Recognize in the fast-mode code generator when a subexpression is a...

src/fast-codegen.cc

 // 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 178 matching lines @@
   UNREACHABLE();
 }
 
 
 void FastCodeGenerator::VisitSlot(Slot* expr) {
   // Slots do not appear directly in the AST.
   UNREACHABLE();
 }
 
 
+void FastCodeGenerator::VisitLiteral(Literal* expr) {
+  // No code is emitted (here) for simple literals.
+}
+
+
 void FastCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) {
   UNREACHABLE();
 }
 
 
 void FastCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
   UNREACHABLE();
 }
 
 
@@ skipping 51 matching lines @@
   UNREACHABLE();
 }
 
 
 void FastCodeGenerator::VisitThisFunction(ThisFunction* expr) {
   UNREACHABLE();
 }
 
 
 } }  // namespace v8::internal