; LLVM IR from eyangch/competitive-programming :: Codeforces/1186/f.ll (Z3dfsxx)

; 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<long long, long long, std::_Identity<long long>, std::less<long long>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<long long, long long, std::_Identity<long long>, std::less<long long>>::_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<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::stack" = type { %"class.std::deque" }
%"class.std::deque" = type { %"class.std::_Deque_base" }
%"class.std::_Deque_base" = type { %"struct.std::_Deque_base<long long, std::allocator<long long>>::_Deque_impl" }
%"struct.std::_Deque_base<long long, std::allocator<long long>>::_Deque_impl" = type { %"struct.std::_Deque_base<long long, std::allocator<long long>>::_Deque_impl_data" }
%"struct.std::_Deque_base<long long, std::allocator<long long>>::_Deque_impl_data" = type { ptr, i64, %"struct.std::_Deque_iterator", %"struct.std::_Deque_iterator" }
%"struct.std::_Deque_iterator" = type { ptr, ptr, ptr, ptr }
%"struct.std::_Rb_tree_const_iterator" = type { ptr }

@C = external dso_local global [1000001 x i64], align 16
@graph = external dso_local global [1000001 x %"class.std::set"], align 16
@etour = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsxx(i64 noundef %0, i64 noundef %1) #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca %"class.std::stack", align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 80, ptr %5) #4
  call void @_ZNSt5stackIxSt5dequeIxSaIxEEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(80) %5)
  invoke void @_ZNSt5stackIxSt5dequeIxSaIxEEE4pushERKx(ptr noundef nonnull align 8 dereferenceable(80) %5, ptr noundef nonnull align 8 dereferenceable(8) %3)
          to label %11 unwind label %29

11:                                               ; preds = %2
  br label %12

12:                                               ; preds = %57, %11
  %13 = invoke noundef zeroext i1 @_ZNKSt5stackIxSt5dequeIxSaIxEEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %5)
          to label %14 unwind label %29

14:                                               ; preds = %12
  %15 = xor i1 %13, true
  br i1 %15, label %16, label %59

16:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %17 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIxSt5dequeIxSaIxEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) %5)
          to label %18 unwind label %33

18:                                               ; preds = %16
  %19 = load i64, ptr %17, align 8, !tbaa !5
  store i64 %19, ptr %8, align 8, !tbaa !5
  %20 = load i64, ptr %4, align 8, !tbaa !5
  %21 = load i64, ptr %8, align 8, !tbaa !5
  %22 = getelementptr inbounds [1000001 x i64], ptr @C, i64 0, i64 %21
  store i64 %20, ptr %22, align 8, !tbaa !5
  %23 = load i64, ptr %8, align 8, !tbaa !5
  %24 = getelementptr inbounds [1000001 x %"class.std::set"], ptr @graph, i64 0, i64 %23
  %25 = call noundef zeroext i1 @_ZNKSt3setIxSt4lessIxESaIxEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(48) %24) #4
  br i1 %25, label %26, label %37

26:                                               ; preds = %18
  invoke void @_ZNSt5stackIxSt5dequeIxSaIxEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %5)
          to label %27 unwind label %33

27:                                               ; preds = %26
  invoke void @_ZNSt6vectorIxSaIxEE9push_backERKx(ptr noundef nonnull align 8 dereferenceable(24) @etour, ptr noundef nonnull align 8 dereferenceable(8) %8)
          to label %28 unwind label %33

28:                                               ; preds = %27
  br label %57

29:                                               ; preds = %12, %2
  %30 = landingpad { ptr, i32 }
          cleanup
  %31 = extractvalue { ptr, i32 } %30, 0
  store ptr %31, ptr %6, align 8
  %32 = extractvalue { ptr, i32 } %30, 1
  store i32 %32, ptr %7, align 4
  br label %60

33:                                               ; preds = %27, %26, %16
  %34 = landingpad { ptr, i32 }
          cleanup
  %35 = extractvalue { ptr, i32 } %34, 0
  store ptr %35, ptr %6, align 8
  %36 = extractvalue { ptr, i32 } %34, 1
  store i32 %36, ptr %7, align 4
  br label %58

37:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %38 = load i64, ptr %8, align 8, !tbaa !5
  %39 = getelementptr inbounds [1000001 x %"class.std::set"], ptr @graph, i64 0, i64 %38
  %40 = call ptr @_ZNKSt3setIxSt4lessIxESaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %39) #4
  %41 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %10, i32 0, i32 0
  store ptr %40, ptr %41, align 8
  %42 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorIxEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %10) #4
  %43 = load i64, ptr %42, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  store i64 %43, ptr %9, align 8, !tbaa !5
  %44 = load i64, ptr %8, align 8, !tbaa !5
  %45 = getelementptr inbounds [1000001 x %"class.std::set"], ptr @graph, i64 0, i64 %44
  %46 = invoke noundef i64 @_ZNSt3setIxSt4lessIxESaIxEE5eraseERKx(ptr noundef nonnull align 8 dereferenceable(48) %45, ptr noundef nonnull align 8 dereferenceable(8) %9)
          to label %47 unwind label %53

47:                                               ; preds = %37
  %48 = load i64, ptr %9, align 8, !tbaa !5
  %49 = getelementptr inbounds [1000001 x %"class.std::set"], ptr @graph, i64 0, i64 %48
  %50 = invoke noundef i64 @_ZNSt3setIxSt4lessIxESaIxEE5eraseERKx(ptr noundef nonnull align 8 dereferenceable(48) %49, ptr noundef nonnull align 8 dereferenceable(8) %8)
          to label %51 unwind label %53

51:                                               ; preds = %47
  invoke void @_ZNSt5stackIxSt5dequeIxSaIxEEE4pushERKx(ptr noundef nonnull align 8 dereferenceable(80) %5, ptr noundef nonnull align 8 dereferenceable(8) %9)
          to label %52 unwind label %53

52:                                               ; preds = %51
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #4
  br label %57

53:                                               ; preds = %51, %47, %37
  %54 = landingpad { ptr, i32 }
          cleanup
  %55 = extractvalue { ptr, i32 } %54, 0
  store ptr %55, ptr %6, align 8
  %56 = extractvalue { ptr, i32 } %54, 1
  store i32 %56, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #4
  br label %58

57:                                               ; preds = %52, %28
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  br label %12, !llvm.loop !9

58:                                               ; preds = %53, %33
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  br label %60

59:                                               ; preds = %14
  call void @_ZNSt5stackIxSt5dequeIxSaIxEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %5) #4
  call void @llvm.lifetime.end.p0(i64 80, ptr %5) #4
  ret void

60:                                               ; preds = %58, %29
  call void @_ZNSt5stackIxSt5dequeIxSaIxEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %5) #4
  call void @llvm.lifetime.end.p0(i64 80, ptr %5) #4
  br label %61

61:                                               ; preds = %60
  %62 = load ptr, ptr %6, align 8
  %63 = load i32, ptr %7, align 4
  %64 = insertvalue { ptr, i32 } poison, ptr %62, 0
  %65 = insertvalue { ptr, i32 } %64, i32 %63, 1
  resume { ptr, i32 } %65
}

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIxSt5dequeIxSaIxEEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIxSt5dequeIxSaIxEEE4pushERKx(ptr noundef nonnull align 8 dereferenceable(80), ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt5stackIxSt5dequeIxSaIxEEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIxSt5dequeIxSaIxEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt3setIxSt4lessIxESaIxEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(48)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIxSt5dequeIxSaIxEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEE9push_backERKx(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setIxSt4lessIxESaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorIxEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 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
declare dso_local noundef i64 @_ZNSt3setIxSt4lessIxESaIxEE5eraseERKx(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIxSt5dequeIxSaIxEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #3 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 = !{!"long long", !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"

%"class.std::set" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<long long, long long, std::_Identity<long long>, std::less<long long>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<long long, long long, std::_Identity<long long>, std::less<long long>>::_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<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::stack" = type { %"class.std::deque" }
%"class.std::deque" = type { %"class.std::_Deque_base" }
%"class.std::_Deque_base" = type { %"struct.std::_Deque_base<long long, std::allocator<long long>>::_Deque_impl" }
%"struct.std::_Deque_base<long long, std::allocator<long long>>::_Deque_impl" = type { %"struct.std::_Deque_base<long long, std::allocator<long long>>::_Deque_impl_data" }
%"struct.std::_Deque_base<long long, std::allocator<long long>>::_Deque_impl_data" = type { ptr, i64, %"struct.std::_Deque_iterator", %"struct.std::_Deque_iterator" }
%"struct.std::_Deque_iterator" = type { ptr, ptr, ptr, ptr }
%"struct.std::_Rb_tree_const_iterator" = type { ptr }

@C = external dso_local local_unnamed_addr global [1000001 x i64], align 16
@graph = external dso_local global [1000001 x %"class.std::set"], align 16
@etour = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca i64, align 8
  %4 = alloca %"class.std::stack", align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 80, ptr nonnull %4) #4
  call void @_ZNSt5stackIxSt5dequeIxSaIxEEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(80) %4)
  invoke void @_ZNSt5stackIxSt5dequeIxSaIxEEE4pushERKx(ptr noundef nonnull align 8 dereferenceable(80) %4, ptr noundef nonnull align 8 dereferenceable(8) %3)
          to label %.preheader unwind label %15

