https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112361
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- You can use SDE (the simulator from Intel), but I suppose just inspecting the vectorized code should work fine as well. I suspect we fail to fail vectorization when we have a masked op but no native masked_fold_left as we cannot open-code that variant.
