blob: 1f638e7683078cc53726b8db60cf80726cca71cb [file] [log] [blame]
//===- Parsing, selection, and construction of pass pipelines -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \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/AliasAnalysis.h"
#include "llvm/Analysis/AliasAnalysisEvaluator.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/BasicAliasAnalysis.h"
#include "llvm/Analysis/BlockFrequencyInfo.h"
#include "llvm/Analysis/BlockFrequencyInfoImpl.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/DemandedBits.h"
#include "llvm/Analysis/DependenceAnalysis.h"
#include "llvm/Analysis/DominanceFrontier.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/IVUsers.h"
#include "llvm/Analysis/LazyCallGraph.h"
#include "llvm/Analysis/LazyValueInfo.h"
#include "llvm/Analysis/LoopAccessAnalysis.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/MemoryDependenceAnalysis.h"
#include "llvm/Analysis/MemorySSA.h"
#include "llvm/Analysis/ModuleSummaryAnalysis.h"
#include "llvm/Analysis/OptimizationDiagnosticInfo.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/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Analysis/TypeBasedAliasAnalysis.h"
#include "llvm/CodeGen/PreISelIntrinsicLowering.h"
#include "llvm/CodeGen/UnreachableBlockElim.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/IRPrintingPasses.h"
#include "llvm/IR/PassManager.h"
#include "llvm/IR/Verifier.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Regex.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/GCOVProfiler.h"
#include "llvm/Transforms/IPO/AlwaysInliner.h"
#include "llvm/Transforms/IPO/ArgumentPromotion.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/InferFunctionAttrs.h"
#include "llvm/Transforms/IPO/Inliner.h"
#include "llvm/Transforms/IPO/Internalize.h"
#include "llvm/Transforms/IPO/LowerTypeTests.h"
#include "llvm/Transforms/IPO/PartialInlining.h"
#include "llvm/Transforms/IPO/SCCP.h"
#include "llvm/Transforms/IPO/StripDeadPrototypes.h"
#include "llvm/Transforms/IPO/WholeProgramDevirt.h"
#include "llvm/Transforms/InstCombine/InstCombine.h"
#include "llvm/Transforms/InstrProfiling.h"
#include "llvm/Transforms/PGOInstrumentation.h"
#include "llvm/Transforms/SampleProfile.h"
#include "llvm/Transforms/Scalar/ADCE.h"
#include "llvm/Transforms/Scalar/AlignmentFromAssumptions.h"
#include "llvm/Transforms/Scalar/BDCE.h"
#include "llvm/Transforms/Scalar/ConstantHoisting.h"
#include "llvm/Transforms/Scalar/CorrelatedValuePropagation.h"
#include "llvm/Transforms/Scalar/DCE.h"
#include "llvm/Transforms/Scalar/DeadStoreElimination.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/JumpThreading.h"
#include "llvm/Transforms/Scalar/LICM.h"
#include "llvm/Transforms/Scalar/LoopAccessAnalysisPrinter.h"
#include "llvm/Transforms/Scalar/LoopDataPrefetch.h"
#include "llvm/Transforms/Scalar/LoopDeletion.h"
#include "llvm/Transforms/Scalar/LoopDistribute.h"
#include "llvm/Transforms/Scalar/LoopIdiomRecognize.h"
#include "llvm/Transforms/Scalar/LoopInstSimplify.h"
#include "llvm/Transforms/Scalar/LoopLoadElimination.h"
#include "llvm/Transforms/Scalar/LoopPassManager.h"
#include "llvm/Transforms/Scalar/LoopPredication.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/LoopUnrollPass.h"
#include "llvm/Transforms/Scalar/LowerAtomic.h"
#include "llvm/Transforms/Scalar/LowerExpectIntrinsic.h"
#include "llvm/Transforms/Scalar/LowerGuardIntrinsic.h"
#include "llvm/Transforms/Scalar/MemCpyOptimizer.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/SCCP.h"
#include "llvm/Transforms/Scalar/SROA.h"
#include "llvm/Transforms/Scalar/SimpleLoopUnswitch.h"
#include "llvm/Transforms/Scalar/SimplifyCFG.h"
#include "llvm/Transforms/Scalar/Sink.h"
#include "llvm/Transforms/Scalar/SpeculativeExecution.h"
#include "llvm/Transforms/Scalar/TailRecursionElimination.h"
#include "llvm/Transforms/Utils/AddDiscriminators.h"
#include "llvm/Transforms/Utils/BreakCriticalEdges.h"
#include "llvm/Transforms/Utils/LCSSA.h"
#include "llvm/Transforms/Utils/LibCallsShrinkWrap.h"
#include "llvm/Transforms/Utils/LoopSimplify.h"
#include "llvm/Transforms/Utils/LowerInvoke.h"
#include "llvm/Transforms/Utils/Mem2Reg.h"
#include "llvm/Transforms/Utils/NameAnonGlobals.h"
#include "llvm/Transforms/Utils/PredicateInfo.h"
#include "llvm/Transforms/Utils/SimplifyInstructions.h"
#include "llvm/Transforms/Utils/SymbolRewriter.h"
#include "llvm/Transforms/Vectorize/LoopVectorize.h"
#include "llvm/Transforms/Vectorize/SLPVectorizer.h"
#include <type_traits>
using namespace llvm;
static cl::opt<unsigned> MaxDevirtIterations("pm-max-devirt-iterations",
cl::ReallyHidden, cl::init(4));
static cl::opt<bool>
RunPartialInlining("enable-npm-partial-inlining", cl::init(false),
cl::Hidden, cl::ZeroOrMore,
cl::desc("Run Partial inlinining pass"));
static cl::opt<bool>
RunNewGVN("enable-npm-newgvn", cl::init(false),
cl::Hidden, cl::ZeroOrMore,
cl::desc("Run NewGVN instead of GVN"));
static cl::opt<bool> EnableGVNHoist(
"enable-npm-gvn-hoist", cl::init(false), cl::Hidden,
cl::desc("Enable the GVN hoisting pass for the new PM (default = off)"));
static cl::opt<bool> EnableGVNSink(
"enable-npm-gvn-sink", cl::init(false), cl::Hidden,
cl::desc("Enable the GVN hoisting pass for the new PM (default = off)"));
static Regex DefaultAliasRegex(
"^(default|thinlto-pre-link|thinlto|lto-pre-link|lto)<(O[0123sz])>$");
static bool isOptimizingForSize(PassBuilder::OptimizationLevel Level) {
switch (Level) {
case PassBuilder::O0:
case PassBuilder::O1:
case PassBuilder::O2:
case PassBuilder::O3:
return false;
case PassBuilder::Os:
case PassBuilder::Oz:
return true;
}
llvm_unreachable("Invalid optimization level!");
}
namespace {
/// \brief No-op module pass which does nothing.
struct NoOpModulePass {
PreservedAnalyses run(Module &M, ModuleAnalysisManager &) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpModulePass"; }
};
/// \brief 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"; }
};
/// \brief No-op CGSCC pass which does nothing.
struct NoOpCGSCCPass {
PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &,
LazyCallGraph &, CGSCCUpdateResult &UR) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpCGSCCPass"; }
};
/// \brief 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"; }
};
/// \brief No-op function pass which does nothing.
struct NoOpFunctionPass {
PreservedAnalyses run(Function &F, FunctionAnalysisManager &) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpFunctionPass"; }
};
/// \brief 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"; }
};
/// \brief No-op loop pass which does nothing.
struct NoOpLoopPass {
PreservedAnalyses run(Loop &L, LoopAnalysisManager &,
LoopStandardAnalysisResults &, LPMUpdater &) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpLoopPass"; }
};
/// \brief 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;
} // End anonymous namespace.
void PassBuilder::registerModuleAnalyses(ModuleAnalysisManager &MAM) {
#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
MAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
}
void PassBuilder::registerCGSCCAnalyses(CGSCCAnalysisManager &CGAM) {
#define CGSCC_ANALYSIS(NAME, CREATE_PASS) \
CGAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
}
void PassBuilder::registerFunctionAnalyses(FunctionAnalysisManager &FAM) {
#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
FAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
}
void PassBuilder::registerLoopAnalyses(LoopAnalysisManager &LAM) {
#define LOOP_ANALYSIS(NAME, CREATE_PASS) \
LAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
}
FunctionPassManager
PassBuilder::buildFunctionSimplificationPipeline(OptimizationLevel Level,
bool DebugLogging) {
assert(Level != O0 && "Must request optimizations!");
FunctionPassManager FPM(DebugLogging);
// Form SSA out of local memory accesses after breaking apart aggregates into
// scalars.
