From: Paul Koning <pkoning@xedia.com>
To: manfred@s-direktnet.de
Cc: law@cygnus.com, rms@gnu.org, gcc2@cygnus.com, egcs@cygnus.com
Subject: Re: New problems with gcc-2.8.0 based code - NOW FIXED!
Date: Tue, 30 Dec 1997 13:17:00 -0000 [thread overview]
Message-ID: <9712301904.AA09186@kona.> (raw)
In-Reply-To: <199712301444.PAA00543@saturn.s-direktnet.de>
GCC 2.7.2.1 had a bug that showed up in some backends, and EGCS
exposed it with more backends, where asm statements that should have
been treated as unmovable were actually moved. (Spefically, those
with no output arguments; the documentation quite rightly says that
those are always treated as if they were marked "volatile" even when
not so marked.)
That bug was fixed in egcs just a few weeks ago. If gcc 2.8.x doesn't
have the corresponding fix, that could account for the problem. As I
recall from the earlier discussion, one symptom of the bug was that
Linux would crash or otherwise misbehave, but only if you turned on
"enough" optimization.
The fix was only a few lines, you might try the experiment of applying
it to gcc 2.8 if the relevant module is reasonably similar.
paul
next prev parent reply other threads:[~1997-12-30 13:17 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-12-10 12:02 cannot bootstrap neither gcc-2.8.0-971206 nor egcs-971207 on sparc-sun-sunos4.1.3 Alexandre Oliva
1997-12-10 23:09 ` Manfred.Hollstein
1997-12-11 3:32 ` Paul Eggert
1997-12-11 1:51 ` Manfred.Hollstein
1997-12-22 12:06 ` Jeffrey A Law
1997-12-22 22:04 ` Alexandre Oliva
1997-12-26 8:11 ` New problems with gcc-2.8.0 based code [was: Re: cannot bootstrap neither gcc-2.8.0-971206 nor egcs-971207 on sparc-sun-sunos4.1.3 ] Manfred Hollstein
1997-12-27 12:13 ` New problems with gcc-2.8.0 based code - NOW FIXED! Manfred Hollstein
1997-12-28 23:23 ` Richard Stallman
1997-12-29 7:48 ` Jeffrey A Law
1997-12-29 11:17 ` Manfred Hollstein
1997-12-29 10:20 ` Jeffrey A Law
1997-12-30 8:57 ` Manfred Hollstein
1997-12-30 9:47 ` Andi Kleen
1998-01-01 10:02 ` Manfred Hollstein
1997-12-30 11:33 ` Philip Blundell
1997-12-30 13:17 ` Paul Koning [this message]
1997-12-29 11:08 ` Manfred Hollstein
[not found] <199712302041.MAA25118@atrus.synopsys.com>
1997-12-30 13:45 ` Toon Moene
[not found] <9712301949.AA01218@vlsi1.ultra.nyu.edu>
1997-12-30 13:52 ` Paul Koning
1997-12-30 12:27 ` Linus Torvalds
[not found] <9712302109.AA01369@vlsi1.ultra.nyu.edu>
1997-12-30 14:41 ` Paul Koning
1997-12-30 23:05 ` Richard Stallman
[not found] <9712302324.AA01798@vlsi1.ultra.nyu.edu>
1997-12-30 16:39 ` Paul Koning
[not found] <E0xnN2N-0005UN-00@paddington.london.uk.eu.org>
[not found] ` <199801030231.DAA25241@mail.macqel.be>
1998-01-05 10:13 ` Paul Koning
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