * FD)1114 void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1115 VisitDeclaratorDecl(FD);
1116 FD->Mutable = Record[Idx++];
1117 if (int BitWidthOrInitializer = Record[Idx++]) {
1118 FD->InitStorage.setInt(
1119 static_cast<FieldDecl::InitStorageKind>(BitWidthOrInitializer - 1));
1120 if (FD->InitStorage.getInt() == FieldDecl::ISK_CapturedVLAType) {
1121 // Read captured variable length array.
1122 FD->InitStorage.setPointer(
1123 Reader.readType(F, Record, Idx).getAsOpaquePtr());
1124 } else {
1125 FD->InitStorage.setPointer(Reader.ReadExpr(F));
1126 }
1127 }
1128 if (!FD->getDeclName()) {
1129 if (FieldDecl *Tmpl = ReadDeclAs<FieldDecl>(Record, Idx))
1130 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1131 }
1132 mergeMergeable(FD);
1133 }
1134
VisitMSPropertyDecl(MSPropertyDecl * PD)1135 void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1136 VisitDeclaratorDecl(PD);
1137 PD->GetterId = Reader.GetIdentifierInfo(F, Record, Idx);
1138 PD->SetterId = Reader.GetIdentifierInfo(F, Record, Idx);
1139 }
1140
VisitIndirectFieldDecl(IndirectFieldDecl * FD)1141 void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1142 VisitValueDecl(FD);
1143
1144 FD->ChainingSize = Record[Idx++];
1145 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
1146 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1147
1148 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1149 FD->Chaining[I] = ReadDeclAs<NamedDecl>(Record, Idx);
1150
1151 mergeMergeable(FD);
1152 }
1153
VisitVarDeclImpl(VarDecl * VD)1154 ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1155 RedeclarableResult Redecl = VisitRedeclarable(VD);
1156 VisitDeclaratorDecl(VD);
1157
1158 VD->VarDeclBits.SClass = (StorageClass)Record[Idx++];
1159 VD->VarDeclBits.TSCSpec = Record[Idx++];
1160 VD->VarDeclBits.InitStyle = Record[Idx++];
1161 if (!isa<ParmVarDecl>(VD)) {
1162 VD->NonParmVarDeclBits.ExceptionVar = Record[Idx++];
1163 VD->NonParmVarDeclBits.NRVOVariable = Record[Idx++];
1164 VD->NonParmVarDeclBits.CXXForRangeDecl = Record[Idx++];
1165 VD->NonParmVarDeclBits.ARCPseudoStrong = Record[Idx++];
1166 VD->NonParmVarDeclBits.IsConstexpr = Record[Idx++];
1167 VD->NonParmVarDeclBits.IsInitCapture = Record[Idx++];
1168 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record[Idx++];
1169 }
1170 Linkage VarLinkage = Linkage(Record[Idx++]);
1171 VD->setCachedLinkage(VarLinkage);
1172
1173 // Reconstruct the one piece of the IdentifierNamespace that we need.
1174 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1175 VD->getLexicalDeclContext()->isFunctionOrMethod())
1176 VD->setLocalExternDecl();
1177
1178 if (uint64_t Val = Record[Idx++]) {
1179 VD->setInit(Reader.ReadExpr(F));
1180 if (Val > 1) {
1181 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1182 Eval->CheckedICE = true;
1183 Eval->IsICE = Val == 3;
1184 }
1185 }
1186
1187 enum VarKind {
1188 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1189 };
1190 switch ((VarKind)Record[Idx++]) {
1191 case VarNotTemplate:
1192 // Only true variables (not parameters or implicit parameters) can be
1193 // merged; the other kinds are not really redeclarable at all.
1194 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1195 !isa<VarTemplateSpecializationDecl>(VD))
1196 mergeRedeclarable(VD, Redecl);
1197 break;
1198 case VarTemplate:
1199 // Merged when we merge the template.
1200 VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>(Record, Idx));
1201 break;
1202 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1203 VarDecl *Tmpl = ReadDeclAs<VarDecl>(Record, Idx);
1204 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
1205 SourceLocation POI = ReadSourceLocation(Record, Idx);
1206 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1207 mergeRedeclarable(VD, Redecl);
1208 break;
1209 }
1210 }
1211
1212 return Redecl;
1213 }
1214
VisitImplicitParamDecl(ImplicitParamDecl * PD)1215 void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1216 VisitVarDecl(PD);
1217 }
1218
VisitParmVarDecl(ParmVarDecl * PD)1219 void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1220 VisitVarDecl(PD);
1221 unsigned isObjCMethodParam = Record[Idx++];
1222 unsigned scopeDepth = Record[Idx++];
1223 unsigned scopeIndex = Record[Idx++];
1224 unsigned declQualifier = Record[Idx++];
1225 if (isObjCMethodParam) {
1226 assert(scopeDepth == 0);
1227 PD->setObjCMethodScopeInfo(scopeIndex);
1228 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1229 } else {
1230 PD->setScopeInfo(scopeDepth, scopeIndex);
1231 }
1232 PD->ParmVarDeclBits.IsKNRPromoted = Record[Idx++];
1233 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record[Idx++];
1234 if (Record[Idx++]) // hasUninstantiatedDefaultArg.
1235 PD->setUninstantiatedDefaultArg(Reader.ReadExpr(F));
1236
1237 // FIXME: If this is a redeclaration of a function from another module, handle
1238 // inheritance of default arguments.
1239 }
1240
VisitFileScopeAsmDecl(FileScopeAsmDecl * AD)1241 void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1242 VisitDecl(AD);
1243 AD->setAsmString(cast<StringLiteral>(Reader.ReadExpr(F)));
1244 AD->setRParenLoc(ReadSourceLocation(Record, Idx));
1245 }
1246
VisitBlockDecl(BlockDecl * BD)1247 void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1248 VisitDecl(BD);
1249 BD->setBody(cast_or_null<CompoundStmt>(Reader.ReadStmt(F)));
1250 BD->setSignatureAsWritten(GetTypeSourceInfo(Record, Idx));
1251 unsigned NumParams = Record[Idx++];
1252 SmallVector<ParmVarDecl *, 16> Params;
1253 Params.reserve(NumParams);
1254 for (unsigned I = 0; I != NumParams; ++I)
1255 Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
1256 BD->setParams(Params);
1257
1258 BD->setIsVariadic(Record[Idx++]);
1259 BD->setBlockMissingReturnType(Record[Idx++]);
1260 BD->setIsConversionFromLambda(Record[Idx++]);
1261
1262 bool capturesCXXThis = Record[Idx++];
1263 unsigned numCaptures = Record[Idx++];
1264 SmallVector<BlockDecl::Capture, 16> captures;
1265 captures.reserve(numCaptures);
1266 for (unsigned i = 0; i != numCaptures; ++i) {
1267 VarDecl *decl = ReadDeclAs<VarDecl>(Record, Idx);
1268 unsigned flags = Record[Idx++];
1269 bool byRef = (flags & 1);
1270 bool nested = (flags & 2);
1271 Expr *copyExpr = ((flags & 4) ? Reader.ReadExpr(F) : nullptr);
1272
1273 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1274 }
1275 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1276 }
1277
VisitCapturedDecl(CapturedDecl * CD)1278 void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1279 VisitDecl(CD);
1280 unsigned ContextParamPos = Record[Idx++];
1281 CD->setNothrow(Record[Idx++] != 0);
1282 // Body is set by VisitCapturedStmt.
1283 for (unsigned I = 0; I < CD->NumParams; ++I) {
1284 if (I != ContextParamPos)
1285 CD->setParam(I, ReadDeclAs<ImplicitParamDecl>(Record, Idx));
1286 else
1287 CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>(Record, Idx));
1288 }
1289 }
1290
VisitLinkageSpecDecl(LinkageSpecDecl * D)1291 void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1292 VisitDecl(D);
1293 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record[Idx++]);
1294 D->setExternLoc(ReadSourceLocation(Record, Idx));
1295 D->setRBraceLoc(ReadSourceLocation(Record, Idx));
1296 }
1297
VisitLabelDecl(LabelDecl * D)1298 void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1299 VisitNamedDecl(D);
1300 D->setLocStart(ReadSourceLocation(Record, Idx));
1301 }
1302
VisitNamespaceDecl(NamespaceDecl * D)1303 void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1304 RedeclarableResult Redecl = VisitRedeclarable(D);
1305 VisitNamedDecl(D);
1306 D->setInline(Record[Idx++]);
1307 D->LocStart = ReadSourceLocation(Record, Idx);
1308 D->RBraceLoc = ReadSourceLocation(Record, Idx);
1309
1310 // Defer loading the anonymous namespace until we've finished merging
1311 // this namespace; loading it might load a later declaration of the
1312 // same namespace, and we have an invariant that older declarations
1313 // get merged before newer ones try to merge.
1314 GlobalDeclID AnonNamespace = 0;
1315 if (Redecl.getFirstID() == ThisDeclID) {
1316 AnonNamespace = ReadDeclID(Record, Idx);
1317 } else {
1318 // Link this namespace back to the first declaration, which has already
1319 // been deserialized.
1320 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1321 }
1322
1323 mergeRedeclarable(D, Redecl);
1324
1325 if (AnonNamespace) {
1326 // Each module has its own anonymous namespace, which is disjoint from
1327 // any other module's anonymous namespaces, so don't attach the anonymous
1328 // namespace at all.
1329 NamespaceDecl *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1330 if (F.Kind != MK_ImplicitModule && F.Kind != MK_ExplicitModule)
1331 D->setAnonymousNamespace(Anon);
1332 }
1333 }
1334
VisitNamespaceAliasDecl(NamespaceAliasDecl * D)1335 void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1336 RedeclarableResult Redecl = VisitRedeclarable(D);
1337 VisitNamedDecl(D);
1338 D->NamespaceLoc = ReadSourceLocation(Record, Idx);
1339 D->IdentLoc = ReadSourceLocation(Record, Idx);
1340 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1341 D->Namespace = ReadDeclAs<NamedDecl>(Record, Idx);
1342 mergeRedeclarable(D, Redecl);
1343 }
1344
VisitUsingDecl(UsingDecl * D)1345 void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1346 VisitNamedDecl(D);
1347 D->setUsingLoc(ReadSourceLocation(Record, Idx));
1348 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1349 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record, Idx);
1350 D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>(Record, Idx));
1351 D->setTypename(Record[Idx++]);
1352 if (NamedDecl *Pattern = ReadDeclAs<NamedDecl>(Record, Idx))
1353 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1354 mergeMergeable(D);
1355 }
1356
VisitUsingShadowDecl(UsingShadowDecl * D)1357 void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1358 RedeclarableResult Redecl = VisitRedeclarable(D);
1359 VisitNamedDecl(D);
1360 D->setTargetDecl(ReadDeclAs<NamedDecl>(Record, Idx));
1361 D->UsingOrNextShadow = ReadDeclAs<NamedDecl>(Record, Idx);
1362 UsingShadowDecl *Pattern = ReadDeclAs<UsingShadowDecl>(Record, Idx);
1363 if (Pattern)
1364 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1365 mergeRedeclarable(D, Redecl);
1366 }
1367
VisitUsingDirectiveDecl(UsingDirectiveDecl * D)1368 void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1369 VisitNamedDecl(D);
1370 D->UsingLoc = ReadSourceLocation(Record, Idx);
1371 D->NamespaceLoc = ReadSourceLocation(Record, Idx);
1372 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1373 D->NominatedNamespace = ReadDeclAs<NamedDecl>(Record, Idx);
1374 D->CommonAncestor = ReadDeclAs<DeclContext>(Record, Idx);
1375 }
1376
VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl * D)1377 void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1378 VisitValueDecl(D);
1379 D->setUsingLoc(ReadSourceLocation(Record, Idx));
1380 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1381 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record, Idx);
1382 mergeMergeable(D);
1383 }
1384
VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl * D)1385 void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1386 UnresolvedUsingTypenameDecl *D) {
1387 VisitTypeDecl(D);
1388 D->TypenameLocation = ReadSourceLocation(Record, Idx);
1389 D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
1390 mergeMergeable(D);
1391 }
1392
ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData & Data,const RecordData & Record,unsigned & Idx)1393 void ASTDeclReader::ReadCXXDefinitionData(
1394 struct CXXRecordDecl::DefinitionData &Data,
1395 const RecordData &Record, unsigned &Idx) {
1396 // Note: the caller has deserialized the IsLambda bit already.