FPM.addPass(SROA());
// Catch trivial redundancies
FPM.addPass(EarlyCSEPass());
// Hoisting of scalars and load expressions.
if (EnableGVNHoist)
FPM.addPass(GVNHoistPass());
// Global value numbering based sinking.
if (EnableGVNSink) {
FPM.addPass(GVNSinkPass());
FPM.addPass(SimplifyCFGPass());
}
// Speculative execution if the target has divergent branches; otherwise nop.
FPM.addPass(SpeculativeExecutionPass());
// Optimize based on known information about branches, and cleanup afterward.
FPM.addPass(JumpThreadingPass());
FPM.addPass(CorrelatedValuePropagationPass());
FPM.addPass(SimplifyCFGPass());
FPM.addPass(InstCombinePass());
if (!isOptimizingForSize(Level))
FPM.addPass(LibCallsShrinkWrapPass());
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 replaced by
// loop pass equivalenst but those aren't ready yet. Specifically,
// `SimplifyCFGPass` and `InstCombinePass` are used. We have
// `LoopSimplifyCFGPass` which isn't yet powerful enough, and the closest to
// the other we have is `LoopInstSimplify`.
LoopPassManager LPM1(DebugLogging), LPM2(DebugLogging);
// Rotate Loop - disable header duplication at -Oz
LPM1.addPass(LoopRotatePass(Level != Oz));
LPM1.addPass(LICMPass());
LPM1.addPass(SimpleLoopUnswitchPass());
LPM2.addPass(IndVarSimplifyPass());
LPM2.addPass(LoopIdiomRecognizePass());
LPM2.addPass(LoopDeletionPass());
// FIXME: The old pass manager has a hack to disable loop unrolling during
// ThinLTO when using sample PGO. Need to either fix it or port some
// workaround.
LPM2.addPass(LoopUnrollPass::createFull(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)));
FPM.addPass(SimplifyCFGPass());
FPM.addPass(InstCombinePass());
FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM2)));
// Eliminate redundancies.
if (Level != O1) {
// These passes add substantial compile time so skip them at O1.
FPM.addPass(MergedLoadStoreMotionPass());
if (RunNewGVN)
FPM.addPass(NewGVNPass());
else
FPM.addPass(GVN());
}
// 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());
// Re-consider control flow based optimizations after redundancy elimination,
// redo DCE, etc.
FPM.addPass(JumpThreadingPass());
FPM.addPass(CorrelatedValuePropagationPass());
FPM.addPass(DSEPass());
FPM.addPass(createFunctionToLoopPassAdaptor(LICMPass()));
// Finally, do an expensive DCE pass to catch all the dead code exposed by
// the simplifications and basic cleanup after all the simplifications.
FPM.addPass(ADCEPass());
FPM.addPass(SimplifyCFGPass());
FPM.addPass(InstCombinePass());
return FPM;
}
static void addPGOInstrPasses(ModulePassManager &MPM, bool DebugLogging,
PassBuilder::OptimizationLevel Level,
bool RunProfileGen, std::string ProfileGenFile,
std::string ProfileUseFile) {
// Generally running simplification passes and the inliner with an high
// threshold results in smaller executables, but there may be cases where
// the size grows, so let's be conservative here and skip this simplification
// at -Os/Oz.
if (!isOptimizingForSize(Level)) {
InlineParams IP;
// In the old pass manager, this is a cl::opt. Should still this be one?
IP.DefaultThreshold = 75;
// FIXME: The hint threshold has the same value used by the regular inliner.
// This should probably be lowered after performance testing.
// FIXME: this comment is cargo culted from the old pass manager, revisit).
IP.HintThreshold = 325;
CGSCCPassManager CGPipeline(DebugLogging);
CGPipeline.addPass(InlinerPass(IP));
FunctionPassManager FPM;
FPM.addPass(SROA());
FPM.addPass(EarlyCSEPass()); // Catch trivial redundancies.
FPM.addPass(SimplifyCFGPass()); // Merge & remove basic blocks.
FPM.addPass(InstCombinePass()); // Combine silly sequences.
// FIXME: Here the old pass manager inserts peephole extensions.
// Add them when they're supported.
CGPipeline.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM)));
MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPipeline)));
}
// 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) {
MPM.addPass(PGOInstrumentationGen());
// Add the profile lowering pass.
InstrProfOptions Options;
if (!ProfileGenFile.empty())
Options.InstrProfileOutput = ProfileGenFile;
MPM.addPass(InstrProfiling(Options));
}
if (!ProfileUseFile.empty())
MPM.addPass(PGOInstrumentationUse(ProfileUseFile));
}
ModulePassManager
PassBuilder::buildModuleSimplificationPipeline(OptimizationLevel Level,
bool DebugLogging) {
ModulePassManager MPM(DebugLogging);
// 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(DebugLogging);
EarlyFPM.addPass(SimplifyCFGPass());
EarlyFPM.addPass(SROA());
EarlyFPM.addPass(EarlyCSEPass());
EarlyFPM.addPass(LowerExpectIntrinsicPass());
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(EarlyFPM)));
// Interprocedural constant propagation now that basic cleanup has occured
// 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());
// 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 constand folding
// globals.
MPM.addPass(DeadArgumentEliminationPass());
// Create a small function pass pipeline to cleanup after all the global
// optimizations.
FunctionPassManager GlobalCleanupPM(DebugLogging);
GlobalCleanupPM.addPass(InstCombinePass());
GlobalCleanupPM.addPass(SimplifyCFGPass());
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(GlobalCleanupPM)));
// Add all the requested passes for PGO, if requested.
if (PGOOpt) {
assert(PGOOpt->RunProfileGen || PGOOpt->SamplePGO ||
!PGOOpt->ProfileUseFile.empty());
addPGOInstrPasses(MPM, DebugLogging, Level, PGOOpt->RunProfileGen,
PGOOpt->ProfileGenFile, PGOOpt->ProfileUseFile);
// Indirect call promotion that promotes intra-module targes only.
MPM.addPass(PGOIndirectCallPromotion(false, PGOOpt && PGOOpt->SamplePGO));
}
// Require the GlobalsAA analysis for the module so we can query it within
// the CGSCC pipeline.
MPM.addPass(RequireAnalysisPass<GlobalsAA, Module>());
// Require the ProfileSummaryAnalysis for the module so we can query it within
// the inliner pass.
MPM.addPass(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(DebugLogging);
// 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 first. The theory is that we are walking bottom-up and so
// the callees have already been fully optimized, and we want to inline them
// into the callers so that our optimizations can reflect that.
// FIXME; Customize the threshold based on optimization level.
MainCGPipeline.addPass(InlinerPass());
// 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 == O3)
MainCGPipeline.addPass(ArgumentPromotionPass());
// Lastly, add the core function simplification pipeline nested inside the
// CGSCC walk.
MainCGPipeline.addPass(createCGSCCToFunctionPassAdaptor(
buildFunctionSimplificationPipeline(Level, DebugLogging)));
// We wrap the CGSCC pipeline in a devirtualization repeater. This will try
// to detect when we devirtualize indirect calls and iterate the SCC passes
// in that case to try and catch knock-on inlining or function attrs
// opportunities. Then we add it to the module pipeline by walking the SCCs
// in postorder (or bottom-up).
MPM.addPass(
createModuleToPostOrderCGSCCPassAdaptor(createDevirtSCCRepeatedPass(
std::move(MainCGPipeline), MaxDevirtIterations, DebugLogging)));
return MPM;
}
ModulePassManager
PassBuilder::buildModuleOptimizationPipeline(OptimizationLevel Level,
bool DebugLogging) {
ModulePassManager MPM(DebugLogging);
// Optimize globals now that the module is fully simplified.
MPM.addPass(GlobalOptPass());
// 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.
MPM.addPass(EliminateAvailableExternallyPass());
// 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());
// 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(DebugLogging);
OptimizePM.addPass(Float2IntPass());
// 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.
// First rotate loops that may have been un-rotated by prior passes.
OptimizePM.addPass(createFunctionToLoopPassAdaptor(LoopRotatePass()));
// 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());
// Now run the core loop vectorizer.
