re PR middle-end/50260 (internal compiler error: Segmentation fault  at ../../gcc/gcc/tree-ssa-live.c:88)

	PR middle-end/50260
	* ipa-split.c (split_function): Call add_referenced_var.

	* tree-ssa-phiopt.c (cond_store_replacement): Don't call get_var_ann.
	(cond_if_else_store_replacement_1): Ditto.
	* tree-ssa-pre.c (get_representative_for): Ditto.
	(create_expression_by_pieces): Ditto.
	(insert_into_preds_of_block): Ditto.
	* tree-sra.c (create_access_replacement): Ditto.
	(get_replaced_param_substitute): Ditto.

From-SVN: r178489