PPC: Mark null and undefined as undetectable, and use it to handle abstract equality comparison in …

PPC: Mark null and undefined as undetectable, and use it to handle abstract equality comparison in the generic compare ic

Port 3ce9e808c5b9a6149ac987213854b5d59005f366

Original commit message:
    Marking as undetectable makes abstract equality of null, undefined, and
    other undetectable objects easier. Supporting it in the generic compare
    IC significantly speeds up dynamic comparison between those values and
    JSReceivers by not falling back to the runtime.

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

Committed: https://crrev.com/d4bdd7672615624367aab123325d295c41d464fc
Cr-Commit-Position: refs/heads/master@{#33876}

[MTBrandyberry, 2016-02-10 19:02:16]

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 19:02:20]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1684133003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1684133003/20001

[michael_dawson, 2016-02-10 19:04:53]

On 2016/02/10 19:02:20, 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/1684133003/20001
> View timeline at
>  https://chromium-cq-status.appspot.com/patch-timeline/1684133003/20001

lgtm

[commit-bot: I haz the power, 2016-02-10 19:21:31]

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

[commit-bot: I haz the power, 2016-02-10 19:21:32]

Dry run: This issue passed the CQ dry run.

[MTBrandyberry, 2016-02-10 20:06:56]

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

[commit-bot: I haz the power, 2016-02-10 20:07:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1684133003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1684133003/20001

[commit-bot: I haz the power, 2016-02-10 20:08:09]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-02-11 10:40:57]

Description was changed from

==========
PPC: Mark null and undefined as undetectable, and use it to handle abstract
equality comparison in the generic compare ic

Port 3ce9e808c5b9a6149ac987213854b5d59005f366

Original commit message:
    Marking as undetectable makes abstract equality of null, undefined, and
    other undetectable objects easier. Supporting it in the generic compare
    IC significantly speeds up dynamic comparison between those values and
    JSReceivers by not falling back to the runtime.

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

to

==========
PPC: Mark null and undefined as undetectable, and use it to handle abstract
equality comparison in the generic compare ic

Port 3ce9e808c5b9a6149ac987213854b5d59005f366

Original commit message:
    Marking as undetectable makes abstract equality of null, undefined, and
    other undetectable objects easier. Supporting it in the generic compare
    IC significantly speeds up dynamic comparison between those values and
    JSReceivers by not falling back to the runtime.

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

Committed: https://crrev.com/d4bdd7672615624367aab123325d295c41d464fc
Cr-Commit-Position: refs/heads/master@{#33876}
==========

[commit-bot: I haz the power, 2016-02-11 10:40:57]

Patchset 2 (id:??) landed as
https://crrev.com/d4bdd7672615624367aab123325d295c41d464fc
Cr-Commit-Position: refs/heads/master@{#33876}