https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79947
--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> --- The problem is the -mno-powerpc-gfxopt option disables floating point conditional moves, which is needed to use the floating point reciprocal estimate instructions. The macro TARGET_FRSQRTES did not have a check for GFXOPT.
