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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/ADT/DenseMap.h"
     19 #include "llvm/CodeGen/MachineModuleInfo.h"
     20 #include <cassert>
     21 
     22 namespace llvm {
     23 
     24 class MCSymbol;
     25 
     26 /// MachineModuleInfoMachO - This is a MachineModuleInfoImpl implementation
     27 /// for MachO targets.
     28 class 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 
     41 public:
     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.
     63 class 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 
     70 public:
     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