; LLVM IR from Izaron/ACM-ICPC :: Timus Online Judge/Volume 1/1018. Binary Apple Tree.ll (Z3dfsii)

; 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::set" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<std::pair<int, int>, std::pair<int, int>, std::_Identity<std::pair<int, int>>, std::less<std::pair<int, int>>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<std::pair<int, int>, std::pair<int, int>, std::_Identity<std::pair<int, int>>, std::less<std::pair<int, int>>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }
%"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 }
%"struct.std::pair" = type { i32, i32 }
%"struct.std::_Rb_tree_const_iterator" = type { ptr }

@neig = external dso_local global [105 x %"class.std::set"], align 16
@sub_size = external dso_local global %"class.std::vector", align 8
@from_par = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; 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 dso_local ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorISt4pairIiiEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

; 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 noundef i32 @_Z3dfsii(i32 noundef %0, i32 noundef %1) #2 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca %"struct.std::pair", align 4
  %6 = alloca ptr, align 8
  %7 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %8 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %9 = alloca i32, align 4
  %10 = alloca %"struct.std::pair", align 4
  %11 = alloca i32, align 4
  %12 = alloca ptr, align 8
  %13 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %14 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %15 = alloca %"struct.std::pair", align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = icmp ne i32 %16, -1
  br i1 %17, label %18, label %56

18:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXsr6__and_ISt37__is_implicitly_default_constructibleIT_ES3_IT0_EEE5valueEbE4typeELb1EEEv(ptr noundef nonnull align 4 dereferenceable(8) %5)
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [105 x %"class.std::set"], ptr @neig, i64 0, i64 %20
  store ptr %21, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %22 = load ptr, ptr %6, align 8, !tbaa !9
  %23 = call ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %22) #4
  %24 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %7, i32 0, i32 0
  store ptr %23, ptr %24, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %25 = load ptr, ptr %6, align 8, !tbaa !9
  %26 = call ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %25) #4
  %27 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %8, i32 0, i32 0
  store ptr %26, ptr %27, align 8
  br label %28

28:                                               ; preds = %43, %18
  %29 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIiiEES4_(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8) #4
  br i1 %29, label %31, label %30

30:                                               ; preds = %28
  store i32 2, ptr %9, align 4
  br label %45

31:                                               ; preds = %28
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %32 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorISt4pairIiiEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %10, ptr align 4 %32, i64 8, i1 false)
  %33 = getelementptr inbounds %"struct.std::pair", ptr %10, i32 0, i32 0
  %34 = load i32, ptr %33, align 4, !tbaa !11
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = icmp eq i32 %34, %35
  br i1 %36, label %37, label %39

37:                                               ; preds = %31
  %38 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSERKS0_(ptr noundef nonnull align 4 dereferenceable(8) %5, ptr noundef nonnull align 4 dereferenceable(8) %10)
  store i32 2, ptr %9, align 4
  br label %40

39:                                               ; preds = %31
  store i32 0, ptr %9, align 4
  br label %40

40:                                               ; preds = %39, %37
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  %41 = load i32, ptr %9, align 4
  switch i32 %41, label %45 [
    i32 0, label %42
  ]

42:                                               ; preds = %40
  br label %43

43:                                               ; preds = %42
  %44 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorISt4pairIiiEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #4
  br label %28

45:                                               ; preds = %40, %30
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br label %46

46:                                               ; preds = %45
  %47 = getelementptr inbounds %"struct.std::pair", ptr %5, i32 0, i32 1
  %48 = load i32, ptr %47, align 4, !tbaa !13
  %49 = load i32, ptr %3, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @from_par, i64 noundef %50) #4
  store i32 %48, ptr %51, align 4, !tbaa !5
  %52 = load i32, ptr %3, align 4, !tbaa !5
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds [105 x %"class.std::set"], ptr @neig, i64 0, i64 %53
  %55 = call noundef i64 @_ZNSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE5eraseERKS1_(ptr noundef nonnull align 8 dereferenceable(48) %54, ptr noundef nonnull align 4 dereferenceable(8) %5)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %56

56:                                               ; preds = %46, %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #4
  store i32 1, ptr %11, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #4
  %57 = load i32, ptr %3, align 4, !tbaa !5
  %58 = sext i32 %57 to i64
  %59 = getelementptr inbounds [105 x %"class.std::set"], ptr @neig, i64 0, i64 %58
  store ptr %59, ptr %12, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #4
  %60 = load ptr, ptr %12, align 8, !tbaa !9
  %61 = call ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %60) #4
  %62 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %13, i32 0, i32 0
  store ptr %61, ptr %62, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %14) #4
  %63 = load ptr, ptr %12, align 8, !tbaa !9
  %64 = call ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %63) #4
  %65 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %14, i32 0, i32 0
  store ptr %64, ptr %65, align 8
  br label %66

66:                                               ; preds = %77, %56
  %67 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIiiEES4_(ptr noundef nonnull align 8 dereferenceable(8) %13, ptr noundef nonnull align 8 dereferenceable(8) %14) #4
  br i1 %67, label %69, label %68

68:                                               ; preds = %66
  store i32 4, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %14) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #4
  br label %79

69:                                               ; preds = %66
  call void @llvm.lifetime.start.p0(i64 8, ptr %15) #4
  %70 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorISt4pairIiiEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %13) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %15, ptr align 4 %70, i64 8, i1 false)
  %71 = getelementptr inbounds %"struct.std::pair", ptr %15, i32 0, i32 0
  %72 = load i32, ptr %71, align 4, !tbaa !11
  %73 = load i32, ptr %3, align 4, !tbaa !5
  %74 = call noundef i32 @_Z3dfsii(i32 noundef %72, i32 noundef %73)
  %75 = load i32, ptr %11, align 4, !tbaa !5
  %76 = add nsw i32 %75, %74
  store i32 %76, ptr %11, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %15) #4
  br label %77

77:                                               ; preds = %69
  %78 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorISt4pairIiiEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %13) #4
  br label %66

79:                                               ; preds = %68
  %80 = load i32, ptr %11, align 4, !tbaa !5
  %81 = load i32, ptr %3, align 4, !tbaa !5
  %82 = sext i32 %81 to i64
  %83 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @sub_size, i64 noundef %82) #4
  store i32 %80, ptr %83, align 4, !tbaa !5
  %84 = load i32, ptr %11, align 4, !tbaa !5
  store i32 1, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #4
  ret i32 %84
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXsr6__and_ISt37__is_implicitly_default_constructibleIT_ES3_IT0_EEE5valueEbE4typeELb1EEEv(ptr noundef nonnull align 4 dereferenceable(8)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIiiEES4_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #0

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSERKS0_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(8)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorISt4pairIiiEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE5eraseERKS1_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(8)) #2 align 2

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}
!13 = !{!12, !6, i64 4}


; 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::set" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<std::pair<int, int>, std::pair<int, int>, std::_Identity<std::pair<int, int>>, std::less<std::pair<int, int>>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<std::pair<int, int>, std::pair<int, int>, std::_Identity<std::pair<int, int>>, std::less<std::pair<int, int>>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }
%"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 }
%"struct.std::pair" = type { i32, i32 }
%"struct.std::_Rb_tree_const_iterator" = type { ptr }

@neig = external dso_local global [105 x %"class.std::set"], align 16
@sub_size = external dso_local global %"class.std::vector", align 8
@from_par = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; 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 dso_local ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorISt4pairIiiEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; 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 noundef i32 @_Z3dfsii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #2 {
  %3 = alloca %"struct.std::pair", align 4
  %4 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %5 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %6 = alloca %"struct.std::pair", align 8
  %7 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %8 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %.not = icmp eq i32 %1, -1
  br i1 %.not, label %._crit_edge20, label %9

._crit_edge20:                                    ; preds = %2
  %.pre = sext i32 %0 to i64
  br label %26

9:                                                ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  call void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXsr6__and_ISt37__is_implicitly_default_constructibleIT_ES3_IT0_EEE5valueEbE4typeELb1EEEv(ptr noundef nonnull align 4 dereferenceable(8) %3)
  %10 = sext i32 %0 to i64
  %11 = getelementptr inbounds [105 x %"class.std::set"], ptr @neig, i64 0, i64 %10
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %12 = call ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %11) #3
  store ptr %12, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  %13 = call ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %11) #3
  store ptr %13, ptr %5, align 8
  %14 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIiiEES4_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5) #3
  br i1 %14, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %9, %.critedge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #3
  %15 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorISt4pairIiiEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  %16 = load i64, ptr %15, align 4
  store i64 %16, ptr %6, align 8
  %17 = trunc i64 %16 to i32
  %.not17 = icmp eq i32 %17, %1
  br i1 %.not17, label %18, label %.critedge

18:                                               ; preds = %.lr.ph
  %19 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSERKS0_(ptr noundef nonnull align 4 dereferenceable(8) %3, ptr noundef nonnull align 4 dereferenceable(8) %6)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #3
  br label %.loopexit

.critedge:                                        ; preds = %.lr.ph
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #3
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorISt4pairIiiEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  %21 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIiiEES4_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5) #3
  br i1 %21, label %.lr.ph, label %.loopexit

.loopexit:                                        ; preds = %.critedge, %9, %18
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  %22 = getelementptr inbounds i8, ptr %3, i64 4
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @from_par, i64 noundef %10) #3
  store i32 %23, ptr %24, align 4, !tbaa !10
  %25 = call noundef i64 @_ZNSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE5eraseERKS1_(ptr noundef nonnull align 8 dereferenceable(48) %11, ptr noundef nonnull align 4 dereferenceable(8) %3)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  br label %26

26:                                               ; preds = %._crit_edge20, %.loopexit
  %.pre-phi = phi i64 [ %.pre, %._crit_edge20 ], [ %10, %.loopexit ]
  %27 = getelementptr inbounds [105 x %"class.std::set"], ptr @neig, i64 0, i64 %.pre-phi
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %7) #3
  %28 = call ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %27) #3
  store ptr %28, ptr %7, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %8) #3
  %29 = call ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %27) #3
  store ptr %29, ptr %8, align 8
  %30 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIiiEES4_(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8) #3
  br i1 %30, label %.lr.ph19, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph19, %26
  %.015.lcssa = phi i32 [ 1, %26 ], [ %34, %.lr.ph19 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %7) #3
  %31 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @sub_size, i64 noundef %.pre-phi) #3
  store i32 %.015.lcssa, ptr %31, align 4, !tbaa !10
  ret i32 %.015.lcssa

.lr.ph19:                                         ; preds = %26, %.lr.ph19
  %.01518 = phi i32 [ %34, %.lr.ph19 ], [ 1, %26 ]
  %32 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorISt4pairIiiEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #3
  %.sroa.0.0.copyload = load i32, ptr %32, align 4
  %33 = call noundef i32 @_Z3dfsii(i32 noundef %.sroa.0.0.copyload, i32 noundef %0)
  %34 = add nsw i32 %33, %.01518
  %35 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorISt4pairIiiEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #3
  %36 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIiiEES4_(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8) #3
  br i1 %36, label %.lr.ph19, label %._crit_edge
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXsr6__and_ISt37__is_implicitly_default_constructibleIT_ES3_IT0_EEE5valueEbE4typeELb1EEEv(ptr noundef nonnull align 4 dereferenceable(8)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIiiEES4_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSERKS0_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorISt4pairIiiEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNSt3setISt4pairIiiESt4lessIS1_ESaIS1_EE5eraseERKS1_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #2 align 2

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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, !7, i64 4}
!6 = !{!"_ZTSSt4pairIiiE", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!7, !7, i64 0}


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