trans.h (struct gfc_ss, [...]): Move field expr from the former struct to the latter.

trans.h (struct gfc_ss, [...]): Move field expr from the former struct to the latter.

	* trans.h (struct gfc_ss, struct gfc_ss_info): Move field expr from
	the former struct to the latter.
	* trans-array.c
	(gfc_get_array_ss, gfc_get_scalar_ss,
	gfc_trans_constant_array_constructor, gfc_trans_array_constructor,
	gfc_add_loop_ss_code, gfc_conv_ss_descriptor,
	gfc_trans_array_bound_check, gfc_conv_array_index_offset,
	gfc_conv_scalarized_array_ref, gfc_conv_ss_startstride,
	gfc_could_be_alias, gfc_conv_resolve_dependencies,
	gfc_conv_loop_setup, gfc_conv_expr_descriptor,
	gfc_alloc_allocatable_for_assignment): Update references to expr and
	factor common reference chains where possible.
	* trans-const.c (gfc_conv_constant): Ditto.
	* trans-expr.c (gfc_conv_variable, gfc_conv_procedure_call,
	gfc_conv_array_constructor_expr, gfc_conv_expr,
	gfc_conv_expr_reference): Ditto.
	* trans-intrinsic.c (trans_this_image, gfc_conv_intrinsic_bound,
	gfc_conv_intrinsic_cobound, gfc_conv_intrinsic_funcall,
	gfc_add_intrinsic_ss_code): Ditto.
	* trans-stmt.c (gfc_conv_elemental_dependencies): Ditto.

From-SVN: r180868