Introduce flag --allocation-site-transitioning

test/mjsunit/array-feedback.js

 // 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 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --allow-natives-syntax --expose-gc
 // Flags: --noalways-opt
 
+if (!%HasAllocationSiteTransitioning()) {
+  quit();
+}
+
 var elements_kind = {
   fast_smi_only            :  'fast smi only elements',
   fast                     :  'fast elements',
   fast_double              :  'fast double elements',
   dictionary               :  'dictionary elements',
   external_byte            :  'external byte elements',
   external_unsigned_byte   :  'external unsigned byte elements',
   external_short           :  'external short elements',
   external_unsigned_short  :  'external unsigned short elements',
   external_int             :  'external int elements',
@@ skipping 159 matching lines @@
   }
 
   var realmBArray = Realm.eval(realmB, "Array");
   instanceof_check(Array);
   instanceof_check(Array);
   instanceof_check(Array);
   instanceof_check(realmBArray);
   instanceof_check(realmBArray);
   instanceof_check(realmBArray);
 })();