Re: [Haskell-cafe] haskell on llvm?

2007-09-14 Thread Ryan Dickie
I could see it as a useful abstraction instead of directly generating
assembly. To me the idea behind llvm seems nice and clean and academic to a
certain degree. It can see it as something to look out for in the future.

On 9/13/07, brad clawsie <[EMAIL PROTECTED]> wrote:
>
> has anyone ever considered using llvm as a infrastructure for haskell
> compilation? it wold seem people are looking at building frontends for
> scheme, ocaml, etc. i don't know if an alternate backend is
> appropriate, but it would seem to be an interesting way to aggregate
> the best thinking for various optimizations over a more diverse group
> of developers.
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Re: [Haskell-cafe] haskell on llvm?

2007-09-13 Thread Thomas Schilling
On Thu, 2007-09-13 at 15:58 -0700, Don Stewart wrote:
> clawsie:
> > has anyone ever considered using llvm as a infrastructure for haskell
> > compilation? it wold seem people are looking at building frontends for
> > scheme, ocaml, etc. i don't know if an alternate backend is
> > appropriate, but it would seem to be an interesting way to aggregate
> > the best thinking for various optimizations over a more diverse group
> > of developers.
> 
> People are definitely interested in it. Needs some people with compiler
> experience and GHC experience to tackle it seriously, I suspect.

Reading and writing llvm files could also be useful to
prototype/implement compiler passes using Haskell.

/ Thomas

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Re: [Haskell-cafe] haskell on llvm?

2007-09-13 Thread Thomas Schilling
On Thu, 2007-09-13 at 15:55 -0700, brad clawsie wrote:
> has anyone ever considered using llvm as a infrastructure for haskell
> compilation? it wold seem people are looking at building frontends for
> scheme, ocaml, etc. i don't know if an alternate backend is
> appropriate, but it would seem to be an interesting way to aggregate
> the best thinking for various optimizations over a more diverse group
> of developers.

I applied for Google Summer of Code with the suggestion to write a
library to generate (and compile) LLVM code (not my idea in the first
place, but I liked it), but it didn't get into the top 9 (i.e., funded)
projects.  It's certainly not a bad idea, but the immediate use to the
community would admittedly not be too great.  Targeting an existing
Haskell compiler would probably be doable, but I am unsure what the big
advantages would be.  Many optimizations implemented for llvm are more
high-level in nature and wouldn't make much sense for Haskell compilers,
since translating to llvm would lose some information, and Haskell,
being a lazy language, requires/enables non-standard transformations.
Haskell-compilers currently require better low-level optimizations
(instruction scheduling, register allocation, maybe memory locality
optimazitions).  I'm not up to date with how well llvm scores in these
areas, but last time I checked it was slower than ghc, and ghc already
isn't too great at this kind of stuff (compared to icc).

I could however see some applications of an llvm-generation library for
DSLs that require high performance, and currently have to invoke gcc at
runtime.

/ Thomas

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Re: [Haskell-cafe] haskell on llvm?

2007-09-13 Thread Don Stewart
clawsie:
> has anyone ever considered using llvm as a infrastructure for haskell
> compilation? it wold seem people are looking at building frontends for
> scheme, ocaml, etc. i don't know if an alternate backend is
> appropriate, but it would seem to be an interesting way to aggregate
> the best thinking for various optimizations over a more diverse group
> of developers.

People are definitely interested in it. Needs some people with compiler
experience and GHC experience to tackle it seriously, I suspect.

-- Don
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[Haskell-cafe] haskell on llvm?

2007-09-13 Thread brad clawsie
has anyone ever considered using llvm as a infrastructure for haskell
compilation? it wold seem people are looking at building frontends for
scheme, ocaml, etc. i don't know if an alternate backend is
appropriate, but it would seem to be an interesting way to aggregate
the best thinking for various optimizations over a more diverse group
of developers.
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