[Bug c/58409] wrong reordering of volatile writes

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58409

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Does:
  g_3[0][0][0].f1 = (**g_4).f1;

Fix the issue if so it is a dup of bug 47409 really.