; LLVM IR from eyangch/competitive-programming :: Codeforces/1541/d.ll (Z3dfsxxx)

; 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 }

@up = external dso_local global [10 x [200 x i64]], align 16
@de = external dso_local global [200 x i64], align 16
@graph = external dso_local global [200 x %"class.std::vector"], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %10 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %11 = alloca i32, align 4
  %12 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  store i64 1, ptr %7, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %33, %3
  %14 = load i64, ptr %7, align 8, !tbaa !5
  %15 = icmp slt i64 %14, 10
  br i1 %15, label %17, label %16

16:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  br label %36

17:                                               ; preds = %13
  %18 = load i64, ptr %7, align 8, !tbaa !5
  %19 = sub nsw i64 %18, 1
  %20 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 %19
  %21 = load i64, ptr %7, align 8, !tbaa !5
  %22 = sub nsw i64 %21, 1
  %23 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 %22
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds [200 x i64], ptr %23, i64 0, i64 %24
  %26 = load i64, ptr %25, align 8, !tbaa !5
  %27 = getelementptr inbounds [200 x i64], ptr %20, i64 0, i64 %26
  %28 = load i64, ptr %27, align 8, !tbaa !5
  %29 = load i64, ptr %7, align 8, !tbaa !5
  %30 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 %29
  %31 = load i64, ptr %4, align 8, !tbaa !5
  %32 = getelementptr inbounds [200 x i64], ptr %30, i64 0, i64 %31
  store i64 %28, ptr %32, align 8, !tbaa !5
  br label %33

33:                                               ; preds = %17
  %34 = load i64, ptr %7, align 8, !tbaa !5
  %35 = add nsw i64 %34, 1
  store i64 %35, ptr %7, align 8, !tbaa !5
  br label %13, !llvm.loop !9

36:                                               ; preds = %16
  %37 = load i64, ptr %6, align 8, !tbaa !5
  %38 = load i64, ptr %4, align 8, !tbaa !5
  %39 = getelementptr inbounds [200 x i64], ptr @de, i64 0, i64 %38
  store i64 %37, ptr %39, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %40 = load i64, ptr %4, align 8, !tbaa !5
  %41 = getelementptr inbounds [200 x %"class.std::vector"], ptr @graph, i64 0, i64 %40
  store ptr %41, ptr %8, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #4
  %42 = load ptr, ptr %8, align 8, !tbaa !11
  %43 = call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %42) #4
  %44 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %9, i32 0, i32 0
  store ptr %43, ptr %44, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %45 = load ptr, ptr %8, align 8, !tbaa !11
  %46 = call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %45) #4
  %47 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  store ptr %46, ptr %47, align 8
  br label %48

48:                                               ; preds = %69, %36
  %49 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %9, ptr noundef nonnull align 8 dereferenceable(8) %10) #4
  br i1 %49, label %51, label %50

50:                                               ; preds = %48
  store i32 5, ptr %11, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  br label %71

51:                                               ; preds = %48
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #4
  %52 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %9) #4
  %53 = load i64, ptr %52, align 8, !tbaa !5
  store i64 %53, ptr %12, align 8, !tbaa !5
  %54 = load i64, ptr %12, align 8, !tbaa !5
  %55 = load i64, ptr %5, align 8, !tbaa !5
  %56 = icmp eq i64 %54, %55
  br i1 %56, label %57, label %58

57:                                               ; preds = %51
  store i32 6, ptr %11, align 4
  br label %66

58:                                               ; preds = %51
  %59 = load i64, ptr %4, align 8, !tbaa !5
  %60 = load i64, ptr %12, align 8, !tbaa !5
  %61 = getelementptr inbounds [200 x i64], ptr @up, i64 0, i64 %60
  store i64 %59, ptr %61, align 8, !tbaa !5
  %62 = load i64, ptr %12, align 8, !tbaa !5
  %63 = load i64, ptr %4, align 8, !tbaa !5
  %64 = load i64, ptr %6, align 8, !tbaa !5
  %65 = add nsw i64 %64, 1
  call void @_Z3dfsxxx(i64 noundef %62, i64 noundef %63, i64 noundef %65)
  store i32 0, ptr %11, align 4
  br label %66

66:                                               ; preds = %58, %57
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #4
  %67 = load i32, ptr %11, align 4
  switch i32 %67, label %72 [
    i32 0, label %68
    i32 6, label %69
  ]

68:                                               ; preds = %66
  br label %69

69:                                               ; preds = %68, %66
  %70 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %9) #4
  br label %48

71:                                               ; preds = %50
  ret void

72:                                               ; preds = %66
  unreachable
}

; 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: 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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !12, i64 0}
!12 = !{!"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 }

@up = external dso_local local_unnamed_addr global [10 x [200 x i64]], align 16
@de = external dso_local local_unnamed_addr global [200 x i64], align 16
@graph = external dso_local global [200 x %"class.std::vector"], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z3dfsxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %5 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %6 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 0, i64 %0
  %7 = load i64, ptr %6, align 8, !tbaa !5
  %8 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 0, i64 %7
  %9 = load i64, ptr %8, align 8, !tbaa !5
  %10 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 1, i64 %0
  store i64 %9, ptr %10, align 8, !tbaa !5
  %11 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 1, i64 %9
  %12 = load i64, ptr %11, align 8, !tbaa !5
  %13 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 2, i64 %0
  store i64 %12, ptr %13, align 8, !tbaa !5
  %14 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 2, i64 %12
  %15 = load i64, ptr %14, align 8, !tbaa !5
  %16 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 3, i64 %0
  store i64 %15, ptr %16, align 8, !tbaa !5
  %17 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 3, i64 %15
  %18 = load i64, ptr %17, align 8, !tbaa !5
  %19 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 4, i64 %0
  store i64 %18, ptr %19, align 8, !tbaa !5
  %20 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 4, i64 %18
  %21 = load i64, ptr %20, align 8, !tbaa !5
  %22 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 5, i64 %0
  store i64 %21, ptr %22, align 8, !tbaa !5
  %23 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 5, i64 %21
  %24 = load i64, ptr %23, align 8, !tbaa !5
  %25 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 6, i64 %0
  store i64 %24, ptr %25, align 8, !tbaa !5
  %26 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 6, i64 %24
  %27 = load i64, ptr %26, align 8, !tbaa !5
  %28 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 7, i64 %0
  store i64 %27, ptr %28, align 8, !tbaa !5
  %29 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 7, i64 %27
  %30 = load i64, ptr %29, align 8, !tbaa !5
  %31 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 8, i64 %0
  store i64 %30, ptr %31, align 8, !tbaa !5
  %32 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 8, i64 %30
  %33 = load i64, ptr %32, align 8, !tbaa !5
  %34 = getelementptr inbounds [10 x [200 x i64]], ptr @up, i64 0, i64 9, i64 %0
  store i64 %33, ptr %34, align 8, !tbaa !5
  %35 = getelementptr inbounds [200 x i64], ptr @de, i64 0, i64 %0
  store i64 %2, ptr %35, align 8, !tbaa !5
  %36 = getelementptr inbounds [200 x %"class.std::vector"], ptr @graph, i64 0, i64 %0
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %37 = tail call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %36) #3
  store ptr %37, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  %38 = tail call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %36) #3
  store ptr %38, ptr %5, align 8
  %39 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5) #3
  br i1 %39, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3
  %40 = add nsw i64 %2, 1
  br label %41

._crit_edge:                                      ; preds = %47, %3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  ret void

41:                                               ; preds = %.lr.ph, %47
  %42 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  %43 = load i64, ptr %42, align 8, !tbaa !5
  %44 = icmp eq i64 %43, %1
  br i1 %44, label %47, label %45

45:                                               ; preds = %41
  %46 = getelementptr inbounds [200 x i64], ptr @up, i64 0, i64 %43
  store i64 %0, ptr %46, align 8, !tbaa !5
  call void @_Z3dfsxxx(i64 noundef %43, i64 noundef %0, i64 noundef %40)
  br label %47

47:                                               ; preds = %41, %45
  %48 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  %49 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5) #3
  br i1 %49, label %41, label %._crit_edge
}

; 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 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 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 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,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass