On Fri, Nov 17, 2006 at 05:12:23PM +, Simon Peyton-Jones wrote:
> The crash is definitely a bug. The user manual does not claim to allow
> unboxed tuples in the return type for a foreign call; so GHC should reject
> the program politely.
>
> You might ask "well, couldn't the above program b
On Sat, Nov 18, 2006 at 04:46:24PM -0500, Peter Tanski wrote:
> The simple problem with Haskell and Integer is that, according to the
> Standard, Integer is a primitive: it is consequently implemented as
> part of the runtime system (RTS), not the Prelude or any library
> (though the interfac
Hello Donald,
Monday, November 27, 2006, 12:51:07 PM, you wrote:
> Does this thread on haskell-cafe, about getting better bit shifting
> results, indicate we should be tweaking the default unfolding-use
> threshold? Do the recent bit shifting/inlining patches improve things?
can you please look
GHC does a very simple form of CSE. If it sees
let x = e in e
it replaces the inner 'e' by x. But that's all at the moment.
Simon
| -Original Message-
| From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
| On Behalf Of Lennart Augustsson
| Sent: 27 November 2006 13:40
| To
Lennart Augustsson schrieb:
> GHC doesn't normally do CSE. CSE can cause space leaks, so you can't do
> it willy-nilly.
> I'm sure there are some strict contexts where it could be done safely,
> but I don't think ghc uses that information (yet).
Interestingly, it can only be switched off by -fno-
GHC doesn't normally do CSE. CSE can cause space leaks, so you can't
do it willy-nilly.
I'm sure there are some strict contexts where it could be done
safely, but I don't think ghc uses that information (yet).
-- Lennart
On Nov 27, 2006, at 08:34 , Christian Maeder wrote:
the foll
the following code does not run as fast as expected:
modexp a e n = if e <= 0 then 1 else
if even e
then mod (modexp a (div e 2) n * modexp a (div e 2) n) n
else mod (a * modexp a (e - 1) n) n
it gets only fast if written as:
modexp2 a e n = if e <= 0 then 1 else
if even e
then le
Hi Ian,
After some playing around and hacking of my code, I finally got it to
work. The problem is that the hscTarget flag needs to be set to HscNothing
when running in the JustTypeCheck mode:
GHC.setSessionDynFlags ses $ dflags1 {verbosity = 1, hscTarget=HscNothing}
If you change the above line
Does this thread on haskell-cafe, about getting better bit shifting
results, indicate we should be tweaking the default unfolding-use
threshold? Do the recent bit shifting/inlining patches improve things?
http://thread.gmane.org/gmane.comp.lang.haskell.cafe/16849/focus=16849
I'm thinking that
