Make closures optimizable by Crankshaft compiler.

src/ia32/lithium-ia32.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 71 matching lines @@
 //   LConstant
 //     LConstantD
 //     LConstantI
 //     LConstantT
 //   LDeoptimize
 //   LFunctionLiteral
 //   LGlobalObject
 //   LGlobalReceiver
 //   LLabel
 //   LLayzBailout
+//   LLoadContextSlot
 //   LLoadGlobal
 //   LMaterializedLiteral
 //     LArrayLiteral
 //     LObjectLiteral
 //     LRegExpLiteral
 //   LOsrEntry
 //   LParameter
 //   LRegExpConstructResult
 //   LStackCheck
 //   LStoreKeyed
@@ skipping 116 matching lines @@
   V(IsSmiAndBranch)                             \
   V(JSArrayLength)                              \
   V(HasInstanceType)                            \
   V(HasInstanceTypeAndBranch)                   \
   V(HasCachedArrayIndex)                        \
   V(HasCachedArrayIndexAndBranch)               \
   V(ClassOfTest)                                \
   V(ClassOfTestAndBranch)                       \
   V(Label)                                      \
   V(LazyBailout)                                \
+  V(LoadContextSlot)                            \
   V(LoadElements)                               \
   V(LoadGlobal)                                 \
   V(LoadKeyedFastElement)                       \
   V(LoadKeyedGeneric)                           \
   V(LoadNamedField)                             \
   V(LoadNamedGeneric)                           \
   V(LoadFunctionPrototype)                      \
   V(ModI)                                       \
   V(MulI)                                       \
   V(NumberTagD)                                 \
@@ skipping 1097 matching lines @@
 
 class LStoreGlobal: public LUnaryOperation<1> {
  public:
   explicit LStoreGlobal(LOperand* value) : LUnaryOperation<1>(value) {}
 
   DECLARE_CONCRETE_INSTRUCTION(StoreGlobal, "store-global")
   DECLARE_HYDROGEN_ACCESSOR(StoreGlobal)
 };
 
 
+class LLoadContextSlot: public LTemplateInstruction<1> {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(LoadContextSlot, "load-context-slot")
+  DECLARE_HYDROGEN_ACCESSOR(LoadContextSlot)
+
+  int context_chain_length() const {
+    return hydrogen()->context_chain_length();
+  }
+  int slot_index() const { return hydrogen()->slot_index(); }
+
+  virtual void PrintDataTo(StringStream* stream);
+};
+
+
 class LPushArgument: public LUnaryOperation<1> {
  public:
   explicit LPushArgument(LOperand* argument) : LUnaryOperation<1>(argument) {}
 
   DECLARE_CONCRETE_INSTRUCTION(PushArgument, "push-argument")
 };
 
 
 class LGlobalObject: public LTemplateInstruction<1> {
  public:
@@ skipping 785 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_LITHIUM_IA32_H_