// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain, for
// any use, without warranty, 2025 by Wilson Snyder.
// SPDX-License-Identifier: CC0-1.0

module t (  /*AUTOARG*/
  // Inputs
  clk, reset_l, in, enable
  );
  input clk;
  input reset_l;
  input in;
  input enable;

  logic ok1 = 1;
  logic ok2 = 1;
  logic ok3 = ok2;

  initial begin
    ok1 = 1;
  end

  //== Faulty example

  logic flop_out = 1;  // <--- Warning

  always @(posedge clk, negedge reset_l) begin
    if (enable) begin
      flop_out <= ~in;  // <--- Use of initialized
    end
  end

  //== Fixed example

  logic flop2_out;

  always @(posedge clk, negedge reset_l) begin
    if (!reset_l) begin
      flop2_out <= '1;  // <--- Added reset init
    end
    else if (enable) begin
      flop2_out <= ~in;
    end
  end

  // Combo version
  logic bad_comb = 1;  // but this is not fine

  always @* begin
    bad_comb = ok2;
  end

  wire _unused_ok = &{1'b0, flop_out, flop2_out, bad_comb, ok1, ok2, ok3};

endmodule