[turbofan] Switch JSForInPrepare to %ForInPrepare style.

[turbofan] Switch JSForInPrepare to %ForInPrepare style.

Now TurboFan always uses the newly introduced %ForInPrepare, no matter
whether baseline is the interpreter or fullcodegen. For fullcodegen, we
introduce a new PrepareId bailout point for this purpose.

Drive-by-fix: Avoid the NoObservableSideEffectsScope in Crankshaft and
use the PrepareId bailout point instead.

R=jarin@chromium.org
BUG=v8:3650
LOG=n

Committed: https://crrev.com/825ece488b8343b4a8e3637130dfab9030844f34
Cr-Commit-Position: refs/heads/master@{#33480}

[Benedikt Meurer, 2016-01-25 05:48:36]

Hey Jaro,

Here's the for-in unification for TurboFan (will cleanup runtime entry and typer
in follow up CLs).
Please take a look.

Thanks,
Benedikt

[Jarin, 2016-01-25 05:54:15]

lgtm

[Benedikt Meurer, 2016-01-25 05:54:25]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-01-25 05:54:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1630523002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1630523002/1

[commit-bot: I haz the power, 2016-01-25 06:00:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-25 06:01:01]

Description was changed from

==========
[turbofan] Switch JSForInPrepare to %ForInPrepare style.

Now TurboFan always uses the newly introduced %ForInPrepare, no matter
whether baseline is the interpreter or fullcodegen. For fullcodegen, we
introduce a new PrepareId bailout point for this purpose.

Drive-by-fix: Avoid the NoObservableSideEffectsScope in Crankshaft and
use the PrepareId bailout point instead.

R=jarin@chromium.org
BUG=v8:3650
LOG=n
==========

to

==========
[turbofan] Switch JSForInPrepare to %ForInPrepare style.

Now TurboFan always uses the newly introduced %ForInPrepare, no matter
whether baseline is the interpreter or fullcodegen. For fullcodegen, we
introduce a new PrepareId bailout point for this purpose.

Drive-by-fix: Avoid the NoObservableSideEffectsScope in Crankshaft and
use the PrepareId bailout point instead.

R=jarin@chromium.org
BUG=v8:3650
LOG=n

Committed: https://crrev.com/825ece488b8343b4a8e3637130dfab9030844f34
Cr-Commit-Position: refs/heads/master@{#33480}
==========

[commit-bot: I haz the power, 2016-01-25 06:01:01]

Patchset 1 (id:??) landed as
https://crrev.com/825ece488b8343b4a8e3637130dfab9030844f34
Cr-Commit-Position: refs/heads/master@{#33480}