[llvm] [LV][VPlan] Prevent calculate cost for skiped instructions in precomputeCosts(). (PR #127966)

[Florian Hahn via llvm-commits]

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@@ -7291,6 +7291,7 @@ LoopVectorizationPlanner::precomputeCosts(VPlan &Plan, ElementCount VF,
   for (unsigned I = 0; I != ExitInstrs.size(); ++I) {
     Instruction *CondI = ExitInstrs[I];
     if (!OrigLoop->contains(CondI) ||
+        CostCtx.skipCostComputation(CondI, VF.isVector()) ||
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fhahn wrote:

Can we skip adding the instructions directly in the loop above?

https://github.com/llvm/llvm-project/pull/127966