If they integrated Clang, then they could use Clang to compile code to WebAssembly, which can be executed by iOS's Javascript engine and pre-processed by wasm-m

If they integrated Clang, then they could use Clang to compile code to WebAssembly, which can be executed by iOS's Javascript engine and pre-processed by wasm-metering[0] to set execution op limits so infinite loops can be recovered from. [0] https://github.com/ewasm/wasm-metering https://github.com/ewasm/wasm-metering