| //===----- CXXABI.h - Interface to C++ ABIs ---------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This provides an abstract class for C++ AST support. Concrete |
| // subclasses of this implement AST support for specific C++ ABIs. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_LIB_AST_CXXABI_H |
| #define LLVM_CLANG_LIB_AST_CXXABI_H |
| |
| #include "clang/AST/Type.h" |
| |
| namespace clang { |
| |
| class ASTContext; |
| class CXXConstructorDecl; |
| class DeclaratorDecl; |
| class Expr; |
| class MemberPointerType; |
| class MangleNumberingContext; |
| |
| /// Implements C++ ABI-specific semantic analysis functions. |
| class CXXABI { |
| public: |
| virtual ~CXXABI(); |
| |
| struct MemberPointerInfo { |
| uint64_t Width; |
| unsigned Align; |
| bool HasPadding; |
| }; |
| |
| /// Returns the width and alignment of a member pointer in bits, as well as |
| /// whether it has padding. |
| virtual MemberPointerInfo |
| getMemberPointerInfo(const MemberPointerType *MPT) const = 0; |
| |
| /// Returns the default calling convention for C++ methods. |
| virtual CallingConv getDefaultMethodCallConv(bool isVariadic) const = 0; |
| |
| /// Returns whether the given class is nearly empty, with just virtual |
| /// pointers and no data except possibly virtual bases. |
| virtual bool isNearlyEmpty(const CXXRecordDecl *RD) const = 0; |
| |
| /// Returns a new mangling number context for this C++ ABI. |
| virtual std::unique_ptr<MangleNumberingContext> |
| createMangleNumberingContext() const = 0; |
| |
| /// Adds a mapping from class to copy constructor for this C++ ABI. |
| virtual void addCopyConstructorForExceptionObject(CXXRecordDecl *, |
| CXXConstructorDecl *) = 0; |
| |
| /// Retrieves the mapping from class to copy constructor for this C++ ABI. |
| virtual const CXXConstructorDecl * |
| getCopyConstructorForExceptionObject(CXXRecordDecl *) = 0; |
| |
| virtual void addTypedefNameForUnnamedTagDecl(TagDecl *TD, |
| TypedefNameDecl *DD) = 0; |
| |
| virtual TypedefNameDecl * |
| getTypedefNameForUnnamedTagDecl(const TagDecl *TD) = 0; |
| |
| virtual void addDeclaratorForUnnamedTagDecl(TagDecl *TD, |
| DeclaratorDecl *DD) = 0; |
| |
| virtual DeclaratorDecl *getDeclaratorForUnnamedTagDecl(const TagDecl *TD) = 0; |
| }; |
| |
| /// Creates an instance of a C++ ABI class. |
| CXXABI *CreateItaniumCXXABI(ASTContext &Ctx); |
| CXXABI *CreateMicrosoftCXXABI(ASTContext &Ctx); |
| } |
| |
| #endif |