llvm-project

dc27696e - [Clang] disallow constexpr with auto and explicit type in C23 (#163469)

[Clang] disallow constexpr with auto and explicit type in C23 (#163469) Fixes #163090 --- This PR addresses the issue of Clang not diagnosing the invalid combination of `constexpr`, `auto`, and an explicit type ```c constexpr auto int x = 0 ```