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fix pb rewriter

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-03-12 11:22:05 -07:00
parent f04e805fa4
commit e7d43ed516
16 changed files with 215 additions and 129 deletions
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16
src/ast/rewriter/pb_rewriter_def.h
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@ -45,25 +45,25 @@ void pb_rewriter_util<PBU>::unique(typename PBU::args_t& args, typename PBU::num
}
}
// remove constants
for (unsigned i = 0; i < args.size(); ++i) {
unsigned j = 0, sz = args.size();
for (unsigned i = 0; i < sz; ++i) {
if (m_util.is_true(args[i].first)) {
k -= args[i].second;
std::swap(args[i], args[args.size()-1]);
args.pop_back();
--i;
}
else if (m_util.is_false(args[i].first)) {
std::swap(args[i], args[args.size()-1]);
args.pop_back();
--i;
// no-op
}
else {
args[j++] = args[i];
}
}
args.shrink(j);
// sort and coalesce arguments:
typename PBU::compare cmp;
std::sort(args.begin(), args.end(), cmp);
// coallesce
unsigned i, j;
unsigned i;
for (i = 0, j = 1; j < args.size(); ++j) {
if (args[i].first == args[j].first) {
args[i].second += args[j].second;