ARMAsmPrinter.h revision 234353
1//===-- ARMAsmPrinter.h - Print machine code to an ARM .s file --*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// ARM Assembly printer class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef ARMASMPRINTER_H
15#define ARMASMPRINTER_H
16
17#include "ARM.h"
18#include "ARMTargetMachine.h"
19#include "llvm/CodeGen/AsmPrinter.h"
20#include "llvm/Support/Compiler.h"
21
22namespace llvm {
23
24class MCOperand;
25
26namespace ARM {
27  enum DW_ISA {
28    DW_ISA_ARM_thumb = 1,
29    DW_ISA_ARM_arm = 2
30  };
31}
32
33class LLVM_LIBRARY_VISIBILITY ARMAsmPrinter : public AsmPrinter {
34
35  /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
36  /// make the right decision when printing asm code for different targets.
37  const ARMSubtarget *Subtarget;
38
39  /// AFI - Keep a pointer to ARMFunctionInfo for the current
40  /// MachineFunction.
41  ARMFunctionInfo *AFI;
42
43  /// MCP - Keep a pointer to constantpool entries of the current
44  /// MachineFunction.
45  const MachineConstantPool *MCP;
46
47public:
48  explicit ARMAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
49    : AsmPrinter(TM, Streamer), AFI(NULL), MCP(NULL) {
50      Subtarget = &TM.getSubtarget<ARMSubtarget>();
51    }
52
53  virtual const char *getPassName() const {
54    return "ARM Assembly Printer";
55  }
56
57  void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O,
58                    const char *Modifier = 0);
59
60  virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
61                               unsigned AsmVariant, const char *ExtraCode,
62                               raw_ostream &O);
63  virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
64                                     unsigned AsmVariant,
65                                     const char *ExtraCode, raw_ostream &O);
66
67  void EmitJumpTable(const MachineInstr *MI);
68  void EmitJump2Table(const MachineInstr *MI);
69  virtual void EmitInstruction(const MachineInstr *MI);
70  bool runOnMachineFunction(MachineFunction &F);
71
72  virtual void EmitConstantPool() {} // we emit constant pools customly!
73  virtual void EmitFunctionEntryLabel();
74  void EmitStartOfAsmFile(Module &M);
75  void EmitEndOfAsmFile(Module &M);
76  void EmitXXStructor(const Constant *CV);
77
78  // lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
79  bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
80
81private:
82  // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile()
83  void emitAttributes();
84
85  // Helper for ELF .o only
86  void emitARMAttributeSection();
87
88  // Generic helper used to emit e.g. ARMv5 mul pseudos
89  void EmitPatchedInstruction(const MachineInstr *MI, unsigned TargetOpc);
90
91  void EmitUnwindingInstruction(const MachineInstr *MI);
92
93  // emitPseudoExpansionLowering - tblgen'erated.
94  bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
95                                   const MachineInstr *MI);
96
97public:
98  void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
99
100  MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
101
102  /// EmitDwarfRegOp - Emit dwarf register operation.
103  virtual void EmitDwarfRegOp(const MachineLocation &MLoc) const;
104
105  virtual unsigned getISAEncoding() {
106    // ARM/Darwin adds ISA to the DWARF info for each function.
107    if (!Subtarget->isTargetDarwin())
108      return 0;
109    return Subtarget->isThumb() ?
110      ARM::DW_ISA_ARM_thumb : ARM::DW_ISA_ARM_arm;
111  }
112
113  MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol);
114  MCSymbol *GetARMSetPICJumpTableLabel2(unsigned uid, unsigned uid2,
115                                        const MachineBasicBlock *MBB) const;
116  MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const;
117
118  MCSymbol *GetARMSJLJEHLabel(void) const;
119
120  MCSymbol *GetARMGVSymbol(const GlobalValue *GV);
121
122  /// EmitMachineConstantPoolValue - Print a machine constantpool value to
123  /// the .s file.
124  virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
125};
126} // end namespace llvm
127
128#endif
129