[Haskell-cafe] Strict Core?

Atze Dijkstra atze at cs.uu.nl
Sat Oct 16 13:21:37 EDT 2010


UHC indeed has an experimental typed core, which includes strict core (and is also based on GHC's core, and Henk). However, for UHC it is also quite a bit of engineering to make it produce typed/strict core for all language features, especially since it has to come from untyped core generation. So, there is currently a translation for a small set of language features, enough to do some experimenting, done by Tom Lokhorst. The current state is maintained and kept alive to allow further development in the future, e.g. both core structures internally have been put behind a class interface as to allow sharing of much of the generation infrastructure, but this all is still in transit and unfinished.

On  16 Oct, 2010, at 10:57 , Max Bolingbroke wrote:

> Hi Gregory,
> On 15 October 2010 22:27, Gregory Crosswhite <gcross at phys.washington.edu> wrote:
>> Out of curiosity, are there any plans for GHC to eventually use the Strict
>> Core language described in
>> http://www.cl.cam.ac.uk/~mb566/papers/tacc-hs09.pdf?
> I do not have plans to add it. I think it would be worth it - perhaps
> worth a few % points in runtime - but I've started researching
> supercompilation instead, which has more impressive effects :-)
> Simon has said he is keen to use it though - it's just a big
> engineering task to replumb GHC to use it, so perhaps this is a
> project for an enterprising student.
> That said, I've been told that UHC's core language uses the ideas from
> Strict Core, and they have/had a student at Utretch (Tom Lokhorst) who
> was working on implementing optimisations like arity raising and deep
> unboxing for the language.
> Cheers,
> Max
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                - Atze -

Atze Dijkstra, Department of Information and Computing Sciences. /|\
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