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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/CodeGen/MachineModuleInfo.h"
19 
20 namespace llvm {
21   class MCSymbol;
22 
23   /// MachineModuleInfoMachO - This is a MachineModuleInfoImpl implementation
24   /// for MachO targets.
25   class MachineModuleInfoMachO : public MachineModuleInfoImpl {
26     /// FnStubs - Darwin '$stub' stubs.  The key is something like "Lfoo$stub",
27     /// the value is something like "_foo".
28     DenseMap<MCSymbol*, StubValueTy> FnStubs;
29 
30     /// GVStubs - Darwin '$non_lazy_ptr' stubs.  The key is something like
31     /// "Lfoo$non_lazy_ptr", the value is something like "_foo". The extra bit
32     /// is true if this GV is external.
33     DenseMap<MCSymbol*, StubValueTy> GVStubs;
34 
35     /// HiddenGVStubs - Darwin '$non_lazy_ptr' stubs.  The key is something like
36     /// "Lfoo$non_lazy_ptr", the value is something like "_foo".  Unlike GVStubs
37     /// these are for things with hidden visibility. The extra bit is true if
38     /// this GV is external.
39     DenseMap<MCSymbol*, StubValueTy> HiddenGVStubs;
40 
41     virtual void Anchor();  // Out of line virtual method.
42   public:
MachineModuleInfoMachO(const MachineModuleInfo &)43     MachineModuleInfoMachO(const MachineModuleInfo &) {}
44 
getFnStubEntry(MCSymbol * Sym)45     StubValueTy &getFnStubEntry(MCSymbol *Sym) {
46       assert(Sym && "Key cannot be null");
47       return FnStubs[Sym];
48     }
49 
getGVStubEntry(MCSymbol * Sym)50     StubValueTy &getGVStubEntry(MCSymbol *Sym) {
51       assert(Sym && "Key cannot be null");
52       return GVStubs[Sym];
53     }
54 
getHiddenGVStubEntry(MCSymbol * Sym)55     StubValueTy &getHiddenGVStubEntry(MCSymbol *Sym) {
56       assert(Sym && "Key cannot be null");
57       return HiddenGVStubs[Sym];
58     }
59 
60     /// Accessor methods to return the set of stubs in sorted order.
GetFnStubList()61     SymbolListTy GetFnStubList() const {
62       return GetSortedStubs(FnStubs);
63     }
GetGVStubList()64     SymbolListTy GetGVStubList() const {
65       return GetSortedStubs(GVStubs);
66     }
GetHiddenGVStubList()67     SymbolListTy GetHiddenGVStubList() const {
68       return GetSortedStubs(HiddenGVStubs);
69     }
70   };
71 
72   /// MachineModuleInfoELF - This is a MachineModuleInfoImpl implementation
73   /// for ELF targets.
74   class MachineModuleInfoELF : public MachineModuleInfoImpl {
75     /// GVStubs - These stubs are used to materialize global addresses in PIC
76     /// mode.
77     DenseMap<MCSymbol*, StubValueTy> GVStubs;
78 
79     virtual void Anchor();  // Out of line virtual method.
80   public:
MachineModuleInfoELF(const MachineModuleInfo &)81     MachineModuleInfoELF(const MachineModuleInfo &) {}
82 
getGVStubEntry(MCSymbol * Sym)83     StubValueTy &getGVStubEntry(MCSymbol *Sym) {
84       assert(Sym && "Key cannot be null");
85       return GVStubs[Sym];
86     }
87 
88     /// Accessor methods to return the set of stubs in sorted order.
89 
GetGVStubList()90     SymbolListTy GetGVStubList() const {
91       return GetSortedStubs(GVStubs);
92     }
93   };
94 
95 } // end namespace llvm
96 
97 #endif
98