[flang] [mlir] [flang][OpenMP] Ignore DECLARE_SIMD and warn about missing implementa… (PR #232712)

[Markus Mützel via flang-commits]

mmuetzel wrote:

Fwiw, the change proposed here and the one merged in #232367 have been cherry-picked to the Flang and MLIR packages that are distributed by MSYS2:
https://github.com/msys2/MINGW-packages/pull/32550

Would it make sense to do the same here and cherry-pick them for LLVM 23.1.4 (or whatever version is next)?


https://github.com/llvm/llvm-project/pull/232712