https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115533
--- Comment #8 from Sam James <sjames at gcc dot gnu.org> --- (In reply to Richard Biener from comment #5) > I wonder if it's the badly tested interaction between IPA opts and IPA PTA, > I assume -O2 -ftree-vectorize instead of -O3 isn't enough to reproduce? > It isn't, surprisingly. It was also really sensitive to vectorisation -- for a while, novector on one loop was enough, but it stopped being after reduction. We'll see..
