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

; 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.XTopStats = type { i32, %struct.XSyncMutex, %struct.XCPUStats, %struct.XMemInfo, i32, %struct.XArray_, %struct.XTask, i32 }
%struct.XSyncMutex = type { %union.pthread_mutex_t, i8 }
%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.XCPUStats = type { [3 x i32], i16, %struct.XProcInfo, %struct.XCPUInfo, %struct.XArray_ }
%struct.XProcInfo = type { i32, i32, i64, i64, i64, i64, i64 }
%struct.XCPUInfo = type { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i64 }
%struct.XMemInfo = type { i64, i64, i64, i64, i64, i64, i64, i64, i64, i64, i64, i64 }
%struct.XArray_ = type { ptr, ptr, i32, ptr, i8, i8, i8, i64, i64 }
%struct.XTask = type { ptr, ptr, %struct.XThread, i32, i32, i32 }
%struct.XThread = type { ptr, ptr, i64, i32, i8, i8 }

; 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 i32 @XMon_WaitLoad(ptr noundef %0, i32 noundef %1) #1 {
  %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) #3
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %16, %15, %2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.XTopStats, ptr %7, i32 0, i32 4
  %9 = atomicrmw add ptr %8, i32 0 seq_cst, align 8
  %10 = add i32 %9, 0
  %11 = icmp ne i32 %10, 1
  br i1 %11, label %12, label %20

12:                                               ; preds = %6
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = icmp ne i32 %13, 0
  br i1 %14, label %16, label %15

15:                                               ; preds = %12
  br label %6, !llvm.loop !11

16:                                               ; preds = %12
  %17 = load i32, ptr %4, align 4, !tbaa !9
  call void @xusleep(i32 noundef %17)
  %18 = load i32, ptr %5, align 4, !tbaa !9
  %19 = add i32 %18, 1
  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
  %22 = load i32, ptr %4, align 4, !tbaa !9
  %23 = mul i32 %21, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret i32 %23
}

declare void @xusleep(i32 noundef) #2

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 = { "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, !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
define dso_local i32 @XMon_WaitLoad(ptr nocapture noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 368
  %.not6 = icmp eq i32 %1, 0
  br i1 %.not6, label %.outer.split.us, label %.outer.split.lr.ph, !llvm.loop !5

.outer.split.lr.ph:                               ; preds = %2
  %4 = atomicrmw or ptr %3, i32 0 seq_cst, align 8
  %.not18 = icmp eq i32 %4, 1
  br i1 %.not18, label %.split.us, label %.outer

.outer.split.us:                                  ; preds = %2, %.outer.split.us
  %5 = atomicrmw or ptr %3, i32 0 seq_cst, align 8
  %.not.us = icmp eq i32 %5, 1
  br i1 %.not.us, label %.split.us, label %.outer.split.us

.outer:                                           ; preds = %.outer.split.lr.ph, %.outer
  %.0.ph1019 = phi i32 [ %6, %.outer ], [ 0, %.outer.split.lr.ph ]
  tail call void @xusleep(i32 noundef %1) #2
  %6 = add i32 %.0.ph1019, 1
  %7 = atomicrmw or ptr %3, i32 0 seq_cst, align 8
  %.not = icmp eq i32 %7, 1
  br i1 %.not, label %.split.us, label %.outer

.split.us:                                        ; preds = %.outer, %.outer.split.us, %.outer.split.lr.ph
  %.us-phi = phi i32 [ 0, %.outer.split.lr.ph ], [ 0, %.outer.split.us ], [ %6, %.outer ]
  %8 = mul i32 %.us-phi, %1
  ret i32 %8
}

declare void @xusleep(i32 noundef) local_unnamed_addr #1

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


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