[NNC] IRSimplifier rules for Compare and Mod (#46412)
Summary:
Adds new rules to the NNC IRSimplifier to take care of the following cases:
* Comparisons which are symbolic but have a constant difference. E.g. this is most useful in cases like `if (x > x + 4) ...` which we can now eliminate.
* Simplification of `Mod` nodes, including simple rules such as `0 % x` and `x % 1`, but also factorization of both sides to find common symbolic multiples. E.g. `(x * y) % x` can be cancelled out to `0`.
See tests for many more examples!
Pull Request resolved: https://github.com/pytorch/pytorch/pull/46412
Reviewed By: navahgar
Differential Revision: D24396151
Pulled By: nickgg
fbshipit-source-id: abb954dc930867d62010dcbcd8a4701430733715
