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remove iff

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-05-16 18:35:38 -07:00 • committed by Arie Gurfinkel
parent ecf15ab07d
commit ff0f257102
47 changed files with 199 additions and 264 deletions
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2
src/qe/qe.cpp
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@ -614,7 +614,7 @@ namespace qe {
else if (m.is_ite(a)) {
nnf_ite(a, p);
}
else if (m.is_iff(a) || (m.is_eq(a) && m.is_bool(a->get_arg(0)))) {
else if (m.is_iff(a)) {
nnf_iff(a, p);
}
else if (m.is_xor(a)) {

2
src/qe/qe_lite.cpp
View file

@ -345,7 +345,7 @@ namespace eq {
var* v;
// (= VAR t), (iff VAR t), (iff (not VAR) t), (iff t (not VAR)) cases
if (m.is_eq(e, lhs, rhs) || m.is_iff(e, lhs, rhs)) {
if (m.is_eq(e, lhs, rhs)) {
// (iff (not VAR) t) (iff t (not VAR)) cases
if (!is_variable(lhs) && !is_variable(rhs) && m.is_bool(lhs)) {
if (!is_neg_var(m, lhs, v)) {