[llvm] [LoopVectorizer] Add support for partial reductions (PR #92418)

[Florian Hahn via llvm-commits]

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@@ -1962,6 +1970,35 @@ class VPReductionPHIRecipe : public VPHeaderPHIRecipe {
   bool isInLoop() const { return IsInLoop; }
 };
 
+class VPPartialReductionRecipe : public VPRecipeWithIRFlags {
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fhahn wrote:

If this is a VPSingleDef recipe, VPSingleDefRecipe::classof needs to be updated

https://github.com/llvm/llvm-project/pull/92418