From: Gabriel Dos Reis <gdr@cs.tamu.edu>
To: Stan Shebs <shebs@apple.com>
Cc: "Joseph S. Myers" <jsm@polyomino.org.uk>,
Ziemowit Laski <zlaski@apple.com>,
gcc-patches@gcc.gnu.org
Subject: Re: New C parser [patch]
Date: Tue, 26 Oct 2004 01:46:00 -0000 [thread overview]
Message-ID: <m3zn2ae0cx.fsf@merlin.cs.tamu.edu> (raw)
In-Reply-To: <417D91EB.2080504@apple.com>
Stan Shebs <shebs@apple.com> writes:
| Joseph S. Myers wrote:
|
| >On Mon, 25 Oct 2004, Ziemowit Laski wrote:
| >
| >
| >>I'm just curious as to why you think that writing a C parser from scratch is
| >>easier than tweaking Mark's parser to handle C.
| >>
| >
| > You have an interesting definition of "tweaking". Geoffrey Keating
| > gave an estimate of 6-9 man-years to merge the front ends making
| > them handle the present languages as fast as at present. This
| > compares to 1 man-week to write a functional C parser for the exact
| > present language accepted which also speeds up the compiler despite
| > not having been profiled or tuned for performance at all.
| >
| To be fair though, Geoff's estimate accounted for merging a lot
| of the semantic processing that continues to be semi-clones of
| each other, and continues to cause performance problems that have
| to be solved twice.
What are the basis of Geoff's estimates?
-- Gaby
prev parent reply other threads:[~2004-10-26 1:26 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-23 1:25 Joseph S. Myers
2004-10-23 2:39 ` Steven Bosscher
2004-10-23 4:15 ` Joseph S. Myers
2004-10-23 5:44 ` Scott Robert Ladd
2004-10-24 22:49 ` Joseph S. Myers
2004-10-26 0:32 ` Zack Weinberg
2004-10-26 1:03 ` Andrew Pinski
2004-10-26 1:03 ` Zack Weinberg
2004-10-26 1:11 ` Joseph S. Myers
2004-10-26 8:23 ` Zack Weinberg
2004-10-26 1:30 ` Gabriel Dos Reis
2004-10-26 1:06 ` Joseph S. Myers
2004-10-26 2:47 ` Joseph S. Myers
2004-10-26 3:48 ` Mark Mitchell
2004-10-26 12:21 ` Kyuupi
2004-10-26 12:32 ` Joseph S. Myers
2004-10-26 11:42 ` Joseph S. Myers
2004-10-27 19:04 ` Richard Henderson
2004-10-27 19:11 ` Richard Guenther
2004-10-27 19:41 ` Zack Weinberg
2004-10-27 19:31 ` Zack Weinberg
2004-10-27 21:31 ` Richard Henderson
2004-10-28 7:38 ` Alan Modra
2004-10-27 20:25 ` Joseph S. Myers
2004-10-25 22:33 ` Ziemowit Laski
2004-10-25 22:51 ` Joseph S. Myers
2004-10-25 23:45 ` Ziemowit Laski
2004-10-25 23:53 ` Scott Robert Ladd
2004-10-26 0:03 ` Unified front end for C and C++ (was Re: New C parser [patch]) Matt Austern
2004-10-26 1:26 ` Scott Robert Ladd
2004-10-26 1:43 ` Gabriel Dos Reis
2004-10-26 2:01 ` Scott Robert Ladd
2004-10-26 15:38 ` Gabriel Dos Reis
2004-10-26 0:28 ` New C parser [patch] Ziemowit Laski
2004-10-26 1:20 ` Scott Robert Ladd
2004-10-26 6:08 ` Unified C and C++ front end (was Re: New C parser [patch]) Matt Austern
2004-10-26 11:14 ` Joseph S. Myers
2004-10-26 16:04 ` Gabriel Dos Reis
2004-10-26 16:51 ` Joseph S. Myers
2004-10-26 0:37 ` New C parser [patch] Joseph S. Myers
2004-10-26 0:03 ` Stan Shebs
2004-10-26 1:46 ` Gabriel Dos Reis [this message]
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