Enable optimization of functions with generic switches.

src/rewriter.cc

 // Copyright 2012 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 189 matching lines @@
   ZoneList<CaseClause*>* clauses = node->cases();
   bool set_after_switch = is_set_;
   for (int i = clauses->length() - 1; i >= 0; --i) {
     CaseClause* clause = clauses->at(i);
     Process(clause->statements());
   }
   is_set_ = is_set_ && set_after_switch;
 }
 
 
-void Processor::VisitCaseClause(CaseClause* clause) {
-  UNREACHABLE();
-}
-
-
 void Processor::VisitContinueStatement(ContinueStatement* node) {
   is_set_ = false;
 }
 
 
 void Processor::VisitBreakStatement(BreakStatement* node) {
   is_set_ = false;
 }
 
 
@@ skipping 59 matching lines @@
           processor.factory()->NewReturnStatement(result_proxy, pos);
       body->Add(result_statement, info->zone());
     }
   }
 
   return true;
 }
 
 
 } }  // namespace v8::internal