ASTWriterDecl.cpp revision d329724745b49f894b768d47275b7c2713106e89 
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/DeclCXX.h"
17#include "clang/AST/DeclContextInternals.h"
18#include "clang/AST/DeclTemplate.h"
19#include "clang/AST/DeclVisitor.h"
20#include "clang/AST/Expr.h"
21#include "clang/Basic/SourceManager.h"
22#include "clang/Serialization/ASTReader.h"
23#include "llvm/ADT/Twine.h"
24#include "llvm/Bitcode/BitstreamWriter.h"
25#include "llvm/Support/ErrorHandling.h"
26using namespace clang;
27using namespace serialization;
28
29//===----------------------------------------------------------------------===//
30// Declaration serialization
31//===----------------------------------------------------------------------===//
32
33namespace clang {
34  class ASTDeclWriter : public DeclVisitor<ASTDeclWriter, void> {
35
36    ASTWriter &Writer;
37    ASTContext &Context;
38    typedef ASTWriter::RecordData RecordData;
39    RecordData &Record;
40
41  public:
42    serialization::DeclCode Code;
43    unsigned AbbrevToUse;
44
45    ASTDeclWriter(ASTWriter &Writer, ASTContext &Context, RecordData &Record)
46      : Writer(Writer), Context(Context), Record(Record) {
47    }
48
49    void Visit(Decl *D);
50
51    void VisitDecl(Decl *D);
52    void VisitTranslationUnitDecl(TranslationUnitDecl *D);
53    void VisitNamedDecl(NamedDecl *D);
54    void VisitLabelDecl(LabelDecl *LD);
55    void VisitNamespaceDecl(NamespaceDecl *D);
56    void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
57    void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
58    void VisitTypeDecl(TypeDecl *D);
59    void VisitTypedefNameDecl(TypedefNameDecl *D);
60    void VisitTypedefDecl(TypedefDecl *D);
61    void VisitTypeAliasDecl(TypeAliasDecl *D);
62    void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
63    void VisitTagDecl(TagDecl *D);
64    void VisitEnumDecl(EnumDecl *D);
65    void VisitRecordDecl(RecordDecl *D);
66    void VisitCXXRecordDecl(CXXRecordDecl *D);
67    void VisitClassTemplateSpecializationDecl(
68                                            ClassTemplateSpecializationDecl *D);
69    void VisitClassTemplatePartialSpecializationDecl(
70                                     ClassTemplatePartialSpecializationDecl *D);
71    void VisitClassScopeFunctionSpecializationDecl(
72                                       ClassScopeFunctionSpecializationDecl *D);
73    void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
74    void VisitValueDecl(ValueDecl *D);
75    void VisitEnumConstantDecl(EnumConstantDecl *D);
76    void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
77    void VisitDeclaratorDecl(DeclaratorDecl *D);
78    void VisitFunctionDecl(FunctionDecl *D);
79    void VisitCXXMethodDecl(CXXMethodDecl *D);
80    void VisitCXXConstructorDecl(CXXConstructorDecl *D);
81    void VisitCXXDestructorDecl(CXXDestructorDecl *D);
82    void VisitCXXConversionDecl(CXXConversionDecl *D);
83    void VisitFieldDecl(FieldDecl *D);
84    void VisitIndirectFieldDecl(IndirectFieldDecl *D);
85    void VisitVarDecl(VarDecl *D);
86    void VisitImplicitParamDecl(ImplicitParamDecl *D);
87    void VisitParmVarDecl(ParmVarDecl *D);
88    void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
89    void VisitTemplateDecl(TemplateDecl *D);
90    void VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
91    void VisitClassTemplateDecl(ClassTemplateDecl *D);
92    void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
93    void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
94    void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
95    void VisitUsingDecl(UsingDecl *D);
96    void VisitUsingShadowDecl(UsingShadowDecl *D);
97    void VisitLinkageSpecDecl(LinkageSpecDecl *D);
98    void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
99    void VisitImportDecl(ImportDecl *D);
100    void VisitAccessSpecDecl(AccessSpecDecl *D);
101    void VisitFriendDecl(FriendDecl *D);
102    void VisitFriendTemplateDecl(FriendTemplateDecl *D);
103    void VisitStaticAssertDecl(StaticAssertDecl *D);
104    void VisitBlockDecl(BlockDecl *D);
105
106    void VisitDeclContext(DeclContext *DC, uint64_t LexicalOffset,
107                          uint64_t VisibleOffset);
108    template <typename T> void VisitRedeclarable(Redeclarable<T> *D);
109
110
111    // FIXME: Put in the same order is DeclNodes.td?
112    void VisitObjCMethodDecl(ObjCMethodDecl *D);
113    void VisitObjCContainerDecl(ObjCContainerDecl *D);
114    void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
115    void VisitObjCIvarDecl(ObjCIvarDecl *D);
116    void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
117    void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
118    void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
119    void VisitObjCImplDecl(ObjCImplDecl *D);
120    void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
121    void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
122    void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
123    void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
124    void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
125  };
126}
127
128void ASTDeclWriter::Visit(Decl *D) {
129  DeclVisitor<ASTDeclWriter>::Visit(D);
130
131  // Source locations require array (variable-length) abbreviations.  The
132  // abbreviation infrastructure requires that arrays are encoded last, so
133  // we handle it here in the case of those classes derived from DeclaratorDecl
134  if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)){
135    Writer.AddTypeSourceInfo(DD->getTypeSourceInfo(), Record);
136  }
137
138  // Handle FunctionDecl's body here and write it after all other Stmts/Exprs
139  // have been written. We want it last because we will not read it back when
140  // retrieving it from the AST, we'll just lazily set the offset.
141  if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
142    Record.push_back(FD->doesThisDeclarationHaveABody());
143    if (FD->doesThisDeclarationHaveABody())
144      Writer.AddStmt(FD->getBody());
145  }
146}
147
148void ASTDeclWriter::VisitDecl(Decl *D) {
149  Writer.AddDeclRef(cast_or_null<Decl>(D->getDeclContext()), Record);
150  Writer.AddDeclRef(cast_or_null<Decl>(D->getLexicalDeclContext()), Record);
151  Record.push_back(D->isInvalidDecl());
152  Record.push_back(D->hasAttrs());
153  if (D->hasAttrs())
154    Writer.WriteAttributes(ArrayRef<const Attr*>(D->getAttrs().begin(),
155                                                 D->getAttrs().size()), 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->isTopLevelDeclInObjCContainer());
160  Record.push_back(D->getAccess());
161  Record.push_back(D->isModulePrivate());
162  Record.push_back(Writer.inferSubmoduleIDFromLocation(D->getLocation()));
163}
164
165void ASTDeclWriter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
166  llvm_unreachable("Translation units aren't directly serialized");
167}
168
169void ASTDeclWriter::VisitNamedDecl(NamedDecl *D) {
170  VisitDecl(D);
171  Writer.AddDeclarationName(D->getDeclName(), Record);
172}
173
174void ASTDeclWriter::VisitTypeDecl(TypeDecl *D) {
175  VisitNamedDecl(D);
176  Writer.AddSourceLocation(D->getLocStart(), Record);
177  Writer.AddTypeRef(QualType(D->getTypeForDecl(), 0), Record);
178}
179
180void ASTDeclWriter::VisitTypedefNameDecl(TypedefNameDecl *D) {
181  VisitRedeclarable(D);
182  VisitTypeDecl(D);
183  Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
184}
185
186void ASTDeclWriter::VisitTypedefDecl(TypedefDecl *D) {
187  VisitTypedefNameDecl(D);
188  if (!D->hasAttrs() &&
189      !D->isImplicit() &&
190      !D->isUsed(false) &&
191      D->getFirstDeclaration() == D->getMostRecentDecl() &&
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
203void ASTDeclWriter::VisitTypeAliasDecl(TypeAliasDecl *D) {
204  VisitTypedefNameDecl(D);
205  Code = serialization::DECL_TYPEALIAS;
206}
207
208void 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
224void 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  if (MemberSpecializationInfo *MemberInfo = D->getMemberSpecializationInfo()) {
236    Writer.AddDeclRef(MemberInfo->getInstantiatedFrom(), Record);
237    Record.push_back(MemberInfo->getTemplateSpecializationKind());
238    Writer.AddSourceLocation(MemberInfo->getPointOfInstantiation(), Record);
239  } else {
240    Writer.AddDeclRef(0, Record);
241  }
242
243  if (!D->hasAttrs() &&
244      !D->isImplicit() &&
245      !D->isUsed(false) &&
246      !D->hasExtInfo() &&
247      D->getFirstDeclaration() == D->getMostRecentDecl() &&
248      !D->isInvalidDecl() &&
249      !D->isReferenced() &&
250      !D->isTopLevelDeclInObjCContainer() &&
251      D->getAccess() == AS_none &&
252      !D->isModulePrivate() &&
253      !CXXRecordDecl::classofKind(D->getKind()) &&
254      !D->getIntegerTypeSourceInfo() &&
255      D->getDeclName().getNameKind() == DeclarationName::Identifier)
256    AbbrevToUse = Writer.getDeclEnumAbbrev();
257
258  Code = serialization::DECL_ENUM;
259}
260
261void ASTDeclWriter::VisitRecordDecl(RecordDecl *D) {
262  VisitTagDecl(D);
263  Record.push_back(D->hasFlexibleArrayMember());
264  Record.push_back(D->isAnonymousStructOrUnion());
265  Record.push_back(D->hasObjectMember());
266
267  if (!D->hasAttrs() &&
268      !D->isImplicit() &&
269      !D->isUsed(false) &&
270      !D->hasExtInfo() &&
271      D->getFirstDeclaration() == D->getMostRecentDecl() &&
272      !D->isInvalidDecl() &&
273      !D->isReferenced() &&
274      !D->isTopLevelDeclInObjCContainer() &&
275      D->getAccess() == AS_none &&
276      !D->isModulePrivate() &&
277      !CXXRecordDecl::classofKind(D->getKind()) &&
278      D->getDeclName().getNameKind() == DeclarationName::Identifier)
279    AbbrevToUse = Writer.getDeclRecordAbbrev();
280
281  Code = serialization::DECL_RECORD;
282}
283
284void ASTDeclWriter::VisitValueDecl(ValueDecl *D) {
285  VisitNamedDecl(D);
286  Writer.AddTypeRef(D->getType(), Record);
287}
288
289void ASTDeclWriter::VisitEnumConstantDecl(EnumConstantDecl *D) {
290  VisitValueDecl(D);
291  Record.push_back(D->getInitExpr()? 1 : 0);
292  if (D->getInitExpr())
293    Writer.AddStmt(D->getInitExpr());
294  Writer.AddAPSInt(D->getInitVal(), Record);
295
296  Code = serialization::DECL_ENUM_CONSTANT;
297}
298
299void ASTDeclWriter::VisitDeclaratorDecl(DeclaratorDecl *D) {
300  VisitValueDecl(D);
301  Writer.AddSourceLocation(D->getInnerLocStart(), Record);
302  Record.push_back(D->hasExtInfo());
303  if (D->hasExtInfo())
304    Writer.AddQualifierInfo(*D->getExtInfo(), Record);
305}
306
307void ASTDeclWriter::VisitFunctionDecl(FunctionDecl *D) {
308  VisitRedeclarable(D);
309  VisitDeclaratorDecl(D);
310
311  Writer.AddDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record);
312  Record.push_back(D->getIdentifierNamespace());
313
314  // FunctionDecl's body is handled last at ASTWriterDecl::Visit,
315  // after everything else is written.
316
317  Record.push_back(D->getStorageClass()); // FIXME: stable encoding
318  Record.push_back(D->getStorageClassAsWritten());
319  Record.push_back(D->IsInline);
320  Record.push_back(D->isInlineSpecified());
321  Record.push_back(D->isVirtualAsWritten());
322  Record.push_back(D->isPure());
323  Record.push_back(D->hasInheritedPrototype());
324  Record.push_back(D->hasWrittenPrototype());
325  Record.push_back(D->isDeletedAsWritten());
326  Record.push_back(D->isTrivial());
327  Record.push_back(D->isDefaulted());
328  Record.push_back(D->isExplicitlyDefaulted());
329  Record.push_back(D->hasImplicitReturnZero());
330  Record.push_back(D->isConstexpr());
331  Record.push_back(D->HasSkippedBody);
332  Writer.AddSourceLocation(D->getLocEnd(), Record);
333
334  Record.push_back(D->getTemplatedKind());
335  switch (D->getTemplatedKind()) {
336  case FunctionDecl::TK_NonTemplate:
337    break;
338  case FunctionDecl::TK_FunctionTemplate:
339    Writer.AddDeclRef(D->getDescribedFunctionTemplate(), Record);
340    break;
341  case FunctionDecl::TK_MemberSpecialization: {
342    MemberSpecializationInfo *MemberInfo = D->getMemberSpecializationInfo();
343    Writer.AddDeclRef(MemberInfo->getInstantiatedFrom(), Record);
344    Record.push_back(MemberInfo->getTemplateSpecializationKind());
345    Writer.AddSourceLocation(MemberInfo->getPointOfInstantiation(), Record);
346    break;
347  }
348  case FunctionDecl::TK_FunctionTemplateSpecialization: {
349    FunctionTemplateSpecializationInfo *
350      FTSInfo = D->getTemplateSpecializationInfo();
351    Writer.AddDeclRef(FTSInfo->getTemplate(), Record);
352    Record.push_back(FTSInfo->getTemplateSpecializationKind());
353
354    // Template arguments.
355    Writer.AddTemplateArgumentList(FTSInfo->TemplateArguments, Record);
356
357    // Template args as written.
358    Record.push_back(FTSInfo->TemplateArgumentsAsWritten != 0);
359    if (FTSInfo->TemplateArgumentsAsWritten) {
360      Record.push_back(FTSInfo->TemplateArgumentsAsWritten->NumTemplateArgs);
361      for (int i=0, e = FTSInfo->TemplateArgumentsAsWritten->NumTemplateArgs;
362             i!=e; ++i)
363        Writer.AddTemplateArgumentLoc((*FTSInfo->TemplateArgumentsAsWritten)[i],
364                                      Record);
365      Writer.AddSourceLocation(FTSInfo->TemplateArgumentsAsWritten->LAngleLoc,
366                               Record);
367      Writer.AddSourceLocation(FTSInfo->TemplateArgumentsAsWritten->RAngleLoc,
368                               Record);
369    }
370
371    Writer.AddSourceLocation(FTSInfo->getPointOfInstantiation(), Record);
372
373    if (D->isCanonicalDecl()) {
374      // Write the template that contains the specializations set. We will
375      // add a FunctionTemplateSpecializationInfo to it when reading.
376      Writer.AddDeclRef(FTSInfo->getTemplate()->getCanonicalDecl(), Record);
377    }
378    break;
379  }
380  case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
381    DependentFunctionTemplateSpecializationInfo *
382      DFTSInfo = D->getDependentSpecializationInfo();
383
384    // Templates.
385    Record.push_back(DFTSInfo->getNumTemplates());
386    for (int i=0, e = DFTSInfo->getNumTemplates(); i != e; ++i)
387      Writer.AddDeclRef(DFTSInfo->getTemplate(i), Record);
388
389    // Templates args.
390    Record.push_back(DFTSInfo->getNumTemplateArgs());
391    for (int i=0, e = DFTSInfo->getNumTemplateArgs(); i != e; ++i)
392      Writer.AddTemplateArgumentLoc(DFTSInfo->getTemplateArg(i), Record);
393    Writer.AddSourceLocation(DFTSInfo->getLAngleLoc(), Record);
394    Writer.AddSourceLocation(DFTSInfo->getRAngleLoc(), Record);
395    break;
396  }
397  }
398
399  Record.push_back(D->param_size());
400  for (FunctionDecl::param_iterator P = D->param_begin(), PEnd = D->param_end();
401       P != PEnd; ++P)
402    Writer.AddDeclRef(*P, Record);
403  Code = serialization::DECL_FUNCTION;
404}
405
406void ASTDeclWriter::VisitObjCMethodDecl(ObjCMethodDecl *D) {
407  VisitNamedDecl(D);
408  // FIXME: convert to LazyStmtPtr?
409  // Unlike C/C++, method bodies will never be in header files.
410  bool HasBodyStuff = D->getBody() != 0     ||
411                      D->getSelfDecl() != 0 || D->getCmdDecl() != 0;
412  Record.push_back(HasBodyStuff);
413  if (HasBodyStuff) {
414    Writer.AddStmt(D->getBody());
415    Writer.AddDeclRef(D->getSelfDecl(), Record);
416    Writer.AddDeclRef(D->getCmdDecl(), Record);
417  }
418  Record.push_back(D->isInstanceMethod());
419  Record.push_back(D->isVariadic());
420  Record.push_back(D->isPropertyAccessor());
421  Record.push_back(D->isDefined());
422  Record.push_back(D->IsOverriding);
423  Record.push_back(D->HasSkippedBody);
424
425  Record.push_back(D->IsRedeclaration);
426  Record.push_back(D->HasRedeclaration);
427  if (D->HasRedeclaration) {
428    assert(Context.getObjCMethodRedeclaration(D));
429    Writer.AddDeclRef(Context.getObjCMethodRedeclaration(D), Record);
430  }
431
432  // FIXME: stable encoding for @required/@optional
433  Record.push_back(D->getImplementationControl());
434  // FIXME: stable encoding for in/out/inout/bycopy/byref/oneway
435  Record.push_back(D->getObjCDeclQualifier());
436  Record.push_back(D->hasRelatedResultType());
437  Writer.AddTypeRef(D->getResultType(), Record);
438  Writer.AddTypeSourceInfo(D->getResultTypeSourceInfo(), Record);
439  Writer.AddSourceLocation(D->getLocEnd(), Record);
440  Record.push_back(D->param_size());
441  for (ObjCMethodDecl::param_iterator P = D->param_begin(),
442                                   PEnd = D->param_end(); P != PEnd; ++P)
443    Writer.AddDeclRef(*P, Record);
444
445  Record.push_back(D->SelLocsKind);
446  unsigned NumStoredSelLocs = D->getNumStoredSelLocs();
447  SourceLocation *SelLocs = D->getStoredSelLocs();
448  Record.push_back(NumStoredSelLocs);
449  for (unsigned i = 0; i != NumStoredSelLocs; ++i)
450    Writer.AddSourceLocation(SelLocs[i], Record);
451
452  Code = serialization::DECL_OBJC_METHOD;
453}
454
455void ASTDeclWriter::VisitObjCContainerDecl(ObjCContainerDecl *D) {
456  VisitNamedDecl(D);
457  Writer.AddSourceLocation(D->getAtStartLoc(), Record);
458  Writer.AddSourceRange(D->getAtEndRange(), Record);
459  // Abstract class (no need to define a stable serialization::DECL code).
460}
461
462void ASTDeclWriter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *D) {
463  VisitRedeclarable(D);
464  VisitObjCContainerDecl(D);
465  Writer.AddTypeRef(QualType(D->getTypeForDecl(), 0), Record);
466
467  Record.push_back(D->isThisDeclarationADefinition());
468  if (D->isThisDeclarationADefinition()) {
469    // Write the DefinitionData
470    ObjCInterfaceDecl::DefinitionData &Data = D->data();
471
472    Writer.AddDeclRef(D->getSuperClass(), Record);
473    Writer.AddSourceLocation(D->getSuperClassLoc(), Record);
474    Writer.AddSourceLocation(D->getEndOfDefinitionLoc(), Record);
475
476    // Write out the protocols that are directly referenced by the @interface.
477    Record.push_back(Data.ReferencedProtocols.size());
478    for (ObjCInterfaceDecl::protocol_iterator P = D->protocol_begin(),
479                                           PEnd = D->protocol_end();
480         P != PEnd; ++P)
481      Writer.AddDeclRef(*P, Record);
482    for (ObjCInterfaceDecl::protocol_loc_iterator PL = D->protocol_loc_begin(),
483         PLEnd = D->protocol_loc_end();
484         PL != PLEnd; ++PL)
485      Writer.AddSourceLocation(*PL, Record);
486
487    // Write out the protocols that are transitively referenced.
488    Record.push_back(Data.AllReferencedProtocols.size());
489    for (ObjCList<ObjCProtocolDecl>::iterator
490              P = Data.AllReferencedProtocols.begin(),
491           PEnd = Data.AllReferencedProtocols.end();
492         P != PEnd; ++P)
493      Writer.AddDeclRef(*P, Record);
494
495
496    if (ObjCCategoryDecl *Cat = D->getCategoryListRaw()) {
497      // Ensure that we write out the set of categories for this class.
498      Writer.ObjCClassesWithCategories.insert(D);
499
500      // Make sure that the categories get serialized.
501      for (; Cat; Cat = Cat->getNextClassCategoryRaw())
502        (void)Writer.GetDeclRef(Cat);
503    }
504  }
505
506  Code = serialization::DECL_OBJC_INTERFACE;
507}
508
509void ASTDeclWriter::VisitObjCIvarDecl(ObjCIvarDecl *D) {
510  VisitFieldDecl(D);
511  // FIXME: stable encoding for @public/@private/@protected/@package
512  Record.push_back(D->getAccessControl());
513  Record.push_back(D->getSynthesize());
514
515  if (!D->hasAttrs() &&
516      !D->isImplicit() &&
517      !D->isUsed(false) &&
518      !D->isInvalidDecl() &&
519      !D->isReferenced() &&
520      !D->isModulePrivate() &&
521      !D->getBitWidth() &&
522      !D->hasExtInfo() &&
523      D->getDeclName())
524    AbbrevToUse = Writer.getDeclObjCIvarAbbrev();
525
526  Code = serialization::DECL_OBJC_IVAR;
527}
528
529void ASTDeclWriter::VisitObjCProtocolDecl(ObjCProtocolDecl *D) {
530  VisitRedeclarable(D);
531  VisitObjCContainerDecl(D);
532
533  Record.push_back(D->isThisDeclarationADefinition());
534  if (D->isThisDeclarationADefinition()) {
535    Record.push_back(D->protocol_size());
536    for (ObjCProtocolDecl::protocol_iterator
537         I = D->protocol_begin(), IEnd = D->protocol_end(); I != IEnd; ++I)
538      Writer.AddDeclRef(*I, Record);
539    for (ObjCProtocolDecl::protocol_loc_iterator PL = D->protocol_loc_begin(),
540           PLEnd = D->protocol_loc_end();
541         PL != PLEnd; ++PL)
542      Writer.AddSourceLocation(*PL, Record);
543  }
544
545  Code = serialization::DECL_OBJC_PROTOCOL;
546}
547
548void ASTDeclWriter::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D) {
549  VisitFieldDecl(D);
550  Code = serialization::DECL_OBJC_AT_DEFS_FIELD;
551}
552
553void ASTDeclWriter::VisitObjCCategoryDecl(ObjCCategoryDecl *D) {
554  VisitObjCContainerDecl(D);
555  Writer.AddSourceLocation(D->getCategoryNameLoc(), Record);
556  Writer.AddSourceLocation(D->getIvarLBraceLoc(), Record);
557  Writer.AddSourceLocation(D->getIvarRBraceLoc(), Record);
558  Writer.AddDeclRef(D->getClassInterface(), Record);
559  Record.push_back(D->protocol_size());
560  for (ObjCCategoryDecl::protocol_iterator
561       I = D->protocol_begin(), IEnd = D->protocol_end(); I != IEnd; ++I)
562    Writer.AddDeclRef(*I, Record);
563  for (ObjCCategoryDecl::protocol_loc_iterator
564         PL = D->protocol_loc_begin(), PLEnd = D->protocol_loc_end();
565       PL != PLEnd; ++PL)
566    Writer.AddSourceLocation(*PL, Record);
567  Code = serialization::DECL_OBJC_CATEGORY;
568}
569
570void ASTDeclWriter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D) {
571  VisitNamedDecl(D);
572  Writer.AddDeclRef(D->getClassInterface(), Record);
573  Code = serialization::DECL_OBJC_COMPATIBLE_ALIAS;
574}
575
576void ASTDeclWriter::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
577  VisitNamedDecl(D);
578  Writer.AddSourceLocation(D->getAtLoc(), Record);
579  Writer.AddSourceLocation(D->getLParenLoc(), Record);
580  Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
581  // FIXME: stable encoding
582  Record.push_back((unsigned)D->getPropertyAttributes());
583  Record.push_back((unsigned)D->getPropertyAttributesAsWritten());
584  // FIXME: stable encoding
585  Record.push_back((unsigned)D->getPropertyImplementation());
586  Writer.AddDeclarationName(D->getGetterName(), Record);
587  Writer.AddDeclarationName(D->getSetterName(), Record);
588  Writer.AddDeclRef(D->getGetterMethodDecl(), Record);
589  Writer.AddDeclRef(D->getSetterMethodDecl(), Record);
590  Writer.AddDeclRef(D->getPropertyIvarDecl(), Record);
591  Code = serialization::DECL_OBJC_PROPERTY;
592}
593
594void ASTDeclWriter::VisitObjCImplDecl(ObjCImplDecl *D) {
595  VisitObjCContainerDecl(D);
596  Writer.AddDeclRef(D->getClassInterface(), Record);
597  // Abstract class (no need to define a stable serialization::DECL code).
598}
599
600void ASTDeclWriter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
601  VisitObjCImplDecl(D);
602  Writer.AddIdentifierRef(D->getIdentifier(), Record);
603  Writer.AddSourceLocation(D->getCategoryNameLoc(), Record);
604  Code = serialization::DECL_OBJC_CATEGORY_IMPL;
605}
606
607void ASTDeclWriter::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
608  VisitObjCImplDecl(D);
609  Writer.AddDeclRef(D->getSuperClass(), Record);
610  Writer.AddSourceLocation(D->getIvarLBraceLoc(), Record);
611  Writer.AddSourceLocation(D->getIvarRBraceLoc(), Record);
612  Record.push_back(D->hasNonZeroConstructors());
613  Record.push_back(D->hasDestructors());
614  Writer.AddCXXCtorInitializers(D->IvarInitializers, D->NumIvarInitializers,
615                                Record);
616  Code = serialization::DECL_OBJC_IMPLEMENTATION;
617}
618
619void ASTDeclWriter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
620  VisitDecl(D);
621  Writer.AddSourceLocation(D->getLocStart(), Record);
622  Writer.AddDeclRef(D->getPropertyDecl(), Record);
623  Writer.AddDeclRef(D->getPropertyIvarDecl(), Record);
624  Writer.AddSourceLocation(D->getPropertyIvarDeclLoc(), Record);
625  Writer.AddStmt(D->getGetterCXXConstructor());
626  Writer.AddStmt(D->getSetterCXXAssignment());
627  Code = serialization::DECL_OBJC_PROPERTY_IMPL;
628}
629
630void ASTDeclWriter::VisitFieldDecl(FieldDecl *D) {
631  VisitDeclaratorDecl(D);
632  Record.push_back(D->isMutable());
633  if (D->InitializerOrBitWidth.getInt() != ICIS_NoInit ||
634      D->InitializerOrBitWidth.getPointer()) {
635    Record.push_back(D->InitializerOrBitWidth.getInt() + 1);
636    Writer.AddStmt(D->InitializerOrBitWidth.getPointer());
637  } else {
638    Record.push_back(0);
639  }
640  if (!D->getDeclName())
641    Writer.AddDeclRef(Context.getInstantiatedFromUnnamedFieldDecl(D), Record);
642
643  if (!D->hasAttrs() &&
644      !D->isImplicit() &&
645      !D->isUsed(false) &&
646      !D->isInvalidDecl() &&
647      !D->isReferenced() &&
648      !D->isTopLevelDeclInObjCContainer() &&
649      !D->isModulePrivate() &&
650      !D->getBitWidth() &&
651      !D->hasInClassInitializer() &&
652      !D->hasExtInfo() &&
653      !ObjCIvarDecl::classofKind(D->getKind()) &&
654      !ObjCAtDefsFieldDecl::classofKind(D->getKind()) &&
655      D->getDeclName())
656    AbbrevToUse = Writer.getDeclFieldAbbrev();
657
658  Code = serialization::DECL_FIELD;
659}
660
661void ASTDeclWriter::VisitIndirectFieldDecl(IndirectFieldDecl *D) {
662  VisitValueDecl(D);
663  Record.push_back(D->getChainingSize());
664
665  for (IndirectFieldDecl::chain_iterator
666       P = D->chain_begin(),
667       PEnd = D->chain_end(); P != PEnd; ++P)
668    Writer.AddDeclRef(*P, Record);
669  Code = serialization::DECL_INDIRECTFIELD;
670}
671
672void ASTDeclWriter::VisitVarDecl(VarDecl *D) {
673  VisitRedeclarable(D);
674  VisitDeclaratorDecl(D);
675  Record.push_back(D->getStorageClass()); // FIXME: stable encoding
676  Record.push_back(D->getStorageClassAsWritten());
677  Record.push_back(D->isThreadSpecified());
678  Record.push_back(D->getInitStyle());
679  Record.push_back(D->isExceptionVariable());
680  Record.push_back(D->isNRVOVariable());
681  Record.push_back(D->isCXXForRangeDecl());
682  Record.push_back(D->isARCPseudoStrong());
683  Record.push_back(D->isConstexpr());
684
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->getFirstDeclaration() == D->getMostRecentDecl() &&
712      D->getInitStyle() == VarDecl::CInit &&
713      D->getInit() == 0 &&
714      !isa<ParmVarDecl>(D) &&
715      !D->isConstexpr() &&
716      !SpecInfo)
717    AbbrevToUse = Writer.getDeclVarAbbrev();
718
719  Code = serialization::DECL_VAR;
720}
721
722void ASTDeclWriter::VisitImplicitParamDecl(ImplicitParamDecl *D) {
723  VisitVarDecl(D);
724  Code = serialization::DECL_IMPLICIT_PARAM;
725}
726
727void ASTDeclWriter::VisitParmVarDecl(ParmVarDecl *D) {
728  VisitVarDecl(D);
729  Record.push_back(D->isObjCMethodParameter());
730  Record.push_back(D->getFunctionScopeDepth());
731  Record.push_back(D->getFunctionScopeIndex());
732  Record.push_back(D->getObjCDeclQualifier()); // FIXME: stable encoding
733  Record.push_back(D->isKNRPromoted());
734  Record.push_back(D->hasInheritedDefaultArg());
735  Record.push_back(D->hasUninstantiatedDefaultArg());
736  if (D->hasUninstantiatedDefaultArg())
737    Writer.AddStmt(D->getUninstantiatedDefaultArg());
738  Code = serialization::DECL_PARM_VAR;
739
740  assert(!D->isARCPseudoStrong()); // can be true of ImplicitParamDecl
741
742  // If the assumptions about the DECL_PARM_VAR abbrev are true, use it.  Here
743  // we dynamically check for the properties that we optimize for, but don't
744  // know are true of all PARM_VAR_DECLs.
745  if (!D->hasAttrs() &&
746      !D->hasExtInfo() &&
747      !D->isImplicit() &&
748      !D->isUsed(false) &&
749      !D->isInvalidDecl() &&
750      !D->isReferenced() &&
751      D->getAccess() == AS_none &&
752      !D->isModulePrivate() &&
753      D->getStorageClass() == 0 &&
754      D->getInitStyle() == VarDecl::CInit && // Can params have anything else?
755      D->getFunctionScopeDepth() == 0 &&
756      D->getObjCDeclQualifier() == 0 &&
757      !D->isKNRPromoted() &&
758      !D->hasInheritedDefaultArg() &&
759      D->getInit() == 0 &&
760      !D->hasUninstantiatedDefaultArg())  // No default expr.
761    AbbrevToUse = Writer.getDeclParmVarAbbrev();
762
763  // Check things we know are true of *every* PARM_VAR_DECL, which is more than
764  // just us assuming it.
765  assert(!D->isThreadSpecified() && "PARM_VAR_DECL can't be __thread");
766  assert(D->getAccess() == AS_none && "PARM_VAR_DECL can't be public/private");
767  assert(!D->isExceptionVariable() && "PARM_VAR_DECL can't be exception var");
768  assert(D->getPreviousDecl() == 0 && "PARM_VAR_DECL can't be redecl");
769  assert(!D->isStaticDataMember() &&
770         "PARM_VAR_DECL can't be static data member");
771}
772
773void ASTDeclWriter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
774  VisitDecl(D);
775  Writer.AddStmt(D->getAsmString());
776  Writer.AddSourceLocation(D->getRParenLoc(), Record);
777  Code = serialization::DECL_FILE_SCOPE_ASM;
778}
779
780void ASTDeclWriter::VisitBlockDecl(BlockDecl *D) {
781  VisitDecl(D);
782  Writer.AddStmt(D->getBody());
783  Writer.AddTypeSourceInfo(D->getSignatureAsWritten(), Record);
784  Record.push_back(D->param_size());
785  for (FunctionDecl::param_iterator P = D->param_begin(), PEnd = D->param_end();
786       P != PEnd; ++P)
787    Writer.AddDeclRef(*P, Record);
788  Record.push_back(D->isVariadic());
789  Record.push_back(D->blockMissingReturnType());
790  Record.push_back(D->isConversionFromLambda());
791  Record.push_back(D->capturesCXXThis());
792  Record.push_back(D->getNumCaptures());
793  for (BlockDecl::capture_iterator
794         i = D->capture_begin(), e = D->capture_end(); i != e; ++i) {
795    const BlockDecl::Capture &capture = *i;
796    Writer.AddDeclRef(capture.getVariable(), Record);
797
798    unsigned flags = 0;
799    if (capture.isByRef()) flags |= 1;
800    if (capture.isNested()) flags |= 2;
801    if (capture.hasCopyExpr()) flags |= 4;
802    Record.push_back(flags);
803
804    if (capture.hasCopyExpr()) Writer.AddStmt(capture.getCopyExpr());
805  }
806
807  Code = serialization::DECL_BLOCK;
808}
809
810void ASTDeclWriter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
811  VisitDecl(D);
812  Record.push_back(D->getLanguage());
813  Writer.AddSourceLocation(D->getExternLoc(), Record);
814  Writer.AddSourceLocation(D->getRBraceLoc(), Record);
815  Code = serialization::DECL_LINKAGE_SPEC;
816}
817
818void ASTDeclWriter::VisitLabelDecl(LabelDecl *D) {
819  VisitNamedDecl(D);
820  Writer.AddSourceLocation(D->getLocStart(), Record);
821  Code = serialization::DECL_LABEL;
822}
823
824
825void ASTDeclWriter::VisitNamespaceDecl(NamespaceDecl *D) {
826  VisitRedeclarable(D);
827  VisitNamedDecl(D);
828  Record.push_back(D->isInline());
829  Writer.AddSourceLocation(D->getLocStart(), Record);
830  Writer.AddSourceLocation(D->getRBraceLoc(), Record);
831
832  if (D->isOriginalNamespace())
833    Writer.AddDeclRef(D->getAnonymousNamespace(), Record);
834  Code = serialization::DECL_NAMESPACE;
835
836  if (Writer.hasChain() && !D->isOriginalNamespace() &&
837      D->getOriginalNamespace()->isFromASTFile()) {
838    NamespaceDecl *NS = D->getOriginalNamespace();
839    Writer.AddUpdatedDeclContext(NS);
840
841    // Make sure all visible decls are written. They will be recorded later.
