public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug tree-optimization/18529] New: When the lower bound of a loop is non-constant we cannot find the number of iterations
@ 2004-11-17 15:43 pinskia at gcc dot gnu dot org
2004-11-17 15:45 ` [Bug tree-optimization/18529] " pinskia at gcc dot gnu dot org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-11-17 15:43 UTC (permalink / raw)
To: gcc-bugs
long *a;
void f(int start, int end)
{
int i;
for (i = start; i <end ; i++)
a[i] = 0;
}
Some anylsis of the problem here: <http://gcc.gnu.org/ml/gcc/2004-08/msg01315.html>.
I filed this to keep track of it.
--
Summary: When the lower bound of a loop is non-constant we cannot
find the number of iterations
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Keywords: missed-optimization
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=18529
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/18529] When the lower bound of a loop is non-constant we cannot find the number of iterations
2004-11-17 15:43 [Bug tree-optimization/18529] New: When the lower bound of a loop is non-constant we cannot find the number of iterations pinskia at gcc dot gnu dot org
@ 2004-11-17 15:45 ` pinskia at gcc dot gnu dot org
2004-11-18 14:01 ` rakdver at gcc dot gnu dot org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-11-17 15:45 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-11-17 15:44 -------
Note this is like PR 18527 but a different problem (I don't know how offten this shows up in SPEC but I
found this when I was working on my loops to memset pass).
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |rakdver at gcc dot gnu dot
| |org
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-11-17 15:44:58
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18529
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/18529] When the lower bound of a loop is non-constant we cannot find the number of iterations
2004-11-17 15:43 [Bug tree-optimization/18529] New: When the lower bound of a loop is non-constant we cannot find the number of iterations pinskia at gcc dot gnu dot org
2004-11-17 15:45 ` [Bug tree-optimization/18529] " pinskia at gcc dot gnu dot org
@ 2004-11-18 14:01 ` rakdver at gcc dot gnu dot org
2004-11-18 21:54 ` rakdver at gcc dot gnu dot org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rakdver at gcc dot gnu dot org @ 2004-11-18 14:01 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rakdver at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18529
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/18529] When the lower bound of a loop is non-constant we cannot find the number of iterations
2004-11-17 15:43 [Bug tree-optimization/18529] New: When the lower bound of a loop is non-constant we cannot find the number of iterations pinskia at gcc dot gnu dot org
2004-11-17 15:45 ` [Bug tree-optimization/18529] " pinskia at gcc dot gnu dot org
2004-11-18 14:01 ` rakdver at gcc dot gnu dot org
@ 2004-11-18 21:54 ` rakdver at gcc dot gnu dot org
2004-11-22 21:34 ` rakdver at gcc dot gnu dot org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rakdver at gcc dot gnu dot org @ 2004-11-18 21:54 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rakdver at gcc dot gnu dot org 2004-11-18 21:54 -------
Patch:
http://gcc.gnu.org/ml/gcc-patches/2004-11/msg01516.html
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18529
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/18529] When the lower bound of a loop is non-constant we cannot find the number of iterations
2004-11-17 15:43 [Bug tree-optimization/18529] New: When the lower bound of a loop is non-constant we cannot find the number of iterations pinskia at gcc dot gnu dot org
` (3 preceding siblings ...)
2004-11-22 21:34 ` rakdver at gcc dot gnu dot org
@ 2004-11-22 21:34 ` cvs-commit at gcc dot gnu dot org
2004-12-01 0:40 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-11-22 21:34 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-11-22 21:33 -------
Subject: Bug 18529
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: rakdver@gcc.gnu.org 2004-11-22 21:33:48
Modified files:
gcc : ChangeLog fold-const.c tree-ssa-loop-niter.c
Log message:
PR tree-optimization/18529
* fold-const.c (fold_to_nonsharp_ineq_using_bound): New function.
(simple_operand_p): Use STRIP_NOPS. Consider SSA names simple.
(fold): Call fold_to_nonsharp_ineq_using_bound.
* tree-ssa-loop-niter.c (simplify_replace_tree): New function.
(number_of_iterations_cond): Fold the expressions before futher
processing.
(tree_simplify_using_condition): Handle case when cond or expr is
an EQ_EXPR specially.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.6459&r2=2.6460
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.475&r2=1.476
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-loop-niter.c.diff?cvsroot=gcc&r1=2.16&r2=2.17
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18529
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/18529] When the lower bound of a loop is non-constant we cannot find the number of iterations
2004-11-17 15:43 [Bug tree-optimization/18529] New: When the lower bound of a loop is non-constant we cannot find the number of iterations pinskia at gcc dot gnu dot org
` (2 preceding siblings ...)
2004-11-18 21:54 ` rakdver at gcc dot gnu dot org
@ 2004-11-22 21:34 ` rakdver at gcc dot gnu dot org
2004-11-22 21:34 ` cvs-commit at gcc dot gnu dot org
2004-12-01 0:40 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rakdver at gcc dot gnu dot org @ 2004-11-22 21:34 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rakdver at gcc dot gnu dot org 2004-11-22 21:34 -------
Fixed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18529
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/18529] When the lower bound of a loop is non-constant we cannot find the number of iterations
2004-11-17 15:43 [Bug tree-optimization/18529] New: When the lower bound of a loop is non-constant we cannot find the number of iterations pinskia at gcc dot gnu dot org
` (4 preceding siblings ...)
2004-11-22 21:34 ` cvs-commit at gcc dot gnu dot org
@ 2004-12-01 0:40 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-12-01 0:40 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18529
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2004-12-01 0:40 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-11-17 15:43 [Bug tree-optimization/18529] New: When the lower bound of a loop is non-constant we cannot find the number of iterations pinskia at gcc dot gnu dot org
2004-11-17 15:45 ` [Bug tree-optimization/18529] " pinskia at gcc dot gnu dot org
2004-11-18 14:01 ` rakdver at gcc dot gnu dot org
2004-11-18 21:54 ` rakdver at gcc dot gnu dot org
2004-11-22 21:34 ` rakdver at gcc dot gnu dot org
2004-11-22 21:34 ` cvs-commit at gcc dot gnu dot org
2004-12-01 0:40 ` pinskia at gcc dot gnu dot org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).