[llvm] [AbstractCallSite] Handle Indirect Calls Properly (PR #163003)

[Kunqiu Chen via llvm-commits]

Camsyn wrote:

> Kindly rewrite the PR description in your own words.

Sorry, I originally used an LLM to polish the PR description, thinking it would make the text more structured and easier to read.
It seems that was not the right approach. I’ve now rewritten the description entirely in my own words.

https://github.com/llvm/llvm-project/pull/163003