<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/58545>58545</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Build spits out lots of warnings with '-amxfp16' is not a recognized feature for this target (ignoring feature) on Haswell-EP
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          ms178
      </td>
    </tr>
</table>

<pre>
    Compiling llvm-git (b483349c5f4f), I've noticed a lot of these `'-amxfp16' is not a recognized feature for this target (ignoring feature)` warnings when building the compiler-rt and openmp runtime.

This is on a Haswell-EP CPU, with march=native set in my flags. This CPU doesn't support AMX, but it seems to me that it is set somewhere automatically albeit I did not specify it?! Or there is something wrong with the warning. 

After all it doesn't make sense to set that feature flag on Haswell-EP as the CPU is quite old and doesn't support it.
</pre>
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