Function prepend_if

ir/pointer.cpp:39–41

}

static expr prepend_if(const expr &pre, expr &&e, bool prepend) {
  return prepend ? pre.concat(e) : std::move(e);
}

static string local_name(const State *s, const char *name) {
  return string(name) + (s->isSource() ? "_src" : "_tgt");