Fix lost store side effects with escape analysis.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 8668793c8a3e4844783ca40d1ad1a1cc054f6829..234bc0a3f3128d850098271514e977f70b45f7f3 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -3224,6 +3224,12 @@ class HCapturedObject V8_FINAL : public HDematerializedObject {
   int length() const { return values_.length(); }
   int capture_id() const { return capture_id_; }
 
+  void ReuseSideEffectsFromStore(HInstruction* store) {
+    ASSERT(store->HasObservableSideEffects());
+    ASSERT(store->IsStoreNamedField());
+    gvn_flags_ = store->gvn_flags();

[titzer, 2013/08/28 12:17:03]

Maybe union instead of overwriting? I think CapturedObject has no side effects
currently, but might be more future-safe...

[Michael Starzinger, 2013/08/28 12:25:42]

Done.

+  }
+
   // Replay effects of this instruction on the given environment.
   void ReplayEnvironment(HEnvironment* env);