| 802 | } |
| 803 | |
| 804 | uint64_t VectorHasher::enableValueRange( |
| 805 | uint64_t multiplier, |
| 806 | int32_t reservePct) { |
| 807 | multiplier_ = multiplier; |
| 808 | BOLT_CHECK_LE(0, reservePct); |
| 809 | BOLT_CHECK(hasRange_); |
| 810 | extendRange(type_->kind(), reservePct, min_, max_); |
| 811 | isRange_ = true; |
| 812 | // No overflow because max range is under 63 bits. |
| 813 | if (typeKind_ == TypeKind::BOOLEAN) { |
| 814 | rangeSize_ = 3; |
| 815 | } else { |
| 816 | rangeSize_ = (max_ - min_) + 2; |
| 817 | } |
| 818 | uint64_t result; |
| 819 | if (__builtin_mul_overflow(multiplier_, rangeSize_, &result)) { |
| 820 | return kRangeTooLarge; |
| 821 | } |
| 822 | return result; |
| 823 | } |
| 824 | |
| 825 | void VectorHasher::copyStatsFrom(const VectorHasher& other) { |
| 826 | hasRange_ = other.hasRange_; |