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//===-- llvm/InstrTypes.h - Important Instruction subclasses -----*- C++ -*--=//
//
// This file defines various meta classes of instructions that exist in the VM
// representation. Specific concrete subclasses of these may be found in the
// i*.h files...
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_INSTRUCTION_TYPES_H
#define LLVM_INSTRUCTION_TYPES_H
#include "llvm/Instruction.h"
#include <list>
#include <vector>
class Method;
class SymTabValue;
//===----------------------------------------------------------------------===//
// TerminatorInst Class
//===----------------------------------------------------------------------===//
// TerminatorInst - Subclasses of this class are all able to terminate a basic
// block. Thus, these are all the flow control type of operations.
//
class TerminatorInst : public Instruction {
public:
TerminatorInst(unsigned iType);
inline ~TerminatorInst() {}
// Terminators must implement the methods required by Instruction...
virtual Instruction *clone() const = 0;
virtual void dropAllReferences() = 0;
virtual string getOpcode() const = 0;
virtual bool setOperand(unsigned i, Value *Val) = 0;
virtual const Value *getOperand(unsigned i) const = 0;
// Additionally, they must provide a method to get at the successors of this
// terminator instruction. If 'idx' is out of range, a null pointer shall be
// returned.
//
virtual const BasicBlock *getSuccessor(unsigned idx) const = 0;
virtual unsigned getNumSuccessors() const = 0;
inline BasicBlock *getSuccessor(unsigned idx) {
return (BasicBlock*)((const TerminatorInst *)this)->getSuccessor(idx);
}
};
//===----------------------------------------------------------------------===//
// UnaryOperator Class
//===----------------------------------------------------------------------===//
class UnaryOperator : public Instruction {
Use Source;
public:
UnaryOperator(Value *S, unsigned iType, const string &Name = "")
: Instruction(S->getType(), iType, Name), Source(S, this) {
}
inline ~UnaryOperator() { dropAllReferences(); }
virtual Instruction *clone() const {
return Instruction::getUnaryOperator(getInstType(), Source);
}
virtual void dropAllReferences() {
Source = 0;
}
virtual string getOpcode() const = 0;
virtual unsigned getNumOperands() const { return 1; }
virtual const Value *getOperand(unsigned i) const {
return (i == 0) ? Source : 0;
}
virtual bool setOperand(unsigned i, Value *Val) {
// assert(Val && "operand must not be null!");
if (i) return false;
Source = Val;
return true;
}
};
//===----------------------------------------------------------------------===//
// BinaryOperator Class
//===----------------------------------------------------------------------===//
class BinaryOperator : public Instruction {
Use Source1, Source2;
public:
BinaryOperator(unsigned iType, Value *S1, Value *S2,
const string &Name = "")
: Instruction(S1->getType(), iType, Name), Source1(S1, this),
Source2(S2, this){
assert(S1 && S2 && S1->getType() == S2->getType());
}
inline ~BinaryOperator() { dropAllReferences(); }
virtual Instruction *clone() const {
return Instruction::getBinaryOperator(getInstType(), Source1, Source2);
}
virtual void dropAllReferences() {
Source1 = Source2 = 0;
}
virtual string getOpcode() const = 0;
virtual unsigned getNumOperands() const { return 2; }
virtual const Value *getOperand(unsigned i) const {
return (i == 0) ? Source1 : ((i == 1) ? Source2 : 0);
}
virtual bool setOperand(unsigned i, Value *Val) {
// assert(Val && "operand must not be null!");
if (i == 0) {
Source1 = Val; //assert(Val->getType() == Source2->getType());
} else if (i == 1) {
Source2 = Val; //assert(Val->getType() == Source1->getType());
} else {
return false;
}
return true;
}
};
#endif
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