a273add815
This commit slims down the list of builtin intrinsics. It removes the duplicated intrinsics for imported and locally defined items, instead always using one intrinsic for both. This was previously inconsistently applied where some intrinsics got two copies (one for imported one for local) and other intrinsics got only one copy. This does add an extra branch in intrinsics since they need to determine whether something is local or not, but that's generally much lower cost than the intrinsics themselves. This also removes the `memory32_size` intrinsic, instead inlining the codegen directly into the clif IR. This matches what the `table.size` instruction does and removes the need for a few functions on a `wasmtime_runtime::Instance`.
This is the wasmtime-environ crate, which contains the implementations
of the ModuleEnvironment and FuncEnvironment traits from
cranelift-wasm. They effectively
implement an ABI for basic wasm compilation that defines how linear memories
are allocated, how indirect calls work, and other details. They can be used
for JITing, native object files, or other purposes.