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//===- ASTRecordLayoutBuilder.h - Helper class for building record layouts ===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_RECORDLAYOUTBUILDER_H
#define LLVM_CLANG_AST_RECORDLAYOUTBUILDER_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/Support/DataTypes.h"
namespace clang {
class ASTContext;
class ASTRecordLayout;
class CXXRecordDecl;
class FieldDecl;
class ObjCImplementationDecl;
class ObjCInterfaceDecl;
class RecordDecl;
class ASTRecordLayoutBuilder {
ASTContext &Ctx;
uint64_t Size;
unsigned Alignment;
llvm::SmallVector<uint64_t, 16> FieldOffsets;
bool Packed;
unsigned MaxFieldAlignment;
uint64_t NextOffset;
bool IsUnion;
uint64_t NonVirtualSize;
unsigned NonVirtualAlignment;
const CXXRecordDecl *PrimaryBase;
bool PrimaryBaseWasVirtual;
llvm::SmallVector<const CXXRecordDecl *, 4> Bases;
llvm::SmallVector<uint64_t, 4> BaseOffsets;
ASTRecordLayoutBuilder(ASTContext &Ctx);
void Layout(const RecordDecl *D);
void Layout(const CXXRecordDecl *D);
void Layout(const ObjCInterfaceDecl *D,
const ObjCImplementationDecl *Impl);
void LayoutFields(const RecordDecl *D);
void LayoutField(const FieldDecl *D);
void SelectPrimaryBase(const CXXRecordDecl *RD);
void SelectPrimaryVBase(const CXXRecordDecl *RD,
const CXXRecordDecl *&FirstPrimary,
llvm::SmallSet<const CXXRecordDecl*, 32> &IndirectPrimary);
void SelectPrimaryForBase(const CXXRecordDecl *RD,
llvm::SmallSet<const CXXRecordDecl*, 32> &IndirectPrimary);
void setPrimaryBase(const CXXRecordDecl *PB, bool Virtual) {
PrimaryBase = PB;
PrimaryBaseWasVirtual = Virtual;
}
bool IsNearlyEmpty(const CXXRecordDecl *RD);
void LayoutVtable(const CXXRecordDecl *RD);
void LayoutNonVirtualBases(const CXXRecordDecl *RD);
void LayoutBaseNonVirtually(const CXXRecordDecl *RD);
void LayoutVirtualBase(const CXXRecordDecl *RD);
void LayoutVirtualBases(const CXXRecordDecl *RD);
/// FinishLayout - Finalize record layout. Adjust record size based on the
/// alignment.
void FinishLayout();
void UpdateAlignment(unsigned NewAlignment);
ASTRecordLayoutBuilder(const ASTRecordLayoutBuilder&); // DO NOT IMPLEMENT
void operator=(const ASTRecordLayoutBuilder&); // DO NOT IMPLEMENT
public:
static const ASTRecordLayout *ComputeLayout(ASTContext &Ctx,
const RecordDecl *RD);
static const ASTRecordLayout *ComputeLayout(ASTContext &Ctx,
const ObjCInterfaceDecl *D,
const ObjCImplementationDecl *Impl);
};
} // end namespace clang
#endif
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