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guard expensive ite rewrites under configuration

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-07-09 14:17:39 -07:00
parent 8373bec6ad
commit de454db58c
2 changed files with 19 additions and 15 deletions
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30
src/ast/rewriter/bool_rewriter.cpp
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@ -613,12 +613,12 @@ br_status bool_rewriter::try_ite_value(app * ite, app * val, expr_ref & result)
expr* cond2 = nullptr, *t2 = nullptr, *e2 = nullptr;
if (m().is_ite(t, cond2, t2, e2) && m().is_value(t2) && m().is_value(e2)) {
try_ite_value(to_app(t), val, result);
VERIFY(BR_FAILED != try_ite_value(to_app(t), val, result));
result = m().mk_ite(cond, result, m().mk_eq(e, val));
return BR_REWRITE2;
}
if (m().is_ite(e, cond2, t2, e2) && m().is_value(t2) && m().is_value(e2)) {
try_ite_value(to_app(e), val, result);
VERIFY(BR_FAILED != try_ite_value(to_app(e), val, result));
result = m().mk_ite(cond, m().mk_eq(t, val), result);
return BR_REWRITE2;
}
@ -640,19 +640,21 @@ br_status bool_rewriter::mk_eq_core(expr * lhs, expr * rhs, expr_ref & result) {
br_status r = BR_FAILED;
if (m().is_ite(lhs) && m().is_value(rhs)) {
r = try_ite_value(to_app(lhs), to_app(rhs), result);
CTRACE("try_ite_value", r != BR_FAILED,
tout << mk_bounded_pp(lhs, m()) << "\n" << mk_bounded_pp(rhs, m()) << "\n--->\n" << mk_bounded_pp(result, m()) << "\n";);
if (m_ite_extra_rules) {
if (m().is_ite(lhs) && m().is_value(rhs)) {
r = try_ite_value(to_app(lhs), to_app(rhs), result);
CTRACE("try_ite_value", r != BR_FAILED,
tout << mk_bounded_pp(lhs, m()) << "\n" << mk_bounded_pp(rhs, m()) << "\n--->\n" << mk_bounded_pp(result, m()) << "\n";);
}
else if (m().is_ite(rhs) && m().is_value(lhs)) {
r = try_ite_value(to_app(rhs), to_app(lhs), result);
CTRACE("try_ite_value", r != BR_FAILED,
tout << mk_bounded_pp(lhs, m()) << "\n" << mk_bounded_pp(rhs, m()) << "\n--->\n" << mk_bounded_pp(result, m()) << "\n";);
}
if (r != BR_FAILED)
return r;
}
else if (m().is_ite(rhs) && m().is_value(lhs)) {
r = try_ite_value(to_app(rhs), to_app(lhs), result);
CTRACE("try_ite_value", r != BR_FAILED,
tout << mk_bounded_pp(lhs, m()) << "\n" << mk_bounded_pp(rhs, m()) << "\n--->\n" << mk_bounded_pp(result, m()) << "\n";);
}
if (r != BR_FAILED)
return r;
if (m().is_bool(lhs)) {
bool unfolded = false;