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annotate lib/Target/Mips/MipsMachineFunction.h @ 131:f476a9ba4795

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http://llvm.org/svn/llvm-project/compiler-rt/trunk compiler-rt
author mir3636
date Fri, 16 Feb 2018 21:02:11 +0900
parents 803732b1fca8
children c2174574ed3a
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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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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/CodeGen/MachineFunction.h"
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19 #include "llvm/CodeGen/MachineMemOperand.h"
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20 #include <map>
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22 namespace llvm {
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23
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24 /// MipsFunctionInfo - This class is derived from MachineFunction private
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25 /// Mips target-specific information for each MachineFunction.
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26 class MipsFunctionInfo : public MachineFunctionInfo {
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27 public:
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28 MipsFunctionInfo(MachineFunction &MF) : MF(MF) {}
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30 ~MipsFunctionInfo() override;
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32 unsigned getSRetReturnReg() const { return SRetReturnReg; }
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33 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
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34
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35 bool globalBaseRegSet() const;
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36 unsigned getGlobalBaseReg();
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37
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38 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
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39 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
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40
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41 bool hasByvalArg() const { return HasByvalArg; }
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42 void setFormalArgInfo(unsigned Size, bool HasByval) {
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43 IncomingArgSize = Size;
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44 HasByvalArg = HasByval;
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45 }
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47 unsigned getIncomingArgSize() const { return IncomingArgSize; }
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48
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49 bool callsEhReturn() const { return CallsEhReturn; }
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50 void setCallsEhReturn() { CallsEhReturn = true; }
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51
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52 void createEhDataRegsFI();
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53 int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; }
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54 bool isEhDataRegFI(int FI) const;
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55
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56 /// Create a MachinePointerInfo that has an ExternalSymbolPseudoSourceValue
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57 /// object representing a GOT entry for an external function.
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58 MachinePointerInfo callPtrInfo(const char *ES);
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60 // Functions with the "interrupt" attribute require special prologues,
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61 // epilogues and additional spill slots.
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62 bool isISR() const { return IsISR; }
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63 void setISR() { IsISR = true; }
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64 void createISRRegFI();
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65 int getISRRegFI(unsigned Reg) const { return ISRDataRegFI[Reg]; }
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66 bool isISRRegFI(int FI) const;
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67
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68 /// Create a MachinePointerInfo that has a GlobalValuePseudoSourceValue object
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69 /// representing a GOT entry for a global function.
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70 MachinePointerInfo callPtrInfo(const GlobalValue *GV);
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72 void setSaveS2() { SaveS2 = true; }
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73 bool hasSaveS2() const { return SaveS2; }
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74
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75 int getMoveF64ViaSpillFI(const TargetRegisterClass *RC);
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77 std::map<const char *, const Mips16HardFloatInfo::FuncSignature *>
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78 StubsNeeded;
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79
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80 private:
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81 virtual void anchor();
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82
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83 MachineFunction& MF;
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84
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85 /// SRetReturnReg - Some subtargets require that sret lowering includes
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86 /// returning the value of the returned struct in a register. This field
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87 /// holds the virtual register into which the sret argument is passed.
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88 unsigned SRetReturnReg = 0;
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90 /// GlobalBaseReg - keeps track of the virtual register initialized for
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91 /// use as the global base register. This is used for PIC in some PIC
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92 /// relocation models.
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93 unsigned GlobalBaseReg = 0;
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94
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95 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
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96 int VarArgsFrameIndex = 0;
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98 /// True if function has a byval argument.
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99 bool HasByvalArg;
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100
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101 /// Size of incoming argument area.
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102 unsigned IncomingArgSize;
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103
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104 /// CallsEhReturn - Whether the function calls llvm.eh.return.
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105 bool CallsEhReturn = false;
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106
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107 /// Frame objects for spilling eh data registers.
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108 int EhDataRegFI[4];
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109
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110 /// ISR - Whether the function is an Interrupt Service Routine.
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111 bool IsISR = false;
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112
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113 /// Frame objects for spilling C0_STATUS, C0_EPC
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114 int ISRDataRegFI[2];
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115
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116 // saveS2
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117 bool SaveS2 = false;
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118
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119 /// FrameIndex for expanding BuildPairF64 nodes to spill and reload when the
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120 /// O32 FPXX ABI is enabled. -1 is used to denote invalid index.
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121 int MoveF64ViaSpillFI = -1;
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122 };
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124 } // end namespace llvm
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126 #endif // LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H