<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/64544>64544</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [libc++] std::rotl and std::rotr have the wrong signature
        </td>
    </tr>

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

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

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

<pre>
    https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0553r3.html
https://en.cppreference.com/w/cpp/numeric/rotl
https://en.cppreference.com/w/cpp/numeric/rotr

According to all documentation I see, the second argument to `std::rotl` and `std::rott` should be `int`, and defines the behavior when the argument is negative. However, `libc++` uses `unsigned int`:

https://github.com/llvm/llvm-project/blob/211c9752c8200fbb3ff7be1f6aa98037901758ce/libcxx/include/__bit/rotate.h#L37
https://github.com/llvm/llvm-project/blob/211c9752c8200fbb3ff7be1f6aa98037901758ce/libcxx/include/__bit/rotate.h#L45
</pre>
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