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[Bug tree-optimization/38785] [4.4/4.5/4.6/4.7 Regression] huge performance regression on EEMBC bitmnp01
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 16 Jan 2012 13:14:22 +0000
- Subject: [Bug tree-optimization/38785] [4.4/4.5/4.6/4.7 Regression] huge performance regression on EEMBC bitmnp01
- Auto-submitted: auto-generated
- References: <bug-38785-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38785
--- Comment #28 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-16 13:14:22 UTC ---
Re-confirmed. Regular PRE has got some kind of a cost-model (restricting
insertion to the case where we eliminate a redundancy on a fast path).
Partial-insertion has not been updated in a similar manner.