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* [Bug middle-end/23670] Fold does not fold (a|b)&b to b likewise for (a&b) | b to b
2005-09-01 2:15 [Bug middle-end/23670] New: Fold does not fold (a|b)&b to b likewise for (a&b) | b to b pinskia at gcc dot gnu dot org
@ 2005-09-01 2:15 ` pinskia at gcc dot gnu dot org
2005-09-17 2:12 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-01 2:15 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-01 02:15 -------
Oh, this was from LLVM again.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23670
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/23670] New: Fold does not fold (a|b)&b to b likewise for (a&b) | b to b
@ 2005-09-01 2:15 pinskia at gcc dot gnu dot org
2005-09-01 2:15 ` [Bug middle-end/23670] " pinskia at gcc dot gnu dot org
2005-09-17 2:12 ` pinskia at gcc dot gnu dot org
0 siblings, 2 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-01 2:15 UTC (permalink / raw)
To: gcc-bugs
Example:
int f(int a, int b)
{
return (a|9)&9;
}
int f1(int a, int b)
{
return (a|9)&9;
}
This is folded at the rtl level but not at the tree level.
--
Summary: Fold does not fold (a|b)&b to b likewise for (a&b) | b
to b
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Keywords: missed-optimization, TREE
Severity: enhancement
Priority: P2
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pinskia at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
OtherBugsDependingO 19986
nThis:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23670
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/23670] Fold does not fold (a|b)&b to b likewise for (a&b) | b to b
2005-09-01 2:15 [Bug middle-end/23670] New: Fold does not fold (a|b)&b to b likewise for (a&b) | b to b pinskia at gcc dot gnu dot org
2005-09-01 2:15 ` [Bug middle-end/23670] " pinskia at gcc dot gnu dot org
@ 2005-09-17 2:12 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-17 2:12 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-17 02:12 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2005-09-17 02:12:28
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23670
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/23670] Fold does not fold (a|b)&b to b likewise for (a&b) | b to b
[not found] <bug-23670-6528@http.gcc.gnu.org/bugzilla/>
2006-02-14 21:08 ` sayle at gcc dot gnu dot org
@ 2006-02-14 23:26 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-02-14 23:26 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from pinskia at gcc dot gnu dot org 2006-02-14 23:26 -------
Fixed, thanks Roger for fixing this one.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.2.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23670
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/23670] Fold does not fold (a|b)&b to b likewise for (a&b) | b to b
[not found] <bug-23670-6528@http.gcc.gnu.org/bugzilla/>
@ 2006-02-14 21:08 ` sayle at gcc dot gnu dot org
2006-02-14 23:26 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 5+ messages in thread
From: sayle at gcc dot gnu dot org @ 2006-02-14 21:08 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from sayle at gcc dot gnu dot org 2006-02-14 21:08 -------
Subject: Bug 23670
Author: sayle
Date: Tue Feb 14 21:08:52 2006
New Revision: 110997
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=110997
Log:
PR middle-end/23670
* fold-const.c (fold_binary) <BIT_IOR_EXPR>: Optimize (X&Y)|Y into
(X,Y) and the corresponding symmetry related transformations.
(fold_binary) <BIT_AND_EXPR>: Likewise, optimize (X|Y)&Y into
(X,Y) and its symmetry related transformations.
* gcc.dg/tree-ssa/andor-2.c: New test case.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/andor-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23670
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2006-02-14 23:26 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2005-09-01 2:15 [Bug middle-end/23670] New: Fold does not fold (a|b)&b to b likewise for (a&b) | b to b pinskia at gcc dot gnu dot org
2005-09-01 2:15 ` [Bug middle-end/23670] " pinskia at gcc dot gnu dot org
2005-09-17 2:12 ` pinskia at gcc dot gnu dot org
[not found] <bug-23670-6528@http.gcc.gnu.org/bugzilla/>
2006-02-14 21:08 ` sayle at gcc dot gnu dot org
2006-02-14 23:26 ` pinskia at gcc dot gnu dot org
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