{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"//"}]}
        //     (especially with current `rustc_backend_ssa` API).
        //  1. Turning `PlaceRef` into `RValue` is error-prone and has nasty edge cases
        //  2. Not every output operand has an `out_place`, and it's required by `add_output_operand`.