Fast string construct stub (ia32 only for now).

src/ia32/stub-cache-ia32.cc

 // Copyright 2006-2009 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 239 matching lines @@
 
   // Cache miss: Fall-through and let caller handle the miss by
   // entering the runtime system.
   __ bind(&miss);
 }
 
 
 void StubCompiler::GenerateLoadGlobalFunctionPrototype(MacroAssembler* masm,
                                                        int index,
                                                        Register prototype) {
-  // Load the global or builtins object from the current context.
-  __ mov(prototype, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX)));
-  // Load the global context from the global or builtins object.
-  __ mov(prototype,
-         FieldOperand(prototype, GlobalObject::kGlobalContextOffset));
-  // Load the function from the global context.
-  __ mov(prototype, Operand(prototype, Context::SlotOffset(index)));
-  // Load the initial map.  The global functions all have initial maps.
-  __ mov(prototype,
-         FieldOperand(prototype, JSFunction::kPrototypeOrInitialMapOffset));
+  __ LoadGlobalFunction(index, prototype);
+  __ LoadGlobalFunctionInitialMap(prototype, prototype);
   // Load the prototype from the initial map.
   __ mov(prototype, FieldOperand(prototype, Map::kPrototypeOffset));
 }
 
 
 void StubCompiler::GenerateDirectLoadGlobalFunctionPrototype(
     MacroAssembler* masm, int index, Register prototype) {
   // Get the global function with the given index.
   JSFunction* function = JSFunction::cast(Top::global_context()->get(index));
   // Load its initial map. The global functions all have initial maps.
@@ skipping 2452 matching lines @@
   // Return the generated code.
   return GetCode();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32