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//===--- ASTWriter.cpp - AST File Writer ------------------------*- C++ -*-===//
//
// 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 "ASTReaderInternals.h"
#include "MultiOnDiskHashTable.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTUnresolvedSet.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclContextInternals.h"
#include "clang/AST/DeclFriend.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/LambdaCapture.h"
#include "clang/AST/NestedNameSpecifier.h"
#include "clang/AST/RawCommentList.h"
#include "clang/AST/TemplateName.h"
#include "clang/AST/Type.h"
#include "clang/AST/TypeLocVisitor.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/FileSystemOptions.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/MemoryBufferCache.h"
#include "clang/Basic/Module.h"
#include "clang/Basic/ObjCRuntime.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/SourceManagerInternals.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/TargetOptions.h"
#include "clang/Basic/Version.h"
#include "clang/Basic/VersionTuple.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Lex/HeaderSearchOptions.h"
#include "clang/Lex/MacroInfo.h"
#include "clang/Lex/ModuleMap.h"
#include "clang/Lex/PreprocessingRecord.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/PreprocessorOptions.h"
#include "clang/Lex/Token.h"
#include "clang/Sema/IdentifierResolver.h"
#include "clang/Sema/ObjCMethodList.h"
#include "clang/Sema/Sema.h"
#include "clang/Sema/Weak.h"
#include "clang/Serialization/ASTReader.h"
#include "clang/Serialization/Module.h"
#include "clang/Serialization/ModuleFileExtension.h"
#include "clang/Serialization/SerializationDiagnostic.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Bitcode/BitCodes.h"
#include "llvm/Bitcode/BitstreamWriter.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Compression.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/OnDiskHashTable.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/SHA1.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <deque>
#include <limits>
#include <new>
#include <tuple>
#include <utility>
using namespace clang;
using namespace clang::serialization;
template <typename T, typename Allocator>
static StringRef bytes(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 bytes(const SmallVectorImpl<T> &v) {
return StringRef(reinterpret_cast<const char*>(v.data()),
sizeof(T) * v.size());
}
//===----------------------------------------------------------------------===//
// Type serialization
//===----------------------------------------------------------------------===//
namespace clang {
class ASTTypeWriter {
ASTWriter &Writer;
ASTRecordWriter Record;
/// \brief Type code that corresponds to the record generated.
TypeCode Code;
/// \brief Abbreviation to use for the record, if any.
unsigned AbbrevToUse;
public:
ASTTypeWriter(ASTWriter &Writer, ASTWriter::RecordDataImpl &Record)
: Writer(Writer), Record(Writer, Record), Code((TypeCode)0), AbbrevToUse(0) { }
uint64_t Emit() {
return Record.Emit(Code, AbbrevToUse);
}
void Visit(QualType T) {
if (T.hasLocalNonFastQualifiers()) {
Qualifiers Qs = T.getLocalQualifiers();
Record.AddTypeRef(T.getLocalUnqualifiedType());
Record.push_back(Qs.getAsOpaqueValue());
Code = TYPE_EXT_QUAL;
AbbrevToUse = Writer.TypeExtQualAbbrev;
} else {
switch (T->getTypeClass()) {
// For all of the concrete, non-dependent types, call the
// appropriate visitor function.
#define TYPE(Class, Base) \
case Type::Class: Visit##Class##Type(cast<Class##Type>(T)); break;
#define ABSTRACT_TYPE(Class, Base)
#include "clang/AST/TypeNodes.def"
}
}
}
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"
};
} // end namespace clang
void ASTTypeWriter::VisitBuiltinType(const BuiltinType *T) {
llvm_unreachable("Built-in types are never serialized");
}
void ASTTypeWriter::VisitComplexType(const ComplexType *T) {
Record.AddTypeRef(T->getElementType());
Code = TYPE_COMPLEX;
}
void ASTTypeWriter::VisitPointerType(const PointerType *T) {
Record.AddTypeRef(T->getPointeeType());
Code = TYPE_POINTER;
}
void ASTTypeWriter::VisitDecayedType(const DecayedType *T) {
Record.AddTypeRef(T->getOriginalType());
Code = TYPE_DECAYED;
}
void ASTTypeWriter::VisitAdjustedType(const AdjustedType *T) {
Record.AddTypeRef(T->getOriginalType());
Record.AddTypeRef(T->getAdjustedType());
Code = TYPE_ADJUSTED;
}
void ASTTypeWriter::VisitBlockPointerType(const BlockPointerType *T) {
Record.AddTypeRef(T->getPointeeType());
Code = TYPE_BLOCK_POINTER;
}
void ASTTypeWriter::VisitLValueReferenceType(const LValueReferenceType *T) {
Record.AddTypeRef(T->getPointeeTypeAsWritten());
Record.push_back(T->isSpelledAsLValue());
Code = TYPE_LVALUE_REFERENCE;
}
void ASTTypeWriter::VisitRValueReferenceType(const RValueReferenceType *T) {
Record.AddTypeRef(T->getPointeeTypeAsWritten());
Code = TYPE_RVALUE_REFERENCE;
}
void ASTTypeWriter::VisitMemberPointerType(const MemberPointerType *T) {
Record.AddTypeRef(T->getPointeeType());
Record.AddTypeRef(QualType(T->getClass(), 0));
Code = TYPE_MEMBER_POINTER;
}
void ASTTypeWriter::VisitArrayType(const ArrayType *T) {
Record.AddTypeRef(T->getElementType());
Record.push_back(T->getSizeModifier()); // FIXME: stable values
Record.push_back(T->getIndexTypeCVRQualifiers()); // FIXME: stable values
}
void ASTTypeWriter::VisitConstantArrayType(const ConstantArrayType *T) {
VisitArrayType(T);
Record.AddAPInt(T->getSize());
Code = TYPE_CONSTANT_ARRAY;
}
void ASTTypeWriter::VisitIncompleteArrayType(const IncompleteArrayType *T) {
VisitArrayType(T);
Code = TYPE_INCOMPLETE_ARRAY;
}
void ASTTypeWriter::VisitVariableArrayType(const VariableArrayType *T) {
VisitArrayType(T);
Record.AddSourceLocation(T->getLBracketLoc());
Record.AddSourceLocation(T->getRBracketLoc());
Record.AddStmt(T->getSizeExpr());
Code = TYPE_VARIABLE_ARRAY;
}
void ASTTypeWriter::VisitVectorType(const VectorType *T) {
Record.AddTypeRef(T->getElementType());
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) {
Record.AddTypeRef(T->getReturnType());
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());
Record.push_back(C.getNoCallerSavedRegs());
if (C.getHasRegParm() || C.getRegParm() || C.getProducesResult())
AbbrevToUse = 0;
}
void ASTTypeWriter::VisitFunctionNoProtoType(const FunctionNoProtoType *T) {
VisitFunctionType(T);
Code = TYPE_FUNCTION_NO_PROTO;
}
static void addExceptionSpec(const FunctionProtoType *T,
ASTRecordWriter &Record) {
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)
Record.AddTypeRef(T->getExceptionType(I));
} else if (T->getExceptionSpecType() == EST_ComputedNoexcept) {
Record.AddStmt(T->getNoexceptExpr());
} else if (T->getExceptionSpecType() == EST_Uninstantiated) {
Record.AddDeclRef(T->getExceptionSpecDecl());
Record.AddDeclRef(T->getExceptionSpecTemplate());
} else if (T->getExceptionSpecType() == EST_Unevaluated) {
Record.AddDeclRef(T->getExceptionSpecDecl());
}
}
void ASTTypeWriter::VisitFunctionProtoType(const FunctionProtoType *T) {
VisitFunctionType(T);
Record.push_back(T->isVariadic());
Record.push_back(T->hasTrailingReturn());
Record.push_back(T->getTypeQuals());
Record.push_back(static_cast<unsigned>(T->getRefQualifier()));
addExceptionSpec(T, Record);
Record.push_back(T->getNumParams());
for (unsigned I = 0, N = T->getNumParams(); I != N; ++I)
Record.AddTypeRef(T->getParamType(I));
if (T->hasExtParameterInfos()) {
for (unsigned I = 0, N = T->getNumParams(); I != N; ++I)
Record.push_back(T->getExtParameterInfo(I).getOpaqueValue());
}
if (T->isVariadic() || T->hasTrailingReturn() || T->getTypeQuals() ||
T->getRefQualifier() || T->getExceptionSpecType() != EST_None ||
T->hasExtParameterInfos())
AbbrevToUse = 0;
Code = TYPE_FUNCTION_PROTO;
}
void ASTTypeWriter::VisitUnresolvedUsingType(const UnresolvedUsingType *T) {
Record.AddDeclRef(T->getDecl());
Code = TYPE_UNRESOLVED_USING;
}
void ASTTypeWriter::VisitTypedefType(const TypedefType *T) {
Record.AddDeclRef(T->getDecl());
assert(!T->isCanonicalUnqualified() && "Invalid typedef ?");
Record.AddTypeRef(T->getCanonicalTypeInternal());
Code = TYPE_TYPEDEF;
}
void ASTTypeWriter::VisitTypeOfExprType(const TypeOfExprType *T) {
Record.AddStmt(T->getUnderlyingExpr());
Code = TYPE_TYPEOF_EXPR;
}
void ASTTypeWriter::VisitTypeOfType(const TypeOfType *T) {
Record.AddTypeRef(T->getUnderlyingType());
Code = TYPE_TYPEOF;
}
void ASTTypeWriter::VisitDecltypeType(const DecltypeType *T) {
Record.AddTypeRef(T->getUnderlyingType());
Record.AddStmt(T->getUnderlyingExpr());
Code = TYPE_DECLTYPE;
}
void ASTTypeWriter::VisitUnaryTransformType(const UnaryTransformType *T) {
Record.AddTypeRef(T->getBaseType());
Record.AddTypeRef(T->getUnderlyingType());
Record.push_back(T->getUTTKind());
Code = TYPE_UNARY_TRANSFORM;
}
void ASTTypeWriter::VisitAutoType(const AutoType *T) {
Record.AddTypeRef(T->getDeducedType());
Record.push_back((unsigned)T->getKeyword());
if (T->getDeducedType().isNull())
Record.push_back(T->isDependentType());
Code = TYPE_AUTO;
}
void ASTTypeWriter::VisitDeducedTemplateSpecializationType(
const DeducedTemplateSpecializationType *T) {
Record.AddTemplateName(T->getTemplateName());
Record.AddTypeRef(T->getDeducedType());
if (T->getDeducedType().isNull())
Record.push_back(T->isDependentType());
Code = TYPE_DEDUCED_TEMPLATE_SPECIALIZATION;
}
void ASTTypeWriter::VisitTagType(const TagType *T) {
Record.push_back(T->isDependentType());
Record.AddDeclRef(T->getDecl()->getCanonicalDecl());
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) {
Record.AddTypeRef(T->getModifiedType());
Record.AddTypeRef(T->getEquivalentType());
Record.push_back(T->getAttrKind());
Code = TYPE_ATTRIBUTED;
}
void
ASTTypeWriter::VisitSubstTemplateTypeParmType(
const SubstTemplateTypeParmType *T) {
Record.AddTypeRef(QualType(T->getReplacedParameter(), 0));
Record.AddTypeRef(T->getReplacementType());
Code = TYPE_SUBST_TEMPLATE_TYPE_PARM;
}
void
ASTTypeWriter::VisitSubstTemplateTypeParmPackType(
const SubstTemplateTypeParmPackType *T) {
Record.AddTypeRef(QualType(T->getReplacedParameter(), 0));
Record.AddTemplateArgument(T->getArgumentPack());
Code = TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK;
}
void
ASTTypeWriter::VisitTemplateSpecializationType(
const TemplateSpecializationType *T) {
Record.push_back(T->isDependentType());
Record.AddTemplateName(T->getTemplateName());
Record.push_back(T->getNumArgs());
for (const auto &ArgI : *T)
Record.AddTemplateArgument(ArgI);
Record.AddTypeRef(T->isTypeAlias() ? T->getAliasedType()
: T->isCanonicalUnqualified()
? QualType()
: T->getCanonicalTypeInternal());
Code = TYPE_TEMPLATE_SPECIALIZATION;
}
void
ASTTypeWriter::VisitDependentSizedArrayType(const DependentSizedArrayType *T) {
VisitArrayType(T);
Record.AddStmt(T->getSizeExpr());
Record.AddSourceRange(T->getBracketsRange());
Code = TYPE_DEPENDENT_SIZED_ARRAY;
}
void
ASTTypeWriter::VisitDependentSizedExtVectorType(
const DependentSizedExtVectorType *T) {
Record.AddTypeRef(T->getElementType());
Record.AddStmt(T->getSizeExpr());
Record.AddSourceLocation(T->getAttributeLoc());
Code = TYPE_DEPENDENT_SIZED_EXT_VECTOR;
}
void
ASTTypeWriter::VisitTemplateTypeParmType(const TemplateTypeParmType *T) {
Record.push_back(T->getDepth());
Record.push_back(T->getIndex());
Record.push_back(T->isParameterPack());
Record.AddDeclRef(T->getDecl());
Code = TYPE_TEMPLATE_TYPE_PARM;
}
void
ASTTypeWriter::VisitDependentNameType(const DependentNameType *T) {
Record.push_back(T->getKeyword());
Record.AddNestedNameSpecifier(T->getQualifier());
Record.AddIdentifierRef(T->getIdentifier());
Record.AddTypeRef(
T->isCanonicalUnqualified() ? QualType() : T->getCanonicalTypeInternal());
Code = TYPE_DEPENDENT_NAME;
}
void
ASTTypeWriter::VisitDependentTemplateSpecializationType(
const DependentTemplateSpecializationType *T) {
Record.push_back(T->getKeyword());
Record.AddNestedNameSpecifier(T->getQualifier());
Record.AddIdentifierRef(T->getIdentifier());
Record.push_back(T->getNumArgs());
for (const auto &I : *T)
Record.AddTemplateArgument(I);
Code = TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION;
}
void ASTTypeWriter::VisitPackExpansionType(const PackExpansionType *T) {
Record.AddTypeRef(T->getPattern());
if (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) {
Record.AddTypeRef(T->getInnerType());
Code = TYPE_PAREN;
}
void ASTTypeWriter::VisitElaboratedType(const ElaboratedType *T) {
Record.push_back(T->getKeyword());
Record.AddNestedNameSpecifier(T->getQualifier());
Record.AddTypeRef(T->getNamedType());
Code = TYPE_ELABORATED;
}
void ASTTypeWriter::VisitInjectedClassNameType(const InjectedClassNameType *T) {
Record.AddDeclRef(T->getDecl()->getCanonicalDecl());
Record.AddTypeRef(T->getInjectedSpecializationType());
Code = TYPE_INJECTED_CLASS_NAME;
}
void ASTTypeWriter::VisitObjCInterfaceType(const ObjCInterfaceType *T) {
Record.AddDeclRef(T->getDecl()->getCanonicalDecl());
Code = TYPE_OBJC_INTERFACE;
}
void ASTTypeWriter::VisitObjCTypeParamType(const ObjCTypeParamType *T) {
Record.AddDeclRef(T->getDecl());
Record.push_back(T->getNumProtocols());
for (const auto *I : T->quals())
Record.AddDeclRef(I);
Code = TYPE_OBJC_TYPE_PARAM;
}
void ASTTypeWriter::VisitObjCObjectType(const ObjCObjectType *T) {
Record.AddTypeRef(T->getBaseType());
Record.push_back(T->getTypeArgsAsWritten().size());
for (auto TypeArg : T->getTypeArgsAsWritten())
Record.AddTypeRef(TypeArg);
Record.push_back(T->getNumProtocols());
for (const auto *I : T->quals())
Record.AddDeclRef(I);
Record.push_back(T->isKindOfTypeAsWritten());
Code = TYPE_OBJC_OBJECT;
}
void
ASTTypeWriter::VisitObjCObjectPointerType(const ObjCObjectPointerType *T) {
Record.AddTypeRef(T->getPointeeType());
Code = TYPE_OBJC_OBJECT_POINTER;
}
void
ASTTypeWriter::VisitAtomicType(const AtomicType *T) {
Record.AddTypeRef(T->getValueType());
Code = TYPE_ATOMIC;
}
void
ASTTypeWriter::VisitPipeType(const PipeType *T) {
Record.AddTypeRef(T->getElementType());
Record.push_back(T->isReadOnly());
Code = TYPE_PIPE;
}
namespace {
class TypeLocWriter : public TypeLocVisitor<TypeLocWriter> {
ASTRecordWriter &Record;
public:
TypeLocWriter(ASTRecordWriter &Record)
: 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);
};
} // end anonymous namespace
void TypeLocWriter::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
// nothing to do
}
void TypeLocWriter::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
Record.AddSourceLocation(TL.getBuiltinLoc());
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) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitPointerTypeLoc(PointerTypeLoc TL) {
Record.AddSourceLocation(TL.getStarLoc());
}
void TypeLocWriter::VisitDecayedTypeLoc(DecayedTypeLoc TL) {
// nothing to do
}
void TypeLocWriter::VisitAdjustedTypeLoc(AdjustedTypeLoc TL) {
// nothing to do
}
void TypeLocWriter::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
Record.AddSourceLocation(TL.getCaretLoc());
}
void TypeLocWriter::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
Record.AddSourceLocation(TL.getAmpLoc());
}
void TypeLocWriter::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
Record.AddSourceLocation(TL.getAmpAmpLoc());
}
void TypeLocWriter::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
Record.AddSourceLocation(TL.getStarLoc());
Record.AddTypeSourceInfo(TL.getClassTInfo());
}
void TypeLocWriter::VisitArrayTypeLoc(ArrayTypeLoc TL) {
Record.AddSourceLocation(TL.getLBracketLoc());
Record.AddSourceLocation(TL.getRBracketLoc());
Record.push_back(TL.getSizeExpr() ? 1 : 0);
if (TL.getSizeExpr())
Record.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) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitVectorTypeLoc(VectorTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitFunctionTypeLoc(FunctionTypeLoc TL) {
Record.AddSourceLocation(TL.getLocalRangeBegin());
Record.AddSourceLocation(TL.getLParenLoc());
Record.AddSourceLocation(TL.getRParenLoc());
Record.AddSourceRange(TL.getExceptionSpecRange());
Record.AddSourceLocation(TL.getLocalRangeEnd());
for (unsigned i = 0, e = TL.getNumParams(); i != e; ++i)
Record.AddDeclRef(TL.getParam(i));
}
void TypeLocWriter::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) {
VisitFunctionTypeLoc(TL);
}
void TypeLocWriter::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) {
VisitFunctionTypeLoc(TL);
}
void TypeLocWriter::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitObjCTypeParamTypeLoc(ObjCTypeParamTypeLoc TL) {
if (TL.getNumProtocols()) {
Record.AddSourceLocation(TL.getProtocolLAngleLoc());
Record.AddSourceLocation(TL.getProtocolRAngleLoc());
}
for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
Record.AddSourceLocation(TL.getProtocolLoc(i));
}
void TypeLocWriter::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
Record.AddSourceLocation(TL.getTypeofLoc());
Record.AddSourceLocation(TL.getLParenLoc());
Record.AddSourceLocation(TL.getRParenLoc());
}
void TypeLocWriter::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
Record.AddSourceLocation(TL.getTypeofLoc());
Record.AddSourceLocation(TL.getLParenLoc());
Record.AddSourceLocation(TL.getRParenLoc());
Record.AddTypeSourceInfo(TL.getUnderlyingTInfo());
}
void TypeLocWriter::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) {
Record.AddSourceLocation(TL.getKWLoc());
Record.AddSourceLocation(TL.getLParenLoc());
Record.AddSourceLocation(TL.getRParenLoc());
Record.AddTypeSourceInfo(TL.getUnderlyingTInfo());
}
void TypeLocWriter::VisitAutoTypeLoc(AutoTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitDeducedTemplateSpecializationTypeLoc(
DeducedTemplateSpecializationTypeLoc TL) {
Record.AddSourceLocation(TL.getTemplateNameLoc());
}
void TypeLocWriter::VisitRecordTypeLoc(RecordTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitEnumTypeLoc(EnumTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitAttributedTypeLoc(AttributedTypeLoc TL) {
Record.AddSourceLocation(TL.getAttrNameLoc());
if (TL.hasAttrOperand()) {
SourceRange range = TL.getAttrOperandParensRange();
Record.AddSourceLocation(range.getBegin());
Record.AddSourceLocation(range.getEnd());
}
if (TL.hasAttrExprOperand()) {
Expr *operand = TL.getAttrExprOperand();
Record.push_back(operand ? 1 : 0);
if (operand) Record.AddStmt(operand);
} else if (TL.hasAttrEnumOperand()) {
Record.AddSourceLocation(TL.getAttrEnumOperandLoc());
}
}
void TypeLocWriter::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitSubstTemplateTypeParmTypeLoc(
SubstTemplateTypeParmTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitSubstTemplateTypeParmPackTypeLoc(
SubstTemplateTypeParmPackTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitTemplateSpecializationTypeLoc(
TemplateSpecializationTypeLoc TL) {
Record.AddSourceLocation(TL.getTemplateKeywordLoc());
Record.AddSourceLocation(TL.getTemplateNameLoc());
Record.AddSourceLocation(TL.getLAngleLoc());
Record.AddSourceLocation(TL.getRAngleLoc());
for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
Record.AddTemplateArgumentLocInfo(TL.getArgLoc(i).getArgument().getKind(),
TL.getArgLoc(i).getLocInfo());
}
void TypeLocWriter::VisitParenTypeLoc(ParenTypeLoc TL) {
Record.AddSourceLocation(TL.getLParenLoc());
Record.AddSourceLocation(TL.getRParenLoc());
}
void TypeLocWriter::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
Record.AddSourceLocation(TL.getElaboratedKeywordLoc());
Record.AddNestedNameSpecifierLoc(TL.getQualifierLoc());
}
void TypeLocWriter::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
Record.AddSourceLocation(TL.getElaboratedKeywordLoc());
Record.AddNestedNameSpecifierLoc(TL.getQualifierLoc());
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitDependentTemplateSpecializationTypeLoc(
DependentTemplateSpecializationTypeLoc TL) {
Record.AddSourceLocation(TL.getElaboratedKeywordLoc());
Record.AddNestedNameSpecifierLoc(TL.getQualifierLoc());
Record.AddSourceLocation(TL.getTemplateKeywordLoc());
Record.AddSourceLocation(TL.getTemplateNameLoc());
Record.AddSourceLocation(TL.getLAngleLoc());
Record.AddSourceLocation(TL.getRAngleLoc());
for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I)
Record.AddTemplateArgumentLocInfo(TL.getArgLoc(I).getArgument().getKind(),
TL.getArgLoc(I).getLocInfo());
}
void TypeLocWriter::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) {
Record.AddSourceLocation(TL.getEllipsisLoc());
}
void TypeLocWriter::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
Record.AddSourceLocation(TL.getNameLoc());
}
void TypeLocWriter::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
Record.push_back(TL.hasBaseTypeAsWritten());
Record.AddSourceLocation(TL.getTypeArgsLAngleLoc());
Record.AddSourceLocation(TL.getTypeArgsRAngleLoc());
for (unsigned i = 0, e = TL.getNumTypeArgs(); i != e; ++i)
Record.AddTypeSourceInfo(TL.getTypeArgTInfo(i));
Record.AddSourceLocation(TL.getProtocolLAngleLoc());
Record.AddSourceLocation(TL.getProtocolRAngleLoc());
for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
Record.AddSourceLocation(TL.getProtocolLoc(i));
}
void TypeLocWriter::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
Record.AddSourceLocation(TL.getStarLoc());
}
void TypeLocWriter::VisitAtomicTypeLoc(AtomicTypeLoc TL) {
Record.AddSourceLocation(TL.getKWLoc());
Record.AddSourceLocation(TL.getLParenLoc());
Record.AddSourceLocation(TL.getRParenLoc());
}
void TypeLocWriter::VisitPipeTypeLoc(PipeTypeLoc TL) {
Record.AddSourceLocation(TL.getKWLoc());
}
void ASTWriter::WriteTypeAbbrevs() {
using namespace llvm;
std::shared_ptr<BitCodeAbbrev> Abv;
// Abbreviation for TYPE_EXT_QUAL
Abv = std::make_shared<BitCodeAbbrev>();
Abv->Add(BitCodeAbbrevOp(serialization::TYPE_EXT_QUAL));
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 3)); // Quals
TypeExtQualAbbrev = Stream.EmitAbbrev(std::move(Abv));
// Abbreviation for TYPE_FUNCTION_PROTO
Abv = std::make_shared<BitCodeAbbrev>();
Abv->Add(BitCodeAbbrevOp(serialization::TYPE_FUNCTION_PROTO));
// FunctionType
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ReturnType
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // NoReturn
Abv->Add(BitCodeAbbrevOp(0)); // HasRegParm
Abv->Add(BitCodeAbbrevOp(0)); // RegParm
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // CC
Abv->Add(BitCodeAbbrevOp(0)); // ProducesResult
Abv->Add(BitCodeAbbrevOp(0)); // NoCallerSavedRegs
// FunctionProtoType
Abv->Add(BitCodeAbbrevOp(0)); // IsVariadic
Abv->Add(BitCodeAbbrevOp(0)); // HasTrailingReturn
Abv->Add(BitCodeAbbrevOp(0)); // TypeQuals
Abv->Add(BitCodeAbbrevOp(0)); // RefQualifier
Abv->Add(BitCodeAbbrevOp(EST_None)); // ExceptionSpec
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // NumParams
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Params
TypeFunctionProtoAbbrev = Stream.EmitAbbrev(std::move(Abv));
}
//===----------------------------------------------------------------------===//
// 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 || 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_REF_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_GCCASM);
RECORD(STMT_MSASM);
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_PAREN_LIST);
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_DESIGNATED_INIT_UPDATE);
RECORD(EXPR_IMPLICIT_VALUE_INIT);
RECORD(EXPR_NO_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_BOXED_EXPRESSION);
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(STMT_CXX_CATCH);
RECORD(STMT_CXX_TRY);
RECORD(STMT_CXX_FOR_RANGE);
RECORD(EXPR_CXX_OPERATOR_CALL);
RECORD(EXPR_CXX_MEMBER_CALL);
RECORD(EXPR_CXX_CONSTRUCT);
RECORD(EXPR_CXX_TEMPORARY_OBJECT);
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_STD_INITIALIZER_LIST);
RECORD(EXPR_CXX_BOOL_LITERAL);
RECORD(EXPR_CXX_NULL_PTR_LITERAL);
RECORD(EXPR_CXX_TYPEID_EXPR);
RECORD(EXPR_CXX_TYPEID_TYPE);
RECORD(EXPR_CXX_THIS);
RECORD(EXPR_CXX_THROW);
RECORD(EXPR_CXX_DEFAULT_ARG);
RECORD(EXPR_CXX_DEFAULT_INIT);
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_EXPRESSION_TRAIT);
RECORD(EXPR_CXX_NOEXCEPT);
RECORD(EXPR_OPAQUE_VALUE);
RECORD(EXPR_BINARY_CONDITIONAL_OPERATOR);
RECORD(EXPR_TYPE_TRAIT);
RECORD(EXPR_ARRAY_TYPE_TRAIT);
RECORD(EXPR_PACK_EXPANSION);
RECORD(EXPR_SIZEOF_PACK);
RECORD(EXPR_SUBST_NON_TYPE_TEMPLATE_PARM);
RECORD(EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK);
RECORD(EXPR_FUNCTION_PARM_PACK);
RECORD(EXPR_MATERIALIZE_TEMPORARY);
RECORD(EXPR_CUDA_KERNEL_CALL);
RECORD(EXPR_CXX_UUIDOF_EXPR);
RECORD(EXPR_CXX_UUIDOF_TYPE);
RECORD(EXPR_LAMBDA);
#undef RECORD
}
void ASTWriter::WriteBlockInfoBlock() {
RecordData Record;
Stream.EnterBlockInfoBlock();
#define BLOCK(X) EmitBlockID(X ## _ID, #X, Stream, Record)
#define RECORD(X) EmitRecordID(X, #X, Stream, Record)
// Control Block.
