693c6ea771
This commit extracts the two implementations of `Compiler` into two separate crates, `wasmtime-cranelfit` and `wasmtime-lightbeam`. The `wasmtime-jit` crate then depends on these two and instantiates them appropriately. The goal here is to start reducing the weight of the `wasmtime-environ` crate, which currently serves as a common set of types between all `wasmtime-*` crates. Long-term I'd like to remove the dependency on Cranelift from `wasmtime-environ`, but that's going to take a lot more work. In the meantime I figure it's a good way to get started by separating out the lightbeam/cranelift function compilers from the `wasmtime-environ` crate. We can continue to iterate on moving things out in the future, too.
This is the wasmtime-wast crate, which contains an implementation of WebAssembly's
"wast" test scripting language, which is used in the
WebAssembly spec testsuite, using wasmtime for execution.