yosys/tests/simple/attrib04_net_var.v

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module bar(clk, rst, inp, out);
input wire clk;
input wire rst;
input wire inp;
output reg out;
(* this_is_a_prescaler *)
reg [7:0] counter;
(* temp_wire *)
wire out_val;
always @(posedge clk)
counter <= counter + 1;
assign out_val = inp ^ counter[4];
always @(posedge clk)
if (rst) out <= 1'd0;
else out <= out_val;
endmodule
module foo(clk, rst, inp, out);
input wire clk;
input wire rst;
input wire inp;
output wire out;
bar bar_instance (clk, rst, inp, out);
endmodule