LLVM  10.0.0svn
CSEConfigBase.h
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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.
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
This class represents lattice values for constants.
Definition: AllocatorList.h:23
virtual bool shouldCSEOpc(unsigned Opc)
Definition: CSEConfigBase.h:23
virtual ~CSEConfigBase()=default