<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/133345>133345</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [powerpc] Assertion failure using llvm-mc -show-encoding with plxv
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          efriedma-quic
      </td>
    </tr>
</table>

<pre>
    ```
$ echo "plxv 34, x" | llvm-mc -triple=powerpc64 -show-encoding
llvm-mc: [...]/llvm/lib/MC/MCAsmStreamer.cpp:2390: void (anonymous namespace)::MCAsmStreamer::AddEncodingComment(const llvm::MCInst &, const llvm::MCSubtargetInfo &): Assertion `Bit == 0 && "Encoder wrote into fixed up bit!"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
```
</pre>
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