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From: "gdr at cs dot tamu dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/29286] [4.0/4.1/4.2/4.3 Regression] placement new does not change the dynamic type as it should
Date: Thu, 24 May 2007 00:07:00 -0000	[thread overview]
Message-ID: <20070524000652.15840.qmail@sourceware.org> (raw)
In-Reply-To: <bug-29286-10053@http.gcc.gnu.org/bugzilla/>



------- Comment #152 from gdr at cs dot tamu dot edu  2007-05-24 01:06 -------
Subject: Re:  [4.0/4.1/4.2/4.3 Regression] placement new does not change the
dynamic type as it should

"mark at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org> writes:

[...]

| However, I don't like this approach because I believe it will result in
| inferior code.

I believe (without offering data, sorry) it *may* yield inferior code.
However, my original point was to make sure that we understood your
interpretation was a change to the C++ standard object model.

Given the consequences, I think it was appropriate to raise the issue
to the C++ committee.  So far, the only response I got was the
sentiment that it is a change in semantics. Given C99's move, it is
essential for C++ to get to a better state of the object model.
However, C99's notion of "effective type" is not without its own set of
problems (already in C99).  The details can be found in Nick
MacLaren's paper.

-- Gaby


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29286


  parent reply	other threads:[~2007-05-24  0:07 UTC|newest]

