; LLVM IR from UtkarshPathrabe/Competitive-Coding :: Model Algorithms/Graphs/Depth First Search.ll (Z3DFSi)

; 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<Nodes, std::allocator<Nodes>>::_Vector_impl" }
%"struct.std::_Vector_base<Nodes, std::allocator<Nodes>>::_Vector_impl" = type { %"struct.std::_Vector_base<Nodes, std::allocator<Nodes>>::_Vector_impl_data" }
%"struct.std::_Vector_base<Nodes, std::allocator<Nodes>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%struct.Nodes = type { i8, i32, i32, i32, i32, i32 }

@Node = external dso_local global %"class.std::vector", align 8
@n = external dso_local global i32, align 4
@timer = external dso_local global i32, align 4
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str.7 = external hidden unnamed_addr constant [66 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [8 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z10DFSUtilityiRSt6vectorI5NodesSaIS0_EE(i32 noundef, ptr noundef nonnull align 8 dereferenceable(24)) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #2

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #4

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3DFSi(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %5 = call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef 0) #5
  %6 = getelementptr inbounds %struct.Nodes, ptr %5, i32 0, i32 0
  store i8 98, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %33, %1
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = load i32, ptr @n, align 4, !tbaa !5
  %10 = icmp sle i32 %8, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  br label %36

12:                                               ; preds = %7
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %14) #5
  %16 = getelementptr inbounds %struct.Nodes, ptr %15, i32 0, i32 0
  store i8 119, ptr %16, align 4, !tbaa !9
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %18) #5
  %20 = getelementptr inbounds %struct.Nodes, ptr %19, i32 0, i32 1
  store i32 -2147483648, ptr %20, align 4, !tbaa !11
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %22) #5
  %24 = getelementptr inbounds %struct.Nodes, ptr %23, i32 0, i32 2
  store i32 -2147483648, ptr %24, align 4, !tbaa !12
  %25 = load i32, ptr %3, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %26) #5
  %28 = getelementptr inbounds %struct.Nodes, ptr %27, i32 0, i32 3
  store i32 -2147483648, ptr %28, align 4, !tbaa !13
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %30) #5
  %32 = getelementptr inbounds %struct.Nodes, ptr %31, i32 0, i32 4
  store i32 -2147483648, ptr %32, align 4, !tbaa !14
  br label %33

33:                                               ; preds = %12
  %34 = load i32, ptr %3, align 4, !tbaa !5
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %3, align 4, !tbaa !5
  br label %7, !llvm.loop !15

36:                                               ; preds = %11
  store i32 0, ptr @timer, align 4, !tbaa !5
  %37 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.7)
  %38 = load i32, ptr %2, align 4, !tbaa !5
  %39 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %37, i32 noundef %38)
  %40 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %39, ptr noundef @.str.8)
  %41 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %40, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %42 = load i32, ptr %2, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %43) #5
  %45 = getelementptr inbounds %struct.Nodes, ptr %44, i32 0, i32 1
  store i32 0, ptr %45, align 4, !tbaa !11
  %46 = load i32, ptr %2, align 4, !tbaa !5
  %47 = sext i32 %46 to i64
  %48 = call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %47) #5
  %49 = getelementptr inbounds %struct.Nodes, ptr %48, i32 0, i32 2
  store i32 0, ptr %49, align 4, !tbaa !12
  %50 = load i32, ptr %2, align 4, !tbaa !5
  call void @_Z10DFSUtilityiRSt6vectorI5NodesSaIS0_EE(i32 noundef %50, ptr noundef nonnull align 8 dereferenceable(24) @Node)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  store i32 1, ptr %4, align 4, !tbaa !5
  br label %51

51:                                               ; preds = %75, %36
  %52 = load i32, ptr %4, align 4, !tbaa !5
  %53 = load i32, ptr @n, align 4, !tbaa !5
  %54 = icmp sle i32 %52, %53
  br i1 %54, label %56, label %55

55:                                               ; preds = %51
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  br label %78

56:                                               ; preds = %51
  %57 = load i32, ptr %4, align 4, !tbaa !5
  %58 = sext i32 %57 to i64
  %59 = call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %58) #5
  %60 = getelementptr inbounds %struct.Nodes, ptr %59, i32 0, i32 0
  %61 = load i8, ptr %60, align 4, !tbaa !9
  %62 = sext i8 %61 to i32
  %63 = icmp eq i32 %62, 119
  br i1 %63, label %64, label %74

64:                                               ; preds = %56
  %65 = load i32, ptr %4, align 4, !tbaa !5
  %66 = sext i32 %65 to i64
  %67 = call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %66) #5
  %68 = getelementptr inbounds %struct.Nodes, ptr %67, i32 0, i32 1
  store i32 0, ptr %68, align 4, !tbaa !11
  %69 = load i32, ptr %4, align 4, !tbaa !5
  %70 = sext i32 %69 to i64
  %71 = call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %70) #5
  %72 = getelementptr inbounds %struct.Nodes, ptr %71, i32 0, i32 2
  store i32 0, ptr %72, align 4, !tbaa !12
  %73 = load i32, ptr %4, align 4, !tbaa !5
  call void @_Z10DFSUtilityiRSt6vectorI5NodesSaIS0_EE(i32 noundef %73, ptr noundef nonnull align 8 dereferenceable(24) @Node)
  br label %74

74:                                               ; preds = %64, %56
  br label %75

75:                                               ; preds = %74
  %76 = load i32, ptr %4, align 4, !tbaa !5
  %77 = add nsw i32 %76, 1
  store i32 %77, ptr %4, align 4, !tbaa !5
  br label %51, !llvm.loop !17

78:                                               ; preds = %55
  %79 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  ret void
}

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #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 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 #2 = { inlinehint 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 #3 = { "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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { 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 = !{!10, !7, i64 0}
!10 = !{!"_ZTS5Nodes", !7, i64 0, !6, i64 4, !6, i64 8, !6, i64 12, !6, i64 16, !6, i64 20}
!11 = !{!10, !6, i64 4}
!12 = !{!10, !6, i64 8}
!13 = !{!10, !6, i64 12}
!14 = !{!10, !6, i64 16}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = distinct !{!17, !16}


; 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<Nodes, std::allocator<Nodes>>::_Vector_impl" }
%"struct.std::_Vector_base<Nodes, std::allocator<Nodes>>::_Vector_impl" = type { %"struct.std::_Vector_base<Nodes, std::allocator<Nodes>>::_Vector_impl_data" }
%"struct.std::_Vector_base<Nodes, std::allocator<Nodes>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@Node = external dso_local global %"class.std::vector", align 8
@n = external dso_local local_unnamed_addr global i32, align 4
@timer = external dso_local local_unnamed_addr global i32, align 4
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str.7 = external hidden unnamed_addr constant [66 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [8 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z10DFSUtilityiRSt6vectorI5NodesSaIS0_EE(i32 noundef, ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #2

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3DFSi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef 0) #4
  store i8 98, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr @n, align 4, !tbaa !10
  %.not19 = icmp slt i32 %3, 1
  br i1 %.not19, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %1
  store i32 0, ptr @timer, align 4, !tbaa !10
  %4 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str.7)
  %5 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %4, i32 noundef %0)
  %6 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull @.str.8)
  %7 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %8 = sext i32 %0 to i64
  %9 = tail call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %8) #4
  %10 = getelementptr inbounds i8, ptr %9, i64 4
  store i32 0, ptr %10, align 4, !tbaa !11
  %11 = tail call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %8) #4
  %12 = getelementptr inbounds i8, ptr %11, i64 8
  store i32 0, ptr %12, align 4, !tbaa !12
  tail call void @_Z10DFSUtilityiRSt6vectorI5NodesSaIS0_EE(i32 noundef %0, ptr noundef nonnull align 8 dereferenceable(24) @Node)
  %13 = load i32, ptr @n, align 4, !tbaa !10
  %.not1821 = icmp slt i32 %13, 1
  br i1 %.not1821, label %._crit_edge25, label %.lr.ph24

