Enable weak embedded maps in optimized code.

src/objects.cc

 // Copyright 2013 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 10366 matching lines @@
               GetIsolate(), info->target_address(), Deoptimizer::SOFT))) {
         CHECK(RelocInfo::IsRuntimeEntry(info->rmode()));
         PrintF("            %s\n", last_comment);
         return;
       }
     }
   }
 }
 
 
+bool Code::CanDeoptAt(Address pc) {
+  DeoptimizationInputData* deopt_data =
+      DeoptimizationInputData::cast(deoptimization_data());
+  Address code_start_address = instruction_start();
+  for (int i = 0; i < deopt_data->DeoptCount(); i++) {
+    if (deopt_data->Pc(i)->value() == -1) continue;
+    Address address = code_start_address + deopt_data->Pc(i)->value();
+    if (address == pc) return true;
+  }
+  return false;
+}
+
+
 // Identify kind of code.
 const char* Code::Kind2String(Kind kind) {
   switch (kind) {
     case FUNCTION: return "FUNCTION";
     case OPTIMIZED_FUNCTION: return "OPTIMIZED_FUNCTION";
     case STUB: return "STUB";
     case BUILTIN: return "BUILTIN";
     case LOAD_IC: return "LOAD_IC";
     case KEYED_LOAD_IC: return "KEYED_LOAD_IC";
     case STORE_IC: return "STORE_IC";
@@ skipping 5418 matching lines @@
   return static_cast<Type*>(type_raw());
 }
 
 
 void JSGlobalPropertyCell::set_type(Type* type, WriteBarrierMode ignored) {
   set_type_raw(type, ignored);
 }
 
 
 } }  // namespace v8::internal