// DESCRIPTION: Verilator: Verilog Test module
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2020 Wilson Snyder
// SPDX-License-Identifier: CC0-1.0

// bug477

module t (
    input rst_n,
    input clk,
    output out
);

  submod #(.STAGES(5)) u2 (.*);

endmodule

module submod (  /*AUTOARG*/
    // Outputs
    out,
    // Inputs
    rst_n,
    clk
);

  parameter STAGES = 4;

  input rst_n;
  input clk;
  output out;

  reg [STAGES-1:0] r_rst;

  generate
    // for i=0..5  (5+1-1)
    for (genvar i = 0; i < STAGES + 1 - 1; i = i + 1) begin
      always @(posedge clk or negedge rst_n) begin
        if (~rst_n) r_rst[i] <= 1'b0;
        else begin
          if (i == 0) r_rst[i] <= 1'b1;
          else r_rst[i] <= r_rst[i-1];  // i=0, so -1 wraps to 7
        end
      end
    end
  endgenerate

  wire out = r_rst[STAGES-1];

endmodule