[VPlan] Inline addVPValue into single caller (NFCI).

Inline the function into its single caller.

Author: fhahn

llvm/lib/Transforms/Vectorize/VPlan.h

@@ -3006,21 +3006,16 @@ class VPlan {
 
   void setName(const Twine &newName) { Name = newName.str(); }
 
-  void addVPValue(Value *V, VPValue *VPV) {
-    assert(VPV->isLiveIn() && "VPV must be a live-in.");
-    assert(V && "Trying to add a null Value to VPlan");
-    assert(!Value2VPValue.count(V) && "Value already exists in VPlan");
-    Value2VPValue[V] = VPV;
-  }
-
   /// Gets the live-in VPValue for \p V or adds a new live-in (if none exists
   ///  yet) for \p V.
   VPValue *getOrAddLiveIn(Value *V) {
     assert(V && "Trying to get or add the VPValue of a null Value");
     if (!Value2VPValue.count(V)) {
       VPValue *VPV = new VPValue(V);
       VPLiveInsToFree.push_back(VPV);
-      addVPValue(V, VPV);
+      assert(VPV->isLiveIn() && "VPV must be a live-in.");
+      assert(!Value2VPValue.count(V) && "Value already exists in VPlan");
+      Value2VPValue[V] = VPV;
     }
 
     assert(Value2VPValue.count(V) && "Value does not exist in VPlan");