yosys/tests/opt/opt_share_large_pmux_cat.v

module opt_share_test(
	input [15:0]			a,
	input [15:0]			b,
	input [15:0]			c,
	input [2:0]				sel,
	output reg [31:0] res
	);

	always @* begin
		case(sel)
			0: res = {a + b, a};
			1: res = {a - b, b};
			2: res = {a + c, c};
			3: res = {a - c, a};
			4: res = {b, b};
			5: res = {c, c};
			default: res = 32'bx;
		endcase
	end

endmodule