Use a filter instead of a visitor to deoptimize selected functions in a context.

src/objects-inl.h

 // Copyright 2012 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4778 matching lines @@
   return Smi::cast(value)->value();
 }
 
 
 void Code::set_stub_info(int value) {
   ASSERT(kind() == COMPARE_IC || kind() == BINARY_OP_IC);
   WRITE_FIELD(this, kTypeFeedbackInfoOffset, Smi::FromInt(value));
 }
 
 
+void Code::set_deoptimizing_functions(Object* value) {
+  ASSERT(kind() == OPTIMIZED_FUNCTION);
+  WRITE_FIELD(this, kTypeFeedbackInfoOffset, value);
+}
+
+
+Object* Code::deoptimizing_functions() {
+  ASSERT(kind() == OPTIMIZED_FUNCTION);
+  return Object::cast(READ_FIELD(this, kTypeFeedbackInfoOffset));
+}
+
+
 ACCESSORS(Code, gc_metadata, Object, kGCMetadataOffset)
 INT_ACCESSORS(Code, ic_age, kICAgeOffset)
 
 
 byte* Code::instruction_start()  {
   return FIELD_ADDR(this, kHeaderSize);
 }
 
 
 byte* Code::instruction_end()  {
@@ skipping 930 matching lines @@
 #undef WRITE_UINT32_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_