http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51784
--- Comment #22 from Iain Sandoe <iains at gcc dot gnu.org> 2012-01-14 10:34:19 UTC --- I suppose that, for a start, if a function contains a non-local-label, then the pro/epilogue should save/restore all call-saved regs?
