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annotate lib/Target/Mips/MipsISelDAGToDAG.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 1172e4bd9c6f
children c2174574ed3a
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1 //===---- MipsISelDAGToDAG.h - A Dag to Dag Inst Selector for Mips --------===//
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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 defines an instruction selector for the MIPS target.
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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_MIPSISELDAGTODAG_H
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15 #define LLVM_LIB_TARGET_MIPS_MIPSISELDAGTODAG_H
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16
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17 #include "Mips.h"
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18 #include "MipsSubtarget.h"
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19 #include "MipsTargetMachine.h"
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20 #include "llvm/CodeGen/SelectionDAGISel.h"
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21
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22 //===----------------------------------------------------------------------===//
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23 // Instruction Selector Implementation
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24 //===----------------------------------------------------------------------===//
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25
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26 //===----------------------------------------------------------------------===//
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27 // MipsDAGToDAGISel - MIPS specific code to select MIPS machine
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28 // instructions for SelectionDAG operations.
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29 //===----------------------------------------------------------------------===//
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30 namespace llvm {
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31
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32 class MipsDAGToDAGISel : public SelectionDAGISel {
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33 public:
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34 explicit MipsDAGToDAGISel(MipsTargetMachine &TM, CodeGenOpt::Level OL)
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35 : SelectionDAGISel(TM, OL), Subtarget(nullptr) {}
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36
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37 // Pass Name
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38 StringRef getPassName() const override {
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39 return "MIPS DAG->DAG Pattern Instruction Selection";
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40 }
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41
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42 bool runOnMachineFunction(MachineFunction &MF) override;
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43
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44 protected:
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45 SDNode *getGlobalBaseReg();
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46
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47 /// Keep a pointer to the MipsSubtarget around so that we can make the right
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48 /// decision when generating code for different targets.
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49 const MipsSubtarget *Subtarget;
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50
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51 private:
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52 // Include the pieces autogenerated from the target description.
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53 #include "MipsGenDAGISel.inc"
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54
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55 // Complex Pattern.
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56 /// (reg + imm).
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57 virtual bool selectAddrRegImm(SDValue Addr, SDValue &Base,
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58 SDValue &Offset) const;
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59
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60 /// Fall back on this function if all else fails.
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61 virtual bool selectAddrDefault(SDValue Addr, SDValue &Base,
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62 SDValue &Offset) const;
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63
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64 /// Match integer address pattern.
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65 virtual bool selectIntAddr(SDValue Addr, SDValue &Base,
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66 SDValue &Offset) const;
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67
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68 virtual bool selectIntAddr11MM(SDValue Addr, SDValue &Base,
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69 SDValue &Offset) const;
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70
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71 virtual bool selectIntAddr12MM(SDValue Addr, SDValue &Base,
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72 SDValue &Offset) const;
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73
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74 virtual bool selectIntAddr16MM(SDValue Addr, SDValue &Base,
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75 SDValue &Offset) const;
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76
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77 virtual bool selectIntAddrLSL2MM(SDValue Addr, SDValue &Base,
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78 SDValue &Offset) const;
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79
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80 /// Match addr+simm10 and addr
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81 virtual bool selectIntAddrSImm10(SDValue Addr, SDValue &Base,
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82 SDValue &Offset) const;
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83
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84 virtual bool selectIntAddrSImm10Lsl1(SDValue Addr, SDValue &Base,
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85 SDValue &Offset) const;
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86
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87 virtual bool selectIntAddrSImm10Lsl2(SDValue Addr, SDValue &Base,
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88 SDValue &Offset) const;
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89
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90 virtual bool selectIntAddrSImm10Lsl3(SDValue Addr, SDValue &Base,
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91 SDValue &Offset) const;
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92
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93 virtual bool selectAddr16(SDValue Addr, SDValue &Base, SDValue &Offset);
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94 virtual bool selectAddr16SP(SDValue Addr, SDValue &Base, SDValue &Offset);
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96 /// \brief Select constant vector splats.
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97 virtual bool selectVSplat(SDNode *N, APInt &Imm,
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98 unsigned MinSizeInBits) const;
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99 /// \brief Select constant vector splats whose value fits in a uimm1.
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100 virtual bool selectVSplatUimm1(SDValue N, SDValue &Imm) const;
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101 /// \brief Select constant vector splats whose value fits in a uimm2.
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102 virtual bool selectVSplatUimm2(SDValue N, SDValue &Imm) const;
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103 /// \brief Select constant vector splats whose value fits in a uimm3.
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104 virtual bool selectVSplatUimm3(SDValue N, SDValue &Imm) const;
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105 /// \brief Select constant vector splats whose value fits in a uimm4.
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106 virtual bool selectVSplatUimm4(SDValue N, SDValue &Imm) const;
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107 /// \brief Select constant vector splats whose value fits in a uimm5.
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108 virtual bool selectVSplatUimm5(SDValue N, SDValue &Imm) const;
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109 /// \brief Select constant vector splats whose value fits in a uimm6.
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110 virtual bool selectVSplatUimm6(SDValue N, SDValue &Imm) const;
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111 /// \brief Select constant vector splats whose value fits in a uimm8.
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112 virtual bool selectVSplatUimm8(SDValue N, SDValue &Imm) const;
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113 /// \brief Select constant vector splats whose value fits in a simm5.
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114 virtual bool selectVSplatSimm5(SDValue N, SDValue &Imm) const;
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115 /// \brief Select constant vector splats whose value is a power of 2.
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116 virtual bool selectVSplatUimmPow2(SDValue N, SDValue &Imm) const;
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117 /// \brief Select constant vector splats whose value is the inverse of a
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118 /// power of 2.
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119 virtual bool selectVSplatUimmInvPow2(SDValue N, SDValue &Imm) const;
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120 /// \brief Select constant vector splats whose value is a run of set bits
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121 /// ending at the most significant bit
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122 virtual bool selectVSplatMaskL(SDValue N, SDValue &Imm) const;
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123 /// \brief Select constant vector splats whose value is a run of set bits
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124 /// starting at bit zero.
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125 virtual bool selectVSplatMaskR(SDValue N, SDValue &Imm) const;
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126
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127 void Select(SDNode *N) override;
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128
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129 virtual bool trySelect(SDNode *Node) = 0;
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130
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131 // getImm - Return a target constant with the specified value.
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132 inline SDValue getImm(const SDNode *Node, uint64_t Imm) {
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133 return CurDAG->getTargetConstant(Imm, SDLoc(Node), Node->getValueType(0));
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134 }
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135
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136 virtual void processFunctionAfterISel(MachineFunction &MF) = 0;
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137
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138 bool SelectInlineAsmMemoryOperand(const SDValue &Op,
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139 unsigned ConstraintID,
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140 std::vector<SDValue> &OutOps) override;
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141 };
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142 }
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143
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144 #endif