[flang-commits] [clang] [flang] [flang][OpenMP] Upstream `do concurrent` loop-nest detection. (PR #127595)

[Kareem Ergawy via flang-commits]

ergawy wrote:

@kiranchandramohan @clementval thanks for your comments (and sorry for the late response, I was off yesterday).

Sure, we can works on a multi-range loop op in FIR, our team did not write the current loop op definition so I was working with what I have.

Just to be on the same page, do you suggest to have a separate op for `do concurrent` (separate from the current `fir.do_loop` op)? Or extend the current to model:
- multi-range iteration
- and multi-block loop bodies?

I am leaning towards extending the current op to be more capable/flexible but if you have any reasons not to do so, please let me know.

In any case, there is not problem blocking this PR until we can model multi-range loops (at least, maybe we can defer multi-block loops to a later point).

https://github.com/llvm/llvm-project/pull/127595