[llvm] [VPlan] Manage created blocks directly in VPlan. (NFC) (PR #120918)

[via llvm-commits]

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@@ -8189,11 +8189,10 @@ EpilogueVectorizerEpilogueLoop::emitMinimumVectorEpilogueIterCountCheck(
 
   // A new entry block has been created for the epilogue VPlan. Hook it in, as
   // otherwise we would try to modify the entry to the main vector loop.
-  VPIRBasicBlock *NewEntry = VPIRBasicBlock::fromBasicBlock(Insert);
+  VPIRBasicBlock *NewEntry = Plan.createVPIRBasicBlock(Insert);
   VPBasicBlock *OldEntry = Plan.getEntry();
   VPBlockUtils::reassociateBlocks(OldEntry, NewEntry);
   Plan.setEntry(NewEntry);
-  delete OldEntry;
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ayalz wrote:

Perhaps worth leaving behind a note that OldEntry is now dead and will be collected later? Same with other deleted deletes.

https://github.com/llvm/llvm-project/pull/120918