[patch, fortran] Index interchange for FORALL and DO CONCURRENT

[Bernhard Reutner-Fischer]

On Tue, Oct 31, 2017 at 09:30:27PM +0100, Thomas Koenig wrote:

> > Or maybe emit diagnostics into the frontend optimize dump file and scan
> > that?
> 
> If we could check the Fortran tree dumps with dejagnu, that would be
> doable. Unfortunately, we don't have that in place.

Well that should be rather easy.
Don't we have a basic scan-dump where we can pass the file as well as a
regexp? I might look into this later.
> 
> This would be the difference between
> 
> DO CONCURRENT test_do_speed:k 1:512:1,test_do_speed:j
> 1:512:1,test_do_speed:i 1:512:1()
> 
> and
> 
> DO CONCURRENT test_do_speed:i 1:512:1,test_do_speed:j
> 1:512:1,test_do_speed:k 1:512:1()
> 
> Just about the only way I can think of is to add a warning
> option if something is actually interchanged. Might be worth
> doing anyway, but I would like not to add too many -W options.
> 
> -fopt-info would be nice to have here (PR 66576). I had a
> preliminary look at what it does for gcc, but after a look
> at the source, I decided that this was not really self-explanatory
> and that I'd rather do other things :-)

ah right that would be a good idea, too.

Thanks for the explanation!

cheers,