[Pipelines] Hoist CoroCleanup to avoid blocking optimizations

[ChuanqiXu]

Summary

CoroCleanup is designed to lowering all the remaining coroutine intrinsics. It is required to run after CoroSplit only. However, the position of CoroCleanup now is far too late. The downside here is that the unlowered coroutine instrincs might blocking other optimizations too. So it should be a pure win to hoist the position of CoroCleanup.

[aeubanks]

would it make sense to put all of the coroutine lower passes right at the beginning of the pipeline? e.g. around LowerExpectIntrinsicPass? is there a reason CoroSplit is interleaved in the CGSCC pass manager?

[aeubanks]

In D124360#3472326, @aeubanks wrote:

would it make sense to put all of the coroutine lower passes right at the beginning of the pipeline? e.g. around LowerExpectIntrinsicPass? is there a reason CoroSplit is interleaved in the CGSCC pass manager?

(actually let's move discussion into D124364 where there are more people)

[ChuanqiXu]

@aeubanks Would you like to review this one? Although we're discussing the solution in https://discourse.llvm.org/t/address-thread-identification-problems-with-coroutine/62015, I think the change in this revision should be a pure win.

llvm/lib/Passes/PassBuilderPipelines.cpp

PassBuilder::buildModuleSimplificationPipeline(OptimizationLevel Level,
   if (EnableSyntheticCounts && !PGOOpt)
     MPM.addPass(SyntheticCountsPropagation());
 
   if (EnableModuleInliner)
     MPM.addPass(buildModuleInlinerPipeline(Level, Phase));
   else
     MPM.addPass(buildInlinerPipeline(Level, Phase));
 
+  MPM.addPass(createModuleToFunctionPassAdaptor(CoroCleanupPass()));
+
   if (EnableMemProfiler && Phase != ThinOrFullLTOPhase::ThinLTOPreLink) {
     MPM.addPass(createModuleToFunctionPassAdaptor(MemProfilerPass()));
     MPM.addPass(ModuleMemProfilerPass());
   }
 
   return MPM;
 }
 
PassBuilder::buildModuleOptimizationPipeline(OptimizationLevel Level,
   // flattening of blocks.
   OptimizePM.addPass(DivRemPairsPass());
 
   // LoopSink (and other loop passes since the last simplifyCFG) might have
   // resulted in single-entry-single-exit or empty blocks. Clean up the CFG.
   OptimizePM.addPass(
       SimplifyCFGPass(SimplifyCFGOptions().convertSwitchRangeToICmp(true)));
 
-  OptimizePM.addPass(CoroCleanupPass());
-
   // Add the core optimizing pipeline.
   MPM.addPass(createModuleToFunctionPassAdaptor(std::move(OptimizePM),
                                                 PTO.EagerlyInvalidateAnalyses));
 
   for (auto &C : OptimizerLastEPCallbacks)
     C(MPM, Level);
 
   // Split out cold code. Splitting is done late to avoid hiding context from
PassBuilder::buildThinLTOPreLinkDefaultPipeline(OptimizationLevel Level) {
   // less information than will be available later and it may grow functions in
   // ways that aren't beneficial.
   if (RunPartialInlining)
     MPM.addPass(PartialInlinerPass());
 
   // Reduce the size of the IR as much as possible.
   MPM.addPass(GlobalOptPass());
 
-  // Module simplification splits coroutines, but does not fully clean up
-  // coroutine intrinsics. To ensure ThinLTO optimization passes don't trip up
-  // on these, we schedule the cleanup here.
-  MPM.addPass(createModuleToFunctionPassAdaptor(CoroCleanupPass()));
-
   if (PGOOpt && PGOOpt->PseudoProbeForProfiling &&
       PGOOpt->Action == PGOOptions::SampleUse)
     MPM.addPass(PseudoProbeUpdatePass());
 
   // Handle OptimizerLastEPCallbacks added by clang on PreLink. Actual
   // optimization is going to be done in PostLink stage, but clang can't
   // add callbacks there in case of in-process ThinLTO called by linker.
   for (auto &C : OptimizerLastEPCallbacks)

