; LLVM IR from DionysiosB/CodeForces :: 1843D-AppleTree.ll (Z3dfsxxRKSt6vectorIS_IxSaIxEESaIS1_EERS1_)

; 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 }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsxxRKSt6vectorIS_IxSaIxEESaIS1_EERS1_(i64 noundef %0, i64 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(24) %3) #0 personality ptr @__gxx_personality_v0 {
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca %"class.std::vector", align 8
  %10 = alloca i32, align 4
  %11 = alloca i64, align 8
  %12 = alloca i64, align 8
  %13 = alloca ptr, align 8
  %14 = alloca i32, align 4
  store i64 %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 24, ptr %9) #3
  %15 = load ptr, ptr %7, align 8, !tbaa !9
  %16 = load i64, ptr %5, align 8, !tbaa !5
  %17 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IxSaIxEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %15, i64 noundef %16) #3
  call void @_ZNSt6vectorIxSaIxEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24) %9, ptr noundef nonnull align 8 dereferenceable(24) %17)
  %18 = load i64, ptr %5, align 8, !tbaa !5
  %19 = icmp sgt i64 %18, 1
  br i1 %19, label %20, label %27

20:                                               ; preds = %4
  %21 = call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %9) #3
  %22 = icmp eq i64 %21, 1
  br i1 %22, label %23, label %27

23:                                               ; preds = %20
  %24 = load ptr, ptr %8, align 8, !tbaa !9
  %25 = load i64, ptr %5, align 8, !tbaa !5
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %24, i64 noundef %25) #3
  store i64 1, ptr %26, align 8, !tbaa !5
  store i32 1, ptr %10, align 4
  br label %67

27:                                               ; preds = %20, %4
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  store i64 0, ptr %11, align 8, !tbaa !5
  br label %28

28:                                               ; preds = %59, %27
  %29 = load i64, ptr %11, align 8, !tbaa !5
  %30 = call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %9) #3
  %31 = icmp ult i64 %29, %30
  br i1 %31, label %33, label %32

32:                                               ; preds = %28
  store i32 2, ptr %10, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  br label %66

33:                                               ; preds = %28
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #3
  %34 = load i64, ptr %11, align 8, !tbaa !5
  %35 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %9, i64 noundef %34) #3
  %36 = load i64, ptr %35, align 8, !tbaa !5
  store i64 %36, ptr %12, align 8, !tbaa !5
  %37 = load i64, ptr %12, align 8, !tbaa !5
  %38 = load i64, ptr %6, align 8, !tbaa !5
  %39 = icmp eq i64 %37, %38
  br i1 %39, label %40, label %41

40:                                               ; preds = %33
  store i32 4, ptr %10, align 4
  br label %56

41:                                               ; preds = %33
  %42 = load i64, ptr %12, align 8, !tbaa !5
  %43 = load i64, ptr %5, align 8, !tbaa !5
  %44 = load ptr, ptr %7, align 8, !tbaa !9
  %45 = load ptr, ptr %8, align 8, !tbaa !9
  invoke void @_Z3dfsxxRKSt6vectorIS_IxSaIxEESaIS1_EERS1_(i64 noundef %42, i64 noundef %43, ptr noundef nonnull align 8 dereferenceable(24) %44, ptr noundef nonnull align 8 dereferenceable(24) %45)
          to label %46 unwind label %62

46:                                               ; preds = %41
  %47 = load ptr, ptr %8, align 8, !tbaa !9
  %48 = load i64, ptr %12, align 8, !tbaa !5
  %49 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %47, i64 noundef %48) #3
  %50 = load i64, ptr %49, align 8, !tbaa !5
  %51 = load ptr, ptr %8, align 8, !tbaa !9
  %52 = load i64, ptr %5, align 8, !tbaa !5
  %53 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %51, i64 noundef %52) #3
  %54 = load i64, ptr %53, align 8, !tbaa !5
  %55 = add nsw i64 %54, %50
  store i64 %55, ptr %53, align 8, !tbaa !5
  store i32 0, ptr %10, align 4
  br label %56

56:                                               ; preds = %46, %40
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #3
  %57 = load i32, ptr %10, align 4
  switch i32 %57, label %73 [
    i32 0, label %58
    i32 4, label %59
  ]

58:                                               ; preds = %56
  br label %59

59:                                               ; preds = %58, %56
  %60 = load i64, ptr %11, align 8, !tbaa !5
  %61 = add nsw i64 %60, 1
  store i64 %61, ptr %11, align 8, !tbaa !5
  br label %28, !llvm.loop !11

62:                                               ; preds = %41
  %63 = landingpad { ptr, i32 }
          cleanup
  %64 = extractvalue { ptr, i32 } %63, 0
  store ptr %64, ptr %13, align 8
  %65 = extractvalue { ptr, i32 } %63, 1
  store i32 %65, ptr %14, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %9) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %9) #3
  br label %68

66:                                               ; preds = %32
  store i32 1, ptr %10, align 4
  br label %67

67:                                               ; preds = %66, %23
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %9) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %9) #3
  ret void

68:                                               ; preds = %62
  %69 = load ptr, ptr %13, align 8
  %70 = load i32, ptr %14, align 4
  %71 = insertvalue { ptr, i32 } poison, ptr %69, 0
  %72 = insertvalue { ptr, i32 } %71, i32 %70, 1
  resume { ptr, i32 } %72

73:                                               ; preds = %56
  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 noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IxSaIxEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

declare i32 @__gxx_personality_v0(...)

; 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 void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #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 = { 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}
!11 = distinct !{!11, !12}
!12 = !{!"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" = 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 }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsxxRKSt6vectorIS_IxSaIxEESaIS1_EERS1_(i64 noundef %0, i64 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(24) %3) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %5 = alloca %"class.std::vector", align 8
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %5) #3
  %6 = tail call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IxSaIxEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %0) #3
  call void @_ZNSt6vectorIxSaIxEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24) %5, ptr noundef nonnull align 8 dereferenceable(24) %6)
  %7 = icmp sgt i64 %0, 1
  br i1 %7, label %8, label %13

8:                                                ; preds = %4
  %9 = call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  %10 = icmp eq i64 %9, 1
  br i1 %10, label %11, label %13

11:                                               ; preds = %8
  %12 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %0) #3
  store i64 1, ptr %12, align 8, !tbaa !5
  br label %.loopexit

13:                                               ; preds = %8, %4
  %14 = call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  %.not = icmp eq i64 %14, 0
  br i1 %.not, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %13, %25
  %.021 = phi i64 [ %26, %25 ], [ 0, %13 ]
  %15 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %5, i64 noundef %.021) #3
  %16 = load i64, ptr %15, align 8, !tbaa !5
  %17 = icmp eq i64 %16, %1
  br i1 %17, label %25, label %18

18:                                               ; preds = %.lr.ph
  invoke void @_Z3dfsxxRKSt6vectorIS_IxSaIxEESaIS1_EERS1_(i64 noundef %16, i64 noundef %0, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(24) %3)
          to label %19 unwind label %29

19:                                               ; preds = %18
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %16) #3
  %21 = load i64, ptr %20, align 8, !tbaa !5
  %22 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %0) #3
  %23 = load i64, ptr %22, align 8, !tbaa !5
  %24 = add nsw i64 %23, %21
  store i64 %24, ptr %22, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %.lr.ph, %19
  %26 = add nuw nsw i64 %.021, 1
  %27 = call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  %28 = icmp ult i64 %26, %27
  br i1 %28, label %.lr.ph, label %.loopexit, !llvm.loop !9

29:                                               ; preds = %18
  %30 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %5) #3
  resume { ptr, i32 } %30

.loopexit:                                        ; preds = %25, %13, %11
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %5) #3
  ret void
}

; 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 noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IxSaIxEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

declare i32 @__gxx_personality_v0(...)

; 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 void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #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 = { mustprogress 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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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