[Bug tree-optimization/122841] Should get rid of max_nunits in SLP vectorization

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122841

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 62916
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62916&action=edit
failing attempt

This is how it should ideally work.  But

+FAIL: gcc.dg/torture/pr111128.c   -O2  (internal compiler error: in exact_div,
at poly-int.h:2179)

and the same ICE in a few others show the vectorizable_conversion issue.