OptimizePM.addPass(LoopVectorizePass());
// Eliminate loads by forwarding stores from the previous iteration to loads
// of the current iteration.
OptimizePM.addPass(LoopLoadEliminationPass());
// Cleanup after the loop optimization passes.
OptimizePM.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.
// Optimize parallel scalar instruction chains into SIMD instructions.
OptimizePM.addPass(SLPVectorizerPass());
// Cleanup after all of the vectorizers.
OptimizePM.addPass(SimplifyCFGPass());
OptimizePM.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.
OptimizePM.addPass(createFunctionToLoopPassAdaptor(LoopUnrollPass::create(Level)));
OptimizePM.addPass(InstCombinePass());
OptimizePM.addPass(RequireAnalysisPass<OptimizationRemarkEmitterAnalysis, Function>());
OptimizePM.addPass(createFunctionToLoopPassAdaptor(LICMPass()));
// Now that we've vectorized and unrolled loops, we may have more refined
// alignment information, try to re-derive it here.
OptimizePM.addPass(AlignmentFromAssumptionsPass());
// 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(InstSimplifierPass());
// 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());
// Add the core optimizing pipeline.
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(OptimizePM)));
// 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());
return MPM;
}
ModulePassManager
PassBuilder::buildPerModuleDefaultPipeline(OptimizationLevel Level,
bool DebugLogging) {
assert(Level != O0 && "Must request optimizations for the default pipeline!");
ModulePassManager MPM(DebugLogging);
// 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, DebugLogging));
// Now add the optimization pipeline.
MPM.addPass(buildModuleOptimizationPipeline(Level, DebugLogging));
return MPM;
}
ModulePassManager
PassBuilder::buildThinLTOPreLinkDefaultPipeline(OptimizationLevel Level,
bool DebugLogging) {
assert(Level != O0 && "Must request optimizations for the default pipeline!");
ModulePassManager MPM(DebugLogging);
// Force any function attributes we want the rest of the pipeline to observe.
MPM.addPass(ForceFunctionAttrsPass());
// 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, DebugLogging));
// 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());
// Rename anon globals to be able to export them in the summary.
MPM.addPass(NameAnonGlobalPass());
return MPM;
}
ModulePassManager
PassBuilder::buildThinLTODefaultPipeline(OptimizationLevel Level,
bool DebugLogging) {
// FIXME: The summary index is not hooked in the new pass manager yet.
// When it's going to be hooked, enable WholeProgramDevirt and LowerTypeTest
// here.
ModulePassManager MPM(DebugLogging);
// Force any function attributes we want the rest of the pipeline to observe.
MPM.addPass(ForceFunctionAttrsPass());
// During the ThinLTO backend phase we perform early indirect call promotion
// here, before globalopt. Otherwise imported available_externally functions
// look unreferenced and are removed.
MPM.addPass(PGOIndirectCallPromotion(true /* InLTO */,
PGOOpt && PGOOpt->SamplePGO &&
!PGOOpt->ProfileUseFile.empty()));
// Add the core simplification pipeline.
MPM.addPass(buildModuleSimplificationPipeline(Level, DebugLogging));
// Now add the optimization pipeline.
MPM.addPass(buildModuleOptimizationPipeline(Level, DebugLogging));
return MPM;
}
ModulePassManager
PassBuilder::buildLTOPreLinkDefaultPipeline(OptimizationLevel Level,
bool DebugLogging) {
assert(Level != O0 && "Must request optimizations for the default pipeline!");
// FIXME: We should use a customized pre-link pipeline!
return buildPerModuleDefaultPipeline(Level, DebugLogging);
}
ModulePassManager PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level,
bool DebugLogging) {
assert(Level != O0 && "Must request optimizations for the default pipeline!");
ModulePassManager MPM(DebugLogging);
// 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 > 1) {
// 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->SamplePGO));
// 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());
}
// 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 inragne 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());
// Stop here at -O1.
if (Level == 1)
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.
// FIXME: add peephole extensions here as the legacy PM does.
MPM.addPass(createModuleToFunctionPassAdaptor(InstCombinePass()));
// 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(createModuleToPostOrderCGSCCPassAdaptor(InlinerPass()));
// 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(DebugLogging);
// The IPO Passes may leave cruft around. Clean up after them.
