arrange to create prototypes for generators

src/ia32/lithium-codegen-ia32.cc

 // Copyright 2012 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 5911 matching lines @@
   }
 }
 
 
 void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) {
   ASSERT(ToRegister(instr->context()).is(esi));
   // 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) {
+  if (!pretenure &&
+      shared_info->num_literals() == 0 &&
+      !shared_info->is_generator()) {
     FastNewClosureStub stub(shared_info->language_mode());
     __ push(Immediate(shared_info));
     CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr);
   } else {
     __ push(esi);
     __ push(Immediate(shared_info));
     __ push(Immediate(pretenure
                       ? factory()->true_value()
                       : factory()->false_value()));
     CallRuntime(Runtime::kNewClosure, 3, instr);
@@ skipping 356 matching lines @@
                               FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32