annotate lib/Target/Mips/MipsISelDAGToDAG.h @ 0:95c75e76d11b LLVM3.4

LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children 54457678186b
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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 MIPSISELDAGTODAG_H
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15 #define 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)
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35 : SelectionDAGISel(TM), Subtarget(TM.getSubtarget<MipsSubtarget>()) {}
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36
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37 // Pass Name
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38 virtual const char *getPassName() const {
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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 virtual bool runOnMachineFunction(MachineFunction &MF);
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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 // Complex Pattern.
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61 /// (reg + reg).
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62 virtual bool selectAddrRegReg(SDValue Addr, SDValue &Base,
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63 SDValue &Offset) const;
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64
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65 /// Fall back on this function if all else fails.
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66 virtual bool selectAddrDefault(SDValue Addr, SDValue &Base,
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67 SDValue &Offset) const;
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68
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69 /// Match integer address pattern.
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70 virtual bool selectIntAddr(SDValue Addr, SDValue &Base,
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71 SDValue &Offset) const;
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72
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73 virtual bool selectIntAddrMM(SDValue Addr, SDValue &Base,
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74 SDValue &Offset) const;
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75
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76 virtual bool selectAddr16(SDNode *Parent, SDValue N, SDValue &Base,
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77 SDValue &Offset, SDValue &Alias);
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78
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79 /// \brief Select constant vector splats.
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80 virtual bool selectVSplat(SDNode *N, APInt &Imm) const;
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81 /// \brief Select constant vector splats whose value fits in a uimm1.
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82 virtual bool selectVSplatUimm1(SDValue N, SDValue &Imm) const;
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83 /// \brief Select constant vector splats whose value fits in a uimm2.
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84 virtual bool selectVSplatUimm2(SDValue N, SDValue &Imm) const;
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85 /// \brief Select constant vector splats whose value fits in a uimm3.
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86 virtual bool selectVSplatUimm3(SDValue N, SDValue &Imm) const;
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87 /// \brief Select constant vector splats whose value fits in a uimm4.
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88 virtual bool selectVSplatUimm4(SDValue N, SDValue &Imm) const;
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89 /// \brief Select constant vector splats whose value fits in a uimm5.
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90 virtual bool selectVSplatUimm5(SDValue N, SDValue &Imm) const;
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91 /// \brief Select constant vector splats whose value fits in a uimm6.
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92 virtual bool selectVSplatUimm6(SDValue N, SDValue &Imm) const;
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93 /// \brief Select constant vector splats whose value fits in a uimm8.
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94 virtual bool selectVSplatUimm8(SDValue N, SDValue &Imm) const;
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95 /// \brief Select constant vector splats whose value fits in a simm5.
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96 virtual bool selectVSplatSimm5(SDValue N, SDValue &Imm) const;
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97 /// \brief Select constant vector splats whose value is a power of 2.
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98 virtual bool selectVSplatUimmPow2(SDValue N, SDValue &Imm) const;
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99 /// \brief Select constant vector splats whose value is the inverse of a
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100 /// power of 2.
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101 virtual bool selectVSplatUimmInvPow2(SDValue N, SDValue &Imm) const;
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102 /// \brief Select constant vector splats whose value is a run of set bits
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103 /// ending at the most significant bit
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104 virtual bool selectVSplatMaskL(SDValue N, SDValue &Imm) const;
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105 /// \brief Select constant vector splats whose value is a run of set bits
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106 /// starting at bit zero.
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107 virtual bool selectVSplatMaskR(SDValue N, SDValue &Imm) const;
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108
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109 virtual SDNode *Select(SDNode *N);
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110
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111 virtual std::pair<bool, SDNode*> selectNode(SDNode *Node) = 0;
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112
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113 // getImm - Return a target constant with the specified value.
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114 inline SDValue getImm(const SDNode *Node, uint64_t Imm) {
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115 return CurDAG->getTargetConstant(Imm, Node->getValueType(0));
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116 }
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117
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118 virtual void processFunctionAfterISel(MachineFunction &MF) = 0;
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119
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120 virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
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121 char ConstraintCode,
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122 std::vector<SDValue> &OutOps);
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123 };
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124
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125 /// createMipsISelDag - This pass converts a legalized DAG into a
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126 /// MIPS-specific DAG, ready for instruction scheduling.
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127 FunctionPass *createMipsISelDag(MipsTargetMachine &TM);
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128
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
129 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
130
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
131 #endif