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A new pass MachineLateInstrsCleanup is added to be run after PEI. This is a simple pass that removes redundant and identical instructions whenever found by scanning the MF once while keeping track of register definitions in a map. These instructions are typically immediate loads resulting from rematerialization, and address loads emitted by target in eliminateFrameInde(). This is enabled by default, but a target could easily disable it by means of 'disablePass(&MachineLateInstrsCleanupID);'. This late cleanup is naturally not "optimal" in removing instructions as it is done by looking at phys-regs, but still quite effective. It would be desirable to improve other parts of CodeGen and avoid these redundant instructions in the first place, but there are no ideas for this yet. Differential Revision: https://reviews.llvm.org/D123394 Reviewed By: RKSimon, foad, craig.topper, arsenm, asb
142 lines
6.0 KiB
C++
142 lines
6.0 KiB
C++
//===-- CodeGen.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 file implements the common initialization routines for the
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// CodeGen library.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm-c/Initialization.h"
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#include "llvm/InitializePasses.h"
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#include "llvm/PassRegistry.h"
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using namespace llvm;
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/// initializeCodeGen - Initialize all passes linked into the CodeGen library.
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void llvm::initializeCodeGen(PassRegistry &Registry) {
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initializeAtomicExpandPass(Registry);
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initializeBasicBlockSectionsPass(Registry);
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initializeBranchFolderPassPass(Registry);
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initializeBranchRelaxationPass(Registry);
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initializeCFGuardLongjmpPass(Registry);
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initializeCFIFixupPass(Registry);
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initializeCFIInstrInserterPass(Registry);
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initializeCheckDebugMachineModulePass(Registry);
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initializeCodeGenPreparePass(Registry);
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initializeDeadMachineInstructionElimPass(Registry);
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initializeDebugifyMachineModulePass(Registry);
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initializeDetectDeadLanesPass(Registry);
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initializeDwarfEHPrepareLegacyPassPass(Registry);
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initializeEarlyIfConverterPass(Registry);
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initializeEarlyIfPredicatorPass(Registry);
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initializeEarlyMachineLICMPass(Registry);
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initializeEarlyTailDuplicatePass(Registry);
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initializeExpandLargeDivRemLegacyPassPass(Registry);
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initializeExpandLargeFpConvertLegacyPassPass(Registry);
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initializeExpandMemCmpPassPass(Registry);
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initializeExpandPostRAPass(Registry);
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initializeFEntryInserterPass(Registry);
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initializeFinalizeISelPass(Registry);
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initializeFinalizeMachineBundlesPass(Registry);
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initializeFixupStatepointCallerSavedPass(Registry);
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initializeFuncletLayoutPass(Registry);
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initializeGCMachineCodeAnalysisPass(Registry);
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initializeGCModuleInfoPass(Registry);
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initializeHardwareLoopsPass(Registry);
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initializeIfConverterPass(Registry);
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initializeImplicitNullChecksPass(Registry);
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initializeIndirectBrExpandPassPass(Registry);
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initializeInterleavedLoadCombinePass(Registry);
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initializeInterleavedAccessPass(Registry);
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initializeJMCInstrumenterPass(Registry);
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initializeLiveDebugValuesPass(Registry);
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initializeLiveDebugVariablesPass(Registry);
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initializeLiveIntervalsPass(Registry);
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initializeLiveRangeShrinkPass(Registry);
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initializeLiveStacksPass(Registry);
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initializeLiveVariablesPass(Registry);
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initializeLocalStackSlotPassPass(Registry);
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initializeLowerGlobalDtorsLegacyPassPass(Registry);
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initializeLowerIntrinsicsPass(Registry);
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initializeMIRAddFSDiscriminatorsPass(Registry);
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initializeMIRCanonicalizerPass(Registry);
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initializeMIRNamerPass(Registry);
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initializeMIRProfileLoaderPassPass(Registry);
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initializeMachineBlockFrequencyInfoPass(Registry);
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initializeMachineBlockPlacementPass(Registry);
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initializeMachineBlockPlacementStatsPass(Registry);
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initializeMachineCFGPrinterPass(Registry);
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initializeMachineCSEPass(Registry);
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initializeMachineCombinerPass(Registry);
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initializeMachineCopyPropagationPass(Registry);
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initializeMachineCycleInfoPrinterPassPass(Registry);
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initializeMachineCycleInfoWrapperPassPass(Registry);
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initializeMachineDominatorTreePass(Registry);
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initializeMachineFunctionPrinterPassPass(Registry);
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initializeMachineLateInstrsCleanupPass(Registry);
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initializeMachineLICMPass(Registry);
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initializeMachineLoopInfoPass(Registry);
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initializeMachineModuleInfoWrapperPassPass(Registry);
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initializeMachineOptimizationRemarkEmitterPassPass(Registry);
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initializeMachineOutlinerPass(Registry);
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initializeMachinePipelinerPass(Registry);
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initializeModuloScheduleTestPass(Registry);
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initializeMachinePostDominatorTreePass(Registry);
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initializeMachineRegionInfoPassPass(Registry);
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initializeMachineSchedulerPass(Registry);
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initializeMachineSinkingPass(Registry);
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initializeMachineVerifierPassPass(Registry);
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initializeObjCARCContractLegacyPassPass(Registry);
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initializeOptimizePHIsPass(Registry);
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initializePEIPass(Registry);
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initializePHIEliminationPass(Registry);
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initializePatchableFunctionPass(Registry);
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initializePeepholeOptimizerPass(Registry);
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initializePostMachineSchedulerPass(Registry);
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initializePostRAHazardRecognizerPass(Registry);
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initializePostRAMachineSinkingPass(Registry);
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initializePostRASchedulerPass(Registry);
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initializePreISelIntrinsicLoweringLegacyPassPass(Registry);
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initializeProcessImplicitDefsPass(Registry);
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initializeRABasicPass(Registry);
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initializeRAGreedyPass(Registry);
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initializeRegAllocFastPass(Registry);
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initializeRegUsageInfoCollectorPass(Registry);
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initializeRegUsageInfoPropagationPass(Registry);
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initializeRegisterCoalescerPass(Registry);
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initializeRemoveRedundantDebugValuesPass(Registry);
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initializeRenameIndependentSubregsPass(Registry);
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initializeSafeStackLegacyPassPass(Registry);
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initializeSelectOptimizePass(Registry);
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initializeShadowStackGCLoweringPass(Registry);
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initializeShrinkWrapPass(Registry);
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initializeSjLjEHPreparePass(Registry);
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initializeSlotIndexesPass(Registry);
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initializeStackColoringPass(Registry);
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initializeStackMapLivenessPass(Registry);
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initializeStackProtectorPass(Registry);
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initializeStackSlotColoringPass(Registry);
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initializeStripDebugMachineModulePass(Registry);
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initializeTailDuplicatePass(Registry);
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initializeTargetPassConfigPass(Registry);
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initializeTwoAddressInstructionPassPass(Registry);
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initializeTypePromotionPass(Registry);
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initializeUnpackMachineBundlesPass(Registry);
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initializeUnreachableBlockElimLegacyPassPass(Registry);
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initializeUnreachableMachineBlockElimPass(Registry);
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initializeVirtRegMapPass(Registry);
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initializeVirtRegRewriterPass(Registry);
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initializeWasmEHPreparePass(Registry);
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initializeWinEHPreparePass(Registry);
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initializeXRayInstrumentationPass(Registry);
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}
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void LLVMInitializeCodeGen(LLVMPassRegistryRef R) {
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initializeCodeGen(*unwrap(R));
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}
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