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
