[llvm] Port `NVPTXTargetLowering::LowerCONCAT_VECTORS` to SelectionDAG (PR #120030)

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git-clang-format --diff bf700c39d1c9f88387bfe2ec4567567397200ea3 a6aa2c50a0322e22e0a870c16fa494e01f2b2143 --extensions h,cpp -- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp llvm/lib/Target/NVPTX/NVPTXISelLowering.h
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 88031c0425..14176f8325 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -191,7 +191,7 @@ private:
   SDValue ExpandExtractFromVectorThroughStack(SDValue Op);
   SDValue ExpandInsertToVectorThroughStack(SDValue Op);
   SDValue ExpandVectorBuildThroughStack(SDNode* Node);
-  SDValue ExpandConcatVectors(SDNode* Node);
+  SDValue ExpandConcatVectors(SDNode *Node);
 
   SDValue ExpandConstantFP(ConstantFPSDNode *CFP, bool UseCP);
   SDValue ExpandConstant(ConstantSDNode *CP);
@@ -1531,7 +1531,8 @@ SDValue SelectionDAGLegalize::ExpandConcatVectors(SDNode *Node) {
     unsigned NumSubElem = VectorValueType.getVectorNumElements();
     for (unsigned Idx = 0; Idx < NumSubElem; ++Idx) {
       Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ElementValueType,
-                                SubOp, DAG.getConstant(Idx, DL, VectorIdxType)));
+                                SubOp,
+                                DAG.getConstant(Idx, DL, VectorIdxType)));
     }
   }
   return DAG.getBuildVector(Node->getValueType(0), DL, Ops);

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https://github.com/llvm/llvm-project/pull/120030