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

 ; CHECK-O23SZ-NEXT: Running pass: LICMPass
 ; CHECK-O23SZ-NEXT: Running pass: CoroElidePass
 ; CHECK-EP-SCALAR-LATE-NEXT: Running pass: NoOpFunctionPass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-EP-PEEPHOLE-NEXT: Running pass: NoOpFunctionPass
 ; CHECK-O-NEXT: Running pass: CoroSplitPass
 ; CHECK-O-NEXT: Invalidating analysis: InlineAdvisorAnalysis
+; CHECK-O-NEXT: Running pass: CoroCleanupPass
 ; CHECK-O-NEXT: Running pass: GlobalOptPass
 ; CHECK-O-NEXT: Running pass: GlobalDCEPass
 ; CHECK-DEFAULT-NEXT: Running pass: EliminateAvailableExternallyPass
 ; CHECK-LTO-NOT: Running pass: EliminateAvailableExternallyPass
 ; CHECK-O-NEXT: Running pass: ReversePostOrderFunctionAttrsPass
 ; CHECK-O-NEXT: Running pass: RecomputeGlobalsAAPass
 ; CHECK-EP-OPTIMIZER-EARLY: Running pass: NoOpModulePass
 ; CHECK-O-NEXT: Running pass: Float2IntPass

 ; CHECK-O-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-O-NEXT: Running pass: LCSSAPass
 ; CHECK-O-NEXT: Running pass: LICMPass
 ; CHECK-O-NEXT: Running pass: AlignmentFromAssumptionsPass
 ; CHECK-O-NEXT: Running pass: LoopSinkPass
 ; CHECK-O-NEXT: Running pass: InstSimplifyPass
 ; CHECK-O-NEXT: Running pass: DivRemPairsPass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
-; CHECK-O-NEXT: Running pass: CoroCleanupPass
 ; CHECK-EP-OPTIMIZER-LAST: Running pass: NoOpModulePass
 ; CHECK-HOT-COLD-SPLIT-NEXT: Running pass: HotColdSplittingPass
 ; CHECK-IR-OUTLINER-NEXT: Running pass: IROutlinerPass
 ; CHECK-IR-OUTLINER-NEXT: Running analysis: IRSimilarityAnalysis
 ; CHECK-MERGE-FUNCS-NEXT: Running pass: MergeFunctionsPass
 ; CHECK-O-NEXT: Running pass: CGProfilePass
 ; CHECK-O-NEXT: Running pass: GlobalDCEPass
 ; CHECK-O-NEXT: Running pass: ConstantMergePass

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

 ; CHECK-O23SZ-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-O23SZ-NEXT: Running pass: LCSSAPass
 ; CHECK-O23SZ-NEXT: Running pass: LICMPass on Loop at depth 1 containing: %loop
 ; CHECK-O23SZ-NEXT: Running pass: CoroElidePass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O-NEXT: Running pass: CoroSplitPass
 ; CHECK-O-NEXT: Invalidating analysis: InlineAdvisorAnalysis
+; CHECK-O-NEXT: Running pass: CoroCleanupPass
 ; CHECK-PRELINK-O-NEXT: Running pass: GlobalOptPass
 ; 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: RecomputeGlobalsAAPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: Float2IntPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: LowerConstantIntrinsicsPass

 ; CHECK-POSTLINK-O-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: LCSSAPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: LICMPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: AlignmentFromAssumptionsPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: LoopSinkPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: InstSimplifyPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: DivRemPairsPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: SimplifyCFGPass
-; CHECK-O-NEXT: Running pass: CoroCleanupPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: CGProfilePass
 ; CHECK-POSTLINK-O-NEXT: Running pass: GlobalDCEPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: ConstantMergePass
 ; CHECK-POSTLINK-O-NEXT: Running pass: RelLookupTableConverterPass
 ; CHECK-O-NEXT:          Running pass: AnnotationRemarksPass on foo
 ; CHECK-PRELINK-O-NEXT: Running pass: CanonicalizeAliasesPass
 ; CHECK-PRELINK-O-NEXT: Running pass: NameAnonGlobalPass
 ; CHECK-O-NEXT: Running pass: PrintModulePass

