Increase coverage of global loads in optimized code

src/ia32/lithium-ia32.h

Index: src/ia32/lithium-ia32.h
===================================================================
--- src/ia32/lithium-ia32.h	(revision 7468)
+++ src/ia32/lithium-ia32.h	(working copy)
@@ -121,7 +121,8 @@
   V(LoadElements)                               \
   V(LoadExternalArrayPointer)                   \
   V(LoadFunctionPrototype)                      \
-  V(LoadGlobal)                                 \
+  V(LoadGlobalCell)                             \
+  V(LoadGlobalGeneric)                          \
   V(LoadKeyedFastElement)                       \
   V(LoadKeyedGeneric)                           \
   V(LoadKeyedSpecializedArrayElement)           \
@@ -1292,13 +1293,30 @@
 };
 
 
-class LLoadGlobal: public LTemplateInstruction<1, 0, 0> {
+class LLoadGlobalCell: public LTemplateInstruction<1, 0, 0> {
  public:
-  DECLARE_CONCRETE_INSTRUCTION(LoadGlobal, "load-global")
-  DECLARE_HYDROGEN_ACCESSOR(LoadGlobal)
+  DECLARE_CONCRETE_INSTRUCTION(LoadGlobalCell, "load-global-cell")
+  DECLARE_HYDROGEN_ACCESSOR(LoadGlobalCell)
 };
 
 
+class LLoadGlobalGeneric: public LTemplateInstruction<1, 2, 0> {
+ public:
+  LLoadGlobalGeneric(LOperand* context, LOperand* global_object) {
+    inputs_[0] = context;
+    inputs_[1] = global_object;
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadGlobalGeneric, "load-global-generic")
+  DECLARE_HYDROGEN_ACCESSOR(LoadGlobalGeneric)
+
+  LOperand* context() { return inputs_[0]; }
+  LOperand* global_object() { return inputs_[1]; }
+  Handle<Object> name() const { return hydrogen()->name(); }
+  bool for_typeof() const { return hydrogen()->for_typeof(); }
+};
+
+
 class LStoreGlobal: public LTemplateInstruction<0, 1, 0> {
  public:
   explicit LStoreGlobal(LOperand* value) {