; LLVM IR from tangjz/acm-icpc :: 51nod (1074)

; 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 [7 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 i32, align 4
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  store i64 1, ptr %4, align 8, !tbaa !5
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3, ptr noundef %2)
  %11 = load i32, ptr %2, align 4, !tbaa !9
  %12 = icmp eq i32 %11, 1
  br i1 %12, label %13, label %16

13:                                               ; preds = %0
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %14)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  br label %68

16:                                               ; preds = %0
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  store i64 1, ptr %6, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %62, %16
  %18 = load i64, ptr %6, align 8, !tbaa !5
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = icmp sle i64 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  store i32 2, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br label %65

22:                                               ; preds = %17
  %23 = load i64, ptr %4, align 8, !tbaa !5
  %24 = load i32, ptr %2, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = add nsw i64 %23, %25
  %27 = load i64, ptr %6, align 8, !tbaa !5
  %28 = icmp slt i64 %26, %27
  br i1 %28, label %29, label %53

29:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %30 = load i64, ptr %3, align 8, !tbaa !5
  %31 = load i64, ptr %6, align 8, !tbaa !5
  %32 = sub nsw i64 %30, %31
  store i64 %32, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #4
  %33 = load i64, ptr %6, align 8, !tbaa !5
  %34 = load i64, ptr %4, align 8, !tbaa !5
  %35 = sub nsw i64 %33, %34
  %36 = add nsw i64 %35, 1
  %37 = load i32, ptr %2, align 4, !tbaa !9
  %38 = sub nsw i32 %37, 1
  %39 = sext i32 %38 to i64
  %40 = sdiv i64 %36, %39
  %41 = sub nsw i64 %40, 1
  store i64 %41, ptr %9, align 8, !tbaa !5
  %42 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %8, ptr noundef nonnull align 8 dereferenceable(8) %9)
  %43 = load i64, ptr %42, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  store i64 %43, ptr %7, align 8, !tbaa !5
  %44 = load i32, ptr %2, align 4, !tbaa !9
  %45 = sext i32 %44 to i64
  %46 = load i64, ptr %7, align 8, !tbaa !5
  %47 = mul nsw i64 %45, %46
  %48 = load i64, ptr %4, align 8, !tbaa !5
  %49 = add nsw i64 %48, %47
  store i64 %49, ptr %4, align 8, !tbaa !5
  %50 = load i64, ptr %7, align 8, !tbaa !5
  %51 = load i64, ptr %6, align 8, !tbaa !5
  %52 = add nsw i64 %51, %50
  store i64 %52, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  br label %53

53:                                               ; preds = %29, %22
  %54 = load i64, ptr %4, align 8, !tbaa !5
  %55 = load i32, ptr %2, align 4, !tbaa !9
  %56 = sext i32 %55 to i64
  %57 = add nsw i64 %54, %56
  %58 = sub nsw i64 %57, 1
  %59 = load i64, ptr %6, align 8, !tbaa !5
  %60 = srem i64 %58, %59
  %61 = add nsw i64 %60, 1
  store i64 %61, ptr %4, align 8, !tbaa !5
  br label %62

62:                                               ; preds = %53
  %63 = load i64, ptr %6, align 8, !tbaa !5
  %64 = add nsw i64 %63, 1
  store i64 %64, ptr %6, align 8, !tbaa !5
  br label %17, !llvm.loop !11

65:                                               ; preds = %21
  %66 = load i64, ptr %4, align 8, !tbaa !5
  %67 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %66)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  br label %68

68:                                               ; preds = %65, %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  %69 = load i32, ptr %1, align 4
  ret i32 %69
}

; 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 @printf(ptr noundef, ...) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #3

; 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 = { inlinehint 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 #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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 [7 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2, ptr noundef nonnull %1)
  %6 = load i32, ptr %1, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 1
  %8 = load i64, ptr %2, align 8, !tbaa !9
  br i1 %7, label %._crit_edge, label %.preheader

.preheader:                                       ; preds = %0
  %.not18 = icmp slt i64 %8, 1
  br i1 %.not18, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader, %28
  %9 = phi i64 [ %29, %28 ], [ %8, %.preheader ]
  %10 = phi i32 [ %30, %28 ], [ %6, %.preheader ]
  %.01520 = phi i64 [ %35, %28 ], [ 1, %.preheader ]
  %.01619 = phi i64 [ %34, %28 ], [ 1, %.preheader ]
  %11 = sext i32 %10 to i64
  %12 = add nsw i64 %.01619, %11
  %13 = icmp slt i64 %12, %.01520
  br i1 %13, label %14, label %28

14:                                               ; preds = %.lr.ph
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %15 = sub nsw i64 %9, %.01520
  store i64 %15, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %reass.sub = sub i64 %.01520, %.01619
  %16 = add i64 %reass.sub, 1
  %17 = add nsw i32 %10, -1
  %18 = sext i32 %17 to i64
  %19 = sdiv i64 %16, %18
  %20 = add nsw i64 %19, -1
  store i64 %20, ptr %4, align 8, !tbaa !9
  %21 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4)
  %22 = load i64, ptr %21, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  %23 = load i32, ptr %1, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = mul nsw i64 %22, %24
  %26 = add nsw i64 %25, %.01619
  %27 = add nsw i64 %22, %.01520
  %.pre = load i64, ptr %2, align 8, !tbaa !9
  br label %28

28:                                               ; preds = %14, %.lr.ph
  %.pre-phi = phi i64 [ %24, %14 ], [ %11, %.lr.ph ]
  %29 = phi i64 [ %.pre, %14 ], [ %9, %.lr.ph ]
  %30 = phi i32 [ %23, %14 ], [ %10, %.lr.ph ]
  %.117 = phi i64 [ %26, %14 ], [ %.01619, %.lr.ph ]
  %.1 = phi i64 [ %27, %14 ], [ %.01520, %.lr.ph ]
  %31 = add i64 %.117, -1
  %32 = add i64 %31, %.pre-phi
  %33 = srem i64 %32, %.1
  %34 = add nsw i64 %33, 1
  %35 = add nsw i64 %.1, 1
  %.not.not = icmp slt i64 %.1, %29
  br i1 %.not.not, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %28, %.preheader, %0
  %.016.lcssa.sink = phi i64 [ %8, %0 ], [ 1, %.preheader ], [ %34, %28 ]
  %36 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.016.lcssa.sink)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  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 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3

; 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 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 = { inlinehint 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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