<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/61291>61291</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            SystemZ: 128-bit element-type vector arguments unsupported
        </td>
    </tr>

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

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

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

<pre>
    The SystemZ backend currently doesn't support passing vectors with 128-bit element types such as long double or __int128.  Verified with this snippet:

~~~
typedef long double sometype;

sometype get_elem(sometype __attribute__ ((vector_size (16))) v)
{
  return v[0];
}
~~~

When trying to compile, clang crashes with this message:

~~~
fatal error: error in backend: Unsupported vector argument or return type
PLEASE submit a bug report…
~~~

The same happens when defining `sometype` to `__int128` or when trying to return such a vector type instead of passing it as an argument.
</pre>
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