; LLVM IR from lzyrapx/Competitive-Programming :: hihocoder/1041(树上dfs).ll (Z11Check_Reachii)

; 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::bitset" = type { %"struct.std::_Base_bitset" }
%"struct.std::_Base_bitset" = type { [2 x i64] }
%"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 }
%"class.std::bitset<110>::reference" = type { ptr, i64 }

@digit = external dso_local global [110 x %"class.std::bitset"], align 16
@road = external dso_local global [110 x %"class.std::vector"], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z11Check_Reachii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca %"class.std::bitset<110>::reference", align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %5) #3
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [110 x %"class.std::bitset"], ptr @digit, i64 0, i64 %10
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  call void @_ZNSt6bitsetILm110EEixEm(ptr dead_on_unwind writable sret(%"class.std::bitset<110>::reference") align 8 %5, ptr noundef nonnull align 8 dereferenceable(16) %11, i64 noundef %13)
  %14 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6bitsetILm110EE9referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16) %5, i1 noundef zeroext true) #3
  call void @_ZNSt6bitsetILm110EE9referenceD2Ev(ptr noundef nonnull align 8 dereferenceable(16) %5) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %15

15:                                               ; preds = %49, %2
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [110 x %"class.std::vector"], ptr @road, i64 0, i64 %19
  %21 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %20) #3
  %22 = icmp ult i64 %17, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %15
  store i32 2, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %52

24:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %25 = load i32, ptr %3, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [110 x %"class.std::vector"], ptr @road, i64 0, i64 %26
  %28 = load i32, ptr %6, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %27, i64 noundef %29) #3
  %31 = load i32, ptr %30, align 4, !tbaa !5
  store i32 %31, ptr %8, align 4, !tbaa !5
  %32 = load i32, ptr %8, align 4, !tbaa !5
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = icmp eq i32 %32, %33
  br i1 %34, label %35, label %36

35:                                               ; preds = %24
  store i32 4, ptr %7, align 4
  br label %46

36:                                               ; preds = %24
  %37 = load i32, ptr %8, align 4, !tbaa !5
  %38 = load i32, ptr %3, align 4, !tbaa !5
  call void @_Z11Check_Reachii(i32 noundef %37, i32 noundef %38)
  %39 = load i32, ptr %8, align 4, !tbaa !5
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [110 x %"class.std::bitset"], ptr @digit, i64 0, i64 %40
  %42 = load i32, ptr %3, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [110 x %"class.std::bitset"], ptr @digit, i64 0, i64 %43
  %45 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6bitsetILm110EEoRERKS0_(ptr noundef nonnull align 8 dereferenceable(16) %44, ptr noundef nonnull align 8 dereferenceable(16) %41) #3
  store i32 0, ptr %7, align 4
  br label %46

46:                                               ; preds = %36, %35
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  %47 = load i32, ptr %7, align 4
  switch i32 %47, label %53 [
    i32 0, label %48
    i32 4, label %49
  ]

48:                                               ; preds = %46
  br label %49

49:                                               ; preds = %48, %46
  %50 = load i32, ptr %6, align 4, !tbaa !5
  %51 = add nsw i32 %50, 1
  store i32 %51, ptr %6, align 4, !tbaa !5
  br label %15, !llvm.loop !9

52:                                               ; preds = %23
  ret void

53:                                               ; preds = %46
  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 void @_ZNSt6bitsetILm110EEixEm(ptr dead_on_unwind noalias writable sret(%"class.std::bitset<110>::reference") align 8, ptr noundef nonnull align 8 dereferenceable(16), i64 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6bitsetILm110EE9referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16), i1 noundef zeroext) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6bitsetILm110EE9referenceD2Ev(ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #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 i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(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(16) ptr @_ZNSt6bitsetILm110EEoRERKS0_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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::bitset" = type { %"struct.std::_Base_bitset" }
%"struct.std::_Base_bitset" = type { [2 x i64] }
%"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 }
%"class.std::bitset<110>::reference" = type { ptr, i64 }

@digit = external dso_local global [110 x %"class.std::bitset"], align 16
@road = external dso_local global [110 x %"class.std::vector"], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z11Check_Reachii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = alloca %"class.std::bitset<110>::reference", align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #2
  %4 = sext i32 %0 to i64
  %5 = getelementptr inbounds [110 x %"class.std::bitset"], ptr @digit, i64 0, i64 %4
  call void @_ZNSt6bitsetILm110EEixEm(ptr dead_on_unwind nonnull writable sret(%"class.std::bitset<110>::reference") align 8 %3, ptr noundef nonnull align 8 dereferenceable(16) %5, i64 noundef %4)
  %6 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6bitsetILm110EE9referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16) %3, i1 noundef zeroext true) #2
  call void @_ZNSt6bitsetILm110EE9referenceD2Ev(ptr noundef nonnull align 8 dereferenceable(16) %3) #2
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #2
  %7 = getelementptr inbounds [110 x %"class.std::vector"], ptr @road, i64 0, i64 %4
  %8 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %7) #2
  %.not = icmp eq i64 %8, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %16, %2
  ret void

.lr.ph:                                           ; preds = %2, %16
  %indvars.iv = phi i64 [ %indvars.iv.next, %16 ], [ 0, %2 ]
  %9 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %7, i64 noundef %indvars.iv) #2
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = icmp eq i32 %10, %1
  br i1 %11, label %16, label %12

12:                                               ; preds = %.lr.ph
  call void @_Z11Check_Reachii(i32 noundef %10, i32 noundef %0)
  %13 = sext i32 %10 to i64
  %14 = getelementptr inbounds [110 x %"class.std::bitset"], ptr @digit, i64 0, i64 %13
  %15 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6bitsetILm110EEoRERKS0_(ptr noundef nonnull align 8 dereferenceable(16) %5, ptr noundef nonnull align 8 dereferenceable(16) %14) #2
  br label %16

16:                                               ; preds = %.lr.ph, %12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %17 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %7) #2
  %18 = icmp ugt i64 %17, %indvars.iv.next
  br i1 %18, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

; 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 void @_ZNSt6bitsetILm110EEixEm(ptr dead_on_unwind noalias writable sret(%"class.std::bitset<110>::reference") align 8, ptr noundef nonnull align 8 dereferenceable(16), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6bitsetILm110EE9referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16), i1 noundef zeroext) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6bitsetILm110EE9referenceD2Ev(ptr noundef nonnull align 8 dereferenceable(16)) 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 i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6bitsetILm110EEoRERKS0_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) 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 = { 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"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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