[clang] [Clang] fix overload resolution for object parameters with top-level cv-qualifiers in member functions (PR #110435)

[Erich Keane via cfe-commits]

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@@ -1511,8 +1511,11 @@ static bool IsOverloadOrOverrideImpl(Sema &SemaRef, FunctionDecl *New,
       auto NewObjectType = New->getFunctionObjectParameterReferenceType();
       auto OldObjectType = Old->getFunctionObjectParameterReferenceType();
 
-      if (NewObjectType.isConstQualified() != OldObjectType.isConstQualified())
-        return false;
+      if (Old->isExplicitObjectMemberFunction() &&
+          OldObjectType.getQualifiers() != NewObjectType.getQualifiers())
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erichkeane wrote:

The always-early-return doesn't make sense here to me, as Corentin mentioned, because `__restrict` can't be overloaded on IIRC.

https://github.com/llvm/llvm-project/pull/110435