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

[via llvm-commits]

================
@@ -4879,6 +4874,52 @@ static void emitInvalidCostRemarks(SmallVector<InstructionVFPair> InvalidCosts,
   } while (!Tail.empty());
 }
 
+static bool willGenerateVectorInstructions(VPlan &Plan, ElementCount VF,
+                                           const TargetTransformInfo &TTI) {
----------------
ayalz wrote:

Assert VF is vector?

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