[PATCH] allow deferred-shape pointers in OpenACC data clauses

[Thomas Koenig]

Am 14.07.2017 um 16:11 schrieb Cesar Philippidis:
> This patch teaches the fortran FE to allow deferred-shape pointers to be
> used in OpenACC data clauses. While the spec states that arrays must be
> contiguous, I believe that is a run-time requirement, not a compile
> time. The intent behind OpenACC is to have the programmer sprinkle a
> minimum amount of ACC directives on their existing code base, and have
> the compiler generate offloading code. In this case, the deferred-shape
> pointer check was preventing working code from compiling.

It is possible to declare a pointer with the contiguous attribute.
Is there a reason that this cannot be used in general=

> I was considering relaxing the error to a warning, but I ended up
> deciding this should be a run-time failure, if there is one.

What happens - silent wrong-code or indeed a run-time error which
lets the user know what is wrong?

> Is this OK for trunk? I tested it on x86_64 with nvptx offloading.

Does any of the gfortran maintaiers have access to a machine which
allows nvptx offloading?  I lack both the hardware and the know-how :-)

Regards

	Thomas