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annotate lib/Target/ARM/ARMAsmPrinter.h @ 33:e4204d083e25 LLVM3.5

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LLVM 3.5
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 14:32:10 +0900
parents 95c75e76d11b
children 54457678186b
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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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9
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10 #ifndef ARMASMPRINTER_H
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11 #define ARMASMPRINTER_H
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12
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13 #include "ARM.h"
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14 #include "ARMTargetMachine.h"
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15 #include "llvm/CodeGen/AsmPrinter.h"
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16 #include "llvm/Support/Compiler.h"
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17
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18 namespace llvm {
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19
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20 class MCOperand;
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21
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22 namespace ARM {
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23 enum DW_ISA {
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24 DW_ISA_ARM_thumb = 1,
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25 DW_ISA_ARM_arm = 2
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26 };
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27 }
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28
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29 class LLVM_LIBRARY_VISIBILITY ARMAsmPrinter : public AsmPrinter {
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30
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31 /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
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32 /// make the right decision when printing asm code for different targets.
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33 const ARMSubtarget *Subtarget;
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34
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35 /// AFI - Keep a pointer to ARMFunctionInfo for the current
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36 /// MachineFunction.
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37 ARMFunctionInfo *AFI;
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38
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39 /// MCP - Keep a pointer to constantpool entries of the current
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40 /// MachineFunction.
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41 const MachineConstantPool *MCP;
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42
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43 /// InConstantPool - Maintain state when emitting a sequence of constant
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44 /// pool entries so we can properly mark them as data regions.
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45 bool InConstantPool;
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46 public:
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47 explicit ARMAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
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48 : AsmPrinter(TM, Streamer), AFI(NULL), MCP(NULL), InConstantPool(false) {
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49 Subtarget = &TM.getSubtarget<ARMSubtarget>();
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50 }
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51
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52 virtual const char *getPassName() const LLVM_OVERRIDE {
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53 return "ARM Assembly / Object Emitter";
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54 }
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55
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56 void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O,
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57 const char *Modifier = 0);
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58
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59 virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
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60 unsigned AsmVariant, const char *ExtraCode,
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61 raw_ostream &O) LLVM_OVERRIDE;
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62 virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
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63 unsigned AsmVariant, const char *ExtraCode,
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64 raw_ostream &O) LLVM_OVERRIDE;
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65
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66 void EmitJumpTable(const MachineInstr *MI);
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67 void EmitJump2Table(const MachineInstr *MI);
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68 virtual void EmitInstruction(const MachineInstr *MI) LLVM_OVERRIDE;
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69 virtual bool runOnMachineFunction(MachineFunction &F) LLVM_OVERRIDE;
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70
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71 virtual void EmitConstantPool() LLVM_OVERRIDE {
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72 // we emit constant pools customly!
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73 }
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74 virtual void EmitFunctionBodyEnd() LLVM_OVERRIDE;
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75 virtual void EmitFunctionEntryLabel() LLVM_OVERRIDE;
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76 virtual void EmitStartOfAsmFile(Module &M) LLVM_OVERRIDE;
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77 virtual void EmitEndOfAsmFile(Module &M) LLVM_OVERRIDE;
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78 virtual void EmitXXStructor(const Constant *CV) LLVM_OVERRIDE;
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79
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80 // lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
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81 bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
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82
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83 private:
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84 // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile()
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85 void emitAttributes();
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86
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87 // Helper for ELF .o only
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88 void emitARMAttributeSection();
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89
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90 // Generic helper used to emit e.g. ARMv5 mul pseudos
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91 void EmitPatchedInstruction(const MachineInstr *MI, unsigned TargetOpc);
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92
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93 void EmitUnwindingInstruction(const MachineInstr *MI);
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94
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95 // emitPseudoExpansionLowering - tblgen'erated.
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96 bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
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97 const MachineInstr *MI);
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98
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99 public:
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100 /// EmitDwarfRegOp - Emit dwarf register operation.
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101 virtual void EmitDwarfRegOp(const MachineLocation &MLoc, bool Indirect) const
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102 LLVM_OVERRIDE;
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103
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104 virtual unsigned getISAEncoding() LLVM_OVERRIDE {
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105 // ARM/Darwin adds ISA to the DWARF info for each function.
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106 if (!Subtarget->isTargetDarwin())
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107 return 0;
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108 return Subtarget->isThumb() ?
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109 ARM::DW_ISA_ARM_thumb : ARM::DW_ISA_ARM_arm;
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110 }
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111
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112 private:
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113 MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol);
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114 MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const;
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115
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116 MCSymbol *GetARMSJLJEHLabel() const;
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117
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118 MCSymbol *GetARMGVSymbol(const GlobalValue *GV, unsigned char TargetFlags);
0
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119
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120 public:
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121 /// EmitMachineConstantPoolValue - Print a machine constantpool value to
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122 /// the .s file.
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123 virtual void
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124 EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) LLVM_OVERRIDE;
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125 };
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126 } // end namespace llvm
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127
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128 #endif