http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
--- Comment #5 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-07-21 20:46:05 UTC --- In this case it would not reduce the size of the store, but how can this be seen? It cannot be seen from the insn/pattern alone. Do you have an idea how to attack this optimization flaw?
