2019-11-14  Martin Liska  <mliska@suse.cz>

	* ipa-icf.c (sem_item_optimizer::execute): Save
	loaded_symbols.
	(sem_item_optimizer::parse_nonsingleton_classes):
	Return number of loaded symbols.
	(sem_item_optimizer::merge_classes): Print
	statistics about totally needed symbols.
	* ipa-icf.h (parse_nonsingleton_classes): Change return
	type.
	(merge_classes): Add one argument.

From-SVN: r278209