verilator/test_regress/t/t_opt_const_dfg.py

#!/usr/bin/env python3
# DESCRIPTION: Verilator: Verilog Test driver/expect definition
#
# Copyright 2024 by Wilson Snyder. This program is free software; you
# can redistribute it and/or modify it under the terms of either the GNU
# Lesser General Public License Version 3 or the Perl Artistic License
# Version 2.0.
# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0

import vltest_bootstrap

test.scenarios('simulator')
test.top_filename = "t/t_opt_const.v"

test.compile(verilator_flags2=["-Wno-UNOPTTHREADS", "--stats", test.t_dir + "/t_opt_const.cpp"])

test.execute()

if test.vlt:
    test.file_grep(test.stats, r'Optimizations, Const bit op reduction\s+(\d+)', 40)

test.passes()