verilator/test_regress/t/t_order_wireloop.py

25 lines
892 B
Python
Executable File

#!/usr/bin/env python3
# DESCRIPTION: Verilator: Verilog Test driver/expect definition
#
# 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-FileCopyrightText: 2024 Wilson Snyder
# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
import vltest_bootstrap
test.scenarios('simulator')
test.compile(fails=test.vlt_all, verilator_flags2=["-fno-dfg"])
# Used to be %Error: t/t_order_wireloop.v:\d+: Wire inputs its own output, creating circular logic .wire x=x.
# However we no longer gate optimize this
# Can't use expect_filename here as unstable output
test.file_grep(
test.compile_log_filename,
r"%Warning-UNOPTFLAT: t/t_order_wireloop.v:\d+:\d+: Signal unoptimizable: Circular combinational logic: \'t.foo\'"
)
test.passes()