Adding a type vector to replace type cells.

src/flag-definitions.h

 // 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 403 matching lines @@
 // builtins-ia32.cc
 DEFINE_bool(inline_new, true, "use fast inline allocation")
 
 // checks.cc
 DEFINE_bool(stack_trace_on_abort, true,
             "print a stack trace if an assertion failure occurs")
 
 // codegen-ia32.cc / codegen-arm.cc
 DEFINE_bool(trace_codegen, false,
             "print name of functions for which code is generated")
+DEFINE_bool(trace_type_feedback, false,
+            "trace information about type feedback vector usage")
 DEFINE_bool(trace, false, "trace function calls")
 DEFINE_bool(mask_constants_with_cookie, true,
             "use random jit cookie to mask large constants")
 
 // codegen.cc
 DEFINE_bool(lazy, true, "use lazy compilation")
 DEFINE_bool(trace_opt, false, "trace lazy optimization")
 DEFINE_bool(trace_opt_stats, false, "trace lazy optimization statistics")
 DEFINE_bool(opt, true, "use adaptive optimizations")
 DEFINE_bool(always_opt, false, "always try to optimize functions")
@@ skipping 458 matching lines @@
 #undef DEFINE_ALIAS_float
 #undef DEFINE_ALIAS_args
 
 #undef FLAG_MODE_DECLARE
 #undef FLAG_MODE_DEFINE
 #undef FLAG_MODE_DEFINE_DEFAULTS
 #undef FLAG_MODE_META
 #undef FLAG_MODE_DEFINE_IMPLICATIONS
 
 #undef COMMA