1 //===- Parsing and selection of pass pipelines ----------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 /// \file
9 ///
10 /// This file provides the implementation of the PassBuilder based on our
11 /// static pass registry as well as related functionality. It also provides
12 /// helpers to aid in analyzing, debugging, and testing passes and pass
13 /// pipelines.
14 ///
15 //===----------------------------------------------------------------------===//
16 
17 #include "llvm/Passes/PassBuilder.h"
18 #include "llvm/ADT/StringSwitch.h"
19 #include "llvm/Analysis/AliasAnalysisEvaluator.h"
20 #include "llvm/Analysis/AliasSetTracker.h"
21 #include "llvm/Analysis/AssumptionCache.h"
22 #include "llvm/Analysis/BasicAliasAnalysis.h"
23 #include "llvm/Analysis/BlockFrequencyInfo.h"
24 #include "llvm/Analysis/BranchProbabilityInfo.h"
25 #include "llvm/Analysis/CFGPrinter.h"
26 #include "llvm/Analysis/CFGSCCPrinter.h"
27 #include "llvm/Analysis/CGSCCPassManager.h"
28 #include "llvm/Analysis/CallGraph.h"
29 #include "llvm/Analysis/CallPrinter.h"
30 #include "llvm/Analysis/CostModel.h"
31 #include "llvm/Analysis/CycleAnalysis.h"
32 #include "llvm/Analysis/DDG.h"
33 #include "llvm/Analysis/DDGPrinter.h"
34 #include "llvm/Analysis/Delinearization.h"
35 #include "llvm/Analysis/DemandedBits.h"
36 #include "llvm/Analysis/DependenceAnalysis.h"
37 #include "llvm/Analysis/DivergenceAnalysis.h"
38 #include "llvm/Analysis/DomPrinter.h"
39 #include "llvm/Analysis/DominanceFrontier.h"
40 #include "llvm/Analysis/FunctionPropertiesAnalysis.h"
41 #include "llvm/Analysis/GlobalsModRef.h"
42 #include "llvm/Analysis/IRSimilarityIdentifier.h"
43 #include "llvm/Analysis/IVUsers.h"
44 #include "llvm/Analysis/InlineAdvisor.h"
45 #include "llvm/Analysis/InlineSizeEstimatorAnalysis.h"
46 #include "llvm/Analysis/InstCount.h"
47 #include "llvm/Analysis/LazyCallGraph.h"
48 #include "llvm/Analysis/LazyValueInfo.h"
49 #include "llvm/Analysis/LegacyDivergenceAnalysis.h"
50 #include "llvm/Analysis/Lint.h"
51 #include "llvm/Analysis/LoopAccessAnalysis.h"
52 #include "llvm/Analysis/LoopCacheAnalysis.h"
53 #include "llvm/Analysis/LoopInfo.h"
54 #include "llvm/Analysis/LoopNestAnalysis.h"
55 #include "llvm/Analysis/MemDerefPrinter.h"
56 #include "llvm/Analysis/MemoryDependenceAnalysis.h"
57 #include "llvm/Analysis/MemorySSA.h"
58 #include "llvm/Analysis/ModuleDebugInfoPrinter.h"
59 #include "llvm/Analysis/ModuleSummaryAnalysis.h"
60 #include "llvm/Analysis/MustExecute.h"
61 #include "llvm/Analysis/ObjCARCAliasAnalysis.h"
62 #include "llvm/Analysis/OptimizationRemarkEmitter.h"
63 #include "llvm/Analysis/PhiValues.h"
64 #include "llvm/Analysis/PostDominators.h"
65 #include "llvm/Analysis/ProfileSummaryInfo.h"
66 #include "llvm/Analysis/RegionInfo.h"
67 #include "llvm/Analysis/ScalarEvolution.h"
68 #include "llvm/Analysis/ScalarEvolutionAliasAnalysis.h"
69 #include "llvm/Analysis/ScopedNoAliasAA.h"
70 #include "llvm/Analysis/StackLifetime.h"
71 #include "llvm/Analysis/StackSafetyAnalysis.h"
72 #include "llvm/Analysis/TargetLibraryInfo.h"
73 #include "llvm/Analysis/TargetTransformInfo.h"
74 #include "llvm/Analysis/TypeBasedAliasAnalysis.h"
75 #include "llvm/Analysis/UniformityAnalysis.h"
76 #include "llvm/CodeGen/TypePromotion.h"
77 #include "llvm/IR/DebugInfo.h"
78 #include "llvm/IR/Dominators.h"
79 #include "llvm/IR/PassManager.h"
80 #include "llvm/IR/PrintPasses.h"
81 #include "llvm/IR/SafepointIRVerifier.h"
82 #include "llvm/IR/Verifier.h"
83 #include "llvm/IRPrinter/IRPrintingPasses.h"
84 #include "llvm/Support/CommandLine.h"
85 #include "llvm/Support/Debug.h"
86 #include "llvm/Support/ErrorHandling.h"
87 #include "llvm/Support/FormatVariadic.h"
88 #include "llvm/Support/Regex.h"
89 #include "llvm/Target/TargetMachine.h"
90 #include "llvm/Transforms/AggressiveInstCombine/AggressiveInstCombine.h"
91 #include "llvm/Transforms/Coroutines/CoroCleanup.h"
92 #include "llvm/Transforms/Coroutines/CoroConditionalWrapper.h"
93 #include "llvm/Transforms/Coroutines/CoroEarly.h"
94 #include "llvm/Transforms/Coroutines/CoroElide.h"
95 #include "llvm/Transforms/Coroutines/CoroSplit.h"
96 #include "llvm/Transforms/IPO/AlwaysInliner.h"
97 #include "llvm/Transforms/IPO/Annotation2Metadata.h"
98 #include "llvm/Transforms/IPO/ArgumentPromotion.h"
99 #include "llvm/Transforms/IPO/Attributor.h"
100 #include "llvm/Transforms/IPO/BlockExtractor.h"
101 #include "llvm/Transforms/IPO/CalledValuePropagation.h"
102 #include "llvm/Transforms/IPO/ConstantMerge.h"
103 #include "llvm/Transforms/IPO/CrossDSOCFI.h"
104 #include "llvm/Transforms/IPO/DeadArgumentElimination.h"
105 #include "llvm/Transforms/IPO/ElimAvailExtern.h"
106 #include "llvm/Transforms/IPO/ForceFunctionAttrs.h"
107 #include "llvm/Transforms/IPO/FunctionAttrs.h"
108 #include "llvm/Transforms/IPO/FunctionImport.h"
109 #include "llvm/Transforms/IPO/GlobalDCE.h"
110 #include "llvm/Transforms/IPO/GlobalOpt.h"
111 #include "llvm/Transforms/IPO/GlobalSplit.h"
112 #include "llvm/Transforms/IPO/HotColdSplitting.h"
113 #include "llvm/Transforms/IPO/IROutliner.h"
114 #include "llvm/Transforms/IPO/InferFunctionAttrs.h"
115 #include "llvm/Transforms/IPO/Inliner.h"
116 #include "llvm/Transforms/IPO/Internalize.h"
117 #include "llvm/Transforms/IPO/LoopExtractor.h"
118 #include "llvm/Transforms/IPO/LowerTypeTests.h"
119 #include "llvm/Transforms/IPO/MergeFunctions.h"
120 #include "llvm/Transforms/IPO/ModuleInliner.h"
121 #include "llvm/Transforms/IPO/OpenMPOpt.h"
122 #include "llvm/Transforms/IPO/PartialInlining.h"
123 #include "llvm/Transforms/IPO/SCCP.h"
124 #include "llvm/Transforms/IPO/SampleProfile.h"
125 #include "llvm/Transforms/IPO/SampleProfileProbe.h"
126 #include "llvm/Transforms/IPO/StripDeadPrototypes.h"
127 #include "llvm/Transforms/IPO/StripSymbols.h"
128 #include "llvm/Transforms/IPO/SyntheticCountsPropagation.h"
129 #include "llvm/Transforms/IPO/WholeProgramDevirt.h"
130 #include "llvm/Transforms/InstCombine/InstCombine.h"
131 #include "llvm/Transforms/Instrumentation.h"
132 #include "llvm/Transforms/Instrumentation/AddressSanitizer.h"
133 #include "llvm/Transforms/Instrumentation/BoundsChecking.h"
134 #include "llvm/Transforms/Instrumentation/CGProfile.h"
135 #include "llvm/Transforms/Instrumentation/ControlHeightReduction.h"
136 #include "llvm/Transforms/Instrumentation/DataFlowSanitizer.h"
137 #include "llvm/Transforms/Instrumentation/GCOVProfiler.h"
138 #include "llvm/Transforms/Instrumentation/HWAddressSanitizer.h"
139 #include "llvm/Transforms/Instrumentation/InstrOrderFile.h"
140 #include "llvm/Transforms/Instrumentation/InstrProfiling.h"
141 #include "llvm/Transforms/Instrumentation/KCFI.h"
142 #include "llvm/Transforms/Instrumentation/MemProfiler.h"
143 #include "llvm/Transforms/Instrumentation/MemorySanitizer.h"
144 #include "llvm/Transforms/Instrumentation/PGOInstrumentation.h"
145 #include "llvm/Transforms/Instrumentation/PoisonChecking.h"
146 #include "llvm/Transforms/Instrumentation/SanitizerBinaryMetadata.h"
147 #include "llvm/Transforms/Instrumentation/SanitizerCoverage.h"
148 #include "llvm/Transforms/Instrumentation/ThreadSanitizer.h"
149 #include "llvm/Transforms/ObjCARC.h"
150 #include "llvm/Transforms/Scalar/ADCE.h"
151 #include "llvm/Transforms/Scalar/AlignmentFromAssumptions.h"
152 #include "llvm/Transforms/Scalar/AnnotationRemarks.h"
153 #include "llvm/Transforms/Scalar/BDCE.h"
154 #include "llvm/Transforms/Scalar/CallSiteSplitting.h"
155 #include "llvm/Transforms/Scalar/ConstantHoisting.h"
156 #include "llvm/Transforms/Scalar/ConstraintElimination.h"
157 #include "llvm/Transforms/Scalar/CorrelatedValuePropagation.h"
158 #include "llvm/Transforms/Scalar/DCE.h"
159 #include "llvm/Transforms/Scalar/DFAJumpThreading.h"
160 #include "llvm/Transforms/Scalar/DeadStoreElimination.h"
161 #include "llvm/Transforms/Scalar/DivRemPairs.h"
162 #include "llvm/Transforms/Scalar/EarlyCSE.h"
163 #include "llvm/Transforms/Scalar/FlattenCFG.h"
164 #include "llvm/Transforms/Scalar/Float2Int.h"
165 #include "llvm/Transforms/Scalar/GVN.h"
166 #include "llvm/Transforms/Scalar/GuardWidening.h"
167 #include "llvm/Transforms/Scalar/IVUsersPrinter.h"
168 #include "llvm/Transforms/Scalar/IndVarSimplify.h"
169 #include "llvm/Transforms/Scalar/InductiveRangeCheckElimination.h"
170 #include "llvm/Transforms/Scalar/InferAddressSpaces.h"
171 #include "llvm/Transforms/Scalar/InstSimplifyPass.h"
172 #include "llvm/Transforms/Scalar/JumpThreading.h"
173 #include "llvm/Transforms/Scalar/LICM.h"
174 #include "llvm/Transforms/Scalar/LoopAccessAnalysisPrinter.h"
175 #include "llvm/Transforms/Scalar/LoopBoundSplit.h"
176 #include "llvm/Transforms/Scalar/LoopDataPrefetch.h"
177 #include "llvm/Transforms/Scalar/LoopDeletion.h"
178 #include "llvm/Transforms/Scalar/LoopDistribute.h"
179 #include "llvm/Transforms/Scalar/LoopFlatten.h"
180 #include "llvm/Transforms/Scalar/LoopFuse.h"
181 #include "llvm/Transforms/Scalar/LoopIdiomRecognize.h"
182 #include "llvm/Transforms/Scalar/LoopInstSimplify.h"
183 #include "llvm/Transforms/Scalar/LoopInterchange.h"
184 #include "llvm/Transforms/Scalar/LoopLoadElimination.h"
185 #include "llvm/Transforms/Scalar/LoopPassManager.h"
186 #include "llvm/Transforms/Scalar/LoopPredication.h"
187 #include "llvm/Transforms/Scalar/LoopReroll.h"
188 #include "llvm/Transforms/Scalar/LoopRotation.h"
189 #include "llvm/Transforms/Scalar/LoopSimplifyCFG.h"
190 #include "llvm/Transforms/Scalar/LoopSink.h"
191 #include "llvm/Transforms/Scalar/LoopStrengthReduce.h"
192 #include "llvm/Transforms/Scalar/LoopUnrollAndJamPass.h"
193 #include "llvm/Transforms/Scalar/LoopUnrollPass.h"
194 #include "llvm/Transforms/Scalar/LoopVersioningLICM.h"
195 #include "llvm/Transforms/Scalar/LowerAtomicPass.h"
196 #include "llvm/Transforms/Scalar/LowerConstantIntrinsics.h"
197 #include "llvm/Transforms/Scalar/LowerExpectIntrinsic.h"
198 #include "llvm/Transforms/Scalar/LowerGuardIntrinsic.h"
199 #include "llvm/Transforms/Scalar/LowerMatrixIntrinsics.h"
200 #include "llvm/Transforms/Scalar/LowerWidenableCondition.h"
201 #include "llvm/Transforms/Scalar/MakeGuardsExplicit.h"
202 #include "llvm/Transforms/Scalar/MemCpyOptimizer.h"
203 #include "llvm/Transforms/Scalar/MergeICmps.h"
204 #include "llvm/Transforms/Scalar/MergedLoadStoreMotion.h"
205 #include "llvm/Transforms/Scalar/NaryReassociate.h"
206 #include "llvm/Transforms/Scalar/NewGVN.h"
207 #include "llvm/Transforms/Scalar/PartiallyInlineLibCalls.h"
208 #include "llvm/Transforms/Scalar/Reassociate.h"
209 #include "llvm/Transforms/Scalar/Reg2Mem.h"
210 #include "llvm/Transforms/Scalar/RewriteStatepointsForGC.h"
211 #include "llvm/Transforms/Scalar/SCCP.h"
212 #include "llvm/Transforms/Scalar/SROA.h"
213 #include "llvm/Transforms/Scalar/ScalarizeMaskedMemIntrin.h"
214 #include "llvm/Transforms/Scalar/Scalarizer.h"
215 #include "llvm/Transforms/Scalar/SeparateConstOffsetFromGEP.h"
216 #include "llvm/Transforms/Scalar/SimpleLoopUnswitch.h"
217 #include "llvm/Transforms/Scalar/SimplifyCFG.h"
218 #include "llvm/Transforms/Scalar/Sink.h"
219 #include "llvm/Transforms/Scalar/SpeculativeExecution.h"
220 #include "llvm/Transforms/Scalar/StraightLineStrengthReduce.h"
221 #include "llvm/Transforms/Scalar/StructurizeCFG.h"
222 #include "llvm/Transforms/Scalar/TLSVariableHoist.h"
223 #include "llvm/Transforms/Scalar/TailRecursionElimination.h"
224 #include "llvm/Transforms/Scalar/WarnMissedTransforms.h"
225 #include "llvm/Transforms/Utils/AddDiscriminators.h"
226 #include "llvm/Transforms/Utils/AssumeBundleBuilder.h"
227 #include "llvm/Transforms/Utils/BreakCriticalEdges.h"
228 #include "llvm/Transforms/Utils/CanonicalizeAliases.h"
229 #include "llvm/Transforms/Utils/CanonicalizeFreezeInLoops.h"
230 #include "llvm/Transforms/Utils/Debugify.h"
231 #include "llvm/Transforms/Utils/EntryExitInstrumenter.h"
232 #include "llvm/Transforms/Utils/FixIrreducible.h"
233 #include "llvm/Transforms/Utils/HelloWorld.h"
234 #include "llvm/Transforms/Utils/InjectTLIMappings.h"
235 #include "llvm/Transforms/Utils/InstructionNamer.h"
236 #include "llvm/Transforms/Utils/LCSSA.h"
237 #include "llvm/Transforms/Utils/LibCallsShrinkWrap.h"
238 #include "llvm/Transforms/Utils/LoopSimplify.h"
239 #include "llvm/Transforms/Utils/LoopVersioning.h"
240 #include "llvm/Transforms/Utils/LowerGlobalDtors.h"
241 #include "llvm/Transforms/Utils/LowerIFunc.h"
242 #include "llvm/Transforms/Utils/LowerInvoke.h"
243 #include "llvm/Transforms/Utils/LowerSwitch.h"
244 #include "llvm/Transforms/Utils/Mem2Reg.h"
245 #include "llvm/Transforms/Utils/MetaRenamer.h"
246 #include "llvm/Transforms/Utils/NameAnonGlobals.h"
247 #include "llvm/Transforms/Utils/PredicateInfo.h"
248 #include "llvm/Transforms/Utils/RelLookupTableConverter.h"
249 #include "llvm/Transforms/Utils/StripGCRelocates.h"
250 #include "llvm/Transforms/Utils/StripNonLineTableDebugInfo.h"
251 #include "llvm/Transforms/Utils/SymbolRewriter.h"
252 #include "llvm/Transforms/Utils/UnifyFunctionExitNodes.h"
253 #include "llvm/Transforms/Utils/UnifyLoopExits.h"
254 #include "llvm/Transforms/Vectorize/LoadStoreVectorizer.h"
255 #include "llvm/Transforms/Vectorize/LoopVectorize.h"
256 #include "llvm/Transforms/Vectorize/SLPVectorizer.h"
257 #include "llvm/Transforms/Vectorize/VectorCombine.h"
258 #include <optional>
259 
260 using namespace llvm;
261 
262 static const Regex DefaultAliasRegex(
263     "^(default|thinlto-pre-link|thinlto|lto-pre-link|lto)<(O[0123sz])>$");
264 
265 namespace llvm {
266 cl::opt<bool> PrintPipelinePasses(
267     "print-pipeline-passes",
268     cl::desc("Print a '-passes' compatible string describing the pipeline "
269              "(best-effort only)."));
270 } // namespace llvm
271 
272 namespace {
273 
274 // The following passes/analyses have custom names, otherwise their name will
275 // include `(anonymous namespace)`. These are special since they are only for
276 // testing purposes and don't live in a header file.
277 
278 /// No-op module pass which does nothing.
279 struct NoOpModulePass : PassInfoMixin<NoOpModulePass> {
280   PreservedAnalyses run(Module &M, ModuleAnalysisManager &) {
281     return PreservedAnalyses::all();
282   }
283 
284   static StringRef name() { return "NoOpModulePass"; }
285 };
286 
287 /// No-op module analysis.
288 class NoOpModuleAnalysis : public AnalysisInfoMixin<NoOpModuleAnalysis> {
289   friend AnalysisInfoMixin<NoOpModuleAnalysis>;
290   static AnalysisKey Key;
291 
292 public:
293   struct Result {};
294   Result run(Module &, ModuleAnalysisManager &) { return Result(); }
295   static StringRef name() { return "NoOpModuleAnalysis"; }
296 };
297 
298 /// No-op CGSCC pass which does nothing.
299 struct NoOpCGSCCPass : PassInfoMixin<NoOpCGSCCPass> {
300   PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &,
301                         LazyCallGraph &, CGSCCUpdateResult &UR) {
302     return PreservedAnalyses::all();
303   }
304   static StringRef name() { return "NoOpCGSCCPass"; }
305 };
306 
307 /// No-op CGSCC analysis.
308 class NoOpCGSCCAnalysis : public AnalysisInfoMixin<NoOpCGSCCAnalysis> {
309   friend AnalysisInfoMixin<NoOpCGSCCAnalysis>;
310   static AnalysisKey Key;
311 
312 public:
313   struct Result {};
314   Result run(LazyCallGraph::SCC &, CGSCCAnalysisManager &, LazyCallGraph &G) {
315     return Result();
316   }
317   static StringRef name() { return "NoOpCGSCCAnalysis"; }
318 };
319 
320 /// No-op function pass which does nothing.
321 struct NoOpFunctionPass : PassInfoMixin<NoOpFunctionPass> {
322   PreservedAnalyses run(Function &F, FunctionAnalysisManager &) {
323     return PreservedAnalyses::all();
324   }
325   static StringRef name() { return "NoOpFunctionPass"; }
326 };
327 
328 /// No-op function analysis.
329 class NoOpFunctionAnalysis : public AnalysisInfoMixin<NoOpFunctionAnalysis> {
330   friend AnalysisInfoMixin<NoOpFunctionAnalysis>;
331   static AnalysisKey Key;
332 
333 public:
334   struct Result {};
335   Result run(Function &, FunctionAnalysisManager &) { return Result(); }
336   static StringRef name() { return "NoOpFunctionAnalysis"; }
337 };
338 
339 /// No-op loop nest pass which does nothing.
340 struct NoOpLoopNestPass : PassInfoMixin<NoOpLoopNestPass> {
341   PreservedAnalyses run(LoopNest &L, LoopAnalysisManager &,
342                         LoopStandardAnalysisResults &, LPMUpdater &) {
343     return PreservedAnalyses::all();
344   }
345   static StringRef name() { return "NoOpLoopNestPass"; }
346 };
347 
348 /// No-op loop pass which does nothing.
349 struct NoOpLoopPass : PassInfoMixin<NoOpLoopPass> {
350   PreservedAnalyses run(Loop &L, LoopAnalysisManager &,
351                         LoopStandardAnalysisResults &, LPMUpdater &) {
352     return PreservedAnalyses::all();
353   }
354   static StringRef name() { return "NoOpLoopPass"; }
355 };
356 
357 /// No-op loop analysis.
