; LLVM IR from stan-dev/math :: lib/tbb_2020.3/src/test/test_tbb_fork.ll (Z17TestBlockNonblockv)

; 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.RunWorkersBody = type { i8 }

@_ZN7Harness8internalL6tracerE = external hidden global %"class.Harness::internal::Tracer", align 8
@_ZL7Verbose = external hidden global i8, align 1
@.str.19 = external hidden unnamed_addr constant [89 x i8], align 1
@__FUNCTION__._Z17TestBlockNonblockv = external hidden unnamed_addr constant [18 x i8], align 1
@.str.20 = external hidden unnamed_addr constant [15 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
define dso_local void @_Z17TestBlockNonblockv() #2 {
  %1 = alloca i32, align 4
  %2 = alloca %class.RunWorkersBody, align 1
  %3 = alloca %class.RunWorkersBody, align 1
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  store i32 0, ptr %1, align 4, !tbaa !5
  br label %4

4:                                                ; preds = %16, %0
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = icmp slt i32 %5, 100
  br i1 %6, label %8, label %7

7:                                                ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  br label %19

8:                                                ; preds = %4
  %9 = load i8, ptr @_ZL7Verbose, align 1, !tbaa !9, !range !11, !noundef !12
  %10 = trunc i8 %9 to i1
  br i1 %10, label %12, label %11

11:                                               ; preds = %8
  br label %15

12:                                               ; preds = %8
  %13 = call noundef ptr @_ZN7Harness8internal6Tracer14set_trace_infoEiPKcmS3_(ptr noundef nonnull align 8 dereferenceable(33) @_ZN7Harness8internalL6tracerE, i32 noundef 0, ptr noundef @.str.19, i64 noundef 122, ptr noundef @__FUNCTION__._Z17TestBlockNonblockv)
  %14 = load i32, ptr %1, align 4, !tbaa !5
  call void (ptr, ptr, ...) @_ZN7Harness8internal6Tracer5traceEPKcz(ptr noundef nonnull align 8 dereferenceable(33) %13, ptr noundef @.str.20, i32 noundef %14)
  br label %15

15:                                               ; preds = %12, %11
  call void @llvm.lifetime.start.p0(i64 1, ptr %2) #3
  call void @_ZN14RunWorkersBodyC2Eb(ptr noundef nonnull align 1 dereferenceable(1) %2, i1 noundef zeroext false)
  call void @_Z17NativeParallelForIi14RunWorkersBodyEvT_RKT0_(i32 noundef 4, ptr noundef nonnull align 1 dereferenceable(1) %2)
  call void @llvm.lifetime.end.p0(i64 1, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 1, ptr %3) #3
  call void @_ZN14RunWorkersBodyC2Eb(ptr noundef nonnull align 1 dereferenceable(1) %3, i1 noundef zeroext true)
  call void @_ZNK14RunWorkersBodyclEi(ptr noundef nonnull align 1 dereferenceable(1) %3, i32 noundef 0)
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #3
  br label %16

16:                                               ; preds = %15
  %17 = load i32, ptr %1, align 4, !tbaa !5
  %18 = add nsw i32 %17, 1
  store i32 %18, ptr %1, align 4, !tbaa !5
  br label %4, !llvm.loop !13

19:                                               ; preds = %7
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z17NativeParallelForIi14RunWorkersBodyEvT_RKT0_(i32 noundef, ptr noundef nonnull align 1 dereferenceable(1)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN14RunWorkersBodyC2Eb(ptr noundef nonnull align 1 dereferenceable(1), i1 noundef zeroext) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK14RunWorkersBodyclEi(ptr noundef nonnull align 1 dereferenceable(1), i32 noundef) #2 align 2

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.RunWorkersBody = type { i8 }

@_ZN7Harness8internalL6tracerE = external hidden global %"class.Harness::internal::Tracer", align 8
@_ZL7Verbose = external hidden local_unnamed_addr global i8, align 1
@.str.19 = external hidden unnamed_addr constant [89 x i8], align 1
@__FUNCTION__._Z17TestBlockNonblockv = external hidden unnamed_addr constant [18 x i8], align 1
@.str.20 = external hidden unnamed_addr constant [15 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
define dso_local void @_Z17TestBlockNonblockv() local_unnamed_addr #2 {
  %1 = alloca %class.RunWorkersBody, align 1
  %2 = alloca %class.RunWorkersBody, align 1
  br label %4

3:                                                ; preds = %9
  ret void

4:                                                ; preds = %0, %9
  %.03 = phi i32 [ 0, %0 ], [ %10, %9 ]
  %5 = load i8, ptr @_ZL7Verbose, align 1, !tbaa !5, !range !9, !noundef !10
  %6 = trunc nuw i8 %5 to i1
  br i1 %6, label %7, label %9

7:                                                ; preds = %4
  %8 = call noundef ptr @_ZN7Harness8internal6Tracer14set_trace_infoEiPKcmS3_(ptr noundef nonnull align 8 dereferenceable(33) @_ZN7Harness8internalL6tracerE, i32 noundef 0, ptr noundef nonnull @.str.19, i64 noundef 122, ptr noundef nonnull @__FUNCTION__._Z17TestBlockNonblockv)
  call void (ptr, ptr, ...) @_ZN7Harness8internal6Tracer5traceEPKcz(ptr noundef nonnull align 8 dereferenceable(33) %8, ptr noundef nonnull @.str.20, i32 noundef %.03)
  br label %9

9:                                                ; preds = %4, %7
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %1) #3
  call void @_ZN14RunWorkersBodyC2Eb(ptr noundef nonnull align 1 dereferenceable(1) %1, i1 noundef zeroext false)
  call void @_Z17NativeParallelForIi14RunWorkersBodyEvT_RKT0_(i32 noundef 4, ptr noundef nonnull align 1 dereferenceable(1) %1)
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %1) #3
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %2) #3
  call void @_ZN14RunWorkersBodyC2Eb(ptr noundef nonnull align 1 dereferenceable(1) %2, i1 noundef zeroext true)
  call void @_ZNK14RunWorkersBodyclEi(ptr noundef nonnull align 1 dereferenceable(1) %2, i32 noundef 0)
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %2) #3
  %10 = add nuw nsw i32 %.03, 1
  %exitcond.not = icmp eq i32 %10, 100
  br i1 %exitcond.not, label %3, label %4, !llvm.loop !11
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z17NativeParallelForIi14RunWorkersBodyEvT_RKT0_(i32 noundef, ptr noundef nonnull align 1 dereferenceable(1)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN14RunWorkersBodyC2Eb(ptr noundef nonnull align 1 dereferenceable(1), i1 noundef zeroext) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK14RunWorkersBodyclEi(ptr noundef nonnull align 1 dereferenceable(1), i32 noundef) local_unnamed_addr #2 align 2

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: GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,SimplifyCFGPass