[llvm] [LV] Support interleaving in order to reduce stalls (PR #197959)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- llvm/include/llvm/Analysis/TargetTransformInfo.h llvm/include/llvm/Analysis/TargetTransformInfoImpl.h llvm/include/llvm/CodeGen/BasicTTIImpl.h llvm/lib/Analysis/TargetTransformInfo.cpp llvm/lib/Transforms/Vectorize/LoopVectorize.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 2da6b9f50..5d4e942f1 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -3848,8 +3848,9 @@ LoopVectorizationPlanner::selectInterleaveCount(VPlan &Plan, ElementCount VF,
 
   // FIXME: VF is required to be a vector only because there are several recipes
   // whose computeCost function asserts that the VF is a vector.
-  if ((TTI.shouldInterleaveToReduceStalls() || EnableInterleaveToReduceStalls)
-      && VF.isVector()) {
+  if ((TTI.shouldInterleaveToReduceStalls() ||
+       EnableInterleaveToReduceStalls) &&
+      VF.isVector()) {
     LLVM_DEBUG(dbgs() << "LV: Interleaving to reduce stall cycles due to "
                          "instruction latency.\n");
     VPCostContext LatencyCtx(*TLI, Plan, *CM, Config,

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https://github.com/llvm/llvm-project/pull/197959