https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81435
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> --- I think it means that Andrew is a maintainer of the overall tree-ssa infrastructure. AFAIK, he has not done any work on the strlen optimizations in the file. Jakub is the author of the pass so he knows the most about it. But he's also aware of most bugs that come in so I don't think he needs to be CC'd. Most of the bugs I raised for the strlen pass are enhancements. I noticed them while testing various warnings (-Wstringop-overflow, -Wrestrict, etc.) where they imply false negatives. The optimizations themselves aren't necessarily critical to performance but the better the strlen pass is at optimizing stuff the better the warnings are at finding bugs. I expect to be doing some work on the strlen pass for GCC 10 so I might pick up some of these bugs in the process.
