Revert "MemCpyOpt: combine local load/store sequences into memcpy."

This reverts commit r269125. It was in my tree when I ran "git svn dcommit".
It's really still under review.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@269127 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed