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hierarchy: Derive abstract cells in top mod

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Previously abstract cells would only be derived if there was no top module declared, this means that `-check` would miss certain kinds of errors that it would normally detect.  This fixes #4927.
This commit is contained in:
Krystine Sherwin 2025-03-07 10:12:29 +13:00
parent 5748b37b1c
commit 913ac04764
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1 changed files with 11 additions and 0 deletions
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11
passes/hierarchy/hierarchy.cc
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@ -1066,6 +1066,17 @@ struct HierarchyPass : public Pass {
mod->attributes[ID::initial_top] = RTLIL::Const(1);
else
mod->attributes.erase(ID::initial_top);
std::vector<IdString> abstract_ids;
for (auto cell : top_mod->cells()) {
IdString abstract_id = "$abstract" + cell->type.str();
if (design->module(cell->type) == nullptr && design->module(abstract_id))
abstract_ids.push_back(abstract_id);
}
for (auto abstract_id : abstract_ids)
design->module(abstract_id)->derive(design, {});
for (auto abstract_id : abstract_ids)
design->remove(design->module(abstract_id));
}
bool did_something = true;