c8a70f4c6e
In this PR, static-data-splitter pass finds out the local-linkage global
variables in {`.rodata`, `.data.rel.ro`, `bss`, `.data`} sections by
analyzing machine instruction operands, and aggregates their accesses
from code across functions.
A follow-up item is to analyze global variable initializers and count
for access from data.
* This limitation is demonstrated by `bss2` and `data3` in
`llvm/test/CodeGen/X86/global-variable-partition.ll`.
Some stats of static-data-splitter with this patch:
**section**|**bss**|**rodata**|**data**
:-----:|:-----:|:-----:|:-----:
hot-prefixed section coverage|99.75%|97.71%|91.30%
unlikely-prefixed section size percentage|67.94%|39.37%|63.10%
1. The coverage is defined as `#perf-sample-in-hot-prefixed <data>
section / #perf-sample in <data.*> section` for each <data> section.
* The perf command samples
`MEM_INST_RETIRED.ALL_LOADS:u:pinned:precise=2` events at a high
frequency (`perf -c 2251`) for 30 seconds. The profiled binary is built
as non-PIE so `data.rel.ro` coverage data is not available.
2. The unlikely-prefixed `<data>` section size percentage is defined as
`unlikely <data> section size / the sum size of <data>.* sections` for
each `<data>` section
150 lines
6.8 KiB
C++
150 lines
6.8 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/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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initializeAssignmentTrackingAnalysisPass(Registry);
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initializeAtomicExpandLegacyPass(Registry);
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initializeBasicBlockPathCloningPass(Registry);
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initializeBasicBlockSectionsPass(Registry);
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initializeBranchFolderLegacyPass(Registry);
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initializeBranchRelaxationPass(Registry);
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initializeBreakFalseDepsPass(Registry);
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initializeCallBrPreparePass(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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initializeCodeGenPrepareLegacyPassPass(Registry);
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initializeDeadMachineInstructionElimPass(Registry);
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initializeDebugifyMachineModulePass(Registry);
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initializeDetectDeadLanesLegacyPass(Registry);
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initializeDwarfEHPrepareLegacyPassPass(Registry);
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initializeEarlyIfConverterLegacyPass(Registry);
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initializeEarlyIfPredicatorPass(Registry);
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initializeEarlyMachineLICMPass(Registry);
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initializeEarlyTailDuplicateLegacyPass(Registry);
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initializeExpandLargeDivRemLegacyPassPass(Registry);
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initializeExpandFpLegacyPassPass(Registry);
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initializeExpandMemCmpLegacyPassPass(Registry);
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initializeExpandPostRALegacyPass(Registry);
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initializeFEntryInserterLegacyPass(Registry);
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initializeFinalizeISelPass(Registry);
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initializeFinalizeMachineBundlesPass(Registry);
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initializeFixupStatepointCallerSavedLegacyPass(Registry);
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initializeFuncletLayoutPass(Registry);
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initializeGCMachineCodeAnalysisPass(Registry);
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initializeGCModuleInfoPass(Registry);
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initializeHardwareLoopsLegacyPass(Registry);
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initializeIfConverterPass(Registry);
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initializeImplicitNullChecksPass(Registry);
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initializeIndirectBrExpandLegacyPassPass(Registry);
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initializeInitUndefPass(Registry);
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initializeInterleavedLoadCombinePass(Registry);
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initializeInterleavedAccessPass(Registry);
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initializeJMCInstrumenterPass(Registry);
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initializeLiveDebugValuesLegacyPass(Registry);
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initializeLiveDebugVariablesWrapperLegacyPass(Registry);
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initializeLiveIntervalsWrapperPassPass(Registry);
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initializeLiveRangeShrinkPass(Registry);
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initializeLiveStacksWrapperLegacyPass(Registry);
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initializeLiveVariablesWrapperPassPass(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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initializeMachineBlockFrequencyInfoWrapperPassPass(Registry);
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initializeMachineBlockPlacementLegacyPass(Registry);
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initializeMachineBlockPlacementStatsPass(Registry);
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initializeMachineCFGPrinterPass(Registry);
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initializeMachineCSELegacyPass(Registry);
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initializeMachineCombinerPass(Registry);
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initializeMachineCopyPropagationLegacyPass(Registry);
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initializeMachineCycleInfoPrinterLegacyPass(Registry);
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initializeMachineCycleInfoWrapperPassPass(Registry);
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initializeMachineDominatorTreeWrapperPassPass(Registry);
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initializeMachineFunctionPrinterPassPass(Registry);
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initializeMachineFunctionSplitterPass(Registry);
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initializeMachineLateInstrsCleanupLegacyPass(Registry);
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initializeMachineLICMPass(Registry);
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initializeMachineLoopInfoWrapperPassPass(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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initializeMachineSanitizerBinaryMetadataPass(Registry);
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initializeModuloScheduleTestPass(Registry);
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initializeMachinePostDominatorTreeWrapperPassPass(Registry);
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initializeMachineRegionInfoPassPass(Registry);
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initializeMachineSchedulerLegacyPass(Registry);
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initializeMachineSinkingLegacyPass(Registry);
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initializeMachineUniformityAnalysisPassPass(Registry);
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initializeMachineUniformityInfoPrinterPassPass(Registry);
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initializeMachineVerifierLegacyPassPass(Registry);
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initializeObjCARCContractLegacyPassPass(Registry);
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initializeOptimizePHIsLegacyPass(Registry);
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initializePEIPass(Registry);
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initializePHIEliminationPass(Registry);
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initializePatchableFunctionLegacyPass(Registry);
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initializePeepholeOptimizerLegacyPass(Registry);
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initializePostMachineSchedulerLegacyPass(Registry);
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initializePostRAHazardRecognizerPass(Registry);
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initializePostRAMachineSinkingPass(Registry);
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initializePostRASchedulerLegacyPass(Registry);
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initializePreISelIntrinsicLoweringLegacyPassPass(Registry);
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initializeProcessImplicitDefsPass(Registry);
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initializeRABasicPass(Registry);
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initializeRAGreedyLegacyPass(Registry);
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initializeRegAllocFastPass(Registry);
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initializeRegUsageInfoCollectorLegacyPass(Registry);
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initializeRegUsageInfoPropagationLegacyPass(Registry);
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initializeRegisterCoalescerLegacyPass(Registry);
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initializeRemoveLoadsIntoFakeUsesPass(Registry);
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initializeRemoveRedundantDebugValuesLegacyPass(Registry);
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initializeRenameIndependentSubregsLegacyPass(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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initializeSlotIndexesWrapperPassPass(Registry);
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initializeStackColoringLegacyPass(Registry);
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initializeStackFrameLayoutAnalysisPassPass(Registry);
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initializeStackMapLivenessPass(Registry);
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initializeStackProtectorPass(Registry);
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initializeStackSlotColoringLegacyPass(Registry);
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initializeStaticDataSplitterPass(Registry);
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initializeStaticDataAnnotatorPass(Registry);
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initializeStripDebugMachineModulePass(Registry);
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initializeTailDuplicateLegacyPass(Registry);
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initializeTargetPassConfigPass(Registry);
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initializeTwoAddressInstructionLegacyPassPass(Registry);
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initializeTypePromotionLegacyPass(Registry);
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initializeUnpackMachineBundlesPass(Registry);
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initializeUnreachableBlockElimLegacyPassPass(Registry);
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initializeUnreachableMachineBlockElimPass(Registry);
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initializeVirtRegMapWrapperLegacyPass(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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