; LLVM IR from chachaxw/data-structure-and-algorithm :: leetcode/binary_tree/binary_tree.ll (Z28iterativePostOrderTraversal2P8TreeNode)

; 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::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 }
%"class.std::stack" = type { %"class.std::deque" }
%"class.std::deque" = type { %"class.std::_Deque_base" }
%"class.std::_Deque_base" = type { %"struct.std::_Deque_base<TreeNode *, std::allocator<TreeNode *>>::_Deque_impl" }
%"struct.std::_Deque_base<TreeNode *, std::allocator<TreeNode *>>::_Deque_impl" = type { %"struct.std::_Deque_base<TreeNode *, std::allocator<TreeNode *>>::_Deque_impl_data" }
%"struct.std::_Deque_base<TreeNode *, std::allocator<TreeNode *>>::_Deque_impl_data" = type { ptr, i64, %"struct.std::_Deque_iterator", %"struct.std::_Deque_iterator" }
%"struct.std::_Deque_iterator" = type { ptr, ptr, ptr, ptr }
%struct.TreeNode = type { i32, i32, ptr, ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [20 x i8], align 1

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; 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

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #3 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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEEC2IS4_vEEv(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80)) #4 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80), ptr noundef nonnull align 8 dereferenceable(8)) #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE3topEv(ptr noundef nonnull align 8 dereferenceable(80)) #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE3popEv(ptr noundef nonnull align 8 dereferenceable(80)) #4 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #5 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z28iterativePostOrderTraversal2P8TreeNode(ptr noundef %0) #3 personality ptr @__gxx_personality_v0 {
  %2 = alloca ptr, align 8
  %3 = alloca %"class.std::stack", align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %13

10:                                               ; preds = %1
  %11 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
  %12 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %11, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  br label %13

13:                                               ; preds = %10, %1
  call void @llvm.lifetime.start.p0(i64 80, ptr %3) #6
  call void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEEC2IS4_vEEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #6
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #6
  store ptr null, ptr %5, align 8, !tbaa !5
  invoke void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80) %3, ptr noundef nonnull align 8 dereferenceable(8) %2)
          to label %14 unwind label %56

14:                                               ; preds = %13
  br label %15

15:                                               ; preds = %79, %14
  %16 = invoke noundef zeroext i1 @_ZNKSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
          to label %17 unwind label %56

17:                                               ; preds = %15
  %18 = zext i1 %16 to i32
  %19 = icmp ne i32 %18, 1
  br i1 %19, label %20, label %80

20:                                               ; preds = %17
  %21 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
          to label %22 unwind label %56

22:                                               ; preds = %20
  %23 = load ptr, ptr %21, align 8, !tbaa !5
  store ptr %23, ptr %4, align 8, !tbaa !5
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.TreeNode, ptr %24, i32 0, i32 2
  %26 = load ptr, ptr %25, align 8, !tbaa !9
  %27 = icmp eq ptr %26, null
  br i1 %27, label %28, label %33

28:                                               ; preds = %22
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.TreeNode, ptr %29, i32 0, i32 3
  %31 = load ptr, ptr %30, align 8, !tbaa !12
  %32 = icmp eq ptr %31, null
  br i1 %32, label %48, label %33

33:                                               ; preds = %28, %22
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = icmp ne ptr %34, null
  br i1 %35, label %36, label %60

36:                                               ; preds = %33
  %37 = load ptr, ptr %5, align 8, !tbaa !5
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.TreeNode, ptr %38, i32 0, i32 2
  %40 = load ptr, ptr %39, align 8, !tbaa !9
  %41 = icmp eq ptr %37, %40
  br i1 %41, label %48, label %42

42:                                               ; preds = %36
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  %44 = load ptr, ptr %4, align 8, !tbaa !5
  %45 = getelementptr inbounds %struct.TreeNode, ptr %44, i32 0, i32 3
  %46 = load ptr, ptr %45, align 8, !tbaa !12
  %47 = icmp eq ptr %43, %46
  br i1 %47, label %48, label %60

48:                                               ; preds = %42, %36, %28
  %49 = load ptr, ptr %4, align 8, !tbaa !5
  %50 = getelementptr inbounds %struct.TreeNode, ptr %49, i32 0, i32 0
  %51 = load i32, ptr %50, align 8, !tbaa !13
  %52 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %51)
          to label %53 unwind label %56

53:                                               ; preds = %48
  invoke void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
          to label %54 unwind label %56

54:                                               ; preds = %53
  %55 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %55, ptr %5, align 8, !tbaa !5
  br label %79

56:                                               ; preds = %74, %65, %53, %48, %20, %15, %13
  %57 = landingpad { ptr, i32 }
          cleanup
  %58 = extractvalue { ptr, i32 } %57, 0
  store ptr %58, ptr %6, align 8
  %59 = extractvalue { ptr, i32 } %57, 1
  store i32 %59, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #6
  call void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %3) #6
  call void @llvm.lifetime.end.p0(i64 80, ptr %3) #6
  br label %81

60:                                               ; preds = %42, %33
  %61 = load ptr, ptr %4, align 8, !tbaa !5
  %62 = getelementptr inbounds %struct.TreeNode, ptr %61, i32 0, i32 3
  %63 = load ptr, ptr %62, align 8, !tbaa !12
  %64 = icmp ne ptr %63, null
  br i1 %64, label %65, label %69

65:                                               ; preds = %60
  %66 = load ptr, ptr %4, align 8, !tbaa !5
  %67 = getelementptr inbounds %struct.TreeNode, ptr %66, i32 0, i32 3
  invoke void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80) %3, ptr noundef nonnull align 8 dereferenceable(8) %67)
          to label %68 unwind label %56

68:                                               ; preds = %65
  br label %69

69:                                               ; preds = %68, %60
  %70 = load ptr, ptr %4, align 8, !tbaa !5
  %71 = getelementptr inbounds %struct.TreeNode, ptr %70, i32 0, i32 2
  %72 = load ptr, ptr %71, align 8, !tbaa !9
  %73 = icmp ne ptr %72, null
  br i1 %73, label %74, label %78

74:                                               ; preds = %69
  %75 = load ptr, ptr %4, align 8, !tbaa !5
  %76 = getelementptr inbounds %struct.TreeNode, ptr %75, i32 0, i32 2
  invoke void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80) %3, ptr noundef nonnull align 8 dereferenceable(8) %76)
          to label %77 unwind label %56

77:                                               ; preds = %74
  br label %78

78:                                               ; preds = %77, %69
  br label %79

79:                                               ; preds = %78, %54
  br label %15, !llvm.loop !14

80:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #6
  call void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %3) #6
  call void @llvm.lifetime.end.p0(i64 80, ptr %3) #6
  ret void

81:                                               ; preds = %56
  %82 = load ptr, ptr %6, align 8
  %83 = load i32, ptr %7, align 4
  %84 = insertvalue { ptr, i32 } poison, ptr %82, 0
  %85 = insertvalue { ptr, i32 } %84, i32 %83, 1
  resume { ptr, i32 } %85
}

attributes #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 = { 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 = { 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 #4 = { 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 #5 = { 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 #6 = { 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 = !{!"_ZTS8TreeNode", !11, i64 0, !11, i64 4, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 16}
!13 = !{!10, !11, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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::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 }
%"class.std::stack" = type { %"class.std::deque" }
%"class.std::deque" = type { %"class.std::_Deque_base" }
%"class.std::_Deque_base" = type { %"struct.std::_Deque_base<TreeNode *, std::allocator<TreeNode *>>::_Deque_impl" }
%"struct.std::_Deque_base<TreeNode *, std::allocator<TreeNode *>>::_Deque_impl" = type { %"struct.std::_Deque_base<TreeNode *, std::allocator<TreeNode *>>::_Deque_impl_data" }
%"struct.std::_Deque_base<TreeNode *, std::allocator<TreeNode *>>::_Deque_impl_data" = type { ptr, i64, %"struct.std::_Deque_iterator", %"struct.std::_Deque_iterator" }
%"struct.std::_Deque_iterator" = type { ptr, ptr, ptr, ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [20 x i8], align 1

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; 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

; 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 #3 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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEEC2IS4_vEEv(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE3topEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE3popEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #4 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #5 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z28iterativePostOrderTraversal2P8TreeNode(ptr noundef %0) local_unnamed_addr #3 personality ptr @__gxx_personality_v0 {
  %2 = alloca ptr, align 8
  %3 = alloca %"class.std::stack", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = icmp eq ptr %0, null
  br i1 %4, label %5, label %8

5:                                                ; preds = %1
  %6 = 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 = 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_)
  br label %8

8:                                                ; preds = %5, %1
  call void @llvm.lifetime.start.p0(i64 80, ptr nonnull %3) #6
  call void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEEC2IS4_vEEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  invoke void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80) %3, ptr noundef nonnull align 8 dereferenceable(8) %2)
          to label %.preheader unwind label %.loopexit.split-lp

.preheader:                                       ; preds = %8
  %9 = call noundef zeroext i1 @_ZNKSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  br i1 %9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader, %38
  %.016 = phi ptr [ %.1, %38 ], [ null, %.preheader ]
  %10 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  %11 = load ptr, ptr %10, align 8, !tbaa !5
  %12 = getelementptr inbounds i8, ptr %11, i64 8
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  %14 = icmp eq ptr %13, null
  br i1 %14, label %15, label %19

15:                                               ; preds = %.lr.ph
  %16 = getelementptr inbounds i8, ptr %11, i64 16
  %17 = load ptr, ptr %16, align 8, !tbaa !12
  %18 = icmp eq ptr %17, null
  br i1 %18, label %26, label %19

19:                                               ; preds = %15, %.lr.ph
  %.not = icmp eq ptr %.016, null
  br i1 %.not, label %._crit_edge17, label %20

._crit_edge17:                                    ; preds = %19
  %.phi.trans.insert = getelementptr inbounds i8, ptr %11, i64 16
  %.pre = load ptr, ptr %.phi.trans.insert, align 8, !tbaa !12
  br label %31

20:                                               ; preds = %19
  %21 = icmp eq ptr %.016, %13
  br i1 %21, label %26, label %22

22:                                               ; preds = %20
  %23 = getelementptr inbounds i8, ptr %11, i64 16
  %24 = load ptr, ptr %23, align 8, !tbaa !12
  %25 = icmp eq ptr %.016, %24
  br i1 %25, label %26, label %31

26:                                               ; preds = %22, %20, %15
  %27 = load i32, ptr %11, align 8, !tbaa !13
  %28 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %27)
          to label %29 unwind label %.loopexit

29:                                               ; preds = %26
  call void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  br label %38

.loopexit:                                        ; preds = %26, %33, %37
  %lpad.loopexit = landingpad { ptr, i32 }
          cleanup
  br label %30

.loopexit.split-lp:                               ; preds = %8
  %lpad.loopexit.split-lp = landingpad { ptr, i32 }
          cleanup
  br label %30

30:                                               ; preds = %.loopexit.split-lp, %.loopexit
  %lpad.phi = phi { ptr, i32 } [ %lpad.loopexit, %.loopexit ], [ %lpad.loopexit.split-lp, %.loopexit.split-lp ]
  call void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %3) #6
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %3) #6
  resume { ptr, i32 } %lpad.phi

31:                                               ; preds = %._crit_edge17, %22
  %32 = phi ptr [ %.pre, %._crit_edge17 ], [ %24, %22 ]
  %.not14 = icmp eq ptr %32, null
  br i1 %.not14, label %35, label %33

33:                                               ; preds = %31
  %34 = getelementptr inbounds i8, ptr %11, i64 16
  invoke void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80) %3, ptr noundef nonnull align 8 dereferenceable(8) %34)
          to label %._crit_edge18 unwind label %.loopexit

._crit_edge18:                                    ; preds = %33
  %.pre19 = load ptr, ptr %12, align 8, !tbaa !9
  br label %35

35:                                               ; preds = %._crit_edge18, %31
  %36 = phi ptr [ %.pre19, %._crit_edge18 ], [ %13, %31 ]
  %.not15 = icmp eq ptr %36, null
  br i1 %.not15, label %38, label %37

37:                                               ; preds = %35
  invoke void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE4pushERKS1_(ptr noundef nonnull align 8 dereferenceable(80) %3, ptr noundef nonnull align 8 dereferenceable(8) %12)
          to label %38 unwind label %.loopexit

38:                                               ; preds = %35, %37, %29
  %.1 = phi ptr [ %11, %29 ], [ %.016, %37 ], [ %.016, %35 ]
  %39 = call noundef zeroext i1 @_ZNKSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  br i1 %39, label %._crit_edge, label %.lr.ph, !llvm.loop !14

._crit_edge:                                      ; preds = %38, %.preheader
  call void @_ZNSt5stackIP8TreeNodeSt5dequeIS1_SaIS1_EEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %3) #6
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %3) #6
  ret void
}

attributes #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 = { 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 = { 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 #4 = { 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 #5 = { 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 #6 = { 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 = !{!"_ZTS8TreeNode", !11, i64 0, !11, i64 4, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 16}
!13 = !{!10, !11, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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