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

[Florian Hahn via llvm-commits]

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@@ -57,6 +58,11 @@ class VectorBuilder {
     return RetType();
   }
 
+  // Helper function for creating VP intrinsic call.
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fhahn wrote:

independent of this change, but if `VectorBuilder` only supports generation of vector-predication intrinsics, then it would be better to call it `VectorPredicationBuilder` to avoid confusion

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