MachineModuleInfoImpls.h revision 327952 
1//===- llvm/CodeGen/MachineModuleInfoImpls.h --------------------*- 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 defines object-file format specific implementations of
11// MachineModuleInfoImpl.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CODEGEN_MACHINEMODULEINFOIMPLS_H
16#define LLVM_CODEGEN_MACHINEMODULEINFOIMPLS_H
17
18#include "llvm/ADT/DenseMap.h"
19#include "llvm/CodeGen/MachineModuleInfo.h"
20#include <cassert>
21
22namespace llvm {
23
24class MCSymbol;
25
26/// MachineModuleInfoMachO - This is a MachineModuleInfoImpl implementation
27/// for MachO targets.
28class MachineModuleInfoMachO : public MachineModuleInfoImpl {
29  /// GVStubs - Darwin '$non_lazy_ptr' stubs.  The key is something like
30  /// "Lfoo$non_lazy_ptr", the value is something like "_foo". The extra bit
31  /// is true if this GV is external.
32  DenseMap<MCSymbol *, StubValueTy> GVStubs;
33
34  /// ThreadLocalGVStubs - Darwin '$non_lazy_ptr' stubs.  The key is something
35  /// like "Lfoo$non_lazy_ptr", the value is something like "_foo". The extra
36  /// bit is true if this GV is external.
37  DenseMap<MCSymbol *, StubValueTy> ThreadLocalGVStubs;
38
39  virtual void anchor(); // Out of line virtual method.
40
41public:
42  MachineModuleInfoMachO(const MachineModuleInfo &) {}
43
44  StubValueTy &getGVStubEntry(MCSymbol *Sym) {
45    assert(Sym && "Key cannot be null");
46    return GVStubs[Sym];
47  }
48
49  StubValueTy &getThreadLocalGVStubEntry(MCSymbol *Sym) {
50    assert(Sym && "Key cannot be null");
51    return ThreadLocalGVStubs[Sym];
52  }
53
54  /// Accessor methods to return the set of stubs in sorted order.
55  SymbolListTy GetGVStubList() { return getSortedStubs(GVStubs); }
56  SymbolListTy GetThreadLocalGVStubList() {
57    return getSortedStubs(ThreadLocalGVStubs);
58  }
59};
60
61/// MachineModuleInfoELF - This is a MachineModuleInfoImpl implementation
62/// for ELF targets.
63class MachineModuleInfoELF : public MachineModuleInfoImpl {
64  /// GVStubs - These stubs are used to materialize global addresses in PIC
65  /// mode.
66  DenseMap<MCSymbol *, StubValueTy> GVStubs;
67
68  virtual void anchor(); // Out of line virtual method.
69
70public:
71  MachineModuleInfoELF(const MachineModuleInfo &) {}
72
73  StubValueTy &getGVStubEntry(MCSymbol *Sym) {
74    assert(Sym && "Key cannot be null");
75    return GVStubs[Sym];
76  }
77
78  /// Accessor methods to return the set of stubs in sorted order.
79
80  SymbolListTy GetGVStubList() { return getSortedStubs(GVStubs); }
81};
82
83} // end namespace llvm
84
85#endif // LLVM_CODEGEN_MACHINEMODULEINFOIMPLS_H
86