<p><span class="h-card" translate="no"><a href="https://mastodon.social/@whitequark" class="u-url mention">@<span>whitequark</span></a></span> <span class="h-card" translate="no"><a href="https://types.pl/@lenary" class="u-url mention">@<span>lenary</span></a></span> <span class="h-card" translate="no"><a href="https://hachyderm.io/@unlambda" class="u-url mention">@<span>unlambda</span></a></span> anyway, undef in LLVM was tricky enough that it took Nuno multiple iterations to get it right. it makes the quantifier alternation fundamentally harder and then Z3's quantifier elimination is not super great. it's a problem for us.</p>