; LLVM IR from yanglr/leetcode-ac :: cpp-leetcode (leetcode103-zigzag-traverse_deque)

; 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.Solution = type { i8 }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%struct.TreeNode = type { i32, ptr, ptr }

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca %class.Solution, align 1
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca %"class.std::vector", align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 1, ptr %2) #6
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #6
  %7 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 24) #7
  invoke void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %7, i32 noundef 3)
          to label %8 unwind label %55

8:                                                ; preds = %0
  store ptr %7, ptr %3, align 8, !tbaa !5
  %9 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 24) #7
  invoke void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %9, i32 noundef 9)
          to label %10 unwind label %59

10:                                               ; preds = %8
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.TreeNode, ptr %11, i32 0, i32 1
  store ptr %9, ptr %12, align 8, !tbaa !9
  %13 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 24) #7
  invoke void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %13, i32 noundef 20)
          to label %14 unwind label %63

14:                                               ; preds = %10
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.TreeNode, ptr %15, i32 0, i32 2
  store ptr %13, ptr %16, align 8, !tbaa !12
  %17 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 24) #7
  invoke void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %17, i32 noundef 15)
          to label %18 unwind label %67

18:                                               ; preds = %14
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.TreeNode, ptr %19, i32 0, i32 2
  %21 = load ptr, ptr %20, align 8, !tbaa !12
  %22 = getelementptr inbounds %struct.TreeNode, ptr %21, i32 0, i32 1
  store ptr %17, ptr %22, align 8, !tbaa !9
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.TreeNode, ptr %23, i32 0, i32 2
  %25 = load ptr, ptr %24, align 8, !tbaa !12
  %26 = getelementptr inbounds %struct.TreeNode, ptr %25, i32 0, i32 1
  %27 = load ptr, ptr %26, align 8, !tbaa !9
  %28 = getelementptr inbounds %struct.TreeNode, ptr %27, i32 0, i32 1
  store ptr null, ptr %28, align 8, !tbaa !9
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.TreeNode, ptr %29, i32 0, i32 2
  %31 = load ptr, ptr %30, align 8, !tbaa !12
  %32 = getelementptr inbounds %struct.TreeNode, ptr %31, i32 0, i32 1
  %33 = load ptr, ptr %32, align 8, !tbaa !9
  %34 = getelementptr inbounds %struct.TreeNode, ptr %33, i32 0, i32 2
  store ptr null, ptr %34, align 8, !tbaa !12
  %35 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 24) #7
  invoke void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %35, i32 noundef 7)
          to label %36 unwind label %71

36:                                               ; preds = %18
  %37 = load ptr, ptr %3, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.TreeNode, ptr %37, i32 0, i32 2
  %39 = load ptr, ptr %38, align 8, !tbaa !12
  %40 = getelementptr inbounds %struct.TreeNode, ptr %39, i32 0, i32 2
  store ptr %35, ptr %40, align 8, !tbaa !12
  %41 = load ptr, ptr %3, align 8, !tbaa !5
  %42 = getelementptr inbounds %struct.TreeNode, ptr %41, i32 0, i32 2
  %43 = load ptr, ptr %42, align 8, !tbaa !12
  %44 = getelementptr inbounds %struct.TreeNode, ptr %43, i32 0, i32 2
  %45 = load ptr, ptr %44, align 8, !tbaa !12
  %46 = getelementptr inbounds %struct.TreeNode, ptr %45, i32 0, i32 1
  store ptr null, ptr %46, align 8, !tbaa !9
  %47 = load ptr, ptr %3, align 8, !tbaa !5
  %48 = getelementptr inbounds %struct.TreeNode, ptr %47, i32 0, i32 2
  %49 = load ptr, ptr %48, align 8, !tbaa !12
  %50 = getelementptr inbounds %struct.TreeNode, ptr %49, i32 0, i32 2
  %51 = load ptr, ptr %50, align 8, !tbaa !12
  %52 = getelementptr inbounds %struct.TreeNode, ptr %51, i32 0, i32 2
  store ptr null, ptr %52, align 8, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 24, ptr %6) #6
  %53 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_ZN8Solution16zigzagLevelOrderEP8TreeNode(ptr dead_on_unwind writable sret(%"class.std::vector") align 8 %6, ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef %53)
  store i32 0, ptr %1, align 4
  call void @_ZNSt6vectorIS_IiSaIiEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %6) #6
  call void @llvm.lifetime.end.p0(i64 24, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #6
  call void @llvm.lifetime.end.p0(i64 1, ptr %2) #6
  %54 = load i32, ptr %1, align 4
  ret i32 %54

55:                                               ; preds = %0
  %56 = landingpad { ptr, i32 }
          cleanup
  %57 = extractvalue { ptr, i32 } %56, 0
  store ptr %57, ptr %4, align 8
  %58 = extractvalue { ptr, i32 } %56, 1
  store i32 %58, ptr %5, align 4
  call void @_ZdlPvm(ptr noundef %7, i64 noundef 24) #8
  br label %75

59:                                               ; preds = %8
  %60 = landingpad { ptr, i32 }
          cleanup
  %61 = extractvalue { ptr, i32 } %60, 0
  store ptr %61, ptr %4, align 8
  %62 = extractvalue { ptr, i32 } %60, 1
  store i32 %62, ptr %5, align 4
  call void @_ZdlPvm(ptr noundef %9, i64 noundef 24) #8
  br label %75

63:                                               ; preds = %10
  %64 = landingpad { ptr, i32 }
          cleanup
  %65 = extractvalue { ptr, i32 } %64, 0
  store ptr %65, ptr %4, align 8
  %66 = extractvalue { ptr, i32 } %64, 1
  store i32 %66, ptr %5, align 4
  call void @_ZdlPvm(ptr noundef %13, i64 noundef 24) #8
  br label %75

67:                                               ; preds = %14
  %68 = landingpad { ptr, i32 }
          cleanup
  %69 = extractvalue { ptr, i32 } %68, 0
  store ptr %69, ptr %4, align 8
  %70 = extractvalue { ptr, i32 } %68, 1
  store i32 %70, ptr %5, align 4
  call void @_ZdlPvm(ptr noundef %17, i64 noundef 24) #8
  br label %75

71:                                               ; preds = %18
  %72 = landingpad { ptr, i32 }
          cleanup
  %73 = extractvalue { ptr, i32 } %72, 0
  store ptr %73, ptr %4, align 8
  %74 = extractvalue { ptr, i32 } %72, 1
  store i32 %74, ptr %5, align 4
  call void @_ZdlPvm(ptr noundef %35, i64 noundef 24) #8
  br label %75

75:                                               ; preds = %71, %67, %63, %59, %55
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #6
  call void @llvm.lifetime.end.p0(i64 1, ptr %2) #6
  br label %76

76:                                               ; preds = %75
  %77 = load ptr, ptr %4, align 8
  %78 = load i32, ptr %5, align 4
  %79 = insertvalue { ptr, i32 } poison, ptr %77, 0
  %80 = insertvalue { ptr, i32 } %79, i32 %78, 1
  resume { ptr, i32 } %80
}

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

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) unnamed_addr #3 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #4

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8Solution16zigzagLevelOrderEP8TreeNode(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8, ptr noundef nonnull align 1 dereferenceable(1), ptr noundef) #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIS_IiSaIiEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) 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) #1

attributes #0 = { mustprogress norecurse uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nobuiltin allocsize(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 = { nobuiltin nounwind "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 = { 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 #6 = { nounwind }
attributes #7 = { builtin allocsize(0) }
attributes #8 = { builtin 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, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 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.Solution = type { i8 }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %1 = alloca %class.Solution, align 1
  %2 = alloca %"class.std::vector", align 8
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %1) #6
  %3 = tail call noalias noundef nonnull dereferenceable(24) ptr @_Znwm(i64 noundef 24) #7
  tail call void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %3, i32 noundef 3)
  %4 = tail call noalias noundef nonnull dereferenceable(24) ptr @_Znwm(i64 noundef 24) #7
  tail call void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %4, i32 noundef 9)
  %5 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %4, ptr %5, align 8, !tbaa !5
  %6 = tail call noalias noundef nonnull dereferenceable(24) ptr @_Znwm(i64 noundef 24) #7
  tail call void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %6, i32 noundef 20)
  %7 = getelementptr inbounds i8, ptr %3, i64 16
  store ptr %6, ptr %7, align 8, !tbaa !11
  %8 = tail call noalias noundef nonnull dereferenceable(24) ptr @_Znwm(i64 noundef 24) #7
  tail call void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %8, i32 noundef 15)
  %9 = load ptr, ptr %7, align 8, !tbaa !11
  %10 = getelementptr inbounds i8, ptr %9, i64 8
  store ptr %8, ptr %10, align 8, !tbaa !5
  %11 = getelementptr inbounds i8, ptr %8, i64 8
  store ptr null, ptr %11, align 8, !tbaa !5
  %12 = load ptr, ptr %10, align 8, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %12, i64 16
  store ptr null, ptr %13, align 8, !tbaa !11
  %14 = tail call noalias noundef nonnull dereferenceable(24) ptr @_Znwm(i64 noundef 24) #7
  tail call void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %14, i32 noundef 7)
  %15 = load ptr, ptr %7, align 8, !tbaa !11
  %16 = getelementptr inbounds i8, ptr %15, i64 16
  store ptr %14, ptr %16, align 8, !tbaa !11
  %17 = load ptr, ptr %7, align 8, !tbaa !11
  %18 = getelementptr inbounds i8, ptr %17, i64 16
  %19 = load ptr, ptr %18, align 8, !tbaa !11
  %20 = getelementptr inbounds i8, ptr %19, i64 8
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %20, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %2) #6
  call void @_ZN8Solution16zigzagLevelOrderEP8TreeNode(ptr dead_on_unwind nonnull writable sret(%"class.std::vector") align 8 %2, ptr noundef nonnull align 1 dereferenceable(1) %1, ptr noundef nonnull %3)
  call void @_ZNSt6vectorIS_IiSaIiEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %2) #6
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %2) #6
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %1) #6
  ret i32 0
}

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

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN8TreeNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) unnamed_addr #3 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8Solution16zigzagLevelOrderEP8TreeNode(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8, ptr noundef nonnull align 1 dereferenceable(1), ptr noundef) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIS_IiSaIiEESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) 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) #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #5

attributes #0 = { mustprogress norecurse uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nobuiltin allocsize(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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #6 = { nounwind }
attributes #7 = { builtin allocsize(0) }

!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, !10, i64 8}
!6 = !{!"_ZTS8TreeNode", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 16}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,MemCpyOptPass,SROAPass,SimplifyCFGPass,TailCallElimPass