// FIXME: add peephole extensions here as the legacy PM does.
FPM.addPass(InstCombinePass());
FPM.addPass(JumpThreadingPass());
// Break up allocas
FPM.addPass(SROA());
// Run a few AA driver optimizations here and now to cleanup the code.
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(
PostOrderFunctionAttrsPass()));
// FIXME: here we run IP alias analysis in the legacy PM.
FunctionPassManager MainFPM;
// FIXME: once we fix LoopPass Manager, add LICM here.
// FIXME: once we provide support for enabling MLSM, add it here.
// FIXME: once we provide support for enabling NewGVN, add it here.
if (RunNewGVN)
MainFPM.addPass(NewGVNPass());
else
MainFPM.addPass(GVN());
// Remove dead memcpy()'s.
MainFPM.addPass(MemCpyOptPass());
// Nuke dead stores.
MainFPM.addPass(DSEPass());
// FIXME: at this point, we run a bunch of loop passes:
// indVarSimplify, loopDeletion, loopInterchange, loopUnrool,
// loopVectorize. Enable them once the remaining issue with LPM
// are sorted out.
MainFPM.addPass(InstCombinePass());
MainFPM.addPass(SimplifyCFGPass());
MainFPM.addPass(SCCPPass());
MainFPM.addPass(InstCombinePass());
MainFPM.addPass(BDCEPass());
// FIXME: We may want to run SLPVectorizer here.
// After vectorization, assume intrinsics may tell us more
// about pointer alignments.
#if 0
MainFPM.add(AlignmentFromAssumptionsPass());
#endif
// FIXME: Conditionally run LoadCombine here, after it's ported
// (in case we still have this pass, given its questionable usefulness).
// FIXME: add peephole extensions to the PM here.
MainFPM.addPass(InstCombinePass());
MainFPM.addPass(JumpThreadingPass());
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.
// Enable once we add support for the summary in the new PM.
#if 0
MPM.addPass(LowerTypeTestsPass(Summary ? PassSummaryAction::Export :
PassSummaryAction::None,
Summary));
#endif
// Add late LTO optimization passes.
// Delete basic blocks, which optimization passes may have killed.
MPM.addPass(createModuleToFunctionPassAdaptor(SimplifyCFGPass()));
// 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());
// FIXME: Enable MergeFuncs, conditionally, after ported, maybe.
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>();
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;
}
/// 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");
}
static bool isModulePassName(StringRef Name) {
// 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 false;
}
static bool isCGSCCPassName(StringRef Name) {
// 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 false;
}
static bool isFunctionPassName(StringRef Name) {
// Explicitly handle pass manager names.
if (Name == "function")
return true;
if (Name == "loop")
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_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">") \
return true;
#include "PassRegistry.def"
return false;
}
static bool isLoopPassName(StringRef Name) {
// Explicitly handle pass manager names.
if (Name == "loop")
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_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">") \
return true;
#include "PassRegistry.def"
return false;
}
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)};
}
bool PassBuilder::parseModulePass(ModulePassManager &MPM,
const PipelineElement &E, bool VerifyEachPass,
bool DebugLogging) {
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(DebugLogging);
if (!parseModulePassPipeline(NestedMPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
MPM.addPass(std::move(NestedMPM));
return true;
}
if (Name == "cgscc") {
CGSCCPassManager CGPM(DebugLogging);
if (!parseCGSCCPassPipeline(CGPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM),
DebugLogging));
return true;
}
if (Name == "function") {
FunctionPassManager FPM(DebugLogging);
if (!parseFunctionPassPipeline(FPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
return true;
}
if (auto Count = parseRepeatPassName(Name)) {
ModulePassManager NestedMPM(DebugLogging);
if (!parseModulePassPipeline(NestedMPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
MPM.addPass(createRepeatedPass(*Count, std::move(NestedMPM)));
return true;
}
// Normal passes can't have pipelines.
return false;
}
// Manually handle aliases for pre-configured pipeline fragments.
