gcc/
	* ipa-icf.h (symbol_compare_hash): New class.
	(symbol_compare_hashmap_traits): Use it.
	* mem-stats.h (mem_alloc_description::mem_location_hash): New class.
	(mem_alloc_description::mem_alloc_hashmap_traits): Use it.
	(mem_alloc_description::reverse_mem_map_t): Remove redundant
	default_hashmap_traits.
	* sanopt.c (sanopt_tree_triplet_hash): New class.
	(sanopt_tree_triplet_map_traits): Use it.

From-SVN: r224974