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From: "sje at cup dot hp dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/42869] GOMP_critical_start wrong on Itanium due to __sync miscompilation
Date: Tue, 09 Mar 2010 23:49:00 -0000 [thread overview]
Message-ID: <20100309234927.14755.qmail@sourceware.org> (raw)
In-Reply-To: <bug-42869-6957@http.gcc.gnu.org/bugzilla/>
------- Comment #4 from sje at cup dot hp dot com 2010-03-09 23:49 -------
Yes, I think this is clearly a bug in the IA64 definition of
sync_compare_and_swap. I think the fix is swapping the two instructions being
generated by the IA64 sync_compare_and_swap instruction. (cmpxchg4.rel
followed by a memory fence instead of a memory fence followed by cmpxchg4.rel).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42869
next prev parent reply other threads:[~2010-03-09 23:49 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-26 2:12 [Bug c/42869] New: " Hans dot Boehm at hp dot com
2010-01-26 12:06 ` [Bug target/42869] " rguenth at gcc dot gnu dot org
2010-03-09 23:25 ` sje at cup dot hp dot com
2010-03-09 23:33 ` jakub at gcc dot gnu dot org
2010-03-09 23:49 ` sje at cup dot hp dot com [this message]
2010-03-12 18:19 ` sje at gcc dot gnu dot org
2010-03-12 18:23 ` sje at cup dot hp dot com
2010-07-21 22:38 ` sje at gcc dot gnu dot org
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