[llvm] [VPlan] Introduce ExitPhi VPInstruction, use to create phi for FOR. (PR #94760)

[via llvm-commits]

================
@@ -193,11 +193,18 @@ void VPLiveOut::fixPhi(VPlan &Plan, VPTransformState &State) {
   auto Lane = vputils::isUniformAfterVectorization(ExitValue)
                   ? VPLane::getFirstLane()
                   : VPLane::getLastLaneForVF(State.VF);
-  VPBasicBlock *MiddleVPBB =
+  VPBasicBlock *PredVPBB =
----------------
ayalz wrote:

```suggestion
  VPBasicBlock *MiddleVPBB =
```


https://github.com/llvm/llvm-project/pull/94760