Remove unnecessary AST node for ++ and -- operations.

src/codegen.cc

 // Copyright 2010 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 340 matching lines @@
       }
     }
   }
 
   // Invoke the platform-dependent code generator to do the actual
   // declaration the global variables and functions.
   DeclareGlobals(array);
 }
 
 
-void CodeGenerator::VisitIncrementOperation(IncrementOperation* expr) {
-  UNREACHABLE();
-}
-
-
 // Lookup table for code generators for special runtime calls which are
 // generated inline.
 #define INLINE_FUNCTION_GENERATOR_ADDRESS(Name, argc, ressize)          \
     &CodeGenerator::Generate##Name,
 
 const CodeGenerator::InlineFunctionGenerator
     CodeGenerator::kInlineFunctionGenerators[] = {
         INLINE_FUNCTION_LIST(INLINE_FUNCTION_GENERATOR_ADDRESS)
         INLINE_RUNTIME_FUNCTION_LIST(INLINE_FUNCTION_GENERATOR_ADDRESS)
 };
@@ skipping 120 matching lines @@
   int result = save_doubles_ ? 1 : 0;
 #ifdef _WIN64
   return result | ((result_size_ == 1) ? 0 : 2);
 #else
   return result;
 #endif
 }
 
 
 } }  // namespace v8::internal