[llvm-dev] Open Project : Inter-procedural Register Allocation [GSoC 2016]

[Matthias Braun via llvm-dev]

No need to apologize this thread surely deserved some answers :)

From my perspective this project sounds doable. I would expect the register allocation parts to be not too hard: I imagine this being just distilling a new clobber regmask after allocating a function. I would expect the challenging (or annoying) part to get a machine module pass (or a similar mechanism to influence the order in which functions are processed) and a callgraph in the backend. So this might end up being more pass manager / infrastructure work than register allocation.

I'd be happy to answer detail questions or give guidance on the register allocation aspects.

- Matthias

> On Mar 22, 2016, at 5:27 PM, Sanjoy Das <sanjoy at playingwithpointers.com> wrote:
> 
> Apologies: didn't notice how old this thread is before replying.
> 
> On Tue, Mar 22, 2016 at 5:24 PM, Sanjoy Das
> <sanjoy at playingwithpointers.com> wrote:
>> Hi Vivek,
>> 
>> [+CC Matthias, Quentin]
>> 
>> Inter-procedural register allocation can be a big win, but my estimate
>> is that it will be challenging to complete within one summer unless
>> you're already familiar with LLVM's register allocator.
>> 
>> I've CC'ed some people who can give you some more detailed information.
>> 
>> -- Sanjoy
>> 
>> 
>> On Tue, Feb 9, 2016 at 9:17 PM, vivek pandya via llvm-dev
>> <llvm-dev at lists.llvm.org> wrote:
>>> Hello Community,
>>> 
>>> I would like to know status of the project and also importance of it. If the
>>> project is still open I would like to work on GSoC 2016 proposal for
>>> Inter-procedural Register Allocation, in that case please also suggest
>>> possible mentor or let me know if anyone is willing to be mentor for this.
>>> 
>>> Sincerely,
>>> Vivek Pandya
>>> 
>>> 
>>> _______________________________________________
>>> LLVM Developers mailing list
>>> llvm-dev at lists.llvm.org
>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>> 
>> 
>> 
>> 
>> --
>> Sanjoy Das
>> http://playingwithpointers.com
> 
> 
> 
> -- 
> Sanjoy Das
> http://playingwithpointers.com