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

src/code-stubs-hydrogen.cc

Index: src/code-stubs-hydrogen.cc
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index ab2fb08a44c12e85491f7b67fd527b802fc2a0f7..bb8bfe3fdc4447e90683ffc8df0cf77514ae1cd5 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -132,14 +132,13 @@ bool CodeStubGraphBuilderBase::BuildGraph() {
     // 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_);