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cxxrtl: mark dead local wires as unused even with inlining disabled. 

Fixes #2739.
This commit is contained in:
whitequark 2021-07-15 22:27:27 +00:00
parent 1aab608cff
commit 54b6cb645f
1 changed files with 6 additions and 4 deletions
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10
backends/cxxrtl/cxxrtl_backend.cc
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@ -2733,12 +2733,14 @@ struct CxxrtlWorker {
for (auto wire : module->wires()) {
auto &wire_type = wire_types[wire];
if (!wire_type.is_local()) continue;
if (!wire->name.isPublic() && !inline_internal) continue;
if (wire->name.isPublic() && !inline_public) continue;
if (live_wires[wire].empty()) {
wire_type = {WireType::UNUSED}; // wire never used
} else if (flow.is_inlinable(wire, live_wires[wire])) {
continue;
}
if (!wire->name.isPublic() && !inline_internal) continue;
if (wire->name.isPublic() && !inline_public) continue;
if (flow.is_inlinable(wire, live_wires[wire])) {
if (flow.wire_comb_defs[wire].size() > 1)
log_cmd_error("Wire %s.%s has multiple drivers!\n", log_id(module), log_id(wire));
log_assert(flow.wire_comb_defs[wire].size() == 1);