http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50693
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |missed-optimization Component|c |tree-optimization Summary|Slightly different loop |Slightly different loop |body leads to 5.5x slower |body leads not vectoring |performance |loop --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-10-10 22:53:50 UTC --- The loop is not vectorized in the second case for some reason.