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Diffstat (limited to 'clang/lib/Serialization/ASTWriter.cpp')
| -rw-r--r-- | clang/lib/Serialization/ASTWriter.cpp | 4552 |
1 files changed, 4552 insertions, 0 deletions
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp new file mode 100644 index 0000000..36933a9 --- /dev/null +++ b/clang/lib/Serialization/ASTWriter.cpp @@ -0,0 +1,4552 @@ +//===--- ASTWriter.cpp - AST File Writer ----------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file defines the ASTWriter class, which writes AST files. +// +//===----------------------------------------------------------------------===// + +#include "clang/Serialization/ASTWriter.h" +#include "ASTCommon.h" +#include "clang/Sema/Sema.h" +#include "clang/Sema/IdentifierResolver.h" +#include "clang/AST/ASTContext.h" +#include "clang/AST/Decl.h" +#include "clang/AST/DeclContextInternals.h" +#include "clang/AST/DeclTemplate.h" +#include "clang/AST/DeclFriend.h" +#include "clang/AST/Expr.h" +#include "clang/AST/ExprCXX.h" +#include "clang/AST/Type.h" +#include "clang/AST/TypeLocVisitor.h" +#include "clang/Serialization/ASTReader.h" +#include "clang/Lex/MacroInfo.h" +#include "clang/Lex/PreprocessingRecord.h" +#include "clang/Lex/Preprocessor.h" +#include "clang/Lex/HeaderSearch.h" +#include "clang/Basic/FileManager.h" +#include "clang/Basic/FileSystemStatCache.h" +#include "clang/Basic/OnDiskHashTable.h" +#include "clang/Basic/SourceManager.h" +#include "clang/Basic/SourceManagerInternals.h" +#include "clang/Basic/TargetInfo.h" +#include "clang/Basic/Version.h" +#include "clang/Basic/VersionTuple.h" +#include "llvm/ADT/APFloat.h" +#include "llvm/ADT/APInt.h" +#include "llvm/ADT/StringExtras.h" +#include "llvm/Bitcode/BitstreamWriter.h" +#include "llvm/Support/FileSystem.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/Path.h" +#include <algorithm> +#include <cstdio> +#include <string.h> +#include <utility> +using namespace clang; +using namespace clang::serialization; + +template <typename T, typename Allocator> +static StringRef data(const std::vector<T, Allocator> &v) { + if (v.empty()) return StringRef(); + return StringRef(reinterpret_cast<const char*>(&v[0]), + sizeof(T) * v.size()); +} + +template <typename T> +static StringRef data(const SmallVectorImpl<T> &v) { + return StringRef(reinterpret_cast<const char*>(v.data()), + sizeof(T) * v.size()); +} + +//===----------------------------------------------------------------------===// +// Type serialization +//===----------------------------------------------------------------------===// + +namespace { + class ASTTypeWriter { + ASTWriter &Writer; + ASTWriter::RecordDataImpl &Record; + + public: + /// \brief Type code that corresponds to the record generated. + TypeCode Code; + + ASTTypeWriter(ASTWriter &Writer, ASTWriter::RecordDataImpl &Record) + : Writer(Writer), Record(Record), Code(TYPE_EXT_QUAL) { } + + void VisitArrayType(const ArrayType *T); + void VisitFunctionType(const FunctionType *T); + void VisitTagType(const TagType *T); + +#define TYPE(Class, Base) void Visit##Class##Type(const Class##Type *T); +#define ABSTRACT_TYPE(Class, Base) +#include "clang/AST/TypeNodes.def" + }; +} + +void ASTTypeWriter::VisitBuiltinType(const BuiltinType *T) { + llvm_unreachable("Built-in types are never serialized"); +} + +void ASTTypeWriter::VisitComplexType(const ComplexType *T) { + Writer.AddTypeRef(T->getElementType(), Record); + Code = TYPE_COMPLEX; +} + +void ASTTypeWriter::VisitPointerType(const PointerType *T) { + Writer.AddTypeRef(T->getPointeeType(), Record); + Code = TYPE_POINTER; +} + +void ASTTypeWriter::VisitBlockPointerType(const BlockPointerType *T) { + Writer.AddTypeRef(T->getPointeeType(), Record); + Code = TYPE_BLOCK_POINTER; +} + +void ASTTypeWriter::VisitLValueReferenceType(const LValueReferenceType *T) { + Writer.AddTypeRef(T->getPointeeTypeAsWritten(), Record); + Record.push_back(T->isSpelledAsLValue()); + Code = TYPE_LVALUE_REFERENCE; +} + +void ASTTypeWriter::VisitRValueReferenceType(const RValueReferenceType *T) { + Writer.AddTypeRef(T->getPointeeTypeAsWritten(), Record); + Code = TYPE_RVALUE_REFERENCE; +} + +void ASTTypeWriter::VisitMemberPointerType(const MemberPointerType *T) { + Writer.AddTypeRef(T->getPointeeType(), Record); + Writer.AddTypeRef(QualType(T->getClass(), 0), Record); + Code = TYPE_MEMBER_POINTER; +} + +void ASTTypeWriter::VisitArrayType(const ArrayType *T) { + Writer.AddTypeRef(T->getElementType(), Record); + Record.push_back(T->getSizeModifier()); // FIXME: stable values + Record.push_back(T->getIndexTypeCVRQualifiers()); // FIXME: stable values +} + +void ASTTypeWriter::VisitConstantArrayType(const ConstantArrayType *T) { + VisitArrayType(T); + Writer.AddAPInt(T->getSize(), Record); + Code = TYPE_CONSTANT_ARRAY; +} + +void ASTTypeWriter::VisitIncompleteArrayType(const IncompleteArrayType *T) { + VisitArrayType(T); + Code = TYPE_INCOMPLETE_ARRAY; +} + +void ASTTypeWriter::VisitVariableArrayType(const VariableArrayType *T) { + VisitArrayType(T); + Writer.AddSourceLocation(T->getLBracketLoc(), Record); + Writer.AddSourceLocation(T->getRBracketLoc(), Record); + Writer.AddStmt(T->getSizeExpr()); + Code = TYPE_VARIABLE_ARRAY; +} + +void ASTTypeWriter::VisitVectorType(const VectorType *T) { + Writer.AddTypeRef(T->getElementType(), Record); + Record.push_back(T->getNumElements()); + Record.push_back(T->getVectorKind()); + Code = TYPE_VECTOR; +} + +void ASTTypeWriter::VisitExtVectorType(const ExtVectorType *T) { + VisitVectorType(T); + Code = TYPE_EXT_VECTOR; +} + +void ASTTypeWriter::VisitFunctionType(const FunctionType *T) { + Writer.AddTypeRef(T->getResultType(), Record); + FunctionType::ExtInfo C = T->getExtInfo(); + Record.push_back(C.getNoReturn()); + Record.push_back(C.getHasRegParm()); + Record.push_back(C.getRegParm()); + // FIXME: need to stabilize encoding of calling convention... + Record.push_back(C.getCC()); + Record.push_back(C.getProducesResult()); +} + +void ASTTypeWriter::VisitFunctionNoProtoType(const FunctionNoProtoType *T) { + VisitFunctionType(T); + Code = TYPE_FUNCTION_NO_PROTO; +} + +void ASTTypeWriter::VisitFunctionProtoType(const FunctionProtoType *T) { + VisitFunctionType(T); + Record.push_back(T->getNumArgs()); + for (unsigned I = 0, N = T->getNumArgs(); I != N; ++I) + Writer.AddTypeRef(T->getArgType(I), Record); + Record.push_back(T->isVariadic()); + Record.push_back(T->hasTrailingReturn()); + Record.push_back(T->getTypeQuals()); + Record.push_back(static_cast<unsigned>(T->getRefQualifier())); + Record.push_back(T->getExceptionSpecType()); + if (T->getExceptionSpecType() == EST_Dynamic) { + Record.push_back(T->getNumExceptions()); + for (unsigned I = 0, N = T->getNumExceptions(); I != N; ++I) + Writer.AddTypeRef(T->getExceptionType(I), Record); + } else if (T->getExceptionSpecType() == EST_ComputedNoexcept) { + Writer.AddStmt(T->getNoexceptExpr()); + } else if (T->getExceptionSpecType() == EST_Uninstantiated) { + Writer.AddDeclRef(T->getExceptionSpecDecl(), Record); + Writer.AddDeclRef(T->getExceptionSpecTemplate(), Record); + } + Code = TYPE_FUNCTION_PROTO; +} + +void ASTTypeWriter::VisitUnresolvedUsingType(const UnresolvedUsingType *T) { + Writer.AddDeclRef(T->getDecl(), Record); + Code = TYPE_UNRESOLVED_USING; +} + +void ASTTypeWriter::VisitTypedefType(const TypedefType *T) { + Writer.AddDeclRef(T->getDecl(), Record); + assert(!T->isCanonicalUnqualified() && "Invalid typedef ?"); + Writer.AddTypeRef(T->getCanonicalTypeInternal(), Record); + Code = TYPE_TYPEDEF; +} + +void ASTTypeWriter::VisitTypeOfExprType(const TypeOfExprType *T) { + Writer.AddStmt(T->getUnderlyingExpr()); + Code = TYPE_TYPEOF_EXPR; +} + +void ASTTypeWriter::VisitTypeOfType(const TypeOfType *T) { + Writer.AddTypeRef(T->getUnderlyingType(), Record); + Code = TYPE_TYPEOF; +} + +void ASTTypeWriter::VisitDecltypeType(const DecltypeType *T) { + Writer.AddTypeRef(T->getUnderlyingType(), Record); + Writer.AddStmt(T->getUnderlyingExpr()); + Code = TYPE_DECLTYPE; +} + +void ASTTypeWriter::VisitUnaryTransformType(const UnaryTransformType *T) { + Writer.AddTypeRef(T->getBaseType(), Record); + Writer.AddTypeRef(T->getUnderlyingType(), Record); + Record.push_back(T->getUTTKind()); + Code = TYPE_UNARY_TRANSFORM; +} + +void ASTTypeWriter::VisitAutoType(const AutoType *T) { + Writer.AddTypeRef(T->getDeducedType(), Record); + Code = TYPE_AUTO; +} + +void ASTTypeWriter::VisitTagType(const TagType *T) { + Record.push_back(T->isDependentType()); + Writer.AddDeclRef(T->getDecl()->getCanonicalDecl(), Record); + assert(!T->isBeingDefined() && + "Cannot serialize in the middle of a type definition"); +} + +void ASTTypeWriter::VisitRecordType(const RecordType *T) { + VisitTagType(T); + Code = TYPE_RECORD; +} + +void ASTTypeWriter::VisitEnumType(const EnumType *T) { + VisitTagType(T); + Code = TYPE_ENUM; +} + +void ASTTypeWriter::VisitAttributedType(const AttributedType *T) { + Writer.AddTypeRef(T->getModifiedType(), Record); + Writer.AddTypeRef(T->getEquivalentType(), Record); + Record.push_back(T->getAttrKind()); + Code = TYPE_ATTRIBUTED; +} + +void +ASTTypeWriter::VisitSubstTemplateTypeParmType( + const SubstTemplateTypeParmType *T) { + Writer.AddTypeRef(QualType(T->getReplacedParameter(), 0), Record); + Writer.AddTypeRef(T->getReplacementType(), Record); + Code = TYPE_SUBST_TEMPLATE_TYPE_PARM; +} + +void +ASTTypeWriter::VisitSubstTemplateTypeParmPackType( + const SubstTemplateTypeParmPackType *T) { + Writer.AddTypeRef(QualType(T->getReplacedParameter(), 0), Record); + Writer.AddTemplateArgument(T->getArgumentPack(), Record); + Code = TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK; +} + +void +ASTTypeWriter::VisitTemplateSpecializationType( + const TemplateSpecializationType *T) { + Record.push_back(T->isDependentType()); + Writer.AddTemplateName(T->getTemplateName(), Record); + Record.push_back(T->getNumArgs()); + for (TemplateSpecializationType::iterator ArgI = T->begin(), ArgE = T->end(); + ArgI != ArgE; ++ArgI) + Writer.AddTemplateArgument(*ArgI, Record); + Writer.AddTypeRef(T->isTypeAlias() ? T->getAliasedType() : + T->isCanonicalUnqualified() ? QualType() + : T->getCanonicalTypeInternal(), + Record); + Code = TYPE_TEMPLATE_SPECIALIZATION; +} + +void +ASTTypeWriter::VisitDependentSizedArrayType(const DependentSizedArrayType *T) { + VisitArrayType(T); + Writer.AddStmt(T->getSizeExpr()); + Writer.AddSourceRange(T->getBracketsRange(), Record); + Code = TYPE_DEPENDENT_SIZED_ARRAY; +} + +void +ASTTypeWriter::VisitDependentSizedExtVectorType( + const DependentSizedExtVectorType *T) { + // FIXME: Serialize this type (C++ only) + llvm_unreachable("Cannot serialize dependent sized extended vector types"); +} + +void +ASTTypeWriter::VisitTemplateTypeParmType(const TemplateTypeParmType *T) { + Record.push_back(T->getDepth()); + Record.push_back(T->getIndex()); + Record.push_back(T->isParameterPack()); + Writer.AddDeclRef(T->getDecl(), Record); + Code = TYPE_TEMPLATE_TYPE_PARM; +} + +void +ASTTypeWriter::VisitDependentNameType(const DependentNameType *T) { + Record.push_back(T->getKeyword()); + Writer.AddNestedNameSpecifier(T->getQualifier(), Record); + Writer.AddIdentifierRef(T->getIdentifier(), Record); + Writer.AddTypeRef(T->isCanonicalUnqualified() ? QualType() + : T->getCanonicalTypeInternal(), + Record); + Code = TYPE_DEPENDENT_NAME; +} + +void +ASTTypeWriter::VisitDependentTemplateSpecializationType( + const DependentTemplateSpecializationType *T) { + Record.push_back(T->getKeyword()); + Writer.AddNestedNameSpecifier(T->getQualifier(), Record); + Writer.AddIdentifierRef(T->getIdentifier(), Record); + Record.push_back(T->getNumArgs()); + for (DependentTemplateSpecializationType::iterator + I = T->begin(), E = T->end(); I != E; ++I) + Writer.AddTemplateArgument(*I, Record); + Code = TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION; +} + +void ASTTypeWriter::VisitPackExpansionType(const PackExpansionType *T) { + Writer.AddTypeRef(T->getPattern(), Record); + if (llvm::Optional<unsigned> NumExpansions = T->getNumExpansions()) + Record.push_back(*NumExpansions + 1); + else + Record.push_back(0); + Code = TYPE_PACK_EXPANSION; +} + +void ASTTypeWriter::VisitParenType(const ParenType *T) { + Writer.AddTypeRef(T->getInnerType(), Record); + Code = TYPE_PAREN; +} + +void ASTTypeWriter::VisitElaboratedType(const ElaboratedType *T) { + Record.push_back(T->getKeyword()); + Writer.AddNestedNameSpecifier(T->getQualifier(), Record); + Writer.AddTypeRef(T->getNamedType(), Record); + Code = TYPE_ELABORATED; +} + +void ASTTypeWriter::VisitInjectedClassNameType(const InjectedClassNameType *T) { + Writer.AddDeclRef(T->getDecl()->getCanonicalDecl(), Record); + Writer.AddTypeRef(T->getInjectedSpecializationType(), Record); + Code = TYPE_INJECTED_CLASS_NAME; +} + +void ASTTypeWriter::VisitObjCInterfaceType(const ObjCInterfaceType *T) { + Writer.AddDeclRef(T->getDecl()->getCanonicalDecl(), Record); + Code = TYPE_OBJC_INTERFACE; +} + +void ASTTypeWriter::VisitObjCObjectType(const ObjCObjectType *T) { + Writer.AddTypeRef(T->getBaseType(), Record); + Record.push_back(T->getNumProtocols()); + for (ObjCObjectType::qual_iterator I = T->qual_begin(), + E = T->qual_end(); I != E; ++I) + Writer.AddDeclRef(*I, Record); + Code = TYPE_OBJC_OBJECT; +} + +void +ASTTypeWriter::VisitObjCObjectPointerType(const ObjCObjectPointerType *T) { + Writer.AddTypeRef(T->getPointeeType(), Record); + Code = TYPE_OBJC_OBJECT_POINTER; +} + +void +ASTTypeWriter::VisitAtomicType(const AtomicType *T) { + Writer.AddTypeRef(T->getValueType(), Record); + Code = TYPE_ATOMIC; +} + +namespace { + +class TypeLocWriter : public TypeLocVisitor<TypeLocWriter> { + ASTWriter &Writer; + ASTWriter::RecordDataImpl &Record; + +public: + TypeLocWriter(ASTWriter &Writer, ASTWriter::RecordDataImpl &Record) + : Writer(Writer), Record(Record) { } + +#define ABSTRACT_TYPELOC(CLASS, PARENT) +#define TYPELOC(CLASS, PARENT) \ + void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); +#include "clang/AST/TypeLocNodes.def" + + void VisitArrayTypeLoc(ArrayTypeLoc TyLoc); + void VisitFunctionTypeLoc(FunctionTypeLoc TyLoc); +}; + +} + +void TypeLocWriter::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { + // nothing to do +} +void TypeLocWriter::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { + Writer.AddSourceLocation(TL.getBuiltinLoc(), Record); + if (TL.needsExtraLocalData()) { + Record.push_back(TL.getWrittenTypeSpec()); + Record.push_back(TL.getWrittenSignSpec()); + Record.push_back(TL.getWrittenWidthSpec()); + Record.push_back(TL.hasModeAttr()); + } +} +void TypeLocWriter::VisitComplexTypeLoc(ComplexTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitPointerTypeLoc(PointerTypeLoc TL) { + Writer.AddSourceLocation(TL.getStarLoc(), Record); +} +void TypeLocWriter::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { + Writer.AddSourceLocation(TL.getCaretLoc(), Record); +} +void TypeLocWriter::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { + Writer.AddSourceLocation(TL.getAmpLoc(), Record); +} +void TypeLocWriter::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { + Writer.AddSourceLocation(TL.getAmpAmpLoc(), Record); +} +void TypeLocWriter::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { + Writer.AddSourceLocation(TL.getStarLoc(), Record); + Writer.AddTypeSourceInfo(TL.getClassTInfo(), Record); +} +void TypeLocWriter::VisitArrayTypeLoc(ArrayTypeLoc TL) { + Writer.AddSourceLocation(TL.getLBracketLoc(), Record); + Writer.AddSourceLocation(TL.getRBracketLoc(), Record); + Record.push_back(TL.getSizeExpr() ? 1 : 0); + if (TL.getSizeExpr()) + Writer.AddStmt(TL.getSizeExpr()); +} +void TypeLocWriter::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { + VisitArrayTypeLoc(TL); +} +void TypeLocWriter::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { + VisitArrayTypeLoc(TL); +} +void TypeLocWriter::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { + VisitArrayTypeLoc(TL); +} +void TypeLocWriter::VisitDependentSizedArrayTypeLoc( + DependentSizedArrayTypeLoc TL) { + VisitArrayTypeLoc(TL); +} +void TypeLocWriter::VisitDependentSizedExtVectorTypeLoc( + DependentSizedExtVectorTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitVectorTypeLoc(VectorTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitFunctionTypeLoc(FunctionTypeLoc TL) { + Writer.AddSourceLocation(TL.getLocalRangeBegin(), Record); + Writer.AddSourceLocation(TL.getLocalRangeEnd(), Record); + Record.push_back(TL.getTrailingReturn()); + for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) + Writer.AddDeclRef(TL.getArg(i), Record); +} +void TypeLocWriter::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { + VisitFunctionTypeLoc(TL); +} +void TypeLocWriter::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { + VisitFunctionTypeLoc(TL); +} +void TypeLocWriter::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitTypedefTypeLoc(TypedefTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { + Writer.AddSourceLocation(TL.getTypeofLoc(), Record); + Writer.AddSourceLocation(TL.getLParenLoc(), Record); + Writer.AddSourceLocation(TL.getRParenLoc(), Record); +} +void TypeLocWriter::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { + Writer.AddSourceLocation(TL.getTypeofLoc(), Record); + Writer.AddSourceLocation(TL.getLParenLoc(), Record); + Writer.AddSourceLocation(TL.getRParenLoc(), Record); + Writer.AddTypeSourceInfo(TL.getUnderlyingTInfo(), Record); +} +void TypeLocWriter::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { + Writer.AddSourceLocation(TL.getKWLoc(), Record); + Writer.AddSourceLocation(TL.getLParenLoc(), Record); + Writer.AddSourceLocation(TL.getRParenLoc(), Record); + Writer.AddTypeSourceInfo(TL.getUnderlyingTInfo(), Record); +} +void TypeLocWriter::VisitAutoTypeLoc(AutoTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitRecordTypeLoc(RecordTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitEnumTypeLoc(EnumTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitAttributedTypeLoc(AttributedTypeLoc TL) { + Writer.AddSourceLocation(TL.getAttrNameLoc(), Record); + if (TL.hasAttrOperand()) { + SourceRange range = TL.getAttrOperandParensRange(); + Writer.AddSourceLocation(range.getBegin(), Record); + Writer.AddSourceLocation(range.getEnd(), Record); + } + if (TL.hasAttrExprOperand()) { + Expr *operand = TL.getAttrExprOperand(); + Record.push_back(operand ? 