{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"RiscV(RiscVInlineAsmRegClass::vreg)"}]}
            RiscV(RiscVInlineAsmRegClass::vreg) => unreachable!("clobber-only"),
            RiscV(RiscVInlineAsmRegClass::freg) => "f",
            X86(X86InlineAsmRegClass::reg) => "r",