[patch, fortran] PR fortran/36928 - array dependencies

[Thomas Koenig]

Tobias Burnus wrote:

> You should add a short comment on the algorithm thus one can quickly
> check it, e.g.
> "No dependency if reminder of (l_start - r_start)/gcd(l_stride,
> r_stride)) is nonzero."
> At least it took me a short while to translate the GMP functions into
> the string above.
> 
> (Additionally, I felt better, if you would add a run-test and include
> also some checks that the temporary is still generated in some commen
> cases. I am always worrying that on introduces bugs in such cases.)

I introduced some correctness checks in an additional test case (see
below).

> > Regression-tested on x86_64-unknown-linux-gnu.  OK for trunk?
> >   
> OK with considering the nit above.

Waiting for Emacs...
Sende          fortran/ChangeLog
Sende          fortran/dependency.c
Sende          testsuite/ChangeLog
Hinzufügen     testsuite/gfortran.dg/array_assignment_1.F90
Hinzufügen     testsuite/gfortran.dg/dependency_27.f90
Ãœbertrage Daten .....
Revision 160085 übertragen.

Here's what I committed.

Thanks for the review!

	Thomas

2010-05-31  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/36928
	* dependency.c (gfc_check_section_vs_section):  Check
	for interleaving array assignments without conflicts.

2010-05-31  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/36928
	* gfortran.dg/dependency_27.f90:  New test.
	* gfortran.dg/array_assign_1.F90:  New test.


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