Mips16ISelDAGToDAG.h revision a430cb613b6e93c05f128b04323c57acfd08686d 
1//===---- Mips16ISelDAGToDAG.h - A Dag to Dag Inst Selector for Mips ------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// Subclass of MipsDAGToDAGISel specialized for mips16.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef MIPS16ISELDAGTODAG_H
15#define MIPS16ISELDAGTODAG_H
16
17#include "MipsISelDAGToDAG.h"
18
19namespace llvm {
20
21class Mips16DAGToDAGISel : public MipsDAGToDAGISel {
22public:
23  explicit Mips16DAGToDAGISel(MipsTargetMachine &TM) : MipsDAGToDAGISel(TM) {}
24
25private:
26  std::pair<SDNode*, SDNode*> selectMULT(SDNode *N, unsigned Opc, DebugLoc DL,
27                                         EVT Ty, bool HasLo, bool HasHi);
28
29  SDValue getMips16SPAliasReg();
30
31  virtual bool runOnMachineFunction(MachineFunction &MF);
32
33  void getMips16SPRefReg(SDNode *Parent, SDValue &AliasReg);
34
35  virtual bool selectAddr16(SDNode *Parent, SDValue N, SDValue &Base,
36                            SDValue &Offset, SDValue &Alias);
37
38  virtual std::pair<bool, SDNode*> selectNode(SDNode *Node);
39
40  virtual void processFunctionAfterISel(MachineFunction &MF);
41
42  // Insert instructions to initialize the global base register in the
43  // first MBB of the function.
44  void initGlobalBaseReg(MachineFunction &MF);
45
46  void initMips16SPAliasReg(MachineFunction &MF);
47};
48
49FunctionPass *createMips16ISelDag(MipsTargetMachine &TM);
50
51}
52
53#endif
54