[llvm] [llvm] Add support for zero-width integers in MathExtras.h (PR #87193)

[Théo Degioanni via llvm-commits]

Moxinilian wrote:

I have walked through the entire file to check that i0 is supported. Although it’s probably a good ideas to add tests even where it works to make sure there is no regression. I can look at that, probably after EuroLLVM.

https://github.com/llvm/llvm-project/pull/87193