ASTWriterDecl.cpp revision 5e2a1ff9f28d2eab256d2553e76a9c9d54693875 
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"
25using namespace clang;
26using namespace serialization;
27
28//===----------------------------------------------------------------------===//
29// Declaration serialization
30//===----------------------------------------------------------------------===//
31
32namespace 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 VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *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(D->getAttrs(), Record);
155  Record.push_back(D->isImplicit());
156  Record.push_back(D->isUsed(false));
157  Record.push_back(D->isReferenced());
158  Record.push_back(D->TopLevelDeclInObjCContainer);
159  Record.push_back(D->getAccess());
160  Record.push_back(D->ModulePrivate);
161  Record.push_back(Writer.inferSubmoduleIDFromLocation(D->getLocation()));
162}
163
164void ASTDeclWriter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
165  llvm_unreachable("Translation units aren't directly serialized");
166}
167
168void ASTDeclWriter::VisitNamedDecl(NamedDecl *D) {
169  VisitDecl(D);
170  Writer.AddDeclarationName(D->getDeclName(), Record);
171}
172
173void ASTDeclWriter::VisitTypeDecl(TypeDecl *D) {
174  VisitNamedDecl(D);
175  Writer.AddSourceLocation(D->getLocStart(), Record);
176  Writer.AddTypeRef(QualType(D->getTypeForDecl(), 0), Record);
177}
178
179void ASTDeclWriter::VisitTypedefNameDecl(TypedefNameDecl *D) {
180  VisitRedeclarable(D);
181  VisitTypeDecl(D);
182  Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
183}
184
185void ASTDeclWriter::VisitTypedefDecl(TypedefDecl *D) {
186  VisitTypedefNameDecl(D);
187  if (!D->hasAttrs() &&
188      !D->isImplicit() &&
189      !D->isUsed(false) &&
190      !D->getPreviousDeclaration() &&
191      !D->isInvalidDecl() &&
192      !D->isReferenced() &&
193      !D->isTopLevelDeclInObjCContainer() &&
194      D->getAccess() == AS_none &&
195      !D->isModulePrivate() &&
196      D->getDeclName().getNameKind() == DeclarationName::Identifier)
197    AbbrevToUse = Writer.getDeclTypedefAbbrev();
198
199  Code = serialization::DECL_TYPEDEF;
200}
201
202void ASTDeclWriter::VisitTypeAliasDecl(TypeAliasDecl *D) {
203  VisitTypedefNameDecl(D);
204  Code = serialization::DECL_TYPEALIAS;
205}
206
207void ASTDeclWriter::VisitTagDecl(TagDecl *D) {
208  VisitRedeclarable(D);
209  VisitTypeDecl(D);
210  Record.push_back(D->getIdentifierNamespace());
211  Record.push_back((unsigned)D->getTagKind()); // FIXME: stable encoding
212  Record.push_back(D->isCompleteDefinition());
213  Record.push_back(D->isEmbeddedInDeclarator());
214  Record.push_back(D->isFreeStanding());
215  Writer.AddSourceLocation(D->getRBraceLoc(), Record);
216  Record.push_back(D->hasExtInfo());
217  if (D->hasExtInfo())
218    Writer.AddQualifierInfo(*D->getExtInfo(), Record);
219  else
220    Writer.AddDeclRef(D->getTypedefNameForAnonDecl(), Record);
221}
222
223void ASTDeclWriter::VisitEnumDecl(EnumDecl *D) {
224  VisitTagDecl(D);
225  Writer.AddTypeSourceInfo(D->getIntegerTypeSourceInfo(), Record);
226  if (!D->getIntegerTypeSourceInfo())
227    Writer.AddTypeRef(D->getIntegerType(), Record);
228  Writer.AddTypeRef(D->getPromotionType(), Record);
229  Record.push_back(D->getNumPositiveBits());
230  Record.push_back(D->getNumNegativeBits());
231  Record.push_back(D->isScoped());
232  Record.push_back(D->isScopedUsingClassTag());
233  Record.push_back(D->isFixed());
234  Writer.AddDeclRef(D->getInstantiatedFromMemberEnum(), Record);
235
236  if (!D->hasAttrs() &&
237      !D->isImplicit() &&
238      !D->isUsed(false) &&
239      !D->hasExtInfo() &&
240      !D->getPreviousDeclaration() &&
241      !D->isInvalidDecl() &&
242      !D->isReferenced() &&
243      !D->isTopLevelDeclInObjCContainer() &&
244      D->getAccess() == AS_none &&
245      !D->isModulePrivate() &&
246      !CXXRecordDecl::classofKind(D->getKind()) &&
247      !D->getIntegerTypeSourceInfo() &&
248      D->getDeclName().getNameKind() == DeclarationName::Identifier)
249    AbbrevToUse = Writer.getDeclEnumAbbrev();
250
251  Code = serialization::DECL_ENUM;
252}
253
254void ASTDeclWriter::VisitRecordDecl(RecordDecl *D) {
255  VisitTagDecl(D);
256  Record.push_back(D->hasFlexibleArrayMember());
257  Record.push_back(D->isAnonymousStructOrUnion());
258  Record.push_back(D->hasObjectMember());
259
260  if (!D->hasAttrs() &&
261      !D->isImplicit() &&
262      !D->isUsed(false) &&
263      !D->hasExtInfo() &&
264      !D->getPreviousDeclaration() &&
265      !D->isInvalidDecl() &&
266      !D->isReferenced() &&
267      !D->isTopLevelDeclInObjCContainer() &&
268      D->getAccess() == AS_none &&
269      !D->isModulePrivate() &&
270      !CXXRecordDecl::classofKind(D->getKind()) &&
271      D->getDeclName().getNameKind() == DeclarationName::Identifier)
272    AbbrevToUse = Writer.getDeclRecordAbbrev();
273
274  Code = serialization::DECL_RECORD;
275}
276
277void ASTDeclWriter::VisitValueDecl(ValueDecl *D) {
278  VisitNamedDecl(D);
279  Writer.AddTypeRef(D->getType(), Record);
280}
281
282void ASTDeclWriter::VisitEnumConstantDecl(EnumConstantDecl *D) {
283  VisitValueDecl(D);
284  Record.push_back(D->getInitExpr()? 1 : 0);
285  if (D->getInitExpr())
286    Writer.AddStmt(D->getInitExpr());
287  Writer.AddAPSInt(D->getInitVal(), Record);
288
289  Code = serialization::DECL_ENUM_CONSTANT;
290}
291
292void ASTDeclWriter::VisitDeclaratorDecl(DeclaratorDecl *D) {
293  VisitValueDecl(D);
294  Writer.AddSourceLocation(D->getInnerLocStart(), Record);
295  Record.push_back(D->hasExtInfo());
296  if (D->hasExtInfo())
297    Writer.AddQualifierInfo(*D->getExtInfo(), Record);
298}
299
300void ASTDeclWriter::VisitFunctionDecl(FunctionDecl *D) {
301  VisitRedeclarable(D);
302  VisitDeclaratorDecl(D);
303
304  Writer.AddDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record);
305  Record.push_back(D->getIdentifierNamespace());
306  Record.push_back(D->getTemplatedKind());
307  switch (D->getTemplatedKind()) {
308  default: llvm_unreachable("Unhandled TemplatedKind!");
309  case FunctionDecl::TK_NonTemplate:
310    break;
311  case FunctionDecl::TK_FunctionTemplate:
312    Writer.AddDeclRef(D->getDescribedFunctionTemplate(), Record);
313    break;
314  case FunctionDecl::TK_MemberSpecialization: {
315    MemberSpecializationInfo *MemberInfo = D->getMemberSpecializationInfo();
316    Writer.AddDeclRef(MemberInfo->getInstantiatedFrom(), Record);
317    Record.push_back(MemberInfo->getTemplateSpecializationKind());
318    Writer.AddSourceLocation(MemberInfo->getPointOfInstantiation(), Record);
319    break;
320  }
321  case FunctionDecl::TK_FunctionTemplateSpecialization: {
322    FunctionTemplateSpecializationInfo *
323      FTSInfo = D->getTemplateSpecializationInfo();
324    Writer.AddDeclRef(FTSInfo->getTemplate(), Record);
325    Record.push_back(FTSInfo->getTemplateSpecializationKind());
326
327    // Template arguments.
