[MCA][LSUnit] Return the ID of the dependent memory operation from method
isReady(). NFCI

This is yet another change in preparation for a fix for PR37494.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354150 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed