[llvm] [VPlan] Move call widening decision to VPlan. (NFCI) (PR #195518)

[Ramkumar Ramachandra via llvm-commits]

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@@ -3644,6 +3624,40 @@ InstructionCost VPReplicateRecipe::computeCost(ElementCount VF,
   return Ctx.getLegacyCost(UI, VF);
 }
 
+InstructionCost VPReplicateRecipe::computeScalarCallCost(
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artagnon wrote:

Hm, not sure if this function is named correctly? Better to name it computeCallCost, that accepts IsSingleScalar? It's nested within VPRecplicateRecipe anyway, so it's clear that it's a replication cost?

https://github.com/llvm/llvm-project/pull/195518