; LLVM IR from codeIIEST/Algorithms :: Competitive Coding/Graphs/Graph_Search/DepthFIrstSearch (Depth_First_Search)

; 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_ostream" = type { ptr, %"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::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 }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef, i32 noundef, i32 noundef) #0

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

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z3DFSPSt6vectorIiSaIiEEi(ptr noundef, i32 noundef) #0

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #3 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #6
  store i32 5, ptr %2, align 4, !tbaa !5
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = zext i32 %7 to i64
  %9 = call ptr @llvm.stacksave.p0()
  store ptr %9, ptr %3, align 8
  %10 = alloca %"class.std::vector", i64 %8, align 16
  store i64 %8, ptr %4, align 8
  %11 = icmp eq i64 %8, 0
  br i1 %11, label %18, label %12

12:                                               ; preds = %0
  %13 = getelementptr inbounds %"class.std::vector", ptr %10, i64 %8
  br label %14

14:                                               ; preds = %14, %12
  %15 = phi ptr [ %10, %12 ], [ %16, %14 ]
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %15) #6
  %16 = getelementptr inbounds %"class.std::vector", ptr %15, i64 1
  %17 = icmp eq ptr %16, %13
  br i1 %17, label %18, label %14

18:                                               ; preds = %14, %0
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef %10, i32 noundef 0, i32 noundef 1)
          to label %19 unwind label %32

19:                                               ; preds = %18
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef %10, i32 noundef 0, i32 noundef 4)
          to label %20 unwind label %32

20:                                               ; preds = %19
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef %10, i32 noundef 1, i32 noundef 2)
          to label %21 unwind label %32

21:                                               ; preds = %20
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef %10, i32 noundef 1, i32 noundef 3)
          to label %22 unwind label %32

22:                                               ; preds = %21
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef %10, i32 noundef 1, i32 noundef 4)
          to label %23 unwind label %32

23:                                               ; preds = %22
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef %10, i32 noundef 2, i32 noundef 3)
          to label %24 unwind label %32

24:                                               ; preds = %23
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef %10, i32 noundef 3, i32 noundef 4)
          to label %25 unwind label %32

25:                                               ; preds = %24
  %26 = load i32, ptr %2, align 4, !tbaa !5
  invoke void @_Z3DFSPSt6vectorIiSaIiEEi(ptr noundef %10, i32 noundef %26)
          to label %27 unwind label %32

27:                                               ; preds = %25
  %28 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.1)
          to label %29 unwind label %32

29:                                               ; preds = %27
  store i32 0, ptr %1, align 4
  %30 = getelementptr inbounds %"class.std::vector", ptr %10, i64 %8
  %31 = icmp eq ptr %10, %30
  br i1 %31, label %42, label %38

32:                                               ; preds = %27, %25, %24, %23, %22, %21, %20, %19, %18
  %33 = landingpad { ptr, i32 }
          cleanup
  %34 = extractvalue { ptr, i32 } %33, 0
  store ptr %34, ptr %5, align 8
  %35 = extractvalue { ptr, i32 } %33, 1
  store i32 %35, ptr %6, align 4
  %36 = getelementptr inbounds %"class.std::vector", ptr %10, i64 %8
  %37 = icmp eq ptr %10, %36
  br i1 %37, label %49, label %45

38:                                               ; preds = %38, %29
  %39 = phi ptr [ %30, %29 ], [ %40, %38 ]
  %40 = getelementptr inbounds %"class.std::vector", ptr %39, i64 -1
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %40) #6
  %41 = icmp eq ptr %40, %10
  br i1 %41, label %42, label %38

42:                                               ; preds = %38, %29
  %43 = load ptr, ptr %3, align 8
  call void @llvm.stackrestore.p0(ptr %43)
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #6
  %44 = load i32, ptr %1, align 4
  ret i32 %44

45:                                               ; preds = %45, %32
  %46 = phi ptr [ %36, %32 ], [ %47, %45 ]
  %47 = getelementptr inbounds %"class.std::vector", ptr %46, i64 -1
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %47) #6
  %48 = icmp eq ptr %47, %10
  br i1 %48, label %49, label %45

49:                                               ; preds = %45, %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #6
  br label %50

50:                                               ; preds = %49
  %51 = load ptr, ptr %5, align 8
  %52 = load i32, ptr %6, align 4
  %53 = insertvalue { ptr, i32 } poison, ptr %51, 0
  %54 = insertvalue { ptr, i32 } %53, i32 %52, 1
  resume { ptr, i32 } %54
}

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #5 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #4

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 = { 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 #3 = { 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 #4 = { nocallback nofree nosync nounwind willreturn }
attributes #5 = { 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 #6 = { 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"}


; 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_ostream" = type { ptr, %"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::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 }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z3DFSPSt6vectorIiSaIiEEi(ptr noundef, i32 noundef) local_unnamed_addr #0

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 personality ptr @__gxx_personality_v0 {
  %1 = alloca [5 x %"class.std::vector"], align 16
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %1) #4
  %.ptr.1 = getelementptr inbounds i8, ptr %1, i64 24
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %.ptr.1) #4
  %.ptr.2 = getelementptr inbounds i8, ptr %1, i64 48
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %.ptr.2) #4
  %.ptr.3 = getelementptr inbounds i8, ptr %1, i64 72
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %.ptr.3) #4
  %.ptr.4 = getelementptr inbounds i8, ptr %1, i64 96
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %.ptr.4) #4
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef nonnull %1, i32 noundef 0, i32 noundef 1)
          to label %2 unwind label %16

2:                                                ; preds = %0
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef nonnull %1, i32 noundef 0, i32 noundef 4)
          to label %3 unwind label %16

3:                                                ; preds = %2
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef nonnull %1, i32 noundef 1, i32 noundef 2)
          to label %4 unwind label %16

4:                                                ; preds = %3
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef nonnull %1, i32 noundef 1, i32 noundef 3)
          to label %5 unwind label %16

5:                                                ; preds = %4
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef nonnull %1, i32 noundef 1, i32 noundef 4)
          to label %6 unwind label %16

6:                                                ; preds = %5
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef nonnull %1, i32 noundef 2, i32 noundef 3)
          to label %7 unwind label %16

7:                                                ; preds = %6
  invoke void @_Z7addEdgePSt6vectorIiSaIiEEii(ptr noundef nonnull %1, i32 noundef 3, i32 noundef 4)
          to label %8 unwind label %16

8:                                                ; preds = %7
  invoke void @_Z3DFSPSt6vectorIiSaIiEEi(ptr noundef nonnull %1, i32 noundef 5)
          to label %9 unwind label %16

9:                                                ; preds = %8
  %10 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str.1)
          to label %11 unwind label %16

11:                                               ; preds = %9
  %12 = getelementptr inbounds i8, ptr %1, i64 96
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %12) #4
  %13 = getelementptr inbounds i8, ptr %1, i64 72
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %13) #4
  %14 = getelementptr inbounds i8, ptr %1, i64 48
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %14) #4
  %15 = getelementptr inbounds i8, ptr %1, i64 24
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %15) #4
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %1) #4
  ret i32 0

16:                                               ; preds = %9, %8, %7, %6, %5, %4, %3, %2, %0
  %17 = landingpad { ptr, i32 }
          cleanup
  %18 = getelementptr inbounds i8, ptr %1, i64 96
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %18) #4
  %19 = getelementptr inbounds i8, ptr %1, i64 72
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %19) #4
  %20 = getelementptr inbounds i8, ptr %1, i64 48
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %20) #4
  %21 = getelementptr inbounds i8, ptr %1, i64 24
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %21) #4
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %1) #4
  resume { ptr, i32 } %17
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) 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 = { 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 #2 = { 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 #3 = { 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)"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass