[llvm] [MachinePipeliner] Add validation for missed loop-carried memory deps (PR #145878)

[via llvm-commits]

aankit-ca wrote:

> @aankit-ca Could you please try your benchmark? I believe it works fine, but I'd like to make sure that there were no mistakes in splitting the original patch (#135148). Thanks in advance!

Thanks for the patch. I ran the numbers and I don't see any significant degradations!

https://github.com/llvm/llvm-project/pull/145878