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 "ASTCommon.h"
16 #include "clang/Serialization/ASTReader.h"
17 #include "clang/Sema/SemaDiagnostic.h"
18 #include "clang/AST/ASTConsumer.h"
19 #include "clang/AST/ASTContext.h"
20 #include "clang/AST/DeclVisitor.h"
21 #include "clang/AST/DeclGroup.h"
22 #include "clang/AST/DeclCXX.h"
23 #include "clang/AST/DeclTemplate.h"
24 #include "clang/AST/Expr.h"
25 using namespace clang;
26 using namespace clang::serialization;
27 
28 //===----------------------------------------------------------------------===//
29 // Declaration deserialization
30 //===----------------------------------------------------------------------===//
31 
32 namespace clang {
33   class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
34     ASTReader &Reader;
35     Module &F;
36     llvm::BitstreamCursor &Cursor;
37     const DeclID ThisDeclID;
38     typedef ASTReader::RecordData RecordData;
39     const RecordData &Record;
40     unsigned &Idx;
41     TypeID TypeIDForTypeDecl;
42 
43     DeclID DeclContextIDForTemplateParmDecl;
44     DeclID LexicalDeclContextIDForTemplateParmDecl;
45 
46     uint64_t GetCurrentCursorOffset();
47 
48     SourceLocation ReadSourceLocation(const RecordData &R, unsigned &I) {
49       return Reader.ReadSourceLocation(F, R, I);
50     }
51 
52     SourceRange ReadSourceRange(const RecordData &R, unsigned &I) {
53       return Reader.ReadSourceRange(F, R, I);
54     }
55 
56     TypeSourceInfo *GetTypeSourceInfo(const RecordData &R, unsigned &I) {
57       return Reader.GetTypeSourceInfo(F, R, I);
58     }
59 
60     serialization::DeclID ReadDeclID(const RecordData &R, unsigned &I) {
61       return Reader.ReadDeclID(F, R, I);
62     }
63 
64     Decl *ReadDecl(const RecordData &R, unsigned &I) {
65       return Reader.ReadDecl(F, R, I);
66     }
67 
68     template<typename T>
69     T *ReadDeclAs(const RecordData &R, unsigned &I) {
70       return Reader.ReadDeclAs<T>(F, R, I);
71     }
72 
73     void ReadQualifierInfo(QualifierInfo &Info,
74                            const RecordData &R, unsigned &I) {
75       Reader.ReadQualifierInfo(F, Info, R, I);
76     }
77 
78     void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name,
79                                 const RecordData &R, unsigned &I) {
80       Reader.ReadDeclarationNameLoc(F, DNLoc, Name, R, I);
81     }
82 
83     void ReadDeclarationNameInfo(DeclarationNameInfo &NameInfo,
84                                 const RecordData &R, unsigned &I) {
85       Reader.ReadDeclarationNameInfo(F, NameInfo, R, I);
86     }
87 
88     void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
89                                const RecordData &R, unsigned &I);
90 
91     void InitializeCXXDefinitionData(CXXRecordDecl *D,
92                                      CXXRecordDecl *DefinitionDecl,
93                                      const RecordData &Record, unsigned &Idx);
94   public:
95     ASTDeclReader(ASTReader &Reader, Module &F,
96                   llvm::BitstreamCursor &Cursor, DeclID thisDeclID,
97                   const RecordData &Record, unsigned &Idx)
98       : Reader(Reader), F(F), Cursor(Cursor), ThisDeclID(thisDeclID),
99         Record(Record), Idx(Idx), TypeIDForTypeDecl(0) { }
100 
101     static void attachPreviousDecl(Decl *D, Decl *previous);
102 
103     void Visit(Decl *D);
104 
105     void UpdateDecl(Decl *D, Module &Module,
106                     const RecordData &Record);
107 
108     static void setNextObjCCategory(ObjCCategoryDecl *Cat,
109                                     ObjCCategoryDecl *Next) {
110       Cat->NextClassCategory = Next;
111     }
112 
113     void VisitDecl(Decl *D);
114     void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
115     void VisitNamedDecl(NamedDecl *ND);
116     void VisitLabelDecl(LabelDecl *LD);
117     void VisitNamespaceDecl(NamespaceDecl *D);
118     void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
119     void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
120     void VisitTypeDecl(TypeDecl *TD);
121     void VisitTypedefDecl(TypedefDecl *TD);
122     void VisitTypeAliasDecl(TypeAliasDecl *TD);
123     void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
124     void VisitTagDecl(TagDecl *TD);
125     void VisitEnumDecl(EnumDecl *ED);
126     void VisitRecordDecl(RecordDecl *RD);
127     void VisitCXXRecordDecl(CXXRecordDecl *D);
128     void VisitClassTemplateSpecializationDecl(
129                                             ClassTemplateSpecializationDecl *D);
130     void VisitClassTemplatePartialSpecializationDecl(
131                                      ClassTemplatePartialSpecializationDecl *D);
132     void VisitClassScopeFunctionSpecializationDecl(
133                                        ClassScopeFunctionSpecializationDecl *D);
134     void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
135     void VisitValueDecl(ValueDecl *VD);
136     void VisitEnumConstantDecl(EnumConstantDecl *ECD);
137     void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
138     void VisitDeclaratorDecl(DeclaratorDecl *DD);
139     void VisitFunctionDecl(FunctionDecl *FD);
140     void VisitCXXMethodDecl(CXXMethodDecl *D);
141     void VisitCXXConstructorDecl(CXXConstructorDecl *D);
142     void VisitCXXDestructorDecl(CXXDestructorDecl *D);
143     void VisitCXXConversionDecl(CXXConversionDecl *D);
144     void VisitFieldDecl(FieldDecl *FD);
145     void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
146     void VisitVarDecl(VarDecl *VD);
147     void VisitImplicitParamDecl(ImplicitParamDecl *PD);
148     void VisitParmVarDecl(ParmVarDecl *PD);
149     void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
150     void VisitTemplateDecl(TemplateDecl *D);
151     void VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
152     void VisitClassTemplateDecl(ClassTemplateDecl *D);
153     void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
154     void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
155     void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
156     void VisitUsingDecl(UsingDecl *D);
157     void VisitUsingShadowDecl(UsingShadowDecl *D);
158     void VisitLinkageSpecDecl(LinkageSpecDecl *D);
159     void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
160     void VisitAccessSpecDecl(AccessSpecDecl *D);
161     void VisitFriendDecl(FriendDecl *D);
162     void VisitFriendTemplateDecl(FriendTemplateDecl *D);
163     void VisitStaticAssertDecl(StaticAssertDecl *D);
164     void VisitBlockDecl(BlockDecl *BD);
165 
166     std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
167     template <typename T> void VisitRedeclarable(Redeclarable<T> *D);
168 
169     // FIXME: Reorder according to DeclNodes.td?
170     void VisitObjCMethodDecl(ObjCMethodDecl *D);
171     void VisitObjCContainerDecl(ObjCContainerDecl *D);
172     void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
173     void VisitObjCIvarDecl(ObjCIvarDecl *D);
174     void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
175     void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
176     void VisitObjCClassDecl(ObjCClassDecl *D);
177     void VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D);
178     void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
179     void VisitObjCImplDecl(ObjCImplDecl *D);
180     void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
181     void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
182     void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
183     void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
184     void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
185   };
186 }
187 
188 uint64_t ASTDeclReader::GetCurrentCursorOffset() {
189   return F.DeclsCursor.GetCurrentBitNo() + F.GlobalBitOffset;
190 }
191 
192 void ASTDeclReader::Visit(Decl *D) {
193   DeclVisitor<ASTDeclReader, void>::Visit(D);
194 
195   if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) {
196     if (DD->DeclInfo) {
197       DeclaratorDecl::ExtInfo *Info =
198           DD->DeclInfo.get<DeclaratorDecl::ExtInfo *>();
199       Info->TInfo =
200           GetTypeSourceInfo(Record, Idx);
201     }
202     else {
203       DD->DeclInfo = GetTypeSourceInfo(Record, Idx);
204     }
205   }
206 
207   if (TypeDecl *TD = dyn_cast<TypeDecl>(D)) {
208     // if we have a fully initialized TypeDecl, we can safely read its type now.
209     TD->setTypeForDecl(Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull());
210   } else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
211     // FunctionDecl's body was written last after all other Stmts/Exprs.
212     if (Record[Idx++])
213       FD->setLazyBody(GetCurrentCursorOffset());
214   } else if (D->isTemplateParameter()) {
215     // If we have a fully initialized template parameter, we can now
216     // set its DeclContext.
217     D->setDeclContext(
218           cast_or_null<DeclContext>(
219                             Reader.GetDecl(DeclContextIDForTemplateParmDecl)));
220     D->setLexicalDeclContext(
221           cast_or_null<DeclContext>(
222                       Reader.GetDecl(LexicalDeclContextIDForTemplateParmDecl)));
223   }
224 }
225 
226 void ASTDeclReader::VisitDecl(Decl *D) {
227   if (D->isTemplateParameter()) {
228     // We don't want to deserialize the DeclContext of a template
229     // parameter immediately, because the template parameter might be
230     // used in the formulation of its DeclContext. Use the translation
231     // unit DeclContext as a placeholder.
232     DeclContextIDForTemplateParmDecl = ReadDeclID(Record, Idx);
233     LexicalDeclContextIDForTemplateParmDecl = ReadDeclID(Record, Idx);
234     D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
235   } else {
236     D->setDeclContext(ReadDeclAs<DeclContext>(Record, Idx));
237     D->setLexicalDeclContext(ReadDeclAs<DeclContext>(Record, Idx));
238   }
239   D->setLocation(ReadSourceLocation(Record, Idx));
240   D->setInvalidDecl(Record[Idx++]);
241   if (Record[Idx++]) { // hasAttrs
242     AttrVec Attrs;
243     Reader.ReadAttributes(F, Attrs, Record, Idx);
244     D->setAttrs(Attrs);
245   }
246   D->setImplicit(Record[Idx++]);
247   D->setUsed(Record[Idx++]);
248   D->setReferenced(Record[Idx++]);
249   D->setAccess((AccessSpecifier)Record[Idx++]);
250   D->FromASTFile = true;
251   D->ModulePrivate = Record[Idx++];
252 }
253 
254 void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
255   llvm_unreachable("Translation units are not serialized");
256 }
257 
258 void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
259   VisitDecl(ND);
260   ND->setDeclName(Reader.ReadDeclarationName(F, Record, Idx));
261 }
262 
263 void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
264   VisitNamedDecl(TD);
265   TD->setLocStart(ReadSourceLocation(Record, Idx));
266   // Delay type reading until after we have fully initialized the decl.
267   TypeIDForTypeDecl = Reader.getGlobalTypeID(F, Record[Idx++]);
268 }
269 
270 void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
271   VisitTypeDecl(TD);
272   TD->setTypeSourceInfo(GetTypeSourceInfo(Record, Idx));
273 }
274 
275 void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
276   VisitTypeDecl(TD);
277   TD->setTypeSourceInfo(GetTypeSourceInfo(Record, Idx));
278 }
279 
280 void ASTDeclReader::VisitTagDecl(TagDecl *TD) {
281   VisitTypeDecl(TD);
282   VisitRedeclarable(TD);
283   TD->IdentifierNamespace = Record[Idx++];
284   TD->setTagKind((TagDecl::TagKind)Record[Idx++]);
285   TD->setCompleteDefinition(Record[Idx++]);
286   TD->setEmbeddedInDeclarator(Record[Idx++]);
287   TD->setFreeStanding(Record[Idx++]);
288   TD->setRBraceLoc(ReadSourceLocation(Record, Idx));
289   if (Record[Idx++]) { // hasExtInfo
290     TagDecl::ExtInfo *Info = new (Reader.getContext()) TagDecl::ExtInfo();
291     ReadQualifierInfo(*Info, Record, Idx);
292     TD->TypedefNameDeclOrQualifier = Info;
293   } else
294     TD->setTypedefNameForAnonDecl(ReadDeclAs<TypedefNameDecl>(Record, Idx));
295 }
296 
297 void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
298   VisitTagDecl(ED);
299   if (TypeSourceInfo *TI = Reader.GetTypeSourceInfo(F, Record, Idx))
300     ED->setIntegerTypeSourceInfo(TI);
301   else
302     ED->setIntegerType(Reader.readType(F, Record, Idx));
303   ED->setPromotionType(Reader.readType(F, Record, Idx));
304   ED->setNumPositiveBits(Record[Idx++]);
305   ED->setNumNegativeBits(Record[Idx++]);
306   ED->IsScoped = Record[Idx++];
307   ED->IsScopedUsingClassTag = Record[Idx++];
308   ED->IsFixed = Record[Idx++];
309   ED->setInstantiationOfMemberEnum(ReadDeclAs<EnumDecl>(Record, Idx));
310 }
311 
312 void ASTDeclReader::VisitRecordDecl(RecordDecl *RD) {
313   VisitTagDecl(RD);
314   RD->setHasFlexibleArrayMember(Record[Idx++]);
315   RD->setAnonymousStructOrUnion(Record[Idx++]);
316   RD->setHasObjectMember(Record[Idx++]);
317 }
318 
319 void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
320   VisitNamedDecl(VD);
321   VD->setType(Reader.readType(F, Record, Idx));
322 }
323 
324 void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
325   VisitValueDecl(ECD);
326   if (Record[Idx++])
327     ECD->setInitExpr(Reader.ReadExpr(F));
328   ECD->setInitVal(Reader.ReadAPSInt(Record, Idx));
329 }
330 
331 void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
332   VisitValueDecl(DD);
333   DD->setInnerLocStart(ReadSourceLocation(Record, Idx));
334   if (Record[Idx++]) { // hasExtInfo
335     DeclaratorDecl::ExtInfo *Info
336         = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
337     ReadQualifierInfo(*Info, Record, Idx);
338     DD->DeclInfo = Info;
339   }
340 }
341 
342 void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
343   VisitDeclaratorDecl(FD);
344   VisitRedeclarable(FD);
345 
346   ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName(), Record, Idx);
347   FD->IdentifierNamespace = Record[Idx++];
348   switch ((FunctionDecl::TemplatedKind)Record[Idx++]) {
349   default: llvm_unreachable("Unhandled TemplatedKind!");
350   case FunctionDecl::TK_NonTemplate:
351     break;
352   case FunctionDecl::TK_FunctionTemplate:
353     FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>(Record,
354                                                                       Idx));
355     break;
356   case FunctionDecl::TK_MemberSpecialization: {
357     FunctionDecl *InstFD = ReadDeclAs<FunctionDecl>(Record, Idx);
358     TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
359     SourceLocation POI = ReadSourceLocation(Record, Idx);
360     FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
361     FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
362     break;
363   }
364   case FunctionDecl::TK_FunctionTemplateSpecialization: {
365     FunctionTemplateDecl *Template = ReadDeclAs<FunctionTemplateDecl>(Record,
366                                                                       Idx);
367     TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
368 
369     // Template arguments.
370     SmallVector<TemplateArgument, 8> TemplArgs;
371     Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
372 
373     // Template args as written.
374     SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
375     SourceLocation LAngleLoc, RAngleLoc;
376     bool HasTemplateArgumentsAsWritten = Record[Idx++];
377     if (HasTemplateArgumentsAsWritten) {
378       unsigned NumTemplateArgLocs = Record[Idx++];
379       TemplArgLocs.reserve(NumTemplateArgLocs);
380       for (unsigned i=0; i != NumTemplateArgLocs; ++i)
381         TemplArgLocs.push_back(
382             Reader.ReadTemplateArgumentLoc(F, Record, Idx));
383 
384       LAngleLoc = ReadSourceLocation(Record, Idx);
385       RAngleLoc = ReadSourceLocation(Record, Idx);
386     }
387 
388     SourceLocation POI = ReadSourceLocation(Record, Idx);
389 
390     ASTContext &C = Reader.getContext();
391     TemplateArgumentList *TemplArgList
392       = TemplateArgumentList::CreateCopy(C, TemplArgs.data(), TemplArgs.size());
393     TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
394     for (unsigned i=0, e = TemplArgLocs.size(); i != e; ++i)
395       TemplArgsInfo.addArgument(TemplArgLocs[i]);
396     FunctionTemplateSpecializationInfo *FTInfo
397         = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
398                                                      TemplArgList,
399                              HasTemplateArgumentsAsWritten ? &TemplArgsInfo : 0,
400                                                      POI);
401     FD->TemplateOrSpecialization = FTInfo;
402 
403     if (FD->isCanonicalDecl()) { // if canonical add to template's set.
404       // The template that contains the specializations set. It's not safe to
405       // use getCanonicalDecl on Template since it may still be initializing.
406       FunctionTemplateDecl *CanonTemplate
407         = ReadDeclAs<FunctionTemplateDecl>(Record, Idx);
408       // Get the InsertPos by FindNodeOrInsertPos() instead of calling
409       // InsertNode(FTInfo) directly to avoid the getASTContext() call in
410       // FunctionTemplateSpecializationInfo's Profile().
411       // We avoid getASTContext because a decl in the parent hierarchy may
412       // be initializing.
413       llvm::FoldingSetNodeID ID;
414       FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs.data(),
415                                                   TemplArgs.size(), C);
416       void *InsertPos = 0;
417       CanonTemplate->getSpecializations().FindNodeOrInsertPos(ID, InsertPos);
418       assert(InsertPos && "Another specialization already inserted!");
419       CanonTemplate->getSpecializations().InsertNode(FTInfo, InsertPos);
420     }
421     break;
422   }
423   case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
424     // Templates.
425     UnresolvedSet<8> TemplDecls;
426     unsigned NumTemplates = Record[Idx++];
427     while (NumTemplates--)
428       TemplDecls.addDecl(ReadDeclAs<NamedDecl>(Record, Idx));
429 
430     // Templates args.
431     TemplateArgumentListInfo TemplArgs;
432     unsigned NumArgs = Record[Idx++];
433     while (NumArgs--)
434       TemplArgs.addArgument(Reader.ReadTemplateArgumentLoc(F, Record, Idx));
435     TemplArgs.setLAngleLoc(ReadSourceLocation(Record, Idx));
436     TemplArgs.setRAngleLoc(ReadSourceLocation(Record, Idx));
437 
438     FD->setDependentTemplateSpecialization(Reader.getContext(),
439                                            TemplDecls, TemplArgs);
440     break;
441   }
442   }
443 
444   // FunctionDecl's body is handled last at ASTDeclReader::Visit,
445   // after everything else is read.
446 
447   FD->SClass = (StorageClass)Record[Idx++];
448   FD->SClassAsWritten = (StorageClass)Record[Idx++];
449   FD->IsInline = Record[Idx++];
450   FD->IsInlineSpecified = Record[Idx++];
451   FD->IsVirtualAsWritten = Record[Idx++];
452   FD->IsPure = Record[Idx++];
453   FD->HasInheritedPrototype = Record[Idx++];
454   FD->HasWrittenPrototype = Record[Idx++];
455   FD->IsDeleted = Record[Idx++];
456   FD->IsTrivial = Record[Idx++];
457   FD->IsDefaulted = Record[Idx++];
458   FD->IsExplicitlyDefaulted = Record[Idx++];
459   FD->HasImplicitReturnZero = Record[Idx++];
460   FD->IsConstexpr = Record[Idx++];
461   FD->EndRangeLoc = ReadSourceLocation(Record, Idx);
462 
463   // Read in the parameters.
464   unsigned NumParams = Record[Idx++];
465   SmallVector<ParmVarDecl *, 16> Params;
466   Params.reserve(NumParams);
467   for (unsigned I = 0; I != NumParams; ++I)
468     Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
469   FD->setParams(Reader.getContext(), Params);
470 }
471 
472 void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
473   VisitNamedDecl(MD);
474   if (Record[Idx++]) {
475     // In practice, this won't be executed (since method definitions
476     // don't occur in header files).
477     MD->setBody(Reader.ReadStmt(F));
478     MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>(Record, Idx));
479     MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>(Record, Idx));
480   }
481   MD->setInstanceMethod(Record[Idx++]);
482   MD->setVariadic(Record[Idx++]);
483   MD->setSynthesized(Record[Idx++]);
484   MD->setDefined(Record[Idx++]);
485   MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record[Idx++]);
486   MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record[Idx++]);
487   MD->SetRelatedResultType(Record[Idx++]);
488   MD->setResultType(Reader.readType(F, Record, Idx));
489   MD->setResultTypeSourceInfo(GetTypeSourceInfo(Record, Idx));
490   MD->setEndLoc(ReadSourceLocation(Record, Idx));
491   unsigned NumParams = Record[Idx++];
492   SmallVector<ParmVarDecl *, 16> Params;
493   Params.reserve(NumParams);
494   for (unsigned I = 0; I != NumParams; ++I)
495     Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
496 
497   MD->SelLocsKind = Record[Idx++];
498   unsigned NumStoredSelLocs = Record[Idx++];
499   SmallVector<SourceLocation, 16> SelLocs;
500   SelLocs.reserve(NumStoredSelLocs);
501   for (unsigned i = 0; i != NumStoredSelLocs; ++i)
502     SelLocs.push_back(ReadSourceLocation(Record, Idx));
503 
504   MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
505 }
506 
507 void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
508   VisitNamedDecl(CD);
509   CD->setAtStartLoc(ReadSourceLocation(Record, Idx));
510   CD->setAtEndRange(ReadSourceRange(Record, Idx));
511 }
512 
513 void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
514   VisitObjCContainerDecl(ID);
515   ID->setTypeForDecl(Reader.readType(F, Record, Idx).getTypePtrOrNull());
516   ID->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
517 
518   // Read the directly referenced protocols and their SourceLocations.
519   unsigned NumProtocols = Record[Idx++];
520   SmallVector<ObjCProtocolDecl *, 16> Protocols;
521   Protocols.reserve(NumProtocols);
522   for (unsigned I = 0; I != NumProtocols; ++I)
523     Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
524   SmallVector<SourceLocation, 16> ProtoLocs;
525   ProtoLocs.reserve(NumProtocols);
526   for (unsigned I = 0; I != NumProtocols; ++I)
527     ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
528   ID->setProtocolList(Protocols.data(), NumProtocols, ProtoLocs.data(),
529                       Reader.getContext());
530 
531   // Read the transitive closure of protocols referenced by this class.
532   NumProtocols = Record[Idx++];
533   Protocols.clear();
534   Protocols.reserve(NumProtocols);
535   for (unsigned I = 0; I != NumProtocols; ++I)
536     Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
537   ID->AllReferencedProtocols.set(Protocols.data(), NumProtocols,
538                                  Reader.getContext());
539 
540   // Read the ivars.
541   unsigned NumIvars = Record[Idx++];
542   SmallVector<ObjCIvarDecl *, 16> IVars;
543   IVars.reserve(NumIvars);
544   for (unsigned I = 0; I != NumIvars; ++I)
545     IVars.push_back(ReadDeclAs<ObjCIvarDecl>(Record, Idx));
546   ID->setCategoryList(ReadDeclAs<ObjCCategoryDecl>(Record, Idx));
547 
548   // We will rebuild this list lazily.
549   ID->setIvarList(0);
550   ID->setForwardDecl(Record[Idx++]);
551   ID->setImplicitInterfaceDecl(Record[Idx++]);
552   ID->setSuperClassLoc(ReadSourceLocation(Record, Idx));
553   ID->setLocEnd(ReadSourceLocation(Record, Idx));
554 }
555 
556 void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
557   VisitFieldDecl(IVD);
558   IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record[Idx++]);
559   // This field will be built lazily.
560   IVD->setNextIvar(0);
561   bool synth = Record[Idx++];
562   IVD->setSynthesize(synth);
563 }
564 
565 void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
566   VisitObjCContainerDecl(PD);
567   PD->setForwardDecl(Record[Idx++]);
568   PD->setLocEnd(ReadSourceLocation(Record, Idx));
569   unsigned NumProtoRefs = Record[Idx++];
570   SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
571   ProtoRefs.reserve(NumProtoRefs);
572   for (unsigned I = 0; I != NumProtoRefs; ++I)
573     ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
574   SmallVector<SourceLocation, 16> ProtoLocs;
575   ProtoLocs.reserve(NumProtoRefs);
576   for (unsigned I = 0; I != NumProtoRefs; ++I)
577     ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
578   PD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
579                       Reader.getContext());
580 }
581 
582 void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
583   VisitFieldDecl(FD);
584 }
585 
586 void ASTDeclReader::VisitObjCClassDecl(ObjCClassDecl *CD) {
587   VisitDecl(CD);
588   ObjCInterfaceDecl *ClassRef = ReadDeclAs<ObjCInterfaceDecl>(Record, Idx);
589   SourceLocation SLoc = ReadSourceLocation(Record, Idx);
590   CD->setClass(Reader.getContext(), ClassRef, SLoc);
591 }
592 
593 void ASTDeclReader::VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *FPD) {
594   VisitDecl(FPD);
595   unsigned NumProtoRefs = Record[Idx++];
596   SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
597   ProtoRefs.reserve(NumProtoRefs);
598   for (unsigned I = 0; I != NumProtoRefs; ++I)
599     ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
600   SmallVector<SourceLocation, 16> ProtoLocs;
601   ProtoLocs.reserve(NumProtoRefs);
602   for (unsigned I = 0; I != NumProtoRefs; ++I)
603     ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
604   FPD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
605                        Reader.getContext());
606 }
607 
608 void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
609   VisitObjCContainerDecl(CD);
610   CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>(Record, Idx);
611   unsigned NumProtoRefs = Record[Idx++];
612   SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
613   ProtoRefs.reserve(NumProtoRefs);
614   for (unsigned I = 0; I != NumProtoRefs; ++I)
615     ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>(Record, Idx));
616   SmallVector<SourceLocation, 16> ProtoLocs;
617   ProtoLocs.reserve(NumProtoRefs);
618   for (unsigned I = 0; I != NumProtoRefs; ++I)
619     ProtoLocs.push_back(ReadSourceLocation(Record, Idx));
620   CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
621                       Reader.getContext());
622   CD->NextClassCategory = ReadDeclAs<ObjCCategoryDecl>(Record, Idx);
623   CD->setHasSynthBitfield(Record[Idx++]);
624   CD->setCategoryNameLoc(ReadSourceLocation(Record, Idx));
625 }
626 
627 void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
628   VisitNamedDecl(CAD);
629   CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
630 }
631 
632 void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
633   VisitNamedDecl(D);
634   D->setAtLoc(ReadSourceLocation(Record, Idx));
635   D->setType(GetTypeSourceInfo(Record, Idx));
636   // FIXME: stable encoding
637   D->setPropertyAttributes(
638                       (ObjCPropertyDecl::PropertyAttributeKind)Record[Idx++]);
639   D->setPropertyAttributesAsWritten(
640                       (ObjCPropertyDecl::PropertyAttributeKind)Record[Idx++]);
641   // FIXME: stable encoding
642   D->setPropertyImplementation(
643                             (ObjCPropertyDecl::PropertyControl)Record[Idx++]);
644   D->setGetterName(Reader.ReadDeclarationName(F,Record, Idx).getObjCSelector());
645   D->setSetterName(Reader.ReadDeclarationName(F,Record, Idx).getObjCSelector());
646   D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>(Record, Idx));
647   D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>(Record, Idx));
648   D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>(Record, Idx));
649 }
650 
651 void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
652   VisitObjCContainerDecl(D);
653   D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
654 }
655 
656 void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
657   VisitObjCImplDecl(D);
658   D->setIdentifier(Reader.GetIdentifierInfo(F, Record, Idx));
659 }
660 
661 void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
662   VisitObjCImplDecl(D);
663   D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>(Record, Idx));
664   llvm::tie(D->IvarInitializers, D->NumIvarInitializers)
665       = Reader.ReadCXXCtorInitializers(F, Record, Idx);
666   D->setHasSynthBitfield(Record[Idx++]);
667 }
668 
669 
670 void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
671   VisitDecl(D);
672   D->setAtLoc(ReadSourceLocation(Record, Idx));
673   D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>(Record, Idx));
674   D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>(Record, Idx);
675   D->IvarLoc = ReadSourceLocation(Record, Idx);
676   D->setGetterCXXConstructor(Reader.ReadExpr(F));
677   D->setSetterCXXAssignment(Reader.ReadExpr(F));
678 }
679 
680 void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
681   VisitDeclaratorDecl(FD);
682   FD->setMutable(Record[Idx++]);
683   int BitWidthOrInitializer = Record[Idx++];
684   if (BitWidthOrInitializer == 1)
685     FD->setBitWidth(Reader.ReadExpr(F));
686   else if (BitWidthOrInitializer == 2)
687     FD->setInClassInitializer(Reader.ReadExpr(F));
688   if (!FD->getDeclName()) {
689     if (FieldDecl *Tmpl = ReadDeclAs<FieldDecl>(Record, Idx))
690       Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
691   }
692 }
693 
694 void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
695   VisitValueDecl(FD);
696 
697   FD->ChainingSize = Record[Idx++];
698   assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2");
699   FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
700 
701   for (unsigned I = 0; I != FD->ChainingSize; ++I)
702     FD->Chaining[I] = ReadDeclAs<NamedDecl>(Record, Idx);
703 }
704 
705 void ASTDeclReader::VisitVarDecl(VarDecl *VD) {
706   VisitDeclaratorDecl(VD);
707   VisitRedeclarable(VD);
708   VD->VarDeclBits.SClass = (StorageClass)Record[Idx++];
709   VD->VarDeclBits.SClassAsWritten = (StorageClass)Record[Idx++];
710   VD->VarDeclBits.ThreadSpecified = Record[Idx++];
711   VD->VarDeclBits.HasCXXDirectInit = Record[Idx++];
712   VD->VarDeclBits.ExceptionVar = Record[Idx++];
713   VD->VarDeclBits.NRVOVariable = Record[Idx++];
714   VD->VarDeclBits.CXXForRangeDecl = Record[Idx++];
715   VD->VarDeclBits.ARCPseudoStrong = Record[Idx++];
716   if (Record[Idx++])
717     VD->setInit(Reader.ReadExpr(F));
718 
719   if (Record[Idx++]) { // HasMemberSpecializationInfo.
720     VarDecl *Tmpl = ReadDeclAs<VarDecl>(Record, Idx);
721     TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
722     SourceLocation POI = ReadSourceLocation(Record, Idx);
723     Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
724   }
725 }
726 
727 void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
728   VisitVarDecl(PD);
729 }
730 
731 void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
732   VisitVarDecl(PD);
733   unsigned isObjCMethodParam = Record[Idx++];
734   unsigned scopeDepth = Record[Idx++];
735   unsigned scopeIndex = Record[Idx++];
736   unsigned declQualifier = Record[Idx++];
737   if (isObjCMethodParam) {
738     assert(scopeDepth == 0);
739     PD->setObjCMethodScopeInfo(scopeIndex);
740     PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
741   } else {
742     PD->setScopeInfo(scopeDepth, scopeIndex);
743   }
744   PD->ParmVarDeclBits.IsKNRPromoted = Record[Idx++];
745   PD->ParmVarDeclBits.HasInheritedDefaultArg = Record[Idx++];
746   if (Record[Idx++]) // hasUninstantiatedDefaultArg.
747     PD->setUninstantiatedDefaultArg(Reader.ReadExpr(F));
748 }
749 
750 void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
751   VisitDecl(AD);
752   AD->setAsmString(cast<StringLiteral>(Reader.ReadExpr(F)));
753   AD->setRParenLoc(ReadSourceLocation(Record, Idx));
754 }
755 
756 void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
757   VisitDecl(BD);
758   BD->setBody(cast_or_null<CompoundStmt>(Reader.ReadStmt(F)));
759   BD->setSignatureAsWritten(GetTypeSourceInfo(Record, Idx));
760   unsigned NumParams = Record[Idx++];
761   SmallVector<ParmVarDecl *, 16> Params;
762   Params.reserve(NumParams);
763   for (unsigned I = 0; I != NumParams; ++I)
764     Params.push_back(ReadDeclAs<ParmVarDecl>(Record, Idx));
765   BD->setParams(Params);
766 
767   bool capturesCXXThis = Record[Idx++];
768   unsigned numCaptures = Record[Idx++];
769   SmallVector<BlockDecl::Capture, 16> captures;
770   captures.reserve(numCaptures);
771   for (unsigned i = 0; i != numCaptures; ++i) {
772     VarDecl *decl = ReadDeclAs<VarDecl>(Record, Idx);
773     unsigned flags = Record[Idx++];
774     bool byRef = (flags & 1);
775     bool nested = (flags & 2);
776     Expr *copyExpr = ((flags & 4) ? Reader.ReadExpr(F) : 0);
777 
778     captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
779   }
780   BD->setCaptures(Reader.getContext(), captures.begin(),
781                   captures.end(), capturesCXXThis);
782 }
783 
784 void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
785   VisitDecl(D);
786   D->setLanguage((LinkageSpecDecl::LanguageIDs)Record[Idx++]);
787   D->setExternLoc(ReadSourceLocation(Record, Idx));
788   D->setRBraceLoc(ReadSourceLocation(Record, Idx));
789 }
790 
791 void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
792   VisitNamedDecl(D);
793   D->setLocStart(ReadSourceLocation(Record, Idx));
794 }
795 
796 
797 void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
798   VisitNamedDecl(D);
799   D->IsInline = Record[Idx++];
800   D->LocStart = ReadSourceLocation(Record, Idx);
801   D->RBraceLoc = ReadSourceLocation(Record, Idx);
802   D->NextNamespace = Record[Idx++];
803 
804   bool IsOriginal = Record[Idx++];
805   // FIXME: Modules will likely have trouble with pointing directly at
806   // the original namespace.
807   D->OrigOrAnonNamespace.setInt(IsOriginal);
808   D->OrigOrAnonNamespace.setPointer(ReadDeclAs<NamespaceDecl>(Record, Idx));
809 }
810 
811 void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
812   VisitNamedDecl(D);
813   D->NamespaceLoc = ReadSourceLocation(Record, Idx);
814   D->IdentLoc = ReadSourceLocation(Record, Idx);
815   D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
816   D->Namespace = ReadDeclAs<NamedDecl>(Record, Idx);
817 }
818 
819 void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
820   VisitNamedDecl(D);
821   D->setUsingLocation(ReadSourceLocation(Record, Idx));
822   D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
823   ReadDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record, Idx);
824   D->FirstUsingShadow = ReadDeclAs<UsingShadowDecl>(Record, Idx);
825   D->setTypeName(Record[Idx++]);
826   if (NamedDecl *Pattern = ReadDeclAs<NamedDecl>(Record, Idx))
827     Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
828 }
829 
830 void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
831   VisitNamedDecl(D);
832   D->setTargetDecl(ReadDeclAs<NamedDecl>(Record, Idx));
833   D->UsingOrNextShadow = ReadDeclAs<NamedDecl>(Record, Idx);
834   UsingShadowDecl *Pattern = ReadDeclAs<UsingShadowDecl>(Record, Idx);
835   if (Pattern)
836     Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
837 }
838 
839 void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
840   VisitNamedDecl(D);
841   D->UsingLoc = ReadSourceLocation(Record, Idx);
842   D->NamespaceLoc = ReadSourceLocation(Record, Idx);
843   D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
844   D->NominatedNamespace = ReadDeclAs<NamedDecl>(Record, Idx);
845   D->CommonAncestor = ReadDeclAs<DeclContext>(Record, Idx);
846 }
847 
848 void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
849   VisitValueDecl(D);
850   D->setUsingLoc(ReadSourceLocation(Record, Idx));
851   D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
852   ReadDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record, Idx);
853 }
854 
855 void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
856                                                UnresolvedUsingTypenameDecl *D) {
857   VisitTypeDecl(D);
858   D->TypenameLocation = ReadSourceLocation(Record, Idx);
859   D->QualifierLoc = Reader.ReadNestedNameSpecifierLoc(F, Record, Idx);
860 }
861 
862 void ASTDeclReader::ReadCXXDefinitionData(
863                                    struct CXXRecordDecl::DefinitionData &Data,
864                                    const RecordData &Record, unsigned &Idx) {
865   Data.UserDeclaredConstructor = Record[Idx++];
866   Data.UserDeclaredCopyConstructor = Record[Idx++];
867   Data.UserDeclaredMoveConstructor = Record[Idx++];
868   Data.UserDeclaredCopyAssignment = Record[Idx++];
869   Data.UserDeclaredMoveAssignment = Record[Idx++];
870   Data.UserDeclaredDestructor = Record[Idx++];
871   Data.Aggregate = Record[Idx++];
872   Data.PlainOldData = Record[Idx++];
873   Data.Empty = Record[Idx++];
874   Data.Polymorphic = Record[Idx++];
875   Data.Abstract = Record[Idx++];
876   Data.IsStandardLayout = Record[Idx++];
877   Data.HasNoNonEmptyBases = Record[Idx++];
878   Data.HasPrivateFields = Record[Idx++];
879   Data.HasProtectedFields = Record[Idx++];
880   Data.HasPublicFields = Record[Idx++];
881   Data.HasMutableFields = Record[Idx++];
882   Data.HasTrivialDefaultConstructor = Record[Idx++];
883   Data.HasConstexprNonCopyMoveConstructor = Record[Idx++];
884   Data.HasTrivialCopyConstructor = Record[Idx++];
885   Data.HasTrivialMoveConstructor = Record[Idx++];
886   Data.HasTrivialCopyAssignment = Record[Idx++];
887   Data.HasTrivialMoveAssignment = Record[Idx++];
888   Data.HasTrivialDestructor = Record[Idx++];
889   Data.HasNonLiteralTypeFieldsOrBases = Record[Idx++];
890   Data.ComputedVisibleConversions = Record[Idx++];
891   Data.UserProvidedDefaultConstructor = Record[Idx++];
892   Data.DeclaredDefaultConstructor = Record[Idx++];
893   Data.DeclaredCopyConstructor = Record[Idx++];
894   Data.DeclaredMoveConstructor = Record[Idx++];
895   Data.DeclaredCopyAssignment = Record[Idx++];
896   Data.DeclaredMoveAssignment = Record[Idx++];
897   Data.DeclaredDestructor = Record[Idx++];
898   Data.FailedImplicitMoveConstructor = Record[Idx++];
899   Data.FailedImplicitMoveAssignment = Record[Idx++];
900 
901   Data.NumBases = Record[Idx++];
902   if (Data.NumBases)
903     Data.Bases = Reader.readCXXBaseSpecifiers(F, Record, Idx);
904   Data.NumVBases = Record[Idx++];
905   if (Data.NumVBases)
906     Data.VBases = Reader.readCXXBaseSpecifiers(F, Record, Idx);
907 
908   Reader.ReadUnresolvedSet(F, Data.Conversions, Record, Idx);
909   Reader.ReadUnresolvedSet(F, Data.VisibleConversions, Record, Idx);
910   assert(Data.Definition && "Data.Definition should be already set!");
911   Data.FirstFriend = ReadDeclAs<FriendDecl>(Record, Idx);
912 }
913 
914 void ASTDeclReader::InitializeCXXDefinitionData(CXXRecordDecl *D,
915                                                 CXXRecordDecl *DefinitionDecl,
916                                                 const RecordData &Record,
917                                                 unsigned &Idx) {
918   ASTContext &C = Reader.getContext();
919 
920   if (D == DefinitionDecl) {
921     D->DefinitionData = new (C) struct CXXRecordDecl::DefinitionData(D);
922     ReadCXXDefinitionData(*D->DefinitionData, Record, Idx);
923     // We read the definition info. Check if there are pending forward
924     // references that need to point to this DefinitionData pointer.
925     ASTReader::PendingForwardRefsMap::iterator
926         FindI = Reader.PendingForwardRefs.find(D);
927     if (FindI != Reader.PendingForwardRefs.end()) {
928       ASTReader::ForwardRefs &Refs = FindI->second;
929       for (ASTReader::ForwardRefs::iterator
930              I = Refs.begin(), E = Refs.end(); I != E; ++I)
931         (*I)->DefinitionData = D->DefinitionData;
932 #ifndef NDEBUG
933       // We later check whether PendingForwardRefs is empty to make sure all
934       // pending references were linked.
935       Reader.PendingForwardRefs.erase(D);
936 #endif
937     }
938   } else if (DefinitionDecl) {
939     if (DefinitionDecl->DefinitionData) {
940       D->DefinitionData = DefinitionDecl->DefinitionData;
941     } else {
942       // The definition is still initializing.
943       Reader.PendingForwardRefs[DefinitionDecl].push_back(D);
944     }
945   }
946 }
947 
948 void ASTDeclReader::VisitCXXRecordDecl(CXXRecordDecl *D) {
949   VisitRecordDecl(D);
950 
951   CXXRecordDecl *DefinitionDecl = ReadDeclAs<CXXRecordDecl>(Record, Idx);
952   InitializeCXXDefinitionData(D, DefinitionDecl, Record, Idx);
953 
954   ASTContext &C = Reader.getContext();
955 
956   enum CXXRecKind {
957     CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
958   };
959   switch ((CXXRecKind)Record[Idx++]) {
960   default:
961     llvm_unreachable("Out of sync with ASTDeclWriter::VisitCXXRecordDecl?");
962   case CXXRecNotTemplate:
963     break;
964   case CXXRecTemplate:
965     D->TemplateOrInstantiation = ReadDeclAs<ClassTemplateDecl>(Record, Idx);
966     break;
967   case CXXRecMemberSpecialization: {
968     CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>(Record, Idx);
969     TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
970     SourceLocation POI = ReadSourceLocation(Record, Idx);
971     MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
972     MSI->setPointOfInstantiation(POI);
973     D->TemplateOrInstantiation = MSI;
974     break;
975   }
976   }
977 
978   // Load the key function to avoid deserializing every method so we can
979   // compute it.
980   if (D->IsCompleteDefinition) {
981     if (CXXMethodDecl *Key = ReadDeclAs<CXXMethodDecl>(Record, Idx))
982       C.KeyFunctions[D] = Key;
983   }
984 }
985 
986 void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
987   VisitFunctionDecl(D);
988   unsigned NumOverridenMethods = Record[Idx++];
989   while (NumOverridenMethods--) {
990     // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
991     // MD may be initializing.
992     if (CXXMethodDecl *MD = ReadDeclAs<CXXMethodDecl>(Record, Idx))
993       Reader.getContext().addOverriddenMethod(D, MD);
994   }
995 }
996 
997 void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
998   VisitCXXMethodDecl(D);
999 
1000   D->IsExplicitSpecified = Record[Idx++];
1001   D->ImplicitlyDefined = Record[Idx++];
1002   llvm::tie(D->CtorInitializers, D->NumCtorInitializers)
1003       = Reader.ReadCXXCtorInitializers(F, Record, Idx);
1004 }
1005 
1006 void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1007   VisitCXXMethodDecl(D);
1008 
1009   D->ImplicitlyDefined = Record[Idx++];
1010   D->OperatorDelete = ReadDeclAs<FunctionDecl>(Record, Idx);
1011 }
1012 
1013 void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1014   VisitCXXMethodDecl(D);
1015   D->IsExplicitSpecified = Record[Idx++];
1016 }
1017 
1018 void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1019   VisitDecl(D);
1020   D->setColonLoc(ReadSourceLocation(Record, Idx));
1021 }
1022 
1023 void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1024   VisitDecl(D);
1025   if (Record[Idx++])
1026     D->Friend = GetTypeSourceInfo(Record, Idx);
1027   else
1028     D->Friend = ReadDeclAs<NamedDecl>(Record, Idx);
1029   D->NextFriend = Record[Idx++];
1030   D->UnsupportedFriend = (Record[Idx++] != 0);
1031   D->FriendLoc = ReadSourceLocation(Record, Idx);
1032 }
1033 
1034 void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1035   VisitDecl(D);
1036   unsigned NumParams = Record[Idx++];
1037   D->NumParams = NumParams;
1038   D->Params = new TemplateParameterList*[NumParams];
1039   for (unsigned i = 0; i != NumParams; ++i)
1040     D->Params[i] = Reader.ReadTemplateParameterList(F, Record, Idx);
1041   if (Record[Idx++]) // HasFriendDecl
1042     D->Friend = ReadDeclAs<NamedDecl>(Record, Idx);
1043   else
1044     D->Friend = GetTypeSourceInfo(Record, Idx);
1045   D->FriendLoc = ReadSourceLocation(Record, Idx);
1046 }
1047 
1048 void ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
1049   VisitNamedDecl(D);
1050 
1051   NamedDecl *TemplatedDecl = ReadDeclAs<NamedDecl>(Record, Idx);
1052   TemplateParameterList* TemplateParams
1053       = Reader.ReadTemplateParameterList(F, Record, Idx);
1054   D->init(TemplatedDecl, TemplateParams);
1055 }
1056 
1057 void ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1058   // Initialize CommonOrPrev before VisitTemplateDecl so that getCommonPtr()
1059   // can be used while this is still initializing.
1060 
1061   assert(D->CommonOrPrev.isNull() && "getCommonPtr was called earlier on this");
1062   DeclID PreviousDeclID = ReadDeclID(Record, Idx);
1063   DeclID FirstDeclID =  PreviousDeclID ? ReadDeclID(Record, Idx) : 0;
1064   // We delay loading of the redeclaration chain to avoid deeply nested calls.
1065   // We temporarily set the first (canonical) declaration as the previous one
1066   // which is the one that matters and mark the real previous DeclID to be
1067   // loaded & attached later on.
1068   RedeclarableTemplateDecl *FirstDecl =
1069       cast_or_null<RedeclarableTemplateDecl>(Reader.GetDecl(FirstDeclID));
1070   assert((FirstDecl == 0 || FirstDecl->getKind() == D->getKind()) &&
1071          "FirstDecl kind mismatch");
1072   if (FirstDecl) {
1073     D->CommonOrPrev = FirstDecl;
1074     // Mark the real previous DeclID to be loaded & attached later on.
1075     if (PreviousDeclID != FirstDeclID)
1076       Reader.PendingPreviousDecls.push_back(std::make_pair(D, PreviousDeclID));
1077   } else {
1078     D->CommonOrPrev = D->newCommon(Reader.getContext());
1079     if (RedeclarableTemplateDecl *RTD
1080           = ReadDeclAs<RedeclarableTemplateDecl>(Record, Idx)) {
1081       assert(RTD->getKind() == D->getKind() &&
1082              "InstantiatedFromMemberTemplate kind mismatch");
1083       D->setInstantiatedFromMemberTemplateImpl(RTD);
1084       if (Record[Idx++])
1085         D->setMemberSpecialization();
1086     }
1087 
1088     RedeclarableTemplateDecl *LatestDecl
1089       = ReadDeclAs<RedeclarableTemplateDecl>(Record, Idx);
1090 
1091     // This decl is a first one and the latest declaration that it points to is
1092     // in the same AST file. However, if this actually needs to point to a
1093     // redeclaration in another AST file, we need to update it by checking
1094     // the FirstLatestDeclIDs map which tracks this kind of decls.
1095     assert(Reader.GetDecl(ThisDeclID) == D && "Invalid ThisDeclID ?");
1096     ASTReader::FirstLatestDeclIDMap::iterator I
1097         = Reader.FirstLatestDeclIDs.find(ThisDeclID);
1098     if (I != Reader.FirstLatestDeclIDs.end()) {
1099       if (Decl *NewLatest = Reader.GetDecl(I->second))
1100         LatestDecl = cast<RedeclarableTemplateDecl>(NewLatest);
1101     }
1102 
1103     assert(LatestDecl->getKind() == D->getKind() && "Latest kind mismatch");
1104     D->getCommonPtr()->Latest = LatestDecl;
1105   }
1106 
1107   VisitTemplateDecl(D);
1108   D->IdentifierNamespace = Record[Idx++];
1109 }
1110 
1111 void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1112   VisitRedeclarableTemplateDecl(D);
1113 
1114   if (D->getPreviousDeclaration() == 0) {
1115     // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
1116     // the specializations.
1117     SmallVector<serialization::DeclID, 2> SpecIDs;
1118     SpecIDs.push_back(0);
1119 
1120     // Specializations.
1121     unsigned Size = Record[Idx++];
1122     SpecIDs[0] += Size;
1123     for (unsigned I = 0; I != Size; ++I)
1124       SpecIDs.push_back(ReadDeclID(Record, Idx));
1125 
1126     // Partial specializations.
1127     Size = Record[Idx++];
1128     SpecIDs[0] += Size;
1129     for (unsigned I = 0; I != Size; ++I)
1130       SpecIDs.push_back(ReadDeclID(Record, Idx));
1131 
1132     if (SpecIDs[0]) {
1133       typedef serialization::DeclID DeclID;
1134 
1135       ClassTemplateDecl::Common *CommonPtr = D->getCommonPtr();
1136       CommonPtr->LazySpecializations
1137         = new (Reader.getContext()) DeclID [SpecIDs.size()];
1138       memcpy(CommonPtr->LazySpecializations, SpecIDs.data(),
1139              SpecIDs.size() * sizeof(DeclID));
1140     }
1141 
1142     // InjectedClassNameType is computed.
1143   }
1144 }
1145 
1146 void ASTDeclReader::VisitClassTemplateSpecializationDecl(
1147                                            ClassTemplateSpecializationDecl *D) {
1148   VisitCXXRecordDecl(D);
1149 
1150   ASTContext &C = Reader.getContext();
1151   if (Decl *InstD = ReadDecl(Record, Idx)) {
1152     if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
1153       D->SpecializedTemplate = CTD;
1154     } else {
1155       SmallVector<TemplateArgument, 8> TemplArgs;
1156       Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
1157       TemplateArgumentList *ArgList
1158         = TemplateArgumentList::CreateCopy(C, TemplArgs.data(),
1159                                            TemplArgs.size());
1160       ClassTemplateSpecializationDecl::SpecializedPartialSpecialization *PS
1161           = new (C) ClassTemplateSpecializationDecl::
1162                                              SpecializedPartialSpecialization();
1163       PS->PartialSpecialization
1164           = cast<ClassTemplatePartialSpecializationDecl>(InstD);
1165       PS->TemplateArgs = ArgList;
1166       D->SpecializedTemplate = PS;
1167     }
1168   }
1169 
1170   // Explicit info.
1171   if (TypeSourceInfo *TyInfo = GetTypeSourceInfo(Record, Idx)) {
1172     ClassTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo
1173         = new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
1174     ExplicitInfo->TypeAsWritten = TyInfo;
1175     ExplicitInfo->ExternLoc = ReadSourceLocation(Record, Idx);
1176     ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation(Record, Idx);
1177     D->ExplicitInfo = ExplicitInfo;
1178   }
1179 
1180   SmallVector<TemplateArgument, 8> TemplArgs;
1181   Reader.ReadTemplateArgumentList(TemplArgs, F, Record, Idx);
1182   D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs.data(),
1183                                                      TemplArgs.size());
1184   D->PointOfInstantiation = ReadSourceLocation(Record, Idx);
1185   D->SpecializationKind = (TemplateSpecializationKind)Record[Idx++];
1186 
1187   if (D->isCanonicalDecl()) { // It's kept in the folding set.
1188     ClassTemplateDecl *CanonPattern = ReadDeclAs<ClassTemplateDecl>(Record,Idx);
1189     if (ClassTemplatePartialSpecializationDecl *Partial
1190                        = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
1191       CanonPattern->getCommonPtr()->PartialSpecializations.InsertNode(Partial);
1192     } else {
1193       CanonPattern->getCommonPtr()->Specializations.InsertNode(D);
1194     }
1195   }
1196 }
1197 
1198 void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
1199                                     ClassTemplatePartialSpecializationDecl *D) {
1200   VisitClassTemplateSpecializationDecl(D);
1201 
1202   ASTContext &C = Reader.getContext();
1203   D->TemplateParams = Reader.ReadTemplateParameterList(F, Record, Idx);
1204 
1205   unsigned NumArgs = Record[Idx++];
1206   if (NumArgs) {
1207     D->NumArgsAsWritten = NumArgs;
1208     D->ArgsAsWritten = new (C) TemplateArgumentLoc[NumArgs];
1209     for (unsigned i=0; i != NumArgs; ++i)
1210       D->ArgsAsWritten[i] = Reader.ReadTemplateArgumentLoc(F, Record, Idx);
1211   }
1212 
1213   D->SequenceNumber = Record[Idx++];
1214 
1215   // These are read/set from/to the first declaration.
1216   if (D->getPreviousDeclaration() == 0) {
1217     D->InstantiatedFromMember.setPointer(
1218       ReadDeclAs<ClassTemplatePartialSpecializationDecl>(Record, Idx));
1219     D->InstantiatedFromMember.setInt(Record[Idx++]);
1220   }
1221 }
1222 
1223 void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
1224                                     ClassScopeFunctionSpecializationDecl *D) {
1225   VisitDecl(D);
1226   D->Specialization = ReadDeclAs<CXXMethodDecl>(Record, Idx);
1227 }
1228 
1229 void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1230   VisitRedeclarableTemplateDecl(D);
1231 
1232   if (D->getPreviousDeclaration() == 0) {
1233     // This FunctionTemplateDecl owns a CommonPtr; read it.
1234 
1235     // Read the function specialization declarations.
1236     // FunctionTemplateDecl's FunctionTemplateSpecializationInfos are filled
1237     // when reading the specialized FunctionDecl.
1238     unsigned NumSpecs = Record[Idx++];
1239     while (NumSpecs--)
1240       (void)ReadDecl(Record, Idx);
1241   }
1242 }
1243 
1244 void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
1245   VisitTypeDecl(D);
1246 
1247   D->setDeclaredWithTypename(Record[Idx++]);
1248 
1249   bool Inherited = Record[Idx++];
1250   TypeSourceInfo *DefArg = GetTypeSourceInfo(Record, Idx);
1251   D->setDefaultArgument(DefArg, Inherited);
1252 }
1253 
1254 void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
1255   VisitDeclaratorDecl(D);
1256   // TemplateParmPosition.
1257   D->setDepth(Record[Idx++]);
1258   D->setPosition(Record[Idx++]);
1259   if (D->isExpandedParameterPack()) {
1260     void **Data = reinterpret_cast<void **>(D + 1);
1261     for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
1262       Data[2*I] = Reader.readType(F, Record, Idx).getAsOpaquePtr();
1263       Data[2*I + 1] = GetTypeSourceInfo(Record, Idx);
1264     }
1265   } else {
1266     // Rest of NonTypeTemplateParmDecl.
1267     D->ParameterPack = Record[Idx++];
1268     if (Record[Idx++]) {
1269       Expr *DefArg = Reader.ReadExpr(F);
1270       bool Inherited = Record[Idx++];
1271       D->setDefaultArgument(DefArg, Inherited);
1272    }
1273   }
1274 }
1275 
1276 void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
1277   VisitTemplateDecl(D);
1278   // TemplateParmPosition.
1279   D->setDepth(Record[Idx++]);
1280   D->setPosition(Record[Idx++]);
1281   // Rest of TemplateTemplateParmDecl.
1282   TemplateArgumentLoc Arg = Reader.ReadTemplateArgumentLoc(F, Record, Idx);
1283   bool IsInherited = Record[Idx++];
1284   D->setDefaultArgument(Arg, IsInherited);
1285   D->ParameterPack = Record[Idx++];
1286 }
1287 
1288 void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
1289   VisitRedeclarableTemplateDecl(D);
1290 }
1291 
1292 void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
1293   VisitDecl(D);
1294   D->AssertExpr = Reader.ReadExpr(F);
1295   D->Message = cast<StringLiteral>(Reader.ReadExpr(F));
1296   D->RParenLoc = ReadSourceLocation(Record, Idx);
1297 }
1298 
1299 std::pair<uint64_t, uint64_t>
1300 ASTDeclReader::VisitDeclContext(DeclContext *DC) {
1301   uint64_t LexicalOffset = Record[Idx++];
1302   uint64_t VisibleOffset = Record[Idx++];
1303   return std::make_pair(LexicalOffset, VisibleOffset);
1304 }
1305 
1306 template <typename T>
1307 void ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
1308   enum RedeclKind { NoRedeclaration = 0, PointsToPrevious, PointsToLatest };
1309   RedeclKind Kind = (RedeclKind)Record[Idx++];
1310   switch (Kind) {
1311   default:
1312     llvm_unreachable("Out of sync with ASTDeclWriter::VisitRedeclarable or"
1313                      " messed up reading");
1314   case NoRedeclaration:
1315     break;
1316   case PointsToPrevious: {
1317     DeclID PreviousDeclID = ReadDeclID(Record, Idx);
1318     DeclID FirstDeclID = ReadDeclID(Record, Idx);
1319     // We delay loading of the redeclaration chain to avoid deeply nested calls.
1320     // We temporarily set the first (canonical) declaration as the previous one
1321     // which is the one that matters and mark the real previous DeclID to be
1322     // loaded & attached later on.
1323     D->RedeclLink = typename Redeclarable<T>::PreviousDeclLink(
1324                                 cast_or_null<T>(Reader.GetDecl(FirstDeclID)));
1325     if (PreviousDeclID != FirstDeclID)
1326       Reader.PendingPreviousDecls.push_back(std::make_pair(static_cast<T*>(D),
1327                                                            PreviousDeclID));
1328     break;
1329   }
1330   case PointsToLatest:
1331     D->RedeclLink = typename Redeclarable<T>::LatestDeclLink(
1332                                                    ReadDeclAs<T>(Record, Idx));
1333     break;
1334   }
1335 
1336   assert(!(Kind == PointsToPrevious &&
1337            Reader.FirstLatestDeclIDs.find(ThisDeclID) !=
1338                Reader.FirstLatestDeclIDs.end()) &&
1339          "This decl is not first, it should not be in the map");
1340   if (Kind == PointsToPrevious)
1341     return;
1342 
1343   // This decl is a first one and the latest declaration that it points to is in
1344   // the same AST file. However, if this actually needs to point to a
1345   // redeclaration in another AST file, we need to update it by checking the
1346   // FirstLatestDeclIDs map which tracks this kind of decls.
1347   assert(Reader.GetDecl(ThisDeclID) == static_cast<T*>(D) &&
1348          "Invalid ThisDeclID ?");
1349   ASTReader::FirstLatestDeclIDMap::iterator I
1350       = Reader.FirstLatestDeclIDs.find(ThisDeclID);
1351   if (I != Reader.FirstLatestDeclIDs.end()) {
1352     Decl *NewLatest = Reader.GetDecl(I->second);
1353     D->RedeclLink
1354         = typename Redeclarable<T>::LatestDeclLink(cast_or_null<T>(NewLatest));
1355   }
1356 }
1357 
1358 //===----------------------------------------------------------------------===//
1359 // Attribute Reading
1360 //===----------------------------------------------------------------------===//
1361 
1362 /// \brief Reads attributes from the current stream position.
1363 void ASTReader::ReadAttributes(Module &F, AttrVec &Attrs,
1364                                const RecordData &Record, unsigned &Idx) {
1365   for (unsigned i = 0, e = Record[Idx++]; i != e; ++i) {
1366     Attr *New = 0;
1367     attr::Kind Kind = (attr::Kind)Record[Idx++];
1368     SourceRange Range = ReadSourceRange(F, Record, Idx);
1369 
1370 #include "clang/Serialization/AttrPCHRead.inc"
1371 
1372     assert(New && "Unable to decode attribute?");
1373     Attrs.push_back(New);
1374   }
1375 }
1376 
1377 //===----------------------------------------------------------------------===//
1378 // ASTReader Implementation
1379 //===----------------------------------------------------------------------===//
1380 
1381 /// \brief Note that we have loaded the declaration with the given
1382 /// Index.
1383 ///
1384 /// This routine notes that this declaration has already been loaded,
1385 /// so that future GetDecl calls will return this declaration rather
1386 /// than trying to load a new declaration.
1387 inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
1388   assert(!DeclsLoaded[Index] && "Decl loaded twice?");
1389   DeclsLoaded[Index] = D;
1390 }
1391 
1392 
1393 /// \brief Determine whether the consumer will be interested in seeing
1394 /// this declaration (via HandleTopLevelDecl).
1395 ///
1396 /// This routine should return true for anything that might affect
1397 /// code generation, e.g., inline function definitions, Objective-C
1398 /// declarations with metadata, etc.
1399 static bool isConsumerInterestedIn(Decl *D) {
1400   // An ObjCMethodDecl is never considered as "interesting" because its
1401   // implementation container always is.
1402 
1403   if (isa<FileScopeAsmDecl>(D) ||
1404       isa<ObjCProtocolDecl>(D) ||
1405       isa<ObjCImplDecl>(D))
1406     return true;
1407   if (VarDecl *Var = dyn_cast<VarDecl>(D))
1408     return Var->isFileVarDecl() &&
1409            Var->isThisDeclarationADefinition() == VarDecl::Definition;
1410   if (FunctionDecl *Func = dyn_cast<FunctionDecl>(D))
1411     return Func->doesThisDeclarationHaveABody();
1412 
1413   return false;
1414 }
1415 
1416 /// \brief Get the correct cursor and offset for loading a declaration.
1417 ASTReader::RecordLocation
1418 ASTReader::DeclCursorForID(DeclID ID) {
1419   // See if there's an override.
1420   DeclReplacementMap::iterator It = ReplacedDecls.find(ID);
1421   if (It != ReplacedDecls.end())
1422     return RecordLocation(It->second.first, It->second.second);
1423 
1424   GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
1425   assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
1426   Module *M = I->second;
1427   return RecordLocation(M,
1428            M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS]);
1429 }
1430 
1431 ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
1432   ContinuousRangeMap<uint64_t, Module*, 4>::iterator I
1433     = GlobalBitOffsetsMap.find(GlobalOffset);
1434 
1435   assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map");
1436   return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
1437 }
1438 
1439 uint64_t ASTReader::getGlobalBitOffset(Module &M, uint32_t LocalOffset) {
1440   return LocalOffset + M.GlobalBitOffset;
1441 }
1442 
1443 void ASTDeclReader::attachPreviousDecl(Decl *D, Decl *previous) {
1444   assert(D && previous);
1445   if (TagDecl *TD = dyn_cast<TagDecl>(D)) {
1446     TD->RedeclLink.setPointer(cast<TagDecl>(previous));
1447   } else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
1448     FD->RedeclLink.setPointer(cast<FunctionDecl>(previous));
1449   } else if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
1450     VD->RedeclLink.setPointer(cast<VarDecl>(previous));
1451   } else {
1452     RedeclarableTemplateDecl *TD = cast<RedeclarableTemplateDecl>(D);
1453     TD->CommonOrPrev = cast<RedeclarableTemplateDecl>(previous);
1454   }
1455 }
1456 
1457 void ASTReader::loadAndAttachPreviousDecl(Decl *D, serialization::DeclID ID) {
1458   Decl *previous = GetDecl(ID);
1459   ASTDeclReader::attachPreviousDecl(D, previous);
1460 }
1461 
1462 /// \brief Read the declaration at the given offset from the AST file.
1463 Decl *ASTReader::ReadDeclRecord(DeclID ID) {
1464   unsigned Index = ID - NUM_PREDEF_DECL_IDS;
1465   RecordLocation Loc = DeclCursorForID(ID);
1466   llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
1467   // Keep track of where we are in the stream, then jump back there
1468   // after reading this declaration.
1469   SavedStreamPosition SavedPosition(DeclsCursor);
1470 
1471   ReadingKindTracker ReadingKind(Read_Decl, *this);
1472 
1473   // Note that we are loading a declaration record.
