PPC: Reland "[turbofan] Instruction scheduler for Turbofan."

PPC: Reland "[turbofan] Instruction scheduler for Turbofan."

Port 89bb66de8510496fc9f011c8933e3a2fd96db6ec

Original commit message:
    Original CL: https://codereview.chromium.org/1375253002/

    Implement machine instruction scheduling after instruction selection.

R=baptiste.afsa@arm.com, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/fab09bbbc50211636a7ffe858ebc4586c3b583de
Cr-Commit-Position: refs/heads/master@{#32918}

[MTBrandyberry, 2015-12-16 19:29:33]

The CQ bit was checked by mbrandy@us.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2015-12-16 19:29:37]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1534433004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1534433004/1

[michael_dawson, 2015-12-16 19:40:52]

On 2015/12/16 19:29:37, commit-bot: I haz the power wrote:
> Dry run: CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/1534433004/1
> View timeline at
>  https://chromium-cq-status.appspot.com/patch-timeline/1534433004/1

lgtm

[commit-bot: I haz the power, 2015-12-16 20:09:45]

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

[commit-bot: I haz the power, 2015-12-16 20:09:46]

Dry run: This issue passed the CQ dry run.

[MTBrandyberry, 2015-12-16 20:10:13]

The CQ bit was checked by mbrandy@us.ibm.com

[commit-bot: I haz the power, 2015-12-16 20:10:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1534433004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1534433004/1

[commit-bot: I haz the power, 2015-12-16 20:12:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-12-16 20:12:51]

Description was changed from

==========
PPC: Reland "[turbofan] Instruction scheduler for Turbofan."

Port 89bb66de8510496fc9f011c8933e3a2fd96db6ec

Original commit message:
    Original CL: https://codereview.chromium.org/1375253002/

    Implement machine instruction scheduling after instruction selection.

R=baptiste.afsa@arm.com, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=
==========

to

==========
PPC: Reland "[turbofan] Instruction scheduler for Turbofan."

Port 89bb66de8510496fc9f011c8933e3a2fd96db6ec

Original commit message:
    Original CL: https://codereview.chromium.org/1375253002/

    Implement machine instruction scheduling after instruction selection.

R=baptiste.afsa@arm.com, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/fab09bbbc50211636a7ffe858ebc4586c3b583de
Cr-Commit-Position: refs/heads/master@{#32918}
==========

[commit-bot: I haz the power, 2015-12-16 20:12:52]

Patchset 1 (id:??) landed as
https://crrev.com/fab09bbbc50211636a7ffe858ebc4586c3b583de
Cr-Commit-Position: refs/heads/master@{#32918}