llvm/test/Other/new-pm-thinlto-postlink-pgo-defaults.ll

 ; CHECK-O23SZ-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-O23SZ-NEXT: Running pass: LCSSAPass
 ; CHECK-O23SZ-NEXT: Running pass: LICMPass
 ; CHECK-O23SZ-NEXT: Running pass: CoroElidePass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O-NEXT: Running pass: CoroSplitPass
 ; CHECK-O-NEXT: Invalidating analysis: InlineAdvisorAnalysis
+; CHECK-O-NEXT: Running pass: CoroCleanupPass
 ; 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: RecomputeGlobalsAAPass
 ; CHECK-O-NEXT: Running pass: Float2IntPass
 ; CHECK-O-NEXT: Running pass: LowerConstantIntrinsicsPass
 ; CHECK-EXT: Running pass: {{.*}}::Bye

 ; CHECK-O-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-O-NEXT: Running pass: LCSSAPass
 ; CHECK-O-NEXT: Running pass: LICMPass
 ; CHECK-O-NEXT: Running pass: AlignmentFromAssumptionsPass
 ; CHECK-O-NEXT: Running pass: LoopSinkPass
 ; CHECK-O-NEXT: Running pass: InstSimplifyPass
 ; CHECK-O-NEXT: Running pass: DivRemPairsPass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
-; CHECK-O-NEXT: Running pass: CoroCleanupPass
 ; CHECK-O-NEXT: Running pass: CGProfilePass
 ; CHECK-O-NEXT: Running pass: GlobalDCEPass
 ; CHECK-O-NEXT: Running pass: ConstantMergePass
 ; CHECK-O-NEXT: Running pass: RelLookupTableConverterPass
 ; CHECK-O-NEXT: Running pass: AnnotationRemarksPass on foo
 ; CHECK-O-NEXT: Running pass: PrintModulePass
 
 ; Make sure we get the IR back out without changes when we print the module.

llvm/test/Other/new-pm-thinlto-postlink-samplepgo-defaults.ll

 ; CHECK-O23SZ-NEXT: Running pass: CoroElidePass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O3-NEXT: Running pass: ControlHeightReductionPass on foo
 ; CHECK-O3-NEXT: Running analysis: RegionInfoAnalysis on foo
 ; CHECK-O3-NEXT: Running analysis: DominanceFrontierAnalysis on foo
 ; CHECK-O-NEXT: Running pass: CoroSplitPass
 ; CHECK-O-NEXT: Invalidating analysis: InlineAdvisorAnalysis
+; CHECK-O-NEXT: Running pass: CoroCleanupPass
 ; 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: RecomputeGlobalsAAPass
 ; CHECK-O-NEXT: Running pass: Float2IntPass
 ; CHECK-O-NEXT: Running pass: LowerConstantIntrinsicsPass
 ; CHECK-EXT: Running pass: {{.*}}::Bye

 ; CHECK-O-NEXT: Running pass: LoopSimplifyPass
 ; CHECK-O-NEXT: Running pass: LCSSAPass
 ; CHECK-O-NEXT: Running pass: LICMPass
 ; CHECK-O-NEXT: Running pass: AlignmentFromAssumptionsPass
 ; CHECK-O-NEXT: Running pass: LoopSinkPass
 ; CHECK-O-NEXT: Running pass: InstSimplifyPass
 ; CHECK-O-NEXT: Running pass: DivRemPairsPass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
-; CHECK-O-NEXT: Running pass: CoroCleanupPass
 ; CHECK-O-NEXT: Running pass: CGProfilePass
 ; CHECK-O-NEXT: Running pass: GlobalDCEPass
 ; CHECK-O-NEXT: Running pass: ConstantMergePass
 ; CHECK-O-NEXT: Running pass: RelLookupTableConverterPass
 ; CHECK-O-NEXT: Running pass: AnnotationRemarksPass on foo
 ; CHECK-O-NEXT: Running pass: PrintModulePass
 
 ; Make sure we get the IR back out without changes when we print the module.

llvm/test/Other/new-pm-thinlto-prelink-pgo-defaults.ll

 ; CHECK-O23SZ-NEXT: Running pass: CoroElidePass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O3-NEXT: Running pass: ControlHeightReductionPass on foo
 ; CHECK-O3-NEXT: Running analysis: RegionInfoAnalysis on foo
 ; CHECK-O3-NEXT: Running analysis: DominanceFrontierAnalysis on foo
 ; CHECK-O-NEXT: Running pass: CoroSplitPass
 ; CHECK-O-NEXT: Invalidating analysis: InlineAdvisorAnalysis
+; CHECK-O-NEXT: Running pass: CoroCleanupPass
 ; CHECK-O-NEXT: Running pass: GlobalOptPass
 ; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis on bar
 ; CHECK-EXT: Running pass: {{.*}}::Bye
-; CHECK-O-NEXT: Running pass: CoroCleanupPass
 ; CHECK-O-NEXT: Running pass: AnnotationRemarksPass on foo
 ; CHECK-O-NEXT: Running pass: CanonicalizeAliasesPass
 ; CHECK-O-NEXT: Running pass: NameAnonGlobalPass
 ; CHECK-O-NEXT: Running pass: PrintModulePass
 
 ; Make sure we get the IR back out without changes when we print the module.
 ; CHECK-O-LABEL: define void @foo(i32 %n) local_unnamed_addr {
 ; CHECK-O-NEXT: entry:

llvm/test/Other/new-pm-thinlto-prelink-samplepgo-defaults.ll

 ; CHECK-O23SZ-NEXT: Running pass: CoroElidePass
 ; CHECK-O-NEXT: Running pass: SimplifyCFGPass
 ; CHECK-O-NEXT: Running pass: InstCombinePass
 ; CHECK-O3-NEXT: Running pass: ControlHeightReductionPass on foo
 ; CHECK-O3-NEXT: Running analysis: RegionInfoAnalysis on foo
 ; CHECK-O3-NEXT: Running analysis: DominanceFrontierAnalysis on foo
 ; CHECK-O-NEXT: Running pass: CoroSplitPass
 ; CHECK-O-NEXT: Invalidating analysis: InlineAdvisorAnalysis
-; CHECK-O-NEXT: Running pass: GlobalOptPass
 ; CHECK-O-NEXT: Running pass: CoroCleanupPass
+; CHECK-O-NEXT: Running pass: GlobalOptPass
 ; CHECK-O-NEXT: Running pass: AnnotationRemarksPass on foo
 ; CHECK-O-NEXT: Running pass: CanonicalizeAliasesPass
 ; CHECK-O-NEXT: Running pass: NameAnonGlobalPass
 ; CHECK-O-NEXT: Running pass: PrintModulePass
 
 ; Make sure we get the IR back out without changes when we print the module.
 ; CHECK-O-LABEL: define void @foo(i32 %n) local_unnamed_addr
 ; CHECK-O-NEXT: entry:

llvm/test/Transforms/Coroutines/coro-retcon-opaque-ptr.ll

 cleanup:                                          ; preds = %loop
   %0 = call i1 @llvm.coro.end(ptr %hdl, i1 false)
   unreachable
 }
 
 define i32 @main() {
 ; CHECK-LABEL: @main(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    [[TMP0:%.*]] = alloca [8 x i8], align 4
-; CHECK-NEXT:    store i32 4, ptr [[TMP0]], align 4
 ; CHECK-NEXT:    call void @print(i32 4)
-; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl(metadata [[META0:![0-9]+]])
-; CHECK-NEXT:    [[N_VAL_RELOAD_I:%.*]] = load i32, ptr [[TMP0]], align 4, !alias.scope !0
-; CHECK-NEXT:    [[INC_I:%.*]] = add i32 [[N_VAL_RELOAD_I]], 1
-; CHECK-NEXT:    store i32 [[INC_I]], ptr [[TMP0]], align 4, !alias.scope !0
-; CHECK-NEXT:    call void @print(i32 [[INC_I]]), !noalias !0
-; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl(metadata [[META3:![0-9]+]])
-; CHECK-NEXT:    [[N_VAL_RELOAD_I1:%.*]] = load i32, ptr [[TMP0]], align 4, !alias.scope !3
-; CHECK-NEXT:    [[INC_I2:%.*]] = add i32 [[N_VAL_RELOAD_I1]], 1
-; CHECK-NEXT:    call void @print(i32 [[INC_I2]]), !noalias !3
+; CHECK-NEXT:    call void @print(i32 5), !noalias !0
+; CHECK-NEXT:    call void @print(i32 6), !noalias !3
 ; CHECK-NEXT:    ret i32 0
 ;
 entry:
   %0 = alloca [8 x i8], align 4
   %prepare = call ptr @llvm.coro.prepare.retcon(ptr @f)
   %cont0 = call ptr %prepare(ptr %0, i32 4)
   %cont1 = call ptr %cont0(ptr %0, i1 zeroext false)
   %cont2 = call ptr %cont1(ptr %0, i1 zeroext false)

llvm/test/Transforms/Coroutines/coro-retcon-resume-values.ll

 }
 
 
 
 define i32 @main() {
 ; CHECK-LABEL: @main(
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[TMP0:%.*]] = alloca i8*, align 8
-; CHECK-NEXT:    [[DOTSUB:%.*]] = bitcast i8** [[TMP0]] to i8*
 ; CHECK-NEXT:    [[TMP1:%.*]] = tail call i8* @allocate(i32 12)
 ; CHECK-NEXT:    store i8* [[TMP1]], i8** [[TMP0]], align 8
 ; CHECK-NEXT:    [[N_SPILL_ADDR_I:%.*]] = bitcast i8* [[TMP1]] to i32*
 ; CHECK-NEXT:    store i32 1, i32* [[N_SPILL_ADDR_I]], align 4
-; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl(metadata [[META0:![0-9]+]])
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8** [[TMP0]] to %f.Frame**
-; CHECK-NEXT:    [[FRAMEPTR_I:%.*]] = load %f.Frame*, %f.Frame** [[TMP2]], align 8, !alias.scope !0
-; CHECK-NEXT:    [[N_RELOAD_ADDR_I:%.*]] = getelementptr inbounds [[F_FRAME:%.*]], %f.Frame* [[FRAMEPTR_I]], i64 0, i32 0
-; CHECK-NEXT:    [[N_RELOAD_I:%.*]] = load i32, i32* [[N_RELOAD_ADDR_I]], align 4, !noalias !0
-; CHECK-NEXT:    [[N_VAL3_SPILL_ADDR_I:%.*]] = getelementptr inbounds [[F_FRAME]], %f.Frame* [[FRAMEPTR_I]], i64 0, i32 1
-; CHECK-NEXT:    store i32 [[N_RELOAD_I]], i32* [[N_VAL3_SPILL_ADDR_I]], align 4, !noalias !0
-; CHECK-NEXT:    [[INPUT_SPILL_ADDR_I:%.*]] = getelementptr inbounds [[F_FRAME]], %f.Frame* [[FRAMEPTR_I]], i64 0, i32 2
-; CHECK-NEXT:    store i32 2, i32* [[INPUT_SPILL_ADDR_I]], align 4, !noalias !0
+; CHECK-NEXT:    [[N_VAL3_SPILL_ADDR_I:%.*]] = getelementptr inbounds i8, i8* [[TMP1]], i64 4
+; CHECK-NEXT:    [[TMP3:%.*]] = bitcast i8* [[N_VAL3_SPILL_ADDR_I]] to i32*
+; CHECK-NEXT:    store i32 1, i32* [[TMP3]], align 4, !noalias !0
+; CHECK-NEXT:    [[INPUT_SPILL_ADDR_I:%.*]] = getelementptr inbounds i8, i8* [[TMP1]], i64 8
+; CHECK-NEXT:    [[TMP4:%.*]] = bitcast i8* [[INPUT_SPILL_ADDR_I]] to i32*
+; CHECK-NEXT:    store i32 2, i32* [[TMP4]], align 4, !noalias !0
 ; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl(metadata [[META3:![0-9]+]])
 ; CHECK-NEXT:    [[FRAMEPTR_I1:%.*]] = load %f.Frame*, %f.Frame** [[TMP2]], align 8, !alias.scope !3
-; CHECK-NEXT:    [[INPUT_RELOAD_ADDR13_I:%.*]] = getelementptr inbounds [[F_FRAME]], %f.Frame* [[FRAMEPTR_I1]], i64 0, i32 2
+; CHECK-NEXT:    [[INPUT_RELOAD_ADDR13_I:%.*]] = getelementptr inbounds [[F_FRAME:%.*]], %f.Frame* [[FRAMEPTR_I1]], i64 0, i32 2
 ; CHECK-NEXT:    [[INPUT_RELOAD14_I:%.*]] = load i32, i32* [[INPUT_RELOAD_ADDR13_I]], align 4, !noalias !3
 ; CHECK-NEXT:    [[N_VAL3_RELOAD_ADDR11_I:%.*]] = getelementptr inbounds [[F_FRAME]], %f.Frame* [[FRAMEPTR_I1]], i64 0, i32 1
 ; CHECK-NEXT:    [[N_VAL3_RELOAD12_I:%.*]] = load i32, i32* [[N_VAL3_RELOAD_ADDR11_I]], align 4, !noalias !3
 ; CHECK-NEXT:    [[SUM7_I:%.*]] = add i32 [[N_VAL3_RELOAD12_I]], [[INPUT_RELOAD14_I]]
 ; CHECK-NEXT:    store i32 [[SUM7_I]], i32* [[N_VAL3_RELOAD_ADDR11_I]], align 4, !noalias !3
 ; CHECK-NEXT:    store i32 4, i32* [[INPUT_RELOAD_ADDR13_I]], align 4, !noalias !3
 ; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl(metadata [[META6:![0-9]+]])
 ; CHECK-NEXT:    [[FRAMEPTR_I2:%.*]] = load %f.Frame*, %f.Frame** [[TMP2]], align 8, !alias.scope !6
 ; CHECK-NEXT:    [[INPUT_RELOAD_ADDR13_I3:%.*]] = getelementptr inbounds [[F_FRAME]], %f.Frame* [[FRAMEPTR_I2]], i64 0, i32 2
 ; CHECK-NEXT:    [[INPUT_RELOAD14_I4:%.*]] = load i32, i32* [[INPUT_RELOAD_ADDR13_I3]], align 4, !noalias !6
 ; CHECK-NEXT:    [[N_VAL3_RELOAD_ADDR11_I5:%.*]] = getelementptr inbounds [[F_FRAME]], %f.Frame* [[FRAMEPTR_I2]], i64 0, i32 1
 ; CHECK-NEXT:    [[N_VAL3_RELOAD12_I6:%.*]] = load i32, i32* [[N_VAL3_RELOAD_ADDR11_I5]], align 4, !noalias !6
 ; CHECK-NEXT:    [[SUM7_I7:%.*]] = add i32 [[N_VAL3_RELOAD12_I6]], [[INPUT_RELOAD14_I4]]
 ; CHECK-NEXT:    call void @print(i32 [[SUM7_I7]]), !noalias !6
-; CHECK-NEXT:    [[TMP3:%.*]] = bitcast %f.Frame* [[FRAMEPTR_I2]] to i8*
-; CHECK-NEXT:    call void @deallocate(i8* [[TMP3]]), !noalias !6
+; CHECK-NEXT:    [[TMP5:%.*]] = bitcast %f.Frame* [[FRAMEPTR_I2]] to i8*
+; CHECK-NEXT:    call void @deallocate(i8* [[TMP5]]), !noalias !6
 ; CHECK-NEXT:    ret i32 0
 ;
 entry:
   %0 = alloca [8 x i8], align 4
   %buffer = bitcast [8 x i8]* %0 to i8*
   %prepare = call i8* @llvm.coro.prepare.retcon(i8* bitcast (i8* (i8*, i32)* @f to i8*))
   %f = bitcast i8* %prepare to i8* (i8*, i32)*
   %cont0 = call i8* %f(i8* %buffer, i32 1)

