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

[Florian Hahn via llvm-commits]

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@@ -9383,7 +9383,8 @@ LoopVectorizationPlanner::tryToBuildVPlanWithVPRecipes(VFRange &Range) {
   VPlanTransforms::prepareForVectorization(
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fhahn wrote:

Will to separately. 

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