358 class NoOpLoopAnalysis : public AnalysisInfoMixin<NoOpLoopAnalysis> {
359   friend AnalysisInfoMixin<NoOpLoopAnalysis>;
360   static AnalysisKey Key;
361 
362 public:
363   struct Result {};
364   Result run(Loop &, LoopAnalysisManager &, LoopStandardAnalysisResults &) {
365     return Result();
366   }
367   static StringRef name() { return "NoOpLoopAnalysis"; }
368 };
369 
370 AnalysisKey NoOpModuleAnalysis::Key;
371 AnalysisKey NoOpCGSCCAnalysis::Key;
372 AnalysisKey NoOpFunctionAnalysis::Key;
373 AnalysisKey NoOpLoopAnalysis::Key;
374 
375 /// Whether or not we should populate a PassInstrumentationCallbacks's class to
376 /// pass name map.
377 ///
378 /// This is for optimization purposes so we don't populate it if we never use
379 /// it. This should be updated if new pass instrumentation wants to use the map.
380 /// We currently only use this for --print-before/after.
381 bool shouldPopulateClassToPassNames() {
382   return PrintPipelinePasses || !printBeforePasses().empty() ||
383          !printAfterPasses().empty() || !isFilterPassesEmpty();
384 }
385 
386 // A pass for testing -print-on-crash.
387 // DO NOT USE THIS EXCEPT FOR TESTING!
388 class TriggerCrashPass : public PassInfoMixin<TriggerCrashPass> {
389 public:
390   PreservedAnalyses run(Module &, ModuleAnalysisManager &) {
391     abort();
392     return PreservedAnalyses::all();
393   }
394   static StringRef name() { return "TriggerCrashPass"; }
395 };
396 
397 } // namespace
398 
399 PassBuilder::PassBuilder(TargetMachine *TM, PipelineTuningOptions PTO,
400                          std::optional<PGOOptions> PGOOpt,
401                          PassInstrumentationCallbacks *PIC)
402     : TM(TM), PTO(PTO), PGOOpt(PGOOpt), PIC(PIC) {
403   if (TM)
404     TM->registerPassBuilderCallbacks(*this);
405   if (PIC && shouldPopulateClassToPassNames()) {
406 #define MODULE_PASS(NAME, CREATE_PASS)                                         \
407   PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
408 #define MODULE_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)      \
409   PIC->addClassToPassName(CLASS, NAME);
410 #define MODULE_ANALYSIS(NAME, CREATE_PASS)                                     \
411   PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
412 #define FUNCTION_PASS(NAME, CREATE_PASS)                                       \
413   PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
414 #define FUNCTION_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)    \
415   PIC->addClassToPassName(CLASS, NAME);
416 #define FUNCTION_ANALYSIS(NAME, CREATE_PASS)                                   \
417   PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
418 #define LOOPNEST_PASS(NAME, CREATE_PASS)                                       \
419   PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
420 #define LOOP_PASS(NAME, CREATE_PASS)                                           \
421   PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
422 #define LOOP_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)        \
423   PIC->addClassToPassName(CLASS, NAME);
424 #define LOOP_ANALYSIS(NAME, CREATE_PASS)                                       \
425   PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
426 #define CGSCC_PASS(NAME, CREATE_PASS)                                          \
427   PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
428 #define CGSCC_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)       \
429   PIC->addClassToPassName(CLASS, NAME);
430 #define CGSCC_ANALYSIS(NAME, CREATE_PASS)                                      \
431   PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
432 #include "PassRegistry.def"
433   }
434 }
435 
436 void PassBuilder::registerModuleAnalyses(ModuleAnalysisManager &MAM) {
437 #define MODULE_ANALYSIS(NAME, CREATE_PASS)                                     \
438   MAM.registerPass([&] { return CREATE_PASS; });
439 #include "PassRegistry.def"
440 
441   for (auto &C : ModuleAnalysisRegistrationCallbacks)
442     C(MAM);
443 }
444 
445 void PassBuilder::registerCGSCCAnalyses(CGSCCAnalysisManager &CGAM) {
446 #define CGSCC_ANALYSIS(NAME, CREATE_PASS)                                      \
447   CGAM.registerPass([&] { return CREATE_PASS; });
448 #include "PassRegistry.def"
449 
450   for (auto &C : CGSCCAnalysisRegistrationCallbacks)
451     C(CGAM);
452 }
453 
454 void PassBuilder::registerFunctionAnalyses(FunctionAnalysisManager &FAM) {
455   // We almost always want the default alias analysis pipeline.
456   // If a user wants a different one, they can register their own before calling
457   // registerFunctionAnalyses().
458   FAM.registerPass([&] { return buildDefaultAAPipeline(); });
459 
460 #define FUNCTION_ANALYSIS(NAME, CREATE_PASS)                                   \
461   FAM.registerPass([&] { return CREATE_PASS; });
462 #include "PassRegistry.def"
463 
464   for (auto &C : FunctionAnalysisRegistrationCallbacks)
465     C(FAM);
466 }
467 
468 void PassBuilder::registerLoopAnalyses(LoopAnalysisManager &LAM) {
469 #define LOOP_ANALYSIS(NAME, CREATE_PASS)                                       \
470   LAM.registerPass([&] { return CREATE_PASS; });
471 #include "PassRegistry.def"
472 
473   for (auto &C : LoopAnalysisRegistrationCallbacks)
474     C(LAM);
475 }
476 
477 static std::optional<int> parseRepeatPassName(StringRef Name) {
478   if (!Name.consume_front("repeat<") || !Name.consume_back(">"))
479     return std::nullopt;
480   int Count;
481   if (Name.getAsInteger(0, Count) || Count <= 0)
482     return std::nullopt;
483   return Count;
484 }
485 
486 static std::optional<int> parseDevirtPassName(StringRef Name) {
487   if (!Name.consume_front("devirt<") || !Name.consume_back(">"))
488     return std::nullopt;
489   int Count;
490   if (Name.getAsInteger(0, Count) || Count < 0)
491     return std::nullopt;
492   return Count;
493 }
494 
495 static bool checkParametrizedPassName(StringRef Name, StringRef PassName) {
496   if (!Name.consume_front(PassName))
497     return false;
498   // normal pass name w/o parameters == default parameters
499   if (Name.empty())
500     return true;
501   return Name.startswith("<") && Name.endswith(">");
502 }
503 
504 namespace {
505 
506 /// This performs customized parsing of pass name with parameters.
507 ///
508 /// We do not need parametrization of passes in textual pipeline very often,
509 /// yet on a rare occasion ability to specify parameters right there can be
510 /// useful.
511 ///
512 /// \p Name - parameterized specification of a pass from a textual pipeline
513 /// is a string in a form of :
514 ///      PassName '<' parameter-list '>'
515 ///
516 /// Parameter list is being parsed by the parser callable argument, \p Parser,
517 /// It takes a string-ref of parameters and returns either StringError or a
518 /// parameter list in a form of a custom parameters type, all wrapped into
519 /// Expected<> template class.
520 ///
521 template <typename ParametersParseCallableT>
522 auto parsePassParameters(ParametersParseCallableT &&Parser, StringRef Name,
523                          StringRef PassName) -> decltype(Parser(StringRef{})) {
524   using ParametersT = typename decltype(Parser(StringRef{}))::value_type;
525 
526   StringRef Params = Name;
527   if (!Params.consume_front(PassName)) {
528     assert(false &&
529            "unable to strip pass name from parametrized pass specification");
530   }
531   if (!Params.empty() &&
532       (!Params.consume_front("<") || !Params.consume_back(">"))) {
533     assert(false && "invalid format for parametrized pass name");
534   }
535 
536   Expected<ParametersT> Result = Parser(Params);
537   assert((Result || Result.template errorIsA<StringError>()) &&
538          "Pass parameter parser can only return StringErrors.");
539   return Result;
540 }
541 
542 /// Parser of parameters for LoopUnroll pass.
543 Expected<LoopUnrollOptions> parseLoopUnrollOptions(StringRef Params) {
544   LoopUnrollOptions UnrollOpts;
545   while (!Params.empty()) {
546     StringRef ParamName;
547     std::tie(ParamName, Params) = Params.split(';');
548     int OptLevel = StringSwitch<int>(ParamName)
549                        .Case("O0", 0)
550                        .Case("O1", 1)
551                        .Case("O2", 2)
552                        .Case("O3", 3)
553                        .Default(-1);
554     if (OptLevel >= 0) {
555       UnrollOpts.setOptLevel(OptLevel);
556       continue;
557     }
558     if (ParamName.consume_front("full-unroll-max=")) {
559       int Count;
560       if (ParamName.getAsInteger(0, Count))
561         return make_error<StringError>(
562             formatv("invalid LoopUnrollPass parameter '{0}' ", ParamName).str(),
563             inconvertibleErrorCode());
564       UnrollOpts.setFullUnrollMaxCount(Count);
565       continue;
566     }
567 
568     bool Enable = !ParamName.consume_front("no-");
569     if (ParamName == "partial") {
570       UnrollOpts.setPartial(Enable);
571     } else if (ParamName == "peeling") {
572       UnrollOpts.setPeeling(Enable);
573     } else if (ParamName == "profile-peeling") {
574       UnrollOpts.setProfileBasedPeeling(Enable);
575     } else if (ParamName == "runtime") {
576       UnrollOpts.setRuntime(Enable);
577     } else if (ParamName == "upperbound") {
578       UnrollOpts.setUpperBound(Enable);
579     } else {
580       return make_error<StringError>(
581           formatv("invalid LoopUnrollPass parameter '{0}' ", ParamName).str(),
582           inconvertibleErrorCode());
583     }
584   }
585   return UnrollOpts;
586 }
587 
588 Expected<bool> parseSinglePassOption(StringRef Params, StringRef OptionName,
589                                      StringRef PassName) {
590   bool Result = false;
591   while (!Params.empty()) {
592     StringRef ParamName;
593     std::tie(ParamName, Params) = Params.split(';');
594 
595     if (ParamName == OptionName) {
596       Result = true;
597     } else {
598       return make_error<StringError>(
599           formatv("invalid {1} pass parameter '{0}' ", ParamName, PassName)
600               .str(),
601           inconvertibleErrorCode());
602     }
603   }
604   return Result;
605 }
606 
607 Expected<bool> parseInlinerPassOptions(StringRef Params) {
608   return parseSinglePassOption(Params, "only-mandatory", "InlinerPass");
609 }
610 
611 Expected<bool> parseCoroSplitPassOptions(StringRef Params) {
612   return parseSinglePassOption(Params, "reuse-storage", "CoroSplitPass");
613 }
614 
615 Expected<bool> parseEarlyCSEPassOptions(StringRef Params) {
616   return parseSinglePassOption(Params, "memssa", "EarlyCSE");
617 }
618 
619 Expected<bool> parseEntryExitInstrumenterPassOptions(StringRef Params) {
620   return parseSinglePassOption(Params, "post-inline", "EntryExitInstrumenter");
621 }
622 
623 Expected<bool> parseLoopExtractorPassOptions(StringRef Params) {
624   return parseSinglePassOption(Params, "single", "LoopExtractor");
625 }
626 
627 Expected<bool> parseLowerMatrixIntrinsicsPassOptions(StringRef Params) {
628   return parseSinglePassOption(Params, "minimal", "LowerMatrixIntrinsics");
629 }
630 
631 Expected<AddressSanitizerOptions> parseASanPassOptions(StringRef Params) {
632   AddressSanitizerOptions Result;
633   while (!Params.empty()) {
634     StringRef ParamName;
635     std::tie(ParamName, Params) = Params.split(';');
636 
637     if (ParamName == "kernel") {
638       Result.CompileKernel = true;
639     } else {
640       return make_error<StringError>(
641           formatv("invalid AddressSanitizer pass parameter '{0}' ", ParamName)
642               .str(),
643           inconvertibleErrorCode());
644     }
645   }
646   return Result;
647 }
648 
649 Expected<HWAddressSanitizerOptions> parseHWASanPassOptions(StringRef Params) {
650   HWAddressSanitizerOptions Result;
651   while (!Params.empty()) {
652     StringRef ParamName;
653     std::tie(ParamName, Params) = Params.split(';');
654 
655     if (ParamName == "recover") {
656       Result.Recover = true;
657     } else if (ParamName == "kernel") {
658       Result.CompileKernel = true;
659     } else {
660       return make_error<StringError>(
661           formatv("invalid HWAddressSanitizer pass parameter '{0}' ", ParamName)
662               .str(),
663           inconvertibleErrorCode());
664     }
665   }
666   return Result;
667 }
668 
669 Expected<MemorySanitizerOptions> parseMSanPassOptions(StringRef Params) {
670   MemorySanitizerOptions Result;
671   while (!Params.empty()) {
672     StringRef ParamName;
673     std::tie(ParamName, Params) = Params.split(';');
674 
675     if (ParamName == "recover") {
676       Result.Recover = true;
677     } else if (ParamName == "kernel") {
678       Result.Kernel = true;
679     } else if (ParamName.consume_front("track-origins=")) {
680       if (ParamName.getAsInteger(0, Result.TrackOrigins))
681         return make_error<StringError>(
682             formatv("invalid argument to MemorySanitizer pass track-origins "
683                     "parameter: '{0}' ",
684                     ParamName)
685                 .str(),
686             inconvertibleErrorCode());
687     } else if (ParamName == "eager-checks") {
688       Result.EagerChecks = true;
689     } else {
690       return make_error<StringError>(
691           formatv("invalid MemorySanitizer pass parameter '{0}' ", ParamName)
692               .str(),
693           inconvertibleErrorCode());
694     }
695   }
696   return Result;
697 }
698 
699 /// Parser of parameters for SimplifyCFG pass.
