Check forwarding pointer when marking objects for deoptimization.

BUG=
R=bmeurer@chromium.org, mvstanton@chromium.org

Review URL: https://codereview.chromium.org/148493004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18973 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/objects.cc

@@ -11745,14 +11745,23 @@ bool DependentCode::MarkCodeForDeoptimization(
   // Mark all the code that needs to be deoptimized.
   bool marked = false;
   for (int i = start; i < end; i++) {
-    if (is_code_at(i)) {
-      Code* code = code_at(i);
+    Object* object = object_at(i);
+    // TODO(hpayer): This is a temporary hack. Foreign objects move after
+    // new space evacuation. Since pretenuring may mark these objects as aborted
+    // we have to follow the forwarding pointer in that case.
+    MapWord map_word = HeapObject::cast(object)->map_word();
+    if (map_word.IsForwardingAddress()) {
+      object = map_word.ToForwardingAddress();
+    }
+    if (object->IsCode()) {
+      Code* code = Code::cast(object);
       if (!code->marked_for_deoptimization()) {
         code->set_marked_for_deoptimization(true);
         marked = true;
       }
     } else {
-      CompilationInfo* info = compilation_info_at(i);
+      CompilationInfo* info = reinterpret_cast<CompilationInfo*>(
+          Foreign::cast(object)->foreign_address());
       info->AbortDueToDependencyChange();
     }
   }