Update condition for CORINFO_FLG_OPAQUE_BLOB in src/coreclr/tools/Common/JitInterface/CorInfoImpl.cs

Author: echesakov

src/coreclr/tools/Common/JitInterface/CorInfoImpl.cs

@@ -1986,8 +1986,8 @@ private uint getClassAttribsInternal(TypeDesc type)
                     result |= CorInfoFlag.CORINFO_FLG_BYREF_LIKE;
 
                 // The CLR has more complicated rules around CUSTOMLAYOUT, but this will do.
-                if (metadataType.IsExplicitLayout || (metadataType.IsSequentialLayout && metadataType.GetClassLayout().Size != 0) || metadataType.IsWellKnownType(WellKnownType.TypedReference))
-                    result |= CorInfoFlag.CORINFO_FLG_CUSTOMLAYOUT;
+                if (metadataType.IsExplicitLayout || metadataType.IsWellKnownType(WellKnownType.TypedReference))
+                    result |= CorInfoFlag.CORINFO_FLG_OPAQUE_BLOB;
 
                 if (metadataType.IsUnsafeValueType)
                     result |= CorInfoFlag.CORINFO_FLG_UNSAFE_VALUECLASS;