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lp: avoid per-call join allocation in explain_fixed_column (#9984)

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Lev Nachmanson 2026-06-28 08:12:52 -07:00 • committed by GitHub
parent f07acb459f
commit 56bb49f8dc
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2 changed files with 24 additions and 2 deletions
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6
src/math/lp/lar_solver.cpp
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@ -1125,8 +1125,10 @@ namespace lp {
void lar_solver::explain_fixed_column(unsigned j, explanation& ex) {
SASSERT(column_is_fixed(j));
auto* deps = get_bound_constraint_witnesses_for_column(j);
for (auto ci : flatten(deps))
const column& ul = m_imp->m_columns[j];
m_imp->m_tmp_dependencies.reset();
m_imp->m_dependencies.linearize(ul.lower_bound_witness(), ul.upper_bound_witness(), m_imp->m_tmp_dependencies);
for (auto ci : m_imp->m_tmp_dependencies)
ex.push_back(ci);
}