MCJIT.h revision fcbe5b71936b820647dffff0e4f9c60ece3988a5 
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        RTDyldMemoryManager *MemMgr, CodeGenOpt::Level OptLevel,
28        bool AllocateGVsWithCode);
29
30  TargetMachine *TM;
31  MCContext *Ctx;
32  RTDyldMemoryManager *MemMgr;
33
34  // FIXME: These may need moved to a separate 'jitstate' member like the
35  // non-MC JIT does for multithreading and such. Just keep them here for now.
36  PassManager PM;
37  Module *M;
38  // FIXME: This really doesn't belong here.
39  SmallVector<char, 4096> Buffer; // Working buffer into which we JIT.
40  raw_svector_ostream OS;
41
42  RuntimeDyld Dyld;
43
44public:
45  ~MCJIT();
46
47  /// @name ExecutionEngine interface implementation
48  /// @{
49
50  virtual void *getPointerToBasicBlock(BasicBlock *BB);
51
52  virtual void *getPointerToFunction(Function *F);
53
54  virtual void *recompileAndRelinkFunction(Function *F);
55
56  virtual void freeMachineCodeForFunction(Function *F);
57
58  virtual GenericValue runFunction(Function *F,
59                                   const std::vector<GenericValue> &ArgValues);
60
61  /// getPointerToNamedFunction - This method returns the address of the
62  /// specified function by using the dlsym function call.  As such it is only
63  /// useful for resolving library symbols, not code generated symbols.
64  ///
65  /// If AbortOnFailure is false and no function with the given name is
66  /// found, this function silently returns a null pointer. Otherwise,
67  /// it prints a message to stderr and aborts.
68  ///
69  void *getPointerToNamedFunction(const std::string &Name,
70                                  bool AbortOnFailure = true);
71  /// @}
72  /// @name (Private) Registration Interfaces
73  /// @{
74
75  static void Register() {
76    MCJITCtor = createJIT;
77  }
78
79  // FIXME: This routine is scheduled for termination. Do not use it.
80  static TargetMachine *selectTarget(Module *M,
81                                     StringRef MArch,
82                                     StringRef MCPU,
83                                     const SmallVectorImpl<std::string>& MAttrs,
84                                     std::string *Err);
85
86  static ExecutionEngine *createJIT(Module *M,
87                                    std::string *ErrorStr,
88                                    JITMemoryManager *JMM,
89                                    CodeGenOpt::Level OptLevel,
90                                    bool GVsWithCode,
91                                    CodeModel::Model CMM,
92                                    StringRef MArch,
93                                    StringRef MCPU,
94                                    const SmallVectorImpl<std::string>& MAttrs);
95
96  // @}
97};
98
99} // End llvm namespace
100
101#endif
102