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Merge pull request #3946 from rmlarsen/toposort

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Speed up TopoSort by 2.7-3.3x.
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Lofty 2023-10-17 13:00:18 +01:00 • committed by GitHub
commit d21c464ae4
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5 changed files with 102 additions and 52 deletions
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16
passes/opt/opt_expr.cc
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@ -424,13 +424,19 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
for (auto &bit : sig)
outbit_to_cell[bit].insert(cell);
}
cells.node(cell);
cells.node(cell);
}
for (auto &it_right : cell_to_inbit)
for (auto &it_sigbit : it_right.second)
for (auto &it_left : outbit_to_cell[it_sigbit])
cells.edge(it_left, it_right.first);
// Build the graph for the topological sort.
for (auto &it_right : cell_to_inbit) {
const int r_index = cells.node(it_right.first);
for (auto &it_sigbit : it_right.second) {
for (auto &it_left : outbit_to_cell[it_sigbit]) {
const int l_index = cells.node(it_left);
cells.edge(l_index, r_index);
}
}
}
cells.sort();

2
passes/opt/share.cc
View file

@ -1032,7 +1032,7 @@ struct ShareWorker
}
bool found_scc = !toposort.sort();
topo_cell_drivers = std::move(toposort.database);
topo_cell_drivers = toposort.get_database();
if (found_scc && toposort.analyze_loops)
for (auto &loop : toposort.loops) {