Fix lost store side effects with escape analysis.

src/hydrogen-escape-analysis.cc

Index: src/hydrogen-escape-analysis.cc
diff --git a/src/hydrogen-escape-analysis.cc b/src/hydrogen-escape-analysis.cc
index 311091b6d993ddf78f7b373309d60b6869a249e7..b5086442fea9a62dc10685d2016ee85e8014848d 100644
--- a/src/hydrogen-escape-analysis.cc
+++ b/src/hydrogen-escape-analysis.cc
@@ -172,11 +172,14 @@ void HEscapeAnalysisPhase::AnalyzeDataFlow(HInstruction* allocate) {
           int index = store->access().offset() / kPointerSize;
           if (store->object() != allocate) continue;
           ASSERT(store->access().IsInobject());
-          state = NewStateCopy(store, state);
+          state = NewStateCopy(store->previous(), state);
           state->SetOperandAt(index, store->value());
           if (store->has_transition()) {
             state->SetOperandAt(0, store->transition());
           }
+          if (store->HasObservableSideEffects()) {
+            state->ReuseSideEffectsFromStore(store);
+          }
           store->DeleteAndReplaceWith(NULL);
           if (FLAG_trace_escape_analysis) {
             PrintF("Replacing store #%d%s\n", instr->id(),