[Bug target/94248] [amdgcn] Doesn't build with RTL checking

[ams at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94248

--- Comment #5 from Andrew Stubbs <ams at gcc dot gnu.org> ---
(In reply to Thomas Schwinge from comment #4)
> (In reply to Andrew Stubbs from comment #3)
> > Actually, I think that recent changes to the register alignment mean that
> > this can't happen any more, so the whole check is probably obsolete.
> 
> I don't know exactly what "this" and "the whole check" relate to, but I do
> reconfirm that without Jakub's 'reg_overlap_mentioned_p' patch, I'm still
> running into the ICE.

I meant that I don't believe that overlapping registers can happen, thus the
condition will always be false.

Yes, the REG_P can still ICE with the additional checking enabled.