<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/63634>63634</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            wrong code with clang-trunk, still worked with clang-16.0
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          m9710797
      </td>
    </tr>
</table>

<pre>
    I managed to reduce the testcase to:
https://godbolt.org/z/8T7h1Pb8M

As far as I can tell, there's no undefined behavior in this testcase.
Both clang-16 and gcc-13 produce the code that I was expecting.
But clang-trunk produces different (wrong?) x86 code.
</pre>
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