https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77346
--- Comment #14 from Jeffrey A. Law <law at redhat dot com> --- Removing in gcc-8 sounds reasonable to me. Given that my analysis of undesirable sharing of range info for the other bug I was looking at was enough for Richi to find and fix the problem, I guess I'll poke further at this and see if I can come up with anything useful.