1397 Data.UserDeclaredConstructor = Record[Idx++];
1398 Data.UserDeclaredSpecialMembers = Record[Idx++];
1399 Data.Aggregate = Record[Idx++];
1400 Data.PlainOldData = Record[Idx++];
1401 Data.Empty = Record[Idx++];
1402 Data.Polymorphic = Record[Idx++];
1403 Data.Abstract = Record[Idx++];
1404 Data.IsStandardLayout = Record[Idx++];
1405 Data.HasNoNonEmptyBases = Record[Idx++];
1406 Data.HasPrivateFields = Record[Idx++];
1407 Data.HasProtectedFields = Record[Idx++];
1408 Data.HasPublicFields = Record[Idx++];
1409 Data.HasMutableFields = Record[Idx++];
1410 Data.HasVariantMembers = Record[Idx++];
1411 Data.HasOnlyCMembers = Record[Idx++];
1412 Data.HasInClassInitializer = Record[Idx++];
1413 Data.HasUninitializedReferenceMember = Record[Idx++];
1414 Data.NeedOverloadResolutionForMoveConstructor = Record[Idx++];
1415 Data.NeedOverloadResolutionForMoveAssignment = Record[Idx++];
1416 Data.NeedOverloadResolutionForDestructor = Record[Idx++];
1417 Data.DefaultedMoveConstructorIsDeleted = Record[Idx++];
1418 Data.DefaultedMoveAssignmentIsDeleted = Record[Idx++];
1419 Data.DefaultedDestructorIsDeleted = Record[Idx++];
1420 Data.HasTrivialSpecialMembers = Record[Idx++];
1421 Data.DeclaredNonTrivialSpecialMembers = Record[Idx++];
1422 Data.HasIrrelevantDestructor = Record[Idx++];
1423 Data.HasConstexprNonCopyMoveConstructor = Record[Idx++];
1424 Data.DefaultedDefaultConstructorIsConstexpr = Record[Idx++];
1425 Data.HasConstexprDefaultConstructor = Record[Idx++];
1426 Data.HasNonLiteralTypeFieldsOrBases = Record[Idx++];
1427 Data.ComputedVisibleConversions = Record[Idx++];
1428 Data.UserProvidedDefaultConstructor = Record[Idx++];
1429 Data.DeclaredSpecialMembers = Record[Idx++];
1430 Data.ImplicitCopyConstructorHasConstParam = Record[Idx++];
1431 Data.ImplicitCopyAssignmentHasConstParam = Record[Idx++];
1432 Data.HasDeclaredCopyConstructorWithConstParam = Record[Idx++];
1433 Data.HasDeclaredCopyAssignmentWithConstParam = Record[Idx++];
1434
1435 Data.NumBases = Record[Idx++];
1436 if (Data.NumBases)
1437 Data.Bases = Reader.readCXXBaseSpecifiers(F, Record, Idx);
1438 Data.NumVBases = Record[Idx++];
1439 if (Data.NumVBases)
1440 Data.VBases = Reader.readCXXBaseSpecifiers(F, Record, Idx);
1441
1442 Reader.ReadUnresolvedSet(F, Data.Conversions, Record, Idx);
1443 Reader.ReadUnresolvedSet(F, Data.VisibleConversions, Record, Idx);
1444 assert(Data.Definition && "Data.Definition should be already set!");
1445 Data.FirstFriend = ReadDeclID(Record, Idx);
1446
1447 if (Data.IsLambda) {
1448 typedef LambdaCapture Capture;
1449 CXXRecordDecl::LambdaDefinitionData &Lambda
1450 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1451 Lambda.Dependent = Record[Idx++];
1452 Lambda.IsGenericLambda = Record[Idx++];
1453 Lambda.CaptureDefault = Record[Idx++];
1454 Lambda.NumCaptures = Record[Idx++];
1455 Lambda.NumExplicitCaptures = Record[Idx++];
1456 Lambda.ManglingNumber = Record[Idx++];
1457 Lambda.ContextDecl = ReadDecl(Record, Idx);
1458 Lambda.Captures
1459 = (Capture*)Reader.Context.Allocate(sizeof(Capture)*Lambda.NumCaptures);
1460 Capture *ToCapture = Lambda.Captures;
1461 Lambda.MethodTyInfo = GetTypeSourceInfo(Record, Idx);
1462 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1463 SourceLocation Loc = ReadSourceLocation(Record, Idx);
1464 bool IsImplicit = Record[Idx++];
1465 LambdaCaptureKind Kind = static_cast<LambdaCaptureKind>(Record[Idx++]);
1466 switch (Kind) {
1467 case LCK_This:
1468 case LCK_VLAType:
1469 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1470 break;
1471 case LCK_ByCopy:
1472 case LCK_ByRef:
1473 VarDecl *Var = ReadDeclAs<VarDecl>(Record, Idx);
1474 SourceLocation EllipsisLoc = ReadSourceLocation(Record, Idx);
1475 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1476 break;
1477 }
1478 }
1479 }
1480 }
1481
MergeDefinitionData(CXXRecordDecl * D,struct CXXRecordDecl::DefinitionData && MergeDD)1482 void ASTDeclReader::MergeDefinitionData(
1483 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1484 assert(D->DefinitionData.getNotUpdated() &&
1485 "merging class definition into non-definition");
1486 auto &DD = *D->DefinitionData.getNotUpdated();
1487
1488 if (DD.Definition != MergeDD.Definition) {
1489 // Track that we merged the definitions.
1490 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1491 DD.Definition));
1492 Reader.PendingDefinitions.erase(MergeDD.Definition);
1493 MergeDD.Definition->IsCompleteDefinition = false;
1494 mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1495 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&
1496 "already loaded pending lookups for merged definition");
1497 }
1498
1499 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1500 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1501 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1502 // We faked up this definition data because we found a class for which we'd
1503 // not yet loaded the definition. Replace it with the real thing now.
1504 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?");
1505 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1506
1507 // Don't change which declaration is the definition; that is required
1508 // to be invariant once we select it.
1509 auto *Def = DD.Definition;
1510 DD = std::move(MergeDD);
1511 DD.Definition = Def;
1512 return;
1513 }
1514
1515 // FIXME: Move this out into a .def file?
1516 bool DetectedOdrViolation = false;
1517 #define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1518 #define MATCH_FIELD(Field) \
1519 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1520 OR_FIELD(Field)
1521 MATCH_FIELD(UserDeclaredConstructor)
1522 MATCH_FIELD(UserDeclaredSpecialMembers)
1523 MATCH_FIELD(Aggregate)
1524 MATCH_FIELD(PlainOldData)
1525 MATCH_FIELD(Empty)
1526 MATCH_FIELD(Polymorphic)
1527 MATCH_FIELD(Abstract)
1528 MATCH_FIELD(IsStandardLayout)
1529 MATCH_FIELD(HasNoNonEmptyBases)
1530 MATCH_FIELD(HasPrivateFields)
1531 MATCH_FIELD(HasProtectedFields)
1532 MATCH_FIELD(HasPublicFields)
1533 MATCH_FIELD(HasMutableFields)
1534 MATCH_FIELD(HasVariantMembers)
1535 MATCH_FIELD(HasOnlyCMembers)
1536 MATCH_FIELD(HasInClassInitializer)
1537 MATCH_FIELD(HasUninitializedReferenceMember)
1538 MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1539 MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1540 MATCH_FIELD(NeedOverloadResolutionForDestructor)
1541 MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1542 MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1543 MATCH_FIELD(DefaultedDestructorIsDeleted)
1544 OR_FIELD(HasTrivialSpecialMembers)
1545 OR_FIELD(DeclaredNonTrivialSpecialMembers)
1546 MATCH_FIELD(HasIrrelevantDestructor)
1547 OR_FIELD(HasConstexprNonCopyMoveConstructor)
1548 MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1549 OR_FIELD(HasConstexprDefaultConstructor)
1550 MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1551 // ComputedVisibleConversions is handled below.
1552 MATCH_FIELD(UserProvidedDefaultConstructor)
1553 OR_FIELD(DeclaredSpecialMembers)
1554 MATCH_FIELD(ImplicitCopyConstructorHasConstParam)
1555 MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1556 OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1557 OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1558 MATCH_FIELD(IsLambda)
1559 #undef OR_FIELD
1560 #undef MATCH_FIELD
1561
1562 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1563 DetectedOdrViolation = true;
1564 // FIXME: Issue a diagnostic if the base classes don't match when we come
1565 // to lazily load them.
1566
1567 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1568 // match when we come to lazily load them.
1569 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1570 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1571 DD.ComputedVisibleConversions = true;
1572 }
1573
1574 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1575 // lazily load it.
1576
1577 if (DD.IsLambda) {
1578 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1579 // when they occur within the body of a function template specialization).
1580 }
1581
1582 if (DetectedOdrViolation)
1583 Reader.PendingOdrMergeFailures[DD.Definition].push_back(MergeDD.Definition);
1584 }
1585
ReadCXXRecordDefinition(CXXRecordDecl * D,bool Update)1586 void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1587 struct CXXRecordDecl::DefinitionData *DD;
1588 ASTContext &C = Reader.getContext();
1589
1590 // Determine whether this is a lambda closure type, so that we can
1591 // allocate the appropriate DefinitionData structure.
1592 bool IsLambda = Record[Idx++];
1593 if (IsLambda)
1594 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1595 LCD_None);
1596 else
1597 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1598
1599 ReadCXXDefinitionData(*DD, Record, Idx);
1600
1601 // We might already have a definition for this record. This can happen either
1602 // because we're reading an update record, or because we've already done some
1603 // merging. Either way, just merge into it.
1604 CXXRecordDecl *Canon = D->getCanonicalDecl();
1605 if (Canon->DefinitionData.getNotUpdated()) {
1606 MergeDefinitionData(Canon, std::move(*DD));
1607 D->DefinitionData = Canon->DefinitionData;
1608 return;
1609 }
1610
1611 // Mark this declaration as being a definition.
1612 D->IsCompleteDefinition = true;
1613 D->DefinitionData = DD;
1614
1615 // If this is not the first declaration or is an update record, we can have
1616 // other redeclarations already. Make a note that we need to propagate the
1617 // DefinitionData pointer onto them.
1618 if (Update || Canon != D) {
1619 Canon->DefinitionData = D->DefinitionData;
1620 Reader.PendingDefinitions.insert(D);
1621 }
1622 }
1623
1624 ASTDeclReader::RedeclarableResult
VisitCXXRecordDeclImpl(CXXRecordDecl * D)1625 ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1626 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1627
1628 ASTContext &C = Reader.getContext();
1629
1630 enum CXXRecKind {
1631 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1632 };
1633 switch ((CXXRecKind)Record[Idx++]) {
1634 case CXXRecNotTemplate:
1635 // Merged when we merge the folding set entry in the primary template.
1636 if (!isa<ClassTemplateSpecializationDecl>(D))
1637 mergeRedeclarable(D, Redecl);
1638 break;
1639 case CXXRecTemplate: {
1640 // Merged when we merge the template.
1641 ClassTemplateDecl *Template = ReadDeclAs<ClassTemplateDecl>(Record, Idx);
1642 D->TemplateOrInstantiation = Template;
1643 if (!Template->getTemplatedDecl()) {
1644 // We've not actually loaded the ClassTemplateDecl yet, because we're
1645 // currently being loaded as its pattern. Rely on it to set up our
1646 // TypeForDecl (see VisitClassTemplateDecl).
1647 //
1648 // Beware: we do not yet know our canonical declaration, and may still
1649 // get merged once the surrounding class template has got off the ground.
1650 TypeIDForTypeDecl = 0;
1651 }
1652 break;
1653 }
1654 case CXXRecMemberSpecialization: {
1655 CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>(Record, Idx);
1656 TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
1657 SourceLocation POI = ReadSourceLocation(Record, Idx);
1658 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1659 MSI->setPointOfInstantiation(POI);
1660 D->TemplateOrInstantiation = MSI;
1661 mergeRedeclarable(D, Redecl);
1662 break;
1663 }
1664 }
1665
1666 bool WasDefinition = Record[Idx++];
1667 if (WasDefinition)
1668 ReadCXXRecordDefinition(D, /*Update*/false);
1669 else
1670 // Propagate DefinitionData pointer from the canonical declaration.
1671 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1672
1673 // Lazily load the key function to avoid deserializing every method so we can
1674 // compute it.
1675 if (WasDefinition) {
1676 DeclID KeyFn = ReadDeclID(Record, Idx);
1677 if (KeyFn && D->IsCompleteDefinition)
1678 // FIXME: This is wrong for the ARM ABI, where some other module may have
1679 // made this function no longer be a key function. We need an update
1680 // record or similar for that case.
1681 C.KeyFunctions[D] = KeyFn;
1682 }
1683
1684 return Redecl;
1685 }
1686
VisitCXXMethodDecl(CXXMethodDecl * D)1687 void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1688 VisitFunctionDecl(D);
1689
1690 unsigned NumOverridenMethods = Record[Idx++];
1691 if (D->isCanonicalDecl()) {
1692 while (NumOverridenMethods--) {
1693 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1694 // MD may be initializing.
1695 if (CXXMethodDecl *MD = ReadDeclAs<CXXMethodDecl>(Record, Idx))
1696 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1697 }
1698 } else {
1699 // We don't care about which declarations this used to override; we get
1700 // the relevant information from the canonical declaration.
1701 Idx += NumOverridenMethods;
1702 }
1703 }
1704
VisitCXXConstructorDecl(CXXConstructorDecl * D)1705 void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1706 VisitCXXMethodDecl(D);
1707
1708 if (auto *CD = ReadDeclAs<CXXConstructorDecl>(Record, Idx))
1709 if (D->isCanonicalDecl())
1710 D->setInheritedConstructor(CD->getCanonicalDecl());
1711 D->IsExplicitSpecified = Record[Idx++];
1712 }
1713
VisitCXXDestructorDecl(CXXDestructorDecl * D)1714 void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1715 VisitCXXMethodDecl(D);
1716
1717 if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>(Record, Idx)) {
1718 auto *Canon = cast<CXXDestructorDecl>(D->getCanonicalDecl());
1719 // FIXME: Check consistency if we have an old and new operator delete.
1720 if (!Canon->OperatorDelete)
1721 Canon->OperatorDelete = OperatorDelete;
1722 }
1723 }
1724
VisitCXXConversionDecl(CXXConversionDecl * D)1725 void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1726 VisitCXXMethodDecl(D);
1727 D->IsExplicitSpecified = Record[Idx++];
1728 }
1729
VisitImportDecl(ImportDecl * D)1730 void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1731 VisitDecl(D);
1732 D->ImportedAndComplete.setPointer(readModule(Record, Idx));
1733 D->ImportedAndComplete.setInt(Record[Idx++]);
1734 SourceLocation *StoredLocs = reinterpret_cast<SourceLocation *>(D + 1);
1735 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1736 StoredLocs[I] = ReadSourceLocation(Record, Idx);
1737 ++Idx; // The number of stored source locations.
