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llvm-mirror/lib/Passes/PassBuilder.cpp
Sjoerd Meijer 6a49dbd1a3 Function Specialization Pass 
This adds a function specialization pass to LLVM. Constant parameters
like function pointers and constant globals are propagated to the callee by
specializing the function.

This is a first version with a number of limitations:
- The pass is off by default, so needs to be enabled on the command line,
- It does not handle specialization of recursive functions,
- It does not yet handle constants and constant ranges,
- Only 1 argument per function is specialised,
- The cost-model could be further looked into, and perhaps related,
- We are not yet caching analysis results.

This is based on earlier work by Matthew Simpson (D36432) and Vinay Madhusudan.
More recently this was also discussed on the list, see:

https://lists.llvm.org/pipermail/llvm-dev/2021-March/149380.html.

The motivation for this work is that function specialisation often comes up as
a reason for performance differences of generated code between LLVM and GCC,
which has this enabled by default from optimisation level -O3 and up. And while
this certainly helps a few cpu benchmark cases, this also triggers in real
world codes and is thus a generally useful transformation to have in LLVM.

Function specialisation has great potential to increase compile-times and
code-size.  The summary from some investigations with this patch is:
- Compile-time increases for short compile jobs is high relatively, but the
  increase in absolute numbers still low.
- For longer compile-jobs, the extra compile time is around 1%, and very much
  in line with GCC.
- It is difficult to blame one thing for compile-time increases: it looks like
  everywhere a little bit more time is spent processing more functions and
  instructions.
- But the function specialisation pass itself is not very expensive; it doesn't
  show up very high in the profile of the optimisation passes.

The goal of this work is to reach parity with GCC which means that eventually
we would like to get this enabled by default. But first we would like to address
some of the limitations before that.

Differential Revision: https://reviews.llvm.org/D93838
2021-06-11 09:11:29 +01:00

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//===- Parsing, selection, and construction of pass pipelines -------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
/// \file
///
/// This file provides the implementation of the PassBuilder based on our
/// static pass registry as well as related functionality. It also provides
/// helpers to aid in analyzing, debugging, and testing passes and pass
/// pipelines.
///
//===----------------------------------------------------------------------===//
#include "llvm/Passes/PassBuilder.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Analysis/AliasAnalysisEvaluator.h"
#include "llvm/Analysis/AliasSetTracker.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/BasicAliasAnalysis.h"
#include "llvm/Analysis/BlockFrequencyInfo.h"
#include "llvm/Analysis/BranchProbabilityInfo.h"
#include "llvm/Analysis/CFGPrinter.h"
#include "llvm/Analysis/CFLAndersAliasAnalysis.h"
#include "llvm/Analysis/CFLSteensAliasAnalysis.h"
#include "llvm/Analysis/CGSCCPassManager.h"
#include "llvm/Analysis/CallGraph.h"
#include "llvm/Analysis/DDG.h"
#include "llvm/Analysis/DDGPrinter.h"
#include "llvm/Analysis/Delinearization.h"
#include "llvm/Analysis/DemandedBits.h"
#include "llvm/Analysis/DependenceAnalysis.h"
#include "llvm/Analysis/DivergenceAnalysis.h"
#include "llvm/Analysis/DominanceFrontier.h"
#include "llvm/Analysis/FunctionPropertiesAnalysis.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/IRSimilarityIdentifier.h"
#include "llvm/Analysis/IVUsers.h"
#include "llvm/Analysis/InlineAdvisor.h"
#include "llvm/Analysis/InlineSizeEstimatorAnalysis.h"
#include "llvm/Analysis/InstCount.h"
#include "llvm/Analysis/LazyCallGraph.h"
#include "llvm/Analysis/LazyValueInfo.h"
#include "llvm/Analysis/Lint.h"
#include "llvm/Analysis/LoopAccessAnalysis.h"
#include "llvm/Analysis/LoopCacheAnalysis.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/LoopNestAnalysis.h"
#include "llvm/Analysis/MemDerefPrinter.h"
#include "llvm/Analysis/MemoryDependenceAnalysis.h"
#include "llvm/Analysis/MemorySSA.h"
#include "llvm/Analysis/ModuleDebugInfoPrinter.h"
#include "llvm/Analysis/ModuleSummaryAnalysis.h"
#include "llvm/Analysis/MustExecute.h"
#include "llvm/Analysis/ObjCARCAliasAnalysis.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/Analysis/PhiValues.h"
#include "llvm/Analysis/PostDominators.h"
#include "llvm/Analysis/ProfileSummaryInfo.h"
#include "llvm/Analysis/RegionInfo.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Analysis/ScalarEvolutionAliasAnalysis.h"
#include "llvm/Analysis/ScopedNoAliasAA.h"
#include "llvm/Analysis/StackLifetime.h"
#include "llvm/Analysis/StackSafetyAnalysis.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Analysis/TypeBasedAliasAnalysis.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/IRPrintingPasses.h"
#include "llvm/IR/PassManager.h"
#include "llvm/IR/PrintPasses.h"
#include "llvm/IR/SafepointIRVerifier.h"
#include "llvm/IR/Verifier.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/Regex.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/AggressiveInstCombine/AggressiveInstCombine.h"
#include "llvm/Transforms/Coroutines/CoroCleanup.h"
#include "llvm/Transforms/Coroutines/CoroEarly.h"
#include "llvm/Transforms/Coroutines/CoroElide.h"
#include "llvm/Transforms/Coroutines/CoroSplit.h"
#include "llvm/Transforms/IPO/AlwaysInliner.h"
#include "llvm/Transforms/IPO/Annotation2Metadata.h"
#include "llvm/Transforms/IPO/ArgumentPromotion.h"
#include "llvm/Transforms/IPO/Attributor.h"
#include "llvm/Transforms/IPO/BlockExtractor.h"
#include "llvm/Transforms/IPO/CalledValuePropagation.h"
#include "llvm/Transforms/IPO/ConstantMerge.h"
#include "llvm/Transforms/IPO/CrossDSOCFI.h"
#include "llvm/Transforms/IPO/DeadArgumentElimination.h"
#include "llvm/Transforms/IPO/ElimAvailExtern.h"
#include "llvm/Transforms/IPO/ForceFunctionAttrs.h"
#include "llvm/Transforms/IPO/FunctionAttrs.h"
#include "llvm/Transforms/IPO/FunctionImport.h"
#include "llvm/Transforms/IPO/GlobalDCE.h"
#include "llvm/Transforms/IPO/GlobalOpt.h"
#include "llvm/Transforms/IPO/GlobalSplit.h"
#include "llvm/Transforms/IPO/HotColdSplitting.h"
#include "llvm/Transforms/IPO/IROutliner.h"
#include "llvm/Transforms/IPO/InferFunctionAttrs.h"
#include "llvm/Transforms/IPO/Inliner.h"
#include "llvm/Transforms/IPO/Internalize.h"
#include "llvm/Transforms/IPO/LoopExtractor.h"
#include "llvm/Transforms/IPO/LowerTypeTests.h"
#include "llvm/Transforms/IPO/MergeFunctions.h"
#include "llvm/Transforms/IPO/OpenMPOpt.h"
#include "llvm/Transforms/IPO/PartialInlining.h"
#include "llvm/Transforms/IPO/SCCP.h"
#include "llvm/Transforms/IPO/SampleProfile.h"
#include "llvm/Transforms/IPO/SampleProfileProbe.h"
#include "llvm/Transforms/IPO/StripDeadPrototypes.h"
#include "llvm/Transforms/IPO/StripSymbols.h"
#include "llvm/Transforms/IPO/SyntheticCountsPropagation.h"
#include "llvm/Transforms/IPO/WholeProgramDevirt.h"
#include "llvm/Transforms/InstCombine/InstCombine.h"
#include "llvm/Transforms/Instrumentation.h"
#include "llvm/Transforms/Instrumentation/AddressSanitizer.h"
#include "llvm/Transforms/Instrumentation/BoundsChecking.h"
#include "llvm/Transforms/Instrumentation/CGProfile.h"
#include "llvm/Transforms/Instrumentation/ControlHeightReduction.h"
#include "llvm/Transforms/Instrumentation/DataFlowSanitizer.h"
#include "llvm/Transforms/Instrumentation/GCOVProfiler.h"
#include "llvm/Transforms/Instrumentation/HWAddressSanitizer.h"
#include "llvm/Transforms/Instrumentation/InstrOrderFile.h"
#include "llvm/Transforms/Instrumentation/InstrProfiling.h"
#include "llvm/Transforms/Instrumentation/MemProfiler.h"
#include "llvm/Transforms/Instrumentation/MemorySanitizer.h"
#include "llvm/Transforms/Instrumentation/PGOInstrumentation.h"
#include "llvm/Transforms/Instrumentation/PoisonChecking.h"
#include "llvm/Transforms/Instrumentation/SanitizerCoverage.h"
#include "llvm/Transforms/Instrumentation/ThreadSanitizer.h"
#include "llvm/Transforms/ObjCARC.h"
#include "llvm/Transforms/Scalar/ADCE.h"
#include "llvm/Transforms/Scalar/AlignmentFromAssumptions.h"
#include "llvm/Transforms/Scalar/AnnotationRemarks.h"
#include "llvm/Transforms/Scalar/BDCE.h"
#include "llvm/Transforms/Scalar/CallSiteSplitting.h"
#include "llvm/Transforms/Scalar/ConstantHoisting.h"
#include "llvm/Transforms/Scalar/ConstraintElimination.h"
#include "llvm/Transforms/Scalar/CorrelatedValuePropagation.h"
#include "llvm/Transforms/Scalar/DCE.h"
#include "llvm/Transforms/Scalar/DeadStoreElimination.h"
#include "llvm/Transforms/Scalar/DivRemPairs.h"
#include "llvm/Transforms/Scalar/EarlyCSE.h"
#include "llvm/Transforms/Scalar/Float2Int.h"
#include "llvm/Transforms/Scalar/GVN.h"
#include "llvm/Transforms/Scalar/GuardWidening.h"
#include "llvm/Transforms/Scalar/IVUsersPrinter.h"
#include "llvm/Transforms/Scalar/IndVarSimplify.h"
#include "llvm/Transforms/Scalar/InductiveRangeCheckElimination.h"
#include "llvm/Transforms/Scalar/InferAddressSpaces.h"
#include "llvm/Transforms/Scalar/InstSimplifyPass.h"
#include "llvm/Transforms/Scalar/JumpThreading.h"
#include "llvm/Transforms/Scalar/LICM.h"
#include "llvm/Transforms/Scalar/LoopAccessAnalysisPrinter.h"
#include "llvm/Transforms/Scalar/LoopBoundSplit.h"
#include "llvm/Transforms/Scalar/LoopDataPrefetch.h"
#include "llvm/Transforms/Scalar/LoopDeletion.h"
#include "llvm/Transforms/Scalar/LoopDistribute.h"
#include "llvm/Transforms/Scalar/LoopFlatten.h"
#include "llvm/Transforms/Scalar/LoopFuse.h"
#include "llvm/Transforms/Scalar/LoopIdiomRecognize.h"
#include "llvm/Transforms/Scalar/LoopInstSimplify.h"
#include "llvm/Transforms/Scalar/LoopInterchange.h"
#include "llvm/Transforms/Scalar/LoopLoadElimination.h"
#include "llvm/Transforms/Scalar/LoopPassManager.h"
#include "llvm/Transforms/Scalar/LoopPredication.h"
#include "llvm/Transforms/Scalar/LoopReroll.h"
#include "llvm/Transforms/Scalar/LoopRotation.h"
#include "llvm/Transforms/Scalar/LoopSimplifyCFG.h"
#include "llvm/Transforms/Scalar/LoopSink.h"
#include "llvm/Transforms/Scalar/LoopStrengthReduce.h"
#include "llvm/Transforms/Scalar/LoopUnrollAndJamPass.h"
#include "llvm/Transforms/Scalar/LoopUnrollPass.h"
#include "llvm/Transforms/Scalar/LoopVersioningLICM.h"
#include "llvm/Transforms/Scalar/LowerAtomic.h"
#include "llvm/Transforms/Scalar/LowerConstantIntrinsics.h"
#include "llvm/Transforms/Scalar/LowerExpectIntrinsic.h"
#include "llvm/Transforms/Scalar/LowerGuardIntrinsic.h"
#include "llvm/Transforms/Scalar/LowerMatrixIntrinsics.h"
#include "llvm/Transforms/Scalar/LowerWidenableCondition.h"
#include "llvm/Transforms/Scalar/MakeGuardsExplicit.h"
#include "llvm/Transforms/Scalar/MemCpyOptimizer.h"
#include "llvm/Transforms/Scalar/MergeICmps.h"
#include "llvm/Transforms/Scalar/MergedLoadStoreMotion.h"
#include "llvm/Transforms/Scalar/NaryReassociate.h"
#include "llvm/Transforms/Scalar/NewGVN.h"
#include "llvm/Transforms/Scalar/PartiallyInlineLibCalls.h"
#include "llvm/Transforms/Scalar/Reassociate.h"
#include "llvm/Transforms/Scalar/Reg2Mem.h"
#include "llvm/Transforms/Scalar/RewriteStatepointsForGC.h"
#include "llvm/Transforms/Scalar/SCCP.h"
#include "llvm/Transforms/Scalar/SROA.h"
#include "llvm/Transforms/Scalar/ScalarizeMaskedMemIntrin.h"
#include "llvm/Transforms/Scalar/Scalarizer.h"
#include "llvm/Transforms/Scalar/SeparateConstOffsetFromGEP.h"
#include "llvm/Transforms/Scalar/SimpleLoopUnswitch.h"
#include "llvm/Transforms/Scalar/SimplifyCFG.h"
#include "llvm/Transforms/Scalar/Sink.h"
#include "llvm/Transforms/Scalar/SpeculateAroundPHIs.h"
#include "llvm/Transforms/Scalar/SpeculativeExecution.h"
#include "llvm/Transforms/Scalar/StraightLineStrengthReduce.h"
#include "llvm/Transforms/Scalar/StructurizeCFG.h"
#include "llvm/Transforms/Scalar/TailRecursionElimination.h"
#include "llvm/Transforms/Scalar/WarnMissedTransforms.h"
#include "llvm/Transforms/Utils/AddDiscriminators.h"
#include "llvm/Transforms/Utils/AssumeBundleBuilder.h"
#include "llvm/Transforms/Utils/BreakCriticalEdges.h"
#include "llvm/Transforms/Utils/CanonicalizeAliases.h"
#include "llvm/Transforms/Utils/CanonicalizeFreezeInLoops.h"
#include "llvm/Transforms/Utils/EntryExitInstrumenter.h"
#include "llvm/Transforms/Utils/FixIrreducible.h"
#include "llvm/Transforms/Utils/HelloWorld.h"
#include "llvm/Transforms/Utils/InjectTLIMappings.h"
#include "llvm/Transforms/Utils/InstructionNamer.h"
#include "llvm/Transforms/Utils/LCSSA.h"
#include "llvm/Transforms/Utils/LibCallsShrinkWrap.h"
#include "llvm/Transforms/Utils/LoopSimplify.h"
#include "llvm/Transforms/Utils/LoopVersioning.h"
#include "llvm/Transforms/Utils/LowerInvoke.h"
#include "llvm/Transforms/Utils/LowerSwitch.h"
#include "llvm/Transforms/Utils/Mem2Reg.h"
#include "llvm/Transforms/Utils/MetaRenamer.h"
#include "llvm/Transforms/Utils/NameAnonGlobals.h"
#include "llvm/Transforms/Utils/RelLookupTableConverter.h"
#include "llvm/Transforms/Utils/StripGCRelocates.h"
#include "llvm/Transforms/Utils/StripNonLineTableDebugInfo.h"
#include "llvm/Transforms/Utils/SymbolRewriter.h"
#include "llvm/Transforms/Utils/UnifyFunctionExitNodes.h"
#include "llvm/Transforms/Utils/UnifyLoopExits.h"
#include "llvm/Transforms/Vectorize/LoadStoreVectorizer.h"
#include "llvm/Transforms/Vectorize/LoopVectorize.h"
#include "llvm/Transforms/Vectorize/SLPVectorizer.h"
#include "llvm/Transforms/Vectorize/VectorCombine.h"
using namespace llvm;
static cl::opt<InliningAdvisorMode> UseInlineAdvisor(
"enable-ml-inliner", cl::init(InliningAdvisorMode::Default), cl::Hidden,
cl::desc("Enable ML policy for inliner. Currently trained for -Oz only"),
cl::values(clEnumValN(InliningAdvisorMode::Default, "default",
"Heuristics-based inliner version."),
clEnumValN(InliningAdvisorMode::Development, "development",
"Use development mode (runtime-loadable model)."),
clEnumValN(InliningAdvisorMode::Release, "release",
"Use release mode (AOT-compiled model).")));
static cl::opt<bool> EnableSyntheticCounts(
"enable-npm-synthetic-counts", cl::init(false), cl::Hidden, cl::ZeroOrMore,
cl::desc("Run synthetic function entry count generation "
"pass"));
static const Regex DefaultAliasRegex(
"^(default|thinlto-pre-link|thinlto|lto-pre-link|lto)<(O[0123sz])>$");
/// Flag to enable inline deferral during PGO.
