Ensure arguments to range-op handler are supported.

Ensure arguments to range-op handler are supported.

	PR tree-optimization/107985
	gcc/
	* gimple-range-op.cc
	(gimple_range_op_handler::gimple_range_op_handler): Check if type
	of the operands is supported.
	* gimple-range.cc (gimple_ranger::prefill_stmt_dependencies): Do
	not assert if here is no range-op handler.

	gcc/testsuite/
	* g++.dg/pr107985.C: New.