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[Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP
- From: "stevenb dot gcc at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 11 Nov 2007 09:23:48 -0000
- Subject: [Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP
- References: <bug-19097-7737@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #45 from stevenb dot gcc at gmail dot com 2007-11-11 09:23 -------
Subject: Re: [4.1/4.2/4.3 regression] Quadratic behavior with many sets for
the same register in VRP
Because it costs more than it brings: compile time on average goes
_up_ with that patch.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19097