[Bug rtl-optimization/85811] Invalid optimization with fmax, fabs and nan

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85811

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
    case MAX_EXPR:
      return RECURSE (op0) || RECURSE (op1);

This is not true if one is a NAN.