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* [Bug middle-end/25977] miscompile with classes without copy constructor
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
@ 2006-01-26 15:40 ` mueller at gcc dot gnu dot org
2006-01-26 15:45 ` pinskia at gcc dot gnu dot org
` (10 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: mueller at gcc dot gnu dot org @ 2006-01-26 15:40 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from mueller at gcc dot gnu dot org 2006-01-26 15:40 -------
Created an attachment (id=10734)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10734&action=view)
testcase
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] New: miscompile with classes without copy constructor
@ 2006-01-26 15:40 mueller at gcc dot gnu dot org
2006-01-26 15:40 ` [Bug middle-end/25977] " mueller at gcc dot gnu dot org
` (11 more replies)
0 siblings, 12 replies; 13+ messages in thread
From: mueller at gcc dot gnu dot org @ 2006-01-26 15:40 UTC (permalink / raw)
To: gcc-bugs
Hmm, the summary is really bad. I'm seeing the attached testcase to fail on
4.2.0 and 4.1.0, both with -O0 and with -O2.
--
Summary: miscompile with classes without copy constructor
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: mueller at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] miscompile with classes without copy constructor
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
2006-01-26 15:40 ` [Bug middle-end/25977] " mueller at gcc dot gnu dot org
@ 2006-01-26 15:45 ` pinskia at gcc dot gnu dot org
2006-01-26 15:48 ` [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice) pinskia at gcc dot gnu dot org
` (9 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-01-26 15:45 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from pinskia at gcc dot gnu dot org 2006-01-26 15:45 -------
<retval> = operator& (&<retval>, &r) [return slot optimization];
We cannot do RSO here.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice)
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
2006-01-26 15:40 ` [Bug middle-end/25977] " mueller at gcc dot gnu dot org
2006-01-26 15:45 ` pinskia at gcc dot gnu dot org
@ 2006-01-26 15:48 ` pinskia at gcc dot gnu dot org
2006-01-26 15:50 ` pinskia at gcc dot gnu dot org
` (8 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-01-26 15:48 UTC (permalink / raw)
To: gcc-bugs
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org, mmitchel at gcc dot gnu
| |dot org
Severity|normal |critical
Known to fail| |4.1.0 4.2.0
Known to work| |3.4.0
Summary|RSO vs NRV (twice) |[4.1/4.2 Regression] RSO vs
| |NRV (twice)
Target Milestone|--- |4.1.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice)
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
` (2 preceding siblings ...)
2006-01-26 15:48 ` [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice) pinskia at gcc dot gnu dot org
@ 2006-01-26 15:50 ` pinskia at gcc dot gnu dot org
2006-01-26 15:54 ` pinskia at gcc dot gnu dot org
` (7 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-01-26 15:50 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from pinskia at gcc dot gnu dot org 2006-01-26 15:50 -------
Confirmed. Very much related to PR 19317 so CCing Jason.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu dot org
BugsThisDependsOn| |19317
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Known to work|3.4.0 |3.4.0 4.0.3
Last reconfirmed|0000-00-00 00:00:00 |2006-01-26 15:50:23
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice)
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
` (3 preceding siblings ...)
2006-01-26 15:50 ` pinskia at gcc dot gnu dot org
@ 2006-01-26 15:54 ` pinskia at gcc dot gnu dot org
2006-01-26 17:36 ` pinskia at gcc dot gnu dot org
` (6 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-01-26 15:54 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from pinskia at gcc dot gnu dot org 2006-01-26 15:54 -------
Hmm:
(void) (<retval> = *(struct A &) (struct A *) &TARGET_EXPR <D.1827, operator&
(&<retval>, (struct A &) (struct A *) &r)>) >>>
>>;
Maybe it is not fully related to PR 19317 but a different issue really.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice)
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
` (4 preceding siblings ...)
