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annotate lib/Target/Mips/MipsMachineFunction.h @ 147:c2174574ed3a

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LLVM 10
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 16:55:33 +0900
parents 803732b1fca8
children
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1 //===- MipsMachineFunctionInfo.h - Private data used for Mips ---*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // This file declares the Mips specific subclass of MachineFunctionInfo.
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10 //
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11 //===----------------------------------------------------------------------===//
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12
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13 #ifndef LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H
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14 #define LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H
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16 #include "Mips16HardFloatInfo.h"
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17 #include "llvm/CodeGen/MachineFunction.h"
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18 #include "llvm/CodeGen/MachineMemOperand.h"
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19 #include <map>
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20
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21 namespace llvm {
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22
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23 /// MipsFunctionInfo - This class is derived from MachineFunction private
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24 /// Mips target-specific information for each MachineFunction.
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25 class MipsFunctionInfo : public MachineFunctionInfo {
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26 public:
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27 MipsFunctionInfo(MachineFunction &MF) : MF(MF) {}
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29 ~MipsFunctionInfo() override;
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31 unsigned getSRetReturnReg() const { return SRetReturnReg; }
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32 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
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33
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34 bool globalBaseRegSet() const;
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35 Register getGlobalBaseReg();
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36 Register getGlobalBaseRegForGlobalISel();
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37
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38 // Insert instructions to initialize the global base register in the
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39 // first MBB of the function.
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40 void initGlobalBaseReg();
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41
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42 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
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43 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
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44
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45 bool hasByvalArg() const { return HasByvalArg; }
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46 void setFormalArgInfo(unsigned Size, bool HasByval) {
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47 IncomingArgSize = Size;
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48 HasByvalArg = HasByval;
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49 }
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51 unsigned getIncomingArgSize() const { return IncomingArgSize; }
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52
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53 bool callsEhReturn() const { return CallsEhReturn; }
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54 void setCallsEhReturn() { CallsEhReturn = true; }
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55
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56 void createEhDataRegsFI();
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57 int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; }
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58 bool isEhDataRegFI(int FI) const;
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60 /// Create a MachinePointerInfo that has an ExternalSymbolPseudoSourceValue
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61 /// object representing a GOT entry for an external function.
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62 MachinePointerInfo callPtrInfo(const char *ES);
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64 // Functions with the "interrupt" attribute require special prologues,
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65 // epilogues and additional spill slots.
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66 bool isISR() const { return IsISR; }
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67 void setISR() { IsISR = true; }
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68 void createISRRegFI();
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69 int getISRRegFI(unsigned Reg) const { return ISRDataRegFI[Reg]; }
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70 bool isISRRegFI(int FI) const;
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71
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72 /// Create a MachinePointerInfo that has a GlobalValuePseudoSourceValue object
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73 /// representing a GOT entry for a global function.
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74 MachinePointerInfo callPtrInfo(const GlobalValue *GV);
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76 void setSaveS2() { SaveS2 = true; }
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77 bool hasSaveS2() const { return SaveS2; }
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78
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79 int getMoveF64ViaSpillFI(const TargetRegisterClass *RC);
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81 std::map<const char *, const Mips16HardFloatInfo::FuncSignature *>
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82 StubsNeeded;
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83
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84 private:
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85 virtual void anchor();
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86
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87 MachineFunction& MF;
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88
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89 /// SRetReturnReg - Some subtargets require that sret lowering includes
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90 /// returning the value of the returned struct in a register. This field
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91 /// holds the virtual register into which the sret argument is passed.
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92 unsigned SRetReturnReg = 0;
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93
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94 /// GlobalBaseReg - keeps track of the virtual register initialized for
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95 /// use as the global base register. This is used for PIC in some PIC
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96 /// relocation models.
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97 unsigned GlobalBaseReg = 0;
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98
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99 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
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100 int VarArgsFrameIndex = 0;
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101
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102 /// True if function has a byval argument.
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103 bool HasByvalArg;
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104
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105 /// Size of incoming argument area.
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106 unsigned IncomingArgSize;
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107
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108 /// CallsEhReturn - Whether the function calls llvm.eh.return.
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109 bool CallsEhReturn = false;
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110
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111 /// Frame objects for spilling eh data registers.
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112 int EhDataRegFI[4];
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113
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114 /// ISR - Whether the function is an Interrupt Service Routine.
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115 bool IsISR = false;
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116
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117 /// Frame objects for spilling C0_STATUS, C0_EPC
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118 int ISRDataRegFI[2];
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119
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120 // saveS2
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121 bool SaveS2 = false;
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123 /// FrameIndex for expanding BuildPairF64 nodes to spill and reload when the
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124 /// O32 FPXX ABI is enabled. -1 is used to denote invalid index.
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125 int MoveF64ViaSpillFI = -1;
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126 };
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127
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128 } // end namespace llvm
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130 #endif // LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H