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[Bug tree-optimization/32921] [4.3 Regression] Revision 126326 causes 12% slowdown
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 24 Oct 2007 15:18:03 -0000
- Subject: [Bug tree-optimization/32921] [4.3 Regression] Revision 126326 causes 12% slowdown
- References: <bug-32921-682@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #33 from rguenth at gcc dot gnu dot org 2007-10-24 15:18 -------
DOM does, so scheduling another dominator pass after PRE (where alias is
re-run)
fixes the problem. One problem with partitioning is that we don't collect
statistics for symbols inside a partition, which makes all but the first
paritioning run prefer already partitioned symbols.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32921