[PATCH 5/6] [GOMP4] OpenACC 1.0+ support in fortran front-end

[Tobias Burnus]

Some general questions to the patch set:

* I miss "-fopenacc". Is the support already in the branch? I assume 
that part is then in c-family/c.opt fortran/lang.opt?

* Documentation: Do you also need to update fortran/gfortran.texi and/or 
fortran/invoke.texi? (I assume that -fopenacc is already documented in 
docs/invoke.texi) [Search for openmp to find possible spots.]

* Intrinsic module "openacc" and "openacc_lib.h": I assume that those 
will be created as follow up - or do they already exist? If so, do you 
need to document something in fortran/intrinsic.texi? Or in libgomp.texi?


Ilmir Usmanov wrote:
>     OpenACC 1.0 fortran FE support -- tests.
>
>     gcc/testsuite/gfortran.dg/goacc/
>     * goacc.exp: New test directory.
> +++ b/gcc/testsuite/gfortran.dg/goacc/branch.f95
> @@ -0,0 +1,55 @@
> +! { dg-do compile }
> +! { dg-options "-fopenacc" }

Is there a reason that you don't automatically add that flag via goacc.exp?


> +! { dg-final { scan-tree-dump "pragma acc data" "original" } }
> +! { dg-final { scan-tree-dump "if" "original" } }

This one looks rather general. Shouldn't use narrow it down a bit, e.g. 
by using "scan-tree-dump-times"?

> +! { dg-final { scan-tree-dump "to" "original" } }
> +! { dg-final { scan-tree-dump "from" "original" } }
> +! { dg-final { scan-tree-dump "alloc" "original" } }

Ditto. Also spaces before/after the pattern should make it more unique.

> --- /dev/null
> +++ b/gcc/testsuite/gfortran.dg/goacc/goacc.exp
> @@ -0,0 +1,36 @@
> +# Load support procs.
> +load_lib gfortran-dg.exp
> +
> +if ![check_effective_target_fopenmp] {
> +  return
> +}

I assume that this should be indeed "fopenmp" here and not "fopenacc" as 
both share libgomp?

> +# Main loop.
> +gfortran-dg-runtest [lsort \
> +       [find $srcdir/$subdir *.\[fF\]{,90,95,03,08} ] ] " -fopenacc -fdump-parse-tree"

As you use -fopenacc here, you probably can get rid of it in dg-options. 
Can't you? I am not sure whether -fdump-parse-tree is needed; on the 
other hand, it just clutters the *log files.


As -fopenmp seemingly can be mixed with -fopenacc, I think it would be 
nice to have some test cases where !$omp and !$acc are both placed - in 
either order - before the same Fortran statement.

Tobias