1738 }
1739
VisitAccessSpecDecl(AccessSpecDecl * D)1740 void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1741 VisitDecl(D);
1742 D->setColonLoc(ReadSourceLocation(Record, Idx));
1743 }
1744
VisitFriendDecl(FriendDecl * D)1745 void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1746 VisitDecl(D);
1747 if (Record[Idx++]) // hasFriendDecl
1748 D->Friend = ReadDeclAs<NamedDecl>(Record, Idx);
1749 else
1750 D->Friend = GetTypeSourceInfo(Record, Idx);
1751 for (unsigned i = 0; i != D->NumTPLists; ++i)
1752 D->getTPLists()[i] = Reader.ReadTemplateParameterList(F, Record, Idx);
1753 D->NextFriend = ReadDeclID(Record, Idx);
1754 D->UnsupportedFriend = (Record[Idx++] != 0);
1755 D->FriendLoc = ReadSourceLocation(Record, Idx);
1756 }
1757
VisitFriendTemplateDecl(FriendTemplateDecl * D)1758 void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1759 VisitDecl(D);
1760 unsigned NumParams = Record[Idx++];
1761 D->NumParams = NumParams;
1762 D->Params = new TemplateParameterList*[NumParams];
1763 for (unsigned i = 0; i != NumParams; ++i)
1764 D->Params[i] = Reader.ReadTemplateParameterList(F, Record, Idx);
1765 if (Record[Idx++]) // HasFriendDecl
1766 D->Friend = ReadDeclAs<NamedDecl>(Record, Idx);
1767 else
1768 D->Friend = GetTypeSourceInfo(Record, Idx);
1769 D->FriendLoc = ReadSourceLocation(Record, Idx);
1770 }
1771
VisitTemplateDecl(TemplateDecl * D)1772 DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
1773 VisitNamedDecl(D);
1774
1775 DeclID PatternID = ReadDeclID(Record, Idx);
1776 NamedDecl *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
1777 TemplateParameterList* TemplateParams
1778 = Reader.ReadTemplateParameterList(F, Record, Idx);
1779 D->init(TemplatedDecl, TemplateParams);
1780
1781 return PatternID;
1782 }
1783
1784 ASTDeclReader::RedeclarableResult
VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl * D)1785 ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1786 RedeclarableResult Redecl = VisitRedeclarable(D);
1787
1788 // Make sure we've allocated the Common pointer first. We do this before
1789 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
1790 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
1791 if (!CanonD->Common) {
1792 CanonD->Common = CanonD->newCommon(Reader.getContext());
1793 Reader.PendingDefinitions.insert(CanonD);
1794 }
1795 D->Common = CanonD->Common;
1796
1797 // If this is the first declaration of the template, fill in the information
1798 // for the 'common' pointer.
1799 if (ThisDeclID == Redecl.getFirstID()) {
1800 if (RedeclarableTemplateDecl *RTD
1801 = ReadDeclAs<RedeclarableTemplateDecl>(Record, Idx)) {
1802 assert(RTD->getKind() == D->getKind() &&
1803 "InstantiatedFromMemberTemplate kind mismatch");
1804 D->setInstantiatedFromMemberTemplate(RTD);
1805 if (Record[Idx++])
1806 D->setMemberSpecialization();
1807 }
1808 }
1809
1810 DeclID PatternID = VisitTemplateDecl(D);
1811 D->IdentifierNamespace = Record[Idx++];
1812
1813 mergeRedeclarable(D, Redecl, PatternID);
1814
1815 // If we merged the template with a prior declaration chain, merge the common
1816 // pointer.
1817 // FIXME: Actually merge here, don't just overwrite.
1818 D->Common = D->getCanonicalDecl()->Common;
1819
1820 return Redecl;
1821 }
1822
newDeclIDList(ASTContext & Context,DeclID * Old,SmallVectorImpl<DeclID> & IDs)1823 static DeclID *newDeclIDList(ASTContext &Context, DeclID *Old,
1824 SmallVectorImpl<DeclID> &IDs) {
1825 assert(!IDs.empty() && "no IDs to add to list");
1826 if (Old) {
1827 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
1828 std::sort(IDs.begin(), IDs.end());
1829 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
1830 }
1831
1832 auto *Result = new (Context) DeclID[1 + IDs.size()];
1833 *Result = IDs.size();
1834 std::copy(IDs.begin(), IDs.end(), Result + 1);
1835 return Result;
1836 }
1837
VisitClassTemplateDecl(ClassTemplateDecl * D)1838 void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1839 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
1840
1841 if (ThisDeclID == Redecl.getFirstID()) {
1842 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
1843 // the specializations.
1844 SmallVector<serialization::DeclID, 32> SpecIDs;
1845 ReadDeclIDList(SpecIDs);
1846
1847 if (!SpecIDs.empty()) {
1848 auto *CommonPtr = D->getCommonPtr();
1849 CommonPtr->LazySpecializations = newDeclIDList(
1850 Reader.getContext(), CommonPtr->LazySpecializations, SpecIDs);
1851 }
1852 }
1853
1854 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
1855 // We were loaded before our templated declaration was. We've not set up
1856 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
1857 // it now.
1858 Reader.Context.getInjectedClassNameType(
1859 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
1860 }
1861 }
1862
VisitBuiltinTemplateDecl(BuiltinTemplateDecl * D)1863 void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
1864 llvm_unreachable("BuiltinTemplates are not serialized");
1865 }
1866
1867 /// TODO: Unify with ClassTemplateDecl version?
1868 /// May require unifying ClassTemplateDecl and
1869 /// VarTemplateDecl beyond TemplateDecl...
VisitVarTemplateDecl(VarTemplateDecl * D)1870 void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
1871 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
1872
1873 if (ThisDeclID == Redecl.getFirstID()) {
1874 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
1875 // the specializations.
1876 SmallVector<serialization::DeclID, 32> SpecIDs;
1877 ReadDeclIDList(SpecIDs);
1878
1879 if (!SpecIDs.empty()) {
1880 auto *CommonPtr = D->getCommonPtr();
1881 CommonPtr->LazySpecializations = newDeclIDList(
1882 Reader.getContext(), CommonPtr->LazySpecializations, SpecIDs);
1883 }
1884 }
1885 }
1886
1887 ASTDeclReader::RedeclarableResult
VisitClassTemplateSpecializationDeclImpl(ClassTemplateSpecializationDecl * D)1888 ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
1889 ClassTemplateSpecializationDecl *D) {
1890 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
1891
1892 ASTContext &C = Reader.getContext();
1893 if (Decl *InstD = ReadDecl(Record, Idx)) {
1894 if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
1895 D->SpecializedTemplate = CTD;
1896 } else {
1897 SmallVector<TemplateArgument, 8> TemplArgs;
1898 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
1899 TemplateArgumentList *ArgList
1900 = TemplateArgumentList::CreateCopy(C, TemplArgs.data(),
1901 TemplArgs.size());
1902 ClassTemplateSpecializationDecl::SpecializedPartialSpecialization *PS
1903 = new (C) ClassTemplateSpecializationDecl::
1904 SpecializedPartialSpecialization();
1905 PS->PartialSpecialization
1906 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
1907 PS->TemplateArgs = ArgList;
1908 D->SpecializedTemplate = PS;
1909 }
1910 }
1911
1912 SmallVector<TemplateArgument, 8> TemplArgs;
1913 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx,
1914 /*Canonicalize*/ true);
1915 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs.data(),
1916 TemplArgs.size());
1917 D->PointOfInstantiation = ReadSourceLocation(Record, Idx);
1918 D->SpecializationKind = (TemplateSpecializationKind)Record[Idx++];
1919
1920 bool writtenAsCanonicalDecl = Record[Idx++];
1921 if (writtenAsCanonicalDecl) {
1922 ClassTemplateDecl *CanonPattern = ReadDeclAs<ClassTemplateDecl>(Record,Idx);
1923 if (D->isCanonicalDecl()) { // It's kept in the folding set.
1924 // Set this as, or find, the canonical declaration for this specialization
1925 ClassTemplateSpecializationDecl *CanonSpec;
1926 if (ClassTemplatePartialSpecializationDecl *Partial =
1927 dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
1928 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
1929 .GetOrInsertNode(Partial);
1930 } else {
1931 CanonSpec =
1932 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
1933 }
1934 // If there was already a canonical specialization, merge into it.
1935 if (CanonSpec != D) {
1936 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
1937
1938 // This declaration might be a definition. Merge with any existing
1939 // definition.
1940 if (auto *DDD = D->DefinitionData.getNotUpdated()) {
1941 if (CanonSpec->DefinitionData.getNotUpdated())
1942 MergeDefinitionData(CanonSpec, std::move(*DDD));
1943 else
1944 CanonSpec->DefinitionData = D->DefinitionData;
1945 }
1946 D->DefinitionData = CanonSpec->DefinitionData;
1947 }
1948 }
1949 }
1950
1951 // Explicit info.
1952 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo(Record, Idx)) {
1953 ClassTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo
1954 = new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
1955 ExplicitInfo->TypeAsWritten = TyInfo;
1956 ExplicitInfo->ExternLoc = ReadSourceLocation(Record, Idx);
1957 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation(Record, Idx);
1958 D->ExplicitInfo = ExplicitInfo;
1959 }
1960
1961 return Redecl;
1962 }
1963
VisitClassTemplatePartialSpecializationDecl(ClassTemplatePartialSpecializationDecl * D)1964 void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
1965 ClassTemplatePartialSpecializationDecl *D) {
1966 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
1967
1968 D->TemplateParams = Reader.ReadTemplateParameterList(F, Record, Idx);
1969 D->ArgsAsWritten = Reader.ReadASTTemplateArgumentListInfo(F, Record, Idx);
1970
1971 // These are read/set from/to the first declaration.
1972 if (ThisDeclID == Redecl.getFirstID()) {
1973 D->InstantiatedFromMember.setPointer(
1974 ReadDeclAs<ClassTemplatePartialSpecializationDecl>(Record, Idx));
1975 D->InstantiatedFromMember.setInt(Record[Idx++]);
1976 }
1977 }
1978
VisitClassScopeFunctionSpecializationDecl(ClassScopeFunctionSpecializationDecl * D)1979 void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
1980 ClassScopeFunctionSpecializationDecl *D) {
1981 VisitDecl(D);
1982 D->Specialization = ReadDeclAs<CXXMethodDecl>(Record, Idx);
1983 }
1984
VisitFunctionTemplateDecl(FunctionTemplateDecl * D)1985 void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1986 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
1987
1988 if (ThisDeclID == Redecl.getFirstID()) {
1989 // This FunctionTemplateDecl owns a CommonPtr; read it.
1990 SmallVector<serialization::DeclID, 32> SpecIDs;
1991 ReadDeclIDList(SpecIDs);
1992
1993 if (!SpecIDs.empty()) {
1994 auto *CommonPtr = D->getCommonPtr();
1995 CommonPtr->LazySpecializations = newDeclIDList(
1996 Reader.getContext(), CommonPtr->LazySpecializations, SpecIDs);
1997 }
1998 }
1999 }
2000
2001 /// TODO: Unify with ClassTemplateSpecializationDecl version?
2002 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2003 /// VarTemplate(Partial)SpecializationDecl with a new data
2004 /// structure Template(Partial)SpecializationDecl, and
2005 /// using Template(Partial)SpecializationDecl as input type.
2006 ASTDeclReader::RedeclarableResult
VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl * D)2007 ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2008 VarTemplateSpecializationDecl *D) {
2009 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2010
2011 ASTContext &C = Reader.getContext();
2012 if (Decl *InstD = ReadDecl(Record, Idx)) {
2013 if (VarTemplateDecl *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2014 D->SpecializedTemplate = VTD;
2015 } else {
2016 SmallVector<TemplateArgument, 8> TemplArgs;
2017 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
2018 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2019 C, TemplArgs.data(), TemplArgs.size());
2020 VarTemplateSpecializationDecl::SpecializedPartialSpecialization *PS =
2021 new (C)
2022 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2023 PS->PartialSpecialization =
2024 cast<VarTemplatePartialSpecializationDecl>(InstD);
2025 PS->TemplateArgs = ArgList;
2026 D->SpecializedTemplate = PS;
2027 }
2028 }
2029
2030 // Explicit info.
2031 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo(Record, Idx)) {
2032 VarTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo =
2033 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2034 ExplicitInfo->TypeAsWritten = TyInfo;
2035 ExplicitInfo->ExternLoc = ReadSourceLocation(Record, Idx);
2036 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation(Record, Idx);
2037 D->ExplicitInfo = ExplicitInfo;
2038 }
2039
2040 SmallVector<TemplateArgument, 8> TemplArgs;
2041 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx,
2042 /*Canonicalize*/ true);
2043 D->TemplateArgs =
2044 TemplateArgumentList::CreateCopy(C, TemplArgs.data(), TemplArgs.size());
2045 D->PointOfInstantiation = ReadSourceLocation(Record, Idx);
2046 D->SpecializationKind = (TemplateSpecializationKind)Record[Idx++];
2047
2048 bool writtenAsCanonicalDecl = Record[Idx++];
2049 if (writtenAsCanonicalDecl) {
2050 VarTemplateDecl *CanonPattern = ReadDeclAs<VarTemplateDecl>(Record, Idx);
2051 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2052 // FIXME: If it's already present, merge it.
