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.
///
}
static inline bool classof(const Operator *) { return true; }
- static inline bool classof(const Instruction *I) { return true; }
- static inline bool classof(const ConstantExpr *I) { 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);
}
///
class OverflowingBinaryOperator : public Operator {
public:
- /// hasNoSignedOverflow - Test whether this operation is known to never
- /// undergo signed overflow.
- bool hasNoSignedOverflow() const {
- return SubclassOptionalData & (1 << 0);
+ 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 setHasNoSignedOverflow(bool B) {
- SubclassOptionalData = (SubclassOptionalData & ~(1 << 0)) | (B << 0);
+ void setHasNoSignedWrap(bool B) {
+ SubclassOptionalData =
+ (SubclassOptionalData & ~NoSignedWrap) | (B * NoSignedWrap);
}
- /// hasNoUnsignedOverflow - Test whether this operation is known to never
- /// undergo unsigned overflow.
- bool hasNoUnsignedOverflow() const {
- return SubclassOptionalData & (1 << 1);
+public:
+ /// hasNoUnsignedWrap - Test whether this operation is known to never
+ /// undergo unsigned overflow, aka the nuw property.
+ bool hasNoUnsignedWrap() const {
+ return SubclassOptionalData & NoUnsignedWrap;
}
- void setHasNoUnsignedOverflow(bool B) {
- SubclassOptionalData = (SubclassOptionalData & ~(1 << 1)) | (B << 1);
+
+ /// hasNoSignedWrap - Test whether this operation is known to never
+ /// undergo signed overflow, aka the nsw property.
+ bool hasNoSignedWrap() const {
+ return SubclassOptionalData & NoSignedWrap;
}
static inline bool classof(const OverflowingBinaryOperator *) { return true; }
/// AddOperator - Utility class for integer addition operators.
///
class AddOperator : public OverflowingBinaryOperator {
+ ~AddOperator(); // do not implement
public:
static inline bool classof(const AddOperator *) { return true; }
static inline bool classof(const Instruction *I) {
/// SubOperator - Utility class for integer subtraction operators.
///
class SubOperator : public OverflowingBinaryOperator {
+ ~SubOperator(); // do not implement
public:
static inline bool classof(const SubOperator *) { return true; }
static inline bool classof(const Instruction *I) {
/// MulOperator - Utility class for integer multiplication operators.
///
class MulOperator : public OverflowingBinaryOperator {
+ ~MulOperator(); // do not implement
public:
static inline bool classof(const MulOperator *) { return true; }
static inline bool classof(const Instruction *I) {
/// SDivOperator - An Operator with opcode Instruction::SDiv.
///
class SDivOperator : public Operator {
+public:
+ enum {
+ IsExact = (1 << 0)
+ };
+
+private:
+ ~SDivOperator(); // 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 & (1 << 0);
- }
- void setIsExact(bool B) {
- SubclassOptionalData = (SubclassOptionalData & ~(1 << 0)) | (B << 0);
+ return SubclassOptionalData & IsExact;
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
};
class GEPOperator : public Operator {
+ enum {
+ IsInBounds = (1 << 0)
+ };
+
+ ~GEPOperator(); // do not implement
+
+ 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(); }
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;
+ }
+
+
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const GEPOperator *) { return true; }
static inline bool classof(const GetElementPtrInst *) { return true; }
return I->getOpcode() == Instruction::GetElementPtr;
}
static inline bool classof(const Value *V) {
- return isa<GetElementPtrInst>(V) ||
+ return (isa<Instruction>(V) && classof(cast<Instruction>(V))) ||
(isa<ConstantExpr>(V) && classof(cast<ConstantExpr>(V)));
}
};