[llvm] [PowerPC] Custom Lower ABDU using branchless carry (PR #182704)

[Lei Huang via llvm-commits]

https://github.com/lei137 commented:

Thanks for the patch.

Perhaps some tests for edge cases (0, MAX_INT), and negative test when optimization shouldn't be applied be added as well.

Also it seems the tests you added/updated are currently failing.   Would be good to rebase and ensure the CI bots are green.

https://github.com/llvm/llvm-project/pull/182704