2053 if (VarTemplatePartialSpecializationDecl *Partial =
2054 dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2055 CanonPattern->getCommonPtr()->PartialSpecializations
2056 .GetOrInsertNode(Partial);
2057 } else {
2058 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2059 }
2060 }
2061 }
2062
2063 return Redecl;
2064 }
2065
2066 /// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2067 /// May require unifying ClassTemplate(Partial)SpecializationDecl and
2068 /// VarTemplate(Partial)SpecializationDecl with a new data
2069 /// structure Template(Partial)SpecializationDecl, and
2070 /// using Template(Partial)SpecializationDecl as input type.
VisitVarTemplatePartialSpecializationDecl(VarTemplatePartialSpecializationDecl * D)2071 void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2072 VarTemplatePartialSpecializationDecl *D) {
2073 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2074
2075 D->TemplateParams = Reader.ReadTemplateParameterList(F, Record, Idx);
2076 D->ArgsAsWritten = Reader.ReadASTTemplateArgumentListInfo(F, Record, Idx);
2077
2078 // These are read/set from/to the first declaration.
2079 if (ThisDeclID == Redecl.getFirstID()) {
2080 D->InstantiatedFromMember.setPointer(
2081 ReadDeclAs<VarTemplatePartialSpecializationDecl>(Record, Idx));
2082 D->InstantiatedFromMember.setInt(Record[Idx++]);
2083 }
2084 }
2085
VisitTemplateTypeParmDecl(TemplateTypeParmDecl * D)2086 void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2087 VisitTypeDecl(D);
2088
2089 D->setDeclaredWithTypename(Record[Idx++]);
2090
2091 if (Record[Idx++])
2092 D->setDefaultArgument(GetTypeSourceInfo(Record, Idx));
2093 }
2094
VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl * D)2095 void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2096 VisitDeclaratorDecl(D);
2097 // TemplateParmPosition.
2098 D->setDepth(Record[Idx++]);
2099 D->setPosition(Record[Idx++]);
2100 if (D->isExpandedParameterPack()) {
2101 void **Data = reinterpret_cast<void **>(D + 1);
2102 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2103 Data[2*I] = Reader.readType(F, Record, Idx).getAsOpaquePtr();
2104 Data[2*I + 1] = GetTypeSourceInfo(Record, Idx);
2105 }
2106 } else {
2107 // Rest of NonTypeTemplateParmDecl.
2108 D->ParameterPack = Record[Idx++];
2109 if (Record[Idx++])
2110 D->setDefaultArgument(Reader.ReadExpr(F));
2111 }
2112 }
2113
VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl * D)2114 void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2115 VisitTemplateDecl(D);
2116 // TemplateParmPosition.
2117 D->setDepth(Record[Idx++]);
2118 D->setPosition(Record[Idx++]);
2119 if (D->isExpandedParameterPack()) {
2120 void **Data = reinterpret_cast<void **>(D + 1);
2121 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2122 I != N; ++I)
2123 Data[I] = Reader.ReadTemplateParameterList(F, Record, Idx);
2124 } else {
2125 // Rest of TemplateTemplateParmDecl.
2126 D->ParameterPack = Record[Idx++];
2127 if (Record[Idx++])
2128 D->setDefaultArgument(Reader.getContext(),
2129 Reader.ReadTemplateArgumentLoc(F, Record, Idx));
2130 }
2131 }
2132
VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl * D)2133 void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2134 VisitRedeclarableTemplateDecl(D);
2135 }
2136
VisitStaticAssertDecl(StaticAssertDecl * D)2137 void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2138 VisitDecl(D);
2139 D->AssertExprAndFailed.setPointer(Reader.ReadExpr(F));
2140 D->AssertExprAndFailed.setInt(Record[Idx++]);
2141 D->Message = cast<StringLiteral>(Reader.ReadExpr(F));
2142 D->RParenLoc = ReadSourceLocation(Record, Idx);
2143 }
2144
VisitEmptyDecl(EmptyDecl * D)2145 void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2146 VisitDecl(D);
2147 }
2148
2149 std::pair<uint64_t, uint64_t>
VisitDeclContext(DeclContext * DC)2150 ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2151 uint64_t LexicalOffset = Record[Idx++];
2152 uint64_t VisibleOffset = Record[Idx++];
2153 return std::make_pair(LexicalOffset, VisibleOffset);
2154 }
2155
2156 template <typename T>
2157 ASTDeclReader::RedeclarableResult
VisitRedeclarable(Redeclarable<T> * D)2158 ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2159 DeclID FirstDeclID = ReadDeclID(Record, Idx);
2160 Decl *MergeWith = nullptr;
2161
2162 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2163 bool IsFirstLocalDecl = false;
2164
2165 uint64_t RedeclOffset = 0;
2166
2167 // 0 indicates that this declaration was the only declaration of its entity,
2168 // and is used for space optimization.
2169 if (FirstDeclID == 0) {
2170 FirstDeclID = ThisDeclID;
2171 IsKeyDecl = true;
2172 IsFirstLocalDecl = true;
2173 } else if (unsigned N = Record[Idx++]) {
2174 // This declaration was the first local declaration, but may have imported
2175 // other declarations.
2176 IsKeyDecl = N == 1;
2177 IsFirstLocalDecl = true;
2178
2179 // We have some declarations that must be before us in our redeclaration
2180 // chain. Read them now, and remember that we ought to merge with one of
2181 // them.
2182 // FIXME: Provide a known merge target to the second and subsequent such
2183 // declaration.
2184 for (unsigned I = 0; I != N - 1; ++I)
2185 MergeWith = ReadDecl(Record, Idx/*, MergeWith*/);
2186
2187 RedeclOffset = Record[Idx++];
2188 } else {
2189 // This declaration was not the first local declaration. Read the first
2190 // local declaration now, to trigger the import of other redeclarations.
2191 (void)ReadDecl(Record, Idx);
2192 }
2193
2194 T *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2195 if (FirstDecl != D) {
2196 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2197 // We temporarily set the first (canonical) declaration as the previous one
2198 // which is the one that matters and mark the real previous DeclID to be
2199 // loaded & attached later on.
2200 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2201 D->First = FirstDecl->getCanonicalDecl();
2202 }
2203
2204 T *DAsT = static_cast<T*>(D);
2205
2206 // Note that we need to load local redeclarations of this decl and build a
2207 // decl chain for them. This must happen *after* we perform the preloading
2208 // above; this ensures that the redeclaration chain is built in the correct
2209 // order.
2210 if (IsFirstLocalDecl)
2211 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2212
2213 return RedeclarableResult(FirstDeclID, MergeWith, IsKeyDecl);
2214 }
2215
2216 /// \brief Attempts to merge the given declaration (D) with another declaration
2217 /// of the same entity.
2218 template<typename T>
mergeRedeclarable(Redeclarable<T> * DBase,RedeclarableResult & Redecl,DeclID TemplatePatternID)2219 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2220 RedeclarableResult &Redecl,
2221 DeclID TemplatePatternID) {
2222 T *D = static_cast<T*>(DBase);
2223
2224 // If modules are not available, there is no reason to perform this merge.
2225 if (!Reader.getContext().getLangOpts().Modules)
2226 return;
2227
2228 // If we're not the canonical declaration, we don't need to merge.
2229 if (!DBase->isFirstDecl())
2230 return;
2231
2232 if (auto *Existing = Redecl.getKnownMergeTarget())
2233 // We already know of an existing declaration we should merge with.
2234 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2235 else if (FindExistingResult ExistingRes = findExisting(D))
2236 if (T *Existing = ExistingRes)
2237 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2238 }
2239
2240 /// \brief "Cast" to type T, asserting if we don't have an implicit conversion.
2241 /// We use this to put code in a template that will only be valid for certain
2242 /// instantiations.
assert_cast(T t)2243 template<typename T> static T assert_cast(T t) { return t; }
assert_cast(...)2244 template<typename T> static T assert_cast(...) {
2245 llvm_unreachable("bad assert_cast");
2246 }
2247
2248 /// \brief Merge together the pattern declarations from two template
2249 /// declarations.
mergeTemplatePattern(RedeclarableTemplateDecl * D,RedeclarableTemplateDecl * Existing,DeclID DsID,bool IsKeyDecl)2250 void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2251 RedeclarableTemplateDecl *Existing,
2252 DeclID DsID, bool IsKeyDecl) {
2253 auto *DPattern = D->getTemplatedDecl();
2254 auto *ExistingPattern = Existing->getTemplatedDecl();
2255 RedeclarableResult Result(DPattern->getCanonicalDecl()->getGlobalID(),
2256 /*MergeWith*/ ExistingPattern, IsKeyDecl);
2257
2258 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2259 // Merge with any existing definition.
2260 // FIXME: This is duplicated in several places. Refactor.
2261 auto *ExistingClass =
2262 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2263 if (auto *DDD = DClass->DefinitionData.getNotUpdated()) {
2264 if (ExistingClass->DefinitionData.getNotUpdated()) {
2265 MergeDefinitionData(ExistingClass, std::move(*DDD));
2266 } else {
2267 ExistingClass->DefinitionData = DClass->DefinitionData;
2268 // We may have skipped this before because we thought that DClass
2269 // was the canonical declaration.
2270 Reader.PendingDefinitions.insert(DClass);
2271 }
2272 }
2273 DClass->DefinitionData = ExistingClass->DefinitionData;
2274
2275 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2276 Result);
2277 }
2278 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2279 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2280 Result);
2281 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2282 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2283 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2284 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2285 Result);
2286 llvm_unreachable("merged an unknown kind of redeclarable template");
2287 }
2288
2289 /// \brief Attempts to merge the given declaration (D) with another declaration
2290 /// of the same entity.
2291 template<typename T>
mergeRedeclarable(Redeclarable<T> * DBase,T * Existing,RedeclarableResult & Redecl,DeclID TemplatePatternID)2292 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2293 RedeclarableResult &Redecl,
2294 DeclID TemplatePatternID) {
2295 T *D = static_cast<T*>(DBase);
2296 T *ExistingCanon = Existing->getCanonicalDecl();
2297 T *DCanon = D->getCanonicalDecl();
2298 if (ExistingCanon != DCanon) {
2299 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&
2300 "already merged this declaration");
2301
2302 // Have our redeclaration link point back at the canonical declaration
2303 // of the existing declaration, so that this declaration has the
2304 // appropriate canonical declaration.
2305 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2306 D->First = ExistingCanon;
2307
2308 // When we merge a namespace, update its pointer to the first namespace.
2309 // We cannot have loaded any redeclarations of this declaration yet, so
2310 // there's nothing else that needs to be updated.
2311 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2312 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2313 assert_cast<NamespaceDecl*>(ExistingCanon));
2314
2315 // When we merge a template, merge its pattern.
2316 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2317 mergeTemplatePattern(
2318 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2319 TemplatePatternID, Redecl.isKeyDecl());
2320
2321 // If this declaration is a key declaration, make a note of that.
2322 if (Redecl.isKeyDecl())
2323 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2324 }
2325 }
2326
2327 /// \brief Attempts to merge the given declaration (D) with another declaration
2328 /// of the same entity, for the case where the entity is not actually
2329 /// redeclarable. This happens, for instance, when merging the fields of
2330 /// identical class definitions from two different modules.
2331 template<typename T>
mergeMergeable(Mergeable<T> * D)2332 void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2333 // If modules are not available, there is no reason to perform this merge.
2334 if (!Reader.getContext().getLangOpts().Modules)
2335 return;
2336
2337 // ODR-based merging is only performed in C++. In C, identically-named things
2338 // in different translation units are not redeclarations (but may still have
2339 // compatible types).
2340 if (!Reader.getContext().getLangOpts().CPlusPlus)
2341 return;
2342
2343 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2344 if (T *Existing = ExistingRes)
2345 Reader.Context.setPrimaryMergedDecl(static_cast<T*>(D),
2346 Existing->getCanonicalDecl());
2347 }
2348
VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl * D)2349 void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2350 VisitDecl(D);
2351 unsigned NumVars = D->varlist_size();
2352 SmallVector<Expr *, 16> Vars;
2353 Vars.reserve(NumVars);
2354 for (unsigned i = 0; i != NumVars; ++i) {
2355 Vars.push_back(Reader.ReadExpr(F));
2356 }
2357 D->setVars(Vars);
2358 }
2359
2360 //===----------------------------------------------------------------------===//
2361 // Attribute Reading
2362 //===----------------------------------------------------------------------===//
2363
2364 /// \brief Reads attributes from the current stream position.
ReadAttributes(ModuleFile & F,AttrVec & Attrs,const RecordData & Record,unsigned & Idx)2365 void ASTReader::ReadAttributes(ModuleFile &F, AttrVec &Attrs,
2366 const RecordData &Record, unsigned &Idx) {
2367 for (unsigned i = 0, e = Record[Idx++]; i != e; ++i) {
2368 Attr *New = nullptr;
2369 attr::Kind Kind = (attr::Kind)Record[Idx++];
2370 SourceRange Range = ReadSourceRange(F, Record, Idx);
2371
2372 #include "clang/Serialization/AttrPCHRead.inc"
2373
2374 assert(New && "Unable to decode attribute?");
2375 Attrs.push_back(New);
2376 }
2377 }
2378
2379 //===----------------------------------------------------------------------===//
2380 // ASTReader Implementation
2381 //===----------------------------------------------------------------------===//
2382
2383 /// \brief Note that we have loaded the declaration with the given
2384 /// Index.
2385 ///
2386 /// This routine notes that this declaration has already been loaded,
2387 /// so that future GetDecl calls will return this declaration rather
2388 /// than trying to load a new declaration.
LoadedDecl(unsigned Index,Decl * D)2389 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2390 assert(!DeclsLoaded[Index] && "Decl loaded twice?");
2391 DeclsLoaded[Index] = D;
2392 }
2393
2394
2395 /// \brief Determine whether the consumer will be interested in seeing
2396 /// this declaration (via HandleTopLevelDecl).
2397 ///
2398 /// This routine should return true for anything that might affect
2399 /// code generation, e.g., inline function definitions, Objective-C
2400 /// declarations with metadata, etc.
isConsumerInterestedIn(Decl * D,bool HasBody)2401 static bool isConsumerInterestedIn(Decl *D, bool HasBody) {
2402 // An ObjCMethodDecl is never considered as "interesting" because its
2403 // implementation container always is.
2404
2405 if (isa<FileScopeAsmDecl>(D) ||
2406 isa<ObjCProtocolDecl>(D) ||
2407 isa<ObjCImplDecl>(D) ||
2408 isa<ImportDecl>(D) ||
2409 isa<OMPThreadPrivateDecl>(D))
2410 return true;
2411 if (VarDecl *Var = dyn_cast<VarDecl>(D))
2412 return Var->isFileVarDecl() &&
2413 Var->isThisDeclarationADefinition() == VarDecl::Definition;
2414 if (FunctionDecl *Func = dyn_cast<FunctionDecl>(D))
2415 return Func->doesThisDeclarationHaveABody() || HasBody;
2416
2417 return false;
2418 }
2419
2420 /// \brief Get the correct cursor and offset for loading a declaration.
2421 ASTReader::RecordLocation
DeclCursorForID(DeclID ID,unsigned & RawLocation)2422 ASTReader::DeclCursorForID(DeclID ID, unsigned &RawLocation) {
2423 // See if there's an override.
2424 DeclReplacementMap::iterator It = ReplacedDecls.find(ID);
2425 if (It != ReplacedDecls.end()) {
2426 RawLocation = It->second.RawLoc;
2427 return RecordLocation(It->second.Mod, It->second.Offset);
2428 }
2429
2430 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2431 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
2432 ModuleFile *M = I->second;
2433 const DeclOffset &
2434 DOffs = M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2435 RawLocation = DOffs.Loc;
2436 return RecordLocation(M, DOffs.BitOffset);
2437 }
2438
getLocalBitOffset(uint64_t GlobalOffset)2439 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2440 ContinuousRangeMap<uint64_t, ModuleFile*, 4>::iterator I
2441 = GlobalBitOffsetsMap.find(GlobalOffset);
2442
2443 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
2444 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2445 }
2446
getGlobalBitOffset(ModuleFile & M,uint32_t LocalOffset)2447 uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2448 return LocalOffset + M.GlobalBitOffset;
2449 }
2450
2451 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2452 const TemplateParameterList *Y);
2453
2454 /// \brief Determine whether two template parameters are similar enough
2455 /// that they may be used in declarations of the same template.
isSameTemplateParameter(const NamedDecl * X,const NamedDecl * Y)2456 static bool isSameTemplateParameter(const NamedDecl *X,
2457 const NamedDecl *Y) {
2458 if (X->getKind() != Y->getKind())
2459 return false;
2460
2461 if (const TemplateTypeParmDecl *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2462 const TemplateTypeParmDecl *TY = cast<TemplateTypeParmDecl>(Y);
2463 return TX->isParameterPack() == TY->isParameterPack();
2464 }
2465
2466 if (const NonTypeTemplateParmDecl *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2467 const NonTypeTemplateParmDecl *TY = cast<NonTypeTemplateParmDecl>(Y);
2468 return TX->isParameterPack() == TY->isParameterPack() &&
2469 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2470 }
2471
2472 const TemplateTemplateParmDecl *TX = cast<TemplateTemplateParmDecl>(X);
2473 const TemplateTemplateParmDecl *TY = cast<TemplateTemplateParmDecl>(Y);
2474 return TX->isParameterPack() == TY->isParameterPack() &&
2475 isSameTemplateParameterList(TX->getTemplateParameters(),
2476 TY->getTemplateParameters());
2477 }
2478
getNamespace(const NestedNameSpecifier * X)2479 static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2480 if (auto *NS = X->getAsNamespace())
2481 return NS;
2482 if (auto *NAS = X->getAsNamespaceAlias())
2483 return NAS->getNamespace();
2484 return nullptr;
2485 }
2486
isSameQualifier(const NestedNameSpecifier * X,const NestedNameSpecifier * Y)2487 static bool isSameQualifier(const NestedNameSpecifier *X,
2488 const NestedNameSpecifier *Y) {
2489 if (auto *NSX = getNamespace(X)) {
2490 auto *NSY = getNamespace(Y);
2491 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2492 return false;
2493 } else if (X->getKind() != Y->getKind())
2494 return false;
2495
2496 // FIXME: For namespaces and types, we're permitted to check that the entity
2497 // is named via the same tokens. We should probably do so.
2498 switch (X->getKind()) {
2499 case NestedNameSpecifier::Identifier:
2500 if (X->getAsIdentifier() != Y->getAsIdentifier())
2501 return false;
2502 break;
2503 case NestedNameSpecifier::Namespace:
2504 case NestedNameSpecifier::NamespaceAlias:
2505 // We've already checked that we named the same namespace.
2506 break;
2507 case NestedNameSpecifier::TypeSpec:
2508 case NestedNameSpecifier::TypeSpecWithTemplate:
2509 if (X->getAsType()->getCanonicalTypeInternal() !=
2510 Y->getAsType()->getCanonicalTypeInternal())
2511 return false;
2512 break;
2513 case NestedNameSpecifier::Global:
2514 case NestedNameSpecifier::Super:
2515 return true;
2516 }
2517
2518 // Recurse into earlier portion of NNS, if any.
2519 auto *PX = X->getPrefix();
2520 auto *PY = Y->getPrefix();
2521 if (PX && PY)
2522 return isSameQualifier(PX, PY);
2523 return !PX && !PY;
2524 }
2525
2526 /// \brief Determine whether two template parameter lists are similar enough
2527 /// that they may be used in declarations of the same template.
isSameTemplateParameterList(const TemplateParameterList * X,const TemplateParameterList * Y)2528 static bool isSameTemplateParameterList(const TemplateParameterList *X,
2529 const TemplateParameterList *Y) {
2530 if (X->size() != Y->size())
2531 return false;
2532
2533 for (unsigned I = 0, N = X->size(); I != N; ++I)
2534 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2535 return false;
2536
2537 return true;
2538 }
2539
2540 /// \brief Determine whether the two declarations refer to the same entity.
isSameEntity(NamedDecl * X,NamedDecl * Y)2541 static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2542 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!");
2543
2544 if (X == Y)
2545 return true;
2546
2547 // Must be in the same context.
2548 if (!X->getDeclContext()->getRedeclContext()->Equals(
2549 Y->getDeclContext()->getRedeclContext()))
2550 return false;
2551
2552 // Two typedefs refer to the same entity if they have the same underlying
2553 // type.
2554 if (TypedefNameDecl *TypedefX = dyn_cast<TypedefNameDecl>(X))
2555 if (TypedefNameDecl *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2556 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2557 TypedefY->getUnderlyingType());
2558
2559 // Must have the same kind.
2560 if (X->getKind() != Y->getKind())
2561 return false;
2562
2563 // Objective-C classes and protocols with the same name always match.
2564 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2565 return true;
2566
2567 if (isa<ClassTemplateSpecializationDecl>(X)) {
2568 // No need to handle these here: we merge them when adding them to the
2569 // template.
2570 return false;
2571 }
2572
2573 // Compatible tags match.
2574 if (TagDecl *TagX = dyn_cast<TagDecl>(X)) {
2575 TagDecl *TagY = cast<TagDecl>(Y);
2576 return (TagX->getTagKind() == TagY->getTagKind()) ||
2577 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2578 TagX->getTagKind() == TTK_Interface) &&
2579 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2580 TagY->getTagKind() == TTK_Interface));
2581 }
2582
2583 // Functions with the same type and linkage match.
2584 // FIXME: This needs to cope with merging of prototyped/non-prototyped
2585 // functions, etc.
2586 if (FunctionDecl *FuncX = dyn_cast<FunctionDecl>(X)) {
2587 FunctionDecl *FuncY = cast<FunctionDecl>(Y);
2588 return (FuncX->getLinkageInternal() == FuncY->getLinkageInternal()) &&
2589 FuncX->getASTContext().hasSameType(FuncX->getType(), FuncY->getType());
2590 }
2591
2592 // Variables with the same type and linkage match.
2593 if (VarDecl *VarX = dyn_cast<VarDecl>(X)) {
2594 VarDecl *VarY = cast<VarDecl>(Y);
2595 return (VarX->getLinkageInternal() == VarY->getLinkageInternal()) &&
2596 VarX->getASTContext().hasSameType(VarX->getType(), VarY->getType());
2597 }
2598
2599 // Namespaces with the same name and inlinedness match.
2600 if (NamespaceDecl *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
2601 NamespaceDecl *NamespaceY = cast<NamespaceDecl>(Y);
2602 return NamespaceX->isInline() == NamespaceY->isInline();
2603 }
2604
2605 // Identical template names and kinds match if their template parameter lists
2606 // and patterns match.
2607 if (TemplateDecl *TemplateX = dyn_cast<TemplateDecl>(X)) {
2608 TemplateDecl *TemplateY = cast<TemplateDecl>(Y);
2609 return isSameEntity(TemplateX->getTemplatedDecl(),
2610 TemplateY->getTemplatedDecl()) &&
2611 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
2612 TemplateY->getTemplateParameters());
2613 }
2614
2615 // Fields with the same name and the same type match.
2616 if (FieldDecl *FDX = dyn_cast<FieldDecl>(X)) {
2617 FieldDecl *FDY = cast<FieldDecl>(Y);
2618 // FIXME: Also check the bitwidth is odr-equivalent, if any.
2619 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
2620 }
2621
2622 // Indirect fields with the same target field match.
2623 if (auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
2624 auto *IFDY = cast<IndirectFieldDecl>(Y);
2625 return IFDX->getAnonField()->getCanonicalDecl() ==
2626 IFDY->getAnonField()->getCanonicalDecl();
2627 }
2628
2629 // Enumerators with the same name match.
2630 if (isa<EnumConstantDecl>(X))
2631 // FIXME: Also check the value is odr-equivalent.
2632 return true;
2633
2634 // Using shadow declarations with the same target match.
2635 if (UsingShadowDecl *USX = dyn_cast<UsingShadowDecl>(X)) {
2636 UsingShadowDecl *USY = cast<UsingShadowDecl>(Y);
2637 return USX->getTargetDecl() == USY->getTargetDecl();
2638 }
2639
2640 // Using declarations with the same qualifier match. (We already know that
2641 // the name matches.)
2642 if (auto *UX = dyn_cast<UsingDecl>(X)) {
2643 auto *UY = cast<UsingDecl>(Y);
2644 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2645 UX->hasTypename() == UY->hasTypename() &&
2646 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2647 }
2648 if (auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
2649 auto *UY = cast<UnresolvedUsingValueDecl>(Y);
2650 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2651 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2652 }
2653 if (auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
2654 return isSameQualifier(
2655 UX->getQualifier(),
2656 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
2657
2658 // Namespace alias definitions with the same target match.
2659 if (auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
2660 auto *NAY = cast<NamespaceAliasDecl>(Y);
2661 return NAX->getNamespace()->Equals(NAY->getNamespace());
2662 }
2663
2664 return false;
2665 }
2666
2667 /// Find the context in which we should search for previous declarations when
2668 /// looking for declarations to merge.
getPrimaryContextForMerging(ASTReader & Reader,DeclContext * DC)2669 DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
2670 DeclContext *DC) {
2671 if (NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC))
2672 return ND->getOriginalNamespace();
2673
2674 if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) {
2675 // Try to dig out the definition.
2676 auto *DD = RD->DefinitionData.getNotUpdated();
2677 if (!DD)
2678 DD = RD->getCanonicalDecl()->DefinitionData.getNotUpdated();
2679
2680 // If there's no definition yet, then DC's definition is added by an update
2681 // record, but we've not yet loaded that update record. In this case, we
2682 // commit to DC being the canonical definition now, and will fix this when
2683 // we load the update record.
2684 if (!DD) {
2685 DD = new (Reader.Context) struct CXXRecordDecl::DefinitionData(RD);
2686 RD->IsCompleteDefinition = true;
2687 RD->DefinitionData = DD;
2688 RD->getCanonicalDecl()->DefinitionData = DD;
2689
2690 // Track that we did this horrible thing so that we can fix it later.
2691 Reader.PendingFakeDefinitionData.insert(
2692 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
2693 }
2694
2695 return DD->Definition;
2696 }
2697
2698 if (EnumDecl *ED = dyn_cast<EnumDecl>(DC))
2699 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
2700 : nullptr;
2701
2702 // We can see the TU here only if we have no Sema object. In that case,
2703 // there's no TU scope to look in, so using the DC alone is sufficient.
2704 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
2705 return TU;
2706
2707 return nullptr;
2708 }
2709
~FindExistingResult()2710 ASTDeclReader::FindExistingResult::~FindExistingResult() {
2711 // Record that we had a typedef name for linkage whether or not we merge
2712 // with that declaration.
