- /// hasNoUnsignedOverflow - Test whether this operation is known to never
- /// undergo unsigned overflow.
- bool hasNoUnsignedOverflow() 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);