Turn on allocation site pretenuring.

test/cctest/test-heap.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 2222 matching lines @@
 TEST(OptimizedPretenuringAllocationFoldingBlocks) {
   i::FLAG_allow_natives_syntax = true;
   i::FLAG_max_new_space_size = 2048;
   CcTest::InitializeVM();
   if (!CcTest::i_isolate()->use_crankshaft() || i::FLAG_always_opt) return;
   if (i::FLAG_gc_global || i::FLAG_stress_compaction) return;
   v8::HandleScope scope(CcTest::isolate());
   CcTest::heap()->SetNewSpaceHighPromotionModeActive(true);
 
   v8::Local<v8::Value> res = CompileRun(
-      "var number_elements = 3000;"
+      "var number_elements = 10000;"
       "var elements = new Array(number_elements);"
       "function DataObject() {"
       "  this.a = [{}];"
       "  this.b = [{}];"
       "  this.c = 1.1;"
       "  this.d = 1.2;"
       "  this.e = [{}];"
       "  this.f = 1.3;"
       "}"
       "function f() {"
@@ skipping 88 matching lines @@
   CcTest::InitializeVM();
   if (!CcTest::i_isolate()->use_crankshaft() || i::FLAG_always_opt) return;
   if (i::FLAG_gc_global || i::FLAG_stress_compaction) return;
   v8::HandleScope scope(CcTest::isolate());
 
   v8::Local<v8::Value> res = CompileRun(
       "var number_elements = 20000;"
       "var elements = new Array(number_elements);"
       "function f() {"
       "  for (var i = 0; i < number_elements; i++) {"
-      "    elements[i] = {a: 1.1, b: 2.2};"
+      "    elements[i] = {a: 1.1, b: 2.2, c: 3.3};"
       "  }"
       "  return elements[i - 1];"
       "};"
       "f(); f(); f();"
       "%OptimizeFunctionOnNextCall(f);"
       "f();");
 
   Handle<JSObject> o =
       v8::Utils::OpenHandle(*v8::Handle<v8::Object>::Cast(res));
 
@@ skipping 1294 matching lines @@
   for (int i = 0; i < 4; i++) {
     heap->CollectAllGarbage(false);
   }
 
   // The site still exists because of our global handle, but the code is no
   // longer referred to by dependent_code().
   DependentCode::GroupStartIndexes starts(site->dependent_code());
   int index = starts.at(DependentCode::kAllocationSiteTransitionChangedGroup);
   CHECK(!(site->dependent_code()->is_code_at(index)));
 }