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* [Bug tree-optimization/15784] New: fold misses bitwise optimization
@ 2004-06-02 20:45 pinskia at gcc dot gnu dot org
2004-06-02 21:14 ` [Bug tree-optimization/15784] fold misses binary optimization pinskia at gcc dot gnu dot org
` (23 more replies)
0 siblings, 24 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-02 20:45 UTC (permalink / raw)
To: gcc-bugs
int f(int x)
{
return x & ~x; // should be 0 before getting to the RTL level
}
int h(int x)
{
return x | ~x; // should be -1 before getting to the RTL level
}
--
Summary: fold misses bitwise optimization
Product: gcc
Version: 3.5.0
Status: UNCONFIRMED
Keywords: missed-optimization, TREE
Severity: enhancement
Priority: P2
Component: tree-optimization
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
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
@ 2004-06-02 21:14 ` pinskia at gcc dot gnu dot org
2004-06-02 21:22 ` pinskia at gcc dot gnu dot org
` (22 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-02 21:14 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Summary|fold misses bitwise |fold misses binary
|optimization |optimization
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
2004-06-02 21:14 ` [Bug tree-optimization/15784] fold misses binary optimization pinskia at gcc dot gnu dot org
@ 2004-06-02 21:22 ` pinskia at gcc dot gnu dot org
2004-06-02 21:24 ` pinskia at gcc dot gnu dot org
` (21 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-02 21:22 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-02 21:22 -------
int f(int x)
{
return ~x + 1; // -x
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
2004-06-02 21:14 ` [Bug tree-optimization/15784] fold misses binary optimization pinskia at gcc dot gnu dot org
2004-06-02 21:22 ` pinskia at gcc dot gnu dot org
@ 2004-06-02 21:24 ` pinskia at gcc dot gnu dot org
2004-06-02 21:25 ` pinskia at gcc dot gnu dot org
` (20 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-02 21:24 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-02 21:24 -------
int f(int x)
{
return -1 - x; // ~a
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (2 preceding siblings ...)
2004-06-02 21:24 ` pinskia at gcc dot gnu dot org
@ 2004-06-02 21:25 ` pinskia at gcc dot gnu dot org
2004-06-02 21:26 ` pinskia at gcc dot gnu dot org
` (19 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-02 21:25 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-02 21:25 -------
int f(int x)
{
return x*9 - x; // x*8
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (3 preceding siblings ...)
2004-06-02 21:25 ` pinskia at gcc dot gnu dot org
@ 2004-06-02 21:26 ` pinskia at gcc dot gnu dot org
2004-06-02 22:23 ` pinskia at gcc dot gnu dot org
` (18 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-02 21:26 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-02 21:26 -------
int f(int x)
{
return -x - 9; // -9 - x
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (4 preceding siblings ...)
2004-06-02 21:26 ` pinskia at gcc dot gnu dot org
@ 2004-06-02 22:23 ` pinskia at gcc dot gnu dot org
2004-06-02 22:39 ` pinskia at gcc dot gnu dot org
` (17 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-02 22:23 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-02 22:23 -------
int f(int x, int y)
{
return 0/x; // 0
}
int g(int x, int y)
{
return 0%x; // 0
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (5 preceding siblings ...)
2004-06-02 22:23 ` pinskia at gcc dot gnu dot org
@ 2004-06-02 22:39 ` pinskia at gcc dot gnu dot org
2004-06-03 0:31 ` pinskia at gcc dot gnu dot org
` (16 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-02 22:39 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-02 22:39 -------
int f(int x, int y)
{
return x - y - x; // -y
}
#define abs(x) x>0?x:-x
int f(int x, int y)
{
return (abs(x)) >= 0; //1
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
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* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (6 preceding siblings ...)
2004-06-02 22:39 ` pinskia at gcc dot gnu dot org
@ 2004-06-03 0:31 ` pinskia at gcc dot gnu dot org
2004-06-26 20:27 ` pinskia at gcc dot gnu dot org
` (15 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-03 0:31 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-03 00:31 -------
#define abs(x) x>0?x:-x
int f(int x, int y)
{
return (abs(x)) == 0;
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (7 preceding siblings ...)
2004-06-03 0:31 ` pinskia at gcc dot gnu dot org
@ 2004-06-26 20:27 ` pinskia at gcc dot gnu dot org
2004-06-27 17:36 ` pinskia at gcc dot gnu dot org
` (14 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-26 20:27 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-26 20:22 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-06-26 20:22:52
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (8 preceding siblings ...)
2004-06-26 20:27 ` pinskia at gcc dot gnu dot org
@ 2004-06-27 17:36 ` pinskia at gcc dot gnu dot org
2004-07-04 7:43 ` kazu at cs dot umass dot edu
` (13 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-06-27 17:36 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-27 17:25 -------
Note the ones in Comment #0, are fixed by: <http://gcc.gnu.org/ml/gcc-patches/2004-06/
msg02250.html>.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (9 preceding siblings ...)
2004-06-27 17:36 ` pinskia at gcc dot gnu dot org
@ 2004-07-04 7:43 ` kazu at cs dot umass dot edu
2004-07-04 7:49 ` pinskia at gcc dot gnu dot org
` (12 subsequent siblings)
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From: kazu at cs dot umass dot edu @ 2004-07-04 7:43 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From kazu at cs dot umass dot edu 2004-07-04 07:43 -------
Strictly speaking, Comments #6 and #7 do not qualify for "TREE" keyword.
--
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* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (10 preceding siblings ...)
2004-07-04 7:43 ` kazu at cs dot umass dot edu
@ 2004-07-04 7:49 ` pinskia at gcc dot gnu dot org
2004-07-04 8:01 ` pinskia at gcc dot gnu dot org
` (11 subsequent siblings)
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From: pinskia at gcc dot gnu dot org @ 2004-07-04 7:49 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-07-04 07:49 -------
Actually they do on PowerPC.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (11 preceding siblings ...)
2004-07-04 7:49 ` pinskia at gcc dot gnu dot org
@ 2004-07-04 8:01 ` pinskia at gcc dot gnu dot org
2005-02-11 14:19 ` phython at gcc dot gnu dot org
` (10 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-07-04 8:01 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-07-04 08:01 -------
oh, here is why the last two happen on PowerPC and not on i?86, there is an abs pattern for POWER so
we (rs6000) have to a split for the abs so the large number of optimizations can happen before we get
to the point which we split the insn. On i686, it is split/expanded right during expand instead of
waiting until after reload which is what is done on PowerPC.
Also I got all of these by looking into the simplify-rtx.c file so this should be nothing different from
there.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
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* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (12 preceding siblings ...)
2004-07-04 8:01 ` pinskia at gcc dot gnu dot org
@ 2005-02-11 14:19 ` phython at gcc dot gnu dot org
2005-02-13 18:30 ` cvs-commit at gcc dot gnu dot org
` (9 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: phython at gcc dot gnu dot org @ 2005-02-11 14:19 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From phython at gcc dot gnu dot org 2005-02-11 05:48 -------
Created an attachment (id=8172)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8172&action=view)
not/negate folding testcase
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |phython at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
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* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (13 preceding siblings ...)
2005-02-11 14:19 ` phython at gcc dot gnu dot org
@ 2005-02-13 18:30 ` cvs-commit at gcc dot gnu dot org
2005-02-16 12:41 ` pinskia at gcc dot gnu dot org
` (8 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-02-13 18:30 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-02-13 06:21 -------
Subject: Bug 15784
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: phython@gcc.gnu.org 2005-02-13 06:21:36
Modified files:
gcc : ChangeLog fold-const.c
Log message:
2005-02-13 James A. Morrison <phython@gcc.gnu.org>
PR tree-optimization/14303
PR tree-optimization/15784
* fold-const.c (fold): Fold ABS_EXPR<x> >= 0 to true, when possible.
Fold ABS_EXPR<x> < 0 to false. Fold ABS_EXPR<x> == 0 to x == 0 and
ABS_EXPR<x> != 0 to x != 0.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7460&r2=2.7461
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.506&r2=1.507
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
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* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (14 preceding siblings ...)
