; LLVM IR from DionysiosB/CodeForces :: 1808A-LuckyNumbers.ll (Z5checkl)

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z5checkl(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i64 %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 9, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %31, %1
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = icmp ne i64 %7, 0
  br i1 %8, label %9, label %33

9:                                                ; preds = %6
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = srem i64 %10, 10
  %12 = trunc i64 %11 to i32
  store i32 %12, ptr %5, align 4, !tbaa !9
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %14 = sdiv i64 %13, 10
  store i64 %14, ptr %2, align 8, !tbaa !5
  %15 = load i32, ptr %3, align 4, !tbaa !9
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %18, label %20

18:                                               ; preds = %9
  %19 = load i32, ptr %3, align 4, !tbaa !9
  br label %22

20:                                               ; preds = %9
  %21 = load i32, ptr %5, align 4, !tbaa !9
  br label %22

22:                                               ; preds = %20, %18
  %23 = phi i32 [ %19, %18 ], [ %21, %20 ]
  store i32 %23, ptr %3, align 4, !tbaa !9
  %24 = load i32, ptr %4, align 4, !tbaa !9
  %25 = load i32, ptr %5, align 4, !tbaa !9
  %26 = icmp sgt i32 %24, %25
  br i1 %26, label %27, label %29

27:                                               ; preds = %22
  %28 = load i32, ptr %4, align 4, !tbaa !9
  br label %31

29:                                               ; preds = %22
  %30 = load i32, ptr %5, align 4, !tbaa !9
  br label %31

31:                                               ; preds = %29, %27
  %32 = phi i32 [ %28, %27 ], [ %30, %29 ]
  store i32 %32, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %6, !llvm.loop !11

33:                                               ; preds = %6
  %34 = load i32, ptr %4, align 4, !tbaa !9
  %35 = load i32, ptr %3, align 4, !tbaa !9
  %36 = sub nsw i32 %34, %35
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %36
}

; 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

attributes #0 = { mustprogress 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple 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: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef range(i32 -18, 19) i32 @_Z5checkl(i64 noundef %0) local_unnamed_addr #0 {
  %.not15 = icmp eq i64 %0, 0
  br i1 %.not15, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.018 = phi i64 [ %4, %.lr.ph ], [ %0, %1 ]
  %.01317 = phi i32 [ %6, %.lr.ph ], [ 0, %1 ]
  %.01416 = phi i32 [ %5, %.lr.ph ], [ 9, %1 ]
  %2 = srem i64 %.018, 10
  %3 = trunc nsw i64 %2 to i32
  %4 = sdiv i64 %.018, 10
  %5 = tail call i32 @llvm.smin.i32(i32 %.01416, i32 %3)
  %6 = tail call i32 @llvm.smax.i32(i32 %.01317, i32 %3)
  %.018.off = add i64 %.018, 9
  %.not = icmp ult i64 %.018.off, 19
  br i1 %.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !5

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %7 = sub nsw i32 %6, %5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %1
  %8 = phi i32 [ -9, %1 ], [ %7, %._crit_edge.loopexit ]
  ret i32 %8
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) 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 speculatable willreturn memory(none) }

!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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass