http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46590
--- Comment #29 from stevenb.gcc at gmail dot com <stevenb.gcc at gmail dot com> 2012-08-22 17:33:00 UTC --- > I thought that loop header copying wouldn't need to insert new PHI nodes > and thus can do with TODO_update_ssa_no_phi if we are in loop-closed SSA form, > but appearantly that is not the case (I didn't inverstigate further here, > but possibly that's just because virtual operands are not in loop-closed > SSA form). I'll experiment with VOPs in LC-SSA.
