[llvm] [CallPromotionUtil] See through function alias when devirtualizing a virtual call on an alloca. (PR #80736)

[Mingming Liu via llvm-commits]

minglotus-6 wrote:

> Suggest making the PR title shorter and moving some of the details there currently to the description. Also, I think this can be marked NFC?

Makes sense to make PR title shorter and move implementation details. It's not strictly an NFC (not stated in a simple way in prior title), rephrased the title.

https://github.com/llvm/llvm-project/pull/80736