; LLVM IR from xirc/cp-algorithm :: aoj/GRL/GRL3A (main)

; 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::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%class.ArticulationPoints = type { i64, i64, %"class.std::vector", i64, %"class.std::vector.0", %"class.std::vector.0", %"class.std::vector.0" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::vector<ArticulationPoints::edge>, std::allocator<std::vector<ArticulationPoints::edge>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<ArticulationPoints::edge>, std::allocator<std::vector<ArticulationPoints::edge>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<ArticulationPoints::edge>, std::allocator<std::vector<ArticulationPoints::edge>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<ArticulationPoints::edge>, std::allocator<std::vector<ArticulationPoints::edge>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<unsigned long, std::allocator<unsigned long>>::_Vector_impl" }
%"struct.std::_Vector_base<unsigned long, std::allocator<unsigned long>>::_Vector_impl" = type { %"struct.std::_Vector_base<unsigned long, std::allocator<unsigned long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<unsigned long, std::allocator<unsigned long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca %class.ArticulationPoints, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca %"class.std::vector.0", align 8
  %11 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %12 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %13 = alloca ptr, align 8
  %14 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %15 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %16 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  %17 = call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %18 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %19 = getelementptr i8, ptr %18, i64 -24
  %20 = load i64, ptr %19, align 8
  %21 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %20
  %22 = call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %21, ptr noundef null)
  %23 = load ptr, ptr @_ZSt4cout, align 8, !tbaa !5
  %24 = getelementptr i8, ptr %23, i64 -24
  %25 = load i64, ptr %24, align 8
  %26 = getelementptr inbounds i8, ptr @_ZSt4cout, i64 %25
  %27 = call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %26, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #7
  %28 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %29 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %28, ptr noundef nonnull align 4 dereferenceable(4) %3)
  call void @llvm.lifetime.start.p0(i64 120, ptr %4) #7
  %30 = load i32, ptr %2, align 4, !tbaa !8
  %31 = sext i32 %30 to i64
  call void @_ZN18ArticulationPointsC2Em(ptr noundef nonnull align 8 dereferenceable(120) %4, i64 noundef %31)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #7
  store i32 0, ptr %5, align 4, !tbaa !8
  br label %32

32:                                               ; preds = %47, %0
  %33 = load i32, ptr %5, align 4, !tbaa !8
  %34 = load i32, ptr %3, align 4, !tbaa !8
  %35 = icmp slt i32 %33, %34
  br i1 %35, label %37, label %36

36:                                               ; preds = %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #7
  br label %54

37:                                               ; preds = %32
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #7
  %38 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %6)
          to label %39 unwind label %50

39:                                               ; preds = %37
  %40 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %38, ptr noundef nonnull align 4 dereferenceable(4) %7)
          to label %41 unwind label %50

41:                                               ; preds = %39
  %42 = load i32, ptr %6, align 4, !tbaa !8
  %43 = sext i32 %42 to i64
  %44 = load i32, ptr %7, align 4, !tbaa !8
  %45 = sext i32 %44 to i64
  invoke void @_ZN18ArticulationPoints8add_edgeEmm(ptr noundef nonnull align 8 dereferenceable(120) %4, i64 noundef %43, i64 noundef %45)
          to label %46 unwind label %50

46:                                               ; preds = %41
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #7
  br label %47

47:                                               ; preds = %46
  %48 = load i32, ptr %5, align 4, !tbaa !8
  %49 = add nsw i32 %48, 1
  store i32 %49, ptr %5, align 4, !tbaa !8
  br label %32, !llvm.loop !11

50:                                               ; preds = %41, %39, %37
  %51 = landingpad { ptr, i32 }
          cleanup
  %52 = extractvalue { ptr, i32 } %51, 0
  store ptr %52, ptr %8, align 8
  %53 = extractvalue { ptr, i32 } %51, 1
  store i32 %53, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #7
  br label %100

54:                                               ; preds = %36
  call void @llvm.lifetime.start.p0(i64 24, ptr %10) #7
  invoke void @_ZN18ArticulationPoints5solveEv(ptr dead_on_unwind writable sret(%"class.std::vector.0") align 8 %10, ptr noundef nonnull align 8 dereferenceable(120) %4)
          to label %55 unwind label %74

55:                                               ; preds = %54
  %56 = call ptr @_ZNSt6vectorImSaImEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %10) #7
  %57 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %11, i32 0, i32 0
  store ptr %56, ptr %57, align 8
  %58 = call ptr @_ZNSt6vectorImSaImEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %10) #7
  %59 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %12, i32 0, i32 0
  store ptr %58, ptr %59, align 8
  %60 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %11, i32 0, i32 0
  %61 = load ptr, ptr %60, align 8
  %62 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %12, i32 0, i32 0
  %63 = load ptr, ptr %62, align 8
  invoke void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEEEvT_S7_(ptr %61, ptr %63)
          to label %64 unwind label %78

64:                                               ; preds = %55
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #7
  store ptr %10, ptr %13, align 8, !tbaa !13
  call void @llvm.lifetime.start.p0(i64 8, ptr %14) #7
  %65 = load ptr, ptr %13, align 8, !tbaa !13
  %66 = call ptr @_ZNSt6vectorImSaImEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %65) #7
  %67 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %14, i32 0, i32 0
  store ptr %66, ptr %67, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %15) #7
  %68 = load ptr, ptr %13, align 8, !tbaa !13
  %69 = call ptr @_ZNSt6vectorImSaImEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %68) #7
  %70 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %15, i32 0, i32 0
  store ptr %69, ptr %70, align 8
  br label %71

71:                                               ; preds = %90, %64
  %72 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPmSt6vectorImSaImEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %14, ptr noundef nonnull align 8 dereferenceable(8) %15) #7
  br i1 %72, label %82, label %73

73:                                               ; preds = %71
  call void @llvm.lifetime.end.p0(i64 8, ptr %15) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %14) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #7
  br label %96

74:                                               ; preds = %54
  %75 = landingpad { ptr, i32 }
          cleanup
  %76 = extractvalue { ptr, i32 } %75, 0
  store ptr %76, ptr %8, align 8
  %77 = extractvalue { ptr, i32 } %75, 1
  store i32 %77, ptr %9, align 4
  br label %99

78:                                               ; preds = %55
  %79 = landingpad { ptr, i32 }
          cleanup
  %80 = extractvalue { ptr, i32 } %79, 0
  store ptr %80, ptr %8, align 8
  %81 = extractvalue { ptr, i32 } %79, 1
  store i32 %81, ptr %9, align 4
  br label %98

82:                                               ; preds = %71
  call void @llvm.lifetime.start.p0(i64 8, ptr %16) #7
  %83 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %14) #7
  %84 = load i64, ptr %83, align 8, !tbaa !15
  store i64 %84, ptr %16, align 8, !tbaa !15
  %85 = load i64, ptr %16, align 8, !tbaa !15
  %86 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEm(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %85)
          to label %87 unwind label %92

87:                                               ; preds = %82
  %88 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %86, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
          to label %89 unwind label %92

89:                                               ; preds = %87
  call void @llvm.lifetime.end.p0(i64 8, ptr %16) #7
  br label %90

90:                                               ; preds = %89
  %91 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %14) #7
  br label %71

92:                                               ; preds = %87, %82
  %93 = landingpad { ptr, i32 }
          cleanup
  %94 = extractvalue { ptr, i32 } %93, 0
  store ptr %94, ptr %8, align 8
  %95 = extractvalue { ptr, i32 } %93, 1
  store i32 %95, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %16) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %15) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %14) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #7
  br label %98

96:                                               ; preds = %73
  store i32 0, ptr %1, align 4
  call void @_ZNSt6vectorImSaImEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %10) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr %10) #7
  call void @_ZN18ArticulationPointsD2Ev(ptr noundef nonnull align 8 dereferenceable(120) %4) #7
  call void @llvm.lifetime.end.p0(i64 120, ptr %4) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #7
  %97 = load i32, ptr %1, align 4
  ret i32 %97

98:                                               ; preds = %92, %78
  call void @_ZNSt6vectorImSaImEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %10) #7
  br label %99

99:                                               ; preds = %98, %74
  call void @llvm.lifetime.end.p0(i64 24, ptr %10) #7
  br label %100

100:                                              ; preds = %99, %50
  call void @_ZN18ArticulationPointsD2Ev(ptr noundef nonnull align 8 dereferenceable(120) %4) #7
  call void @llvm.lifetime.end.p0(i64 120, ptr %4) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #7
  br label %101

101:                                              ; preds = %100
  %102 = load ptr, ptr %8, align 8
  %103 = load i32, ptr %9, align 4
  %104 = insertvalue { ptr, i32 } poison, ptr %102, 0
  %105 = insertvalue { ptr, i32 } %104, i32 %103, 1
  resume { ptr, i32 } %105
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN18ArticulationPointsC2Em(ptr noundef nonnull align 8 dereferenceable(120), i64 noundef) unnamed_addr #4 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN18ArticulationPoints8add_edgeEmm(ptr noundef nonnull align 8 dereferenceable(120), i64 noundef, i64 noundef) #4 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN18ArticulationPoints5solveEv(ptr dead_on_unwind noalias writable sret(%"class.std::vector.0") align 8, ptr noundef nonnull align 8 dereferenceable(120)) #4 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEEEvT_S7_(ptr, ptr) #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorImSaImEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorImSaImEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPmSt6vectorImSaImEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #6

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

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

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorImSaImEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN18ArticulationPointsD2Ev(ptr noundef nonnull align 8 dereferenceable(120)) unnamed_addr #6 align 2

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 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 #5 = { 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" }
attributes #6 = { 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 #7 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !14, i64 0}
!14 = !{!"any pointer", !10, i64 0}
!15 = !{!16, !16, i64 0}
!16 = !{!"long", !10, 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::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%class.ArticulationPoints = type { i64, i64, %"class.std::vector", i64, %"class.std::vector.0", %"class.std::vector.0", %"class.std::vector.0" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::vector<ArticulationPoints::edge>, std::allocator<std::vector<ArticulationPoints::edge>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<ArticulationPoints::edge>, std::allocator<std::vector<ArticulationPoints::edge>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<ArticulationPoints::edge>, std::allocator<std::vector<ArticulationPoints::edge>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<ArticulationPoints::edge>, std::allocator<std::vector<ArticulationPoints::edge>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<unsigned long, std::allocator<unsigned long>>::_Vector_impl" }
%"struct.std::_Vector_base<unsigned long, std::allocator<unsigned long>>::_Vector_impl" = type { %"struct.std::_Vector_base<unsigned long, std::allocator<unsigned long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<unsigned long, std::allocator<unsigned long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca %class.ArticulationPoints, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %"class.std::vector.0", align 8
  %7 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %8 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %9 = tail call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %10 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %11 = getelementptr i8, ptr %10, i64 -24
  %12 = load i64, ptr %11, align 8
  %13 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %12
  %14 = tail call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %13, ptr noundef null)
  %15 = load ptr, ptr @_ZSt4cout, align 8, !tbaa !5
  %16 = getelementptr i8, ptr %15, i64 -24
  %17 = load i64, ptr %16, align 8
  %18 = getelementptr inbounds i8, ptr @_ZSt4cout, i64 %17
  %19 = tail call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %18, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #7
  %20 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %21 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %20, ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.start.p0(i64 120, ptr nonnull %3) #7
  %22 = load i32, ptr %1, align 4, !tbaa !8
  %23 = sext i32 %22 to i64
  call void @_ZN18ArticulationPointsC2Em(ptr noundef nonnull align 8 dereferenceable(120) %3, i64 noundef %23)
  %24 = load i32, ptr %2, align 4, !tbaa !8
  %25 = icmp sgt i32 %24, 0
  br i1 %25, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %34, %0
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %6) #7
  invoke void @_ZN18ArticulationPoints5solveEv(ptr dead_on_unwind nonnull writable sret(%"class.std::vector.0") align 8 %6, ptr noundef nonnull align 8 dereferenceable(120) %3)
          to label %40 unwind label %47

.lr.ph:                                           ; preds = %0, %34
  %.016 = phi i32 [ %35, %34 ], [ 0, %0 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #7
  %26 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %4)
          to label %27 unwind label %38

27:                                               ; preds = %.lr.ph
  %28 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %26, ptr noundef nonnull align 4 dereferenceable(4) %5)
          to label %29 unwind label %38

29:                                               ; preds = %27
  %30 = load i32, ptr %4, align 4, !tbaa !8
  %31 = sext i32 %30 to i64
  %32 = load i32, ptr %5, align 4, !tbaa !8
  %33 = sext i32 %32 to i64
  invoke void @_ZN18ArticulationPoints8add_edgeEmm(ptr noundef nonnull align 8 dereferenceable(120) %3, i64 noundef %31, i64 noundef %33)
          to label %34 unwind label %38

