[llvm] [VPlan] Add VPlan-based addMinIterCheck, replace ILV for non-epilogue. (PR #153643)

[Florian Hahn via llvm-commits]

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@@ -7327,6 +7257,17 @@ DenseMap<const SCEV *, Value *> LoopVectorizationPlanner::executePlan(
       BestVPlan.resetTripCount(Exp);
     ExpSCEV->eraseFromParent();
   }
+  // SCEV expansion will add new instructions in the IRBB wrapped by Entry.
+  // Remove existing VPIRInstructions/VPIRPhi and re-create them to make sure
+  // all IR instructions are wrapped. Otherwise VPInstructions may be inserted
+  // at the wrong place.
+  for (VPRecipeBase &R : make_early_inc_range(*Entry)) {
+    if (!isa<VPIRInstruction, VPIRPhi>(&R))
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fhahn wrote:

Added an assert at the new place, thanks!

https://github.com/llvm/llvm-project/pull/153643