https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88597
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2019-01-02 Version|4.6.0 |9.0 Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- The interesting part is of couse that =26 is fast but =27 is slow... likely because after completely peeling the inner loop the outer loop is starting to be peeled and analysis on _that_ body is taking forever for some reason (well, quadratic analysis in SCEV which isn't guarded "properly" everywhere). Mine.