About commit TILE-Gx backend to community repository and default disabled

[Chandler Carruth]

On Fri, Mar 15, 2013 at 1:54 AM, Jiong Wang <jiwang at tilera.com> wrote:

> I agree that everyone should contribute to keep the community active and
> vigorious. But I think there are difference between contributors.
>
>    some are focused and with expertise on middle end, while others may on
> front or back end. so the normal way for a new contributor is, find a
> familiar point to start, then go deeper and wider and expand one's
> contribution during this process.
>
>    For Tilera corporation and me, we would like the keep tilegx backend
> actively maintained and improved, and wish it could be a good target to
> improve and test VLIW, many core features etc.
>

Inevitably, if you care about LLVM's support for your platform, you will
care about bugs and features in the target-independent stack of LLVM's
software (including the target independent parts of Clang, etc). There will
be bugs which are priorities only for you and/or your users, features most
pressing only for you or your users, etc. As such, it seems likely that you
will need at least a basic working familiarity with the stack, and the
ability to improve it in at least basic ways. Simple things like finding
and fixing bugs in the target independent code generator, improving DAG
combine optimizations, or looking for compile time hotspots are almost
always approachable by nearly anyone on the project.

Essentially, you don't need to invent a new middle end optimization, or
improve the subtleties of our alias analysis. Most of LLVM, and most of our
bugs/missing features/areas for improvement, involve straightforward C++
code and systems that anyone who cares can go in, hack, and improve. That's
what occupies the majority of the maintenance work as it happens. There is
relatively little deeply detailed work requiring specialized knowledge.
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