[Bug middle-end/33966] Revision 129625 caused 11% slowdown on 200.sixtrack

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2007-11-01 11:36 -------
Note I didn't experience any sixtrack regression (-O3 and -O3 -funroll-loops
-ffast-math) on Opteron.  This is very likely a partitioning issue, as the
--param max-aliased-vops is different for -O2 vs. -O3 and sixtrack likely
"lived on the edge" with the -O2 setting.

The patch mainly changed which variables with the same partitioning score are
considered for partitioning.  So if at all, this is a partitioning/scoring bug.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
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                 CC|rguenther at suse dot de    |rguenth at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33966