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//===---- Mips16ISelDAGToDAG.h - A Dag to Dag Inst Selector for Mips ------===//
//                     The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// Subclass of MipsDAGToDAGISel specialized for mips16.


#include "MipsISelDAGToDAG.h"

namespace llvm {

class Mips16DAGToDAGISel : public MipsDAGToDAGISel {
  explicit Mips16DAGToDAGISel(MipsTargetMachine &TM, CodeGenOpt::Level OL)
      : MipsDAGToDAGISel(TM, OL) {}

  std::pair<SDNode *, SDNode *> selectMULT(SDNode *N, unsigned Opc,
                                           const SDLoc &DL, EVT Ty, bool HasLo,
                                           bool HasHi);

  bool runOnMachineFunction(MachineFunction &MF) override;

  bool selectAddr(bool SPAllowed, SDValue Addr, SDValue &Base,
                  SDValue &Offset);
  bool selectAddr16(SDValue Addr, SDValue &Base,
                    SDValue &Offset) override;
  bool selectAddr16SP(SDValue Addr, SDValue &Base,
                      SDValue &Offset) override;

  bool trySelect(SDNode *Node) override;

  void processFunctionAfterISel(MachineFunction &MF) override;

  // Insert instructions to initialize the global base register in the
  // first MBB of the function.
  void initGlobalBaseReg(MachineFunction &MF);

  void initMips16SPAliasReg(MachineFunction &MF);

FunctionPass *createMips16ISelDag(MipsTargetMachine &TM,
                                  CodeGenOpt::Level OptLevel);