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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++/29286] placement new does not provide required side-effects
Date: Fri, 29 Sep 2006 14:15:00 -0000 [thread overview]
Message-ID: <20060929141528.29967.qmail@sourceware.org> (raw)
In-Reply-To: <bug-29286-10053@http.gcc.gnu.org/bugzilla/>
------- Comment #1 from rguenth at gcc dot gnu dot org 2006-09-29 14:15 -------
The root of the problem is "wrong" alias information:
<bb 2>:
# SMT.6_27 = V_MAY_DEF <SMT.6_25>;
# SMT.7_28 = V_MAY_DEF <SMT.7_26>;
D.2530_3 = operator new (8);
f_4 = (struct Foo *) D.2530_3;
# SMT.6_29 = V_MAY_DEF <SMT.6_27>;
f_4->i = 1;
i_5 = 0;
goto <bb 4> (<L1>);
<L0>:;
D.2542_7 = 8;
__p_8 = f_1;
D.2544_9 = __p_8;
D.2544_10 = D.2544_9;
D.2535_11 = D.2544_10;
b_12 = (struct Bar *) D.2535_11;
# SMT.7_30 = V_MAY_DEF <SMT.7_24>;
b_12->p = 0B;
D.2545_13 = 8;
__p_14 = f_1;
D.2547_15 = __p_14;
D.2547_16 = D.2547_15;
D.2536_17 = D.2547_16;
f_18 = (struct Foo *) D.2536_17;
D.2537_19 = (long int) i_2;
# SMT.6_31 = V_MAY_DEF <SMT.6_23>;
f_18->i = D.2537_19;
i_20 = i_2 + 1;
# SMT.7_24 = PHI <SMT.7_28(2), SMT.7_30(3)>;
# SMT.6_23 = PHI <SMT.6_29(2), SMT.6_31(3)>;
# i_2 = PHI <i_5(2), i_20(3)>;
# f_1 = PHI <f_4(2), f_18(3)>;
<L1>:;
if (i_2 < n_6) goto <L0>; else goto <L2>;
<L2>:;
# VUSE <SMT.6_23>;
D.2538_21 = f_1->i;
return D.2538_21;
the stores to b_12->p and f_18->i appear to be independent. But there is
an implicit barrier between them from the std::new.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29286
next prev parent reply other threads:[~2006-09-29 14:15 UTC|newest]
Thread overview: 190+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-29 14:14 [Bug libstdc++/29286] New: " rguenth at gcc dot gnu dot org
2006-09-29 14:15 ` rguenth at gcc dot gnu dot org [this message]
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
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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