; LLVM IR from kala13x/libxutils :: src/sys (sync)

; 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: nounwind uwtable
declare dso_local void @xusleep(i32 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 zeroext i8 @XSyncBar_CheckAck(ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @XSyncBar_WaitAck(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %16, %2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = call zeroext i8 @XSyncBar_CheckAck(ptr noundef %7)
  %9 = icmp ne i8 %8, 0
  %10 = xor i1 %9, true
  br i1 %10, label %11, label %20

11:                                               ; preds = %6
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %14, label %16

14:                                               ; preds = %11
  %15 = load i32, ptr %4, align 4, !tbaa !9
  call void @xusleep(i32 noundef %15)
  br label %16

16:                                               ; preds = %14, %11
  %17 = load i32, ptr %4, align 4, !tbaa !9
  %18 = load i32, ptr %5, align 4, !tbaa !9
  %19 = add i32 %18, %17
  store i32 %19, ptr %5, align 4, !tbaa !9
  br label %6, !llvm.loop !11

20:                                               ; preds = %6
  %21 = load i32, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %21
}

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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: nounwind uwtable
declare dso_local void @xusleep(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local zeroext i8 @XSyncBar_CheckAck(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @XSyncBar_WaitAck(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call zeroext i8 @XSyncBar_CheckAck(ptr noundef %0)
  %.not7 = icmp eq i8 %3, 0
  br i1 %.not7, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2
  %.not6 = icmp eq i32 %1, 0
  br i1 %.not6, label %.lr.ph.split.us, label %.lr.ph.split

.lr.ph.split.us:                                  ; preds = %.lr.ph, %.lr.ph.split.us
  %4 = tail call zeroext i8 @XSyncBar_CheckAck(ptr noundef %0)
  %.not.us = icmp eq i8 %4, 0
  br i1 %.not.us, label %.lr.ph.split.us, label %._crit_edge, !llvm.loop !5

.lr.ph.split:                                     ; preds = %.lr.ph, %.lr.ph.split
  %.08 = phi i32 [ %5, %.lr.ph.split ], [ 0, %.lr.ph ]
  tail call void @xusleep(i32 noundef %1)
  %5 = add i32 %.08, %1
  %6 = tail call zeroext i8 @XSyncBar_CheckAck(ptr noundef %0)
  %.not = icmp eq i8 %6, 0
  br i1 %.not, label %.lr.ph.split, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph.split, %.lr.ph.split.us, %2
  %.0.lcssa = phi i32 [ 0, %2 ], [ 0, %.lr.ph.split.us ], [ %5, %.lr.ph.split ]
  ret i32 %.0.lcssa
}

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"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass