verilator/test_regress/t/t_lint_unused_bad.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed into the Public Domain, for any use,
// without warranty, 2010 by Wilson Snyder.

module t (/*AUTOARG*/
   // Outputs
   out,
   // Inputs
   in
   );

   input in;  // inputs don't get flagged as undriven
   output out;  // outputs don't get flagged as unused

   wire  out = in;

   sub sub ();

endmodule

module sub;

   wire pub /*verilator public*/;   // Ignore publics

   wire [5:0] assunu1 = 0;  // Assigned but unused

   wire [3:0] assunub2 = 0;  // Assigned but bit 2 unused

   wire [15:10] udrb2;  // [14:13,11] is undriven
   assign udrb2[15] = 0;
   assign udrb2[12] = 0;
   assign udrb2[10] = 0;
   
   wire       unu3;  // Totally unused

   localparam THREE = 3;

   initial begin
      if (0 && assunu1[0] != 0 && udrb2 != 0) begin end
      if (0 && assunub2[THREE] && assunub2[1:0]!=0) begin end
   end
endmodule