mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 00:11:00 +00:00
1da2972d26
dangerous, and not something we want to expose. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4007 91177308-0d34-0410-b5e6-96231b3b80d8
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
//===-- llvm/User.h - User class definition ----------------------*- C++ -*--=//
|
|
//
|
|
// This class defines the interface that one who 'use's a Value must implement.
|
|
// Each instance of the Value class keeps track of what User's have handles
|
|
// to it.
|
|
//
|
|
// * Instructions are the largest class of User's.
|
|
// * Constants may be users of other constants (think arrays and stuff)
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_USER_H
|
|
#define LLVM_USER_H
|
|
|
|
#include "llvm/Value.h"
|
|
|
|
class User : public Value {
|
|
User(const User &); // Do not implement
|
|
protected:
|
|
std::vector<Use> Operands;
|
|
public:
|
|
User(const Type *Ty, ValueTy vty, const std::string &name = "");
|
|
virtual ~User() { dropAllReferences(); }
|
|
|
|
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 unsigned getNumOperands() const { return Operands.size(); }
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Operand Iterator interface...
|
|
//
|
|
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 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.
|
|
//
|
|
inline void dropAllReferences() {
|
|
Operands.clear();
|
|
}
|
|
|
|
/// 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
|