SymIntEqByExpr

class torch.fx.experimental.symbolic_shapes.SymIntEqByExpr(val)

This is a wrapper around SymInt which has alternative semantics for equality and pickling. Specifically, instead of erroring or guarding, we instead will hash/compare equality based on the underlying sympy expression; e.g., s0 and s1 will always compare as False.

NB: This does NOT do fancy analysis that maybe_evaluate_static does; we can only reason through equalities that occur because to expressions canonicalize to the same expression via regular simplification.