PPC: [compiler] Introduce initial StrictEqualStub.

PPC: [compiler] Introduce initial StrictEqualStub.

Port 4acb492e145b39700bbbc36ff0da5830de50f814

Original commit message:
    Initial version of a new StrictEqualStub written as TurboFan code stub,
    that implements the full strict equality comparison and is usable for
    both TurboFan and Ignition (and soon for the generic CompareIC case
    too). The stub is not fully optimized yet, i.e. we still go to the
    runtime for string comparisons, but that'll be addressed in a follow-up
    CL.

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

Committed: https://crrev.com/017375f328ff0470b1e0922ebf17ea24e3debd26
Cr-Commit-Position: refs/heads/master@{#34444}

[MTBrandyberry, 2016-03-02 18:25:24]

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

[commit-bot: I haz the power, 2016-03-02 18:25:26]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1756243002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1756243002/1

[commit-bot: I haz the power, 2016-03-02 18:45:11]

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

[commit-bot: I haz the power, 2016-03-02 18:45:12]

Dry run: This issue passed the CQ dry run.

[michael_dawson, 2016-03-02 19:20:50]

On 2016/03/02 18:45:12, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

lgtm

[MTBrandyberry, 2016-03-02 19:22:49]

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

[commit-bot: I haz the power, 2016-03-02 19:22:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1756243002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1756243002/1

[commit-bot: I haz the power, 2016-03-02 19:25:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-02 19:26:26]

Description was changed from

==========
PPC: [compiler] Introduce initial StrictEqualStub.

Port 4acb492e145b39700bbbc36ff0da5830de50f814

Original commit message:
    Initial version of a new StrictEqualStub written as TurboFan code stub,
    that implements the full strict equality comparison and is usable for
    both TurboFan and Ignition (and soon for the generic CompareIC case
    too). The stub is not fully optimized yet, i.e. we still go to the
    runtime for string comparisons, but that'll be addressed in a follow-up
    CL.

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

to

==========
PPC: [compiler] Introduce initial StrictEqualStub.

Port 4acb492e145b39700bbbc36ff0da5830de50f814

Original commit message:
    Initial version of a new StrictEqualStub written as TurboFan code stub,
    that implements the full strict equality comparison and is usable for
    both TurboFan and Ignition (and soon for the generic CompareIC case
    too). The stub is not fully optimized yet, i.e. we still go to the
    runtime for string comparisons, but that'll be addressed in a follow-up
    CL.

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

Committed: https://crrev.com/017375f328ff0470b1e0922ebf17ea24e3debd26
Cr-Commit-Position: refs/heads/master@{#34444}
==========

[commit-bot: I haz the power, 2016-03-02 19:26:27]

Patchset 1 (id:??) landed as
https://crrev.com/017375f328ff0470b1e0922ebf17ea24e3debd26
Cr-Commit-Position: refs/heads/master@{#34444}