Support inlining at call-sites with mismatched number of arguments.

src/hydrogen-instructions.h

 // 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 1322 matching lines @@
   DECLARE_CONCRETE_INSTRUCTION(StackCheck)
 
  private:
   Type type_;
 };
 
 
 class HEnterInlined: public HTemplateInstruction<0> {
  public:
   HEnterInlined(Handle<JSFunction> closure,
+                int arguments_count,
                 FunctionLiteral* function,
                 CallKind call_kind)
       : closure_(closure),
+        arguments_count_(arguments_count),
         function_(function),
         call_kind_(call_kind) {
   }
 
   virtual void PrintDataTo(StringStream* stream);
 
   Handle<JSFunction> closure() const { return closure_; }
+  int arguments_count() const { return arguments_count_; }
   FunctionLiteral* function() const { return function_; }
   CallKind call_kind() const { return call_kind_; }
 
   virtual Representation RequiredInputRepresentation(int index) {
     return Representation::None();
   }
 
   DECLARE_CONCRETE_INSTRUCTION(EnterInlined)
 
  private:
   Handle<JSFunction> closure_;
+  int arguments_count_;
   FunctionLiteral* function_;
   CallKind call_kind_;
 };
 
 
 class HLeaveInlined: public HTemplateInstruction<0> {
  public:
   HLeaveInlined() {}
 
   virtual Representation RequiredInputRepresentation(int index) {
@@ skipping 3177 matching lines @@
 
   DECLARE_CONCRETE_INSTRUCTION(In)
 };
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_