[turbofan] splinters should spill if there is no register use

[turbofan] splinters should spill if there is no register use

When allocating for splinters, we were prematurely reverting to the
hot range behavior, even when the range didn't actually have any
positions requiring a register. This could cause unnecessary moves.

BUG=

Committed: https://crrev.com/d2784b985fd4289a5cdeaa4c6dafa15c6f885aa4
Cr-Commit-Position: refs/heads/master@{#40472}

[Mircea Trofin, 2016-10-19 18:00:15]

The CQ bit was checked by mtrofin@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-10-19 18:00:19]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Mircea Trofin, 2016-10-19 18:02:07]

Description was changed from

==========
[turbofan] deferred blocks should spill if there is no register use

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

to

==========
[turbofan] splinters should spill if there is no register use

When allocating for splinters, we were prematurely reverting to the 
hot range behavior, even when the range didn't actually have any
positions requiring a register. This could cause unnecessary moves.

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

[Mircea Trofin, 2016-10-19 18:02:07]

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

[commit-bot: I haz the power, 2016-10-19 18:35:47]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-10-19 18:35:48]

Dry run: This issue passed the CQ dry run.

[Jarin, 2016-10-20 11:11:22]

lgtm

[Mircea Trofin, 2016-10-20 14:13:12]

The CQ bit was checked by mtrofin@chromium.org

[commit-bot: I haz the power, 2016-10-20 14:13:18]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-20 14:18:00]

Description was changed from

==========
[turbofan] splinters should spill if there is no register use

When allocating for splinters, we were prematurely reverting to the 
hot range behavior, even when the range didn't actually have any
positions requiring a register. This could cause unnecessary moves.

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

to

==========
[turbofan] splinters should spill if there is no register use

When allocating for splinters, we were prematurely reverting to the 
hot range behavior, even when the range didn't actually have any
positions requiring a register. This could cause unnecessary moves.

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

[commit-bot: I haz the power, 2016-10-20 14:18:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-17 22:08:16]

Description was changed from

==========
[turbofan] splinters should spill if there is no register use

When allocating for splinters, we were prematurely reverting to the 
hot range behavior, even when the range didn't actually have any
positions requiring a register. This could cause unnecessary moves.

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

to

==========
[turbofan] splinters should spill if there is no register use

When allocating for splinters, we were prematurely reverting to the
hot range behavior, even when the range didn't actually have any
positions requiring a register. This could cause unnecessary moves.

BUG=

Committed: https://crrev.com/d2784b985fd4289a5cdeaa4c6dafa15c6f885aa4
Cr-Commit-Position: refs/heads/master@{#40472}
==========

[commit-bot: I haz the power, 2016-11-17 22:08:17]

Patchset 1 (id:??) landed as
https://crrev.com/d2784b985fd4289a5cdeaa4c6dafa15c6f885aa4
Cr-Commit-Position: refs/heads/master@{#40472}