[patch, fortran] PR 56937 - temporaries with array indices

[Thomas Koenig]

Hello world,

the attached patch fixes two cases of unnecessary array temporaries
when vector indices were involved.  When we saw something like that,
we gave up even if

- The vector indices were equal
- The vector indices didn't matter at all because, in a different
   dimension, things were known to be different.

Regression-tested.  OK for trunk?

	Thomas

2013-07-20  Thomas Koenig  <tkoenig@gcc.gnu.org>

         PR fortran/56937
         * dependency.c (gfc_dep_resolver):  Treat identical
         array subscripts as identical; don't unconditionally
         return a dependency if an array subscript is found.

2013-07-20  Thomas Koenig  <tkoenig@gcc.gnu.org>

         PR fortran/56937
         * gfortran.dg/dependency_42.f90:  New test.
         * gfortran.dg/dependency_43.f90:  New test.
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