Don't add code dependencies on transitioning stores eagerly.

src/ia32/lithium-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "v8.h"
 
 #if V8_TARGET_ARCH_IA32
 
 #include "lithium-allocator-inl.h"
 #include "ia32/lithium-ia32.h"
@@ skipping 460 matching lines @@
   return chunk_;
 }
 
 
 void LChunkBuilder::Abort(BailoutReason reason) {
   info()->set_bailout_reason(reason);
   status_ = ABORTED;
 }
 
 
+void LChunkBuilder::AddDeprecationDependency(Handle<Map> map) {
+  if (map->is_deprecated()) return Abort(kMapBecameDeprecated);
+  chunk_->AddDeprecationDependency(map);
+}
+
+
 LUnallocated* LChunkBuilder::ToUnallocated(Register reg) {
   return new(zone()) LUnallocated(LUnallocated::FIXED_REGISTER,
                                   Register::ToAllocationIndex(reg));
 }
 
 
 LUnallocated* LChunkBuilder::ToUnallocated(XMMRegister reg) {
   return new(zone()) LUnallocated(LUnallocated::FIXED_DOUBLE_REGISTER,
                                   XMMRegister::ToAllocationIndex(reg));
 }
@@ skipping 1924 matching lines @@
   }
 
   // We only need a scratch register if we have a write barrier or we
   // have a store into the properties array (not in-object-property).
   LOperand* temp = (!is_in_object || needs_write_barrier ||
                     needs_write_barrier_for_map) ? TempRegister() : NULL;
 
   // We need a temporary register for write barrier of the map field.
   LOperand* temp_map = needs_write_barrier_for_map ? TempRegister() : NULL;
 
+  // Add a deprecation dependency on the transition target map.
+  if (instr->has_transition()) {
+    AddDeprecationDependency(instr->transition_map());
+  }
+
   LInstruction* result =
       new(zone()) LStoreNamedField(obj, val, temp, temp_map);
   if (!instr->access().IsExternalMemory() &&
       instr->field_representation().IsHeapObject() &&
       (val->IsConstantOperand()
        ? HConstant::cast(instr->value())->HasSmiValue()
        : !instr->value()->type().IsHeapObject())) {
     result = AssignEnvironment(result);
   }
   return result;
@@ skipping 265 matching lines @@
   LOperand* index = UseTempRegister(instr->index());
   LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index);
   LInstruction* result = DefineSameAsFirst(load);
   return AssignPointerMap(result);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32