[flang-commits] [flang] [Flang] Canonicalize divdc3 calls into arithmetic-based complex division (PR #146017)

[Shunsuke Watanabe via flang-commits]

s-watanabe314 wrote:

Thank you for working on this!

Actually, we've been discussing a similar feature on Discourse. You can refer to it here if you're interested: (https://discourse.llvm.org/t/optimization-of-complex-number-division/83468)

I'm currently working on a feature based on the discussion at the end of that thread, and I plan to post the patch next week. In that patch, specifying the newly added driver option `-fcomplex-arithmetic=basic` will allow complex number division to be expanded into a algebraic formula instead of using a runtime function.

https://github.com/llvm/llvm-project/pull/146017