2006-01-26 15:54 ` pinskia at gcc dot gnu dot org
@ 2006-01-26 17:36 ` pinskia at gcc dot gnu dot org
2006-01-27 16:50 ` jason at gcc dot gnu dot org
` (5 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-01-26 17:36 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from pinskia at gcc dot gnu dot org 2006-01-26 17:36 -------
*** Bug 25979 has been marked as a duplicate of this bug. ***
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hhinnant at apple dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice)
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
` (5 preceding siblings ...)
2006-01-26 17:36 ` pinskia at gcc dot gnu dot org
@ 2006-01-27 16:50 ` jason at gcc dot gnu dot org
2006-02-01 3:01 ` mmitchel at gcc dot gnu dot org
` (4 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: jason at gcc dot gnu dot org @ 2006-01-27 16:50 UTC (permalink / raw)
To: gcc-bugs
--
jason at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |jason at gcc dot gnu dot org
|dot org |
Status|NEW |ASSIGNED
Last reconfirmed|2006-01-26 15:50:23 |2006-01-27 16:50:08
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice)
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
` (6 preceding siblings ...)
2006-01-27 16:50 ` jason at gcc dot gnu dot org
@ 2006-02-01 3:01 ` mmitchel at gcc dot gnu dot org
2006-02-03 21:56 ` jason at gcc dot gnu dot org
` (3 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2006-02-01 3:01 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from mmitchel at gcc dot gnu dot org 2006-02-01 03:01 -------
Jason, do you have an ETA on a fix?
--
mmitchel at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice)
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
` (7 preceding siblings ...)
2006-02-01 3:01 ` mmitchel at gcc dot gnu dot org
@ 2006-02-03 21:56 ` jason at gcc dot gnu dot org
2006-02-03 21:57 ` jason at gcc dot gnu dot org
` (2 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: jason at gcc dot gnu dot org @ 2006-02-03 21:56 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from jason at gcc dot gnu dot org 2006-02-03 21:56 -------
Subject: Bug 25977
Author: jason
Date: Fri Feb 3 21:56:03 2006
New Revision: 110564
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=110564
Log:
PR c++/25979
* gimplify.c (gimplify_modify_expr_rhs): Disable *& optimization for
now.
PR middle-end/25977
* gimplify.c (gimplify_modify_expr_rhs): It's not always safe to do RVO
on the return slot if it's an NRV.
Added:
branches/gcc-4_1-branch/gcc/testsuite/g++.dg/opt/nrv10.C
branches/gcc-4_1-branch/gcc/testsuite/g++.dg/opt/nrv11.C
Modified:
branches/gcc-4_1-branch/gcc/ChangeLog
branches/gcc-4_1-branch/gcc/gimplify.c
branches/gcc-4_1-branch/gcc/testsuite/g++.dg/opt/temp1.C
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice)
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
` (8 preceding siblings ...)
2006-02-03 21:56 ` jason at gcc dot gnu dot org
@ 2006-02-03 21:57 ` jason at gcc dot gnu dot org
2006-02-03 21:58 ` jason at gcc dot gnu dot org
2006-02-05 9:48 ` jakub at gcc dot gnu dot org
11 siblings, 0 replies; 13+ messages in thread
From: jason at gcc dot gnu dot org @ 2006-02-03 21:57 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from jason at gcc dot gnu dot org 2006-02-03 21:57 -------
Subject: Bug 25977
Author: jason
Date: Fri Feb 3 21:57:08 2006
New Revision: 110565
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=110565
Log:
PR c++/25979
* gimplify.c (gimplify_modify_expr_rhs): Disable *& optimization for
now.
PR middle-end/25977
* gimplify.c (gimplify_modify_expr_rhs): It's not always safe to do RVO
on the return slot if it's an NRV.
Added:
trunk/gcc/testsuite/g++.dg/opt/nrv10.C
trunk/gcc/testsuite/g++.dg/opt/nrv11.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/gcc/testsuite/g++.dg/opt/temp1.C
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice)
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
` (9 preceding siblings ...)
