[llvm] [LV] Simplify epilogue VF selection by comparing against MaxTripCount (PR #186185)

via llvm-commits llvm-commits at lists.llvm.org
Fri Apr 17 08:19:26 PDT 2026


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/Vectorize/LoopVectorize.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index f2b3a7144..0bb750f74 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -4319,7 +4319,7 @@ std::unique_ptr<VPlan> LoopVectorizationPlanner::selectBestEpiloguePlan(
     MaxTripCount = SE.getUnsignedRangeMax(RemainingIterations).getZExtValue();
   LLVM_DEBUG(dbgs() << "LEV: Maximum Trip Count for Epilogue: " << MaxTripCount
                     << "\n");
-  
+
   VectorizationFactor Result = VectorizationFactor::Disabled();
   VPlan *BestPlan = nullptr;
   for (auto &NextVF : ProfitableVFs) {

``````````

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https://github.com/llvm/llvm-project/pull/186185


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