[patch, fortran] PR 50554 - redefinition of index variable with inquire(iolength=...)

[Thomas Koenig]

Hello world,

the attached patch raises an error if an index variable is redefined
with inquire(iolength=...).

OK for trunk?

	Thomas

2013-06-27  Thomas Koenig  <tkoenig@gcc.gnu.org>

         PR fortran/50554
         * frontend-passes.c (doloop_code): Check do loop variables for
         EXEC_IOLENGTH.
         (do_function):  Whitespace fix.
         (gfc_code_walker):  Handle EXEC_IOLENGTH.

2013-06-27  Thomas Koenig  <tkoenig@gcc.gnu.org>

         PR fortran/50554
         * gfortran.dg/do_check_9.f90:  New test.
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