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use ref-vector for shared occurrences to avoid hash-table overhead

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-01-11 13:43:39 -08:00
parent f8f3549c1c
commit 9bd4050e0c
3 changed files with 17 additions and 34 deletions
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20
src/ast/shared_occs.cpp
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@ -21,13 +21,11 @@ Revision History:
#include "util/ref_util.h"
inline void shared_occs::insert(expr * t) {
obj_hashtable<expr>::entry * dummy;
if (m_shared.insert_if_not_there_core(t, dummy))
m.inc_ref(t);
m_shared.reserve(t->get_id() + 1);
m_shared[t->get_id()] = t;
}
void shared_occs::reset() {
dec_ref_collection_values(m, m_shared);
m_shared.reset();
}
@ -132,9 +130,15 @@ void shared_occs::operator()(expr * t) {
}
void shared_occs::display(std::ostream & out, ast_manager & m) const {
iterator it = begin_shared();
iterator end = end_shared();
for (; it != end; ++it) {
out << mk_ismt2_pp(*it, m) << "\n";
for (expr* s : m_shared) {
if (s) {
out << mk_ismt2_pp(s, m) << "\n";
}
}
}
unsigned shared_occs::num_shared() const{
unsigned count = 0;
for (expr* s : m_shared) if (s) count++;
return count;
}