[turbofan] Add support for tail-calling a runtime function with 6 arguments.

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 726 matching lines @@
                          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.
   Node* TailCallRuntime4(Runtime::FunctionId function, Node* arg1, Node* arg2,
                          Node* arg3, Node* arg4, Node* context);
   // Tail call to a runtime function with five arguments.
   Node* TailCallRuntime5(Runtime::FunctionId function, Node* arg1, Node* arg2,
                          Node* arg3, Node* arg4, Node* arg5, Node* context);
+  // Tail call to a runtime function with six arguments.
+  Node* TailCallRuntime6(Runtime::FunctionId function, Node* arg1, Node* arg2,
+                         Node* arg3, Node* arg4, Node* arg5, Node* arg6,
+                         Node* context);
 
   // ===========================================================================
   // The following utility methods deal with control flow, hence might switch
   // the current basic block or create new basic blocks for labels.
 
   // Control flow.
   void Goto(RawMachineLabel* label);
   void Branch(Node* condition, RawMachineLabel* true_val,
               RawMachineLabel* false_val);
   void Switch(Node* index, RawMachineLabel* default_label,
@@ skipping 79 matching lines @@
   bool deferred_;
   friend class RawMachineAssembler;
   DISALLOW_COPY_AND_ASSIGN(RawMachineLabel);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_