BLOCK(CONTROL_BLOCK);
RECORD(METADATA);
RECORD(MODULE_NAME);
RECORD(MODULE_DIRECTORY);
RECORD(MODULE_MAP_FILE);
RECORD(IMPORTS);
RECORD(ORIGINAL_FILE);
RECORD(ORIGINAL_PCH_DIR);
RECORD(ORIGINAL_FILE_ID);
RECORD(INPUT_FILE_OFFSETS);
BLOCK(OPTIONS_BLOCK);
RECORD(LANGUAGE_OPTIONS);
RECORD(TARGET_OPTIONS);
RECORD(FILE_SYSTEM_OPTIONS);
RECORD(HEADER_SEARCH_OPTIONS);
RECORD(PREPROCESSOR_OPTIONS);
BLOCK(INPUT_FILES_BLOCK);
RECORD(INPUT_FILE);
// AST Top-Level Block.
BLOCK(AST_BLOCK);
RECORD(TYPE_OFFSET);
RECORD(DECL_OFFSET);
RECORD(IDENTIFIER_OFFSET);
RECORD(IDENTIFIER_TABLE);
RECORD(EAGERLY_DESERIALIZED_DECLS);
RECORD(MODULAR_CODEGEN_DECLS);
RECORD(SPECIAL_TYPES);
RECORD(STATISTICS);
RECORD(TENTATIVE_DEFINITIONS);
RECORD(SELECTOR_OFFSETS);
RECORD(METHOD_POOL);
RECORD(PP_COUNTER_VALUE);
RECORD(SOURCE_LOCATION_OFFSETS);
RECORD(SOURCE_LOCATION_PRELOADS);
RECORD(EXT_VECTOR_DECLS);
RECORD(UNUSED_FILESCOPED_DECLS);
RECORD(PPD_ENTITIES_OFFSETS);
RECORD(VTABLE_USES);
RECORD(REFERENCED_SELECTOR_POOL);
RECORD(TU_UPDATE_LEXICAL);
RECORD(SEMA_DECL_REFS);
RECORD(WEAK_UNDECLARED_IDENTIFIERS);
RECORD(PENDING_IMPLICIT_INSTANTIATIONS);
RECORD(UPDATE_VISIBLE);
RECORD(DECL_UPDATE_OFFSETS);
RECORD(DECL_UPDATES);
RECORD(CUDA_SPECIAL_DECL_REFS);
RECORD(HEADER_SEARCH_TABLE);
RECORD(FP_PRAGMA_OPTIONS);
RECORD(OPENCL_EXTENSIONS);
RECORD(OPENCL_EXTENSION_TYPES);
RECORD(OPENCL_EXTENSION_DECLS);
RECORD(DELEGATING_CTORS);
RECORD(KNOWN_NAMESPACES);
RECORD(MODULE_OFFSET_MAP);
RECORD(SOURCE_MANAGER_LINE_TABLE);
RECORD(OBJC_CATEGORIES_MAP);
RECORD(FILE_SORTED_DECLS);
RECORD(IMPORTED_MODULES);
RECORD(OBJC_CATEGORIES);
RECORD(MACRO_OFFSET);
RECORD(INTERESTING_IDENTIFIERS);
RECORD(UNDEFINED_BUT_USED);
RECORD(LATE_PARSED_TEMPLATE);
RECORD(OPTIMIZE_PRAGMA_OPTIONS);
RECORD(MSSTRUCT_PRAGMA_OPTIONS);
RECORD(POINTERS_TO_MEMBERS_PRAGMA_OPTIONS);
RECORD(UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES);
RECORD(DELETE_EXPRS_TO_ANALYZE);
RECORD(CUDA_PRAGMA_FORCE_HOST_DEVICE_DEPTH);
RECORD(PP_CONDITIONAL_STACK);
// SourceManager Block.
BLOCK(SOURCE_MANAGER_BLOCK);
RECORD(SM_SLOC_FILE_ENTRY);
RECORD(SM_SLOC_BUFFER_ENTRY);
RECORD(SM_SLOC_BUFFER_BLOB);
RECORD(SM_SLOC_BUFFER_BLOB_COMPRESSED);
RECORD(SM_SLOC_EXPANSION_ENTRY);
// Preprocessor Block.
BLOCK(PREPROCESSOR_BLOCK);
RECORD(PP_MACRO_DIRECTIVE_HISTORY);
RECORD(PP_MACRO_FUNCTION_LIKE);
RECORD(PP_MACRO_OBJECT_LIKE);
RECORD(PP_MODULE_MACRO);
RECORD(PP_TOKEN);
// Submodule Block.
BLOCK(SUBMODULE_BLOCK);
RECORD(SUBMODULE_METADATA);
RECORD(SUBMODULE_DEFINITION);
RECORD(SUBMODULE_UMBRELLA_HEADER);
RECORD(SUBMODULE_HEADER);
RECORD(SUBMODULE_TOPHEADER);
RECORD(SUBMODULE_UMBRELLA_DIR);
RECORD(SUBMODULE_IMPORTS);
RECORD(SUBMODULE_EXPORTS);
RECORD(SUBMODULE_REQUIRES);
RECORD(SUBMODULE_EXCLUDED_HEADER);
RECORD(SUBMODULE_LINK_LIBRARY);
RECORD(SUBMODULE_CONFIG_MACRO);
RECORD(SUBMODULE_CONFLICT);
RECORD(SUBMODULE_PRIVATE_HEADER);
RECORD(SUBMODULE_TEXTUAL_HEADER);
RECORD(SUBMODULE_PRIVATE_TEXTUAL_HEADER);
RECORD(SUBMODULE_INITIALIZERS);
RECORD(SUBMODULE_EXPORT_AS);
// Comments Block.
BLOCK(COMMENTS_BLOCK);
RECORD(COMMENTS_RAW_COMMENT);
// 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_NO_PROTO);
RECORD(TYPE_FUNCTION_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_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_AUTO);
RECORD(TYPE_UNARY_TRANSFORM);
RECORD(TYPE_ATOMIC);
RECORD(TYPE_DECAYED);
RECORD(TYPE_ADJUSTED);
RECORD(TYPE_OBJC_TYPE_PARAM);
RECORD(LOCAL_REDECLARATIONS);
RECORD(DECL_TYPEDEF);
RECORD(DECL_TYPEALIAS);
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_MS_PROPERTY);
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_INHERITED_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_VAR_TEMPLATE);
RECORD(DECL_VAR_TEMPLATE_SPECIALIZATION);
RECORD(DECL_VAR_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_TYPE_ALIAS_TEMPLATE);
RECORD(DECL_STATIC_ASSERT);
RECORD(DECL_CXX_BASE_SPECIFIERS);
RECORD(DECL_CXX_CTOR_INITIALIZERS);
RECORD(DECL_INDIRECTFIELD);
RECORD(DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK);
RECORD(DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK);
RECORD(DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION);
RECORD(DECL_IMPORT);
RECORD(DECL_OMP_THREADPRIVATE);
RECORD(DECL_EMPTY);
RECORD(DECL_OBJC_TYPE_PARAM);
RECORD(DECL_OMP_CAPTUREDEXPR);
RECORD(DECL_PRAGMA_COMMENT);
RECORD(DECL_PRAGMA_DETECT_MISMATCH);
RECORD(DECL_OMP_DECLARE_REDUCTION);
// 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);
// Decls and Types block.
BLOCK(EXTENSION_BLOCK);
RECORD(EXTENSION_METADATA);
BLOCK(UNHASHED_CONTROL_BLOCK);
RECORD(SIGNATURE);
RECORD(DIAGNOSTIC_OPTIONS);
RECORD(DIAG_PRAGMA_MAPPINGS);
#undef RECORD
#undef BLOCK
Stream.ExitBlock();
}
/// \brief Prepares a path for being written to an AST file by converting it
/// to an absolute path and removing nested './'s.
///
/// \return \c true if the path was changed.
static bool cleanPathForOutput(FileManager &FileMgr,
SmallVectorImpl<char> &Path) {
bool Changed = FileMgr.makeAbsolutePath(Path);
return Changed | llvm::sys::path::remove_dots(Path);
}
/// \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 BaseDir When non-NULL, the PCH file is a relocatable AST file and
/// the returned filename will be adjusted by this root directory.
///
/// \returns either the original filename (if it needs no adjustment) or the
/// adjusted filename (which points into the @p Filename parameter).
static const char *
adjustFilenameForRelocatableAST(const char *Filename, StringRef BaseDir) {
assert(Filename && "No file name to adjust?");
if (BaseDir.empty())
return Filename;
// Verify that the filename and the system root have the same prefix.
unsigned Pos = 0;
for (; Filename[Pos] && Pos < BaseDir.size(); ++Pos)
if (Filename[Pos] != BaseDir[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 there's not a path separator at the end of the base directory nor
// immediately after it, then this isn't within the base directory.
if (!llvm::sys::path::is_separator(Filename[Pos])) {
if (!llvm::sys::path::is_separator(BaseDir.back()))
return Filename;
} else {
// If the file name has a '/' at the current position, skip over the '/'.
// We distinguish relative paths from absolute paths by the
// absence of '/' at the beginning of relative paths.
//
// FIXME: This is wrong. We distinguish them by asking if the path is
// absolute, which isn't the same thing. And there might be multiple '/'s
// in a row. Use a better mechanism to indicate whether we have emitted an
// absolute or relative path.
++Pos;
}
return Filename + Pos;
}
ASTFileSignature ASTWriter::createSignature(StringRef Bytes) {
// Calculate the hash till start of UNHASHED_CONTROL_BLOCK.
llvm::SHA1 Hasher;
Hasher.update(ArrayRef<uint8_t>(Bytes.bytes_begin(), Bytes.size()));
auto Hash = Hasher.result();
// Convert to an array [5*i32].
ASTFileSignature Signature;
auto LShift = [&](unsigned char Val, unsigned Shift) {
return (uint32_t)Val << Shift;
};
for (int I = 0; I != 5; ++I)
Signature[I] = LShift(Hash[I * 4 + 0], 24) | LShift(Hash[I * 4 + 1], 16) |
LShift(Hash[I * 4 + 2], 8) | LShift(Hash[I * 4 + 3], 0);
return Signature;
}
ASTFileSignature ASTWriter::writeUnhashedControlBlock(Preprocessor &PP,
ASTContext &Context) {
// Flush first to prepare the PCM hash (signature).
Stream.FlushToWord();
auto StartOfUnhashedControl = Stream.GetCurrentBitNo() >> 3;
// Enter the block and prepare to write records.
RecordData Record;
Stream.EnterSubblock(UNHASHED_CONTROL_BLOCK_ID, 5);
// For implicit modules, write the hash of the PCM as its signature.
ASTFileSignature Signature;
if (WritingModule &&
PP.getHeaderSearchInfo().getHeaderSearchOpts().ModulesHashContent) {
Signature = createSignature(StringRef(Buffer.begin(), StartOfUnhashedControl));
Record.append(Signature.begin(), Signature.end());
Stream.EmitRecord(SIGNATURE, Record);
Record.clear();
}
// Diagnostic options.
const auto &Diags = Context.getDiagnostics();
const DiagnosticOptions &DiagOpts = Diags.getDiagnosticOptions();
#define DIAGOPT(Name, Bits, Default) Record.push_back(DiagOpts.Name);
#define ENUM_DIAGOPT(Name, Type, Bits, Default) \
Record.push_back(static_cast<unsigned>(DiagOpts.get##Name()));
#include "clang/Basic/DiagnosticOptions.def"
Record.push_back(DiagOpts.Warnings.size());
for (unsigned I = 0, N = DiagOpts.Warnings.size(); I != N; ++I)
AddString(DiagOpts.Warnings[I], Record);
Record.push_back(DiagOpts.Remarks.size());
for (unsigned I = 0, N = DiagOpts.Remarks.size(); I != N; ++I)
AddString(DiagOpts.Remarks[I], Record);
// Note: we don't serialize the log or serialization file names, because they
// are generally transient files and will almost always be overridden.
Stream.EmitRecord(DIAGNOSTIC_OPTIONS, Record);
// Write out the diagnostic/pragma mappings.
WritePragmaDiagnosticMappings(Diags, /* IsModule = */ WritingModule);
// Leave the options block.
Stream.ExitBlock();
return Signature;
}
/// \brief Write the control block.
void ASTWriter::WriteControlBlock(Preprocessor &PP, ASTContext &Context,
StringRef isysroot,
const std::string &OutputFile) {
using namespace llvm;
Stream.EnterSubblock(CONTROL_BLOCK_ID, 5);
RecordData Record;
// Metadata
auto MetadataAbbrev = std::make_shared<BitCodeAbbrev>();
MetadataAbbrev->Add(BitCodeAbbrevOp(METADATA));
MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Major
MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Minor
MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang maj.
MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang min.
MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Relocatable
MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Timestamps
MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Errors
MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // SVN branch/tag
unsigned MetadataAbbrevCode = Stream.EmitAbbrev(std::move(MetadataAbbrev));
assert((!WritingModule || isysroot.empty()) &&
"writing module as a relocatable PCH?");
{
RecordData::value_type Record[] = {METADATA, VERSION_MAJOR, VERSION_MINOR,
CLANG_VERSION_MAJOR, CLANG_VERSION_MINOR,
!isysroot.empty(), IncludeTimestamps,
ASTHasCompilerErrors};
Stream.EmitRecordWithBlob(MetadataAbbrevCode, Record,
getClangFullRepositoryVersion());
}
if (WritingModule) {
// Module name
auto Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(MODULE_NAME));
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
unsigned AbbrevCode = Stream.EmitAbbrev(std::move(Abbrev));
RecordData::value_type Record[] = {MODULE_NAME};
Stream.EmitRecordWithBlob(AbbrevCode, Record, WritingModule->Name);
}
if (WritingModule && WritingModule->Directory) {
SmallString<128> BaseDir(WritingModule->Directory->getName());
cleanPathForOutput(Context.getSourceManager().getFileManager(), BaseDir);
// If the home of the module is the current working directory, then we
// want to pick up the cwd of the build process loading the module, not
// our cwd, when we load this module.
if (!PP.getHeaderSearchInfo()
.getHeaderSearchOpts()
.ModuleMapFileHomeIsCwd ||
WritingModule->Directory->getName() != StringRef(".")) {
// Module directory.
auto Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(MODULE_DIRECTORY));
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Directory
unsigned AbbrevCode = Stream.EmitAbbrev(std::move(Abbrev));
RecordData::value_type Record[] = {MODULE_DIRECTORY};
Stream.EmitRecordWithBlob(AbbrevCode, Record, BaseDir);
}
// Write out all other paths relative to the base directory if possible.
BaseDirectory.assign(BaseDir.begin(), BaseDir.end());
} else if (!isysroot.empty()) {
// Write out paths relative to the sysroot if possible.
BaseDirectory = isysroot;
}
// Module map file
if (WritingModule && WritingModule->Kind == Module::ModuleMapModule) {
Record.clear();
auto &Map = PP.getHeaderSearchInfo().getModuleMap();
AddPath(WritingModule->PresumedModuleMapFile.empty()
? Map.getModuleMapFileForUniquing(WritingModule)->getName()
: StringRef(WritingModule->PresumedModuleMapFile),
Record);
// Additional module map files.
if (auto *AdditionalModMaps =
Map.getAdditionalModuleMapFiles(WritingModule)) {
Record.push_back(AdditionalModMaps->size());
for (const FileEntry *F : *AdditionalModMaps)
AddPath(F->getName(), Record);
} else {
Record.push_back(0);
}
Stream.EmitRecord(MODULE_MAP_FILE, Record);
}
// Imports
if (Chain) {
serialization::ModuleManager &Mgr = Chain->getModuleManager();
Record.clear();
for (ModuleFile &M : Mgr) {
// Skip modules that weren't directly imported.
if (!M.isDirectlyImported())
continue;
Record.push_back((unsigned)M.Kind); // FIXME: Stable encoding
AddSourceLocation(M.ImportLoc, Record);
// If we have calculated signature, there is no need to store
// the size or timestamp.
Record.push_back(M.Signature ? 0 : M.File->getSize());
Record.push_back(M.Signature ? 0 : getTimestampForOutput(M.File));
for (auto I : M.Signature)
Record.push_back(I);
AddPath(M.FileName, Record);
}
Stream.EmitRecord(IMPORTS, Record);
}
// Write the options block.
Stream.EnterSubblock(OPTIONS_BLOCK_ID, 4);
// Language options.
Record.clear();
const LangOptions &LangOpts = Context.getLangOpts();
#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"
#define SANITIZER(NAME, ID) \
Record.push_back(LangOpts.Sanitize.has(SanitizerKind::ID));
#include "clang/Basic/Sanitizers.def"
Record.push_back(LangOpts.ModuleFeatures.size());
for (StringRef Feature : LangOpts.ModuleFeatures)
AddString(Feature, Record);
Record.push_back((unsigned) LangOpts.ObjCRuntime.getKind());
AddVersionTuple(LangOpts.ObjCRuntime.getVersion(), Record);
AddString(LangOpts.CurrentModule, Record);
// Comment options.
Record.push_back(LangOpts.CommentOpts.BlockCommandNames.size());
for (const auto &I : LangOpts.CommentOpts.BlockCommandNames) {
AddString(I, Record);
}
Record.push_back(LangOpts.CommentOpts.ParseAllComments);
// OpenMP offloading options.
Record.push_back(LangOpts.OMPTargetTriples.size());
for (auto &T : LangOpts.OMPTargetTriples)
AddString(T.getTriple(), Record);
AddString(LangOpts.OMPHostIRFile, Record);
Stream.EmitRecord(LANGUAGE_OPTIONS, Record);
// Target options.
Record.clear();
const TargetInfo &Target = Context.getTargetInfo();
const TargetOptions &TargetOpts = Target.getTargetOpts();
AddString(TargetOpts.Triple, Record);
AddString(TargetOpts.CPU, Record);
AddString(TargetOpts.ABI, Record);
Record.push_back(TargetOpts.FeaturesAsWritten.size());
for (unsigned I = 0, N = TargetOpts.FeaturesAsWritten.size(); I != N; ++I) {
AddString(TargetOpts.FeaturesAsWritten[I], Record);
}
Record.push_back(TargetOpts.Features.size());
for (unsigned I = 0, N = TargetOpts.Features.size(); I != N; ++I) {
AddString(TargetOpts.Features[I], Record);
}
Stream.EmitRecord(TARGET_OPTIONS, Record);
// File system options.
Record.clear();
const FileSystemOptions &FSOpts =
Context.getSourceManager().getFileManager().getFileSystemOpts();
AddString(FSOpts.WorkingDir, Record);
Stream.EmitRecord(FILE_SYSTEM_OPTIONS, Record);
// Header search options.
Record.clear();
const HeaderSearchOptions &HSOpts
= PP.getHeaderSearchInfo().getHeaderSearchOpts();
AddString(HSOpts.Sysroot, Record);
// Include entries.
Record.push_back(HSOpts.UserEntries.size());
for (unsigned I = 0, N = HSOpts.UserEntries.size(); I != N; ++I) {
const HeaderSearchOptions::Entry &Entry = HSOpts.UserEntries[I];
AddString(Entry.Path, Record);
Record.push_back(static_cast<unsigned>(Entry.Group));
Record.push_back(Entry.IsFramework);
Record.push_back(Entry.IgnoreSysRoot);
}
// System header prefixes.
