[flang] [llvm] [flang][OpenMP] Parase `bind` clause for `loop` direcitve. (PR #113662)

[Michael Klemm via llvm-commits]

https://github.com/mjklemm commented:

Please leave a TODO message for code-gen.  Also, we will need to add semantic checks to check for the right nesting of `bind`, where the compiler can check it.

https://github.com/llvm/llvm-project/pull/113662