Fix for a regression caused by the LoopVectorizer when

vectorizing loops with memory accesses to non-zero address spaces. It
simply dropped the AS info. Fixes PR16306.


Merged from r184103
Author: Pekka Jaaskelainen <pekka.jaaskelainen@tut.fi>
Date:   Mon Jun 17 18:49:06 2013 +0000

llvm-svn: 185869