The work on e-graphs I refer to is <https://egraphs-good.github.io/>—amortised rebuilds.

My example has nothing whatsoever to do with abi, and everything to do with ir. f and g are exactly semantically equivalent, and this equivalence is trivial to show; that the compilers generate different code for each demonstrates redundancies in their ir.

> it is a side effect to assign to a variable

But that variable is not aliased here.