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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/31360] New: [4.3 Regression] rtl loop invariant is broken
Date: Mon, 26 Mar 2007 05:43:00 -0000 [thread overview]
Message-ID: <bug-31360-6528@http.gcc.gnu.org/bugzilla/> (raw)
Testcase:
void f(int *a)
{
int i;
for (i = 0;i<100;i++)
a[i] = 0;
}
-----------cut-------------
we get:
_f:
li r0,0
li r2,4
stw r0,0(r3)
li r0,99
mtctr r0
L2:
li r0,0
stwx r0,r2,r3
addi r2,r2,4
bdnz L2
blr
the "li r0,0" should be moved out of the loop but is not.
--
Summary: [4.3 Regression] rtl loop invariant is broken
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pinskia at gcc dot gnu dot org
GCC target triplet: powerpc-darwin
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31360
next reply other threads:[~2007-03-26 5:43 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-26 5:43 pinskia at gcc dot gnu dot org [this message]
2007-03-26 5:48 ` [Bug rtl-optimization/31360] " pinskia at gcc dot gnu dot org
2007-03-26 9:15 ` rguenth at gcc dot gnu dot org
2007-03-26 15:51 ` pinskia at gcc dot gnu dot org
2007-03-26 17:01 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
2007-03-26 17:09 ` pinskia at gcc dot gnu dot org
2007-03-26 17:18 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
2007-03-26 21:12 ` [Bug rtl-optimization/31360] [4.2/4.3 " pinskia at gcc dot gnu dot org
2007-03-26 21:14 ` steven at gcc dot gnu dot org
2007-03-26 21:17 ` pinskia at gcc dot gnu dot org
2007-03-26 21:33 ` steven at gcc dot gnu dot org
2007-03-26 21:36 ` steven at gcc dot gnu dot org
2007-03-26 21:37 ` pinskia at gcc dot gnu dot org
2007-03-26 21:43 ` steven at gcc dot gnu dot org
2007-03-26 21:44 ` steven at gcc dot gnu dot org
2007-03-26 22:05 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
2007-04-15 22:10 ` mmitchel at gcc dot gnu dot org
2007-04-16 16:53 ` rakdver at gcc dot gnu dot org
2007-04-17 16:42 ` rakdver at gcc dot gnu dot org
2007-04-17 21:13 ` [Bug rtl-optimization/31360] [4.2 " steven at gcc dot gnu dot org
2007-04-24 21:42 ` mmitchel at gcc dot gnu dot org
2007-04-24 21:44 ` pinskia at gcc dot gnu dot org
2007-05-05 23:28 ` rearnsha at gcc dot gnu dot org
2007-05-06 10:10 ` steven at gcc dot gnu dot org
2007-05-06 14:35 ` rearnsha at gcc dot gnu dot org
2007-05-06 17:10 ` steven at gcc dot gnu dot org
2007-05-06 17:14 ` pinskia at gcc dot gnu dot org
2007-05-14 21:26 ` mmitchel at gcc dot gnu dot org
2007-06-23 10:16 ` [Bug rtl-optimization/31360] [4.2 Regression] RTL loop invariant is not aggressive enough ebotcazou at gcc dot gnu dot org
2007-06-23 10:23 ` rguenth at gcc dot gnu dot org
2007-06-23 20:45 ` mmitchel at gcc dot gnu dot org
2007-06-25 8:06 ` rearnsha at gcc dot gnu dot org
2007-06-25 11:38 ` mmitchel at gcc dot gnu dot org
2007-07-20 3:52 ` mmitchel at gcc dot gnu dot org
2007-10-09 19:30 ` mmitchel at gcc dot gnu dot org
2007-11-02 8:18 ` ebotcazou at gcc dot gnu dot org
2007-11-02 8:22 ` pinskia at gcc dot gnu dot org
2007-11-03 7:25 ` ebotcazou at gcc dot gnu dot org
2007-11-03 7:28 ` ebotcazou at gcc dot gnu dot org
2007-11-03 7:28 ` ebotcazou at gcc dot gnu dot org
2007-12-08 23:47 ` pinskia at gcc dot gnu dot org
2008-02-12 13:14 ` alexandre dot nunes at gmail dot com
2008-03-03 14:30 ` alexandre dot nunes at gmail dot com
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