; LLVM IR from TheAlgorithms/C-Plus-Plus :: graph (connected_components)

; 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.5" = type { %"struct.std::_Bvector_base" }
%"struct.std::_Bvector_base" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" = type { %"struct.std::_Bit_iterator", %"struct.std::_Bit_iterator", ptr }
%"struct.std::_Bit_iterator" = type { %"struct.std::_Bit_iterator_base.base", [4 x i8] }
%"struct.std::_Bit_iterator_base.base" = type <{ ptr, i32 }>
%"class.std::allocator.9" = type { i8 }
%"struct.std::_Bit_reference" = type { ptr, i64 }

; 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
declare dso_local void @_ZN5graph7exploreEPKSt6vectorIS0_IiSaIiEESaIS2_EEiPS0_IbSaIbEE(ptr noundef, i32 noundef, ptr noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN5graph22getConnectedComponentsEPKSt6vectorIS0_IiSaIiEESaIS2_EE(ptr noundef %0) #1 personality ptr @__gxx_personality_v0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca %"class.std::vector.5", align 8
  %6 = alloca i8, align 1
  %7 = alloca %"class.std::allocator.9", align 1
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca %"struct.std::_Bit_reference", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %12 = load ptr, ptr %2, align 8, !tbaa !5
  %13 = call noundef i64 @_ZNKSt6vectorIS_IiSaIiEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %12) #3
  %14 = trunc i64 %13 to i32
  store i32 %14, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 40, ptr %5) #3
  %15 = load i32, ptr %3, align 4, !tbaa !9
  %16 = sext i32 %15 to i64
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #3
  store i8 0, ptr %6, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #3
  call void @_ZNSaIbEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %7) #3
  invoke void @_ZNSt6vectorIbSaIbEEC2EmRKbRKS0_(ptr noundef nonnull align 8 dereferenceable(40) %5, i64 noundef %16, ptr noundef nonnull align 1 dereferenceable(1) %6, ptr noundef nonnull align 1 dereferenceable(1) %7)
          to label %17 unwind label %23

17:                                               ; preds = %1
  call void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %7) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %53, %17
  %19 = load i32, ptr %10, align 4, !tbaa !9
  %20 = load i32, ptr %3, align 4, !tbaa !9
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %27, label %22

22:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %57

23:                                               ; preds = %1
  %24 = landingpad { ptr, i32 }
          cleanup
  %25 = extractvalue { ptr, i32 } %24, 0
  store ptr %25, ptr %8, align 8
  %26 = extractvalue { ptr, i32 } %24, 1
  store i32 %26, ptr %9, align 4
  call void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %7) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #3
  br label %59

27:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 16, ptr %11) #3
  %28 = load i32, ptr %10, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = invoke { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %5, i64 noundef %29)
          to label %31 unwind label %44

31:                                               ; preds = %27
  %32 = getelementptr inbounds { ptr, i64 }, ptr %11, i32 0, i32 0
  %33 = extractvalue { ptr, i64 } %30, 0
  store ptr %33, ptr %32, align 8
  %34 = getelementptr inbounds { ptr, i64 }, ptr %11, i32 0, i32 1
  %35 = extractvalue { ptr, i64 } %30, 1
  store i64 %35, ptr %34, align 8
  %36 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %11) #3
  %37 = xor i1 %36, true
  call void @llvm.lifetime.end.p0(i64 16, ptr %11) #3
  br i1 %37, label %38, label %52

38:                                               ; preds = %31
  %39 = load ptr, ptr %2, align 8, !tbaa !5
  %40 = load i32, ptr %10, align 4, !tbaa !9
  invoke void @_ZN5graph7exploreEPKSt6vectorIS0_IiSaIiEESaIS2_EEiPS0_IbSaIbEE(ptr noundef %39, i32 noundef %40, ptr noundef %5)
          to label %41 unwind label %48

41:                                               ; preds = %38
  %42 = load i32, ptr %4, align 4, !tbaa !9
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %4, align 4, !tbaa !9
  br label %52

44:                                               ; preds = %27
  %45 = landingpad { ptr, i32 }
          cleanup
  %46 = extractvalue { ptr, i32 } %45, 0
  store ptr %46, ptr %8, align 8
  %47 = extractvalue { ptr, i32 } %45, 1
  store i32 %47, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 16, ptr %11) #3
  br label %56

48:                                               ; preds = %38
  %49 = landingpad { ptr, i32 }
          cleanup
  %50 = extractvalue { ptr, i32 } %49, 0
  store ptr %50, ptr %8, align 8
  %51 = extractvalue { ptr, i32 } %49, 1
  store i32 %51, ptr %9, align 4
  br label %56

52:                                               ; preds = %41, %31
  br label %53

53:                                               ; preds = %52
  %54 = load i32, ptr %10, align 4, !tbaa !9
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %10, align 4, !tbaa !9
  br label %18, !llvm.loop !13

56:                                               ; preds = %48, %44
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  call void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40) %5) #3
  br label %59

57:                                               ; preds = %22
  %58 = load i32, ptr %4, align 4, !tbaa !9
  call void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40) %5) #3
  call void @llvm.lifetime.end.p0(i64 40, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret i32 %58

59:                                               ; preds = %56, %23
  call void @llvm.lifetime.end.p0(i64 40, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %60

60:                                               ; preds = %59
  %61 = load ptr, ptr %8, align 8
  %62 = load i32, ptr %9, align 4
  %63 = insertvalue { ptr, i32 } poison, ptr %61, 0
  %64 = insertvalue { ptr, i32 } %63, i32 %62, 1
  resume { ptr, i32 } %64
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIS_IiSaIiEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSaIbEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIbSaIbEEC2EmRKbRKS0_(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1), ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40)) unnamed_addr #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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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::vector.5" = type { %"struct.std::_Bvector_base" }
%"struct.std::_Bvector_base" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" = type { %"struct.std::_Bit_iterator", %"struct.std::_Bit_iterator", ptr }
%"struct.std::_Bit_iterator" = type { %"struct.std::_Bit_iterator_base.base", [4 x i8] }
%"struct.std::_Bit_iterator_base.base" = type <{ ptr, i32 }>
%"class.std::allocator.9" = type { i8 }
%"struct.std::_Bit_reference" = type { ptr, i64 }

; 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
declare dso_local void @_ZN5graph7exploreEPKSt6vectorIS0_IiSaIiEESaIS2_EEiPS0_IbSaIbEE(ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN5graph22getConnectedComponentsEPKSt6vectorIS0_IiSaIiEESaIS2_EE(ptr noundef nonnull %0) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %2 = alloca %"class.std::vector.5", align 8
  %3 = alloca i8, align 1
  %4 = alloca %"class.std::allocator.9", align 1
  %5 = alloca %"struct.std::_Bit_reference", align 8
  %6 = tail call noundef i64 @_ZNKSt6vectorIS_IiSaIiEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  call void @llvm.lifetime.start.p0(i64 40, ptr nonnull %2) #3
  %sext = shl i64 %6, 32
  %7 = ashr exact i64 %sext, 32
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %3) #3
  store i8 0, ptr %3, align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %4) #3
  call void @_ZNSaIbEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #3
  invoke void @_ZNSt6vectorIbSaIbEEC2EmRKbRKS0_(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %7, ptr noundef nonnull align 1 dereferenceable(1) %3, ptr noundef nonnull align 1 dereferenceable(1) %4)
          to label %8 unwind label %12

8:                                                ; preds = %1
  %9 = trunc i64 %6 to i32
  call void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #3
  %10 = icmp sgt i32 %9, 0
  br i1 %10, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %8
  %11 = getelementptr inbounds i8, ptr %5, i64 8
  %wide.trip.count = and i64 %6, 2147483647
  br label %14

._crit_edge:                                      ; preds = %28, %8
  %.014.lcssa = phi i32 [ 0, %8 ], [ %.115, %28 ]
  call void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40) %2) #3
  call void @llvm.lifetime.end.p0(i64 40, ptr nonnull %2) #3
  ret i32 %.014.lcssa

12:                                               ; preds = %1
  %13 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #3
  br label %30

14:                                               ; preds = %.lr.ph, %28
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %28 ]
  %.01420 = phi i32 [ 0, %.lr.ph ], [ %.115, %28 ]
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %5) #3
  %15 = invoke { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %indvars.iv)
          to label %16 unwind label %24

16:                                               ; preds = %14
  %17 = extractvalue { ptr, i64 } %15, 0
  store ptr %17, ptr %5, align 8
  %18 = extractvalue { ptr, i64 } %15, 1
  store i64 %18, ptr %11, align 8
  %19 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %5) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %5) #3
  br i1 %19, label %28, label %20

20:                                               ; preds = %16
  %21 = trunc nuw nsw i64 %indvars.iv to i32
  invoke void @_ZN5graph7exploreEPKSt6vectorIS0_IiSaIiEESaIS2_EEiPS0_IbSaIbEE(ptr noundef nonnull %0, i32 noundef %21, ptr noundef nonnull %2)
          to label %22 unwind label %26

22:                                               ; preds = %20
  %23 = add nsw i32 %.01420, 1
  br label %28

24:                                               ; preds = %14
  %25 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %5) #3
  br label %29

26:                                               ; preds = %20
  %27 = landingpad { ptr, i32 }
          cleanup
  br label %29

28:                                               ; preds = %16, %22
  %.115 = phi i32 [ %23, %22 ], [ %.01420, %16 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %14, !llvm.loop !9

29:                                               ; preds = %26, %24
  %.pn = phi { ptr, i32 } [ %27, %26 ], [ %25, %24 ]
  call void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40) %2) #3
  br label %30

30:                                               ; preds = %29, %12
  %.pn.pn = phi { ptr, i32 } [ %.pn, %29 ], [ %13, %12 ]
  call void @llvm.lifetime.end.p0(i64 40, ptr nonnull %2) #3
  resume { ptr, i32 } %.pn.pn
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIS_IiSaIiEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSaIbEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIbSaIbEEC2EmRKbRKS0_(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1), ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40)) 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 = { 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 = !{!"bool", !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,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass