[PM] pass -debug-pass-manager flag into FunctionToLoopPassAdaptor's canonicalization PM

[fedor.sergeev]

Summary

New pass manager driver passes DebugPM (-debug-pass-manager) flag into
individual PassManager constructors in order to enable debug logging.
FunctionToLoopPassAdaptor has its own internal LoopCanonicalizationPM
which never gets its debug logging enabled and that means canonicalization
passes like LoopSimplify are never present in -debug-pass-manager output.

Extending FunctionToLoopPassAdaptor's constructor and
createFunctionToLoopPassAdaptor wrapper with an optional
boolean DebugLogging argument.

Passing debug-logging flags there as appropriate.

[fedor.sergeev]

clang-formatting

[davide]

LGTM

include/llvm/Transforms/Scalar/LoopPassManager.h

 /// FunctionPassManager. Note that if this pass is constructed with a \c
 /// FunctionAnalysisManager it will run the \c LoopAnalysisManagerFunctionProxy
 /// analysis prior to running the loop passes over the function to enable a \c
 /// LoopAnalysisManager to be used within this run safely.
 template <typename LoopPassT>
 class FunctionToLoopPassAdaptor
     : public PassInfoMixin<FunctionToLoopPassAdaptor<LoopPassT>> {
 public:
-  explicit FunctionToLoopPassAdaptor(LoopPassT Pass) : Pass(std::move(Pass)) {
+  explicit FunctionToLoopPassAdaptor(LoopPassT Pass, bool DebugLogging = false)
+      : Pass(std::move(Pass)), LoopCanonicalizationFPM(DebugLogging) {
     LoopCanonicalizationFPM.addPass(LoopSimplifyPass());
     LoopCanonicalizationFPM.addPass(LCSSAPass());
   }
 
   /// \brief Runs the loop passes across every loop in the function.
   PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM) {
     // Before we even compute any loop analyses, first run a miniature function
     // pass pipeline to put loops into their canonical form. Note that we can
private:
 
   FunctionPassManager LoopCanonicalizationFPM;
 };
 
 /// \brief A function to deduce a loop pass type and wrap it in the templated
 /// adaptor.
 template <typename LoopPassT>
 FunctionToLoopPassAdaptor<LoopPassT>
-createFunctionToLoopPassAdaptor(LoopPassT Pass) {
-  return FunctionToLoopPassAdaptor<LoopPassT>(std::move(Pass));
+createFunctionToLoopPassAdaptor(LoopPassT Pass, bool DebugLogging = false) {
+  return FunctionToLoopPassAdaptor<LoopPassT>(std::move(Pass), DebugLogging);
 }
 
 /// \brief Pass for printing a loop's contents as textual IR.
 class PrintLoopPass : public PassInfoMixin<PrintLoopPass> {
   raw_ostream &OS;
   std::string Banner;
 
 public:

lib/Passes/PassBuilder.cpp

if (Phase != ThinLTOPhase::PreLink ||
     LPM2.addPass(LoopFullUnrollPass(Level));
 
   for (auto &C : LoopOptimizerEndEPCallbacks)
     C(LPM2, Level);
 
   // We provide the opt remark emitter pass for LICM to use. We only need to do
   // this once as it is immutable.
   FPM.addPass(RequireAnalysisPass<OptimizationRemarkEmitterAnalysis, Function>());
-  FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM1)));
+  FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM1), DebugLogging));
   FPM.addPass(SimplifyCFGPass());
   FPM.addPass(InstCombinePass());
-  FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM2)));
+  FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM2), DebugLogging));
 
   // Eliminate redundancies.
   if (Level != O1) {
     // These passes add substantial compile time so skip them at O1.
     FPM.addPass(MergedLoadStoreMotionPass());
     if (RunNewGVN)
       FPM.addPass(NewGVNPass());
     else
PassBuilder::buildFunctionSimplificationPipeline(OptimizationLevel Level,
   FPM.addPass(InstCombinePass());
   invokePeepholeEPCallbacks(FPM, Level);
 
   // Re-consider control flow based optimizations after redundancy elimination,
   // redo DCE, etc.
   FPM.addPass(JumpThreadingPass());
   FPM.addPass(CorrelatedValuePropagationPass());
   FPM.addPass(DSEPass());
-  FPM.addPass(createFunctionToLoopPassAdaptor(LICMPass()));
+  FPM.addPass(createFunctionToLoopPassAdaptor(LICMPass(), DebugLogging));
 
   for (auto &C : ScalarOptimizerLateEPCallbacks)
     C(FPM, Level);
 
   // Finally, do an expensive DCE pass to catch all the dead code exposed by
   // the simplifications and basic cleanup after all the simplifications.
   FPM.addPass(ADCEPass());
   FPM.addPass(SimplifyCFGPass());
void PassBuilder::addPGOInstrPasses(ModulePassManager &MPM, bool DebugLogging,
   // dead code. Instrumentation can end up keeping dead code around and
   // dramatically increase code size.
   MPM.addPass(GlobalDCEPass());
 
   if (RunProfileGen) {
     MPM.addPass(PGOInstrumentationGen());
 
     FunctionPassManager FPM;
-    FPM.addPass(createFunctionToLoopPassAdaptor(LoopRotatePass()));
+    FPM.addPass(
+        createFunctionToLoopPassAdaptor(LoopRotatePass(), DebugLogging));
     MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
 
     // Add the profile lowering pass.
     InstrProfOptions Options;
     if (!ProfileGenFile.empty())
       Options.InstrProfileOutput = ProfileGenFile;
     Options.DoCounterPromotion = true;
     MPM.addPass(InstrProfiling(Options));
PassBuilder::buildModuleOptimizationPipeline(OptimizationLevel Level,
   // Optimize the loop execution. These passes operate on entire loop nests
   // rather than on each loop in an inside-out manner, and so they are actually
   // function passes.
 
   for (auto &C : VectorizerStartEPCallbacks)
     C(OptimizePM, Level);
 
   // First rotate loops that may have been un-rotated by prior passes.
-  OptimizePM.addPass(createFunctionToLoopPassAdaptor(LoopRotatePass()));
+  OptimizePM.addPass(
+      createFunctionToLoopPassAdaptor(LoopRotatePass(), DebugLogging));
 
   // Distribute loops to allow partial vectorization.  I.e. isolate dependences
   // into separate loop that would otherwise inhibit vectorization.  This is
   // currently only performed for loops marked with the metadata
   // llvm.loop.distribute=true or when -enable-loop-distribute is specified.
   OptimizePM.addPass(LoopDistributePass());
 
   // Now run the core loop vectorizer.
PassBuilder::buildModuleOptimizationPipeline(OptimizationLevel Level,
   // execution resources of an out-of-order processor. We also then need to
   // clean up redundancies and loop invariant code.
   // FIXME: It would be really good to use a loop-integrated instruction
   // combiner for cleanup here so that the unrolling and LICM can be pipelined
   // across the loop nests.
   OptimizePM.addPass(LoopUnrollPass(Level));
   OptimizePM.addPass(InstCombinePass());
   OptimizePM.addPass(RequireAnalysisPass<OptimizationRemarkEmitterAnalysis, Function>());
-  OptimizePM.addPass(createFunctionToLoopPassAdaptor(LICMPass()));
+  OptimizePM.addPass(createFunctionToLoopPassAdaptor(LICMPass(), DebugLogging));
 
   // Now that we've vectorized and unrolled loops, we may have more refined
   // alignment information, try to re-derive it here.
   OptimizePM.addPass(AlignmentFromAssumptionsPass());
 
   // LoopSink pass sinks instructions hoisted by LICM, which serves as a
   // canonicalization pass that enables other optimizations. As a result,
   // LoopSink pass needs to be a very late IR pass to avoid undoing LICM
if (Name == "function") {
       return true;
     }
     if (Name == "loop") {
       LoopPassManager LPM(DebugLogging);
       if (!parseLoopPassPipeline(LPM, InnerPipeline, VerifyEachPass,
                                  DebugLogging))
         return false;
       // Add the nested pass manager with the appropriate adaptor.
-      FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM)));
+      FPM.addPass(
+          createFunctionToLoopPassAdaptor(std::move(LPM), DebugLogging));
       return true;
     }
     if (auto Count = parseRepeatPassName(Name)) {
       FunctionPassManager NestedFPM(DebugLogging);
       if (!parseFunctionPassPipeline(NestedFPM, InnerPipeline, VerifyEachPass,
                                      DebugLogging))
         return false;
       FPM.addPass(createRepeatedPass(*Count, std::move(NestedFPM)));

test/Other/loop-pm-invalidation.ll

 ;
 ; Also provide a test that can delete loops after populating analyses for them.
 ; RUN: opt -disable-output -disable-verify -debug-pass-manager %s 2>&1 \
 ; RUN:     -passes='loop(no-op-loop,loop-deletion),invalidate<scalar-evolution>,loop(no-op-loop)' \
 ; RUN:     | FileCheck %s --check-prefix=CHECK-SCEV-INV-AFTER-DELETE
 
 define void @no_loops() {
 ; CHECK-LOOP-INV-LABEL: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on no_loops
+; CHECK-LOOP-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-LOOP-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-LOOP-INV-NEXT: Running analysis: LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: DominatorTreeAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: AssumptionAnalysis
+; CHECK-LOOP-INV-NEXT: Running pass: LCSSAPass
+; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-LOOP-INV-NEXT: Running pass: InvalidateAnalysisPass<{{.*}}LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Invalidating all non-preserved analyses
 ; CHECK-LOOP-INV-NEXT: Invalidating analysis: LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on no_loops
+; CHECK-LOOP-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-LOOP-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-LOOP-INV-NEXT: Running analysis: LoopAnalysis
+; CHECK-LOOP-INV-NEXT: Running pass: LCSSAPass
+; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run.
 ;
 ; CHECK-SCEV-INV-LABEL: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on no_loops
+; CHECK-SCEV-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-SCEV-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-SCEV-INV-NEXT: Running analysis: LoopAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: DominatorTreeAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: AssumptionAnalysis
+; CHECK-SCEV-INV-NEXT: Running pass: LCSSAPass
+; CHECK-SCEV-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-SCEV-INV-NEXT: Running pass: InvalidateAnalysisPass<{{.*}}ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Invalidating all non-preserved analyses
 ; CHECK-SCEV-INV-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on no_loops
+; CHECK-SCEV-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-SCEV-INV-NEXT: Running pass: LoopSimplifyPass
+; CHECK-SCEV-INV-NEXT: Running pass: LCSSAPass
+; CHECK-SCEV-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-SCEV-INV-NEXT: Finished {{.*}}Function pass manager run.
 
 entry:
   ret void
 }
 
 define void @one_loop(i1* %ptr) {
 ; CHECK-LOOP-INV-LABEL: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on one_loop
+; CHECK-LOOP-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-LOOP-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-LOOP-INV-NEXT: Running analysis: LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: DominatorTreeAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: AssumptionAnalysis
+; CHECK-LOOP-INV-NEXT: Running pass: LCSSAPass
+; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-LOOP-INV-NEXT: Running analysis: AAManager
 ; CHECK-LOOP-INV-NEXT: Running analysis: TargetLibraryAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: TargetIRAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-LOOP-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-LOOP-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Running pass: InvalidateAnalysisPass<{{.*}}LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Invalidating all non-preserved analyses
 ; CHECK-LOOP-INV-NEXT: Clearing all analysis results for: <possibly invalidated loop>
 ; CHECK-LOOP-INV-NEXT: Invalidating analysis: LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Invalidating analysis: ScalarEvolutionAnalysis
 ; CHECK-LOOP-INV-NEXT: Invalidating analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-LOOP-INV-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on one_loop
+; CHECK-LOOP-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-LOOP-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-LOOP-INV-NEXT: Running analysis: LoopAnalysis
+; CHECK-LOOP-INV-NEXT: Running pass: LCSSAPass
+; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-LOOP-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-LOOP-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-LOOP-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run.
 ;
 ; CHECK-SCEV-INV-LABEL: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on one_loop
+; CHECK-SCEV-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-SCEV-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-SCEV-INV-NEXT: Running analysis: LoopAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: DominatorTreeAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: AssumptionAnalysis
+; CHECK-SCEV-INV-NEXT: Running pass: LCSSAPass
+; CHECK-SCEV-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-SCEV-INV-NEXT: Running analysis: AAManager
 ; CHECK-SCEV-INV-NEXT: Running analysis: TargetLibraryAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: TargetIRAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-SCEV-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-SCEV-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Running pass: InvalidateAnalysisPass<{{.*}}ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Invalidating all non-preserved analyses
 ; CHECK-SCEV-INV-NEXT: Clearing all analysis results for: <possibly invalidated loop>
 ; CHECK-SCEV-INV-NEXT: Invalidating analysis: ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Invalidating analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-SCEV-INV-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on one_loop
+; CHECK-SCEV-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-SCEV-INV-NEXT: Running pass: LoopSimplifyPass
+; CHECK-SCEV-INV-NEXT: Running pass: LCSSAPass
+; CHECK-SCEV-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-SCEV-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-SCEV-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-SCEV-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Finished {{.*}}Function pass manager run.
 
 entry:
   br label %l0.header
 
 l0.header:
   %flag0 = load volatile i1, i1* %ptr
   br i1 %flag0, label %l0.header, label %exit
 
 exit:
   ret void
 }
 
 define void @nested_loops(i1* %ptr) {
 ; CHECK-LOOP-INV-LABEL: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on nested_loops
+; CHECK-LOOP-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-LOOP-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-LOOP-INV-NEXT: Running analysis: LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: DominatorTreeAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: AssumptionAnalysis
+; CHECK-LOOP-INV-NEXT: Running pass: LCSSAPass
+; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-LOOP-INV-NEXT: Running analysis: AAManager
 ; CHECK-LOOP-INV-NEXT: Running analysis: TargetLibraryAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: TargetIRAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-LOOP-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-LOOP-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-LOOP-INV: Finished {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Running pass: InvalidateAnalysisPass<{{.*}}LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Invalidating all non-preserved analyses
 ; CHECK-LOOP-INV-NEXT: Clearing all analysis results for: <possibly invalidated loop>
 ; CHECK-LOOP-INV-NEXT: Clearing all analysis results for: <possibly invalidated loop>
 ; CHECK-LOOP-INV-NEXT: Invalidating analysis: LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Invalidating analysis: ScalarEvolutionAnalysis
 ; CHECK-LOOP-INV-NEXT: Invalidating analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-LOOP-INV-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on nested_loops
+; CHECK-LOOP-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-LOOP-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-LOOP-INV-NEXT: Running analysis: LoopAnalysis
+; CHECK-LOOP-INV-NEXT: Running pass: LCSSAPass
+; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-LOOP-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-LOOP-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-LOOP-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-LOOP-INV: Finished {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run.
 ;
 ; CHECK-SCEV-INV-LABEL: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on nested_loops
+; CHECK-SCEV-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-SCEV-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-SCEV-INV-NEXT: Running analysis: LoopAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: DominatorTreeAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: AssumptionAnalysis
+; CHECK-SCEV-INV-NEXT: Running pass: LCSSAPass
+; CHECK-SCEV-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-SCEV-INV-NEXT: Running analysis: AAManager
 ; CHECK-SCEV-INV-NEXT: Running analysis: TargetLibraryAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: TargetIRAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-SCEV-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-SCEV-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-SCEV-INV: Finished {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Running pass: InvalidateAnalysisPass<{{.*}}ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Invalidating all non-preserved analyses
 ; CHECK-SCEV-INV-NEXT: Clearing all analysis results for: <possibly invalidated loop>
 ; CHECK-SCEV-INV-NEXT: Clearing all analysis results for: <possibly invalidated loop>
 ; CHECK-SCEV-INV-NEXT: Invalidating analysis: ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Invalidating analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-SCEV-INV-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on nested_loops
+; CHECK-SCEV-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-SCEV-INV-NEXT: Running pass: LoopSimplifyPass
+; CHECK-SCEV-INV-NEXT: Running pass: LCSSAPass
+; CHECK-SCEV-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-SCEV-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-SCEV-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-SCEV-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-SCEV-INV: Finished {{.*}}Loop pass manager run.
l.0.latch:
   br i1 %flag.0, label %l.0.header, label %exit
 
 exit:
   ret void
 }
 
 define void @dead_loop() {
 ; CHECK-LOOP-INV-LABEL: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on dead_loop
+; CHECK-LOOP-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-LOOP-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-LOOP-INV-NEXT: Running analysis: LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: DominatorTreeAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: AssumptionAnalysis
+; CHECK-LOOP-INV-NEXT: Running pass: LCSSAPass
+; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-LOOP-INV-NEXT: Running analysis: AAManager
 ; CHECK-LOOP-INV-NEXT: Running analysis: TargetLibraryAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: TargetIRAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-LOOP-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-LOOP-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Running pass: InvalidateAnalysisPass<{{.*}}LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Invalidating all non-preserved analyses
 ; CHECK-LOOP-INV-NEXT: Clearing all analysis results for: <possibly invalidated loop>
 ; CHECK-LOOP-INV-NEXT: Invalidating analysis: LoopAnalysis
 ; CHECK-LOOP-INV-NEXT: Invalidating analysis: ScalarEvolutionAnalysis
 ; CHECK-LOOP-INV-NEXT: Invalidating analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-LOOP-INV-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on dead_loop
+; CHECK-LOOP-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-LOOP-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-LOOP-INV-NEXT: Running analysis: LoopAnalysis
+; CHECK-LOOP-INV-NEXT: Running pass: LCSSAPass
+; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-LOOP-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-LOOP-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-LOOP-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-LOOP-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-LOOP-INV-NEXT: Finished {{.*}}Function pass manager run.
 ;
 ; CHECK-SCEV-INV-LABEL: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on dead_loop
+; CHECK-SCEV-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-SCEV-INV-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-SCEV-INV-NEXT: Running analysis: LoopAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: DominatorTreeAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: AssumptionAnalysis
+; CHECK-SCEV-INV-NEXT: Running pass: LCSSAPass
+; CHECK-SCEV-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-SCEV-INV-NEXT: Running analysis: AAManager
 ; CHECK-SCEV-INV-NEXT: Running analysis: TargetLibraryAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: TargetIRAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-SCEV-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-SCEV-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Running pass: InvalidateAnalysisPass<{{.*}}ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Invalidating all non-preserved analyses
 ; CHECK-SCEV-INV-NEXT: Clearing all analysis results for: <possibly invalidated loop>
 ; CHECK-SCEV-INV-NEXT: Invalidating analysis: ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Invalidating analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-SCEV-INV-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on dead_loop
+; CHECK-SCEV-INV-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-SCEV-INV-NEXT: Running pass: LoopSimplifyPass
+; CHECK-SCEV-INV-NEXT: Running pass: LCSSAPass
+; CHECK-SCEV-INV-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-SCEV-INV-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-SCEV-INV-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Running pass: NoOpLoopPass
 ; CHECK-SCEV-INV-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-NEXT: Finished {{.*}}Function pass manager run.
 ;
 ; CHECK-SCEV-INV-AFTER-DELETE-LABEL: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on dead_loop
+; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running analysis: LoopAnalysis
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running analysis: DominatorTreeAnalysis
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running analysis: AssumptionAnalysis
+; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running pass: LCSSAPass
+; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running analysis: AAManager
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running analysis: TargetLibraryAnalysis
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running analysis: TargetIRAnalysis
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Starting {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running pass: NoOpLoopPass
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running pass: LoopDeletionPass
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Clearing all analysis results for:
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Finished {{.*}}Loop pass manager run.
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Invalidating all non-preserved analyses
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running pass: InvalidateAnalysisPass<{{.*}}ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Invalidating all non-preserved analyses
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Invalidating analysis: ScalarEvolutionAnalysis
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Invalidating analysis: InnerAnalysisManagerProxy<{{.*}}Loop
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}> on dead_loop
+; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Starting {{.*}}Function pass manager run
+; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running pass: LoopSimplifyPass
+; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Running pass: LCSSAPass
+; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Finished {{.*}}Function pass manager run
 ; CHECK-SCEV-INV-AFTER-DELETE-NEXT: Finished {{.*}}Function pass manager run.
 
 entry:
   br label %l0.header
 
 l0.header:
   br i1 false, label %l0.header, label %exit
 
 exit:
   ret void
 }

test/Other/new-pass-manager.ll

 ; RUN: opt -disable-output -disable-verify -debug-pass-manager \
 ; RUN:     -passes='loop(repeat<3>(no-op-loop))' %s 2>&1 \
 ; RUN:     | FileCheck %s --check-prefix=CHECK-REPEAT-LOOP-PASS
 ; CHECK-REPEAT-LOOP-PASS: Starting llvm::Module pass manager run
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running pass: ModuleToFunctionPassAdaptor
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}>
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Starting llvm::Function pass manager run
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running pass: FunctionToLoopPassAdaptor
+; CHECK-REPEAT-LOOP-PASS-NEXT: Starting llvm::Function pass manager run
+; CHECK-REPEAT-LOOP-PASS-NEXT: Running pass: LoopSimplify
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running analysis: LoopAnalysis
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running analysis: DominatorTreeAnalysis
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running analysis: AssumptionAnalysis
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Invalidating all non-preserved analyses
+; CHECK-REPEAT-LOOP-PASS-NEXT: Running pass: LCSSAPass
+; CHECK-REPEAT-LOOP-PASS-NEXT: Finished llvm::Function pass manager run
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running analysis: AAManager
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running analysis: TargetLibraryAnalysis
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running analysis: TargetIRAnalysis
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running analysis: InnerAnalysisManagerProxy<{{.*}}>
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Starting Loop pass manager run
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Running pass: RepeatedPass
 ; CHECK-REPEAT-LOOP-PASS-NEXT: Starting Loop pass manager run

