"For the eager reader, we provide a sample iOS app project which has NO license attached so feel free to do whatever you want with it." (https://github.com/light-tech/LLVM-On-iOS)

unfortunately, despite the author's best intentions, the result is exactly opposite, since the absence of license is extremely problematic in many (most? all?) jurisdictions. If the author wants to grant users the freedom to use, modify, and distribute the project, they should attach a permissive open-source license to the project.