; LLVM IR from stan-dev/math :: lib/tbb_2020.3/src/test/test_task.ll (Z14TestUserThreadi)

; 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.tbb::task_scheduler_init" = type { ptr }
%"class.tbb::internal::tbb_thread_v3" = type { i64 }

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

; 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 @_ZN3tbb19task_scheduler_initC2Eim(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef, i64 noundef) unnamed_addr #1 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 #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z32RunSchedulerInstanceOnUserThreadi(i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z14TestUserThreadi(i32 noundef %0) #1 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 %"class.tbb::internal::tbb_thread_v3", align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %8 = load i32, ptr %2, align 4, !tbaa !5
  call void @_ZN3tbb19task_scheduler_initC2Eim(ptr noundef nonnull align 8 dereferenceable(8) %3, i32 noundef %8, i64 noundef 0)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %17, %1
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = icmp slt i32 %10, 2
  br i1 %11, label %13, label %12

12:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  br label %29

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %14 = load i32, ptr %4, align 4, !tbaa !5
  invoke void @_ZN3tbb8internal13tbb_thread_v3C2IPFviEiEET_T0_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef @_Z32RunSchedulerInstanceOnUserThreadi, i32 noundef %14)
          to label %15 unwind label %20

15:                                               ; preds = %13
  invoke void @_ZN3tbb8internal13tbb_thread_v34joinEv(ptr noundef nonnull align 8 dereferenceable(8) %5)
          to label %16 unwind label %24

16:                                               ; preds = %15
  call void @_ZN3tbb8internal13tbb_thread_v3D2Ev(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %17

17:                                               ; preds = %16
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %4, align 4, !tbaa !5
  br label %9, !llvm.loop !9

20:                                               ; preds = %13
  %21 = landingpad { ptr, i32 }
          cleanup
  %22 = extractvalue { ptr, i32 } %21, 0
  store ptr %22, ptr %6, align 8
  %23 = extractvalue { ptr, i32 } %21, 1
  store i32 %23, ptr %7, align 4
  br label %28

24:                                               ; preds = %15
  %25 = landingpad { ptr, i32 }
          cleanup
  %26 = extractvalue { ptr, i32 } %25, 0
  store ptr %26, ptr %6, align 8
  %27 = extractvalue { ptr, i32 } %25, 1
  store i32 %27, ptr %7, align 4
  call void @_ZN3tbb8internal13tbb_thread_v3D2Ev(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  br label %28

28:                                               ; preds = %24, %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @_ZN3tbb19task_scheduler_initD2Ev(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  br label %30

29:                                               ; preds = %12
  call void @_ZN3tbb19task_scheduler_initD2Ev(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret void

30:                                               ; preds = %28
  %31 = load ptr, ptr %6, align 8
  %32 = load i32, ptr %7, align 4
  %33 = insertvalue { ptr, i32 } poison, ptr %31, 0
  %34 = insertvalue { ptr, i32 } %33, i32 %32, 1
  resume { ptr, i32 } %34
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN3tbb8internal13tbb_thread_v3C2IPFviEiEET_T0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef, i32 noundef) unnamed_addr #1 align 2

declare void @_ZN3tbb8internal13tbb_thread_v34joinEv(ptr noundef nonnull align 8 dereferenceable(8)) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN3tbb8internal13tbb_thread_v3D2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #3 = { "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 #4 = { 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 = distinct !{!9, !10}
!10 = !{!"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.tbb::task_scheduler_init" = type { ptr }
%"class.tbb::internal::tbb_thread_v3" = type { i64 }

; 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 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 @_ZN3tbb19task_scheduler_initC2Eim(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef, i64 noundef) unnamed_addr #1 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 #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z32RunSchedulerInstanceOnUserThreadi(i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z14TestUserThreadi(i32 noundef %0) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %2 = alloca %"class.tbb::task_scheduler_init", align 8
  %3 = alloca %"class.tbb::internal::tbb_thread_v3", align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  call void @_ZN3tbb19task_scheduler_initC2Eim(ptr noundef nonnull align 8 dereferenceable(8) %2, i32 noundef %0, i64 noundef 0)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  invoke void @_ZN3tbb8internal13tbb_thread_v3C2IPFviEiEET_T0_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull @_Z32RunSchedulerInstanceOnUserThreadi, i32 noundef 0)
          to label %4 unwind label %8

4:                                                ; preds = %1
  invoke void @_ZN3tbb8internal13tbb_thread_v34joinEv(ptr noundef nonnull align 8 dereferenceable(8) %3)
          to label %5 unwind label %10

5:                                                ; preds = %4
  call void @_ZN3tbb8internal13tbb_thread_v3D2Ev(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  invoke void @_ZN3tbb8internal13tbb_thread_v3C2IPFviEiEET_T0_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull @_Z32RunSchedulerInstanceOnUserThreadi, i32 noundef 1)
          to label %6 unwind label %8

6:                                                ; preds = %5
  invoke void @_ZN3tbb8internal13tbb_thread_v34joinEv(ptr noundef nonnull align 8 dereferenceable(8) %3)
          to label %7 unwind label %10

7:                                                ; preds = %6
  call void @_ZN3tbb8internal13tbb_thread_v3D2Ev(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @_ZN3tbb19task_scheduler_initD2Ev(ptr noundef nonnull align 8 dereferenceable(8) %2) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  ret void

8:                                                ; preds = %5, %1
  %9 = landingpad { ptr, i32 }
          cleanup
  br label %12

10:                                               ; preds = %6, %4
  %11 = landingpad { ptr, i32 }
          cleanup
  call void @_ZN3tbb8internal13tbb_thread_v3D2Ev(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  br label %12

12:                                               ; preds = %10, %8
  %.pn = phi { ptr, i32 } [ %11, %10 ], [ %9, %8 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @_ZN3tbb19task_scheduler_initD2Ev(ptr noundef nonnull align 8 dereferenceable(8) %2) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  resume { ptr, i32 } %.pn
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN3tbb8internal13tbb_thread_v3C2IPFviEiEET_T0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef, i32 noundef) unnamed_addr #1 align 2

declare void @_ZN3tbb8internal13tbb_thread_v34joinEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN3tbb8internal13tbb_thread_v3D2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #3 = { "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 #4 = { 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)"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,SimplifyCFGPass