tests/UnitLibrary/top.v - third_party/Surelog - Git at Google

 module top();
 adder a1();
 adder a2();

 wtop wtop();

 endmodule

 module m();
 // rtl
 endmodule
	module top();
	adder a1();
	adder a2();

	wtop wtop();

	endmodule

	module m();
	// rtl
	endmodule