- Reapply change r26880.

runtime/vm/object.cc

Index: runtime/vm/object.cc
===================================================================
--- runtime/vm/object.cc	(revision 26931)
+++ runtime/vm/object.cc	(working copy)
@@ -8646,6 +8646,21 @@
 }
 
 
+void Code::set_state_bits(intptr_t bits) const {
+  raw_ptr()->state_bits_ = bits;
+}
+
+
+void Code::set_is_optimized(bool value) const {
+  set_state_bits(OptimizedBit::update(value, raw_ptr()->state_bits_));
+}
+
+
+void Code::set_is_alive(bool value) const {
+  set_state_bits(AliveBit::update(value, raw_ptr()->state_bits_));
+}
+
+
 void Code::set_stackmaps(const Array& maps) const {
   ASSERT(maps.IsOld());
   StorePointer(&raw_ptr()->stackmaps_, maps.raw());