1//===----- CXXABI.h - Interface to C++ ABIs ---------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This provides an abstract class for C++ AST support. Concrete 11// subclasses of this implement AST support for specific C++ ABIs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_AST_CXXABI_H 16#define LLVM_CLANG_AST_CXXABI_H 17 18#include "clang/AST/Type.h" 19 20namespace clang { 21 22class ASTContext; 23class MemberPointerType; 24 25/// Implements C++ ABI-specific semantic analysis functions. 26class CXXABI { 27public: 28 virtual ~CXXABI(); 29 30 /// Returns the size of a member pointer in multiples of the target 31 /// pointer size. 32 virtual unsigned getMemberPointerSize(const MemberPointerType *MPT) const = 0; 33 34 /// Returns the default calling convention for C++ methods. 35 virtual CallingConv getDefaultMethodCallConv() const = 0; 36 37 // Returns whether the given class is nearly empty, with just virtual pointers 38 // and no data except possibly virtual bases. 39 virtual bool isNearlyEmpty(const CXXRecordDecl *RD) const = 0; 40}; 41 42/// Creates an instance of a C++ ABI class. 43CXXABI *CreateARMCXXABI(ASTContext &Ctx); 44CXXABI *CreateItaniumCXXABI(ASTContext &Ctx); 45CXXABI *CreateMicrosoftCXXABI(ASTContext &Ctx); 46} 47 48#endif 49