[MemorySSA & LoopPassManager] Add remaining book keeping [NFCI].

Add plumbing to get MemorySSA in the remaining loop passes.
Also update unit test to add the dependency.
[EnableMSSALoopDependency remains disabled].

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353901 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed