ARMAsmPrinter.h revision 218893 
1//===-- ARMAsmPrinter.h - Print machine code to an ARM .s file ------------===//
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
24namespace ARM {
25  enum DW_ISA {
26    DW_ISA_ARM_thumb = 1,
27    DW_ISA_ARM_arm = 2
28  };
29}
30
31class LLVM_LIBRARY_VISIBILITY ARMAsmPrinter : public AsmPrinter {
32
33  /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
34  /// make the right decision when printing asm code for different targets.
35  const ARMSubtarget *Subtarget;
36
37  /// AFI - Keep a pointer to ARMFunctionInfo for the current
38  /// MachineFunction.
39  ARMFunctionInfo *AFI;
40
41  /// MCP - Keep a pointer to constantpool entries of the current
42  /// MachineFunction.
43  const MachineConstantPool *MCP;
44
45public:
46  explicit ARMAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
47    : AsmPrinter(TM, Streamer), AFI(NULL), MCP(NULL) {
48      Subtarget = &TM.getSubtarget<ARMSubtarget>();
49    }
50
51  virtual const char *getPassName() const {
52    return "ARM Assembly Printer";
53  }
54
55  void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O,
56                    const char *Modifier = 0);
57
58  virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
59                               unsigned AsmVariant, const char *ExtraCode,
60                               raw_ostream &O);
61  virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
62                                     unsigned AsmVariant,
63                                     const char *ExtraCode, raw_ostream &O);
64
65  void EmitJumpTable(const MachineInstr *MI);
66  void EmitJump2Table(const MachineInstr *MI);
67  virtual void EmitInstruction(const MachineInstr *MI);
68  bool runOnMachineFunction(MachineFunction &F);
69
70  virtual void EmitConstantPool() {} // we emit constant pools customly!
71  virtual void EmitFunctionEntryLabel();
72  void EmitStartOfAsmFile(Module &M);
73  void EmitEndOfAsmFile(Module &M);
74
75private:
76  // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile()
77  void emitAttributes();
78
79  // Helper for ELF .o only
80  void emitARMAttributeSection();
81
82  // Generic helper used to emit e.g. ARMv5 mul pseudos
83  void EmitPatchedInstruction(const MachineInstr *MI, unsigned TargetOpc);
84
85public:
86  void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
87
88  MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
89
90  virtual unsigned getISAEncoding() {
91    // ARM/Darwin adds ISA to the DWARF info for each function.
92    if (!Subtarget->isTargetDarwin())
93      return 0;
94    return Subtarget->isThumb() ?
95      llvm::ARM::DW_ISA_ARM_thumb : llvm::ARM::DW_ISA_ARM_arm;
96  }
97
98  MCSymbol *GetARMSetPICJumpTableLabel2(unsigned uid, unsigned uid2,
99                                        const MachineBasicBlock *MBB) const;
100  MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const;
101
102  MCSymbol *GetARMSJLJEHLabel(void) const;
103
104  MCSymbol *GetARMGVSymbol(const GlobalValue *GV);
105
106  /// EmitMachineConstantPoolValue - Print a machine constantpool value to
107  /// the .s file.
108  virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
109};
110} // end namespace llvm
111
112#endif
113