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* [Bug optimization/13049] New: Does not warn on obious aliasing problem
@ 2003-11-14 10:00 pinskia at gcc dot gnu dot org
2003-11-15 2:50 ` [Bug optimization/13049] Does not warn on obvious " pinskia at gcc dot gnu dot org
` (8 more replies)
0 siblings, 9 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-11-14 10:00 UTC (permalink / raw)
To: gcc-bugs
The following code should warn as there is an aliasing problem in the code (derived from gcc in
SPEC, yes that old code):
struct tt
{
struct
{
short i;
short j;
}t;
};
void t(struct tt *i)
{
((int*)i)[0] = 0;
i->t.j = 2;
}
--
Summary: Does not warn on obious aliasing problem
Product: gcc
Version: 3.4
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P2
Component: optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pinskia at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13049
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug optimization/13049] Does not warn on obvious aliasing problem
2003-11-14 10:00 [Bug optimization/13049] New: Does not warn on obious aliasing problem pinskia at gcc dot gnu dot org
@ 2003-11-15 2:50 ` pinskia at gcc dot gnu dot org
2003-11-21 23:30 ` pinskia at gcc dot gnu dot org
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-11-15 2:50 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Summary|Does not warn on obious |Does not warn on obvious
|aliasing problem |aliasing problem
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13049
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug optimization/13049] Does not warn on obvious aliasing problem
2003-11-14 10:00 [Bug optimization/13049] New: Does not warn on obious aliasing problem pinskia at gcc dot gnu dot org
2003-11-15 2:50 ` [Bug optimization/13049] Does not warn on obvious " pinskia at gcc dot gnu dot org
@ 2003-11-21 23:30 ` pinskia at gcc dot gnu dot org
2003-11-23 23:24 ` pinskia at gcc dot gnu dot org
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-11-21 23:30 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13049
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug optimization/13049] Does not warn on obvious aliasing problem
2003-11-14 10:00 [Bug optimization/13049] New: Does not warn on obious aliasing problem pinskia at gcc dot gnu dot org
2003-11-15 2:50 ` [Bug optimization/13049] Does not warn on obvious " pinskia at gcc dot gnu dot org
2003-11-21 23:30 ` pinskia at gcc dot gnu dot org
@ 2003-11-23 23:24 ` pinskia at gcc dot gnu dot org
2003-11-28 20:34 ` pinskia at gcc dot gnu dot org
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-11-23 23:24 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Priority|P2 |P3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13049
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug optimization/13049] Does not warn on obvious aliasing problem
2003-11-14 10:00 [Bug optimization/13049] New: Does not warn on obious aliasing problem pinskia at gcc dot gnu dot org
` (2 preceding siblings ...)
2003-11-23 23:24 ` pinskia at gcc dot gnu dot org
@ 2003-11-28 20:34 ` pinskia at gcc dot gnu dot org
2004-02-27 5:58 ` pinskia at gcc dot gnu dot org
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-11-28 20:34 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2003-11-28 20:34:22
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13049
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug optimization/13049] Does not warn on obvious aliasing problem
2003-11-14 10:00 [Bug optimization/13049] New: Does not warn on obious aliasing problem pinskia at gcc dot gnu dot org
` (3 preceding siblings ...)
2003-11-28 20:34 ` pinskia at gcc dot gnu dot org
@ 2004-02-27 5:58 ` pinskia at gcc dot gnu dot org
2004-04-05 0:53 ` pinskia at gcc dot gnu dot org
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-02-27 5:58 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-02-27 05:58 -------
Mine as the reason why this does not happen is because &a->b is lowered so that there
is only a cast.
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |pinskia at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13049
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug optimization/13049] Does not warn on obvious aliasing problem
2003-11-14 10:00 [Bug optimization/13049] New: Does not warn on obious aliasing problem pinskia at gcc dot gnu dot org
` (4 preceding siblings ...)
2004-02-27 5:58 ` pinskia at gcc dot gnu dot org
@ 2004-04-05 0:53 ` pinskia at gcc dot gnu dot org
2004-06-20 20:47 ` [Bug rtl-optimization/13049] " pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-04-05 0:53 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-04-05 00:53 -------
Actually I was wrong, the reason why it does not warn is because we do not take the
address so the warning is not going to be emitted at all. I am not working on this any
more.
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|pinskia at gcc dot gnu dot |unassigned at gcc dot gnu
|org |dot org
Status|ASSIGNED |NEW
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13049
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug rtl-optimization/13049] Does not warn on obvious aliasing problem
2003-11-14 10:00 [Bug optimization/13049] New: Does not warn on obious aliasing problem pinskia at gcc dot gnu dot org
` (5 preceding siblings ...)
2004-04-05 0:53 ` pinskia at gcc dot gnu dot org
@ 2004-06-20 20:47 ` pinskia at gcc dot gnu dot org
2005-02-27 5:22 ` pinskia at gcc dot gnu dot org
2005-09-26 15:39 ` pinskia at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-20 20:47 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-20 20:47 -------
But the reason why do not even think about warning has to do with the lowering part though.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13049
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug rtl-optimization/13049] Does not warn on obvious aliasing problem
2003-11-14 10:00 [Bug optimization/13049] New: Does not warn on obious aliasing problem pinskia at gcc dot gnu dot org
` (6 preceding siblings ...)
2004-06-20 20:47 ` [Bug rtl-optimization/13049] " pinskia at gcc dot gnu dot org
@ 2005-02-27 5:22 ` pinskia at gcc dot gnu dot org
2005-09-26 15:39 ` pinskia at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-27 5:22 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-26 14:26 -------
*** Bug 20189 has been marked as a duplicate of this bug. ***
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |dirk at cle-mens dot de
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13049
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug rtl-optimization/13049] Does not warn on obvious aliasing problem
2003-11-14 10:00 [Bug optimization/13049] New: Does not warn on obious aliasing problem pinskia at gcc dot gnu dot org
` (7 preceding siblings ...)
2005-02-27 5:22 ` pinskia at gcc dot gnu dot org
@ 2005-09-26 15:39 ` pinskia at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-26 15:39 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-26 15:38 -------
Even -Wstrict-aliasing=2 does not warn.
--
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2005-05-27 00:40:18 |2005-09-26 15:38:54
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13049
^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2005-09-26 15:39 UTC | newest]
Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
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2003-11-14 10:00 [Bug optimization/13049] New: Does not warn on obious aliasing problem pinskia at gcc dot gnu dot org
2003-11-15 2:50 ` [Bug optimization/13049] Does not warn on obvious " pinskia at gcc dot gnu dot org
2003-11-21 23:30 ` pinskia at gcc dot gnu dot org
2003-11-23 23:24 ` pinskia at gcc dot gnu dot org
2003-11-28 20:34 ` pinskia at gcc dot gnu dot org
2004-02-27 5:58 ` pinskia at gcc dot gnu dot org
2004-04-05 0:53 ` pinskia at gcc dot gnu dot org
2004-06-20 20:47 ` [Bug rtl-optimization/13049] " pinskia at gcc dot gnu dot org
2005-02-27 5:22 ` pinskia at gcc dot gnu dot org
2005-09-26 15:39 ` pinskia at gcc dot gnu dot org
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