; LLVM IR from DionysiosB/CodeForces :: 2093C-SimpleRepetition (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 [8 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 i32, align 4
  %6 = alloca i8, align 1
  %7 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %9

9:                                                ; preds = %56, %54, %0
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = add nsw i64 %10, -1
  store i64 %11, ptr %2, align 8, !tbaa !5
  %12 = icmp ne i64 %10, 0
  br i1 %12, label %13, label %57

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4)
  %15 = load i64, ptr %3, align 8, !tbaa !5
  %16 = icmp eq i64 %15, 1
  br i1 %16, label %17, label %23

17:                                               ; preds = %13
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = icmp eq i64 %18, 2
  %20 = zext i1 %19 to i64
  %21 = select i1 %19, ptr @.str.2, ptr @.str.3
  %22 = call i32 @puts(ptr noundef %21)
  store i32 2, ptr %5, align 4
  br label %54, !llvm.loop !9

23:                                               ; preds = %13
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = icmp sgt i64 %24, 1
  br i1 %25, label %26, label %28

26:                                               ; preds = %23
  %27 = call i32 @puts(ptr noundef @.str.3)
  store i32 2, ptr %5, align 4
  br label %54, !llvm.loop !9

28:                                               ; preds = %23
  br label %29

29:                                               ; preds = %28
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #3
  store i8 1, ptr %6, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 2, ptr %7, align 8, !tbaa !5
  br label %30

30:                                               ; preds = %44, %29
  %31 = load i64, ptr %7, align 8, !tbaa !5
  %32 = load i64, ptr %7, align 8, !tbaa !5
  %33 = mul nsw i64 %31, %32
  %34 = load i64, ptr %3, align 8, !tbaa !5
  %35 = icmp sle i64 %33, %34
  br i1 %35, label %37, label %36

36:                                               ; preds = %30
  store i32 4, ptr %5, align 4
  br label %47

37:                                               ; preds = %30
  %38 = load i64, ptr %3, align 8, !tbaa !5
  %39 = load i64, ptr %7, align 8, !tbaa !5
  %40 = srem i64 %38, %39
  %41 = icmp ne i64 %40, 0
  br i1 %41, label %42, label %43

42:                                               ; preds = %37
  br label %44

43:                                               ; preds = %37
  store i8 0, ptr %6, align 1, !tbaa !11
  store i32 4, ptr %5, align 4
  br label %47

44:                                               ; preds = %42
  %45 = load i64, ptr %7, align 8, !tbaa !5
  %46 = add nsw i64 %45, 1
  store i64 %46, ptr %7, align 8, !tbaa !5
  br label %30, !llvm.loop !13

47:                                               ; preds = %43, %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %48

48:                                               ; preds = %47
  %49 = load i8, ptr %6, align 1, !tbaa !11, !range !14, !noundef !15
  %50 = trunc i8 %49 to i1
  %51 = zext i1 %50 to i64
  %52 = select i1 %50, ptr @.str.2, ptr @.str.3
  %53 = call i32 @puts(ptr noundef %52)
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #3
  store i32 0, ptr %5, align 4
  br label %54

54:                                               ; preds = %48, %26, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  %55 = load i32, ptr %5, align 4
  switch i32 %55, label %59 [
    i32 0, label %56
    i32 2, label %9
  ]

56:                                               ; preds = %54
  br label %9, !llvm.loop !9

57:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %58 = load i32, ptr %1, align 4
  ret i32 %58

59:                                               ; preds = %54
  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

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"}
!11 = !{!12, !12, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = distinct !{!13, !10}
!14 = !{i8 0, i8 2}
!15 = !{}


; 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 [8 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
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %6 = add nsw i64 %5, -1
  store i64 %6, ptr %1, align 8, !tbaa !5
  %.not14 = icmp eq i64 %5, 0
  br i1 %.not14, label %._crit_edge17, label %.lr.ph16

.lr.ph16:                                         ; preds = %0, %._crit_edge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, 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 i64, ptr %2, align 8, !tbaa !5
  %9 = icmp eq i64 %8, 1
  %10 = load i64, ptr %3, align 8, !tbaa !5
  br i1 %9, label %11, label %14

11:                                               ; preds = %.lr.ph16
  %12 = icmp eq i64 %10, 2
  %13 = select i1 %12, ptr @.str.2, ptr @.str.3
  br label %._crit_edge, !llvm.loop !9

14:                                               ; preds = %.lr.ph16
  %15 = icmp sgt i64 %10, 1
  br i1 %15, label %._crit_edge, label %.preheader, !llvm.loop !9

.preheader:                                       ; preds = %14
  %.not810 = icmp slt i64 %8, 4
  br i1 %.not810, label %._crit_edge, label %.lr.ph

16:                                               ; preds = %.lr.ph
  %17 = add nuw nsw i64 %.011, 1
  %18 = mul nuw nsw i64 %17, %17
  %.not8 = icmp sgt i64 %18, %8
  br i1 %.not8, label %._crit_edge, label %.lr.ph, !llvm.loop !11

.lr.ph:                                           ; preds = %.preheader, %16
  %.011 = phi i64 [ %17, %16 ], [ 2, %.preheader ]
  %19 = urem i64 %8, %.011
  %.not9 = icmp eq i64 %19, 0
  br i1 %.not9, label %._crit_edge, label %16

._crit_edge:                                      ; preds = %.lr.ph, %16, %.preheader, %14, %11
  %.sink = phi ptr [ %13, %11 ], [ @.str.3, %14 ], [ @.str.2, %.preheader ], [ @.str.3, %.lr.ph ], [ @.str.2, %16 ]
  %20 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %.sink)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %21 = load i64, ptr %1, align 8, !tbaa !5
  %22 = add nsw i64 %21, -1
  store i64 %22, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %21, 0
  br i1 %.not, label %._crit_edge17, label %.lr.ph16

._crit_edge17:                                    ; preds = %._crit_edge, %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: 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"}
!11 = distinct !{!11, !10}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass