CodeStubAssembler can generate code for builtins

src/compiler/raw-machine-assembler.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 #define V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 
 #include "src/assembler.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 604 matching lines @@
   Node* CallCFunction8(MachineType return_type, MachineType arg0_type,
                        MachineType arg1_type, MachineType arg2_type,
                        MachineType arg3_type, MachineType arg4_type,
                        MachineType arg5_type, MachineType arg6_type,
                        MachineType arg7_type, Node* function, Node* arg0,
                        Node* arg1, Node* arg2, Node* arg3, Node* arg4,
                        Node* arg5, Node* arg6, Node* arg7);
 
   // Tail call the given call descriptor and the given arguments.
   Node* TailCallN(CallDescriptor* call_descriptor, Node* function, Node** args);
+  // Tail call to a runtime function with zero arguments.
+  Node* TailCallRuntime0(Runtime::FunctionId function, Node* context);
   // Tail call to a runtime function with one argument.
   Node* TailCallRuntime1(Runtime::FunctionId function, Node* arg0,
                          Node* context);
   // Tail call to a runtime function with two arguments.
   Node* TailCallRuntime2(Runtime::FunctionId function, Node* arg1, Node* arg2,
                          Node* context);
   // Tail call to a runtime function with three arguments.
   Node* TailCallRuntime3(Runtime::FunctionId function, Node* arg1, Node* arg2,
                          Node* arg3, Node* context);
   // Tail call to a runtime function with four arguments.
@@ skipping 82 matching lines @@
   bool bound_;
   friend class RawMachineAssembler;
   DISALLOW_COPY_AND_ASSIGN(RawMachineLabel);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_