| 1 | //===- CSEConfigBase.h - A CSEConfig interface ------------------*- 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 | #ifndef LLVM_CODEGEN_CSECONFIGBASE_H |
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| 10 | #define LLVM_CODEGEN_CSECONFIGBASE_H |
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| 11 | |
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| 12 | namespace llvm { |
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| 13 | // Class representing some configuration that can be done during GlobalISel's |
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| 14 | // CSEInfo analysis. We define it here because TargetPassConfig can't depend on |
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| 15 | // the GlobalISel library, and so we use this in the interface between them |
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| 16 | // so that the derived classes in GISel can reference generic opcodes. |
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| 17 | class CSEConfigBase { |
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| 18 | public: |
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| 19 | virtual ~CSEConfigBase() = default; |
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| 20 | // Hook for defining which Generic instructions should be CSEd. |
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| 21 | // GISelCSEInfo currently only calls this hook when dealing with generic |
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| 22 | // opcodes. |
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| 23 | virtual bool shouldCSEOpc(unsigned Opc) { return false; } |
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| 24 | }; |
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| 25 | |
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| 26 | } // namespace llvm |
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| 27 | |
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| 28 | #endif // LLVM_CODEGEN_CSECONFIGBASE_H |
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| 29 | |
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