Refactor the code that checks that all operands of a node are UNDEFs.

[oota-llvm.git] / include / llvm / CodeGen / MachineLoopRanges.h

diff --git a/include/llvm/CodeGen/MachineLoopRanges.h b/include/llvm/CodeGen/MachineLoopRanges.h
index 730b729dba72cb4b06e8557322b13d315a3fef9f..6a30e8b53c09855f52cd41506d1377caba7c2043 100644 (file)
--- a/include/llvm/CodeGen/MachineLoopRanges.h
+++ b/include/llvm/CodeGen/MachineLoopRanges.h
@@ -42,19 +42,41 @@ private:
   /// Bit 0 = inside loop block.
   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&);