https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106902
--- Comment #11 from Alexander Monakov <amonakov at gcc dot gnu.org> --- Can we move -ffp-contract=fast under the -ffast-math umbrella and default to -ffp-contract=on/off? Isn't it easy now to implement -ffp-contract=on by a GENERIC-only match.pd rule?