pytorch

a60ff698 - [functorch] Generate n^2 not n^3 inputs for batch and instance norm; small batch norm fix (pytorch/functorch#951)

[functorch] Generate n^2 not n^3 inputs for batch and instance norm; small batch norm fix (pytorch/functorch#951) * refactor batch norm exhaustive inputs * fix typo in batch rule * fix expand issue, add without cudnn xfail