Record.push_back(HSOpts.SystemHeaderPrefixes.size());
for (unsigned I = 0, N = HSOpts.SystemHeaderPrefixes.size(); I != N; ++I) {
AddString(HSOpts.SystemHeaderPrefixes[I].Prefix, Record);
Record.push_back(HSOpts.SystemHeaderPrefixes[I].IsSystemHeader);
}
AddString(HSOpts.ResourceDir, Record);
AddString(HSOpts.ModuleCachePath, Record);
AddString(HSOpts.ModuleUserBuildPath, Record);
Record.push_back(HSOpts.DisableModuleHash);
Record.push_back(HSOpts.ImplicitModuleMaps);
Record.push_back(HSOpts.ModuleMapFileHomeIsCwd);
Record.push_back(HSOpts.UseBuiltinIncludes);
Record.push_back(HSOpts.UseStandardSystemIncludes);
Record.push_back(HSOpts.UseStandardCXXIncludes);
Record.push_back(HSOpts.UseLibcxx);
// Write out the specific module cache path that contains the module files.
AddString(PP.getHeaderSearchInfo().getModuleCachePath(), Record);
Stream.EmitRecord(HEADER_SEARCH_OPTIONS, Record);
// Preprocessor options.
Record.clear();
const PreprocessorOptions &PPOpts = PP.getPreprocessorOpts();
// Macro definitions.
Record.push_back(PPOpts.Macros.size());
for (unsigned I = 0, N = PPOpts.Macros.size(); I != N; ++I) {
AddString(PPOpts.Macros[I].first, Record);
Record.push_back(PPOpts.Macros[I].second);
}
// Includes
Record.push_back(PPOpts.Includes.size());
for (unsigned I = 0, N = PPOpts.Includes.size(); I != N; ++I)
AddString(PPOpts.Includes[I], Record);
// Macro includes
Record.push_back(PPOpts.MacroIncludes.size());
for (unsigned I = 0, N = PPOpts.MacroIncludes.size(); I != N; ++I)
AddString(PPOpts.MacroIncludes[I], Record);
Record.push_back(PPOpts.UsePredefines);
// Detailed record is important since it is used for the module cache hash.
Record.push_back(PPOpts.DetailedRecord);
AddString(PPOpts.ImplicitPCHInclude, Record);
AddString(PPOpts.ImplicitPTHInclude, Record);
Record.push_back(static_cast<unsigned>(PPOpts.ObjCXXARCStandardLibrary));
Stream.EmitRecord(PREPROCESSOR_OPTIONS, Record);
// Leave the options block.
Stream.ExitBlock();
// Original file name and file ID
SourceManager &SM = Context.getSourceManager();
if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) {
auto FileAbbrev = std::make_shared<BitCodeAbbrev>();
FileAbbrev->Add(BitCodeAbbrevOp(ORIGINAL_FILE));
FileAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // File ID
FileAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name
unsigned FileAbbrevCode = Stream.EmitAbbrev(std::move(FileAbbrev));
Record.clear();
Record.push_back(ORIGINAL_FILE);
Record.push_back(SM.getMainFileID().getOpaqueValue());
EmitRecordWithPath(FileAbbrevCode, Record, MainFile->getName());
}
Record.clear();
Record.push_back(SM.getMainFileID().getOpaqueValue());
Stream.EmitRecord(ORIGINAL_FILE_ID, Record);
// Original PCH directory
if (!OutputFile.empty() && OutputFile != "-") {
auto Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(ORIGINAL_PCH_DIR));
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name
unsigned AbbrevCode = Stream.EmitAbbrev(std::move(Abbrev));
SmallString<128> OutputPath(OutputFile);
SM.getFileManager().makeAbsolutePath(OutputPath);
StringRef origDir = llvm::sys::path::parent_path(OutputPath);
RecordData::value_type Record[] = {ORIGINAL_PCH_DIR};
Stream.EmitRecordWithBlob(AbbrevCode, Record, origDir);
}
WriteInputFiles(Context.SourceMgr,
PP.getHeaderSearchInfo().getHeaderSearchOpts(),
PP.getLangOpts().Modules);
Stream.ExitBlock();
}
namespace {
/// \brief An input file.
struct InputFileEntry {
const FileEntry *File;
bool IsSystemFile;
bool IsTransient;
bool BufferOverridden;
bool IsTopLevelModuleMap;
};
} // end anonymous namespace
void ASTWriter::WriteInputFiles(SourceManager &SourceMgr,
HeaderSearchOptions &HSOpts,
bool Modules) {
using namespace llvm;
Stream.EnterSubblock(INPUT_FILES_BLOCK_ID, 4);
// Create input-file abbreviation.
auto IFAbbrev = std::make_shared<BitCodeAbbrev>();
IFAbbrev->Add(BitCodeAbbrevOp(INPUT_FILE));
IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ID
IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 12)); // Size
IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 32)); // Modification time
IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Overridden
IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Transient
IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Module map
IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name
unsigned IFAbbrevCode = Stream.EmitAbbrev(std::move(IFAbbrev));
// Get all ContentCache objects for files, sorted by whether the file is a
// system one or not. System files go at the back, users files at the front.
std::deque<InputFileEntry> SortedFiles;
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);
assert(&SourceMgr.getSLocEntry(FileID::get(I)) == SLoc);
// We only care about file entries that were not overridden.
if (!SLoc->isFile())
continue;
const SrcMgr::FileInfo &File = SLoc->getFile();
const SrcMgr::ContentCache *Cache = File.getContentCache();
if (!Cache->OrigEntry)
continue;
InputFileEntry Entry;
Entry.File = Cache->OrigEntry;
Entry.IsSystemFile = Cache->IsSystemFile;
Entry.IsTransient = Cache->IsTransient;
Entry.BufferOverridden = Cache->BufferOverridden;
Entry.IsTopLevelModuleMap = isModuleMap(File.getFileCharacteristic()) &&
File.getIncludeLoc().isInvalid();
if (Cache->IsSystemFile)
SortedFiles.push_back(Entry);
else
SortedFiles.push_front(Entry);
}
unsigned UserFilesNum = 0;
// Write out all of the input files.
std::vector<uint64_t> InputFileOffsets;
for (const auto &Entry : SortedFiles) {
uint32_t &InputFileID = InputFileIDs[Entry.File];
if (InputFileID != 0)
continue; // already recorded this file.
// Record this entry's offset.
InputFileOffsets.push_back(Stream.GetCurrentBitNo());
InputFileID = InputFileOffsets.size();
if (!Entry.IsSystemFile)
++UserFilesNum;
// Emit size/modification time for this file.
// And whether this file was overridden.
RecordData::value_type Record[] = {
INPUT_FILE,
InputFileOffsets.size(),
(uint64_t)Entry.File->getSize(),
(uint64_t)getTimestampForOutput(Entry.File),
Entry.BufferOverridden,
Entry.IsTransient,
Entry.IsTopLevelModuleMap};
EmitRecordWithPath(IFAbbrevCode, Record, Entry.File->getName());
}
Stream.ExitBlock();
// Create input file offsets abbreviation.
auto OffsetsAbbrev = std::make_shared<BitCodeAbbrev>();
OffsetsAbbrev->Add(BitCodeAbbrevOp(INPUT_FILE_OFFSETS));
OffsetsAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # input files
OffsetsAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # non-system
// input files
OffsetsAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Array
unsigned OffsetsAbbrevCode = Stream.EmitAbbrev(std::move(OffsetsAbbrev));
// Write input file offsets.
RecordData::value_type Record[] = {INPUT_FILE_OFFSETS,
InputFileOffsets.size(), UserFilesNum};
Stream.EmitRecordWithBlob(OffsetsAbbrevCode, Record, bytes(InputFileOffsets));
}
//===----------------------------------------------------------------------===//
// Source Manager Serialization
//===----------------------------------------------------------------------===//
/// \brief Create an abbreviation for the SLocEntry that refers to a
/// file.
static unsigned CreateSLocFileAbbrev(llvm::BitstreamWriter &Stream) {
using namespace llvm;
auto Abbrev = std::make_shared<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, 3)); // Characteristic
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Line directives
// FileEntry fields.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Input File ID
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // NumCreatedFIDs
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 24)); // FirstDeclIndex
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // NumDecls
return Stream.EmitAbbrev(std::move(Abbrev));
}
/// \brief Create an abbreviation for the SLocEntry that refers to a
/// buffer.
static unsigned CreateSLocBufferAbbrev(llvm::BitstreamWriter &Stream) {
using namespace llvm;
auto Abbrev = std::make_shared<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, 3)); // Characteristic
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Line directives
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Buffer name blob
return Stream.EmitAbbrev(std::move(Abbrev));
}
/// \brief Create an abbreviation for the SLocEntry that refers to a
/// buffer's blob.
static unsigned CreateSLocBufferBlobAbbrev(llvm::BitstreamWriter &Stream,
bool Compressed) {
using namespace llvm;
auto Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(Compressed ? SM_SLOC_BUFFER_BLOB_COMPRESSED
: SM_SLOC_BUFFER_BLOB));
if (Compressed)
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Uncompressed size
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Blob
return Stream.EmitAbbrev(std::move(Abbrev));
}
/// \brief Create an abbreviation for the SLocEntry that refers to a macro
/// expansion.
static unsigned CreateSLocExpansionAbbrev(llvm::BitstreamWriter &Stream) {
using namespace llvm;
auto Abbrev = std::make_shared<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(std::move(Abbrev));
}
namespace {
// Trait used for the on-disk hash table of header search information.
class HeaderFileInfoTrait {
ASTWriter &Writer;
// Keep track of the framework names we've used during serialization.
