[llvm] [LV][EVL] Support in-loop reduction using tail folding with EVL. (PR #90184)

[Mel Chen via llvm-commits]

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@@ -1652,6 +1694,29 @@ void VPReductionRecipe::print(raw_ostream &O, const Twine &Indent,
     O << " (with final reduction value stored in invariant address sank "
          "outside of loop)";
 }
+
+void VPReductionEVLRecipe::print(raw_ostream &O, const Twine &Indent,
+                                 VPSlotTracker &SlotTracker) const {
+  O << Indent << "REDUCE ";
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Mel-Chen wrote:

I prefer we should temporarily align with the existing EVL recipe. 
Later, we can gather all the developers involved with EVL vectorization to discuss how to standardize the print format for EVL recipes.

https://github.com/llvm/llvm-project/pull/90184