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Dedup op constraints

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This commit is contained in:
Jakob Rath 2022-11-07 15:02:48 +01:00
parent 89acd96a89
commit 2953b1c093
5 changed files with 61 additions and 40 deletions
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27
src/math/polysat/op_constraint.h
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@ -12,7 +12,7 @@ Module Name:
or: r == p | q
not: r == ~p
xor: r == p ^ q
Author:
Jakob Rath, Nikolaj Bjorner (nbjorner) 2021-12-09
@ -20,6 +20,7 @@ Author:
--*/
#pragma once
#include "math/polysat/constraint.h"
#include <optional>
namespace polysat {
@ -48,7 +49,7 @@ namespace polysat {
void narrow_and(solver& s);
static lbool eval_and(pdd const& p, pdd const& q, pdd const& r);
public:
public:
~op_constraint() override {}
pdd const& p() const { return m_p; }
pdd const& q() const { return m_q; }
@ -57,7 +58,7 @@ namespace polysat {
std::ostream& display(std::ostream& out) const override;
bool is_always_false(bool is_positive) const override;
bool is_currently_false(solver& s, bool is_positive) const override;
bool is_currently_false(solver& s, assignment_t const& sub, bool is_positive) const override { return false; }
bool is_currently_false(solver& s, assignment_t const& sub, bool is_positive) const override;
void narrow(solver& s, bool is_positive, bool first) override;
inequality as_inequality(bool is_positive) const override { throw default_exception("is not an inequality"); }
unsigned hash() const override;
@ -67,4 +68,24 @@ namespace polysat {
void add_to_univariate_solver(solver& s, univariate_solver& us, unsigned dep, bool is_positive) const override;
};
struct op_constraint_args {
op_constraint::code op;
// NOTE: this is only optional because table2map requires a default constructor
std::optional<std::pair<pdd, pdd>> args;
op_constraint_args() = default;
op_constraint_args(op_constraint::code op, pdd lhs, pdd rhs)
: op(op), args({std::move(lhs), std::move(rhs)}) {}
bool operator==(op_constraint_args const& other) const {
return op == other.op && args == other.args;
}
unsigned hash() const {
unsigned const lhs_hash = args ? args->first.hash() : 0;
unsigned const rhs_hash = args ? args->second.hash() : 0;
return mk_mix(static_cast<unsigned>(op), lhs_hash, rhs_hash);
}
};
}