[llvm] [VPlan] Hook IR blocks into VPlan during skeleton creation (NFC) (PR #114292)

[via llvm-commits]

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@@ -8074,6 +8090,15 @@ EpilogueVectorizerEpilogueLoop::emitMinimumVectorEpilogueIterCountCheck(
   }
   ReplaceInstWithInst(Insert->getTerminator(), &BI);
   LoopBypassBlocks.push_back(Insert);
+
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ayalz wrote:

Entry is conceptually an immutable VPIRBB that wraps the original scalar preheader, where SCEVs can be safely expanded, and all runtime checks are added as successors starting with minimal trip count check that is added as its terminal. Does this change when executing the VPlan of an epilog loop, whose Entry is replicated and transformed from old to new?

https://github.com/llvm/llvm-project/pull/114292