[llvm] [llvm][mc][riscv] MC support of T-Head vector extension (xtheadvector) (PR #84447)

[via llvm-commits]

imkiva wrote:

> Thanks for working on this. I plan to experiment with this on an SG2042 system soon.
> 
> I also created a PR to rebase this on `main` and fix the build: [kata-ark#1](https://github.com/kata-ark/llvm-project/pull/1)

Oh, There's a more complete version (with more intrinsics, rather than only MC instructions) on https://github.com/ruyisdk/llvm-project which is based on LLVM 17.0.6. Maybe worth a try? 😉 


https://github.com/llvm/llvm-project/pull/84447