I guess this is some configure flag missing, does anybody have a clue?
Yes, you must build with --enable-gold --enable-plugins :-)
Is that for gcc or for binutils (neither documents this in ./configure
--help) ?
I used it for both, but only get this to work with binutils CVS, is that
c
Hi,
I found out that when I use "-fno-unswitch-loops" option, it have no effect -
loops are unswitched anyway:
-O3 -fno-unswitch-loops
Because of that to avoid -funswitch-loops optimization I must use something
like this:
-O2 -finline-functions -fpredictive-commoning -fgcse-after-reload
-ftr
Snapshot gcc-4.3-20090816 is now available on
ftp://gcc.gnu.org/pub/gcc/snapshots/4.3-20090816/
and on various mirrors, see http://gcc.gnu.org/mirrors.html for details.
This snapshot has been generated from the GCC 4.3 SVN branch
with the following options: svn://gcc.gnu.org/svn/gcc/branches
Yes, GCC is bigger and slower and for several architectures generates
bigger, slower code with every release, though saying so won't make
you very popular on this list! :)
One theory is that there are now so many different optimization passes
(and, worse, clever case-specific hacks hidden in the b
Hi,
The problematic source code is deflate.c from libz.
CFLAGS=-O3 -DUSE_MMAP -m68060 -fomit-frame-pointer
When I compile all source code with GCC 4.4.1, I get slow minigzip binary.
When I compile all source code with GCC 4.4.1 except deflate.c (this one I
compile with GCC 3.4.0), I get minigzi
please correct the Bugreport 40454 with the values of gcc 4.1.2 4.2.5.
it seem 4.1.2 reach near same speed as 3.4.0 but all later gcc are
slower in some programs.
this can also see on ffmpeg. also on X86 ffmpeg see here it is see.
what is change after 4.1.2 that can cause slower executable spe
Hi,
I found out that GCC 4.4.x build of minigzip from zlib package is a lot slower
compared to GCC 3.4.0 build.
Maybe someone can compile minigzip for his system with GCC 3.4.x and GCC 4.4.x
and compare time of compression
with bigger file? This way we would know if this regression only happens
2009/8/15 VandeVondele Joost :
>
>
> I'd like to test lto on a project where objects first go through an archive,
> and so wanted to follow http://gcc.gnu.org/wiki/LinkTimeOptimization
> using 'gcc -use-linker-plugin'
> However, I can't get this to work.
>
> gfortran -use-linker-plugin -flto main
