Reapply "Support for precise stepping in functions compiled before debugging was started (step 2)"

src/objects-inl.h

 // Copyright 2011 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 2978 matching lines @@
 
 
 void Code::set_has_debug_break_slots(bool value) {
   ASSERT(kind() == FUNCTION);
   byte flags = READ_BYTE_FIELD(this, kFullCodeFlags);
   flags = FullCodeFlagsHasDebugBreakSlotsField::update(flags, value);
   WRITE_BYTE_FIELD(this, kFullCodeFlags, flags);
 }
 
 
+bool Code::is_compiled_optimizable() {
+  ASSERT(kind() == FUNCTION);
+  byte flags = READ_BYTE_FIELD(this, kFullCodeFlags);
+  return FullCodeFlagsIsCompiledOptimizable::decode(flags);
+}
+
+
+void Code::set_compiled_optimizable(bool value) {
+  ASSERT(kind() == FUNCTION);
+  byte flags = READ_BYTE_FIELD(this, kFullCodeFlags);
+  flags = FullCodeFlagsIsCompiledOptimizable::update(flags, value);
+  WRITE_BYTE_FIELD(this, kFullCodeFlags, flags);
+}
+
+
 int Code::allow_osr_at_loop_nesting_level() {
   ASSERT(kind() == FUNCTION);
   return READ_BYTE_FIELD(this, kAllowOSRAtLoopNestingLevelOffset);
 }
 
 
 void Code::set_allow_osr_at_loop_nesting_level(int level) {
   ASSERT(kind() == FUNCTION);
   ASSERT(level >= 0 && level <= kMaxLoopNestingMarker);
   WRITE_BYTE_FIELD(this, kAllowOSRAtLoopNestingLevelOffset, level);
@@ skipping 1668 matching lines @@
 #undef WRITE_INT_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_