https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83964
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Seems any -O* level with -mcpu=power6 or -mcpu=power7 actually.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83964
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Seems any -O* level with -mcpu=power6 or -mcpu=power7 actually.