<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/98930>98930</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            We know the layout of base classes and their subclasses that we can see the @implementation of
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          AtariDreams
      </td>
    </tr>
</table>

<pre>
    Only NSObject we can trust the layout of won't change even though we cannot directly see its @implementation

_Originally posted by @AtariDreams in https://github.com/llvm/llvm-project/pull/85465_
</pre>
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