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//==- ScheduleDAGMutation.h - MachineInstr Scheduling ------------*- C++ -*-==//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the ScheduleDAGMutation class, which represents
// a target-specific mutation of the dependency graph for scheduling.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_SCHEDULEDAGMUTATION_H
#define LLVM_CODEGEN_SCHEDULEDAGMUTATION_H

namespace llvm {
  class ScheduleDAGInstrs;

  /// Mutate the DAG as a postpass after normal DAG building.
  class ScheduleDAGMutation {
    virtual void anchor();
  public:
    virtual ~ScheduleDAGMutation() {}

    virtual void apply(ScheduleDAGInstrs *DAG) = 0;
  };
}

#endif