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-rw-r--r--passes/hierarchy/submod.cc7
1 files changed, 7 insertions, 0 deletions
diff --git a/passes/hierarchy/submod.cc b/passes/hierarchy/submod.cc
index 212932e46..7952c2dd6 100644
--- a/passes/hierarchy/submod.cc
+++ b/passes/hierarchy/submod.cc
@@ -162,6 +162,13 @@ struct SubmodWorker
new_wire->port_input = new_wire_port_input;
new_wire->port_output = new_wire_port_output;
new_wire->attributes = wire->attributes;
+ if (new_wire->port_output) {
+ auto it = wire->attributes.find(ID(init));
+ if (it != wire->attributes.end()) {
+ new_wire->attributes[ID(init)] = it->second[bit.offset];
+ it->second[bit.offset] = State::Sx;
+ }
+ }
if (new_wire->port_input && new_wire->port_output)
log(" signal %s: inout %s\n", wire->name.c_str(), new_wire->name.c_str());