<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/156322>156322</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Feature request: pattern match for rotl / rotr
        </td>
    </tr>

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

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

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

<pre>
    It would be nice if 

```c
#define ROTL(a,b) (((a) << (b)) | ((a) >> (32 - (b))))
```

could be translated to 
```c
__builtin_rotateleft(...)
```

emscripten (emcc, →`wasm2wat | grep -i rot`) did not do this automatically using Ubuntu 24.04 x86_64 neither Raspberry Pi OS (Debian bookworm).
</pre>
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