6b137c2a3d
After compilation there's actually no need to hold onto the native signature for a wasm function type, so this commit moves out the `ir::Signature` value from a `Module` into a separate field that's deallocated when compilation is finished. This simplifies the `SignatureRegistry` because it only needs to track wasm functino types and it also means less work is done for `Func::wrap`.
This is the wasmtime-jit crate, which contains JIT-based execution
for wasm, using the wasm ABI defined by wasmtime-environ and the
runtime support provided by wasmtime-runtime.
Most users will want to use the main wasmtime crate instead of using this
crate directly.