700 Expected<SimplifyCFGOptions> parseSimplifyCFGOptions(StringRef Params) {
701   SimplifyCFGOptions Result;
702   while (!Params.empty()) {
703     StringRef ParamName;
704     std::tie(ParamName, Params) = Params.split(';');
705 
706     bool Enable = !ParamName.consume_front("no-");
707     if (ParamName == "forward-switch-cond") {
708       Result.forwardSwitchCondToPhi(Enable);
709     } else if (ParamName == "switch-range-to-icmp") {
710       Result.convertSwitchRangeToICmp(Enable);
711     } else if (ParamName == "switch-to-lookup") {
712       Result.convertSwitchToLookupTable(Enable);
713     } else if (ParamName == "keep-loops") {
714       Result.needCanonicalLoops(Enable);
715     } else if (ParamName == "hoist-common-insts") {
716       Result.hoistCommonInsts(Enable);
717     } else if (ParamName == "sink-common-insts") {
718       Result.sinkCommonInsts(Enable);
719     } else if (Enable && ParamName.consume_front("bonus-inst-threshold=")) {
720       APInt BonusInstThreshold;
721       if (ParamName.getAsInteger(0, BonusInstThreshold))
722         return make_error<StringError>(
723             formatv("invalid argument to SimplifyCFG pass bonus-threshold "
724                     "parameter: '{0}' ",
725                     ParamName).str(),
726             inconvertibleErrorCode());
727       Result.bonusInstThreshold(BonusInstThreshold.getSExtValue());
728     } else {
729       return make_error<StringError>(
730           formatv("invalid SimplifyCFG pass parameter '{0}' ", ParamName).str(),
731           inconvertibleErrorCode());
732     }
733   }
734   return Result;
735 }
736 
737 /// Parser of parameters for LoopVectorize pass.
738 Expected<LoopVectorizeOptions> parseLoopVectorizeOptions(StringRef Params) {
739   LoopVectorizeOptions Opts;
740   while (!Params.empty()) {
741     StringRef ParamName;
742     std::tie(ParamName, Params) = Params.split(';');
743 
744     bool Enable = !ParamName.consume_front("no-");
745     if (ParamName == "interleave-forced-only") {
746       Opts.setInterleaveOnlyWhenForced(Enable);
747     } else if (ParamName == "vectorize-forced-only") {
748       Opts.setVectorizeOnlyWhenForced(Enable);
749     } else {
750       return make_error<StringError>(
751           formatv("invalid LoopVectorize parameter '{0}' ", ParamName).str(),
752           inconvertibleErrorCode());
753     }
754   }
755   return Opts;
756 }
757 
758 Expected<std::pair<bool, bool>> parseLoopUnswitchOptions(StringRef Params) {
759   std::pair<bool, bool> Result = {false, true};
760   while (!Params.empty()) {
761     StringRef ParamName;
762     std::tie(ParamName, Params) = Params.split(';');
763 
764     bool Enable = !ParamName.consume_front("no-");
765     if (ParamName == "nontrivial") {
766       Result.first = Enable;
767     } else if (ParamName == "trivial") {
768       Result.second = Enable;
769     } else {
770       return make_error<StringError>(
771           formatv("invalid LoopUnswitch pass parameter '{0}' ", ParamName)
772               .str(),
773           inconvertibleErrorCode());
774     }
775   }
776   return Result;
777 }
778 
779 Expected<LICMOptions> parseLICMOptions(StringRef Params) {
780   LICMOptions Result;
781   while (!Params.empty()) {
782     StringRef ParamName;
783     std::tie(ParamName, Params) = Params.split(';');
784 
785     bool Enable = !ParamName.consume_front("no-");
786     if (ParamName == "allowspeculation") {
787       Result.AllowSpeculation = Enable;
788     } else {
789       return make_error<StringError>(
790           formatv("invalid LICM pass parameter '{0}' ", ParamName).str(),
791           inconvertibleErrorCode());
792     }
793   }
794   return Result;
795 }
796 
797 Expected<bool> parseMergedLoadStoreMotionOptions(StringRef Params) {
798   bool Result = false;
799   while (!Params.empty()) {
800     StringRef ParamName;
801     std::tie(ParamName, Params) = Params.split(';');
802 
803     bool Enable = !ParamName.consume_front("no-");
804     if (ParamName == "split-footer-bb") {
805       Result = Enable;
806     } else {
807       return make_error<StringError>(
808           formatv("invalid MergedLoadStoreMotion pass parameter '{0}' ",
809                   ParamName)
810               .str(),
811           inconvertibleErrorCode());
812     }
813   }
814   return Result;
815 }
816 
817 Expected<GVNOptions> parseGVNOptions(StringRef Params) {
818   GVNOptions Result;
819   while (!Params.empty()) {
820     StringRef ParamName;
821     std::tie(ParamName, Params) = Params.split(';');
822 
823     bool Enable = !ParamName.consume_front("no-");
824     if (ParamName == "pre") {
825       Result.setPRE(Enable);
826     } else if (ParamName == "load-pre") {
827       Result.setLoadPRE(Enable);
828     } else if (ParamName == "split-backedge-load-pre") {
829       Result.setLoadPRESplitBackedge(Enable);
830     } else if (ParamName == "memdep") {
831       Result.setMemDep(Enable);
832     } else {
833       return make_error<StringError>(
834           formatv("invalid GVN pass parameter '{0}' ", ParamName).str(),
835           inconvertibleErrorCode());
836     }
837   }
838   return Result;
839 }
840 
841 Expected<IPSCCPOptions> parseIPSCCPOptions(StringRef Params) {
842   IPSCCPOptions Result;
843   while (!Params.empty()) {
844     StringRef ParamName;
845     std::tie(ParamName, Params) = Params.split(';');
846 
847     bool Enable = !ParamName.consume_front("no-");
848     if (ParamName == "func-spec")
849       Result.setFuncSpec(Enable);
850     else
851       return make_error<StringError>(
852           formatv("invalid IPSCCP pass parameter '{0}' ", ParamName).str(),
853           inconvertibleErrorCode());
854   }
855   return Result;
856 }
857 
858 Expected<SROAOptions> parseSROAOptions(StringRef Params) {
859   if (Params.empty() || Params == "modify-cfg")
860     return SROAOptions::ModifyCFG;
861   if (Params == "preserve-cfg")
862     return SROAOptions::PreserveCFG;
863   return make_error<StringError>(
864       formatv("invalid SROA pass parameter '{0}' (either preserve-cfg or "
865               "modify-cfg can be specified)",
866               Params)
867           .str(),
868       inconvertibleErrorCode());
869 }
870 
871 Expected<StackLifetime::LivenessType>
872 parseStackLifetimeOptions(StringRef Params) {
873   StackLifetime::LivenessType Result = StackLifetime::LivenessType::May;
874   while (!Params.empty()) {
875     StringRef ParamName;
876     std::tie(ParamName, Params) = Params.split(';');
877 
878     if (ParamName == "may") {
879       Result = StackLifetime::LivenessType::May;
880     } else if (ParamName == "must") {
881       Result = StackLifetime::LivenessType::Must;
882     } else {
883       return make_error<StringError>(
884           formatv("invalid StackLifetime parameter '{0}' ", ParamName).str(),
885           inconvertibleErrorCode());
886     }
887   }
888   return Result;
889 }
890 
891 Expected<bool> parseDependenceAnalysisPrinterOptions(StringRef Params) {
892   return parseSinglePassOption(Params, "normalized-results",
893                                "DependenceAnalysisPrinter");
894 }
895 
896 } // namespace
897 
898 /// Tests whether a pass name starts with a valid prefix for a default pipeline
899 /// alias.
900 static bool startsWithDefaultPipelineAliasPrefix(StringRef Name) {
901   return Name.startswith("default") || Name.startswith("thinlto") ||
902          Name.startswith("lto");
903 }
904 
905 /// Tests whether registered callbacks will accept a given pass name.
906 ///
907 /// When parsing a pipeline text, the type of the outermost pipeline may be
908 /// omitted, in which case the type is automatically determined from the first
909 /// pass name in the text. This may be a name that is handled through one of the
910 /// callbacks. We check this through the oridinary parsing callbacks by setting
911 /// up a dummy PassManager in order to not force the client to also handle this
912 /// type of query.
