; LLVM IR from tangjz/acm-icpc :: 51nod (1225)

; 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"

@n = external dso_local global i64, align 8
@ans = external dso_local global i64, align 8
@.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 norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n)
  %5 = load i64, ptr @n, align 8, !tbaa !5
  %6 = srem i64 %5, 1000000007
  %7 = load i64, ptr @n, align 8, !tbaa !5
  %8 = srem i64 %7, 1000000007
  %9 = mul nsw i64 %6, %8
  %10 = srem i64 %9, 1000000007
  store i64 %10, ptr @ans, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  store i64 1, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  br label %11

11:                                               ; preds = %55, %0
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = load i64, ptr @n, align 8, !tbaa !5
  %14 = icmp sle i64 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  br label %58

16:                                               ; preds = %11
  %17 = load i64, ptr @n, align 8, !tbaa !5
  %18 = load i64, ptr @n, align 8, !tbaa !5
  %19 = load i64, ptr %2, align 8, !tbaa !5
  %20 = sdiv i64 %18, %19
  %21 = sdiv i64 %17, %20
  store i64 %21, ptr %3, align 8, !tbaa !5
  %22 = load i64, ptr %3, align 8, !tbaa !5
  %23 = load i64, ptr @n, align 8, !tbaa !5
  %24 = icmp sgt i64 %22, %23
  br i1 %24, label %25, label %27

25:                                               ; preds = %16
  %26 = load i64, ptr @n, align 8, !tbaa !5
  store i64 %26, ptr %3, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %25, %16
  %28 = load i64, ptr @n, align 8, !tbaa !5
  %29 = load i64, ptr %2, align 8, !tbaa !5
  %30 = sdiv i64 %28, %29
  %31 = srem i64 %30, 1000000007
  %32 = load i64, ptr %2, align 8, !tbaa !5
  %33 = load i64, ptr %3, align 8, !tbaa !5
  %34 = add nsw i64 %32, %33
  %35 = srem i64 %34, 1000000007
  %36 = mul nsw i64 %31, %35
  %37 = srem i64 %36, 1000000007
  %38 = load i64, ptr %3, align 8, !tbaa !5
  %39 = load i64, ptr %2, align 8, !tbaa !5
  %40 = sub nsw i64 %38, %39
  %41 = add nsw i64 %40, 1
  %42 = srem i64 %41, 1000000007
  %43 = mul nsw i64 %37, %42
  %44 = srem i64 %43, 1000000007
  %45 = mul nsw i64 %44, 500000004
  %46 = srem i64 %45, 1000000007
  %47 = load i64, ptr @ans, align 8, !tbaa !5
  %48 = sub nsw i64 %47, %46
  store i64 %48, ptr @ans, align 8, !tbaa !5
  %49 = load i64, ptr @ans, align 8, !tbaa !5
  %50 = icmp slt i64 %49, 0
  br i1 %50, label %51, label %54

51:                                               ; preds = %27
  %52 = load i64, ptr @ans, align 8, !tbaa !5
  %53 = add nsw i64 %52, 1000000007
  store i64 %53, ptr @ans, align 8, !tbaa !5
  br label %54

54:                                               ; preds = %51, %27
  br label %55

55:                                               ; preds = %54
  %56 = load i64, ptr %3, align 8, !tbaa !5
  %57 = add nsw i64 %56, 1
  store i64 %57, ptr %2, align 8, !tbaa !5
  br label %11, !llvm.loop !9

58:                                               ; preds = %15
  %59 = load i64, ptr @ans, align 8, !tbaa !5
  %60 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %59)
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

declare i32 @printf(ptr noundef, ...) #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 = { "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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 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"

@n = external dso_local global i64, align 8
@ans = external dso_local local_unnamed_addr global i64, align 8
@.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 nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  %2 = load i64, ptr @n, align 8, !tbaa !5
  %3 = srem i64 %2, 1000000007
  %4 = mul nsw i64 %3, %3
  %5 = urem i64 %4, 1000000007
  store i64 %5, ptr @ans, align 8, !tbaa !5
  %.not14 = icmp slt i64 %2, 1
  br i1 %.not14, label %6, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph
  store i64 %storemerge, ptr @ans, align 8, !tbaa !5
  br label %6

6:                                                ; preds = %._crit_edge, %0
  %7 = phi i64 [ %storemerge, %._crit_edge ], [ %5, %0 ]
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %7)
  ret i32 0

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.0916 = phi i64 [ %26, %.lr.ph ], [ 1, %0 ]
  %storemerge1315 = phi i64 [ %storemerge, %.lr.ph ], [ %5, %0 ]
  %9 = udiv i64 %2, %.0916
  %10 = udiv i64 %2, %9
  %spec.select = tail call i64 @llvm.smin.i64(i64 %10, i64 %2)
  %11 = sdiv i64 %2, %.0916
  %12 = srem i64 %11, 1000000007
  %13 = add nuw nsw i64 %spec.select, %.0916
  %14 = urem i64 %13, 1000000007
  %15 = mul nsw i64 %14, %12
  %16 = srem i64 %15, 1000000007
  %reass.sub = sub i64 %spec.select, %.0916
  %17 = add i64 %reass.sub, 1
  %18 = srem i64 %17, 1000000007
  %19 = mul nsw i64 %16, %18
  %20 = srem i64 %19, 1000000007
  %21 = mul nsw i64 %20, 500000004
  %22 = srem i64 %21, 1000000007
  %23 = sub nsw i64 %storemerge1315, %22
  %24 = icmp slt i64 %23, 0
  %25 = add nsw i64 %23, 1000000007
  %storemerge = select i1 %24, i64 %25, i64 %23
  %26 = add nuw nsw i64 %spec.select, 1
  %.not.not = icmp slt i64 %10, %2
  br i1 %.not.not, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smin.i64(i64, i64) #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 = { 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 #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass