Disable aggressive optimizations on the last optimization attempt.

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 35165ae97aea4a37b75ed41270bc1a4a5d0d7528..19f898381f02ab63c235ff45d329b5e7e78141a4 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -296,6 +296,9 @@ class HGraph: public HSubgraph {
   explicit HGraph(CompilationInfo* info);
 
   CompilationInfo* info() const { return info_; }
+
+  bool AllowAggressiveOptimizations() const;
+
   const ZoneList<HBasicBlock*>* blocks() const { return &blocks_; }
   const ZoneList<HPhi*>* phi_list() const { return phi_list_; }
   Handle<String> debug_name() const { return info_->function()->debug_name(); }