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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/38477] [strict-aliasing] warning message contains compiler-generated symbols
Date: Fri, 12 Dec 2008 12:10:00 -0000	[thread overview]
Message-ID: <20081212120903.13337.qmail@sourceware.org> (raw)
In-Reply-To: <bug-38477-16067@http.gcc.gnu.org/bugzilla/>



------- Comment #9 from rguenth at gcc dot gnu dot org  2008-12-12 12:09 -------
Btw, if you want to dig yourself - the problem is that the alias set of
const struct _Rb_tree_node is not a subset of struct test.  So the access
of any part of an object of type struct test through a pointer of type
const struct _Rb_tree_node * invokes undefined behavior (from the middle-end
perspective).

See alias.c:record_component_aliases for how the relationship is built.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38477


  parent reply	other threads:[~2008-12-12 12:10 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-12-10 17:17 [Bug c++/38477] New: " dimhen at gmail dot com
2008-12-10 17:40 ` [Bug libstdc++/38477] " rguenth at gcc dot gnu dot org
2008-12-10 17:46 ` rguenth at gcc dot gnu dot org
2008-12-12 11:11 ` paolo dot carlini at oracle dot com
2008-12-12 11:25 ` rguenth at gcc dot gnu dot org
2008-12-12 11:40 ` paolo dot carlini at oracle dot com
2008-12-12 11:45 ` rguenth at gcc dot gnu dot org
2008-12-12 11:54 ` paolo dot carlini at oracle dot com
2008-12-12 11:58 ` rguenth at gcc dot gnu dot org
2008-12-12 12:10 ` rguenth at gcc dot gnu dot org [this message]
2009-01-05 23:47 ` bkoz at gcc dot gnu dot org
2009-01-06 19:45 ` rguenth at gcc dot gnu dot org
2009-01-12 14:26 ` rguenth at gcc dot gnu dot org
2009-01-12 14:43 ` pluto at agmk dot net
2009-01-12 14:52 ` rguenth at gcc dot gnu dot org
2009-01-13 11:03 ` rguenth at gcc dot gnu dot org
2009-01-13 12:14 ` rguenth at gcc dot gnu dot org
2009-01-14 16:45 ` [Bug middle-end/38477] " rguenth at gcc dot gnu dot org
2009-01-14 16:47 ` rguenth at gcc dot gnu dot org

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