gcc/
	* tree-hash-traits.h: New file.
	(tree_operand_hash): New class.
	* sanopt.c: Include tree-hash-traits.h.
	(sanopt_tree_map_traits): Use tree_operand_hash.
	* tree-if-conv.c: Include tree-hash-traits.h.
	(phi_args_hash_traits): Use tree_operand_hash.
	* tree-ssa-uncprop.c: Include tree-hash-traits.h.
	(val_ssa_equiv_hash_traits): Use tree_operand_hash.

From-SVN: r224967