{"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"|"}]}
            | (types::F64, types::F32 | types::F16)
            (types::F128, types::F64 | types::F32 | types::F16)
            | (types::F32, types::F16) => fx.bcx.ins().fdemote(to_ty, from),