; LLVM IR from upupming/algorithm :: wheel/treeTraversal.ll (Z4postB5cxx11P4Node)

; 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::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"class.std::stack" = type { %"class.std::deque" }
%"class.std::deque" = type { %"class.std::_Deque_base" }
%"class.std::_Deque_base" = type { %"struct.std::_Deque_base<Node *, std::allocator<Node *>>::_Deque_impl" }
%"struct.std::_Deque_base<Node *, std::allocator<Node *>>::_Deque_impl" = type { %"struct.std::_Deque_base<Node *, std::allocator<Node *>>::_Deque_impl_data" }
%"struct.std::_Deque_base<Node *, std::allocator<Node *>>::_Deque_impl_data" = type { ptr, i64, %"struct.std::_Deque_iterator", %"struct.std::_Deque_iterator" }
%"struct.std::_Deque_iterator" = type { ptr, ptr, ptr, ptr }
%struct.Node = type { i32, ptr, ptr }

@.str = external hidden unnamed_addr constant [2 x i8], align 1

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

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEOS8_PKS5_(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(32), ptr noundef) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt7__cxx119to_stringEi(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, i32 noundef) #2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #3 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 void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEEC2IS4_vEEv(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #4 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) #4 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80), ptr noundef nonnull align 8 dereferenceable(8)) #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80)) #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE3topEv(ptr noundef nonnull align 8 dereferenceable(80)) #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE3popEv(ptr noundef nonnull align 8 dereferenceable(80)) #3 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4postB5cxx11P4Node(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef %1) #4 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i1, align 1
  %6 = alloca %"class.std::stack", align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca %"class.std::__cxx11::basic_string", align 8
  %12 = alloca %"class.std::__cxx11::basic_string", align 8
  store ptr %0, ptr %3, align 8
  store ptr %1, ptr %4, align 8, !tbaa !5
  store i1 false, ptr %5, align 1
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #5
  call void @llvm.lifetime.start.p0(i64 80, ptr %6) #5
  invoke void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEEC2IS4_vEEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
          to label %13 unwind label %34

13:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %14, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #5
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %15, ptr %10, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %78, %13
  %17 = load ptr, ptr %9, align 8, !tbaa !5
  %18 = icmp ne ptr %17, null
  br i1 %18, label %23, label %19

19:                                               ; preds = %16
  %20 = invoke noundef zeroext i1 @_ZNKSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
          to label %21 unwind label %38

21:                                               ; preds = %19
  %22 = xor i1 %20, true
  br label %23

23:                                               ; preds = %21, %16
  %24 = phi i1 [ true, %16 ], [ %22, %21 ]
  br i1 %24, label %25, label %79

25:                                               ; preds = %23
  br label %26

26:                                               ; preds = %30, %25
  %27 = load ptr, ptr %9, align 8, !tbaa !5
  %28 = icmp ne ptr %27, null
  br i1 %28, label %29, label %42

29:                                               ; preds = %26
  invoke void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80) %6, ptr noundef nonnull align 8 dereferenceable(8) %9)
          to label %30 unwind label %38

30:                                               ; preds = %29
  %31 = load ptr, ptr %9, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.Node, ptr %31, i32 0, i32 1
  %33 = load ptr, ptr %32, align 8, !tbaa !9
  store ptr %33, ptr %9, align 8, !tbaa !5
  br label %26, !llvm.loop !12

34:                                               ; preds = %2
  %35 = landingpad { ptr, i32 }
          cleanup
  %36 = extractvalue { ptr, i32 } %35, 0
  store ptr %36, ptr %7, align 8
  %37 = extractvalue { ptr, i32 } %35, 1
  store i32 %37, ptr %8, align 4
  br label %82

38:                                               ; preds = %62, %42, %29, %19
  %39 = landingpad { ptr, i32 }
          cleanup
  %40 = extractvalue { ptr, i32 } %39, 0
  store ptr %40, ptr %7, align 8
  %41 = extractvalue { ptr, i32 } %39, 1
  store i32 %41, ptr %8, align 4
  br label %81

42:                                               ; preds = %26
  %43 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
          to label %44 unwind label %38

44:                                               ; preds = %42
  %45 = load ptr, ptr %43, align 8, !tbaa !5
  store ptr %45, ptr %9, align 8, !tbaa !5
  %46 = load ptr, ptr %9, align 8, !tbaa !5
  %47 = getelementptr inbounds %struct.Node, ptr %46, i32 0, i32 2
  %48 = load ptr, ptr %47, align 8, !tbaa !14
  %49 = icmp ne ptr %48, null
  br i1 %49, label %50, label %56

50:                                               ; preds = %44
  %51 = load ptr, ptr %9, align 8, !tbaa !5
  %52 = getelementptr inbounds %struct.Node, ptr %51, i32 0, i32 2
  %53 = load ptr, ptr %52, align 8, !tbaa !14
  %54 = load ptr, ptr %10, align 8, !tbaa !5
  %55 = icmp eq ptr %53, %54
  br i1 %55, label %56, label %74

56:                                               ; preds = %50, %44
  call void @llvm.lifetime.start.p0(i64 32, ptr %11) #5
  call void @llvm.lifetime.start.p0(i64 32, ptr %12) #5
  %57 = load ptr, ptr %9, align 8, !tbaa !5
  %58 = getelementptr inbounds %struct.Node, ptr %57, i32 0, i32 0
  %59 = load i32, ptr %58, align 8, !tbaa !15
  call void @_ZNSt7__cxx119to_stringEi(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %12, i32 noundef %59) #5
  invoke void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEOS8_PKS5_(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %11, ptr noundef nonnull align 8 dereferenceable(32) %12, ptr noundef @.str)
          to label %60 unwind label %65

60:                                               ; preds = %56
  %61 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLERKS4_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %11)
          to label %62 unwind label %69

62:                                               ; preds = %60
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %11) #5
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %12) #5
  call void @llvm.lifetime.end.p0(i64 32, ptr %12) #5
  call void @llvm.lifetime.end.p0(i64 32, ptr %11) #5
  invoke void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
          to label %63 unwind label %38

63:                                               ; preds = %62
  %64 = load ptr, ptr %9, align 8, !tbaa !5
  store ptr %64, ptr %10, align 8, !tbaa !5
  store ptr null, ptr %9, align 8, !tbaa !5
  br label %78

65:                                               ; preds = %56
  %66 = landingpad { ptr, i32 }
          cleanup
  %67 = extractvalue { ptr, i32 } %66, 0
  store ptr %67, ptr %7, align 8
  %68 = extractvalue { ptr, i32 } %66, 1
  store i32 %68, ptr %8, align 4
  br label %73

69:                                               ; preds = %60
  %70 = landingpad { ptr, i32 }
          cleanup
  %71 = extractvalue { ptr, i32 } %70, 0
  store ptr %71, ptr %7, align 8
  %72 = extractvalue { ptr, i32 } %70, 1
  store i32 %72, ptr %8, align 4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %11) #5
  br label %73

73:                                               ; preds = %69, %65
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %12) #5
  call void @llvm.lifetime.end.p0(i64 32, ptr %12) #5
  call void @llvm.lifetime.end.p0(i64 32, ptr %11) #5
  br label %81

74:                                               ; preds = %50
  %75 = load ptr, ptr %9, align 8, !tbaa !5
  %76 = getelementptr inbounds %struct.Node, ptr %75, i32 0, i32 2
  %77 = load ptr, ptr %76, align 8, !tbaa !14
  store ptr %77, ptr %9, align 8, !tbaa !5
  br label %78

78:                                               ; preds = %74, %63
  br label %16, !llvm.loop !16

79:                                               ; preds = %23
  store i1 true, ptr %5, align 1
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %6) #5
  call void @llvm.lifetime.end.p0(i64 80, ptr %6) #5
  %80 = load i1, ptr %5, align 1
  br i1 %80, label %84, label %83

81:                                               ; preds = %73, %38
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %6) #5
  br label %82

82:                                               ; preds = %81, %34
  call void @llvm.lifetime.end.p0(i64 80, ptr %6) #5
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #5
  br label %85

83:                                               ; preds = %79
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #5
  br label %84

84:                                               ; preds = %83, %79
  ret void

85:                                               ; preds = %82
  %86 = load ptr, ptr %7, align 8
  %87 = load i32, ptr %8, align 4
  %88 = insertvalue { ptr, i32 } poison, ptr %86, 0
  %89 = insertvalue { ptr, i32 } %88, i32 %87, 1
  resume { ptr, i32 } %89
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { inlinehint 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 = { 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 #4 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"_ZTS4Node", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!10, !6, i64 16}
!15 = !{!10, !11, i64 0}
!16 = distinct !{!16, !13}


; 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::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"class.std::stack" = type { %"class.std::deque" }
%"class.std::deque" = type { %"class.std::_Deque_base" }
%"class.std::_Deque_base" = type { %"struct.std::_Deque_base<Node *, std::allocator<Node *>>::_Deque_impl" }
%"struct.std::_Deque_base<Node *, std::allocator<Node *>>::_Deque_impl" = type { %"struct.std::_Deque_base<Node *, std::allocator<Node *>>::_Deque_impl_data" }
%"struct.std::_Deque_base<Node *, std::allocator<Node *>>::_Deque_impl_data" = type { ptr, i64, %"struct.std::_Deque_iterator", %"struct.std::_Deque_iterator" }
%"struct.std::_Deque_iterator" = type { ptr, ptr, ptr, ptr }

@.str = external hidden unnamed_addr constant [2 x i8], align 1

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

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEOS8_PKS5_(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(32), ptr noundef) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt7__cxx119to_stringEi(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, i32 noundef) local_unnamed_addr #2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #3 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 void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEEC2IS4_vEEv(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #4 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE3topEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE3popEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #3 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4postB5cxx11P4Node(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef %1) local_unnamed_addr #4 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::stack", align 8
  %4 = alloca ptr, align 8
  %5 = alloca %"class.std::__cxx11::basic_string", align 8
  %6 = alloca %"class.std::__cxx11::basic_string", align 8
  tail call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #5
  call void @llvm.lifetime.start.p0(i64 80, ptr nonnull %3) #5
  invoke void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEEC2IS4_vEEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
          to label %7 unwind label %15

7:                                                ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #5
  br label %.outer

.outer:                                           ; preds = %28, %7
  %storemerge14.ph = phi ptr [ null, %28 ], [ %1, %7 ]
  %.0.ph = phi ptr [ %29, %28 ], [ %1, %7 ]
  br label %8

8:                                                ; preds = %.outer, %._crit_edge
  %storemerge14 = phi ptr [ %22, %._crit_edge ], [ %storemerge14.ph, %.outer ]
  store ptr %storemerge14, ptr %4, align 8, !tbaa !5
  %.not = icmp eq ptr %storemerge14, null
  br i1 %.not, label %9, label %.lr.ph.preheader

9:                                                ; preds = %8
  %10 = call noundef zeroext i1 @_ZNKSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  br i1 %10, label %35, label %.critedge

.critedge:                                        ; preds = %9
  %.pr.pre = load ptr, ptr %4, align 8, !tbaa !5
  %.not1118 = icmp eq ptr %.pr.pre, null
  br i1 %.not1118, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %8, %.critedge
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %11
  invoke void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80) %3, ptr noundef nonnull align 8 dereferenceable(8) %4)
          to label %11 unwind label %17

11:                                               ; preds = %.lr.ph
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %12, i64 8
  %14 = load ptr, ptr %13, align 8, !tbaa !9
  store ptr %14, ptr %4, align 8, !tbaa !5
  %.not11 = icmp eq ptr %14, null
  br i1 %.not11, label %._crit_edge, label %.lr.ph, !llvm.loop !12

15:                                               ; preds = %2
  %16 = landingpad { ptr, i32 }
          cleanup
  br label %37

17:                                               ; preds = %.lr.ph
  %18 = landingpad { ptr, i32 }
          cleanup
  br label %36

._crit_edge:                                      ; preds = %11, %.critedge
  %19 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  %20 = load ptr, ptr %19, align 8, !tbaa !5
  store ptr %20, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds i8, ptr %20, i64 16
  %22 = load ptr, ptr %21, align 8, !tbaa !14
  %.not12 = icmp eq ptr %22, null
  %23 = icmp eq ptr %22, %.0.ph
  %or.cond = select i1 %.not12, i1 true, i1 %23
  br i1 %or.cond, label %24, label %8, !llvm.loop !15

24:                                               ; preds = %._crit_edge
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %5) #5
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %6) #5
  %25 = load i32, ptr %20, align 8, !tbaa !16
  call void @_ZNSt7__cxx119to_stringEi(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %6, i32 noundef %25) #5
  invoke void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEOS8_PKS5_(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %5, ptr noundef nonnull align 8 dereferenceable(32) %6, ptr noundef nonnull @.str)
          to label %26 unwind label %30

26:                                               ; preds = %24
  %27 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLERKS4_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %5)
          to label %28 unwind label %32

28:                                               ; preds = %26
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #5
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %6) #5
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %6) #5
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #5
  call void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  br label %.outer, !llvm.loop !15

30:                                               ; preds = %24
  %31 = landingpad { ptr, i32 }
          cleanup
  br label %34

32:                                               ; preds = %26
  %33 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #5
  br label %34

34:                                               ; preds = %32, %30
  %.pn = phi { ptr, i32 } [ %33, %32 ], [ %31, %30 ]
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %6) #5
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %6) #5
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #5
  br label %36

35:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #5
  call void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %3) #5
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %3) #5
  ret void

36:                                               ; preds = %34, %17
  %.pn15 = phi { ptr, i32 } [ %18, %17 ], [ %.pn, %34 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #5
  call void @_ZNSt5stackIP4NodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %3) #5
  br label %37

37:                                               ; preds = %36, %15
  %.pn15.pn = phi { ptr, i32 } [ %.pn15, %36 ], [ %16, %15 ]
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %3) #5
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #5
  resume { ptr, i32 } %.pn15.pn
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { inlinehint 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 = { 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 #4 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"_ZTS4Node", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!10, !6, i64 16}
!15 = distinct !{!15, !13}
!16 = !{!10, !11, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass