[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 #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
There are multiple issues reflected in this bug.  The last commit addressed the
SLP cost model thing (not fixing any testcase on its own).