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[Bug tree-optimization/33604] [4.3 Regression] Revision 119502 causes significantly slower results with 4.3 compared to 4.2
- From: "paolo dot bonzini at lu dot unisi dot ch" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Nov 2007 06:03:09 -0000
- Subject: [Bug tree-optimization/33604] [4.3 Regression] Revision 119502 causes significantly slower results with 4.3 compared to 4.2
- References: <bug-33604-15171@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #13 from paolo dot bonzini at lu dot unisi dot ch 2007-11-07 06:03 -------
Subject: Re: [4.3 Regression] Revision 119502
causes significantly slower results with 4.3 compared to 4.2
> I don't think we want to start playing with the heuristics ;) That patch
> certainly will cause compile-time and memory usage regressions.
Not for -O2, since the default AVG_ALIASED_VOPS is 1. For -O3 it is 3,
not huge either.
Paolo
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33604