[llvm] [VPlan] Materialize VF and VFxUF using VPInstructions. (PR #152879)

[Luke Lau via llvm-commits]

================
@@ -3340,6 +3340,33 @@ void VPlanTransforms::materializeVectorTripCount(VPlan &Plan,
   VectorTC.replaceAllUsesWith(Res);
 }
 
+void VPlanTransforms::materializeVFAndVFxUF(VPlan &Plan, VPBasicBlock *VectorPH,
+                                            ElementCount VFEC) {
+  VPBuilder Builder(VectorPH, VectorPH->begin());
+  auto *TCTy = VPTypeAnalysis(Plan).inferScalarType(Plan.getTripCount());
----------------
lukel97 wrote:

Nit, for simple types do we not usually explicitly write them instead of auto?

https://github.com/llvm/llvm-project/pull/152879