wasmer [1] has a LLVM backend, WAVM [2] uses LLVM as the bakend, I could be wrong but last time I checked, cranelift is only meant to be the next generation WASM engine used in Firefox, it is not yet in production.

And actually the argument is: all of v8, Firefox/Cranelift and LLVM used in wasmer requires non-trivial work to make WASM fast, which shouldn't be needed given a different model.

[1] https://github.com/wasmerio/wasmer/tree/master/lib/llvm-back... [2] https://github.com/WAVM/WAVM