[aarch64-port-dev ] RFR(L): 8231441: AArch64: Initial SVE backend support

Andrew Dinn adinn at redhat.com
Mon Aug 17 10:29:11 UTC 2020

On 17/08/2020 11:19, Ningsheng Jian wrote:
>>> As Joshua clarified, we are also working on predicate scalable reg,
>>> which is not in this patch. Thanks for the suggestion, I will try to
>>> refactor this a bit.
>> Ok, I'll wait for an updated patch. Are you planning to include the
>> scalable predicate reg code as part of this patch? I think that would be
>> better as it would help to clarify the need to distinguish vector regs
>> as a subset of scalable regs.
> My original plan was not to include scalable predicate reg related code,
> as they are not used and tested without proper mid-end/back-end code. Do
> you think just adding some comments is OK for now, e.g. saying that a
> scalable reg could also be a predicate reg in future?

Sure. A comment describing the meaning of the scalable and vector
properties and their independence from each other will be good enough
for now and it will still be helpful once the extra code is added.


Andrew Dinn
Red Hat Distinguished Engineer
Red Hat UK Ltd
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