This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: IV-OPTs causes huge regression
- From: David Edelsohn <dje at watson dot ibm dot com>
- To: Andrew Pinski <pinskia at physics dot uc dot edu>, Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>
- Cc: gcc at gcc dot gnu dot org
- Date: Wed, 13 Oct 2004 14:20:14 -0400
- Subject: Re: IV-OPTs causes huge regression
- References: <B3844F6B-1D13-11D9-9E71-000A95D692F4@physics.uc.edu>
Zdenek has submitted a patch to fix an oversight in the original
ivopts patch that considers "important" candidates:
http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02937.html
Some colleagues observed related performance problems. The patch might
help the SPEC95 regressions.
The patch thread is awaiting a response from Zdenek regarding the
logical bitmap operation used to prune the candidates:
http://gcc.gnu.org/ml/gcc-patches/2004-09/msg03085.html
David