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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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4
src/tactic/aig/aig.cpp
View file

@ -490,7 +490,6 @@ struct aig_manager::imp {
case OP_NOT:
case OP_OR:
case OP_AND:
case OP_IFF:
case OP_XOR:
case OP_IMPLIES:
case OP_ITE:
@ -582,9 +581,6 @@ struct aig_manager::imp {
SASSERT(m.m().is_bool(fr.m_t->get_arg(0)));
mk_iff(fr.m_spos);
break;
case OP_IFF:
mk_iff(fr.m_spos);
break;
case OP_XOR:
mk_xor(fr.m_spos);
break;

1
src/tactic/core/cofactor_elim_term_ite.cpp
View file

@ -87,7 +87,6 @@ struct cofactor_elim_term_ite::imp {
case OP_TRUE:
case OP_FALSE:
case OP_ITE:
case OP_IFF:
return;
case OP_EQ:
case OP_DISTINCT:

2
src/tactic/core/dom_simplify_tactic.cpp
View file

@ -486,7 +486,7 @@ bool expr_substitution_simplifier::is_gt(expr* lhs, expr* rhs) {
void expr_substitution_simplifier::update_substitution(expr* n, proof* pr) {
expr* lhs, *rhs, *n1;
if (is_ground(n) && (m.is_eq(n, lhs, rhs) || m.is_iff(n, lhs, rhs))) {
if (is_ground(n) && m.is_eq(n, lhs, rhs)) {
compute_depth(lhs);
compute_depth(rhs);
m_trail.push_back(lhs);

1
src/tactic/core/elim_uncnstr_tactic.cpp
View file

@ -331,7 +331,6 @@ class elim_uncnstr_tactic : public tactic {
return r;
}
return nullptr;
case OP_IFF:
case OP_EQ:
SASSERT(num == 2);
return process_eq(f, args[0], args[1]);

5
src/tactic/core/solve_eqs_tactic.cpp
View file

@ -344,10 +344,7 @@ class solve_eqs_tactic : public tactic {
}
return false;
}
if (m().is_iff(f))
return trivial_solve(to_app(f)->get_arg(0), to_app(f)->get_arg(1), var, def, pr);
#if 0
if (not_bool_eq(f, var, def, pr))
return true;

2
src/tactic/core/tseitin_cnf_tactic.cpp
View file

@ -176,7 +176,6 @@ class tseitin_cnf_tactic : public tactic {
sign = !sign;
goto start;
case OP_OR:
case OP_IFF:
l = nullptr;
m_cache.find(to_app(n), l);
SASSERT(l != 0);
@ -223,7 +222,6 @@ class tseitin_cnf_tactic : public tactic {
goto start;
}
case OP_OR:
case OP_IFF:
visited = false;
push_frame(to_app(n));
return;