http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50905
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |INVALID --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-10-28 20:07:03 UTC --- Yes if you mean without -O1/-O2/-O3 -ftree-parallelize-loops does not work, this is expected as explained in the manual, -O1 enables more than the options that includes adding more optimizations.