; LLVM IR from tangjz/acm-icpc :: lydsy (4421)

; 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
@val = external dso_local global i32, align 4
@ans = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [6 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
  %2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n, ptr noundef @m)
  br label %3

3:                                                ; preds = %29, %0
  %4 = load i32, ptr @n, align 4, !tbaa !5
  %5 = add nsw i32 %4, -1
  store i32 %5, ptr @n, align 4, !tbaa !5
  %6 = icmp ne i32 %4, 0
  br i1 %6, label %7, label %30

7:                                                ; preds = %3
  %8 = load i32, ptr @val, align 4, !tbaa !5
  %9 = shl i32 %8, 3
  %10 = load i32, ptr @val, align 4, !tbaa !5
  %11 = shl i32 %10, 1
  %12 = add nsw i32 %9, %11
  %13 = call i32 @getchar()
  %14 = sub nsw i32 %13, 48
  %15 = add nsw i32 %12, %14
  %16 = load i32, ptr @m, align 4, !tbaa !5
  %17 = srem i32 %15, %16
  store i32 %17, ptr @val, align 4, !tbaa !5
  %18 = load i32, ptr @val, align 4, !tbaa !5
  %19 = icmp ne i32 %18, 0
  br i1 %19, label %29, label %20

20:                                               ; preds = %7
  %21 = load i32, ptr @ans, align 4, !tbaa !5
  %22 = shl i32 %21, 1
  store i32 %22, ptr @ans, align 4, !tbaa !5
  %23 = load i32, ptr @ans, align 4, !tbaa !5
  %24 = icmp sge i32 %23, 1000000007
  br i1 %24, label %25, label %28

25:                                               ; preds = %20
  %26 = load i32, ptr @ans, align 4, !tbaa !5
  %27 = sub nsw i32 %26, 1000000007
  store i32 %27, ptr @ans, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %25, %20
  br label %29

29:                                               ; preds = %28, %7
  br label %3, !llvm.loop !9

30:                                               ; preds = %3
  %31 = load i32, ptr @val, align 4, !tbaa !5
  %32 = icmp ne i32 %31, 0
  br i1 %32, label %33, label %34

33:                                               ; preds = %30
  br label %36

34:                                               ; preds = %30
  %35 = load i32, ptr @ans, align 4, !tbaa !5
  br label %36

36:                                               ; preds = %34, %33
  %37 = phi i32 [ 0, %33 ], [ %35, %34 ]
  %38 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %37)
  ret i32 0
}

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

; Function Attrs: inlinehint mustprogress uwtable
declare i32 @getchar() #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 = { inlinehint mustprogress 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" }

!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"}


; 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
@val = 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 [6 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 = load i32, ptr @n, align 4, !tbaa !5
  %3 = add nsw i32 %2, -1
  store i32 %3, ptr @n, align 4, !tbaa !5
  %.not3 = icmp eq i32 %2, 0
  %.pre4 = load i32, ptr @val, align 4, !tbaa !5
  br i1 %.not3, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %17
  %4 = phi i32 [ %10, %17 ], [ %.pre4, %0 ]
  %5 = mul i32 %4, 10
  %6 = tail call i32 @getchar()
  %7 = add nsw i32 %6, -48
  %8 = add nsw i32 %7, %5
  %9 = load i32, ptr @m, align 4, !tbaa !5
  %10 = srem i32 %8, %9
  store i32 %10, ptr @val, align 4, !tbaa !5
  %.not2 = icmp eq i32 %10, 0
  br i1 %.not2, label %11, label %17

11:                                               ; preds = %.lr.ph
  %12 = load i32, ptr @ans, align 4, !tbaa !5
  %13 = shl i32 %12, 1
  store i32 %13, ptr @ans, align 4, !tbaa !5
  %14 = icmp sgt i32 %13, 1000000006
  br i1 %14, label %15, label %17

15:                                               ; preds = %11
  %16 = add nsw i32 %13, -1000000007
  store i32 %16, ptr @ans, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %11, %15, %.lr.ph
  %18 = load i32, ptr @n, align 4, !tbaa !5
  %19 = add nsw i32 %18, -1
  store i32 %19, ptr @n, 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 = %17, %0
  %20 = phi i32 [ %.pre4, %0 ], [ %10, %17 ]
  %.not1 = icmp eq i32 %20, 0
  %21 = load i32, ptr @ans, align 4
  %22 = select i1 %.not1, i32 %21, i32 0
  %23 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %22)
  ret i32 0
}

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

; Function Attrs: inlinehint mustprogress nofree nounwind uwtable
declare noundef i32 @getchar() local_unnamed_addr #2

; 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" }
attributes #2 = { inlinehint mustprogress nofree 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" }

!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"}


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