1 //===--- ASTWriterDecl.cpp - Declaration Serialization --------------------===//
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 serialization for Declarations.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/Serialization/ASTWriter.h"
15 #include "ASTCommon.h"
16 #include "clang/AST/DeclVisitor.h"
17 #include "clang/AST/DeclCXX.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/AST/Expr.h"
20 #include "clang/AST/DeclContextInternals.h"
21 #include "clang/Basic/SourceManager.h"
22 #include "llvm/ADT/Twine.h"
23 #include "llvm/Bitcode/BitstreamWriter.h"
24 #include "llvm/Support/ErrorHandling.h"
25 using namespace clang;
26 using namespace serialization;
27 
28 //===----------------------------------------------------------------------===//
29 // Declaration serialization
30 //===----------------------------------------------------------------------===//
31 
32 namespace clang {
33   class ASTDeclWriter : public DeclVisitor<ASTDeclWriter, void> {
34 
35     ASTWriter &Writer;
36     ASTContext &Context;
37     typedef ASTWriter::RecordData RecordData;
38     RecordData &Record;
39 
40   public:
41     serialization::DeclCode Code;
42     unsigned AbbrevToUse;
43 
44     ASTDeclWriter(ASTWriter &Writer, ASTContext &Context, RecordData &Record)
45       : Writer(Writer), Context(Context), Record(Record) {
46     }
47 
48     void Visit(Decl *D);
49 
50     void VisitDecl(Decl *D);
51     void VisitTranslationUnitDecl(TranslationUnitDecl *D);
52     void VisitNamedDecl(NamedDecl *D);
53     void VisitLabelDecl(LabelDecl *LD);
54     void VisitNamespaceDecl(NamespaceDecl *D);
55     void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
56     void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
57     void VisitTypeDecl(TypeDecl *D);
58     void VisitTypedefNameDecl(TypedefNameDecl *D);
59     void VisitTypedefDecl(TypedefDecl *D);
60     void VisitTypeAliasDecl(TypeAliasDecl *D);
61     void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
62     void VisitTagDecl(TagDecl *D);
63     void VisitEnumDecl(EnumDecl *D);
64     void VisitRecordDecl(RecordDecl *D);
65     void VisitCXXRecordDecl(CXXRecordDecl *D);
66     void VisitClassTemplateSpecializationDecl(
67                                             ClassTemplateSpecializationDecl *D);
68     void VisitClassTemplatePartialSpecializationDecl(
69                                      ClassTemplatePartialSpecializationDecl *D);
70     void VisitClassScopeFunctionSpecializationDecl(
71                                        ClassScopeFunctionSpecializationDecl *D);
72     void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
73     void VisitValueDecl(ValueDecl *D);
74     void VisitEnumConstantDecl(EnumConstantDecl *D);
75     void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
76     void VisitDeclaratorDecl(DeclaratorDecl *D);
77     void VisitFunctionDecl(FunctionDecl *D);
78     void VisitCXXMethodDecl(CXXMethodDecl *D);
79     void VisitCXXConstructorDecl(CXXConstructorDecl *D);
80     void VisitCXXDestructorDecl(CXXDestructorDecl *D);
81     void VisitCXXConversionDecl(CXXConversionDecl *D);
82     void VisitFieldDecl(FieldDecl *D);
83     void VisitIndirectFieldDecl(IndirectFieldDecl *D);
84     void VisitVarDecl(VarDecl *D);
85     void VisitImplicitParamDecl(ImplicitParamDecl *D);
86     void VisitParmVarDecl(ParmVarDecl *D);
87     void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
88     void VisitTemplateDecl(TemplateDecl *D);
89     void VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
90     void VisitClassTemplateDecl(ClassTemplateDecl *D);
91     void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
92     void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
93     void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
94     void VisitUsingDecl(UsingDecl *D);
95     void VisitUsingShadowDecl(UsingShadowDecl *D);
96     void VisitLinkageSpecDecl(LinkageSpecDecl *D);
97     void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
98     void VisitImportDecl(ImportDecl *D);
99     void VisitAccessSpecDecl(AccessSpecDecl *D);
100     void VisitFriendDecl(FriendDecl *D);
101     void VisitFriendTemplateDecl(FriendTemplateDecl *D);
102     void VisitStaticAssertDecl(StaticAssertDecl *D);
103     void VisitBlockDecl(BlockDecl *D);
104 
105     void VisitDeclContext(DeclContext *DC, uint64_t LexicalOffset,
106                           uint64_t VisibleOffset);
107     template <typename T> void VisitRedeclarable(Redeclarable<T> *D);
108 
109 
110     // FIXME: Put in the same order is DeclNodes.td?
111     void VisitObjCMethodDecl(ObjCMethodDecl *D);
112     void VisitObjCContainerDecl(ObjCContainerDecl *D);
113     void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
114     void VisitObjCIvarDecl(ObjCIvarDecl *D);
115     void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
116     void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
117     void VisitObjCClassDecl(ObjCClassDecl *D);
118     void VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D);
119     void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
120     void VisitObjCImplDecl(ObjCImplDecl *D);
121     void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
122     void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
123     void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
124     void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
125     void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
126   };
127 }
128 
129 void ASTDeclWriter::Visit(Decl *D) {
130   DeclVisitor<ASTDeclWriter>::Visit(D);
131 
132   // Source locations require array (variable-length) abbreviations.  The
133   // abbreviation infrastructure requires that arrays are encoded last, so
134   // we handle it here in the case of those classes derived from DeclaratorDecl
135   if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)){
136     Writer.AddTypeSourceInfo(DD->getTypeSourceInfo(), Record);
137   }
138 
139   // Handle FunctionDecl's body here and write it after all other Stmts/Exprs
140   // have been written. We want it last because we will not read it back when
141   // retrieving it from the AST, we'll just lazily set the offset.
142   if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
143     Record.push_back(FD->doesThisDeclarationHaveABody());
144     if (FD->doesThisDeclarationHaveABody())
145       Writer.AddStmt(FD->getBody());
146   }
147 }
148 
149 void ASTDeclWriter::VisitDecl(Decl *D) {
150   Writer.AddDeclRef(cast_or_null<Decl>(D->getDeclContext()), Record);
151   Writer.AddDeclRef(cast_or_null<Decl>(D->getLexicalDeclContext()), Record);
152   Record.push_back(D->isInvalidDecl());
153   Record.push_back(D->hasAttrs());
154   if (D->hasAttrs())
155     Writer.WriteAttributes(D->getAttrs(), Record);
156   Record.push_back(D->isImplicit());
157   Record.push_back(D->isUsed(false));
158   Record.push_back(D->isReferenced());
159   Record.push_back(D->TopLevelDeclInObjCContainer);
160   Record.push_back(D->getAccess());
161   Record.push_back(D->ModulePrivate);
162   Record.push_back(Writer.inferSubmoduleIDFromLocation(D->getLocation()));
163 }
164 
165 void ASTDeclWriter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
166   llvm_unreachable("Translation units aren't directly serialized");
167 }
168 
169 void ASTDeclWriter::VisitNamedDecl(NamedDecl *D) {
170   VisitDecl(D);
171   Writer.AddDeclarationName(D->getDeclName(), Record);
172 }
173 
174 void ASTDeclWriter::VisitTypeDecl(TypeDecl *D) {
175   VisitNamedDecl(D);
176   Writer.AddSourceLocation(D->getLocStart(), Record);
177   Writer.AddTypeRef(QualType(D->getTypeForDecl(), 0), Record);
178 }
179 
180 void ASTDeclWriter::VisitTypedefNameDecl(TypedefNameDecl *D) {
181   VisitRedeclarable(D);
182   VisitTypeDecl(D);
183   Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
184 }
185 
186 void ASTDeclWriter::VisitTypedefDecl(TypedefDecl *D) {
187   VisitTypedefNameDecl(D);
188   if (!D->hasAttrs() &&
189       !D->isImplicit() &&
190       !D->isUsed(false) &&
191       !D->getPreviousDeclaration() &&
192       !D->isInvalidDecl() &&
193       !D->isReferenced() &&
194       !D->isTopLevelDeclInObjCContainer() &&
195       D->getAccess() == AS_none &&
196       !D->isModulePrivate() &&
197       D->getDeclName().getNameKind() == DeclarationName::Identifier)
