[turbofan] Smartify the GraphReducer.

[turbofan] Smartify the GraphReducer.

Don't use the generic algorithm, but instead start going into the
direction of ControlReducer, using a stack plus a revisit queue to
not miss any more possibilities for reductions anymore.

TEST=cctest,unittests
R=dcarney@chromium.org

Committed: https://chromium.googlesource.com/v8/v8/+/f047507370634155113d78685372630a230613cf

Committed: https://chromium.googlesource.com/v8/v8/+/6e148989a4227a5290a7f8ca72c71f5740870afe

Committed: https://chromium.googlesource.com/v8/v8/+/5934656921a848cb112c2e5e146d5c0bf9d8904a

[Benedikt Meurer, 2014-11-13 10:38:42]

PTAL

[dcarney, 2014-11-13 10:42:15]

lgtm

https://codereview.chromium.org/726513002/diff/1/src/zone-containers.h
File src/zone-containers.h (right):

https://codereview.chromium.org/726513002/diff/1/src/zone-containers.h#newcode52
src/zone-containers.h:52: ZoneDeque(int size, Zone* zone)
 i really think we should be taking size_t here - i intend to change the
signatures for ZoneVector

[Benedikt Meurer, 2014-11-13 10:50:34]

https://codereview.chromium.org/726513002/diff/1/src/zone-containers.h
File src/zone-containers.h (right):

https://codereview.chromium.org/726513002/diff/1/src/zone-containers.h#newcode52
src/zone-containers.h:52: ZoneDeque(int size, Zone* zone)
Ups that was dead code anyway.

[Benedikt Meurer, 2014-11-13 11:34:22]

Committed patchset #4 (id:60001) manually as
f047507370634155113d78685372630a230613cf (tree was closed).

[Benedikt Meurer, 2014-11-14 08:00:45]

Committed patchset #4 (id:60001) manually as
6e148989a4227a5290a7f8ca72c71f5740870afe (presubmit successful).

[Benedikt Meurer, 2014-11-17 12:12:42]

Committed patchset #4 (id:60001) manually as
5934656921a848cb112c2e5e146d5c0bf9d8904a (presubmit successful).