{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"RiscV(RiscVInlineAsmRegClass::vreg)"}]}
        RiscV(RiscVInlineAsmRegClass::vreg) => unreachable!("clobber-only"),
        RiscV(RiscVInlineAsmRegClass::reg) | RiscV(RiscVInlineAsmRegClass::freg) => None,
        X86(X86InlineAsmRegClass::reg) | X86(X86InlineAsmRegClass::reg_abcd) => match modifier {