if (startsWithDefaultPipelineAliasPrefix(Name)) {
SmallVector<StringRef, 3> Matches;
if (!DefaultAliasRegex.match(Name, &Matches))
return false;
assert(Matches.size() == 3 && "Must capture two matched strings!");
OptimizationLevel L = StringSwitch<OptimizationLevel>(Matches[2])
.Case("O0", O0)
.Case("O1", O1)
.Case("O2", O2)
.Case("O3", O3)
.Case("Os", Os)
.Case("Oz", Oz);
if (L == O0)
// At O0 we do nothing at all!
return true;
if (Matches[1] == "default") {
MPM.addPass(buildPerModuleDefaultPipeline(L, DebugLogging));
} else if (Matches[1] == "thinlto-pre-link") {
MPM.addPass(buildThinLTOPreLinkDefaultPipeline(L, DebugLogging));
} else if (Matches[1] == "thinlto") {
MPM.addPass(buildThinLTODefaultPipeline(L, DebugLogging));
} else if (Matches[1] == "lto-pre-link") {
MPM.addPass(buildLTOPreLinkDefaultPipeline(L, DebugLogging));
} else {
assert(Matches[1] == "lto" && "Not one of the matched options!");
MPM.addPass(buildLTODefaultPipeline(L, DebugLogging));
}
return true;
}
// Finally expand the basic registered passes from the .inc file.
#define MODULE_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
MPM.addPass(CREATE_PASS); \
return true; \
}
#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">") { \
MPM.addPass( \
RequireAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type, Module>()); \
return true; \
} \
if (Name == "invalidate<" NAME ">") { \
MPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return true; \
}
#include "PassRegistry.def"
return false;
}
bool PassBuilder::parseCGSCCPass(CGSCCPassManager &CGPM,
const PipelineElement &E, bool VerifyEachPass,
bool DebugLogging) {
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(DebugLogging);
if (!parseCGSCCPassPipeline(NestedCGPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
// Add the nested pass manager with the appropriate adaptor.
CGPM.addPass(std::move(NestedCGPM));
return true;
}
if (Name == "function") {
FunctionPassManager FPM(DebugLogging);
if (!parseFunctionPassPipeline(FPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
// Add the nested pass manager with the appropriate adaptor.
CGPM.addPass(
createCGSCCToFunctionPassAdaptor(std::move(FPM), DebugLogging));
return true;
}
if (auto Count = parseRepeatPassName(Name)) {
CGSCCPassManager NestedCGPM(DebugLogging);
if (!parseCGSCCPassPipeline(NestedCGPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
CGPM.addPass(createRepeatedPass(*Count, std::move(NestedCGPM)));
return true;
}
if (auto MaxRepetitions = parseDevirtPassName(Name)) {
CGSCCPassManager NestedCGPM(DebugLogging);
if (!parseCGSCCPassPipeline(NestedCGPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
CGPM.addPass(createDevirtSCCRepeatedPass(std::move(NestedCGPM),
*MaxRepetitions, DebugLogging));
return true;
}
// Normal passes can't have pipelines.
return false;
}
// Now expand the basic registered passes from the .inc file.
#define CGSCC_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
CGPM.addPass(CREATE_PASS); \
return true; \
}
#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 true; \
} \
if (Name == "invalidate<" NAME ">") { \
CGPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return true; \
}
#include "PassRegistry.def"
return false;
}
bool PassBuilder::parseFunctionPass(FunctionPassManager &FPM,
const PipelineElement &E,
bool VerifyEachPass, bool DebugLogging) {
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(DebugLogging);
if (!parseFunctionPassPipeline(NestedFPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
// Add the nested pass manager with the appropriate adaptor.
FPM.addPass(std::move(NestedFPM));
return true;
}
if (Name == "loop") {
LoopPassManager LPM(DebugLogging);
if (!parseLoopPassPipeline(LPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
// Add the nested pass manager with the appropriate adaptor.
FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM)));
return true;
}
if (auto Count = parseRepeatPassName(Name)) {
FunctionPassManager NestedFPM(DebugLogging);
if (!parseFunctionPassPipeline(NestedFPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
FPM.addPass(createRepeatedPass(*Count, std::move(NestedFPM)));
return true;
}
// Normal passes can't have pipelines.
return false;
}
// Now expand the basic registered passes from the .inc file.
#define FUNCTION_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
FPM.addPass(CREATE_PASS); \
return true; \
}
#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">") { \
FPM.addPass( \
RequireAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type, Function>()); \
return true; \
} \
if (Name == "invalidate<" NAME ">") { \
FPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return true; \
}
#include "PassRegistry.def"
return false;
}
bool PassBuilder::parseLoopPass(LoopPassManager &LPM, const PipelineElement &E,
bool VerifyEachPass, bool DebugLogging) {
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(DebugLogging);
if (!parseLoopPassPipeline(NestedLPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
// Add the nested pass manager with the appropriate adaptor.
LPM.addPass(std::move(NestedLPM));
return true;
}
if (auto Count = parseRepeatPassName(Name)) {
LoopPassManager NestedLPM(DebugLogging);
if (!parseLoopPassPipeline(NestedLPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
LPM.addPass(createRepeatedPass(*Count, std::move(NestedLPM)));
return true;
}
// Normal passes can't have pipelines.
return false;
}
// Now expand the basic registered passes from the .inc file.
#define LOOP_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
LPM.addPass(CREATE_PASS); \
return true; \
}
#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 true; \
} \
if (Name == "invalidate<" NAME ">") { \
LPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return true; \
}
#include "PassRegistry.def"
return false;
}
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"
return false;
}
bool PassBuilder::parseLoopPassPipeline(LoopPassManager &LPM,
ArrayRef<PipelineElement> Pipeline,
bool VerifyEachPass,
bool DebugLogging) {
for (const auto &Element : Pipeline) {
if (!parseLoopPass(LPM, Element, VerifyEachPass, DebugLogging))
return false;
// FIXME: No verifier support for Loop passes!
}
return true;
}
bool PassBuilder::parseFunctionPassPipeline(FunctionPassManager &FPM,
ArrayRef<PipelineElement> Pipeline,
bool VerifyEachPass,
bool DebugLogging) {
for (const auto &Element : Pipeline) {
if (!parseFunctionPass(FPM, Element, VerifyEachPass, DebugLogging))
return false;
if (VerifyEachPass)
FPM.addPass(VerifierPass());
}
return true;
}
bool PassBuilder::parseCGSCCPassPipeline(CGSCCPassManager &CGPM,
ArrayRef<PipelineElement> Pipeline,
bool VerifyEachPass,
bool DebugLogging) {
for (const auto &Element : Pipeline) {
if (!parseCGSCCPass(CGPM, Element, VerifyEachPass, DebugLogging))
return false;
// FIXME: No verifier support for CGSCC passes!
}
return true;
}
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); });
}
bool PassBuilder::parseModulePassPipeline(ModulePassManager &MPM,
ArrayRef<PipelineElement> Pipeline,
bool VerifyEachPass,
bool DebugLogging) {
for (const auto &Element : Pipeline) {
if (!parseModulePass(MPM, Element, VerifyEachPass, DebugLogging))
return false;
if (VerifyEachPass)
MPM.addPass(VerifierPass());
}
return true;
}
// Primary pass pipeline description parsing routine.
// FIXME: Should this routine accept a TargetMachine or require the caller to
// pre-populate the analysis managers with target-specific stuff?
bool PassBuilder::parsePassPipeline(ModulePassManager &MPM,
StringRef PipelineText, bool VerifyEachPass,
bool DebugLogging) {
auto Pipeline = parsePipelineText(PipelineText);
if (!Pipeline || Pipeline->empty())
return false;
// If the first name isn't at the module layer, wrap the pipeline up
// automatically.
StringRef FirstName = Pipeline->front().Name;
if (!isModulePassName(FirstName)) {
if (isCGSCCPassName(FirstName))
Pipeline = {{"cgscc", std::move(*Pipeline)}};
else if (isFunctionPassName(FirstName))
Pipeline = {{"function", std::move(*Pipeline)}};
else if (isLoopPassName(FirstName))
Pipeline = {{"function", {{"loop", std::move(*Pipeline)}}}};
else
// Unknown pass name!
return false;
}
return parseModulePassPipeline(MPM, *Pipeline, VerifyEachPass, DebugLogging);
}
bool 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 true;
}
while (!PipelineText.empty()) {
StringRef Name;
std::tie(Name, PipelineText) = PipelineText.split(',');
if (!parseAAPassName(AA, Name))
return false;
}
return true;
}