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This serves two purposes: 1. It ensures that we call `get_or_create_table` to ensure that the embedder already had a chance to create the given table (although this is mostly redundant due to validation). 2. It allows the embedder to easily get the `ir::TableData` associated with this table, and more easily emit whatever inline JIT code to translate the table instruction (rather than falling back to VM calls).
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.