arrange to create prototypes for generators

src/x64/lithium-codegen-x64.cc

 // Copyright 2013 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 5447 matching lines @@
   }
 }
 
 
 void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) {
   // Use the fast case closure allocation code that allocates in new
   // space for nested functions that don't need literals cloning.
   Handle<SharedFunctionInfo> shared_info = instr->shared_info();
   bool pretenure = instr->hydrogen()->pretenure();
   if (!pretenure && shared_info->num_literals() == 0) {
-    FastNewClosureStub stub(shared_info->language_mode());
+    FastNewClosureStub stub(shared_info->language_mode(),
+                            shared_info->is_generator());
     __ Push(shared_info);
     CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr);
   } else {
     __ push(rsi);
     __ Push(shared_info);
     __ PushRoot(pretenure ?
                 Heap::kTrueValueRootIndex :
                 Heap::kFalseValueRootIndex);
     CallRuntime(Runtime::kNewClosure, 3, instr);
   }
@@ skipping 368 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64