http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53101
Richard Guenther <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |missed-optimization Status|UNCONFIRMED |NEW Last reconfirmed| |2012-04-24 Ever Confirmed|0 |1 --- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-04-24 11:13:33 UTC --- We get MEM[(T * {ref-all})&x] for the casting (not a BIT_FIELD_REF for example). This gets expanded to (insn 6 5 7 (set (reg:OI 63) (subreg:OI (reg/v:V4DF 61 [ x ]) 0)) t.c:8 -1 (nil)) (insn 7 6 8 (set (reg:V2DF 60 [ <retval> ]) (subreg:V2DF (reg:OI 63) 0)) t.c:8 -1 (nil)) but that should be perfectly optimizable.