https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126465
--- Comment #4 from ktkachov at gcc dot gnu.org --- (In reply to Drea Pinski from comment #1) > r16-6508-g772b847d99d5e3 . > > > (simplify > (negate (fmas@3 @4 @0 @1 @2 @5)) > (if (!HONOR_SIGN_DEPENDENT_ROUNDING (type) && single_use (@3)) > (IFN_COND_FNMS @4 @0 @1 @2 @5)))) > > > The negate also applies to the other non-fma part while afterwards it does > not. > > (simplify > (negate (IFN_FMS@3 @4 @0 @1 @2 @5)) > (if (!HONOR_SIGN_DEPENDENT_ROUNDING (type) && single_use (@3)) > (IFN_COND_FNMA @4 @0 @1 @2 @5))) > More worryingly, why is IFN_FMS taking 4 here when it is a ternary IFN and how come genmatch didn't catch it?
