From: Mark Mitchell <mark@codesourcery.com>
To: fjh@cs.mu.oz.au
Cc: gcc@gcc.gnu.org
Subject: Re: forcing tail/sibling call optimization
Date: Wed, 29 Nov 2000 02:09:00 -0000 [thread overview]
Message-ID: <20001129020943B.mitchell@codesourcery.com> (raw)
In-Reply-To: <20001129142052.A18130@hg.cs.mu.oz.au>
Fergus --
You're definitely right -- the transformation you have to do to make
the code safe for tailcalls from the point of view of the C compiler
are more severe than I thought. Addressing parameters is particularly
deadly. On the other hand, as you say, we're talking about
machine-generated code anyhow -- so ugliness probably doesn't matter
as much as speed and correctness.
I think we're going to have to agree to disagree here. It's still
my position that we shouldn't introduce an extension for the tail-call
stuff, because I don't view the translation of functional languages
into C as fundamentally the right way to go. It would be so much
better to write a Scheme front-end for GCC -- and I would totally
support, then, providing a bit on CALL_EXPRs to force tailcalls.
Presumably, the Scheme front-end would set this bit.
I know that you, and Mike Stump, disagree with me -- and that's
cool. We'll see what happens from here.
--
Mark Mitchell mark@codesourcery.com
CodeSourcery, LLC http://www.codesourcery.com
next prev parent reply other threads:[~2000-11-29 2:09 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-11-26 8:14 Robert Dewar
2000-11-26 13:43 ` Fergus Henderson
2000-11-27 7:58 ` Jeffrey A Law
2000-11-27 8:05 ` David Edelsohn
2000-11-27 8:07 ` Andi Kleen
2000-11-27 8:25 ` Jeffrey A Law
2000-11-27 8:39 ` Andi Kleen
2000-11-27 9:48 ` Jeffrey A Law
2000-11-27 11:21 ` Lars Brinkhoff
2000-11-27 10:54 ` Mark Mitchell
2000-11-27 8:38 ` Bernd Schmidt
2000-11-27 11:26 ` Eric W. Biederman
2000-11-27 10:48 ` Mark Mitchell
2000-11-27 12:46 ` Harvey J. Stein
2000-11-27 13:02 ` Travis Moulton
2000-11-27 10:47 ` Mark Mitchell
2000-11-28 19:21 ` Fergus Henderson
2000-11-29 2:09 ` Mark Mitchell [this message]
2000-11-30 23:59 ` Fergus Henderson
2000-12-01 15:51 ` Joe Buck
2001-01-03 12:24 ` Fergus Henderson
2001-01-03 13:09 ` Richard Henderson
2001-01-03 14:59 ` Fergus Henderson
2001-01-03 15:32 ` Richard Henderson
2001-01-03 15:53 ` Fergus Henderson
2001-01-03 16:11 ` Richard Henderson
2001-01-03 16:36 ` Fergus Henderson
2002-09-14 23:35 ` Fergus Henderson
2002-09-16 9:26 ` Richard Henderson
2000-11-27 23:39 ` Fergus Henderson
-- strict thread matches above, loose matches on Subject: below --
2000-11-29 4:58 Robert Dewar
2000-11-27 15:33 Mike Stump
2000-11-27 10:04 Robert Dewar
2000-11-27 9:39 Geert Bosch
2000-11-27 12:06 ` Jeffrey A Law
2000-11-27 9:08 Robert Dewar
2000-11-27 9:14 ` Bernd Schmidt
2000-11-27 10:09 ` Michael Matz
2000-11-27 8:44 Robert Dewar
2000-11-27 9:44 ` Jeffrey A Law
2000-11-27 10:22 ` Mark Probst
2000-11-27 14:42 ` Harvey J. Stein
2000-11-27 16:07 ` Mark Probst
2000-11-27 14:30 ` Harvey J. Stein
2000-11-26 18:09 Robert Dewar
2000-11-26 15:46 Robert Dewar
2000-11-26 16:21 ` Joseph S. Myers
2000-11-26 18:08 ` Fergus Henderson
2000-11-26 21:50 ` Jeffrey A Law
2000-11-26 15:27 Robert Dewar
2000-11-26 17:56 ` Fergus Henderson
2000-11-26 10:59 Timothy J. Wood
2000-11-26 9:12 Geert Bosch
2000-11-26 8:21 Robert Dewar
2000-11-26 13:51 ` Fergus Henderson
2000-11-26 5:00 Robert Dewar
2000-11-26 7:44 ` Fergus Henderson
2000-11-26 8:18 ` Bernd Schmidt
2000-11-26 9:55 ` Andi Kleen
2000-11-26 11:34 ` Per Bothner
2000-11-26 11:55 ` Mark Probst
2000-11-26 17:40 ` Fergus Henderson
2000-11-26 3:56 Fergus Henderson
2000-11-26 5:22 ` Mark Probst
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