PPC: [crankshaft] Support ES6 tail call elimination.

PPC: [crankshaft] Support ES6 tail call elimination.

Port 22938040fdb9a061babe96f004355fd79b2958a0

Original commit message:
    HInvokeFunction and HApplyArguments instructions now support tail calling.

    Inlining of calls at tail position is not supported yet and therefore still disabled.

    The tail-call-megatest was modified so that the usages of "arguments" object do not disable Crankshaft.

R=ishell@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:4698
LOG=N

Committed: https://crrev.com/826f67bec35e1e2def0650dfa443f2534589f7a3
Cr-Commit-Position: refs/heads/master@{#34563}

[MTBrandyberry, 2016-03-07 20:13:17]

PTAL

[MTBrandyberry, 2016-03-07 20:13:27]

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

[commit-bot: I haz the power, 2016-03-07 20:13:35]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1767173002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1767173002/1

[michael_dawson, 2016-03-07 20:20:56]

On 2016/03/07 20:13:35, 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/1767173002/1
> View timeline at
>  https://chromium-cq-status.appspot.com/patch-timeline/1767173002/1

lgtm

[commit-bot: I haz the power, 2016-03-07 20:36:54]

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

[commit-bot: I haz the power, 2016-03-07 20:36:55]

Dry run: This issue passed the CQ dry run.

[MTBrandyberry, 2016-03-07 20:46:26]

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

[commit-bot: I haz the power, 2016-03-07 20:46:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1767173002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1767173002/1

[commit-bot: I haz the power, 2016-03-07 20:55:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-07 20:55:49]

Description was changed from

==========
PPC: [crankshaft] Support ES6 tail call elimination.

Port 22938040fdb9a061babe96f004355fd79b2958a0

Original commit message:
    HInvokeFunction and HApplyArguments instructions now support tail calling.

    Inlining of calls at tail position is not supported yet and therefore still
disabled.

    The tail-call-megatest was modified so that the usages of "arguments" object
do not disable Crankshaft.

R=ishell@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=v8:4698
LOG=N
==========

to

==========
PPC: [crankshaft] Support ES6 tail call elimination.

Port 22938040fdb9a061babe96f004355fd79b2958a0

Original commit message:
    HInvokeFunction and HApplyArguments instructions now support tail calling.

    Inlining of calls at tail position is not supported yet and therefore still
disabled.

    The tail-call-megatest was modified so that the usages of "arguments" object
do not disable Crankshaft.

R=ishell@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=v8:4698
LOG=N

Committed: https://crrev.com/826f67bec35e1e2def0650dfa443f2534589f7a3
Cr-Commit-Position: refs/heads/master@{#34563}
==========

[commit-bot: I haz the power, 2016-03-07 20:55:50]

Patchset 1 (id:??) landed as
https://crrev.com/826f67bec35e1e2def0650dfa443f2534589f7a3
Cr-Commit-Position: refs/heads/master@{#34563}