Add operand ranges to op1_op2_relation API.

Add operand ranges to op1_op2_relation API.

With additional floating point relations in the pipeline, we can no
longer tell based on the LHS what the relation of X < Y is without knowing
the type of X and Y.

	* gimple-range-fold.cc (fold_using_range::range_of_range_op): Add
	ranges to the call to relation_fold_and_or.
	(fold_using_range::relation_fold_and_or): Add op1 and op2 ranges.
	(fur_source::register_outgoing_edges): Add op1 and op2 ranges.
	* gimple-range-fold.h (relation_fold_and_or): Adjust params.
	* gimple-range-gori.cc (gori_compute::compute_operand_range): Add
	a varying op1 and op2 to call.
	* range-op-float.cc (range_operator::op1_op2_relation): New dafaults.
	(operator_equal::op1_op2_relation): New float version.
	(operator_not_equal::op1_op2_relation): Ditto.
	(operator_lt::op1_op2_relation): Ditto.
	(operator_le::op1_op2_relation): Ditto.
	(operator_gt::op1_op2_relation): Ditto.
	(operator_ge::op1_op2_relation) Ditto.
	* range-op-mixed.h (operator_equal::op1_op2_relation): New float
	prototype.
	(operator_not_equal::op1_op2_relation): Ditto.
	(operator_lt::op1_op2_relation): Ditto.
	(operator_le::op1_op2_relation): Ditto.
	(operator_gt::op1_op2_relation): Ditto.
	(operator_ge::op1_op2_relation): Ditto.
	* range-op.cc (range_op_handler::op1_op2_relation): Dispatch new
	variations.
	(range_operator::op1_op2_relation): Add extra params.
	(operator_equal::op1_op2_relation): Ditto.
	(operator_not_equal::op1_op2_relation): Ditto.
	(operator_lt::op1_op2_relation): Ditto.
	(operator_le::op1_op2_relation): Ditto.
	(operator_gt::op1_op2_relation): Ditto.
	(operator_ge::op1_op2_relation): Ditto.
	* range-op.h (range_operator): New prototypes.
	(range_op_handler): Ditto.