Custom call IC for String.fromCharCode.

src/stub-cache.h

 // Copyright 2006-2008 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 594 matching lines @@
  private:
   Object* GetCode(PropertyType type, String* name);
 };
 
 
 // List of functions with custom constant call IC stubs.
 //
 // Installation of custom call generators for the selected builtins is
 // handled by the bootstrapper.
 //
-// Each entry has a name of a global function (lowercased), a name of
-// a builtin function on its instance prototype (the one the generator
-// is set for), and a name of a generator itself (used to build ids
-// and generator function names).
-#define CUSTOM_CALL_IC_GENERATORS(V)      \
-  V(array, push, ArrayPush)               \
-  V(array, pop, ArrayPop)                 \
-  V(string, charCodeAt, StringCharCodeAt) \
-  V(string, charAt, StringCharAt)
+// Each entry has a name of a global function (lowercased), a flag
+// controlling whether the generator is set on the function itself or
+// on its instance prototype, a name of a builtin function on the
+// function or its instance prototype (the one the generator is set
+// for), and a name of a generator itself (used to build ids and
+// generator function names).
+#define CUSTOM_CALL_IC_GENERATORS(V)                          \
+  V(array, INSTANCE_PROTOTYPE, push, ArrayPush)               \
+  V(array, INSTANCE_PROTOTYPE, pop, ArrayPop)                 \
+  V(string, INSTANCE_PROTOTYPE, charCodeAt, StringCharCodeAt) \
+  V(string, INSTANCE_PROTOTYPE, charAt, StringCharAt)         \
+  V(string, FUNCTION, fromCharCode, StringFromCharCode)
 
 
 class CallStubCompiler: public StubCompiler {
  public:
+  enum CustomGeneratorOwner {
+    FUNCTION,
+    INSTANCE_PROTOTYPE
+  };
+
   enum {
-#define DECLARE_CALL_GENERATOR_ID(ignored1, ignored2, name) \
+#define DECLARE_CALL_GENERATOR_ID(ignored1, ignore2, ignored3, name) \
     k##name##CallGenerator,
     CUSTOM_CALL_IC_GENERATORS(DECLARE_CALL_GENERATOR_ID)
 #undef DECLARE_CALL_GENERATOR_ID
     kNumCallGenerators
   };
 
   CallStubCompiler(int argc,
                    InLoopFlag in_loop,
                    Code::Kind kind,
                    InlineCacheHolderFlag cache_holder);
 
   Object* CompileCallField(JSObject* object,
                            JSObject* holder,
                            int index,
                            String* name);
   Object* CompileCallConstant(Object* object,
                               JSObject* holder,
                               JSFunction* function,
                               String* name,
                               CheckType check);
   Object* CompileCallInterceptor(JSObject* object,
                                  JSObject* holder,
                                  String* name);
   Object* CompileCallGlobal(JSObject* object,
                             GlobalObject* holder,
                             JSGlobalPropertyCell* cell,
                             JSFunction* function,
                             String* name);
 
-  // Compiles a custom call constant IC using the generator with given id.
+  // Compiles a custom call constant/global IC using the generator
+  // with given id. For constant calls cell is NULL.
   Object* CompileCustomCall(int generator_id,
                             Object* object,
                             JSObject* holder,
+                            JSGlobalPropertyCell* cell,
                             JSFunction* function,
-                            String* name,
-                            CheckType check);
+                            String* name);
 
-#define DECLARE_CALL_GENERATOR(ignored1, ignored2, name) \
-  Object* Compile##name##Call(Object* object,            \
-                              JSObject* holder,          \
-                              JSFunction* function,      \
-                              String* fname,             \
-                              CheckType check);
+#define DECLARE_CALL_GENERATOR(ignored1, ignored2, ignored3, name) \
+  Object* Compile##name##Call(Object* object,                      \
+                              JSObject* holder,                    \
+                              JSGlobalPropertyCell* cell,          \
+                              JSFunction* function,                \
+                              String* fname);
   CUSTOM_CALL_IC_GENERATORS(DECLARE_CALL_GENERATOR)
 #undef DECLARE_CALL_GENERATOR
 
  private:
   const ParameterCount arguments_;
   const InLoopFlag in_loop_;
   const Code::Kind kind_;
   const InlineCacheHolderFlag cache_holder_;
 
   const ParameterCount& arguments() { return arguments_; }
 
   Object* GetCode(PropertyType type, String* name);
 
   // Convenience function. Calls GetCode above passing
   // CONSTANT_FUNCTION type and the name of the given function.
   Object* GetCode(JSFunction* function);
 
   void GenerateNameCheck(String* name, Label* miss);
 
+  void GenerateGlobalReceiverCheck(JSObject* object,
+                                   JSObject* holder,
+                                   String* name,
+                                   Label* miss);
+
+  // Generates code to load the function from the cell checking that
+  // it still contains the same function.
+  void GenerateLoadFunctionFromCell(JSGlobalPropertyCell* cell,
+                                    JSFunction* function,
+                                    Label* miss);
+
   // Generates a jump to CallIC miss stub. Returns Failure if the jump cannot
   // be generated.
   Object* GenerateMissBranch();
 };
 
 
 class ConstructStubCompiler: public StubCompiler {
  public:
   explicit ConstructStubCompiler() {}
 
@@ skipping 48 matching lines @@
 
   JSFunction* constant_function_;
   bool is_simple_api_call_;
   FunctionTemplateInfo* expected_receiver_type_;
   CallHandlerInfo* api_call_info_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_