; LLVM IR from DionysiosB/CodeForces :: 1971C-ClockAndStrings (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 [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 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 i8, align 1
  %9 = alloca i8, align 1
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %11

11:                                               ; preds = %42, %0
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = add nsw i64 %12, -1
  store i64 %13, ptr %2, align 8, !tbaa !5
  %14 = icmp ne i64 %12, 0
  br i1 %14, label %15, label %56

15:                                               ; preds = %11
  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
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4, ptr noundef %5, ptr noundef %6)
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = icmp sgt i64 %17, %18
  br i1 %19, label %20, label %24

20:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %21 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %21, ptr %7, align 8, !tbaa !5
  %22 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %22, ptr %3, align 8, !tbaa !5
  %23 = load i64, ptr %7, align 8, !tbaa !5
  store i64 %23, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %24

24:                                               ; preds = %20, %15
  call void @llvm.lifetime.start.p0(i64 1, ptr %8) #3
  %25 = load i64, ptr %3, align 8, !tbaa !5
  %26 = load i64, ptr %5, align 8, !tbaa !5
  %27 = icmp sle i64 %25, %26
  br i1 %27, label %28, label %32

28:                                               ; preds = %24
  %29 = load i64, ptr %5, align 8, !tbaa !5
  %30 = load i64, ptr %4, align 8, !tbaa !5
  %31 = icmp sle i64 %29, %30
  br label %32

32:                                               ; preds = %28, %24
  %33 = phi i1 [ false, %24 ], [ %31, %28 ]
  %34 = zext i1 %33 to i8
  store i8 %34, ptr %8, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %9) #3
  %35 = load i64, ptr %3, align 8, !tbaa !5
  %36 = load i64, ptr %6, align 8, !tbaa !5
  %37 = icmp sle i64 %35, %36
  br i1 %37, label %38, label %42

38:                                               ; preds = %32
  %39 = load i64, ptr %6, align 8, !tbaa !5
  %40 = load i64, ptr %4, align 8, !tbaa !5
  %41 = icmp sle i64 %39, %40
  br label %42

42:                                               ; preds = %38, %32
  %43 = phi i1 [ false, %32 ], [ %41, %38 ]
  %44 = zext i1 %43 to i8
  store i8 %44, ptr %9, align 1, !tbaa !9
  %45 = load i8, ptr %8, align 1, !tbaa !9, !range !11, !noundef !12
  %46 = trunc i8 %45 to i1
  %47 = zext i1 %46 to i32
  %48 = load i8, ptr %9, align 1, !tbaa !9, !range !11, !noundef !12
  %49 = trunc i8 %48 to i1
  %50 = zext i1 %49 to i32
  %51 = xor i32 %47, %50
  %52 = icmp ne i32 %51, 0
  %53 = zext i1 %52 to i64
  %54 = select i1 %52, ptr @.str.2, ptr @.str.3
  %55 = call i32 @puts(ptr noundef %54)
  call void @llvm.lifetime.end.p0(i64 1, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #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 %11, !llvm.loop !13

56:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %57 = load i32, ptr %1, align 4
  ret i32 %57
}

; 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 @puts(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 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = distinct !{!13, !14}
!14 = !{!"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 [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 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
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %7 = load i64, ptr %1, align 8, !tbaa !5
  %8 = add nsw i64 %7, -1
  store i64 %8, ptr %1, align 8, !tbaa !5
  %.not5 = icmp eq i64 %7, 0
  br i1 %.not5, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %14
  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
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  %9 = 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)
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = load i64, ptr %3, align 8
  %12 = icmp sgt i64 %10, %11
  br i1 %12, label %13, label %14

13:                                               ; preds = %.lr.ph
  store i64 %11, ptr %2, align 8, !tbaa !5
  store i64 %10, ptr %3, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %13, %.lr.ph
  %15 = phi i64 [ %10, %13 ], [ %11, %.lr.ph ]
  %16 = phi i64 [ %11, %13 ], [ %10, %.lr.ph ]
  %17 = load i64, ptr %4, align 8
  %18 = icmp sle i64 %16, %17
  %19 = icmp sle i64 %17, %15
  %20 = and i1 %18, %19
  %21 = load i64, ptr %5, align 8
  %22 = icmp sle i64 %16, %21
  %23 = icmp sle i64 %21, %15
  %24 = and i1 %22, %23
  %25 = xor i1 %20, %24
  %26 = select i1 %25, ptr @.str.2, ptr @.str.3
  %27 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %26)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  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
  %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_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %14, %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: 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 @puts(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: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass