tests/various/constmsk_test.v - third_party/yosys - Git at Google

 module test(input [3:0] A, output [3:0] Y1, Y2);
     assign Y1 = |{A[3], 1'b0, A[1]};
     assign Y2 = |{A[2], 1'b1, A[0]};
 endmodule
	module test(input [3:0] A, output [3:0] Y1, Y2);
	assign Y1 = \|{A[3], 1'b0, A[1]};
	assign Y2 = \|{A[2], 1'b1, A[0]};
	endmodule