Revert "Revert of [turbofan] Remove redundant code.[...]"

Revert "Revert of [turbofan] Remove redundant code. (patchset #1 id:1
 of https://codereview.chromium.org/1428943004/ )"

This reverts commit 5f4828a12db3f04f8b92f10724c5c18dd5efc7e7.

Maintaining the behavior of processing both ranges with spill ranges,
as well as those with spill operands.

BUG=

Committed: https://crrev.com/b10e8506ac01b08a142fcc3508f2d44012bbc2bb
Cr-Commit-Position: refs/heads/master@{#31924}

[Mircea Trofin, 2015-11-04 07:43:10]

Description was changed from

==========
Revert "Revert of [turbofan] Remove redundant code. (patchset #1 id:1 of
https://codereview.chromium.org/1428943004/ )"

This reverts commit 5f4828a12db3f04f8b92f10724c5c18dd5efc7e7.

BUG=
==========

to

==========
Revert "Revert of [turbofan] Remove redundant code. (patchset #1 id:1
 of https://codereview.chromium.org/1428943004/ )"

This reverts commit 5f4828a12db3f04f8b92f10724c5c18dd5efc7e7.

Maintaining the behavior of processing both ranges with spill ranges,
as well as those with spill operands.

BUG=
==========

[Mircea Trofin, 2015-11-04 07:43:10]

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

[Jarin, 2015-11-04 09:27:55]

lgtm

[Mircea Trofin, 2015-11-04 16:13:40]

On 2015/11/04 09:27:55, Jarin wrote:
> lgtm

PTAL - greedy doesn't like eagerly pre-spilling ranges, when grouping. I think
that's the right thing to do there (and we may do the same for Linear).

[Mircea Trofin, 2015-11-10 17:49:51]

The CQ bit was checked by mtrofin@chromium.org

[Mircea Trofin, 2015-11-10 17:49:52]

The patchset sent to the CQ was uploaded after l-g-t-m from jarin@chromium.org
Link to the patchset: https://codereview.chromium.org/1406223010/#ps40001
(title: " ")

[commit-bot: I haz the power, 2015-11-10 17:50:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1406223010/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1406223010/40001

[commit-bot: I haz the power, 2015-11-10 18:06:26]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-11-10 18:06:41]

Patchset 3 (id:??) landed as
https://crrev.com/b10e8506ac01b08a142fcc3508f2d44012bbc2bb
Cr-Commit-Position: refs/heads/master@{#31924}