Re: [PATCH] Add a late-combine pass [PR106594]

[Richard Sandiford <richard.sandiford@arm.com>]

Just a note that, following discussion on IRC, I'll pull this for
GCC 14 and resubmit for GCC 15.

There was also pushback on IRC about making the pass opt-in.
Enabling it for x86_64 would mean fixing RPAD to use a representation
that is more robust against recombination, but as you can imagine, it's
kind-of difficult for me to justify spending significant time fixing an
issue in the x86_64 port.  Jeff's testing suggested that there are also
latent issues in the older, less maintained ports.

So to get an idea for expectations: would it be a requirement that a
GCC 15 submission is enabled unconditionally and all known issues in
the ports fixed?

Thanks,
Richard