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//===- llvm/CodeGen/MachineModuleInfoImpls.h --------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines object-file format specific implementations of
// MachineModuleInfoImpl.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_MACHINEMODULEINFOIMPLS_H
#define LLVM_CODEGEN_MACHINEMODULEINFOIMPLS_H

#include "llvm/ADT/DenseMap.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include <cassert>

namespace llvm {

class MCSymbol;

/// MachineModuleInfoMachO - This is a MachineModuleInfoImpl implementation
/// for MachO targets.
class MachineModuleInfoMachO : public MachineModuleInfoImpl {
  /// GVStubs - Darwin '$non_lazy_ptr' stubs.  The key is something like
  /// "Lfoo$non_lazy_ptr", the value is something like "_foo". The extra bit
  /// is true if this GV is external.
  DenseMap<MCSymbol *, StubValueTy> GVStubs;

  /// ThreadLocalGVStubs - Darwin '$non_lazy_ptr' stubs.  The key is something
  /// like "Lfoo$non_lazy_ptr", the value is something like "_foo". The extra
  /// bit is true if this GV is external.
  DenseMap<MCSymbol *, StubValueTy> ThreadLocalGVStubs;

  virtual void anchor(); // Out of line virtual method.

public:
  MachineModuleInfoMachO(const MachineModuleInfo &) {}

  StubValueTy &getGVStubEntry(MCSymbol *Sym) {
    assert(Sym && "Key cannot be null");
    return GVStubs[Sym];
  }

  StubValueTy &getThreadLocalGVStubEntry(MCSymbol *Sym) {
    assert(Sym && "Key cannot be null");
    return ThreadLocalGVStubs[Sym];
  }

  /// Accessor methods to return the set of stubs in sorted order.
  SymbolListTy GetGVStubList() { return getSortedStubs(GVStubs); }
  SymbolListTy GetThreadLocalGVStubList() {
    return getSortedStubs(ThreadLocalGVStubs);
  }
};

/// MachineModuleInfoELF - This is a MachineModuleInfoImpl implementation
/// for ELF targets.
class MachineModuleInfoELF : public MachineModuleInfoImpl {
  /// GVStubs - These stubs are used to materialize global addresses in PIC
  /// mode.
  DenseMap<MCSymbol *, StubValueTy> GVStubs;

  virtual void anchor(); // Out of line virtual method.

public:
  MachineModuleInfoELF(const MachineModuleInfo &) {}

  StubValueTy &getGVStubEntry(MCSymbol *Sym) {
    assert(Sym && "Key cannot be null");
    return GVStubs[Sym];
  }

  /// Accessor methods to return the set of stubs in sorted order.

  SymbolListTy GetGVStubList() { return getSortedStubs(GVStubs); }
};

} // end namespace llvm

#endif // LLVM_CODEGEN_MACHINEMODULEINFOIMPLS_H