pytorch

e1f63475 - Setup fake tensor and symbolic shapes once at beginning of AOTAutograd (#85233)

Setup fake tensor and symbolic shapes once at beginning of AOTAutograd (#85233) Signed-off-by: Edward Z. Yang <ezyang@fb.com> Differential Revision: [D39662822](https://our.internmc.facebook.com/intern/diff/D39662822) Pull Request resolved: https://github.com/pytorch/pytorch/pull/85233 Approved by: https://github.com/wconstab