[compiler-rt] [compiler-rt] Restore unsigned value in struct, use enum only in function (PR #165048)

[Saleem Abdulrasool via llvm-commits]

https://github.com/compnerd approved this pull request.

There are some small improvements that can be made, but I don't think we should hold this up. Please go ahead and merge to unblock the build issue.

https://github.com/llvm/llvm-project/pull/165048