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//===-- llvm/CodeGen/PseudoSourceValue.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 contains the declaration of the PseudoSourceValue class.


#include "llvm/Value.h"

namespace llvm {
  class MachineFrameInfo;
  class raw_ostream;

  /// PseudoSourceValue - Special value supplied for machine level alias
  /// analysis. It indicates that the a memory access references the functions
  /// stack frame (e.g., a spill slot), below the stack frame (e.g., argument
  /// space), or constant pool.
  class PseudoSourceValue : public Value {

    virtual void print(raw_ostream &OS) const;

    /// isConstant - Test whether this PseudoSourceValue has a constant value.
    virtual bool isConstant(const MachineFrameInfo *) const;

    /// classof - Methods for support type inquiry through isa, cast, and
    /// dyn_cast:
    static inline bool classof(const PseudoSourceValue *) { return true; }
    static inline bool classof(const Value *V) {
      return V->getValueID() == PseudoSourceValueVal;

    /// A pseudo source value referencing a fixed stack frame entry,
    /// e.g., a spill slot.
    static const PseudoSourceValue *getFixedStack(int FI);

    /// A source value referencing the area below the stack frame of a function,
    /// e.g., the argument space.
    static const PseudoSourceValue *getStack();

    /// A source value referencing the global offset table (or something the
    /// like).
    static const PseudoSourceValue *getGOT();

    /// A SV referencing the constant pool
    static const PseudoSourceValue *getConstantPool();

    /// A SV referencing the jump table
    static const PseudoSourceValue *getJumpTable();
} // End llvm namespace