Imporove load to store => memcpy

Summary: This now try to reorder instructions in order to help create the optimizable pattern.

Reviewers: craig.topper, spatel, dexonsmith, Prazek, chandlerc, joker.eph, majnemer

Differential Revision: http://reviews.llvm.org/D16523

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263503 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed