verilator/test_regress/t/t_gen_genblk.v

// 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

`define CONCAT(a, b) a``b
`define SHOW_LINED `CONCAT(show, `__LINE__)

bit fails;

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

  input clk;
  input reset_l;

  generate
    begin : direct_ignored
      show #(`__LINE__) show1 ();

      if (1) begin
        check #(`__LINE__, 1) show2 ();
      end
    end

    begin : empty_DISAGREE
      // DISAGREEMENT: if empty unnamed begin/end counts
      begin
      end

      if (1) begin
        check #(`__LINE__, 0) show2 ();
      end
    end

    begin : empty_named_DISAGREE
      // DISAGREEMENT: if empty named begin/end counts
      begin : empty_inside_named
      end

      if (1) begin
        check #(`__LINE__, 0) show2 ();
      end
    end

    begin : unnamed_counts
      // DISAGREEMENT: if unnamed begin/end counts
      begin
        show #(`__LINE__) show1 ();
      end

      if (1) begin
        check #(`__LINE__, 0) show2 ();
      end
    end

    begin : named_counts
      // DISAGREEMENT: if named begin/end counts
      begin : named
        show #(`__LINE__) show1 ();
      end

      if (1) begin
        check #(`__LINE__, 0) show2 ();
      end
    end

    begin : if_direct_counts
      if (0);
      else
      if (0);
      else if (1) show #(`__LINE__) show1 ();

      if (1) begin
        check #(`__LINE__, 2) show2 ();
      end
    end

    begin : if_begin_counts
      if (0) begin
      end
      else if (0) begin
        show #(`__LINE__) show1_NOT ();
      end
      else if (1) begin
        show #(`__LINE__) show1 ();
      end

      if (1) begin
        check #(`__LINE__, 2) show2 ();
      end
    end

    begin : if_named_counts
      if (1) begin : named
        show #(`__LINE__) show1 ();
        if (1) begin : subnamed
          show #(`__LINE__) show1s ();
        end
      end

      if (1) begin
        check #(`__LINE__, 2) show2 ();
      end
    end

    begin : begin_if_counts
      begin
        if (0) begin
        end
        else if (0) begin
          show #(`__LINE__) show1_NOT ();
        end
        else if (1) begin
          show #(`__LINE__) show1 ();
        end
      end
      // DISAGREEMENT: this could be genblk01
      if (1) begin
        check #(`__LINE__, 2) show2 ();
      end
    end

    begin : for_empty_counts
      // DISAGREEMENT: if empty genfor counts
      for (genvar g = 0; g < 1; ++g);

      if (1) begin
        check #(`__LINE__, 0) show2 ();
      end
    end

    begin : for_direct_counts
      for (genvar g = 0; g < 1; ++g) show #(`__LINE__) show1 ();

      if (1) begin
        check #(`__LINE__, 2) show2 ();
      end
    end

    begin : for_named_counts
      for (genvar g = 0; g < 1; ++g) begin : fornamed
        show #(`__LINE__) show1 ();
      end

      if (1) begin
        check #(`__LINE__, 2) show2 ();
      end
    end

    begin : for_begin_counts
      for (genvar g = 0; g < 1; ++g) begin
        show #(`__LINE__) show1 ();
      end

      if (1) begin
        check #(`__LINE__, 2) show2 ();
      end
    end

    begin : if_if
      if (0);
      else if (0) begin : namedb
      end
      else begin
        if (0) begin
        end
        else if (1) begin
          show #(`__LINE__) show1 ();
        end
      end

      if (1) begin
        check #(`__LINE__, 2) show2 ();
      end
    end

    begin : case_direct
      case (1)
        0: show #(`__LINE__) show1a_NOT ();
        1: show #(`__LINE__) show1 ();
        2: show #(`__LINE__) show1c_NOT ();
      endcase

      if (1) begin
        check #(`__LINE__, 2) show2 ();
      end
    end

    begin : case_begin_counts
      case (1)
        0: begin
          show #(`__LINE__) show1a_NOT ();
        end
        1: begin
          show #(`__LINE__) show1 ();
        end
        2: begin
          show #(`__LINE__) show1c_NOT ();
        end
      endcase

      if (1) begin
        check #(`__LINE__, 2) show2 ();
      end
    end

    begin : case_named_counts
      case (1)
        0: begin : subnamed
          show #(`__LINE__) show1a_NOT ();
        end
        1: begin : subnamed
          show #(`__LINE__) show1 ();
        end
        2: begin : subnamed
          show #(`__LINE__) show1c_NOT ();
        end
      endcase

      if (1) begin
        check #(`__LINE__, 2) show2 ();
      end
    end

  endgenerate

  int cyc;

  always @(posedge clk) begin
    cyc <= cyc + 1;
    if (cyc == 999) begin
      if (fails) $stop;
      else $write("*-* All Finished *-*\n");
      $finish;
    end

  end
endmodule

module show #(
    parameter LINE = 0
) ();
  // Each instance compares on unique cycle based on line number
  // so we get deterministic ordering (versus using an initial)
  always @(posedge t.clk) begin
    if (t.cyc == LINE) begin
      $display("%03d: got=%m", LINE);
    end
  end
endmodule

module check #(
    parameter LINE = 0,
    parameter EXP = 0
) ();
  string mod;
  int gennum;
  int pos;

  always @(posedge t.clk) begin
    if (t.cyc == LINE) begin
      mod = $sformatf("%m");

      gennum = 0;
      for (int pos = 0; pos < mod.len(); ++pos) begin
        if (mod.substr(pos, pos + 5) == "genblk") begin
          pos += 6;
          // verilator lint_off WIDTH
          gennum = mod[pos] - "0";
          // verilator lint_on WIDTH
          break;
        end
      end

      $write("%03d: got=%s exp=%0d gennum=%0d ", LINE, mod, EXP, gennum);
      if (EXP == 0) $display(" <ignored>");
      else if (gennum != EXP) begin
        $display(" %%Error");
        fails = 1;
      end
      else $display;

      $display;
    end
  end
endmodule