[llvm] [LV] Add a statistic for early exit vectorization (PR #145730)

[Florian Hahn via llvm-commits]

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@@ -10291,6 +10293,9 @@ bool LoopVectorizePass::processLoop(Loop *L) {
         auto ExpandedSCEVs = LVP.executePlan(EPI.MainLoopVF, EPI.MainLoopUF,
                                              *BestMainPlan, MainILV, DT, false);
         ++LoopsVectorized;
+        // TODO: Currently unsupported for early exits.
+        if (BestPlan.hasEarlyExit())
+          ++LoopsEarlyExitVectorized;
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fhahn wrote:

Can we just increment the statistic in a single place, like `executePlan`?

https://github.com/llvm/llvm-project/pull/145730