{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
                // but unsigned is slightly easier to codegen, so might as well.
                // Because diff_bytes ULE isize::MAX, this would be fine as signed,
                CValue::by_val(fx.bcx.ins().udiv_imm(diff_bytes, pointee_size as i64), usize_layout)