llvm16 targets

1 files changed, 1890 insertions, 0 deletions

diff --git a/contrib/libs/llvm16/lib/Passes/PassBuilder.cpp b/contrib/libs/llvm16/lib/Passes/PassBuilder.cpp
new file mode 100644
index 00000000000..e251d56463a
--- /dev/null
+++ b/contrib/libs/llvm16/lib/Passes/PassBuilder.cpp
@@ -0,0 +1,1890 @@
+//===- Parsing and selection 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/CFGSCCPrinter.h"
+#include "llvm/Analysis/CGSCCPassManager.h"
+#include "llvm/Analysis/CallGraph.h"
+#include "llvm/Analysis/CallPrinter.h"
+#include "llvm/Analysis/CostModel.h"
+#include "llvm/Analysis/CycleAnalysis.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/DomPrinter.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/LegacyDivergenceAnalysis.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/Analysis/UniformityAnalysis.h"
+#include "llvm/CodeGen/TypePromotion.h"
+#include "llvm/IR/DebugInfo.h"
+#include "llvm/IR/Dominators.h"
+#include "llvm/IR/PassManager.h"
+#include "llvm/IR/PrintPasses.h"
+#include "llvm/IR/SafepointIRVerifier.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/IRPrinter/IRPrintingPasses.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/CoroConditionalWrapper.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/ModuleInliner.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/KCFI.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/SanitizerBinaryMetadata.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/DFAJumpThreading.h"
+#include "llvm/Transforms/Scalar/DeadStoreElimination.h"
+#include "llvm/Transforms/Scalar/DivRemPairs.h"
+#include "llvm/Transforms/Scalar/EarlyCSE.h"
+#include "llvm/Transforms/Scalar/FlattenCFG.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/LowerAtomicPass.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/SpeculativeExecution.h"
+#include "llvm/Transforms/Scalar/StraightLineStrengthReduce.h"
+#include "llvm/Transforms/Scalar/StructurizeCFG.h"
+#include "llvm/Transforms/Scalar/TLSVariableHoist.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/Debugify.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/LowerGlobalDtors.h"
+#include "llvm/Transforms/Utils/LowerIFunc.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/PredicateInfo.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"
+#include <optional>
+
+using namespace llvm;
+
+static const Regex DefaultAliasRegex(
+    "^(default|thinlto-pre-link|thinlto|lto-pre-link|lto)<(O[0123sz])>$");
+
+namespace llvm {
+cl::opt<bool> PrintPipelinePasses(
+    "print-pipeline-passes",
+    cl::desc("Print a '-passes' compatible string describing the pipeline "
+             "(best-effort only)."));
+} // namespace llvm
+
+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 nest pass which does nothing.
+struct NoOpLoopNestPass : PassInfoMixin<NoOpLoopNestPass> {
+  PreservedAnalyses run(LoopNest &L, LoopAnalysisManager &,
+                        LoopStandardAnalysisResults &, LPMUpdater &) {
+    return PreservedAnalyses::all();
+  }
+  static StringRef name() { return "NoOpLoopNestPass"; }
+};
+
+/// 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 PrintPipelinePasses || !printBeforePasses().empty() ||
+         !printAfterPasses().empty() || !isFilterPassesEmpty();
+}
+
+// A pass for testing -print-on-crash.
+// DO NOT USE THIS EXCEPT FOR TESTING!
+class TriggerCrashPass : public PassInfoMixin<TriggerCrashPass> {
+public:
+  PreservedAnalyses run(Module &, ModuleAnalysisManager &) {
+    abort();
+    return PreservedAnalyses::all();
+  }
+  static StringRef name() { return "TriggerCrashPass"; }
+};
+
+} // namespace
+
+PassBuilder::PassBuilder(TargetMachine *TM, PipelineTuningOptions PTO,
+                         std::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_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)      \
+  PIC->addClassToPassName(CLASS, 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_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)    \
+  PIC->addClassToPassName(CLASS, NAME);
+#define FUNCTION_ANALYSIS(NAME, CREATE_PASS)                                   \
+  PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
+#define LOOPNEST_PASS(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_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)        \
+  PIC->addClassToPassName(CLASS, 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_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)       \
+  PIC->addClassToPassName(CLASS, NAME);
+#define CGSCC_ANALYSIS(NAME, CREATE_PASS)                                      \
+  PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
+#include "PassRegistry.def"
+  }
+}
+
+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) {
+  // We almost always want the default alias analysis pipeline.
