Re: Question on SUBREG simplification for big endian target.

2024-07-29 Thread Jeff Law
On 7/29/24 2:13 PM, Richard Sandiford wrote: Sorry for the slow reply! Slow?!? I think I sent that Thu/Fri last week. Nothing to be sorry about at all in my mind! No, I agree it looks like a bug. Seems like: if (outermode == innermostmode && known_eq (byte, 0U)

Re: Question on SUBREG simplification for big endian target.

2024-07-29 Thread Richard Sandiford
Sorry for the slow reply! Jeff Law writes: > We don't really have a good place for discussions anymore other than > gcc-patches, but this really isn't a patch.. Oh well. > > > I'm debugging a failure of ext-dce on a big endian target (m68k) and I > can't help but think it's actually exposed a

Question on SUBREG simplification for big endian target.

2024-07-25 Thread Jeff Law
We don't really have a good place for discussions anymore other than gcc-patches, but this really isn't a patch.. Oh well. I'm debugging a failure of ext-dce on a big endian target (m68k) and I can't help but think it's actually exposed a latent bug in subreg handling. Your input would be a