[llvm] [IR][Float8] Add two kinds float8 IR type (PR #89900)

[Nikita Popov via llvm-commits]

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

You're going to need a new RFC for this. Please check https://discourse.llvm.org/t/add-llvm-type-support-for-fp8-data-types-f8e4m3-and-f8e5m2/67598 and https://reviews.llvm.org/D140088 to get some background on why this has been rejected in this past.

https://github.com/llvm/llvm-project/pull/89900