[RISCV] Use MutableArrayRef instead of SmallVectorImpl& where wew change the contents of the vector but not its size.

Author: topperc

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

@@ -10719,7 +10719,7 @@ static SDValue lowerCttzElts(SDNode *N, SelectionDAG &DAG,
 }
 
 static inline void promoteVCIXScalar(const SDValue &Op,
-                                     SmallVectorImpl<SDValue> &Operands,
+                                     MutableArrayRef<SDValue> Operands,
                                      SelectionDAG &DAG) {
   const RISCVSubtarget &Subtarget =
       DAG.getMachineFunction().getSubtarget<RISCVSubtarget>();
@@ -10755,7 +10755,7 @@ static inline void promoteVCIXScalar(const SDValue &Op,
 }
 
 static void processVCIXOperands(SDValue &OrigOp,
-                                SmallVectorImpl<SDValue> &Operands,
+                                MutableArrayRef<SDValue> Operands,
                                 SelectionDAG &DAG) {
   promoteVCIXScalar(OrigOp, Operands, DAG);
   const RISCVSubtarget &Subtarget =