Optimize memcmp(x,y,n)==0 for small n and suitably aligned x/y.

http://reviews.llvm.org/D6952
PR20673

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246313 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed