<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/154555>154555</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [Headers][X86] Allow FMA3/FMA4 intrinsics to be used in constexpr
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            backend:X86,
            clang:headers,
            constexpr
      </td>
    </tr>

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

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

<pre>
    Now that #152455 is done, we can make the vector fma intrinsics constexpr

The scalar and addsub/subadd intrinsics will have to wait.
</pre>
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