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_LIB_AST_CXXABI_H 16 #define LLVM_CLANG_LIB_AST_CXXABI_H 17 18 #include "clang/AST/Type.h" 19 20 namespace clang { 21 22 class ASTContext; 23 class CXXConstructorDecl; 24 class DeclaratorDecl; 25 class Expr; 26 class MemberPointerType; 27 class MangleNumberingContext; 28 29 /// Implements C++ ABI-specific semantic analysis functions. 30 class CXXABI { 31 public: 32 virtual ~CXXABI(); 33 34 /// Returns the width and alignment of a member pointer in bits. 35 virtual std::pair<uint64_t, unsigned> 36 getMemberPointerWidthAndAlign(const MemberPointerType *MPT) const = 0; 37 38 /// Returns the default calling convention for C++ methods. 39 virtual CallingConv getDefaultMethodCallConv(bool isVariadic) const = 0; 40 41 /// Returns whether the given class is nearly empty, with just virtual 42 /// pointers and no data except possibly virtual bases. 43 virtual bool isNearlyEmpty(const CXXRecordDecl *RD) const = 0; 44 45 /// Returns a new mangling number context for this C++ ABI. 46 virtual MangleNumberingContext *createMangleNumberingContext() const = 0; 47 48 /// Adds a mapping from class to copy constructor for this C++ ABI. 49 virtual void addCopyConstructorForExceptionObject(CXXRecordDecl *, 50 CXXConstructorDecl *) = 0; 51 52 /// Retrieves the mapping from class to copy constructor for this C++ ABI. 53 virtual const CXXConstructorDecl * 54 getCopyConstructorForExceptionObject(CXXRecordDecl *) = 0; 55 56 virtual void addDefaultArgExprForConstructor(const CXXConstructorDecl *CD, 57 unsigned ParmIdx, Expr *DAE) = 0; 58 59 virtual Expr *getDefaultArgExprForConstructor(const CXXConstructorDecl *CD, 60 unsigned ParmIdx) = 0; 61 62 virtual void addTypedefNameForUnnamedTagDecl(TagDecl *TD, 63 TypedefNameDecl *DD) = 0; 64 65 virtual TypedefNameDecl * 66 getTypedefNameForUnnamedTagDecl(const TagDecl *TD) = 0; 67 68 virtual void addDeclaratorForUnnamedTagDecl(TagDecl *TD, 69 DeclaratorDecl *DD) = 0; 70 71 virtual DeclaratorDecl *getDeclaratorForUnnamedTagDecl(const TagDecl *TD) = 0; 72 }; 73 74 /// Creates an instance of a C++ ABI class. 75 CXXABI *CreateItaniumCXXABI(ASTContext &Ctx); 76 CXXABI *CreateMicrosoftCXXABI(ASTContext &Ctx); 77 } 78 79 #endif 80
