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

[David Sherwood via llvm-commits]

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@@ -1114,7 +1114,6 @@ InstructionCost VPRecipeWithIRFlags::getCostForRecipeWithOpcode(
   Type *ResultTy = VF.isVector() ? toVectorTy(ScalarTy, VF) : ScalarTy;
   switch (Opcode) {
   case Instruction::FNeg:
-    return Ctx.TTI.getArithmeticInstrCost(Opcode, ResultTy, Ctx.CostKind);
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david-arm wrote:

Ok thanks, although I can't see Switch/Alloca here? Is that because you're letting them fall through to the default case (cost=0) now?

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