328    Writer.AddTemplateArgumentList(FTSInfo->TemplateArguments, Record);
329
330    // Template args as written.
331    Record.push_back(FTSInfo->TemplateArgumentsAsWritten != 0);
332    if (FTSInfo->TemplateArgumentsAsWritten) {
333      Record.push_back(FTSInfo->TemplateArgumentsAsWritten->NumTemplateArgs);
334      for (int i=0, e = FTSInfo->TemplateArgumentsAsWritten->NumTemplateArgs;
335             i!=e; ++i)
336        Writer.AddTemplateArgumentLoc((*FTSInfo->TemplateArgumentsAsWritten)[i],
337                                      Record);
338      Writer.AddSourceLocation(FTSInfo->TemplateArgumentsAsWritten->LAngleLoc,
339                               Record);
340      Writer.AddSourceLocation(FTSInfo->TemplateArgumentsAsWritten->RAngleLoc,
341                               Record);
342    }
343
344    Writer.AddSourceLocation(FTSInfo->getPointOfInstantiation(), Record);
345
346    if (D->isCanonicalDecl()) {
347      // Write the template that contains the specializations set. We will
348      // add a FunctionTemplateSpecializationInfo to it when reading.
349      Writer.AddDeclRef(FTSInfo->getTemplate()->getCanonicalDecl(), Record);
350    }
351    break;
352  }
353  case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
354    DependentFunctionTemplateSpecializationInfo *
355      DFTSInfo = D->getDependentSpecializationInfo();
356
357    // Templates.
358    Record.push_back(DFTSInfo->getNumTemplates());
359    for (int i=0, e = DFTSInfo->getNumTemplates(); i != e; ++i)
360      Writer.AddDeclRef(DFTSInfo->getTemplate(i), Record);
361
362    // Templates args.
363    Record.push_back(DFTSInfo->getNumTemplateArgs());
364    for (int i=0, e = DFTSInfo->getNumTemplateArgs(); i != e; ++i)
365      Writer.AddTemplateArgumentLoc(DFTSInfo->getTemplateArg(i), Record);
366    Writer.AddSourceLocation(DFTSInfo->getLAngleLoc(), Record);
367    Writer.AddSourceLocation(DFTSInfo->getRAngleLoc(), Record);
368    break;
369  }
370  }
371
372  // FunctionDecl's body is handled last at ASTWriterDecl::Visit,
373  // after everything else is written.
374
375  Record.push_back(D->getStorageClass()); // FIXME: stable encoding
376  Record.push_back(D->getStorageClassAsWritten());
377  Record.push_back(D->IsInline);
378  Record.push_back(D->isInlineSpecified());
379  Record.push_back(D->isVirtualAsWritten());
380  Record.push_back(D->isPure());
381  Record.push_back(D->hasInheritedPrototype());
382  Record.push_back(D->hasWrittenPrototype());
383  Record.push_back(D->isDeletedAsWritten());
384  Record.push_back(D->isTrivial());
385  Record.push_back(D->isDefaulted());
386  Record.push_back(D->isExplicitlyDefaulted());
387  Record.push_back(D->hasImplicitReturnZero());
388  Record.push_back(D->isConstexpr());
389  Writer.AddSourceLocation(D->getLocEnd(), Record);
390
391  Record.push_back(D->param_size());
392  for (FunctionDecl::param_iterator P = D->param_begin(), PEnd = D->param_end();
393       P != PEnd; ++P)
394    Writer.AddDeclRef(*P, Record);
395  Code = serialization::DECL_FUNCTION;
396}
397
398void ASTDeclWriter::VisitObjCMethodDecl(ObjCMethodDecl *D) {
399  VisitNamedDecl(D);
400  // FIXME: convert to LazyStmtPtr?
401  // Unlike C/C++, method bodies will never be in header files.
402  bool HasBodyStuff = D->getBody() != 0     ||
403                      D->getSelfDecl() != 0 || D->getCmdDecl() != 0;
404  Record.push_back(HasBodyStuff);
405  if (HasBodyStuff) {
406    Writer.AddStmt(D->getBody());
407    Writer.AddDeclRef(D->getSelfDecl(), Record);
408    Writer.AddDeclRef(D->getCmdDecl(), Record);
409  }
410  Record.push_back(D->isInstanceMethod());
411  Record.push_back(D->isVariadic());
412  Record.push_back(D->isSynthesized());
413  Record.push_back(D->isDefined());
414
415  Record.push_back(D->IsRedeclaration);
416  Record.push_back(D->HasRedeclaration);
417  if (D->HasRedeclaration) {
418    assert(Context.getObjCMethodRedeclaration(D));
419    Writer.AddDeclRef(Context.getObjCMethodRedeclaration(D), Record);
420  }
421
422  // FIXME: stable encoding for @required/@optional
423  Record.push_back(D->getImplementationControl());
424  // FIXME: stable encoding for in/out/inout/bycopy/byref/oneway
425  Record.push_back(D->getObjCDeclQualifier());
426  Record.push_back(D->hasRelatedResultType());
427  Writer.AddTypeRef(D->getResultType(), Record);
428  Writer.AddTypeSourceInfo(D->getResultTypeSourceInfo(), Record);
429  Writer.AddSourceLocation(D->getLocEnd(), Record);
430  Record.push_back(D->param_size());
431  for (ObjCMethodDecl::param_iterator P = D->param_begin(),
432                                   PEnd = D->param_end(); P != PEnd; ++P)
433    Writer.AddDeclRef(*P, Record);
434
435  Record.push_back(D->SelLocsKind);
436  unsigned NumStoredSelLocs = D->getNumStoredSelLocs();
437  SourceLocation *SelLocs = D->getStoredSelLocs();
438  Record.push_back(NumStoredSelLocs);
439  for (unsigned i = 0; i != NumStoredSelLocs; ++i)
440    Writer.AddSourceLocation(SelLocs[i], Record);
441
442  Code = serialization::DECL_OBJC_METHOD;
443}
444
445void ASTDeclWriter::VisitObjCContainerDecl(ObjCContainerDecl *D) {
446  VisitNamedDecl(D);
447  Writer.AddSourceLocation(D->getAtStartLoc(), Record);
448  Writer.AddSourceRange(D->getAtEndRange(), Record);
449  // Abstract class (no need to define a stable serialization::DECL code).
450}
451
452void ASTDeclWriter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *D) {
453  VisitRedeclarable(D);
454  VisitObjCContainerDecl(D);
455  Writer.AddTypeRef(QualType(D->getTypeForDecl(), 0), Record);
456
457  ObjCInterfaceDecl *Def = D->getDefinition();
458  Writer.AddDeclRef(Def, Record);
459
460  if (D == Def) {
461    // Write the DefinitionData
462    ObjCInterfaceDecl::DefinitionData &Data = D->data();
463
464    Writer.AddDeclRef(D->getSuperClass(), Record);
465    Writer.AddSourceLocation(D->getSuperClassLoc(), Record);
466    Writer.AddSourceLocation(D->getEndOfDefinitionLoc(), Record);
467
468    // Write out the protocols that are directly referenced by the @interface.
469    Record.push_back(Data.ReferencedProtocols.size());
470    for (ObjCInterfaceDecl::protocol_iterator P = D->protocol_begin(),
471                                           PEnd = D->protocol_end();
472         P != PEnd; ++P)
473      Writer.AddDeclRef(*P, Record);
474    for (ObjCInterfaceDecl::protocol_loc_iterator PL = D->protocol_loc_begin(),
475         PLEnd = D->protocol_loc_end();
476         PL != PLEnd; ++PL)
477      Writer.AddSourceLocation(*PL, Record);
478
479    // Write out the protocols that are transitively referenced.
480    Record.push_back(Data.AllReferencedProtocols.size());
481    for (ObjCList<ObjCProtocolDecl>::iterator
482              P = Data.AllReferencedProtocols.begin(),
483           PEnd = Data.AllReferencedProtocols.end();
484         P != PEnd; ++P)
485      Writer.AddDeclRef(*P, Record);
486
487    // Write out the ivars.
488    Record.push_back(D->ivar_size());
489    for (ObjCInterfaceDecl::ivar_iterator I = D->ivar_begin(),
490                                       IEnd = D->ivar_end(); I != IEnd; ++I)
491      Writer.AddDeclRef(*I, Record);
492
493    Writer.AddDeclRef(D->getCategoryList(), Record);
494  }
495
496  Code = serialization::DECL_OBJC_INTERFACE;
497}
498
499void ASTDeclWriter::VisitObjCIvarDecl(ObjCIvarDecl *D) {
500  VisitFieldDecl(D);
501  // FIXME: stable encoding for @public/@private/@protected/@package
502  Record.push_back(D->getAccessControl());
503  Record.push_back(D->getSynthesize());
504
505  if (!D->hasAttrs() &&
506      !D->isImplicit() &&
507      !D->isUsed(false) &&
508      !D->isInvalidDecl() &&
509      !D->isReferenced() &&
510      !D->isModulePrivate() &&
511      !D->getBitWidth() &&
512      !D->hasExtInfo() &&
513      D->getDeclName())
514    AbbrevToUse = Writer.getDeclObjCIvarAbbrev();
515
516  Code = serialization::DECL_OBJC_IVAR;
517}
518
519void ASTDeclWriter::VisitObjCProtocolDecl(ObjCProtocolDecl *D) {
520  VisitObjCContainerDecl(D);
521  Record.push_back(D->isInitiallyForwardDecl());
522  Record.push_back(D->isForwardProtoDecl);
523  Writer.AddSourceLocation(D->getLocEnd(), Record);
524
525  ObjCProtocolDecl *Def = D->getDefinition();
526  Writer.AddDeclRef(Def, Record);
527
528  if (D == Def) {
529    Record.push_back(D->protocol_size());
530    for (ObjCProtocolDecl::protocol_iterator
531         I = D->protocol_begin(), IEnd = D->protocol_end(); I != IEnd; ++I)
532      Writer.AddDeclRef(*I, Record);
533    for (ObjCProtocolDecl::protocol_loc_iterator PL = D->protocol_loc_begin(),
534           PLEnd = D->protocol_loc_end();
535         PL != PLEnd; ++PL)
536      Writer.AddSourceLocation(*PL, Record);
537  }
538
539  Code = serialization::DECL_OBJC_PROTOCOL;
540}
541
542void ASTDeclWriter::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D) {
543  VisitFieldDecl(D);
544  Code = serialization::DECL_OBJC_AT_DEFS_FIELD;
545}
546
547void ASTDeclWriter::VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D) {
548  VisitDecl(D);
549  Record.push_back(D->protocol_size());
550  for (ObjCForwardProtocolDecl::protocol_iterator
551       I = D->protocol_begin(), IEnd = D->protocol_end(); I != IEnd; ++I)
552    Writer.AddDeclRef(*I, Record);
553  for (ObjCForwardProtocolDecl::protocol_loc_iterator
554         PL = D->protocol_loc_begin(), PLEnd = D->protocol_loc_end();
555       PL != PLEnd; ++PL)
556    Writer.AddSourceLocation(*PL, Record);
557  Code = serialization::DECL_OBJC_FORWARD_PROTOCOL;
558}
559
560void ASTDeclWriter::VisitObjCCategoryDecl(ObjCCategoryDecl *D) {
561  VisitObjCContainerDecl(D);
562  Writer.AddDeclRef(D->getClassInterface(), Record);
563  Record.push_back(D->protocol_size());
564  for (ObjCCategoryDecl::protocol_iterator
565       I = D->protocol_begin(), IEnd = D->protocol_end(); I != IEnd; ++I)
566    Writer.AddDeclRef(*I, Record);
567  for (ObjCCategoryDecl::protocol_loc_iterator
568         PL = D->protocol_loc_begin(), PLEnd = D->protocol_loc_end();
569       PL != PLEnd; ++PL)
570    Writer.AddSourceLocation(*PL, Record);
571  Writer.AddDeclRef(D->getNextClassCategory(), Record);
572  Record.push_back(D->hasSynthBitfield());
573  Writer.AddSourceLocation(D->getCategoryNameLoc(), Record);
574  Code = serialization::DECL_OBJC_CATEGORY;
575}
576
577void ASTDeclWriter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D) {
578  VisitNamedDecl(D);
579  Writer.AddDeclRef(D->getClassInterface(), Record);
580  Code = serialization::DECL_OBJC_COMPATIBLE_ALIAS;
581}
582
583void ASTDeclWriter::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
584  VisitNamedDecl(D);
585  Writer.AddSourceLocation(D->getAtLoc(), Record);
586  Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
587  // FIXME: stable encoding
588  Record.push_back((unsigned)D->getPropertyAttributes());
589  Record.push_back((unsigned)D->getPropertyAttributesAsWritten());
590  // FIXME: stable encoding
591  Record.push_back((unsigned)D->getPropertyImplementation());
592  Writer.AddDeclarationName(D->getGetterName(), Record);
593  Writer.AddDeclarationName(D->getSetterName(), Record);
594  Writer.AddDeclRef(D->getGetterMethodDecl(), Record);
595  Writer.AddDeclRef(D->getSetterMethodDecl(), Record);
596  Writer.AddDeclRef(D->getPropertyIvarDecl(), Record);
597  Code = serialization::DECL_OBJC_PROPERTY;
598}
599
600void ASTDeclWriter::VisitObjCImplDecl(ObjCImplDecl *D) {
601  VisitObjCContainerDecl(D);
602  Writer.AddDeclRef(D->getClassInterface(), Record);
603  // Abstract class (no need to define a stable serialization::DECL code).
604}
605
606void ASTDeclWriter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
607  VisitObjCImplDecl(D);
608  Writer.AddIdentifierRef(D->getIdentifier(), Record);
609  Writer.AddSourceLocation(D->getCategoryNameLoc(), Record);
610  Code = serialization::DECL_OBJC_CATEGORY_IMPL;
611}
612
613void ASTDeclWriter::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
614  VisitObjCImplDecl(D);
615  Writer.AddDeclRef(D->getSuperClass(), Record);
616  Writer.AddCXXCtorInitializers(D->IvarInitializers, D->NumIvarInitializers,
617                                Record);
618  Record.push_back(D->hasSynthBitfield());
619  Code = serialization::DECL_OBJC_IMPLEMENTATION;
620}
621
622void ASTDeclWriter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
623  VisitDecl(D);
624  Writer.AddSourceLocation(D->getLocStart(), Record);
625  Writer.AddDeclRef(D->getPropertyDecl(), Record);
626  Writer.AddDeclRef(D->getPropertyIvarDecl(), Record);
627  Writer.AddSourceLocation(D->getPropertyIvarDeclLoc(), Record);
628  Writer.AddStmt(D->getGetterCXXConstructor());
629  Writer.AddStmt(D->getSetterCXXAssignment());
630  Code = serialization::DECL_OBJC_PROPERTY_IMPL;
631}
632
633void ASTDeclWriter::VisitFieldDecl(FieldDecl *D) {
634  VisitDeclaratorDecl(D);
635  Record.push_back(D->isMutable());
636  Record.push_back(D->getBitWidth()? 1 : D->hasInClassInitializer() ? 2 : 0);
637  if (D->getBitWidth())
638    Writer.AddStmt(D->getBitWidth());
639  else if (D->hasInClassInitializer())
640    Writer.AddStmt(D->getInClassInitializer());
641  if (!D->getDeclName())
642    Writer.AddDeclRef(Context.getInstantiatedFromUnnamedFieldDecl(D), Record);
643
644  if (!D->hasAttrs() &&
645      !D->isImplicit() &&
646      !D->isUsed(false) &&
647      !D->isInvalidDecl() &&
648      !D->isReferenced() &&
649      !D->isTopLevelDeclInObjCContainer() &&
650      !D->isModulePrivate() &&
651      !D->getBitWidth() &&
652      !D->hasInClassInitializer() &&
653      !D->hasExtInfo() &&
654      !ObjCIvarDecl::classofKind(D->getKind()) &&
655      !ObjCAtDefsFieldDecl::classofKind(D->getKind()) &&
656      D->getDeclName())
657    AbbrevToUse = Writer.getDeclFieldAbbrev();
658
659  Code = serialization::DECL_FIELD;
660}
661
662void ASTDeclWriter::VisitIndirectFieldDecl(IndirectFieldDecl *D) {
663  VisitValueDecl(D);
664  Record.push_back(D->getChainingSize());
665
666  for (IndirectFieldDecl::chain_iterator
667       P = D->chain_begin(),
668       PEnd = D->chain_end(); P != PEnd; ++P)
669    Writer.AddDeclRef(*P, Record);
670  Code = serialization::DECL_INDIRECTFIELD;
671}
672
673void ASTDeclWriter::VisitVarDecl(VarDecl *D) {
674  VisitRedeclarable(D);
675  VisitDeclaratorDecl(D);
676  Record.push_back(D->getStorageClass()); // FIXME: stable encoding
677  Record.push_back(D->getStorageClassAsWritten());
678  Record.push_back(D->isThreadSpecified());
679  Record.push_back(D->hasCXXDirectInitializer());
680  Record.push_back(D->isExceptionVariable());
681  Record.push_back(D->isNRVOVariable());
682  Record.push_back(D->isCXXForRangeDecl());
683  Record.push_back(D->isARCPseudoStrong());
684  if (D->getInit()) {
685    Record.push_back(!D->isInitKnownICE() ? 1 : (D->isInitICE() ? 3 : 2));
686    Writer.AddStmt(D->getInit());
687  } else {
688    Record.push_back(0);
689  }
690
691  MemberSpecializationInfo *SpecInfo
692    = D->isStaticDataMember() ? D->getMemberSpecializationInfo() : 0;
693  Record.push_back(SpecInfo != 0);
694  if (SpecInfo) {
695    Writer.AddDeclRef(SpecInfo->getInstantiatedFrom(), Record);
696    Record.push_back(SpecInfo->getTemplateSpecializationKind());
697    Writer.AddSourceLocation(SpecInfo->getPointOfInstantiation(), Record);
698  }
699
700  if (!D->hasAttrs() &&
701      !D->isImplicit() &&
702      !D->isUsed(false) &&
703      !D->isInvalidDecl() &&
704      !D->isReferenced() &&
705      !D->isTopLevelDeclInObjCContainer() &&
706      D->getAccess() == AS_none &&
707      !D->isModulePrivate() &&
708      D->getDeclName().getNameKind() == DeclarationName::Identifier &&
709      !D->hasExtInfo() &&
710      !D->getPreviousDeclaration() &&
711      !D->hasCXXDirectInitializer() &&
712      D->getInit() == 0 &&
713      !isa<ParmVarDecl>(D) &&
714      !SpecInfo)
715    AbbrevToUse = Writer.getDeclVarAbbrev();
716
717  Code = serialization::DECL_VAR;
718}
719
720void ASTDeclWriter::VisitImplicitParamDecl(ImplicitParamDecl *D) {
721  VisitVarDecl(D);
722  Code = serialization::DECL_IMPLICIT_PARAM;
723}
724
725void ASTDeclWriter::VisitParmVarDecl(ParmVarDecl *D) {
726  VisitVarDecl(D);
727  Record.push_back(D->isObjCMethodParameter());
728  Record.push_back(D->getFunctionScopeDepth());
729  Record.push_back(D->getFunctionScopeIndex());
730  Record.push_back(D->getObjCDeclQualifier()); // FIXME: stable encoding
731  Record.push_back(D->isKNRPromoted());
732  Record.push_back(D->hasInheritedDefaultArg());
733  Record.push_back(D->hasUninstantiatedDefaultArg());
734  if (D->hasUninstantiatedDefaultArg())
735    Writer.AddStmt(D->getUninstantiatedDefaultArg());
736  Code = serialization::DECL_PARM_VAR;
737
738  assert(!D->isARCPseudoStrong()); // can be true of ImplicitParamDecl
739
740  // If the assumptions about the DECL_PARM_VAR abbrev are true, use it.  Here
741  // we dynamically check for the properties that we optimize for, but don't
742  // know are true of all PARM_VAR_DECLs.
743  if (!D->hasAttrs() &&
744      !D->hasExtInfo() &&
745      !D->isImplicit() &&
746      !D->isUsed(false) &&
747      D->getAccess() == AS_none &&
748      !D->isModulePrivate() &&
749      D->getStorageClass() == 0 &&
750      !D->hasCXXDirectInitializer() && // Can params have this ever?
751      D->getFunctionScopeDepth() == 0 &&
752      D->getObjCDeclQualifier() == 0 &&
753      !D->isKNRPromoted() &&
754      !D->hasInheritedDefaultArg() &&
755      D->getInit() == 0 &&
756      !D->hasUninstantiatedDefaultArg())  // No default expr.
757    AbbrevToUse = Writer.getDeclParmVarAbbrev();
758
759  // Check things we know are true of *every* PARM_VAR_DECL, which is more than
760  // just us assuming it.
761  assert(!D->isInvalidDecl() && "Shouldn't emit invalid decls");
762  assert(!D->isThreadSpecified() && "PARM_VAR_DECL can't be __thread");
763  assert(D->getAccess() == AS_none && "PARM_VAR_DECL can't be public/private");
764  assert(!D->isExceptionVariable() && "PARM_VAR_DECL can't be exception var");
765  assert(D->getPreviousDeclaration() == 0 && "PARM_VAR_DECL can't be redecl");
766  assert(!D->isStaticDataMember() &&
767         "PARM_VAR_DECL can't be static data member");
768}
769
770void ASTDeclWriter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
771  VisitDecl(D);
772  Writer.AddStmt(D->getAsmString());
773  Writer.AddSourceLocation(D->getRParenLoc(), Record);
774  Code = serialization::DECL_FILE_SCOPE_ASM;
775}
776
777void ASTDeclWriter::VisitBlockDecl(BlockDecl *D) {
778  VisitDecl(D);
779  Writer.AddStmt(D->getBody());
780  Writer.AddTypeSourceInfo(D->getSignatureAsWritten(), Record);
781  Record.push_back(D->param_size());
782  for (FunctionDecl::param_iterator P = D->param_begin(), PEnd = D->param_end();
783       P != PEnd; ++P)
784    Writer.AddDeclRef(*P, Record);
785  Record.push_back(D->capturesCXXThis());
786  Record.push_back(D->getNumCaptures());
787  for (BlockDecl::capture_iterator
788         i = D->capture_begin(), e = D->capture_end(); i != e; ++i) {
789    const BlockDecl::Capture &capture = *i;
790    Writer.AddDeclRef(capture.getVariable(), Record);
791
792    unsigned flags = 0;
793    if (capture.isByRef()) flags |= 1;
794    if (capture.isNested()) flags |= 2;
795    if (capture.hasCopyExpr()) flags |= 4;
796    Record.push_back(flags);
797
798    if (capture.hasCopyExpr()) Writer.AddStmt(capture.getCopyExpr());
799  }
800
801  Code = serialization::DECL_BLOCK;
802}
803
804void ASTDeclWriter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
805  VisitDecl(D);
806  Record.push_back(D->getLanguage());
807  Writer.AddSourceLocation(D->getExternLoc(), Record);
808  Writer.AddSourceLocation(D->getRBraceLoc(), Record);
809  Code = serialization::DECL_LINKAGE_SPEC;
810}
811
812void ASTDeclWriter::VisitLabelDecl(LabelDecl *D) {
813  VisitNamedDecl(D);
814  Writer.AddSourceLocation(D->getLocStart(), Record);
815  Code = serialization::DECL_LABEL;
816}
817
818
819void ASTDeclWriter::VisitNamespaceDecl(NamespaceDecl *D) {
820  VisitNamedDecl(D);
821  Record.push_back(D->isInline());
822  Writer.AddSourceLocation(D->getLocStart(), Record);
823  Writer.AddSourceLocation(D->getRBraceLoc(), Record);
824  Writer.AddDeclRef(D->getNextNamespace(), Record);
825
826  // Only write one reference--original or anonymous
827  Record.push_back(D->isOriginalNamespace());
828  if (D->isOriginalNamespace())
829    Writer.AddDeclRef(D->getAnonymousNamespace(), Record);
830  else
831    Writer.AddDeclRef(D->getOriginalNamespace(), Record);
832  Code = serialization::DECL_NAMESPACE;
833
834  if (Writer.hasChain() && !D->isOriginalNamespace() &&
835      D->getOriginalNamespace()->isFromASTFile()) {
836    NamespaceDecl *NS = D->getOriginalNamespace();
837    Writer.AddUpdatedDeclContext(NS);
838
839    // Make sure all visible decls are written. They will be recorded later.
840    NS->lookup(DeclarationName());
841    StoredDeclsMap *Map = static_cast<StoredDeclsMap*>(NS->getLookupPtr());
842    if (Map) {
843      for (StoredDeclsMap::iterator D = Map->begin(), DEnd = Map->end();
844           D != DEnd; ++D) {
845        DeclContext::lookup_result Result = D->second.getLookupResult();
846        while (Result.first != Result.second) {
847          Writer.GetDeclRef(*Result.first);
848          ++Result.first;
849        }
850      }
851    }
852  }
853
854  if (Writer.hasChain() && D->isAnonymousNamespace() && !D->getNextNamespace()){
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, 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
926  CXXRecordDecl *DefinitionDecl = 0;
927  if (D->DefinitionData)
928    DefinitionDecl = D->DefinitionData->Definition;
929  Writer.AddDeclRef(DefinitionDecl, Record);
930  if (D == DefinitionDecl)
931    Writer.AddCXXDefinitionData(D, Record);
932
933  enum {
934    CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
935  };
936  if (ClassTemplateDecl *TemplD = D->getDescribedClassTemplate()) {
937    Record.push_back(CXXRecTemplate);
938    Writer.AddDeclRef(TemplD, Record);
939  } else if (MemberSpecializationInfo *MSInfo
940               = D->getMemberSpecializationInfo()) {
941    Record.push_back(CXXRecMemberSpecialization);
942    Writer.AddDeclRef(MSInfo->getInstantiatedFrom(), Record);
943    Record.push_back(MSInfo->getTemplateSpecializationKind());
944    Writer.AddSourceLocation(MSInfo->getPointOfInstantiation(), Record);
945  } else {
946    Record.push_back(CXXRecNotTemplate);
947  }
948
949  // Store the key function to avoid deserializing every method so we can
950  // compute it.
951  if (D->IsCompleteDefinition)
952    Writer.AddDeclRef(Context.getKeyFunction(D), Record);
953
954  Code = serialization::DECL_CXX_RECORD;
955}
956
957void ASTDeclWriter::VisitCXXMethodDecl(CXXMethodDecl *D) {
958  VisitFunctionDecl(D);
959  Record.push_back(D->size_overridden_methods());
960  for (CXXMethodDecl::method_iterator
961         I = D->begin_overridden_methods(), E = D->end_overridden_methods();
962         I != E; ++I)
963    Writer.AddDeclRef(*I, Record);
964  Code = serialization::DECL_CXX_METHOD;
965}
966
967void ASTDeclWriter::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
968  VisitCXXMethodDecl(D);
969
970  Record.push_back(D->IsExplicitSpecified);
971  Record.push_back(D->ImplicitlyDefined);
972  Writer.AddCXXCtorInitializers(D->CtorInitializers, D->NumCtorInitializers,
973                                Record);
974
975  Code = serialization::DECL_CXX_CONSTRUCTOR;
976}
977
978void ASTDeclWriter::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
979  VisitCXXMethodDecl(D);
980
981  Record.push_back(D->ImplicitlyDefined);
982  Writer.AddDeclRef(D->OperatorDelete, Record);
983
984  Code = serialization::DECL_CXX_DESTRUCTOR;
985}
986
987void ASTDeclWriter::VisitCXXConversionDecl(CXXConversionDecl *D) {
988  VisitCXXMethodDecl(D);
989  Record.push_back(D->IsExplicitSpecified);
990  Code = serialization::DECL_CXX_CONVERSION;
991}
992
993void ASTDeclWriter::VisitImportDecl(ImportDecl *D) {
994  VisitDecl(D);
995  ArrayRef<SourceLocation> IdentifierLocs = D->getIdentifierLocs();
996  Record.push_back(!IdentifierLocs.empty());
997  if (IdentifierLocs.empty()) {
998    Writer.AddSourceLocation(D->getLocEnd(), Record);
999    Record.push_back(1);
1000  } else {
1001    for (unsigned I = 0, N = IdentifierLocs.size(); I != N; ++I)
1002      Writer.AddSourceLocation(IdentifierLocs[I], Record);
1003    Record.push_back(IdentifierLocs.size());
1004  }
1005  // Note: the number of source locations must always be the last element in
1006  // the record.
1007  Code = serialization::DECL_IMPORT;
1008}
1009
1010void ASTDeclWriter::VisitAccessSpecDecl(AccessSpecDecl *D) {
1011  VisitDecl(D);
1012  Writer.AddSourceLocation(D->getColonLoc(), Record);
1013  Code = serialization::DECL_ACCESS_SPEC;
1014}
1015
1016void ASTDeclWriter::VisitFriendDecl(FriendDecl *D) {
1017  VisitDecl(D);
1018  Record.push_back(D->Friend.is<TypeSourceInfo*>());
1019  if (D->Friend.is<TypeSourceInfo*>())
1020    Writer.AddTypeSourceInfo(D->Friend.get<TypeSourceInfo*>(), Record);
1021  else
1022    Writer.AddDeclRef(D->Friend.get<NamedDecl*>(), Record);
1023  Writer.AddDeclRef(D->getNextFriend(), Record);
1024  Record.push_back(D->UnsupportedFriend);
1025  Writer.AddSourceLocation(D->FriendLoc, Record);
1026  Code = serialization::DECL_FRIEND;
1027}
1028
1029void ASTDeclWriter::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1030  VisitDecl(D);
1031  Record.push_back(D->getNumTemplateParameters());
1032  for (unsigned i = 0, e = D->getNumTemplateParameters(); i != e; ++i)
1033    Writer.AddTemplateParameterList(D->getTemplateParameterList(i), Record);
1034  Record.push_back(D->getFriendDecl() != 0);
1035  if (D->getFriendDecl())
1036    Writer.AddDeclRef(D->getFriendDecl(), Record);
1037  else
1038    Writer.AddTypeSourceInfo(D->getFriendType(), Record);
1039  Writer.AddSourceLocation(D->getFriendLoc(), Record);
1040  Code = serialization::DECL_FRIEND_TEMPLATE;
1041}
1042
1043void ASTDeclWriter::VisitTemplateDecl(TemplateDecl *D) {
1044  VisitNamedDecl(D);
1045
1046  Writer.AddDeclRef(D->getTemplatedDecl(), Record);
1047  Writer.AddTemplateParameterList(D->getTemplateParameters(), Record);
1048}
1049
1050void ASTDeclWriter::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1051  // Emit data to initialize CommonOrPrev before VisitTemplateDecl so that
1052  // getCommonPtr() can be used while this is still initializing.
1053  enum { FirstDeclaration, FirstInFile, PointsToPrevious };
1054  RedeclarableTemplateDecl *Prev = D->getPreviousDeclaration();
1055  RedeclarableTemplateDecl *First = 0;
1056  if (!Prev) {
1057    Record.push_back(FirstDeclaration);
1058
1059    // This declaration owns the 'common' pointer, so serialize that data now.
1060    Writer.AddDeclRef(D->getInstantiatedFromMemberTemplate(), Record);
1061    if (D->getInstantiatedFromMemberTemplate())
1062      Record.push_back(D->isMemberSpecialization());
1063  } else {
1064    First = D->getFirstDeclaration();
1065    Record.push_back(Prev->isFromASTFile()? FirstInFile : PointsToPrevious);
1066    Writer.AddDeclRef(First, Record);
1067    Writer.AddDeclRef(Prev, Record);
1068  }
1069
1070  if (D->getMostRecentDeclaration() != D && (!Prev || Prev->isFromASTFile())) {
1071    if (!First)
1072      First = D->getFirstDeclaration();
1073
1074    // Capture the set of redeclarations in this file.
1075    LocalRedeclarationsInfo LocalInfo = {
1076      Writer.GetDeclRef(First),
1077      Writer.GetDeclRef(D),
1078      Writer.GetDeclRef(D->getMostRecentDeclaration())
1079    };
1080    Writer.LocalRedeclarations.push_back(LocalInfo);
1081  }
1082
1083  VisitTemplateDecl(D);
1084  Record.push_back(D->getIdentifierNamespace());
1085}
1086
1087void ASTDeclWriter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1088  VisitRedeclarableTemplateDecl(D);
1089
1090  if (D->getPreviousDeclaration() == 0) {
1091    typedef llvm::FoldingSet<ClassTemplateSpecializationDecl> CTSDSetTy;
1092    CTSDSetTy &CTSDSet = D->getSpecializations();
1093    Record.push_back(CTSDSet.size());
1094    for (CTSDSetTy::iterator I=CTSDSet.begin(), E = CTSDSet.end(); I!=E; ++I) {
1095      assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
1096      Writer.AddDeclRef(&*I, Record);
1097    }
1098
1099    typedef llvm::FoldingSet<ClassTemplatePartialSpecializationDecl> CTPSDSetTy;
1100    CTPSDSetTy &CTPSDSet = D->getPartialSpecializations();
1101    Record.push_back(CTPSDSet.size());
1102    for (CTPSDSetTy::iterator I=CTPSDSet.begin(), E=CTPSDSet.end(); I!=E; ++I) {
1103      assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
1104      Writer.AddDeclRef(&*I, Record);
1105    }
1106
1107    // InjectedClassNameType is computed, no need to write it.
1108  }
1109  Code = serialization::DECL_CLASS_TEMPLATE;
1110}
1111
1112void ASTDeclWriter::VisitClassTemplateSpecializationDecl(
1113                                           ClassTemplateSpecializationDecl *D) {
1114  VisitCXXRecordDecl(D);
1115
1116  llvm::PointerUnion<ClassTemplateDecl *,
1117                     ClassTemplatePartialSpecializationDecl *> InstFrom
1118    = D->getSpecializedTemplateOrPartial();
1119  if (Decl *InstFromD = InstFrom.dyn_cast<ClassTemplateDecl *>()) {
1120    Writer.AddDeclRef(InstFromD, Record);
1121  } else {
1122    Writer.AddDeclRef(InstFrom.get<ClassTemplatePartialSpecializationDecl *>(),
1123                      Record);
1124    Writer.AddTemplateArgumentList(&D->getTemplateInstantiationArgs(), Record);
1125  }
1126
1127  // Explicit info.
1128  Writer.AddTypeSourceInfo(D->getTypeAsWritten(), Record);
1129  if (D->getTypeAsWritten()) {
1130    Writer.AddSourceLocation(D->getExternLoc(), Record);
1131    Writer.AddSourceLocation(D->getTemplateKeywordLoc(), Record);
1132  }
1133
1134  Writer.AddTemplateArgumentList(&D->getTemplateArgs(), Record);
1135  Writer.AddSourceLocation(D->getPointOfInstantiation(), Record);
1136  Record.push_back(D->getSpecializationKind());
1137
1138  if (D->isCanonicalDecl()) {
1139    // When reading, we'll add it to the folding set of the following template.
1140    Writer.AddDeclRef(D->getSpecializedTemplate()->getCanonicalDecl(), Record);
1141  }
1142
1143  Code = serialization::DECL_CLASS_TEMPLATE_SPECIALIZATION;
1144}
1145
1146void ASTDeclWriter::VisitClassTemplatePartialSpecializationDecl(
1147                                    ClassTemplatePartialSpecializationDecl *D) {
1148  VisitClassTemplateSpecializationDecl(D);
1149
1150  Writer.AddTemplateParameterList(D->getTemplateParameters(), Record);
1151
1152  Record.push_back(D->getNumTemplateArgsAsWritten());
1153  for (int i = 0, e = D->getNumTemplateArgsAsWritten(); i != e; ++i)
1154    Writer.AddTemplateArgumentLoc(D->getTemplateArgsAsWritten()[i], Record);
1155
1156  Record.push_back(D->getSequenceNumber());
1157
1158  // These are read/set from/to the first declaration.
1159  if (D->getPreviousDeclaration() == 0) {
1160    Writer.AddDeclRef(D->getInstantiatedFromMember(), Record);
1161    Record.push_back(D->isMemberSpecialization());
1162  }
1163
1164  Code = serialization::DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION;
1165}
1166
1167void ASTDeclWriter::VisitClassScopeFunctionSpecializationDecl(
1168                                    ClassScopeFunctionSpecializationDecl *D) {
1169  VisitDecl(D);
1170  Writer.AddDeclRef(D->getSpecialization(), Record);
1171  Code = serialization::DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION;
1172}
1173
1174
1175void ASTDeclWriter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1176  VisitRedeclarableTemplateDecl(D);
1177
1178  if (D->getPreviousDeclaration() == 0) {
1179    // This FunctionTemplateDecl owns the CommonPtr; write it.
1180
1181    // Write the function specialization declarations.
1182    Record.push_back(D->getSpecializations().size());
1183    for (llvm::FoldingSet<FunctionTemplateSpecializationInfo>::iterator
1184           I = D->getSpecializations().begin(),
1185           E = D->getSpecializations().end()   ; I != E; ++I) {
1186      assert(I->Function->isCanonicalDecl() &&
1187             "Expected only canonical decls in set");
1188      Writer.AddDeclRef(I->Function, Record);
1189    }
1190  }
1191  Code = serialization::DECL_FUNCTION_TEMPLATE;
1192}
1193
1194void ASTDeclWriter::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
1195  VisitTypeDecl(D);
1196
1197  Record.push_back(D->wasDeclaredWithTypename());
1198  Record.push_back(D->defaultArgumentWasInherited());
1199  Writer.AddTypeSourceInfo(D->getDefaultArgumentInfo(), Record);
1200
1201  Code = serialization::DECL_TEMPLATE_TYPE_PARM;
1202}
1203
1204void ASTDeclWriter::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
1205  // For an expanded parameter pack, record the number of expansion types here
1206  // so that it's easier for
1207  if (D->isExpandedParameterPack())
1208    Record.push_back(D->getNumExpansionTypes());
1209
1210  VisitDeclaratorDecl(D);
1211  // TemplateParmPosition.
1212  Record.push_back(D->getDepth());
1213  Record.push_back(D->getPosition());
1214
1215  if (D->isExpandedParameterPack()) {
1216    for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
1217      Writer.AddTypeRef(D->getExpansionType(I), Record);
1218      Writer.AddTypeSourceInfo(D->getExpansionTypeSourceInfo(I), Record);
1219    }
1220
1221    Code = serialization::DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK;
1222  } else {
1223    // Rest of NonTypeTemplateParmDecl.
1224    Record.push_back(D->isParameterPack());
1225    Record.push_back(D->getDefaultArgument() != 0);
1226    if (D->getDefaultArgument()) {
1227      Writer.AddStmt(D->getDefaultArgument());
1228      Record.push_back(D->defaultArgumentWasInherited());
1229    }
1230    Code = serialization::DECL_NON_TYPE_TEMPLATE_PARM;
1231  }
1232}
1233
1234void ASTDeclWriter::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
1235  VisitTemplateDecl(D);
1236  // TemplateParmPosition.
1237  Record.push_back(D->getDepth());
1238  Record.push_back(D->getPosition());
1239  // Rest of TemplateTemplateParmDecl.
1240  Writer.AddTemplateArgumentLoc(D->getDefaultArgument(), Record);
1241  Record.push_back(D->defaultArgumentWasInherited());
1242  Record.push_back(D->isParameterPack());
1243  Code = serialization::DECL_TEMPLATE_TEMPLATE_PARM;
1244}
1245
1246void ASTDeclWriter::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
1247  VisitRedeclarableTemplateDecl(D);
1248  Code = serialization::DECL_TYPE_ALIAS_TEMPLATE;
1249}
1250
1251void ASTDeclWriter::VisitStaticAssertDecl(StaticAssertDecl *D) {
1252  VisitDecl(D);
1253  Writer.AddStmt(D->getAssertExpr());
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  enum { FirstDeclaration = 0, FirstInFile, PointsToPrevious };
1279  T *Prev = D->getPreviousDeclaration();
1280  T *First = D->getFirstDeclaration();
1281
1282  if (!Prev) {
1283    Record.push_back(FirstDeclaration);
1284  } else {
1285    Record.push_back(Prev->isFromASTFile()? FirstInFile : PointsToPrevious);
1286    Writer.AddDeclRef(First, Record);
1287    Writer.AddDeclRef(D->getPreviousDeclaration(), Record);
1288  }
1289
1290  if (D->RedeclLink.getPointer() != D && (!Prev || Prev->isFromASTFile())) {
1291    // Capture the set of redeclarations in this file.
1292    LocalRedeclarationsInfo LocalInfo = {
1293      Writer.GetDeclRef(First),
1294      Writer.GetDeclRef(static_cast<T*>(D)),
1295      Writer.GetDeclRef(D->getMostRecentDeclaration())
1296    };
1297    Writer.LocalRedeclarations.push_back(LocalInfo);
1298  }
1299}
1300
1301//===----------------------------------------------------------------------===//
1302// ASTWriter Implementation
1303//===----------------------------------------------------------------------===//
1304
1305void ASTWriter::WriteDeclsBlockAbbrevs() {
1306  using namespace llvm;
1307
1308  BitCodeAbbrev *Abv;
1309
1310  // Abbreviation for DECL_FIELD
1311  Abv = new BitCodeAbbrev();
1312  Abv->Add(BitCodeAbbrevOp(serialization::DECL_FIELD));
1313  // Decl
1314  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1315  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1316  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1317  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1318  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1319  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1320  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1321  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1322  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2));  // AccessSpecifier
1323  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1324  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1325  // NamedDecl
1326  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1327  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1328  // ValueDecl
1329  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1330  // DeclaratorDecl
1331  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1332  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1333  // FieldDecl
1334  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
1335  Abv->Add(BitCodeAbbrevOp(0));                       //getBitWidth
1336  // Type Source Info
1337  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1338  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1339  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1340  DeclFieldAbbrev = Stream.EmitAbbrev(Abv);
1341
1342  // Abbreviation for DECL_OBJC_IVAR
1343  Abv = new BitCodeAbbrev();
1344  Abv->Add(BitCodeAbbrevOp(serialization::DECL_OBJC_IVAR));
1345  // Decl
1346  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1347  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1348  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1349  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1350  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1351  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1352  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1353  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1354  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2));  // AccessSpecifier
1355  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1356  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1357  // NamedDecl
1358  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1359  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1360  // ValueDecl
1361  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1362  // DeclaratorDecl
1363  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1364  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1365  // FieldDecl
1366  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
1367  Abv->Add(BitCodeAbbrevOp(0));                       //getBitWidth
1368  // ObjC Ivar
1369  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getAccessControl
1370  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getSynthesize
1371  // Type Source Info
1372  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1373  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1374  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1375  DeclObjCIvarAbbrev = Stream.EmitAbbrev(Abv);
1376
1377  // Abbreviation for DECL_ENUM
1378  Abv = new BitCodeAbbrev();
1379  Abv->Add(BitCodeAbbrevOp(serialization::DECL_ENUM));
1380  // Redeclarable
1381  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1382  // Decl
1383  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1384  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1385  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1386  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1387  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1388  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1389  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1390  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1391  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1392  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1393  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1394  // NamedDecl
1395  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1396  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1397  // TypeDecl
1398  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1399  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1400  // TagDecl
1401  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IdentifierNamespace
1402  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getTagKind
1403  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCompleteDefinition
1404  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // EmbeddedInDeclarator
1405  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFreeStanding
1406  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // SourceLocation
1407  Abv->Add(BitCodeAbbrevOp(0));                         // hasExtInfo
1408  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // TypedefNameAnonDecl
1409  // EnumDecl
1410  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // AddTypeRef
1411  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IntegerType
1412  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getPromotionType
1413  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getNumPositiveBits
1414  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getNumNegativeBits
1415  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isScoped
1416  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isScopedUsingClassTag
1417  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isFixed
1418  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // InstantiatedMembEnum
1419  // DC
1420  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // LexicalOffset
1421  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // VisibleOffset
1422  DeclEnumAbbrev = Stream.EmitAbbrev(Abv);
1423
1424  // Abbreviation for DECL_RECORD
1425  Abv = new BitCodeAbbrev();
1426  Abv->Add(BitCodeAbbrevOp(serialization::DECL_RECORD));
1427  // Redeclarable
1428  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1429  // Decl
1430  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1431  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1432  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1433  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1434  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1435  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1436  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1437  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1438  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1439  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1440  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1441  // NamedDecl
1442  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1443  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1444  // TypeDecl
1445  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1446  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1447  // TagDecl
1448  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IdentifierNamespace
1449  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getTagKind
1450  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCompleteDefinition
1451  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // EmbeddedInDeclarator
1452  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFreeStanding
1453  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // SourceLocation
1454  Abv->Add(BitCodeAbbrevOp(0));                         // hasExtInfo
1455  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // TypedefNameAnonDecl
1456  // RecordDecl
1457  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // FlexibleArrayMember
1458  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // AnonymousStructUnion
1459  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // hasObjectMember
1460  // DC
1461  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // LexicalOffset
1462  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // VisibleOffset
1463  DeclRecordAbbrev = Stream.EmitAbbrev(Abv);
1464
1465  // Abbreviation for DECL_PARM_VAR
1466  Abv = new BitCodeAbbrev();
1467  Abv->Add(BitCodeAbbrevOp(serialization::DECL_PARM_VAR));
1468  // Redeclarable
1469  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1470  // Decl
1471  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1472  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1473  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1474  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1475  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1476  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1477  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1478  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1479  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1480  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1481  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1482  // NamedDecl
1483  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1484  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1485  // ValueDecl
1486  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1487  // DeclaratorDecl
1488  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1489  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1490  // VarDecl
1491  Abv->Add(BitCodeAbbrevOp(0));                       // StorageClass
1492  Abv->Add(BitCodeAbbrevOp(0));                       // StorageClassAsWritten
1493  Abv->Add(BitCodeAbbrevOp(0));                       // isThreadSpecified
1494  Abv->Add(BitCodeAbbrevOp(0));                       // hasCXXDirectInitializer
1495  Abv->Add(BitCodeAbbrevOp(0));                       // isExceptionVariable
1496  Abv->Add(BitCodeAbbrevOp(0));                       // isNRVOVariable
1497  Abv->Add(BitCodeAbbrevOp(0));                       // isCXXForRangeDecl
1498  Abv->Add(BitCodeAbbrevOp(0));                       // isARCPseudoStrong
1499  Abv->Add(BitCodeAbbrevOp(0));                       // HasInit
1500  Abv->Add(BitCodeAbbrevOp(0));                   // HasMemberSpecializationInfo
1501  // ParmVarDecl
1502  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsObjCMethodParameter
1503  Abv->Add(BitCodeAbbrevOp(0));                       // ScopeDepth
1504  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ScopeIndex
1505  Abv->Add(BitCodeAbbrevOp(0));                       // ObjCDeclQualifier
1506  Abv->Add(BitCodeAbbrevOp(0));                       // KNRPromoted
1507  Abv->Add(BitCodeAbbrevOp(0));                       // HasInheritedDefaultArg
1508  Abv->Add(BitCodeAbbrevOp(0));                   // HasUninstantiatedDefaultArg
1509  // Type Source Info
1510  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1511  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1512  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1513  DeclParmVarAbbrev = Stream.EmitAbbrev(Abv);
1514
1515  // Abbreviation for DECL_TYPEDEF
1516  Abv = new BitCodeAbbrev();
1517  Abv->Add(BitCodeAbbrevOp(serialization::DECL_TYPEDEF));
1518  // Redeclarable
1519  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1520  // Decl
1521  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1522  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1523  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1524  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1525  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1526  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1527  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1528  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1529  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1530  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1531  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1532  // NamedDecl
1533  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1534  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1535  // TypeDecl
1536  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1537  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1538  // TypedefDecl
1539  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1540  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1541  DeclTypedefAbbrev = Stream.EmitAbbrev(Abv);
1542
1543  // Abbreviation for DECL_VAR
1544  Abv = new BitCodeAbbrev();
1545  Abv->Add(BitCodeAbbrevOp(serialization::DECL_VAR));
1546  // Redeclarable
1547  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1548  // Decl
1549  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1550  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1551  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
1552  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1553  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1554  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1555  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1556  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1557  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1558  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1559  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1560  // NamedDecl
1561  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1562  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1563  // ValueDecl
1564  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1565  // DeclaratorDecl
1566  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1567  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1568  // VarDecl
1569  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // StorageClass
1570  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // StorageClassAsWritten
1571  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isThreadSpecified
1572  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // CXXDirectInitializer
1573  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isExceptionVariable
1574  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isNRVOVariable
1575  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCXXForRangeDecl
1576  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isARCPseudoStrong
1577  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // HasInit
1578  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // HasMemberSpecInfo
1579  // Type Source Info
1580  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1581  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1582  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1583  DeclVarAbbrev = Stream.EmitAbbrev(Abv);
1584
1585  // Abbreviation for EXPR_DECL_REF
1586  Abv = new BitCodeAbbrev();
1587  Abv->Add(BitCodeAbbrevOp(serialization::EXPR_DECL_REF));
1588  //Stmt
1589  //Expr
1590  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1591  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1592  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1593  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1594  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1595  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1596  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1597  //DeclRefExpr
1598  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //HasQualifier
1599  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //GetDeclFound
1600  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ExplicitTemplateArgs
1601  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //HadMultipleCandidates
1602  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclRef
1603  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1604  DeclRefExprAbbrev = Stream.EmitAbbrev(Abv);
1605
1606  // Abbreviation for EXPR_INTEGER_LITERAL
1607  Abv = new BitCodeAbbrev();
1608  Abv->Add(BitCodeAbbrevOp(serialization::EXPR_INTEGER_LITERAL));
1609  //Stmt
1610  //Expr
1611  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1612  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1613  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1614  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1615  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1616  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1617  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1618  //Integer Literal
1619  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1620  Abv->Add(BitCodeAbbrevOp(32));                      // Bit Width
1621  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Value
1622  IntegerLiteralAbbrev = Stream.EmitAbbrev(Abv);
1623
1624  // Abbreviation for EXPR_CHARACTER_LITERAL
1625  Abv = new BitCodeAbbrev();
1626  Abv->Add(BitCodeAbbrevOp(serialization::EXPR_CHARACTER_LITERAL));
1627  //Stmt
1628  //Expr
1629  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1630  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1631  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1632  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1633  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1634  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1635  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1636  //Character Literal
1637  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getValue
1638  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1639  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //IsWide
1640  CharacterLiteralAbbrev = Stream.EmitAbbrev(Abv);
1641
1642  Abv = new BitCodeAbbrev();
1643  Abv->Add(BitCodeAbbrevOp(serialization::DECL_CONTEXT_LEXICAL));
1644  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
1645  DeclContextLexicalAbbrev = Stream.EmitAbbrev(Abv);
1646
1647  Abv = new BitCodeAbbrev();
1648  Abv->Add(BitCodeAbbrevOp(serialization::DECL_CONTEXT_VISIBLE));
1649  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
1650  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
1651  DeclContextVisibleLookupAbbrev = Stream.EmitAbbrev(Abv);
1652}
1653
1654/// isRequiredDecl - Check if this is a "required" Decl, which must be seen by
1655/// consumers of the AST.
1656///
1657/// Such decls will always be deserialized from the AST file, so we would like
1658/// this to be as restrictive as possible. Currently the predicate is driven by
1659/// code generation requirements, if other clients have a different notion of
1660/// what is "required" then we may have to consider an alternate scheme where
1661/// clients can iterate over the top-level decls and get information on them,
1662/// without necessary deserializing them. We could explicitly require such
1663/// clients to use a separate API call to "realize" the decl. This should be
1664/// relatively painless since they would presumably only do it for top-level
1665/// decls.
1666static bool isRequiredDecl(const Decl *D, ASTContext &Context) {
1667  // An ObjCMethodDecl is never considered as "required" because its
1668  // implementation container always is.
1669
1670  // File scoped assembly or obj-c implementation must be seen.
1671  if (isa<FileScopeAsmDecl>(D) || isa<ObjCImplDecl>(D))
1672    return true;
1673
1674  return Context.DeclMustBeEmitted(D);
1675}
1676
1677void ASTWriter::WriteDecl(ASTContext &Context, Decl *D) {
1678  // Switch case IDs are per Decl.
1679  ClearSwitchCaseIDs();
1680
1681  RecordData Record;
1682  ASTDeclWriter W(*this, Context, Record);
1683
1684  // If this declaration is also a DeclContext, write blocks for the
1685  // declarations that lexically stored inside its context and those
1686  // declarations that are visible from its context. These blocks
1687  // are written before the declaration itself so that we can put
1688  // their offsets into the record for the declaration.
1689  uint64_t LexicalOffset = 0;
1690  uint64_t VisibleOffset = 0;
1691  DeclContext *DC = dyn_cast<DeclContext>(D);
1692  if (DC) {
1693    LexicalOffset = WriteDeclContextLexicalBlock(Context, DC);
1694    VisibleOffset = WriteDeclContextVisibleBlock(Context, DC);
1695  }
1696
1697  // Determine the ID for this declaration
1698  serialization::DeclID &IDR = DeclIDs[D];
1699  if (IDR == 0)
1700    IDR = NextDeclID++;
1701  serialization::DeclID ID = IDR;
1702
1703  if (ID < FirstDeclID) {
1704    // We're replacing a decl in a previous file.
1705    ReplacedDecls.push_back(ReplacedDeclInfo(ID, Stream.GetCurrentBitNo(),
1706                                             D->getLocation()));
1707  } else {
1708    unsigned Index = ID - FirstDeclID;
1709
1710    // Record the offset for this declaration
1711    SourceLocation Loc = D->getLocation();
1712    if (DeclOffsets.size() == Index)
1713      DeclOffsets.push_back(DeclOffset(Loc, Stream.GetCurrentBitNo()));
1714    else if (DeclOffsets.size() < Index) {
1715      DeclOffsets.resize(Index+1);
1716      DeclOffsets[Index].setLocation(Loc);
1717      DeclOffsets[Index].BitOffset = Stream.GetCurrentBitNo();
1718    }
1719
1720    SourceManager &SM = Context.getSourceManager();
1721    if (Loc.isValid() && SM.isLocalSourceLocation(Loc))
1722      associateDeclWithFile(D, ID);
1723  }
1724
1725  // Build and emit a record for this declaration
1726  Record.clear();
1727  W.Code = (serialization::DeclCode)0;
1728  W.AbbrevToUse = 0;
1729  W.Visit(D);
1730  if (DC) W.VisitDeclContext(DC, LexicalOffset, VisibleOffset);
1731
1732  if (!W.Code)
1733    llvm::report_fatal_error(StringRef("unexpected declaration kind '") +
1734                            D->getDeclKindName() + "'");
1735  Stream.EmitRecord(W.Code, Record, W.AbbrevToUse);
1736
1737  // Flush any expressions that were written as part of this declaration.
1738  FlushStmts();
1739
1740  // Flush C++ base specifiers, if there are any.
1741  FlushCXXBaseSpecifiers();
1742
1743  // Note "external" declarations so that we can add them to a record in the
1744  // AST file later.
1745  //
1746  // FIXME: This should be renamed, the predicate is much more complicated.
1747  if (isRequiredDecl(D, Context))
1748    ExternalDefinitions.push_back(ID);
1749}
1750