Give the binary op stubs better names to make profiles more informative.

src/x64/codegen-x64.h

 // Copyright 2009 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 652 matching lines @@
 
 class GenericBinaryOpStub: public CodeStub {
  public:
   GenericBinaryOpStub(Token::Value op,
                       OverwriteMode mode,
                       GenericBinaryFlags flags)
       : op_(op),
         mode_(mode),
         flags_(flags),
         args_in_registers_(false),
-        args_reversed_(false) {
+        args_reversed_(false),
+        name_(NULL) {
     use_sse3_ = CpuFeatures::IsSupported(SSE3);
     ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
   }
 
   // Generate code to call the stub with the supplied arguments. This will add
   // code at the call site to prepare arguments either in registers or on the
   // stack together with the actual call.
   void GenerateCall(MacroAssembler* masm, Register left, Register right);
   void GenerateCall(MacroAssembler* masm, Register left, Smi* right);
   void GenerateCall(MacroAssembler* masm, Smi* left, Register right);
 
  private:
   Token::Value op_;
   OverwriteMode mode_;
   GenericBinaryFlags flags_;
   bool args_in_registers_;  // Arguments passed in registers not on the stack.
   bool args_reversed_;  // Left and right argument are swapped.
   bool use_sse3_;
+  char* name_;
 
   const char* GetName();
 
 #ifdef DEBUG
   void Print() {
     PrintF("GenericBinaryOpStub (op %s), "
            "(mode %d, flags %d, registers %d, reversed %d)\n",
            Token::String(op_),
            static_cast<int>(mode_),
            static_cast<int>(flags_),
@@ skipping 69 matching lines @@
                               bool ascii);
 
   // Should the stub check whether arguments are strings?
   bool string_check_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_