; LLVM IR from DionysiosB/CodeForces :: 0400-0499 (483B-FriendsAndPresents)

; 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 [17 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 i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2, ptr noundef %3, ptr noundef %4, ptr noundef %5)
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 0, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 0, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 2000000000, ptr %8, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %51, %0
  %11 = load i64, ptr %6, align 8, !tbaa !5
  %12 = load i64, ptr %8, align 8, !tbaa !5
  %13 = icmp slt i64 %11, %12
  br i1 %13, label %14, label %52

14:                                               ; preds = %10
  %15 = load i64, ptr %6, align 8, !tbaa !5
  %16 = load i64, ptr %8, align 8, !tbaa !5
  %17 = add nsw i64 %15, %16
  %18 = sdiv i64 %17, 2
  store i64 %18, ptr %7, align 8, !tbaa !5
  %19 = load i64, ptr %7, align 8, !tbaa !5
  %20 = load i64, ptr %7, align 8, !tbaa !5
  %21 = load i64, ptr %4, align 8, !tbaa !9
  %22 = sdiv i64 %20, %21
  %23 = sub nsw i64 %19, %22
  %24 = load i64, ptr %2, align 8, !tbaa !9
  %25 = icmp sge i64 %23, %24
  br i1 %25, label %26, label %48

26:                                               ; preds = %14
  %27 = load i64, ptr %7, align 8, !tbaa !5
  %28 = load i64, ptr %7, align 8, !tbaa !5
  %29 = load i64, ptr %5, align 8, !tbaa !9
  %30 = sdiv i64 %28, %29
  %31 = sub nsw i64 %27, %30
  %32 = load i64, ptr %3, align 8, !tbaa !9
  %33 = icmp sge i64 %31, %32
  br i1 %33, label %34, label %48

34:                                               ; preds = %26
  %35 = load i64, ptr %7, align 8, !tbaa !5
  %36 = load i64, ptr %7, align 8, !tbaa !5
  %37 = load i64, ptr %4, align 8, !tbaa !9
  %38 = load i64, ptr %5, align 8, !tbaa !9
  %39 = mul nsw i64 %37, %38
  %40 = sdiv i64 %36, %39
  %41 = sub nsw i64 %35, %40
  %42 = load i64, ptr %2, align 8, !tbaa !9
  %43 = load i64, ptr %3, align 8, !tbaa !9
  %44 = add nsw i64 %42, %43
  %45 = icmp sge i64 %41, %44
  br i1 %45, label %46, label %48

46:                                               ; preds = %34
  %47 = load i64, ptr %7, align 8, !tbaa !5
  store i64 %47, ptr %8, align 8, !tbaa !5
  br label %51

48:                                               ; preds = %34, %26, %14
  %49 = load i64, ptr %7, align 8, !tbaa !5
  %50 = add nsw i64 %49, 1
  store i64 %50, ptr %6, align 8, !tbaa !5
  br label %51

51:                                               ; preds = %48, %46
  br label %10, !llvm.loop !11

52:                                               ; preds = %10
  %53 = load i64, ptr %8, align 8, !tbaa !5
  %54 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %53)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  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 = !{!10, !10, i64 0}
!10 = !{!"long", !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"

@.str = external hidden unnamed_addr constant [17 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
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2, ptr noundef nonnull %3, ptr noundef nonnull %4)
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = load i64, ptr %1, align 8, !tbaa !5
  %8 = load i64, ptr %4, align 8
  %9 = load i64, ptr %2, align 8
  %10 = mul nsw i64 %8, %6
  %11 = add nsw i64 %9, %7
  br label %12

12:                                               ; preds = %0, %25
  %.020 = phi i64 [ 2000000000, %0 ], [ %.1, %25 ]
  %.01319 = phi i64 [ 0, %0 ], [ %.114, %25 ]
  %13 = add nsw i64 %.020, %.01319
  %14 = sdiv i64 %13, 2
  %15 = sdiv i64 %14, %6
  %16 = sub nsw i64 %14, %15
  %.not = icmp slt i64 %16, %7
  br i1 %.not, label %23, label %17

17:                                               ; preds = %12
  %18 = sdiv i64 %14, %8
  %19 = sub nsw i64 %14, %18
  %.not17 = icmp slt i64 %19, %9
  br i1 %.not17, label %23, label %20

20:                                               ; preds = %17
  %21 = sdiv i64 %14, %10
  %22 = sub nsw i64 %14, %21
  %.not18 = icmp slt i64 %22, %11
  br i1 %.not18, label %23, label %25

23:                                               ; preds = %20, %17, %12
  %24 = add nsw i64 %14, 1
  br label %25

25:                                               ; preds = %20, %23
  %.114 = phi i64 [ %24, %23 ], [ %.01319, %20 ]
  %.1 = phi i64 [ %.020, %23 ], [ %14, %20 ]
  %26 = icmp slt i64 %.114, %.1
  br i1 %26, label %12, label %27, !llvm.loop !9

27:                                               ; preds = %25
  %28 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.1)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  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", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass