[llvm] IR2Builder tool for converting LLVM IR files into C++ IRBuilder API (PR #117129)

[Marek Sedláček via llvm-commits]

mark-sed wrote:

> Reiterating some earlier comments, is there some unit test for this? Do we need something basic for smoke testing?

Adding some unittests is a good idea. I'll look into that. 

> Also, what's the evolution story for this tool? Are folks expected to update it as IR changes happen?

That would be the ideal case, but of course I expect that there will be cases where people forget about adding the new IR here. But fortunately this tool is made in a way that it will still work, it might generate integer instead of an enum value or a `TODO: ` which will also point to the missing constructs.
What would really need updating are some major changes to IRBuilder, that is stuff that could make the generator create non-compilable code.

https://github.com/llvm/llvm-project/pull/117129