.preheader:                                       ; preds = %2
  %8 = call noundef zeroext i1 @_ZNKSt5stackIxSt5dequeIxSaIxEEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %4)
  br i1 %8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader, %36
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #4
  %9 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIxSt5dequeIxSaIxEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) %4)
  %10 = load i64, ptr %9, align 8, !tbaa !5
  store i64 %10, ptr %5, align 8, !tbaa !5
  %11 = getelementptr inbounds [1000001 x i64], ptr @C, i64 0, i64 %10
  store i64 %1, ptr %11, align 8, !tbaa !5
  %12 = getelementptr inbounds [1000001 x %"class.std::set"], ptr @graph, i64 0, i64 %10
  %13 = call noundef zeroext i1 @_ZNKSt3setIxSt4lessIxESaIxEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(48) %12) #4
  br i1 %13, label %14, label %19

14:                                               ; preds = %.lr.ph
  call void @_ZNSt5stackIxSt5dequeIxSaIxEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %4)
  invoke void @_ZNSt6vectorIxSaIxEE9push_backERKx(ptr noundef nonnull align 8 dereferenceable(24) @etour, ptr noundef nonnull align 8 dereferenceable(8) %5)
          to label %36 unwind label %17

15:                                               ; preds = %2
  %16 = landingpad { ptr, i32 }
          cleanup
  br label %39

17:                                               ; preds = %14
  %18 = landingpad { ptr, i32 }
          cleanup
  br label %38

19:                                               ; preds = %.lr.ph
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %7) #4
  %20 = load i64, ptr %5, align 8, !tbaa !5
  %21 = getelementptr inbounds [1000001 x %"class.std::set"], ptr @graph, i64 0, i64 %20
  %22 = call ptr @_ZNKSt3setIxSt4lessIxESaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %21) #4
  store ptr %22, ptr %7, align 8
  %23 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorIxEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #4
  %24 = load i64, ptr %23, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %7) #4
  store i64 %24, ptr %6, align 8, !tbaa !5
  %25 = load i64, ptr %5, align 8, !tbaa !5
  %26 = getelementptr inbounds [1000001 x %"class.std::set"], ptr @graph, i64 0, i64 %25
  %27 = invoke noundef i64 @_ZNSt3setIxSt4lessIxESaIxEE5eraseERKx(ptr noundef nonnull align 8 dereferenceable(48) %26, ptr noundef nonnull align 8 dereferenceable(8) %6)
          to label %28 unwind label %34

28:                                               ; preds = %19
  %29 = load i64, ptr %6, align 8, !tbaa !5
  %30 = getelementptr inbounds [1000001 x %"class.std::set"], ptr @graph, i64 0, i64 %29
  %31 = invoke noundef i64 @_ZNSt3setIxSt4lessIxESaIxEE5eraseERKx(ptr noundef nonnull align 8 dereferenceable(48) %30, ptr noundef nonnull align 8 dereferenceable(8) %5)
          to label %32 unwind label %34

32:                                               ; preds = %28
  invoke void @_ZNSt5stackIxSt5dequeIxSaIxEEE4pushERKx(ptr noundef nonnull align 8 dereferenceable(80) %4, ptr noundef nonnull align 8 dereferenceable(8) %6)
          to label %33 unwind label %34

33:                                               ; preds = %32
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #4
  br label %36

34:                                               ; preds = %32, %28, %19
  %35 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #4
  br label %38

36:                                               ; preds = %14, %33
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #4
  %37 = call noundef zeroext i1 @_ZNKSt5stackIxSt5dequeIxSaIxEEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %4)
  br i1 %37, label %._crit_edge, label %.lr.ph, !llvm.loop !9

38:                                               ; preds = %34, %17
  %.pn = phi { ptr, i32 } [ %18, %17 ], [ %35, %34 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #4
  br label %39

._crit_edge:                                      ; preds = %36, %.preheader
  call void @_ZNSt5stackIxSt5dequeIxSaIxEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %4) #4
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %4) #4
  ret void

39:                                               ; preds = %38, %15
  %.pn.pn = phi { ptr, i32 } [ %.pn, %38 ], [ %16, %15 ]
  call void @_ZNSt5stackIxSt5dequeIxSaIxEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %4) #4
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %4) #4
  resume { ptr, i32 } %.pn.pn
}

; 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 uwtable
declare dso_local void @_ZNSt5stackIxSt5dequeIxSaIxEEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIxSt5dequeIxSaIxEEE4pushERKx(ptr noundef nonnull align 8 dereferenceable(80), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt5stackIxSt5dequeIxSaIxEEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIxSt5dequeIxSaIxEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt3setIxSt4lessIxESaIxEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIxSt5dequeIxSaIxEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEE9push_backERKx(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setIxSt4lessIxESaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorIxEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 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
declare dso_local noundef i64 @_ZNSt3setIxSt4lessIxESaIxEE5eraseERKx(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIxSt5dequeIxSaIxEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #3 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 = !{!"long long", !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,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass