On Tue, Sep 29, 2009 at 8:23 PM, David Edelsohn <dje....@gmail.com> wrote: > On Thu, Aug 20, 2009 at 4:48 AM, Richard Guenther > <richard.guent...@gmail.com> wrote: > >> Can't we use graphite to re-roll loops? That is, compress the >> polyhedron by introducing a new parameter? But maybe I am >> not good at guessing what your initial bloat issue looks like. >> >> The reason I'm asking is that there is enough code out in the >> wild that has loops with manually unrolled bodies - I have seen >> up to 16 times here. > > Do we want to try to address this partially in GCC 4.5? Providing > some way to disable early unrolling either explicitly or implicitly > when Graphite is enabled? > > Early unrolling can cause two problems: > > 1) Increase the size of SCoPs, which increases memory consumption and > analysis time. > > 2) Confusing SCoP analysis. > > Separate from re-rolling and other long-term solutions, it would be > helpful for Graphite if there was some explicit control over early > unrolling to help with experimentation.
I can definitely look into that - can someone open a bugreport and assign it to me please? Thanks, RIchard. > Thanks, David >
