https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81897
--- Comment #5 from Jeffrey A. Law <law at redhat dot com> --- It really depends on the growth necessary to expose the thread. I haven't tried to evaluate that -- clearly if the code growth is unacceptable then threading is the wrong answer. In general we should start each investigation of this kind of bug with an analysis of what the threader has missed and the pros/cons of addressing the missed thread. IMHO tree-ssa-uninit.c's job is really to deal with cases where we don't want to thread (usually because of code growth concerns, but there are others).
