Merge experimental/gc branch to the bleeding_edge.

src/lithium.h

Index: src/lithium.h
===================================================================
--- src/lithium.h	(revision 9327)
+++ src/lithium.h	(working copy)
@@ -407,9 +407,18 @@
 class LPointerMap: public ZoneObject {
  public:
   explicit LPointerMap(int position)
-      : pointer_operands_(8), position_(position), lithium_position_(-1) { }
+      : pointer_operands_(8),
+        untagged_operands_(0),
+        position_(position),
+        lithium_position_(-1) { }
 
-  const ZoneList<LOperand*>* operands() const { return &pointer_operands_; }
+  const ZoneList<LOperand*>* GetNormalizedOperands() {
+    for (int i = 0; i < untagged_operands_.length(); ++i) {
+      RemovePointer(untagged_operands_[i]);
+    }
+    untagged_operands_.Clear();
+    return &pointer_operands_;
+  }
   int position() const { return position_; }
   int lithium_position() const { return lithium_position_; }
 
@@ -419,10 +428,13 @@
   }
 
   void RecordPointer(LOperand* op);
+  void RemovePointer(LOperand* op);
+  void RecordUntagged(LOperand* op);
   void PrintTo(StringStream* stream);
 
  private:
   ZoneList<LOperand*> pointer_operands_;
+  ZoneList<LOperand*> untagged_operands_;
   int position_;
   int lithium_position_;
 };