[llvm] [SLPVectorizer][NVPTX] Customize getBuildVectorCost for NVPTX (PR #128077)

[Alexey Bataev via llvm-commits]

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@@ -10203,6 +10203,9 @@ class BoUpSLP::ShuffleCostEstimator : public BaseShuffleAnalysis {
     if ((!Root && allConstant(VL)) || all_of(VL, IsaPred<UndefValue>))
       return TTI::TCC_Free;
     auto *VecTy = getWidenedType(ScalarTy, VL.size());
+    if (auto Cost = TTI.getBuildVectorCost(VecTy, VL, CostKind);
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alexey-bataev wrote:

It should not be here. Rework getScalarizationOverhead instead

https://github.com/llvm/llvm-project/pull/128077