https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98848
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org Status|NEW |ASSIGNED --- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 50102 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50102&action=edit gcc11-pr98848.patch This works too. I don't see how we could use vect_reassociating_reduction_p, that for one seems to be used in the positive checks (only recognize if reduction) and more importantly, makes heavy assumptions on what the assignment must be (while for over-widen it could be e.g. a COND_EXPR).