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[Bug tree-optimization/42108] [4.4/4.5 Regression] 50% performance regression
- 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: 14 Dec 2009 11:49:55 -0000
- Subject: [Bug tree-optimization/42108] [4.4/4.5 Regression] 50% performance regression
- References: <bug-42108-9410@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #31 from rguenth at gcc dot gnu dot org 2009-12-14 11:49 -------
Created an attachment (id=19288)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19288&action=view)
another hack
Sorts the SCCs after collecting them all. Breaks most of the PRE/FRE testcases
because it sorts all SCCs, not only those that have no direct dependencies.
Not easy to fix though.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42108