Method hints_for_split

src/internal/hints.rs:195–208

Given a live range split, returns whether the left and right sides of the split still have a fixed register hint.

(
        &self,
        value: Value,
        seg: LiveRangeSegment,
        split_at: Inst,
    )

    /// Given a live range split, returns whether the left and right sides of
    /// the split still have a fixed register hint.
    pub fn hints_for_split(
        &self,
        value: Value,
        seg: LiveRangeSegment,
        split_at: Inst,
    ) -> (bool, bool) {
        let start = HintKey::incoming(value, seg.from.inst());
        let end = HintKey::outgoing(value, seg.to.round_to_next_inst().inst());
        let mid_key = HintKey::incoming(value, split_at);
        let mid = self.hints.partition_point(|hint| hint.key < mid_key);
        let first = mid != 0 && self.hints[mid - 1].key >= start;
        let second = self.hints.get(mid).is_some_and(|hint| hint.key <= end);
        (first, second)
    }
}