{"ast_node_type":"variable","tokens":[{"end":71,"kind":"keyword","start":0,"text":"let"}]}
        let ptr_bits = bx.tcx().data_layout.pointer_size().bits() as _;
        let is_add = name == sym::simd_saturating_add;
        let (signed, elem_width, elem_ty) = match *in_elem.kind() {