6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
//===-- llvm/CodeGen/MachineCombinerPattern.h - Instruction pattern supported by
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// combiner ------*- 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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//
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// This file defines instruction pattern supported by combiner
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_MACHINECOMBINERPATTERN_H
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#define LLVM_CODEGEN_MACHINECOMBINERPATTERN_H
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namespace llvm {
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/// The combiner's goal may differ based on which pattern it is attempting
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/// to optimize.
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enum class CombinerObjective {
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MustReduceDepth, // The data dependency chain must be improved.
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MustReduceRegisterPressure, // The register pressure must be reduced.
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Default // The critical path must not be lengthened.
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};
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/// These are instruction patterns matched by the machine combiner pass.
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enum MachineCombinerPattern : unsigned {
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// These are commutative variants for reassociating a computation chain. See
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// the comments before getMachineCombinerPatterns() in TargetInstrInfo.cpp.
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REASSOC_AX_BY,
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REASSOC_AX_YB,
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REASSOC_XA_BY,
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REASSOC_XA_YB,
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TARGET_PATTERN_START
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};
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} // end namespace llvm
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#endif
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