3d08ade7bd
This patch is part of a set of patches that add an `-fextend-lifetimes` flag to clang, which extends the lifetimes of local variables and parameters for improved debuggability. In addition to that flag, the patch series adds a pragma to selectively disable `-fextend-lifetimes`, and an `-fextend-this-ptr` flag which functions as `-fextend-lifetimes` for this pointers only. All changes and tests in these patches were written by Wolfgang Pieb (@wolfy1961), while Stephen Tozer (@SLTozer) has handled review and merging. The extend lifetimes flag is intended to eventually be set on by `-Og`, as discussed in the RFC here: https://discourse.llvm.org/t/rfc-redefine-og-o1-and-add-a-new-level-of-og/72850 This patch implements a new intrinsic instruction in LLVM, `llvm.fake.use` in IR and `FAKE_USE` in MIR, that takes a single operand and has no effect other than "using" its operand, to ensure that its operand remains live until after the fake use. This patch does not emit fake uses anywhere; the next patch in this sequence causes them to be emitted from the clang frontend, such that for each variable (or this) a fake.use operand is inserted at the end of that variable's scope, using that variable's value. This patch covers everything post-frontend, which is largely just the basic plumbing for a new intrinsic/instruction, along with a few steps to preserve the fake uses through optimizations (such as moving them ahead of a tail call or translating them through SROA). Co-authored-by: Stephen Tozer <stephen.tozer@sony.com>
147 lines
6.5 KiB
C++
147 lines
6.5 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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initializeBranchFolderPassPass(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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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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initializeExpandMemCmpLegacyPassPass(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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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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initializeLiveDebugValuesPass(Registry);
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initializeLiveDebugVariablesPass(Registry);
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initializeLiveIntervalsWrapperPassPass(Registry);
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initializeLiveRangeShrinkPass(Registry);
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initializeLiveStacksPass(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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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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initializeMachineDominatorTreeWrapperPassPass(Registry);
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initializeMachineFunctionPrinterPassPass(Registry);
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initializeMachineLateInstrsCleanupPass(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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initializeMachineSchedulerPass(Registry);
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initializeMachineSinkingPass(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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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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initializeRemoveLoadsIntoFakeUsesPass(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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initializeSlotIndexesWrapperPassPass(Registry);
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initializeStackColoringPass(Registry);
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initializeStackFrameLayoutAnalysisPassPass(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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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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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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