1 //===----- CXXABI.h - Interface to C++ ABIs ---------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This provides an abstract class for C++ AST support. Concrete
11 // subclasses of this implement AST support for specific C++ ABIs.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CLANG_LIB_AST_CXXABI_H
16 #define LLVM_CLANG_LIB_AST_CXXABI_H
18 #include "clang/AST/Type.h"
23 class CXXConstructorDecl;
25 class MemberPointerType;
26 class MangleNumberingContext;
28 /// Implements C++ ABI-specific semantic analysis functions.
33 /// Returns the width and alignment of a member pointer in bits.
34 virtual std::pair<uint64_t, unsigned>
35 getMemberPointerWidthAndAlign(const MemberPointerType *MPT) const = 0;
37 /// Returns the default calling convention for C++ methods.
38 virtual CallingConv getDefaultMethodCallConv(bool isVariadic) const = 0;
40 /// Returns whether the given class is nearly empty, with just virtual
41 /// pointers and no data except possibly virtual bases.
42 virtual bool isNearlyEmpty(const CXXRecordDecl *RD) const = 0;
44 /// Returns a new mangling number context for this C++ ABI.
45 virtual MangleNumberingContext *createMangleNumberingContext() const = 0;
47 /// Adds a mapping from class to copy constructor for this C++ ABI.
48 virtual void addCopyConstructorForExceptionObject(CXXRecordDecl *,
49 CXXConstructorDecl *) = 0;
51 /// Retrieves the mapping from class to copy constructor for this C++ ABI.
52 virtual const CXXConstructorDecl *
53 getCopyConstructorForExceptionObject(CXXRecordDecl *) = 0;
55 virtual void addDefaultArgExprForConstructor(const CXXConstructorDecl *CD,
56 unsigned ParmIdx, Expr *DAE) = 0;
58 virtual Expr *getDefaultArgExprForConstructor(const CXXConstructorDecl *CD,
59 unsigned ParmIdx) = 0;
62 /// Creates an instance of a C++ ABI class.
63 CXXABI *CreateItaniumCXXABI(ASTContext &Ctx);
64 CXXABI *CreateMicrosoftCXXABI(ASTContext &Ctx);