[llvm] [RISCV] Move RISCVVType namespace to Support (PR #83222)

[Craig Topper via llvm-commits]

topperc wrote:

> > Is it possible to move them to TargetParser instead?
> 
> Yes, I think we can. But is there any specific reason?

The Support library shouldn't contain target specific code if possible. The only reason RISCVISAInfo is in there is because TableGen uses it.

https://github.com/llvm/llvm-project/pull/83222