src/llvm/include/llvm/CodeGen/MachineModuleInfoImpls.h

   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:
  43     MachineModuleInfoMachO(const MachineModuleInfo &) {}
  44
  45     StubValueTy &getFnStubEntry(MCSymbol *Sym) {
  46       assert(Sym && "Key cannot be null");
  47       return FnStubs[Sym];
  48     }
  49
  50     StubValueTy &getGVStubEntry(MCSymbol *Sym) {
  51       assert(Sym && "Key cannot be null");
  52       return GVStubs[Sym];
  53     }
  54
  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.
  61     SymbolListTy GetFnStubList() const {
  62       return GetSortedStubs(FnStubs);
  63     }
  64     SymbolListTy GetGVStubList() const {
  65       return GetSortedStubs(GVStubs);
  66     }
  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:
  81     MachineModuleInfoELF(const MachineModuleInfo &) {}
  82
  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
  90     SymbolListTy GetGVStubList() const {
  91       return GetSortedStubs(GVStubs);
  92     }
  93   };
  94
  95 } // end namespace llvm
  96
  97 #endif