mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-24 01:25:31 +00:00
Code Activity

perf and div/mod axioms #4532

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-06-22 14:51:58 -07:00
parent 38d6771a5e
commit 8758baf24e
2 changed files with 38 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

6
src/ast/rewriter/arith_rewriter.cpp
View file

@ -975,6 +975,10 @@ br_status arith_rewriter::mk_idiv_core(expr * arg1, expr * arg2, expr_ref & resu
result = arg1;
return BR_DONE;
}
if (m_util.is_numeral(arg2, v2, is_int) && v2.is_minus_one()) {
result = m_util.mk_mul(m_util.mk_int(-1), arg1);
return BR_REWRITE1;
}
if (m_util.is_numeral(arg2, v2, is_int) && v2.is_zero()) {
return BR_FAILED;
}
@ -1119,7 +1123,7 @@ br_status arith_rewriter::mk_mod_core(expr * arg1, expr * arg2, expr_ref & resul
return BR_DONE;
}
if (m_util.is_numeral(arg2, v2, is_int) && is_int && v2.is_one()) {
if (m_util.is_numeral(arg2, v2, is_int) && is_int && (v2.is_one() || v2.is_minus_one())) {
result = m_util.mk_numeral(numeral(0), true);
return BR_DONE;
}