2019-10-30  Martin Liska  <mliska@suse.cz>

	* fold-const.c (operand_equal_p): Move to ...
	(operand_compare::operand_equal_p): ... here.
	(operand_compare::verify_hash_value): New.
	(add_expr): Move to ...
	(operand_compare::hash_operand): ... here.
	* fold-const.h (operand_equal_p): Move to the class.
	(class operand_compare): New.
	* tree.c (add_expr): Remove.

From-SVN: r277614