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

[Graham Hunter via llvm-commits]

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@@ -308,6 +308,75 @@ InstructionCost VPRecipeBase::computeCost(ElementCount VF,
   return UI ? Ctx.getLegacyCost(UI, VF) : 0;
 }
 
+void VPPartialReductionRecipe::execute(VPTransformState &State) {
+  State.setDebugLocFrom(getDebugLoc());
+  auto &Builder = State.Builder;
+
+  switch (Opcode) {
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huntergr-arm wrote:

Please remove the redundant switch; there's another which checks the Opcode below.

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