<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/54214>54214</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            OpenMP custom state machine optimization fails with a single thread
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          jhuber6
      </td>
    </tr>
</table>

<pre>
    The custom state machine had a check for surplus threads that filtered the main thread if the kernel was executed by a single warp only. This prevented us from executing the region if only a single thread was present. Normally a parallel region with one thread had its state machine removed, but this occurs when there is no parallelism in an external call.
</pre>
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