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annotate lib/Target/Mips/MipsMachineFunction.h @ 77:54457678186b LLVM3.6

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LLVM 3.6
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Mon, 08 Sep 2014 22:06:00 +0900
parents 95c75e76d11b
children afa8332a0e37
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1 //===-- MipsMachineFunctionInfo.h - Private data used for Mips ----*- C++ -*-=//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file declares the Mips specific subclass of MachineFunctionInfo.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #ifndef LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H
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15 #define LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H
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16
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17 #include "Mips16HardFloatInfo.h"
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18 #include "llvm/ADT/StringMap.h"
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19 #include "llvm/CodeGen/MachineFrameInfo.h"
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20 #include "llvm/CodeGen/MachineFunction.h"
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21 #include "llvm/CodeGen/MachineMemOperand.h"
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22 #include "llvm/CodeGen/PseudoSourceValue.h"
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23 #include "llvm/IR/GlobalValue.h"
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24 #include "llvm/IR/ValueMap.h"
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25 #include "llvm/Target/TargetFrameLowering.h"
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26 #include "llvm/Target/TargetMachine.h"
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27 #include <map>
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28 #include <string>
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29 #include <utility>
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30
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31 namespace llvm {
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32
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33 /// \brief A class derived from PseudoSourceValue that represents a GOT entry
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34 /// resolved by lazy-binding.
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35 class MipsCallEntry : public PseudoSourceValue {
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36 public:
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37 explicit MipsCallEntry(StringRef N);
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38 explicit MipsCallEntry(const GlobalValue *V);
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39 bool isConstant(const MachineFrameInfo *) const override;
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40 bool isAliased(const MachineFrameInfo *) const override;
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41 bool mayAlias(const MachineFrameInfo *) const override;
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42
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43 private:
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44 void printCustom(raw_ostream &O) const override;
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45 #ifndef NDEBUG
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46 std::string Name;
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47 const GlobalValue *Val;
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48 #endif
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49 };
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50
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51 /// MipsFunctionInfo - This class is derived from MachineFunction private
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52 /// Mips target-specific information for each MachineFunction.
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53 class MipsFunctionInfo : public MachineFunctionInfo {
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54 public:
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55 MipsFunctionInfo(MachineFunction &MF)
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56 : MF(MF), SRetReturnReg(0), GlobalBaseReg(0), Mips16SPAliasReg(0),
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57 VarArgsFrameIndex(0), CallsEhReturn(false), SaveS2(false),
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58 MoveF64ViaSpillFI(-1) {}
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59
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60 ~MipsFunctionInfo();
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61
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62 unsigned getSRetReturnReg() const { return SRetReturnReg; }
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63 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
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64
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65 bool globalBaseRegSet() const;
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66 unsigned getGlobalBaseReg();
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67
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68 bool mips16SPAliasRegSet() const;
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69 unsigned getMips16SPAliasReg();
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70
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71 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
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72 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
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73
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74 bool hasByvalArg() const { return HasByvalArg; }
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75 void setFormalArgInfo(unsigned Size, bool HasByval) {
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76 IncomingArgSize = Size;
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77 HasByvalArg = HasByval;
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78 }
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79
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80 unsigned getIncomingArgSize() const { return IncomingArgSize; }
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81
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82 bool callsEhReturn() const { return CallsEhReturn; }
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83 void setCallsEhReturn() { CallsEhReturn = true; }
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84
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85 void createEhDataRegsFI();
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86 int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; }
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87 bool isEhDataRegFI(int FI) const;
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88
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89 /// \brief Create a MachinePointerInfo that has a MipsCallEntr object
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90 /// representing a GOT entry for an external function.
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91 MachinePointerInfo callPtrInfo(StringRef Name);
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92
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93 /// \brief Create a MachinePointerInfo that has a MipsCallEntr object
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94 /// representing a GOT entry for a global function.
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95 MachinePointerInfo callPtrInfo(const GlobalValue *Val);
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96
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97 void setSaveS2() { SaveS2 = true; }
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98 bool hasSaveS2() const { return SaveS2; }
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99
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100 int getMoveF64ViaSpillFI(const TargetRegisterClass *RC);
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101
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102 std::map<const char *, const llvm::Mips16HardFloatInfo::FuncSignature *>
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103 StubsNeeded;
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104
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105 private:
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106 virtual void anchor();
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107
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108 MachineFunction& MF;
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109 /// SRetReturnReg - Some subtargets require that sret lowering includes
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110 /// returning the value of the returned struct in a register. This field
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111 /// holds the virtual register into which the sret argument is passed.
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112 unsigned SRetReturnReg;
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113
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114 /// GlobalBaseReg - keeps track of the virtual register initialized for
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115 /// use as the global base register. This is used for PIC in some PIC
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116 /// relocation models.
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117 unsigned GlobalBaseReg;
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118
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119 /// Mips16SPAliasReg - keeps track of the virtual register initialized for
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120 /// use as an alias for SP for use in load/store of halfword/byte from/to
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121 /// the stack
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122 unsigned Mips16SPAliasReg;
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123
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124 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
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125 int VarArgsFrameIndex;
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126
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127 /// True if function has a byval argument.
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128 bool HasByvalArg;
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129
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130 /// Size of incoming argument area.
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131 unsigned IncomingArgSize;
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132
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133 /// CallsEhReturn - Whether the function calls llvm.eh.return.
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134 bool CallsEhReturn;
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135
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136 /// Frame objects for spilling eh data registers.
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137 int EhDataRegFI[4];
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138
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139 // saveS2
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140 bool SaveS2;
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141
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142 /// FrameIndex for expanding BuildPairF64 nodes to spill and reload when the
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143 /// O32 FPXX ABI is enabled. -1 is used to denote invalid index.
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144 int MoveF64ViaSpillFI;
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145
0
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146 /// MipsCallEntry maps.
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147 StringMap<const MipsCallEntry *> ExternalCallEntries;
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148 ValueMap<const GlobalValue *, const MipsCallEntry *> GlobalCallEntries;
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149 };
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150
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151 } // end of namespace llvm
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152
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153 #endif