<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/63080>63080</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            `__builtin_memmove` isn't checked by UBSan
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            compiler-rt:ubsan
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          philnik777
      </td>
    </tr>
</table>

<pre>
    When passing `nullptr`s to `std::memmove`, UBSan complains. When using `__builtin_memmove` instead, UBSan is happy with it, even though it is still UB (AFAICT).
</pre>
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