http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55953
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target| |x86_64-*-* Component|c |target --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2013-01-11 23:35:53 UTC --- This is a target issue. The first function uses the AVX/SSE registers while the second only uses the integer registers. So the target decides not to vectorize memset but only use the integer registers.