So you can use any backend LLVM does.. theres a little runtime friction in porting a small Swift runtime to the target (but you would only need to worry about that, if its not a popular LLVM backend).
But given Apple is a first class consumer of Swift, arm is definetely a strategic backend for Swift, given it needs to run on iOS.
(its a little alpha i guess, but you can even compile your Swift code to run on WASM nowadays)
> So you can use any backend LLVM does.. theres a little runtime friction in porting a small Swift runtime to the target
More than a little friction, I would think.
I actually 'trust' the support if the language declares that they are going to support it. For example, Rust has said they will support the wasm target as first class.