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

[via llvm-commits]

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@@ -2428,6 +2428,26 @@ InnerLoopVectorizer::getOrCreateVectorTripCount(BasicBlock *InsertBlock) {
   return VectorTripCount;
 }
 
+/// Introduces a new VPIRBasicBlock for \p CheckIRBB to \p Plan between the
+/// vector preheader and its predecessor, also connecting the new block to the
+/// scalar preheader.
+static void introduceCheckBlockInVPlan(VPlan &Plan, BasicBlock *CheckIRBB) {
+
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ayalz wrote:

```suggestion
```

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