<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/143212>143212</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            missing optimization oppotunity?
        </td>
    </tr>

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

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

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

<pre>
    https://godbolt.org/z/z96hPzr1b

'len2' is 4 bytes aligned, one 'sw' should be used instead of 4 'sb'.
</pre>
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