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[Bug tree-optimization/42108] [4.4/4.5 Regression] 50% performance regression
- From: "matz 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 05:25:59 -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 #27 from matz at gcc dot gnu dot org 2009-12-14 05:25 -------
Created an attachment (id=19287)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19287&action=view)
three hacks
My current collection of patches and hacks for this problem. Obviously the
"if (0)" in tree-ssa-pre.c will break pr38819 again; apart from that untested,
hence probably miscompiles everything except this testcase here :-)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42108