; LLVM IR from DionysiosB/CodeForces :: 0800-0899 (811A-VladikAndCourtesy)

; 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 [8 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [7 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
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 1, ptr %4, align 8, !tbaa !5
  br label %6

6:                                                ; preds = %26, %0
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = icmp sge i64 %7, 0
  br i1 %8, label %9, label %12

9:                                                ; preds = %6
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = icmp sge i64 %10, 0
  br label %12

12:                                               ; preds = %9, %6
  %13 = phi i1 [ false, %6 ], [ %11, %9 ]
  br i1 %13, label %14, label %29

14:                                               ; preds = %12
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = and i64 %15, 1
  %17 = icmp ne i64 %16, 0
  br i1 %17, label %18, label %22

18:                                               ; preds = %14
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = load i64, ptr %2, align 8, !tbaa !5
  %21 = sub nsw i64 %20, %19
  store i64 %21, ptr %2, align 8, !tbaa !5
  br label %26

22:                                               ; preds = %14
  %23 = load i64, ptr %4, align 8, !tbaa !5
  %24 = load i64, ptr %3, align 8, !tbaa !5
  %25 = sub nsw i64 %24, %23
  store i64 %25, ptr %3, align 8, !tbaa !5
  br label %26

26:                                               ; preds = %22, %18
  %27 = load i64, ptr %4, align 8, !tbaa !5
  %28 = add nsw i64 %27, 1
  store i64 %28, ptr %4, align 8, !tbaa !5
  br label %6, !llvm.loop !9

29:                                               ; preds = %12
  %30 = load i64, ptr %2, align 8, !tbaa !5
  %31 = icmp slt i64 %30, 0
  br i1 %31, label %32, label %33

32:                                               ; preds = %29
  br label %34

33:                                               ; preds = %29
  br label %34

34:                                               ; preds = %33, %32
  %35 = phi ptr [ @.str.1, %32 ], [ @.str.2, %33 ]
  %36 = getelementptr inbounds [7 x i8], ptr %35, i64 0, i64 0
  %37 = call i32 @puts(ptr noundef %36)
  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 @puts(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", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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 [8 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [7 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
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2)
  %.promoted = load i64, ptr %1, align 8, !tbaa !5
  %.promoted6 = load i64, ptr %2, align 8
  %4 = icmp sgt i64 %.promoted, -1
  %5 = icmp sgt i64 %.promoted6, -1
  %6 = select i1 %4, i1 %5, i1 false
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %14
  %.07 = phi i64 [ %17, %14 ], [ 1, %0 ]
  %7 = phi i64 [ %16, %14 ], [ %.promoted, %0 ]
  %8 = phi i64 [ %15, %14 ], [ %.promoted6, %0 ]
  %9 = and i64 %.07, 1
  %.not = icmp eq i64 %9, 0
  br i1 %.not, label %12, label %10

10:                                               ; preds = %.lr.ph
  %11 = sub nsw i64 %7, %.07
  store i64 %11, ptr %1, align 8, !tbaa !5
  br label %14

12:                                               ; preds = %.lr.ph
  %13 = sub nsw i64 %8, %.07
  store i64 %13, ptr %2, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %12, %10
  %15 = phi i64 [ %13, %12 ], [ %8, %10 ]
  %16 = phi i64 [ %7, %12 ], [ %11, %10 ]
  %17 = add nuw nsw i64 %.07, 1
  %18 = icmp sgt i64 %16, -1
  %19 = icmp sgt i64 %15, -1
  %20 = select i1 %18, i1 %19, i1 false
  br i1 %20, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %14, %0
  %.lcssa = phi i64 [ %.promoted, %0 ], [ %16, %14 ]
  %21 = icmp slt i64 %.lcssa, 0
  %.str.1..str.2 = select i1 %21, ptr @.str.1, ptr @.str.2
  %22 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %.str.1..str.2)
  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 @puts(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,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass