[turbofan] Use unreliable receiver maps for __proto__ lowering.

[turbofan] Use unreliable receiver maps for __proto__ lowering.

When optimizing calls to get Object.prototype.__proto__ in
JSCallReducer, we can also consume unreliable receiver map
information, as long as the receiver maps are stable. In
that case we also need to install proper stability dependencies.

BUG=chromium:711195, v8:5267, v8:6241
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2816993002
Cr-Commit-Position: refs/heads/master@{#44634}
Committed: https://chromium.googlesource.com/v8/v8/+/136c712e61610422b8c31c692e660246271b8c17

[Benedikt Meurer, 2017-04-13 09:12:39]

The CQ bit was checked by bmeurer@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-13 09:12:41]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Jarin, 2017-04-13 09:16:37]

lgtm

[Benedikt Meurer, 2017-04-13 09:16:49]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2017-04-13 09:16:52]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2017-04-13 09:17:03]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-13 09:40:41]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1492075012361440, "parent_rev":
"6e70425be1b35531c87d3d9a8610a3f91a50026d", "commit_rev":
"136c712e61610422b8c31c692e660246271b8c17"}

[commit-bot: I haz the power, 2017-04-13 09:40:46]

Description was changed from

==========
[turbofan] Use unreliable receiver maps for __proto__ lowering.

When optimizing calls to get Object.prototype.__proto__ in
JSCallReducer, we can also consume unreliable receiver map
information, as long as the receiver maps are stable. In
that case we also need to install proper stability dependencies.

BUG=chromium:711195,v8:5267,v8:6241
R=jarin@chromium.org
==========

to

==========
[turbofan] Use unreliable receiver maps for __proto__ lowering.

When optimizing calls to get Object.prototype.__proto__ in
JSCallReducer, we can also consume unreliable receiver map
information, as long as the receiver maps are stable. In
that case we also need to install proper stability dependencies.

BUG=chromium:711195,v8:5267,v8:6241
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2816993002
Cr-Commit-Position: refs/heads/master@{#44634}
Committed:
https://chromium.googlesource.com/v8/v8/+/136c712e61610422b8c31c692e660246271...
==========

[commit-bot: I haz the power, 2017-04-13 09:40:47]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/136c712e61610422b8c31c692e660246271...