+  // If a user wants a different one, they can register their own before calling
+  // registerFunctionAnalyses().
+  FAM.registerPass([&] { return buildDefaultAAPipeline(); });
+
+#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);
+}
+
+static std::optional<int> parseRepeatPassName(StringRef Name) {
+  if (!Name.consume_front("repeat<") || !Name.consume_back(">"))
+    return std::nullopt;
+  int Count;
+  if (Name.getAsInteger(0, Count) || Count <= 0)
+    return std::nullopt;
+  return Count;
+}
+
+static std::optional<int> parseDevirtPassName(StringRef Name) {
+  if (!Name.consume_front("devirt<") || !Name.consume_back(">"))
+    return std::nullopt;
+  int Count;
+  if (Name.getAsInteger(0, Count) || Count < 0)
+    return std::nullopt;
+  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() &&
+      (!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<bool> parseSinglePassOption(StringRef Params, StringRef OptionName,
+                                     StringRef PassName) {
+  bool Result = false;
+  while (!Params.empty()) {
+    StringRef ParamName;
+    std::tie(ParamName, Params) = Params.split(';');
+
+    if (ParamName == OptionName) {
+      Result = true;
+    } else {
+      return make_error<StringError>(
+          formatv("invalid {1} pass parameter '{0}' ", ParamName, PassName)
+              .str(),
+          inconvertibleErrorCode());
+    }
+  }
+  return Result;
+}
+
+Expected<bool> parseInlinerPassOptions(StringRef Params) {
+  return parseSinglePassOption(Params, "only-mandatory", "InlinerPass");
+}
+
+Expected<bool> parseCoroSplitPassOptions(StringRef Params) {
+  return parseSinglePassOption(Params, "reuse-storage", "CoroSplitPass");
+}
+
+Expected<bool> parseEarlyCSEPassOptions(StringRef Params) {
+  return parseSinglePassOption(Params, "memssa", "EarlyCSE");
+}
+
+Expected<bool> parseEntryExitInstrumenterPassOptions(StringRef Params) {
+  return parseSinglePassOption(Params, "post-inline", "EntryExitInstrumenter");
+}
+
+Expected<bool> parseLoopExtractorPassOptions(StringRef Params) {
+  return parseSinglePassOption(Params, "single", "LoopExtractor");
+}
+
+Expected<bool> parseLowerMatrixIntrinsicsPassOptions(StringRef Params) {
+  return parseSinglePassOption(Params, "minimal", "LowerMatrixIntrinsics");
+}
+
+Expected<AddressSanitizerOptions> parseASanPassOptions(StringRef Params) {
+  AddressSanitizerOptions Result;
+  while (!Params.empty()) {
+    StringRef ParamName;
+    std::tie(ParamName, Params) = Params.split(';');
+
+    if (ParamName == "kernel") {
+      Result.CompileKernel = true;
+    } else {
+      return make_error<StringError>(
+          formatv("invalid AddressSanitizer pass parameter '{0}' ", ParamName)
+              .str(),
+          inconvertibleErrorCode());
+    }
+  }
+  return Result;
+}
+
+Expected<HWAddressSanitizerOptions> parseHWASanPassOptions(StringRef Params) {
+  HWAddressSanitizerOptions Result;
+  while (!Params.empty()) {
+    StringRef ParamName;
+    std::tie(ParamName, Params) = Params.split(';');
+
+    if (ParamName == "recover") {
+      Result.Recover = true;
+    } else if (ParamName == "kernel") {
+      Result.CompileKernel = true;
+    } else {
+      return make_error<StringError>(
+          formatv("invalid HWAddressSanitizer pass parameter '{0}' ", ParamName)
+              .str(),
+          inconvertibleErrorCode());
+    }
+  }
+  return Result;
+}
+
+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 if (ParamName == "eager-checks") {
+      Result.EagerChecks = true;
+    } 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-range-to-icmp") {
+      Result.convertSwitchRangeToICmp(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<std::pair<bool, bool>> parseLoopUnswitchOptions(StringRef Params) {
+  std::pair<bool, bool> Result = {false, true};
+  while (!Params.empty()) {
+    StringRef ParamName;
+    std::tie(ParamName, Params) = Params.split(';');
+
+    bool Enable = !ParamName.consume_front("no-");
+    if (ParamName == "nontrivial") {
+      Result.first = Enable;
+    } else if (ParamName == "trivial") {
+      Result.second = Enable;
+    } else {
+      return make_error<StringError>(
+          formatv("invalid LoopUnswitch pass parameter '{0}' ", ParamName)
+              .str(),
+          inconvertibleErrorCode());
+    }
+  }
+  return Result;
+}
+
+Expected<LICMOptions> parseLICMOptions(StringRef Params) {
+  LICMOptions Result;
+  while (!Params.empty()) {
+    StringRef ParamName;
+    std::tie(ParamName, Params) = Params.split(';');
+
+    bool Enable = !ParamName.consume_front("no-");
+    if (ParamName == "allowspeculation") {
+      Result.AllowSpeculation = Enable;
+    } else {
+      return make_error<StringError>(
+          formatv("invalid LICM 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<IPSCCPOptions> parseIPSCCPOptions(StringRef Params) {
+  IPSCCPOptions Result;
+  while (!Params.empty()) {
+    StringRef ParamName;
+    std::tie(ParamName, Params) = Params.split(';');
+
+    bool Enable = !ParamName.consume_front("no-");
+    if (ParamName == "func-spec")
+      Result.setFuncSpec(Enable);
+    else
+      return make_error<StringError>(
+          formatv("invalid IPSCCP pass parameter '{0}' ", ParamName).str(),
+          inconvertibleErrorCode());
+  }
+  return Result;
+}
+
+Expected<SROAOptions> parseSROAOptions(StringRef Params) {
+  if (Params.empty() || Params == "modify-cfg")
+    return SROAOptions::ModifyCFG;
+  if (Params == "preserve-cfg")
+    return SROAOptions::PreserveCFG;
+  return make_error<StringError>(
+      formatv("invalid SROA pass parameter '{0}' (either preserve-cfg or "
+              "modify-cfg can be specified)",
+              Params)
+          .str(),
+      inconvertibleErrorCode());
+}
+
+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;
+}
+
+Expected<bool> parseDependenceAnalysisPrinterOptions(StringRef Params) {
+  return parseSinglePassOption(Params, "normalized-results",
+                               "DependenceAnalysisPrinter");
+}
+
+} // 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" || Name == "function<eager-inv>")
+    return true;
+  if (Name == "coro-cond")
+    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_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)      \
+  if (checkParametrizedPassName(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" || Name == "function<eager-inv>")
+    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_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)       \
+  if (checkParametrizedPassName(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" || Name == "function<eager-inv>")
+    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, CLASS, CREATE_PASS, PARSER, PARAMS)    \
+  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 isLoopNestPassName(StringRef Name, CallbacksT &Callbacks,
+                               bool &UseMemorySSA) {
+  UseMemorySSA = false;
+
+  // Explicitly handle custom-parsed pass names.
+  if (parseRepeatPassName(Name))
+    return true;
+
+  if (checkParametrizedPassName(Name, "lnicm")) {
+    UseMemorySSA = true;
+    return true;
+  }
+
+#define LOOPNEST_PASS(NAME, CREATE_PASS)                                       \
+  if (Name == NAME)                                                            \
+    return true;
+#include "PassRegistry.def"
+
+  return callbacksAcceptPassName<LoopPassManager>(Name, Callbacks);
+}
+
+template <typename CallbacksT>
+static bool isLoopPassName(StringRef Name, CallbacksT &Callbacks,
+                           bool &UseMemorySSA) {
+  UseMemorySSA = false;
+
+  // Explicitly handle custom-parsed pass names.
+  if (parseRepeatPassName(Name))
+    return true;
+
+  if (checkParametrizedPassName(Name, "licm")) {
+    UseMemorySSA = true;
+    return true;
+  }
+
+#define LOOP_PASS(NAME, CREATE_PASS)                                           \
+  if (Name == NAME)                                                            \
+    return true;
+#define LOOP_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)        \
+  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);
+}
+
+std::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 std::nullopt;
+
+      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 std::nullopt;
+  }
+
+  if (PipelineStack.size() > 1)
+    // Unbalanced paretheses.
