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//===-- llvm/Instruction.h - Instruction class definition --------*- C++ -*--=//
//
// This file contains the declaration of the Instruction class, which is the
// base class for all of the VM instructions.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_INSTRUCTION_H
#define LLVM_INSTRUCTION_H
#include "llvm/User.h"
class Type;
class BasicBlock;
class Method;
class Instruction : public User {
BasicBlock *Parent;
unsigned iType; // InstructionType
friend class ValueHolder<Instruction,BasicBlock>;
inline void setParent(BasicBlock *P) { Parent = P; }
public:
Instruction(const Type *Ty, unsigned iType, const string &Name = "");
virtual ~Instruction(); // Virtual dtor == good.
// Specialize setName to handle symbol table majik...
virtual void setName(const string &name);
// clone() - Create a copy of 'this' instruction that is identical in all ways
// except the following:
// * The instruction has no parent
// * The instruction has no name
//
virtual Instruction *clone() const = 0;
// Accessor methods...
//
inline const BasicBlock *getParent() const { return Parent; }
inline BasicBlock *getParent() { return Parent; }
bool hasSideEffects() const { return false; } // Memory & Call insts = true
// ---------------------------------------------------------------------------
// Implement the User interface
// 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) {
return (Value*)((const Instruction *)this)->getOperand(i);
}
virtual const Value *getOperand(unsigned i) const = 0;
virtual bool setOperand(unsigned i, Value *Val) = 0;
virtual unsigned getNumOperands() const = 0;
// ---------------------------------------------------------------------------
// Operand Iterator interface...
//
template <class _Inst, class _Val> class OperandIterator;
typedef OperandIterator<Instruction *, Value *> op_iterator;
typedef OperandIterator<const Instruction *, const Value *> op_const_iterator;
inline op_iterator op_begin() ;
inline op_const_iterator op_begin() const;
inline op_iterator op_end() ;
inline op_const_iterator op_end() const;
// ---------------------------------------------------------------------------
// Subclass classification... getInstType() returns a member of
// one of the enums that is coming soon (down below)...
//
virtual string getOpcode() const = 0;
unsigned getInstType() const { return iType; }
inline bool isTerminator() const { // Instance of TerminatorInst?
return iType >= FirstTermOp && iType < NumTermOps;
}
inline bool isDefinition() const { return !isTerminator(); }
inline bool isUnaryOp() const {
return iType >= FirstUnaryOp && iType < NumUnaryOps;
}
inline bool isBinaryOp() const {
return iType >= FirstBinaryOp && iType < NumBinaryOps;
}
static Instruction *getBinaryOperator(unsigned Op, Value *S1, Value *S2);
static Instruction *getUnaryOperator (unsigned Op, Value *Source);
//----------------------------------------------------------------------
// Exported enumerations...
//
enum TermOps { // These terminate basic blocks
FirstTermOp = 1,
Ret = 1, Br, Switch,
NumTermOps // Must remain at end of enum
};
enum UnaryOps {
FirstUnaryOp = NumTermOps,
Neg = NumTermOps, Not,
// Type conversions...
ToBoolTy ,
ToUByteTy , ToSByteTy, ToUShortTy, ToShortTy,
ToUInt , ToInt, ToULongTy , ToLongTy,
ToFloatTy , ToDoubleTy, ToArrayTy , ToPointerTy,
NumUnaryOps // Must remain at end of enum
};
enum BinaryOps {
// Standard binary operators...
FirstBinaryOp = NumUnaryOps,
Add = NumUnaryOps, Sub, Mul, Div, Rem,
// Logical operators...
And, Or, Xor,
// Binary comparison operators...
SetEQ, SetNE, SetLE, SetGE, SetLT, SetGT,
NumBinaryOps
};
enum MemoryOps {
FirstMemoryOp = NumBinaryOps,
Malloc = NumBinaryOps, Free, // Heap management instructions
Alloca, // Stack management instruction
Load, Store, // Memory manipulation instructions.
GetField, PutField, // Structure manipulation instructions
NumMemoryOps
};
enum OtherOps {
FirstOtherOp = NumMemoryOps,
PHINode = NumMemoryOps, // PHI node instruction
Call, // Call a function
Shl, Shr, // Shift operations...
NumOps, // Must be the last 'op' defined.
UserOp1, UserOp2 // May be used internally to a pass...
};
public:
template <class _Inst, class _Val> // Operand Iterator Implementation
class OperandIterator {
const _Inst Inst;
unsigned idx;
public:
typedef OperandIterator<_Inst, _Val> _Self;
typedef forward_iterator_tag iterator_category;
typedef _Val pointer;
inline OperandIterator(_Inst T) : Inst(T), idx(0) {} // begin iterator
inline OperandIterator(_Inst T, bool)
: Inst(T), idx(Inst->getNumOperands()) {} // end iterator
inline bool operator==(const _Self& x) const { return idx == x.idx; }
inline bool operator!=(const _Self& x) const { return !operator==(x); }
inline pointer operator*() const { return Inst->getOperand(idx); }
inline pointer *operator->() const { return &(operator*()); }
inline _Self& operator++() { ++idx; return *this; } // Preincrement
inline _Self operator++(int) { // Postincrement
_Self tmp = *this; ++*this; return tmp;
}
inline _Self& operator--() { --idx; return *this; } // Predecrement
inline _Self operator--(int) { // Postdecrement
_Self tmp = *this; --*this; return tmp;
}
};
};
inline Instruction::op_iterator Instruction::op_begin() {
return op_iterator(this);
}
inline Instruction::op_const_iterator Instruction::op_begin() const {
return op_const_iterator(this);
}
inline Instruction::op_iterator Instruction::op_end() {
return op_iterator(this,true);
}
inline Instruction::op_const_iterator Instruction::op_end() const {
return op_const_iterator(this,true);
}
#endif
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