| Andrew Walbran | 3d2c197 | 2020-04-07 12:24:26 +0100 | [diff] [blame^] | 1 | //===- CSEConfigBase.h - A CSEConfig interface ------------------*- 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 | #ifndef LLVM_CODEGEN_CSECONFIG_BASE_H |
| 10 | #define LLVM_CODEGEN_CSECONFIG_BASE_H |
| 11 | |
| 12 | namespace llvm { |
| 13 | // Class representing some configuration that can be done during GlobalISel's |
| 14 | // CSEInfo analysis. We define it here because TargetPassConfig can't depend on |
| 15 | // the GlobalISel library, and so we use this in the interface between them |
| 16 | // so that the derived classes in GISel can reference generic opcodes. |
| 17 | class CSEConfigBase { |
| 18 | public: |
| 19 | virtual ~CSEConfigBase() = default; |
| 20 | // Hook for defining which Generic instructions should be CSEd. |
| 21 | // GISelCSEInfo currently only calls this hook when dealing with generic |
| 22 | // opcodes. |
| 23 | virtual bool shouldCSEOpc(unsigned Opc) { return false; } |
| 24 | }; |
| 25 | |
| 26 | } // namespace llvm |
| 27 | |
| 28 | #endif // LLVM_CODEGEN_CSECONFIG_BASE_H |