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* [Bug optimization/11059] New: empty union optimization ice
@ 2003-06-02 5:04 jelenz@students.wisc.edu
2003-06-02 5:10 ` [Bug optimization/11059] [3.3/3.4 regression] " pinskia@physics.uc.edu
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: jelenz@students.wisc.edu @ 2003-06-02 5:04 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11059
Summary: empty union optimization ice
Product: gcc
Version: 3.3
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: jelenz@students.wisc.edu
CC: gcc-bugs@gcc.gnu.org
I have narrowed the seg fault down to the small file
union uni {};
int main() {
uni *h;
h = (uni *)new uni();
}
When compiling that file with optimizations turned on
gcc -O2 seg.cxx
seg.cxx: In function `int main()':
seg.cxx:5: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
The error happens on both gcc 3.3 and 3.2. Compiling without any optimizations
works fine. Changing the untion to "union uni { int a; };" does not produce the
error.
I am using gcc from Debian GNU/Linux on i386.
gcc -v
Reading specs from /usr/lib/gcc-lib/i386-linux/3.3/specs
Configured with: ../src/configure -v
--enable-languages=c,c++,java,f77,pascal,objc,ada,treelang --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-gxx-include-dir=/usr/include/c++/3.3 --enable-shared --with-system-zlib
--enable-nls --without-included-gettext --enable-__cxa_atexit
--enable-clocale=gnu --enable-debug --enable-java-gc=boehm
--enable-java-awt=xlib --enable-objc-gc i386-linux
Thread model: posix
gcc version 3.3 (Debian)
gcc-3.2 -v
Reading specs from /usr/lib/gcc-lib/i386-linux/3.2.3/specs
Configured with: ../src/configure -v --enable-languages=c,c++,java,f77,objc,ada
--prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info
--with-gxx-include-dir=/usr/include/c++/3.2 --enable-shared --with-system-zlib
--enable-nls --without-included-gettext --enable-__cxa_atexit
--enable-clocale=gnu --enable-java-gc=boehm --enable-objc-gc i386-linux
Thread model: posix
gcc version 3.2.3
John
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^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug optimization/11059] [3.3/3.4 regression] empty union optimization ice
2003-06-02 5:04 [Bug optimization/11059] New: empty union optimization ice jelenz@students.wisc.edu
@ 2003-06-02 5:10 ` pinskia@physics.uc.edu
2003-07-07 18:54 ` cvs-commit at gcc dot gnu dot org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia@physics.uc.edu @ 2003-06-02 5:10 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11059
pinskia@physics.uc.edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Keywords| |ice-on-valid-code
Last reconfirmed|0000-00-00 00:00:00 |2003-06-02 05:09:59
date| |
Summary|empty union optimization ice|[3.3/3.4 regression] empty
| |union optimization ice
Target Milestone|3.4 |3.3.1
------- Additional Comments From pinskia@physics.uc.edu 2003-06-02 05:09 -------
It worked on 3.0.4 and 2.95.3 but fails on mainline (20030601), 3.3.1 (20030526) and
3.2.3.
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* [Bug optimization/11059] [3.3/3.4 regression] empty union optimization ice
2003-06-02 5:04 [Bug optimization/11059] New: empty union optimization ice jelenz@students.wisc.edu
2003-06-02 5:10 ` [Bug optimization/11059] [3.3/3.4 regression] " pinskia@physics.uc.edu
@ 2003-07-07 18:54 ` cvs-commit at gcc dot gnu dot org
2003-07-11 14:44 ` [Bug optimization/11059] [3.3 " pinskia at physics dot uc dot edu
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2003-07-07 18:54 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11059
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2003-07-07 18:54 -------
Subject: Bug 11059
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: sayle@gcc.gnu.org 2003-07-07 18:54:28
Modified files:
gcc : ChangeLog expr.c
gcc/testsuite : ChangeLog
Added files:
gcc/testsuite/g++.dg/opt: emptyunion.C
Log message:
PR optimization/11059
* expr.c (can_store_by_pieces): Return true if length is zero.
(store_by_pieces): If length is zero and endp is two, abort,
othwerise, if length is zero and endp is not two, return "to".
(clear_by_pieces): Do nothing if length is zero.
(clear_storage): Do nothing if length is zero.
(store_constructor): Simplify code when size is zero, or the
target has already been cleared. This avoids emitting a
blockage instruction when initializing empty structures.
* g++.dg/opt/emptyunion.C: New testcase.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.380&r2=2.381
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/expr.c.diff?cvsroot=gcc&r1=1.565&r2=1.566
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.2846&r2=1.2847
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/opt/emptyunion.C.diff?cvsroot=gcc&r1=NONE&r2=1.1
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug optimization/11059] [3.3 regression] empty union optimization ice
2003-06-02 5:04 [Bug optimization/11059] New: empty union optimization ice jelenz@students.wisc.edu
2003-06-02 5:10 ` [Bug optimization/11059] [3.3/3.4 regression] " pinskia@physics.uc.edu
2003-07-07 18:54 ` cvs-commit at gcc dot gnu dot org
@ 2003-07-11 14:44 ` pinskia at physics dot uc dot edu
2003-07-13 21:37 ` cvs-commit at gcc dot gnu dot org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-11 14:44 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11059
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Summary|[3.3/3.4 regression] empty |[3.3 regression] empty union
|union optimization ice |optimization ice
------- Additional Comments From pinskia at physics dot uc dot edu 2003-07-11 14:44 -------
This is a regression only in 3.3 now.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug optimization/11059] [3.3 regression] empty union optimization ice
2003-06-02 5:04 [Bug optimization/11059] New: empty union optimization ice jelenz@students.wisc.edu
` (2 preceding siblings ...)
2003-07-11 14:44 ` [Bug optimization/11059] [3.3 " pinskia at physics dot uc dot edu
@ 2003-07-13 21:37 ` cvs-commit at gcc dot gnu dot org
2003-07-13 21:40 ` pinskia at physics dot uc dot edu
2003-07-16 11:42 ` cvs-commit at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2003-07-13 21:37 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11059
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2003-07-13 21:37 -------
Subject: Bug 11059
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-3_3-branch
Changes by: sayle@gcc.gnu.org 2003-07-13 21:37:49
Modified files:
gcc : ChangeLog expr.c
gcc/testsuite : ChangeLog
Added files:
gcc/testsuite/g++.dg/opt: emptyunion.C
Log message:
PR optimization/11059
* expr.c (can_store_by_pieces): Return true if length is zero.
(store_by_pieces): Do nothing if length is zero.
(clear_by_pieces): Do nothing if length is zero.
(clear_storage): Do nothing if length is zero.
(store_constructor): Simplify code when size is zero, or the
target has already been cleared. This avoids emitting a
blockage instruction when initializing empty structures.
* g++.dg/opt/emptyunion.C: New testcase.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.16114.2.653&r2=1.16114.2.654
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/expr.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.498.2.18&r2=1.498.2.19
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.2261.2.228&r2=1.2261.2.229
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/opt/emptyunion.C.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=NONE&r2=1.1.6.1
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug optimization/11059] [3.3 regression] empty union optimization ice
2003-06-02 5:04 [Bug optimization/11059] New: empty union optimization ice jelenz@students.wisc.edu
` (3 preceding siblings ...)
2003-07-13 21:37 ` cvs-commit at gcc dot gnu dot org
@ 2003-07-13 21:40 ` pinskia at physics dot uc dot edu
2003-07-16 11:42 ` cvs-commit at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-13 21:40 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11059
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
------- Additional Comments From pinskia at physics dot uc dot edu 2003-07-13 21:40 -------
Fixed by the above patch in 3.3.1 and the mainline.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug optimization/11059] [3.3 regression] empty union optimization ice
2003-06-02 5:04 [Bug optimization/11059] New: empty union optimization ice jelenz@students.wisc.edu
` (4 preceding siblings ...)
2003-07-13 21:40 ` pinskia at physics dot uc dot edu
@ 2003-07-16 11:42 ` cvs-commit at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2003-07-16 11:42 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11059
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2003-07-16 11:42 -------
Subject: Bug 11059
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-3_2-rhl8-branch
Changes by: jakub@gcc.gnu.org 2003-07-16 11:42:39
Modified files:
gcc : ChangeLog expr.c
gcc/testsuite : ChangeLog
Added files:
gcc/testsuite/g++.dg/opt: emptyunion.C
Log message:
2003-07-07 Roger Sayle <roger@eyesopen.com>
PR optimization/11059
* expr.c (can_store_by_pieces): Return true if length is zero.
(store_by_pieces): If length is zero and endp is two, abort,
othwerise, if length is zero and endp is not two, return "to".
(clear_by_pieces): Do nothing if length is zero.
(clear_storage): Do nothing if length is zero.
(store_constructor): Simplify code when size is zero, or the
target has already been cleared. This avoids emitting a
blockage instruction when initializing empty structures.
2003-07-07 Roger Sayle <roger@eyesopen.com>
PR optimization/11059
* g++.dg/opt/emptyunion.C: New testcase.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_2-rhl8-branch&r1=1.13152.2.657.2.27.2.143&r2=1.13152.2.657.2.27.2.144
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/expr.c.diff?cvsroot=gcc&only_with_tag=gcc-3_2-rhl8-branch&r1=1.423.2.19.4.1.2.16&r2=1.423.2.19.4.1.2.17
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_2-rhl8-branch&r1=1.1672.2.166.2.8.2.57&r2=1.1672.2.166.2.8.2.58
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/opt/emptyunion.C.diff?cvsroot=gcc&only_with_tag=gcc-3_2-rhl8-branch&r1=NONE&r2=1.1.8.1
^ permalink raw reply [flat|nested] 7+ messages in thread
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2003-06-02 5:04 [Bug optimization/11059] New: empty union optimization ice jelenz@students.wisc.edu
2003-06-02 5:10 ` [Bug optimization/11059] [3.3/3.4 regression] " pinskia@physics.uc.edu
2003-07-07 18:54 ` cvs-commit at gcc dot gnu dot org
2003-07-11 14:44 ` [Bug optimization/11059] [3.3 " pinskia at physics dot uc dot edu
2003-07-13 21:37 ` cvs-commit at gcc dot gnu dot org
2003-07-13 21:40 ` pinskia at physics dot uc dot edu
2003-07-16 11:42 ` cvs-commit at gcc dot gnu dot org
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