[Bug tree-optimization/83202] Try joining operations on consecutive array elements during tree vectorization

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83202

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
For the other case the issue is I think that the SLP instance group size is not
the number of scalar stmts but somehow set to the group-size.  Changing that
has quite some ripple-down effects though.

-> GCC 9.