[LLVMdev] SLP vectorizer on AVX feature

[Frank Winter]

On 07/01/2015 04:29 PM, Renato Golin wrote:
> On 1 July 2015 at 21:22, Frank Winter <fwinter at jlab.org> wrote:
>> there were two follow-up emails.
> I only got one... weird...
>
>
>> The issue is solved. The SLP vectorizer has
>> a magic number built into the code which determines the max. vector length
>> to search for. That was set to 128 bits. Increasing it to 256 bits solved
>> the issue.
> That looks like a simple fix. Is it upstream yet? :)

That's not up to me. There were concerns raised about an increased 
compile time.
https://llvm.org/bugs/show_bug.cgi?id=17170#c8

Frank

>
>
>> For inconsistency reasons it must be '--debug-only=SLP' and the output can
>> be found in one of the follow-up emails.
> Of course. Maybe we should mean "vectorize" as all of them? Anyway,
> that's unrelated.
>
> cheers,
> --renato