2015-03-23  Paul Thomas  <pault@gcc.gnu.org>
	    Mikael Morin  <mikael@gcc.gnu.org>

	PR fortran/64952
fortran/
	* gfortran.h (struct symbol_attribute) : New field
	'array_outer_dependency'.
	* trans.h (struct gfc_ss_info): New field 'array_outer_dependency'.
	* module.c (enum ab_attribute): New value AB_ARRAY_OUTER_DEPENDENCY.
	(attr_bits): Append same value to initializer.
	(mio_symbol_attribute): Handle 'array_outer_dependency' attr
	in module read and write.
	* resolve.c (update_current_proc_outer_array_dependency): New function.
	(resolve_function, resolve_call): Add code to update current procedure's
	'array_outer_dependency' attribute.
	(resolve_variable): Mark current procedure with attribute
	array_outer_dependency if the variable is an array coming from outside
	the current namespace.
	(resolve_fl_procedure): Mark a procedure without body with attribute
	'array_outer_dependency'.
	* trans-array.c (gfc_conv_resolve_dependencies): If any ss is
	marked as 'array_outer_dependency' generate a temporary.
	(gfc_walk_function_expr): If the function may reference external arrays,
	mark the head gfc_ss with flag 'array_outer_dependency'.
testsuite/
	* gfortran.dg/elemental_dependency_4.f90: New.
	* gfortran.dg/elemental_dependency_5.f90: New.


Co-Authored-By: Mikael Morin <mikael@gcc.gnu.org>

From-SVN: r221586