https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79460
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Shouldn't it (both in the vectorizer and in scev) be dependent not just on flag_fp_contract_mode but also on some -ffast-math subflag? Doing several additions can e.g. raise different exceptions and have different roundings from doing it as just one multiply.
