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[Bug middle-end/29256] [4.2 regression] loop unrolling 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: 28 Sep 2006 11:08:02 -0000
- Subject: [Bug middle-end/29256] [4.2 regression] loop unrolling performance regression
- References: <bug-29256-12262@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from rguenth at gcc dot gnu dot org 2006-09-28 11:08 -------
On x86_64 4.2 decides to unroll 9 times while on 4.1 it unrolls 8 times. This
is
a code-size regression, but other than that? The 4.2 version runs slightly
faster than the 4.1 version, though the difference may be in the noise.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
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CC| |rguenth at gcc dot gnu dot
| |org, rakdver at gcc dot gnu
| |dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29256