[llvm] [LV] Move check if any vector insts will be generated to VPlan. (PR #96622)

[via llvm-commits]

================
@@ -1648,12 +1648,7 @@ class LoopVectorizationCostModel {
 
   /// Returns the execution time cost of an instruction for a given vector
   /// width. Vector width of one means scalar.
-  VectorizationCostTy getInstructionCost(Instruction *I, ElementCount VF);
-
-  /// The cost-computation logic from getInstructionCost which provides
-  /// the vector type as an output parameter.
-  InstructionCost getInstructionCost(Instruction *I, ElementCount VF,
-                                     Type *&VectorTy);
+  InstructionCost getInstructionCost(Instruction *I, ElementCount VF);
----------------
ayalz wrote:

Could `VectorizationCostTy` be retired?

https://github.com/llvm/llvm-project/pull/96622