https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83359
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #5) > Created attachment 42830 [details] > gcc8-pr83359.patch > > In the mean time I wrote this patch. > > That said, LOOP_DIST_ALIAS seems quite fragile to me, unlike ifcvt added > LOOP_VECTORIZED calls which go away in the very next pass, there are many > passes in between ldist and vectorizer and I'd be worried that the calls > could be cloned with other loop copying, moved and all other kinds of > things, especially in graphite. IMHO given it's fragility we should see to tame it down for the release with either folding the remaining calls during fold-all-builtins or replacing expand_LOOP_DIST_ALIAS with code that does in fact expand the function (to its boolean argument). expand_LOOP_DIST_ALIAS should then emit a note in the .expand dump so we can track the cases we leak it.
