[llvm] [VPlan] Create epilogue minimum iteration check in VPlan. (PR #157545)

[via llvm-commits]

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@@ -117,6 +117,13 @@ struct VPlanTransforms {
       bool TailFolded, bool CheckNeededWithTailFolding, Loop *OrigLoop,
       const uint32_t *MinItersBypassWeights, DebugLoc DL, ScalarEvolution &SE);
 
+  /// Add a check to \p Plan to see if the epilogue vector loop should be
+  /// executed.
+  static void addMinimumVectorEpilogueIterationCheck(
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ayalz wrote:

When/should `LLVM_ABI_FOR_TEST` be added?

https://github.com/llvm/llvm-project/pull/157545