<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/106713>106713</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            `__noop` should return 0
        </td>
    </tr>

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

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

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

<pre>
    The new constexpr implementation is wrong.

https://github.com/llvm/llvm-project/blob/main/clang/test/CodeGen/builtin-ms-noop.cpp shows that `__noop` should return `0` and not nothing.
</pre>
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