; LLVM IR from eyangch/competitive-programming :: Codeforces/618/d.ll (Z3dfsx)

; 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 }

@par = external dso_local global [200000 x i64], align 16
@ans = external dso_local global [200000 x i64], align 16
@graph = external dso_local global [200000 x %"class.std::vector"], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z3dfsx(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %8 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %9 = alloca i32, align 4
  %10 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  store i64 0, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  store i64 0, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds [200000 x %"class.std::vector"], ptr @graph, i64 0, i64 %11
  store ptr %12, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %13 = load ptr, ptr %6, align 8, !tbaa !9
  %14 = call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %13) #4
  %15 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %7, i32 0, i32 0
  store ptr %14, ptr %15, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %16 = load ptr, ptr %6, align 8, !tbaa !9
  %17 = call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %16) #4
  %18 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %8, i32 0, i32 0
  store ptr %17, ptr %18, align 8
  br label %19

19:                                               ; preds = %51, %1
  %20 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8) #4
  br i1 %20, label %22, label %21

21:                                               ; preds = %19
  store i32 2, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br label %53

22:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %23 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #4
  %24 = load i64, ptr %23, align 8, !tbaa !5
  store i64 %24, ptr %10, align 8, !tbaa !5
  %25 = load i64, ptr %10, align 8, !tbaa !5
  %26 = load i64, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds [200000 x i64], ptr @par, i64 0, i64 %26
  %28 = load i64, ptr %27, align 8, !tbaa !5
  %29 = icmp eq i64 %25, %28
  br i1 %29, label %30, label %31

30:                                               ; preds = %22
  store i32 3, ptr %9, align 4
  br label %48

31:                                               ; preds = %22
  %32 = load i64, ptr %3, align 8, !tbaa !5
  %33 = load i64, ptr %10, align 8, !tbaa !5
  %34 = getelementptr inbounds [200000 x i64], ptr @par, i64 0, i64 %33
  store i64 %32, ptr %34, align 8, !tbaa !5
  %35 = load i64, ptr %10, align 8, !tbaa !5
  %36 = call noundef i64 @_Z3dfsx(i64 noundef %35)
  %37 = load i64, ptr %5, align 8, !tbaa !5
  %38 = add nsw i64 %37, %36
  store i64 %38, ptr %5, align 8, !tbaa !5
  %39 = load i64, ptr %10, align 8, !tbaa !5
  %40 = getelementptr inbounds [200000 x i64], ptr @ans, i64 0, i64 %39
  %41 = load i64, ptr %40, align 8, !tbaa !5
  %42 = load i64, ptr %3, align 8, !tbaa !5
  %43 = getelementptr inbounds [200000 x i64], ptr @ans, i64 0, i64 %42
  %44 = load i64, ptr %43, align 8, !tbaa !5
  %45 = add nsw i64 %44, %41
  store i64 %45, ptr %43, align 8, !tbaa !5
  %46 = load i64, ptr %4, align 8, !tbaa !5
  %47 = add nsw i64 %46, 1
  store i64 %47, ptr %4, align 8, !tbaa !5
  store i32 0, ptr %9, align 4
  br label %48

48:                                               ; preds = %31, %30
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  %49 = load i32, ptr %9, align 4
  switch i32 %49, label %73 [
    i32 0, label %50
    i32 3, label %51
  ]

50:                                               ; preds = %48
  br label %51

51:                                               ; preds = %50, %48
  %52 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #4
  br label %19

53:                                               ; preds = %21
  %54 = load i64, ptr %4, align 8, !tbaa !5
  %55 = icmp eq i64 %54, 0
  br i1 %55, label %56, label %57

56:                                               ; preds = %53
  store i64 1, ptr %2, align 8
  store i32 1, ptr %9, align 4
  br label %71

57:                                               ; preds = %53
  %58 = load i64, ptr %5, align 8, !tbaa !5
  %59 = icmp sge i64 %58, 2
  br i1 %59, label %60, label %65

60:                                               ; preds = %57
  %61 = load i64, ptr %3, align 8, !tbaa !5
  %62 = getelementptr inbounds [200000 x i64], ptr @ans, i64 0, i64 %61
  %63 = load i64, ptr %62, align 8, !tbaa !5
  %64 = add nsw i64 %63, 2
  store i64 %64, ptr %62, align 8, !tbaa !5
  store i64 0, ptr %2, align 8
  store i32 1, ptr %9, align 4
  br label %71

