serializing function calls (#23799)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23799
Before, we inlined as part of the initial IR generation process, which
has a few disadvantages:
1. It loses information about what nodes came from which function/method
calls. Other parties who want to implement transformations on the
function/module level don't have a reliable way of doing so.
2. It duplicates a ton of code if we are inlining the same
function/method a tons of times.
After this PR: inline is deferred to the optimization stage, so
optimizations that rely on inlining will still work. But things get
serialized with the function/method calls in.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23799
Differential Revision: D16652819
Test Plan: Imported from OSS
Reviewed By: jamesr66a
Pulled By: suo
fbshipit-source-id: a11af82aec796487586f81f5a9102fefb6c246db
