fixup! Revert "[LV] Vectorize Epilogues for loops with small VF but high IC (llvm#108190)"

Author: juliannagele

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -4643,11 +4643,10 @@ bool LoopVectorizationCostModel::isEpilogueVectorizationProfitable(
     return false;
 
   unsigned Multiplier = 1;
-  if (VF.isScalable())
-    Multiplier = getVScaleForTuning(TheLoop, TTI).value_or(1);
-  if ((Multiplier * VF.getKnownMinValue()) >= EpilogueVectorizationMinVF)
-    return true;
-  return false;
+  unsigned MinVFThreshold = EpilogueVectorizationMinVF.getNumOccurrences() > 0
+    ? EpilogueVectorizationMinVF
+    : TTI.getEpilogueVectorizationMinVF();
+  return getEstimatedRuntimeVF(TheLoop, TTI, VF * Multiplier) >= MinVFThreshold;
 }
 
 VectorizationFactor LoopVectorizationPlanner::selectEpilogueVectorizationFactor(