Experimental: disable fast case switches for now. See:...

src/codegen.cc

 // Copyright 2007-2008 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 453 matching lines @@
     } else {
       frame_->MergeTo(start_frame);
     }
     masm()->bind(&case_labels[i]);
     VisitStatements(cases->at(i)->statements());
   }
 }
 
 
 bool CodeGenerator::TryGenerateFastCaseSwitchStatement(SwitchStatement* node) {
+  // TODO(238): Due to issue 238, fast case switches can crash on ARM
+  // and possibly IA32.  They are disabled for now.
+  // See http://code.google.com/p/v8/issues/detail?id=238
+  return false;
+
   ZoneList<CaseClause*>* cases = node->cases();
   int length = cases->length();
 
   if (length < FastCaseSwitchMinCaseCount()) {
     return false;
   }
 
   // Test whether fast-case should be used.
   int default_index = -1;
   int min_index = Smi::kMaxValue;
@@ skipping 79 matching lines @@
 void ArgumentsAccessStub::Generate(MacroAssembler* masm) {
   switch (type_) {
     case READ_LENGTH: GenerateReadLength(masm); break;
     case READ_ELEMENT: GenerateReadElement(masm); break;
     case NEW_OBJECT: GenerateNewObject(masm); break;
   }
 }
 
 
 } }  // namespace v8::internal