MCCodeEmitter.h revision 1d6547eb49ef46d2606810f0abad2570c41e38bd 
1//===-- llvm/MC/MCCodeEmitter.h - Instruction Encoding ----------*- 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#ifndef LLVM_MC_MCCODEEMITTER_H
11#define LLVM_MC_MCCODEEMITTER_H
12
13#include "llvm/MC/MCFixup.h"
14#include "llvm/MC/MCFixupKindInfo.h"
15
16#include <cassert>
17
18namespace llvm {
19class MCExpr;
20class MCInst;
21class raw_ostream;
22template<typename T> class SmallVectorImpl;
23
24/// MCCodeEmitter - Generic instruction encoding interface.
25class MCCodeEmitter {
26private:
27  MCCodeEmitter(const MCCodeEmitter &);   // DO NOT IMPLEMENT
28  void operator=(const MCCodeEmitter &);  // DO NOT IMPLEMENT
29protected: // Can only create subclasses.
30  MCCodeEmitter();
31
32public:
33  virtual ~MCCodeEmitter();
34
35  /// @name Target Independent Fixup Information
36  /// @{
37
38  /// getNumFixupKinds - Get the number of target specific fixup kinds.
39  virtual unsigned getNumFixupKinds() const = 0;
40
41  /// getFixupKindInfo - Get information on a fixup kind.
42  virtual const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const;
43
44  /// @}
45
46  /// EncodeInstruction - Encode the given \arg Inst to bytes on the output
47  /// stream \arg OS.
48  virtual void EncodeInstruction(const MCInst &Inst, raw_ostream &OS,
49                                 SmallVectorImpl<MCFixup> &Fixups) const = 0;
50};
51
52} // End llvm namespace
53
54#endif
55