[Bug tree-optimization/26854] Inordinate compile times on large routines

["zadeck at naturalbridge dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #55 from zadeck at naturalbridge dot com  2008-01-17 22:57 -------
Subject: Re:  Inordinate compile times on large
 routines

lucier at math dot purdue dot edu wrote:
> ------- Comment #54 from lucier at math dot purdue dot edu  2008-01-17 22:39 -------
> Created an attachment (id=14963)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14963&action=view)
>  --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14963&action=view)
> memory details for 131610
>
> This is the detailed memory usage for the compiler
>
> euler-5% /pkgs/gcc-mainline/bin/gcc -v
> Using built-in specs.
> Target: x86_64-unknown-linux-gnu
> Configured with: ../../mainline/configure --prefix=/pkgs/gcc-mainline
> --enable-languages=c --enable-checking=release --with-gmp=/pkgs/gmp-4.2.2
> --with-mpfr=/pkgs/gmp-4.2.2 --enable-gather-detailed-mem-stats
> Thread model: posix
> gcc version 4.3.0 20080117 (experimental) [trunk revision 131610] (GCC) 
>
> The maximum memory I observed in top was 10.2 GB.
>
> Kenny, I can't tell whether your patch from
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34400#c50
>
> has been committed; will that improve the situation, too?
>
>
>   
it could, but it is not the big issue here, the big issue is the size of
the def use chains.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26854