[llvm] [InstCombine] Simplification for (-a * b) / (a * b). (PR #71768)

[Nikita Popov via llvm-commits]

https://github.com/nikic requested changes to this pull request.

As far as I can tell, all the tests you have added already fold without the patch: https://llvm.godbolt.org/z/z4W9KhP3b

Please adjust the test coverage to check cases that are actually newly supported with this patch.

https://github.com/llvm/llvm-project/pull/71768