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[Bug tree-optimization/20643] [4.0/4.1/4.2 Regression] Tree loop optimizer does worse job than RTL loop optimizer
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Jul 2006 13:52:59 -0000
- Subject: [Bug tree-optimization/20643] [4.0/4.1/4.2 Regression] Tree loop optimizer does worse job than RTL loop optimizer
- References: <bug-20643-3107@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #12 from steven at gcc dot gnu dot org 2006-07-16 13:52 -------
The test case in comment #11 looks like a classic store motion opportunity to
me. GCC 3.3 performs the store motion, GCC 4.2 r115467 does not.
Zdenek, I thought tree-ssa-lim should be able to do store motion in loops?
--
steven at gcc dot gnu dot org changed:
What |Removed |Added
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CC| |rakdver at gcc dot gnu dot
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Last reconfirmed|2006-02-01 04:41:41 |2006-07-16 13:52:59
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20643