[llvm] [VPlan] Model branch cond to enter scalar epilogue in VPlan. (PR #92651)

[via llvm-commits]

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@@ -3203,7 +3203,9 @@ class VPlan {
   /// pre-header, followed by a region for the vector loop, followed by the
   /// middle VPBasicBlock.
   static VPlanPtr createInitialVPlan(const SCEV *TripCount,
-                                     ScalarEvolution &PSE, BasicBlock *PH);
+                                     ScalarEvolution &PSE,
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ayalz wrote:

Documentation above deserves updating. Worth removing "skeleton" to avoid confusion, "\p PH" should be rephrased, etc.

https://github.com/llvm/llvm-project/pull/92651