https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63175
--- Comment #30 from Martin Sebor <msebor at gcc dot gnu.org> --- In light of this discussion it seems as though it might be best to keep the changes to the tests for this functionality to a minimum for now. Unless someone has a different suggestion I'll post an updated patch that just fixes the wrong string in costmodel-bb-slp-9a.c and adds a test for the one regression that Richard already fixed (referenced in comment #10).