f3b408d5e2
We don't need to spend time going through the GVN map to dedup a newly-constructed `iconst 0` when we already matched that value on the left-hand side of these rules. Also, mark these rules as subsuming any others since we can't do better than reducing an expression to a constant.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.