https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94461
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> --- So, I believe the r10-400-gecfdb16c54ad06ac23193e5de292fc71e5958526 change has been incorrect. We should revert those i386-builtin.def changes, and instead treat builtins with sole OPTION_MASK_ISA_MMX (and nothing else) as being enabled also if TARGET_MMX_WITH_SSE, not just with TARGET_MMX.
