https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81038
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |8.0 --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Eventually the loop is no longer unrolled (was it?) and is now loop vectorized? (and that bit is "fragile" because of -fvect-cost-model=dynamic?) Just guessing.