Optimize bitops with non-Smi inputs. Instead of converting both inputs...

src/codegen.h

 // Copyright 2006-2008 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 238 matching lines @@
  public:
   explicit UnarySubStub(bool overwrite)
       : overwrite_(overwrite) { }
 
  private:
   bool overwrite_;
   Major MajorKey() { return UnarySub; }
   int MinorKey() { return overwrite_ ? 1 : 0; }
   void Generate(MacroAssembler* masm);
 
-  const char* GetName() { return "UnarySubStub"; }
+  const char* GetName() {
+    return overwrite_ ? "UnarySubStub_Overwrite" : "UnarySubStub_Alloc";
+  }
 };
 
 
 class CompareStub: public CodeStub {
  public:
   CompareStub(Condition cc, bool strict) : cc_(cc), strict_(strict) { }
 
   void Generate(MacroAssembler* masm);
 
  private:
@@ skipping 148 matching lines @@
     PrintF("ArgumentsAccessStub (type %d)\n", type_);
   }
 #endif
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODEGEN_H_