HexagonMachineFunctionInfo.h revision 5a364c5561ec04e33a6f5d52c14f1bac6f247ea0 
1//=- HexagonMachineFunctionInfo.h - Hexagon machine function info -*- C++ -*-=//
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#ifndef HexagonMACHINEFUNCTIONINFO_H
11#define HexagonMACHINEFUNCTIONINFO_H
12
13#include <map>
14#include "llvm/CodeGen/MachineFunction.h"
15
16namespace llvm {
17
18  namespace Hexagon {
19    const unsigned int StartPacket = 0x1;
20    const unsigned int EndPacket = 0x2;
21  }
22
23
24/// Hexagon target-specific information for each MachineFunction.
25class HexagonMachineFunctionInfo : public MachineFunctionInfo {
26  // SRetReturnReg - Some subtargets require that sret lowering includes
27  // returning the value of the returned struct in a register. This field
28  // holds the virtual register into which the sret argument is passed.
29  unsigned SRetReturnReg;
30  std::vector<MachineInstr*> AllocaAdjustInsts;
31  int VarArgsFrameIndex;
32  bool HasClobberLR;
33  bool HasEHReturn;
34
35  std::map<const MachineInstr*, unsigned> PacketInfo;
36
37  virtual void anchor();
38
39public:
40  HexagonMachineFunctionInfo() : SRetReturnReg(0), HasClobberLR(0),
41    HasEHReturn(false) {}
42
43  HexagonMachineFunctionInfo(MachineFunction &MF) : SRetReturnReg(0),
44                                                    HasClobberLR(0),
45                                                    HasEHReturn(false) {}
46
47  unsigned getSRetReturnReg() const { return SRetReturnReg; }
48  void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
49
50  void addAllocaAdjustInst(MachineInstr* MI) {
51    AllocaAdjustInsts.push_back(MI);
52  }
53  const std::vector<MachineInstr*>& getAllocaAdjustInsts() {
54    return AllocaAdjustInsts;
55  }
56
57  void setVarArgsFrameIndex(int v) { VarArgsFrameIndex = v; }
58  int getVarArgsFrameIndex() { return VarArgsFrameIndex; }
59
60  void setStartPacket(MachineInstr* MI) {
61    PacketInfo[MI] |= Hexagon::StartPacket;
62  }
63  void setEndPacket(MachineInstr* MI)   {
64    PacketInfo[MI] |= Hexagon::EndPacket;
65  }
66  bool isStartPacket(const MachineInstr* MI) const {
67    return (PacketInfo.count(MI) &&
68            (PacketInfo.find(MI)->second & Hexagon::StartPacket));
69  }
70  bool isEndPacket(const MachineInstr* MI) const {
71    return (PacketInfo.count(MI) &&
72            (PacketInfo.find(MI)->second & Hexagon::EndPacket));
73  }
74  void setHasClobberLR(bool v) { HasClobberLR = v;  }
75  bool hasClobberLR() const { return HasClobberLR; }
76
77  bool hasEHReturn() const { return HasEHReturn; };
78  void setHasEHReturn(bool H = true) { HasEHReturn = H; };
79};
80} // End llvm namespace
81
82#endif
83