; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 17. Graph/traversaldfs.ll (Z4dfs3PSt6vectorIiSaIiEEi)

; 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.0" = type { %"struct.std::_Bvector_base" }
%"struct.std::_Bvector_base" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" = type { %"struct.std::_Bit_iterator", %"struct.std::_Bit_iterator", ptr }
%"struct.std::_Bit_iterator" = type { %"struct.std::_Bit_iterator_base.base", [4 x i8] }
%"struct.std::_Bit_iterator_base.base" = type <{ ptr, i32 }>
%"class.std::allocator.4" = type { i8 }
%"struct.std::_Bit_reference" = type { ptr, i64 }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) #1 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) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSaIbEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIbSaIbEEC2EmRKbRKS0_(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1), ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z7dfsrec2PSt6vectorIiSaIiEEiRS_IbSaIbEE(ptr noundef, i32 noundef, ptr noundef nonnull align 8 dereferenceable(40)) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4dfs3PSt6vectorIiSaIiEEi(ptr noundef %0, i32 noundef %1) #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %"class.std::vector.0", align 8
  %7 = alloca i8, align 1
  %8 = alloca %"class.std::allocator.4", align 1
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca %"struct.std::_Bit_reference", align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 40, ptr %6) #3
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = sext i32 %13 to i64
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #3
  store i8 0, ptr %7, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 1, ptr %8) #3
  call void @_ZNSaIbEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %8) #3
  invoke void @_ZNSt6vectorIbSaIbEEC2EmRKbRKS0_(ptr noundef nonnull align 8 dereferenceable(40) %6, i64 noundef %14, ptr noundef nonnull align 1 dereferenceable(1) %7, ptr noundef nonnull align 1 dereferenceable(1) %8)
          to label %15 unwind label %21

15:                                               ; preds = %2
  call void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %8) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  store i32 0, ptr %11, align 4, !tbaa !9
  br label %16

16:                                               ; preds = %50, %15
  %17 = load i32, ptr %11, align 4, !tbaa !9
  %18 = load i32, ptr %4, align 4, !tbaa !9
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %25, label %20

20:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %54

21:                                               ; preds = %2
  %22 = landingpad { ptr, i32 }
          cleanup
  %23 = extractvalue { ptr, i32 } %22, 0
  store ptr %23, ptr %9, align 8
  %24 = extractvalue { ptr, i32 } %22, 1
  store i32 %24, ptr %10, align 4
  call void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %8) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #3
  br label %55

25:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 16, ptr %12) #3
  %26 = load i32, ptr %11, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = invoke { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %6, i64 noundef %27)
          to label %29 unwind label %41

29:                                               ; preds = %25
  %30 = getelementptr inbounds { ptr, i64 }, ptr %12, i32 0, i32 0
  %31 = extractvalue { ptr, i64 } %28, 0
  store ptr %31, ptr %30, align 8
  %32 = getelementptr inbounds { ptr, i64 }, ptr %12, i32 0, i32 1
  %33 = extractvalue { ptr, i64 } %28, 1
  store i64 %33, ptr %32, align 8
  %34 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %12) #3
  %35 = zext i1 %34 to i32
  %36 = icmp eq i32 %35, 0
  call void @llvm.lifetime.end.p0(i64 16, ptr %12) #3
  br i1 %36, label %37, label %49

37:                                               ; preds = %29
  %38 = load ptr, ptr %3, align 8, !tbaa !5
  %39 = load i32, ptr %11, align 4, !tbaa !9
  invoke void @_Z7dfsrec2PSt6vectorIiSaIiEEiRS_IbSaIbEE(ptr noundef %38, i32 noundef %39, ptr noundef nonnull align 8 dereferenceable(40) %6)
          to label %40 unwind label %45

40:                                               ; preds = %37
  br label %49

41:                                               ; preds = %25
  %42 = landingpad { ptr, i32 }
          cleanup
  %43 = extractvalue { ptr, i32 } %42, 0
  store ptr %43, ptr %9, align 8
  %44 = extractvalue { ptr, i32 } %42, 1
  store i32 %44, ptr %10, align 4
  call void @llvm.lifetime.end.p0(i64 16, ptr %12) #3
  br label %53

45:                                               ; preds = %37
  %46 = landingpad { ptr, i32 }
          cleanup
  %47 = extractvalue { ptr, i32 } %46, 0
  store ptr %47, ptr %9, align 8
  %48 = extractvalue { ptr, i32 } %46, 1
  store i32 %48, ptr %10, align 4
  br label %53

49:                                               ; preds = %40, %29
  br label %50

50:                                               ; preds = %49
  %51 = load i32, ptr %11, align 4, !tbaa !9
  %52 = add nsw i32 %51, 1
  store i32 %52, ptr %11, align 4, !tbaa !9
  br label %16, !llvm.loop !13

53:                                               ; preds = %45, %41
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40) %6) #3
  br label %55

54:                                               ; preds = %20
  call void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40) %6) #3
  call void @llvm.lifetime.end.p0(i64 40, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret void

55:                                               ; preds = %53, %21
  call void @llvm.lifetime.end.p0(i64 40, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %56

56:                                               ; preds = %55
  %57 = load ptr, ptr %9, align 8
  %58 = load i32, ptr %10, align 4
  %59 = insertvalue { ptr, i32 } poison, ptr %57, 0
  %60 = insertvalue { ptr, i32 } %59, i32 %58, 1
  resume { ptr, i32 } %60
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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"

%"class.std::vector.0" = type { %"struct.std::_Bvector_base" }
%"struct.std::_Bvector_base" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" = type { %"struct.std::_Bit_iterator", %"struct.std::_Bit_iterator", ptr }
%"struct.std::_Bit_iterator" = type { %"struct.std::_Bit_iterator_base.base", [4 x i8] }
%"struct.std::_Bit_iterator_base.base" = type <{ ptr, i32 }>
%"class.std::allocator.4" = type { i8 }
%"struct.std::_Bit_reference" = type { ptr, i64 }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) local_unnamed_addr #1 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) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSaIbEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIbSaIbEEC2EmRKbRKS0_(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1), ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z7dfsrec2PSt6vectorIiSaIiEEiRS_IbSaIbEE(ptr noundef, i32 noundef, ptr noundef nonnull align 8 dereferenceable(40)) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4dfs3PSt6vectorIiSaIiEEi(ptr noundef %0, i32 noundef %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::vector.0", align 8
  %4 = alloca i8, align 1
  %5 = alloca %"class.std::allocator.4", align 1
  %6 = alloca %"struct.std::_Bit_reference", align 8
  call void @llvm.lifetime.start.p0(i64 40, ptr nonnull %3) #3
  %7 = sext i32 %1 to i64
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %4) #3
  store i8 0, ptr %4, align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %5) #3
  call void @_ZNSaIbEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #3
  invoke void @_ZNSt6vectorIbSaIbEEC2EmRKbRKS0_(ptr noundef nonnull align 8 dereferenceable(40) %3, i64 noundef %7, ptr noundef nonnull align 1 dereferenceable(1) %4, ptr noundef nonnull align 1 dereferenceable(1) %5)
          to label %8 unwind label %11

8:                                                ; preds = %2
  call void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %4) #3
  %9 = icmp sgt i32 %1, 0
  br i1 %9, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %8
  %10 = getelementptr inbounds i8, ptr %6, i64 8
  %wide.trip.count = zext nneg i32 %1 to i64
  br label %13

._crit_edge:                                      ; preds = %25, %8
  call void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40) %3) #3
  call void @llvm.lifetime.end.p0(i64 40, ptr nonnull %3) #3
  ret void

11:                                               ; preds = %2
  %12 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt15__new_allocatorIbED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %4) #3
  br label %27

13:                                               ; preds = %.lr.ph, %25
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %25 ]
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %6) #3
  %14 = invoke { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %3, i64 noundef %indvars.iv)
          to label %15 unwind label %21

15:                                               ; preds = %13
  %16 = extractvalue { ptr, i64 } %14, 0
  store ptr %16, ptr %6, align 8
  %17 = extractvalue { ptr, i64 } %14, 1
  store i64 %17, ptr %10, align 8
  %18 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %6) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %6) #3
  br i1 %18, label %25, label %19

19:                                               ; preds = %15
  %20 = trunc nuw nsw i64 %indvars.iv to i32
  invoke void @_Z7dfsrec2PSt6vectorIiSaIiEEiRS_IbSaIbEE(ptr noundef %0, i32 noundef %20, ptr noundef nonnull align 8 dereferenceable(40) %3)
          to label %25 unwind label %23

21:                                               ; preds = %13
  %22 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %6) #3
  br label %26

23:                                               ; preds = %19
  %24 = landingpad { ptr, i32 }
          cleanup
  br label %26

25:                                               ; preds = %15, %19
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %13, !llvm.loop !9

26:                                               ; preds = %23, %21
  %.pn = phi { ptr, i32 } [ %24, %23 ], [ %22, %21 ]
  call void @_ZNSt13_Bvector_baseISaIbEED2Ev(ptr noundef nonnull align 8 dereferenceable(40) %3) #3
  br label %27

27:                                               ; preds = %26, %11
  %.pn.pn = phi { ptr, i32 } [ %.pn, %26 ], [ %12, %11 ]
  call void @llvm.lifetime.end.p0(i64 40, ptr nonnull %3) #3
  resume { ptr, i32 } %.pn.pn
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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