[llvm] [VPlan] Add VPValue for VF, use it for VPWidenIntOrFpInductionRecipe. (PR #95305)

[via llvm-commits]

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@@ -928,8 +928,19 @@ void VPlan::prepareToExecute(Value *TripCountV, Value *VectorTripCountV,
 
   IRBuilder<> Builder(State.CFG.PrevBB->getTerminator());
   // FIXME: Model VF * UF computation completely in VPlan.
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ayalz wrote:

ok, so FIXME remains until a symbolic UF VPValue placeholder is introduced, as follow-up, along with a VPInstruction multiplying it with VF (introduced here), possibly subject to constant folding?

https://github.com/llvm/llvm-project/pull/95305