; LLVM IR from DionysiosB/CodeForces :: 1100-1199 (1143B-Nirvana)

; 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 [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_Z12digitproductx(i64 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %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
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #4
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = call noundef i64 @_Z12digitproductx(i64 noundef %8)
  store i64 %9, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  store i64 1, ptr %4, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %33, %0
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = icmp sle i64 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  br label %36

15:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %16 = load i64, ptr %2, align 8, !tbaa !5
  %17 = load i64, ptr %4, align 8, !tbaa !5
  %18 = sdiv i64 %16, %17
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = mul nsw i64 %18, %19
  store i64 %20, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = sub nsw i64 %21, 1
  %23 = call noundef i64 @_Z12digitproductx(i64 noundef %22)
  store i64 %23, ptr %6, align 8, !tbaa !5
  %24 = load i64, ptr %3, align 8, !tbaa !5
  %25 = load i64, ptr %6, align 8, !tbaa !5
  %26 = icmp sgt i64 %24, %25
  br i1 %26, label %27, label %29

27:                                               ; preds = %15
  %28 = load i64, ptr %3, align 8, !tbaa !5
  br label %31

29:                                               ; preds = %15
  %30 = load i64, ptr %6, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %29, %27
  %32 = phi i64 [ %28, %27 ], [ %30, %29 ]
  store i64 %32, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %33

33:                                               ; preds = %31
  %34 = load i64, ptr %4, align 8, !tbaa !5
  %35 = mul nsw i64 %34, 10
  store i64 %35, ptr %4, align 8, !tbaa !5
  br label %10, !llvm.loop !9

36:                                               ; preds = %14
  %37 = load i64, ptr %3, align 8, !tbaa !5
  %38 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %37)
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #4
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #3

declare i32 @printf(ptr noundef, ...) #3

attributes #0 = { mustprogress 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { "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 #4 = { 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 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 [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_Z12digitproductx(i64 noundef) local_unnamed_addr #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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #5
  %2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %3 = load i64, ptr %1, align 8, !tbaa !5
  %4 = call noundef i64 @_Z12digitproductx(i64 noundef %3)
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %.fr12 = freeze i64 %5
  %.not13 = icmp slt i64 %.fr12, 1
  br i1 %.not13, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %0
  %.0.lcssa = phi i64 [ %4, %0 ], [ %11, %.lr.ph ]
  %6 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.0.lcssa)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #5
  ret i32 0

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.fr16 = phi i64 [ %.fr, %.lr.ph ], [ %.fr12, %0 ]
  %.015 = phi i64 [ %11, %.lr.ph ], [ %4, %0 ]
  %.01014 = phi i64 [ %12, %.lr.ph ], [ 1, %0 ]
  %7 = srem i64 %.fr16, %.01014
  %8 = xor i64 %7, -1
  %9 = add i64 %.fr16, %8
  %10 = call noundef i64 @_Z12digitproductx(i64 noundef %9)
  %11 = call i64 @llvm.smax.i64(i64 %.015, i64 %10)
  %12 = mul nuw nsw i64 %.01014, 10
  %13 = load i64, ptr %1, align 8, !tbaa !5
  %.fr = freeze i64 %13
  %.not = icmp sgt i64 %12, %.fr
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smax.i64(i64, i64) #4

attributes #0 = { mustprogress 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 = { mustprogress 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 #3 = { 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 #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #5 = { 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 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,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass