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add recursive function graphs to model, adapt rewriter to bypass branches whose evaluation is redundant

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-02-16 13:58:12 -08:00
parent c67cf1653c
commit b0dd3f3238
4 changed files with 63 additions and 0 deletions
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11
src/ast/rewriter/rewriter_def.h
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@ -184,9 +184,20 @@ void rewriter_tpl<Config>::process_app(app * t, frame & fr) {
unsigned num_args = t->get_num_args();
while (fr.m_i < num_args) {
expr * arg = t->get_arg(fr.m_i);
if (fr.m_i >= 1 && m().is_ite(t) && !ProofGen) {
expr * cond = result_stack()[fr.m_spos].get();
if (m().is_true(cond)) {
arg = t->get_arg(1);
}
else if (m().is_false(cond)) {
arg = t->get_arg(2);
}
}
fr.m_i++;
if (!visit<ProofGen>(arg, fr.m_max_depth))
return;
}
func_decl * f = t->get_decl();