[llvm] [VPlan] Return Max from computeCost without underlying instrs. (PR #109708)

[via llvm-commits]

================
@@ -276,14 +276,6 @@ static Instruction *getInstructionForCost(const VPRecipeBase *R) {
     return dyn_cast_or_null<Instruction>(S->getUnderlyingValue());
----------------
ayalz wrote:

Ah, right. May be good to revisit this intention.

https://github.com/llvm/llvm-project/pull/109708