[turbofan] TurboFan doesn't use String allocation pretenuring feedback.

[turbofan] TurboFan doesn't use String allocation pretenuring feedback.

We can make Heap::UpdateAllocationSite cheaper for TurboFan, because
there's no need to check for allocation mementos on Strings in case of
the TurboFan pipeline.

R=mvstanton@chromium.org

Review-Url: https://codereview.chromium.org/2710303002
Cr-Commit-Position: refs/heads/master@{#43407}
Committed: https://chromium.googlesource.com/v8/v8/+/208014abea8fff770b149cd52d10a4acbfa745dd

[Benedikt Meurer, 2017-02-23 18:47:18]

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

[commit-bot: I haz the power, 2017-02-23 18:47:29]

Dry run: 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, 2017-02-23 19:17:36]

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

[commit-bot: I haz the power, 2017-02-23 19:17:37]

Dry run: This issue passed the CQ dry run.

[mvstanton, 2017-02-24 08:31:55]

lgtm

[Benedikt Meurer, 2017-02-24 08:37:00]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2017-02-24 08:37:04]

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, 2017-02-24 09:19:05]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487925420235080, "parent_rev":
"9db139e1201862b2d38bc55305d81c2c6956d98f", "commit_rev":
"208014abea8fff770b149cd52d10a4acbfa745dd"}

[commit-bot: I haz the power, 2017-02-24 09:19:09]

Description was changed from

==========
[turbofan] TurboFan doesn't use String allocation pretenuring feedback.

We can make Heap::UpdateAllocationSite cheaper for TurboFan, because
there's no need to check for allocation mementos on Strings in case of
the TurboFan pipeline.

R=mvstanton@chromium.org
==========

to

==========
[turbofan] TurboFan doesn't use String allocation pretenuring feedback.

We can make Heap::UpdateAllocationSite cheaper for TurboFan, because
there's no need to check for allocation mementos on Strings in case of
the TurboFan pipeline.

R=mvstanton@chromium.org

Review-Url: https://codereview.chromium.org/2710303002
Cr-Commit-Position: refs/heads/master@{#43407}
Committed:
https://chromium.googlesource.com/v8/v8/+/208014abea8fff770b149cd52d10a4acbfa...
==========

[commit-bot: I haz the power, 2017-02-24 09:19:10]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/208014abea8fff770b149cd52d10a4acbfa...