[llvm] [VPlan] Compute scalar cost based on VPlan0 instead of legacy CM. (PR #196845)

[Florian Hahn via llvm-commits]

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@@ -4161,42 +4155,6 @@ InstructionCost LoopVectorizationCostModel::computePredInstDiscount(
   return Discount;
 }
 
-InstructionCost LoopVectorizationCostModel::expectedCost(ElementCount VF) {
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fhahn wrote:

Sounds good, I added it back + option, although I think we should remove it soon

https://github.com/llvm/llvm-project/pull/196845