{"ast_node_type":"import","tokens":[{"end":65,"kind":"keyword","start":0,"text":"//"}]}
        // TODO(antoyo): if simd_insert is constant, use BIT_REF.
        let lvalue = bx.context.new_vector_access(None, variable.to_rvalue(), index);
        bx.llbb().add_assignment(None, lvalue, value);