llvm/mlir/include/mlir/IR/IRMapping.h

//===- IRMapping.h ----------------------------------------------*- 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 defines a utility class for maintaining a mapping of SSA values,
// blocks, and operations.
//
//===----------------------------------------------------------------------===//

#ifndef MLIR_IR_IRMAPPING_H
#define MLIR_IR_IRMAPPING_H

#include "mlir/IR/Block.h"

namespace mlir {
/// This is a utility class for mapping one set of IR entities to another. New
/// mappings can be inserted via 'map'. Existing mappings can be
/// found via the 'lookup*' functions. There are three variants that differ only
/// in return value when an existing is not found for the provided key: SSA
/// values, blocks, and operations. 'lookupOrNull' returns nullptr where as
/// 'lookupOrDefault' will return the lookup key.
class IRMapping { … };

} // namespace mlir

#endif // MLIR_IR_IRMAPPING_H