re PR fortran/36854 ([meta-bug] fortran front-end optimization)

re PR fortran/36854 ([meta-bug] fortran front-end optimization)

2010-08-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/36854
	* dependency.h:  Add prototype for gfc_are_identical_variables.
	* frontend-passes.c:  Include depencency.h.
	(optimimize_equality):  Use gfc_are_identical_variables.
	* dependency.c (identical_array_ref): New function.
	(gfc_are_identical_variables):  New function.
	(gfc_deb_compare_expr):  Use gfc_are_identical_variables.
	* dependency.c (gfc_check_section_vs_section).  Rename gfc_
	prefix from statc function.
	(check_section_vs_section): Change arguments to gfc_array_ref,
	adjust function body accordingly.

2010-08-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/36854
	* gfortran.dg/character_comparison_2.f90:  New test.
	* gfortran.dg/character_comparison_3.f90:  New test.
	* gfortran.dg/dependency_28.f90:  New test.

From-SVN: r162824