; LLVM IR from buaazp/zimg :: deps/libevhtp (evthr)

; 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"

%struct.evthr_pool = type { i32, %struct.evthr_pool_slist }
%struct.evthr_pool_slist = type { ptr, ptr }
%struct.evthr = type { i32, i32, i32, i32, i8, ptr, ptr, %union.pthread_mutex_t, %union.pthread_mutex_t, %union.pthread_mutex_t, ptr, ptr, ptr, ptr, %struct.anon }
%union.pthread_mutex_t = type { %struct.__pthread_mutex_s }
%struct.__pthread_mutex_s = type { i32, i32, i32, i32, i32, i16, i16, %struct.__pthread_internal_list }
%struct.__pthread_internal_list = type { ptr, ptr }
%struct.anon = type { ptr, ptr }

; Function Attrs: inlinehint nounwind uwtable
declare dso_local i32 @evthr_get_backlog(ptr noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @evthr_defer(ptr noundef, ptr noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @evthr_pool_defer(ptr noundef %0, ptr noundef %1, ptr noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store ptr null, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  store ptr null, ptr %9, align 8, !tbaa !5
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = icmp eq ptr %13, null
  br i1 %14, label %15, label %16

15:                                               ; preds = %3
  store i32 4, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %68

16:                                               ; preds = %3
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = icmp eq ptr %17, null
  br i1 %18, label %19, label %20

19:                                               ; preds = %16
  store i32 3, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %68

20:                                               ; preds = %16
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.evthr_pool, ptr %21, i32 0, i32 1
  %23 = getelementptr inbounds %struct.evthr_pool_slist, ptr %22, i32 0, i32 0
  %24 = load ptr, ptr %23, align 8, !tbaa !9
  store ptr %24, ptr %9, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %58, %20
  %26 = load ptr, ptr %9, align 8, !tbaa !5
  %27 = icmp ne ptr %26, null
  br i1 %27, label %28, label %63

28:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  store i32 0, ptr %11, align 4, !tbaa !13
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #3
  store i32 0, ptr %12, align 4, !tbaa !13
  %29 = load ptr, ptr %9, align 8, !tbaa !5
  %30 = call i32 @evthr_get_backlog(ptr noundef %29)
  store i32 %30, ptr %11, align 4, !tbaa !13
  %31 = load ptr, ptr %8, align 8, !tbaa !5
  %32 = icmp ne ptr %31, null
  br i1 %32, label %33, label %36

33:                                               ; preds = %28
  %34 = load ptr, ptr %8, align 8, !tbaa !5
  %35 = call i32 @evthr_get_backlog(ptr noundef %34)
  store i32 %35, ptr %12, align 4, !tbaa !13
  br label %36

36:                                               ; preds = %33, %28
  %37 = load ptr, ptr %8, align 8, !tbaa !5
  %38 = icmp eq ptr %37, null
  br i1 %38, label %39, label %41

39:                                               ; preds = %36
  %40 = load ptr, ptr %9, align 8, !tbaa !5
  store ptr %40, ptr %8, align 8, !tbaa !5
  br label %54

41:                                               ; preds = %36
  %42 = load i32, ptr %11, align 4, !tbaa !13
  %43 = icmp eq i32 %42, 0
  br i1 %43, label %44, label %46

44:                                               ; preds = %41
  %45 = load ptr, ptr %9, align 8, !tbaa !5
  store ptr %45, ptr %8, align 8, !tbaa !5
  store i32 2, ptr %10, align 4
  br label %55

46:                                               ; preds = %41
  %47 = load i32, ptr %11, align 4, !tbaa !13
  %48 = load i32, ptr %12, align 4, !tbaa !13
  %49 = icmp slt i32 %47, %48
  br i1 %49, label %50, label %52

50:                                               ; preds = %46
  %51 = load ptr, ptr %9, align 8, !tbaa !5
  store ptr %51, ptr %8, align 8, !tbaa !5
  br label %52

52:                                               ; preds = %50, %46
  br label %53

53:                                               ; preds = %52
  br label %54

54:                                               ; preds = %53, %39
  store i32 0, ptr %10, align 4
  br label %55

55:                                               ; preds = %54, %44
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  %56 = load i32, ptr %10, align 4
  switch i32 %56, label %70 [
    i32 0, label %57
    i32 2, label %63
  ]

57:                                               ; preds = %55
  br label %58

58:                                               ; preds = %57
  %59 = load ptr, ptr %9, align 8, !tbaa !5
  %60 = getelementptr inbounds %struct.evthr, ptr %59, i32 0, i32 14
  %61 = getelementptr inbounds %struct.anon, ptr %60, i32 0, i32 0
  %62 = load ptr, ptr %61, align 8, !tbaa !14
  store ptr %62, ptr %9, align 8, !tbaa !5
  br label %25, !llvm.loop !17

63:                                               ; preds = %55, %25
  %64 = load ptr, ptr %8, align 8, !tbaa !5
  %65 = load ptr, ptr %6, align 8, !tbaa !5
  %66 = load ptr, ptr %7, align 8, !tbaa !5
  %67 = call i32 @evthr_defer(ptr noundef %64, ptr noundef %65, ptr noundef %66)
  store i32 %67, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %68

68:                                               ; preds = %63, %19, %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %69 = load i32, ptr %4, align 4
  ret i32 %69

70:                                               ; preds = %55
  unreachable
}

attributes #0 = { inlinehint 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"evthr_pool", !11, i64 0, !12, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!"evthr_pool_slist", !6, i64 0, !6, i64 8}
!13 = !{!11, !11, i64 0}
!14 = !{!15, !6, i64 192}
!15 = !{!"evthr", !11, i64 0, !11, i64 4, !11, i64 8, !11, i64 12, !7, i64 16, !6, i64 24, !6, i64 32, !7, i64 40, !7, i64 80, !7, i64 120, !6, i64 160, !6, i64 168, !6, i64 176, !6, i64 184, !16, i64 192}
!16 = !{!"", !6, i64 0, !6, i64 8}
!17 = distinct !{!17, !18}
!18 = !{!"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"

; Function Attrs: inlinehint nounwind uwtable
declare dso_local i32 @evthr_get_backlog(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @evthr_defer(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @evthr_pool_defer(ptr noundef readonly %0, ptr noundef %1, ptr noundef %2) local_unnamed_addr #1 {
  %4 = icmp eq ptr %0, null
  br i1 %4, label %17, label %5

5:                                                ; preds = %3
  %6 = icmp eq ptr %1, null
  br i1 %6, label %17, label %7

7:                                                ; preds = %5
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  %.02033 = load ptr, ptr %8, align 8, !tbaa !5
  %.not34 = icmp eq ptr %.02033, null
  br i1 %.not34, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %7, %.thread
  %.02036 = phi ptr [ %.020, %.thread ], [ %.02033, %7 ]
  %.02135 = phi ptr [ %.2.ph, %.thread ], [ null, %7 ]
  %9 = tail call i32 @evthr_get_backlog(ptr noundef nonnull %.02036)
  %.not26 = icmp eq ptr %.02135, null
  br i1 %.not26, label %.thread, label %10

10:                                               ; preds = %.lr.ph
  %11 = tail call i32 @evthr_get_backlog(ptr noundef nonnull %.02135)
  %12 = icmp eq i32 %9, 0
  br i1 %12, label %._crit_edge, label %13

13:                                               ; preds = %10
  %14 = icmp slt i32 %9, %11
  %spec.select = select i1 %14, ptr %.02036, ptr %.02135
  br label %.thread

.thread:                                          ; preds = %.lr.ph, %13
  %.2.ph = phi ptr [ %spec.select, %13 ], [ %.02036, %.lr.ph ]
  %15 = getelementptr inbounds i8, ptr %.02036, i64 192
  %.020 = load ptr, ptr %15, align 8, !tbaa !5
  %.not = icmp eq ptr %.020, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.thread, %10, %7
  %.3 = phi ptr [ null, %7 ], [ %.02036, %10 ], [ %.2.ph, %.thread ]
  %16 = tail call i32 @evthr_defer(ptr noundef %.3, ptr noundef nonnull %1, ptr noundef %2)
  br label %17

17:                                               ; preds = %5, %3, %._crit_edge
  %.022 = phi i32 [ %16, %._crit_edge ], [ 4, %3 ], [ 3, %5 ]
  ret i32 %.022
}

attributes #0 = { inlinehint 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 #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" }

!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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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