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cheap_eqs tree

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-06-15 16:08:53 -07:00
parent 274323b818
commit f7f9c15676
3 changed files with 28 additions and 20 deletions
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20
src/math/lp/lar_solver.h
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@ -342,8 +342,28 @@ public:
if (settings().get_cancel_flag())
return;
}
// these two loops should be run sequentially
// since the first loop might change column bounds
// and add fixed columns this way
bp.clear_for_eq();
if (settings().cheap_eqs()) {
for (unsigned i : m_rows_with_changed_bounds) {
calculate_cheap_eqs_for_row(i, bp);
if (settings().get_cancel_flag())
return;
}
}
m_rows_with_changed_bounds.clear();
}
template <typename T>
void calculate_cheap_eqs_for_row(unsigned i, lp_bound_propagator<T> & bp) {
if (settings().cheap_eqs() == 1) {
bp.cheap_eq_tree(i);
} else {
bp.cheap_eq_table(i);
}
}
bool is_fixed(column_index const& j) const { return column_is_fixed(j); }
inline column_index to_column_index(unsigned v) const { return column_index(external_to_column_index(v)); }
bool external_is_used(unsigned) const;