Basic implementation of incremental marking.

src/ia32/lithium-ia32.h

Index: src/ia32/lithium-ia32.h
diff --git a/src/ia32/lithium-ia32.h b/src/ia32/lithium-ia32.h
index f1b9ffc997bc7fb36feb13bd1e9870a7c9c75afd..52f8e584f743ffb7dfb38b4b6c1e0819ace5c451 100644
--- a/src/ia32/lithium-ia32.h
+++ b/src/ia32/lithium-ia32.h
@@ -1265,14 +1265,23 @@ class LLoadGlobal: public LTemplateInstruction<1, 0, 0> {
 };
 
 
-class LStoreGlobal: public LTemplateInstruction<0, 1, 0> {
+class LStoreGlobal: public LTemplateInstruction<0, 1, 2> {
  public:
-  explicit LStoreGlobal(LOperand* value) {
+  explicit LStoreGlobal(LOperand* value, LOperand* temp1, LOperand* temp2) {
     inputs_[0] = value;
+    temps_[0] = temp1;
+    temps_[1] = temp2;
   }
 
+  LOperand* temp1() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreGlobal, "store-global")
   DECLARE_HYDROGEN_ACCESSOR(StoreGlobal)
+
+ private:
+  LOperand* temp1_;
+  LOperand* temp2_;
 };