; LLVM IR from DionysiosB/CodeForces :: 1100-1199 (1176A-DivideIt)

; 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 [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 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
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %6

6:                                                ; preds = %46, %0
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = add nsw i64 %7, -1
  store i64 %8, ptr %2, align 8, !tbaa !5
  %9 = icmp ne i64 %7, 0
  br i1 %9, label %10, label %49

10:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %45, %10
  %13 = load i64, ptr %3, align 8, !tbaa !5
  %14 = icmp sgt i64 %13, 1
  br i1 %14, label %15, label %46

15:                                               ; preds = %12
  %16 = load i64, ptr %3, align 8, !tbaa !5
  %17 = srem i64 %16, 2
  %18 = icmp eq i64 %17, 0
  br i1 %18, label %19, label %24

19:                                               ; preds = %15
  %20 = load i64, ptr %3, align 8, !tbaa !5
  %21 = sdiv i64 %20, 2
  store i64 %21, ptr %3, align 8, !tbaa !5
  %22 = load i64, ptr %4, align 8, !tbaa !5
  %23 = add nsw i64 %22, 1
  store i64 %23, ptr %4, align 8, !tbaa !5
  br label %45

24:                                               ; preds = %15
  %25 = load i64, ptr %3, align 8, !tbaa !5
  %26 = srem i64 %25, 3
  %27 = icmp eq i64 %26, 0
  br i1 %27, label %28, label %33

28:                                               ; preds = %24
  %29 = load i64, ptr %3, align 8, !tbaa !5
  %30 = sdiv i64 %29, 3
  store i64 %30, ptr %3, align 8, !tbaa !5
  %31 = load i64, ptr %4, align 8, !tbaa !5
  %32 = add nsw i64 %31, 2
  store i64 %32, ptr %4, align 8, !tbaa !5
  br label %44

33:                                               ; preds = %24
  %34 = load i64, ptr %3, align 8, !tbaa !5
  %35 = srem i64 %34, 5
  %36 = icmp eq i64 %35, 0
  br i1 %36, label %37, label %42

37:                                               ; preds = %33
  %38 = load i64, ptr %3, align 8, !tbaa !5
  %39 = sdiv i64 %38, 5
  store i64 %39, ptr %3, align 8, !tbaa !5
  %40 = load i64, ptr %4, align 8, !tbaa !5
  %41 = add nsw i64 %40, 3
  store i64 %41, ptr %4, align 8, !tbaa !5
  br label %43

42:                                               ; preds = %33
  store i64 -1, ptr %4, align 8, !tbaa !5
  br label %46

43:                                               ; preds = %37
  br label %44

44:                                               ; preds = %43, %28
  br label %45

45:                                               ; preds = %44, %19
  br label %12, !llvm.loop !9

46:                                               ; preds = %42, %12
  %47 = load i64, ptr %4, align 8, !tbaa !5
  %48 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %47)
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %6, !llvm.loop !11

49:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  ret i32 0
}

; 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

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

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

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 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 [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 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
  %2 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i64, ptr %1, align 8, !tbaa !5
  %5 = add nsw i64 %4, -1
  store i64 %5, ptr %1, align 8, !tbaa !5
  %.not8 = icmp eq i64 %4, 0
  br i1 %.not8, label %._crit_edge11, label %.lr.ph10

.lr.ph10:                                         ; preds = %0, %._crit_edge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %.promoted = load i64, ptr %2, align 8, !tbaa !5
  %7 = icmp sgt i64 %.promoted, 1
  br i1 %7, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph10, %23
  %.05 = phi i64 [ %25, %23 ], [ 0, %.lr.ph10 ]
  %8 = phi i64 [ %24, %23 ], [ %.promoted, %.lr.ph10 ]
  %9 = and i64 %8, 1
  %10 = icmp eq i64 %9, 0
  br i1 %10, label %11, label %13

11:                                               ; preds = %.lr.ph
  %12 = lshr exact i64 %8, 1
  store i64 %12, ptr %2, align 8, !tbaa !5
  br label %23

13:                                               ; preds = %.lr.ph
  %14 = urem i64 %8, 3
  %15 = udiv i64 %8, 3
  %16 = icmp eq i64 %14, 0
  br i1 %16, label %17, label %18

17:                                               ; preds = %13
  store i64 %15, ptr %2, align 8, !tbaa !5
  br label %23

18:                                               ; preds = %13
  %19 = urem i64 %8, 5
  %20 = udiv i64 %8, 5
  %21 = icmp eq i64 %19, 0
  br i1 %21, label %22, label %._crit_edge

22:                                               ; preds = %18
  store i64 %20, ptr %2, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %17, %22, %11
  %.sink = phi i64 [ 2, %17 ], [ 3, %22 ], [ 1, %11 ]
  %24 = phi i64 [ %15, %17 ], [ %20, %22 ], [ %12, %11 ]
  %25 = add nuw nsw i64 %.05, %.sink
  %26 = icmp ugt i64 %24, 1
  br i1 %26, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %23, %18, %.lr.ph10
  %.2 = phi i64 [ 0, %.lr.ph10 ], [ -1, %18 ], [ %25, %23 ]
  %27 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.2)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %28 = load i64, ptr %1, align 8, !tbaa !5
  %29 = add nsw i64 %28, -1
  store i64 %29, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %28, 0
  br i1 %.not, label %._crit_edge11, label %.lr.ph10, !llvm.loop !11

._crit_edge11:                                    ; preds = %._crit_edge, %0
  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: nofree nounwind
declare noundef i32 @printf(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

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 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}


; Effective O3 passes: DivRemPairsPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass