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.
/// 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 & (1 << 0);
- }
- void setHasNoUnsignedWrap(bool B) {
- SubclassOptionalData = (SubclassOptionalData & ~(1 << 0)) | (B << 0);
+ return SubclassOptionalData & NoUnsignedWrap;
}
/// hasNoSignedWrap - Test whether this operation is known to never
/// undergo signed overflow, aka the nsw property.
bool hasNoSignedWrap() const {
- return SubclassOptionalData & (1 << 1);
- }
- void setHasNoSignedWrap(bool B) {
- SubclassOptionalData = (SubclassOptionalData & ~(1 << 1)) | (B << 1);
+ return SubclassOptionalData & NoSignedWrap;
}
static inline bool classof(const OverflowingBinaryOperator *) { return true; }
/// 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 & (1 << 0);
- }
- void setIsInBounds(bool B) {
- SubclassOptionalData = (SubclassOptionalData & ~(1 << 0)) | (B << 0);
+ return SubclassOptionalData & IsInBounds;
}
inline op_iterator idx_begin() { return op_begin()+1; }