Improvements to abbreviations for PCH which add support for EnumDecl, ObjCIvarDecl, TypedefDecl, VarDecl and FieldDecl and improve support for ParmVarDecl.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132604 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 258 insertions, 35 deletions

diff --git a/lib/Serialization/ASTReaderDecl.cpp b/lib/Serialization/ASTReaderDecl.cpp
index feafe6f89e..d2b014842c 100644
--- a/lib/Serialization/ASTReaderDecl.cpp
+++ b/lib/Serialization/ASTReaderDecl.cpp
@@ -174,6 +174,18 @@ uint64_t ASTDeclReader::GetCurrentCursorOffset() {
 void ASTDeclReader::Visit(Decl *D) {
   DeclVisitor<ASTDeclReader, void>::Visit(D);
 
+  if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) {
+    if (DD->DeclInfo) {
+      DeclaratorDecl::ExtInfo *Info =
+          DD->DeclInfo.get<DeclaratorDecl::ExtInfo *>();
+      Info->TInfo =
+          GetTypeSourceInfo(Record, Idx);
+    }
+    else {
+      DD->DeclInfo = GetTypeSourceInfo(Record, Idx);
+    }
+  }
+
   if (TypeDecl *TD = dyn_cast<TypeDecl>(D)) {
     // if we have a fully initialized TypeDecl, we can safely read its type now.
     TD->setTypeForDecl(Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull());
@@ -308,10 +320,8 @@ void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
     DeclaratorDecl::ExtInfo *Info
         = new (*Reader.getContext()) DeclaratorDecl::ExtInfo();
     ReadQualifierInfo(*Info, Record, Idx);
-    Info->TInfo = GetTypeSourceInfo(Record, Idx);
     DD->DeclInfo = Info;
-  } else
-    DD->DeclInfo = GetTypeSourceInfo(Record, Idx);
+  }
 }
 
 void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
diff --git a/lib/Serialization/ASTWriter.cpp b/lib/Serialization/ASTWriter.cpp
index 89a6b7606e..194d6c31cf 100644
--- a/lib/Serialization/ASTWriter.cpp
+++ b/lib/Serialization/ASTWriter.cpp
@@ -2703,11 +2703,13 @@ ASTWriter::ASTWriter(llvm::BitstreamWriter &Stream)
     NumStatements(0), NumMacros(0), NumLexicalDeclContexts(0),
     NumVisibleDeclContexts(0),
     FirstCXXBaseSpecifiersID(1), NextCXXBaseSpecifiersID(1),
-    ParmVarDeclAbbrev(0), DeclContextLexicalAbbrev(0),
+    DeclParmVarAbbrev(0), DeclContextLexicalAbbrev(0),
     DeclContextVisibleLookupAbbrev(0), UpdateVisibleAbbrev(0),
     DeclRefExprAbbrev(0), CharacterLiteralAbbrev(0),
     DeclRecordAbbrev(0), IntegerLiteralAbbrev(0),
-    EnumConstantDeclAbbrev(0)
+    DeclTypedefAbbrev(0),
+    DeclVarAbbrev(0), DeclFieldAbbrev(0),
+    DeclEnumAbbrev(0), DeclObjCIvarAbbrev(0)
 {
 }
 
diff --git a/lib/Serialization/ASTWriterDecl.cpp b/lib/Serialization/ASTWriterDecl.cpp
index 26ea1ad79b..0e1157a910 100644
--- a/lib/Serialization/ASTWriterDecl.cpp
+++ b/lib/Serialization/ASTWriterDecl.cpp
@@ -124,6 +124,13 @@ namespace clang {
 void ASTDeclWriter::Visit(Decl *D) {
   DeclVisitor<ASTDeclWriter>::Visit(D);
 
+  // Source locations require array (variable-length) abbreviations.  The
+  // abbreviation infrastructure requires that arrays are encoded last, so
+  // we handle it here in the case of those classes derived from DeclaratorDecl
+  if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)){
+    Writer.AddTypeSourceInfo(DD->getTypeSourceInfo(), Record);
+  }
+
   // Handle FunctionDecl's body here and write it after all other Stmts/Exprs
   // have been written. We want it last because we will not read it back when
   // retrieving it from the AST, we'll just lazily set the offset. 
@@ -169,6 +176,18 @@ void ASTDeclWriter::VisitTypeDecl(TypeDecl *D) {
 void ASTDeclWriter::VisitTypedefDecl(TypedefDecl *D) {
   VisitTypeDecl(D);
   Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
+
+  if (!D->hasAttrs() &&
+      !D->isImplicit() &&
+      !D->isUsed(false) &&
+      D->getPCHLevel() == 0 &&
+      D->RedeclLink.getNext() == D &&
+      !D->isInvalidDecl() &&
+      !D->isReferenced() &&
+      D->getAccess() == AS_none &&
+      D->getDeclName().getNameKind() == DeclarationName::Identifier)
+    AbbrevToUse = Writer.getDeclTypedefAbbrev();
+
   Code = serialization::DECL_TYPEDEF;
 }
 
@@ -205,6 +224,21 @@ void ASTDeclWriter::VisitEnumDecl(EnumDecl *D) {
   Record.push_back(D->isScopedUsingClassTag());
   Record.push_back(D->isFixed());
   Writer.AddDeclRef(D->getInstantiatedFromMemberEnum(), Record);
+
+  if (!D->hasAttrs() &&
+      !D->isImplicit() &&
+      !D->isUsed(false) &&
+      D->getPCHLevel() == 0 &&
+      !D->hasExtInfo() &&
+      D->RedeclLink.getNext() == D &&
+      !D->isInvalidDecl() &&
+      !D->isReferenced() &&
+      D->getAccess() == AS_none &&
+      !CXXRecordDecl::classofKind(D->getKind()) &&
+      !D->getIntegerTypeSourceInfo() &&
+      D->getDeclName().getNameKind() == DeclarationName::Identifier)
+    AbbrevToUse = Writer.getDeclEnumAbbrev();
+
   Code = serialization::DECL_ENUM;
 }
 
@@ -225,7 +259,6 @@ void ASTDeclWriter::VisitRecordDecl(RecordDecl *D) {
       D->getAccess() == AS_none &&
       !CXXRecordDecl::classofKind(D->getKind()) &&
       D->getDeclName().getNameKind() == DeclarationName::Identifier)
-
     AbbrevToUse = Writer.getDeclRecordAbbrev();
 
   Code = serialization::DECL_RECORD;
@@ -243,19 +276,6 @@ void ASTDeclWriter::VisitEnumConstantDecl(EnumConstantDecl *D) {
     Writer.AddStmt(D->getInitExpr());
   Writer.AddAPSInt(D->getInitVal(), Record);
 
-  if (!D->getInitExpr() &&
-      !D->isInvalidDecl() &&
-      !D->hasAttrs() &&
-      !D->isImplicit() &&
-      !D->isUsed(false) &&
-      !D->isReferenced() &&
-      D->getAccess() == AS_none &&
-      D->getPCHLevel() == 0 &&
-      D->getDeclName().getNameKind() == DeclarationName::Identifier &&
-      D->getInitVal().getBitWidth() == 32 
-      )
-    AbbrevToUse = Writer.getEnumConstantDeclAbbrev();
-
   Code = serialization::DECL_ENUM_CONSTANT;
 }
 
@@ -265,7 +285,6 @@ void ASTDeclWriter::VisitDeclaratorDecl(DeclaratorDecl *D) {
   Record.push_back(D->hasExtInfo());
   if (D->hasExtInfo())
     Writer.AddQualifierInfo(*D->getExtInfo(), Record);
-  Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
 }
 
 void ASTDeclWriter::VisitFunctionDecl(FunctionDecl *D) {
@@ -445,6 +464,18 @@ void ASTDeclWriter::VisitObjCIvarDecl(ObjCIvarDecl *D) {
   // FIXME: stable encoding for @public/@private/@protected/@package
   Record.push_back(D->getAccessControl());
   Record.push_back(D->getSynthesize());
+
+  if (!D->hasAttrs() &&
+      !D->isImplicit() &&
+      !D->isUsed(false) &&
+      !D->isInvalidDecl() &&
+      !D->isReferenced() &&
+      D->getPCHLevel() == 0 &&
+      !D->getBitWidth() &&
+      !D->hasExtInfo() &&
+      D->getDeclName())
+    AbbrevToUse = Writer.getDeclObjCIvarAbbrev();
+
   Code = serialization::DECL_OBJC_IVAR;
 }
 
