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* [Bug tree-optimization/44913] [4.6 Regression] -ftree-vectorize causes FAIL: gcc.dg/pr44838.c execution test
[not found] <bug-44913-4@http.gcc.gnu.org/bugzilla/>
@ 2010-10-14 10:38 ` rguenth at gcc dot gnu.org
2010-10-14 15:52 ` rguenth at gcc dot gnu.org
2010-10-14 15:55 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2010-10-14 10:38 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44913
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
AssignedTo|unassigned at gcc dot |rguenth at gcc dot gnu.org
|gnu.org |
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-14 10:38:45 UTC ---
Mine.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/44913] [4.6 Regression] -ftree-vectorize causes FAIL: gcc.dg/pr44838.c execution test
[not found] <bug-44913-4@http.gcc.gnu.org/bugzilla/>
2010-10-14 10:38 ` [Bug tree-optimization/44913] [4.6 Regression] -ftree-vectorize causes FAIL: gcc.dg/pr44838.c execution test rguenth at gcc dot gnu.org
@ 2010-10-14 15:52 ` rguenth at gcc dot gnu.org
2010-10-14 15:55 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2010-10-14 15:52 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44913
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-14 15:51:22 UTC ---
Author: rguenth
Date: Thu Oct 14 15:51:15 2010
New Revision: 165473
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=165473
Log:
2010-10-14 Richard Guenther <rguenther@suse.de>
PR tree-optimization/44913
* tree-data-ref.c (disjoint_objects_p): Remove.
(dr_may_alias_p): Simplify. Only hand the base object to
the alias-oracle.
* tree-ssa-alias.c (ptr_deref_may_alias_decl_p): Handle
some more trees, bail out instead of asserting.
(ptr_derefs_may_alias_p): Likewise. Export.
(refs_may_alias_p_1): Handle STRING_CSTs.
* tree-ssa-alias.h (ptr_derefs_may_alias_p): Declare.
* gcc.dg/torture/pr44913.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr44913.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-data-ref.c
trunk/gcc/tree-ssa-alias.c
trunk/gcc/tree-ssa-alias.h
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/44913] [4.6 Regression] -ftree-vectorize causes FAIL: gcc.dg/pr44838.c execution test
[not found] <bug-44913-4@http.gcc.gnu.org/bugzilla/>
2010-10-14 10:38 ` [Bug tree-optimization/44913] [4.6 Regression] -ftree-vectorize causes FAIL: gcc.dg/pr44838.c execution test rguenth at gcc dot gnu.org
2010-10-14 15:52 ` rguenth at gcc dot gnu.org
@ 2010-10-14 15:55 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2010-10-14 15:55 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44913
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-14 15:55:34 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/44913] [4.6 Regression] -ftree-vectorize causes FAIL: gcc.dg/pr44838.c execution test
2010-07-11 19:40 [Bug tree-optimization/44913] New: " zsojka at seznam dot cz
` (2 preceding siblings ...)
2010-07-23 12:35 ` rguenth at gcc dot gnu dot org
@ 2010-08-23 9:29 ` jakub at gcc dot gnu dot org
3 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu dot org @ 2010-08-23 9:29 UTC (permalink / raw)
To: gcc-bugs
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44913
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/44913] [4.6 Regression] -ftree-vectorize causes FAIL: gcc.dg/pr44838.c execution test
2010-07-11 19:40 [Bug tree-optimization/44913] New: " zsojka at seznam dot cz
2010-07-11 21:58 ` [Bug tree-optimization/44913] " rguenth at gcc dot gnu dot org
2010-07-11 23:11 ` hjl dot tools at gmail dot com
@ 2010-07-23 12:35 ` rguenth at gcc dot gnu dot org
2010-08-23 9:29 ` jakub at gcc dot gnu dot org
3 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-07-23 12:35 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from rguenth at gcc dot gnu dot org 2010-07-23 12:35 -------
Confirmed. We end up vectorizing
void
foo (int *a, int n)
{
int *lasta = a + n;
for (; a != lasta; a++)
{
*a *= 2;
a[1] = a[-1] + a[-2];
}
}
not seeing the dependence of *a vs a[-1] because via
initialize_data_dependence_relation we ask the alias-oracle whether
*a may alias a[-1] (which it doesn't). So we end up not computing
a dependence distance.
May we not use the alias-oracle (on the full ref) here?
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |spop at gcc dot gnu dot org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2010-07-23 12:35:43
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44913
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/44913] [4.6 Regression] -ftree-vectorize causes FAIL: gcc.dg/pr44838.c execution test
2010-07-11 19:40 [Bug tree-optimization/44913] New: " zsojka at seznam dot cz
2010-07-11 21:58 ` [Bug tree-optimization/44913] " rguenth at gcc dot gnu dot org
@ 2010-07-11 23:11 ` hjl dot tools at gmail dot com
2010-07-23 12:35 ` rguenth at gcc dot gnu dot org
2010-08-23 9:29 ` jakub at gcc dot gnu dot org
3 siblings, 0 replies; 7+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-07-11 23:11 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from hjl dot tools at gmail dot com 2010-07-11 23:11 -------
This is caused by revision 161655:
http://gcc.gnu.org/ml/gcc-cvs/2010-07/msg00006.html
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44913
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/44913] [4.6 Regression] -ftree-vectorize causes FAIL: gcc.dg/pr44838.c execution test
2010-07-11 19:40 [Bug tree-optimization/44913] New: " zsojka at seznam dot cz
@ 2010-07-11 21:58 ` rguenth at gcc dot gnu dot org
2010-07-11 23:11 ` hjl dot tools at gmail dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-07-11 21:58 UTC (permalink / raw)
To: gcc-bugs
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target Milestone|--- |4.6.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44913
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2010-10-14 15:55 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-44913-4@http.gcc.gnu.org/bugzilla/>
2010-10-14 10:38 ` [Bug tree-optimization/44913] [4.6 Regression] -ftree-vectorize causes FAIL: gcc.dg/pr44838.c execution test rguenth at gcc dot gnu.org
2010-10-14 15:52 ` rguenth at gcc dot gnu.org
2010-10-14 15:55 ` rguenth at gcc dot gnu.org
2010-07-11 19:40 [Bug tree-optimization/44913] New: " zsojka at seznam dot cz
2010-07-11 21:58 ` [Bug tree-optimization/44913] " rguenth at gcc dot gnu dot org
2010-07-11 23:11 ` hjl dot tools at gmail dot com
2010-07-23 12:35 ` rguenth at gcc dot gnu dot org
2010-08-23 9:29 ` jakub at gcc dot gnu dot org
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