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* [Bug tree-optimization/16306] New: restrict and copying pointers problem
@ 2004-07-01 0:01 dann at godzilla dot ics dot uci dot edu
2004-07-01 1:35 ` [Bug tree-optimization/16306] [3.5 Regression] " pinskia at gcc dot gnu dot org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: dann at godzilla dot ics dot uci dot edu @ 2004-07-01 0:01 UTC (permalink / raw)
To: gcc-bugs
The current mainline does not optimize away the "link_error" call for this function:
void bar00 (int *a1, int *a2)
{
int * __restrict__ cpy_res1 = a1;
int * __restrict__ cpy_res2 = a2;
cpy_res1[0] = 1;
cpy_res2[0] = 1;
if (cpy_res1[0] != 1)
link_error ();
}
gcc-3.0 optimizes it.
What happens is that the dom1 pass replaces the uses of cpy_res[12] (which are
restricted pointers) with a[12] (which are not), so the RTL optimizers cannot
know that the "if" can be optimized away.
This issue might be sort of related to PR14187.
PR 14187
--
Summary: restrict and copying pointers problem
Product: gcc
Version: 3.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dann at godzilla dot ics dot uci dot edu
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16306
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/16306] [3.5 Regression] restrict and copying pointers problem
2004-07-01 0:01 [Bug tree-optimization/16306] New: restrict and copying pointers problem dann at godzilla dot ics dot uci dot edu
@ 2004-07-01 1:35 ` pinskia at gcc dot gnu dot org
2004-12-26 5:51 ` [Bug tree-optimization/16306] [4.0 " pinskia at gcc dot gnu dot org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-07-01 1:35 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-07-01 01:35 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Keywords| |missed-optimization
Known to fail| |3.5.0
Known to work| |3.4.0
Last reconfirmed|0000-00-00 00:00:00 |2004-07-01 01:35:29
date| |
Summary|restrict and copying |[3.5 Regression] restrict
|pointers problem |and copying pointers problem
Target Milestone|--- |3.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16306
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/16306] [4.0 Regression] restrict and copying pointers problem
2004-07-01 0:01 [Bug tree-optimization/16306] New: restrict and copying pointers problem dann at godzilla dot ics dot uci dot edu
2004-07-01 1:35 ` [Bug tree-optimization/16306] [3.5 Regression] " pinskia at gcc dot gnu dot org
@ 2004-12-26 5:51 ` pinskia at gcc dot gnu dot org
2005-04-21 5:06 ` [Bug tree-optimization/16306] [4.0/4.1 " mmitchel at gcc dot gnu dot org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-12-26 5:51 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-26 05:51 -------
First part to fix it: <http://gcc.gnu.org/ml/gcc-patches/2004-12/msg01931.html>, The next part is
because TER is getting in the way.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16306
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/16306] [4.0/4.1 Regression] restrict and copying pointers problem
2004-07-01 0:01 [Bug tree-optimization/16306] New: restrict and copying pointers problem dann at godzilla dot ics dot uci dot edu
2004-07-01 1:35 ` [Bug tree-optimization/16306] [3.5 Regression] " pinskia at gcc dot gnu dot org
2004-12-26 5:51 ` [Bug tree-optimization/16306] [4.0 " pinskia at gcc dot gnu dot org
@ 2005-04-21 5:06 ` mmitchel at gcc dot gnu dot org
2005-07-08 1:45 ` mmitchel at gcc dot gnu dot org
2005-09-27 16:25 ` mmitchel at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2005-04-21 5:06 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.0.0 |4.0.1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16306
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/16306] [4.0/4.1 Regression] restrict and copying pointers problem
2004-07-01 0:01 [Bug tree-optimization/16306] New: restrict and copying pointers problem dann at godzilla dot ics dot uci dot edu
` (2 preceding siblings ...)
2005-04-21 5:06 ` [Bug tree-optimization/16306] [4.0/4.1 " mmitchel at gcc dot gnu dot org
@ 2005-07-08 1:45 ` mmitchel at gcc dot gnu dot org
2005-09-27 16:25 ` mmitchel at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2005-07-08 1:45 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.0.1 |4.0.2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16306
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/16306] [4.0/4.1 Regression] restrict and copying pointers problem
2004-07-01 0:01 [Bug tree-optimization/16306] New: restrict and copying pointers problem dann at godzilla dot ics dot uci dot edu
` (3 preceding siblings ...)
2005-07-08 1:45 ` mmitchel at gcc dot gnu dot org
@ 2005-09-27 16:25 ` mmitchel at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2005-09-27 16:25 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.0.2 |4.0.3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16306
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2005-09-27 16:25 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2004-07-01 0:01 [Bug tree-optimization/16306] New: restrict and copying pointers problem dann at godzilla dot ics dot uci dot edu
2004-07-01 1:35 ` [Bug tree-optimization/16306] [3.5 Regression] " pinskia at gcc dot gnu dot org
2004-12-26 5:51 ` [Bug tree-optimization/16306] [4.0 " pinskia at gcc dot gnu dot org
2005-04-21 5:06 ` [Bug tree-optimization/16306] [4.0/4.1 " mmitchel at gcc dot gnu dot org
2005-07-08 1:45 ` mmitchel at gcc dot gnu dot org
2005-09-27 16:25 ` mmitchel at gcc dot gnu dot org
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