[Bug target/103316] PowerPC: Gimple folding of int128 comparisons produces suboptimal code

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103316

--- Comment #13 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Bill Schmidt from comment #11)
> As I mentioned privately, we could do with an audit of our implementation of
> standard patterns in general, since  we tend to find such missing cases more
> often than I'd like...

It would be great if there was some standard way of seeing what targets
implement (and do not implement!) what.  It will be hugely useful when
implementing a new port for example, but also great when maintaining one.