[clang] [llvm] [RISCV] Support Packed Multiplication with Horizontal Addition (PR #218430)

[Craig Topper via llvm-commits]

topperc wrote:

Please don't force push. If you want to merge main use a merge commit. https://llvm.org/docs/GitHub.html#rebasing-pull-requests-and-force-pushes

https://github.com/llvm/llvm-project/pull/218430