[ic] Temporary resurrect ICStateField to recover performance regression.

[ic] Temporary resurrect ICStateField to recover performance regression.

Zero value of ICStateField part made megamorphic stub cache unusable.
We need to revisit hashing algorithm in order to remove the ICStateField.

BUG=chromium:619016
LOG=N

Committed: https://crrev.com/6c5152406f29676b50eb9db10b82b7dfb92ac5d6
Cr-Commit-Position: refs/heads/master@{#36959}

[Igor Sheludko, 2016-06-13 14:38:13]

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

[commit-bot: I haz the power, 2016-06-13 14:38:20]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2064713002/1

[Igor Sheludko, 2016-06-13 14:38:28]

ishell@chromium.org changed reviewers:
+ verwaest@chromium.org

[Igor Sheludko, 2016-06-13 14:38:28]

PTAL

[commit-bot: I haz the power, 2016-06-13 15:07:03]

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

[commit-bot: I haz the power, 2016-06-13 15:07:04]

Dry run: This issue passed the CQ dry run.

[Toon Verwaest, 2016-06-14 10:48:26]

lgtm

[Igor Sheludko, 2016-06-14 10:49:10]

The CQ bit was checked by ishell@chromium.org

[commit-bot: I haz the power, 2016-06-14 10:49:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2064713002/1

[commit-bot: I haz the power, 2016-06-14 10:53:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-14 10:54:41]

Description was changed from

==========
[ic] Temporary resurrect ICStateField to recover performance regression.

Zero value of ICStateField part made megamorphic stub cache unusable.
We need to revisit hashing algorithm in order to remove the ICStateField.

BUG=chromium:619016
LOG=N
==========

to

==========
[ic] Temporary resurrect ICStateField to recover performance regression.

Zero value of ICStateField part made megamorphic stub cache unusable.
We need to revisit hashing algorithm in order to remove the ICStateField.

BUG=chromium:619016
LOG=N

Committed: https://crrev.com/6c5152406f29676b50eb9db10b82b7dfb92ac5d6
Cr-Commit-Position: refs/heads/master@{#36959}
==========

[commit-bot: I haz the power, 2016-06-14 10:54:42]

Patchset 1 (id:??) landed as
https://crrev.com/6c5152406f29676b50eb9db10b82b7dfb92ac5d6
Cr-Commit-Position: refs/heads/master@{#36959}