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support for legacy datatype test

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-09-05 10:28:11 -07:00
parent aac7773a52
commit 06087c17be
12 changed files with 100 additions and 98 deletions
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13
src/ast/static_features.cpp
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@ -145,18 +145,19 @@ bool static_features::is_diff_atom(expr const * e) const {
return true;
if (!is_numeral(rhs))
return false;
// lhs can be 'x' or '(+ x (* -1 y))'
// lhs can be 'x' or '(+ x (* -1 y))' or '(+ (* -1 x) y)'
if (!is_arith_expr(lhs))
return true;
expr* arg1, *arg2;
if (!m_autil.is_add(lhs, arg1, arg2))
return false;
// x
if (is_arith_expr(arg1))
return false;
// arg2: (* -1 y)
expr* m1, *m2;
return m_autil.is_mul(arg2, m1, m2) && is_minus_one(m1) && !is_arith_expr(m2);
if (!is_arith_expr(arg1) && m_autil.is_mul(arg2, m1, m2) && is_minus_one(m1) && !is_arith_expr(m2))
return true;
if (!is_arith_expr(arg2) && m_autil.is_mul(arg1, m1, m2) && is_minus_one(m1) && !is_arith_expr(m2))
return true;
return false;
}
bool static_features::is_gate(expr const * e) const {