Use an efficient graph constant in CodeStubGraphBuilderBase::BuildGraph().

src/code-stubs-hydrogen.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 114 matching lines @@
   }
 
   HInstruction* stack_parameter_count;
   if (descriptor_->stack_parameter_count_ != NULL) {
     ASSERT(descriptor_->environment_length() == (param_count + 1));
     stack_parameter_count = new(zone) HParameter(param_count,
         HParameter::REGISTER_PARAMETER);
     // it's essential to bind this value to the environment in case of deopt
     start_environment->Bind(param_count, stack_parameter_count);
     AddInstruction(stack_parameter_count);
+    arguments_length_ = stack_parameter_count;
   } else {
     ASSERT(descriptor_->environment_length() == param_count);
-    stack_parameter_count = AddInstruction(new(zone)
-        HConstant(-1, Representation::Integer32()));
+    stack_parameter_count = graph()->GetConstantMinus1();
+    arguments_length_ = graph()->GetConstant0();
   }
 
-  arguments_length_ = stack_parameter_count;
-
   context_ = new(zone) HContext();
   AddInstruction(context_);
   start_environment->BindContext(context_);
 
   AddSimulate(BailoutId::StubEntry());
 
   HValue* return_value = BuildCodeStub();
   HReturn* hreturn_instruction = new(zone) HReturn(return_value,
                                                    context_,
                                                    stack_parameter_count);
@@ skipping 223 matching lines @@
 }
 
 
 Handle<Code> ArrayNArgumentsConstructorStub::GenerateCode() {
   CodeStubGraphBuilder<ArrayNArgumentsConstructorStub> builder(this);
   LChunk* chunk = OptimizeGraph(builder.CreateGraph());
   return chunk->Codegen(Code::COMPILED_STUB);
 }
 
 } }  // namespace v8::internal