[Bug middle-end/126912] Match vs compare simplifications

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126912

--- Comment #5 from Drea Pinski <pinskia at gcc dot gnu.org> ---
I think I have a better way of handling this. Just treat unknown operators for
results as a "C value name" in a similar way as type is handled. So it is a
little less award. Some parts of what I did can be reused. This still needs to
be a comparison and such.