1 : 0); + if (operand) Writer.AddStmt(operand); + } else if (TL.hasAttrEnumOperand()) { + Writer.AddSourceLocation(TL.getAttrEnumOperandLoc(), Record); + } +} +void TypeLocWriter::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitSubstTemplateTypeParmTypeLoc( + SubstTemplateTypeParmTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitSubstTemplateTypeParmPackTypeLoc( + SubstTemplateTypeParmPackTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitTemplateSpecializationTypeLoc( + TemplateSpecializationTypeLoc TL) { + Writer.AddSourceLocation(TL.getTemplateKeywordLoc(), Record); + Writer.AddSourceLocation(TL.getTemplateNameLoc(), Record); + Writer.AddSourceLocation(TL.getLAngleLoc(), Record); + Writer.AddSourceLocation(TL.getRAngleLoc(), Record); + for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) + Writer.AddTemplateArgumentLocInfo(TL.getArgLoc(i).getArgument().getKind(), + TL.getArgLoc(i).getLocInfo(), Record); +} +void TypeLocWriter::VisitParenTypeLoc(ParenTypeLoc TL) { + Writer.AddSourceLocation(TL.getLParenLoc(), Record); + Writer.AddSourceLocation(TL.getRParenLoc(), Record); +} +void TypeLocWriter::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { + Writer.AddSourceLocation(TL.getElaboratedKeywordLoc(), Record); + Writer.AddNestedNameSpecifierLoc(TL.getQualifierLoc(), Record); +} +void TypeLocWriter::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { + Writer.AddSourceLocation(TL.getElaboratedKeywordLoc(), Record); + Writer.AddNestedNameSpecifierLoc(TL.getQualifierLoc(), Record); + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitDependentTemplateSpecializationTypeLoc( + DependentTemplateSpecializationTypeLoc TL) { + Writer.AddSourceLocation(TL.getElaboratedKeywordLoc(), Record); + Writer.AddNestedNameSpecifierLoc(TL.getQualifierLoc(), Record); + Writer.AddSourceLocation(TL.getTemplateKeywordLoc(), Record); + Writer.AddSourceLocation(TL.getTemplateNameLoc(), Record); + Writer.AddSourceLocation(TL.getLAngleLoc(), Record); + Writer.AddSourceLocation(TL.getRAngleLoc(), Record); + for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) + Writer.AddTemplateArgumentLocInfo(TL.getArgLoc(I).getArgument().getKind(), + TL.getArgLoc(I).getLocInfo(), Record); +} +void TypeLocWriter::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) { + Writer.AddSourceLocation(TL.getEllipsisLoc(), Record); +} +void TypeLocWriter::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { + Writer.AddSourceLocation(TL.getNameLoc(), Record); +} +void TypeLocWriter::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { + Record.push_back(TL.hasBaseTypeAsWritten()); + Writer.AddSourceLocation(TL.getLAngleLoc(), Record); + Writer.AddSourceLocation(TL.getRAngleLoc(), Record); + for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) + Writer.AddSourceLocation(TL.getProtocolLoc(i), Record); +} +void TypeLocWriter::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { + Writer.AddSourceLocation(TL.getStarLoc(), Record); +} +void TypeLocWriter::VisitAtomicTypeLoc(AtomicTypeLoc TL) { + Writer.AddSourceLocation(TL.getKWLoc(), Record); + Writer.AddSourceLocation(TL.getLParenLoc(), Record); + Writer.AddSourceLocation(TL.getRParenLoc(), Record); +} + +//===----------------------------------------------------------------------===// +// ASTWriter Implementation +//===----------------------------------------------------------------------===// + +static void EmitBlockID(unsigned ID, const char *Name, + llvm::BitstreamWriter &Stream, + ASTWriter::RecordDataImpl &Record) { + Record.clear(); + Record.push_back(ID); + Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETBID, Record); + + // Emit the block name if present. + if (Name == 0 || Name[0] == 0) return; + Record.clear(); + while (*Name) + Record.push_back(*Name++); + Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_BLOCKNAME, Record); +} + +static void EmitRecordID(unsigned ID, const char *Name, + llvm::BitstreamWriter &Stream, + ASTWriter::RecordDataImpl &Record) { + Record.clear(); + Record.push_back(ID); + while (*Name) + Record.push_back(*Name++); + Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETRECORDNAME, Record); +} + +static void AddStmtsExprs(llvm::BitstreamWriter &Stream, + ASTWriter::RecordDataImpl &Record) { +#define RECORD(X) EmitRecordID(X, #X, Stream, Record) + RECORD(STMT_STOP); + RECORD(STMT_NULL_PTR); + RECORD(STMT_NULL); + RECORD(STMT_COMPOUND); + RECORD(STMT_CASE); + RECORD(STMT_DEFAULT); + RECORD(STMT_LABEL); + RECORD(STMT_ATTRIBUTED); + RECORD(STMT_IF); + RECORD(STMT_SWITCH); + RECORD(STMT_WHILE); + RECORD(STMT_DO); + RECORD(STMT_FOR); + RECORD(STMT_GOTO); + RECORD(STMT_INDIRECT_GOTO); + RECORD(STMT_CONTINUE); + RECORD(STMT_BREAK); + RECORD(STMT_RETURN); + RECORD(STMT_DECL); + RECORD(STMT_ASM); + RECORD(EXPR_PREDEFINED); + RECORD(EXPR_DECL_REF); + RECORD(EXPR_INTEGER_LITERAL); + RECORD(EXPR_FLOATING_LITERAL); + RECORD(EXPR_IMAGINARY_LITERAL); + RECORD(EXPR_STRING_LITERAL); + RECORD(EXPR_CHARACTER_LITERAL); + RECORD(EXPR_PAREN); + RECORD(EXPR_UNARY_OPERATOR); + RECORD(EXPR_SIZEOF_ALIGN_OF); + RECORD(EXPR_ARRAY_SUBSCRIPT); + RECORD(EXPR_CALL); + RECORD(EXPR_MEMBER); + RECORD(EXPR_BINARY_OPERATOR); + RECORD(EXPR_COMPOUND_ASSIGN_OPERATOR); + RECORD(EXPR_CONDITIONAL_OPERATOR); + RECORD(EXPR_IMPLICIT_CAST); + RECORD(EXPR_CSTYLE_CAST); + RECORD(EXPR_COMPOUND_LITERAL); + RECORD(EXPR_EXT_VECTOR_ELEMENT); + RECORD(EXPR_INIT_LIST); + RECORD(EXPR_DESIGNATED_INIT); + RECORD(EXPR_IMPLICIT_VALUE_INIT); + RECORD(EXPR_VA_ARG); + RECORD(EXPR_ADDR_LABEL); + RECORD(EXPR_STMT); + RECORD(EXPR_CHOOSE); + RECORD(EXPR_GNU_NULL); + RECORD(EXPR_SHUFFLE_VECTOR); + RECORD(EXPR_BLOCK); + RECORD(EXPR_GENERIC_SELECTION); + RECORD(EXPR_OBJC_STRING_LITERAL); + RECORD(EXPR_OBJC_NUMERIC_LITERAL); + RECORD(EXPR_OBJC_ARRAY_LITERAL); + RECORD(EXPR_OBJC_DICTIONARY_LITERAL); + RECORD(EXPR_OBJC_ENCODE); + RECORD(EXPR_OBJC_SELECTOR_EXPR); + RECORD(EXPR_OBJC_PROTOCOL_EXPR); + RECORD(EXPR_OBJC_IVAR_REF_EXPR); + RECORD(EXPR_OBJC_PROPERTY_REF_EXPR); + RECORD(EXPR_OBJC_KVC_REF_EXPR); + RECORD(EXPR_OBJC_MESSAGE_EXPR); + RECORD(STMT_OBJC_FOR_COLLECTION); + RECORD(STMT_OBJC_CATCH); + RECORD(STMT_OBJC_FINALLY); + RECORD(STMT_OBJC_AT_TRY); + RECORD(STMT_OBJC_AT_SYNCHRONIZED); + RECORD(STMT_OBJC_AT_THROW); + RECORD(EXPR_OBJC_BOOL_LITERAL); + RECORD(EXPR_CXX_OPERATOR_CALL); + RECORD(EXPR_CXX_CONSTRUCT); + RECORD(EXPR_CXX_STATIC_CAST); + RECORD(EXPR_CXX_DYNAMIC_CAST); + RECORD(EXPR_CXX_REINTERPRET_CAST); + RECORD(EXPR_CXX_CONST_CAST); + RECORD(EXPR_CXX_FUNCTIONAL_CAST); + RECORD(EXPR_USER_DEFINED_LITERAL); + RECORD(EXPR_CXX_BOOL_LITERAL); + RECORD(EXPR_CXX_NULL_PTR_LITERAL); + RECORD(EXPR_CXX_TYPEID_EXPR); + RECORD(EXPR_CXX_TYPEID_TYPE); + RECORD(EXPR_CXX_UUIDOF_EXPR); + RECORD(EXPR_CXX_UUIDOF_TYPE); + RECORD(EXPR_CXX_THIS); + RECORD(EXPR_CXX_THROW); + RECORD(EXPR_CXX_DEFAULT_ARG); + RECORD(EXPR_CXX_BIND_TEMPORARY); + RECORD(EXPR_CXX_SCALAR_VALUE_INIT); + RECORD(EXPR_CXX_NEW); + RECORD(EXPR_CXX_DELETE); + RECORD(EXPR_CXX_PSEUDO_DESTRUCTOR); + RECORD(EXPR_EXPR_WITH_CLEANUPS); + RECORD(EXPR_CXX_DEPENDENT_SCOPE_MEMBER); + RECORD(EXPR_CXX_DEPENDENT_SCOPE_DECL_REF); + RECORD(EXPR_CXX_UNRESOLVED_CONSTRUCT); + RECORD(EXPR_CXX_UNRESOLVED_MEMBER); + RECORD(EXPR_CXX_UNRESOLVED_LOOKUP); + RECORD(EXPR_CXX_UNARY_TYPE_TRAIT); + RECORD(EXPR_CXX_NOEXCEPT); + RECORD(EXPR_OPAQUE_VALUE); + RECORD(EXPR_BINARY_TYPE_TRAIT); + RECORD(EXPR_PACK_EXPANSION); + RECORD(EXPR_SIZEOF_PACK); + RECORD(EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK); + RECORD(EXPR_CUDA_KERNEL_CALL); +#undef RECORD +} + +void ASTWriter::WriteBlockInfoBlock() { + RecordData Record; + Stream.EnterSubblock(llvm::bitc::BLOCKINFO_BLOCK_ID, 3); + +#define BLOCK(X) EmitBlockID(X ## _ID, #X, Stream, Record) +#define RECORD(X) EmitRecordID(X, #X, Stream, Record) + + // AST Top-Level Block. + BLOCK(AST_BLOCK); + RECORD(ORIGINAL_FILE_NAME); + RECORD(ORIGINAL_FILE_ID); + RECORD(TYPE_OFFSET); + RECORD(DECL_OFFSET); + RECORD(LANGUAGE_OPTIONS); + RECORD(METADATA); + RECORD(IDENTIFIER_OFFSET); + RECORD(IDENTIFIER_TABLE); + RECORD(EXTERNAL_DEFINITIONS); + RECORD(SPECIAL_TYPES); + RECORD(STATISTICS); + RECORD(TENTATIVE_DEFINITIONS); + RECORD(UNUSED_FILESCOPED_DECLS); + RECORD(LOCALLY_SCOPED_EXTERNAL_DECLS); + RECORD(SELECTOR_OFFSETS); + RECORD(METHOD_POOL); + RECORD(PP_COUNTER_VALUE); + RECORD(SOURCE_LOCATION_OFFSETS); + RECORD(SOURCE_LOCATION_PRELOADS); + RECORD(STAT_CACHE); + RECORD(EXT_VECTOR_DECLS); + RECORD(VERSION_CONTROL_BRANCH_REVISION); + RECORD(PPD_ENTITIES_OFFSETS); + RECORD(IMPORTS); + RECORD(REFERENCED_SELECTOR_POOL); + RECORD(TU_UPDATE_LEXICAL); + RECORD(LOCAL_REDECLARATIONS_MAP); + RECORD(SEMA_DECL_REFS); + RECORD(WEAK_UNDECLARED_IDENTIFIERS); + RECORD(PENDING_IMPLICIT_INSTANTIATIONS); + RECORD(DECL_REPLACEMENTS); + RECORD(UPDATE_VISIBLE); + RECORD(DECL_UPDATE_OFFSETS); + RECORD(DECL_UPDATES); + RECORD(CXX_BASE_SPECIFIER_OFFSETS); + RECORD(DIAG_PRAGMA_MAPPINGS); + RECORD(CUDA_SPECIAL_DECL_REFS); + RECORD(HEADER_SEARCH_TABLE); + RECORD(ORIGINAL_PCH_DIR); + RECORD(FP_PRAGMA_OPTIONS); + RECORD(OPENCL_EXTENSIONS); + RECORD(DELEGATING_CTORS); + RECORD(FILE_SOURCE_LOCATION_OFFSETS); + RECORD(KNOWN_NAMESPACES); + RECORD(MODULE_OFFSET_MAP); + RECORD(SOURCE_MANAGER_LINE_TABLE); + RECORD(OBJC_CATEGORIES_MAP); + RECORD(FILE_SORTED_DECLS); + RECORD(IMPORTED_MODULES); + RECORD(MERGED_DECLARATIONS); + RECORD(LOCAL_REDECLARATIONS); + RECORD(OBJC_CATEGORIES); + + // SourceManager Block. + BLOCK(SOURCE_MANAGER_BLOCK); + RECORD(SM_SLOC_FILE_ENTRY); + RECORD(SM_SLOC_BUFFER_ENTRY); + RECORD(SM_SLOC_BUFFER_BLOB); + RECORD(SM_SLOC_EXPANSION_ENTRY); + + // Preprocessor Block. + BLOCK(PREPROCESSOR_BLOCK); + RECORD(PP_MACRO_OBJECT_LIKE); + RECORD(PP_MACRO_FUNCTION_LIKE); + RECORD(PP_TOKEN); + + // Decls and Types block. + BLOCK(DECLTYPES_BLOCK); + RECORD(TYPE_EXT_QUAL); + RECORD(TYPE_COMPLEX); + RECORD(TYPE_POINTER); + RECORD(TYPE_BLOCK_POINTER); + RECORD(TYPE_LVALUE_REFERENCE); + RECORD(TYPE_RVALUE_REFERENCE); + RECORD(TYPE_MEMBER_POINTER); + RECORD(TYPE_CONSTANT_ARRAY); + RECORD(TYPE_INCOMPLETE_ARRAY); + RECORD(TYPE_VARIABLE_ARRAY); + RECORD(TYPE_VECTOR); + RECORD(TYPE_EXT_VECTOR); + RECORD(TYPE_FUNCTION_PROTO); + RECORD(TYPE_FUNCTION_NO_PROTO); + RECORD(TYPE_TYPEDEF); + RECORD(TYPE_TYPEOF_EXPR); + RECORD(TYPE_TYPEOF); + RECORD(TYPE_RECORD); + RECORD(TYPE_ENUM); + RECORD(TYPE_OBJC_INTERFACE); + RECORD(TYPE_OBJC_OBJECT); + RECORD(TYPE_OBJC_OBJECT_POINTER); + RECORD(TYPE_DECLTYPE); + RECORD(TYPE_ELABORATED); + RECORD(TYPE_SUBST_TEMPLATE_TYPE_PARM); + RECORD(TYPE_UNRESOLVED_USING); + RECORD(TYPE_INJECTED_CLASS_NAME); + RECORD(TYPE_OBJC_OBJECT); + RECORD(TYPE_TEMPLATE_TYPE_PARM); + RECORD(TYPE_TEMPLATE_SPECIALIZATION); + RECORD(TYPE_DEPENDENT_NAME); + RECORD(TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION); + RECORD(TYPE_DEPENDENT_SIZED_ARRAY); + RECORD(TYPE_PAREN); + RECORD(TYPE_PACK_EXPANSION); + RECORD(TYPE_ATTRIBUTED); + RECORD(TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK); + RECORD(TYPE_ATOMIC); + RECORD(DECL_TYPEDEF); + RECORD(DECL_ENUM); + RECORD(DECL_RECORD); + RECORD(DECL_ENUM_CONSTANT); + RECORD(DECL_FUNCTION); + RECORD(DECL_OBJC_METHOD); + RECORD(DECL_OBJC_INTERFACE); + RECORD(DECL_OBJC_PROTOCOL); + RECORD(DECL_OBJC_IVAR); + RECORD(DECL_OBJC_AT_DEFS_FIELD); + RECORD(DECL_OBJC_CATEGORY); + RECORD(DECL_OBJC_CATEGORY_IMPL); + RECORD(DECL_OBJC_IMPLEMENTATION); + RECORD(DECL_OBJC_COMPATIBLE_ALIAS); + RECORD(DECL_OBJC_PROPERTY); + RECORD(DECL_OBJC_PROPERTY_IMPL); + RECORD(DECL_FIELD); + RECORD(DECL_VAR); + RECORD(DECL_IMPLICIT_PARAM); + RECORD(DECL_PARM_VAR); + RECORD(DECL_FILE_SCOPE_ASM); + RECORD(DECL_BLOCK); + RECORD(DECL_CONTEXT_LEXICAL); + RECORD(DECL_CONTEXT_VISIBLE); + RECORD(DECL_NAMESPACE); + RECORD(DECL_NAMESPACE_ALIAS); + RECORD(DECL_USING); + RECORD(DECL_USING_SHADOW); + RECORD(DECL_USING_DIRECTIVE); + RECORD(DECL_UNRESOLVED_USING_VALUE); + RECORD(DECL_UNRESOLVED_USING_TYPENAME); + RECORD(DECL_LINKAGE_SPEC); + RECORD(DECL_CXX_RECORD); + RECORD(DECL_CXX_METHOD); + RECORD(DECL_CXX_CONSTRUCTOR); + RECORD(DECL_CXX_DESTRUCTOR); + RECORD(DECL_CXX_CONVERSION); + RECORD(DECL_ACCESS_SPEC); + RECORD(DECL_FRIEND); + RECORD(DECL_FRIEND_TEMPLATE); + RECORD(DECL_CLASS_TEMPLATE); + RECORD(DECL_CLASS_TEMPLATE_SPECIALIZATION); + RECORD(DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION); + RECORD(DECL_FUNCTION_TEMPLATE); + RECORD(DECL_TEMPLATE_TYPE_PARM); + RECORD(DECL_NON_TYPE_TEMPLATE_PARM); + RECORD(DECL_TEMPLATE_TEMPLATE_PARM); + RECORD(DECL_STATIC_ASSERT); + RECORD(DECL_CXX_BASE_SPECIFIERS); + RECORD(DECL_INDIRECTFIELD); + RECORD(DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK); + + // Statements and Exprs can occur in the Decls and Types block. + AddStmtsExprs(Stream, Record); + + BLOCK(PREPROCESSOR_DETAIL_BLOCK); + RECORD(PPD_MACRO_EXPANSION); + RECORD(PPD_MACRO_DEFINITION); + RECORD(PPD_INCLUSION_DIRECTIVE); + +#undef RECORD +#undef BLOCK + Stream.ExitBlock(); +} + +/// \brief Adjusts the given filename to only write out the portion of the +/// filename that is not part of the system root directory. +/// +/// \param Filename the file name to adjust. +/// +/// \param isysroot When non-NULL, the PCH file is a relocatable PCH file and +/// the returned filename will be adjusted by this system root. +/// +/// \returns either the original filename (if it needs no adjustment) or the +/// adjusted filename (which points into the @p Filename parameter). +static const char * +adjustFilenameForRelocatablePCH(const char *Filename, StringRef isysroot) { + assert(Filename && "No file name to adjust?"); + + if (isysroot.empty()) + return Filename; + + // Verify that the filename and the system root have the same prefix. + unsigned Pos = 0; + for (; Filename[Pos] && Pos < isysroot.size(); ++Pos) + if (Filename[Pos] != isysroot[Pos]) + return Filename; // Prefixes don't match. + + // We hit the end of the filename before we hit the end of the system root. + if (!Filename[Pos]) + return Filename; + + // If the file name has a '/' at the current position, skip over the '/'. + // We distinguish sysroot-based includes from absolute includes by the + // absence of '/' at the beginning of sysroot-based includes. + if (Filename[Pos] == '/') + ++Pos; + + return Filename + Pos; +} + +/// \brief Write the AST metadata (e.g., i686-apple-darwin9). +void ASTWriter::WriteMetadata(ASTContext &Context, StringRef isysroot, + const std::string &OutputFile) { + using namespace llvm; + + // Metadata + const TargetInfo &Target = Context.getTargetInfo(); + BitCodeAbbrev *MetaAbbrev = new BitCodeAbbrev(); + MetaAbbrev->Add(BitCodeAbbrevOp(METADATA)); + MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // AST major + MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // AST minor + MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang major + MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang minor + MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Relocatable + MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Has errors + MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Target triple + unsigned MetaAbbrevCode = Stream.EmitAbbrev(MetaAbbrev); + + RecordData Record; + Record.push_back(METADATA); + Record.push_back(VERSION_MAJOR); + Record.push_back(VERSION_MINOR); + Record.push_back(CLANG_VERSION_MAJOR); + Record.push_back(CLANG_VERSION_MINOR); + Record.push_back(!isysroot.empty()); + Record.push_back(ASTHasCompilerErrors); + const std::string &Triple = Target.getTriple().getTriple(); + Stream.EmitRecordWithBlob(MetaAbbrevCode, Record, Triple); + + if (Chain) { + serialization::ModuleManager &Mgr = Chain->getModuleManager(); + llvm::SmallVector<char, 128> ModulePaths; + Record.clear(); + + for (ModuleManager::ModuleIterator M = Mgr.begin(), MEnd = Mgr.end(); + M != MEnd; ++M) { + // Skip modules that weren't directly imported. + if (!(*M)->isDirectlyImported()) + continue; + + Record.push_back((unsigned)(*M)->Kind); // FIXME: Stable encoding + // FIXME: Write import location, once it matters. + // FIXME: This writes the absolute path for AST files we depend on. + const std::string &FileName = (*M)->FileName; + Record.push_back(FileName.size()); + Record.append(FileName.begin(), FileName.end()); + } + Stream.EmitRecord(IMPORTS, Record); + } + + // Original file name and file ID + SourceManager &SM = Context.getSourceManager(); + if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) { + BitCodeAbbrev *FileAbbrev = new BitCodeAbbrev(); + FileAbbrev->Add(BitCodeAbbrevOp(ORIGINAL_FILE_NAME)); + FileAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name + unsigned FileAbbrevCode = Stream.EmitAbbrev(FileAbbrev); + + SmallString<128> MainFilePath(MainFile->getName()); + + llvm::sys::fs::make_absolute(MainFilePath); + + const char *MainFileNameStr = MainFilePath.c_str(); + MainFileNameStr = adjustFilenameForRelocatablePCH(MainFileNameStr, + isysroot); + RecordData Record; + Record.push_back(ORIGINAL_FILE_NAME); + Stream.EmitRecordWithBlob(FileAbbrevCode, Record, MainFileNameStr); + + Record.clear(); + Record.push_back(SM.getMainFileID().getOpaqueValue()); + Stream.EmitRecord(ORIGINAL_FILE_ID, Record); + } + + // Original PCH directory + if (!OutputFile.empty() && OutputFile != "-") { + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(ORIGINAL_PCH_DIR)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name + unsigned AbbrevCode = Stream.EmitAbbrev(Abbrev); + + SmallString<128> OutputPath(OutputFile); + + llvm::sys::fs::make_absolute(OutputPath); + StringRef origDir = llvm::sys::path::parent_path(OutputPath); + + RecordData Record; + Record.push_back(ORIGINAL_PCH_DIR); + Stream.EmitRecordWithBlob(AbbrevCode, Record, origDir); + } + + // Repository branch/version information. + BitCodeAbbrev *RepoAbbrev = new BitCodeAbbrev(); + RepoAbbrev->Add(BitCodeAbbrevOp(VERSION_CONTROL_BRANCH_REVISION)); + RepoAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // SVN branch/tag + unsigned RepoAbbrevCode = Stream.EmitAbbrev(RepoAbbrev); + Record.clear(); + Record.push_back(VERSION_CONTROL_BRANCH_REVISION); + Stream.EmitRecordWithBlob(RepoAbbrevCode, Record, + getClangFullRepositoryVersion()); +} + +/// \brief Write the LangOptions structure. +void ASTWriter::WriteLanguageOptions(const LangOptions &LangOpts) { + RecordData Record; +#define LANGOPT(Name, Bits, Default, Description) \ + Record.push_back(LangOpts.Name); +#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \ + Record.push_back(static_cast<unsigned>(LangOpts.get##Name())); +#include "clang/Basic/LangOptions.def" + + Record.push_back(LangOpts.CurrentModule.size()); + Record.append(LangOpts.CurrentModule.begin(), LangOpts.CurrentModule.end()); + Stream.EmitRecord(LANGUAGE_OPTIONS, Record); +} + +//===----------------------------------------------------------------------===// +// stat cache Serialization +//===----------------------------------------------------------------------===// + +namespace { +// Trait used for the on-disk hash table of stat cache results. +class ASTStatCacheTrait { +public: + typedef const char * key_type; + typedef key_type key_type_ref; + + typedef struct stat data_type; + typedef const data_type &data_type_ref; + + static unsigned ComputeHash(const char *path) { + return llvm::HashString(path); + } + + std::pair<unsigned,unsigned> + EmitKeyDataLength(raw_ostream& Out, const char *path, + data_type_ref Data) { + unsigned StrLen = strlen(path); + clang::io::Emit16(Out, StrLen); + unsigned DataLen = 4 + 4 + 2 + 8 + 8; + clang::io::Emit8(Out, DataLen); + return std::make_pair(StrLen + 1, DataLen); + } + + void EmitKey(raw_ostream& Out, const char *path, unsigned KeyLen) { + Out.write(path, KeyLen); + } + + void EmitData(raw_ostream &Out, key_type_ref, + data_type_ref Data, unsigned DataLen) { + using namespace clang::io; + uint64_t Start = Out.tell(); (void)Start; + + Emit32(Out, (uint32_t) Data.st_ino); + Emit32(Out, (uint32_t) Data.st_dev); + Emit16(Out, (uint16_t) Data.st_mode); + Emit64(Out, (uint64_t) Data.st_mtime); + Emit64(Out, (uint64_t) Data.st_size); + + assert(Out.tell() - Start == DataLen && "Wrong data length"); + } +}; +} // end anonymous namespace + +/// \brief Write the stat() system call cache to the AST file. +void ASTWriter::WriteStatCache(MemorizeStatCalls &StatCalls) { + // Build the on-disk hash table containing information about every + // stat() call. + OnDiskChainedHashTableGenerator<ASTStatCacheTrait> Generator; + unsigned NumStatEntries = 0; + for (MemorizeStatCalls::iterator Stat = StatCalls.begin(), + StatEnd = StatCalls.end(); + Stat != StatEnd; ++Stat, ++NumStatEntries) { + StringRef Filename = Stat->first(); + Generator.insert(Filename.data(), Stat->second); + } + + // Create the on-disk hash table in a buffer. + SmallString<4096> StatCacheData; + uint32_t BucketOffset; + { + llvm::raw_svector_ostream Out(StatCacheData); + // Make sure that no bucket is at offset 0 + clang::io::Emit32(Out, 0); + BucketOffset = Generator.Emit(Out); + } + + // Create a blob abbreviation + using namespace llvm; + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(STAT_CACHE)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned StatCacheAbbrev = Stream.EmitAbbrev(Abbrev); + + // Write the stat cache + RecordData Record; + Record.push_back(STAT_CACHE); + Record.push_back(BucketOffset); + Record.push_back(NumStatEntries); + Stream.EmitRecordWithBlob(StatCacheAbbrev, Record, StatCacheData.str()); +} + +//===----------------------------------------------------------------------===// +// Source Manager Serialization +//===----------------------------------------------------------------------===// + +/// \brief Create an abbreviation for the SLocEntry that refers to a +/// file. +static unsigned CreateSLocFileAbbrev(llvm::BitstreamWriter &Stream) { + using namespace llvm; + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SM_SLOC_FILE_ENTRY)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Include location + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // Characteristic + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Line directives + // FileEntry fields. + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 12)); // Size + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 32)); // Modification time + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // BufferOverridden + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // NumCreatedFIDs + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 24)); // FirstDeclIndex + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // NumDecls + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name + return Stream.EmitAbbrev(Abbrev); +} + +/// \brief Create an abbreviation for the SLocEntry that refers to a +/// buffer. +static unsigned CreateSLocBufferAbbrev(llvm::BitstreamWriter &Stream) { + using namespace llvm; + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SM_SLOC_BUFFER_ENTRY)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Include location + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // Characteristic + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Line directives + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Buffer name blob + return Stream.EmitAbbrev(Abbrev); +} + +/// \brief Create an abbreviation for the SLocEntry that refers to a +/// buffer's blob. +static unsigned CreateSLocBufferBlobAbbrev(llvm::BitstreamWriter &Stream) { + using namespace llvm; + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SM_SLOC_BUFFER_BLOB)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Blob + return Stream.EmitAbbrev(Abbrev); +} + +/// \brief Create an abbreviation for the SLocEntry that refers to a macro +/// expansion. +static unsigned CreateSLocExpansionAbbrev(llvm::BitstreamWriter &Stream) { + using namespace llvm; + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SM_SLOC_EXPANSION_ENTRY)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Spelling location + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Start location + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // End location + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Token length + return Stream.EmitAbbrev(Abbrev); +} + +namespace { + // Trait used for the on-disk hash table of header search information. + class HeaderFileInfoTrait { + ASTWriter &Writer; + const HeaderSearch &HS; + + // Keep track of the framework names we've used during serialization. + SmallVector<char, 128> FrameworkStringData; + llvm::StringMap<unsigned> FrameworkNameOffset; + + public: + HeaderFileInfoTrait(ASTWriter &Writer, const HeaderSearch &HS) + : Writer(Writer), HS(HS) { } + + typedef const char *key_type; + typedef key_type key_type_ref; + + typedef HeaderFileInfo data_type; + typedef const data_type &data_type_ref; + + static unsigned ComputeHash(const char *path) { + // The hash is based only on the filename portion of the key, so that the + // reader can match based on filenames when symlinking or excess path + // elements ("foo/../", "../") change the form of the name. However, + // complete path is still the key. + return llvm::HashString(llvm::sys::path::filename(path)); + } + + std::pair<unsigned,unsigned> + EmitKeyDataLength(raw_ostream& Out, const char *path, + data_type_ref Data) { + unsigned StrLen = strlen(path); + clang::io::Emit16(Out, StrLen); + unsigned DataLen = 1 + 2 + 4 + 4; + clang::io::Emit8(Out, DataLen); + return std::make_pair(StrLen + 1, DataLen); + } + + void EmitKey(raw_ostream& Out, const char *path, unsigned KeyLen) { + Out.write(path, KeyLen); + } + + void EmitData(raw_ostream &Out, key_type_ref, + data_type_ref Data, unsigned DataLen) { + using namespace clang::io; + uint64_t Start = Out.tell(); (void)Start; + + unsigned char Flags = (Data.isImport << 5) + | (Data.isPragmaOnce << 4) + | (Data.DirInfo << 2) + | (Data.Resolved << 1) + | Data.IndexHeaderMapHeader; + Emit8(Out, (uint8_t)Flags); + Emit16(Out, (uint16_t) Data.NumIncludes); + + if (!Data.ControllingMacro) + Emit32(Out, (uint32_t)Data.ControllingMacroID); + else + Emit32(Out, (uint32_t)Writer.getIdentifierRef(Data.ControllingMacro)); + + unsigned Offset = 0; + if (!Data.Framework.empty()) { + // If this header refers into a framework, save the framework name. + llvm::StringMap<unsigned>::iterator Pos + = FrameworkNameOffset.find(Data.Framework); + if (Pos == FrameworkNameOffset.end()) { + Offset = FrameworkStringData.size() + 1; + FrameworkStringData.append(Data.Framework.begin(), + Data.Framework.end()); + FrameworkStringData.push_back(0); + + FrameworkNameOffset[Data.Framework] = Offset; + } else + Offset = Pos->second; + } + Emit32(Out, Offset); + + assert(Out.tell() - Start == DataLen && "Wrong data length"); + } + + const char *strings_begin() const { return FrameworkStringData.begin(); } + const char *strings_end() const { return FrameworkStringData.end(); } + }; +} // end anonymous namespace + +/// \brief Write the header search block for the list of files that +/// +/// \param HS The header search structure to save. +/// +/// \param Chain Whether we're creating a chained AST file. +void ASTWriter::WriteHeaderSearch(const HeaderSearch &HS, StringRef isysroot) { + SmallVector<const FileEntry *, 16> FilesByUID; + HS.getFileMgr().GetUniqueIDMapping(FilesByUID); + + if (FilesByUID.size() > HS.header_file_size()) + FilesByUID.resize(HS.header_file_size()); + + HeaderFileInfoTrait GeneratorTrait(*this, HS); + OnDiskChainedHashTableGenerator<HeaderFileInfoTrait> Generator; + SmallVector<const char *, 4> SavedStrings; + unsigned NumHeaderSearchEntries = 0; + for (unsigned UID = 0, LastUID = FilesByUID.size(); UID != LastUID; ++UID) { + const FileEntry *File = FilesByUID[UID]; + if (!File) + continue; + + // Use HeaderSearch's getFileInfo to make sure we get the HeaderFileInfo + // from the external source if it was not provided already. + const HeaderFileInfo &HFI = HS.getFileInfo(File); + if (HFI.External && Chain) + continue; + + // Turn the file name into an absolute path, if it isn't already. + const char *Filename = File->getName(); + Filename = adjustFilenameForRelocatablePCH(Filename, isysroot); + + // If we performed any translation on the file name at all, we need to + // save this string, since the generator will refer to it later. + if (Filename != File->getName()) { + Filename = strdup(Filename); + SavedStrings.push_back(Filename); + } + + Generator.insert(Filename, HFI, GeneratorTrait); + ++NumHeaderSearchEntries; + } + + // Create the on-disk hash table in a buffer. + SmallString<4096> TableData; + uint32_t BucketOffset; + { + llvm::raw_svector_ostream Out(TableData); + // Make sure that no bucket is at offset 0 + clang::io::Emit32(Out, 0); + BucketOffset = Generator.Emit(Out, GeneratorTrait); + } + + // Create a blob abbreviation + using namespace llvm; + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(HEADER_SEARCH_TABLE)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned TableAbbrev = Stream.EmitAbbrev(Abbrev); + + // Write the header search table + RecordData Record; + Record.push_back(HEADER_SEARCH_TABLE); + Record.push_back(BucketOffset); + Record.push_back(NumHeaderSearchEntries); + Record.push_back(TableData.size()); + TableData.append(GeneratorTrait.strings_begin(),GeneratorTrait.strings_end()); + Stream.EmitRecordWithBlob(TableAbbrev, Record, TableData.str()); + + // Free all of the strings we had to duplicate. + for (unsigned I = 0, N = SavedStrings.size(); I != N; ++I) + free((void*)SavedStrings[I]); +} + +/// \brief Writes the block containing the serialized form of the +/// source manager. +/// +/// TODO: We should probably use an on-disk hash table (stored in a +/// blob), indexed based on the file name, so that we only create +/// entries for files that we actually need. In the common case (no +/// errors), we probably won't have to create file entries for any of +/// the files in the AST. +void ASTWriter::WriteSourceManagerBlock(SourceManager &SourceMgr, + const Preprocessor &PP, + StringRef isysroot) { + RecordData Record; + + // Enter the source manager block. + Stream.EnterSubblock(SOURCE_MANAGER_BLOCK_ID, 3); + + // Abbreviations for the various kinds of source-location entries. + unsigned SLocFileAbbrv = CreateSLocFileAbbrev(Stream); + unsigned SLocBufferAbbrv = CreateSLocBufferAbbrev(Stream); + unsigned SLocBufferBlobAbbrv = CreateSLocBufferBlobAbbrev(Stream); + unsigned SLocExpansionAbbrv = CreateSLocExpansionAbbrev(Stream); + + // Write out the source location entry table. We skip the first + // entry, which is always the same dummy entry. + std::vector<uint32_t> SLocEntryOffsets; + // Write out the offsets of only source location file entries. + // We will go through them in ASTReader::validateFileEntries(). + std::vector<uint32_t> SLocFileEntryOffsets; + RecordData PreloadSLocs; + SLocEntryOffsets.reserve(SourceMgr.local_sloc_entry_size() - 1); + for (unsigned I = 1, N = SourceMgr.local_sloc_entry_size(); + I != N; ++I) { + // Get this source location entry. + const SrcMgr::SLocEntry *SLoc = &SourceMgr.getLocalSLocEntry(I); + + // Record the offset of this source-location entry. + SLocEntryOffsets.push_back(Stream.GetCurrentBitNo()); + + // Figure out which record code to use. + unsigned Code; + if (SLoc->isFile()) { + const SrcMgr::ContentCache *Cache = SLoc->getFile().getContentCache(); + if (Cache->OrigEntry) { + Code = SM_SLOC_FILE_ENTRY; + SLocFileEntryOffsets.push_back(Stream.GetCurrentBitNo()); + } else + Code = SM_SLOC_BUFFER_ENTRY; + } else + Code = SM_SLOC_EXPANSION_ENTRY; + Record.clear(); + Record.push_back(Code); + + // Starting offset of this entry within this module, so skip the dummy. + Record.push_back(SLoc->getOffset() - 2); + if (SLoc->isFile()) { + const SrcMgr::FileInfo &File = SLoc->getFile(); + Record.push_back(File.getIncludeLoc().getRawEncoding()); + Record.push_back(File.getFileCharacteristic()); // FIXME: stable encoding + Record.push_back(File.hasLineDirectives()); + + const SrcMgr::ContentCache *Content = File.getContentCache(); + if (Content->OrigEntry) { + assert(Content->OrigEntry == Content->ContentsEntry && + "Writing to AST an overridden file is not supported"); + + // The source location entry is a file. The blob associated + // with this entry is the file name. + + // Emit size/modification time for this file. + Record.push_back(Content->OrigEntry->getSize()); + Record.push_back(Content->OrigEntry->getModificationTime()); + Record.push_back(Content->BufferOverridden); + Record.push_back(File.NumCreatedFIDs); + + FileDeclIDsTy::iterator FDI = FileDeclIDs.find(SLoc); + if (FDI != FileDeclIDs.end()) { + Record.push_back(FDI->second->FirstDeclIndex); + Record.push_back(FDI->second->DeclIDs.size()); + } else { + Record.push_back(0); + Record.push_back(0); + } + + // Turn the file name into an absolute path, if it isn't already. + const char *Filename = Content->OrigEntry->getName(); + SmallString<128> FilePath(Filename); + + // Ask the file manager to fixup the relative path for us. This will + // honor the working directory. + SourceMgr.getFileManager().FixupRelativePath(FilePath); + + // FIXME: This call to make_absolute shouldn't be necessary, the + // call to FixupRelativePath should always return an absolute path. + llvm::sys::fs::make_absolute(FilePath); + Filename = FilePath.c_str(); + + Filename = adjustFilenameForRelocatablePCH(Filename, isysroot); + Stream.EmitRecordWithBlob(SLocFileAbbrv, Record, Filename); + + if (Content->BufferOverridden) { + Record.clear(); + Record.push_back(SM_SLOC_BUFFER_BLOB); + const llvm::MemoryBuffer *Buffer + = Content->getBuffer(PP.getDiagnostics(), PP.getSourceManager()); + Stream.EmitRecordWithBlob(SLocBufferBlobAbbrv, Record, + StringRef(Buffer->getBufferStart(), + Buffer->getBufferSize() + 1)); + } + } else { + // The source location entry is a buffer. The blob associated + // with this entry contains the contents of the buffer. + + // We add one to the size so that we capture the trailing NULL + // that is required by llvm::MemoryBuffer::getMemBuffer (on + // the reader side). + const llvm::MemoryBuffer *Buffer + = Content->getBuffer(PP.getDiagnostics(), PP.getSourceManager()); + const char *Name = Buffer->getBufferIdentifier(); + Stream.EmitRecordWithBlob(SLocBufferAbbrv, Record, + StringRef(Name, strlen(Name) + 1)); + Record.clear(); + Record.push_back(SM_SLOC_BUFFER_BLOB); + Stream.EmitRecordWithBlob(SLocBufferBlobAbbrv, Record, + StringRef(Buffer->getBufferStart(), + Buffer->getBufferSize() + 1)); + + if (strcmp(Name, "<built-in>") == 0) { + PreloadSLocs.push_back(SLocEntryOffsets.size()); + } + } + } else { + // The source location entry is a macro expansion. + const SrcMgr::ExpansionInfo &Expansion = SLoc->getExpansion(); + Record.push_back(Expansion.getSpellingLoc().getRawEncoding()); + Record.push_back(Expansion.getExpansionLocStart().getRawEncoding()); + Record.push_back(Expansion.isMacroArgExpansion() ? 0 + : Expansion.getExpansionLocEnd().getRawEncoding()); + + // Compute the token length for this macro expansion. + unsigned NextOffset = SourceMgr.getNextLocalOffset(); + if (I + 1 != N) + NextOffset = SourceMgr.getLocalSLocEntry(I + 1).getOffset(); + Record.push_back(NextOffset - SLoc->getOffset() - 1); + Stream.EmitRecordWithAbbrev(SLocExpansionAbbrv, Record); + } + } + + Stream.ExitBlock(); + + if (SLocEntryOffsets.empty()) + return; + + // Write the source-location offsets table into the AST block. This + // table is used for lazily loading source-location information. + using namespace llvm; + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SOURCE_LOCATION_OFFSETS)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 16)); // # of slocs + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 16)); // total size + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // offsets + unsigned SLocOffsetsAbbrev = Stream.EmitAbbrev(Abbrev); + + Record.clear(); + Record.push_back(SOURCE_LOCATION_OFFSETS); + Record.push_back(SLocEntryOffsets.size()); + Record.push_back(SourceMgr.getNextLocalOffset() - 1); // skip dummy + Stream.EmitRecordWithBlob(SLocOffsetsAbbrev, Record, data(SLocEntryOffsets)); + + Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(FILE_SOURCE_LOCATION_OFFSETS)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 16)); // # of slocs + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // offsets + unsigned SLocFileOffsetsAbbrev = Stream.EmitAbbrev(Abbrev); + + Record.clear(); + Record.push_back(FILE_SOURCE_LOCATION_OFFSETS); + Record.push_back(SLocFileEntryOffsets.size()); + Stream.EmitRecordWithBlob(SLocFileOffsetsAbbrev, Record, + data(SLocFileEntryOffsets)); + + // Write the source location entry preloads array, telling the AST + // reader which source locations entries it should load eagerly. + Stream.EmitRecord(SOURCE_LOCATION_PRELOADS, PreloadSLocs); + + // Write the line table. It depends on remapping working, so it must come + // after the source location offsets. + if (SourceMgr.hasLineTable()) { + LineTableInfo &LineTable = SourceMgr.getLineTable(); + + Record.clear(); + // Emit the file names + Record.push_back(LineTable.getNumFilenames()); + for (unsigned I = 0, N = LineTable.getNumFilenames(); I != N; ++I) { + // Emit the file name + const char *Filename = LineTable.getFilename(I); + Filename = adjustFilenameForRelocatablePCH(Filename, isysroot); + unsigned FilenameLen = Filename? strlen(Filename) : 0; + Record.push_back(FilenameLen); + if (FilenameLen) + Record.insert(Record.end(), Filename, Filename + FilenameLen); + } + + // Emit the line entries + for (LineTableInfo::iterator L = LineTable.begin(), LEnd = LineTable.end(); + L != LEnd; ++L) { + // Only emit entries for local files. + if (L->first < 0) + continue; + + // Emit the file ID + Record.push_back(L->first); + + // Emit the line entries + Record.push_back(L->second.size()); + for (std::vector<LineEntry>::iterator LE = L->second.begin(), + LEEnd = L->second.end(); + LE != LEEnd; ++LE) { + Record.push_back(LE->FileOffset); + Record.push_back(LE->LineNo); + Record.push_back(LE->FilenameID); + Record.push_back((unsigned)LE->FileKind); + Record.push_back(LE->IncludeOffset); + } + } + Stream.EmitRecord(SOURCE_MANAGER_LINE_TABLE, Record); + } +} + +//===----------------------------------------------------------------------===// +// Preprocessor Serialization +//===----------------------------------------------------------------------===// + +static int compareMacroDefinitions(const void *XPtr, const void *YPtr) { + const std::pair<const IdentifierInfo *, MacroInfo *> &X = + *(const std::pair<const IdentifierInfo *, MacroInfo *>*)XPtr; + const std::pair<const IdentifierInfo *, MacroInfo *> &Y = + *(const std::pair<const IdentifierInfo *, MacroInfo *>*)YPtr; + return X.first->getName().compare(Y.first->getName()); +} + +/// \brief Writes the block containing the serialized form of the +/// preprocessor. +/// +void ASTWriter::WritePreprocessor(const Preprocessor &PP, bool IsModule) { + PreprocessingRecord *PPRec = PP.getPreprocessingRecord(); + if (PPRec) + WritePreprocessorDetail(*PPRec); + + RecordData Record; + + // If the preprocessor __COUNTER__ value has been bumped, remember it. + if (PP.getCounterValue() != 0) { + Record.push_back(PP.getCounterValue()); + Stream.EmitRecord(PP_COUNTER_VALUE, Record); + Record.clear(); + } + + // Enter the preprocessor block. + Stream.EnterSubblock(PREPROCESSOR_BLOCK_ID, 3); + + // If the AST file contains __DATE__ or __TIME__ emit a warning about this. + // FIXME: use diagnostics subsystem for localization etc. + if (PP.SawDateOrTime()) + fprintf(stderr, "warning: precompiled header used __DATE__ or __TIME__.\n"); + + + // Loop over all the macro definitions that are live at the end of the file, + // emitting each to the PP section. + + // Construct the list of macro definitions that need to be serialized. + SmallVector<std::pair<const IdentifierInfo *, MacroInfo *>, 2> + MacrosToEmit; + llvm::SmallPtrSet<const IdentifierInfo*, 4> MacroDefinitionsSeen; + for (Preprocessor::macro_iterator I = PP.macro_begin(Chain == 0), + E = PP.macro_end(Chain == 0); + I != E; ++I) { + const IdentifierInfo *Name = I->first; + if (!IsModule || I->second->isPublic()) { + MacroDefinitionsSeen.insert(Name); + MacrosToEmit.push_back(std::make_pair(I->first, I->second)); + } + } + + // Sort the set of macro definitions that need to be serialized by the + // name of the macro, to provide a stable ordering. + llvm::array_pod_sort(MacrosToEmit.begin(), MacrosToEmit.end(), + &compareMacroDefinitions); + + // Resolve any identifiers that defined macros at the time they were + // deserialized, adding them to the list of macros to emit (if appropriate). + for (unsigned I = 0, N = DeserializedMacroNames.size(); I != N; ++I) { + IdentifierInfo *Name + = const_cast<IdentifierInfo *>(DeserializedMacroNames[I]); + if (Name->hasMacroDefinition() && MacroDefinitionsSeen.insert(Name)) + MacrosToEmit.push_back(std::make_pair(Name, PP.getMacroInfo(Name))); + } + + for (unsigned I = 0, N = MacrosToEmit.size(); I != N; ++I) { + const IdentifierInfo *Name = MacrosToEmit[I].first; + MacroInfo *MI = MacrosToEmit[I].second; + if (!MI) + continue; + + // Don't emit builtin macros like __LINE__ to the AST file unless they have + // been redefined by the header (in which case they are not isBuiltinMacro). + // Also skip macros from a AST file if we're chaining. + + // FIXME: There is a (probably minor) optimization we could do here, if + // the macro comes from the original PCH but the identifier comes from a + // chained PCH, by storing the offset into the original PCH rather than + // writing the macro definition a second time. + if (MI->isBuiltinMacro() || + (Chain && + Name->isFromAST() && !Name->hasChangedSinceDeserialization() && + MI->isFromAST() && !MI->hasChangedAfterLoad())) + continue; + + AddIdentifierRef(Name, Record); + MacroOffsets[Name] = Stream.GetCurrentBitNo(); + Record.push_back(MI->getDefinitionLoc().getRawEncoding()); + Record.push_back(MI->isUsed()); + Record.push_back(MI->isPublic()); + AddSourceLocation(MI->getVisibilityLocation(), Record); + unsigned Code; + if (MI->isObjectLike()) { + Code = PP_MACRO_OBJECT_LIKE; + } else { + Code = PP_MACRO_FUNCTION_LIKE; + + Record.push_back(MI->isC99Varargs()); + Record.push_back(MI->isGNUVarargs()); + Record.push_back(MI->getNumArgs()); + for (MacroInfo::arg_iterator I = MI->arg_begin(), E = MI->arg_end(); + I != E; ++I) + AddIdentifierRef(*I, Record); + } + + // If we have a detailed preprocessing record, record the macro definition + // ID that corresponds to this macro. + if (PPRec) + Record.push_back(MacroDefinitions[PPRec->findMacroDefinition(MI)]); + + Stream.EmitRecord(Code, Record); + Record.clear(); + + // Emit the tokens array. + for (unsigned TokNo = 0, e = MI->getNumTokens(); TokNo != e; ++TokNo) { + // Note that we know that the preprocessor does not have any annotation + // tokens in it because they are created by the parser, and thus can't be + // in a macro definition. + const Token &Tok = MI->getReplacementToken(TokNo); + + Record.push_back(Tok.getLocation().getRawEncoding()); + Record.push_back(Tok.getLength()); + + // FIXME: When reading literal tokens, reconstruct the literal pointer if + // it is needed. + AddIdentifierRef(Tok.getIdentifierInfo(), Record); + // FIXME: Should translate token kind to a stable encoding. + Record.push_back(Tok.getKind()); + // FIXME: Should translate token flags to a stable encoding. + Record.push_back(Tok.getFlags()); + + Stream.EmitRecord(PP_TOKEN, Record); + Record.clear(); + } + ++NumMacros; + } + Stream.ExitBlock(); +} + +void ASTWriter::WritePreprocessorDetail(PreprocessingRecord &PPRec) { + if (PPRec.local_begin() == PPRec.local_end()) + return; + + SmallVector<PPEntityOffset, 64> PreprocessedEntityOffsets; + + // Enter the preprocessor block. + Stream.EnterSubblock(PREPROCESSOR_DETAIL_BLOCK_ID, 3); + + // If the preprocessor has a preprocessing record, emit it. + unsigned NumPreprocessingRecords = 0; + using namespace llvm; + + // Set up the abbreviation for + unsigned InclusionAbbrev = 0; + { + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(PPD_INCLUSION_DIRECTIVE)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // filename length + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // in quotes + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // kind + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + InclusionAbbrev = Stream.EmitAbbrev(Abbrev); + } + + unsigned FirstPreprocessorEntityID + = (Chain ? PPRec.getNumLoadedPreprocessedEntities() : 0) + + NUM_PREDEF_PP_ENTITY_IDS; + unsigned NextPreprocessorEntityID = FirstPreprocessorEntityID; + RecordData Record; + for (PreprocessingRecord::iterator E = PPRec.local_begin(), + EEnd = PPRec.local_end(); + E != EEnd; + (void)++E, ++NumPreprocessingRecords, ++NextPreprocessorEntityID) { + Record.clear(); + + PreprocessedEntityOffsets.push_back(PPEntityOffset((*E)->getSourceRange(), + Stream.GetCurrentBitNo())); + + if (MacroDefinition *MD = dyn_cast<MacroDefinition>(*E)) { + // Record this macro definition's ID. + MacroDefinitions[MD] = NextPreprocessorEntityID; + + AddIdentifierRef(MD->getName(), Record); + Stream.EmitRecord(PPD_MACRO_DEFINITION, Record); + continue; + } + + if (MacroExpansion *ME = dyn_cast<MacroExpansion>(*E)) { + Record.push_back(ME->isBuiltinMacro()); + if (ME->isBuiltinMacro()) + AddIdentifierRef(ME->getName(), Record); + else + Record.push_back(MacroDefinitions[ME->getDefinition()]); + Stream.EmitRecord(PPD_MACRO_EXPANSION, Record); + continue; + } + + if (InclusionDirective *ID = dyn_cast<InclusionDirective>(*E)) { + Record.push_back(PPD_INCLUSION_DIRECTIVE); + Record.push_back(ID->getFileName().size()); + Record.push_back(ID->wasInQuotes()); + Record.push_back(static_cast<unsigned>(ID->getKind())); + SmallString<64> Buffer; + Buffer += ID->getFileName(); + // Check that the FileEntry is not null because it was not resolved and + // we create a PCH even with compiler errors. + if (ID->getFile()) + Buffer += ID->getFile()->getName(); + Stream.EmitRecordWithBlob(InclusionAbbrev, Record, Buffer); + continue; + } + + llvm_unreachable("Unhandled PreprocessedEntity in ASTWriter"); + } + Stream.ExitBlock(); + + // Write the offsets table for the preprocessing record. + if (NumPreprocessingRecords > 0) { + assert(PreprocessedEntityOffsets.size() == NumPreprocessingRecords); + + // Write the offsets table for identifier IDs. + using namespace llvm; + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(PPD_ENTITIES_OFFSETS)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // first pp entity + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned PPEOffsetAbbrev = Stream.EmitAbbrev(Abbrev); + + Record.clear(); + Record.push_back(PPD_ENTITIES_OFFSETS); + Record.push_back(FirstPreprocessorEntityID - NUM_PREDEF_PP_ENTITY_IDS); + Stream.EmitRecordWithBlob(PPEOffsetAbbrev, Record, + data(PreprocessedEntityOffsets)); + } +} + +unsigned ASTWriter::getSubmoduleID(Module *Mod) { + llvm::DenseMap<Module *, unsigned>::iterator Known = SubmoduleIDs.find(Mod); + if (Known != SubmoduleIDs.end()) + return Known->second; + + return SubmoduleIDs[Mod] = NextSubmoduleID++; +} + +/// \brief Compute the number of modules within the given tree (including the +/// given module). +static unsigned getNumberOfModules(Module *Mod) { + unsigned ChildModules = 0; + for (Module::submodule_iterator Sub = Mod->submodule_begin(), + SubEnd = Mod->submodule_end(); + Sub != SubEnd; ++Sub) + ChildModules += getNumberOfModules(*Sub); + + return ChildModules + 1; +} + +void ASTWriter::WriteSubmodules(Module *WritingModule) { + // Determine the dependencies of our module and each of it's submodules. + // FIXME: This feels like it belongs somewhere else, but there are no + // other consumers of this information. + SourceManager &SrcMgr = PP->getSourceManager(); + ModuleMap &ModMap = PP->getHeaderSearchInfo().getModuleMap(); + for (ASTContext::import_iterator I = Context->local_import_begin(), + IEnd = Context->local_import_end(); + I != IEnd; ++I) { + if (Module *ImportedFrom + = ModMap.inferModuleFromLocation(FullSourceLoc(I->getLocation(), + SrcMgr))) { + ImportedFrom->Imports.push_back(I->getImportedModule()); + } + } + + // Enter the submodule description block. + Stream.EnterSubblock(SUBMODULE_BLOCK_ID, NUM_ALLOWED_ABBREVS_SIZE); + + // Write the abbreviations needed for the submodules block. + using namespace llvm; + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_DEFINITION)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ID + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Parent + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFramework + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsExplicit + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsSystem + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // InferSubmodules... + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // InferExplicit... + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // InferExportWild... + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name + unsigned DefinitionAbbrev = Stream.EmitAbbrev(Abbrev); + + Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_UMBRELLA_HEADER)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name + unsigned UmbrellaAbbrev = Stream.EmitAbbrev(Abbrev); + + Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_HEADER)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name + unsigned HeaderAbbrev = Stream.EmitAbbrev(Abbrev); + + Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_UMBRELLA_DIR)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name + unsigned UmbrellaDirAbbrev = Stream.EmitAbbrev(Abbrev); + + Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_REQUIRES)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Feature + unsigned RequiresAbbrev = Stream.EmitAbbrev(Abbrev); + + // Write the submodule metadata block. + RecordData Record; + Record.push_back(getNumberOfModules(WritingModule)); + Record.push_back(FirstSubmoduleID - NUM_PREDEF_SUBMODULE_IDS); + Stream.EmitRecord(SUBMODULE_METADATA, Record); + + // Write all of the submodules. + std::queue<Module *> Q; + Q.push(WritingModule); + while (!Q.empty()) { + Module *Mod = Q.front(); + Q.pop(); + unsigned ID = getSubmoduleID(Mod); + + // Emit the definition of the block. + Record.clear(); + Record.push_back(SUBMODULE_DEFINITION); + Record.push_back(ID); + if (Mod->Parent) { + assert(SubmoduleIDs[Mod->Parent] && "Submodule parent not written?"); + Record.push_back(SubmoduleIDs[Mod->Parent]); + } else { + Record.push_back(0); + } + Record.push_back(Mod->IsFramework); + Record.push_back(Mod->IsExplicit); + Record.push_back(Mod->IsSystem); + Record.push_back(Mod->InferSubmodules); + Record.push_back(Mod->InferExplicitSubmodules); + Record.push_back(Mod->InferExportWildcard); + Stream.EmitRecordWithBlob(DefinitionAbbrev, Record, Mod->Name); + + // Emit the requirements. + for (unsigned I = 0, N = Mod->Requires.size(); I != N; ++I) { + Record.clear(); + Record.push_back(SUBMODULE_REQUIRES); + Stream.EmitRecordWithBlob(RequiresAbbrev, Record, + Mod->Requires[I].data(), + Mod->Requires[I].size()); + } + + // Emit the umbrella header, if there is one. + if (const FileEntry *UmbrellaHeader = Mod->getUmbrellaHeader()) { + Record.clear(); + Record.push_back(SUBMODULE_UMBRELLA_HEADER); + Stream.EmitRecordWithBlob(UmbrellaAbbrev, Record, + UmbrellaHeader->getName()); + } else if (const DirectoryEntry *UmbrellaDir = Mod->getUmbrellaDir()) { + Record.clear(); + Record.push_back(SUBMODULE_UMBRELLA_DIR); + Stream.EmitRecordWithBlob(UmbrellaDirAbbrev, Record, + UmbrellaDir->getName()); + } + + // Emit the headers. + for (unsigned I = 0, N = Mod->Headers.size(); I != N; ++I) { + Record.clear(); + Record.push_back(SUBMODULE_HEADER); + Stream.EmitRecordWithBlob(HeaderAbbrev, Record, + Mod->Headers[I]->getName()); + } + + // Emit the imports. + if (!Mod->Imports.empty()) { + Record.clear(); + for (unsigned I = 0, N = Mod->Imports.size(); I != N; ++I) { + unsigned ImportedID = getSubmoduleID(Mod->Imports[I]); + assert(ImportedID && "Unknown submodule!"); + Record.push_back(ImportedID); + } + Stream.EmitRecord(SUBMODULE_IMPORTS, Record); + } + + // Emit the exports. + if (!Mod->Exports.empty()) { + Record.clear(); + for (unsigned I = 0, N = Mod->Exports.size(); I != N; ++I) { + if (Module *Exported = Mod->Exports[I].getPointer()) { + unsigned ExportedID = SubmoduleIDs[Exported]; + assert(ExportedID > 0 && "Unknown submodule ID?"); + Record.push_back(ExportedID); + } else { + Record.push_back(0); + } + + Record.push_back(Mod->Exports[I].getInt()); + } + Stream.EmitRecord(SUBMODULE_EXPORTS, Record); + } + + // Queue up the submodules of this module. + for (Module::submodule_iterator Sub = Mod->submodule_begin(), + SubEnd = Mod->submodule_end(); + Sub != SubEnd; ++Sub) + Q.push(*Sub); + } + + Stream.ExitBlock(); + + assert((NextSubmoduleID - FirstSubmoduleID + == getNumberOfModules(WritingModule)) && "Wrong # of submodules"); +} + +serialization::SubmoduleID +ASTWriter::inferSubmoduleIDFromLocation(SourceLocation Loc) { + if (Loc.isInvalid() || !WritingModule) + return 0; // No submodule + + // Find the module that owns this location. + ModuleMap &ModMap = PP->getHeaderSearchInfo().getModuleMap(); + Module *OwningMod + = ModMap.inferModuleFromLocation(FullSourceLoc(Loc,PP->getSourceManager())); + if (!OwningMod) + return 0; + + // Check whether this submodule is part of our own module. + if (WritingModule != OwningMod && !OwningMod->isSubModuleOf(WritingModule)) + return 0; + + return getSubmoduleID(OwningMod); +} + +void ASTWriter::WritePragmaDiagnosticMappings(const DiagnosticsEngine &Diag) { + RecordData Record; + for (DiagnosticsEngine::DiagStatePointsTy::const_iterator + I = Diag.DiagStatePoints.begin(), E = Diag.DiagStatePoints.end(); + I != E; ++I) { + const DiagnosticsEngine::DiagStatePoint &point = *I; + if (point.Loc.isInvalid()) + continue; + + Record.push_back(point.Loc.getRawEncoding()); + for (DiagnosticsEngine::DiagState::const_iterator + I = point.State->begin(), E = point.State->end(); I != E; ++I) { + if (I->second.isPragma()) { + Record.push_back(I->first); + Record.push_back(I->second.getMapping()); + } + } + Record.push_back(-1); // mark the end of the diag/map pairs for this + // location. + } + + if (!Record.empty()) + Stream.EmitRecord(DIAG_PRAGMA_MAPPINGS, Record); +} + +void ASTWriter::WriteCXXBaseSpecifiersOffsets() { + if (CXXBaseSpecifiersOffsets.empty()) + return; + + RecordData Record; + + // Create a blob abbreviation for the C++ base specifiers offsets. + using namespace llvm; + + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(CXX_BASE_SPECIFIER_OFFSETS)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // size + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned BaseSpecifierOffsetAbbrev = Stream.EmitAbbrev(Abbrev); + + // Write the base specifier offsets table. + Record.clear(); + Record.push_back(CXX_BASE_SPECIFIER_OFFSETS); + Record.push_back(CXXBaseSpecifiersOffsets.size()); + Stream.EmitRecordWithBlob(BaseSpecifierOffsetAbbrev, Record, + data(CXXBaseSpecifiersOffsets)); +} + +//===----------------------------------------------------------------------===// +// Type Serialization +//===----------------------------------------------------------------------===// + +/// \brief Write the representation of a type to the AST stream. +void ASTWriter::WriteType(QualType T) { + TypeIdx &Idx = TypeIdxs[T]; + if (Idx.getIndex() == 0) // we haven't seen this type before. + Idx = TypeIdx(NextTypeID++); + + assert(Idx.getIndex() >= FirstTypeID && "Re-writing a type from a prior AST"); + + // Record the offset for this type. + unsigned Index = Idx.getIndex() - FirstTypeID; + if (TypeOffsets.size() == Index) + TypeOffsets.push_back(Stream.GetCurrentBitNo()); + else if (TypeOffsets.size() < Index) { + TypeOffsets.resize(Index + 1); + TypeOffsets[Index] = Stream.GetCurrentBitNo(); + } + + RecordData Record; + + // Emit the type's representation. + ASTTypeWriter W(*this, Record); + + if (T.hasLocalNonFastQualifiers()) { + Qualifiers Qs = T.getLocalQualifiers(); + AddTypeRef(T.getLocalUnqualifiedType(), Record); + Record.push_back(Qs.getAsOpaqueValue()); + W.Code = TYPE_EXT_QUAL; + } else { + switch (T->getTypeClass()) { + // For all of the concrete, non-dependent types, call the + // appropriate visitor function. +#define TYPE(Class, Base) \ + case Type::Class: W.Visit##Class##Type(cast<Class##Type>(T)); break; +#define ABSTRACT_TYPE(Class, Base) +#include "clang/AST/TypeNodes.def" + } + } + + // Emit the serialized record. + Stream.EmitRecord(W.Code, Record); + + // Flush any expressions that were written as part of this type. + FlushStmts(); +} + +//===----------------------------------------------------------------------===// +// Declaration Serialization +//===----------------------------------------------------------------------===// + +/// \brief Write the block containing all of the declaration IDs +/// lexically declared within the given DeclContext. +/// +/// \returns the offset of the DECL_CONTEXT_LEXICAL block within the +/// bistream, or 0 if no block was written. +uint64_t ASTWriter::WriteDeclContextLexicalBlock(ASTContext &Context, + DeclContext *DC) { + if (DC->decls_empty()) + return 0; + + uint64_t Offset = Stream.GetCurrentBitNo(); + RecordData Record; + Record.push_back(DECL_CONTEXT_LEXICAL); + SmallVector<KindDeclIDPair, 64> Decls; + for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end(); + D != DEnd; ++D) + Decls.push_back(std::make_pair((*D)->getKind(), GetDeclRef(*D))); + + ++NumLexicalDeclContexts; + Stream.EmitRecordWithBlob(DeclContextLexicalAbbrev, Record, data(Decls)); + return Offset; +} + +void ASTWriter::WriteTypeDeclOffsets() { + using namespace llvm; + RecordData Record; + + // Write the type offsets array + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(TYPE_OFFSET)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of types + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // base type index + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // types block + unsigned TypeOffsetAbbrev = Stream.EmitAbbrev(Abbrev); + Record.clear(); + Record.push_back(TYPE_OFFSET); + Record.push_back(TypeOffsets.size()); + Record.push_back(FirstTypeID - NUM_PREDEF_TYPE_IDS); + Stream.EmitRecordWithBlob(TypeOffsetAbbrev, Record, data(TypeOffsets)); + + // Write the declaration offsets array + Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(DECL_OFFSET)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of declarations + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // base decl ID + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // declarations block + unsigned DeclOffsetAbbrev = Stream.EmitAbbrev(Abbrev); + Record.clear(); + Record.push_back(DECL_OFFSET); + Record.push_back(DeclOffsets.size()); + Record.push_back(FirstDeclID - NUM_PREDEF_DECL_IDS); + Stream.EmitRecordWithBlob(DeclOffsetAbbrev, Record, data(DeclOffsets)); +} + +void ASTWriter::WriteFileDeclIDsMap() { + using namespace llvm; + RecordData Record; + + // Join the vectors of DeclIDs from all files. + SmallVector<DeclID, 256> FileSortedIDs; + for (FileDeclIDsTy::iterator + FI = FileDeclIDs.begin(), FE = FileDeclIDs.end(); FI != FE; ++FI) { + DeclIDInFileInfo &Info = *FI->second; + Info.FirstDeclIndex = FileSortedIDs.size(); + for (LocDeclIDsTy::iterator + DI = Info.DeclIDs.begin(), DE = Info.DeclIDs.end(); DI != DE; ++DI) + FileSortedIDs.push_back(DI->second); + } + + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(FILE_SORTED_DECLS)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned AbbrevCode = Stream.EmitAbbrev(Abbrev); + Record.push_back(FILE_SORTED_DECLS); + Stream.EmitRecordWithBlob(AbbrevCode, Record, data(FileSortedIDs)); +} + +//===----------------------------------------------------------------------===// +// Global Method Pool and Selector Serialization +//===----------------------------------------------------------------------===// + +namespace { +// Trait used for the on-disk hash table used in the method pool. +class ASTMethodPoolTrait { + ASTWriter &Writer; + +public: + typedef Selector key_type; + typedef key_type key_type_ref; + + struct data_type { + SelectorID ID; + ObjCMethodList Instance, Factory; + }; + typedef const data_type& data_type_ref; + + explicit ASTMethodPoolTrait(ASTWriter &Writer) : Writer(Writer) { } + + static unsigned ComputeHash(Selector Sel) { + return serialization::ComputeHash(Sel); + } + + std::pair<unsigned,unsigned> + EmitKeyDataLength(raw_ostream& Out, Selector Sel, + data_type_ref Methods) { + unsigned KeyLen = 2 + (Sel.getNumArgs()? Sel.getNumArgs() * 4 : 4); + clang::io::Emit16(Out, KeyLen); + unsigned DataLen = 4 + 2 + 2; // 2 bytes for each of the method counts + for (const ObjCMethodList *Method = &Methods.Instance; Method; + Method = Method->Next) + if (Method->Method) + DataLen += 4; + for (const ObjCMethodList *Method = &Methods.Factory; Method; + Method = Method->Next) + if (Method->Method) + DataLen += 4; + clang::io::Emit16(Out, DataLen); + return std::make_pair(KeyLen, DataLen); + } + + void EmitKey(raw_ostream& Out, Selector Sel, unsigned) { + uint64_t Start = Out.tell(); + assert((Start >> 32) == 0 && "Selector key offset too large"); + Writer.SetSelectorOffset(Sel, Start); + unsigned N = Sel.getNumArgs(); + clang::io::Emit16(Out, N); + if (N == 0) + N = 1; + for (unsigned I = 0; I != N; ++I) + clang::io::Emit32(Out, + Writer.getIdentifierRef(Sel.getIdentifierInfoForSlot(I))); + } + + void EmitData(raw_ostream& Out, key_type_ref, + data_type_ref Methods, unsigned DataLen) { + uint64_t Start = Out.tell(); (void)Start; + clang::io::Emit32(Out, Methods.ID); + unsigned NumInstanceMethods = 0; + for (const ObjCMethodList *Method = &Methods.Instance; Method; + Method = Method->Next) + if (Method->Method) + ++NumInstanceMethods; + + unsigned NumFactoryMethods = 0; + for (const ObjCMethodList *Method = &Methods.Factory; Method; + Method = Method->Next) + if (Method->Method) + ++NumFactoryMethods; + + clang::io::Emit16(Out, NumInstanceMethods); + clang::io::Emit16(Out, NumFactoryMethods); + for (const ObjCMethodList *Method = &Methods.Instance; Method; + Method = Method->Next) + if (Method->Method) + clang::io::Emit32(Out, Writer.getDeclID(Method->Method)); + for (const ObjCMethodList *Method = &Methods.Factory; Method; + Method = Method->Next) + if (Method->Method) + clang::io::Emit32(Out, Writer.getDeclID(Method->Method)); + + assert(Out.tell() - Start == DataLen && "Data length is wrong"); + } +}; +} // end anonymous namespace + +/// \brief Write ObjC data: selectors and the method pool. +/// +/// The method pool contains both instance and factory methods, stored +/// in an on-disk hash table indexed by the selector. The hash table also +/// contains an empty entry for every other selector known to Sema. +void ASTWriter::WriteSelectors(Sema &SemaRef) { + using namespace llvm; + + // Do we have to do anything at all? + if (SemaRef.MethodPool.empty() && SelectorIDs.empty()) + return; + unsigned NumTableEntries = 0; + // Create and write out the blob that contains selectors and the method pool. + { + OnDiskChainedHashTableGenerator<ASTMethodPoolTrait> Generator; + ASTMethodPoolTrait Trait(*this); + + // Create the on-disk hash table representation. We walk through every + // selector we've seen and look it up in the method pool. + SelectorOffsets.resize(NextSelectorID - FirstSelectorID); + for (llvm::DenseMap<Selector, SelectorID>::iterator + I = SelectorIDs.begin(), E = SelectorIDs.end(); + I != E; ++I) { + Selector S = I->first; + Sema::GlobalMethodPool::iterator F = SemaRef.MethodPool.find(S); + ASTMethodPoolTrait::data_type Data = { + I->second, + ObjCMethodList(), + ObjCMethodList() + }; + if (F != SemaRef.MethodPool.end()) { + Data.Instance = F->second.first; + Data.Factory = F->second.second; + } + // Only write this selector if it's not in an existing AST or something + // changed. + if (Chain && I->second < FirstSelectorID) { + // Selector already exists. Did it change? + bool changed = false; + for (ObjCMethodList *M = &Data.Instance; !changed && M && M->Method; + M = M->Next) { + if (!M->Method->isFromASTFile()) + changed = true; + } + for (ObjCMethodList *M = &Data.Factory; !changed && M && M->Method; + M = M->Next) { + if (!M->Method->isFromASTFile()) + changed = true; + } + if (!changed) + continue; + } else if (Data.Instance.Method || Data.Factory.Method) { + // A new method pool entry. + ++NumTableEntries; + } + Generator.insert(S, Data, Trait); + } + + // Create the on-disk hash table in a buffer. + SmallString<4096> MethodPool; + uint32_t BucketOffset; + { + ASTMethodPoolTrait Trait(*this); + llvm::raw_svector_ostream Out(MethodPool); + // Make sure that no bucket is at offset 0 + clang::io::Emit32(Out, 0); + BucketOffset = Generator.Emit(Out, Trait); + } + + // Create a blob abbreviation + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(METHOD_POOL)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned MethodPoolAbbrev = Stream.EmitAbbrev(Abbrev); + + // Write the method pool + RecordData Record; + Record.push_back(METHOD_POOL); + Record.push_back(BucketOffset); + Record.push_back(NumTableEntries); + Stream.EmitRecordWithBlob(MethodPoolAbbrev, Record, MethodPool.str()); + + // Create a blob abbreviation for the selector table offsets. + Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(SELECTOR_OFFSETS)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // size + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // first ID + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned SelectorOffsetAbbrev = Stream.EmitAbbrev(Abbrev); + + // Write the selector offsets table. + Record.clear(); + Record.push_back(SELECTOR_OFFSETS); + Record.push_back(SelectorOffsets.size()); + Record.push_back(FirstSelectorID - NUM_PREDEF_SELECTOR_IDS); + Stream.EmitRecordWithBlob(SelectorOffsetAbbrev, Record, + data(SelectorOffsets)); + } +} + +/// \brief Write the selectors referenced in @selector expression into AST file. +void ASTWriter::WriteReferencedSelectorsPool(Sema &SemaRef) { + using namespace llvm; + if (SemaRef.ReferencedSelectors.empty()) + return; + + RecordData Record; + + // Note: this writes out all references even for a dependent AST. But it is + // very tricky to fix, and given that @selector shouldn't really appear in + // headers, probably not worth it. It's not a correctness issue. + for (DenseMap<Selector, SourceLocation>::iterator S = + SemaRef.ReferencedSelectors.begin(), + E = SemaRef.ReferencedSelectors.end(); S != E; ++S) { + Selector Sel = (*S).first; + SourceLocation Loc = (*S).second; + AddSelectorRef(Sel, Record); + AddSourceLocation(Loc, Record); + } + Stream.EmitRecord(REFERENCED_SELECTOR_POOL, Record); +} + +//===----------------------------------------------------------------------===// +// Identifier Table Serialization +//===----------------------------------------------------------------------===// + +namespace { +class ASTIdentifierTableTrait { + ASTWriter &Writer; + Preprocessor &PP; + IdentifierResolver &IdResolver; + bool IsModule; + + /// \brief Determines whether this is an "interesting" identifier + /// that needs a full IdentifierInfo structure written into the hash + /// table. + bool isInterestingIdentifier(IdentifierInfo *II, MacroInfo *&Macro) { + if (II->isPoisoned() || + II->isExtensionToken() || + II->getObjCOrBuiltinID() || + II->hasRevertedTokenIDToIdentifier() || + II->getFETokenInfo<void>()) + return true; + + return hasMacroDefinition(II, Macro); + } + + bool hasMacroDefinition(IdentifierInfo *II, MacroInfo *&Macro) { + if (!II->hasMacroDefinition()) + return false; + + if (Macro || (Macro = PP.getMacroInfo(II))) + return !Macro->isBuiltinMacro() && (!IsModule || Macro->isPublic()); + + return false; + } + +public: + typedef IdentifierInfo* key_type; + typedef key_type key_type_ref; + + typedef IdentID data_type; + typedef data_type data_type_ref; + + ASTIdentifierTableTrait(ASTWriter &Writer, Preprocessor &PP, + IdentifierResolver &IdResolver, bool IsModule) + : Writer(Writer), PP(PP), IdResolver(IdResolver), IsModule(IsModule) { } + + static unsigned ComputeHash(const IdentifierInfo* II) { + return llvm::HashString(II->getName()); + } + + std::pair<unsigned,unsigned> + EmitKeyDataLength(raw_ostream& Out, IdentifierInfo* II, IdentID ID) { + unsigned KeyLen = II->getLength() + 1; + unsigned DataLen = 4; // 4 bytes for the persistent ID << 1 + MacroInfo *Macro = 0; + if (isInterestingIdentifier(II, Macro)) { + DataLen += 2; // 2 bytes for builtin ID, flags + if (hasMacroDefinition(II, Macro)) + DataLen += 8; + + for (IdentifierResolver::iterator D = IdResolver.begin(II), + DEnd = IdResolver.end(); + D != DEnd; ++D) + DataLen += sizeof(DeclID); + } + clang::io::Emit16(Out, DataLen); + // We emit the key length after the data length so that every + // string is preceded by a 16-bit length. This matches the PTH + // format for storing identifiers. + clang::io::Emit16(Out, KeyLen); + return std::make_pair(KeyLen, DataLen); + } + + void EmitKey(raw_ostream& Out, const IdentifierInfo* II, + unsigned KeyLen) { + // Record the location of the key data. This is used when generating + // the mapping from persistent IDs to strings. + Writer.SetIdentifierOffset(II, Out.tell()); + Out.write(II->getNameStart(), KeyLen); + } + + void EmitData(raw_ostream& Out, IdentifierInfo* II, + IdentID ID, unsigned) { + MacroInfo *Macro = 0; + if (!isInterestingIdentifier(II, Macro)) { + clang::io::Emit32(Out, ID << 1); + return; + } + + clang::io::Emit32(Out, (ID << 1) | 0x01); + uint32_t Bits = 0; + bool HasMacroDefinition = hasMacroDefinition(II, Macro); + Bits = (uint32_t)II->getObjCOrBuiltinID(); + assert((Bits & 0x7ff) == Bits && "ObjCOrBuiltinID too big for ASTReader."); + Bits = (Bits << 1) | unsigned(HasMacroDefinition); + Bits = (Bits << 1) | unsigned(II->isExtensionToken()); + Bits = (Bits << 1) | unsigned(II->isPoisoned()); + Bits = (Bits << 1) | unsigned(II->hasRevertedTokenIDToIdentifier()); + Bits = (Bits << 1) | unsigned(II->isCPlusPlusOperatorKeyword()); + clang::io::Emit16(Out, Bits); + + if (HasMacroDefinition) { + clang::io::Emit32(Out, Writer.getMacroOffset(II)); + clang::io::Emit32(Out, + Writer.inferSubmoduleIDFromLocation(Macro->getDefinitionLoc())); + } + + // Emit the declaration IDs in reverse order, because the + // IdentifierResolver provides the declarations as they would be + // visible (e.g., the function "stat" would come before the struct + // "stat"), but the ASTReader adds declarations to the end of the list + // (so we need to see the struct "status" before the function "status"). + // Only emit declarations that aren't from a chained PCH, though. + SmallVector<Decl *, 16> Decls(IdResolver.begin(II), + IdResolver.end()); + for (SmallVector<Decl *, 16>::reverse_iterator D = Decls.rbegin(), + DEnd = Decls.rend(); + D != DEnd; ++D) + clang::io::Emit32(Out, Writer.getDeclID(*D)); + } +}; +} // end anonymous namespace + +/// \brief Write the identifier table into the AST file. +/// +/// The identifier table consists of a blob containing string data +/// (the actual identifiers themselves) and a separate "offsets" index +/// that maps identifier IDs to locations within the blob. +void ASTWriter::WriteIdentifierTable(Preprocessor &PP, + IdentifierResolver &IdResolver, + bool IsModule) { + using namespace llvm; + + // Create and write out the blob that contains the identifier + // strings. + { + OnDiskChainedHashTableGenerator<ASTIdentifierTableTrait> Generator; + ASTIdentifierTableTrait Trait(*this, PP, IdResolver, IsModule); + + // Look for any identifiers that were named while processing the + // headers, but are otherwise not needed. We add these to the hash + // table to enable checking of the predefines buffer in the case + // where the user adds new macro definitions when building the AST + // file. + for (IdentifierTable::iterator ID = PP.getIdentifierTable().begin(), + IDEnd = PP.getIdentifierTable().end(); + ID != IDEnd; ++ID) + getIdentifierRef(ID->second); + + // Create the on-disk hash table representation. We only store offsets + // for identifiers that appear here for the first time. + IdentifierOffsets.resize(NextIdentID - FirstIdentID); + for (llvm::DenseMap<const IdentifierInfo *, IdentID>::iterator + ID = IdentifierIDs.begin(), IDEnd = IdentifierIDs.end(); + ID != IDEnd; ++ID) { + assert(ID->first && "NULL identifier in identifier table"); + if (!Chain || !ID->first->isFromAST() || + ID->first->hasChangedSinceDeserialization()) + Generator.insert(const_cast<IdentifierInfo *>(ID->first), ID->second, + Trait); + } + + // Create the on-disk hash table in a buffer. + SmallString<4096> IdentifierTable; + uint32_t BucketOffset; + { + ASTIdentifierTableTrait Trait(*this, PP, IdResolver, IsModule); + llvm::raw_svector_ostream Out(IdentifierTable); + // Make sure that no bucket is at offset 0 + clang::io::Emit32(Out, 0); + BucketOffset = Generator.Emit(Out, Trait); + } + + // Create a blob abbreviation + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(IDENTIFIER_TABLE)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned IDTableAbbrev = Stream.EmitAbbrev(Abbrev); + + // Write the identifier table + RecordData Record; + Record.push_back(IDENTIFIER_TABLE); + Record.push_back(BucketOffset); + Stream.EmitRecordWithBlob(IDTableAbbrev, Record, IdentifierTable.str()); + } + + // Write the offsets table for identifier IDs. + BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(IDENTIFIER_OFFSET)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of identifiers + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // first ID + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned IdentifierOffsetAbbrev = Stream.EmitAbbrev(Abbrev); + + RecordData Record; + Record.push_back(IDENTIFIER_OFFSET); + Record.push_back(IdentifierOffsets.size()); + Record.push_back(FirstIdentID - NUM_PREDEF_IDENT_IDS); + Stream.EmitRecordWithBlob(IdentifierOffsetAbbrev, Record, + data(IdentifierOffsets)); +} + +//===----------------------------------------------------------------------===// +// DeclContext's Name Lookup Table Serialization +//===----------------------------------------------------------------------===// + +namespace { +// Trait used for the on-disk hash table used in the method pool. +class ASTDeclContextNameLookupTrait { + ASTWriter &Writer; + +public: + typedef DeclarationName key_type; + typedef key_type key_type_ref; + + typedef DeclContext::lookup_result data_type; + typedef const data_type& data_type_ref; + + explicit ASTDeclContextNameLookupTrait(ASTWriter &Writer) : Writer(Writer) { } + + unsigned ComputeHash(DeclarationName Name) { + llvm::FoldingSetNodeID ID; + ID.AddInteger(Name.getNameKind()); + + switch (Name.getNameKind()) { + case DeclarationName::Identifier: + ID.AddString(Name.getAsIdentifierInfo()->getName()); + break; + case DeclarationName::ObjCZeroArgSelector: + case DeclarationName::ObjCOneArgSelector: + case DeclarationName::ObjCMultiArgSelector: + ID.AddInteger(serialization::ComputeHash(Name.getObjCSelector())); + break; + case DeclarationName::CXXConstructorName: + case DeclarationName::CXXDestructorName: + case DeclarationName::CXXConversionFunctionName: + break; + case DeclarationName::CXXOperatorName: + ID.AddInteger(Name.getCXXOverloadedOperator()); + break; + case DeclarationName::CXXLiteralOperatorName: + ID.AddString(Name.getCXXLiteralIdentifier()->getName()); + case DeclarationName::CXXUsingDirective: + break; + } + + return ID.ComputeHash(); + } + + std::pair<unsigned,unsigned> + EmitKeyDataLength(raw_ostream& Out, DeclarationName Name, + data_type_ref Lookup) { + unsigned KeyLen = 1; + switch (Name.getNameKind()) { + case DeclarationName::Identifier: + case DeclarationName::ObjCZeroArgSelector: + case DeclarationName::ObjCOneArgSelector: + case DeclarationName::ObjCMultiArgSelector: + case DeclarationName::CXXLiteralOperatorName: + KeyLen += 4; + break; + case DeclarationName::CXXOperatorName: + KeyLen += 1; + break; + case DeclarationName::CXXConstructorName: + case DeclarationName::CXXDestructorName: + case DeclarationName::CXXConversionFunctionName: + case DeclarationName::CXXUsingDirective: + break; + } + clang::io::Emit16(Out, KeyLen); + + // 2 bytes for num of decls and 4 for each DeclID. + unsigned DataLen = 2 + 4 * (Lookup.second - Lookup.first); + clang::io::Emit16(Out, DataLen); + + return std::make_pair(KeyLen, DataLen); + } + + void EmitKey(raw_ostream& Out, DeclarationName Name, unsigned) { + using namespace clang::io; + + assert(Name.getNameKind() < 0x100 && "Invalid name kind ?"); + Emit8(Out, Name.getNameKind()); + switch (Name.getNameKind()) { + case DeclarationName::Identifier: + Emit32(Out, Writer.getIdentifierRef(Name.getAsIdentifierInfo())); + break; + case DeclarationName::ObjCZeroArgSelector: + case DeclarationName::ObjCOneArgSelector: + case DeclarationName::ObjCMultiArgSelector: + Emit32(Out, Writer.getSelectorRef(Name.getObjCSelector())); + break; + case DeclarationName::CXXOperatorName: + assert(Name.getCXXOverloadedOperator() < 0x100 && "Invalid operator ?"); + Emit8(Out, Name.getCXXOverloadedOperator()); + break; + case DeclarationName::CXXLiteralOperatorName: + Emit32(Out, Writer.getIdentifierRef(Name.getCXXLiteralIdentifier())); + break; + case DeclarationName::CXXConstructorName: + case DeclarationName::CXXDestructorName: + case DeclarationName::CXXConversionFunctionName: + case DeclarationName::CXXUsingDirective: + break; + } + } + + void EmitData(raw_ostream& Out, key_type_ref, + data_type Lookup, unsigned DataLen) { + uint64_t Start = Out.tell(); (void)Start; + clang::io::Emit16(Out, Lookup.second - Lookup.first); + for (; Lookup.first != Lookup.second; ++Lookup.first) + clang::io::Emit32(Out, Writer.GetDeclRef(*Lookup.first)); + + assert(Out.tell() - Start == DataLen && "Data length is wrong"); + } +}; +} // end anonymous namespace + +/// \brief Write the block containing all of the declaration IDs +/// visible from the given DeclContext. +/// +/// \returns the offset of the DECL_CONTEXT_VISIBLE block within the +/// bitstream, or 0 if no block was written. +uint64_t ASTWriter::WriteDeclContextVisibleBlock(ASTContext &Context, + DeclContext *DC) { + if (DC->getPrimaryContext() != DC) + return 0; + + // Since there is no name lookup into functions or methods, don't bother to + // build a visible-declarations table for these entities. + if (DC->isFunctionOrMethod()) + return 0; + + // If not in C++, we perform name lookup for the translation unit via the + // IdentifierInfo chains, don't bother to build a visible-declarations table. + // FIXME: In C++ we need the visible declarations in order to "see" the + // friend declarations, is there a way to do this without writing the table ? + if (DC->isTranslationUnit() && !Context.getLangOpts().CPlusPlus) + return 0; + + // Serialize the contents of the mapping used for lookup. Note that, + // although we have two very different code paths, the serialized + // representation is the same for both cases: a declaration name, + // followed by a size, followed by references to the visible + // declarations that have that name. + uint64_t Offset = Stream.GetCurrentBitNo(); + StoredDeclsMap *Map = DC->buildLookup(); + if (!Map || Map->empty()) + return 0; + + OnDiskChainedHashTableGenerator<ASTDeclContextNameLookupTrait> Generator; + ASTDeclContextNameLookupTrait Trait(*this); + + // Create the on-disk hash table representation. + DeclarationName ConversionName; + llvm::SmallVector<NamedDecl *, 4> ConversionDecls; + for (StoredDeclsMap::iterator D = Map->begin(), DEnd = Map->end(); + D != DEnd; ++D) { + DeclarationName Name = D->first; + DeclContext::lookup_result Result = D->second.getLookupResult(); + if (Result.first != Result.second) { + if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName) { + // Hash all conversion function names to the same name. The actual + // type information in conversion function name is not used in the + // key (since such type information is not stable across different + // modules), so the intended effect is to coalesce all of the conversion + // functions under a single key. + if (!ConversionName) + ConversionName = Name; + ConversionDecls.append(Result.first, Result.second); + continue; + } + + Generator.insert(Name, Result, Trait); + } + } + + // Add the conversion functions + if (!ConversionDecls.empty()) { + Generator.insert(ConversionName, + DeclContext::lookup_result(ConversionDecls.begin(), + ConversionDecls.end()), + Trait); + } + + // Create the on-disk hash table in a buffer. + SmallString<4096> LookupTable; + uint32_t BucketOffset; + { + llvm::raw_svector_ostream Out(LookupTable); + // Make sure that no bucket is at offset 0 + clang::io::Emit32(Out, 0); + BucketOffset = Generator.Emit(Out, Trait); + } + + // Write the lookup table + RecordData Record; + Record.push_back(DECL_CONTEXT_VISIBLE); + Record.push_back(BucketOffset); + Stream.EmitRecordWithBlob(DeclContextVisibleLookupAbbrev, Record, + LookupTable.str()); + + Stream.EmitRecord(DECL_CONTEXT_VISIBLE, Record); + ++NumVisibleDeclContexts; + return Offset; +} + +/// \brief Write an UPDATE_VISIBLE block for the given context. +/// +/// UPDATE_VISIBLE blocks contain the declarations that are added to an existing +/// DeclContext in a dependent AST file. As such, they only exist for the TU +/// (in C++), for namespaces, and for classes with forward-declared unscoped +/// enumeration members (in C++11). +void ASTWriter::WriteDeclContextVisibleUpdate(const DeclContext *DC) { + StoredDeclsMap *Map = static_cast<StoredDeclsMap*>(DC->getLookupPtr()); + if (!Map || Map->empty()) + return; + + OnDiskChainedHashTableGenerator<ASTDeclContextNameLookupTrait> Generator; + ASTDeclContextNameLookupTrait Trait(*this); + + // Create the hash table. + for (StoredDeclsMap::iterator D = Map->begin(), DEnd = Map->end(); + D != DEnd; ++D) { + DeclarationName Name = D->first; + DeclContext::lookup_result Result = D->second.getLookupResult(); + // For any name that appears in this table, the results are complete, i.e. + // they overwrite results from previous PCHs. Merging is always a mess. + if (Result.first != Result.second) + Generator.insert(Name, Result, Trait); + } + + // Create the on-disk hash table in a buffer. + SmallString<4096> LookupTable; + uint32_t BucketOffset; + { + llvm::raw_svector_ostream Out(LookupTable); + // Make sure that no bucket is at offset 0 + clang::io::Emit32(Out, 0); + BucketOffset = Generator.Emit(Out, Trait); + } + + // Write the lookup table + RecordData Record; + Record.push_back(UPDATE_VISIBLE); + Record.push_back(getDeclID(cast<Decl>(DC))); + Record.push_back(BucketOffset); + Stream.EmitRecordWithBlob(UpdateVisibleAbbrev, Record, LookupTable.str()); +} + +/// \brief Write an FP_PRAGMA_OPTIONS block for the given FPOptions. +void ASTWriter::WriteFPPragmaOptions(const FPOptions &Opts) { + RecordData Record; + Record.push_back(Opts.fp_contract); + Stream.EmitRecord(FP_PRAGMA_OPTIONS, Record); +} + +/// \brief Write an OPENCL_EXTENSIONS block for the given OpenCLOptions. +void ASTWriter::WriteOpenCLExtensions(Sema &SemaRef) { + if (!SemaRef.Context.getLangOpts().OpenCL) + return; + + const OpenCLOptions &Opts = SemaRef.getOpenCLOptions(); + RecordData Record; +#define OPENCLEXT(nm) Record.push_back(Opts.nm); +#include "clang/Basic/OpenCLExtensions.def" + Stream.EmitRecord(OPENCL_EXTENSIONS, Record); +} + +void ASTWriter::WriteRedeclarations() { + RecordData LocalRedeclChains; + SmallVector<serialization::LocalRedeclarationsInfo, 2> LocalRedeclsMap; + + for (unsigned I = 0, N = Redeclarations.size(); I != N; ++I) { + Decl *First = Redeclarations[I]; + assert(First->getPreviousDecl() == 0 && "Not the first declaration?"); + + Decl *MostRecent = First->getMostRecentDecl(); + + // If we only have a single declaration, there is no point in storing + // a redeclaration chain. + if (First == MostRecent) + continue; + + unsigned Offset = LocalRedeclChains.size(); + unsigned Size = 0; + LocalRedeclChains.push_back(0); // Placeholder for the size. + + // Collect the set of local redeclarations of this declaration. + for (Decl *Prev = MostRecent; Prev != First; + Prev = Prev->getPreviousDecl()) { + if (!Prev->isFromASTFile()) { + AddDeclRef(Prev, LocalRedeclChains); + ++Size; + } + } + LocalRedeclChains[Offset] = Size; + + // Reverse the set of local redeclarations, so that we store them in + // order (since we found them in reverse order). + std::reverse(LocalRedeclChains.end() - Size, LocalRedeclChains.end()); + + // Add the mapping from the first ID to the set of local declarations. + LocalRedeclarationsInfo Info = { getDeclID(First), Offset }; + LocalRedeclsMap.push_back(Info); + + assert(N == Redeclarations.size() && + "Deserialized a declaration we shouldn't have"); + } + + if (LocalRedeclChains.empty()) + return; + + // Sort the local redeclarations map by the first declaration ID, + // since the reader will be performing binary searches on this information. + llvm::array_pod_sort(LocalRedeclsMap.begin(), LocalRedeclsMap.end()); + + // Emit the local redeclarations map. + using namespace llvm; + llvm::BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(LOCAL_REDECLARATIONS_MAP)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # of entries + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned AbbrevID = Stream.EmitAbbrev(Abbrev); + + RecordData Record; + Record.push_back(LOCAL_REDECLARATIONS_MAP); + Record.push_back(LocalRedeclsMap.size()); + Stream.EmitRecordWithBlob(AbbrevID, Record, + reinterpret_cast<char*>(LocalRedeclsMap.data()), + LocalRedeclsMap.size() * sizeof(LocalRedeclarationsInfo)); + + // Emit the redeclaration chains. + Stream.EmitRecord(LOCAL_REDECLARATIONS, LocalRedeclChains); +} + +void ASTWriter::WriteObjCCategories() { + llvm::SmallVector<ObjCCategoriesInfo, 2> CategoriesMap; + RecordData Categories; + + for (unsigned I = 0, N = ObjCClassesWithCategories.size(); I != N; ++I) { + unsigned Size = 0; + unsigned StartIndex = Categories.size(); + + ObjCInterfaceDecl *Class = ObjCClassesWithCategories[I]; + + // Allocate space for the size. + Categories.push_back(0); + + // Add the categories. + for (ObjCCategoryDecl *Cat = Class->getCategoryList(); + Cat; Cat = Cat->getNextClassCategory(), ++Size) { + assert(getDeclID(Cat) != 0 && "Bogus category"); + AddDeclRef(Cat, Categories); + } + + // Update the size. + Categories[StartIndex] = Size; + + // Record this interface -> category map. + ObjCCategoriesInfo CatInfo = { getDeclID(Class), StartIndex }; + CategoriesMap.push_back(CatInfo); + } + + // Sort the categories map by the definition ID, since the reader will be + // performing binary searches on this information. + llvm::array_pod_sort(CategoriesMap.begin(), CategoriesMap.end()); + + // Emit the categories map. + using namespace llvm; + llvm::BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(OBJC_CATEGORIES_MAP)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # of entries + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned AbbrevID = Stream.EmitAbbrev(Abbrev); + + RecordData Record; + Record.push_back(OBJC_CATEGORIES_MAP); + Record.push_back(CategoriesMap.size()); + Stream.EmitRecordWithBlob(AbbrevID, Record, + reinterpret_cast<char*>(CategoriesMap.data()), + CategoriesMap.size() * sizeof(ObjCCategoriesInfo)); + + // Emit the category lists. + Stream.EmitRecord(OBJC_CATEGORIES, Categories); +} + +void ASTWriter::WriteMergedDecls() { + if (!Chain || Chain->MergedDecls.empty()) + return; + + RecordData Record; + for (ASTReader::MergedDeclsMap::iterator I = Chain->MergedDecls.begin(), + IEnd = Chain->MergedDecls.end(); + I != IEnd; ++I) { + DeclID CanonID = I->first->isFromASTFile()? I->first->getGlobalID() + : getDeclID(I->first); + assert(CanonID && "Merged declaration not known?"); + + Record.push_back(CanonID); + Record.push_back(I->second.size()); + Record.append(I->second.begin(), I->second.end()); + } + Stream.EmitRecord(MERGED_DECLARATIONS, Record); +} + +//===----------------------------------------------------------------------===// +// General Serialization Routines +//===----------------------------------------------------------------------===// + +/// \brief Write a record containing the given attributes. +void ASTWriter::WriteAttributes(const AttrVec &Attrs, RecordDataImpl &Record) { + Record.push_back(Attrs.size()); + for (AttrVec::const_iterator i = Attrs.begin(), e = Attrs.end(); i != e; ++i){ + const Attr * A = *i; + Record.push_back(A->getKind()); // FIXME: stable encoding, target attrs + AddSourceRange(A->getRange(), Record); + +#include "clang/Serialization/AttrPCHWrite.inc" + + } +} + +void ASTWriter::AddString(StringRef Str, RecordDataImpl &Record) { + Record.push_back(Str.size()); + Record.insert(Record.end(), Str.begin(), Str.end()); +} + +void ASTWriter::AddVersionTuple(const VersionTuple &Version, + RecordDataImpl &Record) { + Record.push_back(Version.getMajor()); + if (llvm::Optional<unsigned> Minor = Version.getMinor()) + Record.push_back(*Minor + 1); + else + Record.push_back(0); + if (llvm::Optional<unsigned> Subminor = Version.getSubminor()) + Record.push_back(*Subminor + 1); + else + Record.push_back(0); +} + +/// \brief Note that the identifier II occurs at the given offset +/// within the identifier table. +void ASTWriter::SetIdentifierOffset(const IdentifierInfo *II, uint32_t Offset) { + IdentID ID = IdentifierIDs[II]; + // Only store offsets new to this AST file. Other identifier names are looked + // up earlier in the chain and thus don't need an offset. + if (ID >= FirstIdentID) + IdentifierOffsets[ID - FirstIdentID] = Offset; +} + +/// \brief Note that the selector Sel occurs at the given offset +/// within the method pool/selector table. +void ASTWriter::SetSelectorOffset(Selector Sel, uint32_t Offset) { + unsigned ID = SelectorIDs[Sel]; + assert(ID && "Unknown selector"); + // Don't record offsets for selectors that are also available in a different + // file. + if (ID < FirstSelectorID) + return; + SelectorOffsets[ID - FirstSelectorID] = Offset; +} + +ASTWriter::ASTWriter(llvm::BitstreamWriter &Stream) + : Stream(Stream), Context(0), PP(0), Chain(0), WritingModule(0), + WritingAST(false), ASTHasCompilerErrors(false), + FirstDeclID(NUM_PREDEF_DECL_IDS), NextDeclID(FirstDeclID), + FirstTypeID(NUM_PREDEF_TYPE_IDS), NextTypeID(FirstTypeID), + FirstIdentID(NUM_PREDEF_IDENT_IDS), NextIdentID(FirstIdentID), + FirstSubmoduleID(NUM_PREDEF_SUBMODULE_IDS), + NextSubmoduleID(FirstSubmoduleID), + FirstSelectorID(NUM_PREDEF_SELECTOR_IDS), NextSelectorID(FirstSelectorID), + CollectedStmts(&StmtsToEmit), + NumStatements(0), NumMacros(0), NumLexicalDeclContexts(0), + NumVisibleDeclContexts(0), + NextCXXBaseSpecifiersID(1), + DeclParmVarAbbrev(0), DeclContextLexicalAbbrev(0), + DeclContextVisibleLookupAbbrev(0), UpdateVisibleAbbrev(0), + DeclRefExprAbbrev(0), CharacterLiteralAbbrev(0), + DeclRecordAbbrev(0), IntegerLiteralAbbrev(0), + DeclTypedefAbbrev(0), + DeclVarAbbrev(0), DeclFieldAbbrev(0), + DeclEnumAbbrev(0), DeclObjCIvarAbbrev(0) +{ +} + +ASTWriter::~ASTWriter() { + for (FileDeclIDsTy::iterator + I = FileDeclIDs.begin(), E = FileDeclIDs.end(); I != E; ++I) + delete I->second; +} + +void ASTWriter::WriteAST(Sema &SemaRef, MemorizeStatCalls *StatCalls, + const std::string &OutputFile, + Module *WritingModule, StringRef isysroot, + bool hasErrors) { + WritingAST = true; + + ASTHasCompilerErrors = hasErrors; + + // Emit the file header. + Stream.Emit((unsigned)'C', 8); + Stream.Emit((unsigned)'P', 8); + Stream.Emit((unsigned)'C', 8); + Stream.Emit((unsigned)'H', 8); + + WriteBlockInfoBlock(); + + Context = &SemaRef.Context; + PP = &SemaRef.PP; + this->WritingModule = WritingModule; + WriteASTCore(SemaRef, StatCalls, isysroot, OutputFile, WritingModule); + Context = 0; + PP = 0; + this->WritingModule = 0; + + WritingAST = false; +} + +template<typename Vector> +static void AddLazyVectorDecls(ASTWriter &Writer, Vector &Vec, + ASTWriter::RecordData &Record) { + for (typename Vector::iterator I = Vec.begin(0, true), E = Vec.end(); + I != E; ++I) { + Writer.AddDeclRef(*I, Record); + } +} + +void ASTWriter::WriteASTCore(Sema &SemaRef, MemorizeStatCalls *StatCalls, + StringRef isysroot, + const std::string &OutputFile, + Module *WritingModule) { + using namespace llvm; + + // Make sure that the AST reader knows to finalize itself. + if (Chain) + Chain->finalizeForWriting(); + + ASTContext &Context = SemaRef.Context; + Preprocessor &PP = SemaRef.PP; + + // Set up predefined declaration IDs. + DeclIDs[Context.getTranslationUnitDecl()] = PREDEF_DECL_TRANSLATION_UNIT_ID; + if (Context.ObjCIdDecl) + DeclIDs[Context.ObjCIdDecl] = PREDEF_DECL_OBJC_ID_ID; + if (Context.ObjCSelDecl) + DeclIDs[Context.ObjCSelDecl] = PREDEF_DECL_OBJC_SEL_ID; + if (Context.ObjCClassDecl) + DeclIDs[Context.ObjCClassDecl] = PREDEF_DECL_OBJC_CLASS_ID; + if (Context.ObjCProtocolClassDecl) + DeclIDs[Context.ObjCProtocolClassDecl] = PREDEF_DECL_OBJC_PROTOCOL_ID; + if (Context.Int128Decl) + DeclIDs[Context.Int128Decl] = PREDEF_DECL_INT_128_ID; + if (Context.UInt128Decl) + DeclIDs[Context.UInt128Decl] = PREDEF_DECL_UNSIGNED_INT_128_ID; + if (Context.ObjCInstanceTypeDecl) + DeclIDs[Context.ObjCInstanceTypeDecl] = PREDEF_DECL_OBJC_INSTANCETYPE_ID; + + if (!Chain) { + // Make sure that we emit IdentifierInfos (and any attached + // declarations) for builtins. We don't need to do this when we're + // emitting chained PCH files, because all of the builtins will be + // in the original PCH file. + // FIXME: Modules won't like this at all. + IdentifierTable &Table = PP.getIdentifierTable(); + SmallVector<const char *, 32> BuiltinNames; + Context.BuiltinInfo.GetBuiltinNames(BuiltinNames, + Context.getLangOpts().NoBuiltin); + for (unsigned I = 0, N = BuiltinNames.size(); I != N; ++I) + getIdentifierRef(&Table.get(BuiltinNames[I])); + } + + // If there are any out-of-date identifiers, bring them up to date. + if (ExternalPreprocessorSource *ExtSource = PP.getExternalSource()) { + for (IdentifierTable::iterator ID = PP.getIdentifierTable().begin(), + IDEnd = PP.getIdentifierTable().end(); + ID != IDEnd; ++ID) + if (ID->second->isOutOfDate()) + ExtSource->updateOutOfDateIdentifier(*ID->second); + } + + // Build a record containing all of the tentative definitions in this file, in + // TentativeDefinitions order. Generally, this record will be empty for + // headers. + RecordData TentativeDefinitions; + AddLazyVectorDecls(*this, SemaRef.TentativeDefinitions, TentativeDefinitions); + + // Build a record containing all of the file scoped decls in this file. + RecordData UnusedFileScopedDecls; + AddLazyVectorDecls(*this, SemaRef.UnusedFileScopedDecls, + UnusedFileScopedDecls); + + // Build a record containing all of the delegating constructors we still need + // to resolve. + RecordData DelegatingCtorDecls; + AddLazyVectorDecls(*this, SemaRef.DelegatingCtorDecls, DelegatingCtorDecls); + + // Write the set of weak, undeclared identifiers. We always write the + // entire table, since later PCH files in a PCH chain are only interested in + // the results at the end of the chain. + RecordData WeakUndeclaredIdentifiers; + if (!SemaRef.WeakUndeclaredIdentifiers.empty()) { + for (llvm::DenseMap<IdentifierInfo*,WeakInfo>::iterator + I = SemaRef.WeakUndeclaredIdentifiers.begin(), + E = SemaRef.WeakUndeclaredIdentifiers.end(); I != E; ++I) { + AddIdentifierRef(I->first, WeakUndeclaredIdentifiers); + AddIdentifierRef(I->second.getAlias(), WeakUndeclaredIdentifiers); + AddSourceLocation(I->second.getLocation(), WeakUndeclaredIdentifiers); + WeakUndeclaredIdentifiers.push_back(I->second.getUsed()); + } + } + + // Build a record containing all of the locally-scoped external + // declarations in this header file. Generally, this record will be + // empty. + RecordData LocallyScopedExternalDecls; + // FIXME: This is filling in the AST file in densemap order which is + // nondeterminstic! + for (llvm::DenseMap<DeclarationName, NamedDecl *>::iterator + TD = SemaRef.LocallyScopedExternalDecls.begin(), + TDEnd = SemaRef.LocallyScopedExternalDecls.end(); + TD != TDEnd; ++TD) { + if (!TD->second->isFromASTFile()) + AddDeclRef(TD->second, LocallyScopedExternalDecls); + } + + // Build a record containing all of the ext_vector declarations. + RecordData ExtVectorDecls; + AddLazyVectorDecls(*this, SemaRef.ExtVectorDecls, ExtVectorDecls); + + // Build a record containing all of the VTable uses information. + RecordData VTableUses; + if (!SemaRef.VTableUses.empty()) { + for (unsigned I = 0, N = SemaRef.VTableUses.size(); I != N; ++I) { + AddDeclRef(SemaRef.VTableUses[I].first, VTableUses); + AddSourceLocation(SemaRef.VTableUses[I].second, VTableUses); + VTableUses.push_back(SemaRef.VTablesUsed[SemaRef.VTableUses[I].first]); + } + } + + // Build a record containing all of dynamic classes declarations. + RecordData DynamicClasses; + AddLazyVectorDecls(*this, SemaRef.DynamicClasses, DynamicClasses); + + // Build a record containing all of pending implicit instantiations. + RecordData PendingInstantiations; + for (std::deque<Sema::PendingImplicitInstantiation>::iterator + I = SemaRef.PendingInstantiations.begin(), + N = SemaRef.PendingInstantiations.end(); I != N; ++I) { + AddDeclRef(I->first, PendingInstantiations); + AddSourceLocation(I->second, PendingInstantiations); + } + assert(SemaRef.PendingLocalImplicitInstantiations.empty() && + "There are local ones at end of translation unit!"); + + // Build a record containing some declaration references. + RecordData SemaDeclRefs; + if (SemaRef.StdNamespace || SemaRef.StdBadAlloc) { + AddDeclRef(SemaRef.getStdNamespace(), SemaDeclRefs); + AddDeclRef(SemaRef.getStdBadAlloc(), SemaDeclRefs); + } + + RecordData CUDASpecialDeclRefs; + if (Context.getcudaConfigureCallDecl()) { + AddDeclRef(Context.getcudaConfigureCallDecl(), CUDASpecialDeclRefs); + } + + // Build a record containing all of the known namespaces. + RecordData KnownNamespaces; + for (llvm::DenseMap<NamespaceDecl*, bool>::iterator + I = SemaRef.KnownNamespaces.begin(), + IEnd = SemaRef.KnownNamespaces.end(); + I != IEnd; ++I) { + if (!I->second) + AddDeclRef(I->first, KnownNamespaces); + } + + // Write the remaining AST contents. + RecordData Record; + Stream.EnterSubblock(AST_BLOCK_ID, 5); + WriteMetadata(Context, isysroot, OutputFile); + WriteLanguageOptions(Context.getLangOpts()); + if (StatCalls && isysroot.empty()) + WriteStatCache(*StatCalls); + + // Create a lexical update block containing all of the declarations in the + // translation unit that do not come from other AST files. + const TranslationUnitDecl *TU = Context.getTranslationUnitDecl(); + SmallVector<KindDeclIDPair, 64> NewGlobalDecls; + for (DeclContext::decl_iterator I = TU->noload_decls_begin(), + E = TU->noload_decls_end(); + I != E; ++I) { + if (!