[llvm] [MachinePipeliner] Add validation for missed dependencies (PR #135148)

[Ryotaro Kasuga via llvm-commits]

https://github.com/kasuga-fj commented:

Hi @aankit-ca @iajbar . I've fixed the code and it no longer adds unnecessary dependencies in your case. Could you run the benchmark again? Thanks in advance. 

https://github.com/llvm/llvm-project/pull/135148