llvm dev - Nov 2016 - X86 backend code ownership

Hi, 

I'd like to continue the discussion on the X86 backend ownership that
started here [1].  I think that Craig Topper would be a great code owner.
Several people replied to the email with +1s. Quentin had some concerns.
Let's continue the discussion.

-Nadav



[1] - http://lists.llvm.org/pipermail/llvm-dev/2016-November/106931.html.
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Copy/pasting my concerns here to ease the reading:
Craig is indeed one of the main contributor of the X86 backend (in terms of
commits). My concern though is that Craig’s focus is on the assembly (TableGen
classes clean-up and such) and not so much on CodeGen (ISel and various
X86-specific passes) as far as I can tell.
> On Nov 9, 2016, at 5:11 PM, Nadav Rotem via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> Hi, 
> 
> I'd like to continue the discussion on the X86 backend ownership that
started here [1].  I think that Craig Topper would be a great code owner.
Several people replied to the email with +1s. Quentin had some concerns.
Let's continue the discussion.
> 
> -Nadav
> 
> 
> 
> [1] - http://lists.llvm.org/pipermail/llvm-dev/2016-November/106931.html.
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

Thanks for the support Nadav, Zvi, Chandler, Renato, and anyone else I
missed.

Quetin, to maybe address your concerns. My focus lately has been fixing
inconsistency in instruction selection behavior between the older AVX
instruction encodings and the new AVX512 encodings. I've also been trying
to fix cases where concepts haven't been extended to wider vectors yet. For
instance, the instcombine handling of x86 shift intrinsics. I've also been
trying to remove AVX512 intrinsics for things that can be represented with
native IR or where we can use a legacy instrinsic and only need a masking
IR select instruction to support AVX512.

~Craig

On Wed, Nov 9, 2016 at 5:38 PM, Quentin Colombet via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Copy/pasting my concerns here to ease the reading:
> Craig is indeed one of the main contributor of the X86 backend (in terms
> of commits). My concern though is that Craig’s focus is on the assembly
> (TableGen classes clean-up and such) and not so much on CodeGen (ISel and
> various X86-specific passes) as far as I can tell.
>
> > On Nov 9, 2016, at 5:11 PM, Nadav Rotem via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
> >
> > Hi,
> >
> > I'd like to continue the discussion on the X86 backend ownership
that
> started here [1].  I think that Craig Topper would be a great code owner.
> Several people replied to the email with +1s. Quentin had some concerns.
> Let's continue the discussion.
> >
> > -Nadav
> >
> >
> >
> > [1] -
http://lists.llvm.org/pipermail/llvm-dev/2016-November/106931.html
> .
> > _______________________________________________
> > LLVM Developers mailing list
> > llvm-dev at lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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