; LLVM IR from stan-dev/math :: lib/tbb_2020.3/src/test/test_task.ll (Z17TestLeftRecursioni)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"class.Harness::internal::Tracer" = type <{ i32, [4 x i8], ptr, ptr, i64, [8 x i8] }>
%"class.tbb::task_scheduler_init" = type { ptr }

@_ZN7Harness8internalL6tracerE = external hidden global %"class.Harness::internal::Tracer", align 8
@_ZL7Verbose = external hidden global i8, align 1
@.str.17 = external hidden unnamed_addr constant [85 x i8], align 1
@__FUNCTION__._Z17TestLeftRecursioni = external hidden unnamed_addr constant [18 x i8], align 1
@.str.26 = external hidden unnamed_addr constant [42 x i8], align 1
@.str.27 = external hidden unnamed_addr constant [10 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN7Harness8internal6Tracer14set_trace_infoEiPKcmS3_(ptr noundef nonnull align 8 dereferenceable(33), i32 noundef, ptr noundef, i64 noundef, ptr noundef) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7Harness8internal6Tracer5traceEPKcz(ptr noundef nonnull align 8 dereferenceable(33), ptr noundef, ...) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z11ReportErrorPKciS0_S0_(ptr noundef, i32 noundef, ptr noundef, ptr noundef) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN3tbb19task_scheduler_initC2Eim(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef, i64 noundef) unnamed_addr #2 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN3tbb19task_scheduler_initD2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3Fibi(i32 noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z17TestLeftRecursioni(i32 noundef %0) #2 personality ptr @__gxx_personality_v0 {
  %2 = alloca i32, align 4
  %3 = alloca %"class.tbb::task_scheduler_init", align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %8 = load i8, ptr @_ZL7Verbose, align 1, !tbaa !9, !range !11, !noundef !12
  %9 = trunc i8 %8 to i1
  br i1 %9, label %11, label %10

10:                                               ; preds = %1
  br label %14

11:                                               ; preds = %1
  %12 = call noundef ptr @_ZN7Harness8internal6Tracer14set_trace_infoEiPKcmS3_(ptr noundef nonnull align 8 dereferenceable(33) @_ZN7Harness8internalL6tracerE, i32 noundef 0, ptr noundef @.str.17, i64 noundef 425, ptr noundef @__FUNCTION__._Z17TestLeftRecursioni)
  %13 = load i32, ptr %2, align 4, !tbaa !5
  call void (ptr, ptr, ...) @_ZN7Harness8internal6Tracer5traceEPKcz(ptr noundef nonnull align 8 dereferenceable(33) %12, ptr noundef @.str.26, i32 noundef %13)
  br label %14

14:                                               ; preds = %11, %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %15 = load i32, ptr %2, align 4, !tbaa !5
  call void @_ZN3tbb19task_scheduler_initC2Eim(ptr noundef nonnull align 8 dereferenceable(8) %3, i32 noundef %15, i64 noundef 0)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %25, %14
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = icmp slt i32 %17, 100
  br i1 %18, label %20, label %19

19:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %32

20:                                               ; preds = %16
  %21 = invoke noundef i32 @_Z3Fibi(i32 noundef 10)
          to label %22 unwind label %28

22:                                               ; preds = %20
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = add nsw i32 %23, %21
  store i32 %24, ptr %4, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %22
  %26 = load i32, ptr %5, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %5, align 4, !tbaa !5
  br label %16, !llvm.loop !13

28:                                               ; preds = %20
  %29 = landingpad { ptr, i32 }
          cleanup
  %30 = extractvalue { ptr, i32 } %29, 0
  store ptr %30, ptr %6, align 8
  %31 = extractvalue { ptr, i32 } %29, 1
  store i32 %31, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %43

32:                                               ; preds = %19
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = icmp eq i32 %33, 5500
  br i1 %34, label %35, label %36

35:                                               ; preds = %32
  br label %38

36:                                               ; preds = %32
  invoke void @_Z11ReportErrorPKciS0_S0_(ptr noundef @.str.17, i32 noundef 430, ptr noundef @.str.27, ptr noundef null)
          to label %37 unwind label %39

37:                                               ; preds = %36
  br label %38

38:                                               ; preds = %37, %35
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @_ZN3tbb19task_scheduler_initD2Ev(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  ret void

39:                                               ; preds = %36
  %40 = landingpad { ptr, i32 }
          cleanup
  %41 = extractvalue { ptr, i32 } %40, 0
  store ptr %41, ptr %6, align 8
  %42 = extractvalue { ptr, i32 } %40, 1
  store i32 %42, ptr %7, align 4
  br label %43

43:                                               ; preds = %39, %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @_ZN3tbb19task_scheduler_initD2Ev(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %44