Thread overview: 190+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-09-29 14:14 [Bug libstdc++/29286] New: placement new does not provide required side-effects rguenth at gcc dot gnu dot org
2006-09-29 14:15 ` [Bug libstdc++/29286] " rguenth at gcc dot gnu dot org
2006-09-29 14:17 ` [Bug libstdc++/29286] [4.2 Regression] " rguenth at gcc dot gnu dot org
2006-09-29 14:30 ` pcarlini at suse dot de
2006-09-29 14:38 ` rguenth at gcc dot gnu dot org
2006-09-29 14:52 ` pcarlini at suse dot de
2006-09-29 15:49 ` pinskia at gcc dot gnu dot org
2006-09-29 15:51 ` [Bug libstdc++/29286] [4.2 Regression] placement new does not change the dynamic type as it should pinskia at gcc dot gnu dot org
2006-09-29 16:08 ` pcarlini at suse dot de
2006-09-29 16:19 ` pinskia at gcc dot gnu dot org
2006-09-29 16:23 ` pcarlini at suse dot de
2006-09-29 16:25 ` rguenth at gcc dot gnu dot org
2006-09-29 16:25 ` rguenth at gcc dot gnu dot org
2006-09-29 16:58 ` [Bug libstdc++/29286] [4.0/4.1/4.2 " pinskia at gcc dot gnu dot org
2006-09-29 17:01 ` pinskia at gcc dot gnu dot org
2006-10-01 18:39 ` mmitchel at gcc dot gnu dot org
2006-10-01 23:05 ` mmitchel at gcc dot gnu dot org
2006-10-02  9:32 ` mrs at apple dot com
2006-10-02 17:48 ` mmitchel at gcc dot gnu dot org
2006-10-02 19:28 ` mrs at apple dot com
2006-10-03 16:03 ` ian at airs dot com
2006-10-03 16:13 ` mark at codesourcery dot com
2006-10-03 23:44 ` ian at airs dot com
2006-10-04  5:39 ` mark at codesourcery dot com
2006-10-24  6:53   ` Gabriel Dos Reis
2006-10-09  8:22 ` rguenth at gcc dot gnu dot org
2006-10-24  6:53 ` [Bug libstdc++/29286] [4.0/4.1/4.2/4.3 " gdr at integrable-solutions dot net
2006-12-29 20:28 ` dberlin at gcc dot gnu dot org
2007-01-01  0:41 ` mark at codesourcery dot com
2007-01-02  3:01   ` Daniel Berlin
2007-01-02  3:01 ` dberlin at dberlin dot org
2007-01-02  3:24 ` mark at codesourcery dot com
2007-05-02 15:57 ` ian at airs dot com
2007-05-02 16:11 ` pinskia at gcc dot gnu dot org
2007-05-02 16:14 ` pinskia at gcc dot gnu dot org
2007-05-02 20:41 ` mark at codesourcery dot com
2007-05-03 19:33 ` ian at airs dot com
2007-05-03 20:45 ` pcarlini at suse dot de
2007-05-03 20:49 ` pinskia at gcc dot gnu dot org
2007-05-03 20:59 ` rguenth at gcc dot gnu dot org
2007-05-03 21:25 ` pcarlini at suse dot de
2007-05-04  2:47 ` mark at codesourcery dot com
2007-05-04  3:54 ` bangerth at dealii dot org
2007-05-04  6:37 ` ian at airs dot com
2007-05-04  8:41 ` pcarlini at suse dot de
2007-05-04 10:45 ` rguenth at gcc dot gnu dot org
2007-05-04 11:04 ` pcarlini at suse dot de
2007-05-04 11:08 ` pcarlini at suse dot de
2007-05-04 12:03 ` rguenth at gcc dot gnu dot org
2007-05-04 14:31 ` rguenth at gcc dot gnu dot org
2007-05-04 15:55 ` ian at airs dot com
2007-05-04 15:57 ` rguenth at gcc dot gnu dot org
2007-05-11 23:22 ` ian at airs dot com
2007-05-12  0:36 ` dberlin at dberlin dot org
2007-05-12  9:48 ` rguenth at gcc dot gnu dot org
2007-05-12 11:11 ` rguenth at gcc dot gnu dot org
2007-05-12 13:29 ` dberlin at dberlin dot org
2007-05-12 18:41 ` ian at airs dot com
2007-05-12 18:44 ` ian at airs dot com
2007-05-12 21:48 ` rguenth at gcc dot gnu dot org
2007-05-13 10:04 ` rguenth at gcc dot gnu dot org
2007-05-14  3:45 ` ian at airs dot com
2007-05-14  4:00 ` dberlin at dberlin dot org
2007-05-14  8:25 ` rguenth at gcc dot gnu dot org
2007-05-14 11:44   ` Daniel Berlin
2007-05-14 11:44 ` dberlin at dberlin dot org
2007-05-14 15:20 ` rguenth at gcc dot gnu dot org
2007-05-14 15:38 ` dberlin at dberlin dot org
2007-05-14 16:42 ` ian at airs dot com
2007-05-14 17:14 ` ian at airs dot com
2007-05-14 21:25 ` mmitchel at gcc dot gnu dot org
2007-05-14 21:36 ` ian at airs dot com
2007-05-14 21:37 ` pinskia at gcc dot gnu dot org
2007-05-14 21:40 ` dberlin at dberlin dot org
2007-05-16  5:33 ` ian at airs dot com
2007-05-16  9:57 ` rguenth at gcc dot gnu dot org
2007-05-16 12:06 ` rguenth at gcc dot gnu dot org
2007-05-16 13:49 ` rguenth at gcc dot gnu dot org
2007-05-16 14:02 ` rguenth at gcc dot gnu dot org
2007-05-16 14:37 ` rguenth at gcc dot gnu dot org
2007-05-16 16:08 ` rguenth at gcc dot gnu dot org
2007-05-16 17:02 ` ian at airs dot com
2007-05-16 23:42 ` mark at codesourcery dot com
2007-05-18  6:15 ` ian at airs dot com
2007-05-18  6:25 ` ian at airs dot com
2007-05-18  6:27 ` mark at codesourcery dot com
2007-05-18  8:46 ` rguenth at gcc dot gnu dot org
2007-05-18  8:47 ` rguenth at gcc dot gnu dot org
2007-05-18 13:26 ` gdr at cs dot tamu dot edu
2007-05-18 13:30 ` gdr at cs dot tamu dot edu
