[llvm] [VPlan] Model middle block via VPIRBasicBlock. (PR #95816)

[via llvm-commits]

================
@@ -851,6 +863,9 @@ void VPlan::execute(VPTransformState *State) {
   State->CFG.ExitBB = State->CFG.PrevBB->getSingleSuccessor();
   BasicBlock *VectorPreHeader = State->CFG.PrevBB;
   State->Builder.SetInsertPoint(VectorPreHeader->getTerminator());
+  replaceVPBBWithIRVPBB(
----------------
ayalz wrote:

Another option may be to place this in prepareToExecute(), as its finalizing VPlan before actually generating code.

https://github.com/llvm/llvm-project/pull/95816