[Bug tree-optimization/126138] `fp0 == fp1 || fp0 CMP fp1` can be combined always even with trapping

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126138

--- Comment #7 from Drea Pinski <pinskia at gcc dot gnu.org> ---
One more note; with these 2 patches I think we can also remove
spaceship_replacement but I have not tried.