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 VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D);
72    void VisitVarTemplatePartialSpecializationDecl(
73        VarTemplatePartialSpecializationDecl *D);
74    void VisitClassScopeFunctionSpecializationDecl(
75                                       ClassScopeFunctionSpecializationDecl *D);
76    void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
77    void VisitValueDecl(ValueDecl *D);
78    void VisitEnumConstantDecl(EnumConstantDecl *D);
79    void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
80    void VisitDeclaratorDecl(DeclaratorDecl *D);
81    void VisitFunctionDecl(FunctionDecl *D);
82    void VisitCXXMethodDecl(CXXMethodDecl *D);
83    void VisitCXXConstructorDecl(CXXConstructorDecl *D);
84    void VisitCXXDestructorDecl(CXXDestructorDecl *D);
85    void VisitCXXConversionDecl(CXXConversionDecl *D);
86    void VisitFieldDecl(FieldDecl *D);
87    void VisitMSPropertyDecl(MSPropertyDecl *D);
88    void VisitIndirectFieldDecl(IndirectFieldDecl *D);
89    void VisitVarDecl(VarDecl *D);
90    void VisitImplicitParamDecl(ImplicitParamDecl *D);
91    void VisitParmVarDecl(ParmVarDecl *D);
92    void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
93    void VisitTemplateDecl(TemplateDecl *D);
94    void VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
95    void VisitClassTemplateDecl(ClassTemplateDecl *D);
96    void VisitVarTemplateDecl(VarTemplateDecl *D);
97    void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
98    void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
99    void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
100    void VisitUsingDecl(UsingDecl *D);
101    void VisitUsingShadowDecl(UsingShadowDecl *D);
102    void VisitLinkageSpecDecl(LinkageSpecDecl *D);
103    void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
104    void VisitImportDecl(ImportDecl *D);
105    void VisitAccessSpecDecl(AccessSpecDecl *D);
106    void VisitFriendDecl(FriendDecl *D);
107    void VisitFriendTemplateDecl(FriendTemplateDecl *D);
108    void VisitStaticAssertDecl(StaticAssertDecl *D);
109    void VisitBlockDecl(BlockDecl *D);
110    void VisitCapturedDecl(CapturedDecl *D);
111    void VisitEmptyDecl(EmptyDecl *D);
112
113    void VisitDeclContext(DeclContext *DC, uint64_t LexicalOffset,
114                          uint64_t VisibleOffset);
115    template <typename T> void VisitRedeclarable(Redeclarable<T> *D);
116
117
118    // FIXME: Put in the same order is DeclNodes.td?
119    void VisitObjCMethodDecl(ObjCMethodDecl *D);
120    void VisitObjCContainerDecl(ObjCContainerDecl *D);
121    void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
122    void VisitObjCIvarDecl(ObjCIvarDecl *D);
123    void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
124    void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
125    void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
126    void VisitObjCImplDecl(ObjCImplDecl *D);
127    void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
128    void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
129    void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
130    void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
131    void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
132    void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
133
134    void AddFunctionDefinition(const FunctionDecl *FD) {
135      assert(FD->doesThisDeclarationHaveABody());
136      if (auto *CD = dyn_cast<CXXConstructorDecl>(FD))
137        Writer.AddCXXCtorInitializers(CD->CtorInitializers,
138                                      CD->NumCtorInitializers, Record);
139      Writer.AddStmt(FD->getBody());
140    }
141  };
142}
143
144void ASTDeclWriter::Visit(Decl *D) {
145  DeclVisitor<ASTDeclWriter>::Visit(D);
146
147  // Source locations require array (variable-length) abbreviations.  The
148  // abbreviation infrastructure requires that arrays are encoded last, so
149  // we handle it here in the case of those classes derived from DeclaratorDecl
150  if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)){
151    Writer.AddTypeSourceInfo(DD->getTypeSourceInfo(), Record);
152  }
153
154  // Handle FunctionDecl's body here and write it after all other Stmts/Exprs
155  // have been written. We want it last because we will not read it back when
156  // retrieving it from the AST, we'll just lazily set the offset.
157  if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
158    Record.push_back(FD->doesThisDeclarationHaveABody());
159    if (FD->doesThisDeclarationHaveABody())
160      Writer.AddStmt(FD->getBody());
161  }
162}
163
164void ASTDeclWriter::VisitDecl(Decl *D) {
165  Writer.AddDeclRef(cast_or_null<Decl>(D->getDeclContext()), Record);
166  Writer.AddDeclRef(cast_or_null<Decl>(D->getLexicalDeclContext()), Record);
167  Record.push_back(D->isInvalidDecl());
168  Record.push_back(D->hasAttrs());
169  if (D->hasAttrs())
170    Writer.WriteAttributes(ArrayRef<const Attr*>(D->getAttrs().begin(),
171                                                 D->getAttrs().size()), Record);
172  Record.push_back(D->isImplicit());
173  Record.push_back(D->isUsed(false));
174  Record.push_back(D->isReferenced());
175  Record.push_back(D->isTopLevelDeclInObjCContainer());
176  Record.push_back(D->getAccess());
177  Record.push_back(D->isModulePrivate());
178  Record.push_back(Writer.inferSubmoduleIDFromLocation(D->getLocation()));
179
180  // If this declaration injected a name into a context different from its
181  // lexical context, and that context is an imported namespace, we need to
182  // update its visible declarations to include this name.
183  //
184  // This happens when we instantiate a class with a friend declaration or a
185  // function with a local extern declaration, for instance.
186  if (D->isOutOfLine()) {
187    auto *DC = D->getDeclContext();
188    while (auto *NS = dyn_cast<NamespaceDecl>(DC->getRedeclContext())) {
189      if (!NS->isFromASTFile())
190        break;
191      Writer.AddUpdatedDeclContext(NS->getPrimaryContext());
192      if (!NS->isInlineNamespace())
193        break;
194      DC = NS->getParent();
195    }
196  }
197}
198
199void ASTDeclWriter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
200  llvm_unreachable("Translation units aren't directly serialized");
201}
202
203void ASTDeclWriter::VisitNamedDecl(NamedDecl *D) {
204  VisitDecl(D);
205  Writer.AddDeclarationName(D->getDeclName(), Record);
206}
207
208void ASTDeclWriter::VisitTypeDecl(TypeDecl *D) {
209  VisitNamedDecl(D);
210  Writer.AddSourceLocation(D->getLocStart(), Record);
211  Writer.AddTypeRef(QualType(D->getTypeForDecl(), 0), Record);
212}
213
214void ASTDeclWriter::VisitTypedefNameDecl(TypedefNameDecl *D) {
215  VisitRedeclarable(D);
216  VisitTypeDecl(D);
217  Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
218  Record.push_back(D->isModed());
219  if (D->isModed())
220    Writer.AddTypeRef(D->getUnderlyingType(), Record);
221}
222
223void ASTDeclWriter::VisitTypedefDecl(TypedefDecl *D) {
224  VisitTypedefNameDecl(D);
225  if (!D->hasAttrs() &&
226      !D->isImplicit() &&
227      !D->isUsed(false) &&
228      D->getFirstDecl() == D->getMostRecentDecl() &&
229      !D->isInvalidDecl() &&
230      !D->isReferenced() &&
231      !D->isTopLevelDeclInObjCContainer() &&
232      D->getAccess() == AS_none &&
233      !D->isModulePrivate() &&
234      D->getDeclName().getNameKind() == DeclarationName::Identifier)
235    AbbrevToUse = Writer.getDeclTypedefAbbrev();
236
237  Code = serialization::DECL_TYPEDEF;
238}
239
240void ASTDeclWriter::VisitTypeAliasDecl(TypeAliasDecl *D) {
241  VisitTypedefNameDecl(D);
242  Code = serialization::DECL_TYPEALIAS;
243}
244
245void ASTDeclWriter::VisitTagDecl(TagDecl *D) {
246  VisitRedeclarable(D);
247  VisitTypeDecl(D);
248  Record.push_back(D->getIdentifierNamespace());
249  Record.push_back((unsigned)D->getTagKind()); // FIXME: stable encoding
250  Record.push_back(D->isCompleteDefinition());
251  Record.push_back(D->isEmbeddedInDeclarator());
252  Record.push_back(D->isFreeStanding());
253  Record.push_back(D->isCompleteDefinitionRequired());
254  Writer.AddSourceLocation(D->getRBraceLoc(), Record);
255  Record.push_back(D->hasExtInfo());
256  if (D->hasExtInfo())
257    Writer.AddQualifierInfo(*D->getExtInfo(), Record);
258  else if (D->hasDeclaratorForAnonDecl())
259    Writer.AddDeclRef(D->getDeclaratorForAnonDecl(), Record);
260  else
261    Writer.AddDeclRef(D->getTypedefNameForAnonDecl(), Record);
262}
263
264void ASTDeclWriter::VisitEnumDecl(EnumDecl *D) {
265  VisitTagDecl(D);
266  Writer.AddTypeSourceInfo(D->getIntegerTypeSourceInfo(), Record);
267  if (!D->getIntegerTypeSourceInfo())
268    Writer.AddTypeRef(D->getIntegerType(), Record);
269  Writer.AddTypeRef(D->getPromotionType(), Record);
270  Record.push_back(D->getNumPositiveBits());
271  Record.push_back(D->getNumNegativeBits());
272  Record.push_back(D->isScoped());
273  Record.push_back(D->isScopedUsingClassTag());
274  Record.push_back(D->isFixed());
275  if (MemberSpecializationInfo *MemberInfo = D->getMemberSpecializationInfo()) {
276    Writer.AddDeclRef(MemberInfo->getInstantiatedFrom(), Record);
277    Record.push_back(MemberInfo->getTemplateSpecializationKind());
278    Writer.AddSourceLocation(MemberInfo->getPointOfInstantiation(), Record);
279  } else {
280    Writer.AddDeclRef(nullptr, Record);
281  }
282
283  if (!D->hasAttrs() &&
284      !D->isImplicit() &&
285      !D->isUsed(false) &&
286      !D->hasExtInfo() &&
287      D->getFirstDecl() == D->getMostRecentDecl() &&
288      !D->isInvalidDecl() &&
289      !D->isReferenced() &&
290      !D->isTopLevelDeclInObjCContainer() &&
291      D->getAccess() == AS_none &&
292      !D->isModulePrivate() &&
293      !CXXRecordDecl::classofKind(D->getKind()) &&
294      !D->getIntegerTypeSourceInfo() &&
295      !D->getMemberSpecializationInfo() &&
296      D->getDeclName().getNameKind() == DeclarationName::Identifier)
297    AbbrevToUse = Writer.getDeclEnumAbbrev();
298
299  Code = serialization::DECL_ENUM;
300}
301
302void ASTDeclWriter::VisitRecordDecl(RecordDecl *D) {
303  VisitTagDecl(D);
304  Record.push_back(D->hasFlexibleArrayMember());
305  Record.push_back(D->isAnonymousStructOrUnion());
306  Record.push_back(D->hasObjectMember());
307  Record.push_back(D->hasVolatileMember());
308
309  if (!D->hasAttrs() &&
310      !D->isImplicit() &&
311      !D->isUsed(false) &&
312      !D->hasExtInfo() &&
313      D->getFirstDecl() == D->getMostRecentDecl() &&
314      !D->isInvalidDecl() &&
315      !D->isReferenced() &&
316      !D->isTopLevelDeclInObjCContainer() &&
317      D->getAccess() == AS_none &&
318      !D->isModulePrivate() &&
319      !CXXRecordDecl::classofKind(D->getKind()) &&
320      D->getDeclName().getNameKind() == DeclarationName::Identifier)
321    AbbrevToUse = Writer.getDeclRecordAbbrev();
322
323  Code = serialization::DECL_RECORD;
324}
325
326void ASTDeclWriter::VisitValueDecl(ValueDecl *D) {
327  VisitNamedDecl(D);
328  Writer.AddTypeRef(D->getType(), Record);
329}
330
331void ASTDeclWriter::VisitEnumConstantDecl(EnumConstantDecl *D) {
332  VisitValueDecl(D);
333  Record.push_back(D->getInitExpr()? 1 : 0);
334  if (D->getInitExpr())
335    Writer.AddStmt(D->getInitExpr());
336  Writer.AddAPSInt(D->getInitVal(), Record);
337
338  Code = serialization::DECL_ENUM_CONSTANT;
339}
340
341void ASTDeclWriter::VisitDeclaratorDecl(DeclaratorDecl *D) {
342  VisitValueDecl(D);
343  Writer.AddSourceLocation(D->getInnerLocStart(), Record);
344  Record.push_back(D->hasExtInfo());
345  if (D->hasExtInfo())
346    Writer.AddQualifierInfo(*D->getExtInfo(), Record);
347}
348
349void ASTDeclWriter::VisitFunctionDecl(FunctionDecl *D) {
350  VisitRedeclarable(D);
351  VisitDeclaratorDecl(D);
352
353  Writer.AddDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record);
354  Record.push_back(D->getIdentifierNamespace());
355
356  // FunctionDecl's body is handled last at ASTWriterDecl::Visit,
357  // after everything else is written.
358
359  Record.push_back(D->getStorageClass()); // FIXME: stable encoding
360  Record.push_back(D->IsInline);
361  Record.push_back(D->isInlineSpecified());
362  Record.push_back(D->isVirtualAsWritten());
363  Record.push_back(D->isPure());
364  Record.push_back(D->hasInheritedPrototype());
365  Record.push_back(D->hasWrittenPrototype());
366  Record.push_back(D->isDeletedAsWritten());
367  Record.push_back(D->isTrivial());
368  Record.push_back(D->isDefaulted());
369  Record.push_back(D->isExplicitlyDefaulted());
370  Record.push_back(D->hasImplicitReturnZero());
371  Record.push_back(D->isConstexpr());
372  Record.push_back(D->HasSkippedBody);
373  Record.push_back(D->isLateTemplateParsed());
374  Record.push_back(D->getLinkageInternal());
375  Writer.AddSourceLocation(D->getLocEnd(), Record);
376
377  Record.push_back(D->getTemplatedKind());
378  switch (D->getTemplatedKind()) {
379  case FunctionDecl::TK_NonTemplate:
380    break;
381  case FunctionDecl::TK_FunctionTemplate:
382    Writer.AddDeclRef(D->getDescribedFunctionTemplate(), Record);
383    break;
384  case FunctionDecl::TK_MemberSpecialization: {
385    MemberSpecializationInfo *MemberInfo = D->getMemberSpecializationInfo();
386    Writer.AddDeclRef(MemberInfo->getInstantiatedFrom(), Record);
387    Record.push_back(MemberInfo->getTemplateSpecializationKind());
388    Writer.AddSourceLocation(MemberInfo->getPointOfInstantiation(), Record);
389    break;
390  }
391  case FunctionDecl::TK_FunctionTemplateSpecialization: {
392    FunctionTemplateSpecializationInfo *
393      FTSInfo = D->getTemplateSpecializationInfo();
394    Writer.AddDeclRef(FTSInfo->getTemplate(), Record);
395    Record.push_back(FTSInfo->getTemplateSpecializationKind());
396
397    // Template arguments.
398    Writer.AddTemplateArgumentList(FTSInfo->TemplateArguments, Record);
399
400    // Template args as written.
401    Record.push_back(FTSInfo->TemplateArgumentsAsWritten != nullptr);
402    if (FTSInfo->TemplateArgumentsAsWritten) {
403      Record.push_back(FTSInfo->TemplateArgumentsAsWritten->NumTemplateArgs);
404      for (int i=0, e = FTSInfo->TemplateArgumentsAsWritten->NumTemplateArgs;
405             i!=e; ++i)
406        Writer.AddTemplateArgumentLoc((*FTSInfo->TemplateArgumentsAsWritten)[i],
407                                      Record);
408      Writer.AddSourceLocation(FTSInfo->TemplateArgumentsAsWritten->LAngleLoc,
409                               Record);
410      Writer.AddSourceLocation(FTSInfo->TemplateArgumentsAsWritten->RAngleLoc,
411                               Record);
412    }
413
414    Writer.AddSourceLocation(FTSInfo->getPointOfInstantiation(), Record);
415
416    if (D->isCanonicalDecl()) {
417      // Write the template that contains the specializations set. We will
418      // add a FunctionTemplateSpecializationInfo to it when reading.
419      Writer.AddDeclRef(FTSInfo->getTemplate()->getCanonicalDecl(), Record);
420    }
421    break;
422  }
423  case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
424    DependentFunctionTemplateSpecializationInfo *
425      DFTSInfo = D->getDependentSpecializationInfo();
426
427    // Templates.
428    Record.push_back(DFTSInfo->getNumTemplates());
429    for (int i=0, e = DFTSInfo->getNumTemplates(); i != e; ++i)
430      Writer.AddDeclRef(DFTSInfo->getTemplate(i), Record);
431
432    // Templates args.
433    Record.push_back(DFTSInfo->getNumTemplateArgs());
434    for (int i=0, e = DFTSInfo->getNumTemplateArgs(); i != e; ++i)
435      Writer.AddTemplateArgumentLoc(DFTSInfo->getTemplateArg(i), Record);
436    Writer.AddSourceLocation(DFTSInfo->getLAngleLoc(), Record);
437    Writer.AddSourceLocation(DFTSInfo->getRAngleLoc(), Record);
438    break;
439  }
440  }
441
442  Record.push_back(D->param_size());
443  for (auto P : D->params())
444    Writer.AddDeclRef(P, Record);
445  Code = serialization::DECL_FUNCTION;
446}
447
448void ASTDeclWriter::VisitObjCMethodDecl(ObjCMethodDecl *D) {
449  VisitNamedDecl(D);
450  // FIXME: convert to LazyStmtPtr?
451  // Unlike C/C++, method bodies will never be in header files.
452  bool HasBodyStuff = D->getBody() != nullptr     ||
453                      D->getSelfDecl() != nullptr || D->getCmdDecl() != nullptr;
454  Record.push_back(HasBodyStuff);
455  if (HasBodyStuff) {
456    Writer.AddStmt(D->getBody());
457    Writer.AddDeclRef(D->getSelfDecl(), Record);
458    Writer.AddDeclRef(D->getCmdDecl(), Record);
459  }
460  Record.push_back(D->isInstanceMethod());
461  Record.push_back(D->isVariadic());
462  Record.push_back(D->isPropertyAccessor());
463  Record.push_back(D->isDefined());
464  Record.push_back(D->IsOverriding);
465  Record.push_back(D->HasSkippedBody);
466
467  Record.push_back(D->IsRedeclaration);
468  Record.push_back(D->HasRedeclaration);
469  if (D->HasRedeclaration) {
470    assert(Context.getObjCMethodRedeclaration(D));
471    Writer.AddDeclRef(Context.getObjCMethodRedeclaration(D), Record);
472  }
473
474  // FIXME: stable encoding for @required/@optional
475  Record.push_back(D->getImplementationControl());
476  // FIXME: stable encoding for in/out/inout/bycopy/byref/oneway
477  Record.push_back(D->getObjCDeclQualifier());
478  Record.push_back(D->hasRelatedResultType());
479  Writer.AddTypeRef(D->getReturnType(), Record);
480  Writer.AddTypeSourceInfo(D->getReturnTypeSourceInfo(), Record);
481  Writer.AddSourceLocation(D->getLocEnd(), Record);
482  Record.push_back(D->param_size());
483  for (const auto *P : D->params())
484    Writer.AddDeclRef(P, Record);
485
486  Record.push_back(D->SelLocsKind);
487  unsigned NumStoredSelLocs = D->getNumStoredSelLocs();
488  SourceLocation *SelLocs = D->getStoredSelLocs();
489  Record.push_back(NumStoredSelLocs);
490  for (unsigned i = 0; i != NumStoredSelLocs; ++i)
491    Writer.AddSourceLocation(SelLocs[i], Record);
492
493  Code = serialization::DECL_OBJC_METHOD;
494}
495
496void ASTDeclWriter::VisitObjCContainerDecl(ObjCContainerDecl *D) {
497  VisitNamedDecl(D);
498  Writer.AddSourceLocation(D->getAtStartLoc(), Record);
499  Writer.AddSourceRange(D->getAtEndRange(), Record);
500  // Abstract class (no need to define a stable serialization::DECL code).
501}
502
503void ASTDeclWriter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *D) {
504  VisitRedeclarable(D);
505  VisitObjCContainerDecl(D);
506  Writer.AddTypeRef(QualType(D->getTypeForDecl(), 0), Record);
507
508  Record.push_back(D->isThisDeclarationADefinition());
509  if (D->isThisDeclarationADefinition()) {
510    // Write the DefinitionData
511    ObjCInterfaceDecl::DefinitionData &Data = D->data();
512
513    Writer.AddDeclRef(D->getSuperClass(), Record);
514    Writer.AddSourceLocation(D->getSuperClassLoc(), Record);
515    Writer.AddSourceLocation(D->getEndOfDefinitionLoc(), Record);
516    Record.push_back(Data.HasDesignatedInitializers);
517
518    // Write out the protocols that are directly referenced by the @interface.
519    Record.push_back(Data.ReferencedProtocols.size());
520    for (const auto *P : D->protocols())
521      Writer.AddDeclRef(P, Record);
522    for (const auto &PL : D->protocol_locs())
523      Writer.AddSourceLocation(PL, Record);
524
525    // Write out the protocols that are transitively referenced.
526    Record.push_back(Data.AllReferencedProtocols.size());
527    for (ObjCList<ObjCProtocolDecl>::iterator
528              P = Data.AllReferencedProtocols.begin(),
529           PEnd = Data.AllReferencedProtocols.end();
530         P != PEnd; ++P)
531      Writer.AddDeclRef(*P, Record);
532
533
534    if (ObjCCategoryDecl *Cat = D->getCategoryListRaw()) {
535      // Ensure that we write out the set of categories for this class.
536      Writer.ObjCClassesWithCategories.insert(D);
537
538      // Make sure that the categories get serialized.
539      for (; Cat; Cat = Cat->getNextClassCategoryRaw())
540        (void)Writer.GetDeclRef(Cat);
541    }
542  }
543
544  Code = serialization::DECL_OBJC_INTERFACE;
545}
546
547void ASTDeclWriter::VisitObjCIvarDecl(ObjCIvarDecl *D) {
548  VisitFieldDecl(D);
549  // FIXME: stable encoding for @public/@private/@protected/@package
550  Record.push_back(D->getAccessControl());
551  Record.push_back(D->getSynthesize());
552
553  if (!D->hasAttrs() &&
554      !D->isImplicit() &&
555      !D->isUsed(false) &&
556      !D->isInvalidDecl() &&
557      !D->isReferenced() &&
558      !D->isModulePrivate() &&
559      !D->getBitWidth() &&
560      !D->hasExtInfo() &&
561      D->getDeclName())
562    AbbrevToUse = Writer.getDeclObjCIvarAbbrev();
563
564  Code = serialization::DECL_OBJC_IVAR;
565}
566
567void ASTDeclWriter::VisitObjCProtocolDecl(ObjCProtocolDecl *D) {
568  VisitRedeclarable(D);
569  VisitObjCContainerDecl(D);
570
571  Record.push_back(D->isThisDeclarationADefinition());
572  if (D->isThisDeclarationADefinition()) {
573    Record.push_back(D->protocol_size());
574    for (const auto *I : D->protocols())
575      Writer.AddDeclRef(I, Record);
576    for (const auto &PL : D->protocol_locs())
577      Writer.AddSourceLocation(PL, Record);
578  }
579
580  Code = serialization::DECL_OBJC_PROTOCOL;
581}
582
583void ASTDeclWriter::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D) {
584  VisitFieldDecl(D);
585  Code = serialization::DECL_OBJC_AT_DEFS_FIELD;
586}
587
588void ASTDeclWriter::VisitObjCCategoryDecl(ObjCCategoryDecl *D) {
589  VisitObjCContainerDecl(D);
590  Writer.AddSourceLocation(D->getCategoryNameLoc(), Record);
591  Writer.AddSourceLocation(D->getIvarLBraceLoc(), Record);
592  Writer.AddSourceLocation(D->getIvarRBraceLoc(), Record);
593  Writer.AddDeclRef(D->getClassInterface(), Record);
594  Record.push_back(D->protocol_size());
595  for (const auto *I : D->protocols())
596    Writer.AddDeclRef(I, Record);
597  for (const auto &PL : D->protocol_locs())
598    Writer.AddSourceLocation(PL, Record);
599  Code = serialization::DECL_OBJC_CATEGORY;
600}
601
602void ASTDeclWriter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D) {
603  VisitNamedDecl(D);
604  Writer.AddDeclRef(D->getClassInterface(), Record);
605  Code = serialization::DECL_OBJC_COMPATIBLE_ALIAS;
606}
607
608void ASTDeclWriter::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
609  VisitNamedDecl(D);
610  Writer.AddSourceLocation(D->getAtLoc(), Record);
611  Writer.AddSourceLocation(D->getLParenLoc(), Record);
612  Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
613  // FIXME: stable encoding
614  Record.push_back((unsigned)D->getPropertyAttributes());
615  Record.push_back((unsigned)D->getPropertyAttributesAsWritten());
616  // FIXME: stable encoding
617  Record.push_back((unsigned)D->getPropertyImplementation());
618  Writer.AddDeclarationName(D->getGetterName(), Record);
619  Writer.AddDeclarationName(D->getSetterName(), Record);
620  Writer.AddDeclRef(D->getGetterMethodDecl(), Record);
621  Writer.AddDeclRef(D->getSetterMethodDecl(), Record);
622  Writer.AddDeclRef(D->getPropertyIvarDecl(), Record);
623  Code = serialization::DECL_OBJC_PROPERTY;
624}
625
626void ASTDeclWriter::VisitObjCImplDecl(ObjCImplDecl *D) {
627  VisitObjCContainerDecl(D);
628  Writer.AddDeclRef(D->getClassInterface(), Record);
629  // Abstract class (no need to define a stable serialization::DECL code).
630}
631
632void ASTDeclWriter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
633  VisitObjCImplDecl(D);
634  Writer.AddIdentifierRef(D->getIdentifier(), Record);
635  Writer.AddSourceLocation(D->getCategoryNameLoc(), Record);
636  Code = serialization::DECL_OBJC_CATEGORY_IMPL;
637}
638
639void ASTDeclWriter::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
640  VisitObjCImplDecl(D);
641  Writer.AddDeclRef(D->getSuperClass(), Record);
642  Writer.AddSourceLocation(D->getSuperClassLoc(), Record);
643  Writer.AddSourceLocation(D->getIvarLBraceLoc(), Record);
644  Writer.AddSourceLocation(D->getIvarRBraceLoc(), Record);
645  Record.push_back(D->hasNonZeroConstructors());
646  Record.push_back(D->hasDestructors());
647  Writer.AddCXXCtorInitializers(D->IvarInitializers, D->NumIvarInitializers,
648                                Record);
649  Code = serialization::DECL_OBJC_IMPLEMENTATION;
650}
651
652void ASTDeclWriter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
653  VisitDecl(D);
654  Writer.AddSourceLocation(D->getLocStart(), Record);
655  Writer.AddDeclRef(D->getPropertyDecl(), Record);
656  Writer.AddDeclRef(D->getPropertyIvarDecl(), Record);
657  Writer.AddSourceLocation(D->getPropertyIvarDeclLoc(), Record);
658  Writer.AddStmt(D->getGetterCXXConstructor());
659  Writer.AddStmt(D->getSetterCXXAssignment());
660  Code = serialization::DECL_OBJC_PROPERTY_IMPL;
661}
662
663void ASTDeclWriter::VisitFieldDecl(FieldDecl *D) {
664  VisitDeclaratorDecl(D);
665  Record.push_back(D->isMutable());
666  if (D->InitializerOrBitWidth.getInt() != ICIS_NoInit ||
667      D->InitializerOrBitWidth.getPointer()) {
668    Record.push_back(D->InitializerOrBitWidth.getInt() + 1);
669    Writer.AddStmt(D->InitializerOrBitWidth.getPointer());
670  } else {
671    Record.push_back(0);
672  }
673  if (!D->getDeclName())
674    Writer.AddDeclRef(Context.getInstantiatedFromUnnamedFieldDecl(D), Record);
675
676  if (!D->hasAttrs() &&
677      !D->isImplicit() &&
678      !D->isUsed(false) &&
679      !D->isInvalidDecl() &&
680      !D->isReferenced() &&
681      !D->isTopLevelDeclInObjCContainer() &&
682      !D->isModulePrivate() &&
683      !D->getBitWidth() &&
684      !D->hasInClassInitializer() &&
685      !D->hasExtInfo() &&
686      !ObjCIvarDecl::classofKind(D->getKind()) &&
687      !ObjCAtDefsFieldDecl::classofKind(D->getKind()) &&
688      D->getDeclName())
689    AbbrevToUse = Writer.getDeclFieldAbbrev();
690
691  Code = serialization::DECL_FIELD;
692}
693
694void ASTDeclWriter::VisitMSPropertyDecl(MSPropertyDecl *D) {
695  VisitDeclaratorDecl(D);
696  Writer.AddIdentifierRef(D->getGetterId(), Record);
697  Writer.AddIdentifierRef(D->getSetterId(), Record);
698  Code = serialization::DECL_MS_PROPERTY;
699}
700
701void ASTDeclWriter::VisitIndirectFieldDecl(IndirectFieldDecl *D) {
702  VisitValueDecl(D);
703  Record.push_back(D->getChainingSize());
704
705  for (const auto *P : D->chain())
706    Writer.AddDeclRef(P, Record);
707  Code = serialization::DECL_INDIRECTFIELD;
708}
709
710void ASTDeclWriter::VisitVarDecl(VarDecl *D) {
711  VisitRedeclarable(D);
712  VisitDeclaratorDecl(D);
713  Record.push_back(D->getStorageClass());
714  Record.push_back(D->getTSCSpec());
715  Record.push_back(D->getInitStyle());
716  Record.push_back(D->isExceptionVariable());
717  Record.push_back(D->isNRVOVariable());
718  Record.push_back(D->isCXXForRangeDecl());
719  Record.push_back(D->isARCPseudoStrong());
720  Record.push_back(D->isConstexpr());
721  Record.push_back(D->isInitCapture());
722  Record.push_back(D->isPreviousDeclInSameBlockScope());
723  Record.push_back(D->getLinkageInternal());
724
725  if (D->getInit()) {
726    Record.push_back(!D->isInitKnownICE() ? 1 : (D->isInitICE() ? 3 : 2));
727    Writer.AddStmt(D->getInit());
728  } else {
729    Record.push_back(0);
730  }
731
732  enum {
733    VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
734  };
735  if (VarTemplateDecl *TemplD = D->getDescribedVarTemplate()) {
736    Record.push_back(VarTemplate);
737    Writer.AddDeclRef(TemplD, Record);
738  } else if (MemberSpecializationInfo *SpecInfo
739               = D->getMemberSpecializationInfo()) {
740    Record.push_back(StaticDataMemberSpecialization);
741    Writer.AddDeclRef(SpecInfo->getInstantiatedFrom(), Record);
742    Record.push_back(SpecInfo->getTemplateSpecializationKind());
743    Writer.AddSourceLocation(SpecInfo->getPointOfInstantiation(), Record);
744  } else {
745    Record.push_back(VarNotTemplate);
746  }
747
748  if (!D->hasAttrs() &&
749      !D->isImplicit() &&
750      !D->isUsed(false) &&
751      !D->isInvalidDecl() &&
752      !D->isReferenced() &&
753      !D->isTopLevelDeclInObjCContainer() &&
754      D->getAccess() == AS_none &&
755      !D->isModulePrivate() &&
756      D->getDeclName().getNameKind() == DeclarationName::Identifier &&
757      !D->hasExtInfo() &&
758      D->getFirstDecl() == D->getMostRecentDecl() &&
759      D->getInitStyle() == VarDecl::CInit &&
760      D->getInit() == nullptr &&
761      !isa<ParmVarDecl>(D) &&
762      !isa<VarTemplateSpecializationDecl>(D) &&
763      !D->isConstexpr() &&
764      !D->isInitCapture() &&
765      !D->isPreviousDeclInSameBlockScope() &&
766      !D->getMemberSpecializationInfo())
767    AbbrevToUse = Writer.getDeclVarAbbrev();
768
769  Code = serialization::DECL_VAR;
770}
771
772void ASTDeclWriter::VisitImplicitParamDecl(ImplicitParamDecl *D) {
773  VisitVarDecl(D);
774  Code = serialization::DECL_IMPLICIT_PARAM;
775}
776
777void ASTDeclWriter::VisitParmVarDecl(ParmVarDecl *D) {
778  VisitVarDecl(D);
779  Record.push_back(D->isObjCMethodParameter());
780  Record.push_back(D->getFunctionScopeDepth());
781  Record.push_back(D->getFunctionScopeIndex());
782  Record.push_back(D->getObjCDeclQualifier()); // FIXME: stable encoding
783  Record.push_back(D->isKNRPromoted());
784  Record.push_back(D->hasInheritedDefaultArg());
785  Record.push_back(D->hasUninstantiatedDefaultArg());
786  if (D->hasUninstantiatedDefaultArg())
787    Writer.AddStmt(D->getUninstantiatedDefaultArg());
788  Code = serialization::DECL_PARM_VAR;
789
790  assert(!D->isARCPseudoStrong()); // can be true of ImplicitParamDecl
791
792  // If the assumptions about the DECL_PARM_VAR abbrev are true, use it.  Here
793  // we dynamically check for the properties that we optimize for, but don't
794  // know are true of all PARM_VAR_DECLs.
795  if (!D->hasAttrs() &&
796      !D->hasExtInfo() &&
797      !D->isImplicit() &&
798      !D->isUsed(false) &&
799      !D->isInvalidDecl() &&
800      !D->isReferenced() &&
801      D->getAccess() == AS_none &&
802      !D->isModulePrivate() &&
803      D->getStorageClass() == 0 &&
804      D->getInitStyle() == VarDecl::CInit && // Can params have anything else?
805      D->getFunctionScopeDepth() == 0 &&
806      D->getObjCDeclQualifier() == 0 &&
807      !D->isKNRPromoted() &&
808      !D->hasInheritedDefaultArg() &&
809      D->getInit() == nullptr &&
810      !D->hasUninstantiatedDefaultArg())  // No default expr.
811    AbbrevToUse = Writer.getDeclParmVarAbbrev();
812
813  // Check things we know are true of *every* PARM_VAR_DECL, which is more than
814  // just us assuming it.
815  assert(!D->getTSCSpec() && "PARM_VAR_DECL can't use TLS");
816  assert(D->getAccess() == AS_none && "PARM_VAR_DECL can't be public/private");
817  assert(!D->isExceptionVariable() && "PARM_VAR_DECL can't be exception var");
818  assert(D->getPreviousDecl() == nullptr && "PARM_VAR_DECL can't be redecl");
819  assert(!D->isStaticDataMember() &&
820         "PARM_VAR_DECL can't be static data member");
821}
822
823void ASTDeclWriter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
824  VisitDecl(D);
825  Writer.AddStmt(D->getAsmString());
826  Writer.AddSourceLocation(D->getRParenLoc(), Record);
827  Code = serialization::DECL_FILE_SCOPE_ASM;
828}
829
830void ASTDeclWriter::VisitEmptyDecl(EmptyDecl *D) {
831  VisitDecl(D);
832  Code = serialization::DECL_EMPTY;
833}
834
835void ASTDeclWriter::VisitBlockDecl(BlockDecl *D) {
836  VisitDecl(D);
837  Writer.AddStmt(D->getBody());
838  Writer.AddTypeSourceInfo(D->getSignatureAsWritten(), Record);
839  Record.push_back(D->param_size());
840  for (FunctionDecl::param_iterator P = D->param_begin(), PEnd = D->param_end();
841       P != PEnd; ++P)
842    Writer.AddDeclRef(*P, Record);
843  Record.push_back(D->isVariadic());
844  Record.push_back(D->blockMissingReturnType());
845  Record.push_back(D->isConversionFromLambda());
846  Record.push_back(D->capturesCXXThis());
847  Record.push_back(D->getNumCaptures());
848  for (const auto &capture : D->captures()) {
849    Writer.AddDeclRef(capture.getVariable(), Record);
850
851    unsigned flags = 0;
852    if (capture.isByRef()) flags |= 1;
853    if (capture.isNested()) flags |= 2;
854    if (capture.hasCopyExpr()) flags |= 4;
855    Record.push_back(flags);
856
857    if (capture.hasCopyExpr()) Writer.AddStmt(capture.getCopyExpr());
858  }
859
860  Code = serialization::DECL_BLOCK;
861}
862
863void ASTDeclWriter::VisitCapturedDecl(CapturedDecl *CD) {
864  Record.push_back(CD->getNumParams());
865  VisitDecl(CD);
866  Record.push_back(CD->getContextParamPosition());
867  Record.push_back(CD->isNothrow() ? 1 : 0);
868  // Body is stored by VisitCapturedStmt.
869  for (unsigned I = 0; I < CD->getNumParams(); ++I)
870    Writer.AddDeclRef(CD->getParam(I), Record);
871  Code = serialization::DECL_CAPTURED;
872}
873
874void ASTDeclWriter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
875  VisitDecl(D);
876  Record.push_back(D->getLanguage());
877  Writer.AddSourceLocation(D->getExternLoc(), Record);
878  Writer.AddSourceLocation(D->getRBraceLoc(), Record);
879  Code = serialization::DECL_LINKAGE_SPEC;
880}
881
882void ASTDeclWriter::VisitLabelDecl(LabelDecl *D) {
883  VisitNamedDecl(D);
884  Writer.AddSourceLocation(D->getLocStart(), Record);
885  Code = serialization::DECL_LABEL;
886}
887
888
889void ASTDeclWriter::VisitNamespaceDecl(NamespaceDecl *D) {
890  VisitRedeclarable(D);
891  VisitNamedDecl(D);
892  Record.push_back(D->isInline());
893  Writer.AddSourceLocation(D->getLocStart(), Record);
894  Writer.AddSourceLocation(D->getRBraceLoc(), Record);
895
896  if (D->isOriginalNamespace())
897    Writer.AddDeclRef(D->getAnonymousNamespace(), Record);
898  Code = serialization::DECL_NAMESPACE;
899
900  if (Writer.hasChain() && !D->isOriginalNamespace() &&
901      D->getOriginalNamespace()->isFromASTFile()) {
902    NamespaceDecl *NS = D->getOriginalNamespace();
903    Writer.AddUpdatedDeclContext(NS);
904
905    // Make sure all visible decls are written. They will be recorded later.
906    if (StoredDeclsMap *Map = NS->buildLookup()) {
907      for (StoredDeclsMap::iterator D = Map->begin(), DEnd = Map->end();
908           D != DEnd; ++D) {
909        DeclContext::lookup_result R = D->second.getLookupResult();
910        for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E;
911             ++I)
912          Writer.GetDeclRef(*I);
913      }
914    }
915  }
916
917  if (Writer.hasChain() && D->isAnonymousNamespace() &&
918      D == D->getMostRecentDecl()) {
919    // This is a most recent reopening of the anonymous namespace. If its parent
920    // is in a previous PCH (or is the TU), mark that parent for update, because
921    // the original namespace always points to the latest re-opening of its
922    // anonymous namespace.
923    Decl *Parent = cast<Decl>(
924        D->getParent()->getRedeclContext()->getPrimaryContext());
925    if (Parent->isFromASTFile() || isa<TranslationUnitDecl>(Parent)) {
926      Writer.DeclUpdates[Parent].push_back(
927          ASTWriter::DeclUpdate(UPD_CXX_ADDED_ANONYMOUS_NAMESPACE, D));
928    }
929  }
930}
931
932void ASTDeclWriter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
933  VisitNamedDecl(D);
934  Writer.AddSourceLocation(D->getNamespaceLoc(), Record);
935  Writer.AddSourceLocation(D->getTargetNameLoc(), Record);
936  Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
937  Writer.AddDeclRef(D->getNamespace(), Record);
938  Code = serialization::DECL_NAMESPACE_ALIAS;
939}
940
941void ASTDeclWriter::VisitUsingDecl(UsingDecl *D) {
942  VisitNamedDecl(D);
943  Writer.AddSourceLocation(D->getUsingLoc(), Record);
944  Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
945  Writer.AddDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record);
946  Writer.AddDeclRef(D->FirstUsingShadow.getPointer(), Record);
947  Record.push_back(D->hasTypename());
948  Writer.AddDeclRef(Context.getInstantiatedFromUsingDecl(D), Record);
949  Code = serialization::DECL_USING;
950}
951
952void ASTDeclWriter::VisitUsingShadowDecl(UsingShadowDecl *D) {
953  VisitRedeclarable(D);
954  VisitNamedDecl(D);
955  Writer.AddDeclRef(D->getTargetDecl(), Record);
956  Writer.AddDeclRef(D->UsingOrNextShadow, Record);
957  Writer.AddDeclRef(Context.getInstantiatedFromUsingShadowDecl(D), Record);
958  Code = serialization::DECL_USING_SHADOW;
959}
960
961void ASTDeclWriter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
962  VisitNamedDecl(D);
963  Writer.AddSourceLocation(D->getUsingLoc(), Record);
964  Writer.AddSourceLocation(D->getNamespaceKeyLocation(), Record);
965  Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
966  Writer.AddDeclRef(D->getNominatedNamespace(), Record);
967  Writer.AddDeclRef(dyn_cast<Decl>(D->getCommonAncestor()), Record);
968  Code = serialization::DECL_USING_DIRECTIVE;
969}
970
971void ASTDeclWriter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
972  VisitValueDecl(D);
973  Writer.AddSourceLocation(D->getUsingLoc(), Record);
974  Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
975  Writer.AddDeclarationNameLoc(D->DNLoc, D->getDeclName(), Record);
976  Code = serialization::DECL_UNRESOLVED_USING_VALUE;
977}
978
979void ASTDeclWriter::VisitUnresolvedUsingTypenameDecl(
980                                               UnresolvedUsingTypenameDecl *D) {
981  VisitTypeDecl(D);
982  Writer.AddSourceLocation(D->getTypenameLoc(), Record);
983  Writer.AddNestedNameSpecifierLoc(D->getQualifierLoc(), Record);
984  Code = serialization::DECL_UNRESOLVED_USING_TYPENAME;
985}
986
987void ASTDeclWriter::VisitCXXRecordDecl(CXXRecordDecl *D) {
988  VisitRecordDecl(D);
989
990  enum {
991    CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
992  };
993  if (ClassTemplateDecl *TemplD = D->getDescribedClassTemplate()) {
994    Record.push_back(CXXRecTemplate);
995    Writer.AddDeclRef(TemplD, Record);
996  } else if (MemberSpecializationInfo *MSInfo
997               = D->getMemberSpecializationInfo()) {
998    Record.push_back(CXXRecMemberSpecialization);
999    Writer.AddDeclRef(MSInfo->getInstantiatedFrom(), Record);
1000    Record.push_back(MSInfo->getTemplateSpecializationKind());
1001    Writer.AddSourceLocation(MSInfo->getPointOfInstantiation(), Record);
1002  } else {
1003    Record.push_back(CXXRecNotTemplate);
1004  }
1005
1006  Record.push_back(D->isThisDeclarationADefinition());
1007  if (D->isThisDeclarationADefinition())
1008    Writer.AddCXXDefinitionData(D, Record);
1009
1010  // Store (what we currently believe to be) the key function to avoid
1011  // deserializing every method so we can compute it.
1012  if (D->IsCompleteDefinition)
1013    Writer.AddDeclRef(Context.getCurrentKeyFunction(D), Record);
1014
1015  Code = serialization::DECL_CXX_RECORD;
1016}
1017
1018void ASTDeclWriter::VisitCXXMethodDecl(CXXMethodDecl *D) {
1019  VisitFunctionDecl(D);
1020  if (D->isCanonicalDecl()) {
1021    Record.push_back(D->size_overridden_methods());
1022    for (CXXMethodDecl::method_iterator
1023           I = D->begin_overridden_methods(), E = D->end_overridden_methods();
1024           I != E; ++I)
1025      Writer.AddDeclRef(*I, Record);
1026  } else {
1027    // We only need to record overridden methods once for the canonical decl.
1028    Record.push_back(0);
1029  }
1030  Code = serialization::DECL_CXX_METHOD;
1031}
1032
1033void ASTDeclWriter::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1034  VisitCXXMethodDecl(D);
1035
1036  Writer.AddDeclRef(D->getInheritedConstructor(), Record);
1037  Record.push_back(D->IsExplicitSpecified);
1038  Writer.AddCXXCtorInitializers(D->CtorInitializers, D->NumCtorInitializers,
1039                                Record);
1040
1041  Code = serialization::DECL_CXX_CONSTRUCTOR;
1042}
1043
1044void ASTDeclWriter::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1045  VisitCXXMethodDecl(D);
1046
1047  Writer.AddDeclRef(D->OperatorDelete, Record);
1048
1049  Code = serialization::DECL_CXX_DESTRUCTOR;
1050}
1051
1052void ASTDeclWriter::VisitCXXConversionDecl(CXXConversionDecl *D) {
1053  VisitCXXMethodDecl(D);
1054  Record.push_back(D->IsExplicitSpecified);
1055  Code = serialization::DECL_CXX_CONVERSION;
1056}
1057
1058void ASTDeclWriter::VisitImportDecl(ImportDecl *D) {
1059  VisitDecl(D);
1060  Record.push_back(Writer.getSubmoduleID(D->getImportedModule()));
1061  ArrayRef<SourceLocation> IdentifierLocs = D->getIdentifierLocs();
1062  Record.push_back(!IdentifierLocs.empty());
1063  if (IdentifierLocs.empty()) {
1064    Writer.AddSourceLocation(D->getLocEnd(), Record);
1065    Record.push_back(1);
1066  } else {
1067    for (unsigned I = 0, N = IdentifierLocs.size(); I != N; ++I)
1068      Writer.AddSourceLocation(IdentifierLocs[I], Record);
1069    Record.push_back(IdentifierLocs.size());
1070  }
1071  // Note: the number of source locations must always be the last element in
1072  // the record.
1073  Code = serialization::DECL_IMPORT;
1074}
1075
1076void ASTDeclWriter::VisitAccessSpecDecl(AccessSpecDecl *D) {
1077  VisitDecl(D);
1078  Writer.AddSourceLocation(D->getColonLoc(), Record);
1079  Code = serialization::DECL_ACCESS_SPEC;
1080}
1081
1082void ASTDeclWriter::VisitFriendDecl(FriendDecl *D) {
1083  // Record the number of friend type template parameter lists here
1084  // so as to simplify memory allocation during deserialization.
1085  Record.push_back(D->NumTPLists);
1086  VisitDecl(D);
1087  bool hasFriendDecl = D->Friend.is<NamedDecl*>();
1088  Record.push_back(hasFriendDecl);
1089  if (hasFriendDecl)
1090    Writer.AddDeclRef(D->getFriendDecl(), Record);
1091  else
1092    Writer.AddTypeSourceInfo(D->getFriendType(), Record);
1093  for (unsigned i = 0; i < D->NumTPLists; ++i)
1094    Writer.AddTemplateParameterList(D->getFriendTypeTemplateParameterList(i),
1095                                    Record);
1096  Writer.AddDeclRef(D->getNextFriend(), Record);
1097  Record.push_back(D->UnsupportedFriend);
1098  Writer.AddSourceLocation(D->FriendLoc, Record);
1099  Code = serialization::DECL_FRIEND;
1100}
1101
1102void ASTDeclWriter::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1103  VisitDecl(D);
1104  Record.push_back(D->getNumTemplateParameters());
1105  for (unsigned i = 0, e = D->getNumTemplateParameters(); i != e; ++i)
1106    Writer.AddTemplateParameterList(D->getTemplateParameterList(i), Record);
1107  Record.push_back(D->getFriendDecl() != nullptr);
1108  if (D->getFriendDecl())
1109    Writer.AddDeclRef(D->getFriendDecl(), Record);
1110  else
1111    Writer.AddTypeSourceInfo(D->getFriendType(), Record);
1112  Writer.AddSourceLocation(D->getFriendLoc(), Record);
1113  Code = serialization::DECL_FRIEND_TEMPLATE;
1114}
1115
1116void ASTDeclWriter::VisitTemplateDecl(TemplateDecl *D) {
1117  VisitNamedDecl(D);
1118
1119  Writer.AddDeclRef(D->getTemplatedDecl(), Record);
1120  Writer.AddTemplateParameterList(D->getTemplateParameters(), Record);
1121}
1122
1123void ASTDeclWriter::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1124  VisitRedeclarable(D);
1125
1126  // Emit data to initialize CommonOrPrev before VisitTemplateDecl so that
1127  // getCommonPtr() can be used while this is still initializing.
1128  if (D->isFirstDecl()) {
1129    // This declaration owns the 'common' pointer, so serialize that data now.
1130    Writer.AddDeclRef(D->getInstantiatedFromMemberTemplate(), Record);
1131    if (D->getInstantiatedFromMemberTemplate())
1132      Record.push_back(D->isMemberSpecialization());
1133  }
1134
1135  VisitTemplateDecl(D);
1136  Record.push_back(D->getIdentifierNamespace());
1137}
1138
1139void ASTDeclWriter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1140  VisitRedeclarableTemplateDecl(D);
1141
1142  if (D->isFirstDecl()) {
1143    typedef llvm::FoldingSetVector<ClassTemplateSpecializationDecl> CTSDSetTy;
1144    CTSDSetTy &CTSDSet = D->getSpecializations();
1145    Record.push_back(CTSDSet.size());
1146    for (CTSDSetTy::iterator I=CTSDSet.begin(), E = CTSDSet.end(); I!=E; ++I) {
1147      assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
1148      Writer.AddDeclRef(&*I, Record);
1149    }
1150
1151    typedef llvm::FoldingSetVector<ClassTemplatePartialSpecializationDecl>
1152      CTPSDSetTy;
1153    CTPSDSetTy &CTPSDSet = D->getPartialSpecializations();
1154    Record.push_back(CTPSDSet.size());
1155    for (CTPSDSetTy::iterator I=CTPSDSet.begin(), E=CTPSDSet.end(); I!=E; ++I) {
1156      assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
1157      Writer.AddDeclRef(&*I, Record);
1158    }
1159  }
1160  Code = serialization::DECL_CLASS_TEMPLATE;
1161}
1162
1163void ASTDeclWriter::VisitClassTemplateSpecializationDecl(
1164                                           ClassTemplateSpecializationDecl *D) {
1165  VisitCXXRecordDecl(D);
1166
1167  llvm::PointerUnion<ClassTemplateDecl *,
1168                     ClassTemplatePartialSpecializationDecl *> InstFrom
1169    = D->getSpecializedTemplateOrPartial();
1170  if (Decl *InstFromD = InstFrom.dyn_cast<ClassTemplateDecl *>()) {
1171    Writer.AddDeclRef(InstFromD, Record);
1172  } else {
1173    Writer.AddDeclRef(InstFrom.get<ClassTemplatePartialSpecializationDecl *>(),
1174                      Record);
1175    Writer.AddTemplateArgumentList(&D->getTemplateInstantiationArgs(), Record);
1176  }
1177
1178  Writer.AddTemplateArgumentList(&D->getTemplateArgs(), Record);
1179  Writer.AddSourceLocation(D->getPointOfInstantiation(), Record);
1180  Record.push_back(D->getSpecializationKind());
1181  Record.push_back(D->isCanonicalDecl());
1182
1183  if (D->isCanonicalDecl()) {
1184    // When reading, we'll add it to the folding set of the following template.
1185    Writer.AddDeclRef(D->getSpecializedTemplate()->getCanonicalDecl(), Record);
1186  }
1187
1188  // Explicit info.
1189  Writer.AddTypeSourceInfo(D->getTypeAsWritten(), Record);
1190  if (D->getTypeAsWritten()) {
1191    Writer.AddSourceLocation(D->getExternLoc(), Record);
1192    Writer.AddSourceLocation(D->getTemplateKeywordLoc(), Record);
1193  }
1194
1195  Code = serialization::DECL_CLASS_TEMPLATE_SPECIALIZATION;
1196}
1197
1198void ASTDeclWriter::VisitClassTemplatePartialSpecializationDecl(
1199                                    ClassTemplatePartialSpecializationDecl *D) {
1200  VisitClassTemplateSpecializationDecl(D);
1201
1202  Writer.AddTemplateParameterList(D->getTemplateParameters(), Record);
1203  Writer.AddASTTemplateArgumentListInfo(D->getTemplateArgsAsWritten(), Record);
1204
1205  // These are read/set from/to the first declaration.
1206  if (D->getPreviousDecl() == nullptr) {
1207    Writer.AddDeclRef(D->getInstantiatedFromMember(), Record);
1208    Record.push_back(D->isMemberSpecialization());
1209  }
1210
1211  Code = serialization::DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION;
1212}
1213
1214void ASTDeclWriter::VisitVarTemplateDecl(VarTemplateDecl *D) {
1215  VisitRedeclarableTemplateDecl(D);
1216
1217  if (D->isFirstDecl()) {
1218    typedef llvm::FoldingSetVector<VarTemplateSpecializationDecl> VTSDSetTy;
1219    VTSDSetTy &VTSDSet = D->getSpecializations();
1220    Record.push_back(VTSDSet.size());
1221    for (VTSDSetTy::iterator I = VTSDSet.begin(), E = VTSDSet.end(); I != E;
1222         ++I) {
1223      assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
1224      Writer.AddDeclRef(&*I, Record);
1225    }
1226
1227    typedef llvm::FoldingSetVector<VarTemplatePartialSpecializationDecl>
1228    VTPSDSetTy;
1229    VTPSDSetTy &VTPSDSet = D->getPartialSpecializations();
1230    Record.push_back(VTPSDSet.size());
1231    for (VTPSDSetTy::iterator I = VTPSDSet.begin(), E = VTPSDSet.end(); I != E;
1232         ++I) {
1233      assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
1234      Writer.AddDeclRef(&*I, Record);
1235    }
1236  }
1237  Code = serialization::DECL_VAR_TEMPLATE;
1238}
1239
1240void ASTDeclWriter::VisitVarTemplateSpecializationDecl(
1241    VarTemplateSpecializationDecl *D) {
1242  VisitVarDecl(D);
1243
1244  llvm::PointerUnion<VarTemplateDecl *, VarTemplatePartialSpecializationDecl *>
1245  InstFrom = D->getSpecializedTemplateOrPartial();
1246  if (Decl *InstFromD = InstFrom.dyn_cast<VarTemplateDecl *>()) {
1247    Writer.AddDeclRef(InstFromD, Record);
1248  } else {
1249    Writer.AddDeclRef(InstFrom.get<VarTemplatePartialSpecializationDecl *>(),
1250                      Record);
1251    Writer.AddTemplateArgumentList(&D->getTemplateInstantiationArgs(), Record);
1252  }
1253
1254  // Explicit info.
1255  Writer.AddTypeSourceInfo(D->getTypeAsWritten(), Record);
1256  if (D->getTypeAsWritten()) {
1257    Writer.AddSourceLocation(D->getExternLoc(), Record);
1258    Writer.AddSourceLocation(D->getTemplateKeywordLoc(), Record);
1259  }
1260
1261  Writer.AddTemplateArgumentList(&D->getTemplateArgs(), Record);
1262  Writer.AddSourceLocation(D->getPointOfInstantiation(), Record);
1263  Record.push_back(D->getSpecializationKind());
1264  Record.push_back(D->isCanonicalDecl());
1265
1266  if (D->isCanonicalDecl()) {
1267    // When reading, we'll add it to the folding set of the following template.
1268    Writer.AddDeclRef(D->getSpecializedTemplate()->getCanonicalDecl(), Record);
1269  }
1270
1271  Code = serialization::DECL_VAR_TEMPLATE_SPECIALIZATION;
1272}
1273
1274void ASTDeclWriter::VisitVarTemplatePartialSpecializationDecl(
1275    VarTemplatePartialSpecializationDecl *D) {
1276  VisitVarTemplateSpecializationDecl(D);
1277
1278  Writer.AddTemplateParameterList(D->getTemplateParameters(), Record);
1279  Writer.AddASTTemplateArgumentListInfo(D->getTemplateArgsAsWritten(), Record);
1280
1281  // These are read/set from/to the first declaration.
1282  if (D->getPreviousDecl() == nullptr) {
1283    Writer.AddDeclRef(D->getInstantiatedFromMember(), Record);
1284    Record.push_back(D->isMemberSpecialization());
1285  }
1286
1287  Code = serialization::DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION;
1288}
1289
1290void ASTDeclWriter::VisitClassScopeFunctionSpecializationDecl(
1291                                    ClassScopeFunctionSpecializationDecl *D) {
1292  VisitDecl(D);
1293  Writer.AddDeclRef(D->getSpecialization(), Record);
1294  Code = serialization::DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION;
1295}
1296
1297
1298void ASTDeclWriter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1299  VisitRedeclarableTemplateDecl(D);
1300
1301  if (D->isFirstDecl()) {
1302    // This FunctionTemplateDecl owns the CommonPtr; write it.
1303
1304    // Write the function specialization declarations.
1305    Record.push_back(D->getSpecializations().size());
1306    for (llvm::FoldingSetVector<FunctionTemplateSpecializationInfo>::iterator
1307           I = D->getSpecializations().begin(),
1308           E = D->getSpecializations().end()   ; I != E; ++I) {
1309      assert(I->Function->isCanonicalDecl() &&
1310             "Expected only canonical decls in set");
1311      Writer.AddDeclRef(I->Function, Record);
1312    }
1313  }
1314  Code = serialization::DECL_FUNCTION_TEMPLATE;
1315}
1316
1317void ASTDeclWriter::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
1318  VisitTypeDecl(D);
1319
1320  Record.push_back(D->wasDeclaredWithTypename());
1321  Record.push_back(D->defaultArgumentWasInherited());
1322  Writer.AddTypeSourceInfo(D->getDefaultArgumentInfo(), Record);
1323
1324  Code = serialization::DECL_TEMPLATE_TYPE_PARM;
1325}
1326
1327void ASTDeclWriter::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
1328  // For an expanded parameter pack, record the number of expansion types here
1329  // so that it's easier for deserialization to allocate the right amount of
1330  // memory.
1331  if (D->isExpandedParameterPack())
1332    Record.push_back(D->getNumExpansionTypes());
1333
1334  VisitDeclaratorDecl(D);
1335  // TemplateParmPosition.
1336  Record.push_back(D->getDepth());
1337  Record.push_back(D->getPosition());
1338
1339  if (D->isExpandedParameterPack()) {
1340    for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
1341      Writer.AddTypeRef(D->getExpansionType(I), Record);
1342      Writer.AddTypeSourceInfo(D->getExpansionTypeSourceInfo(I), Record);
1343    }
1344
1345    Code = serialization::DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK;
1346  } else {
1347    // Rest of NonTypeTemplateParmDecl.
1348    Record.push_back(D->isParameterPack());
1349    Record.push_back(D->getDefaultArgument() != nullptr);
1350    if (D->getDefaultArgument()) {
1351      Writer.AddStmt(D->getDefaultArgument());
1352      Record.push_back(D->defaultArgumentWasInherited());
1353    }
1354    Code = serialization::DECL_NON_TYPE_TEMPLATE_PARM;
1355  }
1356}
1357
1358void ASTDeclWriter::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
1359  // For an expanded parameter pack, record the number of expansion types here
1360  // so that it's easier for deserialization to allocate the right amount of
1361  // memory.
1362  if (D->isExpandedParameterPack())
1363    Record.push_back(D->getNumExpansionTemplateParameters());
1364
1365  VisitTemplateDecl(D);
1366  // TemplateParmPosition.
1367  Record.push_back(D->getDepth());
1368  Record.push_back(D->getPosition());
1369
1370  if (D->isExpandedParameterPack()) {
1371    for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
1372         I != N; ++I)
1373      Writer.AddTemplateParameterList(D->getExpansionTemplateParameters(I),
1374                                      Record);
1375    Code = serialization::DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK;
1376  } else {
1377    // Rest of TemplateTemplateParmDecl.
1378    Writer.AddTemplateArgumentLoc(D->getDefaultArgument(), Record);
1379    Record.push_back(D->defaultArgumentWasInherited());
1380    Record.push_back(D->isParameterPack());
1381    Code = serialization::DECL_TEMPLATE_TEMPLATE_PARM;
1382  }
1383}
1384
1385void ASTDeclWriter::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
1386  VisitRedeclarableTemplateDecl(D);
1387  Code = serialization::DECL_TYPE_ALIAS_TEMPLATE;
1388}
1389
1390void ASTDeclWriter::VisitStaticAssertDecl(StaticAssertDecl *D) {
1391  VisitDecl(D);
1392  Writer.AddStmt(D->getAssertExpr());
1393  Record.push_back(D->isFailed());
1394  Writer.AddStmt(D->getMessage());
1395  Writer.AddSourceLocation(D->getRParenLoc(), Record);
1396  Code = serialization::DECL_STATIC_ASSERT;
1397}
1398
1399/// \brief Emit the DeclContext part of a declaration context decl.
1400///
1401/// \param LexicalOffset the offset at which the DECL_CONTEXT_LEXICAL
1402/// block for this declaration context is stored. May be 0 to indicate
1403/// that there are no declarations stored within this context.
1404///
1405/// \param VisibleOffset the offset at which the DECL_CONTEXT_VISIBLE
1406/// block for this declaration context is stored. May be 0 to indicate
1407/// that there are no declarations visible from this context. Note
1408/// that this value will not be emitted for non-primary declaration
1409/// contexts.
1410void ASTDeclWriter::VisitDeclContext(DeclContext *DC, uint64_t LexicalOffset,
1411                                     uint64_t VisibleOffset) {
1412  Record.push_back(LexicalOffset);
1413  Record.push_back(VisibleOffset);
1414}
1415
1416template <typename T>
1417void ASTDeclWriter::VisitRedeclarable(Redeclarable<T> *D) {
1418  T *First = D->getFirstDecl();
1419  if (First->getMostRecentDecl() != First) {
1420    assert(isRedeclarableDeclKind(static_cast<T *>(D)->getKind()) &&
1421           "Not considered redeclarable?");
1422
1423    // There is more than one declaration of this entity, so we will need to
1424    // write a redeclaration chain.
1425    Writer.AddDeclRef(First, Record);
1426    Writer.Redeclarations.insert(First);
1427
1428    // Make sure that we serialize both the previous and the most-recent
1429    // declarations, which (transitively) ensures that all declarations in the
1430    // chain get serialized.
1431    (void)Writer.GetDeclRef(D->getPreviousDecl());
1432    (void)Writer.GetDeclRef(First->getMostRecentDecl());
1433  } else {
1434    // We use the sentinel value 0 to indicate an only declaration.
1435    Record.push_back(0);
1436  }
1437
1438}
1439
1440void ASTDeclWriter::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
1441  Record.push_back(D->varlist_size());
1442  VisitDecl(D);
1443  for (auto *I : D->varlists())
1444    Writer.AddStmt(I);
1445  Code = serialization::DECL_OMP_THREADPRIVATE;
1446}
1447
1448//===----------------------------------------------------------------------===//
1449// ASTWriter Implementation
1450//===----------------------------------------------------------------------===//
1451
1452void ASTWriter::WriteDeclsBlockAbbrevs() {
1453  using namespace llvm;
1454
1455  BitCodeAbbrev *Abv;
1456
1457  // Abbreviation for DECL_FIELD
1458  Abv = new BitCodeAbbrev();
1459  Abv->Add(BitCodeAbbrevOp(serialization::DECL_FIELD));
1460  // Decl
1461  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1462  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1463  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1464  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1465  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1466  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1467  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1468  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1469  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2));  // AccessSpecifier
1470  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1471  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1472  // NamedDecl
1473  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1474  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1475  // ValueDecl
1476  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1477  // DeclaratorDecl
1478  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1479  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1480  // FieldDecl
1481  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
1482  Abv->Add(BitCodeAbbrevOp(0));                       //getBitWidth
1483  // Type Source Info
1484  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1485  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1486  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1487  DeclFieldAbbrev = Stream.EmitAbbrev(Abv);
1488
1489  // Abbreviation for DECL_OBJC_IVAR
1490  Abv = new BitCodeAbbrev();
1491  Abv->Add(BitCodeAbbrevOp(serialization::DECL_OBJC_IVAR));
1492  // Decl
1493  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1494  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1495  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1496  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1497  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1498  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1499  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1500  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1501  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2));  // AccessSpecifier
1502  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1503  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1504  // NamedDecl
1505  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1506  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1507  // ValueDecl
1508  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1509  // DeclaratorDecl
1510  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1511  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1512  // FieldDecl
1513  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
1514  Abv->Add(BitCodeAbbrevOp(0));                       //getBitWidth
1515  // ObjC Ivar
1516  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getAccessControl
1517  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getSynthesize
1518  // Type Source Info
1519  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1520  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1521  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1522  DeclObjCIvarAbbrev = Stream.EmitAbbrev(Abv);
1523
1524  // Abbreviation for DECL_ENUM
1525  Abv = new BitCodeAbbrev();
1526  Abv->Add(BitCodeAbbrevOp(serialization::DECL_ENUM));
1527  // Redeclarable
1528  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1529  // Decl
1530  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1531  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1532  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1533  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1534  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1535  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1536  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1537  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1538  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1539  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1540  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1541  // NamedDecl
1542  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1543  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1544  // TypeDecl
1545  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1546  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1547  // TagDecl
1548  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IdentifierNamespace
1549  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getTagKind
1550  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCompleteDefinition
1551  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // EmbeddedInDeclarator
1552  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFreeStanding
1553  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsCompleteDefinitionRequired
1554  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // SourceLocation
1555  Abv->Add(BitCodeAbbrevOp(0));                         // hasExtInfo
1556  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // TypedefNameAnonDecl
1557  // EnumDecl
1558  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // AddTypeRef
1559  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IntegerType
1560  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getPromotionType
1561  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getNumPositiveBits
1562  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getNumNegativeBits
1563  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isScoped
1564  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isScopedUsingClassTag
1565  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isFixed
1566  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // InstantiatedMembEnum
1567  // DC
1568  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // LexicalOffset
1569  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // VisibleOffset
1570  DeclEnumAbbrev = Stream.EmitAbbrev(Abv);
1571
1572  // Abbreviation for DECL_RECORD
1573  Abv = new BitCodeAbbrev();
1574  Abv->Add(BitCodeAbbrevOp(serialization::DECL_RECORD));
1575  // Redeclarable
1576  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1577  // Decl
1578  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1579  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1580  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1581  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1582  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1583  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1584  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1585  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1586  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1587  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1588  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1589  // NamedDecl
1590  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1591  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1592  // TypeDecl
1593  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1594  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1595  // TagDecl
1596  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IdentifierNamespace
1597  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getTagKind
1598  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCompleteDefinition
1599  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // EmbeddedInDeclarator
1600  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFreeStanding
1601  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsCompleteDefinitionRequired
1602  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // SourceLocation
1603  Abv->Add(BitCodeAbbrevOp(0));                         // hasExtInfo
1604  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // TypedefNameAnonDecl
1605  // RecordDecl
1606  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // FlexibleArrayMember
1607  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // AnonymousStructUnion
1608  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // hasObjectMember
1609  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // hasVolatileMember
1610  // DC
1611  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // LexicalOffset
1612  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // VisibleOffset
1613  DeclRecordAbbrev = Stream.EmitAbbrev(Abv);
1614
1615  // Abbreviation for DECL_PARM_VAR
1616  Abv = new BitCodeAbbrev();
1617  Abv->Add(BitCodeAbbrevOp(serialization::DECL_PARM_VAR));
1618  // Redeclarable
1619  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1620  // Decl
1621  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1622  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1623  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1624  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1625  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1626  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1627  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1628  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1629  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1630  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1631  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1632  // NamedDecl
1633  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1634  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1635  // ValueDecl
1636  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1637  // DeclaratorDecl
1638  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1639  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1640  // VarDecl
1641  Abv->Add(BitCodeAbbrevOp(0));                       // StorageClass
1642  Abv->Add(BitCodeAbbrevOp(0));                       // getTSCSpec
1643  Abv->Add(BitCodeAbbrevOp(0));                       // hasCXXDirectInitializer
1644  Abv->Add(BitCodeAbbrevOp(0));                       // isExceptionVariable
1645  Abv->Add(BitCodeAbbrevOp(0));                       // isNRVOVariable
1646  Abv->Add(BitCodeAbbrevOp(0));                       // isCXXForRangeDecl
1647  Abv->Add(BitCodeAbbrevOp(0));                       // isARCPseudoStrong
1648  Abv->Add(BitCodeAbbrevOp(0));                       // isConstexpr
1649  Abv->Add(BitCodeAbbrevOp(0));                       // isInitCapture
1650  Abv->Add(BitCodeAbbrevOp(0));                       // isPrevDeclInSameScope
1651  Abv->Add(BitCodeAbbrevOp(0));                       // Linkage
1652  Abv->Add(BitCodeAbbrevOp(0));                       // HasInit
1653  Abv->Add(BitCodeAbbrevOp(0));                   // HasMemberSpecializationInfo
1654  // ParmVarDecl
1655  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsObjCMethodParameter
1656  Abv->Add(BitCodeAbbrevOp(0));                       // ScopeDepth
1657  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ScopeIndex
1658  Abv->Add(BitCodeAbbrevOp(0));                       // ObjCDeclQualifier
1659  Abv->Add(BitCodeAbbrevOp(0));                       // KNRPromoted
1660  Abv->Add(BitCodeAbbrevOp(0));                       // HasInheritedDefaultArg
1661  Abv->Add(BitCodeAbbrevOp(0));                   // HasUninstantiatedDefaultArg
1662  // Type Source Info
1663  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1664  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1665  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1666  DeclParmVarAbbrev = Stream.EmitAbbrev(Abv);
1667
1668  // Abbreviation for DECL_TYPEDEF
1669  Abv = new BitCodeAbbrev();
1670  Abv->Add(BitCodeAbbrevOp(serialization::DECL_TYPEDEF));
1671  // Redeclarable
1672  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1673  // Decl
1674  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1675  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1676  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1677  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1678  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1679  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1680  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1681  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1682  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1683  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1684  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1685  // NamedDecl
1686  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1687  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1688  // TypeDecl
1689  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
1690  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
1691  // TypedefDecl
1692  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1693  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1694  DeclTypedefAbbrev = Stream.EmitAbbrev(Abv);
1695
1696  // Abbreviation for DECL_VAR
1697  Abv = new BitCodeAbbrev();
1698  Abv->Add(BitCodeAbbrevOp(serialization::DECL_VAR));
1699  // Redeclarable
1700  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
1701  // Decl
1702  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
1703  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
1704  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl
1705  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
1706  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
1707  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
1708  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
1709  Abv->Add(BitCodeAbbrevOp(0));                   // TopLevelDeclInObjCContainer
1710  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
1711  Abv->Add(BitCodeAbbrevOp(0));                       // ModulePrivate
1712  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
1713  // NamedDecl
1714  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
1715  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
1716  // ValueDecl
1717  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1718  // DeclaratorDecl
1719  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
1720  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
1721  // VarDecl
1722  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // StorageClass
1723  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // getTSCSpec
1724  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // CXXDirectInitializer
1725  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isExceptionVariable
1726  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isNRVOVariable
1727  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCXXForRangeDecl
1728  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isARCPseudoStrong
1729  Abv->Add(BitCodeAbbrevOp(0));                         // isConstexpr
1730  Abv->Add(BitCodeAbbrevOp(0));                         // isInitCapture
1731  Abv->Add(BitCodeAbbrevOp(0));                         // isPrevDeclInSameScope
1732  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); // Linkage
1733  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // HasInit
1734  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // HasMemberSpecInfo
1735  // Type Source Info
1736  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1737  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1738  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
1739  DeclVarAbbrev = Stream.EmitAbbrev(Abv);
1740
1741  // Abbreviation for EXPR_DECL_REF
1742  Abv = new BitCodeAbbrev();
1743  Abv->Add(BitCodeAbbrevOp(serialization::EXPR_DECL_REF));
1744  //Stmt
1745  //Expr
1746  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1747  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1748  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1749  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1750  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1751  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1752  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1753  //DeclRefExpr
1754  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //HasQualifier
1755  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //GetDeclFound
1756  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ExplicitTemplateArgs
1757  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //HadMultipleCandidates
1758  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //RefersToEnclosingLocal
1759  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclRef
1760  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1761  DeclRefExprAbbrev = Stream.EmitAbbrev(Abv);
1762
1763  // Abbreviation for EXPR_INTEGER_LITERAL
1764  Abv = new BitCodeAbbrev();
1765  Abv->Add(BitCodeAbbrevOp(serialization::EXPR_INTEGER_LITERAL));
1766  //Stmt
1767  //Expr
1768  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1769  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1770  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1771  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1772  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1773  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1774  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1775  //Integer Literal
1776  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1777  Abv->Add(BitCodeAbbrevOp(32));                      // Bit Width
1778  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Value
1779  IntegerLiteralAbbrev = Stream.EmitAbbrev(Abv);
1780
1781  // Abbreviation for EXPR_CHARACTER_LITERAL
1782  Abv = new BitCodeAbbrev();
1783  Abv->Add(BitCodeAbbrevOp(serialization::EXPR_CHARACTER_LITERAL));
1784  //Stmt
1785  //Expr
1786  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
1787  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //TypeDependent
1788  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //ValueDependent
1789  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //InstantiationDependent
1790  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //UnexpandedParamPack
1791  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetValueKind
1792  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); //GetObjectKind
1793  //Character Literal
1794  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getValue
1795  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
1796  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // getKind
1797  CharacterLiteralAbbrev = Stream.EmitAbbrev(Abv);
1798
1799  Abv = new BitCodeAbbrev();
1800  Abv->Add(BitCodeAbbrevOp(serialization::DECL_CONTEXT_LEXICAL));
1801  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
1802  DeclContextLexicalAbbrev = Stream.EmitAbbrev(Abv);
1803
1804  Abv = new BitCodeAbbrev();
1805  Abv->Add(BitCodeAbbrevOp(serialization::DECL_CONTEXT_VISIBLE));
1806  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
1807  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
1808  DeclContextVisibleLookupAbbrev = Stream.EmitAbbrev(Abv);
1809}
1810
1811/// isRequiredDecl - Check if this is a "required" Decl, which must be seen by
1812/// consumers of the AST.
1813///
1814/// Such decls will always be deserialized from the AST file, so we would like
1815/// this to be as restrictive as possible. Currently the predicate is driven by
1816/// code generation requirements, if other clients have a different notion of
1817/// what is "required" then we may have to consider an alternate scheme where
1818/// clients can iterate over the top-level decls and get information on them,
1819/// without necessary deserializing them. We could explicitly require such
1820/// clients to use a separate API call to "realize" the decl. This should be
1821/// relatively painless since they would presumably only do it for top-level
1822/// decls.
1823static bool isRequiredDecl(const Decl *D, ASTContext &Context) {
1824  // An ObjCMethodDecl is never considered as "required" because its
1825  // implementation container always is.
1826
1827  // File scoped assembly or obj-c implementation must be seen. ImportDecl is
1828  // used by codegen to determine the set of imported modules to search for
1829  // inputs for automatic linking.
1830  if (isa<FileScopeAsmDecl>(D) || isa<ObjCImplDecl>(D) || isa<ImportDecl>(D))
1831    return true;
1832
1833  return Context.DeclMustBeEmitted(D);
1834}
1835
1836void ASTWriter::WriteDecl(ASTContext &Context, Decl *D) {
1837  // Switch case IDs are per Decl.
1838  ClearSwitchCaseIDs();
1839
1840  RecordData Record;
1841  ASTDeclWriter W(*this, Context, Record);
1842
1843  // Determine the ID for this declaration.
1844  serialization::DeclID ID;
1845  if (D->isFromASTFile())
1846    ID = getDeclID(D);
1847  else {
1848    serialization::DeclID &IDR = DeclIDs[D];
1849    if (IDR == 0)
1850      IDR = NextDeclID++;
1851
1852    ID= IDR;
1853  }
1854
1855  bool isReplacingADecl = ID < FirstDeclID;
1856
1857  // If this declaration is also a DeclContext, write blocks for the
1858  // declarations that lexically stored inside its context and those
1859  // declarations that are visible from its context. These blocks
1860  // are written before the declaration itself so that we can put
1861  // their offsets into the record for the declaration.
1862  uint64_t LexicalOffset = 0;
1863  uint64_t VisibleOffset = 0;
1864  DeclContext *DC = dyn_cast<DeclContext>(D);
1865  if (DC) {
1866    if (isReplacingADecl) {
1867      // It is replacing a decl from a chained PCH; make sure that the
1868      // DeclContext is fully loaded.
1869      if (DC->hasExternalLexicalStorage())
1870        DC->LoadLexicalDeclsFromExternalStorage();
1871      if (DC->hasExternalVisibleStorage())
1872        Chain->completeVisibleDeclsMap(DC);
1873    }
1874    LexicalOffset = WriteDeclContextLexicalBlock(Context, DC);
1875    VisibleOffset = WriteDeclContextVisibleBlock(Context, DC);
1876  }
1877
1878  if (isReplacingADecl) {
1879    // We're replacing a decl in a previous file.
1880    ReplacedDecls.push_back(ReplacedDeclInfo(ID, Stream.GetCurrentBitNo(),
1881                                             D->getLocation()));
1882  } else {
1883    unsigned Index = ID - FirstDeclID;
1884
1885    // Record the offset for this declaration
1886    SourceLocation Loc = D->getLocation();
1887    if (DeclOffsets.size() == Index)
1888      DeclOffsets.push_back(DeclOffset(Loc, Stream.GetCurrentBitNo()));
1889    else if (DeclOffsets.size() < Index) {
1890      DeclOffsets.resize(Index+1);
1891      DeclOffsets[Index].setLocation(Loc);
1892      DeclOffsets[Index].BitOffset = Stream.GetCurrentBitNo();
1893    }
1894
1895    SourceManager &SM = Context.getSourceManager();
1896    if (Loc.isValid() && SM.isLocalSourceLocation(Loc))
1897      associateDeclWithFile(D, ID);
1898  }
1899
1900  // Build and emit a record for this declaration
1901  Record.clear();
1902  W.Code = (serialization::DeclCode)0;
1903  W.AbbrevToUse = 0;
1904  W.Visit(D);
1905  if (DC) W.VisitDeclContext(DC, LexicalOffset, VisibleOffset);
1906
1907  if (!W.Code)
1908    llvm::report_fatal_error(StringRef("unexpected declaration kind '") +
1909                            D->getDeclKindName() + "'");
1910  Stream.EmitRecord(W.Code, Record, W.AbbrevToUse);
1911
1912  // Flush any expressions that were written as part of this declaration.
1913  FlushStmts();
1914
1915  // Flush C++ base specifiers, if there are any.
1916  FlushCXXBaseSpecifiers();
1917
1918  // Note declarations that should be deserialized eagerly so that we can add
1919  // them to a record in the AST file later.
1920  if (isRequiredDecl(D, Context))
1921    EagerlyDeserializedDecls.push_back(ID);
1922}
1923
1924void ASTWriter::AddFunctionDefinition(const FunctionDecl *FD,
1925                                      RecordData &Record) {
1926  ClearSwitchCaseIDs();
1927
1928  ASTDeclWriter W(*this, FD->getASTContext(), Record);
1929  W.AddFunctionDefinition(FD);
1930}
1931