relation_kind lhs_op1_relation (const irange &lhs,
const irange &op1, const irange &op2,
relation_kind) const final override;
+ void update_bitmask (irange &r, const irange &lh,
+ const irange &rh) const final override;
private:
bool truncating_cast_p (const irange &inner, const irange &outer) const;
bool inside_domain_p (const wide_int &min, const wide_int &max,
return true;
}
- // Update the bitmask. Truncating casts are problematic unless
- // the conversion fits in the resulting outer type.
- irange_bitmask bm = inner.get_bitmask ();
- if (truncating_cast_p (inner, outer)
- && wi::rshift (bm.mask (),
- wi::uhwi (TYPE_PRECISION (outer.type ()),
- TYPE_PRECISION (inner.type ())),
- TYPE_SIGN (inner.type ())) != 0)
- return true;
- unsigned prec = TYPE_PRECISION (type);
- signop sign = TYPE_SIGN (inner.type ());
- bm = irange_bitmask (wide_int::from (bm.value (), prec, sign),
- wide_int::from (bm.mask (), prec, sign));
- r.update_bitmask (bm);
-
+ update_bitmask (r, inner, outer);
return true;
}
+void
+operator_cast::update_bitmask (irange &r, const irange &lh,
+ const irange &rh) const
+{
+ update_known_bitmask (r, CONVERT_EXPR, lh, rh);
+}
+
bool
operator_cast::op1_range (irange &r, tree type,
const irange &lhs,