[clang] [llvm] [LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (PR #112548)

[Christian Ulmann via cfe-commits]

Dinistro wrote:

We have a, temporary, odd use-case where we need to feed the textual IR back to a tool that is built with LLVM 17. For now, we were able to bypass all incompatibilities by simple workarounds on either the LLVM head, or on the LLVM 17 side. Unfortunately, this change seems the first change that leads to a non-trivial breakage that we cannot temporary circumvent.

I'm aware that our use case is not officially supported, I just wanted to check what is supposed to happen. We will find a way to deal with this.

Either way, thanks for the quick answer and thanks for working on improvements like these 🙂 

https://github.com/llvm/llvm-project/pull/112548