[llvm] [VPlan] Add ReductionStartVector VPInstruction. (PR #142290)

[Florian Hahn via llvm-commits]

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@@ -395,6 +397,10 @@ static unsigned getVFScaleFactor(VPRecipeBase *R) {
     return RR->getVFScaleFactor();
   if (auto *RR = dyn_cast<VPPartialReductionRecipe>(R))
     return RR->getVFScaleFactor();
+  if (auto *VPI = dyn_cast<VPInstruction>(R))
+    assert(
+        VPI->getOpcode() != VPInstruction::ReductionStartVector &&
+        "getting scaling factor of reduction-start-vector not implemented yet");
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fhahn wrote:

Updated thanks

https://github.com/llvm/llvm-project/pull/142290