Implement various AliasAnalysis operations directly on top of MemoryLocations. (#21203)
Summary:
This reduces DenseNet load time by about 25% (down to 5.3s on my laptop) and gets AliasAnalysis out of the profile top hits entirely.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21203
Differential Revision: D15578155
fbshipit-source-id: ddbb1ad25c9540b5214702830084aa51cc6fd3cb
