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[Bug tree-optimization/32183] [4.3 Regression] reassoc2 can more extra calculations into a loop
- From: "rakdver at kam dot mff dot cuni dot cz" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 2 Jun 2007 07:49:34 -0000
- Subject: [Bug tree-optimization/32183] [4.3 Regression] reassoc2 can more extra calculations into a loop
- References: <bug-32183-682@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #15 from rakdver at kam dot mff dot cuni dot cz 2007-06-02 07:49 -------
Subject: Re: [4.3 Regression] reassoc2 can more extra calculations into a loop
> > Has anyone measured impact of adding DCE on SPEC CPU 2000/2006 peformance?
>
> Take a look at:
> http://www.suse.de/~gcctest/SPEC/CFP/sb-haydn-head-64-32o-32bit/172_mgrid_recent_big.png
actually, the mgrid jump is due to predictive commoning.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32183