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expand select/store when I/J are values #6053

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2022-05-25 20:23:43 -04:00
parent 4d8e4b5bd3
commit f77037e9a5
3 changed files with 38 additions and 2 deletions
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18
src/ast/rewriter/array_rewriter.cpp
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@ -179,8 +179,21 @@ br_status array_rewriter::mk_select_core(unsigned num_args, expr * const * args,
result = m().mk_app(get_fid(), OP_SELECT, num_args, new_args.data());
return BR_REWRITE1;
}
default:
if (m_blast_select_store || (m_expand_select_store && to_app(args[0])->get_arg(0)->get_ref_count() == 1)) {
default: {
auto are_values = [&]() {
for (unsigned i = 1; i < num_args; ++i) {
if (!m().is_value(args[i]))
return false;
if (!m().is_value(to_app(args[0])->get_arg(i)))
return false;
}
return true;
};
bool should_expand =
m_blast_select_store ||
are_values() ||
(m_expand_select_store && to_app(args[0])->get_arg(0)->get_ref_count() == 1);
if (should_expand) {
// select(store(a, I, v), J) --> ite(I=J, v, select(a, J))
ptr_buffer<expr> new_args;
new_args.push_back(to_app(args[0])->get_arg(0));
@ -203,6 +216,7 @@ br_status array_rewriter::mk_select_core(unsigned num_args, expr * const * args,
}
return BR_FAILED;
}
}
}
if (m_util.is_const(args[0])) {