2005-02-13 18:30 ` cvs-commit at gcc dot gnu dot org
@ 2005-02-16 12:41 ` pinskia at gcc dot gnu dot org
2005-03-04 2:49 ` cvs-commit at gcc dot gnu dot org
` (7 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-16 12:41 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-16 05:38 -------
Patch here: <http://gcc.gnu.org/ml/gcc-patches/2005-02/msg00905.html>. Thanks James for
looking into this.
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (15 preceding siblings ...)
2005-02-16 12:41 ` pinskia at gcc dot gnu dot org
@ 2005-03-04 2:49 ` cvs-commit at gcc dot gnu dot org
2005-03-04 2:55 ` phython at gcc dot gnu dot org
` (6 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-03-04 2:49 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-03-04 02:49 -------
Subject: Bug 15784
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: phython@gcc.gnu.org 2005-03-04 02:48:32
Modified files:
gcc : ChangeLog fold-const.c
gcc/testsuite : ChangeLog
Added files:
gcc/testsuite/gcc.dg: pr15784-4.c
Log message:
2005-03-03 James A. Morrison <phython@gcc.gnu.org>
PR tree-optimization/15784
* fold-const.c (fold): Fold ~A + 1 to -1. Fold -A - 1
and -1 - A to ~A.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7657&r2=2.7658
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.520&r2=1.521
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5106&r2=1.5107
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/pr15784-4.c.diff?cvsroot=gcc&r1=NONE&r2=1.1
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
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* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (16 preceding siblings ...)
2005-03-04 2:49 ` cvs-commit at gcc dot gnu dot org
@ 2005-03-04 2:55 ` phython at gcc dot gnu dot org
2005-03-04 3:27 ` pinskia at gcc dot gnu dot org
` (5 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: phython at gcc dot gnu dot org @ 2005-03-04 2:55 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From phython at gcc dot gnu dot org 2005-03-04 02:55 -------
The binary conditions below are all folded now.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Version|4.0.0 |4.1.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
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* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (17 preceding siblings ...)
2005-03-04 2:55 ` phython at gcc dot gnu dot org
@ 2005-03-04 3:27 ` pinskia at gcc dot gnu dot org
2005-03-04 6:24 ` cvs-commit at gcc dot gnu dot org
` (4 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-03-04 3:27 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.1.0
Version|4.1.0 |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (18 preceding siblings ...)
2005-03-04 3:27 ` pinskia at gcc dot gnu dot org
@ 2005-03-04 6:24 ` cvs-commit at gcc dot gnu dot org
2005-03-04 6:26 ` pinskia at gcc dot gnu dot org
` (3 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-03-04 6:24 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-03-04 06:24 -------
Subject: Bug 15784
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: pinskia@gcc.gnu.org 2005-03-04 06:24:12
Modified files:
gcc : ChangeLog fold-const.c
Log message:
2005-03-04 Andrew Pinski <pinskia@physics.uc.edu>
Revert for now:
2005-03-03 James A. Morrison <phython@gcc.gnu.org>
PR tree-optimization/15784
* fold-const.c (fold): Fold ~A + 1 to -1. Fold -A - 1
and -1 - A to ~A.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7662&r2=2.7663
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.522&r2=1.523
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
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* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (19 preceding siblings ...)
2005-03-04 6:24 ` cvs-commit at gcc dot gnu dot org
@ 2005-03-04 6:26 ` pinskia at gcc dot gnu dot org
2005-03-08 0:21 ` steven at gcc dot gnu dot org
` (2 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-03-04 6:26 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-03-04 06:26 -------
Reopening as this patch had to reverted as it caused a bootstrap failure on ppc-darwin. I think there
really is a latent bug with -1 - A being converted to ~A and then ~A is constant folded to -1 but it
contains a TREE_OVERFLOW bit turned on which it did not with -1 - A before. (there might be some
unsignedness going on that I don't know about).
--
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (20 preceding siblings ...)
