; LLVM IR from matz/streem :: src (core)

; 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"

@stream_count = external hidden global i32, align 4

; Function Attrs: nounwind
declare i32 @sched_yield() #0

; Function Attrs: nounwind uwtable
define dso_local i32 @strm_loop() #1 {
  %1 = alloca i32, align 4
  %2 = load i32, ptr @stream_count, align 4, !tbaa !5
  %3 = icmp eq i32 %2, 0
  br i1 %3, label %4, label %5

4:                                                ; preds = %0
  store i32 0, ptr %1, align 4
  br label %13

5:                                                ; preds = %0
  call void @task_init()
  br label %6

6:                                                ; preds = %11, %5
  %7 = call i32 @sched_yield() #2
  %8 = load i32, ptr @stream_count, align 4, !tbaa !5
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %10, label %11

10:                                               ; preds = %6
  br label %12

11:                                               ; preds = %6
  br label %6

12:                                               ; preds = %10
  store i32 0, ptr %1, align 4
  br label %13

13:                                               ; preds = %12, %4
  %14 = load i32, ptr %1, align 4
  ret i32 %14
}

; Function Attrs: nounwind uwtable
declare hidden void @task_init() #1

attributes #0 = { nounwind "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 #1 = { 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 = { 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/C++ TBAA"}


; 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"

@stream_count = external hidden local_unnamed_addr global i32, align 4

; Function Attrs: nounwind
declare i32 @sched_yield() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @strm_loop() local_unnamed_addr #1 {
  %1 = load i32, ptr @stream_count, align 4, !tbaa !5
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %.loopexit, label %3

3:                                                ; preds = %0
  tail call void @task_init()
  br label %4

4:                                                ; preds = %4, %3
  %5 = tail call i32 @sched_yield() #2
  %6 = load i32, ptr @stream_count, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %.loopexit, label %4

.loopexit:                                        ; preds = %4, %0
  ret i32 0
}

; Function Attrs: nounwind uwtable
declare hidden void @task_init() local_unnamed_addr #1

attributes #0 = { nounwind "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 #1 = { 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 = { 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/C++ TBAA"}


; Effective O3 passes: GlobalOptPass,JumpThreadingPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass