http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52419
--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-29 13:52:05 UTC --- Failed to match this instruction: (set (reg:DI 62) (vec_select:DI (subreg:V2DI (unspec:V16QI [ (mem:V16QI (reg/v/f:DI 59 [ p ]) [0 *p_1(D)+0 S16 A8]) ] UNSPEC_MOVU) 0) (parallel [ (const_int 0 [0]) ]))) could at least be recognized.