| /* | |
| * Copyright (C) 2020 The SymbiFlow Authors. | |
| * | |
| * Use of this source code is governed by a ISC-style | |
| * license that can be found in the LICENSE file or at | |
| * https://opensource.org/licenses/ISC | |
| */ | |
| /* | |
| * `output wire o` should be detected as a clock because of the `(* CLOCK *)` | |
| * attribute. | |
| */ | |
| (* whitebox *) | |
| module BLOCK(a, b, o); | |
| input wire a; | |
| input wire b; | |
| (* CLOCK *) | |
| output wire o; | |
| endmodule |