913 template <typename PassManagerT, typename CallbacksT>
914 static bool callbacksAcceptPassName(StringRef Name, CallbacksT &Callbacks) {
915   if (!Callbacks.empty()) {
916     PassManagerT DummyPM;
917     for (auto &CB : Callbacks)
918       if (CB(Name, DummyPM, {}))
919         return true;
920   }
921   return false;
922 }
923 
924 template <typename CallbacksT>
925 static bool isModulePassName(StringRef Name, CallbacksT &Callbacks) {
926   // Manually handle aliases for pre-configured pipeline fragments.
927   if (startsWithDefaultPipelineAliasPrefix(Name))
928     return DefaultAliasRegex.match(Name);
929 
930   // Explicitly handle pass manager names.
931   if (Name == "module")
932     return true;
933   if (Name == "cgscc")
934     return true;
935   if (Name == "function" || Name == "function<eager-inv>")
936     return true;
937   if (Name == "coro-cond")
938     return true;
939 
940   // Explicitly handle custom-parsed pass names.
941   if (parseRepeatPassName(Name))
942     return true;
943 
944 #define MODULE_PASS(NAME, CREATE_PASS)                                         \
945   if (Name == NAME)                                                            \
946     return true;
947 #define MODULE_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)      \
948   if (checkParametrizedPassName(Name, NAME))                                   \
949     return true;
950 #define MODULE_ANALYSIS(NAME, CREATE_PASS)                                     \
951   if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">")           \
952     return true;
953 #include "PassRegistry.def"
954 
955   return callbacksAcceptPassName<ModulePassManager>(Name, Callbacks);
956 }
957 
958 template <typename CallbacksT>
959 static bool isCGSCCPassName(StringRef Name, CallbacksT &Callbacks) {
960   // Explicitly handle pass manager names.
961   if (Name == "cgscc")
962     return true;
963   if (Name == "function" || Name == "function<eager-inv>")
964     return true;
965 
966   // Explicitly handle custom-parsed pass names.
967   if (parseRepeatPassName(Name))
968     return true;
969   if (parseDevirtPassName(Name))
970     return true;
971 
972 #define CGSCC_PASS(NAME, CREATE_PASS)                                          \
973   if (Name == NAME)                                                            \
974     return true;
975 #define CGSCC_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)       \
976   if (checkParametrizedPassName(Name, NAME))                                   \
977     return true;
978 #define CGSCC_ANALYSIS(NAME, CREATE_PASS)                                      \
979   if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">")           \
980     return true;
981 #include "PassRegistry.def"
982 
983   return callbacksAcceptPassName<CGSCCPassManager>(Name, Callbacks);
984 }
985 
986 template <typename CallbacksT>
987 static bool isFunctionPassName(StringRef Name, CallbacksT &Callbacks) {
988   // Explicitly handle pass manager names.
989   if (Name == "function" || Name == "function<eager-inv>")
990     return true;
991   if (Name == "loop" || Name == "loop-mssa")
992     return true;
993 
994   // Explicitly handle custom-parsed pass names.
995   if (parseRepeatPassName(Name))
996     return true;
997 
998 #define FUNCTION_PASS(NAME, CREATE_PASS)                                       \
999   if (Name == NAME)                                                            \
1000     return true;
1001 #define FUNCTION_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)    \
1002   if (checkParametrizedPassName(Name, NAME))                                   \
1003     return true;
1004 #define FUNCTION_ANALYSIS(NAME, CREATE_PASS)                                   \
1005   if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">")           \
1006     return true;
1007 #include "PassRegistry.def"
1008 
1009   return callbacksAcceptPassName<FunctionPassManager>(Name, Callbacks);
1010 }
1011 
1012 template <typename CallbacksT>
1013 static bool isLoopNestPassName(StringRef Name, CallbacksT &Callbacks,
1014                                bool &UseMemorySSA) {
1015   UseMemorySSA = false;
1016 
1017   // Explicitly handle custom-parsed pass names.
1018   if (parseRepeatPassName(Name))
1019     return true;
1020 
1021   if (checkParametrizedPassName(Name, "lnicm")) {
1022     UseMemorySSA = true;
1023     return true;
1024   }
1025 
1026 #define LOOPNEST_PASS(NAME, CREATE_PASS)                                       \
1027   if (Name == NAME)                                                            \
1028     return true;
1029 #include "PassRegistry.def"
1030 
1031   return callbacksAcceptPassName<LoopPassManager>(Name, Callbacks);
1032 }
1033 
1034 template <typename CallbacksT>
1035 static bool isLoopPassName(StringRef Name, CallbacksT &Callbacks,
1036                            bool &UseMemorySSA) {
1037   UseMemorySSA = false;
1038 
1039   // Explicitly handle custom-parsed pass names.
1040   if (parseRepeatPassName(Name))
1041     return true;
1042 
1043   if (checkParametrizedPassName(Name, "licm")) {
1044     UseMemorySSA = true;
1045     return true;
1046   }
1047 
1048 #define LOOP_PASS(NAME, CREATE_PASS)                                           \
1049   if (Name == NAME)                                                            \
1050     return true;
1051 #define LOOP_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)        \
1052   if (checkParametrizedPassName(Name, NAME))                                   \
1053     return true;
1054 #define LOOP_ANALYSIS(NAME, CREATE_PASS)                                       \
1055   if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">")           \
1056     return true;
1057 #include "PassRegistry.def"
1058 
1059   return callbacksAcceptPassName<LoopPassManager>(Name, Callbacks);
1060 }
1061 
1062 std::optional<std::vector<PassBuilder::PipelineElement>>
1063 PassBuilder::parsePipelineText(StringRef Text) {
1064   std::vector<PipelineElement> ResultPipeline;
1065 
1066   SmallVector<std::vector<PipelineElement> *, 4> PipelineStack = {
1067       &ResultPipeline};
1068   for (;;) {
1069     std::vector<PipelineElement> &Pipeline = *PipelineStack.back();
1070     size_t Pos = Text.find_first_of(",()");
1071     Pipeline.push_back({Text.substr(0, Pos), {}});
1072 
1073     // If we have a single terminating name, we're done.
1074     if (Pos == Text.npos)
1075       break;
1076 
1077     char Sep = Text[Pos];
1078     Text = Text.substr(Pos + 1);
1079     if (Sep == ',')
1080       // Just a name ending in a comma, continue.
1081       continue;
1082 
1083     if (Sep == '(') {
1084       // Push the inner pipeline onto the stack to continue processing.
1085       PipelineStack.push_back(&Pipeline.back().InnerPipeline);
1086       continue;
1087     }
1088 
1089     assert(Sep == ')' && "Bogus separator!");
1090     // When handling the close parenthesis, we greedily consume them to avoid
1091     // empty strings in the pipeline.
1092     do {
1093       // If we try to pop the outer pipeline we have unbalanced parentheses.
1094       if (PipelineStack.size() == 1)
1095         return std::nullopt;
1096 
1097       PipelineStack.pop_back();
1098     } while (Text.consume_front(")"));
1099 
1100     // Check if we've finished parsing.
1101     if (Text.empty())
1102       break;
1103 
1104     // Otherwise, the end of an inner pipeline always has to be followed by
1105     // a comma, and then we can continue.
1106     if (!Text.consume_front(","))
1107       return std::nullopt;
1108   }
1109 
1110   if (PipelineStack.size() > 1)
1111     // Unbalanced paretheses.
1112     return std::nullopt;
1113 
1114   assert(PipelineStack.back() == &ResultPipeline &&
1115          "Wrong pipeline at the bottom of the stack!");
1116   return {std::move(ResultPipeline)};
1117 }
1118 
1119 Error PassBuilder::parseModulePass(ModulePassManager &MPM,
1120                                    const PipelineElement &E) {
1121   auto &Name = E.Name;
1122   auto &InnerPipeline = E.InnerPipeline;
1123 
1124   // First handle complex passes like the pass managers which carry pipelines.
1125   if (!InnerPipeline.empty()) {
1126     if (Name == "module") {
1127       ModulePassManager NestedMPM;
1128       if (auto Err = parseModulePassPipeline(NestedMPM, InnerPipeline))
1129         return Err;
1130       MPM.addPass(std::move(NestedMPM));
1131       return Error::success();
1132     }
1133     if (Name == "coro-cond") {
1134       ModulePassManager NestedMPM;
1135       if (auto Err = parseModulePassPipeline(NestedMPM, InnerPipeline))
1136         return Err;
1137       MPM.addPass(CoroConditionalWrapper(std::move(NestedMPM)));
1138       return Error::success();
1139     }
1140     if (Name == "cgscc") {
1141       CGSCCPassManager CGPM;
1142       if (auto Err = parseCGSCCPassPipeline(CGPM, InnerPipeline))
1143         return Err;
1144       MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM)));
1145       return Error::success();
1146     }
1147     if (Name == "function" || Name == "function<eager-inv>") {
1148       FunctionPassManager FPM;
1149       if (auto Err = parseFunctionPassPipeline(FPM, InnerPipeline))
1150         return Err;
1151       MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM),
1152                                                     Name != "function"));
1153       return Error::success();
1154     }
1155     if (auto Count = parseRepeatPassName(Name)) {
1156       ModulePassManager NestedMPM;
1157       if (auto Err = parseModulePassPipeline(NestedMPM, InnerPipeline))
1158         return Err;
1159       MPM.addPass(createRepeatedPass(*Count, std::move(NestedMPM)));
1160       return Error::success();
1161     }
1162 
1163     for (auto &C : ModulePipelineParsingCallbacks)
1164       if (C(Name, MPM, InnerPipeline))
1165         return Error::success();
1166 
1167     // Normal passes can't have pipelines.
1168     return make_error<StringError>(
1169         formatv("invalid use of '{0}' pass as module pipeline", Name).str(),
1170         inconvertibleErrorCode());
1171     ;
1172   }
1173 
1174   // Manually handle aliases for pre-configured pipeline fragments.
1175   if (startsWithDefaultPipelineAliasPrefix(Name)) {
1176     SmallVector<StringRef, 3> Matches;
1177     if (!DefaultAliasRegex.match(Name, &Matches))
1178       return make_error<StringError>(
1179           formatv("unknown default pipeline alias '{0}'", Name).str(),
1180           inconvertibleErrorCode());
1181 
1182     assert(Matches.size() == 3 && "Must capture two matched strings!");
1183 
1184     OptimizationLevel L = StringSwitch<OptimizationLevel>(Matches[2])
1185                               .Case("O0", OptimizationLevel::O0)
1186                               .Case("O1", OptimizationLevel::O1)
1187                               .Case("O2", OptimizationLevel::O2)
1188                               .Case("O3", OptimizationLevel::O3)
1189                               .Case("Os", OptimizationLevel::Os)
1190                               .Case("Oz", OptimizationLevel::Oz);
1191     if (L == OptimizationLevel::O0 && Matches[1] != "thinlto" &&
1192         Matches[1] != "lto") {
1193       MPM.addPass(buildO0DefaultPipeline(L, Matches[1] == "thinlto-pre-link" ||
1194                                                 Matches[1] == "lto-pre-link"));
1195       return Error::success();
1196     }
1197 
1198     // This is consistent with old pass manager invoked via opt, but
1199     // inconsistent with clang. Clang doesn't enable loop vectorization
1200     // but does enable slp vectorization at Oz.
