[string] Widen StringIndexOf fast path

src/compiler/code-assembler.h

 // Copyright 2015 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_CODE_ASSEMBLER_H_
 #define V8_COMPILER_CODE_ASSEMBLER_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 403 matching lines @@
   // Call to a C function with two arguments.
   Node* CallCFunction2(MachineType return_type, MachineType arg0_type,
                        MachineType arg1_type, Node* function, Node* arg0,
                        Node* arg1);
 
   // Call to a C function with three arguments.
   Node* CallCFunction3(MachineType return_type, MachineType arg0_type,
                        MachineType arg1_type, MachineType arg2_type,
                        Node* function, Node* arg0, Node* arg1, Node* arg2);
 
+  // Call to a C function with six arguments.
+  Node* CallCFunction6(MachineType return_type, MachineType arg0_type,
+                       MachineType arg1_type, MachineType arg2_type,
+                       MachineType arg3_type, MachineType arg4_type,
+                       MachineType arg5_type, Node* function, Node* arg0,
+                       Node* arg1, Node* arg2, Node* arg3, Node* arg4,
+                       Node* arg5);
+
   // Exception handling support.
   void GotoIfException(Node* node, Label* if_exception,
                        Variable* exception_var = nullptr);
 
   // Helpers which delegate to RawMachineAssembler.
   Factory* factory() const;
   Isolate* isolate() const;
   Zone* zone() const;
 
   CodeAssemblerState* state() { return state_; }
@@ skipping 150 matching lines @@
   CodeAssemblerCallback call_epilogue_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeAssemblerState);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_ASSEMBLER_H_