[llvm] [VPlan] Connect (MemRuntime|SCEV)Check blocks as VPlan transform (NFC). (PR #143879)

[Florian Hahn via llvm-commits]

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@@ -7402,6 +7308,12 @@ DenseMap<const SCEV *, Value *> LoopVectorizationPlanner::executePlan(
       ILV.getOrCreateVectorTripCount(ILV.LoopVectorPreHeader), State);
   replaceVPBBWithIRVPBB(VectorPH, State.CFG.PrevBB);
 
+  // Move check blocks to their final position.
+  if (BasicBlock *MemCheckBlock = ILV.RTChecks.getMemCheckBlock())
+    MemCheckBlock->moveAfter(EntryBB);
+  if (BasicBlock *SCEVCheckBlock = ILV.RTChecks.getSCEVCheckBlock())
+    SCEVCheckBlock->moveAfter(EntryBB);
+
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fhahn wrote:

The control-flow is completely modeled in VPlan. This is just the position in the function, added a TODO

https://github.com/llvm/llvm-project/pull/143879