https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38077
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #3) > (In reply to Bernd Edlinger from comment #2) > > As of current 4.9 trunk, that may have changed a bit. > > but it still does not do what one would expect: > > That is a different issue ... That was fixed in GCC 5.1.0 (I have not looked into what fixed it though).