1//==- ScheduleDAGMutation.h - MachineInstr Scheduling ------------*- 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 file implements the ScheduleDAGMutation class, which represents 11// a target-specific mutation of the dependency graph for scheduling. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CODEGEN_SCHEDULEDAGMUTATION_H 16#define LLVM_CODEGEN_SCHEDULEDAGMUTATION_H 17 18namespace llvm { 19 class ScheduleDAGInstrs; 20 21 /// Mutate the DAG as a postpass after normal DAG building. 22 class ScheduleDAGMutation { 23 virtual void anchor(); 24 public: 25 virtual ~ScheduleDAGMutation() {} 26 27 virtual void apply(ScheduleDAGInstrs *DAG) = 0; 28 }; 29} 30 31#endif 32