mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-18 12:29:21 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21408 91177308-0d34-0410-b5e6-96231b3b80d8
118 lines
4.1 KiB
C++
118 lines
4.1 KiB
C++
//===-- llvm/User.h - User class definition ---------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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"
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
|
|
class User : public Value {
|
|
User(const User &); // Do not implement
|
|
protected:
|
|
/// OperandList - This is a pointer to the array of Users for this operand.
|
|
/// For nodes of fixed arity (e.g. a binary operator) this array will live
|
|
/// embedded into the derived class. For nodes of variable arity
|
|
/// (e.g. ConstantArrays, CallInst, PHINodes, etc), this memory will be
|
|
/// dynamically allocated and should be destroyed by the classes virtual dtor.
|
|
Use *OperandList;
|
|
|
|
/// NumOperands - The number of values used by this User.
|
|
///
|
|
unsigned NumOperands;
|
|
|
|
public:
|
|
User(const Type *Ty, unsigned vty, Use *OpList, unsigned NumOps,
|
|
const std::string &name = "")
|
|
: Value(Ty, vty, name), OperandList(OpList), NumOperands(NumOps) {}
|
|
|
|
Value *getOperand(unsigned i) const {
|
|
assert(i < NumOperands && "getOperand() out of range!");
|
|
return OperandList[i];
|
|
}
|
|
void setOperand(unsigned i, Value *Val) {
|
|
assert(i < NumOperands && "setOperand() out of range!");
|
|
OperandList[i] = Val;
|
|
}
|
|
unsigned getNumOperands() const { return NumOperands; }
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Operand Iterator interface...
|
|
//
|
|
typedef Use* op_iterator;
|
|
typedef const Use* const_op_iterator;
|
|
|
|
inline op_iterator op_begin() { return OperandList; }
|
|
inline const_op_iterator op_begin() const { return OperandList; }
|
|
inline op_iterator op_end() { return OperandList+NumOperands; }
|
|
inline const_op_iterator op_end() const { return OperandList+NumOperands; }
|
|
|
|
// 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.
|
|
//
|
|
void dropAllReferences() {
|
|
Use *OL = OperandList;
|
|
for (unsigned i = 0, e = NumOperands; i != e; ++i)
|
|
OL[i].set(0);
|
|
}
|
|
|
|
/// 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 isa<Instruction>(V) || isa<Constant>(V);
|
|
}
|
|
};
|
|
|
|
template<> struct simplify_type<User::op_iterator> {
|
|
typedef Value* SimpleType;
|
|
|
|
static SimpleType getSimplifiedValue(const User::op_iterator &Val) {
|
|
return static_cast<SimpleType>(Val->get());
|
|
}
|
|
};
|
|
|
|
template<> struct simplify_type<const User::op_iterator>
|
|
: public simplify_type<User::op_iterator> {};
|
|
|
|
template<> struct simplify_type<User::const_op_iterator> {
|
|
typedef Value* SimpleType;
|
|
|
|
static SimpleType getSimplifiedValue(const User::const_op_iterator &Val) {
|
|
return static_cast<SimpleType>(Val->get());
|
|
}
|
|
};
|
|
|
|
template<> struct simplify_type<const User::const_op_iterator>
|
|
: public simplify_type<User::const_op_iterator> {};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|