{"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"let"}]}
        let (_, element_ty0) = args[0].layout.ty.simd_size_and_type(bx.tcx());
        // to the element type of the first argument
        let (_, element_ty1) = args[1].layout.ty.simd_size_and_type(bx.tcx());