[Bug tree-optimization/79291] r244897 introduces IV related performance issues for daxpy on MIPS by enabling peeling for alignment

[doug.gilmore at imgtec dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79291

--- Comment #4 from Doug Gilmore <doug.gilmore at imgtec dot com> ---
> It also looks like mips lacks implementation of any of the
> vectorizer cost hooks and thus defaults to
> default_builtin_vectorization_cost which means that unaligned
> loads/stores have double cost.
I have investigated that in the past and that costing is needed
in some cases.  I'll start looking into that again.