Re: [PATCH 0/3] Move Graphite to CLooG 0.16.3 with isl backend.

[Tobias Grosser <tobias at grosser dot es>]

On 07/27/2011 06:20 PM, Jack Howarth wrote:
> On Fri, Jul 22, 2011 at 01:00:09AM +0200, Tobias Grosser wrote:
> > Hi,
> >
> > I propose to switch to the official cloog.org cloog version with isl backend and
> > at the same time to remove support for both CLooG-PPL legacy as well as
> > CLooG-Parma.
> >
> > We want to switch to cloog-isl as it is the only officially maintained version
> > of cloog. Furthermore, it provides features that will help to fix some bugs in
> > the graphite code generation[1].
> > The reason to abond CLooG-PPL (legacy version) is, that cloog-isl provides the
> > new CloogInput library interface. This interface is not available the old CLooG.
> > I plan to move graphite to this interface. As I do not see enough benefits from
> > being able to use CLooG PPL, I decided to not introduce any compatibility
> > scheme, but just remove any code that is only needed for CLooG-PPL.
> > I also removed CLooG-Parma (cloog.org with PPL backend), as it is currently not
> > actively maintained and not well tested. I believe our time is better spent on
> > improving graphite or cloog isl, as in putting time into this cloog version.
> >
> > So here we are: Moving graphite back to the official cloog.org version!
> >
> > Passes 'make check RUNTESTFLAGS=graphite.exp' as well as a bootstrap on Linux
> > amd64.
> >
> > Cheers
> > Tobi
>
> Tobi,
>     Are there any additional plans for gcc 4.7? In particular, wasn't the -fgraphite-identity
> option supported to be enabled at -O3 by defaulting ftree-loop-linear on which is now an alias
> of -floop-interchange since gcc 4.6?
>                    Jack

Hi Jack,

I personally do not have any fixed plans for something that needs to be 
in 4.7. Here is a list of open topics, that will be fixed if time allows 
(or someone funds my time):

- Remove dependency to PPL (as Richi mentioned)
- Integrate region based scop detection
- Use isl scheduling (Pluto like) to automatically tile the code
- Integrate Konrad's data flow patches (if he submits them)

Cheers
Tobi