[llvm] [LoopVectorizer][AArch64] Add support for partial reduce subtraction (PR #123636)

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``````````bash
git-clang-format --diff c6b13a28717455028bf48bcb20f723ad3bbff783 3757dd563436543b442d37e8bf705987ced51fb8 --extensions cpp -- llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp llvm/lib/Transforms/Vectorize/LoopVectorize.cpp llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
index 4dced4345b..b97e683cb4 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
@@ -295,9 +295,7 @@ VPPartialReductionRecipe::computeCost(ElementCount VF,
 
   // If BinOp is a negation, use the side effect of match to assign the actual
   // binary operation to BinOp
-  match(BinOp, m_Binary<Instruction::Sub>(
-                   m_SpecificInt(0),
-                   m_VPValue(BinOp)));
+  match(BinOp, m_Binary<Instruction::Sub>(m_SpecificInt(0), m_VPValue(BinOp)));
   VPRecipeBase *BinOpR = BinOp->getDefiningRecipe();
 
   if (auto *WidenR = dyn_cast<VPWidenRecipe>(BinOpR))

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https://github.com/llvm/llvm-project/pull/123636