[llvm] [VPlan] Simplify Plan's entry in removeBranchOnConst. (PR #154510)

[via llvm-commits]

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@@ -1648,12 +1661,15 @@ static void addRuntimeUnrollDisableMetaData(Loop *L) {
 }
 
 void LoopVectorizationPlanner::updateLoopMetadataAndProfileInfo(
-    Loop *VectorLoop, VPBasicBlock *HeaderVPBB, bool VectorizingEpilogue,
-    unsigned EstimatedVFxUF, bool DisableRuntimeUnroll) {
-  MDNode *LID = OrigLoop->getLoopID();
+    Loop *VectorLoop, VPBasicBlock *HeaderVPBB, const VPlan &Plan,
+    bool VectorizingEpilogue, MDNode *LID,
+    std::optional<unsigned> OrigAverageTripCount,
+    unsigned OrigLoopInvocationWeight, unsigned EstimatedVFxUF,
+    bool DisableRuntimeUnroll) {
   // Update the metadata of the scalar loop. Skip the update when vectorizing
-  // the epilogue loop, to ensure it is only updated once.
-  if (!VectorizingEpilogue) {
+  // the epilogue loop, to ensure it is only updated once, or when the became
+  // unreachable.
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ayalz wrote:

```suggestion
  // the epilogue loop to ensure it is updated only once. Also skip the update
  // when the scalar loop became unreachable.
```

https://github.com/llvm/llvm-project/pull/154510