[graphite] Fix ICE in aermod.f90

[Richard Guenther]

On Tue, 20 Jan 2009, Sebastian Pop wrote:

> Hi,
> 
> The problem here is latent in trunk, but exposed in graphite branch by
> the fact that we have LIM scheduled just after Graphite.  The cleanup
> of the CFG does not maintain the loop closed SSA property, and thus we
> have to recompute it after the CFG cleanup.  Regstrap in progress on
> amd64-linux.  Okay for trunk once this finishes?

Are you sure?  It works for complete loop unrolling - maybe you forgot
to update virtual SSA form?

Btw, I recently noticed that you call update-ssa _way_ too often
and recompute dominators _way_ too often in graphite.c

Richard.