requirements for graphite & loop-block

Jonathan Wakely
Mon Apr 3 13:29:00 GMT 2017

On 3 April 2017 at 00:25, L A Walsh wrote:
> The loop-block optimization say it needs cloog + ppl for
> graphite -- but I saw an email from July 2012, Jonathan Wakely,
> that says the trunk was using isl, so ppl wasn't needed.
> Does that imply that 5 years later, what was in trunk might
> be in the mainstream releases?  I.e. what, besides
> cloog is needed, "today" for building the graphite optimizers,
> ppl or isl?

Just ISL, not cloog or ppl, as documented:

That's for trunk, for a specific release see the docs included in the
release sources. No currently supported release needs cloog or ppl.
GCC 4.9 needed isl and cloog.

> If isl, should the manpage text for loop-block saying
> that ppl is required be updated?

It already has been:

           Perform loop nest optimizations.  Same as
-floop-nest-optimize.  To use this code transformation, GCC has to be
configured with --with-isl to enable the Graphite loop transformation

If you look at the manpage for an old release then you'll see the
requirements for the old release.

More information about the Gcc-help mailing list