; LLVM IR from DionysiosB/CodeForces :: 0900-0999/977E-CyclicComponents.ll (Z3dfslRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERb)

; 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 @_Z3dfslRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERb(i64 noundef %0, ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(40) %2, ptr noundef nonnull align 1 dereferenceable(1) %3) #0 {
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca %"struct.std::_Bit_reference", align 8
  %10 = alloca %"struct.std::_Bit_reference", align 8
  %11 = alloca i64, align 8
  %12 = alloca i32, align 4
  %13 = alloca i64, align 8
  %14 = alloca %"struct.std::_Bit_reference", align 8
  store i64 %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !9
  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 16, ptr %9) #3
  %15 = load ptr, ptr %7, align 8, !tbaa !9
  %16 = load i64, ptr %5, align 8, !tbaa !5
  %17 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %15, i64 noundef %16)
  %18 = getelementptr inbounds { ptr, i64 }, ptr %9, i32 0, i32 0
  %19 = extractvalue { ptr, i64 } %17, 0
  store ptr %19, ptr %18, align 8
  %20 = getelementptr inbounds { ptr, i64 }, ptr %9, i32 0, i32 1
  %21 = extractvalue { ptr, i64 } %17, 1
  store i64 %21, ptr %20, align 8
  %22 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %9) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %9) #3
  br i1 %22, label %23, label %24

23:                                               ; preds = %4
  br label %77

24:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 16, ptr %10) #3
  %25 = load ptr, ptr %7, align 8, !tbaa !9
  %26 = load i64, ptr %5, align 8, !tbaa !5
  %27 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %25, i64 noundef %26)
  %28 = getelementptr inbounds { ptr, i64 }, ptr %10, i32 0, i32 0
  %29 = extractvalue { ptr, i64 } %27, 0
  store ptr %29, ptr %28, align 8
  %30 = getelementptr inbounds { ptr, i64 }, ptr %10, i32 0, i32 1
  %31 = extractvalue { ptr, i64 } %27, 1
  store i64 %31, ptr %30, align 8
  %32 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt14_Bit_referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16) %10, i1 noundef zeroext true) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %10) #3
  %33 = load ptr, ptr %6, align 8, !tbaa !9
  %34 = load i64, ptr %5, align 8, !tbaa !5
  %35 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %33, i64 noundef %34) #3
  %36 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %35) #3
  %37 = icmp ne i64 %36, 2
  br i1 %37, label %38, label %40

38:                                               ; preds = %24
  %39 = load ptr, ptr %8, align 8, !tbaa !9
  store i8 0, ptr %39, align 1, !tbaa !11
  br label %40

40:                                               ; preds = %38, %24
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  store i64 0, ptr %11, align 8, !tbaa !5
  br label %41

41:                                               ; preds = %73, %40
  %42 = load i64, ptr %11, align 8, !tbaa !5
  %43 = load ptr, ptr %6, align 8, !tbaa !9
  %44 = load i64, ptr %5, align 8, !tbaa !5
  %45 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %43, i64 noundef %44) #3
  %46 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %45) #3
  %47 = icmp ult i64 %42, %46
  br i1 %47, label %49, label %48

48:                                               ; preds = %41
  store i32 2, ptr %12, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  br label %76

49:                                               ; preds = %41
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #3
  %50 = load ptr, ptr %6, align 8, !tbaa !9
  %51 = load i64, ptr %5, align 8, !tbaa !5
  %52 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %50, i64 noundef %51) #3
  %53 = load i64, ptr %11, align 8, !tbaa !5
  %54 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %52, i64 noundef %53) #3
  %55 = load i64, ptr %54, align 8, !tbaa !5
  store i64 %55, ptr %13, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %14) #3
  %56 = load ptr, ptr %7, align 8, !tbaa !9
  %57 = load i64, ptr %13, align 8, !tbaa !5
  %58 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %56, i64 noundef %57)
  %59 = getelementptr inbounds { ptr, i64 }, ptr %14, i32 0, i32 0
  %60 = extractvalue { ptr, i64 } %58, 0
  store ptr %60, ptr %59, align 8
  %61 = getelementptr inbounds { ptr, i64 }, ptr %14, i32 0, i32 1
  %62 = extractvalue { ptr, i64 } %58, 1
  store i64 %62, ptr %61, align 8
  %63 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %14) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %14) #3
  br i1 %63, label %64, label %65

