[turbofan] Recognize fast path for Number.parseInt.

[turbofan] Recognize fast path for Number.parseInt.

The Number.parseInt (and therefore the parseInt function on the global
object) are often used instead of Math.floor or just plain int32
truncation, and we can easily recognize those cases and provide a fast
path in TurboFan.

R=jarin@chromium.org

Committed: https://crrev.com/f50721d56d29ade284730739befc62b99cbf7645
Cr-Commit-Position: refs/heads/master@{#37518}

[Benedikt Meurer, 2016-07-05 09:24:54]

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

[commit-bot: I haz the power, 2016-07-05 09:24:59]

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

[Benedikt Meurer, 2016-07-05 09:25:44]

Hey Jaro,

Here's some low hanging fool.
Please take a look.

Thanks,
Benedikt

[Jarin, 2016-07-05 09:29:00]

lgtm

[Benedikt Meurer, 2016-07-05 09:29:10]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2016-07-05 09:29:14]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-07-05 09:29:17]

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, 2016-07-05 09:50:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-05 09:52:52]

Description was changed from

==========
[turbofan] Recognize fast path for Number.parseInt.

The Number.parseInt (and therefore the parseInt function on the global
object) are often used instead of Math.floor or just plain int32
truncation, and we can easily recognize those cases and provide a fast
path in TurboFan.

R=jarin@chromium.org
==========

to

==========
[turbofan] Recognize fast path for Number.parseInt.

The Number.parseInt (and therefore the parseInt function on the global
object) are often used instead of Math.floor or just plain int32
truncation, and we can easily recognize those cases and provide a fast
path in TurboFan.

R=jarin@chromium.org

Committed: https://crrev.com/f50721d56d29ade284730739befc62b99cbf7645
Cr-Commit-Position: refs/heads/master@{#37518}
==========

[commit-bot: I haz the power, 2016-07-05 09:52:53]

Patchset 1 (id:??) landed as
https://crrev.com/f50721d56d29ade284730739befc62b99cbf7645
Cr-Commit-Position: refs/heads/master@{#37518}