[llvm] [VPlan] Use DomTreeUpdater to automatically update DT for vector loop. (PR #92525)

[via llvm-commits]

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@@ -829,6 +832,9 @@ void VPlan::execute(VPTransformState *State) {
   BasicBlock *VectorPreHeader = State->CFG.PrevBB;
   State->Builder.SetInsertPoint(VectorPreHeader->getTerminator());
 
+  State->DTU.applyUpdates(
+      {{DominatorTree::Delete, VectorPreHeader, State->CFG.ExitBB}});
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ayalz wrote:

ExitBB is (still, the single) successor of PrevBB=VectorPreHeader, should they first be disconnected before updating DTU with their edge's deletion?

https://github.com/llvm/llvm-project/pull/92525