verilator/test_regress/t/t_tri_pullup.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2008 Lane Brooks
// SPDX-License-Identifier: CC0-1.0

// verilog_format: off
module top (input A, input OE, output X, output Y, output Z);

  pullup p1(Z);
  assign Z = OE ? A : 1'bz;

  pulldown p2(Y);
  assign Y = OE ? A : 1'bz;

  pass pass(.A(A), .OE(OE), .X(X));
  pullup_module p(X);
endmodule

module pass (input A, input OE, inout X);
  io io(.A(A), .OE(OE), .X(X));
endmodule

module io (input A, input OE, inout X);
  assign X = (OE) ? A : 1'bz;
endmodule

module pullup_module (output X);
  pullup p1(X);
endmodule