<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=http://email.email.llvm.org/c/eJylUctu5CAQ_Bp8QbEAGz8OHLKZzH9g6PEQMcai8WaSr0_bm-xGq72tBKKhiqKampJ_M0wNMfqJqZGvTJ3vnKk2DxMTJyYeIeeUWfPI4b5mQAxp4RcbInheEl9tRiD0Ly5rnjaE_P2OYM0zQfJzcsJ5uvBt8eCizSQXPCwlXALdY6r_9EDFIf3dEtPPX4f_Mv76G9wWDPNC0nhNuew0Ighyd-LiLoTwv5iVN40fm9FWdivENMstIdmothzNtZQV9w7VmcYcynWbapdutInx59fysOb0Ao7eOAfEDZAK3ahGVFfjbN9D31rZgdZqHN0gnZbjBH0vB-HaKtoJIhqmfzClFnjlhwTVTJ-q_3cQjBJKCSk7qWUrxtrqzsnO9xfRO-fExFoBN4q03nXqlOcqm0Ny2mYkMAYs-Ae0ePwqHIbJYQklgtmD4D4BLpRZ4RlcmpfwDvw-dA9dS4fI996mtwKEzqQJGSmQ4Yj5idd1vS9Z6j3Q6mjCHB18AIsLziA>53230</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            lldb doesn't recognize x86-64's new byte registers (r8b, ..., r15b)
        </td>
    </tr>

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

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

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

<pre>
    (lldb) p/x $r8b
error: expression failed to parse:
error: <user expression 0>:1:1: use of undeclared identifier '$r8b'
$r8b
^
(lldb) p/x $r8w
(unsigned short) $0 = 0x000d

</pre>
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