class User : public Value {
User(const User &); // Do not implement
+protected:
+ std::vector<Use> Operands;
public:
- User(const Type *Ty, ValueTy vty, const string &name = "");
- virtual ~User() {}
+ User(const Type *Ty, ValueTy vty, const std::string &name = "");
+ virtual ~User() { dropAllReferences(); }
- // if i > the number of operands, then getOperand() returns 0, and setOperand
- // returns false. setOperand() may also return false if the operand is of
- // the wrong type.
+ inline Value *getOperand(unsigned i) {
+ assert(i < Operands.size() && "getOperand() out of range!");
+ return Operands[i];
+ }
+ inline const Value *getOperand(unsigned i) const {
+ assert(i < Operands.size() && "getOperand() const out of range!");
+ return Operands[i];
+ }
+ inline void setOperand(unsigned i, Value *Val) {
+ assert(i < Operands.size() && "setOperand() out of range!");
+ Operands[i] = Val;
+ }
+ inline void eraseOperand(unsigned i) {
+ assert(i < Operands.size() && "setOperand() out of range!");
+ Operands.erase(Operands.begin() + i);
+ }
+ inline unsigned getNumOperands() const { return Operands.size(); }
+
+ // ---------------------------------------------------------------------------
+ // Operand Iterator interface...
//
- virtual Value *getOperand(unsigned i) = 0;
- virtual const Value *getOperand(unsigned i) const = 0;
- virtual bool setOperand(unsigned i, Value *Val) = 0;
+ typedef std::vector<Use>::iterator op_iterator;
+ typedef std::vector<Use>::const_iterator const_op_iterator;
+
+ inline op_iterator op_begin() { return Operands.begin(); }
+ inline const_op_iterator op_begin() const { return Operands.begin(); }
+ inline op_iterator op_end() { return Operands.end(); }
+ inline const_op_iterator op_end() const { return Operands.end(); }
- // dropAllReferences() - This virtual function should be overridden to "let
- // go" of all references that this user is maintaining. This allows one to
+ // dropAllReferences() - This function is in charge of "letting go" of all
+ // objects that this User refers to. This allows one to
// 'delete' a whole class at a time, even though there may be circular
// references... first all references are dropped, and all use counts go to
// zero. Then everything is delete'd for real. Note that no operations are
// valid on an object that has "dropped all references", except operator
// delete.
//
- virtual void dropAllReferences() = 0;
+ inline void dropAllReferences() {
+ Operands.clear();
+ }
- // replaceUsesOfWith - Replaces all references to the "From" definition with
- // references to the "To" definition. (defined in Value.cpp)
- //
+ /// replaceUsesOfWith - Replaces all references to the "From" definition with
+ /// references to the "To" definition.
+ ///
void replaceUsesOfWith(Value *From, Value *To);
+
+ // Methods for support type inquiry through isa, cast, and dyn_cast:
+ static inline bool classof(const User *) { return true; }
+ static inline bool classof(const Value *V) {
+ return V->getValueType() == Value::GlobalVariableVal ||
+ V->getValueType() == Value::ConstantVal ||
+ V->getValueType() == Value::InstructionVal;
+ }
};
#endif