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annotate lib/Target/ARM/ARMAsmPrinter.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 e4204d083e25
children 60c9769439b8
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1 //===-- ARMAsmPrinter.h - ARM implementation of AsmPrinter ------*- 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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10 #ifndef LLVM_LIB_TARGET_ARM_ARMASMPRINTER_H
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11 #define LLVM_LIB_TARGET_ARM_ARMASMPRINTER_H
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13 #include "ARMSubtarget.h"
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14 #include "llvm/CodeGen/AsmPrinter.h"
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15 #include "llvm/Target/TargetMachine.h"
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16
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17 namespace llvm {
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19 class ARMFunctionInfo;
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20 class MCOperand;
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21 class MachineConstantPool;
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22 class MachineOperand;
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23
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24 namespace ARM {
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25 enum DW_ISA {
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26 DW_ISA_ARM_thumb = 1,
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27 DW_ISA_ARM_arm = 2
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28 };
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29 }
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30
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31 class LLVM_LIBRARY_VISIBILITY ARMAsmPrinter : public AsmPrinter {
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32
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33 /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
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34 /// make the right decision when printing asm code for different targets.
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35 const ARMSubtarget *Subtarget;
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36
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37 /// AFI - Keep a pointer to ARMFunctionInfo for the current
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38 /// MachineFunction.
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39 ARMFunctionInfo *AFI;
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40
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41 /// MCP - Keep a pointer to constantpool entries of the current
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42 /// MachineFunction.
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43 const MachineConstantPool *MCP;
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44
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45 /// InConstantPool - Maintain state when emitting a sequence of constant
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46 /// pool entries so we can properly mark them as data regions.
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47 bool InConstantPool;
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48 public:
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49 explicit ARMAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
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50 : AsmPrinter(TM, Streamer), AFI(nullptr), MCP(nullptr),
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51 InConstantPool(false) {
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52 Subtarget = &TM.getSubtarget<ARMSubtarget>();
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53 }
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54
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55 const char *getPassName() const override {
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56 return "ARM Assembly / Object Emitter";
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57 }
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58
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59 void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O,
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60 const char *Modifier = nullptr);
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61
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62 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
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63 unsigned AsmVariant, const char *ExtraCode,
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64 raw_ostream &O) override;
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65 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
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66 unsigned AsmVariant, const char *ExtraCode,
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67 raw_ostream &O) override;
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68
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69 void emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
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70 const MCSubtargetInfo *EndInfo) const override;
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71
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72 void EmitJumpTable(const MachineInstr *MI);
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73 void EmitJump2Table(const MachineInstr *MI);
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74 void EmitInstruction(const MachineInstr *MI) override;
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75 bool runOnMachineFunction(MachineFunction &F) override;
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76
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77 void EmitConstantPool() override {
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78 // we emit constant pools customly!
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79 }
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80 void EmitFunctionBodyEnd() override;
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81 void EmitFunctionEntryLabel() override;
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82 void EmitStartOfAsmFile(Module &M) override;
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83 void EmitEndOfAsmFile(Module &M) override;
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84 void EmitXXStructor(const Constant *CV) override;
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85
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86 // lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
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87 bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
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88
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89 private:
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90 // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile()
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91 void emitAttributes();
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92
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93 // Generic helper used to emit e.g. ARMv5 mul pseudos
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94 void EmitPatchedInstruction(const MachineInstr *MI, unsigned TargetOpc);
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95
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96 void EmitUnwindingInstruction(const MachineInstr *MI);
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97
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98 // emitPseudoExpansionLowering - tblgen'erated.
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99 bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
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100 const MachineInstr *MI);
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101
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102 public:
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103 unsigned getISAEncoding() override {
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104 // ARM/Darwin adds ISA to the DWARF info for each function.
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105 if (!Subtarget->isTargetMachO())
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106 return 0;
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107 return Subtarget->isThumb() ?
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108 ARM::DW_ISA_ARM_thumb : ARM::DW_ISA_ARM_arm;
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109 }
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110
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111 private:
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112 MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol);
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113 MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const;
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114
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115 MCSymbol *GetARMSJLJEHLabel() const;
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116
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117 MCSymbol *GetARMGVSymbol(const GlobalValue *GV, unsigned char TargetFlags);
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118
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119 public:
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120 /// EmitMachineConstantPoolValue - Print a machine constantpool value to
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121 /// the .s file.
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122 void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) override;
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123 };
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124 } // end namespace llvm
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125
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126 #endif