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add comments to elim_unconstrained and remove unused function

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This commit is contained in:
Nikolaj Bjorner 2022-11-12 18:01:38 -08:00
parent efbe0a6554
commit 9d09064ad0
2 changed files with 8 additions and 12 deletions
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16
src/ast/simplifiers/elim_unconstrained.cpp
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@ -103,12 +103,6 @@ void elim_unconstrained::eliminate() {
}
}
void elim_unconstrained::add_term(expr* t) {
expr_ref_vector terms(m);
terms.push_back(t);
init_terms(terms);
}
expr* elim_unconstrained::get_parent(unsigned n) const {
for (expr* p : get_node(n).m_parents)
if (get_node(p).m_refcount > 0 && get_node(p).m_term == get_node(p).m_orig)
@ -128,20 +122,23 @@ void elim_unconstrained::init_nodes() {
terms.push_back(m_fmls[i].fml());
m_trail.append(terms);
m_heap.reset();
m_frozen.reset();
// initialize nodes for terms in the original goal
init_terms(terms);
// top-level terms have reference count > 0
for (expr* e : terms)
inc_ref(e);
// freeze subterms before the head.
// freeze subterms before the already processed head
terms.reset();
for (unsigned i = 0; i < m_qhead; ++i)
terms.push_back(m_fmls[i].fml());
for (expr* e : subterms::all(terms))
m_frozen.mark(e, true);
// freeze subterms that occur with recursive function definitions
recfun::util rec(m);
if (rec.has_rec_defs()) {
for (func_decl* f : rec.get_rec_funs()) {
@ -152,6 +149,9 @@ void elim_unconstrained::init_nodes() {
}
}
/**
* Create nodes for all terms in the goal
*/
void elim_unconstrained::init_terms(expr_ref_vector const& terms) {
unsigned max_id = 0;
for (expr* e : subterms::all(terms))