Hi Uli,
While looking into something else I ran into these - I wonder how many of these GCC manages to vectorize ...
http://www.netlib.org/benchmark/livermorec . These look interesting from a vectorizer kernels point of view.
The other interesting paper of note was this PACT paper on vectorization benchmarks comparing icc , xlc and GCC which might provide some interesting hints / reading. http://polaris.cs.uiuc.edu/~garzaran/doc/pact11.pdf . The appropriate benchmarks kernels are linked to below.
http://polaris.cs.uiuc.edu/ ̃maleki1/TSVC.tar.gz.
regards, Ramana