<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/140262>140262</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            aarch64: -mcpu= passes -mcpu= instead of -march= to as with -no-integrated-as unlike GCC
        </td>
    </tr>

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

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

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

<pre>
    GCC was changed this behavior almost 10 years ago: https://gcc.gnu.org/pipermail/gcc-patches/2015-August/426507.html .

The reason is because GNU binutils and GCC are seperate projects so an older binutils can be used with a newer GCC without any issues. Plus it allows for GCC to use a different assembler besides GNU binutils which might not have that specific -mcpu option.

clang should do the same.

Right now `-no-integrated-as -mcpu=oryon-1` is broken when using with clang and GNU binutils' as because of this . `oryon-1` was not added to GNU binutils because it was not needed for when use with GCC; in fact there are other most other `-mcpu=` options have not been added to GNU binutils for this same reason.
</pre>
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