This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: Saga of m68k PIC continues
>
> >> Note the removal of the (const ... ) in insn 11.
> >>
> >> Any ideas where this is being stripped off?
> >
> >GCC will happily put in the subreg when your machine description accept
> >it.
>
> I don't see how subregs take care of -fPIC and (unspec ...). Could
> you explain?
Oops, I meant symbol_ref, of course...
>
> >There are hooks defining valid addresses and constants and these
> >must refuse invalid stuff, like (symbol_ref:SI ("foo") is for PIC.
>
> Do you mean that GO_IF_LEGITIMATE_ADDRESS needs to reject a raw
> (symbol_ref:SI ("foo")) if in pic mode, which would then force the
> addr to be pushed through LEGITIMIZE_ADDRESS(I think) where it would
> spot the raw symbol_ref in pic mode and by wrap it in a (const
> (uspec:SI [...] 3))?
Yes, and additionally you need LEGITIMATE_PIC_OPERAND_P to reject
symbol_ref as immediate operands.
Honza
>
> --
> Peter Barada Peter.Barada@motorola.com
> Wizard 781-852-2768 (direct)
> WaveMark Solutions(wholly owned by Motorola) 781-270-0193 (fax)