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

[Florian Hahn via llvm-commits]

================
@@ -2694,6 +2724,202 @@ class VPReductionEVLRecipe : public VPReductionRecipe {
   }
 };
 
+/// A recipe to represent inloop extended reduction operations, performing a
----------------
fhahn wrote:

can you also include what operands are extended and what types are used?

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