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[Bug tree-optimization/18595] [4.0 Regression] IV-OPTS is O(N^3)
- From: "rakdver at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 23 Jan 2005 17:04:23 -0000
- Subject: [Bug tree-optimization/18595] [4.0 Regression] IV-OPTS is O(N^3)
- References: <20041121145949.18595.pinskia@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rakdver at gcc dot gnu dot org 2005-01-23 17:04 -------
One extra N factor seems to be coming from simple_iv
(analyze_scalar_evolution_in_loop). The function was created before
loop closed ssa form, under assumptions of lcssa it should be possible
to get rid of this. I am working on patch
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18595