<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/154963>154963</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Polish and improve builtins that produce template packs
        </td>
    </tr>

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

    <tr>
      <th>Assignees</th>
      <td>
            ilya-biryukov
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          ilya-biryukov
      </td>
    </tr>
</table>

<pre>
    #106730 has introduced `__builtin_dedup_pack` with a few limitations that will be addressed in the follow-up changes.
This is a meta-issue to track all those follow-ups.

</pre>
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