; LLVM IR from pranjalwalia/Competitive-programming :: HackerEarth/Graphs/bishu_and_girlfrineds.ll (Z3dfsxx)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@vis = external dso_local global [100005 x i8], align 16
@flag = external dso_local global [100005 x i8], align 16
@d_min = external dso_local global i64, align 8
@node_min = external dso_local global i64, align 8
@g = external dso_local global [100005 x %"class.std::vector"], align 16

; 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 @_Z3dfsxx(i64 noundef %0, i64 noundef %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %7 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %8 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds [100005 x i8], ptr @vis, i64 0, i64 %9
  store i8 1, ptr %10, align 1, !tbaa !9
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds [100005 x i8], ptr @flag, i64 0, i64 %11
  %13 = load i8, ptr %12, align 1, !tbaa !9, !range !11, !noundef !12
  %14 = trunc i8 %13 to i1
  %15 = zext i1 %14 to i32
  %16 = icmp eq i32 %15, 1
  br i1 %16, label %17, label %36

17:                                               ; preds = %2
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = load i64, ptr @d_min, align 8, !tbaa !5
  %20 = icmp slt i64 %18, %19
  br i1 %20, label %21, label %24

21:                                               ; preds = %17
  %22 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %22, ptr @d_min, align 8, !tbaa !5
  %23 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %23, ptr @node_min, align 8, !tbaa !5
  br label %24

24:                                               ; preds = %21, %17
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = load i64, ptr @d_min, align 8, !tbaa !5
  %27 = icmp eq i64 %25, %26
  br i1 %27, label %28, label %35

28:                                               ; preds = %24
  %29 = load i64, ptr %3, align 8, !tbaa !5
  %30 = load i64, ptr @node_min, align 8, !tbaa !5
  %31 = icmp slt i64 %29, %30
  br i1 %31, label %32, label %34

32:                                               ; preds = %28
  %33 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %33, ptr @node_min, align 8, !tbaa !5
  br label %34

34:                                               ; preds = %32, %28
  br label %35

35:                                               ; preds = %34, %24
  br label %36

36:                                               ; preds = %35, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %37 = load i64, ptr %3, align 8, !tbaa !5
  %38 = getelementptr inbounds [100005 x %"class.std::vector"], ptr @g, i64 0, i64 %37
  store ptr %38, ptr %5, align 8, !tbaa !13
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %39 = load ptr, ptr %5, align 8, !tbaa !13
  %40 = call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %39) #4
  %41 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  store ptr %40, ptr %41, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %42 = load ptr, ptr %5, align 8, !tbaa !13
  %43 = call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %42) #4
  %44 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %7, i32 0, i32 0
  store ptr %43, ptr %44, align 8
  br label %45

45:                                               ; preds = %60, %36
  %46 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %7) #4
  br i1 %46, label %48, label %47

47:                                               ; preds = %45
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %62

48:                                               ; preds = %45
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %49 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  %50 = load i64, ptr %49, align 8, !tbaa !5
  store i64 %50, ptr %8, align 8, !tbaa !5
  %51 = load i64, ptr %8, align 8, !tbaa !5
  %52 = getelementptr inbounds [100005 x i8], ptr @vis, i64 0, i64 %51
  %53 = load i8, ptr %52, align 1, !tbaa !9, !range !11, !noundef !12
  %54 = trunc i8 %53 to i1
  br i1 %54, label %59, label %55

55:                                               ; preds = %48
  %56 = load i64, ptr %8, align 8, !tbaa !5
  %57 = load i64, ptr %4, align 8, !tbaa !5
  %58 = add nsw i64 %57, 1
  call void @_Z3dfsxx(i64 noundef %56, i64 noundef %58)
  br label %59

59:                                               ; preds = %55, %48
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  br label %60

60:                                               ; preds = %59
  %61 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  br label %45

62:                                               ; preds = %47
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_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 noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = !{!14, !14, i64 0}
!14 = !{!"any pointer", !7, 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::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@vis = external dso_local local_unnamed_addr global [100005 x i8], align 16
@flag = external dso_local local_unnamed_addr global [100005 x i8], align 16
@d_min = external dso_local local_unnamed_addr global i64, align 8
@node_min = external dso_local local_unnamed_addr global i64, align 8
@g = external dso_local global [100005 x %"class.std::vector"], align 16

; 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 nounwind uwtable
define dso_local void @_Z3dfsxx(i64 noundef %0, i64 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 = getelementptr inbounds [100005 x i8], ptr @vis, i64 0, i64 %0
  store i8 1, ptr %5, align 1, !tbaa !5
  %6 = getelementptr inbounds [100005 x i8], ptr @flag, i64 0, i64 %0
  %7 = load i8, ptr %6, align 1, !tbaa !5, !range !9, !noundef !10
  %8 = trunc nuw i8 %7 to i1
  br i1 %8, label %9, label %15

9:                                                ; preds = %2
  %10 = load i64, ptr @d_min, align 8, !tbaa !11
  %11 = icmp sgt i64 %10, %1
  br i1 %11, label %.thread, label %12

.thread:                                          ; preds = %9
  store i64 %1, ptr @d_min, align 8, !tbaa !11
  br label %.sink.split

12:                                               ; preds = %9
  %.pre = load i64, ptr @node_min, align 8
  %13 = icmp eq i64 %10, %1
  %14 = icmp sgt i64 %.pre, %0
  %or.cond = select i1 %13, i1 %14, i1 false
  br i1 %or.cond, label %.sink.split, label %15

.sink.split:                                      ; preds = %12, %.thread
  store i64 %0, ptr @node_min, align 8, !tbaa !11
  br label %15

15:                                               ; preds = %.sink.split, %12, %2
  %16 = getelementptr inbounds [100005 x %"class.std::vector"], ptr @g, i64 0, i64 %0
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %17 = tail call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %16) #3
  store ptr %17, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %18 = tail call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %16) #3
  store ptr %18, ptr %4, align 8
  %19 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %19, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %15
  %20 = add nsw i64 %1, 1
  br label %21

._crit_edge:                                      ; preds = %28, %15
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  ret void

21:                                               ; preds = %.lr.ph, %28
  %22 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %23 = load i64, ptr %22, align 8, !tbaa !11
  %24 = getelementptr inbounds [100005 x i8], ptr @vis, i64 0, i64 %23
  %25 = load i8, ptr %24, align 1, !tbaa !5, !range !9, !noundef !10
  %26 = trunc nuw i8 %25 to i1
  br i1 %26, label %28, label %27

27:                                               ; preds = %21
  call void @_Z3dfsxx(i64 noundef %23, i64 noundef %20)
  br label %28

28:                                               ; preds = %27, %21
  %29 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %30 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %30, label %21, label %._crit_edge
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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 = !{i8 0, i8 2}
!10 = !{}
!11 = !{!12, !12, i64 0}
!12 = !{!"long long", !7, i64 0}


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