Add dynamic stack frame alignment to optimized functions with untagged doubles on the stack.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 578 matching lines @@
   // Static data in the keyed lookup cache.
   static ExternalReference keyed_lookup_cache_keys(Isolate* isolate);
   static ExternalReference keyed_lookup_cache_field_offsets(Isolate* isolate);
 
   // Static variable Factory::the_hole_value.location()
   static ExternalReference the_hole_value_location(Isolate* isolate);
 
   // Static variable Factory::arguments_marker.location()
   static ExternalReference arguments_marker_location(Isolate* isolate);
 
+  // Static variable Factory::frame_alignment_marker.location()
+  static ExternalReference frame_alignment_marker_location(Isolate* isolate);
+
   // Static variable Heap::roots_address()
   static ExternalReference roots_address(Isolate* isolate);
 
   // Static variable StackGuard::address_of_jslimit()
   static ExternalReference address_of_stack_limit(Isolate* isolate);
 
   // Static variable StackGuard::address_of_real_jslimit()
   static ExternalReference address_of_real_stack_limit(Isolate* isolate);
 
   // Static variable RegExpStack::limit_address()
@@ skipping 263 matching lines @@
  public:
   NullCallWrapper() { }
   virtual ~NullCallWrapper() { }
   virtual void BeforeCall(int call_size) const { }
   virtual void AfterCall() const { }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_