improve mayContainAlias (#31839)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/31839
There are a number of improvements that can be made to `mayContainAlias`, which I would like to do in follow ups. For now, this is an easy one.
Test Plan: Imported from OSS
Differential Revision: D19439516
Pulled By: eellison
fbshipit-source-id: 0042fb7eaae6cfb4916bf95dc38280517a4bd987
