Disable dead code elimination of arguments object

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index d22cc32f1518ebf00545be935ad77e54ecc9323f..37b507bd92f02ec591040414775344536d653a2f 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -3378,7 +3378,7 @@ class HArgumentsObject V8_FINAL : public HDematerializedObject {
     SetFlag(kIsArguments);
   }
 
-  virtual bool IsDeletable() const V8_FINAL V8_OVERRIDE { return true; }
+  virtual bool IsDeletable() const V8_FINAL V8_OVERRIDE { return false; }

[Michael Starzinger, 2014/04/07 07:46:24]

nit: This is the default implementation in HValue, no need to override it, let's
just drop the override.

[Jarin, 2014/04/07 08:40:59]

Done.

 };