path: root/lib/Frontend/PCHWriter.cpp

//===--- PCHWriter.h - Precompiled Headers 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 PCHWriter class, which writes a precompiled header.
//
//===----------------------------------------------------------------------===//

#include "clang/Frontend/PCHWriter.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclContextInternals.h"
#include "clang/AST/DeclVisitor.h"
#include "clang/AST/Type.h"
#include "clang/Lex/MacroInfo.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/SourceManagerInternals.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/Bitcode/BitstreamWriter.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/MemoryBuffer.h"
#include <cstdio>
using namespace clang;

//===----------------------------------------------------------------------===//
// Type serialization
//===----------------------------------------------------------------------===//
namespace {
  class VISIBILITY_HIDDEN PCHTypeWriter {
    PCHWriter &Writer;
    PCHWriter::RecordData &Record;

  public:
    /// \brief Type code that corresponds to the record generated.
    pch::TypeCode Code;

    PCHTypeWriter(PCHWriter &Writer, PCHWriter::RecordData &Record) 
      : Writer(Writer), Record(Record) { }

    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)
#define DEPENDENT_TYPE(Class, Base)
#include "clang/AST/TypeNodes.def"
  };
}

void PCHTypeWriter::VisitExtQualType(const ExtQualType *T) {
  Writer.AddTypeRef(QualType(T->getBaseType(), 0), Record);
  Record.push_back(T->getObjCGCAttr()); // FIXME: use stable values
  Record.push_back(T->getAddressSpace());
  Code = pch::TYPE_EXT_QUAL;
}

void PCHTypeWriter::VisitBuiltinType(const BuiltinType *T) {
  assert(false && "Built-in types are never serialized");
}

void PCHTypeWriter::VisitFixedWidthIntType(const FixedWidthIntType *T) {
  Record.push_back(T->getWidth());
  Record.push_back(T->isSigned());
  Code = pch::TYPE_FIXED_WIDTH_INT;
}

void PCHTypeWriter::VisitComplexType(const ComplexType *T) {
  Writer.AddTypeRef(T->getElementType(), Record);
  Code = pch::TYPE_COMPLEX;
}

void PCHTypeWriter::VisitPointerType(const PointerType *T) {
  Writer.AddTypeRef(T->getPointeeType(), Record);
  Code = pch::TYPE_POINTER;
}

void PCHTypeWriter::VisitBlockPointerType(const BlockPointerType *T) {
  Writer.AddTypeRef(T->getPointeeType(), Record);  
  Code = pch::TYPE_BLOCK_POINTER;
}

void PCHTypeWriter::VisitLValueReferenceType(const LValueReferenceType *T) {
  Writer.AddTypeRef(T->getPointeeType(), Record);
  Code = pch::TYPE_LVALUE_REFERENCE;
}

void PCHTypeWriter::VisitRValueReferenceType(const RValueReferenceType *T) {
  Writer.AddTypeRef(T->getPointeeType(), Record);
  Code = pch::TYPE_RVALUE_REFERENCE;
}

void PCHTypeWriter::VisitMemberPointerType(const MemberPointerType *T) {
  Writer.AddTypeRef(T->getPointeeType(), Record);  
  Writer.AddTypeRef(QualType(T->getClass(), 0), Record);  
  Code = pch::TYPE_MEMBER_POINTER;
}

void PCHTypeWriter::VisitArrayType(const ArrayType *T) {
  Writer.AddTypeRef(T->getElementType(), Record);
  Record.push_back(T->getSizeModifier()); // FIXME: stable values
  Record.push_back(T->getIndexTypeQualifier()); // FIXME: stable values
}

void PCHTypeWriter::VisitConstantArrayType(const ConstantArrayType *T) {
  VisitArrayType(T);
  Writer.AddAPInt(T->getSize(), Record);
  Code = pch::TYPE_CONSTANT_ARRAY;
}

void PCHTypeWriter::VisitIncompleteArrayType(const IncompleteArrayType *T) {
  VisitArrayType(T);
  Code = pch::TYPE_INCOMPLETE_ARRAY;
}

void PCHTypeWriter::VisitVariableArrayType(const VariableArrayType *T) {
  VisitArrayType(T);
  // FIXME: Serialize array size expression.
  assert(false && "Cannot serialize variable-length arrays");
  Code = pch::TYPE_VARIABLE_ARRAY;
}

void PCHTypeWriter::VisitVectorType(const VectorType *T) {
  Writer.AddTypeRef(T