[llvm-dev] [RFC] Lanai backend

[Jacques Pienaar via llvm-dev]

On Tue, Feb 9, 2016 at 10:05 AM, Chandler Carruth <chandlerc at google.com>
wrote:

> On Tue, Feb 9, 2016 at 9:58 AM Hal Finkel via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> ----- Original Message -----
>> > From: "Jacques Pienaar via llvm-dev" <llvm-dev at lists.llvm.org>
>> > To: llvm-dev at lists.llvm.org
>> > Sent: Tuesday, February 9, 2016 11:40:21 AM
>> > Subject: [llvm-dev] [RFC] Lanai backend
>>
>> > Hi all,
>>
>> Hi Jacques,
>>
>> > We would like to contribute a new backend for the Lanai processor
>>
>> I suppose I can guess from your e-mail address who "we" are?
>>
>
> Yep!
>
>
>>
>> > (derived from the processor described in [1]).
>> > Lanai is a simple in-order 32-bit processor with:
>>
>> Can you say a few words about what this is, in what hardware it appears,
>> and how it can be used? Is this the Myricom processor? What version(s)?
>
>
> This is internal hardware for us, so there's not a lot we can share, and
> you can't really grab a version of the hardware. If that's a problem for
> the community, I completely understand.
>
> Mostly, I wanted to offer to upstream this because it seems likely about
> the same utility as the AMDGPU backend for folks without an AMDGPU, or the
> XCore backend, etc. It's small, and we're happy maintaining it and taking
> on any of the effort around it. We're also happy with the usual policy of
> if the maintainers stop showing up, the backend goes away.
>
> But we're working on the backend a bunch, and it didn't make sense to keep
> it walled off. Especially if there is anything that can be reused in other
> backends and/or if there is any common infrastructure we need, this makes
> it easy to test.
>
> Still, totally up to the community if they want this. =]
>
> Aside from the Clang/LLVM support, what other software, drivers, etc.
>> would be needed to make use of this support? What versions of that software?
>>
>
> This is a question for Jacques, I'll let him fill in the details.
>

Aside from Clang/LLVM support the only other software we use are linker
support in binutils. We have not submitted those yet but it is based on the
previous binutils used (https://github.com/myri/lanai-binutils) but
targeting ELF instead of COFF.


>
> -Chandler
>
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