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* [Bug tree-optimization/15458] Combine ~ and ^.
[not found] <bug-15458-5009@http.gcc.gnu.org/bugzilla/>
@ 2005-11-30 17:32 ` pinskia at gcc dot gnu dot org
2005-11-30 17:41 ` pinskia at gcc dot gnu dot org
` (3 subsequent siblings)
4 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-11-30 17:32 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from pinskia at gcc dot gnu dot org 2005-11-30 17:32 -------
Actually it is better for ~(a ^ CST) to come out as a ^ ~CST.
Right now we actually already implement ~(a^CST) as a ^ ~CST. So we need just
to implement (~a) ^ CST as a ^ ~CST. In fact this is what simplify_rtx does.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15458
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15458] Combine ~ and ^.
[not found] <bug-15458-5009@http.gcc.gnu.org/bugzilla/>
2005-11-30 17:32 ` [Bug tree-optimization/15458] Combine ~ and ^ pinskia at gcc dot gnu dot org
@ 2005-11-30 17:41 ` pinskia at gcc dot gnu dot org
2005-12-04 4:27 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
4 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-11-30 17:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from pinskia at gcc dot gnu dot org 2005-11-30 17:41 -------
~(a^CST) is done in fold_unary with the comment of:
/* Convert ~(X ^ Y) to ~X ^ Y or X ^ ~Y if ~X or ~Y simplify. */
Only (~a^~b) is simplified. That can be expanded to:
(~a^b) if ~b simplifies, simplify the expression.
likewise for (a^~b) (if ~a simplifies, simplify the expression).
I am going to implement this.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |pinskia at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15458
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15458] Combine ~ and ^.
[not found] <bug-15458-5009@http.gcc.gnu.org/bugzilla/>
2005-11-30 17:32 ` [Bug tree-optimization/15458] Combine ~ and ^ pinskia at gcc dot gnu dot org
2005-11-30 17:41 ` pinskia at gcc dot gnu dot org
@ 2005-12-04 4:27 ` pinskia at gcc dot gnu dot org
2006-10-29 17:51 ` sayle at gcc dot gnu dot org
2006-10-29 20:27 ` pinskia at gcc dot gnu dot org
4 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-12-04 4:27 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from pinskia at gcc dot gnu dot org 2005-12-04 04:27 -------
I am no longer going to fix the fold issue, it is too much hasle to get this
fixed.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|pinskia at gcc dot gnu dot |unassigned at gcc dot gnu
|org |dot org
Status|ASSIGNED |NEW
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15458
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15458] Combine ~ and ^.
[not found] <bug-15458-5009@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2005-12-04 4:27 ` pinskia at gcc dot gnu dot org
@ 2006-10-29 17:51 ` sayle at gcc dot gnu dot org
2006-10-29 20:27 ` pinskia at gcc dot gnu dot org
4 siblings, 0 replies; 10+ messages in thread
From: sayle at gcc dot gnu dot org @ 2006-10-29 17:51 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from sayle at gcc dot gnu dot org 2006-10-29 17:51 -------
Subject: Bug 15458
Author: sayle
Date: Sun Oct 29 17:51:07 2006
New Revision: 118152
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=118152
Log:
PR tree-optimization/15458
* fold-const.c (fold_binary): Optimize ~X ^ C as X ^ ~C, where C
is a constant.
* gcc.dg/fold-xornot-1.c: New test case.
Added:
trunk/gcc/testsuite/gcc.dg/fold-xornot-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15458
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15458] Combine ~ and ^.
[not found] <bug-15458-5009@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2006-10-29 17:51 ` sayle at gcc dot gnu dot org
@ 2006-10-29 20:27 ` pinskia at gcc dot gnu dot org
4 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-10-29 20:27 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from pinskia at gcc dot gnu dot org 2006-10-29 20:27 -------
Fixed.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.3.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15458
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15458] Combine ~ and ^.
[not found] <bug-15458-4@http.gcc.gnu.org/bugzilla/>
@ 2014-10-31 4:02 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu.org @ 2014-10-31 4:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15458
Bug 15458 depends on bug 15459, which changed state.
Bug 15459 Summary: [meta-bug] there should be a tree combiner like the rtl one
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15459
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15458] Combine ~ and ^.
2004-05-16 1:55 [Bug tree-optimization/15458] New: " kazu at cs dot umass dot edu
` (2 preceding siblings ...)
2004-05-17 18:53 ` pinskia at gcc dot gnu dot org
@ 2004-06-02 21:14 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-02 21:14 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-02 21:14 -------
I should note that the RTL level does this optimization.
--
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |15785
Keywords| |TREE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15458
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15458] Combine ~ and ^.
2004-05-16 1:55 [Bug tree-optimization/15458] New: " kazu at cs dot umass dot edu
2004-05-16 10:02 ` [Bug tree-optimization/15458] " pinskia at gcc dot gnu dot org
2004-05-16 10:49 ` pinskia at gcc dot gnu dot org
@ 2004-05-17 18:53 ` pinskia at gcc dot gnu dot org
2004-06-02 21:14 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-05-17 18:53 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-05-17 02:05 -------
Will be fix by PR 15459 when fold is able to optimize ~(a<D1109>_1 ^ 65535) into
~a<D1104>_1 ^ 65535
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15458
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15458] Combine ~ and ^.
2004-05-16 1:55 [Bug tree-optimization/15458] New: " kazu at cs dot umass dot edu
2004-05-16 10:02 ` [Bug tree-optimization/15458] " pinskia at gcc dot gnu dot org
@ 2004-05-16 10:49 ` pinskia at gcc dot gnu dot org
2004-05-17 18:53 ` pinskia at gcc dot gnu dot org
2004-06-02 21:14 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-05-16 10:49 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |15459
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15458
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15458] Combine ~ and ^.
2004-05-16 1:55 [Bug tree-optimization/15458] New: " kazu at cs dot umass dot edu
@ 2004-05-16 10:02 ` pinskia at gcc dot gnu dot org
2004-05-16 10:49 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-05-16 10:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-05-15 12:23 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-05-15 12:23:00
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15458
^ permalink raw reply [flat|nested] 10+ messages in thread
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[not found] <bug-15458-5009@http.gcc.gnu.org/bugzilla/>
2005-11-30 17:32 ` [Bug tree-optimization/15458] Combine ~ and ^ pinskia at gcc dot gnu dot org
2005-11-30 17:41 ` pinskia at gcc dot gnu dot org
2005-12-04 4:27 ` pinskia at gcc dot gnu dot org
2006-10-29 17:51 ` sayle at gcc dot gnu dot org
2006-10-29 20:27 ` pinskia at gcc dot gnu dot org
[not found] <bug-15458-4@http.gcc.gnu.org/bugzilla/>
2014-10-31 4:02 ` pinskia at gcc dot gnu.org
2004-05-16 1:55 [Bug tree-optimization/15458] New: " kazu at cs dot umass dot edu
2004-05-16 10:02 ` [Bug tree-optimization/15458] " pinskia at gcc dot gnu dot org
2004-05-16 10:49 ` pinskia at gcc dot gnu dot org
2004-05-17 18:53 ` pinskia at gcc dot gnu dot org
2004-06-02 21:14 ` pinskia at gcc dot gnu dot org
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