llvm/test/Transforms/Coroutines/coro-retcon-value.ll

cleanup:
   unreachable
 }
 
 
 
 define i32 @main() {
 ; CHECK-LABEL: @main(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    [[TMP0:%.*]] = alloca [8 x i8], align 4
-; CHECK-NEXT:    [[DOTSUB:%.*]] = getelementptr inbounds [8 x i8], [8 x i8]* [[TMP0]], i64 0, i64 0
-; CHECK-NEXT:    [[N_VAL_SPILL_ADDR_I:%.*]] = bitcast [8 x i8]* [[TMP0]] to i32*
-; CHECK-NEXT:    store i32 4, i32* [[N_VAL_SPILL_ADDR_I]], align 4
 ; CHECK-NEXT:    call void @print(i32 4)
-; CHECK-NEXT:    [[N_VAL_RELOAD_I:%.*]] = load i32, i32* [[N_VAL_SPILL_ADDR_I]], align 4, !alias.scope !0
-; CHECK-NEXT:    [[INC_I:%.*]] = add i32 [[N_VAL_RELOAD_I]], 1
-; CHECK-NEXT:    store i32 [[INC_I]], i32* [[N_VAL_SPILL_ADDR_I]], align 4, !alias.scope !0
-; CHECK-NEXT:    call void @print(i32 [[INC_I]])
-; CHECK-NEXT:    [[N_VAL_RELOAD_I3:%.*]] = load i32, i32* [[N_VAL_SPILL_ADDR_I]], align 4, !alias.scope !3
-; CHECK-NEXT:    [[INC_I4:%.*]] = add i32 [[N_VAL_RELOAD_I3]], 1
-; CHECK-NEXT:    store i32 [[INC_I4]], i32* [[N_VAL_SPILL_ADDR_I]], align 4, !alias.scope !3
-; CHECK-NEXT:    call void @print(i32 [[INC_I4]])
+; CHECK-NEXT:    call void @print(i32 5)
+; CHECK-NEXT:    call void @print(i32 6)
 ; CHECK-NEXT:    ret i32 0
 ;
 entry:
   %0 = alloca [8 x i8], align 4
   %buffer = bitcast [8 x i8]* %0 to i8*
   %prepare = call i8* @llvm.coro.prepare.retcon(i8* bitcast ({i8*, i32} (i8*, i32)* @f to i8*))
   %f = bitcast i8* %prepare to {i8*, i32} (i8*, i32)*
   %result0 = call {i8*, i32} %f(i8* %buffer, i32 4)

llvm/test/Transforms/Coroutines/coro-retcon.ll

cleanup:
   unreachable
 }
 
 
 
 define i32 @main() {
 ; CHECK-LABEL: @main(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    [[TMP0:%.*]] = alloca [8 x i8], align 4
-; CHECK-NEXT:    [[DOTSUB:%.*]] = getelementptr inbounds [8 x i8], [8 x i8]* [[TMP0]], i64 0, i64 0
-; CHECK-NEXT:    [[N_VAL_SPILL_ADDR_I:%.*]] = bitcast [8 x i8]* [[TMP0]] to i32*
-; CHECK-NEXT:    store i32 4, i32* [[N_VAL_SPILL_ADDR_I]], align 4
 ; CHECK-NEXT:    call void @print(i32 4)
-; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl(metadata [[META0:![0-9]+]])
-; CHECK-NEXT:    [[N_VAL_RELOAD_I:%.*]] = load i32, i32* [[N_VAL_SPILL_ADDR_I]], align 4, !alias.scope !0
-; CHECK-NEXT:    [[INC_I:%.*]] = add i32 [[N_VAL_RELOAD_I]], 1
-; CHECK-NEXT:    store i32 [[INC_I]], i32* [[N_VAL_SPILL_ADDR_I]], align 4, !alias.scope !0
-; CHECK-NEXT:    call void @print(i32 [[INC_I]]), !noalias !0
-; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl(metadata [[META3:![0-9]+]])
-; CHECK-NEXT:    [[N_VAL_RELOAD_I3:%.*]] = load i32, i32* [[N_VAL_SPILL_ADDR_I]], align 4, !alias.scope !3
-; CHECK-NEXT:    [[INC_I4:%.*]] = add i32 [[N_VAL_RELOAD_I3]], 1
-; CHECK-NEXT:    call void @print(i32 [[INC_I4]]), !noalias !3
+; CHECK-NEXT:    call void @print(i32 5), !noalias !0
+; CHECK-NEXT:    call void @print(i32 6), !noalias !3
 ; CHECK-NEXT:    ret i32 0
 ;
 entry:
   %0 = alloca [8 x i8], align 4
   %buffer = bitcast [8 x i8]* %0 to i8*
   %prepare = call i8* @llvm.coro.prepare.retcon(i8* bitcast (i8* (i8*, i32)* @f to i8*))
   %f = bitcast i8* %prepare to i8* (i8*, i32)*
   %cont0 = call i8* %f(i8* %buffer, i32 4)