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

[via llvm-commits]

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@@ -475,11 +469,10 @@ static void addCanonicalIVRecipes(VPlan &Plan, VPBasicBlock *HeaderVPBB,
                        {CanonicalIVIncrement, &Plan.getVectorTripCount()}, DL);
 }
 
-void VPlanTransforms::prepareForVectorization(VPlan &Plan, Type *InductionTy,
-                                              PredicatedScalarEvolution &PSE,
-                                              bool RequiresScalarEpilogueCheck,
-                                              bool TailFolded, Loop *TheLoop,
-                                              DebugLoc IVDL) {
+void VPlanTransforms::prepareForVectorization(
+    VPlan &Plan, Type *InductionTy, PredicatedScalarEvolution &PSE,
+    bool RequiresScalarEpilogueCheck, bool TailFolded, Loop *TheLoop,
+    DebugLoc IVDL, bool HandleUncountableExit, VFRange &Range) {
----------------
ayalz wrote:

```suggestion
    DebugLoc IVDL, bool hasUncountableEarlyExit, VFRange &Range) {
```

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