IPA ICF: enhance hash value calculated in TU

IPA ICF: enhance hash value calculated in TU

	* ipa-icf-gimple.h (return_with_result): Add missing colon to dump.
	* ipa-icf.c (sem_function::get_hash): Hash new declaration properties.
	(sem_item::add_type): New function.
	(sem_function::hash_stmt): Add TREE_TYPE of gimple_op.
	(sem_function::compare_polymorphic_p): Do not consider indirect calls.
	(sem_item_optimizer::update_hash_by_addr_refs): Add ODR type to hash.
	(sem_function::equals_wpa): Fix typo.
	* ipa-icf.h (sem_item::add_type): New function.
	(symbol_compare_hashmap_traits): Replace hashing of pointer with symbol
	order.

Co-Authored-By: Martin Liska <mliska@suse.cz>
From-SVN: r221645