842    if (StoredDeclsMap *Map = NS->buildLookup()) {
843      for (StoredDeclsMap::iterator D = Map->begin(), DEnd = Map->end();
844           D != DEnd; ++D) {
845        DeclContext::lookup_result R = D->second.getLookupResult();
846        for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E;
847             ++I)
848          Writer.GetDeclRef(*I);
849      }
850    }
851  }
852
853  if (Writer.hasChain() && D->isAnonymousNamespace() &&
854      D == D->getMostRecentDecl()) {
855    // This is a most recent reopening of the anonymous namespace. If its parent
856    // is in a previous PCH (or is the TU), mark that parent for update, because
857    // the original namespace always points to the latest re-opening of its
858    // anonymous namespace.
859    Decl *Parent = cast<Decl>(
860        D->getParent()->getRedeclContext()->getPrimaryContext());
861    if (Parent->isFromASTFile() || isa<TranslationUnitDecl>(Parent)) {
862      ASTWriter::UpdateRecord &Record = Writer.DeclUpdates[Parent];
863      Record.push_back(UPD_CXX_ADDED_ANONYMOUS_NAMESPACE);
864      Writer.AddDeclRef(D, Record);
865    }
866  }
867}
868
869void ASTDeclWriter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
870  VisitNamedDecl(D);
871  Writer.AddSourceLocation(D->getNamespaceLoc(), Record);
872  Writer.AddSourceLocation(D->getTargetNameLoc(), Record);
873  Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
874  Writer.AddDeclRef(D->getNamespace(), Record);
875  Code = serialization::DECL_NAMESPACE_ALIAS;
876}
877
878void ASTDeclWriter::VisitUsingDecl(UsingDecl *D) {
879  VisitNamedDecl(D);
880  Writer.AddSourceLocation(D->getUsingLocation(), Record);
881  Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
882  Writer.AddDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record);
883  Writer.AddDeclRef(D->FirstUsingShadow.getPointer(), Record);
884  Record.push_back(D->isTypeName());
885  Writer.AddDeclRef(Context.getInstantiatedFromUsingDecl(D), Record);
886  Code = serialization::DECL_USING;
887}
888
889void ASTDeclWriter::VisitUsingShadowDecl(UsingShadowDecl *D) {
890  VisitNamedDecl(D);
891  Writer.AddDeclRef(D->getTargetDecl(), Record);
892  Writer.AddDeclRef(D->UsingOrNextShadow, Record);
893  Writer.AddDeclRef(Context.getInstantiatedFromUsingShadowDecl(D), Record);
894  Code = serialization::DECL_USING_SHADOW;
895}
896
897void ASTDeclWriter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
898  VisitNamedDecl(D);
899  Writer.AddSourceLocation(D->getUsingLoc(), Record);
900  Writer.AddSourceLocation(D->getNamespaceKeyLocation(), Record);
901  Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
902  Writer.AddDeclRef(D->getNominatedNamespace(), Record);
903  Writer.AddDeclRef(dyn_cast<Decl>(D->getCommonAncestor()), Record);
904  Code = serialization::DECL_USING_DIRECTIVE;
905}
906
907void ASTDeclWriter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
908  VisitValueDecl(D);
909  Writer.AddSourceLocation(D->getUsingLoc(), Record);
910  Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
911  Writer.AddDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record);
912  Code = serialization::DECL_UNRESOLVED_USING_VALUE;
913}
914
915void ASTDeclWriter::VisitUnresolvedUsingTypenameDecl(
916                                               UnresolvedUsingTypenameDecl *D) {
917  VisitTypeDecl(D);
918  Writer.AddSourceLocation(D->getTypenameLoc(), Record);
919  Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
920  Code = serialization::DECL_UNRESOLVED_USING_TYPENAME;
921}
922
923void ASTDeclWriter::VisitCXXRecordDecl(CXXRecordDecl *D) {
924  VisitRecordDecl(D);
925  Record.push_back(D->isThisDeclarationADefinition());
926  if (D->isThisDeclarationADefinition())
927    Writer.AddCXXDefinitionData(D, Record);
928
929  enum {
930    CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
931  };
932  if (ClassTemplateDecl *TemplD = D->getDescribedClassTemplate()) {
933    Record.push_back(CXXRecTemplate);
934    Writer.AddDeclRef(TemplD, Record);
935  } else if (MemberSpecializationInfo *MSInfo
936               = D->getMemberSpecializationInfo()) {
937    Record.push_back(CXXRecMemberSpecialization);
938    Writer.AddDeclRef(MSInfo->getInstantiatedFrom(), Record);
939    Record.push_back(MSInfo->getTemplateSpecializationKind());
940    Writer.AddSourceLocation(MSInfo->getPointOfInstantiation(), Record);
941  } else {
942    Record.push_back(CXXRecNotTemplate);
943  }
944
945  // Store the key function to avoid deserializing every method so we can
946  // compute it.
947  if (D->IsCompleteDefinition)
948    Writer.AddDeclRef(Context.getKeyFunction(D), Record);
949
950  Code = serialization::DECL_CXX_RECORD;
951}
952
953void ASTDeclWriter::VisitCXXMethodDecl(CXXMethodDecl *D) {
954  VisitFunctionDecl(D);
955  if (D->isCanonicalDecl()) {
956    Record.push_back(D->size_overridden_methods());
957    for (CXXMethodDecl::method_iterator
958           I = D->begin_overridden_methods(), E = D->end_overridden_methods();
959           I != E; ++I)
960      Writer.AddDeclRef(*I, Record);
961  } else {
962    // We only need to record overridden methods once for the canonical decl.
963    Record.push_back(0);
964  }
965  Code = serialization::DECL_CXX_METHOD;
966}
967
968void 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
979void 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
988void ASTDeclWriter::VisitCXXConversionDecl(CXXConversionDecl *D) {
989  VisitCXXMethodDecl(D);
990  Record.push_back(D->IsExplicitSpecified);
991  Code = serialization::DECL_CXX_CONVERSION;
992}
993
994void ASTDeclWriter::VisitImportDecl(ImportDecl *D) {
995  VisitDecl(D);
996  Record.push_back(Writer.getSubmoduleID(D->getImportedModule()));
997  ArrayRef<SourceLocation> IdentifierLocs = D->getIdentifierLocs();
998  Record.push_back(!IdentifierLocs.empty());
999  if (IdentifierLocs.empty()) {
1000    Writer.AddSourceLocation(D->getLocEnd(), Record);
1001    Record.push_back(1);
1002  } else {
1003    for (unsigned I = 0, N = IdentifierLocs.size(); I != N; ++I)
1004      Writer.AddSourceLocation(IdentifierLocs[I], Record);
1005    Record.push_back(IdentifierLocs.size());
1006  }
1007  // Note: the number of source locations must always be the last element in
1008  // the record.
1009  Code = serialization::DECL_IMPORT;
1010}
1011
1012void ASTDeclWriter::VisitAccessSpecDecl(AccessSpecDecl *D) {
1013  VisitDecl(D);
1014  Writer.AddSourceLocation(D->getColonLoc(), Record);
1015  Code = serialization::DECL_ACCESS_SPEC;
1016}
1017
1018void ASTDeclWriter::VisitFriendDecl(FriendDecl *D) {
1019  VisitDecl(D);
1020  Record.push_back(D->Friend.is<TypeSourceInfo*>());
1021  if (D->Friend.is<TypeSourceInfo*>())
1022    Writer.AddTypeSourceInfo(D->Friend.get<TypeSourceInfo*>(), Record);
1023  else
1024    Writer.AddDeclRef(D->Friend.get<NamedDecl*>(), Record);
1025  Writer.AddDeclRef(D->getNextFriend(), Record);
1026  Record.push_back(D->UnsupportedFriend);
1027  Writer.AddSourceLocation(D->FriendLoc, Record);
1028  Code = serialization::DECL_FRIEND;
1029}
1030
1031void ASTDeclWriter::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1032  VisitDecl(D);
1033  Record.push_back(D->getNumTemplateParameters());
1034  for (unsigned i = 0, e = D->getNumTemplateParameters(); i != e; ++i)
1035    Writer.AddTemplateParameterList(D->getTemplateParameterList(i), Record);
1036  Record.push_back(D->getFriendDecl() != 0);
1037  if (D->getFriendDecl())
1038    Writer.AddDeclRef(D->getFriendDecl(), Record);
1039  else
1040    Writer.AddTypeSourceInfo(D->getFriendType(), Record);
1041  Writer.AddSourceLocation(D->getFriendLoc(), Record);
1042  Code = serialization::DECL_FRIEND_TEMPLATE;
1043}
1044
1045void ASTDeclWriter::VisitTemplateDecl(TemplateDecl *D) {
1046  VisitNamedDecl(D);
1047
1048  Writer.AddDeclRef(D->getTemplatedDecl(), Record);
1049  Writer.AddTemplateParameterList(D->getTemplateParameters(), Record);
1050}
1051
1052void ASTDeclWriter::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1053  VisitRedeclarable(D);
1054
1055  // Emit data to initialize CommonOrPrev before VisitTemplateDecl so that
1056  // getCommonPtr() can be used while this is still initializing.
1057  if (D->isFirstDeclaration()) {
1058    // This declaration owns the 'common' pointer, so serialize that data now.
1059    Writer.AddDeclRef(D->getInstantiatedFromMemberTemplate(), Record);
1060    if (D->getInstantiatedFromMemberTemplate())
1061      Record.push_back(D->isMemberSpecialization());
1062  }
1063
1064  VisitTemplateDecl(D);
1065  Record.push_back(D->getIdentifierNamespace());
1066}
1067
1068void ASTDeclWriter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1069  VisitRedeclarableTemplateDecl(D);
1070
1071  if (D->isFirstDeclaration()) {
1072    typedef llvm::FoldingSetVector<ClassTemplateSpecializationDecl> CTSDSetTy;
1073    CTSDSetTy &CTSDSet = D->getSpecializations();
1074    Record.push_back(CTSDSet.size());
1075    for (CTSDSetTy::iterator I=CTSDSet.begin(), E = CTSDSet.end(); I!=E; ++I) {
1076      assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
1077      Writer.AddDeclRef(&*I, Record);
1078    }
1079
1080    typedef llvm::FoldingSetVector<ClassTemplatePartialSpecializationDecl>
1081      CTPSDSetTy;
1082    CTPSDSetTy &CTPSDSet = D->getPartialSpecializations();
1083    Record.push_back(CTPSDSet.size());
1084    for (CTPSDSetTy::iterator I=CTPSDSet.begin(), E=CTPSDSet.end(); I!=E; ++I) {
1085      assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
1086      Writer.AddDeclRef(&*I, Record);
1087    }
1088
1089    Writer.AddTypeRef(D->getCommonPtr()->InjectedClassNameType, Record);
1090  }
1091  Code = serialization::DECL_CLASS_TEMPLATE;
1092}
1093
1094void ASTDeclWriter::VisitClassTemplateSpecializationDecl(
1095                                           ClassTemplateSpecializationDecl *D) {
1096  VisitCXXRecordDecl(D);
1097
1098  llvm::PointerUnion<ClassTemplateDecl *,
1099                     ClassTemplatePartialSpecializationDecl *> InstFrom
1100    = D->getSpecializedTemplateOrPartial();
1101  if (Decl *InstFromD = InstFrom.dyn_cast<ClassTemplateDecl *>()) {
1102    Writer.AddDeclRef(InstFromD, Record);
1103  } else {
1104    Writer.AddDeclRef(InstFrom.get<ClassTemplatePartialSpecializationDecl *>(),
1105                      Record);
1106    Writer.AddTemplateArgumentList(&D->getTemplateInstantiationArgs(), Record);
1107  }
1108
1109  // Explicit info.
1110  Writer.AddTypeSourceInfo(D->getTypeAsWritten(), Record);
1111  if (D->getTypeAsWritten()) {
1112    Writer.AddSourceLocation(D->getExternLoc(), Record);
1113    Writer.AddSourceLocation(D->getTemplateKeywordLoc(), Record);
1114  }
1115
1116  Writer.AddTemplateArgumentList(&D->getTemplateArgs(), Record);
1117  Writer.AddSourceLocation(D->getPointOfInstantiation(), Record);
1118  Record.push_back(D->getSpecializationKind());
1119  Record.push_back(D->isCanonicalDecl());
1120
1121  if (D->isCanonicalDecl()) {
1122    // When reading, we'll add it to the folding set of the following template.
1123    Writer.AddDeclRef(D->getSpecializedTemplate()->getCanonicalDecl(), Record);
1124  }
1125
1126  Code = serialization::DECL_CLASS_TEMPLATE_SPECIALIZATION;
1127}
1128
1129void ASTDeclWriter::VisitClassTemplatePartialSpecializationDecl(
1130                                    ClassTemplatePartialSpecializationDecl *D) {
1131  VisitClassTemplateSpecializationDecl(D);
1132
1133  Writer.AddTemplateParameterList(D->getTemplateParameters(), Record);
1134
1135  Record.push_back(D->getNumTemplateArgsAsWritten());
1136  for (int i = 0, e = D->getNumTemplateArgsAsWritten(); i != e; ++i)
1137    Writer.AddTemplateArgumentLoc(D->getTemplateArgsAsWritten()[i], Record);
1138
1139  Record.push_back(D->getSequenceNumber());
1140
1141  // These are read/set from/to the first declaration.
1142  if (D->getPreviousDecl() == 0) {
1143    Writer.AddDeclRef(D->getInstantiatedFromMember(), Record);
1144    Record.push_back(D->isMemberSpecialization());
1145  }
1146
1147  Code = serialization::DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION;
1148}
1149
1150void ASTDeclWriter::VisitClassScopeFunctionSpecializationDecl(
1151                                    ClassScopeFunctionSpecializationDecl *D) {
1152  VisitDecl(D);
1153  Writer.AddDeclRef(D->getSpecialization(), Record);
1154  Code = serialization::DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION;
1155}
1156
1157
1158void ASTDeclWriter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1159  VisitRedeclarableTemplateDecl(D);
1160
1161  if (D->isFirstDeclaration()) {
1162    // This FunctionTemplateDecl owns the CommonPtr; write it.
1163
1164    // Write the function specialization declarations.
1165    Record.push_back(D->getSpecializations().size());
1166    for (llvm::FoldingSetVector<FunctionTemplateSpecializationInfo>::iterator
1167           I = D->getSpecializations().begin(),
1168           E = D->getSpecializations().end()   ; I != E; ++I) {
1169      assert(I->Function->isCanonicalDecl() &&
1170             "Expected only canonical decls in set");
1171      Writer.AddDeclRef(I->Function, Record);
1172    }
1173  }
1174  Code = serialization::DECL_FUNCTION_TEMPLATE;
1175}
1176
1177void ASTDeclWriter::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
1178  VisitTypeDecl(D);
1179
1180  Record.push_back(D->wasDeclaredWithTypename());
1181  Record.push_back(D->defaultArgumentWasInherited());
1182  Writer.AddTypeSourceInfo(D->getDefaultArgumentInfo(), Record);
1183
1184  Code = serialization::DECL_TEMPLATE_TYPE_PARM;
1185}
1186
1187void ASTDeclWriter::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
1188  // For an expanded parameter pack, record the number of expansion types here
1189  // so that it's easier for deserialization to allocate the right amount of
1190  // memory.
1191  if (D->isExpandedParameterPack())
1192    Record.push_back(D->getNumExpansionTypes());
1193
1194  VisitDeclaratorDecl(D);
1195  // TemplateParmPosition.
1196  Record.push_back(D->getDepth());
1197  Record.push_back(D->getPosition());
1198
1199  if (D->isExpandedParameterPack()) {
1200    for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
1201      Writer.AddTypeRef(D->getExpansionType(I), Record);
1202      Writer.AddTypeSourceInfo(D->getExpansionTypeSourceInfo(I), Record);
1203    }
1204
1205    Code = serialization::DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK;
1206  } else {
1207    // Rest of NonTypeTemplateParmDecl.
1208    Record.push_back(D->isParameterPack());
1209    Record.push_back(D->getDefaultArgument() != 0);
1210    if (D->getDefaultArgument()) {
1211      Writer.AddStmt(D->getDefaultArgument());
1212      Record.push_back(D->defaultArgumentWasInherited());
1213    }
1214    Code = serialization::DECL_NON_TYPE_TEMPLATE_PARM;
1215  }
1216}
1217
1218void ASTDeclWriter::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
1219  // For an expanded parameter pack, record the number of expansion types here
1220  // so that it's easier for deserialization to allocate the right amount of
1221  // memory.
1222  if (D->isExpandedParameterPack())
1223    Record.push_back(D->getNumExpansionTemplateParameters());
1224
1225  VisitTemplateDecl(D);
1226  // TemplateParmPosition.
1227  Record.push_back(D->getDepth());
1228  Record.push_back(D->getPosition());
1229
1230  if (D->isExpandedParameterPack()) {
1231    for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
1232         I != N; ++I)
1233      Writer.AddTemplateParameterList(D->getExpansionTemplateParameters(I),
1234                                      Record);
1235    Code = serialization::DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK;
1236  } else {
1237    // Rest of TemplateTemplateParmDecl.
1238    Writer.AddTemplateArgumentLoc(D->getDefaultArgument(), Record);
1239    Record.push_back(D->defaultArgumentWasInherited());
1240    Record.push_back(D->isParameterPack());
1241    Code = serialization::DECL_TEMPLATE_TEMPLATE_PARM;
1242  }
1243}
1244
1245void ASTDeclWriter::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
1246  VisitRedeclarableTemplateDecl(D);
1247  Code = serialization::DECL_TYPE_ALIAS_TEMPLATE;
1248}
1249
1250void ASTDeclWriter::VisitStaticAssertDecl(StaticAssertDecl *D) {
1251  VisitDecl(D);
1252  Writer.AddStmt(D->getAssertExpr());
1253  Record.push_back(D->isFailed());
1254  Writer.AddStmt(D->getMessage());
1255  Writer.AddSourceLocation(D->getRParenLoc(), Record);
1256  Code = serialization::DECL_STATIC_ASSERT;
1257}
1258
1259/// \brief Emit the DeclContext part of a declaration context decl.
1260///
1261/// \param LexicalOffset the offset at which the DECL_CONTEXT_LEXICAL
1262/// block for this declaration context is stored. May be 0 to indicate
1263/// that there are no declarations stored within this context.
1264///
1265/// \param VisibleOffset the offset at which the DECL_CONTEXT_VISIBLE
1266/// block for this declaration context is stored. May be 0 to indicate
1267/// that there are no declarations visible from this context. Note
1268/// that this value will not be emitted for non-primary declaration
1269/// contexts.
1270void ASTDeclWriter::VisitDeclContext(DeclContext *DC, uint64_t LexicalOffset,
1271                                     uint64_t VisibleOffset) {
1272  Record.push_back(LexicalOffset);
1273  Record.push_back(VisibleOffset);
1274}
1275
1276template <typename T>
1277void ASTDeclWriter::VisitRedeclarable(Redeclarable<T> *D) {
1278  T *First = D->getFirstDeclaration();
1279  if (First->getMostRecentDecl() != First) {
1280    // There is more than one declaration of this entity, so we will need to
1281    // write a redeclaration chain.
1282    Writer.AddDeclRef(First, Record);
1283    Writer.Redeclarations.insert(First);
1284
1285    // Make sure that we serialize both the previous and the most-recent
1286    // declarations, which (transitively) ensures that all declarations in the
1287    // chain get serialized.
1288    (void)Writer.GetDeclRef(D->getPreviousDecl());
1289    (void)Writer.GetDeclRef(First->getMostRecentDecl());
1290  } else {
1291    // We use the sentinel value 0 to indicate an only declaration.
1292    Record.push_back(0);
1293  }
1294
1295}
1296
1297//===----------------------------------------------------------------------===//
1298// ASTWriter Implementation
1299//===----------------------------------------------------------------------===//
1300
1301void ASTWriter::WriteDeclsBlockAbbrevs() {
1302  using namespace llvm;
1303
1304  BitCodeAbbrev *Abv;
1305
1306  // Abbreviation for DECL_FIELD
1307  Abv = new BitCodeAbbrev();
1308  Abv->Add(BitCodeAbbrevOp(serialization::DECL_FIELD));
1309  // Decl
1310  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1311  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1312  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1313  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1314  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1315  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1316  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1317  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1318  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2));  // AccessSpecifier
1319  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1320  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1321  // NamedDecl
1322  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1323  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1324  // ValueDecl
1325  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1326  // DeclaratorDecl
1327  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1328  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1329  // FieldDecl
1330  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
1331  Abv->Add(BitCodeAbbrevOp(0));                       //getBitWidth
1332  // Type Source Info
1333  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1334  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1335  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1336  DeclFieldAbbrev = Stream.EmitAbbrev(Abv);
1337
1338  // Abbreviation for DECL_OBJC_IVAR
1339  Abv = new BitCodeAbbrev();
1340  Abv->Add(BitCodeAbbrevOp(serialization::DECL_OBJC_IVAR));
1341  // Decl
1342  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1343  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1344  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1345  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1346  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1347  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1348  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1349  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1350  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2));  // AccessSpecifier
1351  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1352  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1353  // NamedDecl
1354  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1355  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1356  // ValueDecl
1357  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1358  // DeclaratorDecl
1359  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1360  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1361  // FieldDecl
1362  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
1363  Abv->Add(BitCodeAbbrevOp(0));                       //getBitWidth
1364  // ObjC Ivar
1365  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getAccessControl
1366  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getSynthesize
1367  // Type Source Info
1368  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1369  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1370  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1371  DeclObjCIvarAbbrev = Stream.EmitAbbrev(Abv);
1372
1373  // Abbreviation for DECL_ENUM
1374  Abv = new BitCodeAbbrev();
1375  Abv->Add(BitCodeAbbrevOp(serialization::DECL_ENUM));
1376  // Redeclarable
1377  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1378  // Decl
1379  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1380  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1381  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1382  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1383  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1384  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1385  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1386  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1387  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1388  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1389  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1390  // NamedDecl
1391  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1392  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1393  // TypeDecl
1394  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1395  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1396  // TagDecl
1397  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IdentifierNamespace
1398  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getTagKind
1399  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCompleteDefinition
1400  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // EmbeddedInDeclarator
1401  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFreeStanding
1402  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // SourceLocation
1403  Abv->Add(BitCodeAbbrevOp(0));                         // hasExtInfo
1404  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // TypedefNameAnonDecl
1405  // EnumDecl
1406  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // AddTypeRef
1407  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IntegerType
1408  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getPromotionType
1409  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getNumPositiveBits
1410  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getNumNegativeBits
1411  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isScoped
1412  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isScopedUsingClassTag
1413  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isFixed
1414  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // InstantiatedMembEnum
1415  // DC
1416  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // LexicalOffset
1417  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // VisibleOffset
1418  DeclEnumAbbrev = Stream.EmitAbbrev(Abv);
1419
1420  // Abbreviation for DECL_RECORD
1421  Abv = new BitCodeAbbrev();
1422  Abv->Add(BitCodeAbbrevOp(serialization::DECL_RECORD));
1423  // Redeclarable
1424  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1425  // Decl
1426  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1427  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1428  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1429  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1430  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1431  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1432  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1433  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1434  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1435  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1436  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1437  // NamedDecl
1438  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1439  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1440  // TypeDecl
1441  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1442  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1443  // TagDecl
1444  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IdentifierNamespace
1445  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getTagKind
1446  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCompleteDefinition
1447  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // EmbeddedInDeclarator
1448  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFreeStanding
1449  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // SourceLocation
1450  Abv->Add(BitCodeAbbrevOp(0));                         // hasExtInfo
1451  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // TypedefNameAnonDecl
1452  // RecordDecl
1453  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // FlexibleArrayMember
1454  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // AnonymousStructUnion
1455  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // hasObjectMember
1456  // DC
1457  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // LexicalOffset
1458  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // VisibleOffset
1459  DeclRecordAbbrev = Stream.EmitAbbrev(Abv);
1460
1461  // Abbreviation for DECL_PARM_VAR
1462  Abv = new BitCodeAbbrev();
1463  Abv->Add(BitCodeAbbrevOp(serialization::DECL_PARM_VAR));
1464  // Redeclarable
1465  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1466  // Decl
1467  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1468  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1469  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1470  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1471  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1472  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1473  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1474  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1475  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1476  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1477  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1478  // NamedDecl
1479  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1480  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1481  // ValueDecl
1482  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1483  // DeclaratorDecl
1484  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1485  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1486  // VarDecl
1487  Abv->Add(BitCodeAbbrevOp(0));                       // StorageClass
1488  Abv->Add(BitCodeAbbrevOp(0));                       // StorageClassAsWritten
1489  Abv->Add(BitCodeAbbrevOp(0));                       // isThreadSpecified
1490  Abv->Add(BitCodeAbbrevOp(0));                       // hasCXXDirectInitializer
1491  Abv->Add(BitCodeAbbrevOp(0));                       // isExceptionVariable
1492  Abv->Add(BitCodeAbbrevOp(0));                       // isNRVOVariable
1493  Abv->Add(BitCodeAbbrevOp(0));                       // isCXXForRangeDecl
1494  Abv->Add(BitCodeAbbrevOp(0));                       // isARCPseudoStrong
1495  Abv->Add(BitCodeAbbrevOp(0));                       // isConstexpr
1496  Abv->Add(BitCodeAbbrevOp(0));                       // HasInit
1497  Abv->Add(BitCodeAbbrevOp(0));                   // HasMemberSpecializationInfo
1498  // ParmVarDecl
1499  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsObjCMethodParameter
1500  Abv->Add(BitCodeAbbrevOp(0));                       // ScopeDepth
1501  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ScopeIndex
1502  Abv->Add(BitCodeAbbrevOp(0));                       // ObjCDeclQualifier
1503  Abv->Add(BitCodeAbbrevOp(0));                       // KNRPromoted
1504  Abv->Add(BitCodeAbbrevOp(0));                       // HasInheritedDefaultArg
1505  Abv->Add(BitCodeAbbrevOp(0));                   // HasUninstantiatedDefaultArg
1506  // Type Source Info
1507  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1508  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1509  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1510  DeclParmVarAbbrev = Stream.EmitAbbrev(Abv);
1511
1512  // Abbreviation for DECL_TYPEDEF
1513  Abv = new BitCodeAbbrev();
1514  Abv->Add(BitCodeAbbrevOp(serialization::DECL_TYPEDEF));
1515  // Redeclarable
1516  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1517  // Decl
1518  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1519  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1520  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1521  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1522  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1523  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1524  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1525  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1526  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1527  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1528  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1529  // NamedDecl
1530  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1531  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1532  // TypeDecl
1533  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1534  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1535  // TypedefDecl
1536  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1537  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1538  DeclTypedefAbbrev = Stream.EmitAbbrev(Abv);
1539
1540  // Abbreviation for DECL_VAR
1541  Abv = new BitCodeAbbrev();
1542  Abv->Add(BitCodeAbbrevOp(serialization::DECL_VAR));
1543  // Redeclarable
1544  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1545  // Decl
1546  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1547  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1548  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1549  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1550  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1551  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1552  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1553  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1554  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1555  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1556  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1557  // NamedDecl
1558  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1559  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1560  // ValueDecl
1561  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1562  // DeclaratorDecl
1563  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1564  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1565  // VarDecl
1566  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // StorageClass
1567  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // StorageClassAsWritten
1568  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isThreadSpecified
1569  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // CXXDirectInitializer
1570  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isExceptionVariable
1571  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isNRVOVariable
1572  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCXXForRangeDecl
1573  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isARCPseudoStrong
1574  Abv->Add(BitCodeAbbrevOp(0));                         // isConstexpr
1575  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // HasInit
1576  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // HasMemberSpecInfo
1577  // Type Source Info
1578  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1579  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1580  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1581  DeclVarAbbrev = Stream.EmitAbbrev(Abv);
1582
1583  // Abbreviation for EXPR_DECL_REF
1584  Abv = new BitCodeAbbrev();
1585  Abv->Add(BitCodeAbbrevOp(serialization::EXPR_DECL_REF));
1586  //Stmt
1587  //Expr
1588  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1589  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1590  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1591  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1592  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1593  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1594  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1595  //DeclRefExpr
1596  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //HasQualifier
1597  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //GetDeclFound
1598  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ExplicitTemplateArgs
1599  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //HadMultipleCandidates
1600  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //RefersToEnclosingLocal
1601  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclRef
1602  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1603  DeclRefExprAbbrev = Stream.EmitAbbrev(Abv);
1604
1605  // Abbreviation for EXPR_INTEGER_LITERAL
1606  Abv = new BitCodeAbbrev();
1607  Abv->Add(BitCodeAbbrevOp(serialization::EXPR_INTEGER_LITERAL));
1608  //Stmt
1609  //Expr
1610  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1611  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1612  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1613  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1614  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1615  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1616  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1617  //Integer Literal
1618  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1619  Abv->Add(BitCodeAbbrevOp(32));                      // Bit Width
1620  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Value
1621  IntegerLiteralAbbrev = Stream.EmitAbbrev(Abv);
1622
1623  // Abbreviation for EXPR_CHARACTER_LITERAL
1624  Abv = new BitCodeAbbrev();
1625  Abv->Add(BitCodeAbbrevOp(serialization::EXPR_CHARACTER_LITERAL));
1626  //Stmt
1627  //Expr
1628  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1629  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1630  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1631  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1632  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1633  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1634  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1635  //Character Literal
1636  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getValue
1637  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1638  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // getKind
1639  CharacterLiteralAbbrev = Stream.EmitAbbrev(Abv);
1640
1641  Abv = new BitCodeAbbrev();
1642  Abv->Add(BitCodeAbbrevOp(serialization::DECL_CONTEXT_LEXICAL));
1643  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
1644  DeclContextLexicalAbbrev = Stream.EmitAbbrev(Abv);
1645
1646  Abv = new BitCodeAbbrev();
1647  Abv->Add(BitCodeAbbrevOp(serialization::DECL_CONTEXT_VISIBLE));
1648  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
1649  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
1650  DeclContextVisibleLookupAbbrev = Stream.EmitAbbrev(Abv);
1651}
1652
1653/// isRequiredDecl - Check if this is a "required" Decl, which must be seen by
1654/// consumers of the AST.
1655///
1656/// Such decls will always be deserialized from the AST file, so we would like
1657/// this to be as restrictive as possible. Currently the predicate is driven by
1658/// code generation requirements, if other clients have a different notion of
1659/// what is "required" then we may have to consider an alternate scheme where
1660/// clients can iterate over the top-level decls and get information on them,
1661/// without necessary deserializing them. We could explicitly require such
1662/// clients to use a separate API call to "realize" the decl. This should be
1663/// relatively painless since they would presumably only do it for top-level
1664/// decls.
1665static bool isRequiredDecl(const Decl *D, ASTContext &Context) {
1666  // An ObjCMethodDecl is never considered as "required" because its
1667  // implementation container always is.
1668
1669  // File scoped assembly or obj-c implementation must be seen.
1670  if (isa<FileScopeAsmDecl>(D) || isa<ObjCImplDecl>(D))
1671    return true;
1672
1673  return Context.DeclMustBeEmitted(D);
1674}
1675
1676void ASTWriter::WriteDecl(ASTContext &Context, Decl *D) {
1677  // Switch case IDs are per Decl.
1678  ClearSwitchCaseIDs();
1679
1680  RecordData Record;
1681  ASTDeclWriter W(*this, Context, Record);
1682
1683  // Determine the ID for this declaration.
1684  serialization::DeclID ID;
1685  if (D->isFromASTFile())
1686    ID = getDeclID(D);
1687  else {
1688    serialization::DeclID &IDR = DeclIDs[D];
1689    if (IDR == 0)
1690      IDR = NextDeclID++;
1691
1692    ID= IDR;
1693  }
1694
1695  bool isReplacingADecl = ID < FirstDeclID;
1696
1697  // If this declaration is also a DeclContext, write blocks for the
1698  // declarations that lexically stored inside its context and those
1699  // declarations that are visible from its context. These blocks
1700  // are written before the declaration itself so that we can put
1701  // their offsets into the record for the declaration.
1702  uint64_t LexicalOffset = 0;
1703  uint64_t VisibleOffset = 0;
1704  DeclContext *DC = dyn_cast<DeclContext>(D);
1705  if (DC) {
1706    if (isReplacingADecl) {
1707      // It is replacing a decl from a chained PCH; make sure that the
1708      // DeclContext is fully loaded.
1709      if (DC->hasExternalLexicalStorage())
1710        DC->LoadLexicalDeclsFromExternalStorage();
1711      if (DC->hasExternalVisibleStorage())
1712        Chain->completeVisibleDeclsMap(DC);
1713    }
1714    LexicalOffset = WriteDeclContextLexicalBlock(Context, DC);
1715    VisibleOffset = WriteDeclContextVisibleBlock(Context, DC);
1716  }
1717
1718  if (isReplacingADecl) {
1719    // We're replacing a decl in a previous file.
1720    ReplacedDecls.push_back(ReplacedDeclInfo(ID, Stream.GetCurrentBitNo(),
1721                                             D->getLocation()));
1722  } else {
1723    unsigned Index = ID - FirstDeclID;
1724
1725    // Record the offset for this declaration
1726    SourceLocation Loc = D->getLocation();
1727    if (DeclOffsets.size() == Index)
1728      DeclOffsets.push_back(DeclOffset(Loc, Stream.GetCurrentBitNo()));
1729    else if (DeclOffsets.size() < Index) {
1730      DeclOffsets.resize(Index+1);
1731      DeclOffsets[Index].setLocation(Loc);
1732      DeclOffsets[Index].BitOffset = Stream.GetCurrentBitNo();
1733    }
1734
1735    SourceManager &SM = Context.getSourceManager();
1736    if (Loc.isValid() && SM.isLocalSourceLocation(Loc))
1737      associateDeclWithFile(D, ID);
1738  }
1739
1740  // Build and emit a record for this declaration
1741  Record.clear();
1742  W.Code = (serialization::DeclCode)0;
1743  W.AbbrevToUse = 0;
1744  W.Visit(D);
1745  if (DC) W.VisitDeclContext(DC, LexicalOffset, VisibleOffset);
1746
1747  if (!W.Code)
1748    llvm::report_fatal_error(StringRef("unexpected declaration kind '") +
1749                            D->getDeclKindName() + "'");
1750  Stream.EmitRecord(W.Code, Record, W.AbbrevToUse);
1751
1752  // Flush any expressions that were written as part of this declaration.
1753  FlushStmts();
1754
1755  // Flush C++ base specifiers, if there are any.
1756  FlushCXXBaseSpecifiers();
1757
1758  // Note "external" declarations so that we can add them to a record in the
1759  // AST file later.
1760  //
1761  // FIXME: This should be renamed, the predicate is much more complicated.
1762  if (isRequiredDecl(D, Context))
1763    ExternalDefinitions.push_back(ID);
1764}
1765