This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: Optimize nonoptimizing compilation IV
- From: Neil Booth <neil at daikokuya dot co dot uk>
- To: Jan Hubicka <jh at suse dot cz>
- Cc: gcc-patches at gcc dot gnu dot org, rth at cygnus dot com
- Date: Sat, 22 Feb 2003 15:03:24 +0000
- Subject: Re: Optimize nonoptimizing compilation IV
- References: <20030222114857.GE9783@kam.mff.cuni.cz>
Jan Hubicka wrote:-
> Hi,
> this patch avoids optimize_mode_swithcing when no instructions needing
> it are present in the insn stream. It saves 7% out of insn-attrtab
> build time at -O0. Together with the tidy_fallthru_eges we are already
> faster than gcc-3.0 (and with this patch only we are faster than
> gcc-3.2)
Cool. Is CPP beginning to be a significant part of the time at -O0?
We should be able to get it to at least 30% I expect.
Neil.