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

src/prettyprinter.cc

 // 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 358 matching lines @@
 }
 
 
 void PrettyPrinter::VisitUnaryOperation(UnaryOperation* node) {
   Print("(%s", Token::String(node->op()));
   Visit(node->expression());
   Print(")");
 }
 
 
-void PrettyPrinter::VisitIncrementOperation(IncrementOperation* node) {
-  UNREACHABLE();
-}
-
-
 void PrettyPrinter::VisitCountOperation(CountOperation* node) {
   Print("(");
   if (node->is_prefix()) Print("%s", Token::String(node->op()));
   Visit(node->expression());
   if (node->is_postfix()) Print("%s", Token::String(node->op()));
   Print(")");
 }
 
 
 void PrettyPrinter::VisitBinaryOperation(BinaryOperation* node) {
@@ skipping 655 matching lines @@
   IndentedScope indent(this);
   PrintArguments(node->arguments());
 }
 
 
 void AstPrinter::VisitUnaryOperation(UnaryOperation* node) {
   PrintIndentedVisit(Token::Name(node->op()), node->expression());
 }
 
 
-void AstPrinter::VisitIncrementOperation(IncrementOperation* node) {
-  UNREACHABLE();
-}
-
-
 void AstPrinter::VisitCountOperation(CountOperation* node) {
   EmbeddedVector<char, 128> buf;
   if (node->type()->IsKnown()) {
     OS::SNPrintF(buf, "%s %s (type = %s)",
                  (node->is_prefix() ? "PRE" : "POST"),
                  Token::Name(node->op()),
                  StaticType::Type2String(node->type()));
   } else {
     OS::SNPrintF(buf, "%s %s", (node->is_prefix() ? "PRE" : "POST"),
                  Token::Name(node->op()));
@@ skipping 380 matching lines @@
 void JsonAstBuilder::VisitUnaryOperation(UnaryOperation* expr) {
   TagScope tag(this, "UnaryOperation");
   {
     AttributesScope attributes(this);
     AddAttribute("op", Token::Name(expr->op()));
   }
   Visit(expr->expression());
 }
 
 
-void JsonAstBuilder::VisitIncrementOperation(IncrementOperation* expr) {
-  UNREACHABLE();
-}
-
-
 void JsonAstBuilder::VisitCountOperation(CountOperation* expr) {
   TagScope tag(this, "CountOperation");
   {
     AttributesScope attributes(this);
     AddAttribute("is_prefix", expr->is_prefix());
     AddAttribute("op", Token::Name(expr->op()));
   }
   Visit(expr->expression());
 }
 
@@ skipping 42 matching lines @@
     AddAttribute("mode", Variable::Mode2String(decl->mode()));
   }
   Visit(decl->proxy());
   if (decl->fun() != NULL) Visit(decl->fun());
 }
 
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal