R600ISelLowering.h: Silence a warning. [-Warray-parameter]

FIXME: Could it be rewritten with llvm::ArrayRef ?

Author: chapuni

llvm/lib/Target/AMDGPU/R600ISelLowering.h

@@ -74,7 +74,7 @@ class R600TargetLowering final : public AMDGPUTargetLowering {
 
   void lowerImplicitParameter(MachineInstr *MI, MachineBasicBlock &BB,
       MachineRegisterInfo & MRI, unsigned dword_offset) const;
-  SDValue OptimizeSwizzle(SDValue BuildVector, SDValue Swz[4],
+  SDValue OptimizeSwizzle(SDValue BuildVector, SDValue Swz[],
                           SelectionDAG &DAG, const SDLoc &DL) const;
   SDValue vectorToVerticalVector(SelectionDAG &DAG, SDValue Vector) const;