[llvm] [VPlan] Impl VPlan-based pattern match for ExtendedRed and MulAccRed (NFCI) (PR #113903)

[David Green via llvm-commits]

davemgreen wrote:

Thanks - There might be some more and that might have just been one of the issues, I will keep trying to test the others and see if anything else comes up.

https://github.com/llvm/llvm-project/pull/113903