[clang] [CIR] Implement vTableClassName for Type::ObjCObject (PR #195232)

[Andy Kaylor via cfe-commits]

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@@ -1564,17 +1571,24 @@ mlir::Attribute CIRGenItaniumRTTIBuilder::buildTypeInfo(
     break;
   }
 
-  case Type::ObjCObject:
+  case Type::ObjCObject: {
+    // Drop protocol qualifiers.
+    const Type *T = cast<ObjCObjectType>(ty)->getBaseType().getTypePtr();
+    // The builtin types are abi::__class_type_infos and don't require
+    // extra fields.
+    if (isa<BuiltinType>(T))
+      break;
+  } [[fallthrough]];
+
   case Type::ObjCInterface:
-    cgm.errorNYI("buildTypeInfo: ObjCObject & ObjCInterface");
+    cgm.errorNYI("buildTypeInfo: ObjCInterface");
     break;
 
   case Type::ObjCObjectPointer:
-    cgm.errorNYI("buildTypeInfo: ObjCObjectPointer");
+    buildPointerTypeInfo(loc, cast<ObjCObjectPointerType>(ty)->getPointeeType());
     break;
 
   case Type::Pointer:
-    // We need to get the type info for the pointee type.
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andykaylor wrote:

Why did you delete this comment?

https://github.com/llvm/llvm-project/pull/195232