message: Only enable SIMD when using the LLVM backend.
diff: @@ -317,7 +317,10 @@ fn execute_wasm(options: &Run) -> Result<(), String> {
  if !utils::is_wasm_binary(&wasm_binary) {
  let mut features = wabt::Features::new();
  + if options.backend == Backend::LLVM {
  + // SIMD is only supported in the LLVM backend for now
  features.enable_simd();
  + }
  wasm_binary = wabt::wat2wasm_with_features(wasm_binary, features)
  .map_err(|e| format!("Can't convert from wast to wasm: {:?}", e))?;
  }
  