https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86819
--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> --- There are 2 independent things. TARGET_MIN_DIVISIONS_FOR_RECIP_MUL controls replacing several divisions with the same divisor (a/x, b/x, c/x) with one division (y=1/x) and several multiplications (a*y, b*y, c*y). And indeed, starting from 3 divisions, I see this happening on x86, but I'd like it to start at 2. -mrecip controls replacing a single division (divss) with a multiplication by RCPSS + Newton-Raphson, that is it controls how division is implemented.
