[llvm] [RISCV] Vectorize phi for loop carried @llvm.vp.reduce.* (PR #131974)

[via llvm-commits]

NexMing wrote:

> > Could someone help merge this PR?
> 
> I'm just noticing it looks like you're a member of the LLVM organization, does that mean you already have commit access?

I applied for permissions back when LLVM was using Phabricator, but they may have been revoked due to long-term inactivity. Do I need to reapply for the permissions now?

https://github.com/llvm/llvm-project/pull/131974