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fix #5102

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This commit is contained in:
Nikolaj Bjorner 2021-03-15 01:01:33 -07:00
parent 1cb0dbae51
commit 18143d8932
6 changed files with 41 additions and 32 deletions
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33
src/ast/rewriter/bv_rewriter.cpp
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@ -2293,16 +2293,15 @@ br_status bv_rewriter::mk_bit2bool(expr * lhs, expr * rhs, expr_ref & result) {
return BR_DONE;
}
if (m().is_ite(lhs)) {
result = m().mk_ite(to_app(lhs)->get_arg(0),
m().mk_eq(to_app(lhs)->get_arg(1), rhs),
m().mk_eq(to_app(lhs)->get_arg(2), rhs));
expr* a = nullptr, *b = nullptr, *c = nullptr;
if (m().is_ite(lhs, a, b, c)) {
result = m().mk_ite(a, m().mk_eq(b, rhs), m().mk_eq(c, rhs));
return BR_REWRITE2;
}
if (m_util.is_bv_not(lhs)) {
if (m_util.is_bv_not(lhs, a)) {
SASSERT(v.is_one() || v.is_zero());
result = m().mk_eq(to_app(lhs)->get_arg(0), mk_numeral(numeral(1) - v, 1));
result = m().mk_eq(a, mk_numeral(numeral(1) - v, 1));
return BR_REWRITE1;
}
@ -2313,11 +2312,9 @@ br_status bv_rewriter::mk_bit2bool(expr * lhs, expr * rhs, expr_ref & result) {
if (m_util.is_bv_or(lhs)) {
ptr_buffer<expr> new_args;
unsigned num = to_app(lhs)->get_num_args();
for (unsigned i = 0; i < num; i++) {
new_args.push_back(m().mk_eq(to_app(lhs)->get_arg(i), bit1));
}
result = m().mk_or(new_args.size(), new_args.c_ptr());
for (expr* arg : *to_app(lhs))
new_args.push_back(m().mk_eq(arg, bit1));
result = m().mk_or(new_args);
if (is_one) {
return BR_REWRITE2;
}
@ -2330,12 +2327,10 @@ br_status bv_rewriter::mk_bit2bool(expr * lhs, expr * rhs, expr_ref & result) {
if (m_util.is_bv_xor(lhs)) {
ptr_buffer<expr> new_args;
unsigned num = to_app(lhs)->get_num_args();
for (unsigned i = 0; i < num; i++) {
new_args.push_back(m().mk_eq(to_app(lhs)->get_arg(i), bit1));
}
for (expr* arg : *to_app(lhs))
new_args.push_back(m().mk_eq(arg, bit1));
// TODO: bool xor is not flat_assoc... must fix that.
result = m().mk_xor(new_args.size(), new_args.c_ptr());
result = m().mk_xor(new_args);
if (is_one) {
return BR_REWRITE2;
}
@ -2372,7 +2367,7 @@ br_status bv_rewriter::mk_blast_eq_value(expr * lhs, expr * rhs, expr_ref & resu
mk_numeral(bit0 ? 0 : 1, 1)));
div(v, two, v);
}
result = m().mk_and(new_args.size(), new_args.c_ptr());
result = m().mk_and(new_args);
return BR_REWRITE3;
}
@ -2438,7 +2433,7 @@ br_status bv_rewriter::mk_eq_concat(expr * lhs, expr * rhs, expr_ref & result) {
}
SASSERT(i1 == 0 && i2 == 0);
SASSERT(new_eqs.size() >= 1);
result = m().mk_and(new_eqs.size(), new_eqs.c_ptr());
result = m().mk_and(new_eqs);
return BR_REWRITE3;
}