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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
//=== lib/CodeGen/GlobalISel/MipsPreLegalizerCombiner.cpp --------------===//
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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 pass does combining of machine instructions at the generic MI level,
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// before the legalizer.
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//
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//===----------------------------------------------------------------------===//
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#include "MipsTargetMachine.h"
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#include "llvm/CodeGen/GlobalISel/Combiner.h"
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#include "llvm/CodeGen/GlobalISel/CombinerInfo.h"
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#include "llvm/CodeGen/GlobalISel/MIPatternMatch.h"
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#include "llvm/CodeGen/TargetPassConfig.h"
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#define DEBUG_TYPE "mips-prelegalizer-combiner"
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using namespace llvm;
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namespace {
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class MipsPreLegalizerCombinerInfo : public CombinerInfo {
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public:
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MipsPreLegalizerCombinerInfo()
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: CombinerInfo(/*AllowIllegalOps*/ true, /*ShouldLegalizeIllegal*/ false,
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/*LegalizerInfo*/ nullptr) {}
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virtual bool combine(GISelChangeObserver &Observer, MachineInstr &MI,
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MachineIRBuilder &B) const override;
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};
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bool MipsPreLegalizerCombinerInfo::combine(GISelChangeObserver &Observer,
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MachineInstr &MI,
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MachineIRBuilder &B) const {
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return false;
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}
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// Pass boilerplate
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// ================
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class MipsPreLegalizerCombiner : public MachineFunctionPass {
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public:
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static char ID;
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MipsPreLegalizerCombiner();
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StringRef getPassName() const override { return "MipsPreLegalizerCombiner"; }
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bool runOnMachineFunction(MachineFunction &MF) override;
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void getAnalysisUsage(AnalysisUsage &AU) const override;
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};
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} // end anonymous namespace
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void MipsPreLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequired<TargetPassConfig>();
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AU.setPreservesCFG();
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getSelectionDAGFallbackAnalysisUsage(AU);
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MachineFunctionPass::getAnalysisUsage(AU);
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}
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MipsPreLegalizerCombiner::MipsPreLegalizerCombiner() : MachineFunctionPass(ID) {
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initializeMipsPreLegalizerCombinerPass(*PassRegistry::getPassRegistry());
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}
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bool MipsPreLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
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if (MF.getProperties().hasProperty(
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MachineFunctionProperties::Property::FailedISel))
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return false;
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auto *TPC = &getAnalysis<TargetPassConfig>();
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MipsPreLegalizerCombinerInfo PCInfo;
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Combiner C(PCInfo, TPC);
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return C.combineMachineInstrs(MF, nullptr);
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}
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char MipsPreLegalizerCombiner::ID = 0;
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INITIALIZE_PASS_BEGIN(MipsPreLegalizerCombiner, DEBUG_TYPE,
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"Combine Mips machine instrs before legalization", false,
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false)
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INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
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INITIALIZE_PASS_END(MipsPreLegalizerCombiner, DEBUG_TYPE,
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"Combine Mips machine instrs before legalization", false,
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false)
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namespace llvm {
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FunctionPass *createMipsPreLegalizeCombiner() {
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return new MipsPreLegalizerCombiner();
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}
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} // end namespace llvm
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