[llvm] [AArch64] recognise zip1/zip2 with flipped operands (PR #167235)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- llvm/lib/Target/AArch64/AArch64ISelLowering.cpp llvm/lib/Target/AArch64/AArch64PerfectShuffle.h llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerLowering.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
index 81d904918..6213772c1 100644
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -14754,8 +14754,7 @@ SDValue AArch64TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op,
   unsigned OperandOrder;
   if (isZIPMask(ShuffleMask, NumElts, WhichResult, OperandOrder)) {
     unsigned Opc = (WhichResult == 0) ? AArch64ISD::ZIP1 : AArch64ISD::ZIP2;
-    return DAG.getNode(Opc, DL, V1.getValueType(),
-                       OperandOrder == 0 ? V1 : V2,
+    return DAG.getNode(Opc, DL, V1.getValueType(), OperandOrder == 0 ? V1 : V2,
                        OperandOrder == 0 ? V2 : V1);
   }
   if (isUZPMask(ShuffleMask, NumElts, WhichResult)) {

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https://github.com/llvm/llvm-project/pull/167235