static cl::opt<bool>
EnablePGOInlineDeferral("enable-npm-pgo-inline-deferral", cl::init(true),
cl::Hidden,
cl::desc("Enable inline deferral during PGO"));
static cl::opt<bool> EnableMemProfiler("enable-mem-prof", cl::init(false),
cl::Hidden, cl::ZeroOrMore,
cl::desc("Enable memory profiler"));
static cl::opt<bool> PerformMandatoryInliningsFirst(
"mandatory-inlining-first", cl::init(true), cl::Hidden, cl::ZeroOrMore,
cl::desc("Perform mandatory inlinings module-wide, before performing "
"inlining."));
static cl::opt<bool> EnableO3NonTrivialUnswitching(
"enable-npm-O3-nontrivial-unswitch", cl::init(true), cl::Hidden,
cl::ZeroOrMore, cl::desc("Enable non-trivial loop unswitching for -O3"));
PipelineTuningOptions::PipelineTuningOptions() {
LoopInterleaving = true;
LoopVectorization = true;
SLPVectorization = false;
LoopUnrolling = true;
ForgetAllSCEVInLoopUnroll = ForgetSCEVInLoopUnroll;
Coroutines = false;
LicmMssaOptCap = SetLicmMssaOptCap;
LicmMssaNoAccForPromotionCap = SetLicmMssaNoAccForPromotionCap;
CallGraphProfile = true;
MergeFunctions = false;
}
namespace llvm {
extern cl::opt<unsigned> MaxDevirtIterations;
extern cl::opt<bool> EnableConstraintElimination;
extern cl::opt<bool> EnableFunctionSpecialization;
extern cl::opt<bool> EnableGVNHoist;
extern cl::opt<bool> EnableGVNSink;
extern cl::opt<bool> EnableHotColdSplit;
extern cl::opt<bool> EnableIROutliner;
extern cl::opt<bool> EnableOrderFileInstrumentation;
extern cl::opt<bool> EnableCHR;
extern cl::opt<bool> EnableLoopInterchange;
extern cl::opt<bool> EnableUnrollAndJam;
extern cl::opt<bool> EnableLoopFlatten;
extern cl::opt<bool> RunNewGVN;
extern cl::opt<bool> RunPartialInlining;
extern cl::opt<bool> ExtraVectorizerPasses;
extern cl::opt<bool> FlattenedProfileUsed;
extern cl::opt<AttributorRunOption> AttributorRun;
extern cl::opt<bool> EnableKnowledgeRetention;
extern cl::opt<bool> EnableMatrix;
extern cl::opt<bool> DisablePreInliner;
extern cl::opt<int> PreInlineThreshold;
} // namespace llvm
const PassBuilder::OptimizationLevel PassBuilder::OptimizationLevel::O0 = {
/*SpeedLevel*/ 0,
/*SizeLevel*/ 0};
const PassBuilder::OptimizationLevel PassBuilder::OptimizationLevel::O1 = {
/*SpeedLevel*/ 1,
/*SizeLevel*/ 0};
const PassBuilder::OptimizationLevel PassBuilder::OptimizationLevel::O2 = {
/*SpeedLevel*/ 2,
/*SizeLevel*/ 0};
const PassBuilder::OptimizationLevel PassBuilder::OptimizationLevel::O3 = {
/*SpeedLevel*/ 3,
/*SizeLevel*/ 0};
const PassBuilder::OptimizationLevel PassBuilder::OptimizationLevel::Os = {
/*SpeedLevel*/ 2,
/*SizeLevel*/ 1};
const PassBuilder::OptimizationLevel PassBuilder::OptimizationLevel::Oz = {
/*SpeedLevel*/ 2,
/*SizeLevel*/ 2};
namespace {
// The following passes/analyses have custom names, otherwise their name will
// include `(anonymous namespace)`. These are special since they are only for
// testing purposes and don't live in a header file.
/// No-op module pass which does nothing.
struct NoOpModulePass : PassInfoMixin<NoOpModulePass> {
PreservedAnalyses run(Module &M, ModuleAnalysisManager &) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpModulePass"; }
};
/// No-op module analysis.
class NoOpModuleAnalysis : public AnalysisInfoMixin<NoOpModuleAnalysis> {
friend AnalysisInfoMixin<NoOpModuleAnalysis>;
static AnalysisKey Key;
public:
struct Result {};
Result run(Module &, ModuleAnalysisManager &) { return Result(); }
static StringRef name() { return "NoOpModuleAnalysis"; }
};
/// No-op CGSCC pass which does nothing.
struct NoOpCGSCCPass : PassInfoMixin<NoOpCGSCCPass> {
PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &,
LazyCallGraph &, CGSCCUpdateResult &UR) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpCGSCCPass"; }
};
/// No-op CGSCC analysis.
class NoOpCGSCCAnalysis : public AnalysisInfoMixin<NoOpCGSCCAnalysis> {
friend AnalysisInfoMixin<NoOpCGSCCAnalysis>;
static AnalysisKey Key;
public:
struct Result {};
Result run(LazyCallGraph::SCC &, CGSCCAnalysisManager &, LazyCallGraph &G) {
return Result();
}
static StringRef name() { return "NoOpCGSCCAnalysis"; }
};
/// No-op function pass which does nothing.
struct NoOpFunctionPass : PassInfoMixin<NoOpFunctionPass> {
PreservedAnalyses run(Function &F, FunctionAnalysisManager &) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpFunctionPass"; }
};
/// No-op function analysis.
class NoOpFunctionAnalysis : public AnalysisInfoMixin<NoOpFunctionAnalysis> {
friend AnalysisInfoMixin<NoOpFunctionAnalysis>;
static AnalysisKey Key;
public:
struct Result {};
Result run(Function &, FunctionAnalysisManager &) { return Result(); }
static StringRef name() { return "NoOpFunctionAnalysis"; }
};
/// No-op loop pass which does nothing.
struct NoOpLoopPass : PassInfoMixin<NoOpLoopPass> {
PreservedAnalyses run(Loop &L, LoopAnalysisManager &,
LoopStandardAnalysisResults &, LPMUpdater &) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpLoopPass"; }
};
/// No-op loop analysis.
class NoOpLoopAnalysis : public AnalysisInfoMixin<NoOpLoopAnalysis> {
friend AnalysisInfoMixin<NoOpLoopAnalysis>;
static AnalysisKey Key;
public:
struct Result {};
Result run(Loop &, LoopAnalysisManager &, LoopStandardAnalysisResults &) {
return Result();
}
static StringRef name() { return "NoOpLoopAnalysis"; }
};
AnalysisKey NoOpModuleAnalysis::Key;
AnalysisKey NoOpCGSCCAnalysis::Key;
AnalysisKey NoOpFunctionAnalysis::Key;
AnalysisKey NoOpLoopAnalysis::Key;
/// Whether or not we should populate a PassInstrumentationCallbacks's class to
/// pass name map.
///
/// This is for optimization purposes so we don't populate it if we never use
/// it. This should be updated if new pass instrumentation wants to use the map.
/// We currently only use this for --print-before/after.
bool shouldPopulateClassToPassNames() {
return !printBeforePasses().empty() || !printAfterPasses().empty();
}
} // namespace
PassBuilder::PassBuilder(TargetMachine *TM, PipelineTuningOptions PTO,
Optional<PGOOptions> PGOOpt,
PassInstrumentationCallbacks *PIC)
: TM(TM), PTO(PTO), PGOOpt(PGOOpt), PIC(PIC) {
if (TM)
TM->registerPassBuilderCallbacks(*this);
if (PIC && shouldPopulateClassToPassNames()) {
#define MODULE_PASS(NAME, CREATE_PASS) \
PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
#define FUNCTION_PASS(NAME, CREATE_PASS) \
PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
#define LOOP_PASS(NAME, CREATE_PASS) \
PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
#define LOOP_ANALYSIS(NAME, CREATE_PASS) \
PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
#define CGSCC_PASS(NAME, CREATE_PASS) \
PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
#define CGSCC_ANALYSIS(NAME, CREATE_PASS) \
PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
#include "PassRegistry.def"
}
}
void PassBuilder::invokePeepholeEPCallbacks(
FunctionPassManager &FPM, PassBuilder::OptimizationLevel Level) {
for (auto &C : PeepholeEPCallbacks)
C(FPM, Level);
}
void PassBuilder::registerModuleAnalyses(ModuleAnalysisManager &MAM) {
#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
MAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
for (auto &C : ModuleAnalysisRegistrationCallbacks)
C(MAM);
}
void PassBuilder::registerCGSCCAnalyses(CGSCCAnalysisManager &CGAM) {
#define CGSCC_ANALYSIS(NAME, CREATE_PASS) \
CGAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
for (auto &C : CGSCCAnalysisRegistrationCallbacks)
C(CGAM);
}
void PassBuilder::registerFunctionAnalyses(FunctionAnalysisManager &FAM) {
#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
FAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
for (auto &C : FunctionAnalysisRegistrationCallbacks)
C(FAM);
}
void PassBuilder::registerLoopAnalyses(LoopAnalysisManager &LAM) {
#define LOOP_ANALYSIS(NAME, CREATE_PASS) \
LAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
for (auto &C : LoopAnalysisRegistrationCallbacks)
C(LAM);
}
// Helper to add AnnotationRemarksPass.
static void addAnnotationRemarksPass(ModulePassManager &MPM) {
FunctionPassManager FPM;
FPM.addPass(AnnotationRemarksPass());
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
}
// Helper to check if the current compilation phase is preparing for LTO
static bool isLTOPreLink(ThinOrFullLTOPhase Phase) {
return Phase == ThinOrFullLTOPhase::ThinLTOPreLink ||
Phase == ThinOrFullLTOPhase::FullLTOPreLink;
}
// TODO: Investigate the cost/benefit of tail call elimination on debugging.
FunctionPassManager
PassBuilder::buildO1FunctionSimplificationPipeline(OptimizationLevel Level,
ThinOrFullLTOPhase Phase) {
FunctionPassManager FPM;
// Form SSA out of local memory accesses after breaking apart aggregates into
// scalars.
FPM.addPass(SROA());
// Catch trivial redundancies
FPM.addPass(EarlyCSEPass(true /* Enable mem-ssa. */));
// Hoisting of scalars and load expressions.
FPM.addPass(SimplifyCFGPass());
FPM.addPass(InstCombinePass());
FPM.addPass(LibCallsShrinkWrapPass());
invokePeepholeEPCallbacks(FPM, Level);
FPM.addPass(SimplifyCFGPass());
// Form canonically associated expression trees, and simplify the trees using
// basic mathematical properties. For example, this will form (nearly)
// minimal multiplication trees.
FPM.addPass(ReassociatePass());
// Add the primary loop simplification pipeline.
// FIXME: Currently this is split into two loop pass pipelines because we run
// some function passes in between them. These can and should be removed
// and/or replaced by scheduling the loop pass equivalents in the correct
// positions. But those equivalent passes aren't powerful enough yet.
// Specifically, `SimplifyCFGPass` and `InstCombinePass` are currently still
// used. We have `LoopSimplifyCFGPass` which isn't yet powerful enough yet to
// fully replace `SimplifyCFGPass`, and the closest to the other we have is
// `LoopInstSimplify`.
LoopPassManager LPM1, LPM2;
// Simplify the loop body. We do this initially to clean up after other loop
// passes run, either when iterating on a loop or on inner loops with
// implications on the outer loop.
LPM1.addPass(LoopInstSimplifyPass());
LPM1.addPass(LoopSimplifyCFGPass());
// Try to remove as much code from the loop header as possible,
// to reduce amount of IR that will have to be duplicated.
// TODO: Investigate promotion cap for O1.
LPM1.addPass(LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap));
LPM1.addPass(LoopRotatePass(/* Disable header duplication */ true,
isLTOPreLink(Phase)));
// TODO: Investigate promotion cap for O1.
LPM1.addPass(LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap));
LPM1.addPass(SimpleLoopUnswitchPass());
LPM2.addPass(LoopIdiomRecognizePass());
LPM2.addPass(IndVarSimplifyPass());
for (auto &C : LateLoopOptimizationsEPCallbacks)
C(LPM2, Level);
LPM2.addPass(LoopDeletionPass());
if (EnableLoopInterchange)
LPM2.addPass(LoopInterchangePass());
// Do not enable unrolling in PreLinkThinLTO phase during sample PGO
// because it changes IR to makes profile annotation in back compile
// inaccurate. The normal unroller doesn't pay attention to forced full unroll
// attributes so we need to make sure and allow the full unroll pass to pay
// attention to it.
if (Phase != ThinOrFullLTOPhase::ThinLTOPreLink || !PGOOpt ||
PGOOpt->Action != PGOOptions::SampleUse)
LPM2.addPass(LoopFullUnrollPass(Level.getSpeedupLevel(),
/* OnlyWhenForced= */ !PTO.LoopUnrolling,
PTO.ForgetAllSCEVInLoopUnroll));
for (auto &C : LoopOptimizerEndEPCallbacks)
C(LPM2, Level);
// We provide the opt remark emitter pass for LICM to use. We only need to do
// this once as it is immutable.
FPM.addPass(
RequireAnalysisPass<OptimizationRemarkEmitterAnalysis, Function>());
FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM1),
EnableMSSALoopDependency,
/*UseBlockFrequencyInfo=*/true));
FPM.addPass(SimplifyCFGPass());
FPM.addPass(InstCombinePass());
if (EnableLoopFlatten)
FPM.addPass(createFunctionToLoopPassAdaptor(LoopFlattenPass()));
// The loop passes in LPM2 (LoopFullUnrollPass) do not preserve MemorySSA.
// *All* loop passes must preserve it, in order to be able to use it.
FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM2),
/*UseMemorySSA=*/false,
/*UseBlockFrequencyInfo=*/false));
// Delete small array after loop unroll.
FPM.addPass(SROA());
// Specially optimize memory movement as it doesn't look like dataflow in SSA.
FPM.addPass(MemCpyOptPass());
// Sparse conditional constant propagation.
// FIXME: It isn't clear why we do this *after* loop passes rather than
// before...
FPM.addPass(SCCPPass());
// Delete dead bit computations (instcombine runs after to fold away the dead
// computations, and then ADCE will run later to exploit any new DCE
// opportunities that creates).
FPM.addPass(BDCEPass());
// Run instcombine after redundancy and dead bit elimination to exploit
// opportunities opened up by them.
FPM.addPass(InstCombinePass());
invokePeepholeEPCallbacks(FPM, Level);
if (PTO.Coroutines)
FPM.addPass(CoroElidePass());
for (auto &C : ScalarOptimizerLateEPCallbacks)
C(FPM, Level);
// Finally, do an expensive DCE pass to catch all the dead code exposed by
// the simplifications and basic cleanup after all the simplifications.
