https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116901
Richard Sandiford <rsandifo at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |rsandifo at gcc dot gnu.org Assignee|unassigned at gcc dot gnu.org |rsandifo at gcc dot gnu.org Status|NEW |ASSIGNED --- Comment #5 from Richard Sandiford <rsandifo at gcc dot gnu.org> --- Mine. The problem seems to stem from r15-1329-gd66b820f392aa9a7, which left ncopies as 1 while costing the SLP single-def-use case.