[llvm] [SelectionDAG][RISCV] (add (vscale * C0), (vscale * C1)) to (vscale * (C0 + C1)) in getNode. (PR #144565)

[Craig Topper via llvm-commits]

topperc wrote:

> LGTM. To double check this is needed to catch vscales generated during op legalization that won't get a chance to go through a DAG combine pass?

Correct.

https://github.com/llvm/llvm-project/pull/144565