// TODO: Investigate if this is too expensive.
FPM.addPass(ADCEPass());
FPM.addPass(SimplifyCFGPass());
FPM.addPass(InstCombinePass());
invokePeepholeEPCallbacks(FPM, Level);
return FPM;
}
FunctionPassManager
PassBuilder::buildFunctionSimplificationPipeline(OptimizationLevel Level,
ThinOrFullLTOPhase Phase) {
assert(Level != OptimizationLevel::O0 && "Must request optimizations!");
// The O1 pipeline has a separate pipeline creation function to simplify
// construction readability.
if (Level.getSpeedupLevel() == 1)
return buildO1FunctionSimplificationPipeline(Level, Phase);
FunctionPassManager FPM;
// Form SSA out of local memory accesses after breaking apart aggregates into
// scalars.
FPM.addPass(SROA());
// Catch trivial redundancies
FPM.addPass(EarlyCSEPass(true /* Enable mem-ssa. */));
if (EnableKnowledgeRetention)
FPM.addPass(AssumeSimplifyPass());
// Hoisting of scalars and load expressions.
if (EnableGVNHoist)
FPM.addPass(GVNHoistPass());
// Global value numbering based sinking.
if (EnableGVNSink) {
FPM.addPass(GVNSinkPass());
FPM.addPass(SimplifyCFGPass());
}
if (EnableConstraintElimination)
FPM.addPass(ConstraintEliminationPass());
// Speculative execution if the target has divergent branches; otherwise nop.
FPM.addPass(SpeculativeExecutionPass(/* OnlyIfDivergentTarget =*/true));
// Optimize based on known information about branches, and cleanup afterward.
FPM.addPass(JumpThreadingPass());
FPM.addPass(CorrelatedValuePropagationPass());
FPM.addPass(SimplifyCFGPass());
if (Level == OptimizationLevel::O3)
FPM.addPass(AggressiveInstCombinePass());
FPM.addPass(InstCombinePass());
if (!Level.isOptimizingForSize())
FPM.addPass(LibCallsShrinkWrapPass());
invokePeepholeEPCallbacks(FPM, Level);
// For PGO use pipeline, try to optimize memory intrinsics such as memcpy
// using the size value profile. Don't perform this when optimizing for size.
if (PGOOpt && PGOOpt->Action == PGOOptions::IRUse &&
!Level.isOptimizingForSize())
FPM.addPass(PGOMemOPSizeOpt());
FPM.addPass(TailCallElimPass());
FPM.addPass(SimplifyCFGPass());
// Form canonically associated expression trees, and simplify the trees using
// basic mathematical properties. For example, this will form (nearly)
// minimal multiplication trees.
FPM.addPass(ReassociatePass());
// Add the primary loop simplification pipeline.
// FIXME: Currently this is split into two loop pass pipelines because we run
// some function passes in between them. These can and should be removed
// and/or replaced by scheduling the loop pass equivalents in the correct
// positions. But those equivalent passes aren't powerful enough yet.
// Specifically, `SimplifyCFGPass` and `InstCombinePass` are currently still
// used. We have `LoopSimplifyCFGPass` which isn't yet powerful enough yet to
// fully replace `SimplifyCFGPass`, and the closest to the other we have is
// `LoopInstSimplify`.
LoopPassManager LPM1, LPM2;
// Simplify the loop body. We do this initially to clean up after other loop
// passes run, either when iterating on a loop or on inner loops with
// implications on the outer loop.
LPM1.addPass(LoopInstSimplifyPass());
LPM1.addPass(LoopSimplifyCFGPass());
// Try to remove as much code from the loop header as possible,
// to reduce amount of IR that will have to be duplicated.
// TODO: Investigate promotion cap for O1.
LPM1.addPass(LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap));
// Disable header duplication in loop rotation at -Oz.
LPM1.addPass(
LoopRotatePass(Level != OptimizationLevel::Oz, isLTOPreLink(Phase)));
// TODO: Investigate promotion cap for O1.
LPM1.addPass(LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap));
LPM1.addPass(
SimpleLoopUnswitchPass(/* NonTrivial */ Level == OptimizationLevel::O3 &&
EnableO3NonTrivialUnswitching));
LPM2.addPass(LoopIdiomRecognizePass());
LPM2.addPass(IndVarSimplifyPass());
for (auto &C : LateLoopOptimizationsEPCallbacks)
C(LPM2, Level);
LPM2.addPass(LoopDeletionPass());
if (EnableLoopInterchange)
LPM2.addPass(LoopInterchangePass());
// Do not enable unrolling in PreLinkThinLTO phase during sample PGO
// because it changes IR to makes profile annotation in back compile
// inaccurate. The normal unroller doesn't pay attention to forced full unroll
// attributes so we need to make sure and allow the full unroll pass to pay
// attention to it.
if (Phase != ThinOrFullLTOPhase::ThinLTOPreLink || !PGOOpt ||
PGOOpt->Action != PGOOptions::SampleUse)
LPM2.addPass(LoopFullUnrollPass(Level.getSpeedupLevel(),
/* OnlyWhenForced= */ !PTO.LoopUnrolling,
PTO.ForgetAllSCEVInLoopUnroll));
for (auto &C : LoopOptimizerEndEPCallbacks)
C(LPM2, Level);
// We provide the opt remark emitter pass for LICM to use. We only need to do
// this once as it is immutable.
FPM.addPass(
RequireAnalysisPass<OptimizationRemarkEmitterAnalysis, Function>());
FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM1),
EnableMSSALoopDependency,
/*UseBlockFrequencyInfo=*/true));
FPM.addPass(SimplifyCFGPass());
FPM.addPass(InstCombinePass());
if (EnableLoopFlatten)
FPM.addPass(createFunctionToLoopPassAdaptor(LoopFlattenPass()));
// The loop passes in LPM2 (LoopIdiomRecognizePass, IndVarSimplifyPass,
// LoopDeletionPass and LoopFullUnrollPass) do not preserve MemorySSA.
// *All* loop passes must preserve it, in order to be able to use it.
FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM2),
/*UseMemorySSA=*/false,
/*UseBlockFrequencyInfo=*/false));
// Delete small array after loop unroll.
FPM.addPass(SROA());
// Eliminate redundancies.
FPM.addPass(MergedLoadStoreMotionPass());
if (RunNewGVN)
FPM.addPass(NewGVNPass());
else
FPM.addPass(GVN());
// Sparse conditional constant propagation.
// FIXME: It isn't clear why we do this *after* loop passes rather than
// before...
FPM.addPass(SCCPPass());
// Delete dead bit computations (instcombine runs after to fold away the dead
// computations, and then ADCE will run later to exploit any new DCE
// opportunities that creates).
FPM.addPass(BDCEPass());
// Run instcombine after redundancy and dead bit elimination to exploit
// opportunities opened up by them.
FPM.addPass(InstCombinePass());
invokePeepholeEPCallbacks(FPM, Level);
// Re-consider control flow based optimizations after redundancy elimination,
// redo DCE, etc.
FPM.addPass(JumpThreadingPass());
FPM.addPass(CorrelatedValuePropagationPass());
// Finally, do an expensive DCE pass to catch all the dead code exposed by
// the simplifications and basic cleanup after all the simplifications.
// TODO: Investigate if this is too expensive.
FPM.addPass(ADCEPass());
// Specially optimize memory movement as it doesn't look like dataflow in SSA.
FPM.addPass(MemCpyOptPass());
FPM.addPass(DSEPass());
FPM.addPass(createFunctionToLoopPassAdaptor(
LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap),
EnableMSSALoopDependency, /*UseBlockFrequencyInfo=*/true));
if (PTO.Coroutines)
FPM.addPass(CoroElidePass());
for (auto &C : ScalarOptimizerLateEPCallbacks)
C(FPM, Level);
FPM.addPass(SimplifyCFGPass(
SimplifyCFGOptions().hoistCommonInsts(true).sinkCommonInsts(true)));
FPM.addPass(InstCombinePass());
invokePeepholeEPCallbacks(FPM, Level);
if (EnableCHR && Level == OptimizationLevel::O3 && PGOOpt &&
(PGOOpt->Action == PGOOptions::IRUse ||
PGOOpt->Action == PGOOptions::SampleUse))
FPM.addPass(ControlHeightReductionPass());
return FPM;
}
void PassBuilder::addRequiredLTOPreLinkPasses(ModulePassManager &MPM) {
MPM.addPass(CanonicalizeAliasesPass());
MPM.addPass(NameAnonGlobalPass());
}
void PassBuilder::addPGOInstrPasses(ModulePassManager &MPM,
PassBuilder::OptimizationLevel Level,
bool RunProfileGen, bool IsCS,
std::string ProfileFile,
std::string ProfileRemappingFile) {
assert(Level != OptimizationLevel::O0 && "Not expecting O0 here!");
if (!IsCS && !DisablePreInliner) {
InlineParams IP;
IP.DefaultThreshold = PreInlineThreshold;
// FIXME: The hint threshold has the same value used by the regular inliner
// when not optimzing for size. This should probably be lowered after
// performance testing.
// FIXME: this comment is cargo culted from the old pass manager, revisit).
IP.HintThreshold = Level.isOptimizingForSize() ? PreInlineThreshold : 325;
ModuleInlinerWrapperPass MIWP(IP);
CGSCCPassManager &CGPipeline = MIWP.getPM();
FunctionPassManager FPM;
FPM.addPass(SROA());
FPM.addPass(EarlyCSEPass()); // Catch trivial redundancies.
FPM.addPass(SimplifyCFGPass()); // Merge & remove basic blocks.
FPM.addPass(InstCombinePass()); // Combine silly sequences.
invokePeepholeEPCallbacks(FPM, Level);
CGPipeline.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM)));
MPM.addPass(std::move(MIWP));
// Delete anything that is now dead to make sure that we don't instrument
// dead code. Instrumentation can end up keeping dead code around and
// dramatically increase code size.
MPM.addPass(GlobalDCEPass());
}
if (!RunProfileGen) {
assert(!ProfileFile.empty() && "Profile use expecting a profile file!");
MPM.addPass(PGOInstrumentationUse(ProfileFile, ProfileRemappingFile, IsCS));
// Cache ProfileSummaryAnalysis once to avoid the potential need to insert
// RequireAnalysisPass for PSI before subsequent non-module passes.
MPM.addPass(RequireAnalysisPass<ProfileSummaryAnalysis, Module>());
return;
}
// Perform PGO instrumentation.
MPM.addPass(PGOInstrumentationGen(IsCS));
FunctionPassManager FPM;
// Disable header duplication in loop rotation at -Oz.
FPM.addPass(createFunctionToLoopPassAdaptor(
LoopRotatePass(Level != OptimizationLevel::Oz), EnableMSSALoopDependency,
/*UseBlockFrequencyInfo=*/false));
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
// Add the profile lowering pass.
InstrProfOptions Options;
if (!ProfileFile.empty())
Options.InstrProfileOutput = ProfileFile;
// Do counter promotion at Level greater than O0.
Options.DoCounterPromotion = true;
Options.UseBFIInPromotion = IsCS;
MPM.addPass(InstrProfiling(Options, IsCS));
}
void PassBuilder::addPGOInstrPassesForO0(ModulePassManager &MPM,
bool RunProfileGen, bool IsCS,
std::string ProfileFile,
std::string ProfileRemappingFile) {
if (!RunProfileGen) {
assert(!ProfileFile.empty() && "Profile use expecting a profile file!");
MPM.addPass(PGOInstrumentationUse(ProfileFile, ProfileRemappingFile, IsCS));
// Cache ProfileSummaryAnalysis once to avoid the potential need to insert
// RequireAnalysisPass for PSI before subsequent non-module passes.
MPM.addPass(RequireAnalysisPass<ProfileSummaryAnalysis, Module>());
return;
}
// Perform PGO instrumentation.
MPM.addPass(PGOInstrumentationGen(IsCS));
// Add the profile lowering pass.
InstrProfOptions Options;
if (!ProfileFile.empty())
Options.InstrProfileOutput = ProfileFile;
// Do not do counter promotion at O0.
Options.DoCounterPromotion = false;
Options.UseBFIInPromotion = IsCS;
MPM.addPass(InstrProfiling(Options, IsCS));
}
static InlineParams
getInlineParamsFromOptLevel(PassBuilder::OptimizationLevel Level) {
return getInlineParams(Level.getSpeedupLevel(), Level.getSizeLevel());
}
ModuleInlinerWrapperPass
PassBuilder::buildInlinerPipeline(OptimizationLevel Level,
ThinOrFullLTOPhase Phase) {
InlineParams IP = getInlineParamsFromOptLevel(Level);
if (Phase == ThinOrFullLTOPhase::ThinLTOPreLink && PGOOpt &&
PGOOpt->Action == PGOOptions::SampleUse)
IP.HotCallSiteThreshold = 0;
if (PGOOpt)
IP.EnableDeferral = EnablePGOInlineDeferral;
ModuleInlinerWrapperPass MIWP(IP, PerformMandatoryInliningsFirst,
UseInlineAdvisor, MaxDevirtIterations);
// Require the GlobalsAA analysis for the module so we can query it within
// the CGSCC pipeline.
MIWP.addModulePass(RequireAnalysisPass<GlobalsAA, Module>());
// Invalidate AAManager so it can be recreated and pick up the newly available
// GlobalsAA.
MIWP.addModulePass(
createModuleToFunctionPassAdaptor(InvalidateAnalysisPass<AAManager>()));
// Require the ProfileSummaryAnalysis for the module so we can query it within
// the inliner pass.
MIWP.addModulePass(RequireAnalysisPass<ProfileSummaryAnalysis, Module>());
// Now begin the main postorder CGSCC pipeline.
// FIXME: The current CGSCC pipeline has its origins in the legacy pass
// manager and trying to emulate its precise behavior. Much of this doesn't
// make a lot of sense and we should revisit the core CGSCC structure.
CGSCCPassManager &MainCGPipeline = MIWP.getPM();
// Note: historically, the PruneEH pass was run first to deduce nounwind and
// generally clean up exception handling overhead. It isn't clear this is
// valuable as the inliner doesn't currently care whether it is inlining an
// invoke or a call.
if (AttributorRun & AttributorRunOption::CGSCC)
MainCGPipeline.addPass(AttributorCGSCCPass());
if (PTO.Coroutines)
MainCGPipeline.addPass(CoroSplitPass(Level != OptimizationLevel::O0));
// Now deduce any function attributes based in the current code.
MainCGPipeline.addPass(PostOrderFunctionAttrsPass());
// When at O3 add argument promotion to the pass pipeline.
// FIXME: It isn't at all clear why this should be limited to O3.
if (Level == OptimizationLevel::O3)
MainCGPipeline.addPass(ArgumentPromotionPass());
// Try to perform OpenMP specific optimizations. This is a (quick!) no-op if
// there are no OpenMP runtime calls present in the module.
if (Level == OptimizationLevel::O2 || Level == OptimizationLevel::O3)
MainCGPipeline.addPass(OpenMPOptCGSCCPass());
for (auto &C : CGSCCOptimizerLateEPCallbacks)
C(MainCGPipeline, Level);
// Lastly, add the core function simplification pipeline nested inside the
// CGSCC walk.
MainCGPipeline.addPass(createCGSCCToFunctionPassAdaptor(
buildFunctionSimplificationPipeline(Level, Phase)));
return MIWP;
}
ModulePassManager
PassBuilder::buildModuleSimplificationPipeline(OptimizationLevel Level,
ThinOrFullLTOPhase Phase) {
ModulePassManager MPM;
// Place pseudo probe instrumentation as the first pass of the pipeline to
// minimize the impact of optimization changes.
if (PGOOpt && PGOOpt->PseudoProbeForProfiling &&
Phase != ThinOrFullLTOPhase::ThinLTOPostLink)
MPM.addPass(SampleProfileProbePass(TM));
bool HasSampleProfile = PGOOpt && (PGOOpt->Action == PGOOptions::SampleUse);
// In ThinLTO mode, when flattened profile is used, all the available
// profile information will be annotated in PreLink phase so there is
// no need to load the profile again in PostLink.
bool LoadSampleProfile =
HasSampleProfile &&
!(FlattenedProfileUsed && Phase == ThinOrFullLTOPhase::ThinLTOPostLink);
// During the ThinLTO backend phase we perform early indirect call promotion
// here, before globalopt. Otherwise imported available_externally functions
// look unreferenced and are removed. If we are going to load the sample
// profile then defer until later.
// TODO: See if we can move later and consolidate with the location where
// we perform ICP when we are loading a sample profile.
// TODO: We pass HasSampleProfile (whether there was a sample profile file
// passed to the compile) to the SamplePGO flag of ICP. This is used to
// determine whether the new direct calls are annotated with prof metadata.
// Ideally this should be determined from whether the IR is annotated with
// sample profile, and not whether the a sample profile was provided on the
// command line. E.g. for flattened profiles where we will not be reloading
// the sample profile in the ThinLTO backend, we ideally shouldn't have to
// provide the sample profile file.
if (Phase == ThinOrFullLTOPhase::ThinLTOPostLink && !LoadSampleProfile)
MPM.addPass(PGOIndirectCallPromotion(true /* InLTO */, HasSampleProfile));
// Do basic inference of function attributes from known properties of system
// libraries and other oracles.
MPM.addPass(InferFunctionAttrsPass());
// Create an early function pass manager to cleanup the output of the
// frontend.
FunctionPassManager EarlyFPM;
// Lower llvm.expect to metadata before attempting transforms.
// Compare/branch metadata may alter the behavior of passes like SimplifyCFG.
EarlyFPM.addPass(LowerExpectIntrinsicPass());
EarlyFPM.addPass(SimplifyCFGPass());
EarlyFPM.addPass(SROA());
EarlyFPM.addPass(EarlyCSEPass());
if (PTO.Coroutines)
EarlyFPM.addPass(CoroEarlyPass());
if (Level == OptimizationLevel::O3)
EarlyFPM.addPass(CallSiteSplittingPass());
// In SamplePGO ThinLTO backend, we need instcombine before profile annotation
// to convert bitcast to direct calls so that they can be inlined during the
// profile annotation prepration step.
// More details about SamplePGO design can be found in:
// https://research.google.com/pubs/pub45290.html
// FIXME: revisit how SampleProfileLoad/Inliner/ICP is structured.
if (LoadSampleProfile)
EarlyFPM.addPass(InstCombinePass());
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(EarlyFPM)));
if (LoadSampleProfile) {
// Annotate sample profile right after early FPM to ensure freshness of
// the debug info.
MPM.addPass(SampleProfileLoaderPass(PGOOpt->ProfileFile,
PGOOpt->ProfileRemappingFile, Phase));
// Cache ProfileSummaryAnalysis once to avoid the potential need to insert
// RequireAnalysisPass for PSI before subsequent non-module passes.
MPM.addPass(RequireAnalysisPass<ProfileSummaryAnalysis, Module>());
// Do not invoke ICP in the LTOPrelink phase as it makes it hard
// for the profile annotation to be accurate in the LTO backend.
if (Phase != ThinOrFullLTOPhase::ThinLTOPreLink &&
Phase != ThinOrFullLTOPhase::FullLTOPreLink)
// We perform early indirect call promotion here, before globalopt.
// This is important for the ThinLTO backend phase because otherwise
// imported available_externally functions look unreferenced and are
// removed.
MPM.addPass(
PGOIndirectCallPromotion(true /* IsInLTO */, true /* SamplePGO */));
}
// Try to perform OpenMP specific optimizations on the module. This is a
// (quick!) no-op if there are no OpenMP runtime calls present in the module.
if (Level == OptimizationLevel::O2 || Level == OptimizationLevel::O3)
MPM.addPass(OpenMPOptPass());
if (AttributorRun & AttributorRunOption::MODULE)
MPM.addPass(AttributorPass());
// Lower type metadata and the type.test intrinsic in the ThinLTO
// post link pipeline after ICP. This is to enable usage of the type
// tests in ICP sequences.
if (Phase == ThinOrFullLTOPhase::ThinLTOPostLink)
MPM.addPass(LowerTypeTestsPass(nullptr, nullptr, true));
for (auto &C : PipelineEarlySimplificationEPCallbacks)
C(MPM, Level);
// Specialize functions with IPSCCP.
if (EnableFunctionSpecialization)
MPM.addPass(FunctionSpecializationPass());
// Interprocedural constant propagation now that basic cleanup has occurred
// and prior to optimizing globals.
// FIXME: This position in the pipeline hasn't been carefully considered in
// years, it should be re-analyzed.
MPM.addPass(IPSCCPPass());
// Attach metadata to indirect call sites indicating the set of functions
// they may target at run-time. This should follow IPSCCP.
MPM.addPass(CalledValuePropagationPass());
// Optimize globals to try and fold them into constants.
MPM.addPass(GlobalOptPass());
// Promote any localized globals to SSA registers.
// FIXME: Should this instead by a run of SROA?
// FIXME: We should probably run instcombine and simplify-cfg afterward to
// delete control flows that are dead once globals have been folded to
// constants.
MPM.addPass(createModuleToFunctionPassAdaptor(PromotePass()));
// Remove any dead arguments exposed by cleanups and constant folding
// globals.
MPM.addPass(DeadArgumentEliminationPass());
// Create a small function pass pipeline to cleanup after all the global
// optimizations.
FunctionPassManager GlobalCleanupPM;
GlobalCleanupPM.addPass(InstCombinePass());
invokePeepholeEPCallbacks(GlobalCleanupPM, Level);
GlobalCleanupPM.addPass(SimplifyCFGPass());
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(GlobalCleanupPM)));
// Add all the requested passes for instrumentation PGO, if requested.
if (PGOOpt && Phase != ThinOrFullLTOPhase::ThinLTOPostLink &&
(PGOOpt->Action == PGOOptions::IRInstr ||
PGOOpt->Action == PGOOptions::IRUse)) {
addPGOInstrPasses(MPM, Level,
/* RunProfileGen */ PGOOpt->Action == PGOOptions::IRInstr,
/* IsCS */ false, PGOOpt->ProfileFile,
PGOOpt->ProfileRemappingFile);
MPM.addPass(PGOIndirectCallPromotion(false, false));
}
if (PGOOpt && Phase != ThinOrFullLTOPhase::ThinLTOPostLink &&
PGOOpt->CSAction == PGOOptions::CSIRInstr)
MPM.addPass(PGOInstrumentationGenCreateVar(PGOOpt->CSProfileGenFile));
// Synthesize function entry counts for non-PGO compilation.
if (EnableSyntheticCounts && !PGOOpt)
MPM.addPass(SyntheticCountsPropagation());
MPM.addPass(buildInlinerPipeline(Level, Phase));
if (EnableMemProfiler && Phase != ThinOrFullLTOPhase::ThinLTOPreLink) {
MPM.addPass(createModuleToFunctionPassAdaptor(MemProfilerPass()));
MPM.addPass(ModuleMemProfilerPass());
}
return MPM;
}
/// TODO: Should LTO cause any differences to this set of passes?
void PassBuilder::addVectorPasses(OptimizationLevel Level,
FunctionPassManager &FPM, bool IsLTO) {
FPM.addPass(LoopVectorizePass(
LoopVectorizeOptions(!PTO.LoopInterleaving, !PTO.LoopVectorization)));
if (IsLTO) {
// The vectorizer may have significantly shortened a loop body; unroll
// again. Unroll small loops to hide loop backedge latency and saturate any
// parallel execution resources of an out-of-order processor. We also then
// need to clean up redundancies and loop invariant code.
// FIXME: It would be really good to use a loop-integrated instruction
// combiner for cleanup here so that the unrolling and LICM can be pipelined
// across the loop nests.
// We do UnrollAndJam in a separate LPM to ensure it happens before unroll
if (EnableUnrollAndJam && PTO.LoopUnrolling)
FPM.addPass(createFunctionToLoopPassAdaptor(
LoopUnrollAndJamPass(Level.getSpeedupLevel())));
FPM.addPass(LoopUnrollPass(LoopUnrollOptions(
Level.getSpeedupLevel(), /*OnlyWhenForced=*/!PTO.LoopUnrolling,
PTO.ForgetAllSCEVInLoopUnroll)));
FPM.addPass(WarnMissedTransformationsPass());
}
if (!IsLTO) {
// Eliminate loads by forwarding stores from the previous iteration to loads
// of the current iteration.
FPM.addPass(LoopLoadEliminationPass());
}
// Cleanup after the loop optimization passes.
FPM.addPass(InstCombinePass());
if (Level.getSpeedupLevel() > 1 && ExtraVectorizerPasses) {
// At higher optimization levels, try to clean up any runtime overlap and
// alignment checks inserted by the vectorizer. We want to track correlated
// runtime checks for two inner loops in the same outer loop, fold any
// common computations, hoist loop-invariant aspects out of any outer loop,
// and unswitch the runtime checks if possible. Once hoisted, we may have
// dead (or speculatable) control flows or more combining opportunities.
FPM.addPass(EarlyCSEPass());
FPM.addPass(CorrelatedValuePropagationPass());
FPM.addPass(InstCombinePass());
LoopPassManager LPM;
LPM.addPass(LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap));
LPM.addPass(SimpleLoopUnswitchPass(/* NonTrivial */ Level ==
OptimizationLevel::O3));
FPM.addPass(
RequireAnalysisPass<OptimizationRemarkEmitterAnalysis, Function>());
FPM.addPass(createFunctionToLoopPassAdaptor(
std::move(LPM), EnableMSSALoopDependency,
/*UseBlockFrequencyInfo=*/true));
FPM.addPass(SimplifyCFGPass());
FPM.addPass(InstCombinePass());
}
// Now that we've formed fast to execute loop structures, we do further
// optimizations. These are run afterward as they might block doing complex
// analyses and transforms such as what are needed for loop vectorization.
// Cleanup after loop vectorization, etc. Simplification passes like CVP and
// GVN, loop transforms, and others have already run, so it's now better to
// convert to more optimized IR using more aggressive simplify CFG options.
// The extra sinking transform can create larger basic blocks, so do this
// before SLP vectorization.
FPM.addPass(SimplifyCFGPass(SimplifyCFGOptions()
.forwardSwitchCondToPhi(true)
.convertSwitchToLookupTable(true)
.needCanonicalLoops(false)
.hoistCommonInsts(true)
.sinkCommonInsts(true)));
if (IsLTO) {
FPM.addPass(SCCPPass());
FPM.addPass(InstCombinePass());
FPM.addPass(BDCEPass());
}
// Optimize parallel scalar instruction chains into SIMD instructions.
if (PTO.SLPVectorization) {
FPM.addPass(SLPVectorizerPass());
if (Level.getSpeedupLevel() > 1 && ExtraVectorizerPasses) {
FPM.addPass(EarlyCSEPass());
}
}
// Enhance/cleanup vector code.
FPM.addPass(VectorCombinePass());
if (!IsLTO) {
FPM.addPass(InstCombinePass());
// Unroll small loops to hide loop backedge latency and saturate any
// parallel execution resources of an out-of-order processor. We also then
// need to clean up redundancies and loop invariant code.
// FIXME: It would be really good to use a loop-integrated instruction
// combiner for cleanup here so that the unrolling and LICM can be pipelined
// across the loop nests.
// We do UnrollAndJam in a separate LPM to ensure it happens before unroll
if (EnableUnrollAndJam && PTO.LoopUnrolling) {
FPM.addPass(createFunctionToLoopPassAdaptor(
LoopUnrollAndJamPass(Level.getSpeedupLevel())));
}
FPM.addPass(LoopUnrollPass(LoopUnrollOptions(
Level.getSpeedupLevel(), /*OnlyWhenForced=*/!PTO.LoopUnrolling,
PTO.ForgetAllSCEVInLoopUnroll)));
FPM.addPass(WarnMissedTransformationsPass());
FPM.addPass(InstCombinePass());
FPM.addPass(
RequireAnalysisPass<OptimizationRemarkEmitterAnalysis, Function>());
FPM.addPass(createFunctionToLoopPassAdaptor(
LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap),
EnableMSSALoopDependency, /*UseBlockFrequencyInfo=*/true));
}
// Now that we've vectorized and unrolled loops, we may have more refined
// alignment information, try to re-derive it here.
FPM.addPass(AlignmentFromAssumptionsPass());
if (IsLTO)
FPM.addPass(InstCombinePass());
}
ModulePassManager
PassBuilder::buildModuleOptimizationPipeline(OptimizationLevel Level,
bool LTOPreLink) {
ModulePassManager MPM;
// Optimize globals now that the module is fully simplified.
MPM.addPass(GlobalOptPass());
MPM.addPass(GlobalDCEPass());
// Run partial inlining pass to partially inline functions that have
// large bodies.
if (RunPartialInlining)
MPM.addPass(PartialInlinerPass());
// Remove avail extern fns and globals definitions since we aren't compiling
// an object file for later LTO. For LTO we want to preserve these so they
// are eligible for inlining at link-time. Note if they are unreferenced they
// will be removed by GlobalDCE later, so this only impacts referenced
// available externally globals. Eventually they will be suppressed during
// codegen, but eliminating here enables more opportunity for GlobalDCE as it
// may make globals referenced by available external functions dead and saves
// running remaining passes on the eliminated functions. These should be
// preserved during prelinking for link-time inlining decisions.
if (!LTOPreLink)
MPM.addPass(EliminateAvailableExternallyPass());
if (EnableOrderFileInstrumentation)
MPM.addPass(InstrOrderFilePass());
// Do RPO function attribute inference across the module to forward-propagate
// attributes where applicable.
// FIXME: Is this really an optimization rather than a canonicalization?
MPM.addPass(ReversePostOrderFunctionAttrsPass());
// Do a post inline PGO instrumentation and use pass. This is a context
// sensitive PGO pass. We don't want to do this in LTOPreLink phrase as
// cross-module inline has not been done yet. The context sensitive
// instrumentation is after all the inlines are done.
if (!LTOPreLink && PGOOpt) {
if (PGOOpt->CSAction == PGOOptions::CSIRInstr)
addPGOInstrPasses(MPM, Level, /* RunProfileGen */ true,
/* IsCS */ true, PGOOpt->CSProfileGenFile,
PGOOpt->ProfileRemappingFile);
else if (PGOOpt->CSAction == PGOOptions::CSIRUse)
addPGOInstrPasses(MPM, Level, /* RunProfileGen */ false,
/* IsCS */ true, PGOOpt->ProfileFile,
PGOOpt->ProfileRemappingFile);
}
// Re-require GloblasAA here prior to function passes. This is particularly
// useful as the above will have inlined, DCE'ed, and function-attr
// propagated everything. We should at this point have a reasonably minimal
// and richly annotated call graph. By computing aliasing and mod/ref
// information for all local globals here, the late loop passes and notably
// the vectorizer will be able to use them to help recognize vectorizable
// memory operations.
MPM.addPass(RequireAnalysisPass<GlobalsAA, Module>());
FunctionPassManager OptimizePM;
OptimizePM.addPass(Float2IntPass());
OptimizePM.addPass(LowerConstantIntrinsicsPass());
if (EnableMatrix) {
OptimizePM.addPass(LowerMatrixIntrinsicsPass());
OptimizePM.addPass(EarlyCSEPass());
}
// FIXME: We need to run some loop optimizations to re-rotate loops after
// simplify-cfg and others undo their rotation.
// Optimize the loop execution. These passes operate on entire loop nests
// rather than on each loop in an inside-out manner, and so they are actually
// function passes.
for (auto &C : VectorizerStartEPCallbacks)
C(OptimizePM, Level);
// First rotate loops that may have been un-rotated by prior passes.
// Disable header duplication at -Oz.
OptimizePM.addPass(createFunctionToLoopPassAdaptor(
LoopRotatePass(Level != OptimizationLevel::Oz, LTOPreLink),
EnableMSSALoopDependency,
/*UseBlockFrequencyInfo=*/false));
// Distribute loops to allow partial vectorization. I.e. isolate dependences
// into separate loop that would otherwise inhibit vectorization. This is
// currently only performed for loops marked with the metadata
// llvm.loop.distribute=true or when -enable-loop-distribute is specified.
OptimizePM.addPass(LoopDistributePass());
// Populates the VFABI attribute with the scalar-to-vector mappings
// from the TargetLibraryInfo.
OptimizePM.addPass(InjectTLIMappings());
addVectorPasses(Level, OptimizePM, /* IsLTO */ false);
// Split out cold code. Splitting is done late to avoid hiding context from
// other optimizations and inadvertently regressing performance. The tradeoff
// is that this has a higher code size cost than splitting early.
if (EnableHotColdSplit && !LTOPreLink)
MPM.addPass(HotColdSplittingPass());
// Search the code for similar regions of code. If enough similar regions can
// be found where extracting the regions into their own function will decrease
// the size of the program, we extract the regions, a deduplicate the
// structurally similar regions.
if (EnableIROutliner)
MPM.addPass(IROutlinerPass());
// Merge functions if requested.
if (PTO.MergeFunctions)
MPM.addPass(MergeFunctionsPass());
// LoopSink pass sinks instructions hoisted by LICM, which serves as a
// canonicalization pass that enables other optimizations. As a result,
// LoopSink pass needs to be a very late IR pass to avoid undoing LICM
// result too early.
OptimizePM.addPass(LoopSinkPass());
// And finally clean up LCSSA form before generating code.
OptimizePM.addPass(InstSimplifyPass());
// This hoists/decomposes div/rem ops. It should run after other sink/hoist
// passes to avoid re-sinking, but before SimplifyCFG because it can allow
// flattening of blocks.
OptimizePM.addPass(DivRemPairsPass());
// LoopSink (and other loop passes since the last simplifyCFG) might have
// resulted in single-entry-single-exit or empty blocks. Clean up the CFG.
OptimizePM.addPass(SimplifyCFGPass());
// Optimize PHIs by speculating around them when profitable. Note that this
// pass needs to be run after any PRE or similar pass as it is essentially
// inserting redundancies into the program. This even includes SimplifyCFG.
OptimizePM.addPass(SpeculateAroundPHIsPass());
if (PTO.Coroutines)
OptimizePM.addPass(CoroCleanupPass());
// Add the core optimizing pipeline.
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(OptimizePM)));
for (auto &C : OptimizerLastEPCallbacks)
C(MPM, Level);
if (PTO.CallGraphProfile)
MPM.addPass(CGProfilePass());
// Now we need to do some global optimization transforms.
// FIXME: It would seem like these should come first in the optimization
// pipeline and maybe be the bottom of the canonicalization pipeline? Weird
// ordering here.
MPM.addPass(GlobalDCEPass());
MPM.addPass(ConstantMergePass());
// TODO: Relative look table converter pass caused an issue when full lto is
// enabled. See https://reviews.llvm.org/D94355 for more details.
// Until the issue fixed, disable this pass during pre-linking phase.
if (!LTOPreLink)
MPM.addPass(RelLookupTableConverterPass());
return MPM;
}
ModulePassManager
PassBuilder::buildPerModuleDefaultPipeline(OptimizationLevel Level,
bool LTOPreLink) {
assert(Level != OptimizationLevel::O0 &&
"Must request optimizations for the default pipeline!");
ModulePassManager MPM;
// Convert @llvm.global.annotations to !annotation metadata.
MPM.addPass(Annotation2MetadataPass());
// Force any function attributes we want the rest of the pipeline to observe.
MPM.addPass(ForceFunctionAttrsPass());
// Apply module pipeline start EP callback.
for (auto &C : PipelineStartEPCallbacks)
C(MPM, Level);
if (PGOOpt && PGOOpt->DebugInfoForProfiling)
MPM.addPass(createModuleToFunctionPassAdaptor(AddDiscriminatorsPass()));
// Add the core simplification pipeline.
MPM.addPass(buildModuleSimplificationPipeline(
Level, LTOPreLink ? ThinOrFullLTOPhase::FullLTOPreLink
: ThinOrFullLTOPhase::None));
// Now add the optimization pipeline.
MPM.addPass(buildModuleOptimizationPipeline(Level, LTOPreLink));
if (PGOOpt && PGOOpt->PseudoProbeForProfiling)
MPM.addPass(PseudoProbeUpdatePass());
// Emit annotation remarks.
addAnnotationRemarksPass(MPM);
if (LTOPreLink)
addRequiredLTOPreLinkPasses(MPM);
return MPM;
}
ModulePassManager
PassBuilder::buildThinLTOPreLinkDefaultPipeline(OptimizationLevel Level) {
assert(Level != OptimizationLevel::O0 &&
"Must request optimizations for the default pipeline!");
ModulePassManager MPM;
// Convert @llvm.global.annotations to !annotation metadata.
MPM.addPass(Annotation2MetadataPass());
// Force any function attributes we want the rest of the pipeline to observe.
MPM.addPass(ForceFunctionAttrsPass());
if (PGOOpt && PGOOpt->DebugInfoForProfiling)
MPM.addPass(createModuleToFunctionPassAdaptor(AddDiscriminatorsPass()));
// Apply module pipeline start EP callback.
for (auto &C : PipelineStartEPCallbacks)
C(MPM, Level);
// If we are planning to perform ThinLTO later, we don't bloat the code with
// unrolling/vectorization/... now. Just simplify the module as much as we
// can.
MPM.addPass(buildModuleSimplificationPipeline(
Level, ThinOrFullLTOPhase::ThinLTOPreLink));
// Run partial inlining pass to partially inline functions that have
// large bodies.
// FIXME: It isn't clear whether this is really the right place to run this
// in ThinLTO. Because there is another canonicalization and simplification
// phase that will run after the thin link, running this here ends up with
// less information than will be available later and it may grow functions in
// ways that aren't beneficial.
if (RunPartialInlining)
MPM.addPass(PartialInlinerPass());
// Reduce the size of the IR as much as possible.
MPM.addPass(GlobalOptPass());
// Module simplification splits coroutines, but does not fully clean up
// coroutine intrinsics. To ensure ThinLTO optimization passes don't trip up
// on these, we schedule the cleanup here.
if (PTO.Coroutines)
MPM.addPass(createModuleToFunctionPassAdaptor(CoroCleanupPass()));
if (PGOOpt && PGOOpt->PseudoProbeForProfiling)
MPM.addPass(PseudoProbeUpdatePass());
// Handle OptimizerLastEPCallbacks added by clang on PreLink. Actual
// optimization is going to be done in PostLink stage, but clang can't
// add callbacks there in case of in-process ThinLTO called by linker.
for (auto &C : OptimizerLastEPCallbacks)
C(MPM, Level);
// Emit annotation remarks.
addAnnotationRemarksPass(MPM);
addRequiredLTOPreLinkPasses(MPM);
return MPM;
}
ModulePassManager PassBuilder::buildThinLTODefaultPipeline(
OptimizationLevel Level, const ModuleSummaryIndex *ImportSummary) {
ModulePassManager MPM;
// Convert @llvm.global.annotations to !annotation metadata.
MPM.addPass(Annotation2MetadataPass());
if (ImportSummary) {
// These passes import type identifier resolutions for whole-program
// devirtualization and CFI. They must run early because other passes may
// disturb the specific instruction patterns that these passes look for,
// creating dependencies on resolutions that may not appear in the summary.
//
// For example, GVN may transform the pattern assume(type.test) appearing in
// two basic blocks into assume(phi(type.test, type.test)), which would
// transform a dependency on a WPD resolution into a dependency on a type
// identifier resolution for CFI.
//
// Also, WPD has access to more precise information than ICP and can
// devirtualize more effectively, so it should operate on the IR first.
//
// The WPD and LowerTypeTest passes need to run at -O0 to lower type
// metadata and intrinsics.
MPM.addPass(WholeProgramDevirtPass(nullptr, ImportSummary));
MPM.addPass(LowerTypeTestsPass(nullptr, ImportSummary));
}
if (Level == OptimizationLevel::O0) {
// Run a second time to clean up any type tests left behind by WPD for use
// in ICP.
MPM.addPass(LowerTypeTestsPass(nullptr, nullptr, true));
// Drop available_externally and unreferenced globals. This is necessary
// with ThinLTO in order to avoid leaving undefined references to dead
// globals in the object file.
MPM.addPass(EliminateAvailableExternallyPass());
MPM.addPass(GlobalDCEPass());
return MPM;
}
// Force any function attributes we want the rest of the pipeline to observe.
MPM.addPass(ForceFunctionAttrsPass());
// Add the core simplification pipeline.
MPM.addPass(buildModuleSimplificationPipeline(
Level, ThinOrFullLTOPhase::ThinLTOPostLink));
// Now add the optimization pipeline.
MPM.addPass(buildModuleOptimizationPipeline(Level));
// Emit annotation remarks.
addAnnotationRemarksPass(MPM);
return MPM;
}
ModulePassManager
PassBuilder::buildLTOPreLinkDefaultPipeline(OptimizationLevel Level) {
assert(Level != OptimizationLevel::O0 &&
"Must request optimizations for the default pipeline!");
// FIXME: We should use a customized pre-link pipeline!
return buildPerModuleDefaultPipeline(Level,
/* LTOPreLink */ true);
}
ModulePassManager
PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level,
ModuleSummaryIndex *ExportSummary) {
ModulePassManager MPM;
// Convert @llvm.global.annotations to !annotation metadata.
MPM.addPass(Annotation2MetadataPass());
if (Level == OptimizationLevel::O0) {
// The WPD and LowerTypeTest passes need to run at -O0 to lower type
// metadata and intrinsics.
MPM.addPass(WholeProgramDevirtPass(ExportSummary, nullptr));
MPM.addPass(LowerTypeTestsPass(ExportSummary, nullptr));
// Run a second time to clean up any type tests left behind by WPD for use
// in ICP.
MPM.addPass(LowerTypeTestsPass(nullptr, nullptr, true));
// Emit annotation remarks.
addAnnotationRemarksPass(MPM);
return MPM;
}
if (PGOOpt && PGOOpt->Action == PGOOptions::SampleUse) {
// Load sample profile before running the LTO optimization pipeline.
MPM.addPass(SampleProfileLoaderPass(PGOOpt->ProfileFile,
PGOOpt->ProfileRemappingFile,
ThinOrFullLTOPhase::FullLTOPostLink));
// Cache ProfileSummaryAnalysis once to avoid the potential need to insert
// RequireAnalysisPass for PSI before subsequent non-module passes.
MPM.addPass(RequireAnalysisPass<ProfileSummaryAnalysis, Module>());
}
// Remove unused virtual tables to improve the quality of code generated by
// whole-program devirtualization and bitset lowering.
MPM.addPass(GlobalDCEPass());
// Force any function attributes we want the rest of the pipeline to observe.
MPM.addPass(ForceFunctionAttrsPass());
// Do basic inference of function attributes from known properties of system
// libraries and other oracles.
MPM.addPass(InferFunctionAttrsPass());
if (Level.getSpeedupLevel() > 1) {
FunctionPassManager EarlyFPM;
EarlyFPM.addPass(CallSiteSplittingPass());
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(EarlyFPM)));
// Indirect call promotion. This should promote all the targets that are
// left by the earlier promotion pass that promotes intra-module targets.
// This two-step promotion is to save the compile time. For LTO, it should
// produce the same result as if we only do promotion here.
MPM.addPass(PGOIndirectCallPromotion(
true /* InLTO */, PGOOpt && PGOOpt->Action == PGOOptions::SampleUse));
if (EnableFunctionSpecialization)
MPM.addPass(FunctionSpecializationPass());
// Propagate constants at call sites into the functions they call. This
// opens opportunities for globalopt (and inlining) by substituting function
// pointers passed as arguments to direct uses of functions.
MPM.addPass(IPSCCPPass());
// Attach metadata to indirect call sites indicating the set of functions
// they may target at run-time. This should follow IPSCCP.
MPM.addPass(CalledValuePropagationPass());
}
// Now deduce any function attributes based in the current code.
MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(
PostOrderFunctionAttrsPass()));
// Do RPO function attribute inference across the module to forward-propagate
// attributes where applicable.
// FIXME: Is this really an optimization rather than a canonicalization?
MPM.addPass(ReversePostOrderFunctionAttrsPass());
// Use in-range annotations on GEP indices to split globals where beneficial.
MPM.addPass(GlobalSplitPass());
// Run whole program optimization of virtual call when the list of callees
// is fixed.
MPM.addPass(WholeProgramDevirtPass(ExportSummary, nullptr));
// Stop here at -O1.
if (Level == OptimizationLevel::O1) {
// The LowerTypeTestsPass needs to run to lower type metadata and the
// type.test intrinsics. The pass does nothing if CFI is disabled.
MPM.addPass(LowerTypeTestsPass(ExportSummary, nullptr));
// Run a second time to clean up any type tests left behind by WPD for use
// in ICP (which is performed earlier than this in the regular LTO
// pipeline).
MPM.addPass(LowerTypeTestsPass(nullptr, nullptr, true));
// Emit annotation remarks.
addAnnotationRemarksPass(MPM);
return MPM;
}
// Optimize globals to try and fold them into constants.
MPM.addPass(GlobalOptPass());
// Promote any localized globals to SSA registers.
MPM.addPass(createModuleToFunctionPassAdaptor(PromotePass()));
// Linking modules together can lead to duplicate global constant, only
// keep one copy of each constant.
MPM.addPass(ConstantMergePass());
// Remove unused arguments from functions.
MPM.addPass(DeadArgumentEliminationPass());
// Reduce the code after globalopt and ipsccp. Both can open up significant
// simplification opportunities, and both can propagate functions through
// function pointers. When this happens, we often have to resolve varargs
// calls, etc, so let instcombine do this.
FunctionPassManager PeepholeFPM;
if (Level == OptimizationLevel::O3)
PeepholeFPM.addPass(AggressiveInstCombinePass());
PeepholeFPM.addPass(InstCombinePass());
invokePeepholeEPCallbacks(PeepholeFPM, Level);
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(PeepholeFPM)));
// Note: historically, the PruneEH pass was run first to deduce nounwind and
// generally clean up exception handling overhead. It isn't clear this is
// valuable as the inliner doesn't currently care whether it is inlining an
// invoke or a call.
// Run the inliner now.
MPM.addPass(ModuleInlinerWrapperPass(getInlineParamsFromOptLevel(Level)));
// Optimize globals again after we ran the inliner.
MPM.addPass(GlobalOptPass());
// Garbage collect dead functions.
// FIXME: Add ArgumentPromotion pass after once it's ported.
MPM.addPass(GlobalDCEPass());
FunctionPassManager FPM;
// The IPO Passes may leave cruft around. Clean up after them.
FPM.addPass(InstCombinePass());
invokePeepholeEPCallbacks(FPM, Level);
FPM.addPass(JumpThreadingPass(/*InsertFreezeWhenUnfoldingSelect*/ true));
// Do a post inline PGO instrumentation and use pass. This is a context
// sensitive PGO pass.
if (PGOOpt) {
if (PGOOpt->CSAction == PGOOptions::CSIRInstr)
addPGOInstrPasses(MPM, Level, /* RunProfileGen */ true,
/* IsCS */ true, PGOOpt->CSProfileGenFile,
PGOOpt->ProfileRemappingFile);
else if (PGOOpt->CSAction == PGOOptions::CSIRUse)
addPGOInstrPasses(MPM, Level, /* RunProfileGen */ false,
/* IsCS */ true, PGOOpt->ProfileFile,
PGOOpt->ProfileRemappingFile);
}
// Break up allocas
FPM.addPass(SROA());
// LTO provides additional opportunities for tailcall elimination due to
// link-time inlining, and visibility of nocapture attribute.
FPM.addPass(TailCallElimPass());
// Run a few AA driver optimizations here and now to cleanup the code.
