[llvm] [mlir] [llvm][OpenMP] Add implicit cast to omp.atomic.read (PR #114659)

[Michael Kruse via llvm-commits]

https://github.com/Meinersbur commented:

I wonder we should use #101966 instead which handles type punning consistently by itself (https://github.com/llvm/llvm-project/blob/ee84c6bb3146d25f21c14d6d8e0abb794683f5ec/llvm/lib/Transforms/Utils/BuildBuiltins.cpp#L123-L131)

https://github.com/llvm/llvm-project/pull/114659