198     AbbrevToUse = Writer.getDeclTypedefAbbrev();
199 
200   Code = serialization::DECL_TYPEDEF;
201 }
202 
203 void ASTDeclWriter::VisitTypeAliasDecl(TypeAliasDecl *D) {
204   VisitTypedefNameDecl(D);
205   Code = serialization::DECL_TYPEALIAS;
206 }
207 
208 void ASTDeclWriter::VisitTagDecl(TagDecl *D) {
209   VisitRedeclarable(D);
210   VisitTypeDecl(D);
211   Record.push_back(D->getIdentifierNamespace());
212   Record.push_back((unsigned)D->getTagKind()); // FIXME: stable encoding
213   Record.push_back(D->isCompleteDefinition());
214   Record.push_back(D->isEmbeddedInDeclarator());
215   Record.push_back(D->isFreeStanding());
216   Writer.AddSourceLocation(D->getRBraceLoc(), Record);
217   Record.push_back(D->hasExtInfo());
218   if (D->hasExtInfo())
219     Writer.AddQualifierInfo(*D->getExtInfo(), Record);
220   else
221     Writer.AddDeclRef(D->getTypedefNameForAnonDecl(), Record);
222 }
223 
224 void ASTDeclWriter::VisitEnumDecl(EnumDecl *D) {
225   VisitTagDecl(D);
226   Writer.AddTypeSourceInfo(D->getIntegerTypeSourceInfo(), Record);
227   if (!D->getIntegerTypeSourceInfo())
228     Writer.AddTypeRef(D->getIntegerType(), Record);
229   Writer.AddTypeRef(D->getPromotionType(), Record);
230   Record.push_back(D->getNumPositiveBits());
231   Record.push_back(D->getNumNegativeBits());
232   Record.push_back(D->isScoped());
233   Record.push_back(D->isScopedUsingClassTag());
234   Record.push_back(D->isFixed());
235   Writer.AddDeclRef(D->getInstantiatedFromMemberEnum(), Record);
236 
237   if (!D->hasAttrs() &&
238       !D->isImplicit() &&
239       !D->isUsed(false) &&
240       !D->hasExtInfo() &&
241       !D->getPreviousDeclaration() &&
242       !D->isInvalidDecl() &&
243       !D->isReferenced() &&
244       !D->isTopLevelDeclInObjCContainer() &&
245       D->getAccess() == AS_none &&
246       !D->isModulePrivate() &&
247       !CXXRecordDecl::classofKind(D->getKind()) &&
248       !D->getIntegerTypeSourceInfo() &&
249       D->getDeclName().getNameKind() == DeclarationName::Identifier)
250     AbbrevToUse = Writer.getDeclEnumAbbrev();
251 
252   Code = serialization::DECL_ENUM;
253 }
254 
255 void ASTDeclWriter::VisitRecordDecl(RecordDecl *D) {
256   VisitTagDecl(D);
257   Record.push_back(D->hasFlexibleArrayMember());
258   Record.push_back(D->isAnonymousStructOrUnion());
259   Record.push_back(D->hasObjectMember());
260 
261   if (!D->hasAttrs() &&
262       !D->isImplicit() &&
263       !D->isUsed(false) &&
264       !D->hasExtInfo() &&
265       !D->getPreviousDeclaration() &&
266       !D->isInvalidDecl() &&
267       !D->isReferenced() &&
268       !D->isTopLevelDeclInObjCContainer() &&
269       D->getAccess() == AS_none &&
270       !D->isModulePrivate() &&
271       !CXXRecordDecl::classofKind(D->getKind()) &&
272       D->getDeclName().getNameKind() == DeclarationName::Identifier)
273     AbbrevToUse = Writer.getDeclRecordAbbrev();
274 
275   Code = serialization::DECL_RECORD;
276 }
277 
278 void ASTDeclWriter::VisitValueDecl(ValueDecl *D) {
279   VisitNamedDecl(D);
280   Writer.AddTypeRef(D->getType(), Record);
281 }
282 
283 void ASTDeclWriter::VisitEnumConstantDecl(EnumConstantDecl *D) {
284   VisitValueDecl(D);
285   Record.push_back(D->getInitExpr()? 1 : 0);
286   if (D->getInitExpr())
287     Writer.AddStmt(D->getInitExpr());
288   Writer.AddAPSInt(D->getInitVal(), Record);
289 
290   Code = serialization::DECL_ENUM_CONSTANT;
291 }
292 
293 void ASTDeclWriter::VisitDeclaratorDecl(DeclaratorDecl *D) {
294   VisitValueDecl(D);
295   Writer.AddSourceLocation(D->getInnerLocStart(), Record);
296   Record.push_back(D->hasExtInfo());
297   if (D->hasExtInfo())
298     Writer.AddQualifierInfo(*D->getExtInfo(), Record);
299 }
300 
301 void ASTDeclWriter::VisitFunctionDecl(FunctionDecl *D) {
302   VisitRedeclarable(D);
303   VisitDeclaratorDecl(D);
304 
305   Writer.AddDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record);
306   Record.push_back(D->getIdentifierNamespace());
307   Record.push_back(D->getTemplatedKind());
308   switch (D->getTemplatedKind()) {
309   default: llvm_unreachable("Unhandled TemplatedKind!");
310   case FunctionDecl::TK_NonTemplate:
311     break;
312   case FunctionDecl::TK_FunctionTemplate:
313     Writer.AddDeclRef(D->getDescribedFunctionTemplate(), Record);
314     break;
315   case FunctionDecl::TK_MemberSpecialization: {
316     MemberSpecializationInfo *MemberInfo = D->getMemberSpecializationInfo();
317     Writer.AddDeclRef(MemberInfo->getInstantiatedFrom(), Record);
318     Record.push_back(MemberInfo->getTemplateSpecializationKind());
319     Writer.AddSourceLocation(MemberInfo->getPointOfInstantiation(), Record);
320     break;
321   }
322   case FunctionDecl::TK_FunctionTemplateSpecialization: {
323     FunctionTemplateSpecializationInfo *
324       FTSInfo = D->getTemplateSpecializationInfo();
325     Writer.AddDeclRef(FTSInfo->getTemplate(), Record);
326     Record.push_back(FTSInfo->getTemplateSpecializationKind());
327 
328     // Template arguments.
329     Writer.AddTemplateArgumentList(FTSInfo->TemplateArguments, Record);
330 
331     // Template args as written.
332     Record.push_back(FTSInfo->TemplateArgumentsAsWritten != 0);
333     if (FTSInfo->TemplateArgumentsAsWritten) {
334       Record.push_back(FTSInfo->TemplateArgumentsAsWritten->NumTemplateArgs);
335       for (int i=0, e = FTSInfo->TemplateArgumentsAsWritten->NumTemplateArgs;
336              i!=e; ++i)
337         Writer.AddTemplateArgumentLoc((*FTSInfo->TemplateArgumentsAsWritten)[i],
338                                       Record);
339       Writer.AddSourceLocation(FTSInfo->TemplateArgumentsAsWritten->LAngleLoc,
340                                Record);
341       Writer.AddSourceLocation(FTSInfo->TemplateArgumentsAsWritten->RAngleLoc,
342                                Record);
343     }
344 
345     Writer.AddSourceLocation(FTSInfo->getPointOfInstantiation(), Record);
346 
347     if (D->isCanonicalDecl()) {
348       // Write the template that contains the specializations set. We will
349       // add a FunctionTemplateSpecializationInfo to it when reading.
350       Writer.AddDeclRef(FTSInfo->getTemplate()->getCanonicalDecl(), Record);
351     }
352     break;
353   }
354   case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
355     DependentFunctionTemplateSpecializationInfo *
356       DFTSInfo = D->getDependentSpecializationInfo();
357 
358     // Templates.
359     Record.push_back(DFTSInfo->getNumTemplates());
360     for (int i=0, e = DFTSInfo->getNumTemplates(); i != e; ++i)
361       Writer.AddDeclRef(DFTSInfo->getTemplate(i), Record);
362 
363     // Templates args.
364     Record.push_back(DFTSInfo->getNumTemplateArgs());
365     for (int i=0, e = DFTSInfo->getNumTemplateArgs(); i != e; ++i)
366       Writer.AddTemplateArgumentLoc(DFTSInfo->getTemplateArg(i), Record);
367     Writer.AddSourceLocation(DFTSInfo->getLAngleLoc(), Record);
368     Writer.AddSourceLocation(DFTSInfo->getRAngleLoc(), Record);
369     break;
370   }
371   }
372 
373   // FunctionDecl's body is handled last at ASTWriterDecl::Visit,
374   // after everything else is written.
375 
376   Record.push_back(D->getStorageClass()); // FIXME: stable encoding
377   Record.push_back(D->getStorageClassAsWritten());
378   Record.push_back(D->IsInline);
379   Record.push_back(D->isInlineSpecified());
380   Record.push_back(D->isVirtualAsWritten());
381   Record.push_back(D->isPure());
382   Record.push_back(D->hasInheritedPrototype());
383   Record.push_back(D->hasWrittenPrototype());
384   Record.push_back(D->isDeletedAsWritten());
385   Record.push_back(D->isTrivial());
386   Record.push_back(D->isDefaulted());
387   Record.push_back(D->isExplicitlyDefaulted());
388   Record.push_back(D->hasImplicitReturnZero());
389   Record.push_back(D->isConstexpr());
390   Writer.AddSourceLocation(D->getLocEnd(), Record);
391 
392   Record.push_back(D->param_size());
393   for (FunctionDecl::param_iterator P = D->param_begin(), PEnd = D->param_end();
394        P != PEnd; ++P)
395     Writer.AddDeclRef(*P, Record);
396   Code = serialization::DECL_FUNCTION;
397 }
398 
399 void ASTDeclWriter::VisitObjCMethodDecl(ObjCMethodDecl *D) {
400   VisitNamedDecl(D);
401   // FIXME: convert to LazyStmtPtr?
402   // Unlike C/C++, method bodies will never be in header files.