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
MPM.addPass(
createModuleToPostOrderCGSCCPassAdaptor(PostOrderFunctionAttrsPass()));
// Require the GlobalsAA analysis for the module so we can query it within
// MainFPM.
MPM.addPass(RequireAnalysisPass<GlobalsAA, Module>());
// Invalidate AAManager so it can be recreated and pick up the newly available
// GlobalsAA.
MPM.addPass(
createModuleToFunctionPassAdaptor(InvalidateAnalysisPass<AAManager>()));
FunctionPassManager MainFPM;
MainFPM.addPass(createFunctionToLoopPassAdaptor(
LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap),
EnableMSSALoopDependency, /*UseBlockFrequencyInfo=*/true));
if (RunNewGVN)
MainFPM.addPass(NewGVNPass());
else
MainFPM.addPass(GVN());
// Remove dead memcpy()'s.
MainFPM.addPass(MemCpyOptPass());
// Nuke dead stores.
MainFPM.addPass(DSEPass());
MainFPM.addPass(MergedLoadStoreMotionPass());
// More loops are countable; try to optimize them.
if (EnableLoopFlatten && Level.getSpeedupLevel() > 1)
MainFPM.addPass(createFunctionToLoopPassAdaptor(LoopFlattenPass()));
if (EnableConstraintElimination)
MainFPM.addPass(ConstraintEliminationPass());
LoopPassManager LPM;
LPM.addPass(IndVarSimplifyPass());
LPM.addPass(LoopDeletionPass());
// FIXME: Add loop interchange.
// Unroll small loops and perform peeling.
LPM.addPass(LoopFullUnrollPass(Level.getSpeedupLevel(),
/* OnlyWhenForced= */ !PTO.LoopUnrolling,
PTO.ForgetAllSCEVInLoopUnroll));
// The loop passes in LPM (LoopFullUnrollPass) do not preserve MemorySSA.
// *All* loop passes must preserve it, in order to be able to use it.
MainFPM.addPass(createFunctionToLoopPassAdaptor(
std::move(LPM), /*UseMemorySSA=*/false, /*UseBlockFrequencyInfo=*/true));
MainFPM.addPass(LoopDistributePass());
addVectorPasses(Level, MainFPM, /* IsLTO */ true);
invokePeepholeEPCallbacks(MainFPM, Level);
MainFPM.addPass(JumpThreadingPass(/*InsertFreezeWhenUnfoldingSelect*/ true));
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(MainFPM)));
// Create a function that performs CFI checks for cross-DSO calls with
// targets in the current module.
MPM.addPass(CrossDSOCFIPass());
// Lower type metadata and the type.test intrinsic. This pass supports
// clang's control flow integrity mechanisms (-fsanitize=cfi*) and needs
// to be run at link time if CFI is enabled. This pass does nothing if
// CFI is disabled.
MPM.addPass(LowerTypeTestsPass(ExportSummary, nullptr));
// Run a second time to clean up any type tests left behind by WPD for use
// in ICP (which is performed earlier than this in the regular LTO pipeline).
MPM.addPass(LowerTypeTestsPass(nullptr, nullptr, true));
// Enable splitting late in the FullLTO post-link pipeline. This is done in
// the same stage in the old pass manager (\ref addLateLTOOptimizationPasses).
if (EnableHotColdSplit)
MPM.addPass(HotColdSplittingPass());
// Add late LTO optimization passes.
// Delete basic blocks, which optimization passes may have killed.
MPM.addPass(createModuleToFunctionPassAdaptor(
SimplifyCFGPass(SimplifyCFGOptions().hoistCommonInsts(true))));
// Drop bodies of available eternally objects to improve GlobalDCE.
MPM.addPass(EliminateAvailableExternallyPass());
// Now that we have optimized the program, discard unreachable functions.
MPM.addPass(GlobalDCEPass());
if (PTO.MergeFunctions)
MPM.addPass(MergeFunctionsPass());
// Emit annotation remarks.
addAnnotationRemarksPass(MPM);
return MPM;
}
ModulePassManager PassBuilder::buildO0DefaultPipeline(OptimizationLevel Level,
bool LTOPreLink) {
assert(Level == OptimizationLevel::O0 &&
"buildO0DefaultPipeline should only be used with O0");
ModulePassManager MPM;
if (PGOOpt && (PGOOpt->Action == PGOOptions::IRInstr ||
PGOOpt->Action == PGOOptions::IRUse))
addPGOInstrPassesForO0(
MPM,
/* RunProfileGen */ (PGOOpt->Action == PGOOptions::IRInstr),
/* IsCS */ false, PGOOpt->ProfileFile, PGOOpt->ProfileRemappingFile);
for (auto &C : PipelineStartEPCallbacks)
C(MPM, Level);
for (auto &C : PipelineEarlySimplificationEPCallbacks)
C(MPM, Level);
// Build a minimal pipeline based on the semantics required by LLVM,
// which is just that always inlining occurs. Further, disable generating
// lifetime intrinsics to avoid enabling further optimizations during
// code generation.
// However, we need to insert lifetime intrinsics to avoid invalid access
// caused by multithreaded coroutines.
MPM.addPass(AlwaysInlinerPass(
/*InsertLifetimeIntrinsics=*/PTO.Coroutines));
if (PTO.MergeFunctions)
MPM.addPass(MergeFunctionsPass());
if (EnableMatrix)
MPM.addPass(
createModuleToFunctionPassAdaptor(LowerMatrixIntrinsicsPass(true)));
if (!CGSCCOptimizerLateEPCallbacks.empty()) {
CGSCCPassManager CGPM;
for (auto &C : CGSCCOptimizerLateEPCallbacks)
C(CGPM, Level);
if (!CGPM.isEmpty())
MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM)));
}
if (!LateLoopOptimizationsEPCallbacks.empty()) {
LoopPassManager LPM;
for (auto &C : LateLoopOptimizationsEPCallbacks)
C(LPM, Level);
if (!LPM.isEmpty()) {
MPM.addPass(createModuleToFunctionPassAdaptor(
createFunctionToLoopPassAdaptor(std::move(LPM))));
}
}
if (!LoopOptimizerEndEPCallbacks.empty()) {
LoopPassManager LPM;
for (auto &C : LoopOptimizerEndEPCallbacks)
C(LPM, Level);
if (!LPM.isEmpty()) {
MPM.addPass(createModuleToFunctionPassAdaptor(
createFunctionToLoopPassAdaptor(std::move(LPM))));
}
}
if (!ScalarOptimizerLateEPCallbacks.empty()) {
FunctionPassManager FPM;
for (auto &C : ScalarOptimizerLateEPCallbacks)
C(FPM, Level);
if (!FPM.isEmpty())
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
}
if (!VectorizerStartEPCallbacks.empty()) {
FunctionPassManager FPM;
for (auto &C : VectorizerStartEPCallbacks)
C(FPM, Level);
if (!FPM.isEmpty())
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
}
if (PTO.Coroutines) {
MPM.addPass(createModuleToFunctionPassAdaptor(CoroEarlyPass()));
CGSCCPassManager CGPM;
CGPM.addPass(CoroSplitPass());
CGPM.addPass(createCGSCCToFunctionPassAdaptor(CoroElidePass()));
MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM)));
MPM.addPass(createModuleToFunctionPassAdaptor(CoroCleanupPass()));
}
for (auto &C : OptimizerLastEPCallbacks)
C(MPM, Level);
if (LTOPreLink)
addRequiredLTOPreLinkPasses(MPM);
return MPM;
}
AAManager PassBuilder::buildDefaultAAPipeline() {
AAManager AA;
// The order in which these are registered determines their priority when
// being queried.
// First we register the basic alias analysis that provides the majority of
// per-function local AA logic. This is a stateless, on-demand local set of
// AA techniques.
AA.registerFunctionAnalysis<BasicAA>();
// Next we query fast, specialized alias analyses that wrap IR-embedded
// information about aliasing.
AA.registerFunctionAnalysis<ScopedNoAliasAA>();
AA.registerFunctionAnalysis<TypeBasedAA>();
// Add support for querying global aliasing information when available.
// Because the `AAManager` is a function analysis and `GlobalsAA` is a module
// analysis, all that the `AAManager` can do is query for any *cached*
// results from `GlobalsAA` through a readonly proxy.
AA.registerModuleAnalysis<GlobalsAA>();
// Add target-specific alias analyses.
if (TM)
TM->registerDefaultAliasAnalyses(AA);
return AA;
}
static Optional<int> parseRepeatPassName(StringRef Name) {
if (!Name.consume_front("repeat<") || !Name.consume_back(">"))
return None;
int Count;
if (Name.getAsInteger(0, Count) || Count <= 0)
return None;
return Count;
}
static Optional<int> parseDevirtPassName(StringRef Name) {
if (!Name.consume_front("devirt<") || !Name.consume_back(">"))
return None;
int Count;
if (Name.getAsInteger(0, Count) || Count < 0)
return None;
return Count;
}
static bool checkParametrizedPassName(StringRef Name, StringRef PassName) {
if (!Name.consume_front(PassName))
return false;
// normal pass name w/o parameters == default parameters
if (Name.empty())
return true;
return Name.startswith("<") && Name.endswith(">");
}
namespace {
/// This performs customized parsing of pass name with parameters.
///
/// We do not need parametrization of passes in textual pipeline very often,
/// yet on a rare occasion ability to specify parameters right there can be
/// useful.
///
/// \p Name - parameterized specification of a pass from a textual pipeline
/// is a string in a form of :
/// PassName '<' parameter-list '>'
///
/// Parameter list is being parsed by the parser callable argument, \p Parser,
/// It takes a string-ref of parameters and returns either StringError or a
/// parameter list in a form of a custom parameters type, all wrapped into
/// Expected<> template class.
///
template <typename ParametersParseCallableT>
auto parsePassParameters(ParametersParseCallableT &&Parser, StringRef Name,
StringRef PassName) -> decltype(Parser(StringRef{})) {
using ParametersT = typename decltype(Parser(StringRef{}))::value_type;
StringRef Params = Name;
if (!Params.consume_front(PassName)) {
assert(false &&
"unable to strip pass name from parametrized pass specification");
}
if (Params.empty())
return ParametersT{};
if (!Params.consume_front("<") || !Params.consume_back(">")) {
assert(false && "invalid format for parametrized pass name");
}
Expected<ParametersT> Result = Parser(Params);
assert((Result || Result.template errorIsA<StringError>()) &&
"Pass parameter parser can only return StringErrors.");
return Result;
}
/// Parser of parameters for LoopUnroll pass.
Expected<LoopUnrollOptions> parseLoopUnrollOptions(StringRef Params) {
LoopUnrollOptions UnrollOpts;
while (!Params.empty()) {
StringRef ParamName;
std::tie(ParamName, Params) = Params.split(';');
int OptLevel = StringSwitch<int>(ParamName)
.Case("O0", 0)
.Case("O1", 1)
.Case("O2", 2)
.Case("O3", 3)
.Default(-1);
if (OptLevel >= 0) {
UnrollOpts.setOptLevel(OptLevel);
continue;
}
if (ParamName.consume_front("full-unroll-max=")) {
int Count;
if (ParamName.getAsInteger(0, Count))
return make_error<StringError>(
formatv("invalid LoopUnrollPass parameter '{0}' ", ParamName).str(),
inconvertibleErrorCode());
UnrollOpts.setFullUnrollMaxCount(Count);
continue;
}
bool Enable = !ParamName.consume_front("no-");
if (ParamName == "partial") {
UnrollOpts.setPartial(Enable);
} else if (ParamName == "peeling") {
UnrollOpts.setPeeling(Enable);
} else if (ParamName == "profile-peeling") {
UnrollOpts.setProfileBasedPeeling(Enable);
} else if (ParamName == "runtime") {
UnrollOpts.setRuntime(Enable);
} else if (ParamName == "upperbound") {
UnrollOpts.setUpperBound(Enable);
} else {
return make_error<StringError>(
formatv("invalid LoopUnrollPass parameter '{0}' ", ParamName).str(),
inconvertibleErrorCode());
}
}
return UnrollOpts;
}
Expected<MemorySanitizerOptions> parseMSanPassOptions(StringRef Params) {
MemorySanitizerOptions Result;
while (!Params.empty()) {
StringRef ParamName;
std::tie(ParamName, Params) = Params.split(';');
if (ParamName == "recover") {
Result.Recover = true;
} else if (ParamName == "kernel") {
Result.Kernel = true;
} else if (ParamName.consume_front("track-origins=")) {
if (ParamName.getAsInteger(0, Result.TrackOrigins))
return make_error<StringError>(
formatv("invalid argument to MemorySanitizer pass track-origins "
"parameter: '{0}' ",
ParamName)
.str(),
inconvertibleErrorCode());
} else {
return make_error<StringError>(
formatv("invalid MemorySanitizer pass parameter '{0}' ", ParamName)
.str(),
inconvertibleErrorCode());
}
}
return Result;
}
/// Parser of parameters for SimplifyCFG pass.
Expected<SimplifyCFGOptions> parseSimplifyCFGOptions(StringRef Params) {
SimplifyCFGOptions Result;
while (!Params.empty()) {
StringRef ParamName;
std::tie(ParamName, Params) = Params.split(';');
bool Enable = !ParamName.consume_front("no-");
if (ParamName == "forward-switch-cond") {
Result.forwardSwitchCondToPhi(Enable);
} else if (ParamName == "switch-to-lookup") {
Result.convertSwitchToLookupTable(Enable);
} else if (ParamName == "keep-loops") {
Result.needCanonicalLoops(Enable);
} else if (ParamName == "hoist-common-insts") {
Result.hoistCommonInsts(Enable);
} else if (ParamName == "sink-common-insts") {
Result.sinkCommonInsts(Enable);
} else if (Enable && ParamName.consume_front("bonus-inst-threshold=")) {
APInt BonusInstThreshold;
if (ParamName.getAsInteger(0, BonusInstThreshold))
return make_error<StringError>(
formatv("invalid argument to SimplifyCFG pass bonus-threshold "
"parameter: '{0}' ",
ParamName).str(),
inconvertibleErrorCode());
Result.bonusInstThreshold(BonusInstThreshold.getSExtValue());
} else {
return make_error<StringError>(
formatv("invalid SimplifyCFG pass parameter '{0}' ", ParamName).str(),
inconvertibleErrorCode());
}
}
return Result;
}
/// Parser of parameters for LoopVectorize pass.
