[llvm-dev] Metadata in LLVM back-end

[Lorenzo Casalino via llvm-dev]

Le 04/11/20 à 17:40, David Greene a écrit :
> Sorry about the late reply.
>
> Lorenzo Casalino <lorenzo.casalino93 at gmail.com> writes:
>
>>>>> - Should not impact compile time excessively (what is "excessive?")
>>>> Probably, such estimation should be performed on
>>> Did something get cut off here?
>> Uops. Yep, I removed a paragraph, but, apparentely I forgot the first
>> period. In any case, we should discuss about how to quantitatively
>> determine an acceptable upper-bound on the overhead on the compilation
>> time and give a motivation for it. For instance, max n% overhead on the
>> compilation time must be guaranteed, because ** list of reasons **.
> I am not sure how we'd arrive at such a number or motivate/defend it.
> Do we have any sense of the impact of the existing metadata
> infrastructure?  If not I'm not sure we can do it for something
> completely new.  I think we can set a goal but we'd have to revise it as
> we gain experience.
I think it is the best approach to employ :)
>>> Since you initially raised the topic, do you want to take the lead in
>>> writing up a RFC?  I can certainly do it too but I want to give you
>>> right of first refusal.  :)
>>>                     -David
>> Uhm...actually, it wasn't me but Son Tuan, so the right of refusal
>> should be granted to him :) And I noticed now that he wasn't included in
>> CC of all our mails; I hope he was able to follow our discussion
>> anyways. I am adding him in this mail and let us wait if he has any
>> critical feature or point to discuss.
> Fair enough!  I have recently taken on a lot more work so unfortunately
> I can't devote a lot of time to this at the moment.  I've got to clear
> out my pipeline first.  I'd be very happy to help review text, etc.
Do not worry, it is ok ;) Meanwhile we wait for any feedback/input from Son,
I'll try to prepare a draft of RFC and publish it here.

Thank you David, and have a nice day :)

-- Lorenzo

>                  -David