; LLVM IR from vmartinv/eldiego :: grafos/biconexas.bridge.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::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 }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<edge, std::allocator<edge>>::_Vector_impl" }
%"struct.std::_Vector_base<edge, std::allocator<edge>>::_Vector_impl" = type { %"struct.std::_Vector_base<edge, std::allocator<edge>>::_Vector_impl_data" }
%"struct.std::_Vector_base<edge, std::allocator<edge>>::_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<int, std::allocator<int>>::_Deque_impl" }
%"struct.std::_Deque_base<int, std::allocator<int>>::_Deque_impl" = type { %"struct.std::_Deque_base<int, std::allocator<int>>::_Deque_impl_data" }
%"struct.std::_Deque_base<int, std::allocator<int>>::_Deque_impl_data" = type { ptr, i64, %"struct.std::_Deque_iterator", %"struct.std::_Deque_iterator" }
%"struct.std::_Deque_iterator" = type { ptr, ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%struct.edge = type { i32, i32, i32, i8 }

@G = external dso_local global [1010 x %"class.std::vector"], align 16
@e = external dso_local global %"class.std::vector.0", align 8
@d = external dso_local global [1010 x i32], align 16
@b = external dso_local global [1010 x i32], align 16
@t = external dso_local global i32, align 4
@nbc = external dso_local global i32, align 4
@comp = external dso_local global [1010 x i32], align 16
@st = external dso_local global %"class.std::stack", align 8

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %9 = load i32, ptr @t, align 4, !tbaa !5
  %10 = add nsw i32 %9, 1
  store i32 %10, ptr @t, align 4, !tbaa !5
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [1010 x i32], ptr @d, i64 0, i64 %12
  store i32 %9, ptr %13, align 4, !tbaa !5
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [1010 x i32], ptr @b, i64 0, i64 %15
  store i32 %9, ptr %16, align 4, !tbaa !5
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = icmp ne i32 %17, -1
  %19 = zext i1 %18 to i32
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [1010 x i32], ptr @comp, i64 0, i64 %21
  store i32 %19, ptr %22, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [1010 x %"class.std::vector"], ptr @G, i64 0, i64 %24
  %26 = call ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %25) #4
  %27 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %5, i32 0, i32 0
  store ptr %26, ptr %27, align 8
  br label %28

28:                                               ; preds = %152, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [1010 x %"class.std::vector"], ptr @G, i64 0, i64 %30
  %32 = call ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %31) #4
  %33 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  store ptr %32, ptr %33, align 8
  %34 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPiSt6vectorIiSaIiEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br i1 %34, label %36, label %35

35:                                               ; preds = %28
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %154

36:                                               ; preds = %28
  %37 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %38 = load i32, ptr %37, align 4, !tbaa !5
  %39 = load i32, ptr %4, align 4, !tbaa !5
  %40 = icmp ne i32 %38, %39
  br i1 %40, label %41, label %151

41:                                               ; preds = %36
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %42 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %43 = load i32, ptr %42, align 4, !tbaa !5
  %44 = sext i32 %43 to i64
  %45 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorI4edgeSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @e, i64 noundef %44) #4
  %46 = getelementptr inbounds %struct.edge, ptr %45, i32 0, i32 0
  %47 = load i32, ptr %46, align 4, !tbaa !9
  %48 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %49 = load i32, ptr %48, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorI4edgeSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @e, i64 noundef %50) #4
  %52 = getelementptr inbounds %struct.edge, ptr %51, i32 0, i32 1
  %53 = load i32, ptr %52, align 4, !tbaa !12
  %54 = xor i32 %47, %53
  %55 = load i32, ptr %3, align 4, !tbaa !5
  %56 = xor i32 %54, %55
  store i32 %56, ptr %7, align 4, !tbaa !5
  %57 = load i32, ptr %7, align 4, !tbaa !5
  %58 = sext i32 %57 to i64
  %59 = getelementptr inbounds [1010 x i32], ptr @d, i64 0, i64 %58
  %60 = load i32, ptr %59, align 4, !tbaa !5
  %61 = icmp eq i32 %60, -1
  br i1 %61, label %62, label %126