@@ -572,6 +603,20 @@ void ASTDeclWriter::VisitFieldDecl(FieldDecl *D) {
     Writer.AddStmt(D->getBitWidth());
   if (!D->getDeclName())
     Writer.AddDeclRef(Context.getInstantiatedFromUnnamedFieldDecl(D), Record);
+
+  if (!D->hasAttrs() &&
+      !D->isImplicit() &&
+      !D->isUsed(false) &&
+      !D->isInvalidDecl() &&
+      !D->isReferenced() &&
+      D->getPCHLevel() == 0 &&
+      !D->getBitWidth() &&
+      !D->hasExtInfo() &&
+      !ObjCIvarDecl::classofKind(D->getKind()) &&
+      !ObjCAtDefsFieldDecl::classofKind(D->getKind()) &&
+      D->getDeclName())
+    AbbrevToUse = Writer.getDeclFieldAbbrev();
+
   Code = serialization::DECL_FIELD;
 }
 
@@ -609,6 +654,22 @@ void ASTDeclWriter::VisitVarDecl(VarDecl *D) {
     Writer.AddSourceLocation(SpecInfo->getPointOfInstantiation(), Record);
   }
 
+  if (!D->hasAttrs() &&
+      !D->isImplicit() &&
+      !D->isUsed(false) &&
+      !D->isInvalidDecl() &&
+      !D->isReferenced() &&
+      D->getAccess() == AS_none &&
+      D->getPCHLevel() == 0 &&
+      D->getDeclName().getNameKind() == DeclarationName::Identifier &&
+      !D->hasExtInfo() &&
+      D->RedeclLink.getNext() == D &&
+      !D->hasCXXDirectInitializer() &&
+      D->getInit() == 0 &&
+      !ParmVarDecl::classofKind(D->getKind()) &&
+      !SpecInfo)
+    AbbrevToUse = Writer.getDeclVarAbbrev();
+
   Code = serialization::DECL_VAR;
 }
 
@@ -633,8 +694,8 @@ void ASTDeclWriter::VisitParmVarDecl(ParmVarDecl *D) {
   // If the assumptions about the DECL_PARM_VAR abbrev are true, use it.  Here
   // we dynamically check for the properties that we optimize for, but don't
   // know are true of all PARM_VAR_DECLs.
-  if (!D->getTypeSourceInfo() &&
-      !D->hasAttrs() &&
+  if (!D->hasAttrs() &&
+      !D->hasExtInfo() &&
       !D->isImplicit() &&
       !D->isUsed(false) &&
       D->getAccess() == AS_none &&
@@ -647,7 +708,7 @@ void ASTDeclWriter::VisitParmVarDecl(ParmVarDecl *D) {
       !D->hasInheritedDefaultArg() &&
       D->getInit() == 0 &&
       !D->hasUninstantiatedDefaultArg())  // No default expr.
-    AbbrevToUse = Writer.getParmVarDeclAbbrev();
+    AbbrevToUse = Writer.getDeclParmVarAbbrev();
 
   // Check things we know are true of *every* PARM_VAR_DECL, which is more than
   // just us assuming it.
@@ -1181,9 +1242,9 @@ void ASTWriter::WriteDeclsBlockAbbrevs() {
 
   BitCodeAbbrev *Abv;
 
-  // Abbreviation for DECL_ENUM_CONSTANT
-  Abv = new BitCodeAbbrev();  
-  Abv->Add(BitCodeAbbrevOp(serialization::DECL_ENUM_CONSTANT));
+  // Abbreviation for DECL_FIELD
+  Abv = new BitCodeAbbrev();
+  Abv->Add(BitCodeAbbrevOp(serialization::DECL_FIELD));
   // Decl
   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
@@ -1193,19 +1254,103 @@ void ASTWriter::WriteDeclsBlockAbbrevs() {
   Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
   Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
   Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
-  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2));  // AccessSpecifier
   Abv->Add(BitCodeAbbrevOp(0));                       // PCH level
   // NamedDecl
   Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
   // ValueDecl
   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
-  // EnumConstantDecl
-  Abv->Add(BitCodeAbbrevOp(0));                       // getInitExpr
-  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); //isUnsigned
-  Abv->Add(BitCodeAbbrevOp(32));                      // Bit Width
-  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Value
-  EnumConstantDeclAbbrev = Stream.EmitAbbrev(Abv);
+  // DeclaratorDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
+  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
+  // FieldDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
+  Abv->Add(BitCodeAbbrevOp(0));                       //getBitWidth
+  // Type Source Info
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
+  DeclFieldAbbrev = Stream.EmitAbbrev(Abv);
+
+  // Abbreviation for DECL_OBJC_IVAR
+  Abv = new BitCodeAbbrev();
+  Abv->Add(BitCodeAbbrevOp(serialization::DECL_OBJC_IVAR));
+  // Decl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
+  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
+  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
+  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
+  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
+  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2));  // AccessSpecifier
+  Abv->Add(BitCodeAbbrevOp(0));                       // PCH level
+  // NamedDecl
+  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
+  // ValueDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
+  // DeclaratorDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
+  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
+  // FieldDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
+  Abv->Add(BitCodeAbbrevOp(0));                       //getBitWidth
+  // ObjC Ivar
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getAccessControl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getSynthesize
+  // Type Source Info
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
+  DeclObjCIvarAbbrev = Stream.EmitAbbrev(Abv);
+
+  // Abbreviation for DECL_ENUM
+  Abv = new BitCodeAbbrev();
+  Abv->Add(BitCodeAbbrevOp(serialization::DECL_ENUM));
+  // Decl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
+  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
+  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
+  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
+  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
+  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
+  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
+  Abv->Add(BitCodeAbbrevOp(0));                       // PCH level
+  // NamedDecl
+  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
+  // TypeDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
+  // Redeclarable
+  Abv->Add(BitCodeAbbrevOp(0));                         // No redeclaration
+  // TagDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IdentifierNamespace
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getTagKind
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isDefinition
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // EmbeddedInDeclarator
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // SourceLocation
+  Abv->Add(BitCodeAbbrevOp(0));                         // hasExtInfo
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // TypedefNameAnonDecl
+  // EnumDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // AddTypeRef
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // IntegerType
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getPromotionType
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getNumPositiveBits
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // getNumNegativeBits
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isScoped
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isScopedUsingClassTag
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isFixed
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // InstantiatedMembEnum
+  // DC
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // LexicalOffset
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // VisibleOffset
+  DeclEnumAbbrev = Stream.EmitAbbrev(Abv);
 
   // Abbreviation for DECL_RECORD
   Abv = new BitCodeAbbrev();
@@ -1268,7 +1413,6 @@ void ASTWriter::WriteDeclsBlockAbbrevs() {
   // DeclaratorDecl
   Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
   Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
-  Abv->Add(BitCodeAbbrevOp(serialization::PREDEF_TYPE_NULL_ID)); // InfoType
   // VarDecl
   Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
   Abv->Add(BitCodeAbbrevOp(0));                       // StorageClass
@@ -1288,10 +1432,77 @@ void ASTWriter::WriteDeclsBlockAbbrevs() {
   Abv->Add(BitCodeAbbrevOp(0));                       // KNRPromoted
   Abv->Add(BitCodeAbbrevOp(0));                       // HasInheritedDefaultArg
   Abv->Add(BitCodeAbbrevOp(0));                   // HasUninstantiatedDefaultArg
-  ParmVarDeclAbbrev = Stream.EmitAbbrev(Abv);
+  // Type Source Info
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
+  DeclParmVarAbbrev = Stream.EmitAbbrev(Abv);
 
   // Abbreviation for EXPR_DECL_REF
   Abv = new BitCodeAbbrev();
+  Abv->Add(BitCodeAbbrevOp(serialization::DECL_TYPEDEF));
+  // Decl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
+  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
+  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
+  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
+  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
+  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
+  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
+  Abv->Add(BitCodeAbbrevOp(0));                       // PCH level
+  // NamedDecl
+  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
+  // TypeDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
+  // TypedefDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
+  DeclTypedefAbbrev = Stream.EmitAbbrev(Abv);
+
+  Abv = new BitCodeAbbrev();
+  Abv->Add(BitCodeAbbrevOp(serialization::DECL_VAR));
+  // Decl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
+  Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
+  Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
+  Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
+  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
+  Abv->Add(BitCodeAbbrevOp(0));                       // isReferenced
+  Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
+  Abv->Add(BitCodeAbbrevOp(0));                       // PCH level
+
+  // NamedDecl
+  Abv->Add(BitCodeAbbrevOp(0));                       // NameKind = Identifier
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
+  // ValueDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
+  // DeclaratorDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
+  Abv->Add(BitCodeAbbrevOp(0));                       // hasExtInfo
+  // VarDecl
+  Abv->Add(BitCodeAbbrevOp(0));                       // No redeclaration
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // StorageClass
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // StorageClassAsWritten
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isThreadSpecified
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // CXXDirectInitializer
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isExceptionVariable
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isNRVOVariable
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCXXForRangeDecl
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // HasInit
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // HasMemberSpecInfo
+  // Type Source Info
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
+  Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
+  DeclVarAbbrev = Stream.EmitAbbrev(Abv);
+
+  Abv = new BitCodeAbbrev();
   Abv->Add(BitCodeAbbrevOp(serialization::EXPR_DECL_REF));
   //Stmt
   //Expr