1201     PTO.LoopVectorization =
1202         L.getSpeedupLevel() > 1 && L != OptimizationLevel::Oz;
1203     PTO.SLPVectorization =
1204         L.getSpeedupLevel() > 1 && L != OptimizationLevel::Oz;
1205 
1206     if (Matches[1] == "default") {
1207       MPM.addPass(buildPerModuleDefaultPipeline(L));
1208     } else if (Matches[1] == "thinlto-pre-link") {
1209       MPM.addPass(buildThinLTOPreLinkDefaultPipeline(L));
1210     } else if (Matches[1] == "thinlto") {
1211       MPM.addPass(buildThinLTODefaultPipeline(L, nullptr));
1212     } else if (Matches[1] == "lto-pre-link") {
1213       MPM.addPass(buildLTOPreLinkDefaultPipeline(L));
1214     } else {
1215       assert(Matches[1] == "lto" && "Not one of the matched options!");
1216       MPM.addPass(buildLTODefaultPipeline(L, nullptr));
1217     }
1218     return Error::success();
1219   }
1220 
1221   // Finally expand the basic registered passes from the .inc file.
1222 #define MODULE_PASS(NAME, CREATE_PASS)                                         \
1223   if (Name == NAME) {                                                          \
1224     MPM.addPass(CREATE_PASS);                                                  \
1225     return Error::success();                                                   \
1226   }
1227 #define MODULE_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)      \
1228   if (checkParametrizedPassName(Name, NAME)) {                                 \
1229     auto Params = parsePassParameters(PARSER, Name, NAME);                     \
1230     if (!Params)                                                               \
1231       return Params.takeError();                                               \
1232     MPM.addPass(CREATE_PASS(Params.get()));                                    \
1233     return Error::success();                                                   \
1234   }
1235 #define MODULE_ANALYSIS(NAME, CREATE_PASS)                                     \
1236   if (Name == "require<" NAME ">") {                                           \
1237     MPM.addPass(                                                               \
1238         RequireAnalysisPass<                                                   \
1239             std::remove_reference_t<decltype(CREATE_PASS)>, Module>());        \
1240     return Error::success();                                                   \
1241   }                                                                            \
1242   if (Name == "invalidate<" NAME ">") {                                        \
1243     MPM.addPass(InvalidateAnalysisPass<                                        \
1244                 std::remove_reference_t<decltype(CREATE_PASS)>>());            \
1245     return Error::success();                                                   \
1246   }
1247 #define CGSCC_PASS(NAME, CREATE_PASS)                                          \
1248   if (Name == NAME) {                                                          \
1249     MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(CREATE_PASS));         \
1250     return Error::success();                                                   \
1251   }
1252 #define CGSCC_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)       \
1253   if (checkParametrizedPassName(Name, NAME)) {                                 \
1254     auto Params = parsePassParameters(PARSER, Name, NAME);                     \
1255     if (!Params)                                                               \
1256       return Params.takeError();                                               \
1257     MPM.addPass(                                                               \
1258         createModuleToPostOrderCGSCCPassAdaptor(CREATE_PASS(Params.get())));   \
1259     return Error::success();                                                   \
1260   }
1261 #define FUNCTION_PASS(NAME, CREATE_PASS)                                       \
1262   if (Name == NAME) {                                                          \
1263     MPM.addPass(createModuleToFunctionPassAdaptor(CREATE_PASS));               \
1264     return Error::success();                                                   \
1265   }
1266 #define FUNCTION_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)    \
1267   if (checkParametrizedPassName(Name, NAME)) {                                 \
1268     auto Params = parsePassParameters(PARSER, Name, NAME);                     \
1269     if (!Params)                                                               \
1270       return Params.takeError();                                               \
1271     MPM.addPass(createModuleToFunctionPassAdaptor(CREATE_PASS(Params.get()))); \
1272     return Error::success();                                                   \
1273   }
1274 #define LOOPNEST_PASS(NAME, CREATE_PASS)                                       \
1275   if (Name == NAME) {                                                          \
1276     MPM.addPass(createModuleToFunctionPassAdaptor(                             \
1277         createFunctionToLoopPassAdaptor(CREATE_PASS, false, false)));          \
1278     return Error::success();                                                   \
1279   }
1280 #define LOOP_PASS(NAME, CREATE_PASS)                                           \
1281   if (Name == NAME) {                                                          \
1282     MPM.addPass(createModuleToFunctionPassAdaptor(                             \
1283         createFunctionToLoopPassAdaptor(CREATE_PASS, false, false)));          \
1284     return Error::success();                                                   \
1285   }
1286 #define LOOP_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)        \
1287   if (checkParametrizedPassName(Name, NAME)) {                                 \
1288     auto Params = parsePassParameters(PARSER, Name, NAME);                     \
1289     if (!Params)                                                               \
1290       return Params.takeError();                                               \
1291     MPM.addPass(                                                               \
1292         createModuleToFunctionPassAdaptor(createFunctionToLoopPassAdaptor(     \
1293             CREATE_PASS(Params.get()), false, false)));                        \
1294     return Error::success();                                                   \
1295   }
1296 #include "PassRegistry.def"
1297 
1298   for (auto &C : ModulePipelineParsingCallbacks)
1299     if (C(Name, MPM, InnerPipeline))
1300       return Error::success();
1301   return make_error<StringError>(
1302       formatv("unknown module pass '{0}'", Name).str(),
1303       inconvertibleErrorCode());
1304 }
1305 
1306 Error PassBuilder::parseCGSCCPass(CGSCCPassManager &CGPM,
1307                                   const PipelineElement &E) {
1308   auto &Name = E.Name;
1309   auto &InnerPipeline = E.InnerPipeline;
1310 
1311   // First handle complex passes like the pass managers which carry pipelines.
1312   if (!InnerPipeline.empty()) {
1313     if (Name == "cgscc") {
1314       CGSCCPassManager NestedCGPM;
1315       if (auto Err = parseCGSCCPassPipeline(NestedCGPM, InnerPipeline))
1316         return Err;
1317       // Add the nested pass manager with the appropriate adaptor.
1318       CGPM.addPass(std::move(NestedCGPM));
1319       return Error::success();
1320     }
1321     if (Name == "function" || Name == "function<eager-inv>") {
1322       FunctionPassManager FPM;
1323       if (auto Err = parseFunctionPassPipeline(FPM, InnerPipeline))
1324         return Err;
1325       // Add the nested pass manager with the appropriate adaptor.
1326       CGPM.addPass(
1327           createCGSCCToFunctionPassAdaptor(std::move(FPM), Name != "function"));
1328       return Error::success();
1329     }
1330     if (auto Count = parseRepeatPassName(Name)) {
1331       CGSCCPassManager NestedCGPM;
1332       if (auto Err = parseCGSCCPassPipeline(NestedCGPM, InnerPipeline))
1333         return Err;
1334       CGPM.addPass(createRepeatedPass(*Count, std::move(NestedCGPM)));
1335       return Error::success();
1336     }
1337     if (auto MaxRepetitions = parseDevirtPassName(Name)) {
1338       CGSCCPassManager NestedCGPM;
1339       if (auto Err = parseCGSCCPassPipeline(NestedCGPM, InnerPipeline))
1340         return Err;
1341       CGPM.addPass(
1342           createDevirtSCCRepeatedPass(std::move(NestedCGPM), *MaxRepetitions));
1343       return Error::success();
1344     }
1345 
1346     for (auto &C : CGSCCPipelineParsingCallbacks)
1347       if (C(Name, CGPM, InnerPipeline))
1348         return Error::success();
1349 
1350     // Normal passes can't have pipelines.
1351     return make_error<StringError>(
1352         formatv("invalid use of '{0}' pass as cgscc pipeline", Name).str(),
1353         inconvertibleErrorCode());
1354   }
1355 
1356 // Now expand the basic registered passes from the .inc file.
1357 #define CGSCC_PASS(NAME, CREATE_PASS)                                          \
1358   if (Name == NAME) {                                                          \
1359     CGPM.addPass(CREATE_PASS);                                                 \
1360     return Error::success();                                                   \
1361   }
1362 #define CGSCC_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)       \
1363   if (checkParametrizedPassName(Name, NAME)) {                                 \
1364     auto Params = parsePassParameters(PARSER, Name, NAME);                     \
1365     if (!Params)                                                               \
1366       return Params.takeError();                                               \
1367     CGPM.addPass(CREATE_PASS(Params.get()));                                   \
1368     return Error::success();                                                   \
1369   }
1370 #define CGSCC_ANALYSIS(NAME, CREATE_PASS)                                      \
1371   if (Name == "require<" NAME ">") {                                           \
1372     CGPM.addPass(RequireAnalysisPass<                                          \
1373                  std::remove_reference_t<decltype(CREATE_PASS)>,               \
1374                  LazyCallGraph::SCC, CGSCCAnalysisManager, LazyCallGraph &,    \
1375                  CGSCCUpdateResult &>());                                      \
1376     return Error::success();                                                   \
1377   }                                                                            \
1378   if (Name == "invalidate<" NAME ">") {                                        \
1379     CGPM.addPass(InvalidateAnalysisPass<                                       \
1380                  std::remove_reference_t<decltype(CREATE_PASS)>>());           \
1381     return Error::success();                                                   \
1382   }
1383 #define FUNCTION_PASS(NAME, CREATE_PASS)                                       \
1384   if (Name == NAME) {                                                          \
1385     CGPM.addPass(createCGSCCToFunctionPassAdaptor(CREATE_PASS));               \
1386     return Error::success();                                                   \
1387   }
1388 #define FUNCTION_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)    \
1389   if (checkParametrizedPassName(Name, NAME)) {                                 \
1390     auto Params = parsePassParameters(PARSER, Name, NAME);                     \
1391     if (!Params)                                                               \
1392       return Params.takeError();                                               \
1393     CGPM.addPass(createCGSCCToFunctionPassAdaptor(CREATE_PASS(Params.get()))); \
1394     return Error::success();                                                   \
1395   }
1396 #define LOOPNEST_PASS(NAME, CREATE_PASS)                                       \
1397   if (Name == NAME) {                                                          \
1398     CGPM.addPass(createCGSCCToFunctionPassAdaptor(                             \
1399         createFunctionToLoopPassAdaptor(CREATE_PASS, false, false)));          \
1400     return Error::success();                                                   \
1401   }
1402 #define LOOP_PASS(NAME, CREATE_PASS)                                           \
1403   if (Name == NAME) {                                                          \
1404     CGPM.addPass(createCGSCCToFunctionPassAdaptor(                             \
1405         createFunctionToLoopPassAdaptor(CREATE_PASS, false, false)));          \
1406     return Error::success();                                                   \
1407   }
1408 #define LOOP_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)        \
1409   if (checkParametrizedPassName(Name, NAME)) {                                 \
1410     auto Params = parsePassParameters(PARSER, Name, NAME);                     \
1411     if (!Params)                                                               \
1412       return Params.takeError();                                               \
1413     CGPM.addPass(                                                              \
1414         createCGSCCToFunctionPassAdaptor(createFunctionToLoopPassAdaptor(      \
1415             CREATE_PASS(Params.get()), false, false)));                        \
1416     return Error::success();                                                   \
1417   }
1418 #include "PassRegistry.def"
1419 
1420   for (auto &C : CGSCCPipelineParsingCallbacks)
1421     if (C(Name, CGPM, InnerPipeline))
1422       return Error::success();
1423   return make_error<StringError>(
1424       formatv("unknown cgscc pass '{0}'", Name).str(),
1425       inconvertibleErrorCode());
1426 }
1427 
1428 Error PassBuilder::parseFunctionPass(FunctionPassManager &FPM,
1429                                      const PipelineElement &E) {
1430   auto &Name = E.Name;
1431   auto &InnerPipeline = E.InnerPipeline;
1432 
1433   // First handle complex passes like the pass managers which carry pipelines.
1434   if (!InnerPipeline.empty()) {
1435     if (Name == "function") {
1436       FunctionPassManager NestedFPM;
1437       if (auto Err = parseFunctionPassPipeline(NestedFPM, InnerPipeline))
1438         return Err;
1439       // Add the nested pass manager with the appropriate adaptor.
1440       FPM.addPass(std::move(NestedFPM));
1441       return Error::success();
1442     }
1443     if (Name == "loop" || Name == "loop-mssa") {
1444       LoopPassManager LPM;
1445       if (auto Err = parseLoopPassPipeline(LPM, InnerPipeline))
1446         return Err;
1447       // Add the nested pass manager with the appropriate adaptor.
1448       bool UseMemorySSA = (Name == "loop-mssa");
1449       bool UseBFI = llvm::any_of(InnerPipeline, [](auto Pipeline) {
1450         return Pipeline.Name.contains("simple-loop-unswitch");
1451       });
1452       bool UseBPI = llvm::any_of(InnerPipeline, [](auto Pipeline) {
1453         return Pipeline.Name == "loop-predication";
1454       });
1455       FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM), UseMemorySSA,
1456                                                   UseBFI, UseBPI));
1457       return Error::success();
1458     }
1459     if (auto Count = parseRepeatPassName(Name)) {
1460       FunctionPassManager NestedFPM;
1461       if (auto Err = parseFunctionPassPipeline(NestedFPM, InnerPipeline))
1462         return Err;
1463       FPM.addPass(createRepeatedPass(*Count, std::move(NestedFPM)));
1464       return Error::success();
1465     }
1466 
1467     for (auto &C : FunctionPipelineParsingCallbacks)
1468       if (C(Name, FPM, InnerPipeline))
1469         return Error::success();
1470 
1471     // Normal passes can't have pipelines.
1472     return make_error<StringError>(
1473         formatv("invalid use of '{0}' pass as function pipeline", Name).str(),
1474         inconvertibleErrorCode());
1475   }
1476 
1477 // Now expand the basic registered passes from the .inc file.
1478 #define FUNCTION_PASS(NAME, CREATE_PASS)                                       \
1479   if (Name == NAME) {                                                          \
1480     FPM.addPass(CREATE_PASS);                                                  \
1481     return Error::success();                                                   \
1482   }
1483 #define FUNCTION_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)    \
1484   if (checkParametrizedPassName(Name, NAME)) {                                 \
1485     auto Params = parsePassParameters(PARSER, Name, NAME);                     \
1486     if (!Params)                                                               \
1487       return Params.takeError();                                               \
1488     FPM.addPass(CREATE_PASS(Params.get()));                                    \
1489     return Error::success();                                                   \
1490   }
1491 #define FUNCTION_ANALYSIS(NAME, CREATE_PASS)                                   \
1492   if (Name == "require<" NAME ">") {                                           \
1493     FPM.addPass(                                                               \
1494         RequireAnalysisPass<                                                   \
1495             std::remove_reference_t<decltype(CREATE_PASS)>, Function>());      \
1496     return Error::success();                                                   \
1497   }                                                                            \
1498   if (Name == "invalidate<" NAME ">") {                                        \
1499     FPM.addPass(InvalidateAnalysisPass<                                        \
1500                 std::remove_reference_t<decltype(CREATE_PASS)>>());            \
1501     return Error::success();                                                   \
1502   }
1503 // FIXME: UseMemorySSA is set to false. Maybe we could do things like:
1504 //        bool UseMemorySSA = !("canon-freeze" || "loop-predication" ||
1505 //                              "guard-widening");
1506 //        The risk is that it may become obsolete if we're not careful.
1507 #define LOOPNEST_PASS(NAME, CREATE_PASS)                                       \
1508   if (Name == NAME) {                                                          \
1509     FPM.addPass(createFunctionToLoopPassAdaptor(CREATE_PASS, false, false));   \
1510     return Error::success();                                                   \
1511   }
1512 #define LOOP_PASS(NAME, CREATE_PASS)                                           \
1513   if (Name == NAME) {                                                          \
1514     FPM.addPass(createFunctionToLoopPassAdaptor(CREATE_PASS, false, false));   \
1515     return Error::success();                                                   \
1516   }
1517 #define LOOP_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)        \
1518   if (checkParametrizedPassName(Name, NAME)) {                                 \
1519     auto Params = parsePassParameters(PARSER, Name, NAME);                     \
1520     if (!Params)                                                               \
1521       return Params.takeError();                                               \
1522     FPM.addPass(createFunctionToLoopPassAdaptor(CREATE_PASS(Params.get()),     \
1523                                                 false, false));                \
1524     return Error::success();                                                   \
1525   }
1526 #include "PassRegistry.def"
1527 
1528   for (auto &C : FunctionPipelineParsingCallbacks)
1529     if (C(Name, FPM, InnerPipeline))
1530       return Error::success();
1531   return make_error<StringError>(
1532       formatv("unknown function pass '{0}'", Name).str(),
1533       inconvertibleErrorCode());
1534 }
1535 
1536 Error PassBuilder::parseLoopPass(LoopPassManager &LPM,
1537                                  const PipelineElement &E) {
1538   StringRef Name = E.Name;
1539   auto &InnerPipeline = E.InnerPipeline;
1540 
1541   // First handle complex passes like the pass managers which carry pipelines.
1542   if (!InnerPipeline.empty()) {
1543     if (Name == "loop") {
1544       LoopPassManager NestedLPM;
1545       if (auto Err = parseLoopPassPipeline(NestedLPM, InnerPipeline))
1546         return Err;
1547       // Add the nested pass manager with the appropriate adaptor.
1548       LPM.addPass(std::move(NestedLPM));
1549       return Error::success();
1550     }
1551     if (auto Count = parseRepeatPassName(Name)) {
1552       LoopPassManager NestedLPM;
1553       if (auto Err = parseLoopPassPipeline(NestedLPM, InnerPipeline))
1554         return Err;
1555       LPM.addPass(createRepeatedPass(*Count, std::move(NestedLPM)));
1556       return Error::success();
1557     }
1558 
1559     for (auto &C : LoopPipelineParsingCallbacks)
1560       if (C(Name, LPM, InnerPipeline))
1561         return Error::success();
1562 
1563     // Normal passes can't have pipelines.
1564     return make_error<StringError>(
1565         formatv("invalid use of '{0}' pass as loop pipeline", Name).str(),
1566         inconvertibleErrorCode());
1567   }
1568 
1569 // Now expand the basic registered passes from the .inc file.
1570 #define LOOPNEST_PASS(NAME, CREATE_PASS)                                       \
1571   if (Name == NAME) {                                                          \
1572     LPM.addPass(CREATE_PASS);                                                  \
1573     return Error::success();                                                   \
1574   }
1575 #define LOOP_PASS(NAME, CREATE_PASS)                                           \
1576   if (Name == NAME) {                                                          \
1577     LPM.addPass(CREATE_PASS);                                                  \
1578     return Error::success();                                                   \
1579   }
1580 #define LOOP_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)        \
1581   if (checkParametrizedPassName(Name, NAME)) {                                 \
1582     auto Params = parsePassParameters(PARSER, Name, NAME);                     \
1583     if (!Params)                                                               \
1584       return Params.takeError();                                               \
1585     LPM.addPass(CREATE_PASS(Params.get()));                                    \
1586     return Error::success();                                                   \
1587   }
1588 #define LOOP_ANALYSIS(NAME, CREATE_PASS)                                       \
1589   if (Name == "require<" NAME ">") {                                           \
1590     LPM.addPass(RequireAnalysisPass<                                           \
1591                 std::remove_reference_t<decltype(CREATE_PASS)>, Loop,          \
1592                 LoopAnalysisManager, LoopStandardAnalysisResults &,            \
1593                 LPMUpdater &>());                                              \
1594     return Error::success();                                                   \
1595   }                                                                            \
1596   if (Name == "invalidate<" NAME ">") {                                        \
1597     LPM.addPass(InvalidateAnalysisPass<                                        \
1598                 std::remove_reference_t<decltype(CREATE_PASS)>>());            \
1599     return Error::success();                                                   \
1600   }
1601 #include "PassRegistry.def"
1602 
1603   for (auto &C : LoopPipelineParsingCallbacks)
1604     if (C(Name, LPM, InnerPipeline))
1605       return Error::success();
1606   return make_error<StringError>(formatv("unknown loop pass '{0}'", Name).str(),
1607                                  inconvertibleErrorCode());
1608 }
1609 
1610 bool PassBuilder::parseAAPassName(AAManager &AA, StringRef Name) {
1611 #define MODULE_ALIAS_ANALYSIS(NAME, CREATE_PASS)                               \
1612   if (Name == NAME) {                                                          \
1613     AA.registerModuleAnalysis<                                                 \
1614         std::remove_reference_t<decltype(CREATE_PASS)>>();                     \
1615     return true;                                                               \
1616   }
1617 #define FUNCTION_ALIAS_ANALYSIS(NAME, CREATE_PASS)                             \
1618   if (Name == NAME) {                                                          \
1619     AA.registerFunctionAnalysis<                                               \
1620         std::remove_reference_t<decltype(CREATE_PASS)>>();                     \
1621     return true;                                                               \
1622   }
1623 #include "PassRegistry.def"
1624 
1625   for (auto &C : AAParsingCallbacks)
1626     if (C(Name, AA))
1627       return true;
1628   return false;
1629 }
1630 
1631 Error PassBuilder::parseLoopPassPipeline(LoopPassManager &LPM,
1632                                          ArrayRef<PipelineElement> Pipeline) {
1633   for (const auto &Element : Pipeline) {
1634     if (auto Err = parseLoopPass(LPM, Element))
1635       return Err;
1636   }
1637   return Error::success();
1638 }
1639 
1640 Error PassBuilder::parseFunctionPassPipeline(
1641     FunctionPassManager &FPM, ArrayRef<PipelineElement> Pipeline) {
1642   for (const auto &Element : Pipeline) {
1643     if (auto Err = parseFunctionPass(FPM, Element))
1644       return Err;
1645   }
1646   return Error::success();
1647 }
1648 
1649 Error PassBuilder::parseCGSCCPassPipeline(CGSCCPassManager &CGPM,
1650                                           ArrayRef<PipelineElement> Pipeline) {
1651   for (const auto &Element : Pipeline) {
1652     if (auto Err = parseCGSCCPass(CGPM, Element))
1653       return Err;
1654   }
1655   return Error::success();
1656 }
1657 
1658 void PassBuilder::crossRegisterProxies(LoopAnalysisManager &LAM,
1659                                        FunctionAnalysisManager &FAM,
1660                                        CGSCCAnalysisManager &CGAM,
1661                                        ModuleAnalysisManager &MAM) {
1662   MAM.registerPass([&] { return FunctionAnalysisManagerModuleProxy(FAM); });
1663   MAM.registerPass([&] { return CGSCCAnalysisManagerModuleProxy(CGAM); });
1664   CGAM.registerPass([&] { return ModuleAnalysisManagerCGSCCProxy(MAM); });
1665   FAM.registerPass([&] { return CGSCCAnalysisManagerFunctionProxy(CGAM); });
1666   FAM.registerPass([&] { return ModuleAnalysisManagerFunctionProxy(MAM); });
1667   FAM.registerPass([&] { return LoopAnalysisManagerFunctionProxy(LAM); });
1668   LAM.registerPass([&] { return FunctionAnalysisManagerLoopProxy(FAM); });
1669 }
1670 
1671 Error PassBuilder::parseModulePassPipeline(ModulePassManager &MPM,
1672                                            ArrayRef<PipelineElement> Pipeline) {
1673   for (const auto &Element : Pipeline) {
1674     if (auto Err = parseModulePass(MPM, Element))
1675       return Err;
1676   }
1677   return Error::success();
1678 }
1679 
1680 // Primary pass pipeline description parsing routine for a \c ModulePassManager
1681 // FIXME: Should this routine accept a TargetMachine or require the caller to
1682 // pre-populate the analysis managers with target-specific stuff?
