; LLVM IR from DionysiosB/CodeForces :: 0700-0799/780E-UndergroundLab.ll (Z3dfsllRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERS1_)

; 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"

%"struct.std::_Bit_reference" = type { ptr, i64 }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsllRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERS1_(i64 noundef %0, i64 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(40) %3, ptr noundef nonnull align 8 dereferenceable(24) %4) #0 {
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca %"struct.std::_Bit_reference", align 8
  %12 = alloca %"struct.std::_Bit_reference", align 8
  %13 = alloca i64, align 8
  %14 = alloca i32, align 4
  %15 = alloca i64, align 8
  %16 = alloca %"struct.std::_Bit_reference", align 8
  store i64 %0, ptr %6, align 8, !tbaa !5
  store i64 %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !9
  store ptr %4, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 16, ptr %11) #3
  %17 = load ptr, ptr %9, align 8, !tbaa !9
  %18 = load i64, ptr %6, align 8, !tbaa !5
  %19 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %17, i64 noundef %18)
  %20 = getelementptr inbounds { ptr, i64 }, ptr %11, i32 0, i32 0
  %21 = extractvalue { ptr, i64 } %19, 0
  store ptr %21, ptr %20, align 8
  %22 = getelementptr inbounds { ptr, i64 }, ptr %11, i32 0, i32 1
  %23 = extractvalue { ptr, i64 } %19, 1
  store i64 %23, ptr %22, align 8
  %24 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %11) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %11) #3
  br i1 %24, label %25, label %26

25:                                               ; preds = %5
  br label %74

26:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 16, ptr %12) #3
  %27 = load ptr, ptr %9, align 8, !tbaa !9
  %28 = load i64, ptr %6, align 8, !tbaa !5
  %29 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %27, i64 noundef %28)
  %30 = getelementptr inbounds { ptr, i64 }, ptr %12, i32 0, i32 0
  %31 = extractvalue { ptr, i64 } %29, 0
  store ptr %31, ptr %30, align 8
  %32 = getelementptr inbounds { ptr, i64 }, ptr %12, i32 0, i32 1
  %33 = extractvalue { ptr, i64 } %29, 1
  store i64 %33, ptr %32, align 8
  %34 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt14_Bit_referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16) %12, i1 noundef zeroext true) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %12) #3
  %35 = load ptr, ptr %10, align 8, !tbaa !9
  call void @_ZNSt6vectorIlSaIlEE9push_backERKl(ptr noundef nonnull align 8 dereferenceable(24) %35, ptr noundef nonnull align 8 dereferenceable(8) %6)
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #3
  store i64 0, ptr %13, align 8, !tbaa !5
  br label %36

36:                                               ; preds = %69, %26
  %37 = load i64, ptr %13, align 8, !tbaa !5
  %38 = load ptr, ptr %8, align 8, !tbaa !9
  %39 = load i64, ptr %6, align 8, !tbaa !5
  %40 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %38, i64 noundef %39) #3
  %41 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %40) #3
  %42 = icmp ult i64 %37, %41
  br i1 %42, label %44, label %43

43:                                               ; preds = %36
  store i32 2, ptr %14, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #3
  br label %72

44:                                               ; preds = %36
  call void @llvm.lifetime.start.p0(i64 8, ptr %15) #3
  %45 = load ptr, ptr %8, align 8, !tbaa !9
  %46 = load i64, ptr %6, align 8, !tbaa !5
  %47 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %45, i64 noundef %46) #3
  %48 = load i64, ptr %13, align 8, !tbaa !5
  %49 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %47, i64 noundef %48) #3
  %50 = load i64, ptr %49, align 8, !tbaa !5
  store i64 %50, ptr %15, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %16) #3
  %51 = load ptr, ptr %9, align 8, !tbaa !9
  %52 = load i64, ptr %15, align 8, !tbaa !5
  %53 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %51, i64 noundef %52)
  %54 = getelementptr inbounds { ptr, i64 }, ptr %16, i32 0, i32 0
  %55 = extractvalue { ptr, i64 } %53, 0
  store ptr %55, ptr %54, align 8
  %56 = getelementptr inbounds { ptr, i64 }, ptr %16, i32 0, i32 1
  %57 = extractvalue { ptr, i64 } %53, 1
  store i64 %57, ptr %56, align 8
  %58 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %16) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %16) #3
  br i1 %58, label %59, label %60

59:                                               ; preds = %44
  store i32 4, ptr %14, align 4
  br label %66

60:                                               ; preds = %44
  %61 = load i64, ptr %15, align 8, !tbaa !5
  %62 = load i64, ptr %6, align 8, !tbaa !5
  %63 = load ptr, ptr %8, align 8, !tbaa !9
  %64 = load ptr, ptr %9, align 8, !tbaa !9
  %65 = load ptr, ptr %10, align 8, !tbaa !9
  call void @_Z3dfsllRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERS1_(i64 noundef %61, i64 noundef %62, ptr noundef nonnull align 8 dereferenceable(24) %63, ptr noundef nonnull align 8 dereferenceable(40) %64, ptr noundef nonnull align 8 dereferenceable(24) %65)
  store i32 0, ptr %14, align 4
  br label %66

66:                                               ; preds = %60, %59
  call void @llvm.lifetime.end.p0(i64 8, ptr %15) #3
  %67 = load i32, ptr %14, align 4
  switch i32 %67, label %75 [
    i32 0, label %68
    i32 4, label %69
  ]

68:                                               ; preds = %66
  br label %69

69:                                               ; preds = %68, %66
  %70 = load i64, ptr %13, align 8, !tbaa !5
  %71 = add nsw i64 %70, 1
  store i64 %71, ptr %13, align 8, !tbaa !5
  br label %36, !llvm.loop !11

72:                                               ; preds = %43
  %73 = load ptr, ptr %10, align 8, !tbaa !9
  call void @_ZNSt6vectorIlSaIlEE9push_backERKl(ptr noundef nonnull align 8 dereferenceable(24) %73, ptr noundef nonnull align 8 dereferenceable(8) %7)
  br label %74

74:                                               ; preds = %72, %25
  ret void

75:                                               ; 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: mustprogress uwtable
declare dso_local { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16)) #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(16) ptr @_ZNSt14_Bit_referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16), i1 noundef zeroext) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIlSaIlEE9push_backERKl(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(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 @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #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", !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"

%"struct.std::_Bit_reference" = type { ptr, i64 }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsllRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERS1_(i64 noundef %0, i64 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(40) %3, ptr noundef nonnull align 8 dereferenceable(24) %4) local_unnamed_addr #0 {
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca %"struct.std::_Bit_reference", align 8
  %9 = alloca %"struct.std::_Bit_reference", align 8
  %10 = alloca %"struct.std::_Bit_reference", align 8
  store i64 %0, ptr %6, align 8, !tbaa !5
  store i64 %1, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %8) #3
  %11 = tail call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %3, i64 noundef %0)
  %12 = extractvalue { ptr, i64 } %11, 0
  store ptr %12, ptr %8, align 8
  %13 = getelementptr inbounds i8, ptr %8, i64 8
  %14 = extractvalue { ptr, i64 } %11, 1
  store i64 %14, ptr %13, align 8
  %15 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %8) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %8) #3
  br i1 %15, label %43, label %16

16:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %9) #3
  %17 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %3, i64 noundef %0)
  %18 = extractvalue { ptr, i64 } %17, 0
  store ptr %18, ptr %9, align 8
  %19 = getelementptr inbounds i8, ptr %9, i64 8
  %20 = extractvalue { ptr, i64 } %17, 1
  store i64 %20, ptr %19, align 8
  %21 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt14_Bit_referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16) %9, i1 noundef zeroext true) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %9) #3
  call void @_ZNSt6vectorIlSaIlEE9push_backERKl(ptr noundef nonnull align 8 dereferenceable(24) %4, ptr noundef nonnull align 8 dereferenceable(8) %6)
  %22 = load i64, ptr %6, align 8, !tbaa !5
  %23 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %22) #3
  %24 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %23) #3
  %.not = icmp eq i64 %24, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %16
  %25 = getelementptr inbounds i8, ptr %10, i64 8
  br label %26

._crit_edge:                                      ; preds = %37, %16
  call void @_ZNSt6vectorIlSaIlEE9push_backERKl(ptr noundef nonnull align 8 dereferenceable(24) %4, ptr noundef nonnull align 8 dereferenceable(8) %7)
  br label %43

26:                                               ; preds = %.lr.ph, %37
  %.014 = phi i64 [ 0, %.lr.ph ], [ %38, %37 ]
  %27 = load i64, ptr %6, align 8, !tbaa !5
  %28 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %27) #3
  %29 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %28, i64 noundef %.014) #3
  %30 = load i64, ptr %29, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %10) #3
  %31 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %3, i64 noundef %30)
  %32 = extractvalue { ptr, i64 } %31, 0
  store ptr %32, ptr %10, align 8
  %33 = extractvalue { ptr, i64 } %31, 1
  store i64 %33, ptr %25, align 8
  %34 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %10) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %10) #3
  br i1 %34, label %37, label %35

35:                                               ; preds = %26
  %36 = load i64, ptr %6, align 8, !tbaa !5
  call void @_Z3dfsllRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERS1_(i64 noundef %30, i64 noundef %36, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(40) %3, ptr noundef nonnull align 8 dereferenceable(24) %4)
  br label %37

37:                                               ; preds = %26, %35
  %38 = add nuw nsw i64 %.014, 1
  %39 = load i64, ptr %6, align 8, !tbaa !5
  %40 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %39) #3
  %41 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %40) #3
  %42 = icmp ult i64 %38, %41
  br i1 %42, label %26, label %._crit_edge, !llvm.loop !9

43:                                               ; preds = %5, %._crit_edge
  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 uwtable
declare dso_local { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #2 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(16) ptr @_ZNSt14_Bit_referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16), i1 noundef zeroext) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIlSaIlEE9push_backERKl(ptr noundef nonnull align 8 dereferenceable(24), 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(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(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 @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_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", !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,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass