[llvm] [X86] Break false dependencies on Zen 4 and 5 (#206849) (PR #207079)

[via llvm-commits]

ganeshgit wrote:

> @ganeshgit what's outstanding here?

You wanted a better test. I suggested MIR tests. Waiting for your inputs there. I am okay with the source level changes. Only the tests need an update. 

https://github.com/llvm/llvm-project/pull/207079