64:                                               ; preds = %49
  store i32 4, ptr %12, align 4
  br label %70

65:                                               ; preds = %49
  %66 = load i64, ptr %13, align 8, !tbaa !5
  %67 = load ptr, ptr %6, align 8, !tbaa !9
  %68 = load ptr, ptr %7, align 8, !tbaa !9
  %69 = load ptr, ptr %8, align 8, !tbaa !9
  call void @_Z3dfslRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERb(i64 noundef %66, ptr noundef nonnull align 8 dereferenceable(24) %67, ptr noundef nonnull align 8 dereferenceable(40) %68, ptr noundef nonnull align 1 dereferenceable(1) %69)
  store i32 0, ptr %12, align 4
  br label %70

70:                                               ; preds = %65, %64
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #3
  %71 = load i32, ptr %12, align 4
  switch i32 %71, label %78 [
    i32 0, label %72
    i32 4, label %73
  ]

72:                                               ; preds = %70
  br label %73

73:                                               ; preds = %72, %70
  %74 = load i64, ptr %11, align 8, !tbaa !5
  %75 = add nsw i64 %74, 1
  store i64 %75, ptr %11, align 8, !tbaa !5
  br label %41, !llvm.loop !13

76:                                               ; preds = %48
  br label %77

77:                                               ; preds = %76, %23
  ret void

78:                                               ; preds = %70
  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 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 = !{!12, !12, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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 @_Z3dfslRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERb(i64 noundef %0, ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(40) %2, ptr nocapture noundef nonnull writeonly align 1 dereferenceable(1) %3) local_unnamed_addr #0 {
  %5 = alloca %"struct.std::_Bit_reference", align 8
  %6 = alloca %"struct.std::_Bit_reference", align 8
  %7 = alloca %"struct.std::_Bit_reference", align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %5) #3
  %8 = tail call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %0)
  %9 = extractvalue { ptr, i64 } %8, 0
  store ptr %9, ptr %5, align 8
  %10 = getelementptr inbounds i8, ptr %5, i64 8
  %11 = extractvalue { ptr, i64 } %8, 1
  store i64 %11, ptr %10, align 8
  %12 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %5) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %5) #3
  br i1 %12, label %.loopexit, label %13

13:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %6) #3
  %14 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %0)
  %15 = extractvalue { ptr, i64 } %14, 0
  store ptr %15, ptr %6, align 8
  %16 = getelementptr inbounds i8, ptr %6, i64 8
  %17 = extractvalue { ptr, i64 } %14, 1
  store i64 %17, ptr %16, align 8
  %18 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt14_Bit_referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16) %6, i1 noundef zeroext true) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %6) #3
  %19 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %0) #3
  %20 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %19) #3
  %.not = icmp eq i64 %20, 2
  br i1 %.not, label %22, label %21

21:                                               ; preds = %13
  store i8 0, ptr %3, align 1, !tbaa !5
  br label %22

22:                                               ; preds = %21, %13
  %23 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %0) #3
  %24 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %23) #3
  %.not20 = icmp eq i64 %24, 0
  br i1 %.not20, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %22
  %25 = getelementptr inbounds i8, ptr %7, i64 8
  br label %26

26:                                               ; preds = %.lr.ph, %35
  %.019 = phi i64 [ 0, %.lr.ph ], [ %36, %35 ]
  %27 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %0) #3
  %28 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %27, i64 noundef %.019) #3
  %29 = load i64, ptr %28, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %7) #3
  %30 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %29)
  %31 = extractvalue { ptr, i64 } %30, 0
  store ptr %31, ptr %7, align 8
  %32 = extractvalue { ptr, i64 } %30, 1
  store i64 %32, ptr %25, align 8
  %33 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %7) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %7) #3
  br i1 %33, label %35, label %34

34:                                               ; preds = %26
  call void @_Z3dfslRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERb(i64 noundef %29, ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(40) %2, ptr noundef nonnull align 1 dereferenceable(1) %3)
  br label %35

35:                                               ; preds = %26, %34
  %36 = add nuw nsw i64 %.019, 1
  %37 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %0) #3
  %38 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %37) #3
  %39 = icmp ult i64 %36, %38
  br i1 %39, label %26, label %.loopexit, !llvm.loop !11

.loopexit:                                        ; preds = %35, %22, %4
  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 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 = !{!"bool", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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