> On Aug 8, 2019, at 12:25 PM, Vladimir Makarov <vmaka...@redhat.com> wrote:
>
>
> On 2019-08-04 3:18 p.m., John Darrington wrote:
>> I'm trying to write a back-end for an architecture (s12z - the ISA you can
>> download from [1]). This arch accepts indirect memory addresses. That is
>> to
>> say, those of the form (mem (mem (...))) and although my
>> TARGET_LEGITIMATE_ADDRESS
>> function returns true for such addresses, LRA insists on reloading them out
>> of
>> existence.
>> ...
> The old reload (reload[1].c) supports such addressing. As modern mainstream
> architectures have no this kind of addressing, it was not implemented in LRA.
Is LRA only intended for "modern mainstream architectures"?
If yes, why is the old reload being deprecated? You can't have it both ways.
Unless you want to obsolete all "not modern mainstream architectures" in GCC,
it doesn't make sense to get rid of core functionality used by those
architectures.
Indirect addressing is a key feature in size-optimized code.
paul
