X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FADT%2FIntEqClasses.h;h=8e75c48e37645c24b894a92dae4658cce70a2156;hb=b2eb7406719a0cd70489a1229af643b04882b046;hp=00d042695a5ab6d76ae76c6979b2bb1676b724aa;hpb=2a6899c5391a9aada02686dee29f9b56218ed1d3;p=oota-llvm.git

diff --git a/include/llvm/ADT/IntEqClasses.h b/include/llvm/ADT/IntEqClasses.h
index 00d042695a5..8e75c48e376 100644
--- a/include/llvm/ADT/IntEqClasses.h
+++ b/include/llvm/ADT/IntEqClasses.h
@@ -39,13 +39,20 @@ class IntEqClasses {
 
 public:
   /// IntEqClasses - Create an equivalence class mapping for 0 .. N-1.
-  IntEqClasses(unsigned N) : NumClasses(0) { grow(N); }
+  IntEqClasses(unsigned N = 0) : NumClasses(0) { grow(N); }
 
   /// grow - Increase capacity to hold 0 .. N-1, putting new integers in unique
   /// equivalence classes.
   /// This requires an uncompressed map.
   void grow(unsigned N);
 
+  /// clear - Clear all classes so that grow() will assign a unique class to
+  /// every integer.
+  void clear() {
+    EC.clear();
+    NumClasses = 0;
+  }
+
   /// join - Join the equivalence classes of a and b. After joining classes,
   /// findLeader(a) == findLeader(b).
   /// This requires an uncompressed map.