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