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* [Bug tree-optimization/26135] New: store copyprop not effective
@ 2006-02-06 17:36 rguenth at gcc dot gnu dot org
2006-02-06 17:36 ` [Bug tree-optimization/26135] " rguenth at gcc dot gnu dot org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2006-02-06 17:36 UTC (permalink / raw)
To: gcc-bugs
For (-O2 -fno-tree-dominator-opts -fno-tree-salias -fno-tree-sra)
int foo(int i)
{
struct { int i; int j; } a;
a.i = i;
return a.i;
}
store copyprop does not propagate i to the return stmt.
--
Summary: store copyprop not effective
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rguenth at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26135
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/26135] store copyprop not effective
2006-02-06 17:36 [Bug tree-optimization/26135] New: store copyprop not effective rguenth at gcc dot gnu dot org
@ 2006-02-06 17:36 ` rguenth at gcc dot gnu dot org
2006-02-07 15:46 ` rguenth at gcc dot gnu dot org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2006-02-06 17:36 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from rguenth at gcc dot gnu dot org 2006-02-06 17:36 -------
And I have a patch.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dnovillo at redhat dot com
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 |2006-02-06 17:36:39
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26135
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/26135] store copyprop not effective
2006-02-06 17:36 [Bug tree-optimization/26135] New: store copyprop not effective rguenth at gcc dot gnu dot org
2006-02-06 17:36 ` [Bug tree-optimization/26135] " rguenth at gcc dot gnu dot org
@ 2006-02-07 15:46 ` rguenth at gcc dot gnu dot org
2006-02-07 16:35 ` steven at gcc dot gnu dot org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2006-02-07 15:46 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from rguenth at gcc dot gnu dot org 2006-02-07 15:46 -------
Patch posted. As DOM nearly handles all store copyprop I wonder if (this late)
store copyprop is worth it. If not going to copyprop on steroids which I'm
going to clean up again and re-submit.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |http://gcc.gnu.org/ml/gcc-
| |patches/2006-
| |02/msg00559.html
Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26135
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/26135] store copyprop not effective
2006-02-06 17:36 [Bug tree-optimization/26135] New: store copyprop not effective rguenth at gcc dot gnu dot org
2006-02-06 17:36 ` [Bug tree-optimization/26135] " rguenth at gcc dot gnu dot org
2006-02-07 15:46 ` rguenth at gcc dot gnu dot org
@ 2006-02-07 16:35 ` steven at gcc dot gnu dot org
2006-02-08 13:18 ` rguenth at gcc dot gnu dot org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: steven at gcc dot gnu dot org @ 2006-02-07 16:35 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from steven at gcc dot gnu dot org 2006-02-07 16:35 -------
In fact DOM should probably not be doing store copyprop, and store copyprop is
simply broken. It never worked quite the way it should, so if you want to
implement a better one, great!
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26135
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/26135] store copyprop not effective
2006-02-06 17:36 [Bug tree-optimization/26135] New: store copyprop not effective rguenth at gcc dot gnu dot org
` (2 preceding siblings ...)
2006-02-07 16:35 ` steven at gcc dot gnu dot org
@ 2006-02-08 13:18 ` rguenth at gcc dot gnu dot org
2006-04-07 8:04 ` rguenth at gcc dot gnu dot org
2006-04-07 8:05 ` rguenth at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2006-02-08 13:18 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from rguenth at gcc dot gnu dot org 2006-02-08 13:18 -------
And the alternative store copyprop implementation was posted here:
http://gcc.gnu.org/ml/gcc-patches/2006-02/msg00669.html
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26135
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/26135] store copyprop not effective
2006-02-06 17:36 [Bug tree-optimization/26135] New: store copyprop not effective rguenth at gcc dot gnu dot org
` (3 preceding siblings ...)
2006-02-08 13:18 ` rguenth at gcc dot gnu dot org
@ 2006-04-07 8:04 ` rguenth at gcc dot gnu dot org
2006-04-07 8:05 ` rguenth at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2006-04-07 8:04 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from rguenth at gcc dot gnu dot org 2006-04-07 08:04 -------
Subject: Bug 26135
Author: rguenth
Date: Fri Apr 7 08:04:26 2006
New Revision: 112749
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=112749
Log:
2006-04-07 Richard Guenther <rguenther@suse.de>
PR tree-optimization/26135
* tree-ssa-copy.c (stmt_may_generate_copy): Handle memory
loads for store copy-prop.
(copy_prop_visit_stmt): Likewise.
* gcc.dg/tree-ssa/ssa-copyprop-1.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-copyprop-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-copy.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26135
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/26135] store copyprop not effective
2006-02-06 17:36 [Bug tree-optimization/26135] New: store copyprop not effective rguenth at gcc dot gnu dot org
` (4 preceding siblings ...)
2006-04-07 8:04 ` rguenth at gcc dot gnu dot org
@ 2006-04-07 8:05 ` rguenth at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2006-04-07 8:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from rguenth at gcc dot gnu dot org 2006-04-07 08:05 -------
Fixed.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.2.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26135
^ permalink raw reply [flat|nested] 7+ messages in thread
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2006-02-06 17:36 [Bug tree-optimization/26135] New: store copyprop not effective rguenth at gcc dot gnu dot org
2006-02-06 17:36 ` [Bug tree-optimization/26135] " rguenth at gcc dot gnu dot org
2006-02-07 15:46 ` rguenth at gcc dot gnu dot org
2006-02-07 16:35 ` steven at gcc dot gnu dot org
2006-02-08 13:18 ` rguenth at gcc dot gnu dot org
2006-04-07 8:04 ` rguenth at gcc dot gnu dot org
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