Don't add code dependencies on transitioning stores eagerly.

src/lithium.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.h"
 #include "scopes.h"
 
 #if V8_TARGET_ARCH_IA32
 #include "ia32/lithium-ia32.h"
@@ skipping 215 matching lines @@
   }
 }
 
 
 LChunk::LChunk(CompilationInfo* info, HGraph* graph)
     : spill_slot_count_(0),
       info_(info),
       graph_(graph),
       instructions_(32, graph->zone()),
       pointer_maps_(8, graph->zone()),
-      inlined_closures_(1, graph->zone()) {
+      inlined_closures_(1, graph->zone()),
+      deprecation_dependencies_(MapLess(), MapAllocator(graph->zone())) {
 }
 
 
 LLabel* LChunk::GetLabel(int block_id) const {
   HBasicBlock* block = graph_->blocks()->at(block_id);
   int first_instruction = block->first_instruction_index();
   return LLabel::cast(instructions_[first_instruction]);
 }
 
 
@@ skipping 118 matching lines @@
   return HConstant::cast(graph_->LookupValue(operand->index()));
 }
 
 
 Representation LChunk::LookupLiteralRepresentation(
     LConstantOperand* operand) const {
   return graph_->LookupValue(operand->index())->representation();
 }
 
 
+void LChunk::CommitDependencies(Handle<Code> code) const {
+  for (MapSet::const_iterator it = deprecation_dependencies_.begin(),
+       iend = deprecation_dependencies_.end(); it != iend; ++it) {
+    Handle<Map> map = *it;
+    ASSERT(!map->is_deprecated());
+    ASSERT(map->CanBeDeprecated());
+    Map::AddDependentCode(map, DependentCode::kTransitionGroup, code);
+  }
+
+  info_->CommitDependencies(code);
+}
+
+
 LChunk* LChunk::NewChunk(HGraph* graph) {
   DisallowHandleAllocation no_handles;
   DisallowHeapAllocation no_gc;
   graph->DisallowAddingNewValues();
   int values = graph->GetMaximumValueID();
   CompilationInfo* info = graph->info();
   if (values > LUnallocated::kMaxVirtualRegisters) {
     info->set_bailout_reason(kNotEnoughVirtualRegistersForValues);
     return NULL;
   }
@@ skipping 23 matching lines @@
 
   MarkEmptyBlocks();
 
   if (generator.GenerateCode()) {
     generator.CheckEnvironmentUsage();
     CodeGenerator::MakeCodePrologue(info(), "optimized");
     Code::Flags flags = info()->flags();
     Handle<Code> code =
         CodeGenerator::MakeCodeEpilogue(&assembler, flags, info());
     generator.FinishCode(code);
+    CommitDependencies(code);
     code->set_is_crankshafted(true);
     void* jit_handler_data =
         assembler.positions_recorder()->DetachJITHandlerData();
     LOG_CODE_EVENT(info()->isolate(),
                    CodeEndLinePosInfoRecordEvent(*code, jit_handler_data));
 
     CodeGenerator::PrintCode(code, info());
     return code;
   }
   assembler.AbortedCodeGeneration();
@@ skipping 159 matching lines @@
 
 
 LPhase::~LPhase() {
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceLithium(name(), chunk_);
   }
 }
 
 
 } }  // namespace v8::internal