test/Other/new-pm-defaults.ll

 ; CHECK-O2-NEXT: Running pass: LibCallsShrinkWrapPass
 ; CHECK-O3-NEXT: Running pass: LibCallsShrinkWrapPass
 ; CHECK-EP-PEEPHOLE-NEXT: Running pass: NoOpFunctionPass
 ; CHECK-O-NEXT: Running pass: TailCallElimPass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: ReassociatePass
 ; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}OptimizationRemarkEmitterAnalysis
 ; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LoopStandardAnalysisResults{{.*}}>
+; CHECK-O-NEXT: Starting llvm::Function pass manager run.
+; CHECK-O-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-O-NEXT: Running analysis: LoopAnalysis
+; CHECK-O-NEXT: Running pass: LCSSAPass
+; CHECK-O-NEXT: Finished llvm::Function pass manager run.
 ; CHECK-O-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-O-NEXT: Running analysis: InnerAnalysisManagerProxy
 ; CHECK-O-NEXT: Starting Loop pass manager run.
 ; CHECK-O-NEXT: Running pass: LoopRotatePass
 ; CHECK-O-NEXT: Running pass: LICM
 ; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
 ; CHECK-O-NEXT: Running pass: SimpleLoopUnswitchPass
 ; CHECK-O-NEXT: Finished Loop pass manager run.
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LoopStandardAnalysisResults{{.*}}>
+; CHECK-O-NEXT: Starting llvm::Function pass manager run.
+; CHECK-O-NEXT: Running pass: LoopSimplifyPass
+; CHECK-O-NEXT: Running pass: LCSSAPass
+; CHECK-O-NEXT: Finished llvm::Function pass manager run.
 ; CHECK-O-NEXT: Starting Loop pass manager run.
 ; CHECK-O-NEXT: Running pass: IndVarSimplifyPass
 ; CHECK-O-NEXT: Running pass: LoopIdiomRecognizePass
 ; CHECK-EP-LOOP-LATE-NEXT: Running pass: NoOpLoopPass
 ; CHECK-O-NEXT: Running pass: LoopDeletionPass
 ; CHECK-O-NEXT: Running pass: LoopFullUnrollPass
 ; CHECK-EP-LOOP-END-NEXT: Running pass: NoOpLoopPass
 ; CHECK-O-NEXT: Finished Loop pass manager run.

 ; CHECK-O-NEXT: Running pass: BDCEPass
 ; CHECK-O-NEXT: Running analysis: DemandedBitsAnalysis
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-EP-PEEPHOLE-NEXT: Running pass: NoOpFunctionPass
 ; CHECK-O-NEXT: Running pass: JumpThreadingPass
 ; CHECK-O-NEXT: Running pass: CorrelatedValuePropagationPass
 ; CHECK-O-NEXT: Running pass: DSEPass
 ; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LICMPass{{.*}}>
+; CHECK-O-NEXT: Starting llvm::Function pass manager run.
+; CHECK-O-NEXT: Running pass: LoopSimplifyPass
+; CHECK-O-NEXT: Running pass: LCSSAPass
+; CHECK-O-NEXT: Finished llvm::Function pass manager run.
 ; CHECK-EP-SCALAR-LATE-NEXT: Running pass: NoOpFunctionPass
 ; CHECK-O-NEXT: Running pass: ADCEPass
 ; CHECK-O-NEXT: Running analysis: PostDominatorTreeAnalysis
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-EP-PEEPHOLE-NEXT: Running pass: NoOpFunctionPass
 ; CHECK-O-NEXT: Finished llvm::Function pass manager run.
 ; CHECK-EP-CGSCC-LATE-NEXT: Running pass: NoOpCGSCCPass
 ; CHECK-O-NEXT: Finished CGSCC pass manager run.
 ; CHECK-O-NEXT: Finished llvm::Module pass manager run.
 ; CHECK-O-NEXT: Running pass: PassManager<{{.*}}Module{{.*}}>
 ; CHECK-O-NEXT: Starting llvm::Module pass manager run.
 ; CHECK-O-NEXT: Running pass: GlobalOptPass
 ; CHECK-O-NEXT: Running pass: GlobalDCEPass
 ; CHECK-O-NEXT: Running pass: EliminateAvailableExternallyPass
 ; CHECK-O-NEXT: Running pass: ReversePostOrderFunctionAttrsPass
 ; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}GlobalsAA
 ; CHECK-O-NEXT: Running pass: ModuleToFunctionPassAdaptor<{{.*}}PassManager{{.*}}>
 ; CHECK-O-NEXT: Starting llvm::Function pass manager run.
 ; CHECK-O-NEXT: Running pass: Float2IntPass
 ; CHECK-EP-VECTORIZER-START-NEXT: Running pass: NoOpFunctionPass
 ; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LoopRotatePass
+; CHECK-O-NEXT: Starting llvm::Function pass manager run.
+; CHECK-O-NEXT: Running pass: LoopSimplifyPass
+; CHECK-O-NEXT: Running pass: LCSSAPass
+; CHECK-O-NEXT: Finished llvm::Function pass manager run.
 ; CHECK-O-NEXT: Running pass: LoopDistributePass
 ; CHECK-O-NEXT: Running pass: LoopVectorizePass
 ; CHECK-O-NEXT: Running analysis: BlockFrequencyAnalysis
 ; CHECK-O-NEXT: Running analysis: BranchProbabilityAnalysis
 ; CHECK-O-NEXT: Running pass: LoopLoadEliminationPass
 ; CHECK-O-NEXT: Running analysis: LoopAccessAnalysis
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: SLPVectorizerPass
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O-NEXT: Running pass: LoopUnrollPass
 ; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}OptimizationRemarkEmitterAnalysis
 ; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LICMPass
+; CHECK-O-NEXT: Starting llvm::Function pass manager run.
+; CHECK-O-NEXT: Running pass: LoopSimplifyPass
+; CHECK-O-NEXT: Running pass: LCSSAPass
+; CHECK-O-NEXT: Finished llvm::Function pass manager run.
 ; CHECK-O-NEXT: Running pass: AlignmentFromAssumptionsPass
 ; CHECK-O-NEXT: Running pass: LoopSinkPass
 ; CHECK-O-NEXT: Running pass: InstSimplifierPass
 ; CHECK-O-NEXT: Running pass: DivRemPairsPass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: SpeculateAroundPHIsPass
 ; CHECK-O-NEXT: Finished llvm::Function pass manager run.
 ; CHECK-O-NEXT: Running pass: GlobalDCEPass

test/Other/new-pm-thinlto-defaults.ll

 ; CHECK-O1-NEXT: Running pass: LibCallsShrinkWrapPass
 ; CHECK-O2-NEXT: Running pass: LibCallsShrinkWrapPass
 ; CHECK-O3-NEXT: Running pass: LibCallsShrinkWrapPass
 ; CHECK-O-NEXT: Running pass: TailCallElimPass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: ReassociatePass
 ; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}OptimizationRemarkEmitterAnalysis
 ; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LoopStandardAnalysisResults{{.*}}>
+; CHECK-O-NEXT: Starting llvm::Function pass manager run
+; CHECK-O-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-O-NEXT: Running analysis: LoopAnalysis
+; CHECK-O-NEXT: Running pass: LCSSAPass
+; CHECK-O-NEXT: Finished llvm::Function pass manager run
 ; CHECK-O-NEXT: Running analysis: ScalarEvolutionAnalysis
 ; CHECK-O-NEXT: Running analysis: InnerAnalysisManagerProxy
 ; CHECK-O-NEXT: Starting Loop pass manager run.
 ; CHECK-O-NEXT: Running pass: LoopRotatePass
 ; CHECK-O-NEXT: Running pass: LICM
 ; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
 ; CHECK-O-NEXT: Running pass: SimpleLoopUnswitchPass
 ; CHECK-O-NEXT: Finished Loop pass manager run.
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LoopStandardAnalysisResults{{.*}}>
+; CHECK-O-NEXT: Starting llvm::Function pass manager run
+; CHECK-O-NEXT: Running pass: LoopSimplifyPass
+; CHECK-O-NEXT: Running pass: LCSSAPass
+; CHECK-O-NEXT: Finished llvm::Function pass manager run
 ; CHECK-O-NEXT: Starting Loop pass manager run.
 ; CHECK-O-NEXT: Running pass: IndVarSimplifyPass
 ; CHECK-O-NEXT: Running pass: LoopIdiomRecognizePass
 ; CHECK-O-NEXT: Running pass: LoopDeletionPass
 ; CHECK-O-NEXT: Running pass: LoopFullUnrollPass
 ; CHECK-O-NEXT: Finished Loop pass manager run.
 ; CHECK-Os-NEXT: Running pass: MergedLoadStoreMotionPass
 ; CHECK-Os-NEXT: Running pass: GVN

 ; CHECK-O-NEXT: Running pass: SCCPPass
 ; CHECK-O-NEXT: Running pass: BDCEPass
 ; CHECK-O-NEXT: Running analysis: DemandedBitsAnalysis
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O-NEXT: Running pass: JumpThreadingPass
 ; CHECK-O-NEXT: Running pass: CorrelatedValuePropagationPass
 ; CHECK-O-NEXT: Running pass: DSEPass
 ; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LICMPass{{.*}}>
+; CHECK-O-NEXT: Starting llvm::Function pass manager run
+; CHECK-O-NEXT: Running pass: LoopSimplifyPass
+; CHECK-O-NEXT: Running pass: LCSSAPass
+; CHECK-O-NEXT: Finished llvm::Function pass manager run
 ; CHECK-O-NEXT: Running pass: ADCEPass
 ; CHECK-O-NEXT: Running analysis: PostDominatorTreeAnalysis
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O-NEXT: Finished llvm::Function pass manager run.
 ; CHECK-O-NEXT: Finished CGSCC pass manager run.
 ; CHECK-O-NEXT: Finished llvm::Module pass manager run.
 ; CHECK-PRELINK-O-NEXT: Running pass: GlobalOptPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: PassManager<{{.*}}Module{{.*}}>
 ; CHECK-POSTLINK-O-NEXT: Starting llvm::Module pass manager run.
 ; CHECK-POSTLINK-O-NEXT: Running pass: GlobalOptPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: GlobalDCEPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: EliminateAvailableExternallyPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: ReversePostOrderFunctionAttrsPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}GlobalsAA
 ; CHECK-POSTLINK-O-NEXT: Running pass: ModuleToFunctionPassAdaptor<{{.*}}PassManager{{.*}}>
 ; CHECK-POSTLINK-O-NEXT: Starting llvm::Function pass manager run.
 ; CHECK-POSTLINK-O-NEXT: Running pass: Float2IntPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LoopRotatePass
+; CHECK-POSTLINK-O-NEXT: Starting llvm::Function pass manager run
+; CHECK-POSTLINK-O-NEXT: Running pass: LoopSimplifyPass
+; CHECK-POSTLINK-O-NEXT: Running pass: LCSSAPass
+; CHECK-POSTLINK-O-NEXT: Finished llvm::Function pass manager run
 ; CHECK-POSTLINK-O-NEXT: Running pass: LoopDistributePass
 ; CHECK-POSTLINK-O-NEXT: Running pass: LoopVectorizePass
 ; CHECK-POSTLINK-O-NEXT: Running analysis: BlockFrequencyAnalysis
 ; CHECK-POSTLINK-O-NEXT: Running analysis: BranchProbabilityAnalysis
 ; CHECK-POSTLINK-O-NEXT: Running pass: LoopLoadEliminationPass
 ; CHECK-POSTLINK-O-NEXT: Running analysis: LoopAccessAnalysis
 ; CHECK-POSTLINK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-POSTLINK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: SLPVectorizerPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-POSTLINK-O-NEXT: Running pass: LoopUnrollPass
 ; CHECK-POSTLINK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
 ; CHECK-POSTLINK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-POSTLINK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}OptimizationRemarkEmitterAnalysis
 ; CHECK-POSTLINK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LICMPass
+; CHECK-POSTLINK-O-NEXT: Starting llvm::Function pass manager run
+; CHECK-POSTLINK-O-NEXT: Running pass: LoopSimplifyPass
+; CHECK-POSTLINK-O-NEXT: Running pass: LCSSAPass
+; CHECK-POSTLINK-O-NEXT: Finished llvm::Function pass manager run
 ; CHECK-POSTLINK-O-NEXT: Running pass: AlignmentFromAssumptionsPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: LoopSinkPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: InstSimplifierPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: DivRemPairsPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: SpeculateAroundPHIsPass
 ; CHECK-POSTLINK-O-NEXT: Finished llvm::Function pass manager run.
 ; CHECK-POSTLINK-O-NEXT: Running pass: GlobalDCEPass

test/Transforms/LoopRotate/pr35210.ll

 ;RUN: opt %s -passes='adce,loop(rotate),adce' -S -debug-pass-manager -debug-only=loop-rotate 2>&1 | FileCheck %s
 ;REQUIRES: asserts
 
 ; This test is to make sure we invalidate the post dominator pass after loop rotate simplifies the loop latch.
 ; The adce passes are here to make sure post dominator analysis is required.
 
 ; CHECK: Starting llvm::Function pass manager run.
 ; CHECK-NEXT: Running pass: ADCEPass on f
 ; CHECK-NEXT: Running analysis: DominatorTreeAnalysis on f
 ; CHECK-NEXT: Running analysis: PostDominatorTreeAnalysis on f
 ; CHECK-NEXT: Running pass: FunctionToLoopPassAdaptor{{.*}} on f
+; CHECK-NEXT: Starting llvm::Function pass manager run.
+; CHECK-NEXT: Running pass: LoopSimplifyPass on f
 ; CHECK-NEXT: Running analysis: LoopAnalysis on f
 ; CHECK-NEXT: Running analysis: AssumptionAnalysis on f
+; CHECK-NEXT: Running pass: LCSSAPass on f
+; CHECK-NEXT: Finished llvm::Function pass manager run.
 ; CHECK-NEXT: Running analysis: AAManager on f
 ; CHECK-NEXT: Running analysis: TargetLibraryAnalysis on f
 ; CHECK-NEXT: Running analysis: ScalarEvolutionAnalysis on f
 ; CHECK-NEXT: Running analysis: TargetIRAnalysis on f
 ; CHECK-NEXT: Running analysis: InnerAnalysisManagerProxy{{.*}} on f
 ; CHECK-NEXT: Starting Loop pass manager run.
 ; CHECK-NEXT: Running pass: LoopRotatePass on Loop at depth 1 containing: %bb<header><exiting>,%bb4<latch>
 ; CHECK-NEXT: Folding loop latch bb4 into bb