1//===- ScheduleDAGMutation.h - MachineInstr Scheduling ----------*- C++ -*-===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file implements the ScheduleDAGMutation class, which represents 10// a target-specific mutation of the dependency graph for scheduling. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CODEGEN_SCHEDULEDAGMUTATION_H 15#define LLVM_CODEGEN_SCHEDULEDAGMUTATION_H 16 17namespace llvm { 18 19class ScheduleDAGInstrs; 20 21/// Mutate the DAG as a postpass after normal DAG building. 22class ScheduleDAGMutation { 23 virtual void anchor(); 24 25public: 26 virtual ~ScheduleDAGMutation() = default; 27 28 virtual void apply(ScheduleDAGInstrs *DAG) = 0; 29}; 30 31} // end namespace llvm 32 33#endif // LLVM_CODEGEN_SCHEDULEDAGMUTATION_H 34