include/llvm/CodeGen/CSEConfigBase.h

   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