2006-02-03 21:57 ` jason at gcc dot gnu dot org
@ 2006-02-03 21:58 ` jason at gcc dot gnu dot org
2006-02-05 9:48 ` jakub at gcc dot gnu dot org
11 siblings, 0 replies; 13+ messages in thread
From: jason at gcc dot gnu dot org @ 2006-02-03 21:58 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from jason at gcc dot gnu dot org 2006-02-03 21:57 -------
Fixed.
--
jason at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to fail|4.1.0 4.2.0 |
Known to work|3.4.0 4.0.3 |3.4.0 4.0.3 4.1.0 4.2.0
Priority|P1 |P3
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice)
2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
` (10 preceding siblings ...)
2006-02-03 21:58 ` jason at gcc dot gnu dot org
@ 2006-02-05 9:48 ` jakub at gcc dot gnu dot org
11 siblings, 0 replies; 13+ messages in thread
From: jakub at gcc dot gnu dot org @ 2006-02-05 9:48 UTC (permalink / raw)
To: gcc-bugs
------- Comment #10 from jakub at gcc dot gnu dot org 2006-02-05 09:48 -------
This patch introduces a regression
FAIL: g++.dg/opt/complex5.C (test for excess errors)
ICE on at least {i686,s390,s390x}-linux on gcc-4_1-branch in dom2 pass (with
-O2).
At copyrename2 the function is:
double __complex__ elt_zero() ()
{
doubleD.28 CR.13D.1769;
doubleD.28 D.1768;
doubleD.28 CI.12D.1767;
doubleD.28 CR.11D.1766;
doubleD.28 rD.1754;
cdoubleD.1733 zD.1755;
cdoubleD.1733 aD.1741;
complex doubleD.32 D.1745;
complex doubleD.32 a.0D.1744;
complex doubleD.32 D.1743;
# BLOCK 0 freq:10000
# PRED: ENTRY [100.0%] (fallthru,exec)
REALPART_EXPR <D.1743_2> = 0.0;
CR.13D.1769_8 = CR.11D.1766_5 + 1.0e+0;
D.1745_6 = COMPLEX_EXPR <CR.13D.1769_8, CI.12D.1767_4>;
CR.13D.1769_1 = CR.13D.1769_8;
# <retval>_9 = V_MAY_DEF <<retval>_3>;
REALPART_EXPR <<retval>> = CR.13D.1769_1;
# <retval>_10 = V_MAY_DEF <<retval>_9>;
IMAGPART_EXPR <<retval>> = 0.0;
# VUSE <<retval>_10>;
return <retval>;
# SUCC: EXIT [100.0%]
}
In simple_iv_increment_p
1738 phi = SSA_NAME_DEF_STMT (preinc);
1739 if (TREE_CODE (phi) != PHI_NODE)
1740 return false;
phi is NULL. preinc is:
CR.11D.1761_5
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu dot
| |org, dnovillo at gcc dot gnu
| |dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977
^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2006-02-05 9:48 UTC | newest]
Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
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2006-01-26 15:40 [Bug middle-end/25977] New: miscompile with classes without copy constructor mueller at gcc dot gnu dot org
2006-01-26 15:40 ` [Bug middle-end/25977] " mueller at gcc dot gnu dot org
2006-01-26 15:45 ` pinskia at gcc dot gnu dot org
2006-01-26 15:48 ` [Bug middle-end/25977] [4.1/4.2 Regression] RSO vs NRV (twice) pinskia at gcc dot gnu dot org
2006-01-26 15:50 ` pinskia at gcc dot gnu dot org
2006-01-26 15:54 ` pinskia at gcc dot gnu dot org
2006-01-26 17:36 ` pinskia at gcc dot gnu dot org
2006-01-27 16:50 ` jason at gcc dot gnu dot org
2006-02-01 3:01 ` mmitchel at gcc dot gnu dot org
2006-02-03 21:56 ` jason at gcc dot gnu dot org
2006-02-03 21:57 ` jason at gcc dot gnu dot org
2006-02-03 21:58 ` jason at gcc dot gnu dot org
2006-02-05 9:48 ` jakub at gcc dot gnu dot org
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