Convert IPA CP to symbol_summary.

Convert IPA CP to symbol_summary.

2018-06-08  Martin Liska  <mliska@suse.cz>

	* ipa-cp.c (ipcp_store_bits_results): Use
	ipcp_transformation_sum.
	(ipcp_store_vr_results): Likewise.
	* ipa-prop.c (ipcp_grow_transformations_if_necessary): Renamed
	to ...
	(ipcp_transformation_initialize): ... this.
	(ipa_set_node_agg_value_chain):
	(ipa_node_params_t::duplicate): Use ipcp_transformation_sum.
	(write_ipcp_transformation_info): Likewise.
	(read_ipcp_transformation_info): Likewise.
	(ipcp_update_bits): Likewise.
	(ipcp_update_vr): Likewise.
	(ipcp_transform_function): Likewise.
	* ipa-prop.h: Rename ipcp_transformation_summary to
	ipcp_transformation.
	(class ipcp_transformation_t): New function summary.
	(ipcp_get_transformation_summary): Use ipcp_transformation_sum.
	(ipa_get_agg_replacements_for_node): Likewise.

From-SVN: r261314