SmallVector<char, 128> FrameworkStringData;
llvm::StringMap<unsigned> FrameworkNameOffset;
public:
HeaderFileInfoTrait(ASTWriter &Writer) : Writer(Writer) {}
struct key_type {
StringRef Filename;
off_t Size;
time_t ModTime;
};
typedef const key_type &key_type_ref;
using UnresolvedModule =
llvm::PointerIntPair<Module *, 2, ModuleMap::ModuleHeaderRole>;
struct data_type {
const HeaderFileInfo &HFI;
ArrayRef<ModuleMap::KnownHeader> KnownHeaders;
UnresolvedModule Unresolved;
};
typedef const data_type &data_type_ref;
typedef unsigned hash_value_type;
typedef unsigned offset_type;
hash_value_type ComputeHash(key_type_ref key) {
// The hash is based only on size/time of the file, so that the reader can
// match even when symlinking or excess path elements ("foo/../", "../")
// change the form of the name. However, complete path is still the key.
return llvm::hash_combine(key.Size, key.ModTime);
}
std::pair<unsigned,unsigned>
EmitKeyDataLength(raw_ostream& Out, key_type_ref key, data_type_ref Data) {
using namespace llvm::support;
endian::Writer<little> LE(Out);
unsigned KeyLen = key.Filename.size() + 1 + 8 + 8;
LE.write<uint16_t>(KeyLen);
unsigned DataLen = 1 + 2 + 4 + 4;
for (auto ModInfo : Data.KnownHeaders)
if (Writer.getLocalOrImportedSubmoduleID(ModInfo.getModule()))
DataLen += 4;
if (Data.Unresolved.getPointer())
DataLen += 4;
LE.write<uint8_t>(DataLen);
return std::make_pair(KeyLen, DataLen);
}
void EmitKey(raw_ostream& Out, key_type_ref key, unsigned KeyLen) {
using namespace llvm::support;
endian::Writer<little> LE(Out);
LE.write<uint64_t>(key.Size);
KeyLen -= 8;
LE.write<uint64_t>(key.ModTime);
KeyLen -= 8;
Out.write(key.Filename.data(), KeyLen);
}
void EmitData(raw_ostream &Out, key_type_ref key,
data_type_ref Data, unsigned DataLen) {
using namespace llvm::support;
endian::Writer<little> LE(Out);
uint64_t Start = Out.tell(); (void)Start;
unsigned char Flags = (Data.HFI.isImport << 5)
| (Data.HFI.isPragmaOnce << 4)
| (Data.HFI.DirInfo << 1)
| Data.HFI.IndexHeaderMapHeader;
LE.write<uint8_t>(Flags);
LE.write<uint16_t>(Data.HFI.NumIncludes);
if (!Data.HFI.ControllingMacro)
LE.write<uint32_t>(Data.HFI.ControllingMacroID);
else
LE.write<uint32_t>(Writer.getIdentifierRef(Data.HFI.ControllingMacro));
unsigned Offset = 0;
if (!Data.HFI.Framework.empty()) {
// If this header refers into a framework, save the framework name.
llvm::StringMap<unsigned>::iterator Pos
= FrameworkNameOffset.find(Data.HFI.Framework);
if (Pos == FrameworkNameOffset.end()) {
Offset = FrameworkStringData.size() + 1;
FrameworkStringData.append(Data.HFI.Framework.begin(),
Data.HFI.Framework.end());
FrameworkStringData.push_back(0);
FrameworkNameOffset[Data.HFI.Framework] = Offset;
} else
Offset = Pos->second;
}
LE.write<uint32_t>(Offset);
auto EmitModule = [&](Module *M, ModuleMap::ModuleHeaderRole Role) {
if (uint32_t ModID = Writer.getLocalOrImportedSubmoduleID(M)) {
uint32_t Value = (ModID << 2) | (unsigned)Role;
assert((Value >> 2) == ModID && "overflow in header module info");
LE.write<uint32_t>(Value);
}
};
// FIXME: If the header is excluded, we should write out some
// record of that fact.
for (auto ModInfo : Data.KnownHeaders)
EmitModule(ModInfo.getModule(), ModInfo.getRole());
if (Data.Unresolved.getPointer())
EmitModule(Data.Unresolved.getPointer(), Data.Unresolved.getInt());
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.
void ASTWriter::WriteHeaderSearch(const HeaderSearch &HS) {
HeaderFileInfoTrait GeneratorTrait(*this);
llvm::OnDiskChainedHashTableGenerator<HeaderFileInfoTrait> Generator;
SmallVector<const char *, 4> SavedStrings;
unsigned NumHeaderSearchEntries = 0;
// Find all unresolved headers for the current module. We generally will
// have resolved them before we get here, but not necessarily: we might be
// compiling a preprocessed module, where there is no requirement for the
// original files to exist any more.
const HeaderFileInfo Empty; // So we can take a reference.
if (WritingModule) {
llvm::SmallVector<Module *, 16> Worklist(1, WritingModule);
while (!Worklist.empty()) {
Module *M = Worklist.pop_back_val();
if (!M->isAvailable())
continue;
// Map to disk files where possible, to pick up any missing stat
// information. This also means we don't need to check the unresolved
// headers list when emitting resolved headers in the first loop below.
// FIXME: It'd be preferable to avoid doing this if we were given
// sufficient stat information in the module map.
HS.getModuleMap().resolveHeaderDirectives(M);
// If the file didn't exist, we can still create a module if we were given
// enough information in the module map.
for (auto U : M->MissingHeaders) {
// Check that we were given enough information to build a module
// without this file existing on disk.
if (!U.Size || (!U.ModTime && IncludeTimestamps)) {
PP->Diag(U.FileNameLoc, diag::err_module_no_size_mtime_for_header)
<< WritingModule->getFullModuleName() << U.Size.hasValue()
<< U.FileName;
continue;
}
// Form the effective relative pathname for the file.
SmallString<128> Filename(M->Directory->getName());
llvm::sys::path::append(Filename, U.FileName);
PreparePathForOutput(Filename);
StringRef FilenameDup = strdup(Filename.c_str());
SavedStrings.push_back(FilenameDup.data());
HeaderFileInfoTrait::key_type Key = {
FilenameDup, *U.Size, IncludeTimestamps ? *U.ModTime : 0
};
HeaderFileInfoTrait::data_type Data = {
Empty, {}, {M, ModuleMap::headerKindToRole(U.Kind)}
};
// FIXME: Deal with cases where there are multiple unresolved header
// directives in different submodules for the same header.
Generator.insert(Key, Data, GeneratorTrait);
++NumHeaderSearchEntries;
}
Worklist.append(M->submodule_begin(), M->submodule_end());
}
}
SmallVector<const FileEntry *, 16> FilesByUID;
HS.getFileMgr().GetUniqueIDMapping(FilesByUID);
if (FilesByUID.size() > HS.header_file_size())
FilesByUID.resize(HS.header_file_size());
for (unsigned UID = 0, LastUID = FilesByUID.size(); UID != LastUID; ++UID) {
const FileEntry *File = FilesByUID[UID];
if (!File)
continue;
// Get the file info. This will load info from the external source if
// necessary. Skip emitting this file if we have no information on it
// as a header file (in which case HFI will be null) or if it hasn't
// changed since it was loaded. Also skip it if it's for a modular header
// from a different module; in that case, we rely on the module(s)
// containing the header to provide this information.
const HeaderFileInfo *HFI =
HS.getExistingFileInfo(File, /*WantExternal*/!Chain);
if (!HFI || (HFI->isModuleHeader && !HFI->isCompilingModuleHeader))
continue;
// Massage the file path into an appropriate form.
StringRef Filename = File->getName();
SmallString<128> FilenameTmp(Filename);
if (PreparePathForOutput(FilenameTmp)) {
// 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.
Filename = StringRef(strdup(FilenameTmp.c_str()));
SavedStrings.push_back(Filename.data());
}
HeaderFileInfoTrait::key_type Key = {
Filename, File->getSize(), getTimestampForOutput(File)
};
HeaderFileInfoTrait::data_type Data = {
*HFI, HS.getModuleMap().findAllModulesForHeader(File), {}
};
Generator.insert(Key, Data, GeneratorTrait);
++NumHeaderSearchEntries;
}
// Create the on-disk hash table in a buffer.
SmallString<4096> TableData;
uint32_t BucketOffset;
{
using namespace llvm::support;
llvm::raw_svector_ostream Out(TableData);
// Make sure that no bucket is at offset 0
endian::Writer<little>(Out).write<uint32_t>(0);
BucketOffset = Generator.Emit(Out, GeneratorTrait);
}
// Create a blob abbreviation
using namespace llvm;
auto Abbrev = std::make_shared<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(std::move(Abbrev));
// Write the header search table
RecordData::value_type Record[] = {HEADER_SEARCH_TABLE, BucketOffset,
NumHeaderSearchEntries, TableData.size()};
TableData.append(GeneratorTrait.strings_begin(),GeneratorTrait.strings_end());
Stream.EmitRecordWithBlob(TableAbbrev, Record, TableData);
// Free all of the strings we had to duplicate.
for (unsigned I = 0, N = SavedStrings.size(); I != N; ++I)
free(const_cast<char *>(SavedStrings[I]));
}
static void emitBlob(llvm::BitstreamWriter &Stream, StringRef Blob,
unsigned SLocBufferBlobCompressedAbbrv,
unsigned SLocBufferBlobAbbrv) {
typedef ASTWriter::RecordData::value_type RecordDataType;
// Compress the buffer if possible. We expect that almost all PCM
// consumers will not want its contents.
