; LLVM IR from DionysiosB/CodeForces :: 1701A-GrassField (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 [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 i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %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
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %10

10:                                               ; preds = %45, %0
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = add nsw i64 %11, -1
  store i64 %12, ptr %2, align 8, !tbaa !5
  %13 = icmp ne i64 %11, 0
  br i1 %13, label %14, label %48

14:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  store i64 0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %33, %14
  %16 = load i32, ptr %4, align 4, !tbaa !9
  %17 = icmp slt i32 %16, 2
  br i1 %17, label %19, label %18

18:                                               ; preds = %15
  store i32 4, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %36

19:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %20

20:                                               ; preds = %29, %19
  %21 = load i32, ptr %6, align 4, !tbaa !9
  %22 = icmp slt i32 %21, 2
  br i1 %22, label %24, label %23

23:                                               ; preds = %20
  store i32 7, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %32

24:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %25 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %7)
  %26 = load i64, ptr %7, align 8, !tbaa !5
  %27 = load i64, ptr %3, align 8, !tbaa !5
  %28 = add nsw i64 %27, %26
  store i64 %28, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %29

29:                                               ; preds = %24
  %30 = load i32, ptr %6, align 4, !tbaa !9
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %6, align 4, !tbaa !9
  br label %20, !llvm.loop !11

32:                                               ; preds = %23
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %4, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %4, align 4, !tbaa !9
  br label %15, !llvm.loop !13

36:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 0, ptr %8, align 8, !tbaa !5
  %37 = load i64, ptr %3, align 8, !tbaa !5
  %38 = icmp eq i64 %37, 4
  br i1 %38, label %39, label %40

39:                                               ; preds = %36
  store i64 2, ptr %8, align 8, !tbaa !5
  br label %45

40:                                               ; preds = %36
  %41 = load i64, ptr %3, align 8, !tbaa !5
  %42 = icmp sgt i64 %41, 0
  br i1 %42, label %43, label %44

43:                                               ; preds = %40
  store i64 1, ptr %8, align 8, !tbaa !5
  br label %44

44:                                               ; preds = %43, %40
  br label %45

45:                                               ; preds = %44, %39
  %46 = load i64, ptr %8, align 8, !tbaa !5
  %47 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %46)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %10, !llvm.loop !14

48:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %49 = load i32, ptr %1, align 4
  ret i32 %49
}

; 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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !12}


; 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
  %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
  %.not17 = icmp eq i64 %4, 0
  br i1 %.not17, label %._crit_edge, label %.preheader12

.preheader12:                                     ; preds = %0, %.preheader12
  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)
  %7 = load i64, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = add nsw i64 %9, %7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = add nsw i64 %12, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %15 = load i64, ptr %2, align 8, !tbaa !5
  %16 = add nsw i64 %15, %13
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %17 = icmp eq i64 %16, 4
  %18 = icmp sgt i64 %16, 0
  %spec.select = zext i1 %18 to i64
  %.0 = select i1 %17, i64 2, i64 %spec.select
  %19 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.0)
  %20 = load i64, ptr %1, align 8, !tbaa !5
  %21 = add nsw i64 %20, -1
  store i64 %21, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %20, 0
  br i1 %.not, label %._crit_edge, label %.preheader12, !llvm.loop !9

._crit_edge:                                      ; preds = %.preheader12, %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 @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: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass