A load static of an initialized static final field can be converted to its value, as long as it is …

A load static of an initialized static final field can be converted to its value, as long as it is in old space or Smi, and can therefore be a literal node.
Add special objects to mark non_constant and unknown_constant in constant propagator so that there is no confusion with sentinels used in the graph.

R=asiva@google.com

Committed: https://code.google.com/p/dart/source/detail?r=22600

[siva, 2013-05-10 20:13:35]

lgtm

https://codereview.chromium.org/14969019/diff/3001/runtime/vm/object.h
File runtime/vm/object.h (right):

https://codereview.chromium.org/14969019/diff/3001/runtime/vm/object.h#newcod...
runtime/vm/object.h:345: }
Can you move this new block to just below transition_sentinel() so that they are
in the same order as the declaration below.

[srdjan, 2013-05-10 21:03:04]

https://codereview.chromium.org/14969019/diff/3001/runtime/vm/object.h
File runtime/vm/object.h (right):

https://codereview.chromium.org/14969019/diff/3001/runtime/vm/object.h#newcod...
runtime/vm/object.h:345: }
On 2013/05/10 20:13:35, siva wrote:
> Can you move this new block to just below transition_sentinel() so that they
are
> in the same order as the declaration below.

Done.

[srdjan, 2013-05-10 21:33:18]

Committed patchset #3 manually as r22600 (presubmit successful).

[Kevin Millikin (Google), 2013-05-13 08:13:10]

LGTM, and thanks for making the constant propagator safer.