SmallString<0> CompressedBuffer;
if (llvm::zlib::isAvailable()) {
llvm::Error E = llvm::zlib::compress(Blob.drop_back(1), CompressedBuffer);
if (!E) {
RecordDataType Record[] = {SM_SLOC_BUFFER_BLOB_COMPRESSED,
Blob.size() - 1};
Stream.EmitRecordWithBlob(SLocBufferBlobCompressedAbbrv, Record,
CompressedBuffer);
return;
}
llvm::consumeError(std::move(E));
}
RecordDataType Record[] = {SM_SLOC_BUFFER_BLOB};
Stream.EmitRecordWithBlob(SLocBufferBlobAbbrv, Record, Blob);
}
/// \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) {
RecordData Record;
// Enter the source manager block.
Stream.EnterSubblock(SOURCE_MANAGER_BLOCK_ID, 4);
// Abbreviations for the various kinds of source-location entries.
unsigned SLocFileAbbrv = CreateSLocFileAbbrev(Stream);
unsigned SLocBufferAbbrv = CreateSLocBufferAbbrev(Stream);
unsigned SLocBufferBlobAbbrv = CreateSLocBufferBlobAbbrev(Stream, false);
unsigned SLocBufferBlobCompressedAbbrv =
CreateSLocBufferBlobAbbrev(Stream, true);
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;
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);
FileID FID = FileID::get(I);
assert(&SourceMgr.getSLocEntry(FID) == SLoc);
// 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;
} 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();
AddSourceLocation(File.getIncludeLoc(), Record);
Record.push_back(File.getFileCharacteristic()); // FIXME: stable encoding
Record.push_back(File.hasLineDirectives());
const SrcMgr::ContentCache *Content = File.getContentCache();
bool EmitBlob = false;
if (Content->OrigEntry) {
assert(Content->OrigEntry == Content->ContentsEntry &&
"Writing to AST an overridden file is not supported");
// The source location entry is a file. Emit input file ID.
assert(InputFileIDs[Content->OrigEntry] != 0 && "Missed file entry");
Record.push_back(InputFileIDs[Content->OrigEntry]);
Record.push_back(File.NumCreatedFIDs);
FileDeclIDsTy::iterator FDI = FileDeclIDs.find(FID);
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);
}
Stream.EmitRecordWithAbbrev(SLocFileAbbrv, Record);
if (Content->BufferOverridden || Content->IsTransient)
EmitBlob = true;
} 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());
StringRef Name = Buffer->getBufferIdentifier();
Stream.EmitRecordWithBlob(SLocBufferAbbrv, Record,
StringRef(Name.data(), Name.size() + 1));
EmitBlob = true;
if (Name == "<built-in>")
PreloadSLocs.push_back(SLocEntryOffsets.size());
}
if (EmitBlob) {
// Include the implicit terminating null character in the on-disk buffer
// if we're writing it uncompressed.
const llvm::MemoryBuffer *Buffer =
Content->getBuffer(PP.getDiagnostics(), PP.getSourceManager());
StringRef Blob(Buffer->getBufferStart(), Buffer->getBufferSize() + 1);
emitBlob(Stream, Blob, SLocBufferBlobCompressedAbbrv,
SLocBufferBlobAbbrv);
}
} else {
// The source location entry is a macro expansion.
const SrcMgr::ExpansionInfo &Expansion = SLoc->getExpansion();
AddSourceLocation(Expansion.getSpellingLoc(), Record);
AddSourceLocation(Expansion.getExpansionLocStart(), Record);
AddSourceLocation(Expansion.isMacroArgExpansion()
? SourceLocation()
: Expansion.getExpansionLocEnd(),
Record);
// 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;
auto Abbrev = std::make_shared<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(std::move(Abbrev));
{
RecordData::value_type Record[] = {
SOURCE_LOCATION_OFFSETS, SLocEntryOffsets.size(),
SourceMgr.getNextLocalOffset() - 1 /* skip dummy */};
Stream.EmitRecordWithBlob(SLocOffsetsAbbrev, Record,
bytes(SLocEntryOffsets));
}
// 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 needed file names.
llvm::DenseMap<int, int> FilenameMap;
for (const auto &L : LineTable) {
if (L.first.ID < 0)
continue;
for (auto &LE : L.second) {
if (FilenameMap.insert(std::make_pair(LE.FilenameID,
FilenameMap.size())).second)
AddPath(LineTable.getFilename(LE.FilenameID), Record);
}
}
Record.push_back(0);
// Emit the line entries
for (const auto &L : LineTable) {
// Only emit entries for local files.
if (L.first.ID < 0)
continue;
// Emit the file ID
Record.push_back(L.first.ID);
// Emit the line entries
Record.push_back(L.second.size());
for (const auto &LE : L.second) {
Record.push_back(LE.FileOffset);
Record.push_back(LE.LineNo);
Record.push_back(FilenameMap[LE.FilenameID]);
Record.push_back((unsigned)LE.FileKind);
Record.push_back(LE.IncludeOffset);
}
}
Stream.EmitRecord(SOURCE_MANAGER_LINE_TABLE, Record);
}
}
//===----------------------------------------------------------------------===//
// Preprocessor Serialization
//===----------------------------------------------------------------------===//
static bool shouldIgnoreMacro(MacroDirective *MD, bool IsModule,
const Preprocessor &PP) {
if (MacroInfo *MI = MD->getMacroInfo())
if (MI->isBuiltinMacro())
return true;
if (IsModule) {
SourceLocation Loc = MD->getLocation();
if (Loc.isInvalid())
return true;
if (PP.getSourceManager().getFileID(Loc) == PP.getPredefinesFileID())
return true;
}
return false;
}
/// \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;
RecordData ModuleMacroRecord;
// If the preprocessor __COUNTER__ value has been bumped, remember it.
if (PP.getCounterValue() != 0) {
RecordData::value_type Record[] = {PP.getCounterValue()};
Stream.EmitRecord(PP_COUNTER_VALUE, Record);
}
if (PP.isRecordingPreamble() && PP.hasRecordedPreamble()) {
assert(!IsModule);
for (const auto &Cond : PP.getPreambleConditionalStack()) {
AddSourceLocation(Cond.IfLoc, Record);
Record.push_back(Cond.WasSkipping);
Record.push_back(Cond.FoundNonSkip);
Record.push_back(Cond.FoundElse);
}
Stream.EmitRecord(PP_CONDITIONAL_STACK, 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: Include a location for the use, and say which one was used.
if (PP.SawDateOrTime())
PP.Diag(SourceLocation(), diag::warn_module_uses_date_time) << IsModule;
// Loop over all the macro directives that are live at the end of the file,
// emitting each to the PP section.
// Construct the list of identifiers with macro directives that need to be
// serialized.
SmallVector<const IdentifierInfo *, 128> MacroIdentifiers;
for (auto &Id : PP.getIdentifierTable())
if (Id.second->hadMacroDefinition() &&
(!Id.second->isFromAST() ||
Id.second->hasChangedSinceDeserialization()))
MacroIdentifiers.push_back(Id.second);
// Sort the set of macro definitions that need to be serialized by the
// name of the macro, to provide a stable ordering.
std::sort(MacroIdentifiers.begin(), MacroIdentifiers.end(),
llvm::less_ptr<IdentifierInfo>());
// Emit the macro directives as a list and associate the offset with the
// identifier they belong to.
for (const IdentifierInfo *Name : MacroIdentifiers) {
MacroDirective *MD = PP.getLocalMacroDirectiveHistory(Name);
auto StartOffset = Stream.GetCurrentBitNo();
// Emit the macro directives in reverse source order.
for (; MD; MD = MD->getPrevious()) {
// Once we hit an ignored macro, we're done: the rest of the chain
// will all be ignored macros.
if (shouldIgnoreMacro(MD, IsModule, PP))
break;
AddSourceLocation(MD->getLocation(), Record);
Record.push_back(MD->getKind());
if (auto *DefMD = dyn_cast<DefMacroDirective>(MD)) {
Record.push_back(getMacroRef(DefMD->getInfo(), Name));
} else if (auto *VisMD = dyn_cast<VisibilityMacroDirective>(MD)) {
Record.push_back(VisMD->isPublic());
}
}
// Write out any exported module macros.
bool EmittedModuleMacros = false;
// We write out exported module macros for PCH as well.
auto Leafs = PP.getLeafModuleMacros(Name);
SmallVector<ModuleMacro*, 8> Worklist(Leafs.begin(), Leafs.end());
llvm::DenseMap<ModuleMacro*, unsigned> Visits;
while (!Worklist.empty()) {
auto *Macro = Worklist.pop_back_val();
// Emit a record indicating this submodule exports this macro.
ModuleMacroRecord.push_back(
getSubmoduleID(Macro->getOwningModule()));
ModuleMacroRecord.push_back(getMacroRef(Macro->getMacroInfo(), Name));
for (auto *M : Macro->overrides())
ModuleMacroRecord.push_back(getSubmoduleID(M->getOwningModule()));
Stream.EmitRecord(PP_MODULE_MACRO, ModuleMacroRecord);
ModuleMacroRecord.clear();
// Enqueue overridden macros once we've visited all their ancestors.
for (auto *M : Macro->overrides())
if (++Visits[M] == M->getNumOverridingMacros())
Worklist.push_back(M);
EmittedModuleMacros = true;
}
if (Record.empty() && !EmittedModuleMacros)
continue;
IdentMacroDirectivesOffsetMap[Name] = StartOffset;
Stream.EmitRecord(PP_MACRO_DIRECTIVE_HISTORY, Record);
Record.clear();
}
/// \brief Offsets of each of the macros into the bitstream, indexed by
/// the local macro ID