2007-05-18 13:46 ` rguenth at gcc dot gnu dot org
2007-05-18 16:25 ` ian at airs dot com
2007-05-18 16:28 ` ian at airs dot com
2007-05-18 21:04   ` Gabriel Dos Reis
2007-05-18 16:36 ` ian at airs dot com
2007-05-18 16:44 ` mark at codesourcery dot com
2007-05-18 17:38 ` ian at airs dot com
2007-05-18 21:12   ` Gabriel Dos Reis
2007-05-18 17:46 ` pcarlini at suse dot de
2007-05-18 17:55 ` pinskia at gcc dot gnu dot org
2007-05-18 18:01 ` mark at codesourcery dot com
2007-05-18 18:03 ` ian at airs dot com
2007-05-18 19:55 ` rguenth at gcc dot gnu dot org
2007-05-18 20:12 ` pcarlini at suse dot de
2007-05-18 20:17 ` mark at codesourcery dot com
2007-05-18 20:27 ` pcarlini at suse dot de
2007-05-18 20:38 ` pcarlini at suse dot de
2007-05-18 21:04 ` gdr at cs dot tamu dot edu
2007-05-18 21:12 ` gdr at cs dot tamu dot edu
2007-05-18 21:16 ` gdr at cs dot tamu dot edu
2007-05-18 21:17 ` gdr at cs dot tamu dot edu
2007-05-18 21:44 ` pcarlini at suse dot de
2007-05-22  9:50 ` rguenth at gcc dot gnu dot org
2007-05-22 15:05 ` mark at codesourcery dot com
2007-05-22 15:54   ` Gabriel Dos Reis
2007-05-22 15:20 ` rguenther at suse dot de
2007-05-22 15:55 ` gdr at cs dot tamu dot edu
2007-05-22 16:20 ` mark at codesourcery dot com
2007-05-22 16:25   ` Gabriel Dos Reis
2007-05-22 16:25 ` gdr at cs dot tamu dot edu
2007-05-22 16:38 ` mark at codesourcery dot com
2007-05-22 16:46   ` Gabriel Dos Reis
2007-05-22 16:47 ` gdr at cs dot tamu dot edu
2007-05-22 16:54 ` mark at codesourcery dot com
2007-05-22 17:02 ` gdr at cs dot tamu dot edu
2007-05-22 17:11 ` dberlin at dberlin dot org
2007-05-22 17:13 ` dberlin at dberlin dot org
2007-05-22 17:20 ` gdr at cs dot tamu dot edu
2007-05-22 17:34 ` mark at codesourcery dot com
2007-05-22 17:41 ` gdr at cs dot tamu dot edu
2007-05-22 17:55 ` mark at codesourcery dot com
2007-05-22 19:13 ` gdr at cs dot tamu dot edu
2007-05-22 19:42 ` mrs at apple dot com
2007-05-22 19:53 ` gdr at cs dot tamu dot edu
2007-05-23  8:35 ` rguenther at suse dot de
2007-05-23 13:23 ` gdr at cs dot tamu dot edu
2007-05-23 13:43 ` rguenther at suse dot de
2007-05-23 14:24 ` ian at airs dot com
2007-05-23 14:38 ` rguenther at suse dot de
2007-05-23 15:00 ` gdr at cs dot tamu dot edu
2007-05-23 15:43 ` ian at airs dot com
2007-05-23 15:55 ` rguenther at suse dot de
2007-05-23 18:03 ` dberlin at dberlin dot org
2007-05-23 18:44 ` mark at codesourcery dot com
2007-05-23 18:54 ` rguenth at gcc dot gnu dot org
2007-05-23 18:57 ` rguenth at gcc dot gnu dot org
2007-05-23 19:10 ` mark at codesourcery dot com
2007-05-23 19:46 ` rguenth at gcc dot gnu dot org
2007-05-23 19:57 ` rguenth at gcc dot gnu dot org
2007-05-23 20:01 ` joseph at codesourcery dot com
2007-05-23 20:07 ` mark at codesourcery dot com
2007-05-23 20:13 ` mark at codesourcery dot com
2007-05-23 20:16 ` rguenther at suse dot de
2007-05-23 20:27 ` mark at codesourcery dot com
2007-05-23 20:48 ` rguenther at suse dot de
2007-05-23 21:02 ` dberlin at dberlin dot org
2007-05-23 21:13 ` mark at codesourcery dot com
2007-05-23 22:42 ` gdr at cs dot tamu dot edu
2007-05-23 22:50 ` gdr at cs dot tamu dot edu
2007-05-23 22:56 ` gdr at cs dot tamu dot edu
2007-05-23 22:58 ` gdr at cs dot tamu dot edu
2007-05-23 23:58 ` gdr at cs dot tamu dot edu
2007-05-24  0:07 ` gdr at cs dot tamu dot edu [this message]
2007-05-24  8:04 ` rguenther at suse dot de
2007-05-24  9:08 ` rguenther at suse dot de
2007-05-24  9:11 ` rguenther at suse dot de
2007-05-24  9:29 ` gdr at cs dot tamu dot edu
2007-05-24  9:33 ` rguenther at suse dot de
2007-05-24  9:47 ` gdr at cs dot tamu dot edu
2007-05-25 23:22 ` ian at airs dot com
2007-05-27 14:57 ` rguenther at suse dot de
2007-05-28 11:14 ` rguenther at suse dot de
2007-05-28 11:24 ` dberlin at dberlin dot org
2007-05-28 17:30 ` ian at airs dot com
2007-05-30 23:19 ` ian at airs dot com
2007-06-04 14:02 ` rguenth at gcc dot gnu dot org
2007-06-05 16:20 ` rguenth at gcc dot gnu dot org
2007-06-05 20:48 ` ian at airs dot com
2007-06-05 21:17 ` rguenther at suse dot de
2007-06-06  5:33 ` ian at airs dot com
2007-06-06  8:41 ` rguenther at suse dot de
2007-06-08  7:50 ` ian at airs dot com
2007-06-08 13:47 ` rguenther at suse dot de
2007-06-09  9:48 ` rguenth at gcc dot gnu dot org
2007-06-09  9:55 ` pcarlini at suse dot de
2007-06-09 12:03 ` bkoz at gcc dot gnu dot org
2007-06-09 19:29 ` mark at codesourcery dot com
2007-06-12 17:48 ` ian at gcc dot gnu dot org
2007-06-12 18:11 ` ian at airs dot com
2010-06-20  0:01 ` schaub-johannes at web dot de

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