[llvm] [InstCombine] Do not simplify lshr/shl arg if it is part of fshl rotate pattern. (PR #73441)

[via llvm-commits]

quic-eikansh wrote:

> I would expect to see test difference in the commit adding the new restriction.

I didn't get what you meant by this. Should I have code changes and test in the same commit?

https://github.com/llvm/llvm-project/pull/73441