403   bool HasBodyStuff = D->getBody() != 0     ||
404                       D->getSelfDecl() != 0 || D->getCmdDecl() != 0;
405   Record.push_back(HasBodyStuff);
406   if (HasBodyStuff) {
407     Writer.AddStmt(D->getBody());
408     Writer.AddDeclRef(D->getSelfDecl(), Record);
409     Writer.AddDeclRef(D->getCmdDecl(), Record);
410   }
411   Record.push_back(D->isInstanceMethod());
412   Record.push_back(D->isVariadic());
413   Record.push_back(D->isSynthesized());
414   Record.push_back(D->isDefined());
415 
416   Record.push_back(D->IsRedeclaration);
417   Record.push_back(D->HasRedeclaration);
418   if (D->HasRedeclaration) {
419     assert(Context.getObjCMethodRedeclaration(D));
420     Writer.AddDeclRef(Context.getObjCMethodRedeclaration(D), Record);
421   }
422 
423   // FIXME: stable encoding for @required/@optional
424   Record.push_back(D->getImplementationControl());
425   // FIXME: stable encoding for in/out/inout/bycopy/byref/oneway
426   Record.push_back(D->getObjCDeclQualifier());
427   Record.push_back(D->hasRelatedResultType());
428   Writer.AddTypeRef(D->getResultType(), Record);
429   Writer.AddTypeSourceInfo(D->getResultTypeSourceInfo(), Record);
430   Writer.AddSourceLocation(D->getLocEnd(), Record);
431   Record.push_back(D->param_size());
432   for (ObjCMethodDecl::param_iterator P = D->param_begin(),
433                                    PEnd = D->param_end(); P != PEnd; ++P)
434     Writer.AddDeclRef(*P, Record);
435 
436   Record.push_back(D->SelLocsKind);
437   unsigned NumStoredSelLocs = D->getNumStoredSelLocs();
438   SourceLocation *SelLocs = D->getStoredSelLocs();
439   Record.push_back(NumStoredSelLocs);
440   for (unsigned i = 0; i != NumStoredSelLocs; ++i)
441     Writer.AddSourceLocation(SelLocs[i], Record);
442 
443   Code = serialization::DECL_OBJC_METHOD;
444 }
445 
446 void ASTDeclWriter::VisitObjCContainerDecl(ObjCContainerDecl *D) {
447   VisitNamedDecl(D);
448   Writer.AddSourceLocation(D->getAtStartLoc(), Record);
449   Writer.AddSourceRange(D->getAtEndRange(), Record);
450   // Abstract class (no need to define a stable serialization::DECL code).
451 }
452 
453 void ASTDeclWriter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *D) {
454   VisitRedeclarable(D);
455   VisitObjCContainerDecl(D);
456   Writer.AddTypeRef(QualType(D->getTypeForDecl(), 0), Record);
457 
458   ObjCInterfaceDecl *Def = D->getDefinition();
459   Writer.AddDeclRef(Def, Record);
460 
461   if (D == Def) {
462     // Write the DefinitionData
463     ObjCInterfaceDecl::DefinitionData &Data = D->data();
464 
465     Writer.AddDeclRef(D->getSuperClass(), Record);
466     Writer.AddSourceLocation(D->getSuperClassLoc(), Record);
467     Writer.AddSourceLocation(D->getEndOfDefinitionLoc(), Record);
468 
469     // Write out the protocols that are directly referenced by the @interface.
470     Record.push_back(Data.ReferencedProtocols.size());
471     for (ObjCInterfaceDecl::protocol_iterator P = D->protocol_begin(),
472                                            PEnd = D->protocol_end();
473          P != PEnd; ++P)
474       Writer.AddDeclRef(*P, Record);
475     for (ObjCInterfaceDecl::protocol_loc_iterator PL = D->protocol_loc_begin(),
476          PLEnd = D->protocol_loc_end();
477          PL != PLEnd; ++PL)
478       Writer.AddSourceLocation(*PL, Record);
479 
480     // Write out the protocols that are transitively referenced.
481     Record.push_back(Data.AllReferencedProtocols.size());
482     for (ObjCList<ObjCProtocolDecl>::iterator
483               P = Data.AllReferencedProtocols.begin(),
484            PEnd = Data.AllReferencedProtocols.end();
485          P != PEnd; ++P)
486       Writer.AddDeclRef(*P, Record);
487 
488     // Write out the ivars.
489     Record.push_back(D->ivar_size());
490     for (ObjCInterfaceDecl::ivar_iterator I = D->ivar_begin(),
491                                        IEnd = D->ivar_end(); I != IEnd; ++I)
492       Writer.AddDeclRef(*I, Record);
493 
494     Writer.AddDeclRef(D->getCategoryList(), Record);
495   }
496 
497   Code = serialization::DECL_OBJC_INTERFACE;
498 }
499 
500 void ASTDeclWriter::VisitObjCIvarDecl(ObjCIvarDecl *D) {
501   VisitFieldDecl(D);
502   // FIXME: stable encoding for @public/@private/@protected/@package
503   Record.push_back(D->getAccessControl());
504   Record.push_back(D->getSynthesize());
505 
506   if (!D->hasAttrs() &&
507       !D->isImplicit() &&
508       !D->isUsed(false) &&
509       !D->isInvalidDecl() &&
510       !D->isReferenced() &&
511       !D->isModulePrivate() &&
512       !D->getBitWidth() &&
513       !D->hasExtInfo() &&
514       D->getDeclName())
515     AbbrevToUse = Writer.getDeclObjCIvarAbbrev();
516 
517   Code = serialization::DECL_OBJC_IVAR;
518 }
519 
520 void ASTDeclWriter::VisitObjCProtocolDecl(ObjCProtocolDecl *D) {
521   VisitObjCContainerDecl(D);
522   Record.push_back(D->isInitiallyForwardDecl());
523   Record.push_back(D->isForwardDecl());
524   Writer.AddSourceLocation(D->getLocEnd(), Record);
525   Record.push_back(D->protocol_size());
526   for (ObjCProtocolDecl::protocol_iterator
527        I = D->protocol_begin(), IEnd = D->protocol_end(); I != IEnd; ++I)
528     Writer.AddDeclRef(*I, Record);
529   for (ObjCProtocolDecl::protocol_loc_iterator PL = D->protocol_loc_begin(),
530          PLEnd = D->protocol_loc_end();
531        PL != PLEnd; ++PL)
532     Writer.AddSourceLocation(*PL, Record);
533   Code = serialization::DECL_OBJC_PROTOCOL;
534 }
535 
536 void ASTDeclWriter::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D) {
537   VisitFieldDecl(D);
538   Code = serialization::DECL_OBJC_AT_DEFS_FIELD;
539 }
540 
541 void ASTDeclWriter::VisitObjCClassDecl(ObjCClassDecl *D) {
542   VisitDecl(D);
543   Writer.AddDeclRef(D->Interface, Record);
544   Writer.AddSourceLocation(D->InterfaceLoc, Record);
545   Code = serialization::DECL_OBJC_CLASS;
546 }
547 
548 void ASTDeclWriter::VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D) {
549   VisitDecl(D);
550   Record.push_back(D->protocol_size());
551   for (ObjCForwardProtocolDecl::protocol_iterator
552        I = D->protocol_begin(), IEnd = D->protocol_end(); I != IEnd; ++I)
553     Writer.AddDeclRef(*I, Record);
554   for (ObjCForwardProtocolDecl::protocol_loc_iterator
555          PL = D->protocol_loc_begin(), PLEnd = D->protocol_loc_end();
556        PL != PLEnd; ++PL)
557     Writer.AddSourceLocation(*PL, Record);
558   Code = serialization::DECL_OBJC_FORWARD_PROTOCOL;
559 }
560 
561 void ASTDeclWriter::VisitObjCCategoryDecl(ObjCCategoryDecl *D) {
562   VisitObjCContainerDecl(D);
563   Writer.AddDeclRef(D->getClassInterface(), Record);
564   Record.push_back(D->protocol_size());
565   for (ObjCCategoryDecl::protocol_iterator
566        I = D->protocol_begin(), IEnd = D->protocol_end(); I != IEnd; ++I)
567     Writer.AddDeclRef(*I, Record);
568   for (ObjCCategoryDecl::protocol_loc_iterator
569          PL = D->protocol_loc_begin(), PLEnd = D->protocol_loc_end();
570        PL != PLEnd; ++PL)
571     Writer.AddSourceLocation(*PL, Record);
572   Writer.AddDeclRef(D->getNextClassCategory(), Record);
573   Record.push_back(D->hasSynthBitfield());
574   Writer.AddSourceLocation(D->getCategoryNameLoc(), Record);
575   Code = serialization::DECL_OBJC_CATEGORY;
576 }
577 
578 void ASTDeclWriter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D) {
579   VisitNamedDecl(D);
580   Writer.AddDeclRef(D->getClassInterface(), Record);
581   Code = serialization::DECL_OBJC_COMPATIBLE_ALIAS;
582 }
583 
584 void ASTDeclWriter::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
585   VisitNamedDecl(D);
586   Writer.AddSourceLocation(D->getAtLoc(), Record);
587   Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
588   // FIXME: stable encoding
589   Record.push_back((unsigned)D->getPropertyAttributes());
590   Record.push_back((unsigned)D->getPropertyAttributesAsWritten());
591   // FIXME: stable encoding
592   Record.push_back((unsigned)D->getPropertyImplementation());
593   Writer.AddDeclarationName(D->getGetterName(), Record);
594   Writer.AddDeclarationName(D->getSetterName(), Record);
595   Writer.AddDeclRef(D->getGetterMethodDecl(), Record);
596   Writer.AddDeclRef(D->getSetterMethodDecl(), Record);
597   Writer.AddDeclRef(D->getPropertyIvarDecl(), Record);
598   Code = serialization::DECL_OBJC_PROPERTY;
599 }
600 
601 void ASTDeclWriter::VisitObjCImplDecl(ObjCImplDecl *D) {
602   VisitObjCContainerDecl(D);
603   Writer.AddDeclRef(D->getClassInterface(), Record);
604   // Abstract class (no need to define a stable serialization::DECL code).
605 }
606 
607 void ASTDeclWriter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
608   VisitObjCImplDecl(D);
609   Writer.AddIdentifierRef(D->getIdentifier(), Record);
610   Writer.AddSourceLocation(D->getCategoryNameLoc(), Record);
611   Code = serialization::DECL_OBJC_CATEGORY_IMPL;
612 }
613 
614 void ASTDeclWriter::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
615   VisitObjCImplDecl(D);
616   Writer.AddDeclRef(D->getSuperClass(), Record);
617   Writer.AddCXXCtorInitializers(D->IvarInitializers, D->NumIvarInitializers,
618                                 Record);
619   Record.push_back(D->hasSynthBitfield());
620   Code = serialization::DECL_OBJC_IMPLEMENTATION;
621 }
622 
623 void ASTDeclWriter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
624   VisitDecl(D);
625   Writer.AddSourceLocation(D->getLocStart(), Record);
626   Writer.AddDeclRef(D->getPropertyDecl(), Record);
627   Writer.AddDeclRef(D->getPropertyIvarDecl(), Record);
628   Writer.AddSourceLocation(D->getPropertyIvarDeclLoc(), Record);
629   Writer.AddStmt(D->getGetterCXXConstructor());
630   Writer.AddStmt(D->getSetterCXXAssignment());
631   Code = serialization::DECL_OBJC_PROPERTY_IMPL;
632 }
633 
634 void ASTDeclWriter::VisitFieldDecl(FieldDecl *D) {
635   VisitDeclaratorDecl(D);
636   Record.push_back(D->isMutable());
637   Record.push_back(D->getBitWidth()? 1 : D->hasInClassInitializer() ? 2 : 0);
638   if (D->getBitWidth())
639     Writer.AddStmt(D->getBitWidth());
640   else if (D->hasInClassInitializer())
641     Writer.AddStmt(D->getInClassInitializer());
642   if (!D->getDeclName())
643     Writer.AddDeclRef(Context.getInstantiatedFromUnnamedFieldDecl(D), Record);
644 
645   if (!D->hasAttrs() &&
646       !D->isImplicit() &&
647       !D->isUsed(false) &&
648       !D->isInvalidDecl() &&
649       !D->isReferenced() &&
650       !D->isTopLevelDeclInObjCContainer() &&
651       !D->isModulePrivate() &&
652       !D->getBitWidth() &&
653       !D->hasInClassInitializer() &&
654       !D->hasExtInfo() &&
655       !ObjCIvarDecl::classofKind(D->getKind()) &&
656       !ObjCAtDefsFieldDecl::classofKind(D->getKind()) &&
657       D->getDeclName())
658     AbbrevToUse = Writer.getDeclFieldAbbrev();
659 
660   Code = serialization::DECL_FIELD;
661 }
662 
663 void ASTDeclWriter::VisitIndirectFieldDecl(IndirectFieldDecl *D) {
664   VisitValueDecl(D);
665   Record.push_back(D->getChainingSize());
666 
667   for (IndirectFieldDecl::chain_iterator
668        P = D->chain_begin(),
669        PEnd = D->chain_end(); P != PEnd; ++P)
670     Writer.AddDeclRef(*P, Record);
671   Code = serialization::DECL_INDIRECTFIELD;
672 }
673 
674 void ASTDeclWriter::VisitVarDecl(VarDecl *D) {
675   VisitRedeclarable(D);
676   VisitDeclaratorDecl(D);
677   Record.push_back(D->getStorageClass()); // FIXME: stable encoding
678   Record.push_back(D->getStorageClassAsWritten());
679   Record.push_back(D->isThreadSpecified());
680   Record.push_back(D->hasCXXDirectInitializer());
681   Record.push_back(D->isExceptionVariable());
682   Record.push_back(D->isNRVOVariable());
683   Record.push_back(D->isCXXForRangeDecl());
684   Record.push_back(D->isARCPseudoStrong());
685   if (D->getInit()) {
686     Record.push_back(!D->isInitKnownICE() ? 1 : (D->isInitICE() ? 3 : 2));
687     Writer.AddStmt(D->getInit());
688   } else {
689     Record.push_back(0);
690   }
691 
692   MemberSpecializationInfo *SpecInfo
693     = D->isStaticDataMember() ? D->getMemberSpecializationInfo() : 0;
694   Record.push_back(SpecInfo != 0);
695   if (SpecInfo) {
696     Writer.AddDeclRef(SpecInfo->getInstantiatedFrom(), Record);
697     Record.push_back(SpecInfo->getTemplateSpecializationKind());
698     Writer.AddSourceLocation(SpecInfo->getPointOfInstantiation(), Record);
699   }
700 
701   if (!D->hasAttrs() &&
702       !D->isImplicit() &&
703       !D->isUsed(false) &&
704       !D->isInvalidDecl() &&
705       !D->isReferenced() &&
706       !D->isTopLevelDeclInObjCContainer() &&
707       D->getAccess() == AS_none &&
708       !D->isModulePrivate() &&
709       D->getDeclName().getNameKind() == DeclarationName::Identifier &&
710       !D->hasExtInfo() &&
711       !D->getPreviousDeclaration() &&
712       !D->hasCXXDirectInitializer() &&
713       D->getInit() == 0 &&
714       !isa<ParmVarDecl>(D) &&
715       !SpecInfo)
716     AbbrevToUse = Writer.getDeclVarAbbrev();
717 
718   Code = serialization::DECL_VAR;
719 }
720 
721 void ASTDeclWriter::VisitImplicitParamDecl(ImplicitParamDecl *D) {
722   VisitVarDecl(D);
723   Code = serialization::DECL_IMPLICIT_PARAM;
724 }
725 
726 void ASTDeclWriter::VisitParmVarDecl(ParmVarDecl *D) {
727   VisitVarDecl(D);
728   Record.push_back(D->isObjCMethodParameter());
729   Record.push_back(D->getFunctionScopeDepth());
730   Record.push_back(D->getFunctionScopeIndex());
731   Record.push_back(D->getObjCDeclQualifier()); // FIXME: stable encoding
732   Record.push_back(D->isKNRPromoted());
733   Record.push_back(D->hasInheritedDefaultArg());
734   Record.push_back(D->hasUninstantiatedDefaultArg());
735   if (D->hasUninstantiatedDefaultArg())
736     Writer.AddStmt(D->getUninstantiatedDefaultArg());
737   Code = serialization::DECL_PARM_VAR;
738 
739   assert(!D->isARCPseudoStrong()); // can be true of ImplicitParamDecl
740 
741   // If the assumptions about the DECL_PARM_VAR abbrev are true, use it.  Here
742   // we dynamically check for the properties that we optimize for, but don't
743   // know are true of all PARM_VAR_DECLs.
744   if (!D->hasAttrs() &&
745       !D->hasExtInfo() &&
746       !D->isImplicit() &&
747       !D->isUsed(false) &&
748       D->getAccess() == AS_none &&
749       !D->isModulePrivate() &&
750       D->getStorageClass() == 0 &&
751       !D->hasCXXDirectInitializer() && // Can params have this ever?
752       D->getFunctionScopeDepth() == 0 &&
753       D->getObjCDeclQualifier() == 0 &&
754       !D->isKNRPromoted() &&
755       !D->hasInheritedDefaultArg() &&
756       D->getInit() == 0 &&
757       !D->hasUninstantiatedDefaultArg())  // No default expr.
758     AbbrevToUse = Writer.getDeclParmVarAbbrev();
759 
760   // Check things we know are true of *every* PARM_VAR_DECL, which is more than
761   // just us assuming it.
762   assert(!D->isInvalidDecl() && "Shouldn't emit invalid decls");
763   assert(!D->isThreadSpecified() && "PARM_VAR_DECL can't be __thread");
764   assert(D->getAccess() == AS_none && "PARM_VAR_DECL can't be public/private");
765   assert(!D->isExceptionVariable() && "PARM_VAR_DECL can't be exception var");
766   assert(D->getPreviousDeclaration() == 0 && "PARM_VAR_DECL can't be redecl");
767   assert(!D->isStaticDataMember() &&
768          "PARM_VAR_DECL can't be static data member");
769 }
770 
771 void ASTDeclWriter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
772   VisitDecl(D);
773   Writer.AddStmt(D->getAsmString());
774   Writer.AddSourceLocation(D->getRParenLoc(), Record);
775   Code = serialization::DECL_FILE_SCOPE_ASM;
776 }
777 
778 void ASTDeclWriter::VisitBlockDecl(BlockDecl *D) {
779   VisitDecl(D);
780   Writer.AddStmt(D->getBody());
781   Writer.AddTypeSourceInfo(D->getSignatureAsWritten(), Record);
782   Record.push_back(D->param_size());
783   for (FunctionDecl::param_iterator P = D->param_begin(), PEnd = D->param_end();
784        P != PEnd; ++P)
785     Writer.AddDeclRef(*P, Record);
786   Record.push_back(D->capturesCXXThis());
787   Record.push_back(D->getNumCaptures());
788   for (BlockDecl::capture_iterator
789          i = D->capture_begin(), e = D->capture_end(); i != e; ++i) {
790     const BlockDecl::Capture &capture = *i;
791     Writer.AddDeclRef(capture.getVariable(), Record);
792 
793     unsigned flags = 0;
794     if (capture.isByRef()) flags |= 1;
795     if (capture.isNested()) flags |= 2;
796     if (capture.hasCopyExpr()) flags |= 4;
797     Record.push_back(flags);
798 
799     if (capture.hasCopyExpr()) Writer.AddStmt(capture.getCopyExpr());
800   }
801 
802   Code = serialization::DECL_BLOCK;
803 }
804 
805 void ASTDeclWriter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
806   VisitDecl(D);
807   Record.push_back(D->getLanguage());
808   Writer.AddSourceLocation(D->getExternLoc(), Record);
809   Writer.AddSourceLocation(D->getRBraceLoc(), Record);
810   Code = serialization::DECL_LINKAGE_SPEC;
811 }
812 
813 void ASTDeclWriter::VisitLabelDecl(LabelDecl *D) {
814   VisitNamedDecl(D);
815   Writer.AddSourceLocation(D->getLocStart(), Record);
816   Code = serialization::DECL_LABEL;
817 }
818 
819 
820 void ASTDeclWriter::VisitNamespaceDecl(NamespaceDecl *D) {
821   VisitNamedDecl(D);
822   Record.push_back(D->isInline());
823   Writer.AddSourceLocation(D->getLocStart(), Record);
824   Writer.AddSourceLocation(D->getRBraceLoc(), Record);
825   Writer.AddDeclRef(D->getNextNamespace(), Record);
826 
827   // Only write one reference--original or anonymous
828   Record.push_back(D->isOriginalNamespace());
829   if (D->isOriginalNamespace())
830     Writer.AddDeclRef(D->getAnonymousNamespace(), Record);
831   else
832     Writer.AddDeclRef(D->getOriginalNamespace(), Record);
833   Code = serialization::DECL_NAMESPACE;
834 
835   if (Writer.hasChain() && !D->isOriginalNamespace() &&
836       D->getOriginalNamespace()->isFromASTFile()) {
837     NamespaceDecl *NS = D->getOriginalNamespace();
838     Writer.AddUpdatedDeclContext(NS);
839 
840     // Make sure all visible decls are written. They will be recorded later.
