[RISCV] Pass SDValue by value. NFC

Author: topperc

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

@@ -10718,7 +10718,7 @@ static SDValue lowerCttzElts(SDNode *N, SelectionDAG &DAG,
   return DAG.getSelect(DL, XLenVT, Setcc, VL, Res);
 }
 
-static inline void promoteVCIXScalar(const SDValue &Op,
+static inline void promoteVCIXScalar(SDValue Op,
                                      SmallVectorImpl<SDValue> &Operands,
                                      SelectionDAG &DAG) {
   const RISCVSubtarget &Subtarget =
@@ -10754,7 +10754,7 @@ static inline void promoteVCIXScalar(const SDValue &Op,
   }
 }
 
-static void processVCIXOperands(SDValue &OrigOp,
+static void processVCIXOperands(SDValue OrigOp,
                                 SmallVectorImpl<SDValue> &Operands,
                                 SelectionDAG &DAG) {
   promoteVCIXScalar(OrigOp, Operands, DAG);
@@ -11017,7 +11017,7 @@ SDValue RISCVTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
   return lowerVectorIntrinsicScalars(Op, DAG, Subtarget);
 }
 
-static inline SDValue getVCIXISDNodeWCHAIN(SDValue &Op, SelectionDAG &DAG,
+static inline SDValue getVCIXISDNodeWCHAIN(SDValue Op, SelectionDAG &DAG,
                                            unsigned Type) {
   SDLoc DL(Op);
   SmallVector<SDValue> Operands{Op->op_values()};
@@ -11054,7 +11054,7 @@ static inline SDValue getVCIXISDNodeWCHAIN(SDValue &Op, SelectionDAG &DAG,
   return NewNode;
 }
 
-static inline SDValue getVCIXISDNodeVOID(SDValue &Op, SelectionDAG &DAG,
+static inline SDValue getVCIXISDNodeVOID(SDValue Op, SelectionDAG &DAG,
                                          unsigned Type) {
   SmallVector<SDValue> Operands{Op->op_values()};
   Operands.erase(Operands.begin() + 1);