select: Add vector implementation

Passes CTS on Carrizo

Reviewed-by: Aaron Watry <awatry@gmail.com>
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 326819
GitOrigin-RevId: ae156b66f86dc07dc7c7e6b108d02c6ddaf14ddb
5 files changed