34:                                               ; preds = %29
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #7
  %35 = add nuw nsw i32 %.016, 1
  %36 = load i32, ptr %2, align 4, !tbaa !8
  %37 = icmp slt i32 %35, %36
  br i1 %37, label %.lr.ph, label %._crit_edge, !llvm.loop !11

38:                                               ; preds = %29, %27, %.lr.ph
  %39 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #7
  br label %63

40:                                               ; preds = %._crit_edge
  %41 = call ptr @_ZNSt6vectorImSaImEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #7
  %42 = call ptr @_ZNSt6vectorImSaImEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #7
  invoke void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEEEvT_S7_(ptr %41, ptr %42)
          to label %43 unwind label %49

43:                                               ; preds = %40
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %7) #7
  %44 = call ptr @_ZNSt6vectorImSaImEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #7
  store ptr %44, ptr %7, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %8) #7
  %45 = call ptr @_ZNSt6vectorImSaImEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #7
  store ptr %45, ptr %8, align 8
  %46 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPmSt6vectorImSaImEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8) #7
  br i1 %46, label %.lr.ph18, label %._crit_edge19

._crit_edge19:                                    ; preds = %56, %43
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %8) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %7) #7
  call void @_ZNSt6vectorImSaImEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %6) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %6) #7
  call void @_ZN18ArticulationPointsD2Ev(ptr noundef nonnull align 8 dereferenceable(120) %3) #7
  call void @llvm.lifetime.end.p0(i64 120, ptr nonnull %3) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #7
  ret i32 0

47:                                               ; preds = %._crit_edge
  %48 = landingpad { ptr, i32 }
          cleanup
  br label %62

49:                                               ; preds = %40
  %50 = landingpad { ptr, i32 }
          cleanup
  br label %61

.lr.ph18:                                         ; preds = %43, %56
  %51 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #7
  %52 = load i64, ptr %51, align 8, !tbaa !13
  %53 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEm(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %52)
          to label %54 unwind label %59

54:                                               ; preds = %.lr.ph18
  %55 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %53, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
          to label %56 unwind label %59

56:                                               ; preds = %54
  %57 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #7
  %58 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPmSt6vectorImSaImEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8) #7
  br i1 %58, label %.lr.ph18, label %._crit_edge19

59:                                               ; preds = %54, %.lr.ph18
  %60 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %8) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %7) #7
  br label %61

61:                                               ; preds = %59, %49
  %.pn = phi { ptr, i32 } [ %60, %59 ], [ %50, %49 ]
  call void @_ZNSt6vectorImSaImEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %6) #7
  br label %62

62:                                               ; preds = %61, %47
  %.pn.pn = phi { ptr, i32 } [ %.pn, %61 ], [ %48, %47 ]
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %6) #7
  br label %63

63:                                               ; preds = %62, %38
  %.pn14 = phi { ptr, i32 } [ %39, %38 ], [ %.pn.pn, %62 ]
  call void @_ZN18ArticulationPointsD2Ev(ptr noundef nonnull align 8 dereferenceable(120) %3) #7
  call void @llvm.lifetime.end.p0(i64 120, ptr nonnull %3) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #7
  resume { ptr, i32 } %.pn14
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN18ArticulationPointsC2Em(ptr noundef nonnull align 8 dereferenceable(120), i64 noundef) unnamed_addr #4 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN18ArticulationPoints8add_edgeEmm(ptr noundef nonnull align 8 dereferenceable(120), i64 noundef, i64 noundef) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN18ArticulationPoints5solveEv(ptr dead_on_unwind noalias writable sret(%"class.std::vector.0") align 8, ptr noundef nonnull align 8 dereferenceable(120)) local_unnamed_addr #4 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEEEvT_S7_(ptr, ptr) local_unnamed_addr #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorImSaImEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorImSaImEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPmSt6vectorImSaImEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #6

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

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

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPmSt6vectorImSaImEEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorImSaImEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN18ArticulationPointsD2Ev(ptr noundef nonnull align 8 dereferenceable(120)) unnamed_addr #6 align 2

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 = { 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 #5 = { 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" }
attributes #6 = { 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 #7 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !14, i64 0}
!14 = !{!"long", !10, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass