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In hash_cell_inputs, avoid constructing an std::pair (which requires copying the port IdString)

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Robert O'Callahan 2025-09-01 03:36:03 +00:00 • committed by Emil J. Tywoniak
parent 41b6c0cb9f
commit 54a258f854
2 changed files with 7 additions and 1 deletions
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6
kernel/hashlib.h
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@ -188,6 +188,12 @@ template<typename P, typename Q> struct hash_ops<std::pair<P, Q>> {
return h;
}
HASH_TOP_LOOP_FST (const std::pair<P, Q> &a) HASH_TOP_LOOP_SND
[[nodiscard]] static inline Hasher hash(const P &p, const Q &q) {
Hasher h;
h = hash_ops<P>::hash_into(p, h);
h = hash_ops<Q>::hash_into(q, h);
return h;
}
};
template<typename... T> struct hash_ops<std::tuple<T...>> {

2
passes/opt/opt_merge.cc
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@ -107,7 +107,7 @@ struct OptMergeWorker
for (const auto& [port, sig] : cell->connections()) {
if (cell->output(port))
continue;
comm.eat(hash_ops<std::pair<IdString, SigSpec>>::hash({port, assign_map(sig)}));
comm.eat(hash_ops<std::pair<IdString, SigSpec>>::hash(port, assign_map(sig)));
}
h = comm.hash_into(h);
if (RTLIL::builtin_ff_cell_types().count(cell->type))