2713 if (TypedefNameForLinkage) {
2714 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2715 Reader.ImportedTypedefNamesForLinkage.insert(
2716 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
2717 return;
2718 }
2719
2720 if (!AddResult || Existing)
2721 return;
2722
2723 DeclarationName Name = New->getDeclName();
2724 DeclContext *DC = New->getDeclContext()->getRedeclContext();
2725 if (needsAnonymousDeclarationNumber(New)) {
2726 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
2727 AnonymousDeclNumber, New);
2728 } else if (DC->isTranslationUnit() && Reader.SemaObj &&
2729 !Reader.getContext().getLangOpts().CPlusPlus) {
2730 if (Reader.SemaObj->IdResolver.tryAddTopLevelDecl(New, Name))
2731 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
2732 .push_back(New);
2733 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
2734 // Add the declaration to its redeclaration context so later merging
2735 // lookups will find it.
2736 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
2737 }
2738 }
2739
2740 /// Find the declaration that should be merged into, given the declaration found
2741 /// by name lookup. If we're merging an anonymous declaration within a typedef,
2742 /// we need a matching typedef, and we merge with the type inside it.
getDeclForMerging(NamedDecl * Found,bool IsTypedefNameForLinkage)2743 static NamedDecl *getDeclForMerging(NamedDecl *Found,
2744 bool IsTypedefNameForLinkage) {
2745 if (!IsTypedefNameForLinkage)
2746 return Found;
2747
2748 // If we found a typedef declaration that gives a name to some other
2749 // declaration, then we want that inner declaration. Declarations from
2750 // AST files are handled via ImportedTypedefNamesForLinkage.
2751 if (Found->isFromASTFile())
2752 return nullptr;
2753
2754 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
2755 return TND->getAnonDeclWithTypedefName();
2756
2757 return nullptr;
2758 }
2759
getAnonymousDeclForMerging(ASTReader & Reader,DeclContext * DC,unsigned Index)2760 NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
2761 DeclContext *DC,
2762 unsigned Index) {
2763 // If the lexical context has been merged, look into the now-canonical
2764 // definition.
2765 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
2766 DC = Merged;
2767
2768 // If we've seen this before, return the canonical declaration.
2769 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
2770 if (Index < Previous.size() && Previous[Index])
2771 return Previous[Index];
2772
2773 // If this is the first time, but we have parsed a declaration of the context,
2774 // build the anonymous declaration list from the parsed declaration.
2775 if (!cast<Decl>(DC)->isFromASTFile()) {
2776 numberAnonymousDeclsWithin(DC, [&](NamedDecl *ND, unsigned Number) {
2777 if (Previous.size() == Number)
2778 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
2779 else
2780 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
2781 });
2782 }
2783
2784 return Index < Previous.size() ? Previous[Index] : nullptr;
2785 }
2786
setAnonymousDeclForMerging(ASTReader & Reader,DeclContext * DC,unsigned Index,NamedDecl * D)2787 void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
2788 DeclContext *DC, unsigned Index,
2789 NamedDecl *D) {
2790 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
2791 DC = Merged;
2792
2793 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
2794 if (Index >= Previous.size())
2795 Previous.resize(Index + 1);
2796 if (!Previous[Index])
2797 Previous[Index] = D;
2798 }
2799
findExisting(NamedDecl * D)2800 ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
2801 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
2802 : D->getDeclName();
2803
2804 if (!Name && !needsAnonymousDeclarationNumber(D)) {
2805 // Don't bother trying to find unnamed declarations that are in
2806 // unmergeable contexts.
2807 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
2808 AnonymousDeclNumber, TypedefNameForLinkage);
2809 Result.suppress();
2810 return Result;
2811 }
2812
2813 DeclContext *DC = D->getDeclContext()->getRedeclContext();
2814 if (TypedefNameForLinkage) {
2815 auto It = Reader.ImportedTypedefNamesForLinkage.find(
2816 std::make_pair(DC, TypedefNameForLinkage));
2817 if (It != Reader.ImportedTypedefNamesForLinkage.end())
2818 if (isSameEntity(It->second, D))
2819 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
2820 TypedefNameForLinkage);
2821 // Go on to check in other places in case an existing typedef name
2822 // was not imported.
2823 }
2824
2825 if (needsAnonymousDeclarationNumber(D)) {
2826 // This is an anonymous declaration that we may need to merge. Look it up
2827 // in its context by number.
2828 if (auto *Existing = getAnonymousDeclForMerging(
2829 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
2830 if (isSameEntity(Existing, D))
2831 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
2832 TypedefNameForLinkage);
2833 } else if (DC->isTranslationUnit() && Reader.SemaObj &&
2834 !Reader.getContext().getLangOpts().CPlusPlus) {
2835 IdentifierResolver &IdResolver = Reader.SemaObj->IdResolver;
2836
2837 // Temporarily consider the identifier to be up-to-date. We don't want to
2838 // cause additional lookups here.
2839 class UpToDateIdentifierRAII {
2840 IdentifierInfo *II;
2841 bool WasOutToDate;
2842
2843 public:
2844 explicit UpToDateIdentifierRAII(IdentifierInfo *II)
2845 : II(II), WasOutToDate(false)
2846 {
2847 if (II) {
2848 WasOutToDate = II->isOutOfDate();
2849 if (WasOutToDate)
2850 II->setOutOfDate(false);
2851 }
2852 }
2853
2854 ~UpToDateIdentifierRAII() {
2855 if (WasOutToDate)
2856 II->setOutOfDate(true);
2857 }
2858 } UpToDate(Name.getAsIdentifierInfo());
2859
2860 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
2861 IEnd = IdResolver.end();
2862 I != IEnd; ++I) {
2863 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
2864 if (isSameEntity(Existing, D))
2865 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
2866 TypedefNameForLinkage);
2867 }
2868 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
2869 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
2870 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
2871 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
2872 if (isSameEntity(Existing, D))
2873 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
2874 TypedefNameForLinkage);
2875 }
2876 } else {
2877 // Not in a mergeable context.
2878 return FindExistingResult(Reader);
2879 }
2880
2881 // If this declaration is from a merged context, make a note that we need to
2882 // check that the canonical definition of that context contains the decl.
2883 //
2884 // FIXME: We should do something similar if we merge two definitions of the
2885 // same template specialization into the same CXXRecordDecl.
2886 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
2887 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
2888 MergedDCIt->second == D->getDeclContext())
2889 Reader.PendingOdrMergeChecks.push_back(D);
2890
2891 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
2892 AnonymousDeclNumber, TypedefNameForLinkage);
2893 }
2894
2895 template<typename DeclT>
getMostRecentDeclImpl(Redeclarable<DeclT> * D)2896 Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
2897 return D->RedeclLink.getLatestNotUpdated();
2898 }
getMostRecentDeclImpl(...)2899 Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
2900 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration");
2901 }
2902
getMostRecentDecl(Decl * D)2903 Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
2904 assert(D);
2905
2906 switch (D->getKind()) {
2907 #define ABSTRACT_DECL(TYPE)
2908 #define DECL(TYPE, BASE) \
2909 case Decl::TYPE: \
2910 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
2911 #include "clang/AST/DeclNodes.inc"
2912 }
2913 llvm_unreachable("unknown decl kind");
2914 }
2915
getMostRecentExistingDecl(Decl * D)2916 Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
2917 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
2918 }
2919
2920 template<typename DeclT>
attachPreviousDeclImpl(ASTReader & Reader,Redeclarable<DeclT> * D,Decl * Previous,Decl * Canon)2921 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
2922 Redeclarable<DeclT> *D,
2923 Decl *Previous, Decl *Canon) {
2924 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
2925 D->First = cast<DeclT>(Previous)->First;
2926 }
2927
2928 namespace clang {
2929 template<>
attachPreviousDeclImpl(ASTReader & Reader,Redeclarable<FunctionDecl> * D,Decl * Previous,Decl * Canon)2930 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
2931 Redeclarable<FunctionDecl> *D,
2932 Decl *Previous, Decl *Canon) {
2933 FunctionDecl *FD = static_cast<FunctionDecl*>(D);
2934 FunctionDecl *PrevFD = cast<FunctionDecl>(Previous);
2935
2936 FD->RedeclLink.setPrevious(PrevFD);
2937 FD->First = PrevFD->First;
2938
2939 // If the previous declaration is an inline function declaration, then this
2940 // declaration is too.
2941 if (PrevFD->IsInline != FD->IsInline) {
2942 // FIXME: [dcl.fct.spec]p4:
2943 // If a function with external linkage is declared inline in one
2944 // translation unit, it shall be declared inline in all translation
2945 // units in which it appears.
2946 //
2947 // Be careful of this case:
2948 //
2949 // module A:
2950 // template<typename T> struct X { void f(); };
2951 // template<typename T> inline void X<T>::f() {}
2952 //
2953 // module B instantiates the declaration of X<int>::f
2954 // module C instantiates the definition of X<int>::f
2955 //
2956 // If module B and C are merged, we do not have a violation of this rule.
2957 FD->IsInline = true;
2958 }
2959
2960 // If we need to propagate an exception specification along the redecl
2961 // chain, make a note of that so that we can do so later.
2962 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
2963 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
2964 if (FPT && PrevFPT) {
2965 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
2966 bool WasUnresolved =
2967 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
2968 if (IsUnresolved != WasUnresolved)
2969 Reader.PendingExceptionSpecUpdates.insert(
2970 std::make_pair(Canon, IsUnresolved ? PrevFD : FD));
2971 }
2972 }
2973 } // end namespace clang
2974
attachPreviousDeclImpl(ASTReader & Reader,...)2975 void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
2976 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration");
2977 }
2978
2979 /// Inherit the default template argument from \p From to \p To. Returns
2980 /// \c false if there is no default template for \p From.
2981 template <typename ParmDecl>
inheritDefaultTemplateArgument(ASTContext & Context,ParmDecl * From,Decl * ToD)2982 static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
2983 Decl *ToD) {
2984 auto *To = cast<ParmDecl>(ToD);
2985 if (!From->hasDefaultArgument())
2986 return false;
2987 To->setInheritedDefaultArgument(Context, From);
2988 return true;
2989 }
2990
inheritDefaultTemplateArguments(ASTContext & Context,TemplateDecl * From,TemplateDecl * To)2991 static void inheritDefaultTemplateArguments(ASTContext &Context,
2992 TemplateDecl *From,
2993 TemplateDecl *To) {
2994 auto *FromTP = From->getTemplateParameters();
2995 auto *ToTP = To->getTemplateParameters();
2996 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?");
2997
2998 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
2999 NamedDecl *FromParam = FromTP->getParam(N - I - 1);
3000 NamedDecl *ToParam = ToTP->getParam(N - I - 1);
3001
3002 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam)) {
3003 if (!inheritDefaultTemplateArgument(Context, FTTP, ToParam))
3004 break;
3005 } else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam)) {
3006 if (!inheritDefaultTemplateArgument(Context, FNTTP, ToParam))
3007 break;
3008 } else {
3009 if (!inheritDefaultTemplateArgument(
3010 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam))
3011 break;
3012 }
3013 }
3014 }
3015
attachPreviousDecl(ASTReader & Reader,Decl * D,Decl * Previous,Decl * Canon)3016 void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3017 Decl *Previous, Decl *Canon) {
3018 assert(D && Previous);
3019
3020 switch (D->getKind()) {
3021 #define ABSTRACT_DECL(TYPE)
3022 #define DECL(TYPE, BASE) \
3023 case Decl::TYPE: \
3024 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3025 break;
3026 #include "clang/AST/DeclNodes.inc"
3027 }
3028
3029 // If the declaration was visible in one module, a redeclaration of it in
3030 // another module remains visible even if it wouldn't be visible by itself.
3031 //
3032 // FIXME: In this case, the declaration should only be visible if a module
3033 // that makes it visible has been imported.
3034 D->IdentifierNamespace |=
3035 Previous->IdentifierNamespace &
3036 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3037
3038 // If the previous declaration is marked as used, then this declaration should
3039 // be too.
3040 if (Previous->Used)
3041 D->Used = true;
3042
3043 // If the declaration declares a template, it may inherit default arguments
3044 // from the previous declaration.
3045 if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D))
3046 inheritDefaultTemplateArguments(Reader.getContext(),
3047 cast<TemplateDecl>(Previous), TD);
3048 }
3049
3050 template<typename DeclT>
attachLatestDeclImpl(Redeclarable<DeclT> * D,Decl * Latest)3051 void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3052 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3053 }
attachLatestDeclImpl(...)3054 void ASTDeclReader::attachLatestDeclImpl(...) {
3055 llvm_unreachable("attachLatestDecl on non-redeclarable declaration");
3056 }
3057
attachLatestDecl(Decl * D,Decl * Latest)3058 void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3059 assert(D && Latest);
3060
3061 switch (D->getKind()) {
3062 #define ABSTRACT_DECL(TYPE)
3063 #define DECL(TYPE, BASE) \
3064 case Decl::TYPE: \
3065 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3066 break;
3067 #include "clang/AST/DeclNodes.inc"
3068 }
3069 }
3070
3071 template<typename DeclT>
markIncompleteDeclChainImpl(Redeclarable<DeclT> * D)3072 void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3073 D->RedeclLink.markIncomplete();
3074 }
markIncompleteDeclChainImpl(...)3075 void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3076 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration");
3077 }
3078
markIncompleteDeclChain(Decl * D)3079 void ASTReader::markIncompleteDeclChain(Decl *D) {
3080 switch (D->getKind()) {
3081 #define ABSTRACT_DECL(TYPE)
3082 #define DECL(TYPE, BASE) \
3083 case Decl::TYPE: \
3084 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3085 break;
3086 #include "clang/AST/DeclNodes.inc"
3087 }
3088 }
3089
3090 /// \brief Read the declaration at the given offset from the AST file.
ReadDeclRecord(DeclID ID)3091 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3092 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3093 unsigned RawLocation = 0;
3094 RecordLocation Loc = DeclCursorForID(ID, RawLocation);
3095 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3096 // Keep track of where we are in the stream, then jump back there
3097 // after reading this declaration.
3098 SavedStreamPosition SavedPosition(DeclsCursor);
3099
3100 ReadingKindTracker ReadingKind(Read_Decl, *this);
3101
3102 // Note that we are loading a declaration record.
3103 Deserializing ADecl(this);
3104
3105 DeclsCursor.JumpToBit(Loc.Offset);
3106 RecordData Record;
3107 unsigned Code = DeclsCursor.ReadCode();
3108 unsigned Idx = 0;
3109 ASTDeclReader Reader(*this, *Loc.F, ID, RawLocation, Record,Idx);
3110
3111 Decl *D = nullptr;
3112 switch ((DeclCode)DeclsCursor.readRecord(Code, Record)) {
3113 case DECL_CONTEXT_LEXICAL:
3114 case DECL_CONTEXT_VISIBLE:
3115 llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
3116 case DECL_TYPEDEF:
3117 D = TypedefDecl::CreateDeserialized(Context, ID);
3118 break;
3119 case DECL_TYPEALIAS:
3120 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3121 break;
3122 case DECL_ENUM:
3123 D = EnumDecl::CreateDeserialized(Context, ID);
3124 break;
3125 case DECL_RECORD:
3126 D = RecordDecl::CreateDeserialized(Context, ID);
3127 break;
3128 case DECL_ENUM_CONSTANT:
3129 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3130 break;
3131 case DECL_FUNCTION:
3132 D = FunctionDecl::CreateDeserialized(Context, ID);
3133 break;
3134 case DECL_LINKAGE_SPEC:
3135 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3136 break;
3137 case DECL_LABEL:
3138 D = LabelDecl::CreateDeserialized(Context, ID);
3139 break;
3140 case DECL_NAMESPACE:
3141 D = NamespaceDecl::CreateDeserialized(Context, ID);
3142 break;
3143 case DECL_NAMESPACE_ALIAS:
3144 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3145 break;
3146 case DECL_USING:
3147 D = UsingDecl::CreateDeserialized(Context, ID);
3148 break;
3149 case DECL_USING_SHADOW:
3150 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3151 break;
3152 case DECL_USING_DIRECTIVE:
3153 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3154 break;
3155 case DECL_UNRESOLVED_USING_VALUE:
3156 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3157 break;
3158 case DECL_UNRESOLVED_USING_TYPENAME:
3159 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3160 break;
3161 case DECL_CXX_RECORD:
3162 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3163 break;
3164 case DECL_CXX_METHOD:
3165 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3166 break;
3167 case DECL_CXX_CONSTRUCTOR:
3168 D = CXXConstructorDecl::CreateDeserialized(Context, ID);
3169 break;
3170 case DECL_CXX_DESTRUCTOR:
3171 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3172 break;
3173 case DECL_CXX_CONVERSION:
3174 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3175 break;
3176 case DECL_ACCESS_SPEC:
3177 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3178 break;
3179 case DECL_FRIEND:
3180 D = FriendDecl::CreateDeserialized(Context, ID, Record[Idx++]);
3181 break;
3182 case DECL_FRIEND_TEMPLATE:
3183 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3184 break;
3185 case DECL_CLASS_TEMPLATE:
3186 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3187 break;
3188 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3189 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3190 break;
3191 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3192 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3193 break;
3194 case DECL_VAR_TEMPLATE:
3195 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3196 break;
3197 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3198 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3199 break;
3200 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3201 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3202 break;
3203 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3204 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3205 break;
3206 case DECL_FUNCTION_TEMPLATE:
3207 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3208 break;
3209 case DECL_TEMPLATE_TYPE_PARM:
3210 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3211 break;
3212 case DECL_NON_TYPE_TEMPLATE_PARM:
3213 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3214 break;
3215 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3216 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID, Record[Idx++]);
3217 break;
3218 case DECL_TEMPLATE_TEMPLATE_PARM:
3219 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3220 break;
3221 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3222 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3223 Record[Idx++]);
3224 break;
3225 case DECL_TYPE_ALIAS_TEMPLATE:
3226 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3227 break;
3228 case DECL_STATIC_ASSERT:
3229 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3230 break;
3231 case DECL_OBJC_METHOD:
3232 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3233 break;
3234 case DECL_OBJC_INTERFACE:
3235 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3236 break;
3237 case DECL_OBJC_IVAR:
3238 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3239 break;
3240 case DECL_OBJC_PROTOCOL:
3241 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3242 break;
3243 case DECL_OBJC_AT_DEFS_FIELD:
3244 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3245 break;
3246 case DECL_OBJC_CATEGORY:
3247 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3248 break;
3249 case DECL_OBJC_CATEGORY_IMPL:
3250 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3251 break;
3252 case DECL_OBJC_IMPLEMENTATION:
3253 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3254 break;
3255 case DECL_OBJC_COMPATIBLE_ALIAS:
3256 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3257 break;
3258 case DECL_OBJC_PROPERTY:
3259 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3260 break;
3261 case DECL_OBJC_PROPERTY_IMPL:
3262 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3263 break;
3264 case DECL_FIELD:
3265 D = FieldDecl::CreateDeserialized(Context, ID);
3266 break;
3267 case DECL_INDIRECTFIELD:
3268 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3269 break;
3270 case DECL_VAR:
3271 D = VarDecl::CreateDeserialized(Context, ID);
3272 break;
3273 case DECL_IMPLICIT_PARAM:
3274 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3275 break;
3276 case DECL_PARM_VAR:
3277 D = ParmVarDecl::CreateDeserialized(Context, ID);
3278 break;
3279 case DECL_FILE_SCOPE_ASM:
3280 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3281 break;
3282 case DECL_BLOCK:
3283 D = BlockDecl::CreateDeserialized(Context, ID);
3284 break;
3285 case DECL_MS_PROPERTY:
3286 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3287 break;
3288 case DECL_CAPTURED:
3289 D = CapturedDecl::CreateDeserialized(Context, ID, Record[Idx++]);
3290 break;
3291 case DECL_CXX_BASE_SPECIFIERS:
3292 Error("attempt to read a C++ base-specifier record as a declaration");
3293 return nullptr;
3294 case DECL_CXX_CTOR_INITIALIZERS:
3295 Error("attempt to read a C++ ctor initializer record as a declaration");
3296 return nullptr;
3297 case DECL_IMPORT:
3298 // Note: last entry of the ImportDecl record is the number of stored source
3299 // locations.
3300 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3301 break;
3302 case DECL_OMP_THREADPRIVATE:
3303 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record[Idx++]);
3304 break;
3305 case DECL_EMPTY:
3306 D = EmptyDecl::CreateDeserialized(Context, ID);
3307 break;
3308 case DECL_OBJC_TYPE_PARAM:
3309 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3310 break;
3311 }
3312
3313 assert(D && "Unknown declaration reading AST file");
3314 LoadedDecl(Index, D);
3315 // Set the DeclContext before doing any deserialization, to make sure internal
3316 // calls to Decl::getASTContext() by Decl's methods will find the
3317 // TranslationUnitDecl without crashing.
3318 D->setDeclContext(Context.getTranslationUnitDecl());
3319 Reader.Visit(D);
3320
3321 // If this declaration is also a declaration context, get the
3322 // offsets for its tables of lexical and visible declarations.
3323 if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
3324 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3325 if (Offsets.first &&
3326 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3327 return nullptr;
3328 if (Offsets.second &&
3329 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3330 return nullptr;
3331 }
3332 assert(Idx == Record.size());
3333
3334 // Load any relevant update records.
3335 PendingUpdateRecords.push_back(std::make_pair(ID, D));
3336
3337 // Load the categories after recursive loading is finished.
3338 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(D))
3339 if (Class->isThisDeclarationADefinition())
3340 loadObjCCategories(ID, Class);
3341
3342 // If we have deserialized a declaration that has a definition the
3343 // AST consumer might need to know about, queue it.
3344 // We don't pass it to the consumer immediately because we may be in recursive
3345 // loading, and some declarations may still be initializing.
3346 if (isConsumerInterestedIn(D, Reader.hasPendingBody()))
3347 InterestingDecls.push_back(D);
3348
3349 return D;
3350 }
3351
loadDeclUpdateRecords(serialization::DeclID ID,Decl * D)3352 void ASTReader::loadDeclUpdateRecords(serialization::DeclID ID, Decl *D) {
3353 // Load the pending visible updates for this decl context, if it has any.
3354 auto I = PendingVisibleUpdates.find(ID);
3355 if (I != PendingVisibleUpdates.end()) {
3356 auto VisibleUpdates = std::move(I->second);
3357 PendingVisibleUpdates.erase(I);
3358
3359 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
3360 for (const PendingVisibleUpdate &Update : VisibleUpdates)
3361 Lookups[DC].Table.add(
3362 Update.Mod, Update.Data,
3363 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
3364 DC->setHasExternalVisibleStorage(true);
3365 }
3366
3367 // The declaration may have been modified by files later in the chain.
3368 // If this is the case, read the record containing the updates from each file
3369 // and pass it to ASTDeclReader to make the modifications.
3370 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3371 if (UpdI != DeclUpdateOffsets.end()) {
3372 auto UpdateOffsets = std::move(UpdI->second);
3373 DeclUpdateOffsets.erase(UpdI);
3374
3375 bool WasInteresting = isConsumerInterestedIn(D, false);
3376 for (auto &FileAndOffset : UpdateOffsets) {
3377 ModuleFile *F = FileAndOffset.first;
3378 uint64_t Offset = FileAndOffset.second;
3379 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3380 SavedStreamPosition SavedPosition(Cursor);
3381 Cursor.JumpToBit(Offset);
3382 RecordData Record;
3383 unsigned Code = Cursor.ReadCode();
3384 unsigned RecCode = Cursor.readRecord(Code, Record);
3385 (void)RecCode;
3386 assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
3387
3388 unsigned Idx = 0;
3389 ASTDeclReader Reader(*this, *F, ID, 0, Record, Idx);
3390 Reader.UpdateDecl(D, *F, Record);
3391
3392 // We might have made this declaration interesting. If so, remember that
3393 // we need to hand it off to the consumer.
3394 if (!WasInteresting &&
3395 isConsumerInterestedIn(D, Reader.hasPendingBody())) {
3396 InterestingDecls.push_back(D);
3397 WasInteresting = true;
3398 }
3399 }
3400 }
3401 }
3402
loadPendingDeclChain(Decl * FirstLocal,uint64_t LocalOffset)3403 void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
3404 // Attach FirstLocal to the end of the decl chain.
3405 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
3406 if (FirstLocal != CanonDecl) {
3407 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
3408 ASTDeclReader::attachPreviousDecl(
3409 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
3410 CanonDecl);
3411 }
3412
3413 if (!LocalOffset) {
3414 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
3415 return;
3416 }
3417
3418 // Load the list of other redeclarations from this module file.
3419 ModuleFile *M = getOwningModuleFile(FirstLocal);
3420 assert(M && "imported decl from no module file");
3421
3422 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
3423 SavedStreamPosition SavedPosition(Cursor);
3424 Cursor.JumpToBit(LocalOffset);
3425
3426 RecordData Record;
3427 unsigned Code = Cursor.ReadCode();
3428 unsigned RecCode = Cursor.readRecord(Code, Record);
3429 (void)RecCode;
3430 assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!");
3431
3432 // FIXME: We have several different dispatches on decl kind here; maybe
3433 // we should instead generate one loop per kind and dispatch up-front?
3434 Decl *MostRecent = FirstLocal;
3435 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
3436 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
3437 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
3438 MostRecent = D;
3439 }
3440 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
3441 }
3442
3443 namespace {
3444 /// \brief Given an ObjC interface, goes through the modules and links to the
3445 /// interface all the categories for it.
3446 class ObjCCategoriesVisitor {
3447 ASTReader &Reader;
3448 serialization::GlobalDeclID InterfaceID;
3449 ObjCInterfaceDecl *Interface;
3450 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
3451 unsigned PreviousGeneration;
3452 ObjCCategoryDecl *Tail;
3453 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
3454
add(ObjCCategoryDecl * Cat)3455 void add(ObjCCategoryDecl *Cat) {
3456 // Only process each category once.
3457 if (!Deserialized.erase(Cat))
3458 return;
3459
3460 // Check for duplicate categories.
3461 if (Cat->getDeclName()) {
3462 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
3463 if (Existing &&
3464 Reader.getOwningModuleFile(Existing)
3465 != Reader.getOwningModuleFile(Cat)) {
3466 // FIXME: We should not warn for duplicates in diamond:
3467 //
3468 // MT //
3469 // / \ //
3470 // ML MR //
3471 // \ / //
3472 // MB //
3473 //
3474 // If there are duplicates in ML/MR, there will be warning when
3475 // creating MB *and* when importing MB. We should not warn when
3476 // importing.
3477 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
3478 << Interface->getDeclName() << Cat->getDeclName();
3479 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
3480 } else if (!Existing) {
3481 // Record this category.
3482 Existing = Cat;
3483 }
3484 }
3485
3486 // Add this category to the end of the chain.
