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

src/full-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 195 matching lines @@
   Visit(expr->value());
 }
 
 
 void BreakableStatementChecker::VisitThrow(Throw* expr) {
   // Throw is breakable if the expression is.
   Visit(expr->exception());
 }
 
 
-void BreakableStatementChecker::VisitIncrementOperation(
-    IncrementOperation* expr) {
-  UNREACHABLE();
-}
-
-
 void BreakableStatementChecker::VisitProperty(Property* expr) {
   // Property load is breakable.
   is_breakable_ = true;
 }
 
 
 void BreakableStatementChecker::VisitCall(Call* expr) {
   // Function calls both through IC and call stub are breakable.
   is_breakable_ = true;
 }
@@ skipping 1118 matching lines @@
 
 
 void FullCodeGenerator::VisitThrow(Throw* expr) {
   Comment cmnt(masm_, "[ Throw");
   VisitForStackValue(expr->exception());
   __ CallRuntime(Runtime::kThrow, 1);
   // Never returns here.
 }
 
 
-void FullCodeGenerator::VisitIncrementOperation(IncrementOperation* expr) {
-  UNREACHABLE();
-}
-
-
 int FullCodeGenerator::TryFinally::Exit(int stack_depth) {
   // The macros used here must preserve the result register.
   __ Drop(stack_depth);
   __ PopTryHandler();
   __ Call(finally_entry_);
   return 0;
 }
 
 
 int FullCodeGenerator::TryCatch::Exit(int stack_depth) {
   // The macros used here must preserve the result register.
   __ Drop(stack_depth);
   __ PopTryHandler();
   return 0;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal