Turn off pre-tenuring of fast literals when we turn off high promotion mode.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 3c88980a576e8bcfc689fb6f6c62cfd93ae8fffb..d66f62d0002bb44859362e457eed3e0048b2ed17 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -970,6 +970,10 @@ bool Heap::PerformGarbageCollection(GarbageCollector collector,
       PrintPID("Unlimited new space size due to low promotion rate: %d MB\n",
                new_space_.MaximumCapacity() / MB);
     }
+    // We turn off pre-tenuring when we turn off high promotion mode.

[Michael Starzinger, 2013/04/12 10:53:41]

nit: The comment is not 100% accurate, this doesn't really turn off
pre-tenuring, it just gives Crankshaft the chance to recompile optimized code
that was compiled with pre-tenuring enabled.

[Hannes Payer (out of office), 2013/04/12 11:02:38]

Done.

+    if (FLAG_pretenure_literals) {
+      isolate_->stack_guard()->FullDeopt();
+    }
   }
 
   if (new_space_high_promotion_mode_active_ &&