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Because CodeGen can't depend on GlobalISel, we need a way to encapsulate the CSE configs that can be passed between TargetPassConfig and the targets' custom pass configs. This CSEConfigBase allows targets to create custom CSE configs which is then used by the GISel passes for the CSEMIRBuilder. This support will be used in a follow up commit to allow constant-only CSE for -O0 compiles in D60580. llvm-svn: 358368
29 lines
1.1 KiB
C++
29 lines
1.1 KiB
C++
//===- CSEConfigBase.h - A CSEConfig interface ------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_CSECONFIG_BASE_H
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#define LLVM_CODEGEN_CSECONFIG_BASE_H
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namespace llvm {
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// Class representing some configuration that can be done during GlobalISel's
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// CSEInfo analysis. We define it here because TargetPassConfig can't depend on
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// the GlobalISel library, and so we use this in the interface between them
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// so that the derived classes in GISel can reference generic opcodes.
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class CSEConfigBase {
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public:
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virtual ~CSEConfigBase() = default;
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// Hook for defining which Generic instructions should be CSEd.
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// GISelCSEInfo currently only calls this hook when dealing with generic
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// opcodes.
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virtual bool shouldCSEOpc(unsigned Opc) { return false; }
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};
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} // namespace llvm
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#endif // LLVM_CODEGEN_CSECONFIG_BASE_H
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