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

[Florian Hahn via llvm-commits]

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@@ -7345,8 +7354,9 @@ DenseMap<const SCEV *, Value *> LoopVectorizationPlanner::executePlan(
     } else {
       // Keep all loop hints from the original loop on the vector loop (we'll
       // replace the vectorizer-specific hints below).
-      if (MDNode *LID = OrigLoop->getLoopID())
-        L->setLoopID(LID);
+      if (BestVPlan.getScalarPreheader()->getNumPredecessors() > 0)
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fhahn wrote:

The code below will execute in in the general `else{`, so I left it as-is for now.

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