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Merge 46f9f887f7 into 5d7486115a

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JesseDebuger 2026-06-19 04:11:28 +00:00 • committed by GitHub
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22
passes/cmds/setundef.cc
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@ -355,6 +355,28 @@ struct SetundefPass : public Pass {
bits.append(worker.next_bit());
module->connect(RTLIL::SigSig(c, bits));
}
// Remove init attributes from undriven wires to prevent
// conflicts with the values we just assigned (issue #5835).
for (auto &c : sig.chunks()) {
if (c.wire && c.wire->attributes.count(ID::init)) {
if (c.wire->width == c.width && c.offset == 0) {
c.wire->attributes.erase(ID::init);
log("Removing init attribute from undriven wire %s.\n", log_id(c.wire));
} else {
Const &initval = c.wire->attributes[ID::init];
initval.resize(GetSize(c.wire), State::Sx);
for (int i = c.offset; i < c.offset + c.width; i++)
initval.set(i, State::Sx);
if (initval.is_fully_undef()) {
c.wire->attributes.erase(ID::init);
log("Removing init attribute from undriven wire %s.\n", log_id(c.wire));
} else {
log("Clearing init attribute bits [%d:%d] from partially undriven wire %s.\n",
c.offset + c.width - 1, c.offset, log_id(c.wire));
}
}
}
}
}
}