1474   Deserializing ADecl(this);
1475 
1476   DeclsCursor.JumpToBit(Loc.Offset);
1477   RecordData Record;
1478   unsigned Code = DeclsCursor.ReadCode();
1479   unsigned Idx = 0;
1480   ASTDeclReader Reader(*this, *Loc.F, DeclsCursor, ID, Record, Idx);
1481 
1482   Decl *D = 0;
1483   switch ((DeclCode)DeclsCursor.ReadRecord(Code, Record)) {
1484   case DECL_CONTEXT_LEXICAL:
1485   case DECL_CONTEXT_VISIBLE:
1486     llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord");
1487   case DECL_TYPEDEF:
1488     D = TypedefDecl::Create(Context, 0, SourceLocation(), SourceLocation(),
1489                             0, 0);
1490     break;
1491   case DECL_TYPEALIAS:
1492     D = TypeAliasDecl::Create(Context, 0, SourceLocation(), SourceLocation(),
1493                               0, 0);
1494     break;
1495   case DECL_ENUM:
1496     D = EnumDecl::Create(Context, Decl::EmptyShell());
1497     break;
1498   case DECL_RECORD:
1499     D = RecordDecl::Create(Context, Decl::EmptyShell());
1500     break;
1501   case DECL_ENUM_CONSTANT:
1502     D = EnumConstantDecl::Create(Context, 0, SourceLocation(), 0, QualType(),
1503                                  0, llvm::APSInt());
1504     break;
1505   case DECL_FUNCTION:
1506     D = FunctionDecl::Create(Context, 0, SourceLocation(), SourceLocation(),
1507                              DeclarationName(), QualType(), 0);
1508     break;
1509   case DECL_LINKAGE_SPEC:
1510     D = LinkageSpecDecl::Create(Context, 0, SourceLocation(), SourceLocation(),
1511                                 (LinkageSpecDecl::LanguageIDs)0,
1512                                 SourceLocation());
1513     break;
1514   case DECL_LABEL:
1515     D = LabelDecl::Create(Context, 0, SourceLocation(), 0);
1516     break;
1517   case DECL_NAMESPACE:
1518     D = NamespaceDecl::Create(Context, 0, SourceLocation(),
1519                               SourceLocation(), 0);
1520     break;
1521   case DECL_NAMESPACE_ALIAS:
1522     D = NamespaceAliasDecl::Create(Context, 0, SourceLocation(),
1523                                    SourceLocation(), 0,
1524                                    NestedNameSpecifierLoc(),
1525                                    SourceLocation(), 0);
1526     break;
1527   case DECL_USING:
1528     D = UsingDecl::Create(Context, 0, SourceLocation(),
1529                           NestedNameSpecifierLoc(), DeclarationNameInfo(),
1530                           false);
1531     break;
1532   case DECL_USING_SHADOW:
1533     D = UsingShadowDecl::Create(Context, 0, SourceLocation(), 0, 0);
1534     break;
1535   case DECL_USING_DIRECTIVE:
1536     D = UsingDirectiveDecl::Create(Context, 0, SourceLocation(),
1537                                    SourceLocation(), NestedNameSpecifierLoc(),
1538                                    SourceLocation(), 0, 0);
1539     break;
1540   case DECL_UNRESOLVED_USING_VALUE:
1541     D = UnresolvedUsingValueDecl::Create(Context, 0, SourceLocation(),
1542                                          NestedNameSpecifierLoc(),
1543                                          DeclarationNameInfo());
1544     break;
1545   case DECL_UNRESOLVED_USING_TYPENAME:
1546     D = UnresolvedUsingTypenameDecl::Create(Context, 0, SourceLocation(),
1547                                             SourceLocation(),
1548                                             NestedNameSpecifierLoc(),
1549                                             SourceLocation(),
1550                                             DeclarationName());
1551     break;
1552   case DECL_CXX_RECORD:
1553     D = CXXRecordDecl::Create(Context, Decl::EmptyShell());
1554     break;
1555   case DECL_CXX_METHOD:
1556     D = CXXMethodDecl::Create(Context, 0, SourceLocation(),
1557                               DeclarationNameInfo(), QualType(), 0,
1558                               false, SC_None, false, false, SourceLocation());
1559     break;
1560   case DECL_CXX_CONSTRUCTOR:
1561     D = CXXConstructorDecl::Create(Context, Decl::EmptyShell());
1562     break;
1563   case DECL_CXX_DESTRUCTOR:
1564     D = CXXDestructorDecl::Create(Context, Decl::EmptyShell());
1565     break;
1566   case DECL_CXX_CONVERSION:
1567     D = CXXConversionDecl::Create(Context, Decl::EmptyShell());
1568     break;
1569   case DECL_ACCESS_SPEC:
1570     D = AccessSpecDecl::Create(Context, Decl::EmptyShell());
1571     break;
1572   case DECL_FRIEND:
1573     D = FriendDecl::Create(Context, Decl::EmptyShell());
1574     break;
1575   case DECL_FRIEND_TEMPLATE:
1576     D = FriendTemplateDecl::Create(Context, Decl::EmptyShell());
1577     break;
1578   case DECL_CLASS_TEMPLATE:
1579     D = ClassTemplateDecl::Create(Context, Decl::EmptyShell());
1580     break;
1581   case DECL_CLASS_TEMPLATE_SPECIALIZATION:
1582     D = ClassTemplateSpecializationDecl::Create(Context, Decl::EmptyShell());
1583     break;
1584   case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
1585     D = ClassTemplatePartialSpecializationDecl::Create(Context,
1586                                                        Decl::EmptyShell());
1587     break;
1588   case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
1589     D = ClassScopeFunctionSpecializationDecl::Create(Context,
1590                                                      Decl::EmptyShell());
1591     break;
1592   case DECL_FUNCTION_TEMPLATE:
1593       D = FunctionTemplateDecl::Create(Context, Decl::EmptyShell());
1594     break;
1595   case DECL_TEMPLATE_TYPE_PARM:
1596     D = TemplateTypeParmDecl::Create(Context, Decl::EmptyShell());
1597     break;
1598   case DECL_NON_TYPE_TEMPLATE_PARM:
1599     D = NonTypeTemplateParmDecl::Create(Context, 0, SourceLocation(),
1600                                         SourceLocation(), 0, 0, 0, QualType(),
1601                                         false, 0);
1602     break;
1603   case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
1604     D = NonTypeTemplateParmDecl::Create(Context, 0, SourceLocation(),
1605                                         SourceLocation(), 0, 0, 0, QualType(),
1606                                         0, 0, Record[Idx++], 0);
1607     break;
1608   case DECL_TEMPLATE_TEMPLATE_PARM:
1609     D = TemplateTemplateParmDecl::Create(Context, 0, SourceLocation(), 0, 0,
1610                                          false, 0, 0);
1611     break;
1612   case DECL_TYPE_ALIAS_TEMPLATE:
1613     D = TypeAliasTemplateDecl::Create(Context, Decl::EmptyShell());
1614     break;
1615   case DECL_STATIC_ASSERT:
1616     D = StaticAssertDecl::Create(Context, 0, SourceLocation(), 0, 0,
1617                                  SourceLocation());
1618     break;
1619 
1620   case DECL_OBJC_METHOD:
1621     D = ObjCMethodDecl::Create(Context, SourceLocation(), SourceLocation(),
1622                                Selector(), QualType(), 0, 0);
1623     break;
1624   case DECL_OBJC_INTERFACE:
1625     D = ObjCInterfaceDecl::Create(Context, 0, SourceLocation(), 0);
1626     break;
1627   case DECL_OBJC_IVAR:
1628     D = ObjCIvarDecl::Create(Context, 0, SourceLocation(), SourceLocation(),
1629                              0, QualType(), 0, ObjCIvarDecl::None);
1630     break;
1631   case DECL_OBJC_PROTOCOL:
1632     D = ObjCProtocolDecl::Create(Context, 0, 0, SourceLocation(),
1633                                  SourceLocation());
1634     break;
1635   case DECL_OBJC_AT_DEFS_FIELD:
1636     D = ObjCAtDefsFieldDecl::Create(Context, 0, SourceLocation(),
1637                                     SourceLocation(), 0, QualType(), 0);
1638     break;
1639   case DECL_OBJC_CLASS:
1640     D = ObjCClassDecl::Create(Context, 0, SourceLocation());
1641     break;
1642   case DECL_OBJC_FORWARD_PROTOCOL:
1643     D = ObjCForwardProtocolDecl::Create(Context, 0, SourceLocation());
1644     break;
1645   case DECL_OBJC_CATEGORY:
1646     D = ObjCCategoryDecl::Create(Context, Decl::EmptyShell());
1647     break;
1648   case DECL_OBJC_CATEGORY_IMPL:
1649     D = ObjCCategoryImplDecl::Create(Context, 0, 0, 0, SourceLocation(),
1650                                      SourceLocation());
1651     break;
1652   case DECL_OBJC_IMPLEMENTATION:
1653     D = ObjCImplementationDecl::Create(Context, 0, 0, 0, SourceLocation(),
1654                                        SourceLocation());
1655     break;
1656   case DECL_OBJC_COMPATIBLE_ALIAS:
1657     D = ObjCCompatibleAliasDecl::Create(Context, 0, SourceLocation(), 0, 0);
1658     break;
1659   case DECL_OBJC_PROPERTY:
1660     D = ObjCPropertyDecl::Create(Context, 0, SourceLocation(), 0, SourceLocation(),
1661                                  0);
1662     break;
1663   case DECL_OBJC_PROPERTY_IMPL:
1664     D = ObjCPropertyImplDecl::Create(Context, 0, SourceLocation(),
1665                                      SourceLocation(), 0,
1666                                      ObjCPropertyImplDecl::Dynamic, 0,
1667                                      SourceLocation());
1668     break;
1669   case DECL_FIELD:
1670     D = FieldDecl::Create(Context, 0, SourceLocation(), SourceLocation(), 0,
1671                           QualType(), 0, 0, false, false);
1672     break;
1673   case DECL_INDIRECTFIELD:
1674     D = IndirectFieldDecl::Create(Context, 0, SourceLocation(), 0, QualType(),
1675                                   0, 0);
1676     break;
1677   case DECL_VAR:
1678     D = VarDecl::Create(Context, 0, SourceLocation(), SourceLocation(), 0,
1679                         QualType(), 0, SC_None, SC_None);
1680     break;
1681 
1682   case DECL_IMPLICIT_PARAM:
1683     D = ImplicitParamDecl::Create(Context, 0, SourceLocation(), 0, QualType());
1684     break;
1685 
1686   case DECL_PARM_VAR:
1687     D = ParmVarDecl::Create(Context, 0, SourceLocation(), SourceLocation(), 0,
1688                             QualType(), 0, SC_None, SC_None, 0);
1689     break;
1690   case DECL_FILE_SCOPE_ASM:
1691     D = FileScopeAsmDecl::Create(Context, 0, 0, SourceLocation(),
1692                                  SourceLocation());
1693     break;
1694   case DECL_BLOCK:
1695     D = BlockDecl::Create(Context, 0, SourceLocation());
1696     break;
1697   case DECL_CXX_BASE_SPECIFIERS:
1698     Error("attempt to read a C++ base-specifier record as a declaration");
1699     return 0;
1700   }
1701 
1702   assert(D && "Unknown declaration reading AST file");
1703   LoadedDecl(Index, D);
1704   Reader.Visit(D);
1705 
1706   // If this declaration is also a declaration context, get the
1707   // offsets for its tables of lexical and visible declarations.
