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

[vivek pandya via llvm-dev]

*Vivek Pandya*


On Wed, Mar 23, 2016 at 6:34 AM, Matthias Braun <mbraun at apple.com> wrote:

> 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.
>
> Actually  I have a draft proposal for Add machine Module pass ( which is
not a very concrete approach )
https://docs.google.com/document/d/17ROHuyj0Tyg2SXEMoutpAedEXXuGxj8-zgTuHBRp4HY/edit?usp=sharing
I was thinking to implement a simple Interprocedural Register Allocator as
an example that uses this work.But that may be too much of work to complete
in the summer.

- 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
>
>
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