62:                                               ; preds = %41
  %63 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  call void @_ZNSt5stackIiSt5dequeIiSaIiEEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(80) @st, ptr noundef nonnull align 4 dereferenceable(4) %63)
  %64 = load i32, ptr %7, align 4, !tbaa !5
  %65 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %66 = load i32, ptr %65, align 4, !tbaa !5
  call void @_Z3dfsii(i32 noundef %64, i32 noundef %66)
  %67 = load i32, ptr %7, align 4, !tbaa !5
  %68 = sext i32 %67 to i64
  %69 = getelementptr inbounds [1010 x i32], ptr @b, i64 0, i64 %68
  %70 = load i32, ptr %69, align 4, !tbaa !5
  %71 = load i32, ptr %3, align 4, !tbaa !5
  %72 = sext i32 %71 to i64
  %73 = getelementptr inbounds [1010 x i32], ptr @d, i64 0, i64 %72
  %74 = load i32, ptr %73, align 4, !tbaa !5
  %75 = icmp sgt i32 %70, %74
  br i1 %75, label %76, label %82

76:                                               ; preds = %62
  %77 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %78 = load i32, ptr %77, align 4, !tbaa !5
  %79 = sext i32 %78 to i64
  %80 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorI4edgeSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @e, i64 noundef %79) #4
  %81 = getelementptr inbounds %struct.edge, ptr %80, i32 0, i32 3
  store i8 1, ptr %81, align 4, !tbaa !13
  br label %82

82:                                               ; preds = %76, %62
  %83 = load i32, ptr %7, align 4, !tbaa !5
  %84 = sext i32 %83 to i64
  %85 = getelementptr inbounds [1010 x i32], ptr @b, i64 0, i64 %84
  %86 = load i32, ptr %85, align 4, !tbaa !5
  %87 = load i32, ptr %3, align 4, !tbaa !5
  %88 = sext i32 %87 to i64
  %89 = getelementptr inbounds [1010 x i32], ptr @d, i64 0, i64 %88
  %90 = load i32, ptr %89, align 4, !tbaa !5
  %91 = icmp sge i32 %86, %90
  br i1 %91, label %92, label %114

92:                                               ; preds = %82
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  br label %93

93:                                               ; preds = %101, %92
  %94 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5stackIiSt5dequeIiSaIiEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) @st)
  %95 = load i32, ptr %94, align 4, !tbaa !5
  store i32 %95, ptr %8, align 4, !tbaa !5
  call void @_ZNSt5stackIiSt5dequeIiSaIiEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) @st)
  %96 = load i32, ptr @nbc, align 4, !tbaa !5
  %97 = load i32, ptr %8, align 4, !tbaa !5
  %98 = sext i32 %97 to i64
  %99 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorI4edgeSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @e, i64 noundef %98) #4
  %100 = getelementptr inbounds %struct.edge, ptr %99, i32 0, i32 2
  store i32 %96, ptr %100, align 4, !tbaa !14
  br label %101

101:                                              ; preds = %93
  %102 = load i32, ptr %8, align 4, !tbaa !5
  %103 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %104 = load i32, ptr %103, align 4, !tbaa !5
  %105 = icmp ne i32 %102, %104
  br i1 %105, label %93, label %106, !llvm.loop !15

106:                                              ; preds = %101
  %107 = load i32, ptr @nbc, align 4, !tbaa !5
  %108 = add nsw i32 %107, 1
  store i32 %108, ptr @nbc, align 4, !tbaa !5
  %109 = load i32, ptr %3, align 4, !tbaa !5
  %110 = sext i32 %109 to i64
  %111 = getelementptr inbounds [1010 x i32], ptr @comp, i64 0, i64 %110
  %112 = load i32, ptr %111, align 4, !tbaa !5
  %113 = add nsw i32 %112, 1
  store i32 %113, ptr %111, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %114

114:                                              ; preds = %106, %82
  %115 = load i32, ptr %3, align 4, !tbaa !5
  %116 = sext i32 %115 to i64
  %117 = getelementptr inbounds [1010 x i32], ptr @b, i64 0, i64 %116
  %118 = load i32, ptr %7, align 4, !tbaa !5
  %119 = sext i32 %118 to i64
  %120 = getelementptr inbounds [1010 x i32], ptr @b, i64 0, i64 %119
  %121 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %117, ptr noundef nonnull align 4 dereferenceable(4) %120)
  %122 = load i32, ptr %121, align 4, !tbaa !5
  %123 = load i32, ptr %3, align 4, !tbaa !5
  %124 = sext i32 %123 to i64
  %125 = getelementptr inbounds [1010 x i32], ptr @b, i64 0, i64 %124
  store i32 %122, ptr %125, align 4, !tbaa !5
  br label %150

126:                                              ; preds = %41
  %127 = load i32, ptr %7, align 4, !tbaa !5
  %128 = sext i32 %127 to i64
  %129 = getelementptr inbounds [1010 x i32], ptr @d, i64 0, i64 %128
  %130 = load i32, ptr %129, align 4, !tbaa !5
  %131 = load i32, ptr %3, align 4, !tbaa !5
  %132 = sext i32 %131 to i64
  %133 = getelementptr inbounds [1010 x i32], ptr @d, i64 0, i64 %132
  %134 = load i32, ptr %133, align 4, !tbaa !5
  %135 = icmp slt i32 %130, %134
  br i1 %135, label %136, label %149

136:                                              ; preds = %126
  %137 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  call void @_ZNSt5stackIiSt5dequeIiSaIiEEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(80) @st, ptr noundef nonnull align 4 dereferenceable(4) %137)
  %138 = load i32, ptr %3, align 4, !tbaa !5
  %139 = sext i32 %138 to i64
  %140 = getelementptr inbounds [1010 x i32], ptr @b, i64 0, i64 %139
  %141 = load i32, ptr %7, align 4, !tbaa !5
  %142 = sext i32 %141 to i64
  %143 = getelementptr inbounds [1010 x i32], ptr @d, i64 0, i64 %142
  %144 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %140, ptr noundef nonnull align 4 dereferenceable(4) %143)
  %145 = load i32, ptr %144, align 4, !tbaa !5
  %146 = load i32, ptr %3, align 4, !tbaa !5
  %147 = sext i32 %146 to i64
  %148 = getelementptr inbounds [1010 x i32], ptr @b, i64 0, i64 %147
  store i32 %145, ptr %148, align 4, !tbaa !5
  br label %149

149:                                              ; preds = %136, %126
  br label %150

150:                                              ; preds = %149, %114
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  br label %151

151:                                              ; preds = %150, %36
  br label %152

152:                                              ; preds = %151
  %153 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  br label %28, !llvm.loop !17

154:                                              ; preds = %35
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPiSt6vectorIiSaIiEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorI4edgeSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIiSt5dequeIiSaIiEEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(80), ptr noundef nonnull align 4 dereferenceable(4)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5stackIiSt5dequeIiSaIiEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIiSt5dequeIiSaIiEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80)) #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: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!10, !6, i64 0}
!10 = !{!"_ZTS4edge", !6, i64 0, !6, i64 4, !6, i64 8, !11, i64 12}
!11 = !{!"bool", !7, i64 0}
!12 = !{!10, !6, i64 4}
!13 = !{!10, !11, i64 12}
!14 = !{!10, !6, i64 8}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = distinct !{!17, !16}


; 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::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 }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<edge, std::allocator<edge>>::_Vector_impl" }
%"struct.std::_Vector_base<edge, std::allocator<edge>>::_Vector_impl" = type { %"struct.std::_Vector_base<edge, std::allocator<edge>>::_Vector_impl_data" }
%"struct.std::_Vector_base<edge, std::allocator<edge>>::_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<int, std::allocator<int>>::_Deque_impl" }
%"struct.std::_Deque_base<int, std::allocator<int>>::_Deque_impl" = type { %"struct.std::_Deque_base<int, std::allocator<int>>::_Deque_impl_data" }
%"struct.std::_Deque_base<int, std::allocator<int>>::_Deque_impl_data" = type { ptr, i64, %"struct.std::_Deque_iterator", %"struct.std::_Deque_iterator" }
%"struct.std::_Deque_iterator" = type { ptr, ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@G = external dso_local global [1010 x %"class.std::vector"], align 16
@e = external dso_local global %"class.std::vector.0", align 8
@d = external dso_local global [1010 x i32], align 16
@b = external dso_local global [1010 x i32], align 16
@t = external dso_local local_unnamed_addr global i32, align 4
@nbc = external dso_local local_unnamed_addr global i32, align 4
@comp = external dso_local local_unnamed_addr global [1010 x i32], align 16
@st = external dso_local global %"class.std::stack", align 8

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %4 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %5 = load i32, ptr @t, align 4, !tbaa !5
  %6 = add nsw i32 %5, 1
  store i32 %6, ptr @t, align 4, !tbaa !5
  %7 = sext i32 %0 to i64
  %8 = getelementptr inbounds [1010 x i32], ptr @d, i64 0, i64 %7
  store i32 %5, ptr %8, align 4, !tbaa !5
  %9 = getelementptr inbounds [1010 x i32], ptr @b, i64 0, i64 %7
  store i32 %5, ptr %9, align 4, !tbaa !5
  %10 = icmp ne i32 %1, -1
  %11 = zext i1 %10 to i32
  %12 = getelementptr inbounds [1010 x i32], ptr @comp, i64 0, i64 %7
  store i32 %11, ptr %12, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %13 = getelementptr inbounds [1010 x %"class.std::vector"], ptr @G, i64 0, i64 %7
  %14 = tail call ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %13) #4
  store ptr %14, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %15 = tail call ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %13) #4
  store ptr %15, ptr %4, align 8
  %16 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPiSt6vectorIiSaIiEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  br i1 %16, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %74, %2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  ret void

.lr.ph:                                           ; preds = %2, %74
  %17 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %.not = icmp eq i32 %18, %1
  br i1 %.not, label %74, label %19

19:                                               ; preds = %.lr.ph
  %20 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorI4edgeSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @e, i64 noundef %22) #4
  %24 = load i32, ptr %23, align 4, !tbaa !9
  %25 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorI4edgeSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @e, i64 noundef %27) #4
  %29 = getelementptr inbounds i8, ptr %28, i64 4
  %30 = load i32, ptr %29, align 4, !tbaa !12
  %31 = xor i32 %24, %30
  %32 = xor i32 %31, %0
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [1010 x i32], ptr @d, i64 0, i64 %33
  %35 = load i32, ptr %34, align 4, !tbaa !5
  %36 = icmp eq i32 %35, -1
  br i1 %36, label %37, label %67

37:                                               ; preds = %19
  %38 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  call void @_ZNSt5stackIiSt5dequeIiSaIiEEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(80) @st, ptr noundef nonnull align 4 dereferenceable(4) %38)
  %39 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  %40 = load i32, ptr %39, align 4, !tbaa !5
  call void @_Z3dfsii(i32 noundef %32, i32 noundef %40)
  %41 = getelementptr inbounds [1010 x i32], ptr @b, i64 0, i64 %33
  %42 = load i32, ptr %41, align 4, !tbaa !5
  %43 = load i32, ptr %8, align 4, !tbaa !5
  %44 = icmp sgt i32 %42, %43
  br i1 %44, label %45, label %51

45:                                               ; preds = %37
  %46 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  %47 = load i32, ptr %46, align 4, !tbaa !5
  %48 = sext i32 %47 to i64
  %49 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorI4edgeSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @e, i64 noundef %48) #4
  %50 = getelementptr inbounds i8, ptr %49, i64 12
  store i8 1, ptr %50, align 4, !tbaa !13
  %.pre = load i32, ptr %41, align 4, !tbaa !5
  %.pre27 = load i32, ptr %8, align 4, !tbaa !5
  br label %51

51:                                               ; preds = %45, %37
  %52 = phi i32 [ %.pre27, %45 ], [ %43, %37 ]
  %53 = phi i32 [ %.pre, %45 ], [ %42, %37 ]
  %.not25 = icmp slt i32 %53, %52
  br i1 %.not25, label %.sink.split, label %.preheader

.preheader:                                       ; preds = %51, %.preheader
  %54 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5stackIiSt5dequeIiSaIiEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) @st)
  %55 = load i32, ptr %54, align 4, !tbaa !5
  call void @_ZNSt5stackIiSt5dequeIiSaIiEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) @st)
  %56 = load i32, ptr @nbc, align 4, !tbaa !5
  %57 = sext i32 %55 to i64
  %58 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorI4edgeSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @e, i64 noundef %57) #4
  %59 = getelementptr inbounds i8, ptr %58, i64 8
  store i32 %56, ptr %59, align 4, !tbaa !14
  %60 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  %61 = load i32, ptr %60, align 4, !tbaa !5
  %.not26 = icmp eq i32 %55, %61
  br i1 %.not26, label %62, label %.preheader, !llvm.loop !15

62:                                               ; preds = %.preheader
  %63 = load i32, ptr @nbc, align 4, !tbaa !5
  %64 = add nsw i32 %63, 1
  store i32 %64, ptr @nbc, align 4, !tbaa !5
  %65 = load i32, ptr %12, align 4, !tbaa !5
  %66 = add nsw i32 %65, 1
  store i32 %66, ptr %12, align 4, !tbaa !5
  br label %.sink.split

67:                                               ; preds = %19
  %68 = load i32, ptr %8, align 4, !tbaa !5
  %69 = icmp slt i32 %35, %68
  br i1 %69, label %70, label %74

70:                                               ; preds = %67
  %71 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  call void @_ZNSt5stackIiSt5dequeIiSaIiEEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(80) @st, ptr noundef nonnull align 4 dereferenceable(4) %71)
  br label %.sink.split

.sink.split:                                      ; preds = %51, %62, %70
  %.sink = phi ptr [ %34, %70 ], [ %41, %62 ], [ %41, %51 ]
  %72 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %9, ptr noundef nonnull align 4 dereferenceable(4) %.sink)
  %73 = load i32, ptr %72, align 4, !tbaa !5
  store i32 %73, ptr %9, align 4, !tbaa !5
  br label %74

74:                                               ; preds = %.sink.split, %67, %.lr.ph
  %75 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %76 = call ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %13) #4
  store ptr %76, ptr %4, align 8
  %77 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPiSt6vectorIiSaIiEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  br i1 %77, label %.lr.ph, label %._crit_edge, !llvm.loop !17
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE5beginEv(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_cxxneIPiSt6vectorIiSaIiEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorI4edgeSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIiSt5dequeIiSaIiEEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(80), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt5stackIiSt5dequeIiSaIiEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIiSt5dequeIiSaIiEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80)) 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 nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!10, !6, i64 0}
!10 = !{!"_ZTS4edge", !6, i64 0, !6, i64 4, !6, i64 8, !11, i64 12}
!11 = !{!"bool", !7, i64 0}
!12 = !{!10, !6, i64 4}
!13 = !{!10, !11, i64 12}
!14 = !{!10, !6, i64 8}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = distinct !{!17, !16}


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