<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi,<div class=""><br class=""></div><div class="">Recently I committed a change (r330175) that passed all my testing, but failed on several bots. Namely, these are the failed ones:</div><div class=""><a href="http://lab.llvm.org:8011/builders/clang-with-thin-lto-ubuntu/builds/9803" class="">http://lab.llvm.org:8011/builders/clang-with-thin-lto-ubuntu/builds/9803</a></div><div class=""><a href="http://lab.llvm.org:8011/builders/clang-with-lto-ubuntu/builds/8173" class="">http://lab.llvm.org:8011/builders/clang-with-lto-ubuntu/builds/8173</a></div><div class=""><a href="http://lab.llvm.org:8011/builders/lld-x86_64-freebsd/builds/18082" class="">http://lab.llvm.org:8011/builders/lld-x86_64-freebsd/builds/18082</a></div><div class=""><br class=""></div><div class="">I reverted the change (r330180), but now I’m stuck with how to proceed with it, as I can’t reproduce any of these.</div><div class=""><br class=""></div><div class="">So far I’ve tried building clang with asan and using this sanitized clang to build clang and lld one more time and run make check - none of these failed on my machine. What else could I try to catch the issue?</div><div class=""><br class=""></div><div class="">In case you are interested in details and/or want to try to reproduce it, you’ll need to revert r330180 (and thus reapply r330175). The change is about using a new faster SSAUpdater in Jump Threading, more details are available in the phabricator: <a href="https://reviews.llvm.org/D44282" class="">https://reviews.llvm.org/D44282</a>.</div><div class=""><br class=""></div><div class="">Thanks,</div><div class="">Michael</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div></body></html>