[llvm] [VPlan] Add initial VPScalarEvolution, use to get trip count SCEV (NFC) (PR #94464)

[via llvm-commits]

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@@ -67,6 +67,7 @@ class VPTypeAnalysis {
 // Collect a VPlan's ephemeral recipes (those used only by an assume).
 void collectEphemeralRecipesForVPlan(VPlan &Plan,
                                      DenseSet<VPRecipeBase *> &EphRecipes);
+
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ayalz wrote:

```suggestion
```


https://github.com/llvm/llvm-project/pull/94464