Enable turbofan deoptimization by default.

tools/run-tests.py

 #!/usr/bin/env python
 #
 # 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
@@ skipping 69 matching lines @@
 }
 
 TIMEOUT_DEFAULT = 60
 TIMEOUT_SCALEFACTOR = {"debug"   : 4,
                        "release" : 1 }
 
 # Use this to run several variants of the tests.
 VARIANT_FLAGS = {
     "default": [],
     "stress": ["--stress-opt", "--always-opt"],
-    "turbofan": ["--turbo-asm", "--turbo-filter=*", "--always-opt"],
+    "turbofan": ["--turbo-asm", "--turbo-filter=*", "--always-opt", "--turbo-deoptimization"],
     "nocrankshaft": ["--nocrankshaft"]}
 
 VARIANTS = ["default", "stress", "turbofan", "nocrankshaft"]
 
 MODE_FLAGS = {
     "debug"   : ["--nohard-abort", "--nodead-code-elimination",
                  "--nofold-constants", "--enable-slow-asserts",
                  "--debug-code", "--verify-heap"],
     "release" : ["--nohard-abort", "--nodead-code-elimination",
                  "--nofold-constants"]}
@@ skipping 485 matching lines @@
   exit_code = runner.Run(options.j)
   overall_duration = time.time() - start_time
 
   if options.time:
     verbose.PrintTestDurations(suites, overall_duration)
   return exit_code
 
 
 if __name__ == "__main__":
   sys.exit(Main())