1708   if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
1709     std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
1710     if (Offsets.first || Offsets.second) {
1711       if (Offsets.first != 0)
1712         DC->setHasExternalLexicalStorage(true);
1713       if (Offsets.second != 0)
1714         DC->setHasExternalVisibleStorage(true);
1715       if (ReadDeclContextStorage(*Loc.F, DeclsCursor, Offsets,
1716                                  Loc.F->DeclContextInfos[DC]))
1717         return 0;
1718     }
1719 
1720     // Now add the pending visible updates for this decl context, if it has any.
1721     DeclContextVisibleUpdatesPending::iterator I =
1722         PendingVisibleUpdates.find(ID);
1723     if (I != PendingVisibleUpdates.end()) {
1724       // There are updates. This means the context has external visible
1725       // storage, even if the original stored version didn't.
1726       DC->setHasExternalVisibleStorage(true);
1727       DeclContextVisibleUpdates &U = I->second;
1728       for (DeclContextVisibleUpdates::iterator UI = U.begin(), UE = U.end();
1729            UI != UE; ++UI) {
1730         UI->second->DeclContextInfos[DC].NameLookupTableData = UI->first;
1731       }
1732       PendingVisibleUpdates.erase(I);
1733     }
1734   }
1735   assert(Idx == Record.size());
1736 
1737   // Load any relevant update records.
1738   loadDeclUpdateRecords(ID, D);
1739 
1740   if (ObjCChainedCategoriesInterfaces.count(ID))
1741     loadObjCChainedCategories(ID, cast<ObjCInterfaceDecl>(D));
1742 
1743   // If we have deserialized a declaration that has a definition the
1744   // AST consumer might need to know about, queue it.
1745   // We don't pass it to the consumer immediately because we may be in recursive
1746   // loading, and some declarations may still be initializing.
1747   if (isConsumerInterestedIn(D))
1748       InterestingDecls.push_back(D);
1749 
1750   return D;
1751 }
1752 
1753 void ASTReader::loadDeclUpdateRecords(serialization::DeclID ID, Decl *D) {
1754   // The declaration may have been modified by files later in the chain.
1755   // If this is the case, read the record containing the updates from each file
1756   // and pass it to ASTDeclReader to make the modifications.
1757   DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
1758   if (UpdI != DeclUpdateOffsets.end()) {
1759     FileOffsetsTy &UpdateOffsets = UpdI->second;
1760     for (FileOffsetsTy::iterator
1761          I = UpdateOffsets.begin(), E = UpdateOffsets.end(); I != E; ++I) {
1762       Module *F = I->first;
1763       uint64_t Offset = I->second;
1764       llvm::BitstreamCursor &Cursor = F->DeclsCursor;
1765       SavedStreamPosition SavedPosition(Cursor);
1766       Cursor.JumpToBit(Offset);
1767       RecordData Record;
1768       unsigned Code = Cursor.ReadCode();
1769       unsigned RecCode = Cursor.ReadRecord(Code, Record);
1770       (void)RecCode;
1771       assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!");
1772 
1773       unsigned Idx = 0;
1774       ASTDeclReader Reader(*this, *F, Cursor, ID, Record, Idx);
1775       Reader.UpdateDecl(D, *F, Record);
1776     }
1777   }
1778 }
1779 
1780 namespace {
1781   /// \brief Given an ObjC interface, goes through the modules and links to the
1782   /// interface all the categories for it.
1783   class ObjCChainedCategoriesVisitor {
1784     ASTReader &Reader;
1785     serialization::GlobalDeclID InterfaceID;
1786     ObjCInterfaceDecl *Interface;
1787     ObjCCategoryDecl *GlobHeadCat, *GlobTailCat;
1788     llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
1789 
1790   public:
1791     ObjCChainedCategoriesVisitor(ASTReader &Reader,
1792                                  serialization::GlobalDeclID InterfaceID,
1793                                  ObjCInterfaceDecl *Interface)
1794       : Reader(Reader), InterfaceID(InterfaceID), Interface(Interface),
1795         GlobHeadCat(0), GlobTailCat(0) { }
1796 
1797     static bool visit(Module &M, void *UserData) {
1798       return static_cast<ObjCChainedCategoriesVisitor *>(UserData)->visit(M);
1799     }
1800 
1801     bool visit(Module &M) {
1802       if (Reader.isDeclIDFromModule(InterfaceID, M))
1803         return true; // We reached the module where the interface originated
1804                     // from. Stop traversing the imported modules.
1805 
1806       Module::ChainedObjCCategoriesMap::iterator
1807         I = M.ChainedObjCCategories.find(InterfaceID);
1808       if (I == M.ChainedObjCCategories.end())
1809         return false;
1810 
1811       ObjCCategoryDecl *
1812         HeadCat = Reader.GetLocalDeclAs<ObjCCategoryDecl>(M, I->second.first);
1813       ObjCCategoryDecl *
1814         TailCat = Reader.GetLocalDeclAs<ObjCCategoryDecl>(M, I->second.second);
1815 
1816       addCategories(HeadCat, TailCat);
1817       return false;
1818     }
1819 
1820     void addCategories(ObjCCategoryDecl *HeadCat,
1821                        ObjCCategoryDecl *TailCat = 0) {
1822       if (!HeadCat) {
1823         assert(!TailCat);
1824         return;
1825       }
1826 
1827       if (!TailCat) {
1828         TailCat = HeadCat;
1829         while (TailCat->getNextClassCategory())
1830           TailCat = TailCat->getNextClassCategory();
1831       }
1832 
1833       if (!GlobHeadCat) {
1834         GlobHeadCat = HeadCat;
1835         GlobTailCat = TailCat;
1836       } else {
1837         ASTDeclReader::setNextObjCCategory(GlobTailCat, HeadCat);
1838         GlobTailCat = TailCat;
1839       }
1840 
1841       llvm::DenseSet<DeclarationName> Checked;
1842       for (ObjCCategoryDecl *Cat = HeadCat,
1843                             *CatEnd = TailCat->getNextClassCategory();
1844              Cat != CatEnd; Cat = Cat->getNextClassCategory()) {
1845         if (Checked.count(Cat->getDeclName()))
1846           continue;
1847         Checked.insert(Cat->getDeclName());
1848         checkForDuplicate(Cat);
1849       }
1850     }
1851 
1852     /// \brief Warns for duplicate categories that come from different modules.
1853     void checkForDuplicate(ObjCCategoryDecl *Cat) {
1854       DeclarationName Name = Cat->getDeclName();
1855       // Find the top category with the same name. We do not want to warn for
1856       // duplicates along the established chain because there were already
1857       // warnings for them when the module was created. We only want to warn for
1858       // duplicates between non-dependent modules:
1859       //
1860       //   MT     //
1861       //  /  \    //
1862       // ML  MR   //
1863       //
1864       // We want to warn for duplicates between ML and MR,not between ML and MT.
1865       //
1866       // FIXME: We should not warn for duplicates in diamond:
1867       //
1868       //   MT     //
1869       //  /  \    //
1870       // ML  MR   //
1871       //  \  /    //
1872       //   MB     //
1873       //
1874       // If there are duplicates in ML/MR, there will be warning when creating
1875       // MB *and* when importing MB. We should not warn when importing.
1876       for (ObjCCategoryDecl *Next = Cat->getNextClassCategory(); Next;
1877              Next = Next->getNextClassCategory()) {
1878         if (Next->getDeclName() == Name)
1879           Cat = Next;
1880       }
1881 
1882       ObjCCategoryDecl *&PrevCat = NameCategoryMap[Name];
1883       if (!PrevCat)
1884         PrevCat = Cat;
1885 
1886       if (PrevCat != Cat) {
1887         Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
1888           << Interface->getDeclName() << Name;
1889         Reader.Diag(PrevCat->getLocation(), diag::note_previous_definition);
1890       }
1891     }
1892 
1893     ObjCCategoryDecl *getHeadCategory() const { return GlobHeadCat; }
1894   };
1895 }
1896 
1897 void ASTReader::loadObjCChainedCategories(serialization::GlobalDeclID ID,
1898                                           ObjCInterfaceDecl *D) {
1899   ObjCChainedCategoriesVisitor Visitor(*this, ID, D);
1900   ModuleMgr.visit(ObjCChainedCategoriesVisitor::visit, &Visitor);
1901   // Also add the categories that the interface already links to.
1902   Visitor.addCategories(D->getCategoryList());
1903   D->setCategoryList(Visitor.getHeadCategory());
1904 }
1905 
1906 void ASTDeclReader::UpdateDecl(Decl *D, Module &Module,
1907                                const RecordData &Record) {
1908   unsigned Idx = 0;
1909   while (Idx < Record.size()) {
1910     switch ((DeclUpdateKind)Record[Idx++]) {
1911     case UPD_CXX_SET_DEFINITIONDATA: {
1912       CXXRecordDecl *RD = cast<CXXRecordDecl>(D);
1913       CXXRecordDecl *DefinitionDecl
1914         = Reader.ReadDeclAs<CXXRecordDecl>(Module, Record, Idx);
1915       assert(!RD->DefinitionData && "DefinitionData is already set!");
1916       InitializeCXXDefinitionData(RD, DefinitionDecl, Record, Idx);
1917       break;
1918     }
1919 
1920     case UPD_CXX_ADDED_IMPLICIT_MEMBER:
1921       cast<CXXRecordDecl>(D)->addedMember(Reader.ReadDecl(Module, Record, Idx));
1922       break;
1923 
1924     case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
1925       // It will be added to the template's specializations set when loaded.
1926       (void)Reader.ReadDecl(Module, Record, Idx);
1927       break;
1928 
1929     case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
1930       NamespaceDecl *Anon
1931         = Reader.ReadDeclAs<NamespaceDecl>(Module, Record, Idx);
1932       // Guard against these being loaded out of original order. Don't use
1933       // getNextNamespace(), since it tries to access the context and can't in
1934       // the middle of deserialization.
1935       if (!Anon->NextNamespace) {
1936         if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(D))
1937           TU->setAnonymousNamespace(Anon);
1938         else
1939           cast<NamespaceDecl>(D)->OrigOrAnonNamespace.setPointer(Anon);
1940       }
1941       break;
1942     }
1943 
1944     case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER:
1945       cast<VarDecl>(D)->getMemberSpecializationInfo()->setPointOfInstantiation(
1946           Reader.ReadSourceLocation(Module, Record, Idx));
1947       break;
1948     }
1949   }
1950 }
1951