[turbofan] Greedy: live range grouping.

[turbofan] Greedy: live range grouping.

Grouping of live ranges that would be beneficial if
allocated on the same register. Currently, that means phi
outputs and inputs.

Committed: https://crrev.com/8043a53a0732fabdd295c8d763b97d4333f51874
Cr-Commit-Position: refs/heads/master@{#30690}

[Mircea Trofin, 2015-09-09 23:29:47]

mtrofin@chromium.org changed reviewers:
+ bmeurer@chromium.org, jarin@chromium.org

[Benedikt Meurer, 2015-09-11 05:08:15]

LGTM (modulo the flag-definitions.h change of course). I think this is good to
land, but we should really figure out why the compilation time increases so
much.

[Mircea Trofin, 2015-09-11 05:10:24]

The CQ bit was checked by mtrofin@chromium.org

[Mircea Trofin, 2015-09-11 05:10:24]

The patchset sent to the CQ was uploaded after l-g-t-m from bmeurer@chromium.org
Link to the patchset: https://codereview.chromium.org/1312473018/#ps40001
(title: " ")

[commit-bot: I haz the power, 2015-09-11 05:10:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1312473018/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1312473018/40001

[commit-bot: I haz the power, 2015-09-11 05:35:49]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-09-11 05:36:01]

Patchset 3 (id:??) landed as
https://crrev.com/8043a53a0732fabdd295c8d763b97d4333f51874
Cr-Commit-Position: refs/heads/master@{#30690}