; LLVM IR from tangjz/acm-icpc :: lydsy (4159)

; 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 i32, align 4
@m = external dso_local global i32, align 4
@u = external dso_local global i32, align 4
@d = external dso_local global i32, align 4
@tmp = external dso_local global i32, align 4
@ans = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  br label %2

2:                                                ; preds = %29, %0
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n, ptr noundef @m)
  %4 = icmp eq i32 %3, 2
  br i1 %4, label %5, label %32

5:                                                ; preds = %2
  store i32 2147483647, ptr @ans, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %28, %5
  %7 = load i32, ptr @m, align 4, !tbaa !5
  %8 = add nsw i32 %7, -1
  store i32 %8, ptr @m, align 4, !tbaa !5
  %9 = icmp ne i32 %7, 0
  br i1 %9, label %10, label %29

10:                                               ; preds = %6
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @u, ptr noundef @d)
  %12 = load i32, ptr @u, align 4, !tbaa !5
  %13 = load i32, ptr @d, align 4, !tbaa !5
  %14 = add nsw i32 %12, %13
  %15 = load i32, ptr @n, align 4, !tbaa !5
  %16 = load i32, ptr @d, align 4, !tbaa !5
  %17 = mul nsw i32 %15, %16
  %18 = load i32, ptr @u, align 4, !tbaa !5
  %19 = load i32, ptr @d, align 4, !tbaa !5
  %20 = add nsw i32 %18, %19
  %21 = srem i32 %17, %20
  %22 = sub nsw i32 %14, %21
  store i32 %22, ptr @tmp, align 4, !tbaa !5
  %23 = load i32, ptr @ans, align 4, !tbaa !5
  %24 = load i32, ptr @tmp, align 4, !tbaa !5
  %25 = icmp sgt i32 %23, %24
  br i1 %25, label %26, label %28

26:                                               ; preds = %10
  %27 = load i32, ptr @tmp, align 4, !tbaa !5
  store i32 %27, ptr @ans, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %26, %10
  br label %6, !llvm.loop !9

29:                                               ; preds = %6
  %30 = load i32, ptr @ans, align 4, !tbaa !5
  %31 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %30)
  br label %2, !llvm.loop !11

32:                                               ; preds = %2
  ret i32 0
}

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

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" }

!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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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 i32, align 4
@m = external dso_local global i32, align 4
@u = external dso_local global i32, align 4
@d = external dso_local global i32, align 4
@tmp = external dso_local local_unnamed_addr global i32, align 4
@ans = external dso_local local_unnamed_addr global i32, align 4
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 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, ptr noundef nonnull @m)
  %2 = icmp eq i32 %1, 2
  br i1 %2, label %.lr.ph3, label %._crit_edge4

.lr.ph3:                                          ; preds = %0, %._crit_edge
  store i32 2147483647, ptr @ans, align 4, !tbaa !5
  %3 = load i32, ptr @m, align 4, !tbaa !5
  %4 = add nsw i32 %3, -1
  store i32 %4, ptr @m, align 4, !tbaa !5
  %.not1 = icmp eq i32 %3, 0
  br i1 %.not1, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph3, %16
  %5 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @u, ptr noundef nonnull @d)
  %6 = load i32, ptr @u, align 4, !tbaa !5
  %7 = load i32, ptr @d, align 4, !tbaa !5
  %8 = add nsw i32 %7, %6
  %9 = load i32, ptr @n, align 4, !tbaa !5
  %10 = mul nsw i32 %9, %7
  %11 = srem i32 %10, %8
  %12 = sub nsw i32 %8, %11
  store i32 %12, ptr @tmp, align 4, !tbaa !5
  %13 = load i32, ptr @ans, align 4, !tbaa !5
  %14 = icmp sgt i32 %13, %12
  br i1 %14, label %15, label %16

15:                                               ; preds = %.lr.ph
  store i32 %12, ptr @ans, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %15, %.lr.ph
  %17 = phi i32 [ %12, %15 ], [ %13, %.lr.ph ]
  %18 = load i32, ptr @m, align 4, !tbaa !5
  %19 = add nsw i32 %18, -1
  store i32 %19, ptr @m, align 4, !tbaa !5
  %.not = icmp eq i32 %18, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %16, %.lr.ph3
  %20 = phi i32 [ 2147483647, %.lr.ph3 ], [ %17, %16 ]
  %21 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %20)
  %22 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n, ptr noundef nonnull @m)
  %23 = icmp eq i32 %22, 2
  br i1 %23, label %.lr.ph3, label %._crit_edge4, !llvm.loop !11

._crit_edge4:                                     ; preds = %._crit_edge, %0
  ret i32 0
}

; 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

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" }

!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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


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