; LLVM IR from DionysiosB/CodeForces :: 0800-0899 (807A-IsItRated)

; 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 [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i8, align 1
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 -1, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %4) #3
  store i8 0, ptr %4, align 1, !tbaa !9
  br label %9

9:                                                ; preds = %32, %0
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = add nsw i32 %10, -1
  store i32 %11, ptr %2, align 4, !tbaa !5
  %12 = icmp ne i32 %10, 0
  br i1 %12, label %13, label %33

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %5, ptr noundef %6)
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = icmp ne i32 %15, %16
  br i1 %17, label %18, label %20

18:                                               ; preds = %13
  %19 = call i32 @puts(ptr noundef @.str.2)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %7, align 4
  br label %30

20:                                               ; preds = %13
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = icmp sge i32 %21, 0
  br i1 %22, label %23, label %28

23:                                               ; preds = %20
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = load i32, ptr %3, align 4, !tbaa !5
  %26 = icmp sgt i32 %24, %25
  br i1 %26, label %27, label %28

27:                                               ; preds = %23
  store i8 1, ptr %4, align 1, !tbaa !9
  br label %28

28:                                               ; preds = %27, %23, %20
  %29 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %29, ptr %3, align 4, !tbaa !5
  store i32 0, ptr %7, align 4
  br label %30

30:                                               ; preds = %28, %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  %31 = load i32, ptr %7, align 4
  switch i32 %31, label %39 [
    i32 0, label %32
  ]

32:                                               ; preds = %30
  br label %9, !llvm.loop !11

33:                                               ; preds = %9
  %34 = load i8, ptr %4, align 1, !tbaa !9, !range !13, !noundef !14
  %35 = trunc i8 %34 to i1
  %36 = zext i1 %35 to i64
  %37 = select i1 %35, ptr @.str.3, ptr @.str.4
  %38 = call i32 @puts(ptr noundef %37)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %7, align 4
  br label %39

39:                                               ; preds = %33, %30
  call void @llvm.lifetime.end.p0(i64 1, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  %40 = load i32, ptr %1, align 4
  ret i32 %40
}

; 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{i8 0, i8 2}
!14 = !{}


; 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 [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = add nsw i32 %5, -1
  store i32 %6, ptr %1, align 4, !tbaa !5
  %.not16 = icmp eq i32 %5, 0
  br i1 %.not16, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %11
  %.0518 = phi i1 [ %.1, %11 ], [ false, %0 ]
  %.0617 = phi i32 [ %8, %11 ], [ -1, %0 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %.not12 = icmp eq i32 %8, %9
  br i1 %.not12, label %11, label %.thread

.thread:                                          ; preds = %.lr.ph
  %10 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.2)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  br label %18

11:                                               ; preds = %.lr.ph
  %12 = icmp sgt i32 %.0617, -1
  %13 = icmp sgt i32 %8, %.0617
  %or.cond = and i1 %12, %13
  %.1 = select i1 %or.cond, i1 true, i1 %.0518
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  %14 = load i32, ptr %1, align 4, !tbaa !5
  %15 = add nsw i32 %14, -1
  store i32 %15, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %14, 0
  br i1 %.not, label %._crit_edge.loopexit, label %.lr.ph

._crit_edge.loopexit:                             ; preds = %11
  %16 = select i1 %.1, ptr @.str.3, ptr @.str.4
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %0
  %.05.lcssa = phi ptr [ @.str.4, %0 ], [ %16, %._crit_edge.loopexit ]
  %17 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %.05.lcssa)
  br label %18

18:                                               ; preds = %.thread, %._crit_edge
  call void @llvm.lifetime.end.p0(i64 4, 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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