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[Bug target/27855] reassociation pass produces ~30% slower matrix multiplication code
- From: "uros at kss-loka dot si" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 2 Jun 2006 10:04:38 -0000
- Subject: [Bug target/27855] reassociation pass produces ~30% slower matrix multiplication code
- References: <bug-27855-1649@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from uros at kss-loka dot si 2006-06-02 10:04 -------
(In reply to comment #1)
> There is nothing special about reassociation at all. In fact what you are
> seeing is register allocator going funky. This what you get with x87.
This is also what you get with SSE.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27855