CIRCXXABI.h

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//===----- CIRCXXABI.h - Interface to C++ ABIs for CIR Dialect --*- 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 file partially mimics the CodeGen/CGCXXABI.h class. The main difference
// is that this is adapted to operate on the CIR dialect.
//
//===----------------------------------------------------------------------===//
 
#ifndef CLANG_LIB_CIR_DIALECT_TRANSFORMS_TARGETLOWERING_CIRCXXABI_H
#define CLANG_LIB_CIR_DIALECT_TRANSFORMS_TARGETLOWERING_CIRCXXABI_H
 
#include "mlir/Transforms/DialectConversion.h"
#include "clang/CIR/Dialect/IR/CIRDialect.h"
#include "clang/CIR/Dialect/IR/CIRTypes.h"
 
namespace cir {
 
// Forward declarations.
class LowerModule;
 
class CIRCXXABI {
  friend class LowerModule;
 
protected:
  LowerModule &lm;
 
  CIRCXXABI(LowerModule &lm) : lm(lm) {}
 
public:
  virtual ~CIRCXXABI();
 
  /// Lower the given data member pointer type to its ABI type. The returned
  /// type is also a CIR type.
  virtual mlir::Type
  lowerDataMemberType(cir::DataMemberType type,
                      const mlir::TypeConverter &typeConverter) const = 0;
 
  /// Lower the given data member pointer constant to a constant of the ABI
  /// type. The returned constant is represented as an attribute as well.
  virtual mlir::TypedAttr
  lowerDataMemberConstant(cir::DataMemberAttr attr,
                          const mlir::DataLayout &layout,
                          const mlir::TypeConverter &typeConverter) const = 0;
 
  /// Lower the given cir.get_runtime_member op to a sequence of more
  /// "primitive" CIR operations that act on the ABI types.
  virtual mlir::Operation *
  lowerGetRuntimeMember(cir::GetRuntimeMemberOp op, mlir::Type loweredResultTy,
                        mlir::Value loweredAddr, mlir::Value loweredMember,
                        mlir::OpBuilder &builder) const = 0;
};
 
/// Creates an Itanium-family ABI.
std::unique_ptr<CIRCXXABI> createItaniumCXXABI(LowerModule &lm);
 
} // namespace cir
 
#endif // CLANG_LIB_CIR_DIALECT_TRANSFORMS_TARGETLOWERING_CIRCXXABI_H