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* [Bug c++/13160] New: ABI=1 implementation difference vs. g++ 3.2
@ 2003-11-22 15:24 grigory at stl dot sarov dot ru
2003-12-26 23:17 ` [Bug c++/13160] " pinskia at gcc dot gnu dot org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: grigory at stl dot sarov dot ru @ 2003-11-22 15:24 UTC (permalink / raw)
To: gcc-bugs
For the simple class c1 listed below g++ 3.4 with default ABI (-fabi-version=1)
and g++ 3.2 give different size and alignment values. This is signifincant ABI
compatibility issue since -fabi-version=1 is stated as 3.2-compatible
implementation.
enum e0 { };
union c1 {
enum e0 : 20;
};
[g++ 3.4 20031112]
Class c1
size=3 align=1
base size=3 base align=1
c1 (0x403cc8c0) 0
[g++ (GCC) 3.2 20020903 (Red Hat Linux 8.0 3.2-7)]
Class c1
size=4 align=4
c1 (0x4031c3c0) 0
Note: the same difference exists in GCC 3.3.x series.
--
Summary: ABI=1 implementation difference vs. g++ 3.2
Product: gcc
Version: 3.4
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: grigory at stl dot sarov dot ru
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i686-redhat-linux
GCC host triplet: i686-redhat-linux
GCC target triplet: i686-redhat-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13160
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/13160] ABI=1 implementation difference vs. g++ 3.2
2003-11-22 15:24 [Bug c++/13160] New: ABI=1 implementation difference vs. g++ 3.2 grigory at stl dot sarov dot ru
@ 2003-12-26 23:17 ` pinskia at gcc dot gnu dot org
2003-12-29 21:41 ` pinskia at gcc dot gnu dot org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-12-26 23:17 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |critical
Keywords| |ABI
Summary|ABI=1 implementation |ABI=1 implementation
|difference vs. g++ 3.2 |difference vs. g++ 3.2
Target Milestone|--- |3.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13160
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/13160] ABI=1 implementation difference vs. g++ 3.2
2003-11-22 15:24 [Bug c++/13160] New: ABI=1 implementation difference vs. g++ 3.2 grigory at stl dot sarov dot ru
2003-12-26 23:17 ` [Bug c++/13160] " pinskia at gcc dot gnu dot org
@ 2003-12-29 21:41 ` pinskia at gcc dot gnu dot org
2004-01-10 16:09 ` pinskia at gcc dot gnu dot org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-12-29 21:41 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13160
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/13160] ABI=1 implementation difference vs. g++ 3.2
2003-11-22 15:24 [Bug c++/13160] New: ABI=1 implementation difference vs. g++ 3.2 grigory at stl dot sarov dot ru
2003-12-26 23:17 ` [Bug c++/13160] " pinskia at gcc dot gnu dot org
2003-12-29 21:41 ` pinskia at gcc dot gnu dot org
@ 2004-01-10 16:09 ` pinskia at gcc dot gnu dot org
2004-01-11 23:53 ` [Bug c++/13160] [3.3/3.4 Regression] " giovannibajo at libero dot it
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-01-10 16:09 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords|wrong-code |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13160
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/13160] [3.3/3.4 Regression] ABI=1 implementation difference vs. g++ 3.2
2003-11-22 15:24 [Bug c++/13160] New: ABI=1 implementation difference vs. g++ 3.2 grigory at stl dot sarov dot ru
` (2 preceding siblings ...)
2004-01-10 16:09 ` pinskia at gcc dot gnu dot org
@ 2004-01-11 23:53 ` giovannibajo at libero dot it
2004-01-11 23:57 ` giovannibajo at libero dot it
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: giovannibajo at libero dot it @ 2004-01-11 23:53 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2004-01-11 23:53 -------
Confirmed on both 3.3 and 3.4. Critical regression I'd say.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |giovannibajo at libero dot
| |it
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-01-11 23:53:36
date| |
Summary|ABI=1 implementation |[3.3/3.4 Regression] ABI=1
|difference vs. g++ 3.2 |implementation difference
| |vs. g++ 3.2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13160
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/13160] [3.3/3.4 Regression] ABI=1 implementation difference vs. g++ 3.2
2003-11-22 15:24 [Bug c++/13160] New: ABI=1 implementation difference vs. g++ 3.2 grigory at stl dot sarov dot ru
` (3 preceding siblings ...)
2004-01-11 23:53 ` [Bug c++/13160] [3.3/3.4 Regression] " giovannibajo at libero dot it
@ 2004-01-11 23:57 ` giovannibajo at libero dot it
2004-01-15 7:50 ` pinskia at gcc dot gnu dot org
2004-02-05 5:44 ` [Bug c++/13160] [3.3/3.4/3.5 " mmitchel at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: giovannibajo at libero dot it @ 2004-01-11 23:57 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2004-01-11 23:57 -------
Nathan, can you look into this regression? It seems pretty critical.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |nathan at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13160
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/13160] [3.3/3.4 Regression] ABI=1 implementation difference vs. g++ 3.2
2003-11-22 15:24 [Bug c++/13160] New: ABI=1 implementation difference vs. g++ 3.2 grigory at stl dot sarov dot ru
` (4 preceding siblings ...)
2004-01-11 23:57 ` giovannibajo at libero dot it
@ 2004-01-15 7:50 ` pinskia at gcc dot gnu dot org
2004-02-05 5:44 ` [Bug c++/13160] [3.3/3.4/3.5 " mmitchel at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-01-15 7:50 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-01-15 07:49 -------
This changed between 3.3 20020928 and 3.3 20021001 (this was done using Phil's
regression hunter and using the testcase below and having a function which returns the
sizeof of the union and looking at the asm).
Almost I think it is caused by this patch: <http://gcc.gnu.org/ml/gcc-patches/2002-09/
msg01814.html>, it is the only ABI patch that went in during that time.
Mark could you look at this because it might be caused by you patch
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |mark at codesourcery dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13160
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/13160] [3.3/3.4/3.5 Regression] ABI=1 implementation difference vs. g++ 3.2
2003-11-22 15:24 [Bug c++/13160] New: ABI=1 implementation difference vs. g++ 3.2 grigory at stl dot sarov dot ru
` (5 preceding siblings ...)
2004-01-15 7:50 ` pinskia at gcc dot gnu dot org
@ 2004-02-05 5:44 ` mmitchel at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2004-02-05 5:44 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From mmitchel at gcc dot gnu dot org 2004-02-05 05:44 -------
This is not a C++ ABI change; it is a *C* ABI change, and an intentional one.
See:
http://gcc.gnu.org/ml/gcc/2002-09/msg01109.html
and the follow-up thread for the rationale.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13160
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2004-02-05 5:44 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2003-11-22 15:24 [Bug c++/13160] New: ABI=1 implementation difference vs. g++ 3.2 grigory at stl dot sarov dot ru
2003-12-26 23:17 ` [Bug c++/13160] " pinskia at gcc dot gnu dot org
2003-12-29 21:41 ` pinskia at gcc dot gnu dot org
2004-01-10 16:09 ` pinskia at gcc dot gnu dot org
2004-01-11 23:53 ` [Bug c++/13160] [3.3/3.4 Regression] " giovannibajo at libero dot it
2004-01-11 23:57 ` giovannibajo at libero dot it
2004-01-15 7:50 ` pinskia at gcc dot gnu dot org
2004-02-05 5:44 ` [Bug c++/13160] [3.3/3.4/3.5 " mmitchel at gcc dot gnu dot org
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