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Re: -O3 and new optimizations in 4.4.0
On Fri, Apr 24, 2009 at 08:30:37AM -0500, Sebastian Pop wrote:
> On Fri, Apr 24, 2009@08:12, Robert Dewar <dewar@adacore.com> wrote:
> >> What would we have to do to make PPL and CLooG required to build GCC?
> >
> > Why would that be desirable? Seems to me the current situation is
> > clearly preferable.
>
> To enable loop transforms in -O3.
>
> Sebastian Pop
> --
> AMD - GNU Tools
>
Sebastian,
I assume you are talking about enabling these optimizations
in -O3 for gcc 4.5. Unless the alias improvement changes
are backported for gcc 4.4.1, the graphite optimizations
will yield performance degradations for the polyhedron 2005
benchmarks at -O3 in that case.
Jack