http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46483
--- Comment #8 from Mikael Pettersson <mikpe at it dot uu.se> 2010-11-16 10:35:41 UTC --- The misaligned __builtin_memcpy was fixed for 4.6 by r163189, Richard Guenther's conservative alignment tracking (2nd try) patch: http://gcc.gnu.org/ml/gcc-patches/2010-08/msg00831.html http://gcc.gnu.org/ml/gcc-cvs/2010-08/msg00400.html