44:                                               ; preds = %43
  %45 = load ptr, ptr %6, align 8
  %46 = load i32, ptr %7, align 4
  %47 = insertvalue { ptr, i32 } poison, ptr %45, 0
  %48 = insertvalue { ptr, i32 } %47, i32 %46, 1
  resume { ptr, i32 } %48
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"class.Harness::internal::Tracer" = type <{ i32, [4 x i8], ptr, ptr, i64, [8 x i8] }>
%"class.tbb::task_scheduler_init" = type { ptr }

@_ZN7Harness8internalL6tracerE = external hidden global %"class.Harness::internal::Tracer", align 8
@_ZL7Verbose = external hidden local_unnamed_addr global i8, align 1
@.str.17 = external hidden unnamed_addr constant [85 x i8], align 1
@__FUNCTION__._Z17TestLeftRecursioni = external hidden unnamed_addr constant [18 x i8], align 1
@.str.26 = external hidden unnamed_addr constant [42 x i8], align 1
@.str.27 = external hidden unnamed_addr constant [10 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN7Harness8internal6Tracer14set_trace_infoEiPKcmS3_(ptr noundef nonnull align 8 dereferenceable(33), i32 noundef, ptr noundef, i64 noundef, ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7Harness8internal6Tracer5traceEPKcz(ptr noundef nonnull align 8 dereferenceable(33), ptr noundef, ...) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z11ReportErrorPKciS0_S0_(ptr noundef, i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN3tbb19task_scheduler_initC2Eim(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef, i64 noundef) unnamed_addr #2 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN3tbb19task_scheduler_initD2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3Fibi(i32 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z17TestLeftRecursioni(i32 noundef %0) local_unnamed_addr #2 personality ptr @__gxx_personality_v0 {
  %2 = alloca %"class.tbb::task_scheduler_init", align 8
  %3 = load i8, ptr @_ZL7Verbose, align 1, !tbaa !5, !range !9, !noundef !10
  %4 = trunc nuw i8 %3 to i1
  br i1 %4, label %5, label %7

5:                                                ; preds = %1
  %6 = tail call noundef ptr @_ZN7Harness8internal6Tracer14set_trace_infoEiPKcmS3_(ptr noundef nonnull align 8 dereferenceable(33) @_ZN7Harness8internalL6tracerE, i32 noundef 0, ptr noundef nonnull @.str.17, i64 noundef 425, ptr noundef nonnull @__FUNCTION__._Z17TestLeftRecursioni)
  tail call void (ptr, ptr, ...) @_ZN7Harness8internal6Tracer5traceEPKcz(ptr noundef nonnull align 8 dereferenceable(33) %6, ptr noundef nonnull @.str.26, i32 noundef %0)
  br label %7

7:                                                ; preds = %1, %5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  call void @_ZN3tbb19task_scheduler_initC2Eim(ptr noundef nonnull align 8 dereferenceable(8) %2, i32 noundef %0, i64 noundef 0)
  br label %10

8:                                                ; preds = %12
  %9 = icmp eq i32 %13, 5500
  br i1 %9, label %18, label %17

10:                                               ; preds = %7, %12
  %.0813 = phi i32 [ 0, %7 ], [ %14, %12 ]
  %.0912 = phi i32 [ 0, %7 ], [ %13, %12 ]
  %11 = invoke noundef i32 @_Z3Fibi(i32 noundef 10)
          to label %12 unwind label %15

12:                                               ; preds = %10
  %13 = add nsw i32 %11, %.0912
  %14 = add nuw nsw i32 %.0813, 1
  %exitcond.not = icmp eq i32 %14, 100
  br i1 %exitcond.not, label %8, label %10, !llvm.loop !11

15:                                               ; preds = %10
  %16 = landingpad { ptr, i32 }
          cleanup
  br label %21

17:                                               ; preds = %8
  invoke void @_Z11ReportErrorPKciS0_S0_(ptr noundef nonnull @.str.17, i32 noundef 430, ptr noundef nonnull @.str.27, ptr noundef null)
          to label %18 unwind label %19

18:                                               ; preds = %17, %8
  call void @_ZN3tbb19task_scheduler_initD2Ev(ptr noundef nonnull align 8 dereferenceable(8) %2) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  ret void

19:                                               ; preds = %17
  %20 = landingpad { ptr, i32 }
          cleanup
  br label %21

21:                                               ; preds = %19, %15
  %.pn = phi { ptr, i32 } [ %16, %15 ], [ %20, %19 ]
  call void @_ZN3tbb19task_scheduler_initD2Ev(ptr noundef nonnull align 8 dereferenceable(8) %2) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  resume { ptr, i32 } %.pn
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"bool", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{i8 0, i8 2}
!10 = !{}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass