[llvm] [NVPTX] Use v2.u64 to load/store 128-bit values (PR #136638)

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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions cpp -- llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp b/llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp
index 5d965bdd0..972a6af80 100644
--- a/llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp
+++ b/llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp
@@ -185,7 +185,7 @@ getVectorLoweringShape(EVT VectorEVT) {
   const MVT VectorVT = VectorEVT.getSimpleVT();
 
   if (!VectorVT.isVector()) {
-    if(VectorVT == MVT::i128 || VectorVT == MVT::f128)
+    if (VectorVT == MVT::i128 || VectorVT == MVT::f128)
       return {{2, MVT::i64}};
     return std::nullopt;
   }
@@ -5857,7 +5857,8 @@ static void ReplaceLoadVector(SDNode *N, SelectionDAG &DAG,
 
   SDValue LoadChain = NewLD.getValue(NumElts);
 
-  const MVT BuildVecVT = MVT::getVectorVT(EltVT.getScalarType(), ScalarRes.size());
+  const MVT BuildVecVT =
+      MVT::getVectorVT(EltVT.getScalarType(), ScalarRes.size());
   SDValue BuildVec = DAG.getBuildVector(BuildVecVT, DL, ScalarRes);
   SDValue LoadValue = DAG.getBitcast(ResVT, BuildVec);
 

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https://github.com/llvm/llvm-project/pull/136638