<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/86423>86423</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Merge 755b439694432d4f68e20e979b479cbc30602bb1 into 18.1.x
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          brad0
      </td>
    </tr>
</table>

<pre>
    [Mips] Fix missing sign extension in expansion of sub-word
 atomic max (#77072)

Add sign extension "SEB/SEH" before compare.

Fix #61881
</pre>
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