/// MachineLoopRange - Range information for a single loop.
class MachineLoopRange {
friend class MachineLoopRanges;
- typedef IntervalMap<SlotIndex, unsigned, 4> RangeMap;
- typedef RangeMap::Allocator Allocator;
+public:
+ typedef IntervalMap<SlotIndex, unsigned, 4> Map;
+ typedef Map::Allocator Allocator;
+
+private:
/// The mapped loop.
const MachineLoop *const Loop;
/// Map intervals to a bit mask.
/// Bit 0 = inside loop block.
- RangeMap Intervals;
+ Map Intervals;
+
+ /// Loop area as measured by SlotIndex::distance.
+ unsigned Area;
/// Create a MachineLoopRange, only accessible to MachineLoopRanges.
MachineLoopRange(const MachineLoop*, Allocator&, SlotIndexes&);
public:
+ /// getLoop - Return the mapped machine loop.
+ const MachineLoop *getLoop() const { return Loop; }
+
/// overlaps - Return true if this loop overlaps the given range of machine
/// inteructions.
bool overlaps(SlotIndex Start, SlotIndex Stop);
+ /// getNumber - Return the loop number. This is the same as the number of the
+ /// header block.
+ unsigned getNumber() const;
+
+ /// getArea - Return the loop area. This number is approximately proportional
+ /// to the number of instructions in the loop.
+ unsigned getArea() const { return Area; }
+
+ /// getMap - Allow public read-only access for IntervalMapOverlaps.
+ const Map &getMap() { return Intervals; }
+
/// print - Print loop ranges on OS.
void print(raw_ostream&) const;
+
+ /// byNumber - Comparator for array_pod_sort that sorts a list of
+ /// MachineLoopRange pointers by number.
+ static int byNumber(const void*, const void*);
+
+ /// byAreaDesc - Comparator for array_pod_sort that sorts a list of
+ /// MachineLoopRange pointers by descending area, then by number.
+ static int byAreaDesc(const void*, const void*);
};
raw_ostream &operator<<(raw_ostream&, const MachineLoopRange&);