PPC: Preserve argument count for calls.

PPC: Preserve argument count for calls.

Port 5de27c343bbf898ca87246caa1e83e533ec44561

Original commit message:
    Calls use registers for target, new_target and argument count.
    We don't always respect argument count. It didn't bite us in the past
    because the code paths where we clobbered it never used it, though
    in future it could be an issue.

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/0c3f7e931ebb58246aead3d4420502b582fbc05e
Cr-Commit-Position: refs/heads/master@{#33878}

[MTBrandyberry, 2016-02-10 18:59:06]

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

[commit-bot: I haz the power, 2016-02-10 18:59:14]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1687943002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1687943002/1

[michael_dawson, 2016-02-10 19:04:17]

On 2016/02/10 18:59:14, 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/1687943002/1
> View timeline at
>  https://chromium-cq-status.appspot.com/patch-timeline/1687943002/1

lgtm

[commit-bot: I haz the power, 2016-02-10 19:18:24]

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

[commit-bot: I haz the power, 2016-02-10 19:18:24]

Dry run: This issue passed the CQ dry run.

[MTBrandyberry, 2016-02-10 20:07:35]

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

[commit-bot: I haz the power, 2016-02-10 20:07:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1687943002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1687943002/1

[commit-bot: I haz the power, 2016-02-10 20:11:21]

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

[commit-bot: I haz the power, 2016-02-10 20:11:22]

Failed to request the patch to try. Please note that binary files are still
unsupported at the moment, this is being worked on.

Thanks for your patience.

Transient error: No JSON object could be decoded

[commit-bot: I haz the power, 2016-02-10 20:11:23]

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

[MTBrandyberry, 2016-02-10 20:20:07]

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

[commit-bot: I haz the power, 2016-02-10 20:20:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1687943002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1687943002/1

[commit-bot: I haz the power, 2016-02-10 20:28:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-11 10:41:00]

Description was changed from

==========
PPC: Preserve argument count for calls.

Port 5de27c343bbf898ca87246caa1e83e533ec44561

Original commit message:
    Calls use registers for target, new_target and argument count.
    We don't always respect argument count. It didn't bite us in the past
    because the code paths where we clobbered it never used it, though
    in future it could be an issue.

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=
==========

to

==========
PPC: Preserve argument count for calls.

Port 5de27c343bbf898ca87246caa1e83e533ec44561

Original commit message:
    Calls use registers for target, new_target and argument count.
    We don't always respect argument count. It didn't bite us in the past
    because the code paths where we clobbered it never used it, though
    in future it could be an issue.

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/0c3f7e931ebb58246aead3d4420502b582fbc05e
Cr-Commit-Position: refs/heads/master@{#33878}
==========

[commit-bot: I haz the power, 2016-02-11 10:41:01]

Patchset 1 (id:??) landed as
https://crrev.com/0c3f7e931ebb58246aead3d4420502b582fbc05e
Cr-Commit-Position: refs/heads/master@{#33878}