Optimize x86 vector shift by constant.

BUG=swiftshader:15

Change-Id: I4b7b97f3de18c201a502d0bc38a2c845a1caf278
Reviewed-on: https://chromium-review.googlesource.com/392627
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Jim Stichnoth <stichnot@chromium.org>
1 file changed