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merge

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-06-02 10:37:22 -07:00
commit 3ce82ea8ce
35 changed files with 2434 additions and 1483 deletions
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45
src/ast/rewriter/arith_rewriter.cpp
View file

@ -738,9 +738,54 @@ br_status arith_rewriter::mk_idiv_core(expr * arg1, expr * arg2, expr_ref & resu
result = m_util.mk_idiv0(arg1);
return BR_REWRITE1;
}
expr_ref quot(m());
if (divides(arg1, arg2, quot)) {
result = m_util.mk_mul(quot, m_util.mk_idiv(arg1, arg1));
return BR_REWRITE2;
}
return BR_FAILED;
}
bool arith_rewriter::divides(expr* d, expr* n, expr_ref& quot) {
if (d == n) {
quot = m_util.mk_numeral(rational(1), m_util.is_int(d));
return true;
}
if (m_util.is_mul(n)) {
expr_ref_vector muls(m());
muls.push_back(n);
expr* n1, *n2;
rational r1, r2;
for (unsigned i = 0; i < muls.size(); ++i) {
if (m_util.is_mul(muls[i].get(), n1, n2)) {
muls[i] = n1;
muls.push_back(n2);
--i;
}
}
if (m_util.is_numeral(d, r1) && !r1.is_zero()) {
for (unsigned i = 0; i < muls.size(); ++i) {
if (m_util.is_numeral(muls[i].get(), r2) && (r2 / r1).is_int()) {
muls[i] = m_util.mk_numeral(r2 / r1, m_util.is_int(d));
quot = m_util.mk_mul(muls.size(), muls.c_ptr());
return true;
}
}
}
else {
for (unsigned i = 0; i < muls.size(); ++i) {
if (d == muls[i].get()) {
muls[i] = muls.back();
muls.pop_back();
quot = m_util.mk_mul(muls.size(), muls.c_ptr());
return true;
}
}
}
}
return false;
}
br_status arith_rewriter::mk_mod_core(expr * arg1, expr * arg2, expr_ref & result) {
set_curr_sort(m().get_sort(arg1));
numeral v1, v2;

1
src/ast/rewriter/arith_rewriter.h
View file

@ -90,6 +90,7 @@ class arith_rewriter : public poly_rewriter<arith_rewriter_core> {
bool is_pi_integer_offset(expr * t, expr * & m);
expr * mk_sin_value(rational const & k);
app * mk_sqrt(rational const & k);
bool divides(expr* d, expr* n, expr_ref& quot);
public:
arith_rewriter(ast_manager & m, params_ref const & p = params_ref()):