From: ami_stuff <ami_stuff@o2.pl>
To: "Richard Guenther" <richard.guenther@gmail.com>
Cc: gcc@gcc.gnu.org
Subject: Re: "-fno-unswitch-loops" option have no effect?
Date: Mon, 17 Aug 2009 13:35:00 -0000 [thread overview]
Message-ID: <171913d8.edfa43f.4a894dda.88a2c@o2.pl> (raw)
In-Reply-To: <84fc9c000908170438t787f3e75w15c44dd8e9080a2d@mail.gmail.com>
Hi,
> Works fine for me. gcc.dg/tree-ssa/loop-6.c is unswitched with -O3
> but not with -O3 -fno-unswitch-loops.
This one works for me too.
Could you try to compile "deflate.c" from libz?
Here are my results:
-m68060 -O3 -fno-unswitch-loops - 12,9kb
-m68060 -O3 - 12,9kb
-m68060 -O2 -finline-functions -fgcse-after-reload -ftree-vectorize -fpredictive-commoning - 12,4kb
but it's a lot more visible with "libavcodec/dsputil.c" from FFmpeg package:
OPTFLAGS= -mnobitfield -m68060 -std=c99 -Wdeclaration-after-statement -Wdisabled-optimization -fno-math-errno -D_ISOC99_SOURCE -D_POSIX_C_SOURCE=200112 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fno-common -fomit-frame-pointer -Wall -Wno-switch -Wpointer-arith -Wredundant-decls -Wcast-qual -Wwrite-strings -Wundef -O2 -finline-functions -fgcse-after-reload -ftree-vectorize -fpredictive-commoning:
306kb
OPTFLAGS= -mnobitfield -m68060 -std=c99 -Wdeclaration-after-statement -Wdisabled-optimization -fno-math-errno -D_ISOC99_SOURCE -D_POSIX_C_SOURCE=200112 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fno-common -fomit-frame-pointer -Wall -Wno-switch -Wpointer-arith -Wredundant-decls -Wcast-qual -Wwrite-strings -Wundef -O3 -fno-unswitch-loops:
1,18mb
OPTFLAGS= -mnobitfield -m68060 -std=c99 -Wdeclaration-after-statement -Wdisabled-optimization -fno-math-errno -D_ISOC99_SOURCE -D_POSIX_C_SOURCE=200112 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fno-common -fomit-frame-pointer -Wall -Wno-switch -Wpointer-arith -Wredundant-decls -Wcast-qual -Wwrite-strings -Wundef -O3
1,18mb
Regards
next prev parent reply other threads:[~2009-08-17 12:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-17 7:19 ami_stuff
[not found] ` <56d259a00908170344v54442954u3a5d0337de3b98fe@mail.gmail.com>
2009-08-17 13:29 ` ami_stuff
2009-08-17 19:42 ` Bernd Roesch
2009-08-17 19:54 ` ami_stuff
2009-08-17 22:16 ` Alexander Strange
2009-08-17 13:33 ` Richard Guenther
2009-08-17 13:35 ` ami_stuff [this message]
2009-08-17 16:01 ` Paolo Bonzini
2009-08-17 16:07 ` ami_stuff
2009-08-17 16:14 ` Paolo Bonzini
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