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* [Bug target/20196] New: Miscompilation of mem_init in 32-bit ppc linux kernel
@ 2005-02-24 19:58 jakub at gcc dot gnu dot org
2005-02-24 21:21 ` [Bug target/20196] " jakub at gcc dot gnu dot org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: jakub at gcc dot gnu dot org @ 2005-02-24 19:58 UTC (permalink / raw)
To: gcc-bugs
/* Origin: Mikael Pettersson <mikpe@csd.uu.se> and the Linux kernel. */
extern void abort (void);
unsigned long a = 0xc0000000, b = 0xd0000000;
unsigned long c = 0xc01bb958, d = 0xc0264000;
unsigned long e = 0xc0288000, f = 0xc02d4378;
void
foo (int x, int y, int z)
{
if (x != 245 || y != 36 || z != 444)
abort ();
}
int
main (void)
{
unsigned long g;
int h = 0, i = 0, j = 0;
for (g = a; g < b; g += 0x1000)
if (g < c)
h++;
else if (g >= d && g < e)
j++;
else if (g < f)
i++;
foo (i, j, h);
return 0;
}
is miscompiled on ppc at -O{1,2,3,s} -m32. Works with -O0 or -m64 at any
optimization level.
--
Summary: Miscompilation of mem_init in 32-bit ppc linux kernel
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: target
AssignedTo: jakub at gcc dot gnu dot org
ReportedBy: jakub at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: powerpc64-redhat-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20196
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/20196] Miscompilation of mem_init in 32-bit ppc linux kernel
2005-02-24 19:58 [Bug target/20196] New: Miscompilation of mem_init in 32-bit ppc linux kernel jakub at gcc dot gnu dot org
@ 2005-02-24 21:21 ` jakub at gcc dot gnu dot org
2005-02-24 21:28 ` [Bug target/20196] [4.0 Regression] " pinskia at gcc dot gnu dot org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu dot org @ 2005-02-24 21:21 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From jakub at gcc dot gnu dot org 2005-02-24 17:03 -------
The problem is that with the
http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00672.html
patch the earlyclobbers got lost.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2005-02-24 17:03:04
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20196
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/20196] [4.0 Regression] Miscompilation of mem_init in 32-bit ppc linux kernel
2005-02-24 19:58 [Bug target/20196] New: Miscompilation of mem_init in 32-bit ppc linux kernel jakub at gcc dot gnu dot org
2005-02-24 21:21 ` [Bug target/20196] " jakub at gcc dot gnu dot org
@ 2005-02-24 21:28 ` pinskia at gcc dot gnu dot org
2005-02-24 21:48 ` pinskia at gcc dot gnu dot org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-24 21:28 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
Keywords| |wrong-code
Summary|Miscompilation of mem_init |[4.0 Regression]
|in 32-bit ppc linux kernel |Miscompilation of mem_init
| |in 32-bit ppc linux kernel
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20196
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/20196] [4.0 Regression] Miscompilation of mem_init in 32-bit ppc linux kernel
2005-02-24 19:58 [Bug target/20196] New: Miscompilation of mem_init in 32-bit ppc linux kernel jakub at gcc dot gnu dot org
2005-02-24 21:21 ` [Bug target/20196] " jakub at gcc dot gnu dot org
2005-02-24 21:28 ` [Bug target/20196] [4.0 Regression] " pinskia at gcc dot gnu dot org
@ 2005-02-24 21:48 ` pinskia at gcc dot gnu dot org
2005-02-24 22:26 ` jakub at gcc dot gnu dot org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-24 21:48 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-24 17:11 -------
*** Bug 20194 has been marked as a duplicate of this bug. ***
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |mikpe at csd dot uu dot se
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20196
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/20196] [4.0 Regression] Miscompilation of mem_init in 32-bit ppc linux kernel
2005-02-24 19:58 [Bug target/20196] New: Miscompilation of mem_init in 32-bit ppc linux kernel jakub at gcc dot gnu dot org
` (2 preceding siblings ...)
2005-02-24 21:48 ` pinskia at gcc dot gnu dot org
@ 2005-02-24 22:26 ` jakub at gcc dot gnu dot org
2005-02-25 1:50 ` cvs-commit at gcc dot gnu dot org
2005-02-25 1:51 ` jakub at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu dot org @ 2005-02-24 22:26 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From jakub at gcc dot gnu dot org 2005-02-24 17:54 -------
Patch here: <http://gcc.gnu.org/ml/gcc-patches/2005-02/msg01521.html>
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20196
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/20196] [4.0 Regression] Miscompilation of mem_init in 32-bit ppc linux kernel
2005-02-24 19:58 [Bug target/20196] New: Miscompilation of mem_init in 32-bit ppc linux kernel jakub at gcc dot gnu dot org
` (3 preceding siblings ...)
2005-02-24 22:26 ` jakub at gcc dot gnu dot org
@ 2005-02-25 1:50 ` cvs-commit at gcc dot gnu dot org
2005-02-25 1:51 ` jakub at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-02-25 1:50 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-02-24 21:23 -------
Subject: Bug 20196
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: jakub@gcc.gnu.org 2005-02-24 21:23:15
Modified files:
gcc : ChangeLog
gcc/testsuite : ChangeLog
gcc/config/rs6000: rs6000.md
Added files:
gcc/testsuite/gcc.c-torture/execute: 20050224-1.c
Log message:
PR target/20196
* config/rs6000/rs6000.md (LTU, GTU sCC splitters): Add earlyclobber,
allow splitting only if operands 0 and 3 don't overlap.
* gcc.c-torture/execute/20050224-1.c: New test.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7582&r2=2.7583
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5083&r2=1.5084
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/rs6000/rs6000.md.diff?cvsroot=gcc&r1=1.348&r2=1.349
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.c-torture/execute/20050224-1.c.diff?cvsroot=gcc&r1=NONE&r2=1.1
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20196
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/20196] [4.0 Regression] Miscompilation of mem_init in 32-bit ppc linux kernel
2005-02-24 19:58 [Bug target/20196] New: Miscompilation of mem_init in 32-bit ppc linux kernel jakub at gcc dot gnu dot org
` (4 preceding siblings ...)
2005-02-25 1:50 ` cvs-commit at gcc dot gnu dot org
@ 2005-02-25 1:51 ` jakub at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu dot org @ 2005-02-25 1:51 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From jakub at gcc dot gnu dot org 2005-02-24 21:24 -------
Fixed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20196
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2005-02-24 21:24 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2005-02-24 19:58 [Bug target/20196] New: Miscompilation of mem_init in 32-bit ppc linux kernel jakub at gcc dot gnu dot org
2005-02-24 21:21 ` [Bug target/20196] " jakub at gcc dot gnu dot org
2005-02-24 21:28 ` [Bug target/20196] [4.0 Regression] " pinskia at gcc dot gnu dot org
2005-02-24 21:48 ` pinskia at gcc dot gnu dot org
2005-02-24 22:26 ` jakub at gcc dot gnu dot org
2005-02-25 1:50 ` cvs-commit at gcc dot gnu dot org
2005-02-25 1:51 ` jakub at gcc dot gnu dot org
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