3487 if (Tail)
3488 ASTDeclReader::setNextObjCCategory(Tail, Cat);
3489 else
3490 Interface->setCategoryListRaw(Cat);
3491 Tail = Cat;
3492 }
3493
3494 public:
ObjCCategoriesVisitor(ASTReader & Reader,serialization::GlobalDeclID InterfaceID,ObjCInterfaceDecl * Interface,llvm::SmallPtrSetImpl<ObjCCategoryDecl * > & Deserialized,unsigned PreviousGeneration)3495 ObjCCategoriesVisitor(ASTReader &Reader,
3496 serialization::GlobalDeclID InterfaceID,
3497 ObjCInterfaceDecl *Interface,
3498 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
3499 unsigned PreviousGeneration)
3500 : Reader(Reader), InterfaceID(InterfaceID), Interface(Interface),
3501 Deserialized(Deserialized), PreviousGeneration(PreviousGeneration),
3502 Tail(nullptr)
3503 {
3504 // Populate the name -> category map with the set of known categories.
3505 for (auto *Cat : Interface->known_categories()) {
3506 if (Cat->getDeclName())
3507 NameCategoryMap[Cat->getDeclName()] = Cat;
3508
3509 // Keep track of the tail of the category list.
3510 Tail = Cat;
3511 }
3512 }
3513
operator ()(ModuleFile & M)3514 bool operator()(ModuleFile &M) {
3515 // If we've loaded all of the category information we care about from
3516 // this module file, we're done.
3517 if (M.Generation <= PreviousGeneration)
3518 return true;
3519
3520 // Map global ID of the definition down to the local ID used in this
3521 // module file. If there is no such mapping, we'll find nothing here
3522 // (or in any module it imports).
3523 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
3524 if (!LocalID)
3525 return true;
3526
3527 // Perform a binary search to find the local redeclarations for this
3528 // declaration (if any).
3529 const ObjCCategoriesInfo Compare = { LocalID, 0 };
3530 const ObjCCategoriesInfo *Result
3531 = std::lower_bound(M.ObjCCategoriesMap,
3532 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
3533 Compare);
3534 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
3535 Result->DefinitionID != LocalID) {
3536 // We didn't find anything. If the class definition is in this module
3537 // file, then the module files it depends on cannot have any categories,
3538 // so suppress further lookup.
3539 return Reader.isDeclIDFromModule(InterfaceID, M);
3540 }
3541
3542 // We found something. Dig out all of the categories.
3543 unsigned Offset = Result->Offset;
3544 unsigned N = M.ObjCCategories[Offset];
3545 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
3546 for (unsigned I = 0; I != N; ++I)
3547 add(cast_or_null<ObjCCategoryDecl>(
3548 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
3549 return true;
3550 }
3551 };
3552 } // end anonymous namespace
3553
loadObjCCategories(serialization::GlobalDeclID ID,ObjCInterfaceDecl * D,unsigned PreviousGeneration)3554 void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
3555 ObjCInterfaceDecl *D,
3556 unsigned PreviousGeneration) {
3557 ObjCCategoriesVisitor Visitor(*this, ID, D, CategoriesDeserialized,
3558 PreviousGeneration);
3559 ModuleMgr.visit(Visitor);
3560 }
3561
3562 template<typename DeclT, typename Fn>
forAllLaterRedecls(DeclT * D,Fn F)3563 static void forAllLaterRedecls(DeclT *D, Fn F) {
3564 F(D);
3565
3566 // Check whether we've already merged D into its redeclaration chain.
3567 // MostRecent may or may not be nullptr if D has not been merged. If
3568 // not, walk the merged redecl chain and see if it's there.
3569 auto *MostRecent = D->getMostRecentDecl();
3570 bool Found = false;
3571 for (auto *Redecl = MostRecent; Redecl && !Found;
3572 Redecl = Redecl->getPreviousDecl())
3573 Found = (Redecl == D);
3574
3575 // If this declaration is merged, apply the functor to all later decls.
3576 if (Found) {
3577 for (auto *Redecl = MostRecent; Redecl != D;
3578 Redecl = Redecl->getPreviousDecl())
3579 F(Redecl);
3580 }
3581 }
3582
UpdateDecl(Decl * D,ModuleFile & ModuleFile,const RecordData & Record)3583 void ASTDeclReader::UpdateDecl(Decl *D, ModuleFile &ModuleFile,
3584 const RecordData &Record) {
3585 while (Idx < Record.size()) {
3586 switch ((DeclUpdateKind)Record[Idx++]) {
3587 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
3588 auto *RD = cast<CXXRecordDecl>(D);
3589 // FIXME: If we also have an update record for instantiating the
3590 // definition of D, we need that to happen before we get here.
3591 Decl *MD = Reader.ReadDecl(ModuleFile, Record, Idx);
3592 assert(MD && "couldn't read decl from update record");
3593 // FIXME: We should call addHiddenDecl instead, to add the member
3594 // to its DeclContext.
3595 RD->addedMember(MD);
3596 break;
3597 }
3598
3599 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
3600 // It will be added to the template's specializations set when loaded.
3601 (void)Reader.ReadDecl(ModuleFile, Record, Idx);
3602 break;
3603
3604 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
3605 NamespaceDecl *Anon
3606 = Reader.ReadDeclAs<NamespaceDecl>(ModuleFile, Record, Idx);
3607
3608 // Each module has its own anonymous namespace, which is disjoint from
3609 // any other module's anonymous namespaces, so don't attach the anonymous
3610 // namespace at all.
3611 if (ModuleFile.Kind != MK_ImplicitModule &&
3612 ModuleFile.Kind != MK_ExplicitModule) {
3613 if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(D))
3614 TU->setAnonymousNamespace(Anon);
3615 else
3616 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
3617 }
3618 break;
3619 }
3620
3621 case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER:
3622 cast<VarDecl>(D)->getMemberSpecializationInfo()->setPointOfInstantiation(
3623 Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3624 break;
3625
3626 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
3627 FunctionDecl *FD = cast<FunctionDecl>(D);
3628 if (Reader.PendingBodies[FD]) {
3629 // FIXME: Maybe check for ODR violations.
3630 // It's safe to stop now because this update record is always last.
3631 return;
3632 }
3633
3634 if (Record[Idx++]) {
3635 // Maintain AST consistency: any later redeclarations of this function
3636 // are inline if this one is. (We might have merged another declaration
3637 // into this one.)
3638 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
3639 FD->setImplicitlyInline();
3640 });
3641 }
3642 FD->setInnerLocStart(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3643 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
3644 CD->NumCtorInitializers = Record[Idx++];
3645 if (CD->NumCtorInitializers)
3646 CD->CtorInitializers =
3647 Reader.ReadCXXCtorInitializersRef(F, Record, Idx);
3648 }
3649 // Store the offset of the body so we can lazily load it later.
3650 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
3651 HasPendingBody = true;
3652 assert(Idx == Record.size() && "lazy body must be last");
3653 break;
3654 }
3655
3656 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
3657 auto *RD = cast<CXXRecordDecl>(D);
3658 auto *OldDD = RD->DefinitionData.getNotUpdated();
3659 bool HadRealDefinition =
3660 OldDD && (OldDD->Definition != RD ||
3661 !Reader.PendingFakeDefinitionData.count(OldDD));
3662 ReadCXXRecordDefinition(RD, /*Update*/true);
3663
3664 // Visible update is handled separately.
3665 uint64_t LexicalOffset = Record[Idx++];
3666 if (!HadRealDefinition && LexicalOffset) {
3667 Reader.ReadLexicalDeclContextStorage(ModuleFile, ModuleFile.DeclsCursor,
3668 LexicalOffset, RD);
3669 Reader.PendingFakeDefinitionData.erase(OldDD);
3670 }
3671
3672 auto TSK = (TemplateSpecializationKind)Record[Idx++];
3673 SourceLocation POI = Reader.ReadSourceLocation(ModuleFile, Record, Idx);
3674 if (MemberSpecializationInfo *MSInfo =
3675 RD->getMemberSpecializationInfo()) {
3676 MSInfo->setTemplateSpecializationKind(TSK);
3677 MSInfo->setPointOfInstantiation(POI);
3678 } else {
3679 ClassTemplateSpecializationDecl *Spec =
3680 cast<ClassTemplateSpecializationDecl>(RD);
3681 Spec->setTemplateSpecializationKind(TSK);
3682 Spec->setPointOfInstantiation(POI);
3683
3684 if (Record[Idx++]) {
3685 auto PartialSpec =
3686 ReadDeclAs<ClassTemplatePartialSpecializationDecl>(Record, Idx);
3687 SmallVector<TemplateArgument, 8> TemplArgs;
3688 Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
3689 auto *TemplArgList = TemplateArgumentList::CreateCopy(
3690 Reader.getContext(), TemplArgs.data(), TemplArgs.size());
3691
3692 // FIXME: If we already have a partial specialization set,
3693 // check that it matches.
3694 if (!Spec->getSpecializedTemplateOrPartial()
3695 .is<ClassTemplatePartialSpecializationDecl *>())
3696 Spec->setInstantiationOf(PartialSpec, TemplArgList);
3697 }
3698 }
3699
3700 RD->setTagKind((TagTypeKind)Record[Idx++]);
3701 RD->setLocation(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3702 RD->setLocStart(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3703 RD->setRBraceLoc(Reader.ReadSourceLocation(ModuleFile, Record, Idx));
3704
3705 if (Record[Idx++]) {
3706 AttrVec Attrs;
3707 Reader.ReadAttributes(F, Attrs, Record, Idx);
3708 D->setAttrsImpl(Attrs, Reader.getContext());
3709 }
3710 break;
3711 }
3712
3713 case UPD_CXX_RESOLVED_DTOR_DELETE: {
3714 // Set the 'operator delete' directly to avoid emitting another update
3715 // record.
3716 auto *Del = Reader.ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
3717 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
3718 // FIXME: Check consistency if we have an old and new operator delete.
3719 if (!First->OperatorDelete)
3720 First->OperatorDelete = Del;
3721 break;
3722 }
3723
3724 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
3725 FunctionProtoType::ExceptionSpecInfo ESI;
3726 SmallVector<QualType, 8> ExceptionStorage;
3727 Reader.readExceptionSpec(ModuleFile, ExceptionStorage, ESI, Record, Idx);
3728
3729 // Update this declaration's exception specification, if needed.
3730 auto *FD = cast<FunctionDecl>(D);
3731 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
3732 // FIXME: If the exception specification is already present, check that it
3733 // matches.
3734 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
3735 FD->setType(Reader.Context.getFunctionType(
3736 FPT->getReturnType(), FPT->getParamTypes(),
3737 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
3738
3739 // When we get to the end of deserializing, see if there are other decls
3740 // that we need to propagate this exception specification onto.
3741 Reader.PendingExceptionSpecUpdates.insert(
3742 std::make_pair(FD->getCanonicalDecl(), FD));
3743 }
3744 break;
3745 }
3746
3747 case UPD_CXX_DEDUCED_RETURN_TYPE: {
3748 // FIXME: Also do this when merging redecls.
3749 QualType DeducedResultType = Reader.readType(ModuleFile, Record, Idx);
3750 for (auto *Redecl : merged_redecls(D)) {
3751 // FIXME: If the return type is already deduced, check that it matches.
3752 FunctionDecl *FD = cast<FunctionDecl>(Redecl);
3753 Reader.Context.adjustDeducedFunctionResultType(FD, DeducedResultType);
3754 }
3755 break;
3756 }
3757
3758 case UPD_DECL_MARKED_USED: {
3759 // FIXME: This doesn't send the right notifications if there are
3760 // ASTMutationListeners other than an ASTWriter.
3761
3762 // Maintain AST consistency: any later redeclarations are used too.
3763 forAllLaterRedecls(D, [](Decl *D) { D->Used = true; });
3764 break;
3765 }
3766
3767 case UPD_MANGLING_NUMBER:
3768 Reader.Context.setManglingNumber(cast<NamedDecl>(D), Record[Idx++]);
3769 break;
3770
3771 case UPD_STATIC_LOCAL_NUMBER:
3772 Reader.Context.setStaticLocalNumber(cast<VarDecl>(D), Record[Idx++]);
3773 break;
3774
3775 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
3776 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
3777 Reader.Context, ReadSourceRange(Record, Idx)));
3778 break;
3779
3780 case UPD_DECL_EXPORTED: {
3781 unsigned SubmoduleID = readSubmoduleID(Record, Idx);
3782 auto *Exported = cast<NamedDecl>(D);
3783 if (auto *TD = dyn_cast<TagDecl>(Exported))
3784 Exported = TD->getDefinition();
3785 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
3786 if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
3787 // FIXME: This doesn't send the right notifications if there are
3788 // ASTMutationListeners other than an ASTWriter.
3789 Reader.getContext().mergeDefinitionIntoModule(
3790 cast<NamedDecl>(Exported), Owner,
3791 /*NotifyListeners*/ false);
3792 Reader.PendingMergedDefinitionsToDeduplicate.insert(
3793 cast<NamedDecl>(Exported));
3794 } else if (Owner && Owner->NameVisibility != Module::AllVisible) {
3795 // If Owner is made visible at some later point, make this declaration
3796 // visible too.
3797 Reader.HiddenNamesMap[Owner].push_back(Exported);
3798 } else {
3799 // The declaration is now visible.
3800 Exported->Hidden = false;
3801 }
3802 break;
3803 }
3804
3805 case UPD_ADDED_ATTR_TO_RECORD:
3806 AttrVec Attrs;
3807 Reader.ReadAttributes(F, Attrs, Record, Idx);
3808 assert(Attrs.size() == 1);
3809 D->addAttr(Attrs[0]);
3810 break;
3811 }
3812 }
3813 }
3814