[clang] Redesign handling of anyAppleOS availability attribute (PR #190817)

[Akira Hatanaka via cfe-commits]

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@@ -2520,14 +2535,41 @@ AvailabilityAttr *Sema::mergeAvailabilityAttr(
     auto *Avail = ::new (Context) AvailabilityAttr(
         Context, CI, Platform, Introduced, Deprecated, Obsoleted, IsUnavailable,
         Message, IsStrict, Replacement, Priority, Environment,
-        OrigAnyAppleOSVersion);
+        /*InferredAttr=*/nullptr);
     Avail->setImplicit(Implicit);
     return Avail;
   }
   return nullptr;
 }
 
-/// Returns true if the given availability attribute should be inferred, and
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ahatanak wrote:

No, I accidentally removed it.

https://github.com/llvm/llvm-project/pull/190817