[llvm] [VPlan] Expand VPExpandSCEVRecipes to VPInstructions before CSE. (PR #197643)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- llvm/include/llvm/Analysis/ScalarEvolution.h llvm/include/llvm/Transforms/Utils/ScalarEvolutionExpander.h llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp llvm/lib/Transforms/Vectorize/LoopVectorize.cpp llvm/lib/Transforms/Vectorize/VPlanConstruction.cpp llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp llvm/lib/Transforms/Vectorize/VPlanTransforms.h llvm/lib/Transforms/Vectorize/VPlanUtils.cpp llvm/lib/Transforms/Vectorize/VPlanUtils.h --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 be1e6d7a1..2035cd5ce 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -6163,7 +6163,8 @@ DenseMap<const SCEV *, Value *> LoopVectorizationPlanner::executePlan(
       CM.requiresScalarEpilogue(BestVF.isVector()), &BestVPlan.getVFxUF(),
       MaxRuntimeStep);
   VPlanTransforms::materializeFactors(BestVPlan, VectorPH, BestVF);
-  // Limit expansions to VPInstruction to when not vectorizing the main epilogue loop.
+  // Limit expansions to VPInstruction to when not vectorizing the main epilogue
+  // loop.
   if (EpilogueVecKind == EpilogueVectorizationKind::None)
     VPlanTransforms::expandSCEVExpressions(BestVPlan, *PSE.getSE(), *OrigLoop);
   VPlanTransforms::cse(BestVPlan);

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https://github.com/llvm/llvm-project/pull/197643