{"ast_node_type":"other","tokens":[{"end":240,"kind":"keyword","start":0,"text":"|"}]}
| PowerPC      | `lr`                                    | The link register cannot be used as an input or output.                                                                                                                             |
| PowerPC      | `r2`, `r13`                             | These are system reserved registers.                                                                                                                                                |
| PowerPC      | `ctr`                                   | The counter register cannot be used as an input or output.                                                                                                                          |