include/llvm/CodeGen/ScheduleDAGMutation.h

   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
  17 namespace llvm {
  18
  19 class ScheduleDAGInstrs;
  20
  21 /// Mutate the DAG as a postpass after normal DAG building.
  22 class ScheduleDAGMutation {
  23   virtual void anchor();
  24
  25 public:
  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