[llvm-branch-commits] [llvm] backport: [RISCV] Sources of vmerge shouldn't overlap V0 (#170070) (PR #170604)

[Philip Reames via llvm-branch-commits]

preames wrote:

> I also want to emphasize that this will be the last 21.x release, so any problems that arise from this change will NOT be fixed until 22.x.

I would lean towards leaving this unfixed in 21.x as 22.x should be released relatively soon, and the risk to the last point release (the one more folks than usual might rely on) is somewhat high.  

https://github.com/llvm/llvm-project/pull/170604