Don't add code dependencies on transitioning stores eagerly.

src/mips/lithium-mips.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"
 
 #include "lithium-allocator-inl.h"
 #include "mips/lithium-mips.h"
 #include "mips/lithium-codegen-mips.h"
 #include "hydrogen-osr.h"
@@ skipping 416 matching lines @@
   return chunk_;
 }
 
 
 void LCodeGen::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(DoubleRegister reg) {
   return new(zone()) LUnallocated(LUnallocated::FIXED_DOUBLE_REGISTER,
                                   DoubleRegister::ToAllocationIndex(reg));
 }
@@ skipping 1797 matching lines @@
     val = UseTempRegister(instr->value());
   } else if (instr->field_representation().IsDouble()) {
     val = UseRegisterAtStart(instr->value());
   } else {
     val = UseRegister(instr->value());
   }
 
   // We need a temporary register for write barrier of the map field.
   LOperand* temp = 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);
   if (!instr->access().IsExternalMemory() &&
       instr->field_representation().IsHeapObject() &&
       !instr->value()->type().IsHeapObject()) {
     result = AssignEnvironment(result);
   }
   return result;
 }
 
 
@@ skipping 247 matching lines @@
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseRegister(instr->index());
   LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index);
   LInstruction* result = DefineSameAsFirst(load);
   return AssignPointerMap(result);
 }
 
 
 } }  // namespace v8::internal