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Add warnings for driver-driver conflicts between FFs (and other cells) and constants

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This commit is contained in:
Clifford Wolf 2017-12-12 17:13:27 +01:00
parent ba90e08398
commit ca2adc30c9
2 changed files with 11 additions and 3 deletions
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9
passes/opt/opt_clean.cc
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@ -91,9 +91,16 @@ void rmunused_module_cells(Module *module, bool verbose)
Cell *cell = it.second;
for (auto &it2 : cell->connections()) {
if (!ct_all.cell_known(cell->type) || ct_all.cell_output(cell->type, it2.first))
for (auto bit : sigmap(it2.second))
for (auto raw_bit : it2.second) {
if (raw_bit.wire == nullptr)
continue;
auto bit = sigmap(raw_bit);
if (bit.wire == nullptr)
log_warning("Driver-driver conflict for %s between cell %s.%s and constant %s in %s: Resolved using constant.\n",
log_signal(raw_bit), log_id(cell), log_id(it2.first), log_signal(bit), log_id(module));
if (bit.wire != nullptr)
wire2driver[bit].insert(cell);
}
}
if (keep_cache.query(cell))
queue.insert(cell);