[llvm] [SLP]: Introduce and use getDataFlowCost (PR #112999)

[Alexey Bataev via llvm-commits]

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@@ -9075,15 +9075,16 @@ BoUpSLP::getEntryCost(const TreeEntry *E, ArrayRef<Value *> VectorizedVals,
   auto *FinalVecTy = FixedVectorType::get(ScalarTy, EntryVF);
 
   bool NeedToShuffleReuses = !E->ReuseShuffleIndices.empty();
+  InstructionCost CommonCost = 0;
   if (E->State == TreeEntry::NeedToGather) {
     if (allConstant(VL))
-      return 0;
+      return CommonCost;
     if (isa<InsertElementInst>(VL[0]))
       return InstructionCost::getInvalid();
-    return processBuildVector<ShuffleCostEstimator, InstructionCost>(
-        E, ScalarTy, *TTI, VectorizedVals, *this, CheckedExtracts);
+    return CommonCost +
+           processBuildVector<ShuffleCostEstimator, InstructionCost>(
+               E, ScalarTy, *TTI, VectorizedVals, *this, CheckedExtracts);
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alexey-bataev wrote:

Drop all these changes

https://github.com/llvm/llvm-project/pull/112999