pytorch

e31ad1c2 - [reland] Move decompositions and helpers for jvp from functorch into core (#84581)

[reland] Move decompositions and helpers for jvp from functorch into core (#84581) Reland of https://github.com/pytorch/pytorch/pull/84358 Pull Request resolved: https://github.com/pytorch/pytorch/pull/84581 Approved by: https://github.com/samdow