mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-01 00:12:50 +01:00
327 lines
9.9 KiB
C++
327 lines
9.9 KiB
C++
//===-- llvm/Operator.h - Operator utility subclass -------------*- 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 Instructions and
|
|
// ConstantExprs.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_OPERATOR_H
|
|
#define LLVM_OPERATOR_H
|
|
|
|
#include "llvm/Constants.h"
|
|
#include "llvm/Instruction.h"
|
|
#include "llvm/Type.h"
|
|
|
|
namespace llvm {
|
|
|
|
class GetElementPtrInst;
|
|
class BinaryOperator;
|
|
class ConstantExpr;
|
|
|
|
/// Operator - This is a utility class that provides an abstraction for the
|
|
/// common functionality between Instructions and ConstantExprs.
|
|
///
|
|
class Operator : public User {
|
|
private:
|
|
// Do not implement any of these. The Operator 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);
|
|
Operator();
|
|
~Operator();
|
|
|
|
public:
|
|
/// getOpcode - Return the opcode for this Instruction or ConstantExpr.
|
|
///
|
|
unsigned getOpcode() const {
|
|
if (const Instruction *I = dyn_cast<Instruction>(this))
|
|
return I->getOpcode();
|
|
return cast<ConstantExpr>(this)->getOpcode();
|
|
}
|
|
|
|
/// getOpcode - If V is an Instruction or ConstantExpr, return its
|
|
/// opcode. Otherwise return UserOp1.
|
|
///
|
|
static unsigned getOpcode(const Value *V) {
|
|
if (const Instruction *I = dyn_cast<Instruction>(V))
|
|
return I->getOpcode();
|
|
if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
|
|
return CE->getOpcode();
|
|
return Instruction::UserOp1;
|
|
}
|
|
|
|
static inline bool classof(const Operator *) { return true; }
|
|
static inline bool classof(const Instruction *) { return true; }
|
|
static inline bool classof(const ConstantExpr *) { return true; }
|
|
static inline bool classof(const Value *V) {
|
|
return isa<Instruction>(V) || isa<ConstantExpr>(V);
|
|
}
|
|
};
|
|
|
|
/// OverflowingBinaryOperator - Utility class for integer arithmetic operators
|
|
/// which may exhibit overflow - Add, Sub, and Mul. It does not include SDiv,
|
|
/// despite that operator having the potential for overflow.
|
|
///
|
|
class OverflowingBinaryOperator : public Operator {
|
|
public:
|
|
enum {
|
|
NoUnsignedWrap = (1 << 0),
|
|
NoSignedWrap = (1 << 1)
|
|
};
|
|
|
|
private:
|
|
~OverflowingBinaryOperator(); // do not implement
|
|
|
|
friend class BinaryOperator;
|
|
friend class ConstantExpr;
|
|
void setHasNoUnsignedWrap(bool B) {
|
|
SubclassOptionalData =
|
|
(SubclassOptionalData & ~NoUnsignedWrap) | (B * NoUnsignedWrap);
|
|
}
|
|
void setHasNoSignedWrap(bool B) {
|
|
SubclassOptionalData =
|
|
(SubclassOptionalData & ~NoSignedWrap) | (B * NoSignedWrap);
|
|
}
|
|
|
|
public:
|
|
/// hasNoUnsignedWrap - Test whether this operation is known to never
|
|
/// undergo unsigned overflow, aka the nuw property.
|
|
bool hasNoUnsignedWrap() const {
|
|
return SubclassOptionalData & NoUnsignedWrap;
|
|
}
|
|
|
|
/// hasNoSignedWrap - Test whether this operation is known to never
|
|
/// undergo signed overflow, aka the nsw property.
|
|
bool hasNoSignedWrap() const {
|
|
return (SubclassOptionalData & NoSignedWrap) != 0;
|
|
}
|
|
|
|
static inline bool classof(const OverflowingBinaryOperator *) { return true; }
|
|
static inline bool classof(const Instruction *I) {
|
|
return I->getOpcode() == Instruction::Add ||
|
|
I->getOpcode() == Instruction::Sub ||
|
|
I->getOpcode() == Instruction::Mul ||
|
|
I->getOpcode() == Instruction::Shl;
|
|
}
|
|
static inline bool classof(const ConstantExpr *CE) {
|
|
return CE->getOpcode() == Instruction::Add ||
|
|
CE->getOpcode() == Instruction::Sub ||
|
|
CE->getOpcode() == Instruction::Mul ||
|
|
CE->getOpcode() == Instruction::Shl;
|
|
}
|
|
static inline bool classof(const Value *V) {
|
|
return (isa<Instruction>(V) && classof(cast<Instruction>(V))) ||
|
|
(isa<ConstantExpr>(V) && classof(cast<ConstantExpr>(V)));
|
|
}
|
|
};
|
|
|
|
/// PossiblyExactOperator - A udiv or sdiv instruction, which can be marked as
|
|
/// "exact", indicating that no bits are destroyed.
|
|
class PossiblyExactOperator : public Operator {
|
|
public:
|
|
enum {
|
|
IsExact = (1 << 0)
|
|
};
|
|
|
|
private:
|
|
~PossiblyExactOperator(); // do not implement
|
|
|
|
friend class BinaryOperator;
|
|
friend class ConstantExpr;
|
|
void setIsExact(bool B) {
|
|
SubclassOptionalData = (SubclassOptionalData & ~IsExact) | (B * IsExact);
|
|
}
|
|
|
|
public:
|
|
/// isExact - Test whether this division is known to be exact, with
|
|
/// zero remainder.
|
|
bool isExact() const {
|
|
return SubclassOptionalData & IsExact;
|
|
}
|
|
|
|
static bool isPossiblyExactOpcode(unsigned OpC) {
|
|
return OpC == Instruction::SDiv ||
|
|
OpC == Instruction::UDiv ||
|
|
OpC == Instruction::AShr ||
|
|
OpC == Instruction::LShr;
|
|
}
|
|
static inline bool classof(const ConstantExpr *CE) {
|
|
return isPossiblyExactOpcode(CE->getOpcode());
|
|
}
|
|
static inline bool classof(const Instruction *I) {
|
|
return isPossiblyExactOpcode(I->getOpcode());
|
|
}
|
|
static inline bool classof(const Value *V) {
|
|
return (isa<Instruction>(V) && classof(cast<Instruction>(V))) ||
|
|
(isa<ConstantExpr>(V) && classof(cast<ConstantExpr>(V)));
|
|
}
|
|
};
|
|
|
|
/// FPMathOperator - Utility class for floating point operations which can have
|
|
/// information about relaxed accuracy requirements attached to them.
|
|
class FPMathOperator : public Operator {
|
|
private:
|
|
~FPMathOperator(); // do not implement
|
|
|
|
public:
|
|
|
|
/// \brief Get the maximum error permitted by this operation in ULPs. An
|
|
/// accuracy of 0.0 means that the operation should be performed with the
|
|
/// default precision.
|
|
float getFPAccuracy() const;
|
|
|
|
static inline bool classof(const FPMathOperator *) { return true; }
|
|
static inline bool classof(const Instruction *I) {
|
|
return I->getType()->isFPOrFPVectorTy();
|
|
}
|
|
static inline bool classof(const Value *V) {
|
|
return isa<Instruction>(V) && classof(cast<Instruction>(V));
|
|
}
|
|
};
|
|
|
|
|
|
/// ConcreteOperator - A helper template for defining operators for individual
|
|
/// opcodes.
|
|
template<typename SuperClass, unsigned Opc>
|
|
class ConcreteOperator : public SuperClass {
|
|
~ConcreteOperator(); // DO NOT IMPLEMENT
|
|
public:
|
|
static inline bool classof(const ConcreteOperator<SuperClass, Opc> *) {
|
|
return true;
|
|
}
|
|
static inline bool classof(const Instruction *I) {
|
|
return I->getOpcode() == Opc;
|
|
}
|
|
static inline bool classof(const ConstantExpr *CE) {
|
|
return CE->getOpcode() == Opc;
|
|
}
|
|
static inline bool classof(const Value *V) {
|
|
return (isa<Instruction>(V) && classof(cast<Instruction>(V))) ||
|
|
(isa<ConstantExpr>(V) && classof(cast<ConstantExpr>(V)));
|
|
}
|
|
};
|
|
|
|
class AddOperator
|
|
: public ConcreteOperator<OverflowingBinaryOperator, Instruction::Add> {
|
|
~AddOperator(); // DO NOT IMPLEMENT
|
|
};
|
|
class SubOperator
|
|
: public ConcreteOperator<OverflowingBinaryOperator, Instruction::Sub> {
|
|
~SubOperator(); // DO NOT IMPLEMENT
|
|
};
|
|
class MulOperator
|
|
: public ConcreteOperator<OverflowingBinaryOperator, Instruction::Mul> {
|
|
~MulOperator(); // DO NOT IMPLEMENT
|
|
};
|
|
class ShlOperator
|
|
: public ConcreteOperator<OverflowingBinaryOperator, Instruction::Shl> {
|
|
~ShlOperator(); // DO NOT IMPLEMENT
|
|
};
|
|
|
|
|
|
class SDivOperator
|
|
: public ConcreteOperator<PossiblyExactOperator, Instruction::SDiv> {
|
|
~SDivOperator(); // DO NOT IMPLEMENT
|
|
};
|
|
class UDivOperator
|
|
: public ConcreteOperator<PossiblyExactOperator, Instruction::UDiv> {
|
|
~UDivOperator(); // DO NOT IMPLEMENT
|
|
};
|
|
class AShrOperator
|
|
: public ConcreteOperator<PossiblyExactOperator, Instruction::AShr> {
|
|
~AShrOperator(); // DO NOT IMPLEMENT
|
|
};
|
|
class LShrOperator
|
|
: public ConcreteOperator<PossiblyExactOperator, Instruction::LShr> {
|
|
~LShrOperator(); // DO NOT IMPLEMENT
|
|
};
|
|
|
|
|
|
|
|
class GEPOperator
|
|
: public ConcreteOperator<Operator, Instruction::GetElementPtr> {
|
|
~GEPOperator(); // DO NOT IMPLEMENT
|
|
|
|
enum {
|
|
IsInBounds = (1 << 0)
|
|
};
|
|
|
|
friend class GetElementPtrInst;
|
|
friend class ConstantExpr;
|
|
void setIsInBounds(bool B) {
|
|
SubclassOptionalData =
|
|
(SubclassOptionalData & ~IsInBounds) | (B * IsInBounds);
|
|
}
|
|
|
|
public:
|
|
/// isInBounds - Test whether this is an inbounds GEP, as defined
|
|
/// by LangRef.html.
|
|
bool isInBounds() const {
|
|
return SubclassOptionalData & IsInBounds;
|
|
}
|
|
|
|
inline op_iterator idx_begin() { return op_begin()+1; }
|
|
inline const_op_iterator idx_begin() const { return op_begin()+1; }
|
|
inline op_iterator idx_end() { return op_end(); }
|
|
inline const_op_iterator idx_end() const { return op_end(); }
|
|
|
|
Value *getPointerOperand() {
|
|
return getOperand(0);
|
|
}
|
|
const Value *getPointerOperand() const {
|
|
return getOperand(0);
|
|
}
|
|
static unsigned getPointerOperandIndex() {
|
|
return 0U; // get index for modifying correct operand
|
|
}
|
|
|
|
/// getPointerOperandType - Method to return the pointer operand as a
|
|
/// PointerType.
|
|
Type *getPointerOperandType() const {
|
|
return getPointerOperand()->getType();
|
|
}
|
|
|
|
unsigned getNumIndices() const { // Note: always non-negative
|
|
return getNumOperands() - 1;
|
|
}
|
|
|
|
bool hasIndices() const {
|
|
return getNumOperands() > 1;
|
|
}
|
|
|
|
/// hasAllZeroIndices - Return true if all of the indices of this GEP are
|
|
/// zeros. If so, the result pointer and the first operand have the same
|
|
/// value, just potentially different types.
|
|
bool hasAllZeroIndices() const {
|
|
for (const_op_iterator I = idx_begin(), E = idx_end(); I != E; ++I) {
|
|
if (ConstantInt *C = dyn_cast<ConstantInt>(I))
|
|
if (C->isZero())
|
|
continue;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// hasAllConstantIndices - Return true if all of the indices of this GEP are
|
|
/// constant integers. If so, the result pointer and the first operand have
|
|
/// a constant offset between them.
|
|
bool hasAllConstantIndices() const {
|
|
for (const_op_iterator I = idx_begin(), E = idx_end(); I != E; ++I) {
|
|
if (!isa<ConstantInt>(I))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|