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* [Bug c/18707] New: Performance regression at -O2 with gzip
@ 2004-11-28 20:30 ebotcazou at gcc dot gnu dot org
2004-11-28 20:32 ` [Bug regression/18707] [4.0 Regression] " pinskia at gcc dot gnu dot org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: ebotcazou at gcc dot gnu dot org @ 2004-11-28 20:30 UTC (permalink / raw)
To: gcc-bugs
GCC 4.0.0pre generates worse code than GCC 3.4.4pre at -O2 for gzip 1.2.4 on
UltraSPARC III. I've also included Sun ONE Studio 8 as a comparison point.
32-bit GCC vs Sun ONE Studio 8 CC:
cc: "-fast -xarch=v8plusb -xchip=ultra3"
gcc: "-O2 -mcpu=ultrasparc3"
-rwxrwxr-x 1 eric eric 72464 Nov 28 13:08 gzip33
-rwxrwxr-x 1 eric eric 71444 Nov 28 13:09 gzip34
-rwxrwxr-x 1 eric eric 71904 Nov 28 13:10 gzip40
-rwxrwxr-x 1 eric eric 118316 Nov 28 13:42 gzipcc
./gzip33 gcc.tar 28.99s user 0.78s system 98% cpu 30.343 total
./gzip33 gcc.tar 29.03s user 0.64s system 98% cpu 29.989 total
./gzip33 gcc.tar 29.01s user 0.64s system 98% cpu 29.994 total
./gzip34 gcc.tar 24.24s user 0.70s system 98% cpu 25.383 total
./gzip34 gcc.tar 24.29s user 0.65s system 98% cpu 25.296 total
./gzip34 gcc.tar 24.30s user 0.64s system 98% cpu 25.231 total
./gzip40 gcc.tar 24.76s user 0.63s system 98% cpu 25.737 total
./gzip40 gcc.tar 24.75s user 0.63s system 98% cpu 25.668 total
./gzip40 gcc.tar 24.75s user 0.58s system 98% cpu 25.696 total
./gzipcc gcc.tar 24.53s user 0.99s system 95% cpu 26.663 total
./gzipcc gcc.tar 24.45s user 0.73s system 98% cpu 25.476 total
./gzipcc gcc.tar 24.51s user 0.65s system 98% cpu 25.513 total
64-bit GCC vs Sun ONE Studio 8 CC:
cc: "-fast -xarch=v9b -xchip=ultra3"
gcc: "-O2 -mcpu=ultrasparc3"
-rwxrwxr-x 1 eric eric 109336 Nov 28 12:56 gzip33
-rwxrwxr-x 1 eric eric 104504 Nov 28 12:57 gzip34
-rwxrwxr-x 1 eric eric 105048 Nov 28 12:59 gzip40
-rwxrwxr-x 1 eric eric 149120 Nov 28 13:45 gzipcc
./gzip33 gcc.tar 33.54s user 0.65s system 99% cpu 34.458 total
./gzip33 gcc.tar 33.40s user 0.64s system 99% cpu 34.154 total
./gzip33 gcc.tar 33.45s user 0.54s system 99% cpu 34.101 total
./gzip34 gcc.tar 28.54s user 0.71s system 99% cpu 29.365 total
./gzip34 gcc.tar 28.64s user 0.60s system 99% cpu 29.345 total
./gzip34 gcc.tar 28.78s user 0.43s system 99% cpu 29.295 total
./gzip40 gcc.tar 30.77s user 0.48s system 99% cpu 31.369 total
./gzip40 gcc.tar 30.51s user 0.72s system 99% cpu 31.367 total
./gzip40 gcc.tar 30.65s user 0.62s system 99% cpu 31.378 total
./gzipcc gcc.tar 26.67s user 0.83s system 98% cpu 27.840 total
./gzipcc gcc.tar 26.69s user 0.67s system 99% cpu 27.438 total
./gzipcc gcc.tar 26.58s user 0.75s system 99% cpu 27.457 total
--
Summary: Performance regression at -O2 with gzip
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ebotcazou at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: sparc*-*-*
GCC host triplet: sparc*-*-*
GCC target triplet: sparc*-*-*
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18707
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug regression/18707] [4.0 Regression] Performance regression at -O2 with gzip
2004-11-28 20:30 [Bug c/18707] New: Performance regression at -O2 with gzip ebotcazou at gcc dot gnu dot org
@ 2004-11-28 20:32 ` pinskia at gcc dot gnu dot org
2004-11-29 11:06 ` [Bug tree-optimization/18707] " ebotcazou at gcc dot gnu dot org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-11-28 20:32 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Component|c |regression
Keywords| |missed-optimization
Summary|Performance regression at - |[4.0 Regression] Performance
|O2 with gzip |regression at -O2 with gzip
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18707
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/18707] [4.0 Regression] Performance regression at -O2 with gzip
2004-11-28 20:30 [Bug c/18707] New: Performance regression at -O2 with gzip ebotcazou at gcc dot gnu dot org
2004-11-28 20:32 ` [Bug regression/18707] [4.0 Regression] " pinskia at gcc dot gnu dot org
@ 2004-11-29 11:06 ` ebotcazou at gcc dot gnu dot org
2004-11-29 19:25 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: ebotcazou at gcc dot gnu dot org @ 2004-11-29 11:06 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From ebotcazou at gcc dot gnu dot org 2004-11-29 11:06 -------
The problem comes from t27.ch, at least in 32-bit mode.
