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Fixed handling of "keep" attribute on wires in opt_clean

This commit is contained in:
Clifford Wolf 2014-02-16 21:58:27 +01:00
parent 7d7e068dd1
commit 28e14ee50a
1 changed files with 2 additions and 2 deletions
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4
passes/opt/opt_clean.cc
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@ -227,10 +227,10 @@ static void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool
std::vector<RTLIL::Wire*> del_wires; std::vector<RTLIL::Wire*> del_wires;
for (auto &it : module->wires) { for (auto &it : module->wires) {
RTLIL::Wire *wire = it.second; RTLIL::Wire *wire = it.second;
if ((!purge_mode && check_public_name(wire->name)) || wire->port_id != 0) { if ((!purge_mode && check_public_name(wire->name)) || wire->port_id != 0 || wire->get_bool_attribute("\\keep")) {
RTLIL::SigSpec s1 = RTLIL::SigSpec(wire), s2 = s1; RTLIL::SigSpec s1 = RTLIL::SigSpec(wire), s2 = s1;
assign_map.apply(s2); assign_map.apply(s2);
if (!used_signals.check_any(s2) && wire->port_id == 0) { if (!used_signals.check_any(s2) && wire->port_id == 0 && !wire->get_bool_attribute("\\keep")) {
del_wires.push_back(wire); del_wires.push_back(wire);
} else { } else {
s1.expand(); s1.expand();