52440f0fc8
* Remove ImmutableRegisterState
It was introduced for an SCCP optimization pass, but a simplified
version of this will likely use the egraph infrastructure instead.
* Replace {get,set}_value in State with current_frame{,_mut}
The outer Interpreter needs this anyway and only offering one way to
get locals simplifies things.
* Update comment
This crate provides an interpreter for Cranelift IR. It is still a work in progress, as many instructions are unimplemented and various implementation gaps exist. Use at your own risk.