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share: bail better on too many patterns

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This commit is contained in:
Emil J. Tywoniak 2025-03-10 17:55:04 +01:00
parent 912c93ca0b
commit ca9176cd0f
1 changed files with 17 additions and 6 deletions
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23
passes/opt/share.cc
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@ -856,18 +856,20 @@ struct ShareWorker
}
template<typename Iterator>
void insert_capped(pool<ssc_pair_t>& cache, Iterator begin_pattern, Iterator end_pattern)
bool insert_capped(pool<ssc_pair_t>& cache, Iterator begin_pattern, Iterator end_pattern)
{
if (cache.size() + std::distance(begin_pattern, end_pattern) > config.pattern_limit) {
cache.clear();
cache.insert(ssc_pair_t());
return false;
} else {
cache.insert(begin_pattern, end_pattern);
}
return true;
}
void insert_capped(pool<ssc_pair_t>& cache, ssc_pair_t pattern)
bool insert_capped(pool<ssc_pair_t>& cache, ssc_pair_t pattern)
{
insert_capped(cache, &pattern, &pattern + 1);
return insert_capped(cache, &pattern, &pattern + 1);
}
const pool<ssc_pair_t> &find_cell_activation_patterns(RTLIL::Cell *cell, const char *indent)
@ -926,20 +928,29 @@ struct ShareWorker
for (int i = 0; i < GetSize(sig_s); i++)
p.first.append(sig_s[i]), p.second.bits().push_back(RTLIL::State::S0);
if (sort_check_activation_pattern(p))
insert_capped(activation_patterns_cache[cell], p);
if (!insert_capped(activation_patterns_cache[cell], p)) {
recursion_state.erase(cell);
return activation_patterns_cache[cell];
}
}
for (int idx : used_in_b_parts)
for (auto p : c_patterns) {
p.first.append(sig_s[idx]), p.second.bits().push_back(RTLIL::State::S1);
if (sort_check_activation_pattern(p))
insert_capped(activation_patterns_cache[cell], p);
if (!insert_capped(activation_patterns_cache[cell], p)) {
recursion_state.erase(cell);
return activation_patterns_cache[cell];
}
}
}
for (auto c : driven_cells) {
const pool<ssc_pair_t> &c_patterns = find_cell_activation_patterns(c, indent);
insert_capped(activation_patterns_cache[cell], c_patterns.begin(), c_patterns.end());
if (!insert_capped(activation_patterns_cache[cell], c_patterns.begin(), c_patterns.end())) {
recursion_state.erase(cell);
return activation_patterns_cache[cell];
}
}
log_assert(recursion_state.count(cell) != 0);