[llvm] [VPlan] Introduce VPInstruction::InsertLastLane for start value of VPFirstOrderRecurrencePHIRecipe. (PR #171590)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- llvm/lib/Transforms/Vectorize/VPlan.h llvm/lib/Transforms/Vectorize/VPlanAnalysis.cpp llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp llvm/lib/Transforms/Vectorize/VPlanTransforms.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/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
index c1fdda94a..2dca253cd 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -1443,8 +1443,8 @@ static void simplifyRecipe(VPSingleDefRecipe *Def, VPTypeAnalysis &TypeInfo) {
     return;
   }
 
-  if (match(Def, m_VPInstruction<VPInstruction::InsertLastLane>(
-                     m_VPValue(), m_VPValue(A))))
+  if (match(Def, m_VPInstruction<VPInstruction::InsertLastLane>(m_VPValue(),
+                                                                m_VPValue(A))))
     if (Plan->hasScalarVFOnly())
       return Def->replaceAllUsesWith(A);
 

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https://github.com/llvm/llvm-project/pull/171590