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |ebotcazou at gcc dot gnu dot
|dot org |org
Status|UNCONFIRMED |ASSIGNED
Component|regression |tree-optimization
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18707
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/18707] [4.0 Regression] Performance regression at -O2 with gzip
2004-11-28 20:30 [Bug c/18707] New: Performance regression at -O2 with gzip ebotcazou at gcc dot gnu dot org
2004-11-28 20:32 ` [Bug regression/18707] [4.0 Regression] " pinskia at gcc dot gnu dot org
2004-11-29 11:06 ` [Bug tree-optimization/18707] " ebotcazou at gcc dot gnu dot org
@ 2004-11-29 19:25 ` pinskia at gcc dot gnu dot org
2004-12-16 20:01 ` cvs-commit at gcc dot gnu dot org
2004-12-16 20:04 ` ebotcazou at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-11-29 19:25 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-11-29 19:25 -------
Patch here: <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg02582.html>.
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18707
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/18707] [4.0 Regression] Performance regression at -O2 with gzip
2004-11-28 20:30 [Bug c/18707] New: Performance regression at -O2 with gzip ebotcazou at gcc dot gnu dot org
` (2 preceding siblings ...)
2004-11-29 19:25 ` pinskia at gcc dot gnu dot org
@ 2004-12-16 20:01 ` cvs-commit at gcc dot gnu dot org
2004-12-16 20:04 ` ebotcazou at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-12-16 20:01 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-12-16 20:01 -------
Subject: Bug 18707
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: ebotcazou@gcc.gnu.org 2004-12-16 20:01:26
Modified files:
gcc : ChangeLog cfgloopmanip.c
Log message:
PR tree-optimization/18707
* cfgloopmanip.c (create_preheader): Move the preheader
only if the latch was falling through to the header.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.6860&r2=2.6861
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfgloopmanip.c.diff?cvsroot=gcc&r1=1.39&r2=1.40
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18707
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/18707] [4.0 Regression] Performance regression at -O2 with gzip
2004-11-28 20:30 [Bug c/18707] New: Performance regression at -O2 with gzip ebotcazou at gcc dot gnu dot org
` (3 preceding siblings ...)
2004-12-16 20:01 ` cvs-commit at gcc dot gnu dot org
@ 2004-12-16 20:04 ` ebotcazou at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: ebotcazou at gcc dot gnu dot org @ 2004-12-16 20:04 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From ebotcazou at gcc dot gnu dot org 2004-12-16 20:04 -------
See http://gcc.gnu.org/ml/gcc-patches/2004-12/msg01232.html
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18707
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2004-12-16 20:04 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-11-28 20:30 [Bug c/18707] New: Performance regression at -O2 with gzip ebotcazou at gcc dot gnu dot org
2004-11-28 20:32 ` [Bug regression/18707] [4.0 Regression] " pinskia at gcc dot gnu dot org
2004-11-29 11:06 ` [Bug tree-optimization/18707] " ebotcazou at gcc dot gnu dot org
2004-11-29 19:25 ` pinskia at gcc dot gnu dot org
2004-12-16 20:01 ` cvs-commit at gcc dot gnu dot org
2004-12-16 20:04 ` ebotcazou at gcc dot gnu dot org
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