1683 Error PassBuilder::parsePassPipeline(ModulePassManager &MPM,
1684                                      StringRef PipelineText) {
1685   auto Pipeline = parsePipelineText(PipelineText);
1686   if (!Pipeline || Pipeline->empty())
1687     return make_error<StringError>(
1688         formatv("invalid pipeline '{0}'", PipelineText).str(),
1689         inconvertibleErrorCode());
1690 
1691   // If the first name isn't at the module layer, wrap the pipeline up
1692   // automatically.
1693   StringRef FirstName = Pipeline->front().Name;
1694 
1695   if (!isModulePassName(FirstName, ModulePipelineParsingCallbacks)) {
1696     bool UseMemorySSA;
1697     if (isCGSCCPassName(FirstName, CGSCCPipelineParsingCallbacks)) {
1698       Pipeline = {{"cgscc", std::move(*Pipeline)}};
1699     } else if (isFunctionPassName(FirstName,
1700                                   FunctionPipelineParsingCallbacks)) {
1701       Pipeline = {{"function", std::move(*Pipeline)}};
1702     } else if (isLoopNestPassName(FirstName, LoopPipelineParsingCallbacks,
1703                                   UseMemorySSA)) {
1704       Pipeline = {{"function", {{UseMemorySSA ? "loop-mssa" : "loop",
1705                                  std::move(*Pipeline)}}}};
1706     } else if (isLoopPassName(FirstName, LoopPipelineParsingCallbacks,
1707                               UseMemorySSA)) {
1708       Pipeline = {{"function", {{UseMemorySSA ? "loop-mssa" : "loop",
1709                                  std::move(*Pipeline)}}}};
1710     } else {
1711       for (auto &C : TopLevelPipelineParsingCallbacks)
1712         if (C(MPM, *Pipeline))
1713           return Error::success();
1714 
1715       // Unknown pass or pipeline name!
1716       auto &InnerPipeline = Pipeline->front().InnerPipeline;
1717       return make_error<StringError>(
1718           formatv("unknown {0} name '{1}'",
1719                   (InnerPipeline.empty() ? "pass" : "pipeline"), FirstName)
1720               .str(),
1721           inconvertibleErrorCode());
1722     }
1723   }
1724 
1725   if (auto Err = parseModulePassPipeline(MPM, *Pipeline))
1726     return Err;
1727   return Error::success();
1728 }
1729 
1730 // Primary pass pipeline description parsing routine for a \c CGSCCPassManager
1731 Error PassBuilder::parsePassPipeline(CGSCCPassManager &CGPM,
1732                                      StringRef PipelineText) {
1733   auto Pipeline = parsePipelineText(PipelineText);
1734   if (!Pipeline || Pipeline->empty())
1735     return make_error<StringError>(
1736         formatv("invalid pipeline '{0}'", PipelineText).str(),
1737         inconvertibleErrorCode());
1738 
1739   StringRef FirstName = Pipeline->front().Name;
1740   if (!isCGSCCPassName(FirstName, CGSCCPipelineParsingCallbacks))
1741     return make_error<StringError>(
1742         formatv("unknown cgscc pass '{0}' in pipeline '{1}'", FirstName,
1743                 PipelineText)
1744             .str(),
1745         inconvertibleErrorCode());
1746 
1747   if (auto Err = parseCGSCCPassPipeline(CGPM, *Pipeline))
1748     return Err;
1749   return Error::success();
1750 }
1751 
1752 // Primary pass pipeline description parsing routine for a \c
1753 // FunctionPassManager
1754 Error PassBuilder::parsePassPipeline(FunctionPassManager &FPM,
1755                                      StringRef PipelineText) {
1756   auto Pipeline = parsePipelineText(PipelineText);
1757   if (!Pipeline || Pipeline->empty())
1758     return make_error<StringError>(
1759         formatv("invalid pipeline '{0}'", PipelineText).str(),
1760         inconvertibleErrorCode());
1761 
1762   StringRef FirstName = Pipeline->front().Name;
1763   if (!isFunctionPassName(FirstName, FunctionPipelineParsingCallbacks))
1764     return make_error<StringError>(
1765         formatv("unknown function pass '{0}' in pipeline '{1}'", FirstName,
1766                 PipelineText)
1767             .str(),
1768         inconvertibleErrorCode());
1769 
1770   if (auto Err = parseFunctionPassPipeline(FPM, *Pipeline))
1771     return Err;
1772   return Error::success();
1773 }
1774 
1775 // Primary pass pipeline description parsing routine for a \c LoopPassManager
1776 Error PassBuilder::parsePassPipeline(LoopPassManager &CGPM,
1777                                      StringRef PipelineText) {
1778   auto Pipeline = parsePipelineText(PipelineText);
1779   if (!Pipeline || Pipeline->empty())
1780     return make_error<StringError>(
1781         formatv("invalid pipeline '{0}'", PipelineText).str(),
1782         inconvertibleErrorCode());
1783 
1784   if (auto Err = parseLoopPassPipeline(CGPM, *Pipeline))
1785     return Err;
1786 
1787   return Error::success();
1788 }
1789 
1790 Error PassBuilder::parseAAPipeline(AAManager &AA, StringRef PipelineText) {
1791   // If the pipeline just consists of the word 'default' just replace the AA
1792   // manager with our default one.
1793   if (PipelineText == "default") {
1794     AA = buildDefaultAAPipeline();
1795     return Error::success();
1796   }
1797 
1798   while (!PipelineText.empty()) {
1799     StringRef Name;
1800     std::tie(Name, PipelineText) = PipelineText.split(',');
1801     if (!parseAAPassName(AA, Name))
1802       return make_error<StringError>(
1803           formatv("unknown alias analysis name '{0}'", Name).str(),
1804           inconvertibleErrorCode());
1805   }
1806 
1807   return Error::success();
1808 }
1809 
1810 static void printPassName(StringRef PassName, raw_ostream &OS) {
1811   OS << "  " << PassName << "\n";
1812 }
1813 static void printPassName(StringRef PassName, StringRef Params,
1814                           raw_ostream &OS) {
1815   OS << "  " << PassName << "<" << Params << ">\n";
1816 }
1817 
1818 void PassBuilder::printPassNames(raw_ostream &OS) {
1819   // TODO: print pass descriptions when they are available
1820 
1821   OS << "Module passes:\n";
1822 #define MODULE_PASS(NAME, CREATE_PASS) printPassName(NAME, OS);
1823 #include "PassRegistry.def"
1824 
1825   OS << "Module passes with params:\n";
1826 #define MODULE_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)      \
1827   printPassName(NAME, PARAMS, OS);
1828 #include "PassRegistry.def"
1829 
1830   OS << "Module analyses:\n";
1831 #define MODULE_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
1832 #include "PassRegistry.def"
1833 
1834   OS << "Module alias analyses:\n";
1835 #define MODULE_ALIAS_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
1836 #include "PassRegistry.def"
1837 
1838   OS << "CGSCC passes:\n";
1839 #define CGSCC_PASS(NAME, CREATE_PASS) printPassName(NAME, OS);
1840 #include "PassRegistry.def"
1841 
1842   OS << "CGSCC passes with params:\n";
1843 #define CGSCC_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)       \
1844   printPassName(NAME, PARAMS, OS);
1845 #include "PassRegistry.def"
1846 
1847   OS << "CGSCC analyses:\n";
1848 #define CGSCC_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
1849 #include "PassRegistry.def"
1850 
1851   OS << "Function passes:\n";
1852 #define FUNCTION_PASS(NAME, CREATE_PASS) printPassName(NAME, OS);
1853 #include "PassRegistry.def"
1854 
1855   OS << "Function passes with params:\n";
1856 #define FUNCTION_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)    \
1857   printPassName(NAME, PARAMS, OS);
1858 #include "PassRegistry.def"
1859 
1860   OS << "Function analyses:\n";
1861 #define FUNCTION_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
1862 #include "PassRegistry.def"
1863 
1864   OS << "Function alias analyses:\n";
1865 #define FUNCTION_ALIAS_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
1866 #include "PassRegistry.def"
1867 
1868   OS << "LoopNest passes:\n";
1869 #define LOOPNEST_PASS(NAME, CREATE_PASS) printPassName(NAME, OS);
1870 #include "PassRegistry.def"
1871 
1872   OS << "Loop passes:\n";
1873 #define LOOP_PASS(NAME, CREATE_PASS) printPassName(NAME, OS);
1874 #include "PassRegistry.def"
1875 
1876   OS << "Loop passes with params:\n";
1877 #define LOOP_PASS_WITH_PARAMS(NAME, CLASS, CREATE_PASS, PARSER, PARAMS)        \
1878   printPassName(NAME, PARAMS, OS);
1879 #include "PassRegistry.def"
1880 
1881   OS << "Loop analyses:\n";
1882 #define LOOP_ANALYSIS(NAME, CREATE_PASS) printPassName(NAME, OS);
1883 #include "PassRegistry.def"
1884 }
1885 
1886 void PassBuilder::registerParseTopLevelPipelineCallback(
1887     const std::function<bool(ModulePassManager &, ArrayRef<PipelineElement>)>
1888         &C) {
1889   TopLevelPipelineParsingCallbacks.push_back(C);
1890 }
1891