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

[Florian Hahn via llvm-commits]

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@@ -2571,6 +2573,8 @@ class VPReductionRecipe : public VPSingleDefRecipe {
                                  getVecOp(), getCondOp(), IsOrdered);
   }
 
+  // TODO: Support VPExtendedReductionRecipe and VPMulAccRecipe after EVL
+  // support.
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fhahn wrote:

What does this mean?

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