<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/63439>63439</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            x86 failure with implicit vector use of mulhi
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          g0blue
      </td>
    </tr>
</table>

<pre>
    It seems the InstructionCombining pass will sometimes attempt to use vpmulhuw but that causes a crash in LegalizeVectorTypes.cpp.

See https://www.godbolt.org/z/WKa6xh1r1


</pre>
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