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authorClifford Wolf <clifford@clifford.at>2014-02-16 21:58:27 +0100
committerClifford Wolf <clifford@clifford.at>2014-02-16 21:58:27 +0100
commit28e14ee50a3effcd5335ec06f5b1c2acda008a4e (patch)
treebbf1903d6c0a53918955210e5b508f39e10c3570
parent7d7e068dd1c5e04cf0c2b9e18abade2b49fe677e (diff)
Fixed handling of "keep" attribute on wires in opt_clean
-rw-r--r--passes/opt/opt_clean.cc4
1 files changed, 2 insertions, 2 deletions
diff --git a/passes/opt/opt_clean.cc b/passes/opt/opt_clean.cc
index 733a1cbf..d330fb7b 100644
--- a/passes/opt/opt_clean.cc
+++ b/passes/opt/opt_clean.cc
@@ -227,10 +227,10 @@ static void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool
std::vector<RTLIL::Wire*> del_wires;
for (auto &it : module->wires) {
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;
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);
} else {
s1.expand();