Polyhedron 2005 regressions

Comparing the Polyhedron 2005 benchmark results for gfortran from
llvm-gcc-4.2 of April 7th, 2010 and September 18th, 2010 (from
the rc2 2.8 release branch), we seem to be regressing in performance
for this release....

Comparing the Polyhedron 2005 benchmark results for gfortran from
llvm-gcc-4.2 of April 7th, 2010 and September 18th, 2010 (from
the rc2 2.8 release branch), we seem to be regressing in performance
for this release....

It looks like some wins, but bigger losses. Would you be willing to reduce capacita or ac to a smallish example that shows the performance regression?

-Chris