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> At the end of the day, I don't need to make weird and often gross C bindings in my Rust or Go code. Is that not a huge win?

That stuff only works if you limit yourself to exclusively run in a wasm runtime. If you want to compile to any other platform you still need C glue code.

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If you're distributing an executable (not a library), you can just AOT compile the generated wasm to machine code.

For example, the WasmExplorer already lets you compile C++ -> wasm -> x86 assembly: https://mbebenita.github.io/WasmExplorer/?state=%7B%22option...

I doubt you get the same performance as direct compilation. LLVM ir carries lots of annotations useful to optimizing passes, e.g. aliasing information.

The twist is, you can produce wasm from LLVM, including running the full mid-level optimizer first, which is the part of LLVM where those annotations and aliasing information are most valuable.

If this turns out to be useful then what's stopping us adding similar annotations in a custom section for Webassembly?

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