+    return std::nullopt;
+
+  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 == "coro-cond") {
+      ModulePassManager NestedMPM;
+      if (auto Err = parseModulePassPipeline(NestedMPM, InnerPipeline))
+        return Err;
+      MPM.addPass(CoroConditionalWrapper(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" || Name == "function<eager-inv>") {
+      FunctionPassManager FPM;
+      if (auto Err = parseFunctionPassPipeline(FPM, InnerPipeline))
+        return Err;
+      MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM),
+                                                    Name != "function"));
+      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_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)      \
+  if (checkParametrizedPassName(Name, NAME)) {                                 \
+    auto Params = parsePassParameters(PARSER, Name, NAME);                     \
+    if (!Params)                                                               \
+      return Params.takeError();                                               \
+    MPM.addPass(CREATE_PASS(Params.get()));                                    \
+    return Error::success();                                                   \
+  }
+#define MODULE_ANALYSIS(NAME, CREATE_PASS)                                     \
+  if (Name == "require<" NAME ">") {                                           \
+    MPM.addPass(                                                               \
+        RequireAnalysisPass<                                                   \
+            std::remove_reference_t<decltype(CREATE_PASS)>, Module>());        \
+    return Error::success();                                                   \
+  }                                                                            \
+  if (Name == "invalidate<" NAME ">") {                                        \
+    MPM.addPass(InvalidateAnalysisPass<                                        \
+                std::remove_reference_t<decltype(CREATE_PASS)>>());            \
+    return Error::success();                                                   \
+  }
+#define CGSCC_PASS(NAME, CREATE_PASS)                                          \
+  if (Name == NAME) {                                                          \
+    MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(CREATE_PASS));         \
+    return Error::success();                                                   \
+  }
+#define CGSCC_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)       \
+  if (checkParametrizedPassName(Name, NAME)) {                                 \
+    auto Params = parsePassParameters(PARSER, Name, NAME);                     \
+    if (!Params)                                                               \
+      return Params.takeError();                                               \
+    MPM.addPass(                                                               \
+        createModuleToPostOrderCGSCCPassAdaptor(CREATE_PASS(Params.get())));   \
+    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, CLASS, CREATE_PASS, PARSER, PARAMS)    \
+  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 LOOPNEST_PASS(NAME, CREATE_PASS)                                       \
+  if (Name == NAME) {                                                          \
+    MPM.addPass(createModuleToFunctionPassAdaptor(                             \
+        createFunctionToLoopPassAdaptor(CREATE_PASS, false, false)));          \
+    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, CLASS, CREATE_PASS, PARSER, PARAMS)        \
+  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" || Name == "function<eager-inv>") {
+      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), Name != "function"));
+      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_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)       \
+  if (checkParametrizedPassName(Name, NAME)) {                                 \
+    auto Params = parsePassParameters(PARSER, Name, NAME);                     \
+    if (!Params)                                                               \
+      return Params.takeError();                                               \
+    CGPM.addPass(CREATE_PASS(Params.get()));                                   \
+    return Error::success();                                                   \
+  }
+#define CGSCC_ANALYSIS(NAME, CREATE_PASS)                                      \
+  if (Name == "require<" NAME ">") {                                           \
+    CGPM.addPass(RequireAnalysisPass<                                          \
+                 std::remove_reference_t<decltype(CREATE_PASS)>,               \
+                 LazyCallGraph::SCC, CGSCCAnalysisManager, LazyCallGraph &,    \
+                 CGSCCUpdateResult &>());                                      \
+    return Error::success();                                                   \
+  }                                                                            \
+  if (Name == "invalidate<" NAME ">") {                                        \
+    CGPM.addPass(InvalidateAnalysisPass<                                       \
+                 std::remove_reference_t<decltype(CREATE_PASS)>>());           \
+    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, CLASS, CREATE_PASS, PARSER, PARAMS)    \
+  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 LOOPNEST_PASS(NAME, CREATE_PASS)                                       \
+  if (Name == NAME) {                                                          \
+    CGPM.addPass(createCGSCCToFunctionPassAdaptor(                             \
