[llvm] [VPlan] Handle early exit before forming regions. (NFC) (PR #138393)

[via llvm-commits]

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@@ -173,15 +174,16 @@ struct VPlanTransforms {
   /// Remove dead recipes from \p Plan.
   static void removeDeadRecipes(VPlan &Plan);
 
-  /// Update \p Plan to account for the uncountable early exit block in \p
-  /// UncountableExitingBlock by
+  /// Update \p Plan to account for the uncountable early exit from \p
+  /// EarlyExitingVPBB to \p EarlyExitVPBB by
   ///  * updating the condition exiting the vector loop to include the early
   ///    exit conditions
   ///  * splitting the original middle block to branch to the early exit block
   ///    if taken.
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ayalz wrote:

```suggestion
  ///    conditionally - according to the early exit condition.
```

https://github.com/llvm/llvm-project/pull/138393