http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44141
--- Comment #18 from Uros Bizjak <ubizjak at gmail dot com> 2012-05-08 10:32:33 UTC --- (In reply to comment #17) > Which makes this a target bug then. Uros? Following the explanation in comment #16, I'd say so. Please note that we already implement the radical change, mentioned at the end of the comment, but for TARGET_AVX only (please see *mov<mode>_internal patterns in config/i386/sse.md), and the less radical change with TARGET_SSE_PACKED_SINGLE_INSN_OPTIMAL in move patterns. As suggested, we will add T_S_P_S_I_O handling in movu patterns, avoiding mode changes entirely. Also, it looks that vector move patterns need some TLC.