+        createFunctionToLoopPassAdaptor(CREATE_PASS, false, false)));          \
+    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, CLASS, CREATE_PASS, PARSER, PARAMS)        \
+  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.contains("simple-loop-unswitch");
+      });
+      bool UseBPI = llvm::any_of(InnerPipeline, [](auto Pipeline) {
+        return Pipeline.Name == "loop-predication";
+      });
+      FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM), UseMemorySSA,
+                                                  UseBFI, UseBPI));
+      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, CLASS, CREATE_PASS, PARSER, PARAMS)    \
+  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_t<decltype(CREATE_PASS)>, Function>());      \
+    return Error::success();                                                   \
+  }                                                                            \
+  if (Name == "invalidate<" NAME ">") {                                        \
+    FPM.addPass(InvalidateAnalysisPass<                                        \
+                std::remove_reference_t<decltype(CREATE_PASS)>>());            \
+    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 LOOPNEST_PASS(NAME, CREATE_PASS)                                       \
+  if (Name == NAME) {                                                          \
+    FPM.addPass(createFunctionToLoopPassAdaptor(CREATE_PASS, false, false));   \
+    return Error::success();                                                   \
+  }
+#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, CLASS, CREATE_PASS, PARSER, PARAMS)        \
+  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 LOOPNEST_PASS(NAME, CREATE_PASS)                                       \
+  if (Name == NAME) {                                                          \
+    LPM.addPass(CREATE_PASS);                                                  \
+    return Error::success();                                                   \
+  }
+#define LOOP_PASS(NAME, CREATE_PASS)                                           \
+  if (Name == NAME) {                                                          \
+    LPM.addPass(CREATE_PASS);                                                  \
+    return Error::success();                                                   \
+  }
+#define LOOP_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)        \
+  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_t<decltype(CREATE_PASS)>, Loop,          \
+                LoopAnalysisManager, LoopStandardAnalysisResults &,            \
+                LPMUpdater &>());                                              \
+    return Error::success();                                                   \
+  }                                                                            \
+  if (Name == "invalidate<" NAME ">") {                                        \
+    LPM.addPass(InvalidateAnalysisPass<                                        \
+                std::remove_reference_t<decltype(CREATE_PASS)>>());            \
+    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_t<decltype(CREATE_PASS)>>();                     \
+    return true;                                                               \
+  }
+#define FUNCTION_ALIAS_ANALYSIS(NAME, CREATE_PASS)                             \
+  if (Name == NAME) {                                                          \
+    AA.registerFunctionAnalysis<                                               \
+        std::remove_reference_t<decltype(CREATE_PASS)>>();                     \
+    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)) {
+    bool UseMemorySSA;
+    if (isCGSCCPassName(FirstName, CGSCCPipelineParsingCallbacks)) {
+      Pipeline = {{"cgscc", std::move(*Pipeline)}};
+    } else if (isFunctionPassName(FirstName,
+                                  FunctionPipelineParsingCallbacks)) {
+      Pipeline = {{"function", std::move(*Pipeline)}};
+    } else if (isLoopNestPassName(FirstName, LoopPipelineParsingCallbacks,
+                                  UseMemorySSA)) {
+      Pipeline = {{"function", {{UseMemorySSA ? "loop-mssa" : "loop",
+                                 std::move(*Pipeline)}}}};
+    } else if (isLoopPassName(FirstName, LoopPipelineParsingCallbacks,
+                              UseMemorySSA)) {
+      Pipeline = {{"function", {{UseMemorySSA ? "loop-mssa" : "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();
+}
+
+static void printPassName(StringRef PassName, raw_ostream &OS) {
+  OS << "  " << PassName << "\n";
+}
+static void printPassName(StringRef PassName, StringRef Params,
+                          raw_ostream &OS) {
+  OS << "  " << PassName << "<" << Params << ">\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 passes with params:\n";
+#define MODULE_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)      \
+  printPassName(NAME, PARAMS, 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 passes with params:\n";
+#define CGSCC_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)       \
+  printPassName(NAME, PARAMS, 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 passes with params:\n";
+#define FUNCTION_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)    \
+  printPassName(NAME, PARAMS, 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 << "LoopNest passes:\n";
+#define LOOPNEST_PASS(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 passes with params:\n";
+#define LOOP_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)        \
+  printPassName(NAME, PARAMS, 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);
+}