[llvm] [VPlan] Add exit phi operands during initial construction (NFC). (PR #136455)

[via llvm-commits]

================
@@ -352,6 +352,20 @@ std::unique_ptr<VPlan> PlainCFGBuilder::buildPlainCFG(
   Plan->getEntry()->setOneSuccessor(getOrCreateVPBB(TheLoop->getHeader()));
   Plan->getEntry()->setPlan(&*Plan);
 
+  // Fix VPlan loop-closed-ssa exit phi's by add incoming operands to the
----------------
ayalz wrote:

```suggestion
  // Fix VPlan loop-closed-ssa exit phi's by adding incoming operands to the
```

https://github.com/llvm/llvm-project/pull/136455