<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/61010>61010</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Mismatch with MSVC name mangling handling when dealing with the address of a union member as an auto template argument
        </td>
    </tr>

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

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

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

<pre>
    When using clang under an msvc target, it uses the same mangled name for the address of different members of a union.

The expected (matching MSVC) behavior is that the type of the member should add onto the mangled name, thereby avoiding a name mangling clash. A minimal repro of this issue can be found here: https://godbolt.org/z/hE5dsT4oE

Additionally, it would appear even when the type is the same, and such there is a name mangling clash, MSVC is able to reconcile the issue by merging the calls into the same mangled function. This I suppose is not as important as the former (the chances of this are unlikely to affect programs in practice), but still a mismatch with MSVC behavior. A minimal repro of this issue can be found here: https://godbolt.org/z/dTcxj8Pnc
</pre>
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