65:                                               ; preds = %57
  %66 = load i64, ptr %5, align 8, !tbaa !5
  %67 = load i64, ptr %3, align 8, !tbaa !5
  %68 = getelementptr inbounds [200000 x i64], ptr @ans, i64 0, i64 %67
  %69 = load i64, ptr %68, align 8, !tbaa !5
  %70 = add nsw i64 %69, %66
  store i64 %70, ptr %68, align 8, !tbaa !5
  store i64 1, ptr %2, align 8
  store i32 1, ptr %9, align 4
  br label %71

71:                                               ; preds = %65, %60, %56
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  %72 = load i64, ptr %2, align 8
  ret i64 %72

73:                                               ; preds = %48
  unreachable
}

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

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

; 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 = { 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 = { 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 = !{!"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 }

@par = external dso_local local_unnamed_addr global [200000 x i64], align 16
@ans = external dso_local local_unnamed_addr global [200000 x i64], align 16
@graph = external dso_local global [200000 x %"class.std::vector"], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef range(i64 0, 2) i64 @_Z3dfsx(i64 noundef %0) local_unnamed_addr #0 {
  %2 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %3 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %4 = getelementptr inbounds [200000 x %"class.std::vector"], ptr @graph, i64 0, i64 %0
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %5 = tail call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  store ptr %5, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %6 = tail call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  store ptr %6, ptr %3, align 8
  %7 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  br i1 %7, label %.lr.ph, label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %1
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  br label %36

.lr.ph:                                           ; preds = %1
  %8 = getelementptr inbounds [200000 x i64], ptr @par, i64 0, i64 %0
  %9 = getelementptr inbounds [200000 x i64], ptr @ans, i64 0, i64 %0
  br label %11

._crit_edge:                                      ; preds = %25
  %10 = icmp eq i64 %.1, 0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  br i1 %10, label %36, label %28

11:                                               ; preds = %.lr.ph, %25
  %.01722 = phi i64 [ 0, %.lr.ph ], [ %.1, %25 ]
  %.01821 = phi i64 [ 0, %.lr.ph ], [ %.119, %25 ]
  %12 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %2) #3
  %13 = load i64, ptr %12, align 8, !tbaa !5
  %14 = load i64, ptr %8, align 8, !tbaa !5
  %15 = icmp eq i64 %13, %14
  br i1 %15, label %25, label %16

16:                                               ; preds = %11
  %17 = getelementptr inbounds [200000 x i64], ptr @par, i64 0, i64 %13
  store i64 %0, ptr %17, align 8, !tbaa !5
  %18 = call noundef i64 @_Z3dfsx(i64 noundef %13)
  %19 = add nsw i64 %18, %.01821
  %20 = getelementptr inbounds [200000 x i64], ptr @ans, i64 0, i64 %13
  %21 = load i64, ptr %20, align 8, !tbaa !5
  %22 = load i64, ptr %9, align 8, !tbaa !5
  %23 = add nsw i64 %22, %21
  store i64 %23, ptr %9, align 8, !tbaa !5
  %24 = add nsw i64 %.01722, 1
  br label %25

25:                                               ; preds = %11, %16
  %.119 = phi i64 [ %19, %16 ], [ %.01821, %11 ]
  %.1 = phi i64 [ %24, %16 ], [ %.01722, %11 ]
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %2) #3
  %27 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  br i1 %27, label %11, label %._crit_edge

28:                                               ; preds = %._crit_edge
  %29 = icmp sgt i64 %.119, 1
  %30 = getelementptr inbounds [200000 x i64], ptr @ans, i64 0, i64 %0
  %31 = load i64, ptr %30, align 8, !tbaa !5
  br i1 %29, label %32, label %34

32:                                               ; preds = %28
  %33 = add nsw i64 %31, 2
  store i64 %33, ptr %30, align 8, !tbaa !5
  br label %36

34:                                               ; preds = %28
  %35 = add nsw i64 %31, %.119
  store i64 %35, ptr %30, align 8, !tbaa !5
  br label %36

36:                                               ; preds = %._crit_edge.thread, %._crit_edge, %34, %32
  %.0 = phi i64 [ 0, %32 ], [ 1, %34 ], [ 1, %._crit_edge ], [ 1, %._crit_edge.thread ]
  ret i64 %.0
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 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 #0 align 2

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

; 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 #0 align 2

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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