Add optimized compiler support for generic global loads....

src/ia32/lithium-ia32.h

Index: src/ia32/lithium-ia32.h
===================================================================
--- src/ia32/lithium-ia32.h	(revision 5936)
+++ src/ia32/lithium-ia32.h	(working copy)
@@ -88,6 +88,7 @@
 //   LLabel
 //   LLayzBailout
 //   LLoadGlobal
+//   LLoadGlobalGeneric
 //   LMaterializedLiteral
 //     LArrayLiteral
 //     LObjectLiteral
@@ -217,6 +218,7 @@
   V(LazyBailout)                                \
   V(LoadElements)                               \
   V(LoadGlobal)                                 \
+  V(LoadGlobalGeneric)                          \
   V(LoadKeyedFastElement)                       \
   V(LoadKeyedGeneric)                           \
   V(LoadNamedField)                             \
@@ -1260,6 +1262,13 @@
 };
 
 
+class LLoadGlobalGeneric: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(LoadGlobalGeneric, "load-global-generic")
+  DECLARE_HYDROGEN_ACCESSOR(LoadGlobalGeneric)
+};
+
+
 class LStoreGlobal: public LUnaryOperation {
  public:
   explicit LStoreGlobal(LOperand* value) : LUnaryOperation(value) {}