841     NS->lookup(DeclarationName());
842     StoredDeclsMap *Map = static_cast<StoredDeclsMap*>(NS->getLookupPtr());
843     if (Map) {
844       for (StoredDeclsMap::iterator D = Map->begin(), DEnd = Map->end();
845            D != DEnd; ++D) {
846         DeclContext::lookup_result Result = D->second.getLookupResult();
847         while (Result.first != Result.second) {
848           Writer.GetDeclRef(*Result.first);
849           ++Result.first;
850         }
851       }
852     }
853   }
854 
855   if (Writer.hasChain() && D->isAnonymousNamespace() && !D->getNextNamespace()){
856     // This is a most recent reopening of the anonymous namespace. If its parent
857     // is in a previous PCH (or is the TU), mark that parent for update, because
858     // the original namespace always points to the latest re-opening of its
859     // anonymous namespace.
860     Decl *Parent = cast<Decl>(
861         D->getParent()->getRedeclContext()->getPrimaryContext());
862     if (Parent->isFromASTFile() || isa<TranslationUnitDecl>(Parent)) {
863       ASTWriter::UpdateRecord &Record = Writer.DeclUpdates[Parent];
864       Record.push_back(UPD_CXX_ADDED_ANONYMOUS_NAMESPACE);
865       Writer.AddDeclRef(D, Record);
866     }
867   }
868 }
869 
870 void ASTDeclWriter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
871   VisitNamedDecl(D);
872   Writer.AddSourceLocation(D->getNamespaceLoc(), Record);
873   Writer.AddSourceLocation(D->getTargetNameLoc(), Record);
874   Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
875   Writer.AddDeclRef(D->getNamespace(), Record);
876   Code = serialization::DECL_NAMESPACE_ALIAS;
877 }
878 
879 void ASTDeclWriter::VisitUsingDecl(UsingDecl *D) {
880   VisitNamedDecl(D);
881   Writer.AddSourceLocation(D->getUsingLocation(), Record);
882   Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
883   Writer.AddDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record);
884   Writer.AddDeclRef(D->FirstUsingShadow, Record);
885   Record.push_back(D->isTypeName());
886   Writer.AddDeclRef(Context.getInstantiatedFromUsingDecl(D), Record);
887   Code = serialization::DECL_USING;
888 }
889 
890 void ASTDeclWriter::VisitUsingShadowDecl(UsingShadowDecl *D) {
891   VisitNamedDecl(D);
892   Writer.AddDeclRef(D->getTargetDecl(), Record);
893   Writer.AddDeclRef(D->UsingOrNextShadow, Record);
894   Writer.AddDeclRef(Context.getInstantiatedFromUsingShadowDecl(D), Record);
895   Code = serialization::DECL_USING_SHADOW;
896 }
897 
898 void ASTDeclWriter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
899   VisitNamedDecl(D);
900   Writer.AddSourceLocation(D->getUsingLoc(), Record);
901   Writer.AddSourceLocation(D->getNamespaceKeyLocation(), Record);
902   Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
903   Writer.AddDeclRef(D->getNominatedNamespace(), Record);
904   Writer.AddDeclRef(dyn_cast<Decl>(D->getCommonAncestor()), Record);
905   Code = serialization::DECL_USING_DIRECTIVE;
906 }
907 
908 void ASTDeclWriter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
909   VisitValueDecl(D);
910   Writer.AddSourceLocation(D->getUsingLoc(), Record);
911   Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
912   Writer.AddDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record);
913   Code = serialization::DECL_UNRESOLVED_USING_VALUE;
914 }
915 
916 void ASTDeclWriter::VisitUnresolvedUsingTypenameDecl(
917                                                UnresolvedUsingTypenameDecl *D) {
918   VisitTypeDecl(D);
919   Writer.AddSourceLocation(D->getTypenameLoc(), Record);
920   Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
921   Code = serialization::DECL_UNRESOLVED_USING_TYPENAME;
922 }
923 
924 void ASTDeclWriter::VisitCXXRecordDecl(CXXRecordDecl *D) {
925   VisitRecordDecl(D);
926 
927   CXXRecordDecl *DefinitionDecl = 0;
928   if (D->DefinitionData)
929     DefinitionDecl = D->DefinitionData->Definition;
930   Writer.AddDeclRef(DefinitionDecl, Record);
931   if (D == DefinitionDecl)
932     Writer.AddCXXDefinitionData(D, Record);
933 
934   enum {
935     CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
936   };
937   if (ClassTemplateDecl *TemplD = D->getDescribedClassTemplate()) {
938     Record.push_back(CXXRecTemplate);
939     Writer.AddDeclRef(TemplD, Record);
940   } else if (MemberSpecializationInfo *MSInfo
941                = D->getMemberSpecializationInfo()) {
942     Record.push_back(CXXRecMemberSpecialization);
943     Writer.AddDeclRef(MSInfo->getInstantiatedFrom(), Record);
944     Record.push_back(MSInfo->getTemplateSpecializationKind());
945     Writer.AddSourceLocation(MSInfo->getPointOfInstantiation(), Record);
946   } else {
947     Record.push_back(CXXRecNotTemplate);
948   }
949 
950   // Store the key function to avoid deserializing every method so we can
951   // compute it.
952   if (D->IsCompleteDefinition)
953     Writer.AddDeclRef(Context.getKeyFunction(D), Record);
954 
955   Code = serialization::DECL_CXX_RECORD;
956 }
957 
958 void ASTDeclWriter::VisitCXXMethodDecl(CXXMethodDecl *D) {
959   VisitFunctionDecl(D);
960   Record.push_back(D->size_overridden_methods());
961   for (CXXMethodDecl::method_iterator
962          I = D->begin_overridden_methods(), E = D->end_overridden_methods();
963          I != E; ++I)
964     Writer.AddDeclRef(*I, Record);
965   Code = serialization::DECL_CXX_METHOD;
966 }
967 
968 void ASTDeclWriter::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
969   VisitCXXMethodDecl(D);
970 
971   Record.push_back(D->IsExplicitSpecified);
972   Record.push_back(D->ImplicitlyDefined);
973   Writer.AddCXXCtorInitializers(D->CtorInitializers, D->NumCtorInitializers,
974                                 Record);
975 
976   Code = serialization::DECL_CXX_CONSTRUCTOR;
977 }
978 
979 void ASTDeclWriter::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
980   VisitCXXMethodDecl(D);
981 
982   Record.push_back(D->ImplicitlyDefined);
983   Writer.AddDeclRef(D->OperatorDelete, Record);
984 
985   Code = serialization::DECL_CXX_DESTRUCTOR;
986 }
987 
988 void ASTDeclWriter::VisitCXXConversionDecl(CXXConversionDecl *D) {
989   VisitCXXMethodDecl(D);
990   Record.push_back(D->IsExplicitSpecified);
991   Code = serialization::DECL_CXX_CONVERSION;
992 }
993 
994 void ASTDeclWriter::VisitImportDecl(ImportDecl *D) {
995   VisitDecl(D);
996   ArrayRef<SourceLocation> IdentifierLocs = D->getIdentifierLocs();
997   Record.push_back(!IdentifierLocs.empty());
998   if (IdentifierLocs.empty()) {
999     Writer.AddSourceLocation(D->getLocEnd(), Record);
1000     Record.push_back(1);
1001   } else {
1002     for (unsigned I = 0, N = IdentifierLocs.size(); I != N; ++I)
1003       Writer.AddSourceLocation(IdentifierLocs[I], Record);
1004     Record.push_back(IdentifierLocs.size());
1005   }
1006   // Note: the number of source locations must always be the last element in
1007   // the record.
1008   Code = serialization::DECL_IMPORT;
1009 }
1010 
1011 void ASTDeclWriter::VisitAccessSpecDecl(AccessSpecDecl *D) {
1012   VisitDecl(D);
1013   Writer.AddSourceLocation(D->getColonLoc(), Record);
1014   Code = serialization::DECL_ACCESS_SPEC;
1015 }
1016 
1017 void ASTDeclWriter::VisitFriendDecl(FriendDecl *D) {
1018   VisitDecl(D);
1019   Record.push_back(D->Friend.is<TypeSourceInfo*>());
1020   if (D->Friend.is<TypeSourceInfo*>())
1021     Writer.AddTypeSourceInfo(D->Friend.get<TypeSourceInfo*>(), Record);
1022   else
1023     Writer.AddDeclRef(D->Friend.get<NamedDecl*>(), Record);
1024   Writer.AddDeclRef(D->getNextFriend(), Record);
1025   Record.push_back(D->UnsupportedFriend);
1026   Writer.AddSourceLocation(D->FriendLoc, Record);
1027   Code = serialization::DECL_FRIEND;
1028 }
1029 
1030 void ASTDeclWriter::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1031   VisitDecl(D);
1032   Record.push_back(D->getNumTemplateParameters());
1033   for (unsigned i = 0, e = D->getNumTemplateParameters(); i != e; ++i)
1034     Writer.AddTemplateParameterList(D->getTemplateParameterList(i), Record);
1035   Record.push_back(D->getFriendDecl() != 0);
1036   if (D->getFriendDecl())
1037     Writer.AddDeclRef(D->getFriendDecl(), Record);
1038   else
1039     Writer.AddTypeSourceInfo(D->getFriendType(), Record);
1040   Writer.AddSourceLocation(D->getFriendLoc(), Record);
1041   Code = serialization::DECL_FRIEND_TEMPLATE;
1042 }
1043 
1044 void ASTDeclWriter::VisitTemplateDecl(TemplateDecl *D) {
1045   VisitNamedDecl(D);
1046 
1047   Writer.AddDeclRef(D->getTemplatedDecl(), Record);
1048   Writer.AddTemplateParameterList(D->getTemplateParameters(), Record);
1049 }
1050 
1051 void ASTDeclWriter::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1052   // Emit data to initialize CommonOrPrev before VisitTemplateDecl so that
1053   // getCommonPtr() can be used while this is still initializing.
1054   enum { FirstDeclaration, FirstInFile, PointsToPrevious };
1055   RedeclarableTemplateDecl *Prev = D->getPreviousDeclaration();
1056   RedeclarableTemplateDecl *First = 0;
1057   if (!Prev) {
1058     Record.push_back(FirstDeclaration);
1059 
1060     // This declaration owns the 'common' pointer, so serialize that data now.
1061     Writer.AddDeclRef(D->getInstantiatedFromMemberTemplate(), Record);
1062     if (D->getInstantiatedFromMemberTemplate())
1063       Record.push_back(D->isMemberSpecialization());
1064   } else {
1065     First = D->getFirstDeclaration();
1066     Record.push_back(Prev->isFromASTFile()? FirstInFile : PointsToPrevious);
1067     Writer.AddDeclRef(First, Record);
1068     Writer.AddDeclRef(Prev, Record);
1069   }
1070 
1071   if (D->getMostRecentDeclaration() != D && (!Prev || Prev->isFromASTFile())) {
1072     if (!First)
1073       First = D->getFirstDeclaration();
1074 
1075     // Capture the set of redeclarations in this file.
1076     LocalRedeclarationsInfo LocalInfo = {
1077       Writer.GetDeclRef(First),
1078       Writer.GetDeclRef(D),
1079       Writer.GetDeclRef(D->getMostRecentDeclaration())
1080     };
1081     Writer.LocalRedeclarations.push_back(LocalInfo);
1082   }
1083 
1084   VisitTemplateDecl(D);
1085   Record.push_back(D->getIdentifierNamespace());
1086 }
1087 
1088 void ASTDeclWriter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1089   VisitRedeclarableTemplateDecl(D);
1090 
1091   if (D->getPreviousDeclaration() == 0) {
1092     typedef llvm::FoldingSet<ClassTemplateSpecializationDecl> CTSDSetTy;
1093     CTSDSetTy &CTSDSet = D->getSpecializations();
1094     Record.push_back(CTSDSet.size());
1095     for (CTSDSetTy::iterator I=CTSDSet.begin(), E = CTSDSet.end(); I!=E; ++I) {
1096       assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
1097       Writer.AddDeclRef(&*I, Record);
1098     }
1099 
1100     typedef llvm::FoldingSet<ClassTemplatePartialSpecializationDecl> CTPSDSetTy;
1101     CTPSDSetTy &CTPSDSet = D->getPartialSpecializations();
1102     Record.push_back(CTPSDSet.size());
1103     for (CTPSDSetTy::iterator I=CTPSDSet.begin(), E=CTPSDSet.end(); I!=E; ++I) {
1104       assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
1105       Writer.AddDeclRef(&*I, Record);
1106     }
1107 
1108     // InjectedClassNameType is computed, no need to write it.
1109   }
1110   Code = serialization::DECL_CLASS_TEMPLATE;
1111 }
1112 
1113 void ASTDeclWriter::VisitClassTemplateSpecializationDecl(
1114                                            ClassTemplateSpecializationDecl *D) {
1115   VisitCXXRecordDecl(D);
1116 
1117   llvm::PointerUnion<ClassTemplateDecl *,
1118                      ClassTemplatePartialSpecializationDecl *> InstFrom
1119     = D->getSpecializedTemplateOrPartial();
1120   if (Decl *InstFromD = InstFrom.dyn_cast<ClassTemplateDecl *>()) {
1121     Writer.AddDeclRef(InstFromD, Record);
1122   } else {
1123     Writer.AddDeclRef(InstFrom.get<ClassTemplatePartialSpecializationDecl *>(),
1124                       Record);
1125     Writer.AddTemplateArgumentList(&D->getTemplateInstantiationArgs(), Record);
1126   }
1127 
1128   // Explicit info.
1129   Writer.AddTypeSourceInfo(D->getTypeAsWritten(), Record);
1130   if (D->getTypeAsWritten()) {
1131     Writer.AddSourceLocation(D->getExternLoc(), Record);
1132     Writer.AddSourceLocation(D->getTemplateKeywordLoc(), Record);
1133   }
1134 
1135   Writer.AddTemplateArgumentList(&D->getTemplateArgs(), Record);
1136   Writer.AddSourceLocation(D->getPointOfInstantiation(), Record);
1137   Record.push_back(D->getSpecializationKind());
1138 
1139   if (D->isCanonicalDecl()) {
1140     // When reading, we'll add it to the folding set of the following template.
1141     Writer.AddDeclRef(D->getSpecializedTemplate()->getCanonicalDecl(), Record);
1142   }
1143 
1144   Code = serialization::DECL_CLASS_TEMPLATE_SPECIALIZATION;
1145 }
1146 
1147 void ASTDeclWriter::VisitClassTemplatePartialSpecializationDecl(
1148                                     ClassTemplatePartialSpecializationDecl *D) {
1149   VisitClassTemplateSpecializationDecl(D);
1150 
1151   Writer.AddTemplateParameterList(D->getTemplateParameters(), Record);
1152 
1153   Record.push_back(D->getNumTemplateArgsAsWritten());
1154   for (int i = 0, e = D->getNumTemplateArgsAsWritten(); i != e; ++i)
1155     Writer.AddTemplateArgumentLoc(D->getTemplateArgsAsWritten()[i], Record);
1156 
1157   Record.push_back(D->getSequenceNumber());
1158 
1159   // These are read/set from/to the first declaration.
1160   if (D->getPreviousDeclaration() == 0) {
1161     Writer.AddDeclRef(D->getInstantiatedFromMember(), Record);
1162     Record.push_back(D->isMemberSpecialization());
1163   }
1164 
1165   Code = serialization::DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION;
1166 }
1167 
1168 void ASTDeclWriter::VisitClassScopeFunctionSpecializationDecl(
1169                                     ClassScopeFunctionSpecializationDecl *D) {
1170   VisitDecl(D);
1171   Writer.AddDeclRef(D->getSpecialization(), Record);
1172   Code = serialization::DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION;
1173 }
1174 
1175 
1176 void ASTDeclWriter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1177   VisitRedeclarableTemplateDecl(D);
1178 
1179   if (D->getPreviousDeclaration() == 0) {
1180     // This FunctionTemplateDecl owns the CommonPtr; write it.
1181 
1182     // Write the function specialization declarations.
1183     Record.push_back(D->getSpecializations().size());
1184     for (llvm::FoldingSet<FunctionTemplateSpecializationInfo>::iterator
1185            I = D->getSpecializations().begin(),
1186            E = D->getSpecializations().end()   ; I != E; ++I) {
1187       assert(I->Function->isCanonicalDecl() &&
1188              "Expected only canonical decls in set");
1189       Writer.AddDeclRef(I->Function, Record);
1190     }
1191   }
1192   Code = serialization::DECL_FUNCTION_TEMPLATE;
1193 }
1194 
1195 void ASTDeclWriter::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
1196   VisitTypeDecl(D);
1197 
1198   Record.push_back(D->wasDeclaredWithTypename());
1199   Record.push_back(D->defaultArgumentWasInherited());
1200   Writer.AddTypeSourceInfo(D->getDefaultArgumentInfo(), Record);
1201 
1202   Code = serialization::DECL_TEMPLATE_TYPE_PARM;
1203 }
1204 
1205 void ASTDeclWriter::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
1206   // For an expanded parameter pack, record the number of expansion types here
1207   // so that it's easier for
1208   if (D->isExpandedParameterPack())
1209     Record.push_back(D->getNumExpansionTypes());
1210 
1211   VisitDeclaratorDecl(D);
1212   // TemplateParmPosition.
1213   Record.push_back(D->getDepth());
1214   Record.push_back(D->getPosition());
1215 
1216   if (D->isExpandedParameterPack()) {
1217     for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
1218       Writer.AddTypeRef(D->getExpansionType(I), Record);
1219       Writer.AddTypeSourceInfo(D->getExpansionTypeSourceInfo(I), Record);
1220     }
1221 
1222     Code = serialization::DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK;
1223   } else {
1224     // Rest of NonTypeTemplateParmDecl.
1225     Record.push_back(D->isParameterPack());
1226     Record.push_back(D->getDefaultArgument() != 0);
1227     if (D->getDefaultArgument()) {
1228       Writer.AddStmt(D->getDefaultArgument());
1229       Record.push_back(D->defaultArgumentWasInherited());
1230     }
1231     Code = serialization::DECL_NON_TYPE_TEMPLATE_PARM;
1232   }
1233 }
1234 
1235 void ASTDeclWriter::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
1236   VisitTemplateDecl(D);
1237   // TemplateParmPosition.
1238   Record.push_back(D->getDepth());
1239   Record.push_back(D->getPosition());
1240   // Rest of TemplateTemplateParmDecl.
1241   Writer.AddTemplateArgumentLoc(D->getDefaultArgument(), Record);
1242   Record.push_back(D->defaultArgumentWasInherited());
1243   Record.push_back(D->isParameterPack());
1244   Code = serialization::DECL_TEMPLATE_TEMPLATE_PARM;
1245 }
1246 
1247 void ASTDeclWriter::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
1248   VisitRedeclarableTemplateDecl(D);
1249   Code = serialization::DECL_TYPE_ALIAS_TEMPLATE;
1250 }
1251 
1252 void ASTDeclWriter::VisitStaticAssertDecl(StaticAssertDecl *D) {
1253   VisitDecl(D);
1254   Writer.AddStmt(D->getAssertExpr());
1255   Writer.AddStmt(D->getMessage());
1256   Writer.AddSourceLocation(D->getRParenLoc(), Record);
1257   Code = serialization::DECL_STATIC_ASSERT;
1258 }
1259 
1260 /// \brief Emit the DeclContext part of a declaration context decl.
1261 ///
1262 /// \param LexicalOffset the offset at which the DECL_CONTEXT_LEXICAL
1263 /// block for this declaration context is stored. May be 0 to indicate
1264 /// that there are no declarations stored within this context.
1265 ///
1266 /// \param VisibleOffset the offset at which the DECL_CONTEXT_VISIBLE
1267 /// block for this declaration context is stored. May be 0 to indicate
1268 /// that there are no declarations visible from this context. Note
1269 /// that this value will not be emitted for non-primary declaration
1270 /// contexts.
1271 void ASTDeclWriter::VisitDeclContext(DeclContext *DC, uint64_t LexicalOffset,
1272                                      uint64_t VisibleOffset) {
1273   Record.push_back(LexicalOffset);
1274   Record.push_back(VisibleOffset);
1275 }
1276 
1277 template <typename T>
1278 void ASTDeclWriter::VisitRedeclarable(Redeclarable<T> *D) {
1279   enum { FirstDeclaration = 0, FirstInFile, PointsToPrevious };
1280   T *Prev = D->getPreviousDeclaration();
1281   T *First = D->getFirstDeclaration();
1282 
1283   if (!Prev) {
1284     Record.push_back(FirstDeclaration);
1285   } else {
1286     Record.push_back(Prev->isFromASTFile()? FirstInFile : PointsToPrevious);
1287     Writer.AddDeclRef(First, Record);
1288     Writer.AddDeclRef(D->getPreviousDeclaration(), Record);
1289   }
1290 
1291   if (D->RedeclLink.getPointer() != D && (!Prev || Prev->isFromASTFile())) {
1292     // Capture the set of redeclarations in this file.
1293     LocalRedeclarationsInfo LocalInfo = {
1294       Writer.GetDeclRef(First),
1295       Writer.GetDeclRef(static_cast<T*>(D)),
1296       Writer.GetDeclRef(D->getMostRecentDeclaration())
1297     };
1298     Writer.LocalRedeclarations.push_back(LocalInfo);
1299   }
1300 }
1301 
1302 //===----------------------------------------------------------------------===//
1303 // ASTWriter Implementation
1304 //===----------------------------------------------------------------------===//
1305 
1306 void ASTWriter::WriteDeclsBlockAbbrevs() {
1307   using namespace llvm;
1308 
1309   BitCodeAbbrev *Abv;
1310 
1311   // Abbreviation for DECL_FIELD
1312   Abv = new BitCodeAbbrev();
1313   Abv->Add(BitCodeAbbrevOp(serialization::DECL_FIELD));
1314   // Decl
1315   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1316   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1317   Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1318   Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1319   Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1320   Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1321   Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1322   Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1323   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2));  // AccessSpecifier
1324   Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1325   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1326   // NamedDecl
1327   Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1328   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1329   // ValueDecl
1330   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1331   // DeclaratorDecl
1332   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1333   Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1334   // FieldDecl
1335   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
1336   Abv->Add(BitCodeAbbrevOp(0));                       //getBitWidth
1337   // Type Source Info
1338   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1339   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1340   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1341   DeclFieldAbbrev = Stream.EmitAbbrev(Abv);
1342 
1343   // Abbreviation for DECL_OBJC_IVAR
1344   Abv = new BitCodeAbbrev();
1345   Abv->Add(BitCodeAbbrevOp(serialization::DECL_OBJC_IVAR));
1346   // Decl
1347   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1348   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1349   Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1350   Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1351   Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1352   Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1353   Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1354   Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1355   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2));  // AccessSpecifier
1356   Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1357   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1358   // NamedDecl
1359   Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1360   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1361   // ValueDecl
1362   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1363   // DeclaratorDecl
1364   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1365   Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1366   // FieldDecl
1367   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
1368   Abv->Add(BitCodeAbbrevOp(0));                       //getBitWidth
1369   // ObjC Ivar
1370   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getAccessControl
1371   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getSynthesize
1372   // Type Source Info
1373   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1374   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1375   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1376   DeclObjCIvarAbbrev = Stream.EmitAbbrev(Abv);
1377 
1378   // Abbreviation for DECL_ENUM
1379   Abv = new BitCodeAbbrev();
1380   Abv->Add(BitCodeAbbrevOp(serialization::DECL_ENUM));
1381   // Redeclarable
1382   Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1383   // Decl
1384   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1385   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1386   Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1387   Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1388   Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1389   Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1390   Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1391   Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1392   Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1393   Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1394   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1395   // NamedDecl
1396   Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1397   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1398   // TypeDecl
1399   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1400   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1401   // TagDecl
1402   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IdentifierNamespace
1403   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getTagKind
1404   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCompleteDefinition
1405   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // EmbeddedInDeclarator
1406   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFreeStanding
1407   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // SourceLocation
1408   Abv->Add(BitCodeAbbrevOp(0));                         // hasExtInfo
1409   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // TypedefNameAnonDecl
1410   // EnumDecl
1411   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // AddTypeRef
1412   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IntegerType
1413   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getPromotionType
1414   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getNumPositiveBits
1415   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getNumNegativeBits
1416   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isScoped
1417   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isScopedUsingClassTag
1418   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isFixed
1419   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // InstantiatedMembEnum
1420   // DC
1421   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // LexicalOffset
1422   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // VisibleOffset
1423   DeclEnumAbbrev = Stream.EmitAbbrev(Abv);
1424 
1425   // Abbreviation for DECL_RECORD
1426   Abv = new BitCodeAbbrev();
1427   Abv->Add(BitCodeAbbrevOp(serialization::DECL_RECORD));
1428   // Redeclarable
1429   Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1430   // Decl
1431   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1432   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1433   Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1434   Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1435   Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1436   Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1437   Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1438   Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1439   Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1440   Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1441   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1442   // NamedDecl
1443   Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1444   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1445   // TypeDecl
1446   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1447   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1448   // TagDecl
1449   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IdentifierNamespace
1450   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getTagKind
1451   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCompleteDefinition
1452   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // EmbeddedInDeclarator
1453   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFreeStanding
1454   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // SourceLocation
1455   Abv->Add(BitCodeAbbrevOp(0));                         // hasExtInfo
1456   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // TypedefNameAnonDecl
1457   // RecordDecl
1458   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // FlexibleArrayMember
1459   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // AnonymousStructUnion
1460   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // hasObjectMember
1461   // DC
1462   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // LexicalOffset
1463   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // VisibleOffset
1464   DeclRecordAbbrev = Stream.EmitAbbrev(Abv);
1465 
1466   // Abbreviation for DECL_PARM_VAR
1467   Abv = new BitCodeAbbrev();
1468   Abv->Add(BitCodeAbbrevOp(serialization::DECL_PARM_VAR));
1469   // Redeclarable
1470   Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1471   // Decl
1472   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1473   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1474   Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1475   Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1476   Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1477   Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1478   Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1479   Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1480   Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1481   Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1482   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1483   // NamedDecl
1484   Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1485   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1486   // ValueDecl
1487   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1488   // DeclaratorDecl
1489   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1490   Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1491   // VarDecl
1492   Abv->Add(BitCodeAbbrevOp(0));                       // StorageClass
1493   Abv->Add(BitCodeAbbrevOp(0));                       // StorageClassAsWritten
1494   Abv->Add(BitCodeAbbrevOp(0));                       // isThreadSpecified
1495   Abv->Add(BitCodeAbbrevOp(0));                       // hasCXXDirectInitializer
1496   Abv->Add(BitCodeAbbrevOp(0));                       // isExceptionVariable
1497   Abv->Add(BitCodeAbbrevOp(0));                       // isNRVOVariable
1498   Abv->Add(BitCodeAbbrevOp(0));                       // isCXXForRangeDecl
1499   Abv->Add(BitCodeAbbrevOp(0));                       // isARCPseudoStrong
1500   Abv->Add(BitCodeAbbrevOp(0));                       // HasInit
1501   Abv->Add(BitCodeAbbrevOp(0));                   // HasMemberSpecializationInfo
1502   // ParmVarDecl
1503   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsObjCMethodParameter
1504   Abv->Add(BitCodeAbbrevOp(0));                       // ScopeDepth
1505   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ScopeIndex
1506   Abv->Add(BitCodeAbbrevOp(0));                       // ObjCDeclQualifier
1507   Abv->Add(BitCodeAbbrevOp(0));                       // KNRPromoted
1508   Abv->Add(BitCodeAbbrevOp(0));                       // HasInheritedDefaultArg
1509   Abv->Add(BitCodeAbbrevOp(0));                   // HasUninstantiatedDefaultArg
1510   // Type Source Info
1511   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1512   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1513   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1514   DeclParmVarAbbrev = Stream.EmitAbbrev(Abv);
1515 
1516   // Abbreviation for DECL_TYPEDEF
1517   Abv = new BitCodeAbbrev();
1518   Abv->Add(BitCodeAbbrevOp(serialization::DECL_TYPEDEF));
1519   // Redeclarable
1520   Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1521   // Decl
1522   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1523   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1524   Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1525   Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1526   Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1527   Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1528   Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1529   Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1530   Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1531   Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1532   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1533   // NamedDecl
1534   Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1535   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1536   // TypeDecl
1537   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1538   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1539   // TypedefDecl
1540   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1541   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1542   DeclTypedefAbbrev = Stream.EmitAbbrev(Abv);
1543 
1544   // Abbreviation for DECL_VAR
1545   Abv = new BitCodeAbbrev();
1546   Abv->Add(BitCodeAbbrevOp(serialization::DECL_VAR));
1547   // Redeclarable
1548   Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1549   // Decl
1550   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1551   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1552   Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1553   Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1554   Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1555   Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1556   Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1557   Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1558   Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1559   Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1560   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1561   // NamedDecl
1562   Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1563   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1564   // ValueDecl
1565   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1566   // DeclaratorDecl
1567   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1568   Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1569   // VarDecl
1570   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // StorageClass
1571   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // StorageClassAsWritten
1572   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isThreadSpecified
1573   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // CXXDirectInitializer
1574   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isExceptionVariable
1575   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isNRVOVariable
1576   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCXXForRangeDecl
1577   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isARCPseudoStrong
1578   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // HasInit
1579   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // HasMemberSpecInfo
1580   // Type Source Info
1581   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1582   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1583   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1584   DeclVarAbbrev = Stream.EmitAbbrev(Abv);
1585 
1586   // Abbreviation for EXPR_DECL_REF
1587   Abv = new BitCodeAbbrev();
1588   Abv->Add(BitCodeAbbrevOp(serialization::EXPR_DECL_REF));
1589   //Stmt
1590   //Expr
1591   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1592   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1593   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1594   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1595   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1596   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1597   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1598   //DeclRefExpr
1599   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //HasQualifier
1600   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //GetDeclFound
1601   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ExplicitTemplateArgs
1602   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //HadMultipleCandidates
1603   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclRef
1604   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1605   DeclRefExprAbbrev = Stream.EmitAbbrev(Abv);
1606 
1607   // Abbreviation for EXPR_INTEGER_LITERAL
1608   Abv = new BitCodeAbbrev();
1609   Abv->Add(BitCodeAbbrevOp(serialization::EXPR_INTEGER_LITERAL));
1610   //Stmt
1611   //Expr
1612   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1613   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1614   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1615   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1616   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1617   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1618   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1619   //Integer Literal
1620   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1621   Abv->Add(BitCodeAbbrevOp(32));                      // Bit Width
1622   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Value
1623   IntegerLiteralAbbrev = Stream.EmitAbbrev(Abv);
1624 
1625   // Abbreviation for EXPR_CHARACTER_LITERAL
1626   Abv = new BitCodeAbbrev();
1627   Abv->Add(BitCodeAbbrevOp(serialization::EXPR_CHARACTER_LITERAL));
1628   //Stmt
1629   //Expr
1630   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1631   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1632   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1633   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1634   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1635   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1636   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1637   //Character Literal
1638   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getValue
1639   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1640   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //IsWide
1641   CharacterLiteralAbbrev = Stream.EmitAbbrev(Abv);
1642 
1643   Abv = new BitCodeAbbrev();
1644   Abv->Add(BitCodeAbbrevOp(serialization::DECL_CONTEXT_LEXICAL));
1645   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
1646   DeclContextLexicalAbbrev = Stream.EmitAbbrev(Abv);
1647 
1648   Abv = new BitCodeAbbrev();
1649   Abv->Add(BitCodeAbbrevOp(serialization::DECL_CONTEXT_VISIBLE));
1650   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
1651   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
1652   DeclContextVisibleLookupAbbrev = Stream.EmitAbbrev(Abv);
1653 }
1654 
1655 /// isRequiredDecl - Check if this is a "required" Decl, which must be seen by
1656 /// consumers of the AST.
1657 ///
1658 /// Such decls will always be deserialized from the AST file, so we would like
1659 /// this to be as restrictive as possible. Currently the predicate is driven by
1660 /// code generation requirements, if other clients have a different notion of
1661 /// what is "required" then we may have to consider an alternate scheme where
1662 /// clients can iterate over the top-level decls and get information on them,
1663 /// without necessary deserializing them. We could explicitly require such
1664 /// clients to use a separate API call to "realize" the decl. This should be
1665 /// relatively painless since they would presumably only do it for top-level
1666 /// decls.
1667 static bool isRequiredDecl(const Decl *D, ASTContext &Context) {
1668   // An ObjCMethodDecl is never considered as "required" because its
1669   // implementation container always is.
1670 
1671   // File scoped assembly or obj-c implementation must be seen.
1672   if (isa<FileScopeAsmDecl>(D) || isa<ObjCImplDecl>(D))
1673     return true;
1674 
1675   return Context.DeclMustBeEmitted(D);
1676 }
1677 
1678 void ASTWriter::WriteDecl(ASTContext &Context, Decl *D) {
1679   // Switch case IDs are per Decl.
1680   ClearSwitchCaseIDs();
1681 
1682   RecordData Record;
1683   ASTDeclWriter W(*this, Context, Record);
1684 
1685   // If this declaration is also a DeclContext, write blocks for the
1686   // declarations that lexically stored inside its context and those
1687   // declarations that are visible from its context. These blocks
1688   // are written before the declaration itself so that we can put
1689   // their offsets into the record for the declaration.
1690   uint64_t LexicalOffset = 0;
1691   uint64_t VisibleOffset = 0;
1692   DeclContext *DC = dyn_cast<DeclContext>(D);
1693   if (DC) {
1694     LexicalOffset = WriteDeclContextLexicalBlock(Context, DC);
1695     VisibleOffset = WriteDeclContextVisibleBlock(Context, DC);
1696   }
1697 
1698   // Determine the ID for this declaration
1699   serialization::DeclID &IDR = DeclIDs[D];
1700   if (IDR == 0)
1701     IDR = NextDeclID++;
1702   serialization::DeclID ID = IDR;
1703 
1704   if (ID < FirstDeclID) {
1705     // We're replacing a decl in a previous file.
1706     ReplacedDecls.push_back(ReplacedDeclInfo(ID, Stream.GetCurrentBitNo(),
1707                                              D->getLocation()));
1708   } else {
1709     unsigned Index = ID - FirstDeclID;
1710 
1711     // Record the offset for this declaration
1712     SourceLocation Loc = D->getLocation();
1713     if (DeclOffsets.size() == Index)
1714       DeclOffsets.push_back(DeclOffset(Loc, Stream.GetCurrentBitNo()));
1715     else if (DeclOffsets.size() < Index) {
1716       DeclOffsets.resize(Index+1);
1717       DeclOffsets[Index].setLocation(Loc);
1718       DeclOffsets[Index].BitOffset = Stream.GetCurrentBitNo();
1719     }
1720 
1721     SourceManager &SM = Context.getSourceManager();
1722     if (Loc.isValid() && SM.isLocalSourceLocation(Loc))
1723       associateDeclWithFile(D, ID);
1724   }
1725 
1726   // Build and emit a record for this declaration
1727   Record.clear();
1728   W.Code = (serialization::DeclCode)0;
1729   W.AbbrevToUse = 0;
1730   W.Visit(D);
1731   if (DC) W.VisitDeclContext(DC, LexicalOffset, VisibleOffset);
1732 
1733   if (!W.Code)
1734     llvm::report_fatal_error(StringRef("unexpected declaration kind '") +
1735                             D->getDeclKindName() + "'");
1736   Stream.EmitRecord(W.Code, Record, W.AbbrevToUse);
1737 
1738   // Flush any expressions that were written as part of this declaration.
1739   FlushStmts();
1740 
1741   // Flush C++ base specifiers, if there are any.
1742   FlushCXXBaseSpecifiers();
1743 
1744   // Note "external" declarations so that we can add them to a record in the
1745   // AST file later.
1746   //
1747   // FIXME: This should be renamed, the predicate is much more complicated.
1748   if (isRequiredDecl(D, Context))
1749     ExternalDefinitions.push_back(ID);
1750 }
1751