; LLVM IR from ponylang/ponyc :: src/libponyrt/sched (scheduler)

; 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"

; 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: nounwind uwtable
define dso_local void @ponyint_sched_maybe_wakeup_if_all_asleep(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %4 = call i32 @get_active_scheduler_count()
  store i32 %4, ptr %3, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %26, %1
  %6 = call i32 @get_active_scheduler_count()
  store i32 %6, ptr %3, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %8, label %27

8:                                                ; preds = %5
  %9 = load i32, ptr %2, align 4, !tbaa !5
  call void @ponyint_sched_maybe_wakeup(i32 noundef %9)
  %10 = call i32 @get_active_scheduler_count()
  store i32 %10, ptr %3, align 4, !tbaa !5
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = icmp uge i32 %11, 1
  br i1 %12, label %13, label %26

13:                                               ; preds = %8
  br label %14

14:                                               ; preds = %22, %13
  %15 = call i32 @get_active_scheduler_count_check()
  %16 = icmp eq i32 %15, 0
  br i1 %16, label %17, label %20

17:                                               ; preds = %14
  %18 = call i32 @get_active_scheduler_count()
  %19 = icmp ugt i32 %18, 0
  br label %20

20:                                               ; preds = %17, %14
  %21 = phi i1 [ false, %14 ], [ %19, %17 ]
  br i1 %21, label %22, label %25

22:                                               ; preds = %20
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = load i32, ptr %2, align 4, !tbaa !5
  call void @signal_suspended_threads(i32 noundef %23, i32 noundef %24)
  br label %14, !llvm.loop !9

25:                                               ; preds = %20
  br label %26

26:                                               ; preds = %25, %8
  br label %5, !llvm.loop !11

27:                                               ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret void
}

; Function Attrs: nounwind uwtable
declare dso_local void @ponyint_sched_maybe_wakeup(i32 noundef) #1

; Function Attrs: nounwind uwtable
declare hidden void @signal_suspended_threads(i32 noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
declare hidden i32 @get_active_scheduler_count() #1

; Function Attrs: nounwind uwtable
declare hidden i32 @get_active_scheduler_count_check() #1

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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"

; Function Attrs: nounwind uwtable
define dso_local void @ponyint_sched_maybe_wakeup_if_all_asleep(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call i32 @get_active_scheduler_count()
  %3 = tail call i32 @get_active_scheduler_count()
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %.lr.ph6, label %._crit_edge

.lr.ph6:                                          ; preds = %1, %.critedge
  tail call void @ponyint_sched_maybe_wakeup(i32 noundef %0)
  %5 = tail call i32 @get_active_scheduler_count()
  %.not = icmp eq i32 %5, 0
  br i1 %.not, label %.critedge, label %.preheader

.preheader:                                       ; preds = %.lr.ph6
  %6 = tail call i32 @get_active_scheduler_count_check()
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %.lr.ph, label %.critedge

.lr.ph:                                           ; preds = %.preheader, %9
  %8 = tail call i32 @get_active_scheduler_count()
  %.not4 = icmp eq i32 %8, 0
  br i1 %.not4, label %.critedge, label %9

9:                                                ; preds = %.lr.ph
  tail call void @signal_suspended_threads(i32 noundef %5, i32 noundef %0)
  %10 = tail call i32 @get_active_scheduler_count_check()
  %11 = icmp eq i32 %10, 0
  br i1 %11, label %.lr.ph, label %.critedge, !llvm.loop !5

.critedge:                                        ; preds = %9, %.lr.ph, %.preheader, %.lr.ph6
  %12 = tail call i32 @get_active_scheduler_count()
  %13 = icmp eq i32 %12, 0
  br i1 %13, label %.lr.ph6, label %._crit_edge, !llvm.loop !7

._crit_edge:                                      ; preds = %.critedge, %1
  ret void
}

; Function Attrs: nounwind uwtable
declare dso_local void @ponyint_sched_maybe_wakeup(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden void @signal_suspended_threads(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden i32 @get_active_scheduler_count() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden i32 @get_active_scheduler_count_check() local_unnamed_addr #0

attributes #0 = { 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = distinct !{!7, !6}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass