pytorch

ece8ef2f - Run canonical graph optimizations in optimize_for_mobile. (#38840)

Run canonical graph optimizations in optimize_for_mobile. (#38840) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/38840 JIT graph executor runs some canonical optimizations such as cse, dead code elimination etc before constructing code that interpreter executes. Since we do not have full JIT in lite interpreter any such graph optimizations must happen AOT. This diff applies such canonical optimizations on graph. Test Plan: CI's test_mobile_optimizer. Reviewed By: dreiss Differential Revision: D21675855 fbshipit-source-id: 5dd898088ef8250103ccbbb6aa2bbce156a8d61d