ghci and unfoldings?
conal at conal.net
Mon Jan 18 06:45:24 UTC 2016
Thanks for the suggestion. That flag doesn't appear to help. Still no
On Sun, Jan 17, 2016 at 10:37 PM, Edward Z. Yang <ezyang at mit.edu> wrote:
> Does passing -fobject-code solve your problem?
> Excerpts from Conal Elliott's message of 2016-01-17 22:18:49 -0800:
> > Hi Brandon. Thanks for the reply. I’m not sure that it addresses what I
> > trying to ask. GHCi *does* invoke plugins and even reloads those plugins
> > dynamically when their source code changes. So in this sense ghci does
> > enable optimization, even if it doesn’t perform much optimization on its
> > own. And of course plugins and unfolding are not just about optimization.
> > I’m not looking for ghci to do optimization, but rather to enable me to
> > more easily develop my GHC plugins. It’s *almost* there already. I just
> > need access to unfoldings from other modules for my plugin’s use.
> > For context, I’m rebuilding my Haskell-to-hardware compiler
> > <https://github.com/conal/talk-2015-haskell-to-hardware>, which relies
> > giving a non-standard but principled interpretation of Haskell programs
> > a conversion through the language of cartesian closed categories (CCCs).
> > The first back-end is hardware generation (e.g., via Verilog), and I have
> > plans for several other CCC-based interpretations.
> > In addition to facilitating my plugin development, hosting in ghci will
> > make it much more pleasant for others to *use* the plugin during
> > exploratory programming, just as with ghci use in general. With access to
> > unfoldings, users will be able to generate circuit diagrams and Verilog
> > like those in my compiler talk immediately and directly from within
> ghci. I
> > also intend to make a GPU back-end for fast interactive graphics etc,
> > would be much more fun in ghci than with batch compilation.
> > I hope this explanation clarifies my goals and motivation. I hope
> there’s a
> > way to access unfoldings from ghci currently or with a small amount of
> > effort.
> > Regards, - Conal
> > On Sun, Jan 17, 2016 at 7:00 PM, Brandon Allbery <allbery.b at gmail.com>
> > wrote:
> > > On Sun, Jan 17, 2016 at 9:40 PM, Conal Elliott <conal at conal.net>
> > >
> > >> I'm developing a GHC plugin (using HERMIT), and I'd like to use ghci
> > >> speed up development. I'm able to do so, except that my plugin
> > >> needs access to unfoldings, which appear to be unavailable in ghci. A
> > >> little experimenting with ghc shows me that "-O" is the key, but "-O"
> > >> incompatible with "--interactive" (as in ghci). Is there any way to
> > >> persuade ghci to make unfoldings available?
> > >
> > >
> > > I think unfoldings are only done as part of optimization, and the
> > > backend doesn't support optimization at all.
> > >
> > > --
> > > brandon s allbery kf8nh sine nomine
> > > associates
> > > allbery.b at gmail.com
> > > ballbery at sinenomine.net
> > > unix, openafs, kerberos, infrastructure, xmonad
> > > http://sinenomine.net
> > >
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