Expected<LoopVectorizeOptions> parseLoopVectorizeOptions(StringRef Params) {
LoopVectorizeOptions Opts;
while (!Params.empty()) {
StringRef ParamName;
std::tie(ParamName, Params) = Params.split(';');
bool Enable = !ParamName.consume_front("no-");
if (ParamName == "interleave-forced-only") {
Opts.setInterleaveOnlyWhenForced(Enable);
} else if (ParamName == "vectorize-forced-only") {
Opts.setVectorizeOnlyWhenForced(Enable);
} else {
return make_error<StringError>(
formatv("invalid LoopVectorize parameter '{0}' ", ParamName).str(),
inconvertibleErrorCode());
}
}
return Opts;
}
Expected<bool> parseLoopUnswitchOptions(StringRef Params) {
bool Result = false;
while (!Params.empty()) {
StringRef ParamName;
std::tie(ParamName, Params) = Params.split(';');
bool Enable = !ParamName.consume_front("no-");
if (ParamName == "nontrivial") {
Result = Enable;
} else {
return make_error<StringError>(
formatv("invalid LoopUnswitch pass parameter '{0}' ", ParamName)
.str(),
inconvertibleErrorCode());
}
}
return Result;
}
Expected<bool> parseMergedLoadStoreMotionOptions(StringRef Params) {
bool Result = false;
while (!Params.empty()) {
StringRef ParamName;
std::tie(ParamName, Params) = Params.split(';');
bool Enable = !ParamName.consume_front("no-");
if (ParamName == "split-footer-bb") {
Result = Enable;
} else {
return make_error<StringError>(
formatv("invalid MergedLoadStoreMotion pass parameter '{0}' ",
ParamName)
.str(),
inconvertibleErrorCode());
}
}
return Result;
}
Expected<GVNOptions> parseGVNOptions(StringRef Params) {
GVNOptions Result;
while (!Params.empty()) {
StringRef ParamName;
std::tie(ParamName, Params) = Params.split(';');
bool Enable = !ParamName.consume_front("no-");
if (ParamName == "pre") {
Result.setPRE(Enable);
} else if (ParamName == "load-pre") {
Result.setLoadPRE(Enable);
} else if (ParamName == "split-backedge-load-pre") {
Result.setLoadPRESplitBackedge(Enable);
} else if (ParamName == "memdep") {
Result.setMemDep(Enable);
} else {
return make_error<StringError>(
formatv("invalid GVN pass parameter '{0}' ", ParamName).str(),
inconvertibleErrorCode());
}
}
return Result;
}
Expected<StackLifetime::LivenessType>
parseStackLifetimeOptions(StringRef Params) {
StackLifetime::LivenessType Result = StackLifetime::LivenessType::May;
while (!Params.empty()) {
StringRef ParamName;
std::tie(ParamName, Params) = Params.split(';');
if (ParamName == "may") {
Result = StackLifetime::LivenessType::May;
} else if (ParamName == "must") {
Result = StackLifetime::LivenessType::Must;
} else {
return make_error<StringError>(
formatv("invalid StackLifetime parameter '{0}' ", ParamName).str(),
inconvertibleErrorCode());
}
}
return Result;
}
} // namespace
/// Tests whether a pass name starts with a valid prefix for a default pipeline
/// alias.
static bool startsWithDefaultPipelineAliasPrefix(StringRef Name) {
return Name.startswith("default") || Name.startswith("thinlto") ||
Name.startswith("lto");
}
/// Tests whether registered callbacks will accept a given pass name.
///
/// When parsing a pipeline text, the type of the outermost pipeline may be
/// omitted, in which case the type is automatically determined from the first
/// pass name in the text. This may be a name that is handled through one of the
/// callbacks. We check this through the oridinary parsing callbacks by setting
/// up a dummy PassManager in order to not force the client to also handle this
/// type of query.
template <typename PassManagerT, typename CallbacksT>
static bool callbacksAcceptPassName(StringRef Name, CallbacksT &Callbacks) {
if (!Callbacks.empty()) {
PassManagerT DummyPM;
for (auto &CB : Callbacks)
if (CB(Name, DummyPM, {}))
return true;
}
return false;
}
template <typename CallbacksT>
static bool isModulePassName(StringRef Name, CallbacksT &Callbacks) {
// Manually handle aliases for pre-configured pipeline fragments.
if (startsWithDefaultPipelineAliasPrefix(Name))
return DefaultAliasRegex.match(Name);
// Explicitly handle pass manager names.
if (Name == "module")
return true;
if (Name == "cgscc")
return true;
if (Name == "function")
return true;
// Explicitly handle custom-parsed pass names.
if (parseRepeatPassName(Name))
return true;
#define MODULE_PASS(NAME, CREATE_PASS) \
if (Name == NAME) \
return true;
#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">") \
return true;
#include "PassRegistry.def"
return callbacksAcceptPassName<ModulePassManager>(Name, Callbacks);
}
template <typename CallbacksT>
static bool isCGSCCPassName(StringRef Name, CallbacksT &Callbacks) {
// Explicitly handle pass manager names.
if (Name == "cgscc")
return true;
if (Name == "function")
return true;
// Explicitly handle custom-parsed pass names.
if (parseRepeatPassName(Name))
return true;
if (parseDevirtPassName(Name))
return true;
#define CGSCC_PASS(NAME, CREATE_PASS) \
if (Name == NAME) \
return true;
#define CGSCC_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">") \
return true;
#include "PassRegistry.def"
return callbacksAcceptPassName<CGSCCPassManager>(Name, Callbacks);
}
template <typename CallbacksT>
static bool isFunctionPassName(StringRef Name, CallbacksT &Callbacks) {
// Explicitly handle pass manager names.
if (Name == "function")
return true;
if (Name == "loop" || Name == "loop-mssa")
return true;
// Explicitly handle custom-parsed pass names.
if (parseRepeatPassName(Name))
return true;
#define FUNCTION_PASS(NAME, CREATE_PASS) \
if (Name == NAME) \
return true;
#define FUNCTION_PASS_WITH_PARAMS(NAME, CREATE_PASS, PARSER) \
if (checkParametrizedPassName(Name, NAME)) \
return true;
#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">") \
return true;
#include "PassRegistry.def"
return callbacksAcceptPassName<FunctionPassManager>(Name, Callbacks);
}
template <typename CallbacksT>
static bool isLoopPassName(StringRef Name, CallbacksT &Callbacks) {
// Explicitly handle pass manager names.
if (Name == "loop" || Name == "loop-mssa")
return true;
// Explicitly handle custom-parsed pass names.
if (parseRepeatPassName(Name))
return true;
#define LOOP_PASS(NAME, CREATE_PASS) \
if (Name == NAME) \
return true;
#define LOOP_PASS_WITH_PARAMS(NAME, CREATE_PASS, PARSER) \
if (checkParametrizedPassName(Name, NAME)) \
return true;
#define LOOP_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">") \
return true;
#include "PassRegistry.def"
return callbacksAcceptPassName<LoopPassManager>(Name, Callbacks);
}
Optional<std::vector<PassBuilder::PipelineElement>>
PassBuilder::parsePipelineText(StringRef Text) {
std::vector<PipelineElement> ResultPipeline;
SmallVector<std::vector<PipelineElement> *, 4> PipelineStack = {
&ResultPipeline};
for (;;) {
std::vector<PipelineElement> &Pipeline = *PipelineStack.back();
size_t Pos = Text.find_first_of(",()");
Pipeline.push_back({Text.substr(0, Pos), {}});
// If we have a single terminating name, we're done.
if (Pos == Text.npos)
break;
char Sep = Text[Pos];
Text = Text.substr(Pos + 1);
if (Sep == ',')
// Just a name ending in a comma, continue.
continue;
if (Sep == '(') {
// Push the inner pipeline onto the stack to continue processing.
PipelineStack.push_back(&Pipeline.back().InnerPipeline);
continue;
}
assert(Sep == ')' && "Bogus separator!");
// When handling the close parenthesis, we greedily consume them to avoid
// empty strings in the pipeline.
do {
// If we try to pop the outer pipeline we have unbalanced parentheses.
if (PipelineStack.size() == 1)
return None;
PipelineStack.pop_back();
} while (Text.consume_front(")"));
// Check if we've finished parsing.
if (Text.empty())
break;
// Otherwise, the end of an inner pipeline always has to be followed by
// a comma, and then we can continue.
if (!Text.consume_front(","))
return None;
}
if (PipelineStack.size() > 1)
// Unbalanced paretheses.
return None;
assert(PipelineStack.back() == &ResultPipeline &&
"Wrong pipeline at the bottom of the stack!");
return {std::move(ResultPipeline)};
}
Error PassBuilder::parseModulePass(ModulePassManager &MPM,
const PipelineElement &E) {
auto &Name = E.Name;
auto &InnerPipeline = E.InnerPipeline;
// First handle complex passes like the pass managers which carry pipelines.
if (!InnerPipeline.empty()) {
if (Name == "module") {
ModulePassManager NestedMPM;
if (auto Err = parseModulePassPipeline(NestedMPM, InnerPipeline))
return Err;
MPM.addPass(std::move(NestedMPM));
return Error::success();
}
if (Name == "cgscc") {
CGSCCPassManager CGPM;
if (auto Err = parseCGSCCPassPipeline(CGPM, InnerPipeline))
return Err;
MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM)));
return Error::success();
}
if (Name == "function") {
FunctionPassManager FPM;
if (auto Err = parseFunctionPassPipeline(FPM, InnerPipeline))
return Err;
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
return Error::success();
}
if (auto Count = parseRepeatPassName(Name)) {
ModulePassManager NestedMPM;
if (auto Err = parseModulePassPipeline(NestedMPM, InnerPipeline))
return Err;
MPM.addPass(createRepeatedPass(*Count, std::move(NestedMPM)));
return Error::success();
}
for (auto &C : ModulePipelineParsingCallbacks)
if (C(Name, MPM, InnerPipeline))
return Error::success();
// Normal passes can't have pipelines.
return make_error<StringError>(
formatv("invalid use of '{0}' pass as module pipeline", Name).str(),
inconvertibleErrorCode());
;
}
// Manually handle aliases for pre-configured pipeline fragments.
if (startsWithDefaultPipelineAliasPrefix(Name)) {
SmallVector<StringRef, 3> Matches;
if (!DefaultAliasRegex.match(Name, &Matches))
return make_error<StringError>(
formatv("unknown default pipeline alias '{0}'", Name).str(),
inconvertibleErrorCode());
assert(Matches.size() == 3 && "Must capture two matched strings!");
OptimizationLevel L = StringSwitch<OptimizationLevel>(Matches[2])
.Case("O0", OptimizationLevel::O0)
.Case("O1", OptimizationLevel::O1)
.Case("O2", OptimizationLevel::O2)
.Case("O3", OptimizationLevel::O3)
.Case("Os", OptimizationLevel::Os)
.Case("Oz", OptimizationLevel::Oz);
if (L == OptimizationLevel::O0 && Matches[1] != "thinlto" &&
Matches[1] != "lto") {
MPM.addPass(buildO0DefaultPipeline(L, Matches[1] == "thinlto-pre-link" ||
Matches[1] == "lto-pre-link"));
return Error::success();
}
// This is consistent with old pass manager invoked via opt, but
// inconsistent with clang. Clang doesn't enable loop vectorization
// but does enable slp vectorization at Oz.
PTO.LoopVectorization =
L.getSpeedupLevel() > 1 && L != OptimizationLevel::Oz;
PTO.SLPVectorization =
L.getSpeedupLevel() > 1 && L != OptimizationLevel::Oz;
if (Matches[1] == "default") {
MPM.addPass(buildPerModuleDefaultPipeline(L));
} else if (Matches[1] == "thinlto-pre-link") {
MPM.addPass(buildThinLTOPreLinkDefaultPipeline(L));
} else if (Matches[1] == "thinlto") {
MPM.addPass(buildThinLTODefaultPipeline(L, nullptr));
} else if (Matches[1] == "lto-pre-link") {
MPM.addPass(buildLTOPreLinkDefaultPipeline(L));
} else {
assert(Matches[1] == "lto" && "Not one of the matched options!");
MPM.addPass(buildLTODefaultPipeline(L, nullptr));
}
return Error::success();
}
// Finally expand the basic registered passes from the .inc file.
#define MODULE_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
MPM.addPass(CREATE_PASS); \
return Error::success(); \
}
#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">") { \
MPM.addPass( \
RequireAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type, Module>()); \
return Error::success(); \
} \
if (Name == "invalidate<" NAME ">") { \
MPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return Error::success(); \
}
#define CGSCC_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(CREATE_PASS)); \
return Error::success(); \
}
#define FUNCTION_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
MPM.addPass(createModuleToFunctionPassAdaptor(CREATE_PASS)); \
return Error::success(); \
}
#define FUNCTION_PASS_WITH_PARAMS(NAME, CREATE_PASS, PARSER) \
if (checkParametrizedPassName(Name, NAME)) { \
auto Params = parsePassParameters(PARSER, Name, NAME); \
if (!Params) \
return Params.takeError(); \
MPM.addPass(createModuleToFunctionPassAdaptor(CREATE_PASS(Params.get()))); \
return Error::success(); \
}
#define LOOP_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
MPM.addPass(createModuleToFunctionPassAdaptor( \
createFunctionToLoopPassAdaptor(CREATE_PASS, false, false))); \
return Error::success(); \
}
#define LOOP_PASS_WITH_PARAMS(NAME, CREATE_PASS, PARSER) \
if (checkParametrizedPassName(Name, NAME)) { \
auto Params = parsePassParameters(PARSER, Name, NAME); \
if (!Params) \
return Params.takeError(); \
MPM.addPass( \
createModuleToFunctionPassAdaptor(createFunctionToLoopPassAdaptor( \
CREATE_PASS(Params.get()), false, false))); \
return Error::success(); \
}
#include "PassRegistry.def"
for (auto &C : ModulePipelineParsingCallbacks)
if (C(Name, MPM, InnerPipeline))
return Error::success();
return make_error<StringError>(
formatv("unknown module pass '{0}'", Name).str(),
inconvertibleErrorCode());
}
Error PassBuilder::parseCGSCCPass(CGSCCPassManager &CGPM,
const PipelineElement &E) {
auto &Name = E.Name;
auto &InnerPipeline = E.InnerPipeline;
// First handle complex passes like the pass managers which carry pipelines.
if (!InnerPipeline.empty()) {
if (Name == "cgscc") {
CGSCCPassManager NestedCGPM;
if (auto Err = parseCGSCCPassPipeline(NestedCGPM, InnerPipeline))
return Err;
// Add the nested pass manager with the appropriate adaptor.
CGPM.addPass(std::move(NestedCGPM));
return Error::success();
}
if (Name == "function") {
FunctionPassManager FPM;
if (auto Err = parseFunctionPassPipeline(FPM, InnerPipeline))
return Err;
// Add the nested pass manager with the appropriate adaptor.
CGPM.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM)));
return Error::success();
}
if (auto Count = parseRepeatPassName(Name)) {
CGSCCPassManager NestedCGPM;
if (auto Err = parseCGSCCPassPipeline(NestedCGPM, InnerPipeline))
return Err;
CGPM.addPass(createRepeatedPass(*Count, std::move(NestedCGPM)));
return Error::success();
}
if (auto MaxRepetitions = parseDevirtPassName(Name)) {
CGSCCPassManager NestedCGPM;
if (auto Err = parseCGSCCPassPipeline(NestedCGPM, InnerPipeline))
return Err;
CGPM.addPass(
createDevirtSCCRepeatedPass(std::move(NestedCGPM), *MaxRepetitions));
return Error::success();
}
for (auto &C : CGSCCPipelineParsingCallbacks)
if (C(Name, CGPM, InnerPipeline))
return Error::success();
// Normal passes can't have pipelines.
return make_error<StringError>(
formatv("invalid use of '{0}' pass as cgscc pipeline", Name).str(),
inconvertibleErrorCode());
}
// Now expand the basic registered passes from the .inc file.
#define CGSCC_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
CGPM.addPass(CREATE_PASS); \
return Error::success(); \
}
#define CGSCC_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">") { \
CGPM.addPass(RequireAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type, \
LazyCallGraph::SCC, CGSCCAnalysisManager, LazyCallGraph &, \
CGSCCUpdateResult &>()); \
return Error::success(); \
} \
if (Name == "invalidate<" NAME ">") { \
CGPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return Error::success(); \
}
#define FUNCTION_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
CGPM.addPass(createCGSCCToFunctionPassAdaptor(CREATE_PASS)); \
return Error::success(); \
}
#define FUNCTION_PASS_WITH_PARAMS(NAME, CREATE_PASS, PARSER) \
if (checkParametrizedPassName(Name, NAME)) { \
auto Params = parsePassParameters(PARSER, Name, NAME); \
if (!Params) \
return Params.takeError(); \
CGPM.addPass(createCGSCCToFunctionPassAdaptor(CREATE_PASS(Params.get()))); \
return Error::success(); \
}
#define LOOP_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
CGPM.addPass(createCGSCCToFunctionPassAdaptor( \
createFunctionToLoopPassAdaptor(CREATE_PASS, false, false))); \
return Error::success(); \
}
#define LOOP_PASS_WITH_PARAMS(NAME, CREATE_PASS, PARSER) \
if (checkParametrizedPassName(Name, NAME)) { \
auto Params = parsePassParameters(PARSER, Name, NAME); \
if (!Params) \
return Params.takeError(); \
CGPM.addPass( \
createCGSCCToFunctionPassAdaptor(createFunctionToLoopPassAdaptor( \
CREATE_PASS(Params.get()), false, false))); \
return Error::success(); \
}
#include "PassRegistry.def"
for (auto &C : CGSCCPipelineParsingCallbacks)
if (C(Name, CGPM, InnerPipeline))
return Error::success();
return make_error<StringError>(
formatv("unknown cgscc pass '{0}'", Name).str(),
inconvertibleErrorCode());
}
Error PassBuilder::parseFunctionPass(FunctionPassManager &FPM,
const PipelineElement &E) {
auto &Name = E.Name;
auto &InnerPipeline = E.InnerPipeline;
// First handle complex passes like the pass managers which carry pipelines.
if (!InnerPipeline.empty()) {
if (Name == "function") {
FunctionPassManager NestedFPM;
if (auto Err = parseFunctionPassPipeline(NestedFPM, InnerPipeline))
return Err;
// Add the nested pass manager with the appropriate adaptor.
