; LLVM IR from DionysiosB/CodeForces :: 1100-1199 (1183A-NearestInterestingNumber)

; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %7

7:                                                ; preds = %31, %0
  br label %8

8:                                                ; preds = %7
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %9 = load i64, ptr %2, align 8, !tbaa !5
  store i64 %9, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %13, %8
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = icmp sgt i64 %11, 0
  br i1 %12, label %13, label %20

13:                                               ; preds = %10
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = srem i64 %14, 10
  %16 = load i64, ptr %4, align 8, !tbaa !5
  %17 = add nsw i64 %16, %15
  store i64 %17, ptr %4, align 8, !tbaa !5
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = sdiv i64 %18, 10
  store i64 %19, ptr %3, align 8, !tbaa !5
  br label %10, !llvm.loop !9

20:                                               ; preds = %10
  %21 = load i64, ptr %4, align 8, !tbaa !5
  %22 = srem i64 %21, 4
  %23 = icmp eq i64 %22, 0
  br i1 %23, label %24, label %25

24:                                               ; preds = %20
  store i32 3, ptr %5, align 4
  br label %29

25:                                               ; preds = %20
  %26 = load i64, ptr %2, align 8, !tbaa !5
  %27 = add nsw i64 %26, 1
  store i64 %27, ptr %2, align 8, !tbaa !5
  br label %28

28:                                               ; preds = %25
  store i32 0, ptr %5, align 4
  br label %29

29:                                               ; preds = %28, %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  %30 = load i32, ptr %5, align 4
  switch i32 %30, label %36 [
    i32 0, label %31
    i32 3, label %32
  ]

31:                                               ; preds = %29
  br label %7, !llvm.loop !11

32:                                               ; preds = %29
  %33 = load i64, ptr %2, align 8, !tbaa !5
  %34 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %33)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %35 = load i32, ptr %1, align 4
  ret i32 %35

36:                                               ; preds = %29
  unreachable
}

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

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

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

declare i32 @printf(ptr noundef, ...) #2

attributes #0 = { mustprogress norecurse 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 = { "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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %.promoted = load i64, ptr %1, align 8, !tbaa !5
  %3 = icmp sgt i64 %.promoted, 0
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge.thread

.lr.ph.preheader:                                 ; preds = %0, %10
  %4 = phi i64 [ %11, %10 ], [ %.promoted, %0 ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.0712 = phi i64 [ %6, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %.0811 = phi i64 [ %7, %.lr.ph ], [ %4, %.lr.ph.preheader ]
  %5 = urem i64 %.0811, 10
  %6 = add nuw nsw i64 %.0712, %5
  %7 = udiv i64 %.0811, 10
  %.not = icmp ult i64 %.0811, 10
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph
  %8 = and i64 %6, 3
  %9 = icmp eq i64 %8, 0
  br i1 %9, label %._crit_edge.thread, label %10

10:                                               ; preds = %._crit_edge
  %11 = add nuw nsw i64 %4, 1
  store i64 %11, ptr %1, align 8, !tbaa !5
  br label %.lr.ph.preheader

._crit_edge.thread:                               ; preds = %._crit_edge, %0
  %.lcssa15 = phi i64 [ %.promoted, %0 ], [ %4, %._crit_edge ]
  %12 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.lcssa15)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  ret i32 0
}

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

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

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

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

attributes #0 = { mustprogress nofree norecurse 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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