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use less memory #1078

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This commit is contained in:
Nikolaj Bjorner 2017-06-14 21:40:16 -07:00
parent c980cfd783
commit 8ac43c981a
1 changed files with 78 additions and 0 deletions
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78
src/tactic/bv/bv_bounds_tactic.cpp
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@ -234,6 +234,7 @@ class bv_bounds_simplifier : public ctx_simplify_tactic::simplifier {
return false;
}
#if 0
expr_set* get_expr_vars(expr* t) {
unsigned id = t->get_id();
m_expr_vars.reserve(id + 1);
@ -259,7 +260,9 @@ class bv_bounds_simplifier : public ctx_simplify_tactic::simplifier {
}
return set;
}
#endif
#if 0
expr_cnt* get_expr_bounds(expr* t) {
unsigned id = t->get_id();
m_bound_exprs.reserve(id + 1);
@ -288,6 +291,7 @@ class bv_bounds_simplifier : public ctx_simplify_tactic::simplifier {
}
return set;
}
#endifx
public:
bv_bounds_simplifier(ast_manager& m, params_ref const& p) : m(m), m_params(p), m_bv(m) {
@ -392,17 +396,86 @@ public:
return result != 0;
}
// check if t contains v
ptr_vector<expr> todo;
bool contains(expr* t, expr* v) {
ast_fast_mark1 mark;
todo.push_back(t);
while (!todo.empty()) {
t = todo.back();
todo.pop_back();
if (mark.is_marked(t)) {
continue;
}
if (t == v) {
todo.reset();
return true;
}
mark.mark(t);
if (!is_app(t)) {
continue;
}
app* a = to_app(t);
todo.append(a->get_num_args(), a->get_args());
}
return false;
}
bool contains_bound(expr* t) {
ast_fast_mark1 mark1;
ast_fast_mark2 mark2;
todo.push_back(t);
while (!todo.empty()) {
t = todo.back();
todo.pop_back();
if (mark1.is_marked(t)) {
continue;
}
mark1.mark(t);
if (!is_app(t)) {
continue;
}
interval b;
expr* e;
if (is_bound(t, e, b)) {
if (mark2.is_marked(e)) {
todo.reset();
return true;
}
mark2.mark(e);
if (m_bound.contains(e)) {
todo.reset();
return true;
}
}
app* a = to_app(t);
todo.append(a->get_num_args(), a->get_args());
}
return false;
}
virtual bool may_simplify(expr* t) {
if (m_bv.is_numeral(t))
return false;
while (m.is_not(t, t));
for (auto & v : m_bound) {
if (contains(t, v.m_key)) return true;
}
#if 0
expr_set* used_exprs = get_expr_vars(t);
for (map::iterator I = m_bound.begin(), E = m_bound.end(); I != E; ++I) {
if (contains(t, I->m_key)) return true;
if (I->m_value.is_singleton() && used_exprs->contains(I->m_key))
return true;
}
#endif
expr* t1;
interval b;
@ -411,11 +484,16 @@ public:
return b.is_full() || m_bound.contains(t1);
}
if (contains_bound(t)) {
return true;
}
#if 0
expr_cnt* bounds = get_expr_bounds(t);
for (expr_cnt::iterator I = bounds->begin(), E = bounds->end(); I != E; ++I) {
if (I->m_value > 1 || m_bound.contains(I->m_key))
return true;
}
#endif
return false;
}