.lr.ph:                                           ; preds = %1, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 1, %1 ]
  %14 = tail call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %indvars.iv) #4
  store i8 119, ptr %14, align 4, !tbaa !5
  %15 = tail call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %indvars.iv) #4
  %16 = getelementptr inbounds i8, ptr %15, i64 4
  store i32 -2147483648, ptr %16, align 4, !tbaa !11
  %17 = tail call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %indvars.iv) #4
  %18 = getelementptr inbounds i8, ptr %17, i64 8
  store i32 -2147483648, ptr %18, align 4, !tbaa !12
  %19 = tail call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %indvars.iv) #4
  %20 = getelementptr inbounds i8, ptr %19, i64 12
  store i32 -2147483648, ptr %20, align 4, !tbaa !13
  %21 = tail call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %indvars.iv) #4
  %22 = getelementptr inbounds i8, ptr %21, i64 16
  store i32 -2147483648, ptr %22, align 4, !tbaa !14
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %23 = load i32, ptr @n, align 4, !tbaa !10
  %24 = sext i32 %23 to i64
  %.not.not = icmp slt i64 %indvars.iv, %24
  br i1 %.not.not, label %.lr.ph, label %._crit_edge, !llvm.loop !15

._crit_edge25:                                    ; preds = %35, %._crit_edge
  %25 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  ret void

.lr.ph24:                                         ; preds = %._crit_edge, %35
  %indvars.iv27 = phi i64 [ %indvars.iv.next28, %35 ], [ 1, %._crit_edge ]
  %26 = tail call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %indvars.iv27) #4
  %27 = load i8, ptr %26, align 4, !tbaa !5
  %28 = icmp eq i8 %27, 119
  br i1 %28, label %29, label %35

29:                                               ; preds = %.lr.ph24
  %30 = tail call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %indvars.iv27) #4
  %31 = getelementptr inbounds i8, ptr %30, i64 4
  store i32 0, ptr %31, align 4, !tbaa !11
  %32 = tail call noundef nonnull align 4 dereferenceable(24) ptr @_ZNSt6vectorI5NodesSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @Node, i64 noundef %indvars.iv27) #4
  %33 = getelementptr inbounds i8, ptr %32, i64 8
  store i32 0, ptr %33, align 4, !tbaa !12
  %34 = trunc nuw nsw i64 %indvars.iv27 to i32
  tail call void @_Z10DFSUtilityiRSt6vectorI5NodesSaIS0_EE(i32 noundef %34, ptr noundef nonnull align 8 dereferenceable(24) @Node)
  br label %35

35:                                               ; preds = %.lr.ph24, %29
  %indvars.iv.next28 = add nuw nsw i64 %indvars.iv27, 1
  %36 = load i32, ptr @n, align 4, !tbaa !10
  %37 = sext i32 %36 to i64
  %.not18.not = icmp slt i64 %indvars.iv27, %37
  br i1 %.not18.not, label %.lr.ph24, label %._crit_edge25, !llvm.loop !17
}

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #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 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 #2 = { inlinehint 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 #3 = { "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, !7, i64 0}
!6 = !{!"_ZTS5Nodes", !7, i64 0, !9, i64 4, !9, i64 8, !9, i64 12, !9, i64 16, !9, i64 20}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!9, !9, i64 0}
!11 = !{!6, !9, i64 4}
!12 = !{!6, !9, i64 8}
!13 = !{!6, !9, i64 12}
!14 = !{!6, !9, i64 16}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = distinct !{!17, !16}


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