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//===-- llvm/ConstantPool.h - Define the constant pool class ------*- C++ -*-=//
//
// This file implements a constant pool that is split into different type
// planes. This allows searching for a typed object to go a little faster.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CONSTANTPOOL_H
#define LLVM_CONSTANTPOOL_H
#include <vector>
#include "llvm/ValueHolder.h"
class ConstPoolVal;
class SymTabValue;
class Type;
class ConstantPool {
public:
typedef ValueHolder<ConstPoolVal, SymTabValue> PlaneType;
private:
typedef vector<PlaneType*> PlanesType;
PlanesType Planes;
SymTabValue *Parent;
inline void resize(unsigned size);
public:
inline ConstantPool(SymTabValue *P) { Parent = P; }
inline ~ConstantPool() { delete_all(); }
inline SymTabValue *getParent() { return Parent; }
inline const SymTabValue *getParent() const { return Parent; }
void setParent(SymTabValue *STV);
void dropAllReferences(); // Drop all references to other constants
// Constant getPlane - Returns true if the type plane does not exist,
// otherwise updates the pointer to point to the correct plane.
//
bool getPlane(const Type *T, const PlaneType *&Plane) const;
bool getPlane(const Type *T, PlaneType *&Plane);
// Normal getPlane - Resizes constant pool to contain type even if it doesn't
// already have it.
//
PlaneType &getPlane(const Type *T);
// insert - Add constant into the symbol table...
void insert(ConstPoolVal *N);
bool remove(ConstPoolVal *N); // Returns true on failure
void delete_all();
// find - Search to see if a constant of the specified value is already in
// the constant table.
//
const ConstPoolVal *find(const ConstPoolVal *V) const;
ConstPoolVal *find(const ConstPoolVal *V) ;
const ConstPoolVal *find(const Type *Ty) const;
ConstPoolVal *find(const Type *Ty) ;
// Plane iteration support
//
typedef PlanesType::iterator plane_iterator;
typedef PlanesType::const_iterator plane_const_iterator;
inline plane_iterator begin() { return Planes.begin(); }
inline plane_const_iterator begin() const { return Planes.begin(); }
inline plane_iterator end() { return Planes.end(); }
inline plane_const_iterator end() const { return Planes.end(); }
};
#endif
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