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//===-- llvm/BinaryOperators.h - BinaryOperator subclasses ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines various classes for working with specific BinaryOperators,
// exposing special properties that individual operations have.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BINARY_OPTERATORS_H
#define LLVM_BINARY_OPTERATORS_H
#include "llvm/InstrTypes.h"
namespace llvm {
//===----------------------------------------------------------------------===//
// SpecificBinaryOperator Class
//===----------------------------------------------------------------------===//
/// SpecificBinaryOperator - This is a base class for utility classes that
/// provide additional information about binary operator instructions with
/// specific opcodes.
///
class SpecificBinaryOperator : public BinaryOperator {
private:
// Do not implement any of these. The SpecificBinaryOperator class is
// intended to be used as a utility, and is never itself instantiated.
void *operator new(size_t, unsigned);
void *operator new(size_t s);
void Create(BinaryOps Op, Value *S1, Value *S2,
const std::string &Name = "",
Instruction *InsertBefore = 0);
void Create(BinaryOps Op, Value *S1, Value *S2,
const std::string &Name,
BasicBlock *InsertAtEnd);
SpecificBinaryOperator();
~SpecificBinaryOperator();
void init(BinaryOps iType);
};
/// OverflowingBinaryOperator - Base class for integer arithmetic operators
/// which may exhibit overflow - Add, Sub, and Mul.
///
class OverflowingBinaryOperator : public SpecificBinaryOperator {
public:
/// hasNoSignedOverflow - Test whether this operation is known to never
/// undergo signed overflow.
bool hasNoSignedOverflow() const {
return SubclassOptionalData & (1 << 0);
}
void setHasNoSignedOverflow(bool B) {
SubclassOptionalData = (SubclassOptionalData & ~(1 << 0)) | (B << 0);
}
/// hasNoUnsignedOverflow - Test whether this operation is known to never
/// undergo unsigned overflow.
bool hasNoUnsignedOverflow() const {
return SubclassOptionalData & (1 << 1);
}
void setHasNoUnsignedOverflow(bool B) {
SubclassOptionalData = (SubclassOptionalData & ~(1 << 1)) | (B << 1);
}
static inline bool classof(const OverflowingBinaryOperator *) { return true; }
static inline bool classof(const BinaryOperator *BO) {
return BO->getOpcode() == Instruction::Add ||
BO->getOpcode() == Instruction::Sub ||
BO->getOpcode() == Instruction::Mul;
}
static inline bool classof(const Instruction *I) {
return I->isBinaryOp() && classof(cast<BinaryOperator>(I));
}
static inline bool classof(const Value *V) {
return isa<Instruction>(V) && classof(cast<Instruction>(V));
}
};
/// UDivInst - BinaryOperators with opcode Instruction::UDiv.
///
class UDivInst : public SpecificBinaryOperator {
public:
/// isExact - Test whether this division is known to be exact, with
/// zero remainder.
bool isExact() const {
return SubclassOptionalData & (1 << 0);
}
void setIsExact(bool B) {
SubclassOptionalData = (SubclassOptionalData & ~(1 << 0)) | (B << 0);
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const UDivInst *) { return true; }
static inline bool classof(const BinaryOperator *BO) {
return BO->getOpcode() == Instruction::UDiv;
}
static inline bool classof(const Instruction *I) {
return I->isBinaryOp() && classof(cast<BinaryOperator>(I));
}
static inline bool classof(const Value *V) {
return isa<Instruction>(V) && classof(cast<Instruction>(V));
}
};
} // End llvm namespace
#endif
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