{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"AArch64(AArch64InlineAsmRegClass::preg)"}]}
        AArch64(AArch64InlineAsmRegClass::preg) => unreachable!("clobber-only"),
        }
        Arm(ArmInlineAsmRegClass::reg) => None,