Graphite can't do loop blocking on SPEC2000?

[Mingjie Xing]

Hi,

Did anyone test loop blocking on SPEC2000? We use gcc 4.6 with
"-floop-block -fdump-tree-graphite-all", then grep keyword "blocked"
in the dump files. The result shows there is no loop can be blocked
by gcc.

BTW, graphite manybe should print messages for blocking failures.

Any suggestions?

Thanks,
Mingjie