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//===--- CGVtable.h - Emit LLVM Code for C++ vtables ----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This contains code dealing with C++ code generation of virtual tables.
//
//===----------------------------------------------------------------------===//
#ifndef CLANG_CODEGEN_CGVTABLE_H
#define CLANG_CODEGEN_CGVTABLE_H
#include "llvm/ADT/DenseMap.h"
namespace clang {
class CXXMethodDecl;
class CXXRecordDecl;
namespace CodeGen {
class CodeGenModule;
class CGVtableInfo {
CodeGenModule &CGM;
/// MethodVtableIndices - Contains the index (relative to the vtable address
/// point) where the function pointer for a virtual function is stored.
typedef llvm::DenseMap<const CXXMethodDecl *, int64_t> MethodVtableIndicesTy;
MethodVtableIndicesTy MethodVtableIndices;
typedef std::pair<const CXXRecordDecl *,
const CXXRecordDecl *> ClassPairTy;
/// VirtualBaseClassIndicies - Contains the index into the vtable where the
/// offsets for virtual bases of a class are stored.
typedef llvm::DenseMap<ClassPairTy, int64_t> VirtualBaseClassIndiciesTy;
VirtualBaseClassIndiciesTy VirtualBaseClassIndicies;
public:
CGVtableInfo(CodeGenModule &CGM)
: CGM(CGM) { }
/// getMethodVtableIndex - Return the index (relative to the vtable address
/// point) where the function pointer for the given virtual function is
/// stored.
int64_t getMethodVtableIndex(const CXXMethodDecl *MD);
/// getVirtualBaseOffsetIndex - Return the index (relative to the vtable address
/// point) where the offset of the given virtual base of the given class is
// stored.
int64_t getVirtualBaseOffsetIndex(const CXXRecordDecl *RD,
const CXXRecordDecl *VBase);
};
}
}
#endif
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