http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50088
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-08-15 13:07:50 UTC --- I don't think we know at this point that the data is already properly zero-extended.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50088
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-08-15 13:07:50 UTC --- I don't think we know at this point that the data is already properly zero-extended.