(*I)->isFromASTFile()) + NewGlobalDecls.push_back(std::make_pair((*I)->getKind(), GetDeclRef(*I))); + } + + llvm::BitCodeAbbrev *Abv = new llvm::BitCodeAbbrev(); + Abv->Add(llvm::BitCodeAbbrevOp(TU_UPDATE_LEXICAL)); + Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::Blob)); + unsigned TuUpdateLexicalAbbrev = Stream.EmitAbbrev(Abv); + Record.clear(); + Record.push_back(TU_UPDATE_LEXICAL); + Stream.EmitRecordWithBlob(TuUpdateLexicalAbbrev, Record, + data(NewGlobalDecls)); + + // And a visible updates block for the translation unit. + Abv = new llvm::BitCodeAbbrev(); + Abv->Add(llvm::BitCodeAbbrevOp(UPDATE_VISIBLE)); + Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6)); + Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::Fixed, 32)); + Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::Blob)); + UpdateVisibleAbbrev = Stream.EmitAbbrev(Abv); + WriteDeclContextVisibleUpdate(TU); + + // If the translation unit has an anonymous namespace, and we don't already + // have an update block for it, write it as an update block. + if (NamespaceDecl *NS = TU->getAnonymousNamespace()) { + ASTWriter::UpdateRecord &Record = DeclUpdates[TU]; + if (Record.empty()) { + Record.push_back(UPD_CXX_ADDED_ANONYMOUS_NAMESPACE); + Record.push_back(reinterpret_cast<uint64_t>(NS)); + } + } + + // Resolve any declaration pointers within the declaration updates block. + ResolveDeclUpdatesBlocks(); + + // Form the record of special types. + RecordData SpecialTypes; + AddTypeRef(Context.getBuiltinVaListType(), SpecialTypes); + AddTypeRef(Context.getRawCFConstantStringType(), SpecialTypes); + AddTypeRef(Context.getFILEType(), SpecialTypes); + AddTypeRef(Context.getjmp_bufType(), SpecialTypes); + AddTypeRef(Context.getsigjmp_bufType(), SpecialTypes); + AddTypeRef(Context.ObjCIdRedefinitionType, SpecialTypes); + AddTypeRef(Context.ObjCClassRedefinitionType, SpecialTypes); + AddTypeRef(Context.ObjCSelRedefinitionType, SpecialTypes); + AddTypeRef(Context.getucontext_tType(), SpecialTypes); + + // Keep writing types and declarations until all types and + // declarations have been written. + Stream.EnterSubblock(DECLTYPES_BLOCK_ID, NUM_ALLOWED_ABBREVS_SIZE); + WriteDeclsBlockAbbrevs(); + for (DeclsToRewriteTy::iterator I = DeclsToRewrite.begin(), + E = DeclsToRewrite.end(); + I != E; ++I) + DeclTypesToEmit.push(const_cast<Decl*>(*I)); + while (!DeclTypesToEmit.empty()) { + DeclOrType DOT = DeclTypesToEmit.front(); + DeclTypesToEmit.pop(); + if (DOT.isType()) + WriteType(DOT.getType()); + else + WriteDecl(Context, DOT.getDecl()); + } + Stream.ExitBlock(); + + WriteFileDeclIDsMap(); + WriteSourceManagerBlock(Context.getSourceManager(), PP, isysroot); + + if (Chain) { + // Write the mapping information describing our module dependencies and how + // each of those modules were mapped into our own offset/ID space, so that + // the reader can build the appropriate mapping to its own offset/ID space. + // The map consists solely of a blob with the following format: + // *(module-name-len:i16 module-name:len*i8 + // source-location-offset:i32 + // identifier-id:i32 + // preprocessed-entity-id:i32 + // macro-definition-id:i32 + // submodule-id:i32 + // selector-id:i32 + // declaration-id:i32 + // c++-base-specifiers-id:i32 + // type-id:i32) + // + llvm::BitCodeAbbrev *Abbrev = new BitCodeAbbrev(); + Abbrev->Add(BitCodeAbbrevOp(MODULE_OFFSET_MAP)); + Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); + unsigned ModuleOffsetMapAbbrev = Stream.EmitAbbrev(Abbrev); + SmallString<2048> Buffer; + { + llvm::raw_svector_ostream Out(Buffer); + for (ModuleManager::ModuleConstIterator M = Chain->ModuleMgr.begin(), + MEnd = Chain->ModuleMgr.end(); + M != MEnd; ++M) { + StringRef FileName = (*M)->FileName; + io::Emit16(Out, FileName.size()); + Out.write(FileName.data(), FileName.size()); + io::Emit32(Out, (*M)->SLocEntryBaseOffset); + io::Emit32(Out, (*M)->BaseIdentifierID); + io::Emit32(Out, (*M)->BasePreprocessedEntityID); + io::Emit32(Out, (*M)->BaseSubmoduleID); + io::Emit32(Out, (*M)->BaseSelectorID); + io::Emit32(Out, (*M)->BaseDeclID); + io::Emit32(Out, (*M)->BaseTypeIndex); + } + } + Record.clear(); + Record.push_back(MODULE_OFFSET_MAP); + Stream.EmitRecordWithBlob(ModuleOffsetMapAbbrev, Record, + Buffer.data(), Buffer.size()); + } + WritePreprocessor(PP, WritingModule != 0); + WriteHeaderSearch(PP.getHeaderSearchInfo(), isysroot); + WriteSelectors(SemaRef); + WriteReferencedSelectorsPool(SemaRef); + WriteIdentifierTable(PP, SemaRef.IdResolver, WritingModule != 0); + WriteFPPragmaOptions(SemaRef.getFPOptions()); + WriteOpenCLExtensions(SemaRef); + + WriteTypeDeclOffsets(); + WritePragmaDiagnosticMappings(Context.getDiagnostics()); + + WriteCXXBaseSpecifiersOffsets(); + + // If we're emitting a module, write out the submodule information. + if (WritingModule) + WriteSubmodules(WritingModule); + + Stream.EmitRecord(SPECIAL_TYPES, SpecialTypes); + + // Write the record containing external, unnamed definitions. + if (!ExternalDefinitions.empty()) + Stream.EmitRecord(EXTERNAL_DEFINITIONS, ExternalDefinitions); + + // Write the record containing tentative definitions. + if (!TentativeDefinitions.empty()) + Stream.EmitRecord(TENTATIVE_DEFINITIONS, TentativeDefinitions); + + // Write the record containing unused file scoped decls. + if (!UnusedFileScopedDecls.empty()) + Stream.EmitRecord(UNUSED_FILESCOPED_DECLS, UnusedFileScopedDecls); + + // Write the record containing weak undeclared identifiers. + if (!WeakUndeclaredIdentifiers.empty()) + Stream.EmitRecord(WEAK_UNDECLARED_IDENTIFIERS, + WeakUndeclaredIdentifiers); + + // Write the record containing locally-scoped external definitions. + if (!LocallyScopedExternalDecls.empty()) + Stream.EmitRecord(LOCALLY_SCOPED_EXTERNAL_DECLS, + LocallyScopedExternalDecls); + + // Write the record containing ext_vector type names. + if (!ExtVectorDecls.empty()) + Stream.EmitRecord(EXT_VECTOR_DECLS, ExtVectorDecls); + + // Write the record containing VTable uses information. + if (!VTableUses.empty()) + Stream.EmitRecord(VTABLE_USES, VTableUses); + + // Write the record containing dynamic classes declarations. + if (!DynamicClasses.empty()) + Stream.EmitRecord(DYNAMIC_CLASSES, DynamicClasses); + + // Write the record containing pending implicit instantiations. + if (!PendingInstantiations.empty()) + Stream.EmitRecord(PENDING_IMPLICIT_INSTANTIATIONS, PendingInstantiations); + + // Write the record containing declaration references of Sema. + if (!SemaDeclRefs.empty()) + Stream.EmitRecord(SEMA_DECL_REFS, SemaDeclRefs); + + // Write the record containing CUDA-specific declaration references. + if (!CUDASpecialDeclRefs.empty()) + Stream.EmitRecord(CUDA_SPECIAL_DECL_REFS, CUDASpecialDeclRefs); + + // Write the delegating constructors. + if (!DelegatingCtorDecls.empty()) + Stream.EmitRecord(DELEGATING_CTORS, DelegatingCtorDecls); + + // Write the known namespaces. + if (!KnownNamespaces.empty()) + Stream.EmitRecord(KNOWN_NAMESPACES, KnownNamespaces); + + // Write the visible updates to DeclContexts. + for (llvm::SmallPtrSet<const DeclContext *, 16>::iterator + I = UpdatedDeclContexts.begin(), + E = UpdatedDeclContexts.end(); + I != E; ++I) + WriteDeclContextVisibleUpdate(*I); + + if (!WritingModule) { + // Write the submodules that were imported, if any. + RecordData ImportedModules; + for (ASTContext::import_iterator I = Context.local_import_begin(), + IEnd = Context.local_import_end(); + I != IEnd; ++I) { + assert(SubmoduleIDs.find(I->getImportedModule()) != SubmoduleIDs.end()); + ImportedModules.push_back(SubmoduleIDs[I->getImportedModule()]); + } + if (!ImportedModules.empty()) { + // Sort module IDs. + llvm::array_pod_sort(ImportedModules.begin(), ImportedModules.end()); + + // Unique module IDs. + ImportedModules.erase(std::unique(ImportedModules.begin(), + ImportedModules.end()), + ImportedModules.end()); + + Stream.EmitRecord(IMPORTED_MODULES, ImportedModules); + } + } + + WriteDeclUpdatesBlocks(); + WriteDeclReplacementsBlock(); + WriteMergedDecls(); + WriteRedeclarations(); + WriteObjCCategories(); + + // Some simple statistics + Record.clear(); + Record.push_back(NumStatements); + Record.push_back(NumMacros); + Record.push_back(NumLexicalDeclContexts); + Record.push_back(NumVisibleDeclContexts); + Stream.EmitRecord(STATISTICS, Record); + Stream.ExitBlock(); +} + +/// \brief Go through the declaration update blocks and resolve declaration +/// pointers into declaration IDs. +void ASTWriter::ResolveDeclUpdatesBlocks() { + for (DeclUpdateMap::iterator + I = DeclUpdates.begin(), E = DeclUpdates.end(); I != E; ++I) { + const Decl *D = I->first; + UpdateRecord &URec = I->second; + + if (isRewritten(D)) + continue; // The decl will be written completely + + unsigned Idx = 0, N = URec.size(); + while (Idx < N) { + switch ((DeclUpdateKind)URec[Idx++]) { + case UPD_CXX_ADDED_IMPLICIT_MEMBER: + case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION: + case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: + URec[Idx] = GetDeclRef(reinterpret_cast<Decl *>(URec[Idx])); + ++Idx; + break; + + case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER: + ++Idx; + break; + } + } + } +} + +void ASTWriter::WriteDeclUpdatesBlocks() { + if (DeclUpdates.empty()) + return; + + RecordData OffsetsRecord; + Stream.EnterSubblock(DECL_UPDATES_BLOCK_ID, NUM_ALLOWED_ABBREVS_SIZE); + for (DeclUpdateMap::iterator + I = DeclUpdates.begin(), E = DeclUpdates.end(); I != E; ++I) { + const Decl *D = I->first; + UpdateRecord &URec = I->second; + + if (isRewritten(D)) + continue; // The decl will be written completely,no need to store updates. + + uint64_t Offset = Stream.GetCurrentBitNo(); + Stream.EmitRecord(DECL_UPDATES, URec); + + OffsetsRecord.push_back(GetDeclRef(D)); + OffsetsRecord.push_back(Offset); + } + Stream.ExitBlock(); + Stream.EmitRecord(DECL_UPDATE_OFFSETS, OffsetsRecord); +} + +void ASTWriter::WriteDeclReplacementsBlock() { + if (ReplacedDecls.empty()) + return; + + RecordData Record; + for (SmallVector<ReplacedDeclInfo, 16>::iterator + I = ReplacedDecls.begin(), E = ReplacedDecls.end(); I != E; ++I) { + Record.push_back(I->ID); + Record.push_back(I->Offset); + Record.push_back(I->Loc); + } + Stream.EmitRecord(DECL_REPLACEMENTS, Record); +} + +void ASTWriter::AddSourceLocation(SourceLocation Loc, RecordDataImpl &Record) { + Record.push_back(Loc.getRawEncoding()); +} + +void ASTWriter::AddSourceRange(SourceRange Range, RecordDataImpl &Record) { + AddSourceLocation(Range.getBegin(), Record); + AddSourceLocation(Range.getEnd(), Record); +} + +void ASTWriter::AddAPInt(const llvm::APInt &Value, RecordDataImpl &Record) { + Record.push_back(Value.getBitWidth()); + const uint64_t *Words = Value.getRawData(); + Record.append(Words, Words + Value.getNumWords()); +} + +void ASTWriter::AddAPSInt(const llvm::APSInt &Value, RecordDataImpl &Record) { + Record.push_back(Value.isUnsigned()); + AddAPInt(Value, Record); +} + +void ASTWriter::AddAPFloat(const llvm::APFloat &Value, RecordDataImpl &Record) { + AddAPInt(Value.bitcastToAPInt(), Record); +} + +void ASTWriter::AddIdentifierRef(const IdentifierInfo *II, RecordDataImpl &Record) { + Record.push_back(getIdentifierRef(II)); +} + +IdentID ASTWriter::getIdentifierRef(const IdentifierInfo *II) { + if (II == 0) + return 0; + + IdentID &ID = IdentifierIDs[II]; + if (ID == 0) + ID = NextIdentID++; + return ID; +} + +void ASTWriter::AddSelectorRef(const Selector SelRef, RecordDataImpl &Record) { + Record.push_back(getSelectorRef(SelRef)); +} + +SelectorID ASTWriter::getSelectorRef(Selector Sel) { + if (Sel.getAsOpaquePtr() == 0) { + return 0; + } + + SelectorID &SID = SelectorIDs[Sel]; + if (SID == 0 && Chain) { + // This might trigger a ReadSelector callback, which will set the ID for + // this selector. + Chain->LoadSelector(Sel); + } + if (SID == 0) { + SID = NextSelectorID++; + } + return SID; +} + +void ASTWriter::AddCXXTemporary(const CXXTemporary *Temp, RecordDataImpl &Record) { + AddDeclRef(Temp->getDestructor(), Record); +} + +void ASTWriter::AddCXXBaseSpecifiersRef(CXXBaseSpecifier const *Bases, + CXXBaseSpecifier const *BasesEnd, + RecordDataImpl &Record) { + assert(Bases != BasesEnd && "Empty base-specifier sets are not recorded"); + CXXBaseSpecifiersToWrite.push_back( + QueuedCXXBaseSpecifiers(NextCXXBaseSpecifiersID, + Bases, BasesEnd)); + Record.push_back(NextCXXBaseSpecifiersID++); +} + +void ASTWriter::AddTemplateArgumentLocInfo(TemplateArgument::ArgKind Kind, + const TemplateArgumentLocInfo &Arg, + RecordDataImpl &Record) { + switch (Kind) { + case TemplateArgument::Expression: + AddStmt(Arg.getAsExpr()); + break; + case TemplateArgument::Type: + AddTypeSourceInfo(Arg.getAsTypeSourceInfo(), Record); + break; + case TemplateArgument::Template: + AddNestedNameSpecifierLoc(Arg.getTemplateQualifierLoc(), Record); + AddSourceLocation(Arg.getTemplateNameLoc(), Record); + break; + case TemplateArgument::TemplateExpansion: + AddNestedNameSpecifierLoc(Arg.getTemplateQualifierLoc(), Record); + AddSourceLocation(Arg.getTemplateNameLoc(), Record); + AddSourceLocation(Arg.getTemplateEllipsisLoc(), Record); + break; + case TemplateArgument::Null: + case TemplateArgument::Integral: + case TemplateArgument::Declaration: + case TemplateArgument::Pack: + break; + } +} + +void ASTWriter::AddTemplateArgumentLoc(const TemplateArgumentLoc &Arg, + RecordDataImpl &Record) { + AddTemplateArgument(Arg.getArgument(), Record); + + if (Arg.getArgument().getKind() == TemplateArgument::Expression) { + bool InfoHasSameExpr + = Arg.getArgument().getAsExpr() == Arg.getLocInfo().getAsExpr(); + Record.push_back(InfoHasSameExpr); + if (InfoHasSameExpr) + return; // Avoid storing the same expr twice. + } + AddTemplateArgumentLocInfo(Arg.getArgument().getKind(), Arg.getLocInfo(), + Record); +} + +void ASTWriter::AddTypeSourceInfo(TypeSourceInfo *TInfo, + RecordDataImpl &Record) { + if (TInfo == 0) { + AddTypeRef(QualType(), Record); + return; + } + + AddTypeLoc(TInfo->getTypeLoc(), Record); +} + +void ASTWriter::AddTypeLoc(TypeLoc TL, RecordDataImpl &Record) { + AddTypeRef(TL.getType(), Record); + + TypeLocWriter TLW(*this, Record); + for (; !TL.isNull(); TL = TL.getNextTypeLoc()) + TLW.Visit(TL); +} + +void ASTWriter::AddTypeRef(QualType T, RecordDataImpl &Record) { + Record.push_back(GetOrCreateTypeID(T)); +} + +TypeID ASTWriter::GetOrCreateTypeID( QualType T) { + return MakeTypeID(*Context, T, + std::bind1st(std::mem_fun(&ASTWriter::GetOrCreateTypeIdx), this)); +} + +TypeID ASTWriter::getTypeID(QualType T) const { + return MakeTypeID(*Context, T, + std::bind1st(std::mem_fun(&ASTWriter::getTypeIdx), this)); +} + +TypeIdx ASTWriter::GetOrCreateTypeIdx(QualType T) { + if (T.isNull()) + return TypeIdx(); + assert(!T.getLocalFastQualifiers()); + + TypeIdx &Idx = TypeIdxs[T]; + if (Idx.getIndex() == 0) { + // We haven't seen this type before. Assign it a new ID and put it + // into the queue of types to emit. + Idx = TypeIdx(NextTypeID++); + DeclTypesToEmit.push(T); + } + return Idx; +} + +TypeIdx ASTWriter::getTypeIdx(QualType T) const { + if (T.isNull()) + return TypeIdx(); + assert(!T.getLocalFastQualifiers()); + + TypeIdxMap::const_iterator I = TypeIdxs.find(T); + assert(I != TypeIdxs.end() && "Type not emitted!"); + return I->second; +} + +void ASTWriter::AddDeclRef(const Decl *D, RecordDataImpl &Record) { + Record.push_back(GetDeclRef(D)); +} + +DeclID ASTWriter::GetDeclRef(const Decl *D) { + assert(WritingAST && "Cannot request a declaration ID before AST writing"); + + if (D == 0) { + return 0; + } + + // If D comes from an AST file, its declaration ID is already known and + // fixed. + if (D->isFromASTFile()) + return D->getGlobalID(); + + assert(!(reinterpret_cast<uintptr_t>(D) & 0x01) && "Invalid decl pointer"); + DeclID &ID = DeclIDs[D]; + if (ID == 0) { + // We haven't seen this declaration before. Give it a new ID and + // enqueue it in the list of declarations to emit. + ID = NextDeclID++; + DeclTypesToEmit.push(const_cast<Decl *>(D)); + } + + return ID; +} + +DeclID ASTWriter::getDeclID(const Decl *D) { + if (D == 0) + return 0; + + // If D comes from an AST file, its declaration ID is already known and + // fixed. + if (D->isFromASTFile()) + return D->getGlobalID(); + + assert(DeclIDs.find(D) != DeclIDs.end() && "Declaration not emitted!"); + return DeclIDs[D]; +} + +static inline bool compLocDecl(std::pair<unsigned, serialization::DeclID> L, + std::pair<unsigned, serialization::DeclID> R) { + return L.first < R.first; +} + +void ASTWriter::associateDeclWithFile(const Decl *D, DeclID ID) { + assert(ID); + assert(D); + + SourceLocation Loc = D->getLocation(); + if (Loc.isInvalid()) + return; + + // We only keep track of the file-level declarations of each file. + if (!D->getLexicalDeclContext()->isFileContext()) + return; + // FIXME: ParmVarDecls that are part of a function type of a parameter of + // a function/objc method, should not have TU as lexical context. + if (isa<ParmVarDecl>(D)) + return; + + SourceManager &SM = Context->getSourceManager(); + SourceLocation FileLoc = SM.getFileLoc(Loc); + assert(SM.isLocalSourceLocation(FileLoc)); + FileID FID; + unsigned Offset; + llvm::tie(FID, Offset) = SM.getDecomposedLoc(FileLoc); + if (FID.isInvalid()) + return; + const SrcMgr::SLocEntry *Entry = &SM.getSLocEntry(FID); + assert(Entry->isFile()); + + DeclIDInFileInfo *&Info = FileDeclIDs[Entry]; + if (!Info) + Info = new DeclIDInFileInfo(); + + std::pair<unsigned, serialization::DeclID> LocDecl(Offset, ID); + LocDeclIDsTy &Decls = Info->DeclIDs; + + if (Decls.empty() || Decls.back().first <= Offset) { + Decls.push_back(LocDecl); + return; + } + + LocDeclIDsTy::iterator + I = std::upper_bound(Decls.begin(), Decls.end(), LocDecl, compLocDecl); + + Decls.insert(I, LocDecl); +} + +void ASTWriter::AddDeclarationName(DeclarationName Name, RecordDataImpl &Record) { + // FIXME: Emit a stable enum for NameKind. 0 = Identifier etc. + Record.push_back(Name.getNameKind()); + switch (Name.getNameKind()) { + case DeclarationName::Identifier: + AddIdentifierRef(Name.getAsIdentifierInfo(), Record); + break; + + case DeclarationName::ObjCZeroArgSelector: + case DeclarationName::ObjCOneArgSelector: + case DeclarationName::ObjCMultiArgSelector: + AddSelectorRef(Name.getObjCSelector(), Record); + break; + + case DeclarationName::CXXConstructorName: + case DeclarationName::CXXDestructorName: + case DeclarationName::CXXConversionFunctionName: + AddTypeRef(Name.getCXXNameType(), Record); + break; + + case DeclarationName::CXXOperatorName: + Record.push_back(Name.getCXXOverloadedOperator()); + break; + + case DeclarationName::CXXLiteralOperatorName: + AddIdentifierRef(Name.getCXXLiteralIdentifier(), Record); + break; + + case DeclarationName::CXXUsingDirective: + // No extra data to emit + break; + } +} + +void ASTWriter::AddDeclarationNameLoc(const DeclarationNameLoc &DNLoc, + DeclarationName Name, RecordDataImpl &Record) { + switch (Name.getNameKind()) { + case DeclarationName::CXXConstructorName: + case DeclarationName::CXXDestructorName: + case DeclarationName::CXXConversionFunctionName: + AddTypeSourceInfo(DNLoc.NamedType.TInfo, Record); + break; + + case DeclarationName::CXXOperatorName: + AddSourceLocation( + SourceLocation::getFromRawEncoding(DNLoc.CXXOperatorName.BeginOpNameLoc), + Record); + AddSourceLocation( + SourceLocation::getFromRawEncoding(DNLoc.CXXOperatorName.EndOpNameLoc), + Record); + break; + + case DeclarationName::CXXLiteralOperatorName: + AddSourceLocation( + SourceLocation::getFromRawEncoding(DNLoc.CXXLiteralOperatorName.OpNameLoc), + Record); + break; + + case DeclarationName::Identifier: + case DeclarationName::ObjCZeroArgSelector: + case DeclarationName::ObjCOneArgSelector: + case DeclarationName::ObjCMultiArgSelector: + case DeclarationName::CXXUsingDirective: + break; + } +} + +void ASTWriter::AddDeclarationNameInfo(const DeclarationNameInfo &NameInfo, + RecordDataImpl &Record) { + AddDeclarationName(NameInfo.getName(), Record); + AddSourceLocation(NameInfo.getLoc(), Record); + AddDeclarationNameLoc(NameInfo.getInfo(), NameInfo.getName(), Record); +} + +void ASTWriter::AddQualifierInfo(const QualifierInfo &Info, + RecordDataImpl &Record) { + AddNestedNameSpecifierLoc(Info.QualifierLoc, Record); + Record.push_back(Info.NumTemplParamLists); + for (unsigned i=0, e=Info.NumTemplParamLists; i != e; ++i) + AddTemplateParameterList(Info.TemplParamLists[i], Record); +} + +void ASTWriter::AddNestedNameSpecifier(NestedNameSpecifier *NNS, + RecordDataImpl &Record) { + // Nested name specifiers usually aren't too long. I think that 8 would + // typically accommodate the vast majority. + SmallVector<NestedNameSpecifier *, 8> NestedNames; + + // Push each of the NNS's onto a stack for serialization in reverse order. + while (NNS) { + NestedNames.push_back(NNS); + NNS = NNS->getPrefix(); + } + + Record.push_back(NestedNames.size()); + while(!NestedNames.empty()) { + NNS = NestedNames.pop_back_val(); + NestedNameSpecifier::SpecifierKind Kind = NNS->getKind(); + Record.push_back(Kind); + switch (Kind) { + case NestedNameSpecifier::Identifier: + AddIdentifierRef(NNS->getAsIdentifier(), Record); + break; + + case NestedNameSpecifier::Namespace: + AddDeclRef(NNS->getAsNamespace(), Record); + break; + + case NestedNameSpecifier::NamespaceAlias: + AddDeclRef(NNS->getAsNamespaceAlias(), Record); + break; + + case NestedNameSpecifier::TypeSpec: + case NestedNameSpecifier::TypeSpecWithTemplate: + AddTypeRef(QualType(NNS->getAsType(), 0), Record); + Record.push_back(Kind == NestedNameSpecifier::TypeSpecWithTemplate); + break; + + case NestedNameSpecifier::Global: + // Don't need to write an associated value. + break; + } + } +} + +void ASTWriter::AddNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, + RecordDataImpl &Record) { + // Nested name specifiers usually aren't too long. I think that 8 would + // typically accommodate the vast majority. + SmallVector<NestedNameSpecifierLoc , 8> NestedNames; + + // Push each of the nested-name-specifiers's onto a stack for + // serialization in reverse order. + while (NNS) { + NestedNames.push_back(NNS); + NNS = NNS.getPrefix(); + } + + Record.push_back(NestedNames.size()); + while(!NestedNames.empty()) { + NNS = NestedNames.pop_back_val(); + NestedNameSpecifier::SpecifierKind Kind + = NNS.getNestedNameSpecifier()->getKind(); + Record.push_back(Kind); + switch (Kind) { + case NestedNameSpecifier::Identifier: + AddIdentifierRef(NNS.getNestedNameSpecifier()->getAsIdentifier(), Record); + AddSourceRange(NNS.getLocalSourceRange(), Record); + break; + + case NestedNameSpecifier::Namespace: + AddDeclRef(NNS.getNestedNameSpecifier()->getAsNamespace(), Record); + AddSourceRange(NNS.getLocalSourceRange(), Record); + break; + + case NestedNameSpecifier::NamespaceAlias: + AddDeclRef(NNS.getNestedNameSpecifier()->getAsNamespaceAlias(), Record); + AddSourceRange(NNS.getLocalSourceRange(), Record); + break; + + case NestedNameSpecifier::TypeSpec: + case NestedNameSpecifier::TypeSpecWithTemplate: + Record.push_back(Kind == NestedNameSpecifier::TypeSpecWithTemplate); + AddTypeLoc(NNS.getTypeLoc(), Record); + AddSourceLocation(NNS.getLocalSourceRange().getEnd(), Record); + break; + + case NestedNameSpecifier::Global: + AddSourceLocation(NNS.getLocalSourceRange().getEnd(), Record); + break; + } + } +} + +void ASTWriter::AddTemplateName(TemplateName Name, RecordDataImpl &Record) { + TemplateName::NameKind Kind = Name.getKind(); + Record.push_back(Kind); + switch (Kind) { + case TemplateName::Template: + AddDeclRef(Name.getAsTemplateDecl(), Record); + break; + + case TemplateName::OverloadedTemplate: { + OverloadedTemplateStorage *OvT = Name.getAsOverloadedTemplate(); + Record.push_back(OvT->size()); + for (OverloadedTemplateStorage::iterator I = OvT->begin(), E = OvT->end(); + I != E; ++I) + AddDeclRef(*I, Record); + break; + } + + case TemplateName::QualifiedTemplate: { + QualifiedTemplateName *QualT = Name.getAsQualifiedTemplateName(); + AddNestedNameSpecifier(QualT->getQualifier(), Record); + Record.push_back(QualT->hasTemplateKeyword()); + AddDeclRef(QualT->getTemplateDecl(), Record); + break; + } + + case TemplateName::DependentTemplate: { + DependentTemplateName *DepT = Name.getAsDependentTemplateName(); + AddNestedNameSpecifier(DepT->getQualifier(), Record); + Record.push_back(DepT->isIdentifier()); + if (DepT->isIdentifier()) + AddIdentifierRef(DepT->getIdentifier(), Record); + else + Record.push_back(DepT->getOperator()); + break; + } + + case TemplateName::SubstTemplateTemplateParm: { + SubstTemplateTemplateParmStorage *subst + = Name.getAsSubstTemplateTemplateParm(); + AddDeclRef(subst->getParameter(), Record); + AddTemplateName(subst->getReplacement(), Record); + break; + } + + case TemplateName::SubstTemplateTemplateParmPack: { + SubstTemplateTemplateParmPackStorage *SubstPack + = Name.getAsSubstTemplateTemplateParmPack(); + AddDeclRef(SubstPack->getParameterPack(), Record); + AddTemplateArgument(SubstPack->getArgumentPack(), Record); + break; + } + } +} + +void ASTWriter::AddTemplateArgument(const TemplateArgument &Arg, + RecordDataImpl &Record) { + Record.push_back(Arg.getKind()); + switch (Arg.getKind()) { + case TemplateArgument::Null: + break; + case TemplateArgument::Type: + AddTypeRef(Arg.getAsType(), Record); + break; + case TemplateArgument::Declaration: + AddDeclRef(Arg.getAsDecl(), Record); + break; + case TemplateArgument::Integral: + AddAPSInt(*Arg.getAsIntegral(), Record); + AddTypeRef(Arg.getIntegralType(), Record); + break; + case TemplateArgument::Template: + AddTemplateName(Arg.getAsTemplateOrTemplatePattern(), Record); + break; + case TemplateArgument::TemplateExpansion: + AddTemplateName(Arg.getAsTemplateOrTemplatePattern(), Record); + if (llvm::Optional<unsigned> NumExpansions = Arg.getNumTemplateExpansions()) + Record.push_back(*NumExpansions + 1); + else + Record.push_back(0); + break; + case TemplateArgument::Expression: + AddStmt(Arg.getAsExpr()); + break; + case TemplateArgument::Pack: + Record.push_back(Arg.pack_size()); + for (TemplateArgument::pack_iterator I=Arg.pack_begin(), E=Arg.pack_end(); + I != E; ++I) + AddTemplateArgument(*I, Record); + break; + } +} + +void +ASTWriter::AddTemplateParameterList(const TemplateParameterList *TemplateParams, + RecordDataImpl &Record) { + assert(TemplateParams && "No TemplateParams!"); + AddSourceLocation(TemplateParams->getTemplateLoc(), Record); + AddSourceLocation(TemplateParams->getLAngleLoc(), Record); + AddSourceLocation(TemplateParams->getRAngleLoc(), Record); + Record.push_back(TemplateParams->size()); + for (TemplateParameterList::const_iterator + P = TemplateParams->begin(), PEnd = TemplateParams->end(); + P != PEnd; ++P) + AddDeclRef(*P, Record); +} + +/// \brief Emit a template argument list. +void +ASTWriter::AddTemplateArgumentList(const TemplateArgumentList *TemplateArgs, + RecordDataImpl &Record) { + assert(TemplateArgs && "No TemplateArgs!"); + Record.push_back(TemplateArgs->size()); + for (int i=0, e = TemplateArgs->size(); i != e; ++i) + AddTemplateArgument(TemplateArgs->get(i), Record); +} + + +void +ASTWriter::AddUnresolvedSet(const UnresolvedSetImpl &Set, RecordDataImpl &Record) { + Record.push_back(Set.size()); + for (UnresolvedSetImpl::const_iterator + I = Set.begin(), E = Set.end(); I != E; ++I) { + AddDeclRef(I.getDecl(), Record); + Record.push_back(I.getAccess()); + } +} + +void ASTWriter::AddCXXBaseSpecifier(const CXXBaseSpecifier &Base, + RecordDataImpl &Record) { + Record.push_back(Base.isVirtual()); + Record.push_back(Base.isBaseOfClass()); + Record.push_back(Base.getAccessSpecifierAsWritten()); + Record.push_back(Base.getInheritConstructors()); + AddTypeSourceInfo(Base.getTypeSourceInfo(), Record); + AddSourceRange(Base.getSourceRange(), Record); + AddSourceLocation(Base.isPackExpansion()? Base.getEllipsisLoc() + : SourceLocation(), + Record); +} + +void ASTWriter::FlushCXXBaseSpecifiers() { + RecordData Record; + for (unsigned I = 0, N = CXXBaseSpecifiersToWrite.size(); I != N; ++I) { + Record.clear(); + + // Record the offset of this base-specifier set. + unsigned Index = CXXBaseSpecifiersToWrite[I].ID - 1; + if (Index == CXXBaseSpecifiersOffsets.size()) + CXXBaseSpecifiersOffsets.push_back(Stream.GetCurrentBitNo()); + else { + if (Index > CXXBaseSpecifiersOffsets.size()) + CXXBaseSpecifiersOffsets.resize(Index + 1); + CXXBaseSpecifiersOffsets[Index] = Stream.GetCurrentBitNo(); + } + + const CXXBaseSpecifier *B = CXXBaseSpecifiersToWrite[I].Bases, + *BEnd = CXXBaseSpecifiersToWrite[I].BasesEnd; + Record.push_back(BEnd - B); + for (; B != BEnd; ++B) + AddCXXBaseSpecifier(*B, Record); + Stream.EmitRecord(serialization::DECL_CXX_BASE_SPECIFIERS, Record); + + // Flush any expressions that were written as part of the base specifiers. + FlushStmts(); + } + + CXXBaseSpecifiersToWrite.clear(); +} + +void ASTWriter::AddCXXCtorInitializers( + const CXXCtorInitializer * const *CtorInitializers, + unsigned NumCtorInitializers, + RecordDataImpl &Record) { + Record.push_back(NumCtorInitializers); + for (unsigned i=0; i != NumCtorInitializers; ++i) { + const CXXCtorInitializer *Init = CtorInitializers[i]; + + if (Init->isBaseInitializer()) { + Record.push_back(CTOR_INITIALIZER_BASE); + AddTypeSourceInfo(Init->getTypeSourceInfo(), Record); + Record.push_back(Init->isBaseVirtual()); + } else if (Init->isDelegatingInitializer()) { + Record.push_back(CTOR_INITIALIZER_DELEGATING); + AddTypeSourceInfo(Init->getTypeSourceInfo(), Record); + } else if (Init->isMemberInitializer()){ + Record.push_back(CTOR_INITIALIZER_MEMBER); + AddDeclRef(Init->getMember(), Record); + } else { + Record.push_back(CTOR_INITIALIZER_INDIRECT_MEMBER); + AddDeclRef(Init->getIndirectMember(), Record); + } + + AddSourceLocation(Init->getMemberLocation(), Record); + AddStmt(Init->getInit()); + AddSourceLocation(Init->getLParenLoc(), Record); + AddSourceLocation(Init->getRParenLoc(), Record); + Record.push_back(Init->isWritten()); + if (Init->isWritten()) { + Record.push_back(Init->getSourceOrder()); + } else { + Record.push_back(Init->getNumArrayIndices()); + for (unsigned i=0, e=Init->getNumArrayIndices(); i != e; ++i) + AddDeclRef(Init->getArrayIndex(i), Record); + } + } +} + +void ASTWriter::AddCXXDefinitionData(const CXXRecordDecl *D, RecordDataImpl &Record) { + assert(D->DefinitionData); + struct CXXRecordDecl::DefinitionData &Data = *D->DefinitionData; + Record.push_back(Data.IsLambda); + Record.push_back(Data.UserDeclaredConstructor); + Record.push_back(Data.UserDeclaredCopyConstructor); + Record.push_back(Data.UserDeclaredMoveConstructor); + Record.push_back(Data.UserDeclaredCopyAssignment); + Record.push_back(Data.UserDeclaredMoveAssignment); + Record.push_back(Data.UserDeclaredDestructor); + Record.push_back(Data.Aggregate); + Record.push_back(Data.PlainOldData); + Record.push_back(Data.Empty); + Record.push_back(Data.Polymorphic); + Record.push_back(Data.Abstract); + Record.push_back(Data.IsStandardLayout); + Record.push_back(Data.HasNoNonEmptyBases); + Record.push_back(Data.HasPrivateFields); + Record.push_back(Data.HasProtectedFields); + Record.push_back(Data.HasPublicFields); + Record.push_back(Data.HasMutableFields); + Record.push_back(Data.HasOnlyCMembers); + Record.push_back(Data.HasTrivialDefaultConstructor); + Record.push_back(Data.HasConstexprNonCopyMoveConstructor); + Record.push_back(Data.DefaultedDefaultConstructorIsConstexpr); + Record.push_back(Data.DefaultedCopyConstructorIsConstexpr); + Record.push_back(Data.DefaultedMoveConstructorIsConstexpr); + Record.push_back(Data.HasConstexprDefaultConstructor); + Record.push_back(Data.HasConstexprCopyConstructor); + Record.push_back(Data.HasConstexprMoveConstructor); + Record.push_back(Data.HasTrivialCopyConstructor); + Record.push_back(Data.HasTrivialMoveConstructor); + Record.push_back(Data.HasTrivialCopyAssignment); + Record.push_back(Data.HasTrivialMoveAssignment); + Record.push_back(Data.HasTrivialDestructor); + Record.push_back(Data.HasIrrelevantDestructor); + Record.push_back(Data.HasNonLiteralTypeFieldsOrBases); + Record.push_back(Data.ComputedVisibleConversions); + Record.push_back(Data.UserProvidedDefaultConstructor); + Record.push_back(Data.DeclaredDefaultConstructor); + Record.push_back(Data.DeclaredCopyConstructor); + Record.push_back(Data.DeclaredMoveConstructor); + Record.push_back(Data.DeclaredCopyAssignment); + Record.push_back(Data.DeclaredMoveAssignment); + Record.push_back(Data.DeclaredDestructor); + Record.push_back(Data.FailedImplicitMoveConstructor); + Record.push_back(Data.FailedImplicitMoveAssignment); + // IsLambda bit is already saved. + + Record.push_back(Data.NumBases); + if (Data.NumBases > 0) + AddCXXBaseSpecifiersRef(Data.getBases(), Data.getBases() + Data.NumBases, + Record); + + // FIXME: Make VBases lazily computed when needed to avoid storing them. + Record.push_back(Data.NumVBases); + if (Data.NumVBases > 0) + AddCXXBaseSpecifiersRef(Data.getVBases(), Data.getVBases() + Data.NumVBases, + Record); + + AddUnresolvedSet(Data.Conversions, Record); + AddUnresolvedSet(Data.VisibleConversions, Record); + // Data.Definition is the owning decl, no need to write it. + AddDeclRef(Data.FirstFriend, Record); + + // Add lambda-specific data. + if (Data.IsLambda) { + CXXRecordDecl::LambdaDefinitionData &Lambda = D->getLambdaData(); + Record.push_back(Lambda.Dependent); + Record.push_back(Lambda.NumCaptures); + Record.push_back(Lambda.NumExplicitCaptures); + Record.push_back(Lambda.ManglingNumber); + AddDeclRef(Lambda.ContextDecl, Record); + for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) { + LambdaExpr::Capture &Capture = Lambda.Captures[I]; + AddSourceLocation(Capture.getLocation(), Record); + Record.push_back(Capture.isImplicit()); + Record.push_back(Capture.getCaptureKind()); // FIXME: stable! + VarDecl *Var = Capture.capturesVariable()? Capture.getCapturedVar() : 0; + AddDeclRef(Var, Record); + AddSourceLocation(Capture.isPackExpansion()? Capture.getEllipsisLoc() + : SourceLocation(), + Record); + } + } +} + +void ASTWriter::ReaderInitialized(ASTReader *Reader) { + assert(Reader && "Cannot remove chain"); + assert((!Chain || Chain == Reader) && "Cannot replace chain"); + assert(FirstDeclID == NextDeclID && + FirstTypeID == NextTypeID && + FirstIdentID == NextIdentID && + FirstSubmoduleID == NextSubmoduleID && + FirstSelectorID == NextSelectorID && + "Setting chain after writing has started."); + + Chain = Reader; + + FirstDeclID = NUM_PREDEF_DECL_IDS + Chain->getTotalNumDecls(); + FirstTypeID = NUM_PREDEF_TYPE_IDS + Chain->getTotalNumTypes(); + FirstIdentID = NUM_PREDEF_IDENT_IDS + Chain->getTotalNumIdentifiers(); + FirstSubmoduleID = NUM_PREDEF_SUBMODULE_IDS + Chain->getTotalNumSubmodules(); + FirstSelectorID = NUM_PREDEF_SELECTOR_IDS + Chain->getTotalNumSelectors(); + NextDeclID = FirstDeclID; + NextTypeID = FirstTypeID; + NextIdentID = FirstIdentID; + NextSelectorID = FirstSelectorID; + NextSubmoduleID = FirstSubmoduleID; +} + +void ASTWriter::IdentifierRead(IdentID ID, IdentifierInfo *II) { + IdentifierIDs[II] = ID; + if (II->hasMacroDefinition()) + DeserializedMacroNames.push_back(II); +} + +void ASTWriter::TypeRead(TypeIdx Idx, QualType T) { + // Always take the highest-numbered type index. This copes with an interesting + // case for chained AST writing where we schedule writing the type and then, + // later, deserialize the type from another AST. In this case, we want to + // keep the higher-numbered entry so that we can properly write it out to + // the AST file. + TypeIdx &StoredIdx = TypeIdxs[T]; + if (Idx.getIndex() >= StoredIdx.getIndex()) + StoredIdx = Idx; +} + +void ASTWriter::SelectorRead(SelectorID ID, Selector S) { + SelectorIDs[S] = ID; +} + +void ASTWriter::MacroDefinitionRead(serialization::PreprocessedEntityID ID, + MacroDefinition *MD) { + assert(MacroDefinitions.find(MD) == MacroDefinitions.end()); + MacroDefinitions[MD] = ID; +} + +void ASTWriter::MacroVisible(IdentifierInfo *II) { + DeserializedMacroNames.push_back(II); +} + +void ASTWriter::ModuleRead(serialization::SubmoduleID ID, Module *Mod) { + assert(SubmoduleIDs.find(Mod) == SubmoduleIDs.end()); + SubmoduleIDs[Mod] = ID; +} + +void ASTWriter::CompletedTagDefinition(const TagDecl *D) { + assert(D->isCompleteDefinition()); + assert(!WritingAST && "Already writing the AST!"); + if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) { + // We are interested when a PCH decl is modified. + if (RD->isFromASTFile()) { + // A forward reference was mutated into a definition. Rewrite it. + // FIXME: This happens during template instantiation, should we + // have created a new definition decl instead ? + RewriteDecl(RD); + } + } +} +void ASTWriter::AddedVisibleDecl(const DeclContext *DC, const Decl *D) { + assert(!WritingAST && "Already writing the AST!"); + + // TU and namespaces are handled elsewhere. + if (isa<TranslationUnitDecl>(DC) || isa<NamespaceDecl>(DC)) + return; + + if (!(!D->isFromASTFile() && cast<Decl>(DC)->isFromASTFile())) + return; // Not a source decl added to a DeclContext from PCH. + + AddUpdatedDeclContext(DC); +} + +void ASTWriter::AddedCXXImplicitMember(const CXXRecordDecl *RD, const Decl *D) { + assert(!WritingAST && "Already writing the AST!"); + assert(D->isImplicit()); + if (!(!D->isFromASTFile() && RD->isFromASTFile())) + return; // Not a source member added to a class from PCH. + if (!isa<CXXMethodDecl>(D)) + return; // We are interested in lazily declared implicit methods. + + // A decl coming from PCH was modified. + assert(RD->isCompleteDefinition()); + UpdateRecord &Record = DeclUpdates[RD]; + Record.push_back(UPD_CXX_ADDED_IMPLICIT_MEMBER); + Record.push_back(reinterpret_cast<uint64_t>(D)); +} + +void ASTWriter::AddedCXXTemplateSpecialization(const ClassTemplateDecl *TD, + const ClassTemplateSpecializationDecl *D) { + // The specializations set is kept in the canonical template. + assert(!WritingAST && "Already writing the AST!"); + TD = TD->getCanonicalDecl(); + if (!(!D->isFromASTFile() && TD->isFromASTFile())) + return; // Not a source specialization added to a template from PCH. + + UpdateRecord &Record = DeclUpdates[TD]; + Record.push_back(UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION); + Record.push_back(reinterpret_cast<uint64_t>(D)); +} + +void ASTWriter::AddedCXXTemplateSpecialization(const FunctionTemplateDecl *TD, + const FunctionDecl *D) { + // The specializations set is kept in the canonical template. + assert(!WritingAST && "Already writing the AST!"); + TD = TD->getCanonicalDecl(); + if (!(!D->isFromASTFile() && TD->isFromASTFile())) + return; // Not a source specialization added to a template from PCH. + + UpdateRecord &Record = DeclUpdates[TD]; + Record.push_back(UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION); + Record.push_back(reinterpret_cast<uint64_t>(D)); +} + +void ASTWriter::CompletedImplicitDefinition(const FunctionDecl *D) { + assert(!WritingAST && "Already writing the AST!"); + if (!D->isFromASTFile()) + return; // Declaration not imported from PCH. + + // Implicit decl from a PCH was defined. + // FIXME: Should implicit definition be a separate FunctionDecl? + RewriteDecl(D); +} + +void ASTWriter::StaticDataMemberInstantiated(const VarDecl *D) { + assert(!WritingAST && "Already writing the AST!"); + if (!D->isFromASTFile()) + return; + + // Since the actual instantiation is delayed, this really means that we need + // to update the instantiation location. + UpdateRecord &Record = DeclUpdates[D]; + Record.push_back(UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER); + AddSourceLocation( + D->getMemberSpecializationInfo()->getPointOfInstantiation(), Record); +} + +void ASTWriter::AddedObjCCategoryToInterface(const ObjCCategoryDecl *CatD, + const ObjCInterfaceDecl *IFD) { + assert(!WritingAST && "Already writing the AST!"); + if (!IFD->isFromASTFile()) + return; // Declaration not imported from PCH. + + assert(IFD->getDefinition() && "Category on a class without a definition?"); + ObjCClassesWithCategories.insert( + const_cast<ObjCInterfaceDecl *>(IFD->getDefinition())); +} + + +void ASTWriter::AddedObjCPropertyInClassExtension(const ObjCPropertyDecl *Prop, + const ObjCPropertyDecl *OrigProp, + const ObjCCategoryDecl *ClassExt) { + const ObjCInterfaceDecl *D = ClassExt->getClassInterface(); + if (!D) + return; + + assert(!WritingAST && "Already writing the AST!"); + if (!D->isFromASTFile()) + return; // Declaration not imported from PCH. + + RewriteDecl(D); +} |