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[Bug rtl-optimization/45223] RTL PRE GCSE pass hoists trapping insn out of loop
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 12 Aug 2010 14:46:04 -0000
- Subject: [Bug rtl-optimization/45223] RTL PRE GCSE pass hoists trapping insn out of loop
- References: <bug-45223-1649@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #6 from ubizjak at gmail dot com 2010-08-12 14:46 -------
Ouch, "Here are the ration of before and after on Intel Core i7. Gzip slowed
down by 10 to 20%." [1]
Richi says: "The fix is to teach LIM to do conditional invariant motion."
Probably also related to PR42108 catch-all PR.
[1] http://gcc.gnu.org/ml/gcc-patches/2010-08/msg00771.html
[2] http://gcc.gnu.org/ml/gcc-patches/2010-08/msg00884.html
--
ubizjak at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |42108
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45223