Article View: comp.lang.misc
Article #1656Re: How to make a language downward-extensible?
From: David Keppel
Date: Sat, 06 Oct 1990 22:25
Date: Sat, 06 Oct 1990 22:25
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1785 bytes
>stephen@estragon.uchicago.edu (Stephen P Spackman) writes:
>>We already trust the compiler to do much of our optimisation. Making
>>that compiler smarter, possibly interactively, is what we want to do
>>next.
In article <2873@igloo.scum.com> nevin@igloo.UUCP (Nevin Liber) writes:
>[But does the person really know the ideal mapping to each machine?]
I think the goal is that the compiler discovers ``Boy, I could move
this common subexpression out of the loop if I only knew that it wasn't
an alias for this thing over here'' and then queries the user to see
if that is indeed the case (presumably the user says ``yes'' or ``no''
in a way that the compiler won't ask again next time).
>[But won't that slow compilation?]
Only the phase with optimization turned on, and only when you have it
in ``query'' mode.
>[Interactive might be 5-10 times slower -- any real results?]
How fast can you type a response ?-)
;-D on ( Amortize compiler costs? Nah, depreciate! ) Pardo
--
pardo@cs.washington.edu
{rutgers,cornell,ucsd,ubc-cs,tektronix}!uw-beaver!june!pardo
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<1990Sep24.160705.21113@newcastle.ac.uk> <9363:Sep2521:41:1290@kramden.acf.nyu.edu> <7935@scolex.sco.COM> <29047:Sep2816:51:129 <STEPHEN.90Sep30235402@estragon.uchicago.edu> <2873@igloo.scum.com>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!uunet!snorkelwacker!mit-eddie!uw-beaver!uw-june!pardo From: pardo@cs.washington.edu (David Keppel) Newsgroups: comp.lang.misc Subject: Re: How to make a language downward-extensible? Message-ID: <13274@june.cs.washington.edu> Date: 6 Oct 90 22:25:34 GMT References: <1990Sep24.160705.21113@newcastle.ac.uk> <9363:Sep2521:41:1290@kramden.acf.nyu.edu> <7935@scolex.sco.COM> <29047:Sep2816:51:129 <STEPHEN.90Sep30235402@estragon.uchicago.edu> <2873@igloo.scum.com> Reply-To: pardo@june.cs.washington.edu (David Keppel) Organization: University of Washington, Computer Science, Seattle Lines: 30