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Move merge_tf handling to euf_internalize

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literals true/false are not necessarily created when the merge flag is set.
Also disable merge_tf for if-then-else expressions
Perhaps even not insert children of if expressions into congruence table?
This commit is contained in:
Nikolaj Bjorner 2022-11-24 15:09:13 +07:00
parent eceeb295fc
commit 15dc7b78a0
3 changed files with 29 additions and 12 deletions
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12
src/ast/euf/euf_egraph.cpp
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@ -36,10 +36,8 @@ namespace euf {
}
m_expr2enode.setx(f->get_id(), n, nullptr);
push_node(n);
for (unsigned i = 0; i < num_args; ++i) {
set_cgc_enabled(args[i], true);
set_merge_tf_enabled(args[i], true);
}
for (unsigned i = 0; i < num_args; ++i)
set_cgc_enabled(args[i], true);
return n;
}
@ -271,12 +269,6 @@ namespace euf {
if (enable_merge_tf != n->merge_tf()) {
n->set_merge_tf(enable_merge_tf);
m_updates.push_back(update_record(n, update_record::toggle_merge_tf()));
if (enable_merge_tf && n->value() != l_undef && !m.is_value(n->get_root()->get_expr())) {
expr* b = n->value() == l_true ? m.mk_true() : m.mk_false();
enode* tf = find(b);
if (tf)
add_literal(n, tf);
}
}
}