[Bug middle-end/29256] [4.2 regression] loop unrolling performance regression

[rguenth 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