; LLVM IR from DionysiosB/CodeForces :: 1851A-EscalatorConversations (main)

; 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 [16 x i8], align 1
@.str.2 = 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
  %9 = alloca i32, align 4
  %10 = alloca i64, align 8
  %11 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %13

13:                                               ; preds = %58, %0
  %14 = load i64, ptr %2, align 8, !tbaa !5
  %15 = add nsw i64 %14, -1
  store i64 %15, ptr %2, align 8, !tbaa !5
  %16 = icmp ne i64 %14, 0
  br i1 %16, label %17, label %61

17:                                               ; preds = %13
  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
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %18 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4, ptr noundef %5, ptr noundef %6)
  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 0, ptr %8, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %55, %17
  %20 = load i64, ptr %8, align 8, !tbaa !5
  %21 = load i64, ptr %3, align 8, !tbaa !5
  %22 = icmp slt i64 %20, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %19
  store i32 4, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %58

24:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  %25 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %10)
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  %26 = load i64, ptr %6, align 8, !tbaa !5
  %27 = load i64, ptr %10, align 8, !tbaa !5
  %28 = sub nsw i64 %26, %27
  store i64 %28, ptr %11, align 8, !tbaa !5
  %29 = load i64, ptr %11, align 8, !tbaa !5
  %30 = icmp ne i64 %29, 0
  br i1 %30, label %31, label %36

31:                                               ; preds = %24
  %32 = load i64, ptr %11, align 8, !tbaa !5
  %33 = load i64, ptr %5, align 8, !tbaa !5
  %34 = srem i64 %32, %33
  %35 = icmp ne i64 %34, 0
  br i1 %35, label %36, label %37

36:                                               ; preds = %31, %24
  store i32 6, ptr %9, align 4
  br label %52

37:                                               ; preds = %31
  %38 = load i64, ptr %11, align 8, !tbaa !5
  %39 = icmp slt i64 %38, 0
  br i1 %39, label %40, label %43

40:                                               ; preds = %37
  %41 = load i64, ptr %11, align 8, !tbaa !5
  %42 = sub nsw i64 0, %41
  store i64 %42, ptr %11, align 8, !tbaa !5
  br label %43

43:                                               ; preds = %40, %37
  %44 = load i64, ptr %11, align 8, !tbaa !5
  %45 = load i64, ptr %4, align 8, !tbaa !5
  %46 = load i64, ptr %5, align 8, !tbaa !5
  %47 = mul nsw i64 %45, %46
  %48 = icmp slt i64 %44, %47
  %49 = zext i1 %48 to i64
  %50 = load i64, ptr %7, align 8, !tbaa !5
  %51 = add nsw i64 %50, %49
  store i64 %51, ptr %7, align 8, !tbaa !5
  store i32 0, ptr %9, align 4
  br label %52

52:                                               ; preds = %43, %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  %53 = load i32, ptr %9, align 4
  switch i32 %53, label %63 [
    i32 0, label %54
    i32 6, label %55
  ]

54:                                               ; preds = %52
  br label %55

55:                                               ; preds = %54, %52
  %56 = load i64, ptr %8, align 8, !tbaa !5
  %57 = add nsw i64 %56, 1
  store i64 %57, ptr %8, align 8, !tbaa !5
  br label %19, !llvm.loop !9

58:                                               ; preds = %23
  %59 = load i64, ptr %7, align 8, !tbaa !5
  %60 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %59)
  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
  br label %13, !llvm.loop !11

61:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %62 = load i32, ptr %1, align 4
  ret i32 %62

63:                                               ; preds = %52
  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 [16 x i8], align 1
@.str.2 = 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
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %8 = load i64, ptr %1, align 8, !tbaa !5
  %9 = add nsw i64 %8, -1
  store i64 %9, ptr %1, align 8, !tbaa !5
  %.not17 = icmp eq i64 %8, 0
  br i1 %.not17, label %._crit_edge20, label %.lr.ph19

.lr.ph19:                                         ; preds = %0, %._crit_edge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #4
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3, ptr noundef nonnull %4, ptr noundef nonnull %5)
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = icmp sgt i64 %11, 0
  br i1 %12, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %29, %.lr.ph19
  %.011.lcssa = phi i64 [ 0, %.lr.ph19 ], [ %.1, %29 ]
  %13 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.011.lcssa)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %14 = load i64, ptr %1, align 8, !tbaa !5
  %15 = add nsw i64 %14, -1
  store i64 %15, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %14, 0
  br i1 %.not, label %._crit_edge20, label %.lr.ph19, !llvm.loop !9

.lr.ph:                                           ; preds = %.lr.ph19, %29
  %.01016 = phi i64 [ %30, %29 ], [ 0, %.lr.ph19 ]
  %.01115 = phi i64 [ %.1, %29 ], [ 0, %.lr.ph19 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #4
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %6)
  %17 = load i64, ptr %5, align 8, !tbaa !5
  %18 = load i64, ptr %6, align 8, !tbaa !5
  %19 = sub nsw i64 %17, %18
  %.not13 = icmp eq i64 %17, %18
  br i1 %.not13, label %29, label %20

20:                                               ; preds = %.lr.ph
  %21 = load i64, ptr %4, align 8, !tbaa !5
  %22 = srem i64 %19, %21
  %.not14 = icmp eq i64 %22, 0
  br i1 %.not14, label %23, label %29

23:                                               ; preds = %20
  %spec.select = call i64 @llvm.abs.i64(i64 %19, i1 true)
  %24 = load i64, ptr %3, align 8, !tbaa !5
  %25 = mul nsw i64 %24, %21
  %26 = icmp slt i64 %spec.select, %25
  %27 = zext i1 %26 to i64
  %28 = add nsw i64 %.01115, %27
  br label %29

29:                                               ; preds = %.lr.ph, %20, %23
  %.1 = phi i64 [ %28, %23 ], [ %.01115, %20 ], [ %.01115, %.lr.ph ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #4
  %30 = add nuw nsw i64 %.01016, 1
  %31 = load i64, ptr %2, align 8, !tbaa !5
  %32 = icmp slt i64 %30, %31
  br i1 %32, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge20:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #4
  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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.abs.i64(i64, i1 immarg) #3

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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}


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