2005-03-04 6:26 ` pinskia at gcc dot gnu dot org
@ 2005-03-08 0:21 ` steven at gcc dot gnu dot org
2005-03-11 4:53 ` cvs-commit at gcc dot gnu dot org
2005-03-11 5:03 ` phython at gcc dot gnu dot org
23 siblings, 0 replies; 25+ messages in thread
From: steven at gcc dot gnu dot org @ 2005-03-08 0:21 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From steven at gcc dot gnu dot org 2005-03-08 00:21 -------
More on the latent bug that the patch for this PR uncovers:
http://gcc.gnu.org/ml/gcc-patches/2005-03/msg00448.html
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (21 preceding siblings ...)
2005-03-08 0:21 ` steven at gcc dot gnu dot org
@ 2005-03-11 4:53 ` cvs-commit at gcc dot gnu dot org
2005-03-11 5:03 ` phython at gcc dot gnu dot org
23 siblings, 0 replies; 25+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-03-11 4:53 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-03-11 04:52 -------
Subject: Bug 15784
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: law@gcc.gnu.org 2005-03-11 04:52:44
Modified files:
gcc : ChangeLog fold-const.c stmt.c
Log message:
PR tree-optimization/15784
* fold-const.c (fold): Fold ~A + 1 to -A. Fold -A - 1
and -1 - A to ~A.
* stmt.c (expand_case): Don't change index_type. Convert minval
to the proper type.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7782&r2=2.7783
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.540&r2=1.541
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/stmt.c.diff?cvsroot=gcc&r1=1.417&r2=1.418
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
* [Bug tree-optimization/15784] fold misses binary optimization
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
` (22 preceding siblings ...)
2005-03-11 4:53 ` cvs-commit at gcc dot gnu dot org
@ 2005-03-11 5:03 ` phython at gcc dot gnu dot org
23 siblings, 0 replies; 25+ messages in thread
From: phython at gcc dot gnu dot org @ 2005-03-11 5:03 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From phython at gcc dot gnu dot org 2005-03-11 05:03 -------
Jeff Law rechecked in the patch for this bug.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15784
^ permalink raw reply [flat|nested] 25+ messages in thread
end of thread, other threads:[~2005-03-11 5:03 UTC | newest]
Thread overview: 25+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-06-02 20:45 [Bug tree-optimization/15784] New: fold misses bitwise optimization pinskia at gcc dot gnu dot org
2004-06-02 21:14 ` [Bug tree-optimization/15784] fold misses binary optimization pinskia at gcc dot gnu dot org
2004-06-02 21:22 ` pinskia at gcc dot gnu dot org
2004-06-02 21:24 ` pinskia at gcc dot gnu dot org
2004-06-02 21:25 ` pinskia at gcc dot gnu dot org
2004-06-02 21:26 ` pinskia at gcc dot gnu dot org
2004-06-02 22:23 ` pinskia at gcc dot gnu dot org
2004-06-02 22:39 ` pinskia at gcc dot gnu dot org
2004-06-03 0:31 ` pinskia at gcc dot gnu dot org
2004-06-26 20:27 ` pinskia at gcc dot gnu dot org
2004-06-27 17:36 ` pinskia at gcc dot gnu dot org
2004-07-04 7:43 ` kazu at cs dot umass dot edu
2004-07-04 7:49 ` pinskia at gcc dot gnu dot org
2004-07-04 8:01 ` pinskia at gcc dot gnu dot org
2005-02-11 14:19 ` phython at gcc dot gnu dot org
2005-02-13 18:30 ` cvs-commit at gcc dot gnu dot org
2005-02-16 12:41 ` pinskia at gcc dot gnu dot org
2005-03-04 2:49 ` cvs-commit at gcc dot gnu dot org
2005-03-04 2:55 ` phython at gcc dot gnu dot org
2005-03-04 3:27 ` pinskia at gcc dot gnu dot org
2005-03-04 6:24 ` cvs-commit at gcc dot gnu dot org
2005-03-04 6:26 ` pinskia at gcc dot gnu dot org
2005-03-08 0:21 ` steven at gcc dot gnu dot org
2005-03-11 4:53 ` cvs-commit at gcc dot gnu dot org
2005-03-11 5:03 ` phython at gcc dot gnu dot org
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