diff options
Diffstat (limited to 'backends')
| -rw-r--r-- | backends/cxxrtl/cxxrtl_backend.cc | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/backends/cxxrtl/cxxrtl_backend.cc b/backends/cxxrtl/cxxrtl_backend.cc index b6cc4bb6d..0071bda7f 100644 --- a/backends/cxxrtl/cxxrtl_backend.cc +++ b/backends/cxxrtl/cxxrtl_backend.cc @@ -1518,6 +1518,8 @@ struct CxxrtlWorker { if (!sync->signal.empty()) { sync_bit = sync->signal[0]; sync_bit = sigmaps[sync_bit.wire->module](sync_bit); + if (!sync_bit.is_wire()) + continue; // a clock, or more commonly a reset, can be tied to a constant driver } pool<std::string> events; @@ -2285,6 +2287,8 @@ struct CxxrtlWorker { void register_edge_signal(SigMap &sigmap, RTLIL::SigSpec signal, RTLIL::SyncType type) { signal = sigmap(signal); + if (signal.is_fully_const()) + return; // a clock, or more commonly a reset, can be tied to a constant driver log_assert(is_valid_clock(signal)); log_assert(type == RTLIL::STp || type == RTLIL::STn || type == RTLIL::STe); |