; LLVM IR from Izaron/ACM-ICPC :: Timus Online Judge/Volume 7/1611. Decimation.ll (Z5vosstii)

; 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"

%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@_Z1sB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@n = external dso_local global i32, align 4
@maxK = external dso_local global i32, align 4
@vec = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3dfsii(i32 noundef, i32 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: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #3

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

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5vosstii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = sub nsw i32 %8, %9
  %11 = load i32, ptr @n, align 4, !tbaa !5
  %12 = icmp sge i32 %10, %11
  br i1 %12, label %13, label %14

13:                                               ; preds = %2
  br label %70

14:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 1000000000, ptr %5, align 4, !tbaa !5
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = load i32, ptr @maxK, align 4, !tbaa !5
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %18, label %32

18:                                               ; preds = %14
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = add nsw i32 %19, 1
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = add nsw i32 %21, 1
  %23 = call noundef i32 @_Z3dfsii(i32 noundef %20, i32 noundef %22)
  store i32 %23, ptr %5, align 4, !tbaa !5
  %24 = load i32, ptr %3, align 4, !tbaa !5
  %25 = add nsw i32 %24, 1
  %26 = srem i32 %25, 10
  %27 = icmp eq i32 %26, 0
  br i1 %27, label %28, label %31

28:                                               ; preds = %18
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %5, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %28, %18
  br label %32

32:                                               ; preds = %31, %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 1000000000, ptr %6, align 4, !tbaa !5
  %33 = load i32, ptr %3, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = call noundef i32 @_Z3dfsii(i32 noundef %34, i32 noundef %35)
  store i32 %36, ptr %6, align 4, !tbaa !5
  %37 = load i32, ptr %3, align 4, !tbaa !5
  %38 = load i32, ptr %4, align 4, !tbaa !5
  %39 = sub nsw i32 %37, %38
  %40 = sext i32 %39 to i64
  %41 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %40)
  %42 = load i8, ptr %41, align 1, !tbaa !9
  %43 = sext i8 %42 to i32
  %44 = icmp eq i32 %43, 49
  br i1 %44, label %45, label %53

45:                                               ; preds = %32
  %46 = load i32, ptr %3, align 4, !tbaa !5
  %47 = add nsw i32 %46, 1
  %48 = srem i32 %47, 10
  %49 = icmp eq i32 %48, 0
  br i1 %49, label %50, label %53

50:                                               ; preds = %45
  %51 = load i32, ptr %6, align 4, !tbaa !5
  %52 = add nsw i32 %51, 1
  store i32 %52, ptr %6, align 4, !tbaa !5
  br label %53

53:                                               ; preds = %50, %45, %32
  %54 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %6)
  %55 = load i32, ptr %54, align 4, !tbaa !5
  %56 = load i32, ptr %6, align 4, !tbaa !5
  %57 = icmp eq i32 %55, %56
  br i1 %57, label %58, label %62

58:                                               ; preds = %53
  %59 = load i32, ptr %3, align 4, !tbaa !5
  %60 = add nsw i32 %59, 1
  %61 = load i32, ptr %4, align 4, !tbaa !5
  call void @_Z5vosstii(i32 noundef %60, i32 noundef %61)
  br label %69

62:                                               ; preds = %53
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %63 = load i32, ptr %3, align 4, !tbaa !5
  %64 = add nsw i32 %63, 1
  store i32 %64, ptr %7, align 4, !tbaa !5
  call void @_ZNSt6vectorIiSaIiEE9push_backEOi(ptr noundef nonnull align 8 dereferenceable(24) @vec, ptr noundef nonnull align 4 dereferenceable(4) %7)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  %65 = load i32, ptr %3, align 4, !tbaa !5
  %66 = add nsw i32 %65, 1
  %67 = load i32, ptr %4, align 4, !tbaa !5
  %68 = add nsw i32 %67, 1
  call void @_Z5vosstii(i32 noundef %66, i32 noundef %68)
  br label %69

69:                                               ; preds = %62, %58
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %70

70:                                               ; preds = %69, %13
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backEOi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

attributes #0 = { 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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!7, !7, i64 0}


; 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"

%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@_Z1sB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@n = external dso_local local_unnamed_addr global i32, align 4
@maxK = external dso_local local_unnamed_addr global i32, align 4
@vec = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3dfsii(i32 noundef, i32 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 nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) 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

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5vosstii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = sub nsw i32 %0, %1
  %7 = load i32, ptr @n, align 4, !tbaa !5
  %.not = icmp slt i32 %6, %7
  br i1 %.not, label %8, label %36

8:                                                ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  store i32 1000000000, ptr %3, align 4, !tbaa !5
  %9 = load i32, ptr @maxK, align 4, !tbaa !5
  %10 = icmp sgt i32 %9, %1
  %11 = add nsw i32 %0, 1
  br i1 %10, label %13, label %._crit_edge

._crit_edge:                                      ; preds = %8
  %.pre18 = srem i32 %11, 10
  %12 = icmp eq i32 %.pre18, 0
  br label %20

13:                                               ; preds = %8
  %14 = add nsw i32 %1, 1
  %15 = tail call noundef i32 @_Z3dfsii(i32 noundef %11, i32 noundef %14)
  store i32 %15, ptr %3, align 4, !tbaa !5
  %16 = srem i32 %11, 10
  %17 = icmp eq i32 %16, 0
  br i1 %17, label %18, label %20

18:                                               ; preds = %13
  %19 = add nsw i32 %15, 1
  store i32 %19, ptr %3, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %._crit_edge, %13, %18
  %.pre-phi19 = phi i1 [ %12, %._crit_edge ], [ false, %13 ], [ true, %18 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #4
  %21 = tail call noundef i32 @_Z3dfsii(i32 noundef %11, i32 noundef %1)
  store i32 %21, ptr %4, align 4, !tbaa !5
  %22 = sext i32 %6 to i64
  %23 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %22)
  %24 = load i8, ptr %23, align 1, !tbaa !9
  %25 = icmp eq i8 %24, 49
  %or.cond = and i1 %.pre-phi19, %25
  br i1 %or.cond, label %26, label %28

26:                                               ; preds = %20
  %27 = add nsw i32 %21, 1
  store i32 %27, ptr %4, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %26, %20
  %29 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = icmp eq i32 %30, %31
  br i1 %32, label %35, label %33

33:                                               ; preds = %28
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #4
  store i32 %11, ptr %5, align 4, !tbaa !5
  call void @_ZNSt6vectorIiSaIiEE9push_backEOi(ptr noundef nonnull align 8 dereferenceable(24) @vec, ptr noundef nonnull align 4 dereferenceable(4) %5)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #4
  %34 = add nsw i32 %1, 1
  br label %35

35:                                               ; preds = %28, %33
  %.sink = phi i32 [ %34, %33 ], [ %1, %28 ]
  call void @_Z5vosstii(i32 noundef %11, i32 noundef %.sink)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  br label %36

36:                                               ; preds = %2, %35
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backEOi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

attributes #0 = { 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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!7, !7, i64 0}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass