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* [Bug tree-optimization/45120] New: [4.6 Regression] -fipa-pta causes FAIL: gcc.c-torture/execute/pta-field-2.c execution
@ 2010-07-29 1:00 zsojka at seznam dot cz
2010-07-29 10:02 ` [Bug tree-optimization/45120] " rguenth at gcc dot gnu dot org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: zsojka at seznam dot cz @ 2010-07-29 1:00 UTC (permalink / raw)
To: gcc-bugs
With -fipa-pta in flags, pta-field-2.c FAILs:
FAIL: gcc.c-torture/execute/pta-field-2.c execution, -O2
FAIL: gcc.c-torture/execute/pta-field-2.c execution, -O3 -fomit-frame-pointer
FAIL: gcc.c-torture/execute/pta-field-2.c execution, -O3 -g
FAIL: gcc.c-torture/execute/pta-field-2.c execution, -Os
FAIL: gcc.c-torture/execute/pta-field-2.c execution, -O2 -flto
Command line:
$ gcc -O2 -fipa-pta pta-field-2.i
$ ./a.out
Aborted
The code might be undefined, but even -fno-strict-aliasing doesn't help:
$ gcc -O2 -fipa-pta pta-field-2.i -fno-strict-aliasing
$ ./a.out
Aborted
Tested revisions:
r162653 - fail
r161659 - fail
r161170 - OK
--
Summary: [4.6 Regression] -fipa-pta causes FAIL: gcc.c-
torture/execute/pta-field-2.c execution
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: zsojka at seznam dot cz
GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45120
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/45120] [4.6 Regression] -fipa-pta causes FAIL: gcc.c-torture/execute/pta-field-2.c execution
2010-07-29 1:00 [Bug tree-optimization/45120] New: [4.6 Regression] -fipa-pta causes FAIL: gcc.c-torture/execute/pta-field-2.c execution zsojka at seznam dot cz
@ 2010-07-29 10:02 ` rguenth at gcc dot gnu dot org
2010-07-29 12:31 ` rguenth at gcc dot gnu dot org
2010-07-29 12:31 ` rguenth at gcc dot gnu dot org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-07-29 10:02 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from rguenth at gcc dot gnu dot org 2010-07-29 10:01 -------
Confirmed, mine.
We generate wrong constraints for
bar (int * * x)
{
int * D.2737;
<bb 2>:
D.2737_3 = MEM[(struct Foo *)x_1(D) + -8B].p;
*D.2737_3 = 0;
return;
}
Generating constraints for bar (bar)
bar.arg0 = &NONLOCAL
D.2737_3 = *bar.arg0
bar.use = bar.arg0
bar.clobber = D.2737_3
I have a patch.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot
|dot org |org
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2010-07-29 10:01:51
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45120
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/45120] [4.6 Regression] -fipa-pta causes FAIL: gcc.c-torture/execute/pta-field-2.c execution
2010-07-29 1:00 [Bug tree-optimization/45120] New: [4.6 Regression] -fipa-pta causes FAIL: gcc.c-torture/execute/pta-field-2.c execution zsojka at seznam dot cz
2010-07-29 10:02 ` [Bug tree-optimization/45120] " rguenth at gcc dot gnu dot org
2010-07-29 12:31 ` rguenth at gcc dot gnu dot org
@ 2010-07-29 12:31 ` rguenth at gcc dot gnu dot org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-07-29 12:31 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from rguenth at gcc dot gnu dot org 2010-07-29 12:30 -------
Subject: Bug 45120
Author: rguenth
Date: Thu Jul 29 12:30:09 2010
New Revision: 162676
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=162676
Log:
2010-07-29 Richard Guenther <rguenther@suse.de>
PR tree-optimization/45120
* tree-ssa-structalias.c (get_constraint_for_component_ref):
Handle offset in DEREFs properly.
(get_constraint_for_1): Handle MEM_REF offset properly.
* gcc.dg/ipa/ipa-pta-15.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/ipa/ipa-pta-15.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-structalias.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45120
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/45120] [4.6 Regression] -fipa-pta causes FAIL: gcc.c-torture/execute/pta-field-2.c execution
2010-07-29 1:00 [Bug tree-optimization/45120] New: [4.6 Regression] -fipa-pta causes FAIL: gcc.c-torture/execute/pta-field-2.c execution zsojka at seznam dot cz
2010-07-29 10:02 ` [Bug tree-optimization/45120] " rguenth at gcc dot gnu dot org
@ 2010-07-29 12:31 ` rguenth at gcc dot gnu dot org
2010-07-29 12:31 ` rguenth at gcc dot gnu dot org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-07-29 12:31 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from rguenth at gcc dot gnu dot org 2010-07-29 12:31 -------
Fixed.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.6.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45120
^ permalink raw reply [flat|nested] 4+ messages in thread
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2010-07-29 1:00 [Bug tree-optimization/45120] New: [4.6 Regression] -fipa-pta causes FAIL: gcc.c-torture/execute/pta-field-2.c execution zsojka at seznam dot cz
2010-07-29 10:02 ` [Bug tree-optimization/45120] " rguenth at gcc dot gnu dot org
2010-07-29 12:31 ` rguenth at gcc dot gnu dot org
2010-07-29 12:31 ` rguenth at gcc dot gnu dot org
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