llvm/llvm/test/Demangle/ms-cxx20.test

; RUN: llvm-undname < %s | FileCheck %s

; CHECK-NOT: Invalid mangled name

??__LA@@QEAA?AUno_suspend@@XZ
; CHECK: struct no_suspend __cdecl A::operator co_await(void)

??__MS@@QEAA?AVstrong_ordering@std@@AEBU0@@Z'
; CHECK: class std::strong_ordering __cdecl S::operator<=>(struct S const &)

?f@@YAX_Q@Z
; CHECK: void __cdecl f(char8_t)