FPM.addPass(std::move(NestedFPM));
return Error::success();
}
if (Name == "loop" || Name == "loop-mssa") {
LoopPassManager LPM;
if (auto Err = parseLoopPassPipeline(LPM, InnerPipeline))
return Err;
// Add the nested pass manager with the appropriate adaptor.
bool UseMemorySSA = (Name == "loop-mssa");
bool UseBFI = llvm::any_of(
InnerPipeline, [](auto Pipeline) { return Pipeline.Name == "licm"; });
FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM), UseMemorySSA,
UseBFI));
return Error::success();
}
if (auto Count = parseRepeatPassName(Name)) {
FunctionPassManager NestedFPM;
if (auto Err = parseFunctionPassPipeline(NestedFPM, InnerPipeline))
return Err;
FPM.addPass(createRepeatedPass(*Count, std::move(NestedFPM)));
return Error::success();
}
for (auto &C : FunctionPipelineParsingCallbacks)
if (C(Name, FPM, InnerPipeline))
return Error::success();
// Normal passes can't have pipelines.
return make_error<StringError>(
formatv("invalid use of '{0}' pass as function pipeline", Name).str(),
inconvertibleErrorCode());
}
// Now expand the basic registered passes from the .inc file.
#define FUNCTION_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
FPM.addPass(CREATE_PASS); \
return Error::success(); \
}
#define FUNCTION_PASS_WITH_PARAMS(NAME, CREATE_PASS, PARSER) \
if (checkParametrizedPassName(Name, NAME)) { \
auto Params = parsePassParameters(PARSER, Name, NAME); \
if (!Params) \
return Params.takeError(); \
FPM.addPass(CREATE_PASS(Params.get())); \
return Error::success(); \
}
#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">") { \
FPM.addPass( \
RequireAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type, Function>()); \
return Error::success(); \
} \
if (Name == "invalidate<" NAME ">") { \
FPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return Error::success(); \
}
// FIXME: UseMemorySSA is set to false. Maybe we could do things like:
// bool UseMemorySSA = !("canon-freeze" || "loop-predication" ||
// "guard-widening");
// The risk is that it may become obsolete if we're not careful.
#define LOOP_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
FPM.addPass(createFunctionToLoopPassAdaptor(CREATE_PASS, false, false)); \
return Error::success(); \
}
#define LOOP_PASS_WITH_PARAMS(NAME, CREATE_PASS, PARSER) \
if (checkParametrizedPassName(Name, NAME)) { \
auto Params = parsePassParameters(PARSER, Name, NAME); \
if (!Params) \
return Params.takeError(); \
FPM.addPass(createFunctionToLoopPassAdaptor(CREATE_PASS(Params.get()), \
false, false)); \
return Error::success(); \
}
#include "PassRegistry.def"
for (auto &C : FunctionPipelineParsingCallbacks)
if (C(Name, FPM, InnerPipeline))
return Error::success();
return make_error<StringError>(
formatv("unknown function pass '{0}'", Name).str(),
inconvertibleErrorCode());
}
Error PassBuilder::parseLoopPass(LoopPassManager &LPM,
const PipelineElement &E) {
StringRef Name = E.Name;
auto &InnerPipeline = E.InnerPipeline;
// First handle complex passes like the pass managers which carry pipelines.
if (!InnerPipeline.empty()) {
if (Name == "loop") {
LoopPassManager NestedLPM;
if (auto Err = parseLoopPassPipeline(NestedLPM, InnerPipeline))
return Err;
// Add the nested pass manager with the appropriate adaptor.
LPM.addPass(std::move(NestedLPM));
return Error::success();
}
if (auto Count = parseRepeatPassName(Name)) {
LoopPassManager NestedLPM;
if (auto Err = parseLoopPassPipeline(NestedLPM, InnerPipeline))
return Err;
LPM.addPass(createRepeatedPass(*Count, std::move(NestedLPM)));
return Error::success();
}
for (auto &C : LoopPipelineParsingCallbacks)
if (C(Name, LPM, InnerPipeline))
return Error::success();
// Normal passes can't have pipelines.
return make_error<StringError>(
formatv("invalid use of '{0}' pass as loop pipeline", Name).str(),
inconvertibleErrorCode());
}
// Now expand the basic registered passes from the .inc file.
#define LOOP_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
LPM.addPass(CREATE_PASS); \
return Error::success(); \
}
#define LOOP_PASS_WITH_PARAMS(NAME, CREATE_PASS, PARSER) \
if (checkParametrizedPassName(Name, NAME)) { \
auto Params = parsePassParameters(PARSER, Name, NAME); \
if (!Params) \
return Params.takeError(); \
LPM.addPass(CREATE_PASS(Params.get())); \
return Error::success(); \
}
#define LOOP_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">") { \
LPM.addPass(RequireAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type, Loop, \
LoopAnalysisManager, LoopStandardAnalysisResults &, \
LPMUpdater &>()); \
return Error::success(); \
} \
if (Name == "invalidate<" NAME ">") { \
LPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return Error::success(); \
}
#include "PassRegistry.def"
for (auto &C : LoopPipelineParsingCallbacks)
if (C(Name, LPM, InnerPipeline))
return Error::success();
return make_error<StringError>(formatv("unknown loop pass '{0}'", Name).str(),
inconvertibleErrorCode());
}
bool PassBuilder::parseAAPassName(AAManager &AA, StringRef Name) {
#define MODULE_ALIAS_ANALYSIS(NAME, CREATE_PASS) \
if (Name == NAME) { \
AA.registerModuleAnalysis< \
std::remove_reference<decltype(CREATE_PASS)>::type>(); \
return true; \
}
#define FUNCTION_ALIAS_ANALYSIS(NAME, CREATE_PASS) \
if (Name == NAME) { \
AA.registerFunctionAnalysis< \
std::remove_reference<decltype(CREATE_PASS)>::type>(); \
return true; \
}
#include "PassRegistry.def"
for (auto &C : AAParsingCallbacks)
if (C(Name, AA))
return true;
return false;
}
Error PassBuilder::parseLoopPassPipeline(LoopPassManager &LPM,
ArrayRef<PipelineElement> Pipeline) {
for (const auto &Element : Pipeline) {
if (auto Err = parseLoopPass(LPM, Element))
return Err;
}
return Error::success();
}
Error PassBuilder::parseFunctionPassPipeline(
FunctionPassManager &FPM, ArrayRef<PipelineElement> Pipeline) {
for (const auto &Element : Pipeline) {
if (auto Err = parseFunctionPass(FPM, Element))
return Err;
}
return Error::success();
}
Error PassBuilder::parseCGSCCPassPipeline(CGSCCPassManager &CGPM,
ArrayRef<PipelineElement> Pipeline) {
for (const auto &Element : Pipeline) {
if (auto Err = parseCGSCCPass(CGPM, Element))
return Err;
}
return Error::success();
}
void PassBuilder::crossRegisterProxies(LoopAnalysisManager &LAM,
FunctionAnalysisManager &FAM,
CGSCCAnalysisManager &CGAM,
ModuleAnalysisManager &MAM) {
MAM.registerPass([&] { return FunctionAnalysisManagerModuleProxy(FAM); });
MAM.registerPass([&] { return CGSCCAnalysisManagerModuleProxy(CGAM); });
CGAM.registerPass([&] { return ModuleAnalysisManagerCGSCCProxy(MAM); });
FAM.registerPass([&] { return CGSCCAnalysisManagerFunctionProxy(CGAM); });
FAM.registerPass([&] { return ModuleAnalysisManagerFunctionProxy(MAM); });
FAM.registerPass([&] { return LoopAnalysisManagerFunctionProxy(LAM); });
LAM.registerPass([&] { return FunctionAnalysisManagerLoopProxy(FAM); });
}
Error PassBuilder::parseModulePassPipeline(ModulePassManager &MPM,
ArrayRef<PipelineElement> Pipeline) {
for (const auto &Element : Pipeline) {
if (auto Err = parseModulePass(MPM, Element))
return Err;
}
return Error::success();
}
// Primary pass pipeline description parsing routine for a \c ModulePassManager
// FIXME: Should this routine accept a TargetMachine or require the caller to
// pre-populate the analysis managers with target-specific stuff?
Error PassBuilder::parsePassPipeline(ModulePassManager &MPM,
StringRef PipelineText) {
auto Pipeline = parsePipelineText(PipelineText);
if (!Pipeline || Pipeline->empty())
return make_error<StringError>(
formatv("invalid pipeline '{0}'", PipelineText).str(),
inconvertibleErrorCode());
// If the first name isn't at the module layer, wrap the pipeline up
// automatically.
StringRef FirstName = Pipeline->front().Name;
if (!isModulePassName(FirstName, ModulePipelineParsingCallbacks)) {
if (isCGSCCPassName(FirstName, CGSCCPipelineParsingCallbacks)) {
Pipeline = {{"cgscc", std::move(*Pipeline)}};
} else if (isFunctionPassName(FirstName,
FunctionPipelineParsingCallbacks)) {
Pipeline = {{"function", std::move(*Pipeline)}};
} else if (isLoopPassName(FirstName, LoopPipelineParsingCallbacks)) {
Pipeline = {{"function", {{"loop", std::move(*Pipeline)}}}};
} else {
for (auto &C : TopLevelPipelineParsingCallbacks)
if (C(MPM, *Pipeline))
return Error::success();
// Unknown pass or pipeline name!
auto &InnerPipeline = Pipeline->front().InnerPipeline;
return make_error<StringError>(
formatv("unknown {0} name '{1}'",
(InnerPipeline.empty() ? "pass" : "pipeline"), FirstName)
.str(),
inconvertibleErrorCode());
}
}
if (auto Err = parseModulePassPipeline(MPM, *Pipeline))
return Err;
return Error::success();
}
// Primary pass pipeline description parsing routine for a \c CGSCCPassManager
Error PassBuilder::parsePassPipeline(CGSCCPassManager &CGPM,
StringRef PipelineText) {
auto Pipeline = parsePipelineText(PipelineText);
if (!Pipeline || Pipeline->empty())
return make_error<StringError>(
formatv("invalid pipeline '{0}'", PipelineText).str(),
inconvertibleErrorCode());
StringRef FirstName = Pipeline->front().Name;
if (!isCGSCCPassName(FirstName, CGSCCPipelineParsingCallbacks))
return make_error<StringError>(
formatv("unknown cgscc pass '{0}' in pipeline '{1}'", FirstName,
PipelineText)
.str(),
inconvertibleErrorCode());
if (auto Err = parseCGSCCPassPipeline(CGPM, *Pipeline))
return Err;
return Error::success();
}
// Primary pass pipeline description parsing routine for a \c
// FunctionPassManager
Error PassBuilder::parsePassPipeline(FunctionPassManager &FPM,
StringRef PipelineText) {
auto Pipeline = parsePipelineText(PipelineText);
if (!Pipeline || Pipeline->empty())
return make_error<StringError>(
formatv("invalid pipeline '{0}'", PipelineText).str(),
inconvertibleErrorCode());
StringRef FirstName = Pipeline->front().Name;
if (!isFunctionPassName(FirstName, FunctionPipelineParsingCallbacks))
return make_error<StringError>(
formatv("unknown function pass '{0}' in pipeline '{1}'", FirstName,
PipelineText)
.str(),
inconvertibleErrorCode());
if (auto Err = parseFunctionPassPipeline(FPM, *Pipeline))
return Err;
return Error::success();
}
// Primary pass pipeline description parsing routine for a \c LoopPassManager
Error PassBuilder::parsePassPipeline(LoopPassManager &CGPM,
StringRef PipelineText) {
auto Pipeline = parsePipelineText(PipelineText);
if (!Pipeline || Pipeline->empty())
return make_error<StringError>(
formatv("invalid pipeline '{0}'", PipelineText).str(),
inconvertibleErrorCode());
if (auto Err = parseLoopPassPipeline(CGPM, *Pipeline))
return Err;
return Error::success();
}
Error PassBuilder::parseAAPipeline(AAManager &AA, StringRef PipelineText) {
// If the pipeline just consists of the word 'default' just replace the AA
// manager with our default one.
if (PipelineText == "default") {
AA = buildDefaultAAPipeline();
return Error::success();
}
while (!PipelineText.empty()) {
StringRef Name;
std::tie(Name, PipelineText) = PipelineText.split(',');
if (!parseAAPassName(AA, Name))
return make_error<StringError>(
formatv("unknown alias analysis name '{0}'", Name).str(),
inconvertibleErrorCode());
}
return Error::success();
}
bool PassBuilder::isAAPassName(StringRef PassName) {
#define MODULE_ALIAS_ANALYSIS(NAME, CREATE_PASS) \
if (PassName == NAME) \
return true;
#define FUNCTION_ALIAS_ANALYSIS(NAME, CREATE_PASS) \
if (PassName == NAME) \
return true;
#include "PassRegistry.def"
return false;
}
bool PassBuilder::isAnalysisPassName(StringRef PassName) {
#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
if (PassName == NAME) \
return true;
#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
if (PassName == NAME) \
return true;
#define LOOP_ANALYSIS(NAME, CREATE_PASS) \
if (PassName == NAME) \
return true;
#define CGSCC_ANALYSIS(NAME, CREATE_PASS) \
if (PassName == NAME) \
return true;
#define MODULE_ALIAS_ANALYSIS(NAME, CREATE_PASS) \
if (PassName == NAME) \
return true;
#define FUNCTION_ALIAS_ANALYSIS(NAME, CREATE_PASS) \
if (PassName == NAME) \
return true;
#include "PassRegistry.def"
return false;
}
static void printPassName(StringRef PassName, raw_ostream &OS) {
OS << " " << PassName << "\n";
}
void PassBuilder::printPassNames(raw_ostream &OS) {
// TODO: print pass descriptions when they are available
OS << "Module passes:\n";
#define MODULE_PASS(NAME, CREATE_PASS) printPassName(NAME, OS);
#include "PassRegistry.def"
OS << "Module analyses:\n";
#define MODULE_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
#include "PassRegistry.def"
OS << "Module alias analyses:\n";
#define MODULE_ALIAS_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
#include "PassRegistry.def"
OS << "CGSCC passes:\n";
#define CGSCC_PASS(NAME, CREATE_PASS) printPassName(NAME, OS);
#include "PassRegistry.def"
OS << "CGSCC analyses:\n";
#define CGSCC_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
#include "PassRegistry.def"
OS << "Function passes:\n";
#define FUNCTION_PASS(NAME, CREATE_PASS) printPassName(NAME, OS);
#include "PassRegistry.def"
OS << "Function analyses:\n";
#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
#include "PassRegistry.def"
OS << "Function alias analyses:\n";
#define FUNCTION_ALIAS_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
#include "PassRegistry.def"
OS << "Loop passes:\n";
#define LOOP_PASS(NAME, CREATE_PASS) printPassName(NAME, OS);
#include "PassRegistry.def"
OS << "Loop analyses:\n";
#define LOOP_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
#include "PassRegistry.def"
}
void PassBuilder::registerParseTopLevelPipelineCallback(
const std::function<bool(ModulePassManager &, ArrayRef<PipelineElement>)>
&C) {
TopLevelPipelineParsingCallbacks.push_back(C);
}
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