; LLVM IR from codemistic/Data-Structures-and-Algorithms :: CPP/graph_tree/LCA_Binary-tree.ll (Z7findLCAP4Nodeii)

; 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<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

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

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z8findPathP4NodeRSt6vectorIiSaIiEEi(ptr noundef, ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z7findLCAP4Nodeii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 personality ptr @__gxx_personality_v0 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca %"class.std::vector", align 8
  %9 = alloca %"class.std::vector", align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 24, ptr %8) #3
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %8) #3
  call void @llvm.lifetime.start.p0(i64 24, ptr %9) #3
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %9) #3
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = invoke noundef zeroext i1 @_Z8findPathP4NodeRSt6vectorIiSaIiEEi(ptr noundef %14, ptr noundef nonnull align 8 dereferenceable(24) %8, i32 noundef %15)
          to label %17 unwind label %24

17:                                               ; preds = %3
  br i1 %16, label %18, label %23

18:                                               ; preds = %17
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = load i32, ptr %7, align 4, !tbaa !9
  %21 = invoke noundef zeroext i1 @_Z8findPathP4NodeRSt6vectorIiSaIiEEi(ptr noundef %19, ptr noundef nonnull align 8 dereferenceable(24) %9, i32 noundef %20)
          to label %22 unwind label %24

22:                                               ; preds = %18
  br i1 %21, label %28, label %23

23:                                               ; preds = %22, %17
  store i32 -1, ptr %4, align 4
  store i32 1, ptr %12, align 4
  br label %62

24:                                               ; preds = %18, %3
  %25 = landingpad { ptr, i32 }
          cleanup
  %26 = extractvalue { ptr, i32 } %25, 0
  store ptr %26, ptr %10, align 8
  %27 = extractvalue { ptr, i32 } %25, 1
  store i32 %27, ptr %11, align 4
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %9) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %9) #3
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %8) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %8) #3
  br label %64

28:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #3
  store i32 0, ptr %13, align 4, !tbaa !9
  br label %29

29:                                               ; preds = %53, %28
  %30 = load i32, ptr %13, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %8) #3
  %33 = icmp ult i64 %31, %32
  br i1 %33, label %34, label %39

34:                                               ; preds = %29
  %35 = load i32, ptr %13, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %9) #3
  %38 = icmp ult i64 %36, %37
  br label %39

39:                                               ; preds = %34, %29
  %40 = phi i1 [ false, %29 ], [ %38, %34 ]
  br i1 %40, label %41, label %56

41:                                               ; preds = %39
  %42 = load i32, ptr %13, align 4, !tbaa !9
  %43 = sext i32 %42 to i64
  %44 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %8, i64 noundef %43) #3
  %45 = load i32, ptr %44, align 4, !tbaa !9
  %46 = load i32, ptr %13, align 4, !tbaa !9
  %47 = sext i32 %46 to i64
  %48 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %9, i64 noundef %47) #3
  %49 = load i32, ptr %48, align 4, !tbaa !9
  %50 = icmp ne i32 %45, %49
  br i1 %50, label %51, label %52

51:                                               ; preds = %41
  br label %56

52:                                               ; preds = %41
  br label %53

53:                                               ; preds = %52
  %54 = load i32, ptr %13, align 4, !tbaa !9
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %13, align 4, !tbaa !9
  br label %29, !llvm.loop !11

56:                                               ; preds = %51, %39
  %57 = load i32, ptr %13, align 4, !tbaa !9
  %58 = sub nsw i32 %57, 1
  %59 = sext i32 %58 to i64
  %60 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %8, i64 noundef %59) #3
  %61 = load i32, ptr %60, align 4, !tbaa !9
  store i32 %61, ptr %4, align 4
  store i32 1, ptr %12, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #3
  br label %62

62:                                               ; preds = %56, %23
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %9) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %9) #3
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %8) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %8) #3
  %63 = load i32, ptr %4, align 4
  ret i32 %63

64:                                               ; preds = %24
  %65 = load ptr, ptr %10, align 8
  %66 = load i32, ptr %11, align 4
  %67 = insertvalue { ptr, i32 } poison, ptr %65, 0
  %68 = insertvalue { ptr, i32 } %67, i32 %66, 1
  resume { ptr, i32 } %68
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

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

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

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z8findPathP4NodeRSt6vectorIiSaIiEEi(ptr noundef, ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z7findLCAP4Nodeii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %4 = alloca %"class.std::vector", align 8
  %5 = alloca %"class.std::vector", align 8
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %4) #3
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %5) #3
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  %6 = invoke noundef zeroext i1 @_Z8findPathP4NodeRSt6vectorIiSaIiEEi(ptr noundef %0, ptr noundef nonnull align 8 dereferenceable(24) %4, i32 noundef %1)
          to label %7 unwind label %12

7:                                                ; preds = %3
  br i1 %6, label %8, label %28

8:                                                ; preds = %7
  %9 = invoke noundef zeroext i1 @_Z8findPathP4NodeRSt6vectorIiSaIiEEi(ptr noundef %0, ptr noundef nonnull align 8 dereferenceable(24) %5, i32 noundef %2)
          to label %10 unwind label %12

10:                                               ; preds = %8
  br i1 %9, label %.preheader, label %28

.preheader:                                       ; preds = %10
  %11 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  %.not19 = icmp eq i64 %11, 0
  br i1 %.not19, label %.critedge, label %.lr.ph

12:                                               ; preds = %8, %3
  %13 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %5) #3
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %4) #3
  resume { ptr, i32 } %13

.lr.ph:                                           ; preds = %.preheader, %21
  %indvars.iv = phi i64 [ %indvars.iv.next, %21 ], [ 0, %.preheader ]
  %14 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  %15 = icmp ugt i64 %14, %indvars.iv
  br i1 %15, label %16, label %.critedge.loopexit

16:                                               ; preds = %.lr.ph
  %17 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %indvars.iv) #3
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %5, i64 noundef %indvars.iv) #3
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %.not = icmp eq i32 %18, %20
  br i1 %.not, label %21, label %.critedge.loopexit

21:                                               ; preds = %16
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %22 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  %23 = icmp ugt i64 %22, %indvars.iv.next
  br i1 %23, label %.lr.ph, label %.critedge.loopexit, !llvm.loop !9

.critedge.loopexit:                               ; preds = %21, %16, %.lr.ph
  %.0.lcssa.ph.in = phi i64 [ %indvars.iv, %.lr.ph ], [ %indvars.iv, %16 ], [ %indvars.iv.next, %21 ]
  %24 = shl i64 %.0.lcssa.ph.in, 32
  %sext = add i64 %24, -4294967296
  %25 = ashr exact i64 %sext, 32
  br label %.critedge

.critedge:                                        ; preds = %.critedge.loopexit, %.preheader
  %.0.lcssa = phi i64 [ -1, %.preheader ], [ %25, %.critedge.loopexit ]
  %26 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %.0.lcssa) #3
  %27 = load i32, ptr %26, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %7, %10, %.critedge
  %.012 = phi i32 [ %27, %.critedge ], [ -1, %10 ], [ -1, %7 ]
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %5) #3
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %4) #3
  ret i32 %.012
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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