[llvm] Use F.hasOptSize() instead of checking optsize directly (PR #147348)

[Ellis Hoag via llvm-commits]

ellishg wrote:

> Seems like we need some more minsize tests? Are there optsize tests for these checks that could be duplicated to check minsize handling as well?

I can try to look into this.

https://github.com/llvm/llvm-project/pull/147348