MCJIT.h revision f922910494377909b4cf2a0b73f509b2b1925799 
1//===-- MCJIT.h - Class definition for the MCJIT ----------------*- 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_LIB_EXECUTIONENGINE_MCJIT_H
11#define LLVM_LIB_EXECUTIONENGINE_MCJIT_H
12
13#include "llvm/PassManager.h"
14#include "llvm/ExecutionEngine/ExecutionEngine.h"
15#include "llvm/ExecutionEngine/RuntimeDyld.h"
16#include "llvm/ADT/SmallVector.h"
17#include "llvm/Support/raw_ostream.h"
18
19namespace llvm {
20
21// FIXME: This makes all kinds of horrible assumptions for the time being,
22// like only having one module, not needing to worry about multi-threading,
23// blah blah. Purely in get-it-up-and-limping mode for now.
24
25class MCJIT : public ExecutionEngine {
26  MCJIT(Module *M, TargetMachine *tm, TargetJITInfo &tji,
27        JITMemoryManager *JMM, CodeGenOpt::Level OptLevel,
28        bool AllocateGVsWithCode);
29
30  TargetMachine *TM;
31  MCContext *Ctx;
32
33  // FIXME: These may need moved to a separate 'jitstate' member like the
34  // non-MC JIT does for multithreading and such. Just keep them here for now.
35  PassManager PM;
36  Module *M;
37  // FIXME: This really doesn't belong here.
38  SmallVector<char, 4096> Buffer; // Working buffer into which we JIT.
39  raw_svector_ostream OS;
40
41  RuntimeDyld Dyld;
42
43public:
44  ~MCJIT();
45
46  /// @name ExecutionEngine interface implementation
47  /// @{
48
49  virtual void *getPointerToBasicBlock(BasicBlock *BB);
50
51  virtual void *getPointerToFunction(Function *F);
52
53  virtual void *recompileAndRelinkFunction(Function *F);
54
55  virtual void freeMachineCodeForFunction(Function *F);
56
57  virtual GenericValue runFunction(Function *F,
58                                   const std::vector<GenericValue> &ArgValues);
59
60  /// @}
61  /// @name (Private) Registration Interfaces
62  /// @{
63
64  static void Register() {
65    MCJITCtor = createJIT;
66  }
67
68  // FIXME: This routine is scheduled for termination. Do not use it.
69  static TargetMachine *selectTarget(Module *M,
70                                     StringRef MArch,
71                                     StringRef MCPU,
72                                     const SmallVectorImpl<std::string>& MAttrs,
73                                     std::string *Err);
74
75  static ExecutionEngine *createJIT(Module *M,
76                                    std::string *ErrorStr,
77                                    JITMemoryManager *JMM,
78                                    CodeGenOpt::Level OptLevel,
79                                    bool GVsWithCode,
80                                    CodeModel::Model CMM,
81                                    StringRef MArch,
82                                    StringRef MCPU,
83                                    const SmallVectorImpl<std::string>& MAttrs);
84
85  // @}
86};
87
88} // End llvm namespace
89
90#endif
91