X86TargetMachine.h revision 202878 
1//===-- X86TargetMachine.h - Define TargetMachine for the X86 ---*- 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// This file declares the X86 specific subclass of TargetMachine.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef X86TARGETMACHINE_H
15#define X86TARGETMACHINE_H
16
17#include "llvm/Target/TargetMachine.h"
18#include "llvm/Target/TargetData.h"
19#include "llvm/Target/TargetFrameInfo.h"
20#include "X86.h"
21#include "X86ELFWriterInfo.h"
22#include "X86InstrInfo.h"
23#include "X86JITInfo.h"
24#include "X86Subtarget.h"
25#include "X86ISelLowering.h"
26
27namespace llvm {
28
29class formatted_raw_ostream;
30
31class X86TargetMachine : public LLVMTargetMachine {
32  X86Subtarget      Subtarget;
33  const TargetData  DataLayout; // Calculates type size & alignment
34  TargetFrameInfo   FrameInfo;
35  X86InstrInfo      InstrInfo;
36  X86JITInfo        JITInfo;
37  X86TargetLowering TLInfo;
38  X86ELFWriterInfo  ELFWriterInfo;
39  Reloc::Model      DefRelocModel; // Reloc model before it's overridden.
40
41private:
42  // We have specific defaults for X86.
43  virtual void setCodeModelForJIT();
44  virtual void setCodeModelForStatic();
45
46public:
47  X86TargetMachine(const Target &T, const std::string &TT,
48                   const std::string &FS, bool is64Bit);
49
50  virtual const X86InstrInfo     *getInstrInfo() const { return &InstrInfo; }
51  virtual const TargetFrameInfo  *getFrameInfo() const { return &FrameInfo; }
52  virtual       X86JITInfo       *getJITInfo()         { return &JITInfo; }
53  virtual const X86Subtarget     *getSubtargetImpl() const{ return &Subtarget; }
54  virtual       X86TargetLowering *getTargetLowering() const {
55    return const_cast<X86TargetLowering*>(&TLInfo);
56  }
57  virtual const X86RegisterInfo  *getRegisterInfo() const {
58    return &InstrInfo.getRegisterInfo();
59  }
60  virtual const TargetData       *getTargetData() const { return &DataLayout; }
61  virtual const X86ELFWriterInfo *getELFWriterInfo() const {
62    return Subtarget.isTargetELF() ? &ELFWriterInfo : 0;
63  }
64
65  /// getLSDAEncoding - Returns the LSDA pointer encoding. The choices are
66  /// 4-byte, 8-byte, and target default. The CIE is hard-coded to indicate that
67  /// the LSDA pointer in the FDE section is an "sdata4", and should be encoded
68  /// as a 4-byte pointer by default. However, some systems may require a
69  /// different size due to bugs or other conditions. We will default to a
70  /// 4-byte encoding unless the system tells us otherwise.
71  ///
72  /// FIXME: This call-back isn't good! We should be using the correct encoding
73  /// regardless of the system. However, there are some systems which have bugs
74  /// that prevent this from occuring.
75  virtual DwarfLSDAEncoding::Encoding getLSDAEncoding() const;
76
77  // Set up the pass pipeline.
78  virtual bool addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel);
79  virtual bool addPreRegAlloc(PassManagerBase &PM, CodeGenOpt::Level OptLevel);
80  virtual bool addPostRegAlloc(PassManagerBase &PM, CodeGenOpt::Level OptLevel);
81  virtual bool addCodeEmitter(PassManagerBase &PM, CodeGenOpt::Level OptLevel,
82                              MachineCodeEmitter &MCE);
83  virtual bool addCodeEmitter(PassManagerBase &PM, CodeGenOpt::Level OptLevel,
84                              JITCodeEmitter &JCE);
85  virtual bool addCodeEmitter(PassManagerBase &PM, CodeGenOpt::Level OptLevel,
86                              ObjectCodeEmitter &OCE);
87  virtual bool addSimpleCodeEmitter(PassManagerBase &PM,
88                                    CodeGenOpt::Level OptLevel,
89                                    MachineCodeEmitter &MCE);
90  virtual bool addSimpleCodeEmitter(PassManagerBase &PM,
91                                    CodeGenOpt::Level OptLevel,
92                                    JITCodeEmitter &JCE);
93  virtual bool addSimpleCodeEmitter(PassManagerBase &PM,
94                                    CodeGenOpt::Level OptLevel,
95                                    ObjectCodeEmitter &OCE);
96};
97
98/// X86_32TargetMachine - X86 32-bit target machine.
99///
100class X86_32TargetMachine : public X86TargetMachine {
101public:
102  X86_32TargetMachine(const Target &T, const std::string &M,
103                      const std::string &FS);
104};
105
106/// X86_64TargetMachine - X86 64-bit target machine.
107///
108class X86_64TargetMachine : public X86TargetMachine {
109public:
110  X86_64TargetMachine(const Target &T, const std::string &TT,
111                      const std::string &FS);
112};
113
114} // End llvm namespace
115
116#endif
117